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INFORMATION SHEET <br /> THE MARLEY COOLING TOWER COMPANY <br /> STOCKTON, SAN JOAQUIN COUNTY <br /> The Marley Cooling Tower Company (MCTC) owns a wood treating facility for the <br /> purpose of fabricating cooling towers in the East Stockton area. The primary <br /> chemicals currently used in their wood treatment process are chromium and <br /> copper. In the past, arseinc was also used in the wood treatment solutions, <br /> but its use was discontinued in 1982. <br /> The site is divided into two areas, the North Yard and the South Yard. Present- <br /> ly, all rainfall runoff falling on the North Yard is collected in a stormwater <br /> pond. All wood treatment activities and storage of treated products are <br /> performed on the North Yard. Therefore, any rainfall runoff contacting treated <br /> products stored on the North Yard becomes contaminated with wood treatment <br /> chemicals and must be treated before it can be released. Therefore, MCTC <br /> proposes to remove the contaminants through the use of an ion exchange unit <br /> prior to discharge to the Stockton Diverting Canal. The discharge limits for <br /> arsenic, copper, and chromium are 0.05 mg/l , 0.05 mg/l for each constituent. <br /> The South Yard is used for fabrication of cooling tower components and storage <br /> of "clean" products. Therefore, runoff from this area is carried off-site by a <br /> storm drain system without containment or treatment. <br /> Allowing MCTC to discharge their stormwater off-site will enable them to drain <br /> the water presently in the pond and initiate the Cleanup of any contamination <br /> associated with the pond which is required under the Settlement Agreement signed <br /> by the Discharger, the Department of Health Services, and the Board. <br /> REF:ljl <br />