SITE INFORMATION AND CORRESPONDENCE_FILE 1

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WASTE DISCHARGE REQUIREMENTS J.R. SIMPLOT COMPANY LATHROP, SAN JOAQUIN COUNTY -2- 8. Under terms of the Stipulation and Order (hereafter Order) approved by the Court 21 December 1982, California consented to the transfer from OCAP to Simplot of the Lathrop property and assets provided that OCAP expressly retains full responsibility for compliance with all obligations imposed by the Stipulation, and that Simplot assumes responsibility for the proper handling, storage, and disposal of liquid and solid wastes and storm water runoff in accordance with the Stipulation. 9. Simplot manufactures and formulates fertilizers and related chemicals and formulates (blending concentrated technical grade pesticides with inert ingredients) 150 to 200 different pesticides. 10. Simplot discharges .089 mgd (337,000 liters/day), on an annualized basis, of nonprocess waters (cooling water and boiler blowdown from the sulfuric acid plant and concentrator system, sewage treatment package plants, and rainwater runoff from the parking lots and closed ammonia plant area) to a 7.8 acre (3.2 ha) unlined percolation -evaporation pond; and 0.027 mgd (102,000 liters/ day) of rainwater runoff from the fertilizer manufacturing areas to two (2) 3.0 acre (1.2 ha) hypalon lined evaporation ponds. 11. Simplot stores up to 3 million gallons (11.4 x 106) liters annually of rain- water runoff and equipment rinsate from the Agricultural Chemical Department in storage tanks. This wastewater is transported to a Class I landfill for disposal. 12. Simplot discharges up to 2500 gpm (9500 liters/min) of process waters from the manufacture of fertilizer pellets to a 4.8 acre (1.9 ha) asphalt and sealant lined holding basin. The water is recycled for use in the fertilizer pellet manufacturing. 13. Simplot proposes to irrigate up to 150 acres (60.7 ha) of agricultural lands on Simplot property with the nonprocess waters from the unlined and hypalon lined ponds. 14. Simplot proposes to discharge approximately 2 gpm (7.6 liters/min) of demin- eralizer backwash water produced from a zeolite water softener to the lined ponds. 15. The discharges are in Section 35, T1S, R6E, MDB&M with surface water drainage generally in the direction of the San Joaquin River. 16. The beneficial uses of the San Joaquin River and the Delta are municipal, domestic, industrial and agricultural supply; recreation; navigation; and the preservation and enhancement of fish, wildlife and other aquatic resources. 17. The area sediments are composed of coarse and fine sands, silt, clay and some gravels. Useable ground water is at depths of 10 feet (3 meters) to approxi- mately 230 feet (70 meters).