SITE INFORMATION AND CORRESPONDENCE 1980-1999

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WASTE DISCHARGE REQUIREMENTS CITY OF LODI WHITE SLOUGH WATER POLLUTION CONTROL PLANT SAN JOAQUIN COUNTY -2- 5. Unchlorinated domestic effluent is mixed with the industrial wastewater and used for reclamation when industrial flows do not meet agricultural needs, when wastewater does not meet discharge limits, or when dissolved oxygen in the receiving water is less than 5 mg/l and surface water discharges are prohibited. 6. The White Slough Water Pollution Control Plant has completed an expansion of its secondary domestic waste treatment capability to 8.5 mgd. However, studies completed to date have not conclusively shown that expanded flows to 8.5 mgd will not cause a violation of water quality standards. This Order does not allow flow increases beyond 7 mgd, until the Discharger completes a study, including monitoring, to show that the impacts will not be significant. 7. The Environmental Protection Agency (EPA) and the Board have classified this discharge as a major discharge. 8. The discharge is presently governed by Waste Discharge Requirements Order No. 86-041, adopted by the Board on 11 February 1986. WATER QUALITY CONTROL PLANS 9. The Board, on 31 March 1989, adopted a Water Quality Control Plan, Second Edition, for the Sacramento-San Joaquin Delta Basin (5B) which contains water quality objectives for all waters of the Basin. These requirements are consistent with that Plan. 10. The beneficial uses of Dredger Cut, and Delta waters downstream of the discharge are municipal and domestic, industrial , and agricultural supply; water contact and noncontact recreation; esthetic enjoyment; navigation; ground water recharge, fresh water replenishment; and preservation and enhancement of fish, wildlife and other aquatic resources. 11. The beneficial uses of the underlying ground water are municipal and domestic, industrial , and agricultural supply. 12. The permitted discharge is consistent with the antidegradation provisions of 40 CFR 131 . 12 and State Water Resources Control Board Resolution 68-16. This Order provides for an increase in the volume and mass of certain pollutants discharged. The increase has been limited to no more than 7.0 mgd pending completion of a study which proves the impact on water quality of a discharge of 8.5 mgd will either be localized or not significant. Allowing the small increase in the discharge to 7.0 mgd is not anticipated to have a significant impact on water quality, and will allow wastewater utility service necessary to accomodate economic expansion in the area. 13. Water quality objectives adopted pursuant to the Enclosed Bays and Estuaries Plan (EBEP) and the Inland Surface Waters Plan (ISWP) are applicable to the discharge. These requirements implement those Plans.