SITE INFORMATION AND CORRESPONDENCE_CASE 2

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INFORMATION SHEET 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 This Order will be rescinded.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 industrial 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 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/1 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. The City established an acceptable pretreatment program in compliance with Special Order No. 80-097. The Order will be retained because six other communities or cities were named in the same Order. Special Order 81-076 will be rescinded because relaxation of total suspended matter to 30 mg/1 is incorporated into the City's new NPDES permit .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 down- stream from the discharge, reducing the anticipated usage of the river at this location.