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WASTE DISCHARGE REQUIREMENTS -3- JOHNS-MANVILLE MANUFACTURING, INCORPORATED JM A/C PIPE CORP. FORMOSA PLASTICS, USA SAN JOAQUIN COUNTY 12. In Phase I, the drainage from the capped landfill areas is directed through either small channels or swales to the main channel where the runoff will be discharged. In Phase II, the drainage from the landfill areas will be collected and routed through sedimentation basins to reduce the amount of asbestos in the water discharged to the main drainage channel. In Phase III, the portion of the main drainage channel that runs through the site would be replaced by a stormwater pipe. The pipe would isolate the stormwater flows from contaminated sediments that may be present in the channel. 13. If sediments downstream from the site discharge point exceed the water quality goal, then remediation of downstream sediments may be required. The Discharger may decide to forgo the phased approach, and instead proceed directly to install a stormwater pipe to replace the channel. WASTES AND THEIR CLASSIFICATION 14. The Discharger has discharged wastes containing an average of 7.8% friable asbestos for disposal in surface impoundments and in landfills. These wastes are classified as "hazardous" under Title 22 of CCR. However, because these wastes do not pose a threat to ground water quality, Section 25143.7 of the Health and Safety Code permits their disposal in any landfill which has WDRs that specifically permit the discharge, provided that the wastes are handled and disposed of in accordance with other applicable state and federal statutes and regulations. 15. The surface impoundments accepted approximately 8000 cu. yds. of waste containing asbestos per year. When nearly full, the impoundments were dredged, and the material placed in one of the landfills. This occurred about every 2 years. The landfills contain the following approximate amounts of material: Landfill Volume of waste A 125,000 cu. yds. B 47,000 cu. yds. C 47,000 cu. yds. D 23,000 cu. yds. E F 24,000 cu. yds. G 36,000 cu. yds. H 22,000 cu. yds. I 27,000 cu. yds. J 55,000 cu. yds. K 77,000 cu. yds. L * sections E and L overlap and no determination of each one's capacity has been made. Together they contain approximately 38,000 cu. yds. of waste.