21 ATTACHMENT 3 - Laserfiche WebLink

28 Facilities LAVWMA owns and operates storage, pumping and pipeline facilities for the disposal of wastewater effluent. The wastewater effluent is received from wastewater treatment plants which are owned by Livermore and DSRSD. LAVWMA receives treated wastewater from the Members and does not itself treat wastewater or own or operate any wastewater treatment facilities. Effluent is conveyed through LAVWMA’s 16-mile export pipeline (approximately 4 miles of force main and 12 miles of gravity interceptor) from LAVWMA’s export pump station located in Pleasanton to the EBDA pipeline in San Leandro where it is ultimately discharged into San Francisco Bay. The existing facilities of LAVWMA have a maximum flow capacity of 41.2 mgd PWWF. The LAVWMA system receives and transports treated wastewater from the DSRSD Wastewater Treatment Plant and the Livermore Water Reclamation Plant. LAVWMA’s storage and pumping facilities are located in Pleasanton. Treated wastewater is stored in three concrete- lined basins with a total capacity of 18 million gallons (“mg”). There is 21.9 mg of additional existing storage at the DSRSD Wastewater Treatment Plant and 11 mg at the Livermore Water Reclamation Plant. The LAVWMA pumping station has 10 vertical turbine pumps, and is designed for 9 pumps to operate simultaneously to convey up to 41.2 mgd to the EBDA pipeline, while the 10th pump is available as a standby. The existing force main section of the LAVWMA pipeline conveys wastewater from the pumping station in Pleasanton to the summit of Dublin Canyon Road in Dublin Canyon. The dual 36-inch-diameter force main piping constitutes the first 4-mile segment of the 16-mile export pipeline. The gravity pipeline extends for approximately 12 miles from the end of the force main through Dublin Canyon, Castro Valley, San Lorenzo and San Leandro and discharges into the EBDA interceptor pipeline, with final disposal in San Francisco Bay. Approximately 2,000 feet before the connection with the EBDA interceptor, LAVWMA has an emergency bypass pipeline that allows discharges to San Lorenzo Creek. The existing emergency bypass facilities have a NPDES permit limit of 21.5 mgd. LAVWMA is not a member of EBDA, but has a contractual agreement with EBDA for firm disposal capacity rights of 19.72 mgd and interruptible capacity of 21.48 mgd as the EBDA capacity allows, for a total right to discharge 41.2 mgd. See “- EBDA Agreement” above. In conjunction with this disposal capacity, LAVWMA has an NPDES permit for emergency discharge of up to 21.5 mgd of treated and dechlorinated effluent into San Lorenzo Creek during peak wet- weather conditions. See “- Permits and Regulations” below. Member Influent Limits The Joint Powers Agreement establishes limits for raw wastewater influent that may be treated by the Members’ treatment facilities. These limits total 31.8 mgd average dry weather flow (“ADWF”). Further, LAVWMA system capacity during peak wet weather is limited by the Joint Powers Agreement to 41.2 mgd. The raw wastewater ADWF influent limit is allocated as follows: Livermore 11.1 mgd; Pleasanton 10.3 mgd; and DSRSD 10.4 mgd. PWWF capacity is allocated as follows: Livermore 12.4 mgd; Pleasanton 14.4 mgd; and DSRSD 14.4 mgd. Two Members may transfer between them a portion of their influent allocation upon mutual agreement. The influent limit remains in place unless modified by unanimous agreement of the Members.