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WASTE DISCHARGE REAREMENTS ORDER NO. 5-01-148 is -3- FOX VALLEY CORPORATION AND FOX RIVER PAPER COMPANY RIPON MILL SAN JOAQUIN COUNTY 11. Subsequent to the Regional Board's determination that the waste was designated, the Discharger has completed three projects in order to reduce effluent TDS: a. The Discharger has reduced the alum consumption by making changes in the manufacturing chemistry. This change has reduced the effluent TDS to 1400 mg/1. b. The cogeneration plant installed a brine concentrator to increase the concentration of the regeneration brine waste from the water softeners to 25 degree Baume. The concentrated solution is stored in a tank and trucked off-site for reuse as a brine solution by another company. c. The Discharger replaced its three existing water supply wells (Wells No. 1, 2, and 3), which were screened in the upper, intermediate and lower zones. These wells were replaced by five water supply wells (Wells No. 4, 5, 6, 7, and 8). The Discharger believes this will reduce the TDS in their wastewater to 1100 mg/l and eliminate the cross-contamination of salt into the deeper zones from the semi-perched zones. 12. ,The Regional Board finds that the sludge is aninert waste based on the results of sampling of the sludge material, underlying soil, and groundwater from shallow monitoring wells located near the inactive impoundment (RMT reports dated 28 October 1998, 17 September 19991 13 June 2000, and 29 September 2000). SURFACE AND GROUNDWATER CONDITIONS 13. The Water Quality Control Plan for the Sacramento and San Joaquin River Basins, Fourth Edition (hereafter Basin Plan), designates beneficial uses, establishes water quality objectives, and contains implementation plans and policies for all waters of the Basin. 14. Surface drainage is southerly in the Manteca Hydrologic Area(535.10) of the San Joaquin Valley Floor Hydrologic Unit. 15. The Ripon Mill is immediately adjacent to the Stanislaus River, which is the southern property boundary of the facility. The designated beneficial uses of the Stanislaus River, as specified in the Basin Plan, are municipal and domestic supply, agricultural supply, industrial service and process supply, water contact and non-contact water recreation, warm fresh water habitat,cold water aquatic species migration, aquatic habitat suitable for reproduction and early development of fish, wildlife habitat, and groundwater recharge. 16. The beneficial uses of the ground water are municipal, industrial, and agricultural supply.