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r 3 WASTE DISCHARGE REQUIRENL.6NTS CITY OF Iv1ANTECA AND CITY OF LATHROP ) ASTEWATER QUALITY CONTROL FACILITY SAN JOAQUIN COUNTY Limitation C.6 and Receiving Water Limitations E.9 and E.10 are included to achieve compliance with the Thermal Plan. 13. 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 pollutants discharged. The increase will not cause significant impacts on aquatic He, which is the beneficial use most likely affect6d by the pollutants discharged (BOD, suspended solids, chlorine residual, temperature, and metals). The increase will not cause a violation of water quality objectives. The increase in the discharge allows wastewater utility service necessary to accommodate housing and economic expansion in the Manteca area, and is considered to be a benefit to the people of the State. 14. The SWRCB, on 16 May 1974, adopted Resolution No. 74-43 titled "Water Quality Control Policy for Bays and Estuaries of California". This Policy is applicable to this discharge to the San Joaquin River, an estuarine water of the state 15. Effluent limitations, and toxic and pretreatment effluent standards established pursuant to Sections 208(b), 301, 302, 304, and 307 of the Clean Water Act (CWA) and amendments thereto are applicable to the discharge. 16. The discharge is presently governed by Waste Discharge Requirements Order No. 91-110 adopted by the Board on 29 May 1991. 17. The Discharger is required to establish a Pretreatment Program to enforce the requirements promulgated under Sections 307(b), (c), (d), and 402 (b) of the Clean Water Act. The discharger does not have an approved and implemented Pretreatment Program yet. The City submitted the Pretreatment Program to this office on May 8J992, but as of yet has not been approved. This permit contains a time schedule for implementation of a Pretreatment Program. 18. The action to renew an NPDES permit is exempt from the provisions of Chapter 3 of the California Environmental Quality Act(CEQA) (Public Resources Code Section 21100, et seq.), in accordance with Section 133 89 of the California Water Code. 19. The Board has notified the Discharger and interested agencies and persons of its intent to prescribe waste discharge requirements for this discharge and has provided them with an opportunity for a public hearing and an opportunity.to submit their written views and recommendations. 20. The Board, in a public meeting, heard and considered all comments pertaining to the discharge. 21. This Order shall serve as an INTPDES permit pursuant to Section 402 of the CW A, and amendments thereto, and shall take effect upon the date of hearing, provided EPA has no objections.