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NARP.ATXVE <br /> V. DESCRIPTION OF MA30R WASTE STREAMS <br /> For each of the major waste streams identified in Section IV, information is <br /> provided below describing how the hazardous waste is generated. All hazardous <br /> waste generated at the facility is disposed or recycled off site. A flow diagram of <br /> each process generating a major waste stream is provided in Appendix A. <br /> A. CWC 214 — WASTE PAINT THINNER <br /> Waste paint thinner is routinely generated at the site. Paint thinner is <br /> used to clean painting equipment, such as spray guns, brushes, etc. Once <br /> the paint thinner is used, it is then put into 55-gallon containers and <br /> accumulated as a RCRA hazardous waste. <br /> B. CWC 221 — LUBE OIL <br /> Vehicles and equipment lube oils were stored on site. Over time, the oils <br /> were no longer usable and became retrograde materials. In 2002, the oils <br /> were characterized as a RCRA hazardous waste and were consolidated for <br /> off-site recycling. Although lube oil is used on site, it is not anticipated <br /> that this waste stream will be generated in the future because inventory <br /> controls will be put in place (refer to Section III). <br /> C. CWC 223 - OILY WATER <br /> Oily water is generated from the washing of vehicles and equipment. <br /> There are two wash systems generate the oily water: the bus wash and <br /> the steam pit. Both systems are connected to a 3-stage clarifier. The <br /> tanks in the clarifiers are cleaned approximately twice a year to remove <br /> the sludge. Pressurized water is used to suspend the sludge for removal <br /> and the oily water is transferred into a tanker truck for recycling. The bus <br /> wash is a closed system. The water is returned to the system following <br /> treatment by the clarifier. Water leaving the steam pit treatment system <br /> is discharged to the sanitary sewer after treatment by the clarifier. <br /> D. CWC 291 — LATEX PAINT <br /> Stockton Un f ed School District NETWORK ENVIRONMENTAL SYSTEMS,INC. <br /> Hazardous Waste Source Reduction Plan 12 <br />