TO:
Honorable Mayor and Members of the City Council
THROUGH:
Mark Danaj, City Manager
FROM:
Tony Olmos, Public Works Director
Raul Saenz, Utilities Manager
SUBJECT:Title
Approve Professional Services Agreement with ValveTek Utility Services, Inc. in the Amount of $319,749 for Flushing and Disinfection of 101 Miles of the City's Potable Water System (Public Works Director Olmos).
APPROVE
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Recommended Action
RECOMMENDATION:
Staff recommends that the City Council approve a sole-source Professional Services Agreement with ValveTek Utility Services, Inc. in the amount of $319,749 for flushing and disinfection of 101 miles of the City's potable water system (Attachment 1).
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FISCAL IMPLICATIONS:
Funds are available in the FY2015-2016 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 standards, the City of Manhattan Beach's water distribution system should be comprehensively flushed every year by a technique known as unidirectional flushing (UDF). UDF consists of isolating a particular pipe section or loop, typically through closing appropriate valves in a sequential manner, then systematically opening fire hydrants to force the water through the pipes 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 isolated loop is clear, which can take from 30 minutes to over an hour. UDF is a preventative maintenance program that results in flushing water to waste, which ultimately ends up in the ocean by way of the City's stormwater system. It is estimated that approximately 26 million gallons, ...
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