SITE INFORMATION AND CORRESPONDENCE_FILE 1

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WASTE DISCHARGE REQUIREMENTS -4- J.R. SIMPLOT COMPANY LATHROP, SAN JOAQUIN COUNTY 2. The discharge shall not cause degradation of any water supply. 3. Nonprocess and process area rainwater runoff shall be properly segregated from each other. 4. Nonprocess waters used for irrigation from the hypalon and unlined ponds shall not contain pesticides or fertilizers above those concentrations commonly applied to the particular soils and the crops being grown. The irrigation waters and application methods must also meet applicable water reclamation criteria set forth in Title 22 of the California Administra- tive Code. 5. A freeboard not less than two feet (0.6 m) shall be maintained in storm - water and wastewater holding facilities. Simplot shall notify the Region- al Board when water levels exceed the minimum freeboard. 6. The site shall be graded to prevent ponding. Stormwater from fertilizer and related chemical handling areas shall be diverted to lined basins with a permeability of 10-6 cm/sec or less. Stormwater collection facilities shall be sized for the 24-hour, 100 -year or 7 -day, 20 -year storm, which- ever is greater; swales and other conveyances shall be impervious. 7. Storage of toxic or hazardous materials, other than in containers having a lining permeability of 10-8 cm/sec or less, is prohibited, and fluids contained therein should not penetrate halfway through the lining during the life of the container. 8. Tanks or similar containers for storage of hazardous materials shall be placed on impervious pads or be equipped with leak detection devices in the Agricultural Chemical Department area and bermed for containment of the total volume of the tank plus one foot (0.3 m) of freeboard. The areas shall be equipped with suitable warning systems in case of failure. 9. A cover material designed to prevent percolation of surface water shall be placed over all on-site ground surfaces in formulation, transfer, equip- ment cleaning, equipment or chemical storage areas, within the Agricul- tural Chemical Department area, except where more stringent controls are prescribed in these requirements. 10. Impervious liners and cover materials shall be designed so as to withstand the maximum anticipted loads. 11. Hazardous waste and materials, or any of their components shall not exist on the ground surface except as described herein. 12. All organic waste or spill -handling facilities shall meet State of Cali- fornia earthquake standard specifications for the Lathrop area.