SR-6-L (72)
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Santa Monica, Cal1fornia
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Council Meeting November 26, 1991
TO:
Mayor and City Council
FROM:
City staff
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SUBJECT:
Recommendation to Authorize the City Manager to
Negotiate and Execute a Contract with the City of Los
Angeles for the Dry-weather Low Flow Diversions at the
Pico-Kenter Storm Drain.
INTRODUCTION
This report recommends that City council authorize the City
Manager to negotiate and execute a contract with the City of Los
Angeles for the provision of dry-weather low flow diversions at
the Pico-Kenter storm drain to the sewer system.
BACKGROUND
For over a decade, the Pico-Kenter storm drain has been a source
of concern regarding possible releases of biological and chemical
contaminates into the Santa Monica Bay. The contamination which
includes human pathogens poses a potential risk to public health.
Sixty percent of the geographic area of the Pico-Kenter drainage
basin is in Los Angeles. Although the flow is highly variable
and difficult to quantify, at least half of the flow appears to
enter from Los Angeles.
Several measures are being undertaken by various agencies for
better pollution control and elimination. These agencies include
the Cities of Santa Monica, Los Angeles, the county of
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Los Angeles, the Santa Monica Bay Restoration project, the Los
Angeles Regional Water Quality Control Board, the State Water
Resources Control Board, and the united states Environmental
Protection Agency. The Cities of Santa Monica and Los Angeles
and the County of Los Angeles funded a "by-pass line" to carry
the dry-weather low flow under the beach and six hundred feet
(600 ft.) into the ocean as one measure undertaken to effect
dry-weather pollution. The by-pass line was constructed and
opened for operation in the Stlmmer of 1991. The City of Santa
Monica also developed a pilot sensor and data communications
system which detects fuel hydrocarbon spills in the storm drain,
closes the by-pass line, and alerts response personnel. The
by-pass and sensors have been in operation since the summer of
1991. Santa Monica
Reduction Ordinance,
early 1992.
is presently drafting an Urban Runoff
which will be brought before Council in
until recently, requests to direct the storm drain low flow to
Hyperion for treatment have been turned down by the City of Los
Angeles. However, at this time, City of Los Angeles officials
have agreed to reconsider accepting the dry-weather flow on an
interim basis and share equally the costs of construction,
operation and maintenance and treatment of the effluent at
Hyperion. Staff representatives of Los Angeles and Santa Monica
are now working to develop an agreement which will be fair and
equitable for both the City of Santa Monica and the City of Los
Angeles. It is presently anticipated that the term of this
agreement will run from the point of final approval by both
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c~ties until October 1994. The term of the agreement cannot be
extended without the further approval of both parties, and it is
stated in the agreement that the development of an appropriate
reuse/reclamation project is the ultimate goal of both cities.
BUdget/Financial Impact
It is estimated that construction of the diversion system will
cost approximately $25,000.00. This cost will be shared equally
by the city of Santa Monica ($12,500) and the City of Los Angeles
($12,500). Funds for santa Monica's construction costs for the
diversion system are available in eIP account number
31-760-661-20092-8900-99126. The draft agreement also proposes
that the operation and maintenance costs for the diversion system
and the actual costs for treatment of the diverted storm drain
effluent at the Hyperion Treatment Plant will be shared equally
by the City of Los Angeles and the City of Santa Monica. The
operation and maintenance costs are estimated to total $10,000
per year, and the sewage disposal costs are estimated to total
$110,000 per year. The estimated sewage disposal costs are based
on a dry-weather flow estimate of 300,000 gallons per day. santa
Monica's share of the 0 & M and treatment costs would therefore
total $60,000 per year. Funds for this cost are available in
wastewater Division account number 31-500-661-00000-5512-00000
"L.A. Sewage Disposal".
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Recommendation
It is recommended that City council authorize the City Manager to
negotiate and execute an agreement with the City of Los Angeles
to divert Pico Kenter dry-weather runoff into the sewer system.
prepared by:
stanley E. Scholl, Director of General Services
Anthony Antich, City Engineer
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