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Pimlico Drive Turnout mad Pipeline Project Enr~ironneeata/ Checklist buildings throughout the City. The tank will be vented to the outside and have a level detector with an alarm connected to the SCADA system so that the tank levels can be monitored remotely from the City's control center, similar to the alarms used at other City fluoridation facilities. The alarn~ will transmit information to the City's operational control center if an unscheduled change in the tank level occurs. An operator will be immediately sent to the fluoridation building to determine if a leak or upset has occurred and take corrective actions, as needed. Hydrofluorosilic acid, which is used throughout the City in the fluoridation process at other fluoridation facilities, will be delivered to the fluoridation building approximately 14 times a year. The frequency of deliveries will depend on the time of year, with deliveries roughly every two weeks during the summer and less frequently in the winter. The chemical will be delivered by a commercial company and the tank will be filled to 450 gallons per the City's direction providing a 50-gallon freeboard to minimize potential for spills during filling. All procedures for transporting the chemical and filling the tank will be approved by the Livermore Pleasanton Fire Department, as are operations at all fluoridation facilities throughout the City (Kathleen Campbell, personal communication Daniel Smith, Utilities Superintendent, City of Pleasanton, April 5, 2006). Power for the turnout and fluoridation facility will be provided from an underground connection with the adjacent residential underground distribution system. Low voltage exterior lighting will be provided at the fluoridation building for security and maintenance needs. The fluoridation building will be controlled by a Tesco L1Q2000 remote terminal unit (RTU), with data telemetered via radio to the City operations center. The radio antenna will be approximately 20 to 25 feet high and will consist of a mast and radio receiver mounted at the top of the mast. The antenna will be mounted to the fluoridation building and extend approximately 8 to 10 feet above the building. Water Transmission Pipeline Approximately 2,700 feet of new 20-inch ductile iron pipe will be installed within Pimlico and Brockton drives. Pipe connections will be made to the new turnout facilities and to an existing 27-inch pipeline owned by the City of Pleasanton. Connection to the 27-inch pipeline is on Pimlico Drive, approximately 120 feet east of Santa Rita Road. Approximately 50 feet of the pipeline will be placed within a concrete planter-box on the south side of Pimlico Drive where the pipeline crosses the Gone 7 box culvert channel near the proposed turnout site. The planter box will be approximately 3 feet high by 3 Feet wide. Pipelines are routinely placed in planter-boxes throughout the City where the pipelines cross channels within the road rights-of--way. Santa Rita Control Valve Vault The Santa Rita control valve vault will be located underground in a dedicated public utility easement off the western edge of Santa Rita Road. The new control valve vault station will be located in the lawn area adjacent to Rose Pavillion parking lot. The precast concrete vault will be about 9 feet by 5 feet and about 6 feet deep below grade. The vault branch piping will be connected to the existing 24-inch water pipeline located in the western-most lane on City of Pleasanton 8 Wmzler & Kelly Draft Initial Shu1y/Proposed Negative Declaration August ?006 04263501