FIELD DOCUMENTS AND WORK PLANS 1987

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WASTE DISCHARGE REQUIREMENTS -2- THE MARLEY COOLING TOWER COMPANY STOCKTON, SAN JOAQUIN COUNTY (b) A covered treated wood storage facility has been erected and is in use. The Discharger plans to erect at least one more covered storage area for treated wood; and (c) Discontinued use of arsenic in the wood treatment solutions. 7. The Report of Waste Discharge describes the combined stormwater and ground water characteristics prior to treatment as follows: Average Flow: 0.278 million gallons per day (mgd) Design Flow : 0.370 million gallons per day (mgd) Average Temperature: storm water - ambient ground water - 68°F Constituent Stormwater (mg/1 ) Ground Water (mg/1 ) Total Chromium 5.0 20.0 Chromium VI 4.5 20.0 Copper 4.34 0.05 Arsenic 0.04 0.01 8. The Board, on 25 July 1975, adopted a Water Quality Control Plan for the Sacramento-San Joaquin Delta Basin (5B) , which contains water quality objectives for all waters of the Basin. These requirements are consistent with the Plan. 9. The beneficial uses of the Calaveras River are municipal , industrial , and agricultural supply; recreation; esthetic enjoyment; navigation; ground water recharge; fresh water replenishment; and preservation and enhancement of fish, wildlife and other aquatic resources. 10. Effluent limitation, and toxic and pretreatment effluent standards estab- lished pursuant to Sections 301, 302, 304, and 307 of the Clean Water Act and amendments thereto are applicable to the discharge. 11. The action to adopt an NPDES permit is exempt from the provisions of the California Environmental Quality Act (Public Resources Code Section 21000, et seq.) , in accordance with Section 13389 of the California Water Code. 12. 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 oppor- tunity to submit their written views and recommendations.