SITE INFORMATION AND CORRESPONDENCE_CASE 2

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.. INFORMATION SHEET y CITY OF TRACY SAN JOAQUIN COUNTY The City of Tracy is governed under Board Order No. 77-182, NPDES No. CA0079154, adopted 24 June 1977 after their new treatment facility was built. This Order will be rescinded. The Board adopted Cease and Desist Order No. 78-52 on 28 April 1978 for numerous effluent violations and industrial pretreatment inadequacies. A time schedule was adopted to require plans to be developed by which the City could correct its operational problems. Also, a wet industry ban was imposed prohibiting additional industri+il connections to the City's sewerage system. The Board adopted Cease and Desist Order No. 79-54 on 23 February 1979 to update the time schedule and to require plans developed in the first C&D be implemented through a grant funded construction project. Interim 30-day Biochemical Oxygen Demand (BOD) and Total Suspended Matter (TSM) effluent limits of 35 mg/l each were allowed until plant improvements were completed by the full compliance deadline. The Board adopted Cease and Desist Order No. 79-123 on 25 May 1979 to allow a limited wet industry connection. The additional flow was not expected to impact effluent quality because some treatment plant operational improvements had been made since the first C&D was imposed. The Board adopted Special Order No. 80-097 on 25 July 1980 to amend Board Order No. 77-182 to require compliance with federal pretreatment standards in accordance with a specified time schedule. Full compliance with an approved pretreatment program was required by 1 July 1983. The Board adopted Special Order No. 81-076 on 26 June 1981 to modify Cease and Desist Order No. 78-52 and Board Order No. 77-182 to allow the 30-day average TSM limit to be relaxed from 20 mg/l to 30 mg/l due to a change in the Department of Parks and Recreation ' s plans to build a riverside park downstream from the dis- charge. A review of self monitoring reports submitted by the City indicates the basis for the Cease and Desist Orders ( C&Ds) still exist ( i .e . , the City violates or threatens to violate effluent limits for daily maximum total coliform and chlorine residual ) . The three C&Ds will be retained. Because the City established an acceptable pretreatment program, Special Order 80-097 will be rescinded. Special Order 81-076 will be rescinded because relaxa- tion of total suspended matter to 30 mg/l is incorporated into the City's new NPDES permit . Total suspended matter was relaxed due to a change in the Department of Parks and Recreation 's plans to build a riverside park downstream I: from the discharge, reducing the anticipated usage of the river at this location. The City is proceeding with a $4.7 million "fix up" grant to eliminate solids handling problems which were a significant source of effluent violations when the first C&D was adopted. They are also using local funds to expand plant capacity from 5.5 to 9.0 mgd. Fix up and plant expansion are proceeding together and are scheduled for completion in 1987. Low D:cab