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The "job shop" is located near the aluminum shop in the central north area of the facility. Custom parts are manufactured, repaired, cleaned, and prepared for plating. The "job hop" is a metal shop with lathes, drill presses, and all the necessary machinery required for metal working and parts manufacturing. VI. HAZARDOM WASTE ACTIVITY DESCRIPTION: The plating operation generates the majority of the manifested hazardous ) waste at this facility. To a lesser extent, hazardous waste is generated by grinding and sanding metal bumpers and parts; painting urethane bumpers; vehicle and machine maintenance; and facility maintenance, upgrade, and repair. The plati g operation generates a liquid waste stream which flows to n on site pretreatment system. The waste consists of rinse wat r, drag out, and cleaners. The waste streams are individua ly piped from the production departments directly to the pretr atment area. Two of the three waste streams, cyanide and chromium drag out, are piped through a separate four inch line into a cyanide sump and a chromium acid sump. The cleaners nd the heavy metals, copper and nickel, are piped through a six inch line into a heavy metal sump. This is the beginning of the pretreatment process. The wastes are recycled into usab e products or converted to a sludge which is pressed to form a �ilter cake. The waste water is treated and disposed of to th sanitary sewer system and the filter cake is manifested off site as hazardous waste to Encycle/Texas Inc. , 5500 Up River Road, Corpus Christy, Tx 78407 . The waste is transported by Greatwestern Chemical, CAD 981382443 . In 1992 , 38 tons of filter cake was manifested for recycling. The grinding and sanding of metal coated bumpers and other parts generates a metal contaminated dust or sandy waste. These waste streams were characterized as hazardous waste by An Lab, 1910 S Street, Sacramento, CA 95814 (report date - May 10, 1993) ,IPrior test results, prepared by Canonie Lab. , were submitted lby Robert Huntley on June 8, 1993 . These results also indicate that a sample obtained from the "Job Production" line on January 28, 1991 is above the Total Threshold Limit Concentra ion (TT C) for copper and zinc. Levels are reported at 7860 an 9490 mg/kg respectively. The TTLC values set in 22 CCR, Chapt r 11, Article 3 , Section 66261. 24 (a) (2) (A) Table II are 2 , 00 mg/kg for copper and 5, 000 mg/kg for zinc. In addition to the Canonie Lab. and An Lab results, Roy F. Weston Lab prepared a report dated July 13 , 1992 which indicates zinc at 3100 mg/kg. This sample was obtained from the "Job Production" polishing area and analyzed using the Waste Extraction Test (W.E.T. ) . Constituent levels above the 3