To: Honorable Mayor and Members of City Council
From: Julie Lucido, Public Works Director
Prepared By: Jessica Lowe, Deputy Public Works Director
TITLE:
Title
Rose Lane Sewer Separation - Reimbursement Agreement with the Napa Sanitation District
LABEL
RECOMMENDED ACTION:
Recommendation
Adopt a resolution authorizing the Public Works Director to execute on behalf of the City a Reimbursement Agreement with the Napa Sanitation District in an amount of up to $300,000 to reimburse the District for a portion of the cost to construct a sewer separation project on Rose Lane in the City of Napa; amending the Capital Improvement Plan as Documented in Council Budget Amendment No. 2P5; and determining that the actions authorized by this resolution are exempt from CEQA.
Body
DISCUSSION:
The Rose Lane Sewer Separation is an existing CIP project that will remove a longstanding cross connection between the City's storm drain system and the Napa Sanitation District sanitary sewer system.
Sewer systems that convey both sanitary sewage and stormwater through a single pipe are referred to as combined sewer systems. Outside of heavy rain events, these systems can adequately convey flows to wastewater treatment facilities. During heavy rainfall or when the capacity of the combined sewer system is exceeded, the untreated sewage and stormwater can overflow, causing backups and overflow onto surface streets or designed overflow locations. This occurrence can lead to regulatory fines, operational issues at the sewage treatment plant, and poor water quality. Because of the public health implications, combined sewer systems have not been permitted since the first half of the 20th century, and largescale efforts to separate combined sewers have been undertaken.
At the end of Rose Lane, the City's storm sewer is connected to a Napa Sanitation District (NapaSan) sanitary sewer line. A project to separate the two systems was approved by Council in the FY 16/17 budget. ...
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