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EXHIBIT "A" <br /> <br /> Kennedy/Jenks Consultants <br /> Engineers & Scientists <br /> 2191 East Bayshore Road <br /> Suite 200 <br /> Palo Alto, California 94303 <br /> 650-852-2800 <br /> FAX <br /> 650-856-8527 <br /> <br />9 July 2003 <br /> <br />Mr. Peter Vorametsanti <br />Senior Civil Engineer <br />City of Redwood City <br />1017 Middlefield <br />Redwood City, CA 94063 <br /> <br />Subject: Proposal for Engineering Services <br /> Maple Street Pump Station Interceptor - Peak Wet Weather Capacity <br /> K/J B03062 <br /> <br />Dear Peter: <br /> <br />This is a follow-up our meetings and conversations regarding several proposed new <br />developments in the City of Redwood City that will significantly impact the overall volume of <br />wastewater that must be routed into the SBSA system for conveyance to and treatment at the <br />SBSA treatment facility in Redwood Shores. The treatment facilities are currently in the process <br />of being expanded (the SBSA Stage 2 Expansion Program) to handled the increase in average <br />dry weather flow (ADWF) as the dry weather capacity is purchased. Sufficient ADWF capacity <br />is planned to manage the projected flows from these planned developments. However, the <br />SBSA conveyance and treatment facilities are currently at their maximum capacity for handling <br />peak wet weather flows (PWWF). Currently, there is no provision in the Stage 2 Expansion <br />program for increasing the PWWF capacity of the SBSA facilities. <br /> <br />Redwood City's PWWF allocation in the SBSA system is 25.9 MGD. That flow has been <br />exceeded several times in the past few years. Presumably, the additional flow from the <br />proposed new developments will exacerbate this problem. SBSA is currently evaluating <br />alternatives for increasing the hydraulic capacity of both the conveyance and treatment facilities <br />by up to 9 MGD. Some of this additional hydraulic capacity could be made available to <br />Redwood City. <br /> <br />If SBSA is able to provide additional PWWF capacity, then the City must be able to convey the <br />additional peak flows to the SBSA system. In Redwood City's case, the flows must be <br />conveyed to either the Maple Street Pump Station or pump through the new 10-inch connection <br />serving the Seaport Blvd./Pacific Shores area. Currently, the combined peak flows from the <br />Maple Street Pump Station (MSPS) and the 10-inch connection should not exceed the City's <br />total allotment of 25.9 MGD. <br /> <br />g:\bu sdeV~2003~proposals~Jetterp mps\b(~3062_redwoodcity_maples~'ee~flow~le~r.doc <br /> <br /> <br />