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THE MARLEY COOLLNG XWER COMPANY ��1 ►i7 ��l Stockton, California MAR 19 )vdr) U FACT SHEEP Ya ENVIROMENTAL HEALTH March 14, 1986 PERMIT/SERVICES The Marley Cooling Tower Stockton Plant is located at 150 North Sinclair Avenue, Stockton, California. The Plant is divided into two areas designated the North and South Yards. The South Yard was purchased in 1942, and has been used as a wood storage and fabrication facility since that time. The North Yard was purchased in 1965 and has been used as a wood storage and pressure preservative treating plant since that time. The access to the site is limited by a fence around the perimeter and the entire area is paved. A stormwater retention pond was installed in 1966 to handle rainfall runoff in the North Yard. Wood treating by Marley began in the North Yard in the Fall, 1966. The process consists of placing the material to be treated in a long, pressurized cylinder (retort) , flooding the retort with waterborne chemicals, holding the pressure until adequate preservative is injected, draining the retort, and removing the material. The initial treating solution was chromated copper arsenate which was changed to acid copper chromate in 1982. Investigations by Marley, Department of Health Services, and the Water Quality Board in the early 1980's showed soil and groundwater at the site contaminated with treating chemicals. In December, 1984, the California Department of Health Services (DOHS) , the California Water Quality Control Board (the Water Board) , and The Marley Cooling Tower Company (Marley) reached a settlement agreement concerning the site. The agreement required certain interim corrective measures be taken by December, 1984. In addition, an investigative program to determine the extent of soil and groundwater contamination was required. Initial results of the soil investigation indicate contamination in the immediate area of the retort and contamination in the bottom of the storQwater retention pond. The initial results of the groundwater assessment investigation indicate concentrations of chromium in the immediate vicinity of the treatment plant, with rapidly de- creasing concentrations to the property line. Low level contamination is indi- cated at the property line. An off-site canvas and sampling of the existing wells was conducted. No conta- mination of any off-site well or water supply was found. At this time, there is no indication of any danger to the ccmnz7i ty surrounding the plant. A Commr ity Relations Plan has been developed and implemented to insure informa- tion is available to the public. Telephone contact has been made with elected officials, regulatory agencies, and concerned citizen groins. A repository of information, including the settlement agreement and site investigation plans, is available at the Stockton Public Library.