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CITY OF PLEASANTON KIER & WRIGHT DRAFT ENGINEERING SUMMARY CIVIL ENGINEERS&SURVEYORS,INC. OF ROADS AND INFRASTRUCTURE The City's hydraulic models for the potable and non-potable water system will be used to size the pipelines needed on-site for both distribution systems. The size of the pipelines for the major streets is expected to be a maximum of 12" W. The models will also identify the necessary improvements needed off-site to ensure the City's service criteria for the development area are met. The water pipe system will connect to the new transmission lines constructed within El Charro Road east of Staples Ranch and to the existing waterline system within Ironwood Drive and Valley Avenue. It is anticipated there will be minimal effects to the potable water system because the exchange program will result in no net change for annual potable water demands. As development proceeds within the Specific Plan area,the City will help identify the necessary expansion of the recycled water system to ensure water supplies for the proposed development. All potable water and recycled water distribution system facilities will be located within street rights of way. See Exhibits W-01, W-04,W-05 and W-06 for schematic layout of potable water facilities for each option.. Recycled Water Infrastructure As mentioned above,the City has a hydraulic model of the existing and assumed recycled water distribution system. The distribution system is ultimately anticipated to be fed from the City's wastewater facility. There is an agreement with the City of Livermore for services to the east side of the City, until the distribution system can be expanded from the west to the Specific Plan Area. The hydraulic modeling efforts are anticipated to show that on-site irrigation demands will be initially served from recycled water from the City of Livermore's distribution system. Off-site facilities will be identified with the modeling efforts and are anticipated to be limited to the extension of pipeline facilities to the Specific Plan Area from El Charro Road directly west of Staples Ranch and north of the Plan Area.The City of Pleasanton has turnouts from the City of Livermore and DSRSD that can be used to provide recycled water. Expansion of the Pleasanton recycled water system will occur as part of the water exchange program described above and described in more detail in the WSA. See Exhibits RW-01, RW-04, RW-05 and RW-06 for schematic layout of recycled water facilities for each option. Storm Drain The developable area that comprises the East Pleasanton Specific Plan Area totals approximately 406- acres. The Chain of Lakes is not included in this calculation. The Western Watershed#1 is approximately 92-acres and contains the Kiewit Property, Pleasanton Garbage Service facility and the Operations Service Center. This area is planned to drain through the existing underground system in Ironwood Drive. The remaining eastern watershed is 314-acres that will drain through new underground infrastructure into Cope Lake (the lake situated on the south easterly edge of the site). Eighty acres of this is open space and parks. Page 13