SR-080527-1GCity Council Meeting: May 27, 2008
Agenda Item: I
To: Mayor and City Council
From: Joan Akins, Acting Director - Environmental and Public Works
Management
Subject: Charnock Well Field Restoration Project
Recommended Action
Staff recommends that the City Council:
1. authorize the City Manager to negotiate and execute athree-year Professional
Services Agreement with WorleyParsons Komex for an amount not to exceed
$900,000 to provide Technical Oversight and Support Services for the Charnock
Well Field Restoration Project; and
2. appropriate $900,000 from the Charnock Fund balance into Account No.
0050878.589500
Executive Summary
The Charnock Well Field Restoration Project (Project) will use the design-build project
delivery method to implement the necessary improvements to restore the Charnock
Well Field as a drinking water supply source. During the design-build process, the City
requires technical oversight and support services to ensure that the improvements
proposed by the design-build contractor are appropriate, and to assist the City in
obtaining operational permits. A selection process was conducted WorleyParsons
Komex was the only respondent. Following staff evaluation the firm is best suited to
perform the services needed. Funds are available in the Charnock Fund balance.
Background
In June 1996, the drinking water supply wells at the Charnock Well Field were shut
down due to the detection of gasoline additive methyl tertiary-butyl ether (MTBE) in the
water supply. Since then, the City relies on imported water from the Metropolitan Water
District of Southern California to meet customer demand as the process to mitigate the
contamination of the Charnock sub-basin is addressed.
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In December 2006, the City assumed full control of restoring the Charnock Well Field
through a new settlement agreement with the oil companies. On February 26, 2008,
City Council authorized the City Manager to negotiate and execute adesign-build
agreement with Black & Veatch Corporation, Agreement No. 8892 (CCS), in an amount
not to exceed $4,300,000 for the Charnock Well Field Restoration Project.
The Project will restore the Charnock Well Field as a drinking water supply. The
design-build project delivery method uses a single entity, and combines design and
construction phases to ensure timely completion of the project. Staff anticipates that
water deliveries from the new treatment facility will begin at the end of 2010.
Discussion
The Charnock Well. Field Restoration Project will employ several technically complex
water treatment processes to restore the City's groundwater supply. The treatment
system proposed at Charnock consists of filtration with granular activated carbon to
remove the MTBE from three contaminated wells. The treated groundwater will be
blended with water pumped from two clean wells, and the total flow will be pumped to
the Arcadia Water Treatment Plant for. final treatment and distribution. Final treatment
system upgrades necessary at the Arcadia Water Treatment Plant include softening,
disinfection and fluoridation. The project is subject to environmental review and will be
presented to City Council in summer 2008.
The City requires assistance from an independent consultant to evaluate the
improvements proposed by the design-build contractor. This evaluation will ensure that
the processes proposed are in the best long-term interest of the City, as the City plan to
operate the facility for 10 years after construction is complete.
Technical oversight and support services are required throughout the design-build
process including the pre-construction, construction, demonstration/permitting and
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commissioning-phases. This contract wilt cover athree-year period ending June 30,
2011, which includes six months of technical support services after the City begins
operating the Charnock Water Treatment Facility in January 2011.
Consultant Selection
On January 16, 2008, a Request for Proposals was sent to 18 companies for Technical
Oversight and Support Services for the Charnock Well Field Restoration Project. On
February 14, 2008, one company, WorleyParsons Komex submitted a proposal.
A selection committee comprised of staff from Environmental and Public Works
Management Department evaluated the proposal. The selection criteria included staff
qualifications and experience; drinking water treatment processes experience;
groundwater restoration experience; and regulatory knowledge in permitting water
treatment facilities. WorleyParsons Komex has provided consulting services to the City
relative to the MTBE contamination at the Charnock Well Field since the problem was
discovered in 1996. They have provided technical expertise and have an understanding
of Santa Monica's unique geological composition. Additionally, WorleyParsons Komex
assisted the City in developing the preliminary technical reports that serve as the basis
of the design-build approach for the Charnock Well Field Restoration Project.
WorleyParsons Komex will provide professional services to the City that will include:
technical support and process evaluation; technical liaison between with the City and
the design-build contractor; assistance in the permitting process; and preparation of
technical memoranda for the groundwater flow, groundwater transport models and
model simulations and development of the regional groundwater monitoring program.
WorleyParsons Komex is at the forefront of the industry through investigation, mitigation
and remediation of leaking underground storage tank sites that result in contamination
of public drinking water wells by MTBE. Worley Parsons performed a detailed
characterization of contaminant and migration sources to evaluate the MTBE
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contamination for the Cambria Community Services District in Cambria, CA; and
successfully designed and constructed a treatment system to remove MTBE from the
groundwater. For these reasons, the selection committee recommends executing a
professional services agreement with WorleyParsons Komex for technical oversight and
support services required for the Charnock Well Field Restoration Project.
Financial Impacts & Budget Actions
Funds in the amount of $900,000 need to be appropriated .from the Charnock Fund
balance into Account No. 0050878.589500 "Charnock Well Field Restoration Project".
Prepared by: Spiros Lazaris, P.E., Civil Engineer
Approved:
Forwarded to Council:
Joa kins P. ont Ewell
Acting Director -Environmental and City Manager
Public Works Management Department
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Reference Contract
No. 8929 (CCS).