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Soluble Threshold Limit Concentration (STLC) are considered <br /> hazardous The STLC for zinc is 250 mg/1. <br /> On the June 3 , 1992 inspection conducted by Eleanor Ratliff, <br /> Robert Hu tley stated that no analysis had been performed to <br /> determine if the sand blast sand or grinding waste exhibit any <br /> hazardous ) characteristics. Up to this date, these waste <br /> streams w re managed as solid waste and disposed of at the <br /> municipal landfill. <br /> As of the June 3 , 1992 inspection, the sand blast waste and <br /> the grind ng room floor sweep has been containerized pending <br /> additiona analysis. Upon confirmation of the hazardous waste <br /> classific tion by An Lab, the containerized sand blast sand <br /> and the g inding waste is added at a 10% ratio to the filter <br /> cake hea metal waste generated by the pretreatment system, <br /> and manifested off site for recycling. <br /> Due to high cost associated with managing this identified <br /> waste stream, Stockton Plating, Inc. elected to change their <br /> procedure Jor bumper reconditioning. Badly damaged bumpers <br /> are no longer repaired for plating. Instead, these bumpers are <br /> sent to a metal recycler and new steel stamped bumpers are <br /> used. Fiv employees were laid off due to this reduction in <br /> labor int,:nsive production. Approximately one 55 gallon drum <br /> of grinding waste and sanding waste is currently generated at <br /> their respective production locations each quarter. <br /> Waste oil), paint/solvent waste, and various contaminated <br /> debris (wood planks, used plating tanks, plating tank liners, <br /> etc. ) mak up the majority of the secondary waste generated at <br /> the Stock on Plating plant. In 1992 , 14 tons of debris waste <br /> was manif sted for disposal. The waste was transported by Haz <br /> Control, I c. CAD000628149 and the designated facility is also <br /> listed aslHaz Control, Inc. , 731 Renz Lane, Gilroy, CA 95202 . <br /> Safety Kleen, 10625 Hickson St Unit A/C, E1 Monte, CA 91731 <br /> transportd and recycled 612 . 0 pounds of waste paint related <br /> material inn 1992 . Safety Kleen will also recycle the waste oil <br /> generatedby this facility in 1993 . In 1992, Stockton Plating <br /> contracte out any maintenance work that produced waste oil. <br /> The total hazardous waste manifested for recycling or disposal <br /> in 1992 wa,s 52 . 306 tons. <br /> VII. VIOLATIONS: <br /> 1. Sanding and grinding waste collected in the repair shop <br /> was held in open containers. <br /> 2 . Sanding and grinding waste collected in the repair shop <br /> was held in unlabeled containers. <br /> 4 <br />