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SR 09-26-2017 8A City Council Report City Council Meeting: September 26, 2017 Agenda Item: 8.A 1 of 9 To: Mayor and City Council From: Susan Cline, Director, Public Works, Water Resources Subject: Approval of Sanitary Sewer System Master Plan Recommended Action Staff recommends that the City Council approve the 2017 Sanitary Sewer System Master Plan. Executive Summary The 2017 Sanitary Sewer System Master Plan (SSSMP) (Attachment A) provides the City with a tool for planning sanitary sewer collection system infrastructure improvements. The primary purpose of this Master Plan is to evaluate the capacity of the City’s existing sanitary sewer system under current conditions and plan for the capacity required by future conditions associated with anticipated development projects, including the Land Use and Circulation Element (LUCE) and the Downtown Community Plan (DCP). In order to analyze the impacts of existing and future sewer flows, a numerical hydraulic model was developed. The analysis found that the City’s sewer system performs well under both existing and future conditions. Existing conditions show a 1% shortfall in sewer flow capacity citywide, and under future build out conditions, only 3% of the modeled pipelines exhibited a capacity deficiency. The ability of the sewer collection system to meet future conditions with only modest investments in sewer upgrades paid for by development fees means these improvements can be incorporated into the City’s existing $3 million per year sewer main replacement Capital Improvement Program forecast, as presented below. Description FY 2018/19 FY 2019/20 FY 2020/21 FY 2021/22 FY2022/23 Capacity Improvements $2,000,000 $1,200,000 $1,600,000 $2,000,000 Field Review Services $100,000 $80,000 Pipeline Replacements $900,000 $1,800,000 $1,400,000 $2,920,000 $1,000,000 2 of 9 TOTAL ANNUAL CIP $3,000,000 $3,000,000 $3,000,000 $3,000,000 $3,000,000 Background Santa Monica’s wastewater system includes a collection system including gravity sewers, force mains, monitoring stations and a lift station to help convey sewage to the City of Los Angeles’ Hyperion Water Reclamation Plant in El Segundo for treatment and disposal. The City’s sanitary sewer facilities include approximately 152 miles of pipelines, 2,800 maintenance holes, two permanent flow monitoring and sampling stations, and one 26-million-gallons-per-day (MGD) pumping station, referred to as the Moss Avenue Pump Station (MAPS), located at 1623 Appian Way. The City’s sanitary sewer system is shown in Figure 1. Prior studies included the development of a limited model assessing the capacity of the trunk sewer used to discharge brine (the wastewater produced as a by-product of potable water treatment process) from the City’s water treatment plant into the sewer system at 19th and Broadway (2011), and a Sewer System Management Plan (2012) which addressed sewer system organization and management, operations and maintenance, overflow response plans, and water quality monitoring programs. The last comprehensive Sewer Master Plan for the system was conducted in 1992. The findings and recommendations of the 1992 Master Plan were mostly not implemented, however, as the 1994 Northridge Earthquake caused considerable damage to the sewer system, after which approximately 80% of the system was rebuilt and rehabilitated. Discussion This 2017 Sanitary Sewer System Master Plan (SSSMP) was prepared to reflect current conditions in the City and anticipated future developments coincident with the LUCE and DCP planning horizons of year 2030, and to provide the City with a tool for planning improvements needed for sanitary sewer collection system infrastructure. The Downtown Community Plan EIR includes mitigation measure MM U-4 which states: “In addition to the improvements to the water delivery system described in the MM U-1, the City shall ensure adequate financing for funding of infrastructure improvements to the wastewater system. The DPIFP described in MM U-1 shall determine the costs of and establish a funding program for the following capital improvements to wastewater 3 of 9 conveyance as needed to serve the demands of new projects occurring under the Downtown Community Plan.” The primary purpose of this planning document is to evaluate the capacity of the City’s sanitary sewer system under current conditions and plan for any necessary improvements in capacity to accommodate anticipated new development in the City. These improvements would be implemented within the City’s Capital Improvement Program (CIP). To fully assess existing conditions in the sewer collection system and plan for the future capacity needs of the sanitary sewer system, future flow estimates incorporate the changes in sanitary flows that would be generated by anticipated development and the additional water that enters the sewer system from storm-related events. The additional sanitary sewer flows associated with these development projects are derived by applying the applicable sewer discharge factors for the land use types and densities of each planned development project. Future development projects and their status in the development process are depicted graphically on Figure 2. Based on these factors, future average dry weather flows are projected to increase from 14.4 million to 16.5 million gallons per day (MGD), an increase of approximately 14 percent. About half of this increase is projected to occur in the downtown area. 4 of 9 Figure 1 Figure 2 5 of 9 Recent and near-term actions planned by the City continue to support the City’s 6 of 9 sustainability goals and minimize the projected increase of sewage generation related to new development in the City. Foremost among these programs is the recently adopted Water Neutrality Ordinance and the programmatic efforts of the Sustainable Water Infrastructure Project (SWIP). Each of these programs will help in reducing the projected overall increase in sewer flows and are summarized below. Water Neutrality In May 2017, the Santa Monica City Council adopted a Water Neutrality Ordinance to require that new development offset water use on site or off site, or alternately, pay the City an in-lieu fee to fund retrofitting of plumbing fixtures offsite. The ordinance would prohibit a new development from exceeding the water use of the existing development on that property. If that requirement could not be met onsite, the excess water demand would have to be offset by reducing the water demand (through fixture replacement) at other sites within the City. Given this water neutrality requirement, much if not all of the projected overall increase in future sewage flow should be offset through this growth- funded plumbing fixture retrofit program. It should be noted that while this water neutrality program may offset an increase in overall sewage flows, Water Neutrality may still allow for an increase in flows at any specific site. With this program provision, some of the large future developments could still have a substantial point load increase in sewage discharges. To plan for this potential increase associated with these developments and to assure adequate capacity in the sanitary sewer system collection system network, the impact of site specific increases has been incorporated in the hydraulic model. Proceeding in this manner, the assessment included some anticipated impact from new development to reduce the risk of sanitary sewer overflows. SWIP – Water Reclamation Facility (WRF) The City of Santa Monica Sustainable Water Infrastructure Project (SWIP) will provide for the treatment and reuse of brackish/saline impaired groundwater, recycled municipal wastewater and stormwater runoff. In addition, the SWIP will help improve the water quality in the Santa Monica Bay by reducing urban runoff into the Bay. 7 of 9 The Water Reclamation Facility (WRF) component of the SWIP will have the greatest benefit to the City’s sanitary sewer system. The WRF will remove 1 MGD of sewage from the sewer collection system in the area. This will provide additional pipeline capacity and reduce the cost of wastewater treatment and disposal currently charged by the City of Los Angeles. Assessment Modeling To support the evaluation of the City’s sanitary sewer system for both existing and future conditions, a hydraulic model was developed. The hydraulic model development activities included a comprehensive review of system data including Geographic Information System (GIS) mapping, Supervisory Control And Data Acquisition (SCADA), NorthStar billing system statistics, sewer flow analysis and allocation, elevation extraction for the model facilities based on survey data, diurnal (daytime/nighttime) pattern assignments, analysis of dry and wet weather peaking factors and model calibration based on flow monitoring data. The calibrated sanitary sewer system hydraulic model was used to perform a comprehensive capacity analysis of the sewer system under current and future conditions. These modeling simulations determined the adequacy of the system capacity under dry weather and wet weather conditions, and subsequently identified parts of the systems where improvements will be required for anticipated development. Findings The analysis found that the City’s sanitary sewer system performs exceedingly well, and there are very limited areas where the hydraulic capacity of the existing sewer system may fall short of the applicable evaluation criteria. These evaluation criteria comprise two factors used in sewer flow analysis in pipelines:  depth of flow equal to or less than half of the pipe diameter; and  average flow velocity equal to or greater than 2 feet per second. For maintenance hole performance, surcharge relates to the depth of wastewater in the 8 of 9 maintenance hole relative to the street elevation in the event of a sewage backup. Under existing conditions, approximately 1% of the system may experience a capacity shortfall. In utilizing the model to simulate future conditions, the City’s sewer system continues to perform well. In fact, under future conditions, only 3% of the modeled pipelines exceeded the evaluation depth of flow criteria (depth of flow greater than half of the pipe diameter). Although 1% existing and 3% future capacity shortfall results represent a favorable outcome of this analysis, any Sanitary Sewer Overflow which occurs can become an environmental hazard to the coastal environment. By addressing problem areas proactively, spills may be prevented and hazards avoided. The condition of the existing system and its ability to address future conditions with relatively modest investment lead to a proposed 5-year Capital Improvement Program. The annual expenditures in the proposed CIP coincide with historical $3 million per year sewer main replacement budgets. In addressing needed improvements in the immediate five-year planning horizon, capacity to serve future conditions will be in place in advance of the build-out of the DCP/LUCE. The proposed five-year CIP schedule is provided below. Description FY 2018/19 FY 2019/20 FY 2020/21 FY 2021/22 FY2022/23 Capacity Improvements $2,000,000 $1,200,000 $1,600,000 $2,000,000 Field Review Services $100,000 $80,000 Pipeline Replacements $900,000 $1,800,000 $1,400,000 $2,920,000 $1,000,000 TOTAL ANNUAL CIP $3,000,000 $3,000,000 $3,000,000 $3,000,000 $3,000,000 Capacity improvements are those projects identified in the SSSMP, which were found through the hydraulic modeling to be in need of replacement due to insufficient capacity to meet existing and/or future conditions. Field review services include projects or activities that are needed to further refine the sewer system hydraulic model from additional field investigations, in the form of facility information validation or flow verification, to confirm pipeline and maintenance hole data and obtain new information on actual sewer flow conditions in various areas of the City. The results of this effort may enable the City to reduce the identified capacity-related 9 of 9 improvements provided herein. Pipeline replacements include those pipelines identified through ongoing maintenance activities (e.g., sewer jetting and video inspections) for the annual sewer main replacement program. Financial Impacts and Budget Actions There is no immediate financial impact or budget action necessary as a result of the recommended action. Projects identified in the plan will be incorporated into future Capital Improvement Program budgets. Prepared By: Gil Borboa, Water Resources Manager Approved Forwarded to Council Attachments: A. Sanitary Sewer System Master Plan - Draft - August 2017 B. Powerpoint Presentation Sanitary Sewer System Master Plan City of Santa Monica Santa Monica, California August 7, 2017 Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | i Contents Abbreviations and Acronyms ........................................................................................................................ v Executive Summary ...................................................................................................................................... 1 1 Introduction ........................................................................................................................................ 12 1.1 Project Background ................................................................................................................. 12 1.2 Objectives and Scope of Work ................................................................................................ 13 1.2.1 Review of Historical Documents ................................................................................ 13 1.2.2 Sewage Generation and Projections .......................................................................... 13 1.2.3 Hydraulic Model Development ................................................................................... 14 1.2.4 Flow Monitoring Field Data Collection ........................................................................ 14 1.2.5 Field Survey Data Collection ...................................................................................... 15 1.2.6 Model Calibration Using Field Collected Data ........................................................... 15 1.2.7 Hydraulic Modeling Analysis ...................................................................................... 15 1.2.8 Development of a Capital Improvement Program for the Sanitary Sewer System ....................................................................................................................... 15 1.3 Data Sources ........................................................................................................................... 15 1.4 Previous Efforts and Studies ................................................................................................... 16 1.5 Report Organization ................................................................................................................ 18 2 Project Area and Background ........................................................................................................... 19 2.1 Area Description ...................................................................................................................... 19 2.2 Land Use ................................................................................................................................. 19 2.3 Climate .................................................................................................................................... 20 2.4 Projected Population Growth .................................................................................................. 22 2.5 Service Area ............................................................................................................................ 22 3 Sanitary Sewer Flows ........................................................................................................................ 24 3.1 Flow Components ................................................................................................................... 24 3.1.1 Average Dry Weather Flows ...................................................................................... 25 3.1.2 Peak Dry Weather Flows ........................................................................................... 30 3.1.3 Peak Wet Weather Flows ........................................................................................... 31 3.2 Flow Analysis .......................................................................................................................... 32 3.2.1 Existing Sewer Flows ................................................................................................. 32 3.2.2 Projected Sewer Flows............................................................................................... 34 4 Sanitary Sewer Collection System Description ................................................................................. 41 4.1 Collection System Pipelines .................................................................................................... 43 4.2 Moss Avenue Pump Station .................................................................................................... 45 4.3 Overall System Configuration ................................................................................................. 46 4.4 Hydraulic Planning Criteria ...................................................................................................... 47 5 Sanitary Sewer System Hydraulic Model Development and System Analysis ................................. 49 5.1 Overview.................................................................................................................................. 49 5.2 Existing Model Conversion ...................................................................................................... 50 5.3 Hydraulic Model Development ................................................................................................ 51 5.3.1 Physical Components of the Model ............................................................................ 52 5.4 Data Collection ........................................................................................................................ 55 Sanitary Sewer System Master Plan City of Santa Monica ii | August 7, 2017 5.5 Collection System Model Construction ................................................................................... 55 5.6 Sewer Flow Allocation ............................................................................................................. 56 5.7 Hydraulic Model Calibration .................................................................................................... 58 5.8 Project Planning Scenarios ..................................................................................................... 59 5.9 Existing Condition Hydraulic Analysis ..................................................................................... 59 5.9.1 Existing Conditions Collection System Evaluation ..................................................... 60 5.9.2 Recommended Improvements ................................................................................... 61 5.10 Build-Out Conditions Hydraulic Analysis Approach ................................................................ 76 5.10.1 Recommended Improvements ................................................................................... 76 5.11 Pipeline Condition Assessment and Renewal Projects .......................................................... 76 6 Capital Improvement Program .......................................................................................................... 79 6.1 Development of the Capital Improvement Program ................................................................ 79 6.2 Planning Level Unit Costs ....................................................................................................... 79 6.3 CIP Priority Classification ........................................................................................................ 79 6.4 CIP Prioritization Approach ..................................................................................................... 80 6.5 Recommendations for System Improvements ........................................................................ 80 6.6 Summary of Recommendations .............................................................................................. 81 6.6.1 General Recommendations ....................................................................................... 81 6.6.2 Recommendations for Model Predicted Hydraulic System Limitations ..................... 82 6.6.3 Recommendations for Condition Assessment and Renewal Projects ....................... 82 6.6.4 CIP Recommended Costs .......................................................................................... 83 Tables Table ES-1. Water to Sewer Return Ratios .................................................................................................. 3 Table ES-2. Sewer Loads Flow Projections .................................................................................................. 4 Table ES-3. Potential Capacity Related Projects ......................................................................................... 8 Table ES-4. 5-Year CIP Summary ................................................................................................................ 8 Table 3-1. Peaking Factors ......................................................................................................................... 30 Table 3-2. Peak Sub-basin Inflow/Infiltration Response ............................................................................. 32 Table 3-3. Return-To-Sewer Ratios ............................................................................................................ 33 Table 3-4. Future Planning Developments as of June 2017 ....................................................................... 36 Table 3-5. Sewer Loads Flow Projections .................................................................................................. 38 Table 4-1. Summary of Sewer Pipeline Size .............................................................................................. 43 Table 4-2. Summary of Sewer Pipeline Material ........................................................................................ 44 Table 4-3. Pipe Design Criteria ................................................................................................................... 47 Table 5-1. Water to Sewer Return Ratios ................................................................................................... 57 Table 5-2. Existing System Pipeline Recommendations (Length) .............................................................. 61 Table 5-3. Build-Out System Pipeline Recommendations .......................................................................... 76 Table 6-1.Recommended CIP Improvement Projects ................................................................................ 82 Table 6-2. 5-Year CIP Summary ................................................................................................................. 83 Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | iii Figures Figure ES-1. City Sanitary Sewer System .................................................................................................... 2 Figure ES-2. Development Project Status .................................................................................................... 5 Figure ES-3. SWIP Projected Flow Diversion and Disposal Plan ................................................................. 5 Figure ES-4. Hydraulic Model Process Flow Chart....................................................................................... 6 Figure ES-5. CIP Summary Map .................................................................................................................. 8 Figure ES-6. City Identified Replacement Pipes ........................................................................................... 9 Figure 1-1. City Sanitary Sewer System ..................................................................................................... 17 Figure 2-1. City Existing Land Use Map ..................................................................................................... 21 Figure 2-2. City Drainage Basins ................................................................................................................ 23 Figure 3-1. Components of Wastewater Flow ............................................................................................. 24 Figure 3-2. Flow Monitoring Stations .......................................................................................................... 27 Figure 3-3. Typical Normalized Diurnal Curve (Residential) ....................................................................... 29 Figure 3-4. Typical Normalized Diurnal Curve (Non-Residential) ............................................................... 29 Figure 3-5. Comparison of Water Environment Federation Infiltration Values ........................................... 31 Figure 3-6. Development Project Status ..................................................................................................... 35 Figure 3-7. Future Development Project Locations .................................................................................... 38 Figure 3-8. SWIP Projected Flow Diversion and Disposal Map .................................................................. 40 Figure 4-1. City Sanitary Sewer System ..................................................................................................... 42 Figure 4-2. City Identified Replacement Pipes ............................................................................................ 45 Figure 4-3. Moss Avenue Pump Station ..................................................................................................... 45 Figure 4-4. Overall Sewer System Configuration ....................................................................................... 47 Figure 5-1. Santa Monica's Existing Model Validation ................................................................................ 51 Figure 5-2. Hydraulic Model Process Flow Chart ....................................................................................... 52 Figure 5-3. City Sanitary System Hydraulic Model ..................................................................................... 53 Figure 5-4. Comparison of Historical Flows at SM1 ................................................................................... 58 Figure 5-5. Hydraulic Model Calibration ...................................................................................................... 63 Figure 5-6. Existing Conditions Pipeline Results ........................................................................................ 66 Figure 5-7. Existing Conditions Maintenance Holes Results ...................................................................... 68 Figure 5-8. Future Conditions Pipeline Results .......................................................................................... 70 Figure 5-9. Future Conditions Maintenance Holes Results ........................................................................ 72 Figure 5-10. CIP Summary Map ................................................................................................................. 74 Sanitary Sewer System Master Plan City of Santa Monica iv | August 7, 2017 Appendices Appendix A. 2015 Sanitary Sewer Management Plan ...............................................................................A-1 Appendix B. City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study .............B-1 Appendix C. Field Survey Locations and Data ......................................................................................... C-3 Appendix D. Model Migration Comparison Graphs .................................................................................. D-1 Appendix E. Model Calibration Graphs ......................................................................................................E-1 Appendix F. Coast Survey Data/Locations ................................................................................................ F-3 Appendix G. Future Planning Areas ......................................................................................................... G-1 Appendix H. MAPS Evaluation Report 2015 ............................................................................................. H-1 Appendix I. City’s Net Zero Ordinance ........................................................................................................ I-1 Appendix J. CIP Replacement Pipeline Candidate .................................................................................... J-1 Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | v Abbreviations and Acronyms ADWF average dry weather flow BWF base wastewater flow City City of Santa Monica CIP Capital Improvement Program CIS Coastal Interceptor System d/D depth/diameter DU DCP dwelling unit Downtown Community Plan ft Feet GIS Geographic Information System GPD gallons per day GWI groundwater infiltration HTP Hyperion Treatment Plant I/I inflow/infiltration KSF thousand square feet Los Angeles or LA City of Los Angeles LU land use MAPS Moss Avenue Pumping Station MGD million gallons per day mi Mile PDWF peak dry-weather flow PF peaking factor PWWF peak wet weather flow RDI/I rainfall-derived inflow and infiltration SSO sanitary sewer overflow SSSMP Sanitary Sewer System Master Plan WRP Wastewater Reclamation Plant Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 1 Executive Summary Background The City of City of Santa Monica (the City) contracted with HDR Engineering, Inc. (HDR) to develop its 2017 Sanitary Sewer System Master Plan (SSSMP). This Master Plan is designed to serve as a roadmap for the City to proactively manage and maintain adequate capacity of the local sanitary sewer system. The primary purpose of this planning document was to evaluate the capacity of the City’s existing sanitary sewer system under current conditions, and plan for the capacity required by future conditions associated with a number of new development projects in the City. The City is 8.25 square miles in area and has a population of approximately 93,000 (CA Dept. Finance, 2017). To provide sewer service in Santa Monica, the City has built its system to maximize the use of natural drainage and topography to convey sewage by gravity towards the ocean. The City’s sewage is collected and combined with flows from Los Angeles for discharge out of the City limits, near the intersection of Main Street and Marine Street. This final total flow is measured through a flow metering devise called SM-1. The City’s sewer system consists of a combination of gravity sewers, force mains, monitoring stations and a lift station to help convey sewage to the City of Los Angeles’ (Los Angeles or LA) Hyperion Wastewater Treatment Plant (HTP). The City’s sanitary sewer facilities include approximately 152 miles of pipelines, 2,800 maintenance holes, two permanent flow monitoring and sampling stations and one, 26 million gallons per day (MGD) pumping station, referred to as the Moss Avenue Pump Station (MAPS). The City’s system is divided into ten primary service areas or drainage basins, B1 to B10 to collect and convey sewage by gravity towards the ocean for final collection and discharge to Los Angeles for wastewater treatment and disposal. The City’s sanitary sewer system is shown on Figure ES-1. This 2017 SSSMP was prepared to reflect current growth in the City and anticipated future developments, and to provide the City with a tool for planning improvements needed for sanitary sewer collection system infrastructure. These improvements are necessary to accommodate growth within the City and will be implemented within the City’s Capital Improvements Program (CIP). Sanitary Sewer System Master Plan City of Santa Monica 2 | August 7, 2017 Figure ES-1. City Sanitary Sewer System Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 3 Current and Projected Sewer Flows Understanding current sewage generation parameters and projecting future conditions are key aspects of a sewer collection system analysis in long-range planning. Sewage generation was estimated and allocated based on water usage billing data and sewer flow data, existing and future developments, and land use specific interior and exterior water usage utility service commitments. Water usage was assigned to customer accounts based on the utility system water billing data. Estimated sewer discharges for these same customer were based on the estimated water to sewer return ratios for various customer types, such as single family residential, multi-family residential, general commercial and various institutional sub-categories. This return to sewer calculation is consistent with the City’s current methodology used to bill its customers for sanitary sewer system services. These ratios are shown in Table ES-1. Table ES-1. Water to Sewer Return Ratios City's Sewer Bill Code* Description* Approximate Number of Accounts* Water to Sewer Return Ratio SRCA Church 57 89 SRC6, SRC6A, SRC6B, SRC6C, SRC6D, SRC6E Commercial 2085 89 SRC2, SRC2LI Duplex 597 89 SRC4 Fourplex 748 90 SRC5 House meter 16 85 SRC6 Municipal 96 89 SRC5 Multi unit dwelling 3087 95 SRC9 Public school 72 89 SRC0, SRC0LI Single family 7520 51 SRCC Single family multi unit dwelling 1437 95 SRC3, SRC3LI Triplex 506 85 * Source: City billing data and sewer rate codes, excludes accounts not discharging into the City sewer system. To fully understand and plan for the capacity needs of the sanitary sewer system, future flows estimates need to incorporate the changes in sanitary flows from growth, referred to as dry weather sewage flow, and the additional water that enters the sewer system from storm-related events, referred to as wet weather flow. To account for the potential increase and changes in land use and redevelopment density, the City provided a listing of new development opportunities that are filed with the Planning Department. These development projects, including the recently adopted Downtown Community Plan (DCP), and their status in the development process are depicted graphically on Figure ES-2. Sanitary Sewer System Master Plan City of Santa Monica 4 | August 7, 2017 Figure ES-2. Development Project Status The additional sanitary sewer flow associated with these development projects are derived by correlating the applicable sewer discharge factors for the land use types and densities of each development project. Based on these factors, future average dry Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 5 weather flows are projected to increase by approximately 2.1 million gallons per day (MGD), an increase of approximately 14 percent. Approximately half of this increase is projected to occur in the DCP area. A summary of the average annual existing and future projected flows under dry weather conditions are shown in Table ES-2. Table ES-2. Sewer Loads Flow Projections Flows Existing Conditions Future Conditions Average Flows (MGD) 14.4 16.5 Note: Average annual flows shown herein exclude areas of the City that do not discharge sewage to City facilities, and the impact of other future flow reducing programs described herein. It is important to note that the City has adopted a number of activities to continue to support its sustainability goals and minimize its local footprint. Foremost among these programs is the recently adopted Water Neutrality Program and the programmatic efforts of a Sustainable Water Infrastructure Project (SWIP). Each of these programs will affect the projected overall increase in sewer flows shown in Table ES-2, and are summarized below. Water Neutrality Program In May 2017, the Santa Monica City Council adopted a Water Neutrality Ordinance to require that new development offset water use on site or off site, or alternately, pay the City an in-lieu fee to fund retrofitting of plumbing fixtures offsite. The ordinance would not allow a new development to exceed the water use of the existing development on that property. If that requirement could not be met onsite, the excess water demand would have to be offset by reducing the water demand (through fixture replacement) at other sites within the City. Given this water neutrality requirement, much if not all of the projected overall increase in future sewage flow should be offset through this growth funded plumbing fixture retrofit program. It should be noted that while this water neutrality program may offset an increase in overall sewage flows, the program does allow for an increase in flows at any specific site. With this program provision, some of the large future developments could still have a substantial point load increase in sewage discharges. To plan for this potential increase associated with these developments and to assure adequate capacity in the sanitary sewer system collection system network, the impact of site specific increases have been incorporated in the hydraulic model. Proceeding in this manner, the impact of new development is conservatively included in the system capacity assessment to reduce the risk of sanitary sewer overflows throughout the City and in the Downtown Community Plan area. SWIP – Water Reclamation Facility (WRF) The City of Santa Monica Sustainable Water Infrastructure Project (SWIP) is comprised of three elements which are integrated to provide for treatment and conjunctive reuse of brackish/saline impaired groundwater, recycled municipal wastewater, and stormwater runoff. In addition, the SWIP will help improve the water quality in the Santa Monica Bay by increasing non-point source control. The three elements of the City’s SWIP program are: • SWIP Element 1: Brackish/Saline Impaired Groundwater Reuse, Sanitary Sewer System Master Plan City of Santa Monica 6 | August 7, 2017 • SWIP Element 2: Recycled Water Production and Conjunctive Reuse, and • SWIP Element 3: EWMP Stormwater Harvesting and Reuse. It is SWIP Element 2 that has the greatest benefit to the City’s sanitary sewer system as it will be designed to recycle approximately 1 MGD of its municipal wastewater for local reuse. The planning and long-term funding of this new underground water reclamation facility (WRF) is well underway, with the final plant being sited near the Civic Auditorium. When completed, this WRF will benefit the City’s sanitary sewer system by removing approximately 1.2 MGD of sewage from the 39-inch/54-inch sewer pipelines near Ocean Avenue, and return only 0.2 MGD of sludge and brine from the WRF to an 18-inch line near Pico Blvd. and 3rd Street. The removal of the 1 MGD of flow will provide additional pipeline capacity from the WRF to the City’s outfall, and reduce the cost of wastewater treatment and disposal currently charged by the City of Los Angeles. The projected configuration of the new SWIP WRF is shown in ES-3. Figure ES-3. SWIP Projected Flow Diversion and Disposal Plan System Analysis, Findings and Recommendations An integral element of the Master Plan was the development and deployment of a temporary flow monitoring program at strategic locations throughout the City. In addition to the City’s permanent flow meter data, 12 temporary flow meters were installed. This temporary flow monitoring program was conducted in April 2016, measuring 5-minute intervals throughout the dry weather flow monitoring period at the 12 locations. Flow meter data collected by the 12 temporary meters were also used along with permanent flow meter data to develop diurnal patterns, unit generation rates, and calibration data points for the hydraulic model. Field survey services were also performed to collect elevation information that was required to develop the City’s updated hydraulic model. As part of the Master Plan, approximately 200 locations were field surveyed for the collection of elevation data for Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 7 the City’s maintenance holes and pipe inverts. This information, combined with field survey data obtained in the 2011 study, was used to improve the accuracy of the sewer system hydraulic model. To support the evaluation of the City’s sanitary sewer system for both existing and build- out conditions, a hydraulic model was developed. The hydraulic model development activities included a comprehensive review of the GIS/SCADA/Billing data, sewer flow analysis and allocation, elevation extraction for the model facilities based on survey data, diurnal pattern assignments, analysis of dry and wet weather peaking factors and model calibration based on flow monitoring data. Figure ES-4 shows the process work-flow for the hydraulic model development and system analysis. Figure ES-4. Hydraulic Model Process Flowchart The calibrated sanitary sewer system hydraulic model was used to perform a comprehensive capacity analysis of the sewer system under current and build-out conditions. These modeling simulations determined the adequacy of the system capacity under dry weather and wet weather conditions, and subsequently identified potential improvements. Capital improvement projects were identified to support the City in its planning and budgeting processes. In summary, the analysis found the City’s sanitary sewer system performs exceedingly well and there are very limited areas where the hydraulic capacity of the existing sewer system may fall short of the applicable evaluation criteria for both depth of flow in the pipeline or level of flow surcharging in a sewer maintenance hole. Under existing conditions, approximately 1% of the system may experience a capacity shortfall. In utilizing the model to simulate future build out conditions, the City’s sewer system Sanitary Sewer System Master Plan City of Santa Monica 8 | August 7, 2017 continues to perform well. In fact, under future conditions, only 3% of the modeled pipelines exceeded the evaluation depth of flow criteria. During the development of the City’s sanitary sewer system Capital Improvement Program (CIP), the recommended improvement projects were classified into the following categories: Priority 1: Facilities with model predicted capacity limitations under existing conditions scenario Priority 2A: Field verification candidates requiring additional facility information. Priority 2B: Field verification candidates requiring additional flow information. Priority 3: Facilities with model predicted capacity limitation under future conditions scenario Priority 4: Facilities identified by the City as replacement candidates and warrant additional attention or replacement under the City’s programmatic facility condition assessment and replacement program. It was determined that as a complete system, the City’s sanitary sewer collection system operates very well. The areas revealed through various hydraulic modeling analyses included capacity deficiencies that prevent the system from functioning efficiently. The projects have been categorized into the following groups: • Capacity Projects (Priority 1 and 3): These are capacity improvement projects identified in Section 5, Hydraulic Model Development and System Analysis, by evaluating the response of the collection system to existing and future conditions using the collection system hydraulic model. These findings are graphically depicted on Figure ES-5 and tabularized in Table ES-3. • System Refinement/Additional Data Collection Projects (Priority 2A and 2B): These are the projects or activities that are needed to further refine the sewer system hydraulic model from additional field investigations, in the form of facility information validation or flow verification, to confirm pipeline and maintenance hole data and obtain new information on actual sewer flow conditions in various areas of the City. The results of this effort may enable the City to reduce the identified capacity-related improvements provided herein. . These findings are included with the capacity related projects and are graphically depicted on Figure ES-5, and tabularized in Table ES-3. • Pipeline Condition Assessment and Renewal Projects (Priority 4): These condition assessment projects are identified in Section 5 to understand specifically where collection system deficiencies are located. Pipeline condition assessment and/or renewal projects include both large and small diameter pipes. The City currently budgets approximately $3 million per year for this ongoing sewer main replacement program. The City’s priority sewer main replacement projects are graphically depicted on Figure ES-6. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 9 Figure ES-5. CIP Summary Map Table ES-3. Potential Capacity-Related Improvement Projects CIP Priority Total Pipe Length (feet) Project Group CIP Year 1 (Existing Conditions Capacity Projects) 5,800 1,4 Year 1 2A (Field Facility Information Verification 3,000 2,4,5,6,7,9,10 Year 1, 2 2B (Flow Verification) 4,650 Year 3, 4 3 (Future Capacity Projects) 5,750 3,5,12,13,14,15 Year 5 Note: Refer to Appendix I for Project Group details and definitions The recommended capacity improvement-related projects include required capacity expansions of the existing system to convey future/ultimate flows under design flow conditions. The resulting capacity improvement projects are prioritized by considering the following factors: • Model-predicted overflows • Model-predicted surcharging • Reported recurring overflows Sanitary Sewer System Master Plan City of Santa Monica 10 | August 7, 2017 In addition to the capacity-related facility improvement recommendations, the City maintains an ongoing asset management program to facilitate the programmatic assessment of facility condition and replacement. Through this program, the City has identified a number of pipeline segments that warrant additional attention or are in need of replacement. The location of these pipelines are shown on Figure ES-6. Figure ES-6. City Identified Replacement Pipes The condition related improvements shown represent approximately 52,000 ft., with a cost to replace of approximately $18.3 million. As an element of the City’s Pipeline (Main) Replacement Program, these City-identified pipelines are flagged with a higher risk of failure, and should receive priority funding under the sewer main replacement program activity. Discussions with City staff suggest these improvements could be phased in over the next 12 years. It is recommended that as part of the City’s CIP, candidate projects be selected from this list based on other water main replacements/street paving projects to help the City align their replacement program with other Departments. Table ES-4 summarizes the recommended costs for the annual CIP recommendations over the next 5 years to meet the needs in the improvement categories. Of note, the 5- year CIP shown herein is designed to combine the various improvements under the currently budget $3 million per year Main Replacement Program. With no additional funding required, this improvement program could be seamlessly integrated in the City’s available CIP resources. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 11 Table ES-4. 5-Year CIP Summary Description Year 1 Year 2 Year 3 Year 4 Year5 Capacity Improvements $2,000,000 $1,200,000 $1,600,000 $2,000,000 Field Review Services $100,000 $80,000 Pipeline Replacements $900,000 $1,800,000 $1,400,000 $2,920,000 $1,000,000 TOTAL ANNUAL CIP $3,000,000 $3,000,000 $3,000,000 $3,000,000 $3,000,000 As the program moves from planning to implementation, the individual prioritization of capacity-related projects, should be correlated with other key factors in the overall prioritization process. While some of these factors may be somewhat external to the performance of the City’s Sewer Enterprise, they will influence the timing and potential cost aspects of the program’s implementation and have an influence on the level of community disruption and overall quality of life in Santa Monica. These implementation elements include spatial demand triggers that link to CIP requirements and associated development projects, inclusion of a broader infrastructure management perspective by coordinating the CIP with other projects (e. g. , underground utility and paving projects) to minimize community disruption, consideration for cost segregation so that growth pays an appropriate share of costs, and an effort to develop a leveled CIP to match the programmed improvements with capital budgeting and ratepayer affordability and acceptance. The important end-result of this planning effort is the identification of a comprehensive CIP that is: • Time-phased to support needed budgetary considerations, • Work plan based to confirm and field verify system facility data and flow conditions to maximize the use of available funds and attain operational concurrence, • Flow-based to react to specific spatial triggers for implementing "just in time" design and construction, • Holistic through the integration of the broad community infrastructure management considerations including utility pipeline replacement efforts and programmatic street management services, and • Affordable by matching the current program with the current level of capital funding and allocating these funds across the variety of improvement program activity. Sanitary Sewer System Master Plan City of Santa Monica 12 | August 7, 2017 1 Introduction This section provides an overview of the project and an outline of the Sanitary Sewer System Master Plan (SSSMP). A brief background of the project area and changing conditions, a discussion of the objectives and scope of work, a description of the report sections to follow, and a listing of abbreviations and definitions used herein are included in this section of the report. 1.1 Project Background The City of Santa Monica (City) is 8.25 square miles in area and has a resident population of approximately 93,282 (CA Dept. Finance, 2017). The City’s sewer system consists of a combination of gravity sewers, force mains, monitoring stations and a lift station to help convey sewage to the City of Los Angeles (Los Angeles or LA) Hyperion Wastewater Treatment Plant (HTP). The City’s sanitary sewer facilities include approximately 152 miles of pipelines, two permanent flow monitoring and sampling stations and one, 26 million gallons per day (MGD) pumping station. Following the 1994 Northridge Earthquake, the City completed an upgrade of approximately 80 percent of the local sewer collection system pipelines, maintenance holes and appurtenances, the complete replacement of the Coastal Interceptor System (CIS), and the Moss Avenue Pumping Station (MAPS) in 2002. In addition to collecting sewage from parcels within its corporate boundaries, the City’s system also collects pass-through flow from the City of Los Angeles, via the CIS and other small unmetered areas, and then pumps and/or conveys the sewage via gravity to the HTP for treatment and disposal. The CIS, a critical local asset, was designed to meet the City’s needs through 2090 using then current wet weather flow projections and dry weather flows at full build-out under current zoning. The CIS system is designed for 51.7 MGD at its terminus at the southern City boundary with Los Angeles (at monitoring location SM-1). Current system net flows average 10.1 MGD with total flow (including Los Angeles pass-through) averaging 14.4 MGD, as measured at SM-1. These flow volumes include both metered and unmetered flows. The City’s last sewer system modeling and analysis effort was performed in 2011. This effort established a partial sewer system hydraulic model to analyze portions of the City’s trunk system to support the inclusion of additional brine disposal from the City’s water treatment plant. Since that time, the City continues to experience many growth and system related changes. Most notable among these changes include: • new developments, such as the Downtown Community Plan (DCP), • projected increase in brine disposal from additional local water treatment plant production, • potential integration of a new local wastewater treatment plant, and • ongoing replacement and rehabilitation needs from system wear and tear. Given these changing conditions, this SSSMP provides a robust roadmap for the City by developing a comprehensive system hydraulic model to evaluate sewer system capacity Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 13 that is required to meet current and projected growth, planning for the containment of rainfall dependent water that enters the sewer system during storm events, identifying the infrastructure improvements required to meet these needs, and developing a Capital Improvement Program (CIP) that defines where and when these capital investments are required. 1.2 Objectives and Scope of Work This SSSMP has been developed to assist the City in achieving its objective of managing and maintaining the City’s sewer system for its existing and future customers. The scope of work for this SSSMP included the following primary tasks. 1.2.1 Review of Historical Documents Existing information and previous studies were reviewed to understand the existing sewer system performance and the projected future system requirements. The following data and reports were reviewed: • Collection System Model Construction and Hydraulic Analysis 2011; • Sewer System Flow Monitoring Program 2010, & 2011; • Locations in the existing sewer system with hydraulic issues as identified by City staff; • Operation of SCADA operated lift stations run time data (dry weather and wet weather) and lift station pumping records (total flow pumped per month) and flow monitoring locations data; • Existing system permanent flow monitoring and sampling data for SM1, MAPS and LA1; • Existing City GIS system including gravity sewer and force mains for model conversion; and • Previous Sewer Collection System Hydraulic Model. • City’s 2015 Sewer System Management Plan (SSMP) details of which can be found in Appendix A. 1.2.2 Sewage Generation and Projections Understanding current sewage generation parameters and projecting future conditions are key aspects of a sewer collection system model and its use in long-range planning. Sewage generation was estimated and allocated based on water usage billing data, existing and future population, existing sewer flow data, and land use specific interior and exterior water usage utility service commitments. Usage was estimated based on the existing data and different user type: residential, commercial and industrial etc. water to sewer return ratios. Future dry weather sanitary sewage flow was based on City predicted development and future commitments. Based on information from the City planning staff, an ultimate build-out model scenario based on density and land use was developed. This coverage was developed to also support uniformity with future long-range water use planning projections. Sanitary Sewer System Master Plan City of Santa Monica 14 | August 7, 2017 1.2.3 Hydraulic Model Development The model development activities included a comprehensive review of the existing model configuration and operation and incorporating modifications to reflect changes that have taken place in the system or system operations since the last master plan. The updated model will be capable of evaluating changes in projected sanitary sewer flows, and the impacts of improvements to the collection system. Operational improvements were made to the model based on new data on operation of lift station and on improved sewer flow allocation, diurnal pattern assignments, physical layout, and peaking factors (PFs). The model development steps included: • Verifying the GIS system is updated and includes all sewer service areas and any additional new sub-basins; • Conducting an elevation data survey to obtain ground and sewer invert elevation data on major trunk gravity sewer lines; • Building all facilities into the model and accurately representing their existing system operation; • Appropriately distributing sewage flows based on current sewer generation data and development of base sewer flow, per capita flows and wet weather flow scenarios; • Establishing an appropriate PF using available operational data; • Establishing infiltration factors to be applied throughout the system; • Identifying various diurnal demand patterns for different land use to accurately represent the variation in flow generation throughout the day; • Identifying a design storm and resulting hydrograph to accurately represent wet weather flow input values; and • Establishing existing and future scenarios within the model for identifying existing and future system needs. 1.2.4 Flow Monitoring Field Data Collection In addition to the permanent flow meter data, 12 temporary flow meters were installed at select locations throughout the City’s collection system. This temporary flow monitoring program was conducted in April 2016, measuring 5-minute intervals throughout the dry weather flow monitoring period at the 12 locations. Data collected over this flow monitoring period, along with previous flow monitoring data collected in 2010 and 2011, were used in the development of the hydraulic model and provide calibration information for the SSSMP. The detailed flow monitoring report is provided in Appendix B. This report includes depth, velocity and quantity hydrographs as well as daily tabular reports for the metering period at each of the 12 metered locations. These locations were chosen to represent sub areas within the system, so that flow characteristics from different demographic areas within the service area could be analyzed and flows could be attributed to locations within the collection system to a greater degree of accuracy than would be possible if only the permanent flow meter data were used. Flow meter data collected by the 12 temporary Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 15 meters were also used along with permanent flow meter data to develop diurnal patterns, unit generation rates, and calibration data points for the hydraulic model. 1.2.5 Field Survey Data Collection Feild survey services were performed to collect elevation information that was required to develop the City’s updated hydraulic model. As part of the Master Plan, approximately 200 locations were field surveyed for the collection of elevation data for the City’s maintenance holes and pipe inverts. This information, combined with field survey data obtained in the 2011 study, was used to improve the accuracy of the sewer system hydraulic model. Detailed information about the locations, data collected, elevation extraction approach etc. are provided herein covered in Appendix C of this report. 1.2.6 Model Calibration Using Field Collected Data Following the review of the model configuration and necessary modifications to model inputs, the hydraulic model was calibrated. The calibration process is a result of data collected from the collection system that reflects actual operation including flow monitoring and elevation data. The data was used to compare model predictions to field conditions and to adjust model parameters such as, flow factors, rainfall-dependent infiltration/inflow (RDI/I) factors, pump operations, and wet weather peaking factors (PFs) if necessary to better reflect the existing sewer system operations and performance. An operational review with City staff was conducted to verify that the model results agree with the system’s historical performance per their knowledge and experience. 1.2.7 Hydraulic Modeling Analysis The updated and calibrated sanitary sewer system hydraulic model was used to perform a comprehensive capacity analysis of the current sewer system. These modeling simulations determined the adequacy of the system under both current and projected future dry weather and wet weather conditions, and subsequently identified potential improvements. Using the calibrated model, operational scenarios were created that utilize the existing system configuration. These scenarios were evaluated to identify potential current or future capacity limitations in the City’s sewer infrastructure. Capital improvement projects were identified to support the City in its planning and budgeting processes. 1.2.8 Development of a Capital Improvement Program for the Sanitary Sewer System Following the review of all the available documents, reports, data, and modeling results, final recommendations were developed. This task defined the recommended plan for system improvements, and how they will be incorporated into the City’s CIP. Project costs and a CIP prioritization matrix were developed. 1.3 Data Sources City staff supplied several reports, studies, previous planning documents and other sources of information in preparation of this SSSMP. Other material was obtained from Sanitary Sewer System Master Plan City of Santa Monica 16 | August 7, 2017 sources such as Department of Finance-Census Bureau, Environmental Systems Research Institute, Inc., City of Santa Monica Water Resources Division, Finance Department, Planning Department and Public Works/Engineering, United States Geological Survey, National Oceanic and Atmospheric Administration, Southern California Association of Governments. Pertinent materials included system maps, planning and development information, historical records, billing data and details on facility information, climate data, and population projections were also obtained. Several meetings were held with City staff to review and collect the data used to prepare this plan. Extended interactions were held with the City's staff during the hydraulic model development and calibration stages to incorporate their knowledge of systems, facilities, and operational information. 1.4 Previous Efforts and Studies Reports on the sanitary sewer system in Santa Monica were compiled and reviewed in preparation for this study. Santa Monica's sanitary sewer system is illustrated in Figure 1-1. Some of the more useful reports that are referenced in this study include those recently completed by, B&V Hydraulic Analysis for Brine-line analysis, SSMP and GHD. A summary of the related reports include: • In 2010, the City commissioned the development of an Asset Management Plan for the water distribution and sanitary sewer collections systems. This study assessed the organization and management of the Operations and Maintenance functions of the Water Resources Division • In 2011, the City commissioned the development of a hydraulic model of the City’s sewer trunk system and a hydraulic analysis of these pipelines to confirm the hydraulic capacity under current flow conditions. • In 2012, the City developed a Sewer System Management Plan (SSMP) Appendix A. This study assessed various aspects of the City’s sewer utility systems, including organization, operations and maintenance, overflow response plan, system evaluation and capacity assurance plan, SSMP audits, and water quality monitoring program. e Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 17 Figure 1-1. City Sanitary Sewer System Sanitary Sewer System Master Plan City of Santa Monica 18 | August 7, 2017 1.5 Report Organization The following sections of this SSSMP describe the background, existing and future systems, sanitary sewer flows, land use and population information, hydraulic model development and calibration, system evaluation and finally recommended system improvements. • Section 1, Introduction - presents a brief overview of the background, scope of work, and data sources used in preparing this report. • Section 2, Project Area and Background - presents the study area, land use, demographics and climatic conditions within the City’s service area. • Section 3, Sanitary Sewer Flows - focuses on the analysis of the City's historical water usage trends and sanitary sewer flows, the impact of wet weather on sewage flows, inclusion of updated land use and new development information, and the projection of these values in the future. • Section 4, Existing System Facilities - identifies the infrastructure and operational details of the existing sanitary sewer systems and documents planning and evaluation criteria that establishes the framework for model development and system analysis. • Section 5, Hydraulic Model Development and System Analysis - documents the model development process and performs the analysis of the system under existing and future conditions. This section also presents the planning and evaluation criteria used to evaluate the system performance. The modeling results are presented for the modeling scenarios developed during the hydraulic model development. • Section 6, Recommendations – Lists the recommended system improvements needed and establishes the CIP needed for the City’s sanitary sewer system. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 19 2 Project Area and Background This section presents the details about the City’s sewer system service areas, basin description, land use, and other details for the project area. 2.1 Area Description The City is located in western Los Angeles County, California, USA. With Santa Monica Bay to the west, the City is surrounded by City of LA communities — Pacific Palisades on the northwest, Brentwood on the north, West Los Angeles on the northeast, Mar Vista on the east, and Venice on the southeast. The City rests on a mostly flat slope that angles down towards Ocean Avenue and towards the south. High bluffs separate the north side of the City from the beaches. The City is 8.25 square miles in area and has a population of approximately 93,000. The Santa Monica Water Resources Division is responsible for all water-related assets that support the safe treatment and distribution of potable and recycle water within the City, as well as the collection and conveyance of all sanitary and stormwater runoff to protect the community from sewer system overflows (SSOs), local flooding and support sustainable overall water quality in Santa Monica Bay. The City provides water and sanitary sewer services to approximately 93,000 residents. Sewage from the City’s customers is collected by a system of sewers and conveyed to the Los Angeles trunk sewer. Ultimately, this sewage is discharged to Los Angeles’ Hyperion Treatment Plant (HTP) for treatment and disposal. The City’s local collection system serves a sewered area of approximately 5,400 acres. There are approximately 150 miles of sewer main, a 26 MGD lift station (MAPS), 2,800 maintenance holes, two permanent flow monitoring stations. Because of changes in growth experienced in the last few years and anticipated similar trends, sanitary sewer system planning is important to ensure adequate collection and conveyance facilities are available to accommodate future growth in the City while delivering the desired level of service to existing utility system customers. 2.2 Land Use In terms of Land Use (LU) classification, single family and multi-family residential are the City’s predominant user type. In addition to this residential land use, the City also has centralized business, a commercial district, and institutional and industrial areas. Sanitary Sewer System Master Plan City of Santa Monica 20 | August 7, 2017 Figure 2-1 shows the City’s existing land use map and geographic boundary. It is expected that future changes in growth and LU classifications will result from re- development of the existing parcels since almost all of the City’s area is at near built-out conditions. An important element of this redevelopment is the recent adoption of Downtown Community Plan (DCP). The specific details and flow implications of the recently adopted DCP are further discussed in Section 3. 2.3 Climate The City rests on mostly flat terrain that slopes down towards the west and towards the south. The north side of the City is separated from the beaches by the high bluffs. Classified as a moderate Mediterranean climate, Santa Monica enjoys an average of 310 days of sunshine a year. Because of its location, nestled on the vast and open Santa Monica Bay, morning fog is common in May, June and early July (caused by ocean temperature variations and currents). Summers are dry with an average temperature of about 70 degrees Fahrenheit, and winters are cool and wet with an average temperature of about 52 degrees Fahrenheit. The beach temperatures tend to be about 5 to 10 degrees Fahrenheit (3 to 6 degrees Celsius) cooler than it is inland. September tends to be the warmest month of the year. The City's average rainfall is approximately 14 inches. The rainy season is from late October through late March. Winter storms usually approach from the northwest and pass quickly through Southern California. There is very little rain during the rest of the year. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 21 Figure 2-1. City Existing Land Use Map Sanitary Sewer System Master Plan City of Santa Monica 22 | August 7, 2017 2.4 Projected Population Growth According to the United States Department of Finance, the 2017 residential population of the City is approximately 93,282 persons. Given the near build-out condition, population growth in the City’s service area has been minimal, approximately 0.12 percent since 1990, as estimated in the City’s Urban Water Management Plan. However, over the planning horizon reflected in the City’s updated LUCE and including the Downtown Community Plan (DCP), new estimates project the future population to be approximately 102,730. This estimate of population change was implicitly included in the Master Plan future flow projections based on the spatial increase in Dwelling Units (DU) provided by the City’s Planning Department. A more detailed discussion of the projection of sewage flow, non-residential growth, specific development project areas, and the DCP are provided in Section 3. 2.5 Service Area Sewer collection systems are typically designed to collect sewage from established service areas or drainage areas that are defined by: 1) natural contours and geographic conditions that favor drainage towards a certain location, 2) existing collection system infrastructure that separates one area from another, or 3) undeveloped areas planned to be served by a connection to a certain location. To provide this sewer service in Santa Monica, the City has built its system to maximize the use of natural drainage and topography to convey sewage by gravity towards the ocean. There, the City’s sewage is collected and combined with flows from Los Angeles for discharge out of the City limits, near the intersection of Main Street and Marine Street. The ten primary service areas or drainage basins are delineated as basins B1 to B10, and are shown on Figure 2-2. Note that a portion of the Basin B10 is directed into the City of LA’s sewer system and was excluded from the City’s flows, as modeled in earlier studies carried out by the City. No further change to the service area delineation or basin/sub basin configurations were identified or recommended during the model development phase of this project. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 23 Figure 2-2. City Drainage Basins Sanitary Sewer System Master Plan City of Santa Monica 24 | August 7, 2017 3 Sanitary Sewer Flows The projection of future sanitary sewer flows determines the future capacity requirements of the sewer collection system and, subsequently, drives the sewer improvements needed to be included in the City’s CIP. Sewer flow forecasts consider projected changes in LU classifications, population, employment, and interior water conservation program activities. The procedure for developing these flows for the City’s baseline and future conditions is described in this section of the Master Plan. The typical components of sewage flows are described in Section 3.1, along with the development of current dry and wet weather flow data. Existing and future flows are described in Section 3.2. 3.1 Flow Components In general, wastewater flows can be divided into three components: base wastewater flow (BWF) or sanitary flow, groundwater infiltration (GWI), and RDI/I. These three components are illustrated in Figure 3-1. Dry weather flow consists of only BWF and GWI while wastewater in wet weather conditions may consists of all three components. The wet weather flow component (i.e., RDI/I) is of particular importance because it is the increased portion of flow that occurs during a rainfall event, and can be the primary component that drives sewer system capacity requirements in urbanized areas. Figure 3-1. Components of Wastewater Flow GWI Sanitary Baseflow Slow Impervious RDII Fast Impervious RDII Pervious RDII Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 25 Baseflow (BWF) is domestic sewage from residential, commercial, and institutional (schools, churches, hospitals, etc.) sources, as well as industrial sources. It is affected by the population and land uses in an area and varies throughout the day in response to personal habits and local business operational activity. BWF typically follows a repetitive daily diurnal pattern. GWI is defined as groundwater entering the collection system through defective pipes, pipe joints, and maintenance hole walls. Unlike BWF, GWI is typically a relatively constant flow throughout the day but may vary seasonally. The magnitude of GWI depends on the depth of the groundwater table above the pipelines, the percentage of the system that is submerged, and the physical condition of the sewer system. GWI is distinct from wet weather induced flows in that GWI occurs even under dry weather conditions. RDI/I refers to stormwater that enters the collection system in direct response to the intensity and duration of rainfall events. As the name suggests, RDI/I is made up of inflow and infiltration. Rainfall-dependent inflow is rainfall runoff that directly enters the collection system through illicit stormwater connections and maintenance hole defects. The flow response to inflow is usually relatively rapid, with flows following rainfall patterns closely. Rainfall-dependent infiltration occurs when groundwater in saturated soils leaks into the collection system through cracks in pipes, leaky joints, and similar defects. Infiltration usually occurs slowly, peaking after peak rainfall and taking hours or days to recede. Factors that affect the characteristics of RDI/I can include age, material, and construction quality of the collection lines, local soil properties, and the permeability characteristics of the overlying ground cover, typically derived by its LU classification. The dry weather and wet weather flow data are incorporated in the hydraulic model using two distinct input parameters. These parameters are base flow and flow pattern. The base flow element of flow is a constant load that is applied to all maintenance holes (also known as manholes, utility holes, or access holes) in the collections system. In contrast, the flow pattern is assigned as a sewage discharge configuration or characteristic to each maintenance hole, representing a time based multiplier against the base flows. 3.1.1 Average Dry Weather Flows Existing average dry weather flow (ADWF) was determined by using flow monitoring data to analyze the dry days only. A dry day is defined as a day when no rainfall occurred 72 hours prior to that day and when there were no lingering effects from a previous rainfall. The average hourly dry-weather flow rate for each of the flow meters reflects the dominant LU that drains to each meter. ADWF diurnal patterns were derived from hourly flow data recorded by the City’s permanent and temporary flow monitors or meters installed in the sanitary sewer collection system. As discussed previously, ADWF are comprised of the BWF (with diurnal variations) and the GWI. Further discussion of each of these components is presented in this section. Dry Weather Base Flow Development Flow monitoring data along with water meter billing data provided by the City was used to calculate the dry weather BWF. The City has three permanent flow monitoring locations: LA1, SM1 and MAPS. In addition to these permanent flow meters, 12 temporary flow Sanitary Sewer System Master Plan City of Santa Monica 26 | August 7, 2017 meters were installed at select locations throughout the collection system to provide actual field measured data to support a basis of planning for this master planning program effort. These temporary flow meters were installed from April 16 through 24 in 2016 to measure sewage flow during both weekday and weekend conditions. The temporary flow meters took measurements in 5-minute intervals throughout the day. During this monitoring period, no rainfall was recorded in the City, resulting in a dry weather flow monitoring period at each of the 12 locations. In addition to the 2016 flow monitoring locations, previous flow monitoring data was used as part of this study as well. The City awarded flow monitoring contracts previously to V&A in 2010 and 2011 to monitor sanitary sewer data for six sites during dry and wet weather conditions. For each of the meters, 24 hour, 15-minute interval flow monitoring data was obtained. Statistical analysis of the flow monitoring data was performed to define the existing average and peak dry weather flow (ADWF and PDWF), and peak wet weather flows (PWWF). For details on the flow monitoring locations and data refer to Appendix B. The location of the various temporary flow meters is shown in Figure 3-2. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 27 Figure 3-2. Flow Monitoring Stations Sanitary Sewer System Master Plan City of Santa Monica 28 | August 7, 2017 The City-provided water billing data was obtained to provide recorded monthly water usage from January 2013 to December 2016 for each billed water meter in the City. The BWF was calculated by averaging the monthly winter metered water consumption for each meter (excluding landscape/irrigation only and fire accounts) for the 4-year billing period. Only water usage for the winter months (January, February and March) was considered since there is typically very little irrigation demand in winter, and virtually all of the applicable billed water usage can be assumed to enter the collection system as sanitary sewer flow. The winter months’ average daily flows were calculated from the monthly metered totals. All of the applicable metered data were then totaled and compared to the average daily dry weather flows (no rainfall recorded) measured at the SM1 Outfall for the same time period. The difference between the two values was assumed to be GWI and was proportioned evenly over all the meters or system accounts as an element of the City’s ADWF. Diurnal Curve The hourly sewer generation pattern is a diurnal curve in which the flow for each hour of the day can be expressed as a ratio to the daily total flow rate. The curve applied to the City’s collection system was obtained based on the sewer generation diurnal curve of a typical residentially dominated urban city of similar size. Figure 3-3 shows sample diurnal curves that represents the flow coefficient at 1-hour intervals. It is important to note that this curve describes the generation at the point of entry into the collection system. It does not represent the timing of flows at the downstream wastewater treatment plant, which usually lags behind the collection system by several hours. Typical residential flow patterns show increased sewage discharges in the early morning and late evening associated with bathing and meals delayed by the travel time to the flow meter during weekdays and a later pattern and slightly higher flows during the weekends, as shown in Figure 3-3. For non-residential users, peak flows typically occur around noon due to activities in commercial and industrial areas. Weekend flows are significantly lower than weekday flows for most non-residential users as shown in Figure 3-4. Similar curves associated with various LU classifications were imported into the model and assigned as a sewage discharge pattern to each maintenance hole for the associated LU in the collection system, representing a multiplier against the dry weather BWF. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 29 Figure 3-3. Typical Normalized Diurnal Curve (Residential) Figure 3-4. Typical Normalized Diurnal Curve (Non-Residential) Sanitary Sewer System Master Plan City of Santa Monica 30 | August 7, 2017 Infiltration Factor GWI makes up a portion of the dry weather flow and is typically measured by examining the minimum night-time flows in the collection system when most BWF would be very low. The calculated GWI of 0.45 percent was applied to each metered flow total to calculate the ADWF. Wet Weather Flows Wet weather flow is flow that directly enters the collection system through illicit stormwater connections and maintenance hole and pipe defects resulting from a rainfall event. In 2011, flow monitors are installed in the collection system to measure flow during monitored rainfall events. This wet weather flow data was reviewed with City staff and was determined to be representative of the existing sanitary sewer collection system as minimal system changes have occurred since that time. This data was then applied to each catchment basin within the City’s service area and uniformly and/or proportionally added to a unique maintenance hole. 3.1.2 Peak Dry Weather Flows To calculate peak dry weather flows (PDWF), ADWF was used and multiplied by an appropriate PF. The peak dry factor was established based on the data gathered during the conduct of the 2016 Sewer Flow Monitoring Program. To create the PDWF scenario, which models the peak flow experienced in the collection system under dry conditions, the BWF component is peaked to account for the variation in sewer generation that occurs over the course of a typical day. This peaking is accomplished by applying diurnal curves to the BWF. Because the sewer generation patterns vary for residential and non-residential sources, as previously shown in Figure 3-3 and Figure 3-4, both of these diurnal curves were used in the development of the City’s sanitary sewer system hydraulic model. Based on the flow monitoring data collected from the various basins during the 2016 Sewer Flow Monitoring Program, PFs, as shown in Table 3-1, were established. Table 3-1. Peaking Factors Site Manhole ADWF Peak Measured Peaking (MGD) Flow (MGD) Factor FM1 10-254 0.394 0.76 1.9 FM3 11-330 0.128 0.26 2 FM4 11-363A 7.205 10.92 1.50 FM6 17-711 0.894 1.48 1.7 FM7 31-1481 0.105 0.26 2.40 FM9 31-1529 0.977 1.75 1.80 FM10 40-1974 0.585 1.04 1.80 FM11 46-2249 0.91 1.51 1.70 FM12 47-2282 0.0052 0.0296 5.60 Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 31 Table 3-1. Peaking Factors Site Manhole ADWF Peak Measured Peaking (MGD) Flow (MGD) Factor FM13 7-115A 1.228 2 1.60 FM14 7-149A 1.191 2.37 2.00 FM16 7-165A 8.86 15.76 1.80 Note: Where Flow Monitor (FM) number is the Temporary Flow Monitoring station number 3.1.3 Peak Wet Weather Flows Peak wet weather flow (PWWF) is estimated as PDWF plus RDI/I and BWI, combined as a single inflow/infiltration (I/I) value herein. RDI/I is storm water that enters the wastewater collection system in direct response to the intensity and duration of individual rainfall events. RDI/I may recede gradually after a storm; however, any residual flow is considered to be a general increase in GWI. The results of the 2011 wet weather flow monitoring program performed for the City is shown in Figure 3-5. As shown, the actual field measured results at these six sites compared to the Water Environment Federation “typical” low-to-ADWF ratios indicates the City’s sanitary sewer system had an insignificant rainfall-dependent infiltration and GWI response, as a result of residual flows. Figure 3-5. Comparison of Water Environment Federation Infiltration Values To create the PWWF scenarios, the model was loaded using PDWF values, and RDI/I, combined as I/I, was added to the PDWF. The total volume of I/I was then averaged out across the City and multiplied accordingly to each pipeline based on its length-diameter. This value, referred to as inch diameter mile (IDM) is a common method of normalizing wet weather responses among sewer drainage basins with differing length and drainage areas. The respective I/I value was then added to the calculated BWF per time period for PWWFs. The peak I/I response for the six sites monitored during the wet weather monitoring period is provided in Appendix B and summarized in Table 3-2. Sanitary Sewer System Master Plan City of Santa Monica 32 | August 7, 2017 Table 3-2. Peak Sub-basin Inflow/Infiltration Response Site Manhole Design Storm Peak I/I Response (MDG) ADWF Basin Pipe Length Peak I/I Response per ADWF Peak I/I Response per IDM (MGD) Flow (MGD) (IDM) (In MGD per MGD of Basin ADWF) (In MGD per IDM of Basin Pipe) Site 1 11-333 5.57 0.98 214.7 5.57 0.026 Site 2 11-332 4.99 0.99 515.2 4.99 0.010 Site 3 11-331 2.48 0.62 81.40 2.48 0.019 Site 4 11-352 2.32 4.18 320.5 2.32 0.030 Site 5 12-378 4.44 0.67 84.70 4.44 0.035 Site 6 Unknown 4.24 1.18 383.30 4.24 0.013 3.2 Flow Analysis Sewer flows within the City are collected by City-owned facilities and conveyed to the HTP operated by Los Angeles for treatment and disposal. This sub-section describes the approach for quantifying sewer flow rates for existing and projected conditions through year build-out. To incorporate appropriate growth conditions, this master plan utilized data from the adopted General Plan, the 2015 amended Land Use and Circulation Element, the Southern California Association of Governments population projections, the Downtown Community Plan, and data, discussions, and spatial projections from the City’s Planning Department. The flow projections were made for the baseline conditions and build-out time horizons. Existing flow was calculated from the City’s historical water billing data, various temporary sewer flow monitoring program data since 2011, and ongoing data from the City’s permanent flow monitoring meter stations. Future flow projections were developed based on information provided by the City’s Planning Department on changing LU and development conditions and combined with appropriate LU-based sewer unit duty factors developed as part of this Master Plan. 3.2.1 Existing Sewer Flows As previously discussed, a permanent flow meter (LA-1) at the north end of the City measures the sewage from Los Angeles that passes through Santa Monica by way of the CIS. Flows exiting the City are measured with a permanent flow meter (SM-1) at the south end of town as discussed in detail in Section 4 and shown in Figure 4-4. Existing flows were calculated using water billing data received from the City for the period 2013-2014. This data was deemed as most appropriate by City staff as representative of existing conditions. Winter water consumption for each applicable billing account was developed based upon the average usage over the two years. Water billing accounts were matched to assessor’s parcel numbers through geo-coding using GIS. These geo-coded parcels were assigned to catchment areas or basins based on the configuration of the City’s ten sewer basins. The geo-coding process matched Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 33 approximately 95 percent of the water accounts, which accounted for 98 percent of the total water consumption within the City. In addition to the billing records, prior and new sewer flow monitoring data was obtained at various locations throughout the City. Using these spatial data sets, a return-to-sewer ratio was calculated on a per Land Use (LU) basis. These return-to-sewer factors were then applied to the spatial geo-coded account data and calibrated to permanent and temporary flow data collected during the various flow monitoring periods to align with the City’s existing flow conditions, and mass balance with the readings obtained from the City’s outfall meter, SM-1. This process provided a good spatial representation of the quantity of sanitary sewage and wet weather induced swage flow in the City. ADWF, or base flow, is domestic (or sanitary) flow from residential, commercial, and institutional (schools, churches, hospitals, etc.) sources, plus industrial sewage. For this Master Plan, the City’s estimated sewer flow is derived by multiplying water demands by return-to-sewer ratios based on LU. The ADWF duty factors were calculated using return-to-sewer ratios, as described in Table 3-3. Table 3-3. Return-To-Sewer Ratios Water to Sewer Return Ratios Sewer Bill Code Description Number of Accounts Current Ratio Modeled Ratio Recommended Ratio SRCA Church 57 89 89 89 SRC6, SRC6A, SRC6B, SRC6C, SRC6D, SRC6E Commercial 2085 89 89 89 SRC2, SRC2LI Duplex 597 89 89 89 SRC4 Fourplex 748 90 90 90 SRC5 House meter 16 85 80-90 85 SRC6 Municipal 96 89 89 89 SRC5 Multi unit dwelling 3087 95 95 95 SRC9 Public school 72 89 89 89 SRC0, SRC0LI Single family 7520 51 50-55 51 SRCC Sf multi unit dwelling 1437 95 95 95 SRC3, SRC3LI Triplex 506 85 85 85 * Source: City billing data and sewer rate codes, excludes accounts not discharging into the City sewer system. Sewer generation factors or duty factors for residential were expressed in MGD per dwelling unit (DU) and/or gallons per capita per day, while duty factors for the remaining LU classifications were expressed in GPD per 1,000 square feet (KSF). Approximately 80-85 percent of the City’s calculated average base flow can be attributed to single family and multifamily LU types. The remaining flow is attributed to schools, commercial, industrial, government/office/public institutions, and miscellaneous non-residential. Sanitary Sewer System Master Plan City of Santa Monica 34 | August 7, 2017 3.2.2 Projected Sewer Flows The 2017 SSSMP sewer flows were projected for buildout conditions based on a combination of data sources. These data sources and findings were discussed with the City’s Planning Department and Water Resources Division and were used as the spatial basis of planning for future flow projections. Of particular importance was the integration of the City’s DCP, as its vision is to continue to revitalize and transform the City’s downtown area to a destination location. The DCP and other new development area data provided by the City Planning Department are provided in Table 3-4. These data were spatially incorporated into the overall LU coverage to support the development of future sewage flow projections and are shown in Figure 3-6. Figure 3-7 shows the status of the future development projects based on the various categories listed in the figure. Upon the direction received from the City, sewer generation factors from the City of LA were used to calculate the future loads for the new development provided by the City’s Planning Department, based on approved residential dwelling units (DUs) or non-residential projects, in thousand square foot (KSF) units. Note that Table 3-4 shows only the “Approved” and “Final” projects as listed by the City’s Planning Department, as of July 2017. For a comprehensive list including “Pending” and “Under Construction” projects, refer to Appendix G. In the development of this Master Plan, analyses were performed to validate the sewage-flow generation factors for representative LU throughout the City’s service area based on flow monitoring data. Unit flow factors were developed for various land-use categories and were used to generate the flow per loading unit for use in the sewer collection system model. Based on comparison with flow monitoring data, most LU generation rates were considered acceptable, and closely mirrored unit factors developed in previous studies of the City’s sanitary sewer system, as well as factors used by Los Angeles in their planning and contractual cost recovery programs. The future estimates aligned with the City’s Land Use & Circulation Plan, which was provided in GIS format. As discussed the projected flow estimates were developed by determining a unit generation factor and applying that factor to the floor area of the parcel or the number of dwelling units for residential uses. These factors were developed to reflect individual point sources where the exact nature and use of the site are known. To simplify the flow development and allocation process, composite factors were developed wherever possible. Proceeding in this manner will provide the City with a more streamlined ability to update this data in future studies. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 35 Figure 3-6. Development Project Status Sanitary Sewer System Master Plan City of Santa Monica 36 | August 7, 2017 Table 3-4. Future Planning Developments as of June 2017 Future Planning Developments No Project Address Street Net New Units 1 Residential 2316 3rd Street 2 DU 2 Five-unit Condominium 947 4th Street 5 DU 3 Three-unit condo 1919 4th Street 1 DU 4 Five-unit Condominium 914 5th Street 5 DU 5 Mixed Use DA 1317 7th Street 57 DU Mixed Use DA 1317 7th Street 2.6 KSF 6 Senior Housing (affordable) 1514 7th Street 26 DU 7 Residential 1827 9th Street 2 DU 8 Eight-unit Condominium 1444 11th Street 2 DU 9 Five-unit Condominium 1533 11th Street 2 DU 10 Eight-unit Condominium 1837 12th Street 4 DU 11 Six-unit Condominium 1434 14th Street 5 DU 12 Media Production 1523 14th Street 7.414 KSF 13 Five-unit Condominium 943 16th Street 3 DU 14 11-unit Condominium 1803 16th Street 10 DU 15 Residential (five condominiums/one low income) 1807 17th Street 4 DU 16 Six-unit Condominium 1949 17th Street 6 DU 17 Senior Housing (affordable) FAME 1753 18th Street 15 DU 18 Three-unit Condominium 1927 18th Street 2 DU 19 New Science Building Crossroads 1731 20th Street 20.45 KSF 20 Industrial 1645 21st Street 1 KSF 21 Residential 1236 25th Street 1 DU 22 Eight-unit Condominium 2323 28th Street 6 DU 23 Mixed Use 702 Arizona Ave 49 DU 24 Mixed Use (Sway Building) 525 Broadway 125 DU 25 St. Monica School Expansion (also 1030 Lincoln) 725 California Ave. 11.887 KSF 26 Affordable Housing (Step Up on Fifth) 520 Colorado 34 DU 28 Six-unit Condominium 1171 Franklin Street 6 DU Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 37 Table 3-4. Future Planning Developments as of June 2017 Future Planning Developments No Project Address Street Net New Units 29 Apartments 1541 Franklin Street 5 DU 30 45-unit Affordable Condominium 1943-59 High Place 38 DU 31 Residential/retail building 207 Hollister 1 DU 32 Edison Elementary School 2425 Kansas 65 KSF 35 Two-story commercial 3204 Lincoln Blvd 2.853 KSF 36 Retail/Office 2321 Main St. 2.9 KSF 38 Four-story residential 1112-1122 Pico Blvd 32 DU 39 Three-unit Condo 1127 Princeton 2 DU 40 Pico Branch Library 2200 Virginia Avenue 7.5 KSF 41 Six-unit Condominium 1319 Yale Street 1 DU 42 Civic Center Specific Plan Colorado to north, Pico to south, 4th to east, Ocean to west 318 150.2 DU KSF 43 15-unit Condominium (Turtle Villas) 1211 12th Street 13 DU 44 Parking Structure 6 Rebuild 1431 2nd Street 350 spaces 47 Mixed Use DA 1415-1423 5th Street 64 DU 48 Mixed Use affordable housing 1437 5th Street 43 DU 49 500 Broadway DA (Fred Segal) Site 500 Broadway 309 DU 22.997 KSF 50 Mixed Use DA (Denny's site) 1560 Lincoln Blvd 100 DU 9.402 KSF 51 Mixed Use DA (Norm's site) 1601 Lincoln Blvd 90 DU 6.448 KSF 52 Mixed Use DRP (Aarons brothers) 1641 Lincoln Blvd 78 DU 55 Cadillac Mixed Use Development (Los Angeles) 12101 West Olympic Blvd 516 DU Sanitary Sewer System Master Plan City of Santa Monica 38 | August 7, 2017 Figure 3-7. Future Development Project Locations The projected ADWF under current future conditions are shown in Table 3-5. As shown, the ultimate flow has been projected to increase approximately 14 percent from existing flows up to 16.5 MGD. Table 3-5. Sewer Loads Flow Projections Flows Existing Conditions Future Conditions Average Flows (MGD) 14.4 16.5 Other Projected Sewer Flow Considerations It is important to note that the City has a number of other programs and projects underway to enhance sustainability in Santa Monica. Two such programs are: Net Zero Ordinance, and Sustainable Water Infrastructure Program (SWIP). The breadth and implications of these two programs/projects on the sanitary sewer collection system capacity are briefly summarized herein. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 39 Water Neutrality Ordinance On May 23, 2017, the Santa Monica City Council adopted a Water Neutrality Ordinance to require that new development offset water use on site or off site, or alternately, pay the City an in-lieu fee to fund retrofitting of plumbing fixtures offsite. The ordinance would not allow a new development to exceed the water use of the existing development on that property. If that requirement could not be met onsite, the excess water demand would have to be offset by reducing the water demand (through fixture replacement) at other sites within the City. Given this water neutrality requirement much if not all of the projected overall increase in future sewage flow should be offset through this growth funded plumbing fixture retrofit program. Additional details on the City’s Water Neutrality Ordinance can be found in Appendix I. It should be noted that while this water neutrality program may offset an increase in overall sewage flows, the program does allow for an increase in flows at any specific site. With this program provision, some of the large future developments could still have a substantial point load increase in sewage discharges. To plan for this potential increase associated with these developments and to assure adequate capacity in the sanitary sewer system collection system network, the impact of site specific increases have been incorporated in the hydraulic model. Proceeding in this manner, impact of new development is conservatively included in the system capacity assessment to reduce the risk of sanitary sewer overflows throughout the City and in the Downtown Community Plan area. SWIP – Water Reclamation Facility (WRF) The City of Santa Monica Sustainable Water Infrastructure Project (SWIP) is comprised of three elements which are integrated to provide for treatment and conjunctive reuse of brackish/saline impaired groundwater, recycled municipal wastewater, and stormwater runoff. In addition, the SWIP will help improve the water quality in the Santa Monica Bay by increasing non-point source control. The three elements of the City’s SWIP program are: • SWIP Element 1: Brackish/Saline Impaired Groundwater Reuse, • SWIP Element 2: Recycled Water Production and Conjunctive Reuse, and • SWIP Element 3: EWMP Stormwater Harvesting and Reuse. It is SWIP Element 2 that has the greatest benefit to the City’s sanitary sewer system as it will be designed to recycle approximately 1 MGD of its municipal wastewater for local reuse. The planning and long-term funding of this new underground water reclamation facility (WRF) is well underway, with the final plant being sited, as shown in Figure 3-8, near the Civic Auditorium. When completed, this WRF will benefit the City’s sanitary sewer system by removing approximately 1.2 MGD of sewage from the 39-inch/54-inch sewer pipelines near Ocean Avenue, and return only 0.2 MGD of sludge and brine from the WRF to an 18-inch line near Pico Blvd. and 3rd Street. The removal of the 1 MGD of flow will provide additional pipeline capacity from the WRF to the City’s outfall, and reduce the cost of wastewater treatment and disposal currently charged by the City of Los Angeles. The projected configuration of the new SWIP WRF is shown in Figure 3-8. Sanitary Sewer System Master Plan City of Santa Monica 40 | August 7, 2017 Figure 3-8. SWIP Projected Flow Diversion and Disposal Map Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 41 4 Sanitary Sewer Collection System Description The City’s sanitary sewer collection system consists of approximately 150 miles of pipelines (both gravity and force-mains), approximately 2,100 maintenance holes, a 26 MGD MAPS and its appurtenances, two flow monitoring stations and a system outfall station. The City’s service area is divided into ten sub-basins. The approximately 150 miles of pipeline vary in size from 4 inches to 70 inches in diameter and approximately 2,800 City maintenance holes. In addition to providing sewer services to City customers, the local sewer system collects pass through flow from Los Angeles, which is metered through LA-1. This combined flow is then pumps and / or conveyed via gravity south to Los Angeles for treatment at Los Angeles’ HTP. Figure 4-1 shows the City’s sanitary sewer system. Sanitary Sewer System Master Plan City of Santa Monica 42 | August 7, 2017 Figure 4-1. City Sanitary Sewer System Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 43 4.1 Collection System Pipelines The City’s sewer system consists of a various pipe types, sizes, ages and material. Based on the information contained in the GIS database of the collection system, pipe sizes and materials were compiled for the City’s collection system. The City’s collection system network model was created using the GIS features converted into an InfoSewer network. The collection system GIS information is summarized in the tables below. Table 4-1 presents a summary of the pipe sizes in the collection system. As shown, the City’s gravity collection system consists of pipes of varying sizes from 4 inches to 72 inches. All pipelines greater than 8-inch were represented in the trunk- sewer hydraulic model. Table 4-1. Summary of Sewer Pipeline Size Diameter (in)* Length (ft)* Percentage of Total Length 4 262.76 0.03 6 48,009.90 6.21 8 480,194.64 62.09 10 64,192.37 8.30 12 38,487.86 4.98 14 2,849.97 0.37 15 28,583.76 3.70 16 43.89 0.01 18 23,941.50 3.10 20 2,848.43 0.37 21 11,101.01 1.44 24 16,901.53 2.19 27 7,861.86 1.02 30 14,038.29 1.82 33 2,050.81 0.27 36 5,846.09 0.76 39 4,360.24 0.56 42 479.09 0.06 48 341.90 0.04 54 6,197.68 0.80 60 5,000.98 0.65 72 172.09 0.02 Unknown 9,582.92 1.24 773,349.57 100.00 Source*: City’s GIS database as of August 2016 Sanitary Sewer System Master Plan City of Santa Monica 44 | August 7, 2017 A summary of the pipeline information sorted by material is shown in Table 4-2. As shown, the vast majority of the City owned pipelines are made from vitrified clay pipe (VCP). Vitrified clay pipe accounts for approximately 85 percent, or 120 miles, of the installed pipeline material in the City. The majority of the remaining pipelines are constructed of plastic or polyvinyl chloride material (PVC), which includes VCP relined with a PVC liner. Table 4-2. Summary of Sewer Pipeline Material Pipe Material* Length (ft)* Percentage of Total Length Polyvinyl chloride (C900) 620.69 0.08 Polyvinyl chloride (C905) 135.13 0.02 Concrete Cast 3,007.78 0.39 Ductile Iron Pipe 819.91 0.11 High Density Polyethylene 12,741.27 1.65 Polyvinyl chloride 64,746.70 8.37 Reinforced Concrete Pipe 12,340.88 1.60 Unknown 3,338.19 0.43 Vitrified Clay Pipe 659,331.39 85.26 VYLON 16,266.37 2.10 Totals 773,349.57 100.00 Source*: City’s GIS database as of August 2016 As part of the model development, a spatial coverage was added to the pipeline attributes which consisted of pipelines identified by the City as candidates suitable for replacement. This coverage was developed using information provided by the City staff on their pipelines having high risk of failure from an operational and condition standpoint and deemed structural improvements. These are facilities under the City’s condition assessment and replacement program, which the City has identified as pipeline segments that warrant additional attention or are in need of replacement. The spatial location of these pipelines is shown on Figure 4-2. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 45 Figure 4-2. City Identified Replacement Pipes 4.2 Moss Avenue Pump Station MAPS is a sewer pump station owned by the City. MAPS is a critical component of the CIS, which moves sewage along the coast from northern Los Angeles, through Santa Monica, and eventually to the Hyperion Treatment Plant. MAPS is the City’s single most critical sewer utility asset as it is located in very close proximity to the Santa Monica Pier, as shown in Figure 4-3.. Figure 4-3. Moss Avenue Pump Station Source: Moss Avenue Pump Station Evaluation Report 2015. Sanitary Sewer System Master Plan City of Santa Monica 46 | August 7, 2017 Per the MAPS 2015 evaluation report, the pump station is equipped with two discharge force mains. To‐date, this pump station has predominantly used a single forcemain for all discharge. Utilizing both force mains, MAPS’ firm capacity (three duty pumps running) has been field measured at 27.6 MGD discharging through a dual force main configuration. The maximum capacity (four pumps running) has been field measured as 36.9 MGD discharging through dual force mains as per the MAPS Evaluation Report 2015. Detailed information for the MAPS, junction boxes, gauging stations and siphons was obtained from Operations and Maintenance and As-Built Drawings. This detailed information of MAPS is provided in Appendix H. Detailed information for the two junction boxes and siphon are also including in the sanitary sewer collection system model inventory. Dimensions for each junction box and siphon box were collected to determine the storage capacity available. 4.3 Overall System Configuration The Coastal Interceptor Sewer (CIS) system within the City receives flow from two sources: 1. Los Angeles north of Santa Monica 2. Local City of Santa Monica sewage collection system As stated previously, the City’s sanitary sewer collection system service area, consists of 150 miles of pipelines, 2,800 maintenance holes, two flow monitoring stations and one pump station (MAPS), and is divided into ten sewage drainage basins. Of the 10 basins, only Basin 1 (B‐1) discharges into the CIS upstream of MAPS. The other 9 basins discharge into the CIS downstream of the MAPS facility. The majority of the flow entering MAPS comes from the City of LA, north of Santa Monica, and a smaller portion (less than 5 percent) of the flow comes from the Santa Monica sanitary sewer collection system (those properties along PCH). An overview of the CIS system upstream and within Santa Monica is shown in Figure 4-4. The general basin configuration and key monitoring and sampling locations within the SM System are also shown, and highlighted below. • LA‐1 – Sewer Metering Station located along Pacific Coast Highway within the City, monitoring flow from the City of LA into the CIS (provided by the City of LA). • SM‐1 – Sewer Metering Station located on Main Street, near Marine Street within the City, monitoring combined flow from the City of LA and Santa Monica (provided by the City). Together, these two flow metering stations are used as the basis of the City’s flow and strength cost allocations for wastewater treatment and disposal by Los Angeles. With the exception of some minor boundary connections, Santa Monica’s total sewage flows and loads are derived by subtracting LA-1 values from metered values at SM-1. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 47 Figure 4-4. Overall Sewer System Configuration Source: Moss Avenue Pump Station Evaluation Report 2015. 4.4 Hydraulic Planning Criteria Evaluation of a sanitary sewer collection system during dry and wet weather conditions involves evaluation of both capacity and general operational issues. The capacity of the system is primarily controlled by population and significant commercial/industrial dischargers. Operational issues that may lead to inadequate level of service system performance include roots, fats, oils and grease. The hydraulic model is an important utility management tool to assist in identifying locations of capacity constraints or velocity concerns that may exist in the existing system, or are projected to arise under future dry or weather flows. The primary design criteria to be used to evaluate potential pipe capacity or operational problem areas are shown in Table 4-3. Table 4-3. Pipe Design Criteria Parameter Value Minimum Velocity 2 feet per second Manning’s Roughness Coefficient (N) 0.013 Force Main Velocity 3-5 fps Minimum Pipe Size 8-inch PWWF Depth/ Diameter (d/D) < 0.75 d/D Sanitary Sewer System Master Plan City of Santa Monica 48 | August 7, 2017 As noted in Table 4-3, the common metric associated with managing capacity is depth of flow during dry and wet weather events. Depth of flow in relation to pipe diameter, or depth-to-diameter (d/D) ratio is an element of the City’s existing design criteria and is used herein to identify potential capacity problems within the system, which may result in sewer overflows. A wet weather assessment of the sanitary sewer system is focused on the elimination of wet weather overflows for a particular design storm event. Design storms are primarily defined by their duration and the return period. Duration is the amount of time over which a rain event occurs, where the return period is a measurement of the likelihood a particular event will occur. For example, a 5-year storm will theoretically occur once every 5 years. Since the selection of the design storm can have a significant impact on determining the adequacy of system capacity, this design criteria driven level of service element of the Master Plan had careful consideration in this planning effort. Based on discussions with City staff, the design storm selected to be incorporated in the hydraulic model simulation is a 10-year 24 hour event. This design criterion is also used by City of LA in the assessment of its sewer system hydraulic capacity analysis programs to contain peak wet weather flows in the sewer design to avoid SSOs. A discussion on the development and use of the City’s hydraulic model is provided in the subsequent section of this report. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 49 5 Sanitary Sewer System Hydraulic Model Development and System Analysis This section discusses the development of the hydraulic model of the City’s sanitary sewer system that was used for system analysis and the identification of areas with potential hydraulic limitations. The findings of the hydraulic model evaluations are also covered under this section of the report. This includes the system evaluation under both existing and future build-out conditions. The areas identified with potential capacity limitations have then been compiled, and existing and future system improvement recommendations developed to resolve these potential sewer system limitations. These recommendations are provided in the next section of this report. 5.1 Overview The purpose for constructing the collection system model and performing the hydraulic analyses was to assess the performance of the existing sewer system, evaluate the spatial impact of future growth and wet weather events on that system, and recommend improvements that may be needed to meet both existing and future conditions. The goal of the hydraulic model development and hence system evaluation was to: • Determine additional infrastructure requirements for resolving current hydraulic capacity limitations, • Confirm that acceptable hydraulic conditions will be maintained in the system during peak dry and wet weather conditions, and • Confirm that adequate capacity will remain to accommodate future sewer flow projections in response to change in growth described in earlier Sections of this report. The City’s sanitary sewer collection system was modeled using the InfoSewer Version 7.6 software by Innovyze. The InfoSewer software is capable of simulating all aspects of the City’s sanitary sewer collection system through a hydraulic model network. A hydraulic model network is a mathematical representation of the collection system represented by a series of nodes and links. Nodes represent maintenance holes, storage basins, wet wells, junction boxes, and outfalls. Links, as the name implies, represent any hydraulic structure connecting two nodes. Sanitary sewer pipelines, force mains, lift stations, weirs, and gates are all represented by links in this model. During the conduct of hydraulic simulations, the model considers the available storage at these hydraulic elements (through filling and draining) and is capable of simulating unsteady state flow conditions under both open channel and surcharged conditions for varying time periods. Additionally, this model allows simulation of single path and multiple path flow networks, backwater curves, flow reversals, pumps, weirs, siphons, gates, orifices, parallel pipes, and other diversion structures necessary to simulate a sanitary sewer system, such as the City's. The process of model development and hydraulic analysis involved several steps. These were: 1. Conversion of the City’s existing modeling software (InfoWorks CS) to InfoSewer Software. Sanitary Sewer System Master Plan City of Santa Monica 50 | August 7, 2017 2. Validation and comparison of results between the InfoWorks and InfoSewer Software. 3. Update of the collection system network, consisting of pipes, maintenance holes, hydraulic structures, pumping stations, etc. 4. Spatial allocation of current and future sewer flows, based on water billing data, to system maintenance holes. 5. Model calibration to Dry Weather conditions to reflect actual daily flow patterns under dry weather conditions. 6. Hydraulic analyses using the validated model to simulate existing and future hydraulic conditions. Hydraulic distribution models are frequently used for the planning, design and operational management of sanitary sewer collection systems. In order to evaluate system hydraulics, computerized modeling software is used to develop hydraulic models that represent actual distribution system infrastructure and its operation using complex mathematical equations. These models serve as tools to identify potential deficiencies or capacity limitations, size future facilities and support long range capital improvement planning studies. As described above, the hydraulic model is the primary analytical tool used to determine facility sizing and capacity needs. 5.2 Existing Model Conversion To begin the model development process, the City’s existing sanitary sewer system model was converted from the InfoWorks CS modeling platform (version 12) to the InfoSewer modeling platform, both software packages are Innovyze products. Per the scope of this project, only the existing system dry weather flow scenario was converted to InfoSewer. Following conversion, the model was validated by comparing output from the original InfoWorks model to output from the converted InfoSewer model at 22 locations. For various reasons, including the different calculation engines used by the software packages, no automated conversion from InfoWorks to InfoSewer is available. However, several import/export features are available in the software packages, and were utilized to facilitate the model conversion process. Modeled system infrastructure, including gravity mains, force mains, and maintenance holes was exported from the InfoWorks CS model to shapefiles. The shapefiles contained spatial information and the physical collection system information needed for hydraulic simulations, such as invert elevations, and pipe diameter, length, material, and roughness factors. These shapefiles were then imported to the new InfoSewer model. MAPS pump station information was entered into the InfoSewer model manually including wet well location and dimensions and pump curves and operational logic. The sluice leading to the wet well at the MAPS pump station was represented in InfoSewer as a gravity main with equivalent diameter. Dry weather flows and diurnal flow patterns were copied out of the InfoWorks model and into the InfoSewer model via Excel spreadsheets. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 51 Once the model was converted to the InfoSewer software, model validation was performed to contrast the outputs from the two software to ensure accuracy in the model conversion process. Figure 5-1 shows examples of the model validation results. A graphic comparison of all model validation sites are provided in Appendix D. Figure 5-1. Santa Monica's Existing Model Validation 5.3 Hydraulic Model Development The collection system model was built using the InfoSewer software. InfoSewer is a well know tool for GIS-based sanitary and storm sewer collection systems analysis. The program has the capability of performing a wide variety of modeling tasks designed to help engineers predict the response to various flow conditions and physical constraints, and suggests sizes for replacement and relief pipes where additional pipeline capacity is required. The program can also be effectively used for I/I studies. This section describes how InfoSewer models the physical objects composing a sewer collection system as well as its operational parameters and the computational methods used to simulate its hydraulic behavior. Figure 5-2 describes the process flow chart for the development of the City’s sanitary sewer system model. Sanitary Sewer System Master Plan City of Santa Monica 52 | August 7, 2017 Figure 5-2. Hydraulic Model Process Flow Chart 5.3.1 Physical Components of the Model The hydraulic model, as shown in Figure 5-3, conceptualizes a sewer collection network as a collection of links connected together at their endpoints, called nodes. The nodes represent maintenance holes, wet-wells, and outlets while the links represent pipes and pumps. The sewer system can be of any topological configuration and can contain multiple loops and outlets. The following sewer network components were modeled: Maintenance Holes Maintenance holes are points in the network where links join together and where loads enter the network. They are also placed at locations where pipe characteristics change (e.g., diameter and slope). Maintenance holes represent points in the sanitary sewer system where loads enter into the system. Maintenance holes are normally located at places where pipes connect and where pipe characteristics such as diameter and slope change. The basic input data for maintenance holes used in the development of the model was: • The rim elevation , i.e. the top elevation of the maintenance hole structure • The diameter of the maintenance hole structure • The baseline load at the maintenance hole Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 53 Figure 5-3. City Sanitary System Hydraulic Model Sanitary Sewer System Master Plan City of Santa Monica 54 | August 7, 2017 The maintenance hole depth to pipe and rim surface elevation parameters are used in the determination of maintenance hole surcharge and flooding. The loads on the system, i.e., wastewater flows collected, accumulated and conveyed by the collection system are assumed to be positive in the model. Maintenance holes can have their load vary with time and different types of loading (e.g., low density residential, medium density residential, high density residential, industrial, commercial, etc.) can be assigned to them. Outlets Outlets designate discharge points (e.g., treatment plant, ocean outfall) where flows exit the system and are the most downstream points of the collection system. These nodes define the discharge end or the most downstream element of a sewer network. Wet Wells Wet wells are structures in the collection system that collects sewage flows before they are pumped into force mains for transport to another gravity system. These are nodes with storage capacity that can vary with time during an extended period simulation. The primary input properties for wet wells are: • The bottom elevation where the level is assumed to be zero • The minimum level, i.e., the lowest allowable level above the bottom elevation • The maximum level, i.e., the highest allowable level above the bottom elevation • The initial level above the bottom elevation • The wet-well diameter Wet-wells operate within their minimum and maximum levels. A wet-well can be modeled as a constant diameter (cylindrical) where a representative diameter is specified as the diameter corresponding to the average wet-well area. Pipes Pipes are links that convey sewage from one point in the network to another. Pipes are closed conduits and are commonly used in sanitary sewer systems and combined sewer systems. These are circular conduits by which flow is transported either by gravity (i.e., gravity mains) or by the energy supplied from pumps (i.e., force mains). The principal hydraulic input parameters for conduits are: • The conduit connectivity, i.e. from and to node IDs • The upstream and downstream invert elevations • The conduit length representing the distance between nodes • The conduit diameter or depth, top or bottom width, left side slope, and right side slope • The Manning roughness coefficient for gravity (open-channel) mains or the Hazen-Williams coefficient for force (pressurized) mains Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 55 Pumps Pumps are devices that raise the hydraulic head of water through the sanitary sewer system. A pump is a link that imparts energy to a fluid thereby raising its hydraulic head. Pumps are needed in a sewer system to prevent deep excavations, and are designed to lift the fluid to a desired level that produces gravity flow condition further downstream. The relationship describing the head gained to a fluid as a function of its flow rate through the pump is defined as the pump characteristic curve. 5.4 Data Collection At the onset of the study, available data was gathered for the sanitary sewer collection system’s physical facilities. The data included the following sources: • Geographic Information Systems (GIS) Database: Current GIS system files detailing maintenance holes, gravity collection lines, force mains, lift stations and flow metering or outfall locations were acquired for model inputs. • City Records: City data such as billing records, and permanent sewer flow metering data was configured in the model. • SCADA Data for system facilities • Dry weather flow monitoring performed in April 2016 • Field Elevation Data: Data collection performed for approximately 200 City locations • Field Survey Data: A partial field survey of the sewer collection system was completed. Invert data for major trunk gravity lines was used for model input. • Rainfall Data: Rainfall data obtained from two rain gauges located within the City was used to evaluate infiltration/inflow parameters in the model. • Interpolations: Vertical control data, such as pipe inverts, was interpolated between known locations where necessary. • Personal Communication with City Staff: The institutional knowledge of City staff was used to configure the model as needed. 5.5 Collection System Model Construction The primary source of information provided by the City was the GIS data for the sanitary sewer system network. Since InfoSewer is compatible with ArcGIS software, the City’s GIS data was directly imported into the sewer system model. Model inputs for pipelines included length, diameter, material and roughness. Pipeline lengths were automatically calculated in the model software based on the geographical length. The resulting sewer model network consists of approximately 150 miles of pipe, including gravity collection lines and force mains. The model network also includes approximately 2,800 maintenance holes. Note that the model base network consists of all maintenance holes and pipelines in the City’s sanitary sewer network. Model inputs for maintenance holes included invert elevations and sewage flows or loads. The focus of the model loading however was to facilitate an assessment of the main trunk lines under both existing and future conditions. Sanitary Sewer System Master Plan City of Santa Monica 56 | August 7, 2017 Additional pipelines and maintenance holes were included to the main trunk network model as necessary. These small 8-inch and under segments were chosen to be included as they provided hydraulic connectivity and to provide a framework for load allocation in portions of the City which are primarily sewered with only smaller pipelines. The resulting collection system model is shown on Figure 5-3. Model inputs for the lift stations included wet well size, number of pumps, pump head discharge curves, and pump on and off levels as provided by the City. The aging and wearing of pump components were not considered in the model. Once the model network was established, a series of data checks were performed to verify the accuracy of the source model data. Potential errors evaluated during data validation included elevation datum checks, downstream pipes smaller than upstream pipes, reverse slope pipes and pipe crowns above ground level. When these potential errors were identified, data was checked against paper mapping and operational knowledge, and was corrected as appropriate. These system data checks were performed to ensure that the modeled system was properly connected (upstream and downstream maintenance holes are correct) and that missing data was identified and resolved. 5.6 Sewer Flow Allocation Evaluation of sewer system flows is a fundamental element in assessing the infrastructure requirements for the project area. For the City’s SSSMP, sewer flows were calculated based on the historic water usage data, population and LU projections, GIS areal coverages, and discussions with City staff. As noted in Section 3, the general approach used in the SSSMP for the evaluation of sewer flow discharges was based on two primary scenarios. These were: Current and Build-out (worst case scenario) conditions. For the calculation of sewer flows, sewage generation rates were derived for various land use types, generally categorized as residential and non-residential classes. Residential flow projections were based on population, dwelling units (DUs), and per-capita unit flow factors. Non-residential flows were calculated based on each parcel size and the associated sewer generation factors developed from water billing records. The following components were integral for the calculations of the sewer flows for the current and future scenarios. Water to Sewer Return Ratios Generally, the development of land-use based sewer generation factors can be estimated from field generated flow measurement and mass loading calculations. The City’s actual potable water billing consumption data for each LU category was used to predict sewer discharge rates based on water to sewer return ratios for the system. The amount of water estimated to return to the sewer was assumed to be the amount which would be collected through the sanitary sewer system during dry weather conditions. Since most of the water usage data represents both interior and exterior demand, not all of the water usage is converted to sewer flow. To estimate sewage flows, potable water usage billing information was evaluated to segregate between interior and exterior water usage. This segregation was derived by developing water to sewer return ratios and applying these rations on an account-level basis to establish the sewer loadings for each Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 57 area. The adjustment factors needed to convert total parcel level water usage to that portion that is discharged to the sanitary sewer system is typically referred to as the return to sewer ratio. Table 5-1 describes the return-to-sewer ratios that were derived during the flow allocation elements of the master planning tasks (also covered in Section 3, Table 3-4). Table 5-1. Water to Sewer Return Ratios City's Sewer Bill Code* Description* Approximate Number of Accounts* Water to Sewer Return Ratio SRCA Church 57 89 SRC6, SRC6A, SRC6B, SRC6C, SRC6D, SRC6E Commercial 2085 89 SRC2, SRC2LI Duplex 597 89 SRC4 Fourplex 748 90 SRC5 House meter 16 85 SRC6 Municipal 96 89 SRC5 Multi unit dwelling 3087 95 SRC9 Public school 72 89 SRC0, SRC0LI Single family 7520 51 SRCC Single family multi unit dwelling 1437 95 SRC3, SRC3LI Triplex 506 85 * Source: City billing data and sewer rate codes, excludes accounts not discharging into the City sewer system. The water to sewer ratios shown in Table 5-1 are developed to represent the conversion from total water use to indoor water use only, which is essentially equal to the amount of sewage discharged. Since summer irrigation is the main use of potable water that does not return to the sewer, water usage in the winter months is generally recognized as good indicator of account level sewer flows, with approximately 80 to 90 percent of the water usage used being used for interior water needs. In addition to the development of applicable water as returned to sewer rations, it is important to note that the total flow into a sanitary sewer system flow has two main components: sanitary or dry-weather flows and wet-weather or rainfall dependent flows. These flows are identified from system knowledge of the local area LU patterns, sewage generation characteristics, inflow and infiltration characteristics, external tributary flows, etc. Sanitary or dry-weather flows are results from human activity and are defined as the flow that exists in the sanitary sewer collection system during rainless periods. This flow is composed of domestic, commercial, industrial, and institutional type sewage. The sanitary flows are the basic data required for any hydraulic modeling computation. In contrast, wet-weather flow is that flow that is directly related to rainfall activity. Sanitary Sewer System Master Plan City of Santa Monica 58 | August 7, 2017 Wet-weather flows consists of ground water infiltration (GWI), which is the extraneous flow entering the sewer system from below the ground through construction defects, pipe corrosion and pipe joint failures or breaks, and rainfall related inflow that typically enters the sewer system through maintenance hole covers, basement drains and other sources. The development of current and future flows incorporated both dry-weather and wet- weather conditions in this sanitary sewer system master planning effort. Figure 3-6 shows the model baseline flows compared to the overall historical flows for SM1. As seen in the figure below the model baseline scenario, which was based on 2013-2014 system billings, compares well with the SM 1 flows for that time frame. Figure 5-4 shows a comparison of the flows at SM1. Figure 5-4. Comparison of Historical Flows at SM1 5.7 Hydraulic Model Calibration Model calibration is the process by which the flows established in the computerized hydraulic model are compared with actual system flows measured in the field. Iterative adjustments are made to the sewage-flow generation factor volumes, the diurnal curves, or the physical model until the model’s predicted hydrographs closely represent the actual observed flows. The primary purpose of model calibration is to assure that the resulting hydraulic model provides an accurate representation of the hydraulic characteristics of the collection system so that it can be confidently used as the basis of future modeling and system improvement decisions. The calibration goal is for the model to represent the measured flows within a 10 percent margin. The results of the calibration process are illustrated in Figure 5-4- and Figure 5-5, with details of the model calibration process and results are provided in Appendix E. As shown, the comparison of the measured flows at the flow monitoring locations and the modeled flows have a strong correlation, suggesting the updated hydraulic model will be a valuable tool for the City in the evaluation of its sanitary sewer system. 12.5 13 13.5 14 14.5 15 2012 2013 Model Baseline Flow 2014 2015 2016 Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 59 5.8 Project Planning Scenarios As previously discussed, the City’s SSSMP was developed based on assessment of sewage flows under both existing and build-out planning conditions. The basis of planning for these two planning scenarios is described below. Existing System Scenario: Baseline The “existing” scenario corresponds to the existing conditions development conditions for the year baseline years 2013-2014. This baseline data set was selected by the City as it reflects the most recent historical high demand years. This time frame was also selected to align with the City’s water conservation program baseline. The baseline demands were adjusted, to account for changes in the sewer flows to current loads as represented by the permanent flow meter data, as part of the existing scenario Build-out Planning Scenario This planning scenario is based on the City's population projections ultimate build-out conditions. The buildout scenario considers the City’s projected buildout condition as established in its Land Use and Circulation Element (LUCE), and other growth and development information such as the Downtown Community Plan (DCP). The buildout scenario considers the planned LU zones at buildout and applies sewer generation factors to the population and non-residential densities for each LU zone. The development of the projected flows at buildout was previously described in Section 3. 5.9 Existing Condition Hydraulic Analysis The purpose of a sanitary sewer system is to collect sewer flow from various origins in the City and convey these flows to a designated point of discharge. The maximum and minimum flow rates in any given day can vary, but generally follow some typical daily diurnal patterns for residential and non-residential customers. The sanitary sewer system should be designed to carry the maximum rate within an acceptable range of velocity without the sewer system backing up during these peak daily flows. In contrast, the sewer system should also have adequate flows and velocity to convey the minimum flow without deposition of suspended solids during the minimum daily time periods, which is typically in the middle of the night. The City’s hydraulic model was developed to effectively simulate the system’s hydraulic behavior at specific time period and analyze its performance under various flow conditions. The InfoSewer model uses steady-state simulations in its hydraulic analysis calculations for the analysis of utility sewer systems. For a steady-state analysis, all flows are assumed to accumulate in the system and discharge only at the outlets. This means that even if a pipe has a flow beyond its maximum capacity, the flow is still carried downstream including through pumps and force mains so that full/maximum flow conditions are carried through to all affected downstream facilities. The transition between gravity flow and pressurized flow is also ensured by assuming that all flows are transported through each force main, subject to the upstream hydraulic control. The hydraulic evaluation of the City’s existing collection system was performed using the collection system model developed as described earlier and is explained in this section. Sanitary Sewer System Master Plan City of Santa Monica 60 | August 7, 2017 The existing system evaluation applies current sewage flows to applicable spatial locations in the system and incorporates current infrastructure configurations and applicable operational strategies, typically associated with pump stations, force mains and diversion structures. A sanitary sewer collection system has basically two main functions: to convey the designed peak discharge and to transport solids so that deposits are kept to a minimum. It is imperative; therefore, that the sanitary sewer has adequate capacity for the peak flow and that it functions at minimum flows without excessive maintenance and odor generation. The existing system scenario takes into consideration the current flows in the existing infrastructure, both under dry and wet weather conditions. The existing scenario incorporates all facilities in the existing sanitary sewer system including gravity mains 10- inch in diameter and greater (and all 8-inch mains directly upstream from 10-inch mains), maintenance holes, lift stations, pumps, force mains, and the outfall station located at SM-1. For the dry weather scenario, sewer flows are loaded to each node in the system based on the summation of account-level tributary sewer flows, as derived from water consumption data. To simulate wet weather conditions stemming from infiltration and inflow, a peaking factor (PF) was applied to the dry weather loads at all nodes in the sewer system network. This wet weather PF is calculated as the ratio between the average day flows and the flows that occur on the day out of the year when the highest flows are recorded during a particular wet weather event. 5.9.1 Existing Conditions Collection System Evaluation An understanding of the hydraulic condition of the existing system is essential to identify existing system related capacity limitations and to help prioritize recommended system improvements resulting from the ultimate system capacity analysis. The InfoSewer hydraulic model developed as a part of this Master Plan was used to perform the capacity analysis of the existing collection system. The capacity analysis was performed for various existing flow scenarios including existing average, peak dry weather, and peak wet weather flow scenarios. Improvements are identified based on the evaluation of the existing system during the peak hours of wet weather conditions. The capacity analysis performed herein is consistent with generally accepted methods and is based on the consideration of the depth of flow with respect to the diameter of the pipe. A capacity limited section along a pipeline is identified as a potential capacity related improvement project if the depth to diameter (d/D) ratio exceeds the criteria established to define system performance during the designated wet weather flow scenario conditions. The hydraulic model constructed for this study was used to evaluate performance of the collection system using the criteria for d/D ratio and velocity for gravity pipes, and surcharge depth for maintenance holes. Under existing dry and wet weather flow conditions, a large majority of the City’s sewer collection system pipelines have excess or reserve capacity. The existing hydraulic modeling simulation identified approximately 1 percent of the total sanitary sewer pipeline system had d/D ratios greater than the 0.75 criteria. This finding indicates the City’s sewer system has available capacity in the majority of the local sewer system. The Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 61 “d/D ratios” for the collection system are calculated by the InfoSewer hydraulic model under both dry and wet weather conditions. Similarly, the hydraulic analysis of the depth of sewage within the maintenance hole structure indicated that the majority of these structures fell within the evaluation criterion for surcharge depths. Maintenance hole surcharge depths are calculated by the hydraulic model under both dry and wet weather conditions. The above mentioned d/D ratio and MH figures are shown on Figure 5-6 and Figure 5-7, respectively. Potential high risk areas for surcharging are shown in the above figures. As noted from the hydraulic system analysis, the City’s sanitary sewer system operates well under current conditions, with minimal potential areas of capacity limitations. 5.9.2 Recommended Improvements Recommended improvements for the gravity pipelines with current capacity limitations are based on the capacity needed to collect and convey projected future peak wet weather flows per the design criteria discussed in Section 4. Proceeding in this manner, needed improvements are sized for future conditions, minimizing overall City costs and community disruption during construction. Note that existing improvements are then compared with buildout improvements in Section 5.10 for final recommendations, as shown in Figure 5-10. The recommended improvements are summarized in Table 5-2 by pipe diameter and length. These include either upsizing pipe diameters to increase current capacity or field verify facility configurations (pipeline and maintenance holes) including invert elevation or pipe flow evaluation/monitoring to validate system configuration. Table 5-2. Existing System Pipeline Recommendations (Length) Diameter (inches) Total Length (feet) Comment 15 2800 Upsizing Pipe Recommended 18 1800 Upsizing Pipe Recommended 12 3198 Field Verification Recommended 8 2015 Field Verification Recommended Sanitary Sewer System Master Plan City of Santa Monica 62 | August 7, 2017 This page is intentionally blank. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 63 Figure 5-5. Hydraulic Model Calibration Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 65 This page is intentionally blank Sanitary Sewer System Master Plan City of Santa Monica 66 | August 7, 2017 Figure 5-6. Existing Conditions Pipeline Results Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 67 This page is intentionally blank Sanitary Sewer System Master Plan City of Santa Monica 68 | August 7, 2017 Figure 5-7. Existing Conditions Maintenance Holes Results Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 69 This page is intentionally blank Sanitary Sewer System Master Plan City of Santa Monica 70 | August 7, 2017 Figure 5-8. Future Conditions Pipeline Results Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 71 This page is intentionally blank Sanitary Sewer System Master Plan City of Santa Monica 72 | August 7, 2017 Figure 5-9. Future Conditions Maintenance Holes Results Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 73 This page is intentionally blank. Sanitary Sewer System Master Plan City of Santa Monica 74 | August 7, 2017 Figure 5-10. CIP Summary Map Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 75 This page is intentionally blank. Sanitary Sewer System Master Plan City of Santa Monica 76 | August 7, 2017 5.10 Build-Out Conditions Hydraulic Analysis Approach This sub-section of the report identifies the build-out analysis approach and sewer system improvements required to convey the projected buildout flows as previously discussed. To evaluate the buildout sanitary sewer system, the GIS and existing system hydraulic model were updated to include planned improvements and recommendations proposed for the existing collection system to determine the sewage these areas would contribute in the future. Using the InfoSewer model, the buildout sewer system was evaluated under average dry weather flow and peak wet weather flow conditions to identify areas with potential capacity limitations according to the established design criteria. Similar to the existing condition, the analysis indicated the City’s system continued to perform well under these future conditions, with approximately only 3% of the modeled pipelines exceeding the evaluation criteria of d/D > 0.75. In addition to the pipeline analysis, the majority of the maintenance holes in the collection system also fell within the evaluation criterion for surcharge depths. Maintenance hole surcharge depths calculated by the hydraulic model for dry weather and wet weather conditions. Figure 5-8 and Figure 5-9 show the above mentioned results for pipelines and maintenance holes respectively. 5.10.1 Recommended Improvements Recommended improvements for the gravity pipelines with future capacity limitations are based on the capacity needed to collect and convey projected future peak wet weather flows per the design criteria discussed in Section 4. These recommendations are shown on Figure 5-8, and summarized by length and diameter in Table 5-3. These recommendations are in addition to the recommendations listed in Table 5-2, which were improvements based on current capacity limitations. The recommendations include either upsizing pipe diameters to increase current capacity or field verify facility configurations (pipeline and maintenance holes) including invert elevation or pipe flow evaluation/monitoring to validate system configuration. Table 5-3. Build-Out System Pipeline Recommendations Diameter Total Length (feet) Comment 42" 300 Field Verification Required 39" 650 Field Verification Required 12" 3120 Upsizing Pipe Recommended 10" 1600 Upsizing Pipe Recommended 8" 1015 Upsizing Pipe Recommended 5.11 Pipeline Condition Assessment and Renewal Projects In addition to the capacity-related facility improvement recommendations, the City has invested in an ongoing asset management program to facilitate the programmatic assessment of facility condition and replacement. Through this program, the City has Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 77 identified a number of pipeline segments that warrant additional attention or are in need of replacement. The location of these pipes was shown on Figure 4-2 in the report. As an element of the City’s Pipeline (Main) Replacement Program, these pipe segments are denoted as higher priority and should receive priority funding under the replacement program activity. The integration of these priority improvements are subsequently included in the priority 5 year CIP derived in Section 6 of the Master Plan. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 79 6 Capital Improvement Program This section presents the recommended Sanitary Sewer System Capital Improvement Program (CIP) for the City and the methods used to determine the estimated cost of that program. The recommended projects allow the City to address the potential capacity limitations that have been identified through the master planning process and associated hydraulic capacity evaluations that may be needed to meet future flows. The CIP provided herein is based on a compilation of the information from previous tasks and is consolidated into the development of a comprehensive capital program. Preparation of planning level cost estimates of the identified capital improvements and prioritization according to the anticipated schedule is also included. 6.1 Development of the Capital Improvement Program Recommended system improvements are based upon the identified capacity limitations and system configuration findings derived during the existing system evaluation process, anticipated development throughout the City’s service area, and additional potential capacity limited areas that were identified following the inclusion of the projected new development areas provided by the City’s Planning Department. 6.2 Planning Level Unit Costs It is common for pipeline unit costs to vary considerably form one community to another. This variation is primarily attributed to the availability of nearby vacant land for construction staging, the age of the community, the depth of the sewer system, traffic implications, and the magnitude of underground utilities and corridor limitations. To assess an appropriate unit cost for sewer pipeline projects, the City reviewed recent local sewer projects, and found that a cost of approximately $300 per foot, regardless of pipe diameter to be a realistic cost for typical pipeline projects. Given this finding, City Staff, recommended a cost of $350/foot be used for the development of the CIP in this planning effort. It is believed that additional 15 percent unit cost contingency is an appropriate level of conservative cost estimating to cover for additional unknown factors that were not incurred during the City’s base unit cost assessment. 6.3 CIP Priority Classification During the development of the City’s sanitary sewer CIP program, the recommended improvement projects were classified into the following classes: Priority 1: Facilities with model predicted capacity limitations under existing conditions scenario Priority 2A: Field verification candidates requiring additional facility information. Priority 2B: Field verification candidates requiring additional flow information. Priority 3: Facilities with model predicted capacity limitation under future conditions scenario Sanitary Sewer System Master Plan City of Santa Monica 80 | August 7, 2017 Priority 4: Facilities identified by the City as replacement candidates and warrant additional attention or replacement under the City’s programmatic facility condition assessment and replacement program. 6.4 CIP Prioritization Approach In addition to the individual prioritization of capacity-related projects, other key factors have been integrated in the overall prioritization process. While some of these factors may be somewhat external to the performance of the City’s Sewer Enterprise, they will influence the timing and potential cost aspects of the program’s implementation and have an influence on the level of community disruption and overall quality of life in Santa Monica. These implementation elements include spatial demand triggers that link to CIP requirements and associated development projects, inclusion of a broader infrastructure management perspective by coordinating the CIP with other projects (e. g. , underground utility and paving projects) to minimize community disruption, consideration for cost segregation so that growth pays an appropriate share of costs, and an effort to develop a leveled CIP to match the programmed improvements with capital budgeting and ratepayer affordability and acceptance. The important end-result of this planning effort is the identification of a comprehensive CIP that is: • Time-phased to support needed budgetary considerations, • Work plan based to confirm and field verify system facility data and flow conditions to maximize the use of available funds and attain operational concurrence, • Flow-based to react to specific spatial triggers for implementing "just in time" design and construction, • Holistic through the integration of the broad community infrastructure management considerations including utility pipeline replacement efforts and programmatic street management services, and • Affordable by matching the current program with the current level of capital funding and allocating these funds across the variety of improvement program activity. By proceeding in the purposeful manner, the resulting CIP program is provided in the following sections. 6.5 Recommendations for System Improvements As a complete system, the City’s sanitary sewer collection system operates very well. The areas revealed through various existing condition evaluations and the hydraulic modeling analyses included capacity and operational deficiencies that prevent the system from functioning efficiently. The projects have been categorized into the following groups: • Capacity Projects (Priority 1 and 3): These are capacity improvement projects identified in Section 5, Hydraulic Model Development and System Analysis, by evaluating the response of the collection system for existing and future conditions using the collection system hydraulic model. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 81 • System Refinement/Additional Data Collection Projects (Priority 2A and 2B): These are the projects or activities that are needed to further refine the sewer system hydraulic model from additional field investigations, in the form of facility information validation or flow verification, to confirm pipeline and maintenance hole data and obtain new information on actual sewer flow conditions in various areas of the City. The results of this effort may enable the City to reduce the identified capacity-related improvements provided herein. • Pipeline Condition Assessment and Renewal Projects (Priority 4): These condition assessment projects are identified in Section 5 to understand specifically where collection system deficiencies are located. Pipeline condition assessment and/or renewal projects include both large and small diameter pipes. The City currently budgets approximately $3 million per year for this ongoing sewer main replacement program. 6.6 Summary of Recommendations 6.6.1 General Recommendations Like most cities, Santa Monica and its supporting infrastructure has continued to evolve over the years, resulting in a wide range of both asset type and asset age. To support the management of these assets, the City has been tracking its assets in its GIS database. To assure that the sanitary sewer system provides a minimum acceptable level of service, the City should implement the System Evaluation and Planning Criteria described in earlier Sections. The criteria specified in this document establish the minimum d/D ratios, velocity, and peak wet weather flow factors that should be considered for existing and future facilities. This master plan used the criteria from the System Evaluation and Planning Criteria as a benchmark with which City’s facilities were measured against. Where the existing or future system did not conform to the criteria, then a capacity limitation was identified and improvements proposed. In some special cases, deviation from the recommended criteria may be appropriate. This should only be considered, however, with the City Staff’s review and approval. In addition, a detailed cost estimate should be prepared to verify that sufficient funds have been budgeted. The City should maintain the master plan report and hydraulic computer model. Santa Monica has made a significant investment in both the master plan and hydraulic model of its sanitary sewer system. The master plan should be updated if there are significant changes in the development plans, growth projections, or the assumptions used as the basis for the master plan. Without a driving factor, the Master Plan should be updated in about 5 years. This is a typical frequency for master plan updates. The computer model should be updated much more frequently than the master plan and calibrated with field values on a regular basis. It is recommended that the City’s model be updated no less than once per year. Sanitary Sewer System Master Plan City of Santa Monica 82 | August 7, 2017 6.6.2 Recommendations for Model Predicted Hydraulic System Limitations Table 6-1 shows model predicted capacity limited pipelines, which are being recommended for improvement either by replacement or further field verification along with their CIP Priority classification and length in feet. Table 6-1.Recommended CIP Improvement Projects CIP Priority Total Pipe Length (feet) Project Group CIP Year 1 (Existing Conditions Capacity Projects) 5,800 1,4 Year 1 2A (Field Facility Information Verification 3,000 2,4,5,6,7,9,10 Year 1, 2 2B (Flow Verification) 4,650 Year 3, 4 3 (Future Capacity Projects) 5,750 3,5,12,13,14,15 Year 5 The recommended capacity improvement projects include required capacity expansions of the existing system to transport future/ultimate flows under design flow conditions. The resulting capacity improvement projects are prioritized by considering the following factors: • Model-predicted overflows • Model-predicted surcharging • Reported recurring overflows 6.6.3 Recommendations for Condition Assessment and Renewal Projects Based on the City’s operational and maintenance records, the City has identified certain pipeline candidates which have a high risk of failure based on historical observations. These high risk pipelines in term of structural failure were discussed in Section 4.1 of the report. These include projects falling in the following categories: • Customer service request follow-up investigation • Sewer blockage or structural problem follow-up investigation • Water main repair or relocation project proximity to sewer mains These account to an overall length of 52,000 ft., which would cost the City approximately $18.3 million over the next 12 years. Figure 4-2 identifies these projects and lists the spatial locations, lengths and diameters of these pipelines. It is recommended that as part of the City’s CIP, candidate projects be selected from this list based on other water main replacements/street paving projects to help the City align their replacement program with other Departments. Sanitary Sewer System Master Plan City of Santa Monica August 7, 2017 | 83 6.6.4 CIP Recommended Costs Table 6-1 summarizes the CIP recommendations in annual costs, over the next 5 years, for the above mentioned projects. Table 6-2. 5-Year CIP Summary Description Year 1 Year 2 Year 3 Year 4 Year5 Capacity Improvements $2,000,000 $1,200,000 $1,600,000 $2,000,000 Field Review Services $100,000 $80,000 Pipeline Replacements $900,000 $1,800,000 $1,400,000 $2,920,000 $1,000,000 TOTAL ANNUAL CIP $3,000,000 $3,000,000 $3,000,000 $3,000,000 $3,000,000 Appendix A. City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study CITY OF SANTA MONICA  SANITARY SEWER FLOW MONITORING  AND INFLOW/INFILTRATION STUDY Prepared for: HDR Engineering, Inc. 3230 El Camino Real, Suite 200 Irvine, CA 92602-1377 Date: June 2016 Prepared by: V&A Project No. 15-0346 Table of Contents i TABLE OF CONTENTS   EXECUTIVE SUMMARY ...................................................................................................................... 1 ES Scope and Purpose .................................................................................................................................. 1  Dry Weather Flow Monitoring and Capacity Results .............................................................................. 2   2010/2011 Wet Weather Flow Data and I/I Analysis Results ............................................................. 3  Recommendations ................................................................................................................................... 4   INTRODUCTION ................................................................................................................................. 5 1.0 1.1 Introduction ...................................................................................................................................... 5   METHODS AND PROCEDURES ......................................................................................................... 7 2.0 2.1 Confined Space Entry ....................................................................................................................... 7  2.2 Flow Meter Installation .................................................................................................................... 8  2.3 Flow Calculation ............................................................................................................................... 9   2016 DRY WEATHER FLOW MONITORING .................................................................................. 10 3.0 3.1 Average Dry Weather Flow Determination ................................................................................... 10  3.2 Peak Measured Flows and Pipeline Capacity Analysis ............................................................... 12   2010/2011 WET WEATHER FLOW DATA AND I/I ANALYSIS ...................................................... 14 4.0 4.1 Rainfall Data .................................................................................................................................. 14  4.2 Rainfall: Storm Event Classification ............................................................................................. 15  4.3 Inflow / Infiltration: Definitions and Identification ...................................................................... 17  4.3.1 Definition and Typical Sources............................................................................................ 17  4.3.2 Infiltration Components ....................................................................................................... 18  4.3.3 Impact and Cost of Source Detection and Removal .......................................................... 18  4.3.4 Graphical Identification of I/I .............................................................................................. 19  4.4 Inflow / Infiltration: Isolation and Synthetic Hydrographs .......................................................... 20  4.5 Inflow / Infiltration: Isolation Analysis Discussion ....................................................................... 21  4.5.1 Groundwater Infiltration Results Summary ........................................................................ 21  4.6 Design Storm: Development ......................................................................................................... 23  4.7 Design Storm: Response Summary ............................................................................................. 24  4.7.1 Basin Normalization Methods ............................................................................................. 24  4.7.2 Normalized I/I Response Summary .................................................................................... 25   CONCLUSIONS AND RECOMMENDATIONS .................................................................................. 26 5.0 5.1 Conclusions ................................................................................................................................... 26  5.2 Recommendations ........................................................................................................................ 26  City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study Table of Contents ii TABLES  Table ES-1. Capacity Analysis Summary ..................................................................................................... 2  Table ES-2. Design Storm I/I Analysis Summary ....................................................................................... 4  Table 1-1. List of 2010/2011 Flow Monitoring Sites ................................................................................ 5  Table 1-2. List of 2016 Flow Monitoring Sites ........................................................................................... 6  Table 3-1. Baseline Flow Summary ......................................................................................................... 11  Table 3-2. Capacity Analysis Summary .................................................................................................... 12  Table 4-1. Rainfall Events Used for I/I Analysis ...................................................................................... 14  Table 4-2. Classification of Rainfall Events ............................................................................................. 16  Table 4-3. Design Storm I/I Analysis Summary ....................................................................................... 25  FIGURES  Figure ES-1. Locations of Flow/Rainfall Monitoring Sites ......................................................................... 2  Figure 1-1. Locations of Flow/Rainfall Monitoring Sites ........................................................................... 6  Figure 2-1. Typical Installation for Flow Meter with Submerged Sensor .................................................. 8  Figure 3-1. Sample ADWF Diurnal Flow Patterns .................................................................................... 10  Figure 4-1. Rainfall Activity over Flow Monitoring Period (Downtown RG) ............................................ 14  Figure 4-2. NOAA Northern California Rainfall Frequency Map (10-Year, 24-Hour IDF) ...................... 15  Figure 4-3. Rainfall Event Classification .................................................................................................. 16  Figure 4-4. Typical Sources of Infiltration and Inflow ............................................................................. 17  Figure 4-5. Sample Infiltration and Inflow Isolation Graph .................................................................... 19  Figure 4-6. Synthetic Hydrograph Development (Site 1) ........................................................................ 20  Figure 4-7. Groundwater Infiltration Sample Figure ............................................................................... 22  Figure 4-8. Minimum Flow Ratios vs. ADWF ............................................................................................ 22  Figure 4-9. 10-Year, 24-Hour Design Storm Values and Profile ............................................................ 23  Figure 4-10. 10-Year, 24-Hour Design Storm: Estimated I/I Response (Site 1) ................................... 24  APPENDICES  Appendix A. Flow Monitoring Sites: Data, Graphs, Information    City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study Table of Contents iii ABBREVIATIONS, TERMS AND DEFINITIONS  USED IN THIS REPORT  Table i. Abbreviations   Abbreviation Term ADWF average dry weather flow CO carbon monoxide d/D depth/diameter ratio FM flow monitor H2S hydrogen sulfide I/I inflow and infiltration LEL lower explosive limit mgd million gallons per day NOAA National Oceanic and Atmospheric Administration Q flow rate RDI rainfall-dependent infiltration RRI rainfall-responsive infiltration RG rain gauge SSO sanitary sewer overflow WEF Water Environment Federation WRCC Western Regional Climate Center City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study Table of Contents iv Table ii. Terms and Definitions   Term Definition Average dry weather flow (ADWF) Average flow rate or pattern from days without noticeable inflow or infiltration response. ADWF usage patterns for weekdays and weekends differ and must be computed separately. ADWF can be expressed as a numeric average or as a curve showing the variation in flow over a day. ADWF includes the influence of normal groundwater infiltration (not related to a rain event). Basin Sanitary sewer collection system upstream of a given location (often a flow meter), including all pipelines, inlets, and appurtenances. Also refers to the ground surface area near and enclosed by pipelines. A basin may refer to the entire collection system upstream from a flow meter or exclude separately monitored basins upstream. Depth/diameter (d/D) ratio Depth of water in a pipe as a fraction of the pipe’s diameter. A measure of fullness of the pipe used in capacity analysis. Infiltration and inflow Infiltration and inflow (I/I) rates are calculated by subtracting the ADWF flow curve from the instantaneous flow measurements taken during and after a storm event. Flow in excess of the baseline consists of inflow, rainfall-responsive infiltration, and rainfall-dependent infiltration. Total I/I is the total sum in gallons of additional flow attributable to a storm event. Infiltration, groundwater Groundwater infiltration (GWI) is groundwater that enters the collection system through pipe defects. GWI depends on the depth of the groundwater table above the pipelines as well as the percentage of the system that is submerged. The variation of groundwater levels and subsequent groundwater infiltration rates is seasonal by nature. On a day-to-day basis, groundwater infiltration rates are relatively steady and will not fluctuate greatly. Infiltration, rainfall-dependent Rainfall-dependent infiltration (RDI) is similar to groundwater infiltration but occurs as a result of storm water. The storm water percolates into the soil, submerges more of the pipe system, and enters through pipe defects. RDI is the slowest component of storm-related infiltration and inflow, beginning gradually and often lasting 24 hours or longer. The response time depends on the soil permeability and saturation levels. Infiltration, rainfall-responsive Rainfall-responsive infiltration (RRI) is storm water that enters the collection system through pipe defects, but normally in sewers constructed close to the ground surface such as private laterals. RRI is independent of the groundwater table and reaches defective sewers via the pipe trench in which the sewer is constructed, particularly if the pipe is placed in impermeable soil and bedded and backfilled with a granular material. In this case, the pipe trench serves as a conduit similar to a French drain, conveying storm drainage to defective joints and other openings in the system. Inflow Inflow is defined as water discharged into the sewer system, including private sewer laterals, from direct connections such as downspouts, yard and area drains, holes in manhole covers, cross-connections from storm drains, or catch basins. Inflow creates a peak flow problem in the sewer system and often dictates the required capacity of downstream pipes and transport facilities to carry these peak instantaneous flows. Overflows are often attributable to high inflow rates. Normalization To run an “apples-to-apples” comparison amongst different basins, calculated metrics must be normalized. Individual basins will have different runoff areas, pipe lengths and sanitary flows. There are three common methods of normalization. Depending on the information available, one or all methods can be applied to a given project:  Pipe Length: The metric is divided by the length of pipe in the upstream City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study Table of Contents v Term Definition basin expressed in units of inch-diameter-mile (IDM).  Basin Area: The metric is divided by the estimated drainage area of the basin in acres.  ADWF: The metric is divided by the average dry weather sanitary flow (ADWF). Normalization, inflow The peak I/I flow rate is used to quantify inflow. Although the instantaneous flow monitoring data will typically show an inflow peak, the inflow response is measured from the I/I flow rate (in excess of baseline flow). This removes the effect of sanitary flow variations and measures only the I/I response:  Pipe Length: The peak I/I flow rate is divided by the length of pipe (IDM) in the upstream basin. The result is expressed in gallons per day (gpd) per IDM (gpd/IDM).  Basin Area: The peak I/I flow rate is divided by the geographic area of the upstream basin. The result is expressed in gpd per acre.  ADWF: The peak I/I flow rate is divided by the average dry weather flow (ADWF). This is a ratio and is expressed without units. Normalization, GWI The estimated GWI rates are compared to acceptable GWI rates, as defined by the Water Environment Federation, and are used to identify basins with high GWI:  Pipe Length: The GWI flow rate is divided by the length of pipe (IDM) in the upstream basin. The result is expressed in gallons per day (gpd) per IDM (gpd/IDM).  Basin Area: The GWI flow rate is divided by the geographic area of the upstream basin. The result is expressed in gpd per acre.  ADWF: The GWI flow rate is divided by the average dry weather flow (ADWF). This is a ratio and is expressed without units. Normalization, RDI The estimated RDI rates at a period 24 hours or more after the conclusion of a storm event are used to identify basins with high RDI:  Pipe Length: The RDI flow rate is divided by the length of pipe (IDM) in the upstream basin. The result is expressed in gallons per day (gpd) per IDM (gpd/IDM).  Basin Area: The RDI flow rate is divided by the geographic area of the upstream basin. The result is expressed in gpd per acre.  ADWF: The RDI flow rate is divided by the average dry weather flow (ADWF). This is a ratio and is expressed without units. Normalization, total I/I The estimated totalized I/I in gallons attributable to a particular storm event is used to identify basins with high total I/I. Because this is a totalized value rather than a rate and can be attributable solely to an individual storm event, the volume of the storm event is also taken into consideration. This allows for a comparison not only between basins but also between storm events:  Pipe Length: Total gallons of I/I is divided by the length of pipe (IDM) in the upstream basin and the rainfall total (inches) of the storm event. The result is expressed in gallons per IDM per inch-rain.  Basin Area (R-Value): Total gallons of I/I is divided by total gallons of rainfall City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study Table of Contents vi Term Definition water that fell within the acreage of the basin area. This is a ratio and is expressed as a percentage. R-Value is described as “the percentage of rainfall that enters the collection system.” Systems with R-Values less than 5%1 are often considered to be performing well.  ADWF: Total gallons of I/I is divided by the ADWF and the rainfall total of the storm event. The result is expressed in million gallons per MGD of ADWF per inch of rain. Peaking factor Ratio of peak measured flow to average dry weather flow. This ratio expresses the degree of fluctuation in flow rate over the monitoring period and is used in capacity analysis. Surcharge When the flow level is higher than the crown of the pipe, then the pipeline is said to be in a surcharged condition. The pipeline is surcharged when the d/D ratio is greater than 1.0. Weekend/weekday ratio The ratio of weekend ADWFs to weekday ADWFs. In residential areas, this ratio is typically slightly higher than 1.0. In business districts, depending on the type of service, this ratio can be significantly less than 1.0. 1 Keefe, P.N. “Test Basins for I/I Reduction and SSO Elimination.” 1998 WEF Wet Weather Specialty Conference, Cleveland. Executive Summary 1 EXECUTIVE SUMMARY ES Scope and Purpose  V&A Consulting Engineers (V&A) has completed sanitary sewer flow monitoring within the City of Santa Monica (City) collection system. Flow monitoring was performed over a period of 12 days from April 13 to April 24, 2016 at 12 open-channel flow monitoring sites. There was no rainfall during this period of time; the data was considered to be dry weather data. Additionally, V&A performed I/I analysis on wet weather data from six flow monitoring sites from the wet weather 2010/2011 season. There were two general purposes of this study: 1. 2016 Flow Monitoring: Establish the baseline sanitary sewer flows at the flow monitoring sites and estimate available sewer capacity. 2. 2010/2011 I/I Analysis: Develop I/I response curves for wet weather flow monitoring data captured during the 2010/2011 wet weather season at six monitoring sites. The I/I response curves will be used to develop synthetic I/I hydrographs that will be applied to a 10-year, 24- hour design storm event. The City can utilize the data for sewer hydraulic modeling analysis and sewer rehabilitation/ replacement verification. The 2016 flow monitoring site locations were selected and approved by HDR and the City. The 2010/2011 and the 2016 sites are illustrated in Figure ES-1. City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study Executive Summary 2 Figure ES‐1. Locations of Flow Monitoring Sites  Dry Weather Flow Monitoring and Capacity Results  Table ES-1 summarizes the flow monitoring and I/I results for the 2016 dry weather flow monitoring sites. It should be noted that the flow rate and sewer capacity information is presented on a site-by- site basis. Table ES‐1. Capacity Analysis Summary   Site Manhole ADWF (mgd) Peak Measured Flow (mgd) Peaking Factor Diameter (in) Peak Level (in) d/D Ratio Level Surcharged above Crown (ft) FM1 10-254 0.394 0.76 1.9 12 3.9 0.33 --- FM3 11-330 0.128 0.26 2.0 10 5.3 0.53 --- FM4 11-363A 7.205 10.92 1.5 36 16.6 0.46 --- FM6 17-711 0.894 1.48 1.7 29 12.1 0.42 --- FM7 31-1481 0.105 0.26 2.4 12 5.5 0.46 --- FM9 31-1529 0.977 1.75 1.8 21 4.9 0.23 --- FM10 40-1974 0.585 1.04 1.8 18 9.1 0.50 --- FM11 46-2249 0.910 1.51 1.7 27 4.7 0.17 --- City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study Executive Summary 3 Site Manhole ADWF (mgd) Peak Measured Flow (mgd) Peaking Factor Diameter (in) Peak Level (in) d/D Ratio Level Surcharged above Crown (ft) FM12 47-2282 0.0052 0.0296 5.6 13.5 3.3 0.24 --- FM13 7-115A 1.228 2.00 1.6 35 5.7 0.16 --- FM14 7-149A 1.191 2.37 2.0 54 21.9 0.40 --- FM16 7-165A 8.960 15.76 1.8 54 26.4 0.49 --- The following capacity analysis results are noted:  d/D Ratio: None of the sites had d/D ratio higher than the typical design threshold. None of the sites reached surcharged conditions during this study.  Peaking Factor: Site 12 had a peaking factor higher than the typical design threshold limits. This is likely due to the small service area and small ADWF values.  Capacity: For the dry weather sites that were monitored, the sewer system was in good condition on a capacity basis. 2010/2011 Wet Weather Flow Data and I/I Analysis Results  V&A was successful in isolating I/I response flows from baseline flows from the 2010/2011 flow d a t a . T h e s t o r m e v e n t s t h a t o c c u r r e d d u r i n g t h e f l o w m o n i t o r i n g p e r i o d w e r e f a v o r a b l e f o r I / I analysis. The December 17 – 22 rainfall event was classified as nearly a 2-year, 24-hour storm event and the 10 days of rainfall from December 17 to December 26 was classified as a 2-year, 10- day storm event. Given the strength of the rainfall event, both at the short-duration and long- duration periods, the level of confidence is strong for the I/I analyses. The following wet weather I/I analysis results are noted:  INFLOW: Most of the I/I within the collection system comes from inflow.  INFILTRATION: There was minimal rain dependent infiltration (RDI) observed during this flow monitoring study.  GWI: Groundwater infiltration rates were below established typical values per WEF. The isolated I/I response curves were modeled and extrapolated to a 10-year, 24-hour design storm event appropriate to the City of Santa Monica. Table ES-2 summarizes the peak I/I responses and response factors for the wet weather monitoring sites. City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study Executive Summary 4 Table ES‐2. Design Storm I/I Analysis Summary   Site City Manhole Design Storm Peak I/I Response (mgd) ADWF (mgd) Basin Pipe Length (IDM) Peak I/I Response per ADWF (In MGD per MGD of basin ADWF) Peak I/I Response per IDM (In MGD per IDM of basin pipe) Site 1 11-333 5.57 0.98 214.7 5.57 0.0255 Site 2 11-332 4.99 0.99 515.2 4.99 0.0096 Site 3 11-331 2.48 0.62 81.4 2.48 0.0188 Site 4 11-352 2.32 4.18 320.5 2.32 0.0302 Site 5 12-378 4.44 0.67 84.7 4.44 0.0352 Site 6 Unknown 4.24 1.18 382.3 4.24 0.0130 The following I/I response items are noted:  Sites 1, 2 and 5 rank highest for Peak I/I response using the per-ADWF method. Sites 1, 4 and 5 rank highest for Peak I/I response using the per-IDM method.  The City and master planning consultant may wish to utilize the Bullet 1 rankings for prioritization of future I/I investigation, mitigation and reduction efforts. Recommendations  V&A advises that future I/I reduction plans consider the following recommendations if I/I is of concern to the City: 1. Determine I/I Reduction Program: The City should examine its I/I reduction needs to determine their strategy and goals for a future I/I reduction program. a. If peak flows, sanitary sewer overflows, and pipeline capacity issues are of greater concern, then priority can be given to investigate and reduce sources of inflow within the basins with higher normalized peak I/I responses. This would appear to be the greatest concern for the City collection system. b. If infiltration and general pipeline deterioration are of greater concern, then the program can be weighted to investigate and reduce sources of infiltration within the basins with higher normalized RDI responses. However, infiltration does not appear to be an issue for the City collection system. 2. I/I Investigation Methods: Potential I/I investigation methods include the following: a. Smoke testing: This method typically used to locate inflow sources. b. CCTV inspection: This method is typically used to locate condition assessment defects linked to infiltration sources. c. Mini-Basin Flow Monitoring: This method can be used to isolate smaller catchment areas in which to locate infiltration and inflow sources. 3. I/I Reduction Cost Effective Analysis: The City may wish to conduct a study to determine which is more cost-effective: (1) locating the sources of inflow/infiltration and systematically rehabilitating or replacing the faulty pipelines; or (2) continued treatment of the additional I/I flow. Introduction 5 INTRODUCTION 1.0 1.1 Introduction  V&A Consulting Engineers (V&A) has completed sanitary sewer flow monitoring within the City of Santa Monica (City) collection system. Flow monitoring was performed over a period of 12 days from April 13 to April 24, 2016 at 12 open-channel flow monitoring sites. There was no rainfall during this period of time; the data was considered to be dry weather data. Additionally, V&A performed I/I analysis on wet weather data from six flow monitoring sites from the wet weather 2010/2011 season. There were two general purposes of this study: 3. 2016 Flow Monitoring: Establish the baseline sanitary sewer flows at the flow monitoring sites and estimate available sewer capacity. These data will be utilized to calibrate dry weather flows for the HDR sanitary sewer model. 4. 2010/2011 I/I Analysis: Develop I/I response curves for wet weather flow monitoring data captured during the 2010/2011 wet weather season at six monitoring sites. The I/I response curves will be used to develop synthetic I/I hydrographs that will be applied to a 10-year, 24- hour design storm event. I/I response factors for the 6 sites and corresponding drainage basins will be utilized for the HDR sanitary sewer modeling effort. The 2016 flow monitoring site locations were selected and approved by HDR and the City. The 2010/2011 flow monitoring sites are listed in Table 1-1 and the 2016 sites are listed in Table 1-2. Both sets of monitoring sites are illustrated in Figure 1-1. Table 1‐1. List of 2010/2011 Flow Monitoring Sites   Monitoring Site City Manhole ID Measured Pipe Diameter (in.) Location Site 1 11-333 30 Colorado Avenue, west of 4th Street Site 2 11-332 24 Colorado Avenue, west of 4th Street Site 3 11-331 18 2nd Street, west of Colorado Avenue Site 4 11-352 27 1st Court, west of Colorado Avenue Site 5 12-378 18 Pico Blvd between Main Street and 3rd Street Site 6 Unknown 36 Hampton Drive, north of Rose Avenue City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study Introduction 6 Table 1‐2. List of 2016 Flow Monitoring Sites   Monitoring Site City Manhole ID Measured Pipe Diameter (in.) Location FM1 10-254 12 Alley between 3rd and 4th Street, between Washington Avenue and California Avenue FM3 11-330 10 2nd Street and Broadway FM4 11-363A 36 Ocean Avenue at Moomat Ahiko Way FM6 17-711 29 Colorado Avenue at Lincoln Court FM7 31-1481 12 17th Court between Santa Monica Boulevard and Broadway FM9 31-1529 21 Colorado Avenue at 19th Court FM10 40-1974 18 Michigan Avenue at Cloverfield Boulevard FM11 46-2249 27 26th Street between Broadway and Colorado Avenue FM12 47-2282 13.5 3033 Virginia Avenue FM13 7-115A 35 Marine Street north of Main Street FM14 7-149A 54 Main Street between Pier Avenue and Marine Street FM16 7-165A 54 Main Street between Pier Avenue and Marine Street Figure 1‐1. Locations of Flow Monitoring Sites  Methods and Procedures 7 METHODS AND PROCEDURES 2.0 2.1 Confined Space Entry  A confined space (Photo 2-1) is defined as any space that is large enough and so configured that a person can bodily enter and perform assigned work, has limited or restricted means for entry or exit and is not designed for continuous employee occupancy. In general, the atmosphere must be constantly monitored for sufficient levels of oxygen (19.5% to 23.5%), and the absence of hydrogen sulfide (H2S) gas, carbon monoxide (CO) gas, and lower explosive limit (LEL) levels. A typical confined space entry crew has members with OSHA-defined responsibilities of Entrant, Attendant and Supervisor. The Entrant is the individual performing the work. He or she is equipped with the necessary personal protective equipment needed to perform the job safely, including a personal four-gas monitor (Photo 2-2). If it is not possible to maintain line-of-sight with the Entrant, then more Entrants are required until line-of-sight can be maintained. The Attendant is responsible for maintaining contact with the Entrants to monitor the atmosphere using another four-gas monitor and maintaining records of all Entrants, if there are more than one. The Supervisor is responsible for developing the safe work plan for the job at hand prior to entering. Photo 2‐1. Confined Space Entry Photo 2‐2. Typical Personal Four‐Gas  Monitor  City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study Methods and Procedures 8 2.2 Flow Meter Installation  Teledyne Isco 2150 meters were installed by V&A in the sewer lines listed in Table 1-2. Isco 2150 meters use submerged sensors with a pressure transducer to collect depth readings and an ultrasonic Doppler sensor to determine the average fluid velocity. The ultrasonic sensor emits high- frequency sound waves, which are reflected by air bubbles and suspended particles in the flow. The sensor receives the reflected signal and determines the Doppler frequency shift, which indicates the estimated average flow velocity The sensor is typically mounted at a manhole inlet to take advantage of smoother upstream flow conditions. The sensor may be offset to one side to lessen the chances of fouling and sedimentation where these problems are expected to occur. Manual level and velocity measurements were taken during installation of the flow meters and again when they were removed and were compared to simultaneous level and velocity readings from the flow meters to ensure proper calibration and accuracy. The pipe diameter was also verified in order to accurately calculate the flow cross-section. The continuous depth and velocity readings were recorded by the flow meters on 5-minute intervals. Figure 2-1 shows a typical installation for a flow meter with a submerged sensor. Figure 2‐1. Typical Installation for Flow Meter with Submerged Sensor    City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study Methods and Procedures 9 2.3 Flow Calculation  Data retrieved from the flow meter was placed into a spreadsheet program for analysis. Data analysis includes data comparison to field calibration measurements, as well as necessary geometric adjustments as required for sediment (sediment reduces the pipe’s wetted cross-sectional area available to carry flow). Area-velocity flow metering uses the continuity equation, ) (S TA A v A v Q     where Q : volume flow rate v: average velocity as determined by the ultrasonic sensor A: cross-sectional area available to carry flow AT: total cross-sectional area with both wastewater and sediment AS: cross-sectional area of sediment. For circular pipe,                 D dDdD D dDA WWWT 21cossin2 2 21cos4 112                 D dDdD D dDA S S S S 21cossin2 2 21cos4 112 where dW: distance between wastewater surface level and pipe invert dS: depth of sediment D: pipe diameter 2016 Dry Weather Flow Monitoring 10 2016 DRY WEATHER FLOW 3.0 MONITORING  3.1 Average Dry Weather Flow Determination  The dry days from April 13 to 24, 2016 were used to establish four distinct average dry weather flow (ADWF) curves were established for each site location:  Mondays – Thursdays  Fridays  Saturdays  Sundays Flows for many sites differ on Friday evenings compared to Mondays through Thursdays. Starting around 7 pm, the flows are often decreased (compared to Monday through Thursday). Similarly, flow patterns for Saturday and Sunday were also separated due to their unique evening flow pattern. This type of differentiation can be important when determining I/I response, especially if a rain event occurs on a Friday, Saturday or Sunday evening. Figure 3-1 illustrates a sample of varying flow patterns within a typical dry week. Graphs of the ADWF flow patterns for each site can be found in Appendix A. Figure 3‐1. Sample ADWF Diurnal Flow Patterns  0.00 1.00 2.00 3.00 4.00 5.00 6.00 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 00 Fl o w ( m g d ) Hour Mon-Thu Friday Saturday Sunday City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study 2016 Dry Weather Flow Monitoring 11 The overall average dry weather flow (ADWF) was calculated per the following equation:         7 1 7 1 7 1 7 4 SunSatFriThuMonADWFADWFADWFADWFADWF , Table 3-1 summarizes the baseline flow data measured during this study. Table 3‐1. Baseline Flow Summary   Monitoring Site Manhole Sediment (in.) Monday- Thursday ADWF (mgd) Friday ADWF (mgd) Saturday ADWF (mgd) Sunday ADWF (mgd) Overall ADWF (mgd) FM1 10-254 - 0.387 0.382 0.412 0.413 0.394 FM3 11-330 - 0.129 0.114 0.128 0.137 0.128 FM4 11-363A - 7.301 7.365 6.951 6.920 7.205 FM6 17-711 2.0 0.912 0.883 0.854 0.868 0.894 FM7 31-1481 - 0.107 0.109 0.098 0.100 0.105 FM9 31-1529 - 1.008 0.996 0.904 0.904 0.977 FM10 40-1974 - 0.607 0.566 0.543 0.558 0.585 FM11 46-2249 - 0.916 0.935 0.894 0.874 0.910 FM12 47-2282 0.5 0.0052 0.0060 0.0049 0.0050 0.0052 FM13 7-115A - 1.258 1.205 1.182 1.178 1.228 FM14 7-149A 0.5 1.192 1.170 1.203 1.200 1.191 FM16 7-165A - 9.032 9.173 8.707 8.716 8.960   City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study 2016 Dry Weather Flow Monitoring 12 3.2 Peak Measured Flows and Pipeline Capacity Analysis  Peak measured flows and the corresponding flow levels (depths) are important to understand the capacity limitations of a collection system. The peak flows and flow levels reported are from the peak measurements as taken across the entirety of the flow monitoring period. Peak flows and levels may not correspond to a rainfall event. The following capacity analysis terms are defined as follows:  Peaking Factor: Peaking factor is defined as the peak measured flow divided by the average dry weather flow (ADWF). Peaking factors are influenced by many factors including size and topography of tributary area, proximity to pump stations, and the amount and characteristics of I/I entering the collection system. Flow attenuation and flow restrictions will also affect the peaking factor. A peaking factor threshold value of 3.0 is commonly used for sanitary sewer design of new pipe; however, it is noted that this value is variable and subject to attenuation and the size of the upstream collector area. The City should follow its own standards and criteria when examining peaking factors.  d/D Ratio: The d/D ratio is the peak measured depth of flow (d) divided by the pipe diameter (D). Standards for d/D ratio vary from agency to agency, but typically range between d/D ≤ 0.5 and d/D ≤ 0.75. The d/D ratio for each site was computed based on the maximum depth of flow for the flow monitoring study. Table 3-2 summarizes the peak recorded flows, levels, d/D ratios, and peaking factors per site during the flow monitoring period. Capacity analysis data is presented on a site-by-site basis and represents the hydraulic conditions only at the point site locations. Hydraulic conditions in other areas of the collection system will differ. Table 3‐2. Capacity Analysis Summary  Site Manhole ADWF (mgd) Peak Measured Flow (mgd) Peaking Factor Diameter (in) Peak Level (in) d/D Ratio Level Surcharged above Crown (ft) FM1 10-254 0.394 0.76 1.9 12 3.9 0.33 --- FM3 11-330 0.128 0.26 2.0 10 5.3 0.53 --- FM4 11-363A 7.205 10.92 1.5 36 16.6 0.46 --- FM6 17-711 0.894 1.48 1.7 29 12.1 0.42 --- FM7 31-1481 0.105 0.26 2.4 12 5.5 0.46 --- FM9 31-1529 0.977 1.75 1.8 21 4.9 0.23 --- FM10 40-1974 0.585 1.04 1.8 18 9.1 0.50 --- FM11 46-2249 0.910 1.51 1.7 27 4.7 0.17 --- City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study 2016 Dry Weather Flow Monitoring 13 Site Manhole ADWF (mgd) Peak Measured Flow (mgd) Peaking Factor Diameter (in) Peak Level (in) d/D Ratio Level Surcharged above Crown (ft) FM12 47-2282 0.0052 0.0296 5.6 13.5 3.3 0.24 --- FM13 7-115A 1.228 2.00 1.6 35 5.7 0.16 --- FM14 7-149A 1.191 2.37 2.0 54 21.9 0.40 --- FM16 7-165A 8.960 15.76 1.8 54 26.4 0.49 --- The following capacity analysis results are noted:  d/D Ratio: Site FM3 (MH 11-330) and FM 10 (MH 40-1974) reached the 0.50 d/D ratio threshold. None of the sites reached the 0.75 d/D ratio threshold. None of the sites reached surcharged conditions during this study.  Peaking Factor: Site 12 had a peaking factor higher than the typical design threshold limits. This is likely due to the small service area and small ADWF values. 2010/2011 Wet Weather Flow Data and I/I Analysis 14 2010/2011 WET WEATHER FLOW 4.0 DATA AND I/I ANALYSIS  4.1 Rainfall Data  V&A utilized data from V&A rain gauges and rain gauges from the network of the Citizen Weather Observer Program (CWOP) through the National Oceanic and Atmospheric Administration (NOAA). Data was triangulated for downtown Santa Monica. There were three storms that occurred over the course of the flow monitoring period, as summarized in Table 4-1 and illustrated in Figure 4-1. The combined December 17 – 22 and December 25 – 26 storms caused the greatest I/I response in the City collection system; these two storms were used for the I/I analyses in this report. Table 4‐1. Rainfall Events Used for I/I Analysis   Rainfall Events Downtown Santa Monica (in) December 17 – 22, 2010 6.34 December 25 – 26, 2010 0.78 February 15 – 20, 2011 1.43 Total December 13, 2010 to March 1, 2011 8.73 Figure 4‐1. Rainfall Activity over Flow Monitoring Period (Downtown RG)  0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 13 - D e c 15 - D e c 17 - D e c 19 - D e c 21 - D e c 23 - D e c 25 - D e c 27 - D e c 29 - D e c 31 - D e c 2- J a n 4- J a n 6- J a n 8- J a n 10 - J a n 12 - J a n 14 - J a n 16 - J a n 18 - J a n 20 - J a n 22 - J a n 24 - J a n 26 - J a n 28 - J a n 30 - J a n 1- F e b 3- F e b 5- F e b 7- F e b 9- F e b 11 - F e b 13 - F e b 15 - F e b 17 - F e b 19 - F e b 21 - F e b 23 - F e b 25 - F e b Ra i n ( i n c h e s p e r h o u r ) Total Rainfall over Period : 8.73 inches6.34 in 0.78 in 1.43 in City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study 2010/2011 Wet Weather Flow Data and I/I Analysis 15 4.2 Rainfall: Storm Event Classification  It is important to classify the relative size of a major storm event that occurs over the course of a flow monitoring period in order to compare the observed flow response to that occurring during a design storm event (sanitary sewers are often designed to withstand I/I contribution to sanitary flows for specific-sized “design” storm events). Rainfall events are classified by intensity and duration. For example, the NOAA Rainfall Frequency Atlas shown in Figure 4-2 (NOAA Western U.S. Precipitation Frequency Maps Atlas 2, 1973: http://www.wrcc.dri.edu/pcpnfreq.html) classifies a 10-year, 24- hour storm event in downtown Santa Monica as 4.52 inches. This means that in any given year, at this specific location, there is a 10% chance that 4.52 inches of rain will fall in any 24-hour period. Figure 4‐2. NOAA Southern California Rainfall Frequency Map (10‐Year, 24‐Hour IDF)  From the NOAA frequency maps, for a specific latitude and longitude, the rainfall densities for period durations ranging from 15 minutes to 60 days are known for rain events ranging from 1-year to 100- year intensities. These are plotted to develop a rain event frequency map specific to each rainfall monitoring site. Superimposing the peak measured densities for all the rainfall events on the rain event frequency plot determines the classification of the storm event, shown in Figure 4-3 for downtown Santa Monica. Table 4-2 summarizes the classification of the rainfall events that occurred during the flow monitoring period. Santa Monica Rainfall in tenths  of an inch  City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study 2010/2011 Wet Weather Flow Data and I/I Analysis 16 Figure 4‐3. Rainfall Event Classification  Table 4‐2. Classification of Rainfall Events   Rainfall Event Downtown Santa Monica December 17 - 22, 2010 1.5 Year, 24-Hour 5 Year, 7-Day December 25 - 26, 2010 < 1 Year February 15 - 20, 2011 < 1 Year The December 17 – 22 rainfall event was classified as nearly a 2-year, 24-hour storm event and a 5- year, 3-day to 7-day event. The 10 days of rainfall from December 17 to December 26 was also classified as a 5-year, 10-day storm event. Given the strength of the rainfall event, both at the short- duration and long-duration periods, the level of confidence in the future I/I extrapolation to a design storm event is strong.   1 2 5 0 0.5 1 1.5 2 2.5 3 3.5 4 In c h e s  of  Ra i n Dec 17 ‐ 22, 2010 Dec 25 ‐ 26, 2010 Feb 15 ‐ 20, 2011 1‐hr 2‐hr 3‐hr 6‐hr 12‐hr 24‐hr 1 2 5 0 2 4 6 8 10 12 14 In c h e s  of  Ra i n Season Dec 17 ‐ 22, 2010 Dec 25 ‐ 26, 2010 Feb 15 ‐ 20, 2011 1‐day 247‐day 20‐day 60‐day30‐day10‐day 45‐day3 City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study 2010/2011 Wet Weather Flow Data and I/I Analysis 17 4.3 Inflow / Infiltration: Definitions and Identification  Inflow and infiltration (I/I) consists of storm water and groundwater that enter the sewer system through pipe defects and improper storm drainage connections and is defined as follows: 4.3.1 Definition and Typical Sources    Inflow: Storm water inflow is defined as water discharged into the sewer system, including private sewer laterals, from direct connections such as downspouts, yard and area drains, holes in manhole covers, cross-connections from storm drains, or catch basins.  Infiltration: Infiltration is defined as water entering the sanitary sewer system through defects in pipes, pipe joints, and manhole walls, which may include cracks, offset joints, root intrusion points, and broken pipes. Figure 4-4 illustrates the possible sources and components of I/I. Figure 4‐4. Typical Sources of Infiltration and Inflow  City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study 2010/2011 Wet Weather Flow Data and I/I Analysis 18 4.3.2 Infiltration Components  Infiltration can be further subdivided into components as follows:  Groundwater Infiltration: Groundwater infiltration depends on the depth of the groundwater table above the pipelines as well as the percentage of the system submerged. The variation of groundwater levels and subsequent groundwater infiltration rates is seasonal by nature. On a day-to-day basis, groundwater infiltration rates are relatively steady and will not fluctuate greatly.  Rainfall-Dependent Infiltration: This component occurs as a result of storm water and enters the sewer system through pipe defects, as with groundwater infiltration. The storm water first percolates directly into the soil and then migrates to an infiltration point. Typically, the time of concentration for rainfall-related infiltration may be 24 hours or longer, but this depends on the soil permeability and saturation levels.  Rainfall-Responsive Infiltration is storm water which enters the collection system indirectly through pipe defects, but normally in sewers constructed close to the ground surface such as private laterals. Rainfall-responsive infiltration is independent of the groundwater table and reaches defective sewers via the pipe trench in which the sewer is constructed, particularly if the pipe is placed in impermeable soil and bedded and backfilled with a granular material. In this case, the pipe trench serves as a conduit similar to a French drain, conveying storm drainage to defective joints and other openings in the system. This type of infiltration can have a quick response and graphically can look very similar to inflow. 4.3.3 Impact and Cost of Source Detection and Removal   Inflow: ○ Impact: This component of I/I creates a peak flow problem in the sewer system and often dictates the required capacity of downstream pipes and transport facilities to carry these peak instantaneous flows. Because the response and magnitude of inflow is tied closely to the intensity of the storm event, the short-term peak instantaneous flows may result in surcharging and overflows within a collection system. Severe inflow may result in sewage dilution, resulting in upsetting the biological treatment (secondary treatment) at the treatment facility. ○ Cost of Source Identification and Removal: Inflow locations are usually less difficult to find and less expensive to correct. These sources include direct and indirect cross- connections with storm drainage systems, roof downspouts, and various types of surface drains. Generally, the costs to identify and remove sources of inflow are low compared to potential benefits to public health and safety or the costs of building new facilities to convey and treat the resulting peak flows.  Infiltration: ○ Impact: Infiltration typically creates long-term annual volumetric problems. The major impact is the cost of pumping and treating the additional volume of water, and of paying for treatment (for municipalities that are billed strictly on flow volume). City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study 2010/2011 Wet Weather Flow Data and I/I Analysis 19 ○ Cost of Source Detection and Removal: Infiltration sources are usually harder to find and more expensive to correct than inflow sources. Infiltration sources include defects in deteriorated sewer pipes or manholes that may be widespread throughout a sanitary sewer system. 4.3.4 Graphical Identification of I/I  Inflow is usually recognized graphically by large-magnitude, short-duration spikes immediately following a rain event. Infiltration is often recognized graphically by a gradual increase in flow after a wet-weather event. The increased flow typically sustains for a period after rainfall has stopped and then gradually drops off as soils become less saturated and as groundwater levels recede to normal levels. Realtime flows were plotted against ADWF to analyze the I/I response to rainfall events. Figure 4-5 illustrates a sample of how this analysis is conducted and some of the measurements that are used to distinguish infiltration and inflow. Similar graphs were generated for the individual flow monitoring sites and can be found in Appendix A. Figure 4‐5. Sample Infiltration and Inflow Isolation Graph    City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study 2010/2011 Wet Weather Flow Data and I/I Analysis 20 4.4 Inflow / Infiltration: Isolation and Synthetic Hydrographs  In order to model the I/I response to the provided rainfall event, synthetic hydrographs were developed to approximate the actual I/I hydrograph shape in terms of the time to the peak and the recession coefficient. The actual I/I hydrograph was best matched with a synthetic hydrograph by separating the synthetic hydrograph into seven volume components (R1 through R7). The seven components represent different response times to the rainfall event and, therefore, different infiltration or inflow paths into the sewer system. R1 is characterized by a short response time (inflow) and R7 represents slower response and longer recession times (RDI). Levels of soil saturation are also considered. Using synthetic hydrograph analysis, appropriate time and recession parameters were estimated by a trial-and-error procedure until a good match was obtained. For example, the hydrograph and its component hydrographs for December 20 – 28, 2010 at Site 1 are shown in Figure 4-6. Figure 4‐6. Synthetic Hydrograph Development (Site 1)  0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80.00 0.50 1.00 1.50 2.00 2.50 20-Dec 21-Dec 22-Dec 23-Dec 24-Dec 25-Dec 26-Dec 27-Dec Ra i n ( i n / h r ) Fl o w ( m g d ) 0.0 0.2 0.4 0.6 0.80.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 20-Dec 21-Dec 22-Dec 23-Dec 24-Dec 25-Dec 26-Dec 27-Dec Ra i n ( i n / h r ) I& I F l o w ( m g d ) 0.00 0.20 0.40 0.60 0.80 1.00 20-Dec 21-Dec 22-Dec 23-Dec 24-Dec 25-Dec 26-Dec 27-Dec I/ I C o m p . ( m g d ) Real‐time Flow Baseline Flow Isolated Real‐time I/I Response Synthetic (modeled) I/I Response  Rain R1 Component R2 Component R3 Component R4 Component R5 Component R6 Component R7 Component City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study 2010/2011 Wet Weather Flow Data and I/I Analysis 21 4.5 Inflow / Infiltration: Isolation Analysis Discussion  Notes on the I/I response curves are summarized as follows:  The I/I isolation graphs for the six sites showed similar I/I response trends, mainly a very quick return towards baseline flow levels after the rainfall event. ○ Referring to the real-time isolated response curve (purple line, middle graph) in Figure 4-6: After the strong I/I response (over 1.0 mgd of I/I during the December 25/26 rainfall event), real-time flows immediately drop to baseline levels within hours of the conclusion of rainfall.  The I/I isolation analysis occurred during a strong, long-duration rainfall event (5-Year, 10- day rainfall event). This size and duration of event should result in saturated soil conditions.  A quick return to baseline flow levels, even during a significant long rainfall event indicate that inflow is the primary component occurring with the City collection system.  Rain-dependent infiltration does not appear to be a substantial component or issue with the City collection system. ○ Note: This is further substantiated by analyzing the R1 through R7 component I/I hydrographs. The most significant components are the R1 and R2 components, which are by definition quick-response components. Minimal RDI response generally indicates minimal GWI within the collection system as well. The following section analyzes the ADWF results for indications of GWI. 4.5.1 Groundwater Infiltration Results Summary  Dry weather (ADWF) flow can be expected to have a predictable diurnal flow pattern. While each site is unique, experience has shown that, given a reasonable volume of flow and typical loading conditions, the daily flows fall into a predictable range when compared to the daily average flow. If a site has a large percentage of groundwater infiltration occurring during the periods of dry weather flow measurement, the amplitudes of the peak and low flows will be dampened2. Figure 4-7 shows a sample of two flow monitoring sites, both with nearly the same average daily flow, but with considerably different peak and low flows. In this sample case, Site B1 has a considerable volume of GWI, whereas Site A9 has a typical volume of GWI. 2 In an extreme case, perhaps 0.2 mgd of ADWF flow and 2.0 mgd of groundwater infiltration, the peaks and lows would be barely recognizable; the ADWF flow would be nearly a straight line. City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study 2010/2011 Wet Weather Flow Data and I/I Analysis 22 Figure 4‐7. Groundwater Infiltration Sample Figure  It can be useful to compare the low-to-ADWF flow ratios for the flow metering sites. A site with abnormal ratios, and with no other reasons to suspect abnormal flow patterns (such as proximity to a pump station, treatment facilities, etc.), has a possibility of higher levels of groundwater infiltration in comparison to the rest of the collection system. Figure 4-8 plots the low-to-ADWF flow ratios against the ADWF flows for the basins monitored during the 2010/2011 flow study. The brown dashed line shows “typical” low-to-ADWF ratios per the Water Environment Federation (WEF)3. Figure 4‐8. Minimum Flow Ratios vs. ADWF4  All of the six sites had GWI rates well below typical standards. These six sites also collect from a majority of the City collection system. It is concluded that RDI and GWI components within the City collection system are minimal. 3 WEF Manual of Practice No. 9, “Design and Construction of Sanitary and Storm Sewers.” 4 Due to attenuation, it should be expected that sites with larger flow volumes should not have quite the peak-to-average and low-to- average flow ratios as sites with lesser flow volumes. This is why the WEF typical trend line’s slope is closer to 1.0 as the ADWF increases, as shown in the figure. West County Wastewater District: B1 and A9 Baseline Weekday Flows 0.0 0.1 0.2 0.3 0.4 0.5 0.6 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 00 Hour Fl o w N 1 ( M G D ) Site A9 Site B1 Site B1 Baseline Weekday Flow: 0.30 MGD Site A9 Baseline Weekday Flow: 0.28 MGD  ‐  0.1  0.2  0.3  0.4  0.5  0.6  0.7  0.8 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 Mi n ‐to ‐Av g    Fl o w  Ra t i o ADWF (mgd) WEF Typical Low‐to‐AverageRatio City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study 2010/2011 Wet Weather Flow Data and I/I Analysis 23 4.6 Design Storm: Development  With the I/I response modeled by a synthetic hydrograph, design storms can be applied. The resulting I/I flow can be predicted for a design storm event. This helps to calibrate modeling efforts that will determine if the collection system has adequate capacity to handle very large storm events. V&A used a 10-year, 24-hour design storm for this analysis. Storm events were taken from the NOAA Precipitation-Frequency Atlas of the Western United States. Figure 4-9 summarizes the design storm magnitude and profile for downtown Santa Monica. This particular profile distribution also fits the NOAA criterion for 2-hour and 6-hour durations, in addition to the 24-hour duration. 10-Year, 24-hour Design Storm Hour Inches of Rain 1 0.010 2 0.024 3 0.241 4 0.145 5 0.048 6 0.014 7 0.207 8 0.119 9 0.166 10 0.059 11 0.030 12 0.012 13 0.122 14 0.342 15 0.041 16 0.224 17 0.224 18 0.529 19 0.982 20 0.448 21 0.224 22 0.098 23 0.163 24 0.049 Total: 4.52 Figure 4‐9. 10‐Year, 24‐Hour Design Storm Values and Profile    0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Ra i n f a l l ( i n / h r ) Hour City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study 2010/2011 Wet Weather Flow Data and I/I Analysis 24 4.7 Design Storm: Response Summary  The 10-year, 24-hour storm event was applied to the synthetic I/I hydrographs developed for each flow monitoring site, producing a design storm I/I response curve for each site. Figure 4-10 shows the synthetic hydrograph response for the design storm event at Site1. In this graphic, the I/I response is plotted to coincide with the peak baseline daily flows to get a “worst-case” scenario of peak wet weather flows. Figure 4‐10. 10‐Year, 24‐Hour Design Storm: Estimated I/I Response (Site 1)  4.7.1 Basin Normalization Methods  Normalizing the response curves serves two purposes: (1) The I/I response curves may be applied to smaller sub-basins within the main monitored basins. This will be useful for forthcoming modeling efforts that may determine if the collection system has adequate capacity to handle very large storm events. (2) Normalizing allows for an “apples-to-apples” comparison amongst the six different drainage basins. This may be useful to determine which basins have the most relative I/I and may help prioritize which basins to investigate for future I/I mitigation and reduction efforts. V&A normalized the I/I response curves per the following normalization methods:  per-ADWF: The normalization method divides by the established average dry weather flow rate measured at the flow monitoring site.  per-IDM: The normalization method divides by length of pipe (IDM [inch-diameter mile]) contained within the upstream basin. 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.60.0 1.0 2.0 3.0 4.0 5.0 6.0 Day 0 Day 1 Day 2 Day 3 Day 4 Ra i n ( i n / h r ) I/ I C o m p o n e n t ( m g d ) Design Storm Rain Estimated I/I Response R1 Component R2 Component R3 Component R4 Component R5 Component R6 Component R7 Component City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study 2010/2011 Wet Weather Flow Data and I/I Analysis 25 Example with Sample Sub-Catchment Area Given a sub-catchment “Area A” contained within the Site 1 basin, with an estimated ADWF of 0.2 mgd and containing pipes summing a total IDM of 50 inch-diameter miles. From Figure 4-10 the peak I/I response for Site 1 for the design storm is 5.48 mgd. The established ADWF at this location was 0.983 mgd and the length of pipe in the Site 1 basin per GIS data (given by HDR) is known to be IDM = 214.7 inch-diameter miles (IDM). Basin 1 I/I Peak Response Factors: Peak I/I per ADWF = 5.48 mgd / 0.983 mgd = 5.57 (mgd per mgd of ADWF) Peak I/I per IDM = 5.48 mgd / 214.7 IDM = 0.0255 (mgd per IDM) Sub-Catchment Area A Projected Peak I/I Response: Peak I/I per ADWF = 5.57 x 0.2 mgd = 1.11 mgd (peak I/I rate) Peak I/I per IDM = 0.0255 x 50 IDM = 1.28 mgd (peak I/I rate) The estimated peak I/I would be summed with the estimated peak average dry weather flow within the sub-catchment area to get an estimated peak flow for the design storm event. These values can be entered into a static model (as calculated above) or the entirety of the response curve can be input into a dynamic model. The master plan consulting engineer can decide which normalization method to utilize for system modeling. 4.7.2 Normalized I/I Response Summary  Table 4-3 summarizes the peak normalized I/I rates for the six sites (IDM values provided by HDR). Table 4‐3. Design Storm I/I Analysis Summary   Site City Manhole Design Storm Peak I/I Response (mgd) ADWF (mgd) Basin Pipe Length (IDM) Peak I/I Response per ADWF (In MGD per MGD of basin ADWF) Peak I/I Response per IDM (In MGD per IDM of basin pipe) Site 1 11-333 5.57 0.98 214.7 5.57 0.0255 Site 2 11-332 4.99 0.99 515.2 4.99 0.0096 Site 3 11-331 2.48 0.62 81.4 2.48 0.0188 Site 4 11-352 2.32 4.18 320.5 2.32 0.0302 Site 5 12-378 4.44 0.67 84.7 4.44 0.0352 Site 6 Unknown 4.24 1.18 382.3 4.24 0.0130 The following I/I response item are noted:  Sites 1, 2 and 5 rank highest for Peak I/I response using the per-ADWF method. Sites 1, 4 and 5 rank highest for Peak I/I response using the per-IDM method. City of Santa Monica Sanitary Sewer Flow Monitoring and Inflow/Infiltration Study Conclusions and Recommendations 26 CONCLUSIONS AND 5.0 RECOMMENDATIONS  5.1 Conclusions  The flow monitoring and I/I analyses show the following: 1. Dry Weather Flow Monitoring: The capacity analysis in this study shows that the sewer system is in good condition on a capacity basis during this monitoring study. 2. Wet Weather I/I Analysis: Most of the I/I within the collection system comes from INFLOW. There was negligible rain dependent infiltration observed during this flow monitoring study and groundwater infiltration rates were below established typical values per WEF. 5.2 Recommendations  V&A advises that future I/I reduction plans consider the following recommendations if I/I is a concern to the City: 1. Determine I/I Reduction Program: The City should examine its I/I reduction needs to determine their strategy and goals for a future I/I reduction program. a. If peak flows, sanitary sewer overflows, and pipeline capacity issues are of greater concern, then priority can be given to investigate and reduce sources of inflow within the basins with higher normalized peak I/I responses. This would appear to be the greatest concern for the City collection system. b. If infiltration and general pipeline deterioration are of greater concern, then the program can be weighted to investigate and reduce sources of infiltration within the basins with higher normalized RDI responses. However, infiltration does not appear to be an issue for the City collection system. 2. I/I Investigation Methods: Potential I/I investigation methods include the following: a. Smoke testing: This method typically used to locate inflow sources. b. CCTV inspection: This method is typically used to locate condition assessment defects linked to infiltration sources. c. Mini-Basin Flow Monitoring: This method can be used to isolate smaller catchment areas in which to locate infiltration and inflow sources. 3. I/I Reduction Cost Effective Analysis: The City may wish to conduct a study to determine which is more cost-effective: (1) locating the sources of inflow/infiltration and systematically rehabilitating or replacing the faulty pipelines; or (2) continued treatment of the additional I/I flow. Appendix A APPENDIX A. 2016 DRY WEATHER FLOW  MONITORING SITES: DATA, GRAPHS,  INFORMATION   City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Monitoring Site:Monitoring Site:Monitoring Site:Monitoring Site: Location:Location: Location:Location: FM1 MH 10-254: Alley between 3rd and 4th Street, between Washington Avenue and California Avenue Temporary Monitoring: April 13 to April 24, 2016 Sanitary Sewer Flow Monitoring City of Santa MonicaCity of Santa MonicaCity of Santa MonicaCity of Santa Monica Vicinity Map: FM1Vicinity Map: FM1Vicinity Map: FM1Vicinity Map: FM1 Data Summary ReportData Summary ReportData Summary ReportData Summary Report FM1 - 1V&A Project No. 15-0346 Appendix A FM1FM1 FM1FM1 Site InformationSite InformationSite InformationSite Information City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Pipe Diameter:Pipe Diameter:Pipe Diameter:Pipe Diameter:12 inches ADWF:ADWF: ADWF:ADWF:0.394 mgd Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:0.759 mgd Flow SketchFlow SketchFlow SketchFlow Sketch Satellite MapSatellite MapSatellite MapSatellite Map Street ViewStreet ViewStreet ViewStreet View Sewer MapSewer Map Sewer MapSewer Map Location:Location: Location:Location:MH 10-254: Alley between 3rd and 4th Street, between Washington Avenue and California Avenue Coordinates:Coordinates:Coordinates:Coordinates:118.5012° W, 34.0208° N Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):120 feet Plan ViewPlan View Plan ViewPlan View V&A Project No. 15-0346 FM1 - 2Appendix A FM1FM1 FM1FM1 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Effluent PipeEffluent PipeEffluent PipeEffluent Pipe Influent PipeInfluent PipeInfluent PipeInfluent Pipe V&A Project No. 15-0346 FM1 - 3Appendix A FM 1 FM 1 F M 1 FM 1 Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0.0 0 0.0 5 0.1 0 0.1 5 0.2 0 0.2 5 0.3 0 0.3 5 0.4 0 0.4 5 0.5 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/24 F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0Rainfall (in/day) Re a l t i m e H o l i d a y Ra i n f a l l ADWF 0.0 0 0.0 5 0.1 0 0.1 5 0.2 0 0.2 5 0.3 0 0.3 5 0.4 0 0.4 5 0.5 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k e n d 0.0 0 0.0 5 0.1 0 0.1 5 0.2 0 0.2 5 0.3 0 0.3 5 0.4 0 0.4 5 0.5 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k d a y To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s T ot a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s Av g P e r i o d F l o w : 0 . 3 9 4 M G a l P e a k D a i l y F l o w : 0 . 4 31 M G a l M i n D a i l y F l o w : 0 . 3 4 3 M G a l Av g P e r i o d F l o w : 0 . 3 9 4 M G a l P e a k D a i l y F l o w : 0 . 4 3 1 M G a l M i n D a i l y F l o w : 0 . 3 4 3 M G a l Av g P e r i o d F l o w : 0 . 3 9 4 M G a l P e a k D a i l y F l o w : 0 . 4 3 1 M G a l M i n D a i l y F l o w : 0 . 3 4 3 M G a l Av g P e r i o d F l o w : 0 . 3 9 4 M G a l P e a k D a i l y F l o w : 0 . 4 3 1 M G a l M i n D a i l y F l o w : 0 . 3 4 3 M G a l V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM1 - 4 Ap p e n d i x A FM 1 FM 1 F M 1 FM 1 Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0. 0 0 0 0. 1 0 0 0. 2 0 0 0. 3 0 0 0. 4 0 0 0. 5 0 0 0. 6 0 0 0. 7 0 0 0. 8 0 0 0 : 0 0 1 : 0 0 2 : 0 0 3 : 0 0 4 : 0 0 5 : 0 0 6 : 0 0 7 : 0 0 8 : 0 0 9 : 0 0 1 0 : 0 0 1 1 : 0 0 1 2 : 0 0 1 3 : 0 0 1 4 : 0 0 1 5 : 0 0 1 6 : 0 0 1 7 : 0 0 1 8 : 0 0 1 9 : 0 0 2 0 : 0 0 2 1 : 0 0 2 2 : 0 0 2 3 : 0 0 F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Fr i d a y Fr i d a y F r i d a y Fr i d a y Sa t u r d a y Sa t u r d a y S a t u r d a y Sa t u r d a y Su n d a y Su n d a y S u n d a y Su n d a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y 0.394 mgdADWF:ADWF: ADWF:ADWF: V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM1 - 5 Ap p e n d i x A FM 1 FM 1 F M 1 FM 1 Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t Pe a k M e a s u r e d L e v e l : P ea k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : 3. 9 1 Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : 0. 3 3 Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : 12 in c h e s in c h e s Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Di a m e t e r 75 % d / D 50 % d / D 02468101214 0 4 / 1 3 0 4 / 1 5 0 4 / 1 7 0 4 / 1 9 0 4 / 2 1 04/23 L e v e l ( i n ) V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM1 - 6 Ap p e n d i x A FM1FM1 FM1FM1 Weekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow Hydrographs 4/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/2016 City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report 0 1 2 3 4 5 6 7 8 9 10 Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) LevLev LevLev 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) VelVel VelVel 0.0 0.2 0.4 0.6 0.8 1.0 1.2 4/13 4/14 4/15 4/16 4/17 4/18 4/19 4/20 4/21 4/22 4/23 4/24 Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Rain Flow ADWF Avg Level: 2.71 in. Peak Level: 3.91 in. Min Level: 1.14 in.Avg Level: 2.71 in. Peak Level: 3.91 in. Min Level: 1.14 in.Avg Level: 2.71 in. Peak Level: 3.91 in. Min Level: 1.14 in.Avg Level: 2.71 in. Peak Level: 3.91 in. Min Level: 1.14 in. Avg Velocity: 4.35 fps Peak Velocity: 5.55 fps Min Velocity: 2.54 fpsAvg Velocity: 4.35 fps Peak Velocity: 5.55 fps Min Velocity: 2.54 fpsAvg Velocity: 4.35 fps Peak Velocity: 5.55 fps Min Velocity: 2.54 fpsAvg Velocity: 4.35 fps Peak Velocity: 5.55 fps Min Velocity: 2.54 fps Avg Flow: 0.394 mgd Peak Flow: 0.759 mgd Min Flow: 0.083 mgdAvg Flow: 0.394 mgd Peak Flow: 0.759 mgd Min Flow: 0.083 mgdAvg Flow: 0.394 mgd Peak Flow: 0.759 mgd Min Flow: 0.083 mgdAvg Flow: 0.394 mgd Peak Flow: 0.759 mgd Min Flow: 0.083 mgd V&A Project No. 15-0346 FM1 - 7Appendix A City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Monitoring Site:Monitoring Site:Monitoring Site:Monitoring Site: Location:Location: Location:Location: FM3 MH 11-330: 2nd Street and Broadway Temporary Monitoring: April 13 to April 24, 2016 Sanitary Sewer Flow Monitoring City of Santa MonicaCity of Santa MonicaCity of Santa MonicaCity of Santa Monica Vicinity Map: FM3Vicinity Map: FM3Vicinity Map: FM3Vicinity Map: FM3 Data Summary ReportData Summary ReportData Summary ReportData Summary Report FM3 - 1V&A Project No. 15-0346 Appendix A FM3FM3 FM3FM3 Site InformationSite InformationSite InformationSite Information City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Pipe Diameter:Pipe Diameter:Pipe Diameter:Pipe Diameter:10 inches ADWF:ADWF: ADWF:ADWF:0.128 mgd Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:0.259 mgd Flow SketchFlow SketchFlow SketchFlow Sketch Satellite MapSatellite MapSatellite MapSatellite Map Street ViewStreet ViewStreet ViewStreet View Sewer MapSewer Map Sewer MapSewer Map Location:Location: Location:Location:MH 11-330: 2nd Street and Broadway Coordinates:Coordinates:Coordinates:Coordinates:118.4955° W, 34.0134° N Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):43 feet Plan ViewPlan View Plan ViewPlan View V&A Project No. 15-0346 FM3 - 2Appendix A FM3FM3 FM3FM3 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Effluent PipeEffluent PipeEffluent PipeEffluent Pipe Influent PipeInfluent PipeInfluent PipeInfluent Pipe V&A Project No. 15-0346 FM3 - 3Appendix A FM3FM3 FM3FM3 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Lateral PipeLateral PipeLateral PipeLateral Pipe V&A Project No. 15-0346 FM3 - 4Appendix A FM 3 FM 3 F M 3 FM 3 Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0.0 0 0.0 2 0.0 4 0.0 6 0.0 8 0.1 0 0.1 2 0.1 4 0.1 6 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/24 F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0Rainfall (in/day) Re a l t i m e H o l i d a y Ra i n f a l l ADWF 0.0 0 0.0 2 0.0 4 0.0 6 0.0 8 0.1 0 0.1 2 0.1 4 0.1 6 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k e n d 0.0 0 0.0 2 0.0 4 0.0 6 0.0 8 0.1 0 0.1 2 0.1 4 0.1 6 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k d a y To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s T ot a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s Av g P e r i o d F l o w : 0 . 1 2 7 M G a l P e a k D a i l y F l o w : 0 . 1 40 M G a l M i n D a i l y F l o w : 0 . 1 0 3 M G a l Av g P e r i o d F l o w : 0 . 1 2 7 M G a l P e a k D a i l y F l o w : 0 . 1 4 0 M G a l M i n D a i l y F l o w : 0 . 1 0 3 M G a l Av g P e r i o d F l o w : 0 . 1 2 7 M G a l P e a k D a i l y F l o w : 0 . 1 4 0 M G a l M i n D a i l y F l o w : 0 . 1 0 3 M G a l Av g P e r i o d F l o w : 0 . 1 2 7 M G a l P e a k D a i l y F l o w : 0 . 1 4 0 M G a l M i n D a i l y F l o w : 0 . 1 0 3 M G a l V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM3 - 5 Ap p e n d i x A FM 3 FM 3 F M 3 FM 3 Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0. 0 0 0 0. 0 5 0 0. 1 0 0 0. 1 5 0 0. 2 0 0 0. 2 5 0 0 : 0 0 1 : 0 0 2 : 0 0 3 : 0 0 4 : 0 0 5 : 0 0 6 : 0 0 7 : 0 0 8 : 0 0 9 : 0 0 1 0 : 0 0 1 1 : 0 0 1 2 : 0 0 1 3 : 0 0 1 4 : 0 0 1 5 : 0 0 1 6 : 0 0 1 7 : 0 0 1 8 : 0 0 1 9 : 0 0 2 0 : 0 0 2 1 : 0 0 2 2 : 0 0 2 3 : 0 0 F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Fr i d a y Fr i d a y F r i d a y Fr i d a y Sa t u r d a y Sa t u r d a y S a t u r d a y Sa t u r d a y Su n d a y Su n d a y S u n d a y Su n d a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y 0.128 mgdADWF:ADWF: ADWF:ADWF: V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM3 - 6 Ap p e n d i x A FM 3 FM 3 F M 3 FM 3 Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t Pe a k M e a s u r e d L e v e l : P ea k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : 5. 2 6 Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : 0. 5 3 Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : 10 in c h e s i nc h e s Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Di a m e t e r 75 % d / D 50 % d / D 024681012 0 4 / 1 3 0 4 / 1 5 0 4 / 1 7 0 4 / 1 9 0 4 / 2 1 04/23 L e v e l ( i n ) V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM3 - 7 Ap p e n d i x A FM3FM3 FM3FM3 Weekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow Hydrographs 4/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/2016 City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report 0 1 2 3 4 5 6 7 8 9 10 Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) LevLev LevLev 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) VelVel VelVel 0.0 0.1 0.1 0.2 0.2 0.3 0.3 0.4 0.4 4/13 4/14 4/15 4/16 4/17 4/18 4/19 4/20 4/21 4/22 4/23 4/24 Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Rain Flow ADWF Avg Level: 2.80 in. Peak Level: 5.26 in. Min Level: 1.06 in.Avg Level: 2.80 in. Peak Level: 5.26 in. Min Level: 1.06 in.Avg Level: 2.80 in. Peak Level: 5.26 in. Min Level: 1.06 in.Avg Level: 2.80 in. Peak Level: 5.26 in. Min Level: 1.06 in. Avg Velocity: 1.53 fps Peak Velocity: 2.70 fps Min Velocity: 0.61 fpsAvg Velocity: 1.53 fps Peak Velocity: 2.70 fps Min Velocity: 0.61 fpsAvg Velocity: 1.53 fps Peak Velocity: 2.70 fps Min Velocity: 0.61 fpsAvg Velocity: 1.53 fps Peak Velocity: 2.70 fps Min Velocity: 0.61 fps Avg Flow: 0.127 mgd Peak Flow: 0.259 mgd Min Flow: 0.014 mgdAvg Flow: 0.127 mgd Peak Flow: 0.259 mgd Min Flow: 0.014 mgdAvg Flow: 0.127 mgd Peak Flow: 0.259 mgd Min Flow: 0.014 mgdAvg Flow: 0.127 mgd Peak Flow: 0.259 mgd Min Flow: 0.014 mgd V&A Project No. 15-0346 FM3 - 8Appendix A City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Monitoring Site:Monitoring Site:Monitoring Site:Monitoring Site: Location:Location: Location:Location: FM4 MH 11-363A: Ocean Avenue at Moomat Ahiko Way Temporary Monitoring: April 13 to April 24, 2016 Sanitary Sewer Flow Monitoring City of Santa MonicaCity of Santa MonicaCity of Santa MonicaCity of Santa Monica Vicinity Map: FM4Vicinity Map: FM4Vicinity Map: FM4Vicinity Map: FM4 Data Summary ReportData Summary ReportData Summary ReportData Summary Report FM4 - 1V&A Project No. 15-0346 Appendix A FM4FM4 FM4FM4 Site InformationSite InformationSite InformationSite Information City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Pipe Diameter:Pipe Diameter:Pipe Diameter:Pipe Diameter:36 inches ADWF:ADWF: ADWF:ADWF:7.205 mgd Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:10.919 mgd Flow SketchFlow SketchFlow SketchFlow Sketch Satellite MapSatellite MapSatellite MapSatellite Map Street ViewStreet ViewStreet ViewStreet View Sewer MapSewer Map Sewer MapSewer Map Location:Location: Location:Location:MH 11-363A: Ocean Avenue at Moomat Ahiko Way Coordinates:Coordinates:Coordinates:Coordinates:118.4939° W, 34.0106° N Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):54 feet Plan ViewPlan View Plan ViewPlan View V&A Project No. 15-0346 FM4 - 2Appendix A FM4FM4 FM4FM4 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Effluent PipeEffluent PipeEffluent PipeEffluent Pipe Influent PipeInfluent PipeInfluent PipeInfluent Pipe V&A Project No. 15-0346 FM4 - 3Appendix A FM4FM4 FM4FM4 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Lateral PipeLateral PipeLateral PipeLateral Pipe V&A Project No. 15-0346 FM4 - 4Appendix A FM 4 FM 4 F M 4 FM 4 Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0.0 0 1.0 0 2.0 0 3.0 0 4.0 0 5.0 0 6.0 0 7.0 0 8.0 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/24 F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0Rainfall (in/day) Re a l t i m e H o l i d a y Ra i n f a l l ADWF 0.0 0 1.0 0 2.0 0 3.0 0 4.0 0 5.0 0 6.0 0 7.0 0 8.0 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k e n d 0.0 0 1.0 0 2.0 0 3.0 0 4.0 0 5.0 0 6.0 0 7.0 0 8.0 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k d a y To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s T ot a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s Av g P e r i o d F l o w : 7 . 1 3 5 M G a l P e a k D a i l y F l o w : 7 . 4 35 M G a l M i n D a i l y F l o w : 6 . 6 4 9 M G a l Av g P e r i o d F l o w : 7 . 1 3 5 M G a l P e a k D a i l y F l o w : 7 . 4 3 5 M G a l M i n D a i l y F l o w : 6 . 6 4 9 M G a l Av g P e r i o d F l o w : 7 . 1 3 5 M G a l P e a k D a i l y F l o w : 7 . 4 3 5 M G a l M i n D a i l y F l o w : 6 . 6 4 9 M G a l Av g P e r i o d F l o w : 7 . 1 3 5 M G a l P e a k D a i l y F l o w : 7 . 4 3 5 M G a l M i n D a i l y F l o w : 6 . 6 4 9 M G a l V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM4 - 5 Ap p e n d i x A FM 4 FM 4 F M 4 FM 4 Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0. 0 0 0 2. 0 0 0 4. 0 0 0 6. 0 0 0 8. 0 0 0 10 . 0 0 0 12 . 0 0 0 0 : 0 0 1 : 0 0 2 : 0 0 3 : 0 0 4 : 0 0 5 : 0 0 6 : 0 0 7 : 0 0 8 : 0 0 9 : 0 0 1 0 : 0 0 1 1 : 0 0 1 2 : 0 0 1 3 : 0 0 1 4 : 0 0 1 5 : 0 0 1 6 : 0 0 1 7 : 0 0 1 8 : 0 0 1 9 : 0 0 2 0 : 0 0 2 1 : 0 0 2 2 : 0 0 2 3 : 0 0 F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Fr i d a y Fr i d a y F r i d a y Fr i d a y Sa t u r d a y Sa t u r d a y S a t u r d a y Sa t u r d a y Su n d a y Su n d a y S u n d a y Su n d a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y 7.205 mgdADWF:ADWF: ADWF:ADWF: V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM4 - 6 Ap p e n d i x A FM 4 FM 4 F M 4 FM 4 Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t Pe a k M e a s u r e d L e v e l : P ea k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : 16 . 6 Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : 0. 4 6 Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : 36 in c h e s i nc h e s Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Di a m e t e r 75 % d / D 50 % d / D 0510152025303540 0 4 / 1 3 0 4 / 1 5 0 4 / 1 7 0 4 / 1 9 0 4 / 2 1 04/23 L e v e l ( i n ) V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM4 - 7 Ap p e n d i x A FM4FM4 FM4FM4 Weekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow Hydrographs 4/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/2016 City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report 0 5 10 15 20 25 30 Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) LevLev LevLev 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) VelVel VelVel 0 2 4 6 8 10 12 14 16 18 4/13 4/14 4/15 4/16 4/17 4/18 4/19 4/20 4/21 4/22 4/23 4/24 Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Rain Flow ADWF Avg Level: 13.19 in. Peak Level: 16.55 in. Min Level: 8.74 in.Avg Level: 13.19 in. Peak Level: 16.55 in. Min Level: 8.74 in.Avg Level: 13.19 in. Peak Level: 16.55 in. Min Level: 8.74 in.Avg Level: 13.19 in. Peak Level: 16.55 in. Min Level: 8.74 in. Avg Velocity: 4.56 fps Peak Velocity: 5.51 fps Min Velocity: 3.23 fpsAvg Velocity: 4.56 fps Peak Velocity: 5.51 fps Min Velocity: 3.23 fpsAvg Velocity: 4.56 fps Peak Velocity: 5.51 fps Min Velocity: 3.23 fpsAvg Velocity: 4.56 fps Peak Velocity: 5.51 fps Min Velocity: 3.23 fps Avg Flow: 7.135 mgd Peak Flow: 10.919 mgd Min Flow: 2.806 mgdAvg Flow: 7.135 mgd Peak Flow: 10.919 mgd Min Flow: 2.806 mgdAvg Flow: 7.135 mgd Peak Flow: 10.919 mgd Min Flow: 2.806 mgdAvg Flow: 7.135 mgd Peak Flow: 10.919 mgd Min Flow: 2.806 mgd V&A Project No. 15-0346 FM4 - 8Appendix A City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Monitoring Site:Monitoring Site:Monitoring Site:Monitoring Site: Location:Location: Location:Location: FM6 MH 17-711: Colorado Avenue at Lincoln Court Temporary Monitoring: April 13 to April 24, 2016 Sanitary Sewer Flow Monitoring City of Santa MonicaCity of Santa MonicaCity of Santa MonicaCity of Santa Monica Vicinity Map: FM6Vicinity Map: FM6Vicinity Map: FM6Vicinity Map: FM6 Data Summary ReportData Summary ReportData Summary ReportData Summary Report FM6 - 1V&A Project No. 15-0346 Appendix A FM6FM6 FM6FM6 Site InformationSite InformationSite InformationSite Information City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Pipe Diameter:Pipe Diameter:Pipe Diameter:Pipe Diameter:29 inches ADWF:ADWF: ADWF:ADWF:0.894 mgd Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:1.483 mgd Flow SketchFlow SketchFlow SketchFlow Sketch Satellite MapSatellite MapSatellite MapSatellite Map Street ViewStreet ViewStreet ViewStreet View Sewer MapSewer Map Sewer MapSewer Map Location:Location: Location:Location:MH 17-711: Colorado Avenue at Lincoln Court Coordinates:Coordinates:Coordinates:Coordinates:118.4877° W, 34.0172° N Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):91 feet Plan ViewPlan View Plan ViewPlan View V&A Project No. 15-0346 FM6 - 2Appendix A FM6FM6 FM6FM6 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Effluent PipeEffluent PipeEffluent PipeEffluent Pipe Influent PipeInfluent PipeInfluent PipeInfluent Pipe V&A Project No. 15-0346 FM6 - 3Appendix A FM 6 FM 6 F M 6 FM 6 Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0.0 0 0.2 0 0.4 0 0.6 0 0.8 0 1.0 0 1.2 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/24 F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0Rainfall (in/day) Re a l t i m e H o l i d a y Ra i n f a l l ADWF 0.0 0 0.2 0 0.4 0 0.6 0 0.8 0 1.0 0 1.2 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k e n d 0.0 0 0.2 0 0.4 0 0.6 0 0.8 0 1.0 0 1.2 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k d a y To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s T ot a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s Av g P e r i o d F l o w : 0 . 8 9 0 M G a l P e a k D a i l y F l o w : 0 . 9 62 M G a l M i n D a i l y F l o w : 0 . 8 1 9 M G a l Av g P e r i o d F l o w : 0 . 8 9 0 M G a l P e a k D a i l y F l o w : 0 . 9 6 2 M G a l M i n D a i l y F l o w : 0 . 8 1 9 M G a l Av g P e r i o d F l o w : 0 . 8 9 0 M G a l P e a k D a i l y F l o w : 0 . 9 6 2 M G a l M i n D a i l y F l o w : 0 . 8 1 9 M G a l Av g P e r i o d F l o w : 0 . 8 9 0 M G a l P e a k D a i l y F l o w : 0 . 9 6 2 M G a l M i n D a i l y F l o w : 0 . 8 1 9 M G a l V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM6 - 4 Ap p e n d i x A FM 6 FM 6 F M 6 FM 6 Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0. 0 0 0 0. 2 0 0 0. 4 0 0 0. 6 0 0 0. 8 0 0 1. 0 0 0 1. 2 0 0 1. 4 0 0 0 : 0 0 1 : 0 0 2 : 0 0 3 : 0 0 4 : 0 0 5 : 0 0 6 : 0 0 7 : 0 0 8 : 0 0 9 : 0 0 1 0 : 0 0 1 1 : 0 0 1 2 : 0 0 1 3 : 0 0 1 4 : 0 0 1 5 : 0 0 1 6 : 0 0 1 7 : 0 0 1 8 : 0 0 1 9 : 0 0 2 0 : 0 0 2 1 : 0 0 2 2 : 0 0 2 3 : 0 0 F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Fr i d a y Fr i d a y F r i d a y Fr i d a y Sa t u r d a y Sa t u r d a y S a t u r d a y Sa t u r d a y Su n d a y Su n d a y S u n d a y Su n d a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y 0.894 mgdADWF:ADWF: ADWF:ADWF: V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM6 - 5 Ap p e n d i x A FM 6 FM 6 F M 6 FM 6 Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t Pe a k M e a s u r e d L e v e l : P ea k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : 12 . 1 Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : 0. 4 2 Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : 29 in c h e s i nc h e s Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Di a m e t e r 75 % d / D 50 % d / D 05101520253035 0 4 / 1 3 0 4 / 1 5 0 4 / 1 7 0 4 / 1 9 0 4 / 2 1 04/23 L e v e l ( i n ) V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM6 - 6 Ap p e n d i x A FM6FM6 FM6FM6 Weekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow Hydrographs 4/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/2016 City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report 0 2 4 6 8 10 12 14 16 18 20 Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) LevLev LevLev 0.0 0.5 1.0 1.5 2.0 2.5 Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) VelVel VelVel 0.0 0.5 1.0 1.5 2.0 2.5 4/13 4/14 4/15 4/16 4/17 4/18 4/19 4/20 4/21 4/22 4/23 4/24 Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Rain Flow ADWF Avg Level: 10.67 in. Peak Level: 12.13 in. Min Level: 8.66 in.Avg Level: 10.67 in. Peak Level: 12.13 in. Min Level: 8.66 in.Avg Level: 10.67 in. Peak Level: 12.13 in. Min Level: 8.66 in.Avg Level: 10.67 in. Peak Level: 12.13 in. Min Level: 8.66 in. Avg Velocity: 0.98 fps Peak Velocity: 1.37 fps Min Velocity: 0.60 fpsAvg Velocity: 0.98 fps Peak Velocity: 1.37 fps Min Velocity: 0.60 fpsAvg Velocity: 0.98 fps Peak Velocity: 1.37 fps Min Velocity: 0.60 fpsAvg Velocity: 0.98 fps Peak Velocity: 1.37 fps Min Velocity: 0.60 fps Avg Flow: 0.890 mgd Peak Flow: 1.483 mgd Min Flow: 0.394 mgdAvg Flow: 0.890 mgd Peak Flow: 1.483 mgd Min Flow: 0.394 mgdAvg Flow: 0.890 mgd Peak Flow: 1.483 mgd Min Flow: 0.394 mgdAvg Flow: 0.890 mgd Peak Flow: 1.483 mgd Min Flow: 0.394 mgd V&A Project No. 15-0346 FM6 - 7Appendix A City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Monitoring Site:Monitoring Site:Monitoring Site:Monitoring Site: Location:Location: Location:Location: FM7 MH 31-1481: 17th Court between Santa Monica Boulevard and Broadway Temporary Monitoring: April 13 to April 24, 2016 Sanitary Sewer Flow Monitoring City of Santa MonicaCity of Santa MonicaCity of Santa MonicaCity of Santa Monica Vicinity Map: FM7Vicinity Map: FM7Vicinity Map: FM7Vicinity Map: FM7 Data Summary ReportData Summary ReportData Summary ReportData Summary Report FM7 - 1V&A Project No. 15-0346 Appendix A FM7FM7 FM7FM7 Site InformationSite InformationSite InformationSite Information City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Pipe Diameter:Pipe Diameter:Pipe Diameter:Pipe Diameter:12 inches ADWF:ADWF: ADWF:ADWF:0.105 mgd Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:0.255 mgd Flow SketchFlow SketchFlow SketchFlow Sketch Satellite MapSatellite MapSatellite MapSatellite Map Street ViewStreet ViewStreet ViewStreet View Sewer MapSewer Map Sewer MapSewer Map Location:Location: Location:Location:MH 31-1481: 17th Court between Santa Monica Boulevard and Broadway Coordinates:Coordinates:Coordinates:Coordinates:118.4817° W, 34.0261° N Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):138 feet Plan ViewPlan View Plan ViewPlan View V&A Project No. 15-0346 FM7 - 2Appendix A FM7FM7 FM7FM7 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Effluent PipeEffluent PipeEffluent PipeEffluent Pipe Influent PipeInfluent PipeInfluent PipeInfluent Pipe V&A Project No. 15-0346 FM7 - 3Appendix A FM 7 FM 7 F M 7 FM 7 Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0.0 0 0.0 2 0.0 4 0.0 6 0.0 8 0.1 0 0.1 2 0.1 4 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/24 F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0Rainfall (in/day) Re a l t i m e H o l i d a y Ra i n f a l l ADWF 0.0 0 0.0 2 0.0 4 0.0 6 0.0 8 0.1 0 0.1 2 0.1 4 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k e n d 0.0 0 0.0 2 0.0 4 0.0 6 0.0 8 0.1 0 0.1 2 0.1 4 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k d a y To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s T ot a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s Av g P e r i o d F l o w : 0 . 1 0 5 M G a l P e a k D a i l y F l o w : 0 . 1 21 M G a l M i n D a i l y F l o w : 0 . 0 9 1 M G a l Av g P e r i o d F l o w : 0 . 1 0 5 M G a l P e a k D a i l y F l o w : 0 . 1 2 1 M G a l M i n D a i l y F l o w : 0 . 0 9 1 M G a l Av g P e r i o d F l o w : 0 . 1 0 5 M G a l P e a k D a i l y F l o w : 0 . 1 2 1 M G a l M i n D a i l y F l o w : 0 . 0 9 1 M G a l Av g P e r i o d F l o w : 0 . 1 0 5 M G a l P e a k D a i l y F l o w : 0 . 1 2 1 M G a l M i n D a i l y F l o w : 0 . 0 9 1 M G a l V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM7 - 4 Ap p e n d i x A FM 7 FM 7 F M 7 FM 7 Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0. 0 0 0 0. 0 5 0 0. 1 0 0 0. 1 5 0 0. 2 0 0 0. 2 5 0 0 : 0 0 1 : 0 0 2 : 0 0 3 : 0 0 4 : 0 0 5 : 0 0 6 : 0 0 7 : 0 0 8 : 0 0 9 : 0 0 1 0 : 0 0 1 1 : 0 0 1 2 : 0 0 1 3 : 0 0 1 4 : 0 0 1 5 : 0 0 1 6 : 0 0 1 7 : 0 0 1 8 : 0 0 1 9 : 0 0 2 0 : 0 0 2 1 : 0 0 2 2 : 0 0 2 3 : 0 0 F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Fr i d a y Fr i d a y F r i d a y Fr i d a y Sa t u r d a y Sa t u r d a y S a t u r d a y Sa t u r d a y Su n d a y Su n d a y S u n d a y Su n d a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y 0.105 mgdADWF:ADWF: ADWF:ADWF: V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM7 - 5 Ap p e n d i x A FM 7 FM 7 F M 7 FM 7 Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t Pe a k M e a s u r e d L e v e l : P ea k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : 5. 4 9 Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : 0. 4 6 Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : 12 in c h e s i nc h e s Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Di a m e t e r 75 % d / D 50 % d / D 02468101214 0 4 / 1 3 0 4 / 1 5 0 4 / 1 7 0 4 / 1 9 0 4 / 2 1 04/23 L e v e l ( i n ) V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM7 - 6 Ap p e n d i x A FM7FM7 FM7FM7 Weekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow Hydrographs 4/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/2016 City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report 0 1 2 3 4 5 6 7 8 9 10 Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) LevLev LevLev 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) VelVel VelVel 0.0 0.1 0.1 0.2 0.2 0.3 0.3 0.4 0.4 4/13 4/14 4/15 4/16 4/17 4/18 4/19 4/20 4/21 4/22 4/23 4/24 Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Rain Flow ADWF Avg Level: 3.52 in. Peak Level: 5.49 in. Min Level: 1.72 in.Avg Level: 3.52 in. Peak Level: 5.49 in. Min Level: 1.72 in.Avg Level: 3.52 in. Peak Level: 5.49 in. Min Level: 1.72 in.Avg Level: 3.52 in. Peak Level: 5.49 in. Min Level: 1.72 in. Avg Velocity: 0.79 fps Peak Velocity: 1.17 fps Min Velocity: 0.19 fpsAvg Velocity: 0.79 fps Peak Velocity: 1.17 fps Min Velocity: 0.19 fpsAvg Velocity: 0.79 fps Peak Velocity: 1.17 fps Min Velocity: 0.19 fpsAvg Velocity: 0.79 fps Peak Velocity: 1.17 fps Min Velocity: 0.19 fps Avg Flow: 0.105 mgd Peak Flow: 0.255 mgd Min Flow: 0.015 mgdAvg Flow: 0.105 mgd Peak Flow: 0.255 mgd Min Flow: 0.015 mgdAvg Flow: 0.105 mgd Peak Flow: 0.255 mgd Min Flow: 0.015 mgdAvg Flow: 0.105 mgd Peak Flow: 0.255 mgd Min Flow: 0.015 mgd V&A Project No. 15-0346 FM7 - 7Appendix A City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Monitoring Site:Monitoring Site:Monitoring Site:Monitoring Site: Location:Location: Location:Location: FM9 MH 31-1529: Colorado Avenue at 19th Court Temporary Monitoring: April 13 to April 24, 2016 Sanitary Sewer Flow Monitoring City of Santa MonicaCity of Santa MonicaCity of Santa MonicaCity of Santa Monica Vicinity Map: FM9Vicinity Map: FM9Vicinity Map: FM9Vicinity Map: FM9 Data Summary ReportData Summary ReportData Summary ReportData Summary Report FM9 - 1V&A Project No. 15-0346 Appendix A FM9FM9 FM9FM9 Site InformationSite InformationSite InformationSite Information City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Pipe Diameter:Pipe Diameter:Pipe Diameter:Pipe Diameter:21 inches ADWF:ADWF: ADWF:ADWF:0.977 mgd Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:1.747 mgd Flow SketchFlow SketchFlow SketchFlow Sketch Satellite MapSatellite MapSatellite MapSatellite Map Street ViewStreet ViewStreet ViewStreet View Sewer MapSewer Map Sewer MapSewer Map Location:Location: Location:Location:MH 31-1529: Colorado Avenue at 19th Court Coordinates:Coordinates:Coordinates:Coordinates:118.4774° W, 34.0256° N Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):136 feet Plan ViewPlan View Plan ViewPlan View V&A Project No. 15-0346 FM9 - 2Appendix A FM9FM9 FM9FM9 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Effluent PipeEffluent PipeEffluent PipeEffluent Pipe Influent PipeInfluent PipeInfluent PipeInfluent Pipe V&A Project No. 15-0346 FM9 - 3Appendix A FM9FM9 FM9FM9 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Lower Lateral PipeLower Lateral PipeLower Lateral PipeLower Lateral Pipe Upper Lateral PipeUpper Lateral PipeUpper Lateral PipeUpper Lateral Pipe V&A Project No. 15-0346 FM9 - 4Appendix A FM 9 FM 9 F M 9 FM 9 Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0.0 0 0.2 0 0.4 0 0.6 0 0.8 0 1.0 0 1.2 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/24 F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0Rainfall (in/day) Re a l t i m e H o l i d a y Ra i n f a l l ADWF 0.0 0 0.2 0 0.4 0 0.6 0 0.8 0 1.0 0 1.2 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k e n d 0.0 0 0.2 0 0.4 0 0.6 0 0.8 0 1.0 0 1.2 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k d a y To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s T ot a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s Av g P e r i o d F l o w : 0 . 9 7 2 M G a l P e a k D a i l y F l o w : 1 . 0 65 M G a l M i n D a i l y F l o w : 0 . 9 0 3 M G a l Av g P e r i o d F l o w : 0 . 9 7 2 M G a l P e a k D a i l y F l o w : 1 . 0 6 5 M G a l M i n D a i l y F l o w : 0 . 9 0 3 M G a l Av g P e r i o d F l o w : 0 . 9 7 2 M G a l P e a k D a i l y F l o w : 1 . 0 6 5 M G a l M i n D a i l y F l o w : 0 . 9 0 3 M G a l Av g P e r i o d F l o w : 0 . 9 7 2 M G a l P e a k D a i l y F l o w : 1 . 0 6 5 M G a l M i n D a i l y F l o w : 0 . 9 0 3 M G a l V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM9 - 5 Ap p e n d i x A FM 9 FM 9 F M 9 FM 9 Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0. 0 0 0 0. 2 0 0 0. 4 0 0 0. 6 0 0 0. 8 0 0 1. 0 0 0 1. 2 0 0 1. 4 0 0 1. 6 0 0 1. 8 0 0 0 : 0 0 1 : 0 0 2 : 0 0 3 : 0 0 4 : 0 0 5 : 0 0 6 : 0 0 7 : 0 0 8 : 0 0 9 : 0 0 1 0 : 0 0 1 1 : 0 0 1 2 : 0 0 1 3 : 0 0 1 4 : 0 0 1 5 : 0 0 1 6 : 0 0 1 7 : 0 0 1 8 : 0 0 1 9 : 0 0 2 0 : 0 0 2 1 : 0 0 2 2 : 0 0 2 3 : 0 0 F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Fr i d a y Fr i d a y F r i d a y Fr i d a y Sa t u r d a y Sa t u r d a y S a t u r d a y Sa t u r d a y Su n d a y Su n d a y S u n d a y Su n d a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y 0.977 mgdADWF:ADWF: ADWF:ADWF: V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM9 - 6 Ap p e n d i x A FM 9 FM 9 F M 9 FM 9 Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t Pe a k M e a s u r e d L e v e l : P ea k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : 4. 8 9 Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : 0. 2 3 Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : 21 in c h e s i nc h e s Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Di a m e t e r 75 % d / D 50 % d / D 0510152025 0 4 / 1 3 0 4 / 1 5 0 4 / 1 7 0 4 / 1 9 0 4 / 2 1 04/23 L e v e l ( i n ) V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM9 - 7 Ap p e n d i x A FM9FM9 FM9FM9 Weekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow Hydrographs 4/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/2016 City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report 0 1 2 3 4 5 6 7 8 9 10 Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) LevLev LevLev 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) VelVel VelVel 0.0 0.5 1.0 1.5 2.0 2.5 3.0 4/13 4/14 4/15 4/16 4/17 4/18 4/19 4/20 4/21 4/22 4/23 4/24 Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Rain Flow ADWF Avg Level: 3.63 in. Peak Level: 4.89 in. Min Level: 2.26 in.Avg Level: 3.63 in. Peak Level: 4.89 in. Min Level: 2.26 in.Avg Level: 3.63 in. Peak Level: 4.89 in. Min Level: 2.26 in.Avg Level: 3.63 in. Peak Level: 4.89 in. Min Level: 2.26 in. Avg Velocity: 5.19 fps Peak Velocity: 6.61 fps Min Velocity: 2.98 fpsAvg Velocity: 5.19 fps Peak Velocity: 6.61 fps Min Velocity: 2.98 fpsAvg Velocity: 5.19 fps Peak Velocity: 6.61 fps Min Velocity: 2.98 fpsAvg Velocity: 5.19 fps Peak Velocity: 6.61 fps Min Velocity: 2.98 fps Avg Flow: 0.972 mgd Peak Flow: 1.747 mgd Min Flow: 0.279 mgdAvg Flow: 0.972 mgd Peak Flow: 1.747 mgd Min Flow: 0.279 mgdAvg Flow: 0.972 mgd Peak Flow: 1.747 mgd Min Flow: 0.279 mgdAvg Flow: 0.972 mgd Peak Flow: 1.747 mgd Min Flow: 0.279 mgd V&A Project No. 15-0346 FM9 - 8Appendix A City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Monitoring Site:Monitoring Site:Monitoring Site:Monitoring Site: Location:Location: Location:Location: FM10 MH 40-1974: Michigan Avenue at Cloverfield Boulevard Temporary Monitoring: April 13 to April 24, 2016 Sanitary Sewer Flow Monitoring City of Santa MonicaCity of Santa MonicaCity of Santa MonicaCity of Santa Monica Vicinity Map: FM10Vicinity Map: FM10Vicinity Map: FM10Vicinity Map: FM10 Data Summary ReportData Summary ReportData Summary ReportData Summary Report FM10 - 1V&A Project No. 15-0346 Appendix A FM10FM10 FM10FM10 Site InformationSite InformationSite InformationSite Information City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Pipe Diameter:Pipe Diameter:Pipe Diameter:Pipe Diameter:18 inches ADWF:ADWF: ADWF:ADWF:0.585 mgd Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:1.040 mgd Flow SketchFlow SketchFlow SketchFlow Sketch Satellite MapSatellite MapSatellite MapSatellite Map Street ViewStreet ViewStreet ViewStreet View Sewer MapSewer Map Sewer MapSewer Map Location:Location: Location:Location:MH 40-1974: Michigan Avenue at Cloverfield Boulevard Coordinates:Coordinates:Coordinates:Coordinates:118.4704° W, 34.0255° N Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):155 feet Plan ViewPlan View Plan ViewPlan View V&A Project No. 15-0346 FM10 - 2Appendix A FM10FM10 FM10FM10 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Effluent PipeEffluent PipeEffluent PipeEffluent Pipe Influent PipeInfluent PipeInfluent PipeInfluent Pipe V&A Project No. 15-0346 FM10 - 3Appendix A FM10FM10 FM10FM10 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Lateral PipeLateral PipeLateral PipeLateral Pipe V&A Project No. 15-0346 FM10 - 4Appendix A FM 1 0 FM 1 0 F M 1 0 FM 1 0 Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0.0 0 0.1 0 0.2 0 0.3 0 0.4 0 0.5 0 0.6 0 0.7 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/24 F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0Rainfall (in/day) Re a l t i m e H o l i d a y Ra i n f a l l ADWF 0.0 0 0.1 0 0.2 0 0.3 0 0.4 0 0.5 0 0.6 0 0.7 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k e n d 0.0 0 0.1 0 0.2 0 0.3 0 0.4 0 0.5 0 0.6 0 0.7 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k d a y To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s T ot a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s Av g P e r i o d F l o w : 0 . 5 8 1 M G a l P e a k D a i l y F l o w : 0 . 6 34 M G a l M i n D a i l y F l o w : 0 . 5 3 7 M G a l Av g P e r i o d F l o w : 0 . 5 8 1 M G a l P e a k D a i l y F l o w : 0 . 6 3 4 M G a l M i n D a i l y F l o w : 0 . 5 3 7 M G a l Av g P e r i o d F l o w : 0 . 5 8 1 M G a l P e a k D a i l y F l o w : 0 . 6 3 4 M G a l M i n D a i l y F l o w : 0 . 5 3 7 M G a l Av g P e r i o d F l o w : 0 . 5 8 1 M G a l P e a k D a i l y F l o w : 0 . 6 3 4 M G a l M i n D a i l y F l o w : 0 . 5 3 7 M G a l V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM10 - 5 Ap p e n d i x A FM 1 0 FM 1 0 F M 1 0 FM 1 0 Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0. 0 0 0 0. 1 0 0 0. 2 0 0 0. 3 0 0 0. 4 0 0 0. 5 0 0 0. 6 0 0 0. 7 0 0 0. 8 0 0 0. 9 0 0 1. 0 0 0 0 : 0 0 1 : 0 0 2 : 0 0 3 : 0 0 4 : 0 0 5 : 0 0 6 : 0 0 7 : 0 0 8 : 0 0 9 : 0 0 1 0 : 0 0 1 1 : 0 0 1 2 : 0 0 1 3 : 0 0 1 4 : 0 0 1 5 : 0 0 1 6 : 0 0 1 7 : 0 0 1 8 : 0 0 1 9 : 0 0 2 0 : 0 0 2 1 : 0 0 2 2 : 0 0 2 3 : 0 0 F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Fr i d a y Fr i d a y F r i d a y Fr i d a y Sa t u r d a y Sa t u r d a y S a t u r d a y Sa t u r d a y Su n d a y Su n d a y S u n d a y Su n d a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y 0.585 mgdADWF:ADWF: ADWF:ADWF: V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM10 - 6 Ap p e n d i x A FM 1 0 FM 1 0 F M 1 0 FM 1 0 Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t Pe a k M e a s u r e d L e v e l : P ea k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : 9. 0 5 Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : 0. 5 0 Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : 18 in c h e s i nc h e s Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Di a m e t e r 75 % d / D 50 % d / D 02468101214161820 0 4 / 1 3 0 4 / 1 5 0 4 / 1 7 0 4 / 1 9 0 4 / 2 1 04/23 L e v e l ( i n ) V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM10 - 7 Ap p e n d i x A FM10FM10 FM10FM10 Weekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow Hydrographs 4/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/2016 City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report 0 2 4 6 8 10 12 14 Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) LevLev LevLev 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) VelVel VelVel 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 4/13 4/14 4/15 4/16 4/17 4/18 4/19 4/20 4/21 4/22 4/23 4/24 Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Rain Flow ADWF Avg Level: 6.98 in. Peak Level: 9.05 in. Min Level: 4.80 in.Avg Level: 6.98 in. Peak Level: 9.05 in. Min Level: 4.80 in.Avg Level: 6.98 in. Peak Level: 9.05 in. Min Level: 4.80 in.Avg Level: 6.98 in. Peak Level: 9.05 in. Min Level: 4.80 in. Avg Velocity: 1.39 fps Peak Velocity: 1.90 fps Min Velocity: 0.93 fpsAvg Velocity: 1.39 fps Peak Velocity: 1.90 fps Min Velocity: 0.93 fpsAvg Velocity: 1.39 fps Peak Velocity: 1.90 fps Min Velocity: 0.93 fpsAvg Velocity: 1.39 fps Peak Velocity: 1.90 fps Min Velocity: 0.93 fps Avg Flow: 0.581 mgd Peak Flow: 1.040 mgd Min Flow: 0.235 mgdAvg Flow: 0.581 mgd Peak Flow: 1.040 mgd Min Flow: 0.235 mgdAvg Flow: 0.581 mgd Peak Flow: 1.040 mgd Min Flow: 0.235 mgdAvg Flow: 0.581 mgd Peak Flow: 1.040 mgd Min Flow: 0.235 mgd V&A Project No. 15-0346 FM10 - 8Appendix A City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Monitoring Site:Monitoring Site:Monitoring Site:Monitoring Site: Location:Location: Location:Location: FM11 MH 46-2249: 26th Street between Broadway and Colorado Avenue Temporary Monitoring: April 13 to April 24, 2016 Sanitary Sewer Flow Monitoring City of Santa MonicaCity of Santa MonicaCity of Santa MonicaCity of Santa Monica Vicinity Map: FM11Vicinity Map: FM11Vicinity Map: FM11Vicinity Map: FM11 Data Summary ReportData Summary ReportData Summary ReportData Summary Report FM11 - 1V&A Project No. 15-0346 Appendix A FM11FM11 FM11FM11 Site InformationSite InformationSite InformationSite Information City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Pipe Diameter:Pipe Diameter:Pipe Diameter:Pipe Diameter:27 inches ADWF:ADWF: ADWF:ADWF:0.910 mgd Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:1.508 mgd Flow SketchFlow SketchFlow SketchFlow Sketch Satellite MapSatellite MapSatellite MapSatellite Map Street ViewStreet ViewStreet ViewStreet View Sewer MapSewer Map Sewer MapSewer Map Location:Location: Location:Location:MH 46-2249: 26th Street between Broadway and Colorado Avenue Coordinates:Coordinates:Coordinates:Coordinates:118.4719° W, 34.0312° N Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):157 feet Plan ViewPlan View Plan ViewPlan View V&A Project No. 15-0346 FM11 - 2Appendix A FM11FM11 FM11FM11 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Effluent PipeEffluent PipeEffluent PipeEffluent Pipe Influent PipeInfluent PipeInfluent PipeInfluent Pipe V&A Project No. 15-0346 FM11 - 3Appendix A FM 1 1 FM 1 1 F M 1 1 FM 1 1 Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0.0 0 0.2 0 0.4 0 0.6 0 0.8 0 1.0 0 1.2 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/24 F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0Rainfall (in/day) Re a l t i m e H o l i d a y Ra i n f a l l ADWF 0.0 0 0.2 0 0.4 0 0.6 0 0.8 0 1.0 0 1.2 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k e n d 0.0 0 0.2 0 0.4 0 0.6 0 0.8 0 1.0 0 1.2 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k d a y To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s T ot a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s Av g P e r i o d F l o w : 0 . 9 0 9 M G a l P e a k D a i l y F l o w : 0 . 9 69 M G a l M i n D a i l y F l o w : 0 . 8 3 1 M G a l Av g P e r i o d F l o w : 0 . 9 0 9 M G a l P e a k D a i l y F l o w : 0 . 9 6 9 M G a l M i n D a i l y F l o w : 0 . 8 3 1 M G a l Av g P e r i o d F l o w : 0 . 9 0 9 M G a l P e a k D a i l y F l o w : 0 . 9 6 9 M G a l M i n D a i l y F l o w : 0 . 8 3 1 M G a l Av g P e r i o d F l o w : 0 . 9 0 9 M G a l P e a k D a i l y F l o w : 0 . 9 6 9 M G a l M i n D a i l y F l o w : 0 . 8 3 1 M G a l V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM11 - 4 Ap p e n d i x A FM 1 1 FM 1 1 F M 1 1 FM 1 1 Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0. 0 0 0 0. 2 0 0 0. 4 0 0 0. 6 0 0 0. 8 0 0 1. 0 0 0 1. 2 0 0 1. 4 0 0 1. 6 0 0 0 : 0 0 1 : 0 0 2 : 0 0 3 : 0 0 4 : 0 0 5 : 0 0 6 : 0 0 7 : 0 0 8 : 0 0 9 : 0 0 1 0 : 0 0 1 1 : 0 0 1 2 : 0 0 1 3 : 0 0 1 4 : 0 0 1 5 : 0 0 1 6 : 0 0 1 7 : 0 0 1 8 : 0 0 1 9 : 0 0 2 0 : 0 0 2 1 : 0 0 2 2 : 0 0 2 3 : 0 0 F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Fr i d a y Fr i d a y F r i d a y Fr i d a y Sa t u r d a y Sa t u r d a y S a t u r d a y Sa t u r d a y Su n d a y Su n d a y S u n d a y Su n d a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y 0.910 mgdADWF:ADWF: ADWF:ADWF: V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM11 - 5 Ap p e n d i x A FM 1 1 FM 1 1 F M 1 1 FM 1 1 Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t Pe a k M e a s u r e d L e v e l : P ea k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : 4. 6 5 Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : 0. 1 7 Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : 27 in c h e s i nc h e s Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Di a m e t e r 75 % d / D 50 % d / D 051015202530 0 4 / 1 3 0 4 / 1 5 0 4 / 1 7 0 4 / 1 9 0 4 / 2 1 04/23 L e v e l ( i n ) V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM11 - 6 Ap p e n d i x A FM11FM11 FM11FM11 Weekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow Hydrographs 4/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/2016 City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report 0 1 2 3 4 5 6 7 8 9 10 Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) LevLev LevLev 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) VelVel VelVel 0.0 0.5 1.0 1.5 2.0 2.5 4/13 4/14 4/15 4/16 4/17 4/18 4/19 4/20 4/21 4/22 4/23 4/24 Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Rain Flow ADWF Avg Level: 3.48 in. Peak Level: 4.65 in. Min Level: 2.50 in.Avg Level: 3.48 in. Peak Level: 4.65 in. Min Level: 2.50 in.Avg Level: 3.48 in. Peak Level: 4.65 in. Min Level: 2.50 in.Avg Level: 3.48 in. Peak Level: 4.65 in. Min Level: 2.50 in. Avg Velocity: 4.57 fps Peak Velocity: 5.47 fps Min Velocity: 2.25 fpsAvg Velocity: 4.57 fps Peak Velocity: 5.47 fps Min Velocity: 2.25 fpsAvg Velocity: 4.57 fps Peak Velocity: 5.47 fps Min Velocity: 2.25 fpsAvg Velocity: 4.57 fps Peak Velocity: 5.47 fps Min Velocity: 2.25 fps Avg Flow: 0.909 mgd Peak Flow: 1.508 mgd Min Flow: 0.275 mgdAvg Flow: 0.909 mgd Peak Flow: 1.508 mgd Min Flow: 0.275 mgdAvg Flow: 0.909 mgd Peak Flow: 1.508 mgd Min Flow: 0.275 mgdAvg Flow: 0.909 mgd Peak Flow: 1.508 mgd Min Flow: 0.275 mgd V&A Project No. 15-0346 FM11 - 7Appendix A City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Monitoring Site:Monitoring Site:Monitoring Site:Monitoring Site: Location:Location: Location:Location: FM12 MH 47-2282: 3033 Virginia Avenue Temporary Monitoring: April 13 to April 24, 2016 Sanitary Sewer Flow Monitoring City of Santa MonicaCity of Santa MonicaCity of Santa MonicaCity of Santa Monica Vicinity Map: FM12Vicinity Map: FM12Vicinity Map: FM12Vicinity Map: FM12 Data Summary ReportData Summary ReportData Summary ReportData Summary Report FM12 - 1V&A Project No. 15-0346 Appendix A FM12FM12 FM12FM12 Site InformationSite InformationSite InformationSite Information City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Pipe Diameter:Pipe Diameter:Pipe Diameter:Pipe Diameter:13.5 inches ADWF:ADWF: ADWF:ADWF:0.005 mgd Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:0.030 mgd Flow SketchFlow SketchFlow SketchFlow Sketch Satellite MapSatellite MapSatellite MapSatellite Map Street ViewStreet ViewStreet ViewStreet View Sewer MapSewer Map Sewer MapSewer Map Location:Location: Location:Location:MH 47-2282: 3033 Virginia Avenue Coordinates:Coordinates:Coordinates:Coordinates:118.4587° W, 34.0276° N Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):151 feet Plan ViewPlan View Plan ViewPlan View V&A Project No. 15-0346 FM12 - 2Appendix A FM12FM12 FM12FM12 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Effluent PipeEffluent PipeEffluent PipeEffluent Pipe Influent PipeInfluent PipeInfluent PipeInfluent Pipe V&A Project No. 15-0346 FM12 - 3Appendix A FM12FM12 FM12FM12 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Lateral PipeLateral PipeLateral PipeLateral Pipe V&A Project No. 15-0346 FM12 - 4Appendix A FM 1 2 FM 1 2 F M 1 2 FM 1 2 Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 1 0.0 1 0.0 1 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/24 F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0Rainfall (in/day) Re a l t i m e H o l i d a y Ra i n f a l l ADWF 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 1 0.0 1 0.0 1 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k e n d 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 1 0.0 1 0.0 1 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k d a y To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s T ot a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s Av g P e r i o d F l o w : 0 . 0 0 5 M G a l P e a k D a i l y F l o w : 0 . 0 06 M G a l M i n D a i l y F l o w : 0 . 0 0 5 M G a l Av g P e r i o d F l o w : 0 . 0 0 5 M G a l P e a k D a i l y F l o w : 0 . 0 0 6 M G a l M i n D a i l y F l o w : 0 . 0 0 5 M G a l Av g P e r i o d F l o w : 0 . 0 0 5 M G a l P e a k D a i l y F l o w : 0 . 0 0 6 M G a l M i n D a i l y F l o w : 0 . 0 0 5 M G a l Av g P e r i o d F l o w : 0 . 0 0 5 M G a l P e a k D a i l y F l o w : 0 . 0 0 6 M G a l M i n D a i l y F l o w : 0 . 0 0 5 M G a l V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM12 - 5 Ap p e n d i x A FM 1 2 FM 1 2 F M 1 2 FM 1 2 Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0. 0 0 0 0. 0 0 2 0. 0 0 4 0. 0 0 6 0. 0 0 8 0. 0 1 0 0. 0 1 2 0. 0 1 4 0. 0 1 6 0 : 0 0 1 : 0 0 2 : 0 0 3 : 0 0 4 : 0 0 5 : 0 0 6 : 0 0 7 : 0 0 8 : 0 0 9 : 0 0 1 0 : 0 0 1 1 : 0 0 1 2 : 0 0 1 3 : 0 0 1 4 : 0 0 1 5 : 0 0 1 6 : 0 0 1 7 : 0 0 1 8 : 0 0 1 9 : 0 0 2 0 : 0 0 2 1 : 0 0 2 2 : 0 0 2 3 : 0 0 F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Fr i d a y Fr i d a y F r i d a y Fr i d a y Sa t u r d a y Sa t u r d a y S a t u r d a y Sa t u r d a y Su n d a y Su n d a y S u n d a y Su n d a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y 0.005 mgdADWF:ADWF: ADWF:ADWF: V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM12 - 6 Ap p e n d i x A FM 1 2 FM 1 2 F M 1 2 FM 1 2 Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t Pe a k M e a s u r e d L e v e l : P ea k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : 3. 2 7 Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : 0. 2 4 Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : 13 . 5 in c h e s i nc h e s Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Di a m e t e r 75 % d / D 50 % d / D 0246810121416 0 4 / 1 3 0 4 / 1 5 0 4 / 1 7 0 4 / 1 9 0 4 / 2 1 04/23 L e v e l ( i n ) V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM12 - 7 Ap p e n d i x A FM12FM12 FM12FM12 Weekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow Hydrographs 4/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/2016 City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report 0 1 2 3 4 5 6 7 8 9 10 Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) LevLev LevLev 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) VelVel VelVel 0.000 0.005 0.010 0.015 0.020 0.025 0.030 0.035 4/13 4/14 4/15 4/16 4/17 4/18 4/19 4/20 4/21 4/22 4/23 4/24 Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Rain Flow ADWF Avg Level: 1.42 in. Peak Level: 3.27 in. Min Level: 0.67 in.Avg Level: 1.42 in. Peak Level: 3.27 in. Min Level: 0.67 in.Avg Level: 1.42 in. Peak Level: 3.27 in. Min Level: 0.67 in.Avg Level: 1.42 in. Peak Level: 3.27 in. Min Level: 0.67 in. Avg Velocity: 0.22 fps Peak Velocity: 0.68 fps Min Velocity: 0.06 fpsAvg Velocity: 0.22 fps Peak Velocity: 0.68 fps Min Velocity: 0.06 fpsAvg Velocity: 0.22 fps Peak Velocity: 0.68 fps Min Velocity: 0.06 fpsAvg Velocity: 0.22 fps Peak Velocity: 0.68 fps Min Velocity: 0.06 fps Avg Flow: 0.005 mgd Peak Flow: 0.030 mgd Min Flow: 0.001 mgdAvg Flow: 0.005 mgd Peak Flow: 0.030 mgd Min Flow: 0.001 mgdAvg Flow: 0.005 mgd Peak Flow: 0.030 mgd Min Flow: 0.001 mgdAvg Flow: 0.005 mgd Peak Flow: 0.030 mgd Min Flow: 0.001 mgd V&A Project No. 15-0346 FM12 - 8Appendix A City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Monitoring Site:Monitoring Site:Monitoring Site:Monitoring Site: Location:Location: Location:Location: FM13 MH 7-115A: Marine Street north of Main Street Temporary Monitoring: April 13 to April 24, 2016 Sanitary Sewer Flow Monitoring City of Santa MonicaCity of Santa MonicaCity of Santa MonicaCity of Santa Monica Vicinity Map: FM13Vicinity Map: FM13Vicinity Map: FM13Vicinity Map: FM13 Data Summary ReportData Summary ReportData Summary ReportData Summary Report FM13 - 1V&A Project No. 15-0346 Appendix A FM13FM13 FM13FM13 Site InformationSite InformationSite InformationSite Information City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Pipe Diameter:Pipe Diameter:Pipe Diameter:Pipe Diameter:35 inches ADWF:ADWF: ADWF:ADWF:1.228 mgd Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:1.998 mgd Flow SketchFlow SketchFlow SketchFlow Sketch Satellite MapSatellite MapSatellite MapSatellite Map Street ViewStreet ViewStreet ViewStreet View Sewer MapSewer Map Sewer MapSewer Map Location:Location: Location:Location:MH 7-115A: Marine Street north of Main Street Coordinates:Coordinates:Coordinates:Coordinates:118.4793° W, 33.9983° N Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):20 feet Plan ViewPlan View Plan ViewPlan View V&A Project No. 15-0346 FM13 - 2Appendix A FM13FM13 FM13FM13 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Effluent PipeEffluent PipeEffluent PipeEffluent Pipe Influent PipeInfluent PipeInfluent PipeInfluent Pipe V&A Project No. 15-0346 FM13 - 3Appendix A FM 1 3 FM 1 3 F M 1 3 FM 1 3 Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0.0 0 0.2 0 0.4 0 0.6 0 0.8 0 1.0 0 1.2 0 1.4 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/24 F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0Rainfall (in/day) Re a l t i m e H o l i d a y Ra i n f a l l ADWF 0.0 0 0.2 0 0.4 0 0.6 0 0.8 0 1.0 0 1.2 0 1.4 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k e n d 0.0 0 0.2 0 0.4 0 0.6 0 0.8 0 1.0 0 1.2 0 1.4 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k d a y To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s T ot a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s Av g P e r i o d F l o w : 1 . 2 2 3 M G a l P e a k D a i l y F l o w : 1 . 2 82 M G a l M i n D a i l y F l o w : 1 . 1 4 0 M G a l Av g P e r i o d F l o w : 1 . 2 2 3 M G a l P e a k D a i l y F l o w : 1 . 2 8 2 M G a l M i n D a i l y F l o w : 1 . 1 4 0 M G a l Av g P e r i o d F l o w : 1 . 2 2 3 M G a l P e a k D a i l y F l o w : 1 . 2 8 2 M G a l M i n D a i l y F l o w : 1 . 1 4 0 M G a l Av g P e r i o d F l o w : 1 . 2 2 3 M G a l P e a k D a i l y F l o w : 1 . 2 8 2 M G a l M i n D a i l y F l o w : 1 . 1 4 0 M G a l V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM13 - 4 Ap p e n d i x A FM 1 3 FM 1 3 F M 1 3 FM 1 3 Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0. 0 0 0 0. 2 0 0 0. 4 0 0 0. 6 0 0 0. 8 0 0 1. 0 0 0 1. 2 0 0 1. 4 0 0 1. 6 0 0 1. 8 0 0 2. 0 0 0 0 : 0 0 1 : 0 0 2 : 0 0 3 : 0 0 4 : 0 0 5 : 0 0 6 : 0 0 7 : 0 0 8 : 0 0 9 : 0 0 1 0 : 0 0 1 1 : 0 0 1 2 : 0 0 1 3 : 0 0 1 4 : 0 0 1 5 : 0 0 1 6 : 0 0 1 7 : 0 0 1 8 : 0 0 1 9 : 0 0 2 0 : 0 0 2 1 : 0 0 2 2 : 0 0 2 3 : 0 0 F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Fr i d a y Fr i d a y F r i d a y Fr i d a y Sa t u r d a y Sa t u r d a y S a t u r d a y Sa t u r d a y Su n d a y Su n d a y S u n d a y Su n d a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y 1.228 mgdADWF:ADWF: ADWF:ADWF: V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM13 - 5 Ap p e n d i x A FM 1 3 FM 1 3 F M 1 3 FM 1 3 Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t Pe a k M e a s u r e d L e v e l : P ea k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : 5. 6 7 Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : 0. 1 6 Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : 35 in c h e s i nc h e s Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Di a m e t e r 75 % d / D 50 % d / D 0510152025303540 0 4 / 1 3 0 4 / 1 5 0 4 / 1 7 0 4 / 1 9 0 4 / 2 1 04/23 L e v e l ( i n ) V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM13 - 6 Ap p e n d i x A FM13FM13 FM13FM13 Weekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow Hydrographs 4/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/2016 City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report 0 1 2 3 4 5 6 7 8 9 10 Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) LevLev LevLev 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) VelVel VelVel 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4/13 4/14 4/15 4/16 4/17 4/18 4/19 4/20 4/21 4/22 4/23 4/24 Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Rain Flow ADWF Avg Level: 4.45 in. Peak Level: 5.67 in. Min Level: 2.57 in.Avg Level: 4.45 in. Peak Level: 5.67 in. Min Level: 2.57 in.Avg Level: 4.45 in. Peak Level: 5.67 in. Min Level: 2.57 in.Avg Level: 4.45 in. Peak Level: 5.67 in. Min Level: 2.57 in. Avg Velocity: 3.63 fps Peak Velocity: 4.55 fps Min Velocity: 2.07 fpsAvg Velocity: 3.63 fps Peak Velocity: 4.55 fps Min Velocity: 2.07 fpsAvg Velocity: 3.63 fps Peak Velocity: 4.55 fps Min Velocity: 2.07 fpsAvg Velocity: 3.63 fps Peak Velocity: 4.55 fps Min Velocity: 2.07 fps Avg Flow: 1.223 mgd Peak Flow: 1.998 mgd Min Flow: 0.301 mgdAvg Flow: 1.223 mgd Peak Flow: 1.998 mgd Min Flow: 0.301 mgdAvg Flow: 1.223 mgd Peak Flow: 1.998 mgd Min Flow: 0.301 mgdAvg Flow: 1.223 mgd Peak Flow: 1.998 mgd Min Flow: 0.301 mgd V&A Project No. 15-0346 FM13 - 7Appendix A City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Monitoring Site:Monitoring Site:Monitoring Site:Monitoring Site: Location:Location: Location:Location: FM14 MH 7-149A: Main Street between Pier Avenue and Marine Street Temporary Monitoring: April 13 to April 24, 2016 Sanitary Sewer Flow Monitoring City of Santa MonicaCity of Santa MonicaCity of Santa MonicaCity of Santa Monica Vicinity Map: FM14Vicinity Map: FM14Vicinity Map: FM14Vicinity Map: FM14 Data Summary ReportData Summary ReportData Summary ReportData Summary Report FM14 - 1V&A Project No. 15-0346 Appendix A FM14FM14 FM14FM14 Site InformationSite InformationSite InformationSite Information City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Pipe Diameter:Pipe Diameter:Pipe Diameter:Pipe Diameter:54 inches ADWF:ADWF: ADWF:ADWF:1.191 mgd Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:2.367 mgd Flow SketchFlow SketchFlow SketchFlow Sketch Satellite MapSatellite MapSatellite MapSatellite Map Street ViewStreet ViewStreet ViewStreet View Sewer MapSewer Map Sewer MapSewer Map Location:Location: Location:Location:MH 7-149A: Main Street between Pier Avenue and Marine Street Coordinates:Coordinates:Coordinates:Coordinates:118.4800° W, 33.9984° N Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):20 feet Plan ViewPlan View Plan ViewPlan View V&A Project No. 15-0346 FM14 - 2Appendix A FM14FM14 FM14FM14 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Effluent PipeEffluent PipeEffluent PipeEffluent Pipe Influent PipeInfluent PipeInfluent PipeInfluent Pipe V&A Project No. 15-0346 FM14 - 3Appendix A FM 1 4 FM 1 4 F M 1 4 FM 1 4 Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0.0 0 0.2 0 0.4 0 0.6 0 0.8 0 1.0 0 1.2 0 1.4 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/24 F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0Rainfall (in/day) Re a l t i m e H o l i d a y Ra i n f a l l ADWF 0.0 0 0.2 0 0.4 0 0.6 0 0.8 0 1.0 0 1.2 0 1.4 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k e n d 0.0 0 0.2 0 0.4 0 0.6 0 0.8 0 1.0 0 1.2 0 1.4 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k d a y To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s T ot a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s Av g P e r i o d F l o w : 1 . 1 9 1 M G a l P e a k D a i l y F l o w : 1 . 2 46 M G a l M i n D a i l y F l o w : 1 . 1 0 6 M G a l Av g P e r i o d F l o w : 1 . 1 9 1 M G a l P e a k D a i l y F l o w : 1 . 2 4 6 M G a l M i n D a i l y F l o w : 1 . 1 0 6 M G a l Av g P e r i o d F l o w : 1 . 1 9 1 M G a l P e a k D a i l y F l o w : 1 . 2 4 6 M G a l M i n D a i l y F l o w : 1 . 1 0 6 M G a l Av g P e r i o d F l o w : 1 . 1 9 1 M G a l P e a k D a i l y F l o w : 1 . 2 4 6 M G a l M i n D a i l y F l o w : 1 . 1 0 6 M G a l V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM14 - 4 Ap p e n d i x A FM 1 4 FM 1 4 F M 1 4 FM 1 4 Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0. 0 0 0 0. 5 0 0 1. 0 0 0 1. 5 0 0 2. 0 0 0 2. 5 0 0 0 : 0 0 1 : 0 0 2 : 0 0 3 : 0 0 4 : 0 0 5 : 0 0 6 : 0 0 7 : 0 0 8 : 0 0 9 : 0 0 1 0 : 0 0 1 1 : 0 0 1 2 : 0 0 1 3 : 0 0 1 4 : 0 0 1 5 : 0 0 1 6 : 0 0 1 7 : 0 0 1 8 : 0 0 1 9 : 0 0 2 0 : 0 0 2 1 : 0 0 2 2 : 0 0 2 3 : 0 0 F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Fr i d a y Fr i d a y F r i d a y Fr i d a y Sa t u r d a y Sa t u r d a y S a t u r d a y Sa t u r d a y Su n d a y Su n d a y S u n d a y Su n d a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y 1.191 mgdADWF:ADWF: ADWF:ADWF: V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM14 - 5 Ap p e n d i x A FM 1 4 FM 1 4 F M 1 4 FM 1 4 Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t Pe a k M e a s u r e d L e v e l : P ea k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : 21 . 9 Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : 0. 4 0 Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : 54 in c h e s i nc h e s Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Di a m e t e r 75 % d / D 50 % d / D 0102030405060 0 4 / 1 3 0 4 / 1 5 0 4 / 1 7 0 4 / 1 9 0 4 / 2 1 04/23 L e v e l ( i n ) V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM14 - 6 Ap p e n d i x A FM14FM14 FM14FM14 Weekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow Hydrographs 4/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/2016 City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report 0 5 10 15 20 25 30 35 Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) LevLev LevLev 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) VelVel VelVel 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4/13 4/14 4/15 4/16 4/17 4/18 4/19 4/20 4/21 4/22 4/23 4/24 Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Rain Flow ADWF Avg Level: 13.05 in. Peak Level: 21.86 in. Min Level: 4.00 in.Avg Level: 13.05 in. Peak Level: 21.86 in. Min Level: 4.00 in.Avg Level: 13.05 in. Peak Level: 21.86 in. Min Level: 4.00 in.Avg Level: 13.05 in. Peak Level: 21.86 in. Min Level: 4.00 in. Avg Velocity: 0.65 fps Peak Velocity: 3.55 fps Min Velocity: 0.26 fpsAvg Velocity: 0.65 fps Peak Velocity: 3.55 fps Min Velocity: 0.26 fpsAvg Velocity: 0.65 fps Peak Velocity: 3.55 fps Min Velocity: 0.26 fpsAvg Velocity: 0.65 fps Peak Velocity: 3.55 fps Min Velocity: 0.26 fps Avg Flow: 1.191 mgd Peak Flow: 2.367 mgd Min Flow: 0.096 mgdAvg Flow: 1.191 mgd Peak Flow: 2.367 mgd Min Flow: 0.096 mgdAvg Flow: 1.191 mgd Peak Flow: 2.367 mgd Min Flow: 0.096 mgdAvg Flow: 1.191 mgd Peak Flow: 2.367 mgd Min Flow: 0.096 mgd V&A Project No. 15-0346 FM14 - 7Appendix A City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Monitoring Site:Monitoring Site:Monitoring Site:Monitoring Site: Location:Location: Location:Location: FM16 MH 7-165A: Main Street between Pier Avenue and Marine Street Temporary Monitoring: April 13 to April 24, 2016 Sanitary Sewer Flow Monitoring City of Santa MonicaCity of Santa MonicaCity of Santa MonicaCity of Santa Monica Vicinity Map: FM16Vicinity Map: FM16Vicinity Map: FM16Vicinity Map: FM16 Data Summary ReportData Summary ReportData Summary ReportData Summary Report FM16 - 1V&A Project No. 15-0346 Appendix A FM16FM16 FM16FM16 Site InformationSite InformationSite InformationSite Information City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Pipe Diameter:Pipe Diameter:Pipe Diameter:Pipe Diameter:54 inches ADWF:ADWF: ADWF:ADWF:8.960 mgd Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:Peak Measured Flow:15.758 mgd Flow SketchFlow SketchFlow SketchFlow Sketch Satellite MapSatellite MapSatellite MapSatellite Map Street ViewStreet ViewStreet ViewStreet View Sewer MapSewer Map Sewer MapSewer Map Location:Location: Location:Location:MH 7-165A: Main Street between Pier Avenue and Marine Street Coordinates:Coordinates:Coordinates:Coordinates:118.4799° W, 33.9983° N Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):Rim Elevation (Earth):20 feet Plan ViewPlan View Plan ViewPlan View V&A Project No. 15-0346 FM16 - 2Appendix A FM16FM16 FM16FM16 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Effluent PipeEffluent PipeEffluent PipeEffluent Pipe Influent PipeInfluent PipeInfluent PipeInfluent Pipe V&A Project No. 15-0346 FM16 - 3Appendix A FM16FM16 FM16FM16 Additional Site PhotosAdditional Site PhotosAdditional Site PhotosAdditional Site Photos City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report Lateral PipeLateral PipeLateral PipeLateral Pipe V&A Project No. 15-0346 FM16 - 4Appendix A FM 1 6 FM 1 6 F M 1 6 FM 1 6 Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s Pe r i o d F l o w S u m m a r y : D a i l y F l o w T o t a l s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0. 0 0 1. 0 0 2. 0 0 3. 0 0 4. 0 0 5. 0 0 6. 0 0 7. 0 0 8. 0 0 9. 0 0 10 . 0 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/24 F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) F l o w ( M G a l ) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0Rainfall (in/day) Re a l t i m e H o l i d a y Ra i n f a l l ADWF 0. 0 0 1. 0 0 2. 0 0 3. 0 0 4. 0 0 5. 0 0 6. 0 0 7. 0 0 8. 0 0 9. 0 0 10 . 0 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k e n d 0. 0 0 1. 0 0 2. 0 0 3. 0 0 4. 0 0 5. 0 0 6. 0 0 7. 0 0 8. 0 0 9. 0 0 10 . 0 0 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 3 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 4 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 5 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 6 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 7 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 8 4 / 1 9 4 / 1 9 4 / 1 9 4 / 1 9 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 0 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 1 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 2 4 / 2 3 4 / 2 3 4 / 2 3 4 / 2 3 4/24 4/24 4/24 4/240.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Re a l t i m e W e e k d a y To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s T ot a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s To t a l M o n t h l y R a i n f a l l : 0 . 0 0 i n c h e s Av g P e r i o d F l o w : 8 . 9 4 8 M G a l P e a k D a i l y F l o w : 9 . 2 41 M G a l M i n D a i l y F l o w : 8 . 6 4 7 M G a l Av g P e r i o d F l o w : 8 . 9 4 8 M G a l P e a k D a i l y F l o w : 9 . 2 4 1 M G a l M i n D a i l y F l o w : 8 . 6 4 7 M G a l Av g P e r i o d F l o w : 8 . 9 4 8 M G a l P e a k D a i l y F l o w : 9 . 2 4 1 M G a l M i n D a i l y F l o w : 8 . 6 4 7 M G a l Av g P e r i o d F l o w : 8 . 9 4 8 M G a l P e a k D a i l y F l o w : 9 . 2 4 1 M G a l M i n D a i l y F l o w : 8 . 6 4 7 M G a l V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM16 - 5 Ap p e n d i x A FM 1 6 FM 1 6 F M 1 6 FM 1 6 Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s Av e r a g e D r y W e a t h e r F l o w H y d r o g r a p h s City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t 0. 0 0 0 2. 0 0 0 4. 0 0 0 6. 0 0 0 8. 0 0 0 10 . 0 0 0 12 . 0 0 0 14 . 0 0 0 0 : 0 0 1 : 0 0 2 : 0 0 3 : 0 0 4 : 0 0 5 : 0 0 6 : 0 0 7 : 0 0 8 : 0 0 9 : 0 0 1 0 : 0 0 1 1 : 0 0 1 2 : 0 0 1 3 : 0 0 1 4 : 0 0 1 5 : 0 0 1 6 : 0 0 1 7 : 0 0 1 8 : 0 0 1 9 : 0 0 2 0 : 0 0 2 1 : 0 0 2 2 : 0 0 2 3 : 0 0 F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) F l o w ( m g d ) Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Mo n - T h u r s Fr i d a y Fr i d a y F r i d a y Fr i d a y Sa t u r d a y Sa t u r d a y S a t u r d a y Sa t u r d a y Su n d a y Su n d a y S u n d a y Su n d a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y Ti m e o f D a y 8.960 mgdADWF:ADWF: ADWF:ADWF: V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM16 - 6 Ap p e n d i x A FM 1 6 FM 1 6 F M 1 6 FM 1 6 Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y Si t e C a p a c i t y a n d S u r c h a r g e S u m m a r y City of Santa Monica Sa n i t a r y S e w e r F l o w M o n i t o r i n g a n d I / I R e p o r t Pe a k M e a s u r e d L e v e l : P ea k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : Pe a k M e a s u r e d L e v e l : 26 . 4 Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : Pe a k d / D R a t i o : 0. 4 9 Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : Pi p e D i a m e t e r : 54 in c h e s i nc h e s Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Re a l t i m e F l o w L e v e l s w i t h R a i n f a l l D a t a o v e r M o n i t o r i n g P e r i o d Di a m e t e r 75 % d / D 50 % d / D 0102030405060 0 4 / 1 3 0 4 / 1 5 0 4 / 1 7 0 4 / 1 9 0 4 / 2 1 04/23 L e v e l ( i n ) V& A P r o j e c t N o . 1 5 - 0 3 4 6 FM16 - 7 Ap p e n d i x A FM16FM16 FM16FM16 Weekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow HydrographsWeekly Level, Velocity and Flow Hydrographs 4/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/20164/13/2016 to 4/24/2016 City of Santa Monica Sanitary Sewer Flow Monitoring and I/I Report 0 5 10 15 20 25 30 35 40 Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) Le v e l ( i n ) LevLev LevLev 0.0 1.0 2.0 3.0 4.0 5.0 6.0 Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) Ve l o c i t y ( f p s ) VelVel VelVel 0 5 10 15 20 25 4/13 4/14 4/15 4/16 4/17 4/18 4/19 4/20 4/21 4/22 4/23 4/24 Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) Fl o w ( m g d ) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Ra i n ( i n / h r ) Rain Flow ADWF Avg Level: 18.01 in. Peak Level: 26.44 in. Min Level: 9.87 in.Avg Level: 18.01 in. Peak Level: 26.44 in. Min Level: 9.87 in.Avg Level: 18.01 in. Peak Level: 26.44 in. Min Level: 9.87 in.Avg Level: 18.01 in. Peak Level: 26.44 in. Min Level: 9.87 in. Avg Velocity: 2.95 fps Peak Velocity: 3.90 fps Min Velocity: 2.23 fpsAvg Velocity: 2.95 fps Peak Velocity: 3.90 fps Min Velocity: 2.23 fpsAvg Velocity: 2.95 fps Peak Velocity: 3.90 fps Min Velocity: 2.23 fpsAvg Velocity: 2.95 fps Peak Velocity: 3.90 fps Min Velocity: 2.23 fps Avg Flow: 8.948 mgd Peak Flow: 15.758 mgd Min Flow: 3.013 mgdAvg Flow: 8.948 mgd Peak Flow: 15.758 mgd Min Flow: 3.013 mgdAvg Flow: 8.948 mgd Peak Flow: 15.758 mgd Min Flow: 3.013 mgdAvg Flow: 8.948 mgd Peak Flow: 15.758 mgd Min Flow: 3.013 mgd V&A Project No. 15-0346 FM16 - 8Appendix A ÐÐSP !! ! ! ! ! ! ! !!!! ! ! ! ! ! ! ! !! ! ! ! ! ! ! !!!! !!! !! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! !! ! !!! ! ! ! ! ! ! !!!! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! !!!!!! !!! !!! ! ! !! ! !!! ! ! ! ! !! ! !! ! !!! !!! !!!! !!!!! !!! !!!! ! !!!! !!!!!!!!!! !!!!!!!!!! !!!!!!!!! !!!!!!!!! !!!! !!!!!!! ! !!!!! ! ! !! !!!!! !!!!!! !!!! ! ! !! !!!! !!! ! !! !! !!! !!!!! ! ! ! ! ! !!!! ! !!! ! ! !! ! ! !!! ! ! ! ! ! ! ! ! ! ! !! ! !!! !!! ! ! !! ! ! ! !! ! ! ! ! !! ! ! ! ! ! ! !! !!! ! !!! !! ! !! ! ! ! !! !!! ! ! ! ! ! ! !! ! !! !!! ! ! !! ! ! !! ! ! ! ! ! !!!! ! ! ! ! !! !! ! ! ! !! ! !!!! ! ! ! ! !! ! ! ! ! ! ! ! ! !! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! !! !!!! !!!! !!!!!! !! !!! !!!!!!! !!!!!!! !!!!!!!!! !!!!!!!!! !!!!!!!!! !!!!!!!!! !!!!!!! !!!!!!! !!!!!!! !!!! !!!!! ! !!!!!!!! ! !! ! !! !!!! !! !! ! !!!!! !!!!!!!!! ! !!! !!! !!! ! ! ! ! ! !!! !! ! ! ! !! ! ! ! ! ! ! !!! ! ! !!! !! ! !! !! ! !!! ! !! ! ! ! ! !! ! !! ! !! ! !!! ! ! !! !! !!! ! !!! !!!!!! !! !!!!! !! ! ! ! ! ! !!!!! ! ! ! ! !! !! !!! ! ! !!! !!! ! !! ! ! ! ! !! !!! ! !!!! ! ! ! !! !! ! !!!! !!!!! ! !!! !! !!!!!!!! ! !! !! !! ! !! !! ! ! !! ! ! ! ! ! !! ! ! ! !! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! !! ! ! ! ! ! !! !!!! !!!!! !! ! !!! !!!! ! ! !!!! !! !! !!!!!! !! !! ! !! !!!!! !!!! !!! !!!!!!!!! !!!!!!!!! !!!!!!!! !!!!!!!! !! ! !!!!!! ! !!!!!!! !!!!!!! !!!!!!! !!! !!!!! !!!!!!! ! !!!! !!!! !!!! !!! !!!! !! !! ! ! ! !!! !! ! !!! ! !!! !!!! ! !! !!! !! ! ! ! ! ! ! !! !!! !!! !! ! !!! ! !! ! !! ! ! ! !! ! ! ! !! ! ! ! !! ! ! ! ! ! !! ! ! ! ! ! ! !!! !! ! ! ! ! ! !!! ! !! !!! ! ! ! !!! ! ! !! ! ! !! ! ! ! ! ! !! ! ! !! ! ! ! ! ! ! ! !! ! ! ! !! ! ! !!! ! !!! ! ! ! !! ! !! ! ! !!!!!! !!!! ! ! ! !! ! ! !!!!! !!!!! ! !!!!! ! !!! !!! !! ! !!!! !!! !!! !!! !!!!!!! !!!! !!!!!! ! !!! !!!! !! !!!!! !!!!!!!!! !!!! ! !! !! !!!!! ! ! !!!!!!! !!!!!!! !!!!!! !!!!!! !!! !! !!!! ! !!! !! !!! ! ! ! !!! !! !!!!!!!!!!! !! ! !!! ! !!! !!!!!!! !!! !!!! ! ! ! ! ! !!! ! ! ! ! ! ! ! ! ! ! !!!! !! ! ! ! ! ! ! !! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! !! ! !!! ! ! ! ! !!!! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! !! ! ! !!!!!!! ! ! ! ! ! ! ! !! ! ! ! ! ! ! ! ! !!! ! !! ! !! !! ! ! ! ! ! ! !! ! ! !! ! ! !!!!!! !! ! ! ! !!! !! ! !! ! !!!!! !!! ! ! ! ! ! ! !! ! !! ! ! ! ! !! !! ! !! ! !!! !!! !! ! ! ! ! !!! !!! !! !! ! !! ! ! ! ! !!! !! ! ! !! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! 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ÐÐSP Pumping Station Manholes !Modeled Manholes !Non-modeled Manholes Development Projects #*APPROVED #*PENDING #*UNDER CONSTRUCTION #*WITHDRAWN Flow Monitroing Locations !(Proposed Flow Meter Locations !Permanent Flow Meters !Spring Summer 2011 !Novemeber 2015 !October 2010 Modeled Sewer Mains by Diameter 4" - 6" 8" 10" - 12" 14" - 18" 20" - 27" 30" - 42" 48" - 72" N/A Non-modeled Sewer Mains 2015 Approved Land Use Low Density Residential Medium Density Residential High Density Residential Commercial Industrial Institutional Downtown Mixed Use Office Parks and Open Space Transit Oceanfront Downtown Community Sewer Basin B-1 B-2 B-3 B-4 B-5 B-6 B-7 B-8 B-9 B-10 ª 0 10.5 Miles Proposed Flow Monitoring Locations & 2015 Approved Land Use Appendix C: Model Migration Comparison Graphs Appendix C Model Migration Comparison Graphs 0 5 10 15 20 25 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Fl o w ( m g d ) Time (hours) 7-114 InfoWorks CS Flow (MGD)InfoSewer Flow (mgd) 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Fl o w ( m g d ) Time (hours) 7-115A InfoWorks CS Flow (MGD)InfoSewer Flow (mgd) 0 1 2 3 4 5 6 7 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Fl o w ( m g d ) Time (hours) 7-149A InfoWorks CS Flow (MGD)InfoSewer Flow (mgd) 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Fl o w ( m g d ) Time (hours) 7-149B InfoWorks CS Flow (MGD)InfoSewer Flow (mgd) 0 2 4 6 8 10 12 14 16 18 20 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Fl o w ( m g d ) Time (hours) 7-165A InfoWorks CS Flow (MGD)InfoSewer Flow (mgd) 0 1 2 3 4 5 6 7 8 9 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Fl o w ( m g d ) Time (hours) 11-363A InfoWorks CS Flow (MGD)InfoSewer Flow (mgd) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Fl o w ( m g d ) Time (hours) 11-328 InfoWorks CS Flow (MGD)InfoSewer Flow (mgd) 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Fl o w ( m g d ) Time (hours) 11-330 InfoWorks CS Flow (MGD)InfoSewer Flow (mgd) 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Fl o w ( m g d ) Time (hours) 10-254 InfoWorks CS Flow (MGD)InfoSewer Flow (mgd) 0 0.05 0.1 0.15 0.2 0.25 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Fl o w ( m g d ) Time (hours) 31-1481 InfoWorks CS Flow (MGD)InfoSewer Flow (mgd) 0 0.2 0.4 0.6 0.8 1 1.2 1.4 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Fl o w ( m g d ) Time (hours) 31-1529 InfoWorks CS Flow (MGD)InfoSewer Flow (mgd) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Fl o w ( m g d ) Time (hours) 40-1974 InfoWorks CS Flow (MGD)InfoSewer Flow (mgd) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Fl o w ( m g d ) Time (hours) 46-2249 InfoWorks CS Flow (MGD)InfoSewer Flow (mgd) 0 0.2 0.4 0.6 0.8 1 1.2 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Fl o w ( m g d ) Time (hours) 17-711 InfoWorks CS Flow (MGD)InfoSewer Flow (mgd) Appendix D: Model Calibration Graphs Appendix D Model Calibration Results Appendix E: Coast Survey Data Appendix E Coast Survey Locations/Data PT  # N o r t h E a s t L i d  El e v . M H  # P i p e  1 Pi p e  2 Pi p e  3 1 1 8 2 9 5 2 7 . 9 0 6 4 0 9 4 5 1 . 3 7 1 0 5 . 4 9 1 0 ‐21 5 9 8 . 5 9  IN V  IN  18 "  NE 9 8 . 8 6  IN V  IN  18 "  NW 9 8 . 7 3  INV  OUT  18" SW 2 1 8 2 9 3 5 9 . 8 9 6 4 0 9 8 7 2 . 8 4 1 0 0 . 2 8 1 0 ‐23 4 9 0 . 2 8  IN V  IN  12 "  NW 9 0 . 1 4  IN V  OU T  12 "  SE 3 1 8 2 9 6 5 7 . 6 7 6 4 0 9 5 8 6 . 0 2 1 0 7 . 6 3 1 0 ‐23 6 9 7 . 1 3  IN V  IN  10 "  NE 9 7 . 1 2  IN V  OU T  10 "  SE 9 7 . 1 8  INV  OUT  10" SW 4 1 8 2 9 0 7 5 . 5 5 6 4 1 0 9 9 6 . 7 5 8 9 . 1 8 1 0 ‐24 8 7 9 . 5 5  IN V  IN  8"  NW 8 0 . 2 0  IN V  IN  8"  SW 79 . 3 1  INV  OUT  10" SW 5 1 8 3 0 0 8 1 . 0 8 6 4 1 0 0 2 4 . 4 3 1 1 0 . 7 6 1 0 ‐25 3 1 0 3 . 1 4  IN V  IN  12 "  NW 1 0 2 . 9 6  IN V  OU T  10 "  SW 6 1 8 2 9 6 3 1 . 5 2 6 4 1 1 5 7 3 . 4 6 1 0 0 . 1 7 1 0 ‐26 7 9 0 . 2 1  IN V  IN  8"  NW 9 0 . 4 8  IN V  IN  8"  NE 9 0 . 1 6  INV  OUT  8" SE 7 1 8 2 7 5 0 4 . 5 6 6 4 1 3 2 7 5 . 3 3 7 4 . 1 8 1 1 ‐29 6 6 6 . 0 4  IN  21 "  NE 66 . 0 6  IN V  OU T  15 "  NW 6 6 . 0 4  INV  OUT  15" NW 8 1 8 2 6 9 9 9 . 6 7 6 4 1 3 3 1 1 . 6 9 6 7 . 1 9 1 1 ‐30 3 A 6 0 . 2 6  IN V  IN  6"  NE 59 . 6 3  IN V  OU T  15 "  SE 9 18 2 7 6 7 1 . 1 6 6 4 1 1 4 9 9 . 3 0 6 6 . 0 6 1 1 ‐32 8 5 5 . 8 7  IN V  IN  18 "  NW 5 5 . 9 6  IN V  IN  8"  NE 5 5 . 6 6  INV  OUT  18" SE 10 1 8 2 7 7 0 6 . 7 9 6 4 1 1 5 0 5 . 4 5 6 6 . 4 8 1 1 ‐32 9 5 3 . 1 6  IN V  IN  27 "  NE 5 2 . 9 2  IN V  OU T  27 "  SW 11 1 8 2 7 6 4 2 . 2 6 6 4 1 1 5 3 9 . 3 7 6 5 . 6 4 1 1 ‐33 0 5 2 . 5 0  IN V  IN  27 "  NW 5 3 . 2 7  IN V  IN  12 "  SW 5 2 . 1 9  INV  OUT  27" SE 12 1 8 2 7 4 8 5 . 5 7 6 4 1 1 6 7 9 . 3 9 6 3 . 8 8 1 1 ‐33 1 5 3 . 7 1  IN V  IN  18 "  NW 5 3 . 5 3  IN V  OU T  18 "  SE 13 1 8 2 7 1 9 8 . 3 7 6 4 1 1 9 5 7 . 0 1 5 8 . 7 8 1 1 ‐33 6 N O  EL E V  IN  24 "  NE 48 . 2 1  IN V  IN  18 "  NW 3 7 . 3 2  INV  IN  18" NW 14 1 8 2 7 0 8 0 . 0 1 6 4 1 1 8 1 0 . 9 3 5 7 . 4 3 1 1 ‐34 8 4 7 . 2 1  IN V  IN  27 "  NW 4 7 . 0 8  IN V  OU T  27 "  SE 15 L I D  BO L T E D  SH U T 16 L I D  BO L T E D  SH U T 17 1 8 2 7 4 0 5 . 9 5 6 4 1 1 4 9 6 . 2 9 6 3 . 3 8 1 1 ‐35 1 5 3 . 2 5  IN V  IN  6"  NW 5 0 . 3 1  IN V  IN  27 "  NE 5 0 . 1 1  INV  OUT  27" SE 18 1 8 2 7 0 4 0 . 4 5 6 4 1 1 8 5 0 . 9 0 5 6 . 9 7 1 1 ‐35 3 3 2 . 5 4  IN V  27 "  NW  ‐   SE 19 1 8 2 6 7 1 5 . 1 6 6 4 1 2 1 5 5 . 6 9 6 0 . 1 4 1 1 ‐36 1 3 1 . 4 4  IN V  IN  8"  NE 31 . 1 0  IN V  OU T  8"  SE 20 18 2 5 6 5 0 . 0 3 6 4 1 3 2 8 1 . 6 2 5 1 . 1 6 1 2 ‐37 5 4 1 . 0 6  IN V  IN  18 "  NE 4 0 . 5 9  IN V  OU T  18 "  SW 21 1 8 2 6 2 1 0 . 1 9 6 4 1 3 9 4 3 . 4 2 6 1 . 3 5 1 2 ‐38 2 A 4 9 . 8 0  IN V  IN  18 "  NW 5 1 . 4 7  IN V  IN  12 "  NE 4 9 . 6 2  INV  OUT  18" SE 22 1 8 2 6 2 4 9 . 1 7 6 4 1 3 9 2 0 . 0 5 6 1 . 2 9 1 2 ‐38 2 B 5 0 . 6 5  IN V  IN  18 "  NW 5 0 . 4 3  IN V  OU T  18 "  SE 23 1 8 2 6 2 6 2 . 1 8 6 4 1 4 0 0 7 . 2 9 6 2 . 2 4 1 2 ‐38 4 5 2 . 6 7  IN V  IN  12 "  NE 5 2 . 7 8  IN V  IN  8"  N 5 4 . 1 5  INV  IN  8" SE 24 1 8 2 6 6 2 3 . 1 2 6 4 1 3 5 8 1 . 6 8 6 3 . 4 7 1 2 ‐38 5 A 5 5 . 8 7  IN V  IN  12 "  NE 55 . 0 5  IN V  IN  18 "  NW 5 4 . 9 5  INV  OUT  18" SW 25 I N  SC H O O L  YA R D  ‐   NO T  FO U N D 26 1 8 2 6 3 7 1 . 3 6 6 4 1 4 1 3 9 . 4 8 6 6 . 6 8 1 2 ‐43 9 5 5 . 9 8  IN V  IN  12 "  NE 5 6 . 2 0  IN V  IN  8"  SE 5 5 . 8 7  INV  OUT  12" SW 27 1 8 2 2 9 5 7 . 4 4 6 4 1 7 9 9 1 . 5 5 3 5 . 9 9 1 3 ‐47 1 2 6 . 2 8  IN V  IN  8"  NE 19 . 7 0  IN V  IN  8"  NE 1 9 . 3 3  INV  IN  18" NW 28 1 8 2 2 9 1 0 . 7 4 6 4 1 8 0 3 1 . 1 9 3 5 . 8 7 1 3 ‐47 3 1 9 . 5 1  IN V  IN    8"  SW 1 9 . 2 8  IN V  IN  18 "  NW 19 . 2 3  INV  OUT  15" NE 29 1 8 2 4 0 5 7 . 6 2 6 4 1 6 5 0 6 . 5 5 6 8 . 4 8 1 3 ‐50 9 6 2 . 8 2  IN V  IN  8"  SE 62 . 7 3  IN V  OU T  10 "  SW 30 1 8 2 4 3 8 3 . 6 9 6 4 1 6 0 2 5 . 2 7 6 6 . 6 9 1 3 ‐52 7 6 1 . 5 2  IN V  IN  8"  NE 61 . 5 2  IN V  OU T  12 "  NW 31 1 8 2 4 3 7 7 . 0 9 6 4 1 6 0 5 8 . 9 8 6 6 . 9 0 1 3 ‐52 8 6 1 . 7 4  IN V  IN  10 "  SE 6 1 . 7 4  IN V  OU T  10 "  SW 32 L I D  BO L T E D  SH U T Co a s t  Su r v e y  Ma s t e r  Da t a b a s e 33 1 8 2 3 5 5 3 . 2 1 6 4 1 5 0 2 1 . 2 9 2 1 . 4 9 1 3 ‐55 8 A 1 0 . 5 1  IN V  IN  10 "  NE 8 . 3 8  IN V  IN  30 "  NW 8 . 2 3  INV  OUT  30" SW 34 1 8 2 3 0 9 3 . 6 4 6 4 1 5 4 0 1 . 0 1 1 9 . 9 0 1 3 ‐56 2 8 . 3 4  IN V  IN  12 "  NE 7. 4 4  IN V  IN  30 "  NW 7 . 2 8  INV  OUT  30" SE 35 1 8 2 2 4 0 8 . 2 3 6 4 1 8 5 6 4 . 1 2 2 9 . 4 8 1 3 A ‐10 1 1 7 . 8 3  IN V  IN  8"  SW  CA P P E D 1 7 . 8 2  IN V  IN  15 "  NW 1 7 . 8 0  INV  OUT  15" SE 36 1 8 3 2 9 7 9 . 7 5 6 4 0 9 1 2 7 . 5 9 1 7 1 . 9 3 1 5 ‐60 3 1 6 7 . 1 6  IN V  IN  6"  NE 1 6 6 . 8 1  IN V  OU T  6"  SW 37 18 3 3 3 0 0 . 8 3 6 4 0 9 1 5 0 . 1 5 1 7 8 . 8 8 1 5 ‐60 7 1 7 4 . 3 6  IN V  IN  8"  NW 1 7 4 . 1 6  IN V  IN  8"  NE 1 7 4 . 0 2  INV  OUT  8" SW 38 1 8 3 3 5 7 8 . 4 3 6 4 0 9 4 3 7 . 7 1 1 8 3 . 5 1 1 5 ‐61 0 1 7 9 . 8 4  IN V  IN  6"  NW 1 7 9 . 8 2  IN V  IN  8"  NE 1 7 9 . 7 7  INV  OUT  8" SW 39 1 8 3 3 8 5 5 . 9 3 6 4 0 9 7 2 6 . 0 4 1 8 9 . 7 0 1 5 ‐62 5 1 8 5 . 6 9  IN V  IN  8"  NW 1 8 5 . 4 8  IN V  IN  8"  NE 1 8 5 . 3 2  INV  OUT  8" SW 40 1 8 3 2 2 3 9 . 5 1 6 4 1 1 2 8 3 . 7 2 1 5 4 . 0 1 1 6 ‐66 3 1 4 8 . 7 1  IN V  IN  8"  NW 1 4 8 . 7 0  IN V  OU T  8"  SE 41 1 8 3 0 7 4 2 . 5 0 6 4 1 2 7 2 6 . 4 4 1 2 2 . 1 4 1 6 ‐66 9 11 4 . 6 7  IN V  IN  10 "  NW 1 1 4 . 5 2  IN V  OU T  10 "  SE 42 1 8 2 8 6 6 7 . 3 2 6 4 1 4 7 1 9 . 1 8 9 2 . 5 2 1 7 ‐70 0 8 0 . 0 3  IN V  IN  21 "  NE 8 1 . 0 0  IN V  IN  8"  NW 7 9 . 9 9  INV  OUT  21" SW 43 1 8 2 7 2 0 2 . 0 6 6 4 1 5 2 9 2 . 6 7 8 6 . 4 7 1 8 ‐75 6 7 9 . 4 7  IN V  IN  10 "  NW 8 0 . 0 8  IN V  IN  8"  NE 7 9 . 4 4  INV  IN  8" SW 44 1 8 2 7 1 2 8 . 2 0 6 4 1 5 1 0 1 . 5 3 8 8 . 8 5 1 8 ‐76 2 8 3 . 6 4  +/ ‐  IN V  8"  NW  CA P P E D 8 1 . 6 4  IN V  IN  8"  NW 8 1 . 4 0  INV  OUT  8" SE 45 18 2 6 0 5 0 . 5 6 6 4 1 6 6 8 8 . 6 5 7 0 . 8 6 1 8 ‐80 3 6 1 . 2 4  IN V  IN  10 "  NW 6 1 . 3 1  IN V  IN  10 "  SE 6 1 . 1 1  INV  OUT  10" SW 46 1 8 2 5 9 6 5 . 6 8 6 4 1 6 5 6 2 . 7 0 7 0 . 5 2 1 8 ‐80 4 6 0 . 1 5  IN V  IN  18 "  NW 6 0 . 4 0  IN V  IN  10 "  NE 6 0 . 0 2  INV  OUT  18" SE 47 1 8 2 6 4 5 4 . 2 3 6 4 1 6 0 6 0 . 9 3 7 7 . 0 5 1 8 ‐80 5 6 7 . 8 9  IN V  IN  12 "  NW 6 7 . 8 6  IN V  IN  14 "  NE 6 7 . 8 0  INV  OUT  18" SE 48 1 8 2 7 1 5 9 . 6 8 6 4 1 5 5 4 9 . 1 0 8 5 . 3 4 1 8 ‐81 9 7 8 . 6 8  IN V  IN  8"  NW 7 8 . 6 4  IN V  IN  8"  NE 7 8 . 6 7  INV  OUT  8" SE 49 18 2 3 8 5 3 . 5 1 6 4 1 8 8 5 7 . 2 1 4 3 . 0 2 1 9 ‐83 4 2 0 . 7 5  IN V  IN  8"  NE 20 . 8 1  IN V  OU T  8"  SE 50 1 8 2 4 7 9 8 . 7 4 6 4 1 7 7 9 7 . 0 3 5 3 . 3 5 1 9 ‐89 3 4 1 . 4 2  IN V  IN  21 "  NW 4 1 . 7 5  IN V  IN  8"  SW 4 0 . 6 0  INV  OUT  21" SE 51 1 8 2 4 7 6 0 . 6 8 6 4 1 7 8 4 9 . 6 7 5 3 . 1 6 1 9 ‐89 4 3 8 . 8 2  IN V  IN  24 "  NW 3 8 . 3 8  IN V  IN  30 "  NE 3 7 . 7 1  INV  OUT  33" SE 52 1 8 2 5 5 0 6 . 9 3 6 4 1 8 3 0 9 . 6 8 8 6 . 0 7 1 9 ‐91 1 7 6 . 9 4  IN V  IN  15 "  NW 7 6 . 8 7  IN V  IN  15 "  NE 7 6 . 5 8  INV  OUT  30" SE 53 18 3 6 3 6 8 . 2 0 6 4 0 8 9 6 8 . 5 8 2 6 5 . 2 1 2 1 ‐99 9 2 5 8 . 9 9  BO T T O M 25 8 . 8 1  IN V  OU T  8"  SE 54 1 8 3 5 1 6 2 . 8 2 6 4 1 0 1 3 1 . 6 3 2 3 2 . 6 3 2 2 ‐10 2 5 2 2 5 . 7 1  IN V  IN  8"  NW 2 2 5 . 5 9  IN V  OU T  8"  SE 55 1 8 3 3 5 6 3 . 4 6 6 4 1 1 6 7 4 . 8 4 1 7 9 . 5 9 2 2 ‐10 3 4 1 7 3 . 6 4  IN V  IN  8"  NW 1 7 3 . 5 5  IN V  OU T  8"  SE 56 1 8 3 2 5 7 5 . 4 3 6 4 1 2 6 2 6 . 7 8 1 5 3 . 9 9 2 3 ‐10 7 1 1 4 7 . 1 4  IN V  IN  8"  NW 1 4 6 . 9 7  IN V  OU T  10 "  SE 57 1 8 3 0 0 2 1 . 0 2 6 4 1 6 2 0 3 . 2 5 1 0 8 . 7 3 2 4 ‐11 6 0 A 9 9 . 9 1  IN V  IN  10 "  NE 1 0 0 . 7 0  IN V  IN  8"  SE 9 9 . 7 5  INV  OUT  10" SW 58 18 3 5 4 3 9 . 8 1 6 4 1 2 6 4 3 . 1 8 2 4 3 . 5 4 2 9 ‐13 8 2 2 3 6 . 6 8  IN V  IN  8"  SW 2 3 6 . 8 8  IN V  OU T  8"  SE 59 1 8 3 5 2 9 3 . 5 4 6 4 1 4 4 5 0 . 6 5 2 2 9 . 8 0 3 0 ‐14 1 1 2 2 4 . 5 0  IN V  IN  10 "  NW 2 2 4 . 5 0  IN V  IN  10 "  NE 2 2 4 . 4 7  INV  OUT  10" SE 60 1 8 3 3 7 0 3 . 6 6 6 4 1 4 8 7 2 . 2 9 1 6 4 . 4 1 3 0 ‐14 2 7 1 5 6 . 0 1  IN V  IN  8"  NW 1 5 6 . 0 2  IN V  IN  6"  NE 1 5 5 . 9 8  INV  OUT  10" SE 61 1 8 3 2 7 1 9 . 1 3 6 4 1 5 2 6 6 . 5 1 1 4 6 . 0 4 3 0 ‐14 3 3 1 3 8 . 1 0  IN V  IN  10 "  NW 1 3 5 . 0 5  IN V  OU T  10 "  SE 62 1 8 3 3 4 6 0 . 0 3 6 4 1 4 5 5 1 . 8 4 1 6 1 . 9 7 3 0 ‐14 3 5 1 5 4 . 1 1  IN V  IN  8"  NE 15 4 . 0 3  IN V  IN  8"  NW 1 5 3 . 9 2  INV  OUT  8" SE 63 1 8 3 3 6 1 1 . 9 0 6 4 1 4 4 0 6 . 9 6 1 6 5 . 0 3 3 0 ‐14 3 8 1 5 7 . 7 1  IN V  IN  8"  NW 1 5 7 . 3 4  IN V  OU T  8"  NE 64 1 8 3 3 1 8 2 . 2 8 6 4 1 4 2 6 3 . 6 8 1 6 0 . 9 9 3 0 ‐14 4 9 1 5 2 . 7 5  IN V  IN  8"  NW 1 5 1 . 5 3  IN V  OU T  10 "  SE 65 1 8 3 2 6 9 5 . 2 2 6 4 1 6 6 7 9 . 7 5 1 4 2 . 1 9 3 1 ‐15 0 9 1 3 6 . 4 6  IN V  IN  15 "  NW 1 3 3 . 3 6  IN V  IN  15 "  NW 1 3 3 . 3 4  INV  IN  15" NW 66 1 8 3 2 7 3 4 . 7 6 6 4 1 6 7 5 4 . 5 0 1 4 3 . 0 0 3 1 ‐15 1 2 1 3 5 . 7 6  IN V  IN  12 "  NE 1 3 5 . 5 5  IN V  OU T  12 "  NW 67 1 8 3 1 4 0 8 . 5 8 6 4 1 7 6 4 1 . 9 4 1 3 3 . 1 4 3 1 ‐15 2 6 A 1 1 9 . 9 5  IN V  IN  8"  NW 1 2 0 . 0 8  IN V  IN  8"  SE 1 1 9 . 8 6  INV  OUT  8" SW 68 1 8 2 7 5 2 0 . 1 8 6 4 2 0 5 5 9 . 5 8 1 3 5 . 9 6 3 3 ‐16 2 6 1 2 0 . 2 9  IN V  BO T T O M 1 2 4 . 1 6  IN V  OU T  8"  NW 69 1 8 2 8 1 5 6 . 1 4 6 4 2 0 3 2 2 . 7 6 1 4 4 . 9 4 3 3 ‐16 4 1 1 2 7 . 5 8  IN V  IN  15 "  NW 1 2 7 . 6 2  IN V  OU T  15 "  SE 70 I N  BA C K  YA R D  OF  HO M E  ‐   NO T  FO U N D 71 1 8 3 8 9 6 4 . 1 0 6 4 1 3 4 9 9 . 1 6 3 2 9 . 4 3 3 7 ‐17 6 4 A 3 1 9 . 4 0  IN V  IN  8"  NW 3 1 9 . 3 2  IN V  OU T  8"  SE 72 1 8 3 7 4 2 6 . 8 6 6 4 1 2 7 0 1 . 0 4 2 9 3 . 3 2 3 7 ‐17 9 1 2 8 8 . 0 1  IN V  IN  8"  NW 28 8 . 0 0  IN V  OU T  8"  SE 73 1 8 3 5 8 4 8 . 9 7 6 4 1 5 0 2 6 . 3 7 2 3 4 . 3 2 3 8 ‐18 0 7 2 2 8 . 6 9  IN V  IN  6"  NW 2 2 8 . 6 7  IN V  OU T  8"  SW 74 1 8 3 4 6 1 5 . 4 9 6 4 1 7 2 3 4 . 7 6 1 5 7 . 1 3 3 8 ‐18 7 3 1 5 1 . 2 7  IN V  IN  8"  NW 1 5 1 . 4 3  IN V  IN  8"  NE 1 5 1 . 2 7  INV  OUT  14" SE 75 1 8 3 3 0 3 0 . 9 2 6 4 1 7 0 6 3 . 1 2 1 4 7 . 6 6 3 9 ‐19 1 7 1 3 9 . 2 7  IN V  IN  15 "  N 1 3 9 . 3 2  IN V  IN  18 "  NW 1 3 9 . 1 1  INV  OUT  12" SW 76 1 8 3 3 0 6 6 . 5 2 6 4 1 8 0 9 9 . 5 6 1 4 7 . 4 8 3 9 ‐19 1 9 1 3 8 . 5 6  IN V  IN  15 "  NW 1 2 8 . 8 3  IN V  IN  24 "  SE 12 8 . 2 7  INV  OUT  24" SW 77 1 8 3 3 0 7 7 . 6 6 6 4 1 8 0 8 7 . 8 9 1 4 7 . 6 6 3 9 ‐19 2 0 1 3 8 . 8 8  IN V  IN  12 "  NE 1 3 8 . 9 9  IN V  OU T  12 "  SE 1 3 8 . 9 0  INV  OUT  12" SW 78 1 8 3 3 0 3 5 . 3 4 6 4 1 8 0 1 8 . 2 0 1 4 7 . 0 2 3 9 ‐19 2 1 1 3 7 . 9 4  IN V  IN  12 "  NE 1 3 7 . 8 2  IN V  OU T  12 "  SW 79 1 8 3 2 7 9 9 . 0 1 6 4 1 7 7 7 2 . 5 1 1 4 5 . 3 4 3 9 ‐19 2 5 1 3 4 . 9 8  IN V  IN  18 "  NE 1 3 5 . 0 3  IN V  IN  12 "  NE 1 3 4 . 8 3  INV  OUT  21" SW 80 1 8 3 3 2 6 6 . 0 4 6 4 1 9 3 1 9 . 6 4 1 5 4 . 2 6 3 9 ‐19 3 5 1 4 5 . 8 8  IN V  IN  10 "  SE 1 4 5 . 8 1  IN V  OU T  10 "  NW 81 18 3 2 0 0 7 . 5 3 6 4 1 9 1 1 8 . 6 3 1 5 2 . 0 7 3 9 ‐19 4 0 1 2 9 . 5 8  IN V  IN  24 "  SE 1 2 9 . 6 0  IN V  IN  8"  SE 1 2 9 . 4 8  INV  OUT  24" NW 82 1 8 3 1 9 8 3 . 0 6 6 4 1 9 1 4 1 . 1 5 1 5 2 . 2 9 4 0 ‐19 7 3 1 4 3 . 0 2  IN V  IN  8"  NE 1 4 3 . 2 2  IN V  IN  8"  SE 1 4 3 . 8 1  INV  IN  8" SW 83 1 8 3 8 7 9 2 . 4 4 6 4 1 6 4 3 2 . 7 9 2 9 6 . 2 0 4 4 ‐21 0 3 2 8 7 . 1 7  IN V  IN  8"  SE 2 8 7 . 0 2  IN V  OU T  8"  SW 84 1 8 3 5 2 6 9 . 9 2 6 4 1 8 1 0 5 . 1 7 1 6 5 . 2 8 4 5 ‐21 6 3 1 5 9 . 6 0  IN V  IN  18 "  NW 1 5 9 . 7 4  IN V  IN  15 "  NE 1 5 9 . 4 7  INV  OUT  18" SW 85 1 8 3 4 9 7 5 . 5 3 6 4 1 7 8 3 3 . 3 7 1 5 9 . 7 1 4 5 ‐21 6 5 15 3 . 0 0  IN V  IN  15 "  NW 1 5 3 . 0 5  IN V  IN  18 "  NE 1 5 2 . 7 5  INV  OUT  15" SE 86 1 8 3 5 8 1 7 . 9 2 6 4 1 8 6 7 4 . 0 5 1 7 6 . 7 7 4 5 ‐22 1 2 1 7 1 . 3 7  IN V  IN  8"  NW 1 7 1 . 3 5  IN V  IN  12 "  NE 1 7 1 . 1 7  INV  OUT  14" SW 87 1 8 3 4 6 8 9 . 3 0 6 4 1 9 7 6 1 . 9 1 1 6 0 . 9 2 4 6 ‐22 2 3 1 5 1 . 6 2  IN V  IN  12 "  NE 1 5 1 . 5 4  IN V  OU T  12 "  SW 88 1 8 3 3 6 4 1 . 2 0 6 4 2 0 6 3 2 . 6 5 1 5 3 . 5 5 4 6 ‐22 2 9 1 3 9 . 0 7  IN V  IN  15 "  NW 1 3 8 . 8 1  IN V  IN  15 "  NE 1 3 8 . 7 6  INV  OUT  15" SE 89 1 8 3 4 5 3 3 . 8 1 6 4 1 9 6 9 0 . 1 5 1 5 7 . 5 6 4 6 ‐22 3 2 14 7 . 9 0  IN V  OU T  15 "  SE 90 1 8 3 4 2 3 5 . 6 3 6 4 1 9 9 7 7 . 2 8 1 5 5 . 2 6 4 6 ‐22 3 3 1 4 5 . 7 3  IN V  IN  10 "  NW 1 4 5 . 8 7  IN V  IN  10 "  SW 1 4 5 . 7 0  INV  OUT  15" SE 91 1 8 3 3 8 6 3 . 0 3 6 4 1 8 9 0 3 . 6 2 1 5 1 . 7 6 4 6 ‐22 3 6 1 4 3 . 0 5  IN V  IN  27 "  NW 1 4 2 . 7 0  IN V  IN  15 "  NE 1 4 2 . 7 6  INV  CAPPED  SW 92 1 8 3 3 8 1 0 . 0 7 6 4 1 8 8 5 7 . 2 5 1 5 1 . 4 4 3 9 ‐19 3 4 1 4 0 . 0 2  IN V  IN  15 "  NE 1 4 0 . 4 7  IN V  IN  8"  SE 1 3 9 . 9 8  INV  OUT  15" SW 93 1 8 3 4 3 5 3 . 8 9 6 4 1 8 4 3 1 . 2 4 1 5 5 . 5 2 4 6 ‐22 4 8 1 4 9 . 9 3  IN V  IN  24 "  NW 1 4 9 . 9 6  IN V  IN  24 "  NW 15 0 . 1 6  INV  IN  8" NE 94 1 8 3 2 9 0 9 . 4 8 6 4 2 0 8 0 0 . 0 8 1 5 2 . 3 5 4 7 ‐22 7 1 1 3 2 . 6 1  IN V  IN  15 "  NW 1 3 2 . 0 9  IN V  IN  24 "  SE 1 3 1 . 9 9  INV  OUT  18" SW 95 1 8 3 2 6 5 5 . 8 3 6 4 2 2 3 4 0 . 5 5 1 4 7 . 4 5 4 7 ‐22 8 0 1 3 3 . 8 0  IN V  IN  18 "  NE 1 3 3 . 7 7  IN V  IN  27 "  SE 1 3 3 . 7 2  INV  OUT  27" SW 96 1 8 2 9 4 6 7 . 7 0 6 4 2 5 0 4 7 . 1 7 1 5 8 . 6 2 4 8 ‐23 6 4 1 5 3 . 9 4  IN V  OU T  10 "  NW 97 1 8 2 8 7 6 9 . 7 7 6 4 2 4 1 5 8 . 6 7 1 4 6 . 9 6 4 8 ‐23 7 5 1 3 5 . 8 2  IN V  IN  10 "  NE 1 4 2 . 3 2  +/ ‐  IN V  IN  10 "  NE 1 3 5 . 7 9  INV  IN  10" SW 98 18 3 6 6 6 4 . 5 5 6 4 1 9 2 4 6 . 2 6 1 9 8 . 7 4 5 1 ‐24 2 3 1 9 3 . 4 5  IN V  IN  8"  NW 1 9 3 . 7 2  IN V  IN  6"  NE 1 9 3 . 4 9  INV  OUT  10" SE 99 1 8 3 5 7 7 2 . 0 8 6 4 2 0 8 8 6 . 5 6 1 8 2 . 5 4 5 2 ‐24 4 4 1 7 2 . 0 6  IN V  OU T  12 "  SW 10 0 1 8 3 4 6 7 4 . 4 2 6 4 2 1 7 0 6 . 9 2 1 5 6 . 3 1 5 2 ‐24 5 1 1 4 6 . 3 2  IN V  IN  6"  SE 1 4 5 . 9 8  IN V  IN  8"  NW 1 4 5 . 2 6  INV  OUT  10" SW 10 1 1 8 3 2 5 8 5 . 1 3 6 4 2 3 2 2 9 . 4 3 1 3 8 . 7 5 5 3 ‐24 5 7 A 1 2 9 . 0 3  IN V  IN  27 "  NE 1 2 9 . 0 8  IN V  OU T  15 "  SW 1 2 8 . 9 6  INV  OUT  27" SW 10 2 1 8 2 5 3 2 4 . 0 4 6 4 1 2 8 4 0 . 2 8 2 8 . 5 4 6 ‐10 6 2 3 . 7 7  IN V  IN  8"  NE 23 . 5 5  IN V  OU T  8"  SW 10 3 1 8 2 5 2 4 2 . 6 1 6 4 1 2 7 2 2 . 9 2 2 0 . 1 1 6 ‐73 1 5 . 4 7  IN V  IN  8"  NE 15 . 4 5  IN V  OU T  8"  SW 10 4 1 8 2 1 5 0 7 . 7 2 6 4 1 7 1 3 7 . 2 6 2 5 . 7 3 6 8 ‐11 1 1 3 . 9 5  IN V  IN  15 "  NE 1 0 . 2 8  IN V  IN  18 "  NE 2 0 . 9 1  TOP  6" VERT  BEND 10 5 L I D  BO L T E D  SH U T 10 6 1 8 2 3 7 7 8 . 5 4 6 4 1 3 7 0 3 . 7 5 1 3 . 1 8 6 ‐94 5 . 7 5  IN V  IN  12 "  NE 4. 8 2  IN V  OU T  12 "  NW 10 7 1 8 2 2 0 1 2 . 3 2 6 4 1 5 0 9 7 . 2 9 1 3 . 3 9 7 ‐12 8 6 . 2 8  IN V  IN  6"  SE 5. 9 5  IN V  OU T  15 "  NW 10 8 1 8 2 2 5 6 4 . 6 2 6 4 1 5 8 3 6 . 6 8 1 8 . 3 9 7 ‐14 6 6 . 1 3  IN V  IN  30 "  NW 6 . 3 1  IN V  IN  15 "  NW 5 . 9 5  INV  OUT  30" SE 10 9 1 8 2 2 1 0 0 . 0 7 6 4 1 6 1 9 6 . 3 9 1 7 . 1 7 7 ‐16 6 A 3 . 8 4  IN V  IN  CH A N N E L  NE 3 . 4 7  IN V  IN  54 "  NW 3 . 4 0  INV  OUT  54" SE 11 0 L I D  BO L T E D  SH U T 11 1 L I D  BO L T E D  SH U T 11 2 1 8 3 2 8 8 7 . 4 9 6 4 0 7 5 1 2 . 1 8 1 6 8 . 5 0 9 ‐19 6 1 6 0 . 7 6  IN V  IN  10 "  NW 16 1 . 7 8  IN V  IN  6"  NE 1 6 0 . 7 0  INV  OUT  10" SE 11 3 1 8 3 1 7 0 5 . 4 8 6 4 0 8 7 7 0 . 0 9 1 4 3 . 2 6 9 ‐20 4 1 3 6 . 7 2  IN V  IN  10 "  NW 1 3 6 . 7 2  IN V  OU T  10 "  SW 11 4 1 8 2 1 8 8 9 . 5 6 6 4 1 6 3 7 3 . 7 7 1 7 . 2 1 G S T A T ‐1 2 . 5 0  IN V  IN  72 "  NW 2 . 4 7  IN V  OU T  72 "  SE 11 5 1 8 2 5 5 5 8 . 7 5 6 4 1 3 3 3 5 . 4 9 4 9 . 8 9 J U N C B X ‐1 2 6 . 2 9  CO N C R E T E  SH E L F C O U L D N ' T  ME A S U R E  BO T T O M 45-2163 45-2165 8 '' VC P 18 '' PVC 1 2 ' ' P V C 14 '' HDP E 8 ' ' V C P 8 '' VCP 8 ' ' V C P 8 '' VCP 6 '' CON 8 '' VCP 8 ' ' V C P 6 '' VCP 1 5 ' ' P V C 1 2 ' ' P V C 8 ' ' V C P 1 4 ' ' H D P E 12 '' PVC 8 ' ' V C P 15 '' PVC10 '' HDP E 2 Princ eto n 2 5th C h e l s e a 2 6th A r i z o n a H arvard Alley 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 1 46-2223 46-2232 12 '' VCP 1 5 ' ' V C P 8 '' VCP 8 ' ' V C P 6 ' ' V C P 12 '' VCP 8 ' ' V C P 8 ' ' V C P 6 ' ' V C P 10 '' VCP 6 ' ' V C P H arvard C o l o r a d o Ste w art Y ale B erkeley B r o a d w a y Sta nford Alley 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 2 15-610 15-625 8 ' ' V C P 6 ' ' V C P 8 ' ' V C P 8 ' ' V C P 8 ' ' V C P 8 '' VCP 8 ' ' V C P 6 ' ' V C P 8 ' ' V C P 8 '' VCP 11th 9th Alley Lin coln A l t a M a r g u e r i t a 1 0th 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 3 46-2248 1 8 ' ' P V C 1 8 ' ' P V C 2 7 ' ' H D P E 6 '' VCP 8 ' ' V C P 2 7 ' ' P V C 8 '' VCP 12 '' VCP 2 7 ' ' V C P 6 ' ' V C P 6 ' ' V C P 8 ' ' V C P 8 '' VCP2 Alle y 2 6th B r o a d w a y Prin ceto n P a r k 2 4th 2 5th 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 4 39-1934 39-1935 46-2236 VCP 18 '' VCP 8 '' VCP 6 '' VCP 10 '' VCP 12 '' VCP 2 7 ' ' P V C 1 0 ' ' V C P 15 '' VCP Alley O l y m p i c 2 6 t h C o l o r a d o P e n n s y l v a n i a 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 5 15-603 15-607 6 '' VCP 8 ' ' V C P 8 ' ' V C P 8 '' VCP 8 ' ' V C P 8 '' VCP 6 '' VCP P a l i s a d e s 9th M o n t a n a 7th A l t a Linc oln Alle y 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 6 31-1509 31-1512 39-1917 21 '' VYL O N 24 '' VYL O N 8 ' ' V C P 12 '' VCP 12 '' VCP 1 8 ' ' P V C 1 5 ' ' V C P 1 2 ' ' V C P 18 '' VCP 12 '' VCP 1 5 ' ' V C P 8 ' ' V C P 8 ' ' V C P 21 '' VCP 2 1 ' ' P V C 1 2 ' ' V C P 2 2 1 st C o l o r a d o 1 9th B r o a d w a y Alley 2 0th 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 7 39-191939-1920 39-1921 39-1925 8 '' VCP 6 ' 'V C P 12 '' VCP 8 '' VCP 18 '' VCP 2 4 ' ' P V C21 '' VYL O N 12 '' VCP 18 '' VCP 8 ' ' V C P 6 '' VCP 12 '' VCP 24 '' VYL O N 2 4 ' ' H D P E 2 3rd O l y m p i c B r o a d w a y Clo v erfield C o l o r a d o 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 8 53-2457A V C P 8 '' VCP 8 ' ' V C P 12 '' HDPE27 '' PVC 8 '' VCP 27 '' PVC 8 '' VCP 1 0 ' ' V C P 10 '' VCP 15 '' VCP 15 '' VCP 8 '' VCP 8 '' VCP 8 '' CON 10 3 1 st W ar wic k V i r g i n i a D o r c h e s t e r D e l a w a r e 3 2 n d U r b a n A l l e y 3 3 r d P i c o E x i t 2 R a m p 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 9 39-194040-1973 12 ' ' V C P 2 4 ' ' P V C 1 2 ' ' H D P E 8 '' VCP 2 4 ' ' P V C 18 '' VCP 8 ' ' V C P 8 ' ' V C P 1 2 ' ' V C P 8 '' VCP 8 '' VCP 2 4 ' ' H D P E 10 M i c h i g a n 2 2 nd Clo verfield D e l a w a r e 2 1st 2 6 t h R a m p 2 4th 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 10 31-1526A 8 ' ' V C P 8 ' ' V C P 8 ' 'V C P 8 '' VCP 8 '' VCP 8 '' VCP 8 ' ' V C P 8 '' VCP 8 ' ' V C P 8 ' ' V C P 10 '' PVC8 '' VCP 10 '' PVC 8 '' VCP 8 ' ' V C P 10 2 0th 2 1st M i c h i g a n P e n n s yl v a n i a O l y m p i c 1 9th 1 8th R a m p Alle y 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 11 10-215 10-234 10-236 10-253 V C P 1 8 ' ' V C P 8 ' ' V C P 1 8 ' ' V C P 1 2 ' ' V C P 8 ' ' V C P 6 ' ' V C P 10 '' VCP 10 '' VCP 30 ' ' V C P 60 ' ' R C P 8 ' ' V C P 1 8 ' ' V C P 1 4th W i l s h i r e 3rd W a s h i n g t o n C a l i f o r n i a 2n d C alifornia Incline O ce a n Alle y 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 12 24-1160A 8 ' ' V C P 6 ' ' C O N 8 ' 'V C P 8 ' ' V C P 6 ' ' C O N 8 ' ' V C P 10 '' VCP 8 ' ' V C P 8 ' ' V C P 8 ' ' V C P 8 ' ' V C P 8 ' ' V C P 8 '' VCP 10 '' PVC 10 '' PVC 10 '' VCP 10 '' PVC8 '' VCP 10 '' PVC 10 A l l e y R a m p 1 4th E u clid M i c h i g a n 16th W o o dla n d C e m etary 15th E x i t 1 bOlympic 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 13 11-329 11-330 11-349 11-350 11-353 11-336 11-348 11-331 11-328 11-351 36 '' RCP 3 0 ' ' V C P 8 ' ' V C P 1 8 ' ' V C P 27 '' VCP 24 ' ' 18 '' C90 5 36 ' ' RCP 4 ' ' S- S D R 1 8 ' ' V C P 3 3 ' ' V C P 30 '' VCP 30 '' VYL O N 6 0 ' ' R C P 8 '' VCP 24 '' VYL O N 16 ' ' VC P 4 2 ' ' H D P E 3 9 ' ' V C P 6 '' VCP 1A p pia n B r o a d w a y Ra m p M ain C o l o r a d o O c e a n Fr o nt Alle y O ce a n 2 n d 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 14 33-1626 15 '' VCP 8 '' VCP 8 '' VCP 18 '' PVC 15 '' PVC 8 '' VCP 12 '' PVC 1 5 ' ' P V C 1 0 ' ' V C P 8 '' VCP 8 '' VCP 8 ' ' V C P 1 2 ' ' P V C 8 '' VCP 1 7th 1 8 t h 2 1 s t O c e a n P a r k A ll e y 2 0 t h H i l l P i n e O a k M a p l e O P a r k 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 15 12-385A 12-435 11-303A VCP 8 ' ' V C P 8 ' ' V C P 1 5 ' ' V C P 6 ' ' V C P 12 '' VCP 6 '' VCP 6 ' ' V C P 6 '' VCP 6 ' ' V C P 1 8 ' ' V C P 1 5 ' ' V C P 8 '' VCP 1 5 ' ' V C P 8 ' ' V C P 6 ' ' V C P 8 ' ' V C P 1 0 ' ' V C P 10 P i c o O l y m p i c 7th R a m p P arkin g L ot 4th 6th 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 16 18-756 18-762 18-819 6 '' VCP 1 2 ' ' P V C 1 0 ' ' V C P 8 '' VCP 6 ' ' V C P 8 ' ' V C P 8 ' ' V C P 8 '' VCP 8 '' VCP 8 '' VCP 8 ' ' V C P 8 ' ' V C P 6 '' VCP 8 '' VCP 6 '' VCP 1 B a y M i c h i g a n 6th G r a n t 1 0 th P i c o 9th Alle y 7th 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 17 JUNCBX-1 12-384 12-439 12-375 12-382A 12-382B V C P 12 '' VCP 18 '' VCP 18 '' VCP 1 5 ' ' V C P 8 '' VCP 1 8 ' ' V C P 8 ' ' V C P 8 ' ' V C P 3 0 ' ' V C P 3 6 ' ' V C P 8 '' PVC 8 ' ' V C P 39 '' VCP 8 '' PVC 8 ' ' V C P 8 ' ' V C P 1 5 ' ' P V C 8 ' ' V C P 8 ' ' V C P 12 '' VCP 5th P i c o P a r k i n g L o t B i c k n e l l M a i n 3rd 4t h B a y 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 18 18-803 18-805 18-804 8 '' VCP 8 '' PVC 1 2 ' ' P V C 8 '' PVC 8 ' ' V C P 8 ' ' V C P 6 ' ' V C P 8 '' VCP 6 '' CON 10 '' VCP 14 '' PVC 6 '' VCP 8 ' ' V C P 6 ' ' V C P 8 '' VCP 18 ' ' P V C 8 '' VCP 10 '' VCP 10 '' VCP 1 C e d a r P e a r l G r a n t P i n e K e n s i n g t o n 1 0th 7th P a c i f i c A l l e y S t r a n d 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 19 19-893 19-894 19-911 8 ' ' V C P 8 ' ' V C P 8 '' VCP 8 '' VCP 1 8 ' ' P V C 8 '' VCP 21 ' ' P V C 8 '' VCP 33 ' ' P V C 8 '' VCP 12 ' ' V C P 8 '' VCP 1 5 ' ' V C P 8 '' V C P 8 '' VCP 8 ' ' V C P 8 '' VCP 30 '' VCP 8 ' ' V C P 8 '' VCP 1 A l l e y 10th 1 1th C o p e l a n d M a p l e O a k O c e a n P a r k H i l l A s h l a n d 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 20 13-527 13-528 13-558A V C P 8 '' VCP 8 ' ' V C P 10 '' VCP 8 ' ' V C P 12 '' VCP 1 2 ' ' P V C 8 ' ' V C P 6 ' ' V C P 8 '' PVC 8 ' ' V C P 3 0 ' ' V C P 1 0 ' ' V C P 6 '' VCP 8 '' VCP 8 '' VCP 8 ' ' H D P E 8 '' PVC 8 '' PVC 10 '' VCP 8 ' ' V C P 10 '' VCP 8 '' VCP 8 ' ' H D P E 5th 2 n d 3r d M ain O c e a n P a r k 4th N o r m a n H i l l M i l l s B e a c h Alle y 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 21 19-834 VCP V C P 8 '' V C P 8 '' VCP 8 '' VCP 8 ' ' V C P 8 '' VCP 6 '' VCP 8 '' VCP 8 '' VCP 6 ' ' V C P 8 '' VCP 8 '' V C P 8 '' VCP 8 '' V C P 8 ' ' V C P 8 ' ' V C P 15 ' ' V C P 6 '' VCP 8 '' V C P 12 '' VCP 15 '' VCP 39 '' VCP 33 ' ' P V C 6 '' VCP 6 '' VCP 1 M a c h a d o M a r i n e D e w e y 7 t h L o n g f e ll o w O z o n e R u s k i n B e n tl e y C o m m o n w e a l t h W i l s o n 1 1 t h P i e r A l l e y N a v y 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 22 13-562 7-146 V C P 12 '' VCP 8 ' ' V C P 3 0 ' ' V C P 5 4 ' ' R C P 8 ' ' V C P 8 ' ' V C P 1 2 ' ' V C P 3 6 ' ' V C P 8 ' ' V C P 8 '' VCP 15 '' VCP 1 2 ' ' V C P 8 ' ' V C P K i n n e y N eils o n H i l l A s h l a n d 3rd 2 n d M ain 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 23 13-471 13-473 13A-101 8 ' ' V C P 8 '' PVC 8 '' VCP 8 '' VCP 3 9 ' ' P V C 12 '' VCP 6 ' ' V C P 1 5 ' ' V C P 18 '' VCP 15 '' VCP 8 '' VCP R uth M a r i n e H ig hla n d D e w e y 7 t h 5th R o s e N a v y O z o n e R e n nie B ern a r d 6th D i m m ic k Alle y 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 24 7-128 V C P V C P V C P VCP VCP 10 '' 12 '' VCP 15 '' VCP 5 4 ' ' R C P 1 5 ' ' V C P 15 '' VCP 15 '' VCP 1 5 ' ' V C P 6 '' VCP O c e a n F ro nt A s h l a n d B a r n a r d K i n n e y N eils o n S e a C olo n y 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 25 GSTAT-1 68-112 7-165A 7-166 7-166A 13-546B 68-111 VCP 54 ' ' RC P 3 0 ' ' V C P 3 6 ' ' P V C 3 6 ' ' V C P 36 '' VYLO N 54 '' RCP 36 '' VCP 7 2 ' ' R C P 4 8 ' ' V C P 3 6 ' ' V C P 6 '' VCP 3 0 ' ' V C P 1 5 ' ' V C P 5 4 ' ' R C P 1 5 ' ' V C P 10 '' VCP 15 '' VCP 8 ' ' V C P 1 2 ' ' V C P 8 ' ' V C P 15 '' VCP 15 '' VCP 18 '' VCP 1 5 ' ' V C P 3 6 ' ' V C P 2 n d 3rd H a m pto n N eils o n 4th M ain O z o n e P a c ifi c B a r n a r d R o s e P i e r M a r i n e A l l e y N a v y 0 50 100 Feet 1 inch = 100 feet 1 2 10 1 2345678 910111213 14 151617181920212223242526 ManholesTo Be Surveyed City of Santa Monica,California March 07, 2011 LEGEND Manhole Manhole for Survey Gaging Station Cleanout Junction Box Pumping Station Sewer Main Street SurveyCloseups | J.Steurer | 3/7/2011 Data source: City of Santa Monica, Black & Veatch, Tele Atlas Page 26 Appendix F: Future Planning Developments Appendix F: Future Planning Development Future Planning Developments – Data Provided By City's Planning Department No PROJECT ADDRESS STREET NET NEW PROJECT STATUS WWLoad (cfs) 1 Mixed Use DA 1318 2nd Street 56 DU Under construction 12,995 3 Residential 2316 3rd Street 2 DU Final 464 4 5-Unit Condominium 947 4th Street 5 DU Final 1,160 5 Retail/Office (Michael's Building) 1427 4th Street 7.5 KSF Under construction 1,392 6 3 Unit condo 1919 4th Street 1 DU Final 232 8 5-Unit Condominium 914 5th Street 5 DU Final 1,160 10 SM Post Office Adaptive Reuse 1248 5th Street 46.82 KSF Under construction 8,692 11 Mixed Use DA 1317 7th Street 57 DU Final 13,227 11 1317 7th Street 2.6 KSF Final 483 12 Senior Housing (affordable) 1514 7th Street 26 DU Approved 6,033 14 Residential 1827 9th Street 2 DU Final 464 15 5-Unit Condominium 1211 9th Street 5 DU Under construction 1,160 19 5-Unit Condominium 1750 10th Street 7 DU Under construction 1,624 20 8-Unit Condominium 1444 11th Street 2 DU Approved 464 21 5-Unit Condominium 1518 11th Street 5 DU Under construction 1,160 22 5-Unit Condominium 1533 11th Street 2 DU Approved 464 24 8-unit Condominium 1837 12th Street 4 DU Final 928 25 Condominium 1433 14th Street 19 DU Under construction 4,409 26 6-Unit Condominium 1434 14th Street 5 DU Approved 1,160 27 Media Production 1523 14th Street 7.414 KSF Final 573 28 5-Unit Condominium 943 16th Street 3 DU Final 696 29 11-Unit Condominium 1803 16th Street 10 DU Approved 2,321 31 Residential (5 condos/1 low income) 1807 17th Street 4 DU Approved 928 32 6 Unit Condominium 1949 17th Street 6 DU Approved 1,392 33 3-Unit Condo 1136 18th Street 1 DU Under construction 232 34 Residential 1433 18th Street 5 DU Under construction 1,160 35 Senior Housing (affordable) FAME 1753 18th Street 15 DU Final 3,481 36 3 Unit Condominium 1927 18th Street 2 DU Approved 464 37 Mixed artist studio and Office 1347 19th Street 3 DU Under construction 696 37 1.9 KSF Under construction 353 38 New Science Building Crossroads 1731 20th Street 20.45 KSF Final 3,796 40 Residential 1959 20th Street 2 DU Under construction 464 41 Industrial 1645 21st Street 1 KSF Final 77 42 Residential 1236 25th Street 1 DU Final 232 43 Creative Office (old Papermate site conversion of vacant light industrial to office) 1681 26th Street 7.5 KSF Under construction 1,392 44 8-Unit Condominium 2323 28th Street 6 DU Approved 1,392 45 Mixed Use 702 Arizona Ave 45 DU Final 10,442 45 4 DU Final 928 46 Mixed Use (Sway Building) 525 Broadway 125 DU Final 29,006 47 St. Monica School Expansion (also 1030 Lincoln) 725 California Ave. 11.887 KSF Final 5,517 50 Affordable Housing (Step Up on Fifth) 520 Colorado 34 DU Final 7,890 52 Lionsgate/Post Production DA 2834 Colorado 133 KSF Under construction 10,288 52 9 KSF Under construction 696 53 Village Trailer Park - mixed use DA 2930 Colorado 324 DU Under construction 75,184 53 24.94 KSF Under construction 4,630 53 4.2 KSF Under construction 780 54 SM Place Movie Theater 315 Colorado 500 SEA TS Final 2,321 56 6-Unit Condominium 1171 Franklin Street 6 DU Final 1,392 57 Apartments 1541 Franklin Street 5 DU Approved 1,160 59 45-Unit Affordable Condominium 1943-59 High Place 38 DU Final 8,818 61 Residential/retail building 207 Hollister 1 DU Final 232 62 Edison Elementary School 2425 Kansas 65 KSF Final 30,167 65 2 story commercial 3204 Lincoln Blvd 2.853 KSF Approved 221 67 Retail/Office 2321 Main St. 0.9 KSF Final 167 67 2 KSF Final 371 70 423 Ocean Avenue 423 Ocean Ave 4 DU Pending 928 73 4 story residential 1112-1122 Pico Blvd 28 DU Approved 6,497 73 4 DU Approved 928 75 3-Unit Condo 1127 Princeton 2 DU Final 464 76 Mixed Use DA (Mini) 1402 Santa Monica Blvd 33.75 KSF Under construction 6,265 77 Affordable Housing (addressed as 1349/1347 Yale Street) 2901 Santa Monica Blvd 52 DU Pending 12,067 77 5.1 KSF Pending 947 78 Santa Monica College AET Campus Expansion (SMC jurisdiction) 1660 Stewart St 20 KSF Under construction 9,282 78 28 KSF Under construction 12,995 79 Pico Branch Library 2200 Virginia Avenue 7.5 KSF Final 580 80 Mixed-Use Condos/Commercial 2300 Wilshire Blvd 30 DU Under construction 6,962 80 22.3 KSF Under construction 4,140 80 2.7 KSF Under construction 501 81 Mixed-Use Hotel (adaptive reuse of historic building) 710 Wilshire Blvd 150 KSF Under construction 27,873 80 9.11 KSF Under construction 1,691 83 6-Unit Condominium 1319 Yale Street 1 DU Final 232 84 Civic Center Specific Plan Colorado to north, Pico to south, 4th to east, Ocean to west 318 DU Final 98,389 84 53 KSF Approved 16,398 84 25 KSF Final 7,735 84 40 KSF Approved 12,376 84 20 KSF Approved 6,188 84 12.5 KSF Approved 3,868 85 15-Unit Condominium (Turtle Villas) 1211 12th Street 13 DU Approved 3,017 86 Parking Structure 6 Rebuild 1431 2nd Street 350 spac es Final 10,829 87 New Courtyard by Marriot DA 1554 5th Street 74.25 KSF Under construction 28,716 88 New Hampton Inn and Suites DA 501 Colorado 76.25 KSF Under construction 29,490 93 4th/Arizona 1301 4th Street 203.104 KSF Pending 37,704 93 17.645 KSF Pending 3,276 93 117 KSF Pending 21,720 93 12 KSF Pending 2,228 93 48 DU Pending 11,138 94 Arclight 1318 4th Street 2700 SEA TS Pending 835,380 94 2.5 KSF Pending 464 94 2.25 KSF Pending 418 95 Mixed Use DA 1235 5th Street 24 DU Pending 5,569 95 3 DU Pending 696 95 1.36 KSF Pending 252 99 Mixed Use DA 1415-1423 5th Street 50 DU Approved 11,603 99 14 DU Approved 3,249 101 Mixed Use affordable housing 1437 5th Street 43 DU Approved 9,978 102 Mixed Use DA 1313-1325 6th Street 50 DU Pending 11,603 102 10 DU Pending 2,321 102 2.717 KSF Pending 504 104 Mixed Use DA 1437 7th Street 60 DU Pending 13,923 104 10.14 KSF Pending 1,882 106 21-Unit Condominium/2020 Virginia 2002 21st Street 4 DU Pending 928 106 2 DU Pending 464 107 Mixed Use DA (63 hotel rooms) 603 Arizona Ave 27.5 KSF Pending 11,695 109 500 Broadway DA (Fred Segal) Site 500 Broadway 249 DU Approved 57,780 109 60 DU Approved 13,923 109 22.997 KSF Approved 4,269 110 Mixed Use DA (Performance Bicycles) 501 Broadway 65 DU Pending 15,083 111 Wyndam Hotel DA (211 rooms) 120 Colorado 104190. 647 KSF Pending 39,170 111 25 DU Pending 5,801 111 3 DU Pending 696 111 5.47 KSF Pending 1,015 111 17.244 KSF Pending 3,201 112 Mixed Use DA 525 Colorado 47 DU Pending 10,906 113 Mixed Use DA 1431 Colorado 42 DU Pending 9,746 113 8 DU Pending 1,856 114 Mixed Use DA (Fritto misto) 601-609 Colorado 80 DU Pending 18,564 114 20 DU Pending 4,641 114 2.125 KSF Pending 394 117 6-Unit Condominium 1134 Euclid Street 3 DU Pending 696 118 Mixed Use DA 1318 Lincoln Blvd 39 DU Pending 9,050 118 4 DU Pending 928 120 Mixed Use DA (Upscale furniture building) 1437-1443 Lincoln Blvd 35 DU Pending 8,122 120 8 DU Pending 1,856 120 3.598 KSF Pending 668 122 Mixed Use DA (Denny's site) 1560 Lincoln Blvd 80 DU Approved 18,564 122 20 DU Approved 4,641 122 9.402 KSF Approved 1,745 123 Mixed Use DA (Norm's site) 1601 Lincoln Blvd 72 DU Approved 16,708 123 18 DU Approved 4,177 123 6.448 KSF Approved 1,197 124 Mixed Use DRP (Wertz Bros site) 1613-1637 Lincoln Blvd 192 DU Pending 44,554 125 Mixed Use DRP (Aarons brothers) 1641 Lincoln Blvd 68 DU Approved 15,779 125 10 DU Approved 2,321 126 Mixed Use DRP (Joann's Fabric site) 1637 Lincoln Blvd 96 DU Pending 22,277 127 Mixed-Use DRP 1650 Lincoln Blvd 84 DU Pending 15,594 127 16 DU Pending 3,713 128 Mixed-Use DRP 1660 Lincoln Blvd 49 DU Pending 11,370 128 25 DU Pending 5,801 130 2919 Lincoln/802 Ashland 2919 Lincoln Blvd 10 DU Under construction 2,321 134 Miramar Hotel Revitilization Plan DA 1133 Ocean Ave 35.056 KSF Pending 6,508 134 120 DU Pending 27,846 134 1127/1129 2nd Street 40 DU Pending 9,282 134 16.69 KSF Pending 3,098 134 8.704 KSF Pending 1,616 135 Mixed Use DA (bowling alley) 234 Pico Blvd 79 DU Pending 18,332 135 12 DU Pending 2,785 135 Hotel/Mixed Use DA (Ocean Avenue) 101-129 Santa Monica Blvd 22 DU Pending 5,105 135 1327-1333- 1337 Ocean Ave 5 DU Pending 1,160 135 165 KSF Pending 30,631 135 40.722 KSF Pending 7,560 135 21.75 ksf Pending 4,038 137 Mixed Use 1802 Santa Monica Blvd 5 DU Pending 1,160 137 15.1 KSF Pending 2,803 138 Mixed Use DA 3008 Santa Monica Blvd 25 DU Under construction 5,801 138 3 DU Under construction 696 138 0.246 KSF Under construction 46 140 Mixed Use DA 3032 Wilshire Blvd 80 DU Pending 18,564 140 20 DU Pending 4,641 140 4.232 KSF Pending 786 Appendix G: MAPS Evaluation Report MAPS SIPHON / JUNCTION BOX 2 JUNCTION BOX 1 Appendix H: City’s Net Zero Ordinance •Assess Historical and Prepare Future Sewer Flow Projections •Develop New Sanitary Sewer System Hydraulic Model •Perform System Analysis (Existing and Future Conditions) •Develop System Recommendations •Prepare a Capital Improvement Program •Previous Sewer Master Plan 1992 2017 Sanitary Sewer System Master Plan Goals & Objectives Hydraulic Model Review: SSSMP Hydraulic Analysis Results -Future LUCE/DCP Projects Existing Conditions Flow Results Future Conditions Flow Results •5-Ye ar Capital Improvement Program proposed: –Include Capacity Improvements and Pipe Replacements –Field verify up to 3% (approximately 75) additional locations for physical configuration, elevation, and/or flow characteristics Description FY 2018/2019 FY 2019/2020 FY 2020/21 FY2021/2022 FY 2022/2023 Capacity Improvements $2,000,000 $1,200,000 $1,600,000 $2,000,000 Field Review Services $100,000 $80,000 Pipeline Replacements $900,000 $1,800,000 $1,400,000 $2,920,000 $1,000,000 TOTAL ANNUAL CIP $3,000,000 $3,000,000 $3,000,000 $3,000,000 $3,000,000 Master Plan Summary of Findings -CIP Recommended Action: Staff recommends that the City Council approve the 2017 Sanitary Sewer System Master Plan