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WASTE DISCHARGE REQUIREMENTS -3- <br /> SIMPSON LEE PAPER COMPANY <br /> RIPON MILL <br /> SAN JOAQUIN COUNTY <br /> 11. The ground water model looked at the semi-perched aquifer zone, the <br /> upper aquifer zone, and an intermediate aquifer zone. The semi-perched <br /> zone had an average TDS of 938 mg/1 ; the upper aquifer had an average <br /> TDS of 566 mg/l ; and the intermediate aquifer had an average TDS of 422 <br /> mg/l . Over a five-year period, the model predicts that TDS in the semi- <br /> perched zone will improve as a result of the lowered TDS in the plant <br /> discharge. A report discussing the effect of the discharge on TDS in <br /> the three water-bearing zones is due in 1998 and every five years <br /> thereafter. <br /> 12. Following extensive ground water modeling, the Discharger' s consultant <br /> David A. Lawrence, C.E.G. 618, stated in a letter, dated 21 September <br /> 1992, that Simpson's discharge at 1100 mg/l is not a designated waste <br /> and will not cause degradation of the waters of the State of California <br /> beyond ambient environmental conditions. The Discharger will continue <br /> ground water monitoring to confirm that its discharge is not impacting <br /> or degrading ground water. <br /> 13. The beneficial uses of the Stanislaus River and downstream waters are <br /> municipal , industrial , and agricultural supply; recreation; esthetic <br /> enjoyment; navigation; and preservation and enhancement of fish, <br /> wildlife and other aquatic resources. <br /> 14. The beneficial uses of the ground water are municipal , industrial , and <br /> agricultural supply. <br /> 15. The discharge from the Ripon Mill was governed by Waste Discharge <br /> Requirements Order No. 83-001 (NPDES Permit No. CA0004006) adopted by <br /> the Board on 28 January 1983; however, the NPDES permit expired on <br /> 1 February 1988. <br /> 16. The Board adopted a Water Quality Control Plan, Second Edition, for the <br /> Sacramento-San Joaquin Delta Basin (hereafter Basin Plan) , which <br /> contains water quality objectives for all waters of the Basin. These <br /> requirements implement the Basin Plan. <br /> 17. The action to update waste discharge requirements for this facility is <br /> exempt from the provisions of the California Environmental Quality Act <br /> (CEQA) in accordance with Title 14, California Code of Regulations <br /> (CCR) , Section 15301. <br /> 18. This discharge is exempt from the requirements of Title 23, CCR, Section <br /> 2510, et seq. (hereafter Chapter 15) . The exemption, pursuant to <br /> Section 2511(b) , is based on the following: <br /> a. The Board is issuing waste discharge requirements, and <br />