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CENTRAL VALL^EGIONAL WATER QUALITY ONTROL BOARD INSPECTION REPORT 28 April 2000 DISCHARGER: Mokelumne River Fish Installation LOCATION & COUNTY: 23024 N. McIntire Road, Clements, San Joaquin County CONTACT(S): Mr. Richard Bryant, Fish Hatchery Manager II INSPECTION DATE: 12 April 2000 1330- 1530 hrs INSPECTED BY: Mr. Robert Fagemess ACCOMPANIED BY: Mr. Richard Bryant, Department of Fish and Game OBSERVATIONS AND COMMENTS: On 12 April 2000, 1 met with Mr. Richard Bryant,Fish Hatchery Manager II with the Department of Fish and Game. Mr. Bryant accompanied me during a 1A compliance inspection of the Mokelumne River Fish Installation (facility), located in eastern San Joaquin County. The inspection involved: reviewing the existing NPDES and Waste Discharge Requirements (WDR); review of the Discharger's self-monitoring reports (SMRs) for the months of July 1999 through February 2000; conducting a meeting with Discharger; inspecting the operations; and inspecting the receiving water. Samples of the influent, effluent and receiving water were also collected and analyzed to supplement my evaluation of permit compliance. GENERAL BACKGROUND: The facility is located roughly 15 miles east-northeast of the City of Lodi. The facility is owned by the East Bay Municipal Utilities District and is operated by the California Department of Fish and Game. NPDES permit No. CA0004791, Waste Discharge Requirement Order No. 97-116 was adopted by the Regional Board on 20 June 1997 and expires 01 June 2002. The facility traps adult fish, collects, incubates, and hatches fish eggs, and rears juvenile fish. The fish are reared for several months up to a year, depending on management strategy, and released into the lower Mokelumne River, the Sacramento-San Joaquin Delta,or San Pablo Bay. The Camanche Reservoir supplies the facility with water. Roughly 15 to 20 mgd of water makes a single pass through the facility. Influent water is passed through an aerator as needed to adjust its dissolved oxygen content appropriately. No other mechanical or chemical processes are used at the hatchery. The facility may use chemicals to control fish disease; however, has not done so since the adoption of the Order. Water is discharged through the fish ladder and a 24-inch diameter pipe located immediately downstream of the fish ladder.