COMPLIANCE INFO_1990-1998 - Laserfiche WebLink

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R V V INFORMATION SHEET CITY OF TRACY WASTEWATER TREATMENT PLANT -2- additional limits not contained in this permit, and the requirement to perform additional biotoxicity monitoring. In addition, there are proposals to modify the flow regime in the Delta which may significantly alter the quantity and quality of water in Old River. The permit contains a provision that allows it to be reopened if flows on which effluent limits have been based are significantly altered. The permit contains a provision and time schedule to achieve compliance with the receiving water flow monitoring. Currently, no continuous receiving water flow monitoring device has been located at the effluent discharge point in Old River. The City of Tracy will need to assess the best way of measuring the flows in Old River. Sludge Management The City of Tracy has a Sludge Management Plan (March 1991) which describes the use of their dried sludge for agronomically applying it to land at an offsite farm. The actual offsite land application rates and procedures are regulated under separate waste discharge requirements issued by the Board. This permit requires annual testing of the dried sludge to indicate compliance with the maximum 40 CFR 503 constituent limit requirements for land application, although additional testing may be required by USEPA. A new Sludge Management Plan is also required to be prepared which discusses the site specific sludge management practices utilized at the Waste Water Treatment Plant. Pretreatment Program The City of Tracy has a Pretreatment Ordinance in place which establishes Local Limits for industrial users. In May 1992 the US EPA and Regional Board staff conducted an audit of the City's Pretreatment Program. The audit revealed numerous deficiencies in the pretreatment program including inadequate control mechanism, inadequate local ordinances, and non-technically based local limits. The Pretreatment Ordinance and local limits are in the process of being updated. This Order requires the updated ordinance and local limits to be approved by 15 February 1996 and to be implemented immediately for all new industrial users. Ground Water Monitoring Quarterly ground water monitoring will be required around the five industrial holding ponds. The industrial ponds are shallow unlined ponds that cover an area of approximately 53 acres. The holding ponds receive influent from the Tracy area industrial users. The industrial wastewater can have low pH, high TDS and/or high BODS concentrations.