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WASTE DISCHARGE REQUIREMENTS -5- JOHNS-MANVILLE MANUFACTURING, INCORPORATED JM A/C PIPE CORP. FORMOSA PLASTICS, USA SAN JOAQUIN COUNTY 24. Surface drainage is west-southwest to North Littlejohns Creek, tributary to French Camp Slough which flows into the San Joaquin River. 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, water from an air compressor after-cooler and condensation water from the office air conditioning system are use in a sprinkler system that periodically wets down the waste in the surface impoundments to reduce the chance of asbestos particles becoming airborne. Once the closure of the surface impoundments begins the sprinkler system will be removed. 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. CEQA CONSIDERATIONS 28. 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. OTHER LEGAL REFERENCES 29. The Discharger is required to submit a Corrective Action Plan (CAP) pursuant to Chapter 15, Article 5 requirements to address the contamination problem.