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CITY OF PLEASANTON KIER & WRIGHT DRAFT ENGINEERING SUMMARY CIVIL ENGINEERS&SURVEYORS,INC. OF ROADS AND INFRASTRUCTURE Anticipated flows for the two watersheds are approximated at 110 cubic feet per second (cfs) and 230 cfs, respectively. Watershed #1 will utilize existing 24" and 36" storm drain systems. Watershed#2 will employ storm drain pipes from the 12-18" size up to 48". See Exhibits SD-01, SD-04, SD-05 and SD-06 for schematic layout of recycled water facilities for each option. All pipe systems will be designed per the design standards of the City of Pleasanton. Pipe sizes, manhole spacing, inlet locations, etc. will meet or exceed these standards. Sanitary Sewer The East Pleasanton Specific Plan will have its sanitary sewer needs met by the installation of 8" to 12" sewer lines that will accommodate the different proposed land uses throughout. The Specific Plan Area will have a network of underground mains that will convey most of the effluent from the Plan Area to a new sanitary sewer lift station,the approximate location is as delineated on Exhibits SS-01, SS-04,SS-05 and 55-06 for each option.. The exact location of the sewer pump station will be finalized after final option is chosen. This lift station will provide pumping capacity up to 1.39 million gallons per day (mgd). It is anticipated that this station will pump the collected effluent through a 6"-8"force main that will be constructed from the pump station to El Charro Road. This force main will connect to a gravity system in El Charro Road and extend northerly along El Charro Road. The pipe system will extend to the west and connect to an existing 27" trunk line sized specifically to handle the flows from the project and flow west to the the Pleasanton Waste Water Treatment Plant. See Exhibits for schematic layout of sanitary facilities. The updated Sanitary Sewer Master Plan by Carollo Engineers specifically provides details for the trunk line that serves the Plan Area. All pipe systems will be designed within the design standards of the City of Pleasanton. Pipe sizes, manhole spacing, etc. will meet or exceed these standards. Page 14