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Piurlico Drive Turnout anr! Pipeline Project Environmental Ckecklist Santa Rita Road. The control valve will have a 5,000 gpm maximum flow capacity and be controlled remotely. "I'wo isolation valves will be located upstream and downstream of the control valve. A flow meter will also be housed in the vault. The vault will be covered with locking double leaf hatch. The Santa Rita control valve vault will be controlled by a programmable logic controller (PLC), with data telemetered via 2.5 GHz spread-spectrum radio to the City of Pleasanton's Operations Control Center. The high radio frequency transmission system will require an approximately 20 to 25 foot high radio antenna located adjacent to the vault. Construction Scltectule The anticipated duration of construction activities for the proposed project is approximately 28 weeks with certain activities occurring concurrently. General durations of construction include: • start up activities, 11 weeks; • installation of the pipeline, 4 weeks; • installation of the Zone 7 turnout and City of Pleasanton vault, 2 weeks; • construction of the fluoridation building, 5 weeks; • installation of the Santa Rita control valve vault, 2 weeks; and • equipment testing and decommissioning, 4 weeks. Construction-Rekttett Activities Construction will follow the City of Pleasanton's Standard Specifications for materials and methods of construction for the City's public infrastnicture (City of Pleasanton 2002). These specifications address landscaping, construction near trees, traffic control, erosion and sedimentation control, good housekeeping practices including hazardous materials transport, storage and use, constriction hours and schedule, and procedures if archeological artifacts are encountered during construction. Installation of project facilities will require excavation, grading and backfilling. Approximately 150 cubic yards of material will be excavated to install the Zone 7 turnout, City of Pleasanton vault, fluoridation building and Santa Rita control valve vault. The pipeline will be installed under Pimlico and Brockton drives using traditional cut and cover construction methods. Approximately 1,800 to 3,600 cubic yards of material will be excavated and excess material hauled offsite and will not be stored along the pipeline construction route. Excess material will be disposed of at a suitable landfill site. Bedding and backfill material will be trucked to the construction site. The work space along Pimlico and Brockton drives will be about 30-feet wide and some traffic lane closures will be necessary, however, at least one lane will be remain open for traffic and a traffic control plan will be prepared and approved by the City of Pleasanton prior to construction. The typical crew size for pipeline installation will include 4 to 6 workers, 3 to 4 truck drivers and inspectors. Truck traffic generated by workers coming to and from the construction site daily will include 6 to 8 at the pipeline construction site, 6 to 8 at the Zone 7 turnout and Pleasanton City of Pleasanton 9 Wiorlcr & Kelly Draft Initial Study/Proposed Negative Dcclarahon August 2006 04263501