TO:
Honorable Mayor and Members of the City Council
THROUGH:
Mark Danaj, City Manager
FROM:
Stephanie Katsouleas, Director of Public Works
Shawn Igoe, Utilities Division Manager
SUBJECT:Title
Resolution Authorizing the City Manager to Execute a Professional Services Agreement with ValveTek Utility Services, Inc. for $81,844 for Flushing and Disinfection Services of 30 Miles of the City's Potable Water System (Public Works Director Katsouleas).
APPROVE; ADOPT RESOLUTION
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Recommended Action
RECOMMENDATION:
Staff recommends that the City Council adopt a Resolution authorizing the City Manager to execute a Professional Services Agreement with ValveTek Utility Services, Inc. for $81,844 for flushing and disinfection of 30 miles of the City's potable water system.
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FISCAL IMPLICATIONS:
Funds are available in the FY2016-2017 Public Works Department's Water Maintenance and Water Pumping Operating budgets for these services.
BACKGROUND:
In order to maintain residual chlorine disinfection in the water system, minimize discoloration and continue to meet Regional Water Quality Control Board drinking water standards, the City of Manhattan Beach's water distribution system should be comprehensively flushed on a regular basis by a technique known as unidirectional flushing (UDF). UDF uses a combination system pressure and opening of fire hydrants to force potable water through pipes segments at high velocity. This increased velocity scours and cleans the pipe walls, flushes sediment from the mainline pipes and removes aging water from the water distribution system. The flushing continues until the water within the pipe segment is clear, which can take 30 minutes or more to achieve. Note that each segment that undergoes UDF is isolated during the procedure.
Historically, water released through the hydrants during flushing was released to the storm drain system. But, in response the sustained regul...
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