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WASTE DISCHARGE REQUIREMENTS -5- JOHNS-MANVILLE MANUFACTURING COMPANY, INCORPORATED FORMOSA PLASTICS, USA SAN JOAQUIN COUNTY 25. Beneficial uses of surface water are domestic, municipal, agricultural, and industrial supply; recreation; esthetic enjoyment; fresh water replenishment; and preservation and enhancement of fish, wildlife and other aquatic. resources. OPERATION AND DESIGN OF FACILITIES 26. The Discharger ceased A/C pipe production in July, 1987. The Discharger still produces PVC pipe at the facility, but the process is a completely closed system where all of the water is recycled and no process wastewater is generated. Currently, the 4y . water from an air compressor after-cooler and condensation water from the office air conditioning sxstem- are use in a sprinkler system periodically wets down the wast � to reduce the chance of asbestos articles becomin airborne. 27. While A/C pipe was being produced, the facility impounded the process wastewater from the A/C pipe slurrying process, the heat exchanger cooling water, and the boiler plant steam condensate. The impoundment facilities consist of two unlined settling and evaporation/percolation basins, approximately 1100 feet x 60 feet x 18 feet deep, constructed of earthen embankments. 29. The SWAT Rcpoit has drtctinincd that --ter and surfacr vraters havc been , 7 CEQA CONSIDERATIONS 31. The action to adopt WDRs for this facility is exempt from the provisions of the Califor- nia Environmental Quality Act Public Resources Code Section 21000, et seq.), in accordance with Title 14, CCR, Section 15301 for existing facilities.