AgdaPkt 2002-07-15 - Laserfiche WebLink

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EXHIBIT "A" Scope of Work Introduction The City of Redwood City (The City) purchases all of its potable water from the San Francisco Public Utilities Commission (SFPUC). There are 13 metered connections to four SFPUC pipelines located in Redwood City. The SFPUC normally supplies almost all of its water deliveries from a combination of local Bay Area supplies and diversions from the Tuolumne River through the Hetch Hetchy Water and Power Project 0tetch Hetehy). Redwood City does not provide any additional treatment to the treated water purchased from SFPUC. The City's water system services Redwood City and portions outside the corporate limits, including Cafiada College and the Emerald Lake Hills area. The City's service area presently covers approximately 10.3 square miles. Service is provided to areas between Highways 280 and l0 l, Whipple Avenue and Marsh Road in the area east of Highway 101, and in the Redwood Shores development. The City's service area varies in elevation, from about mean sea level along Seaport Boulevard to over 800 feet in the Emerald Lake Hills area with 17 pressure zones in the system. The City's distribution system consists of 208 miles of water mains, mostly of ductile iron, approximately 5% of older 2-inch galvanized iron, 6-inch polyvinyl chloride (PVC) pipe, and some asbestos pipe, 1812 fire hydrants and 140 dead ends. The City has an on-going main replacement program in which undersized mains are replaced with C-900 PVC pipe. The City's twelve storage facilities have a total capacity of 21.24 million gallons. The storage tanks and reservoirs are inspected once every five years. Cleaning, recoating, repairs and structural work are performed as needed. The City has ten pump stations located throughout the system. The City routinely monitors the distribution system for bacteriological quality, chlorine residual, general physical parameters and trihalomethanes. The City is conducting on-going monitoring as required under the Lead & Copper Regulation. City personnel routinely collected 23 samples per week for bacteriological analysis. The City has dedicated sampling stations throughout the distribution system. The SFPUC is planning to change their disinfection method from chlorine to chloramines in the summer of 2003, for the primary purpose of reducing the concentration of chlorine-related disinfection byproducts in the water.