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ty TO: Daniel S. Welebir, R.S., MPH Director of Environmental Health FROM: Robert L. Hurd, R.S. Solid Waste Management Specialist RE: Background and Current Statlis of Landfill 39 -AA -010, C—alifornia Clay Products, 3200 S. El Dorado St., Stockton Prior to the keeping of Health District records and between the years 1910 and 1955, a brick factory was operated on the 21 -acre site by California Clay Products. A massive excavation was developed on the southeastern 10 acres of the site where clay for brick manufacture was removed to a base depth of approximately 20 feet. Upon cessation of brick -making operations, the clay quarry was made available for commercial disposal of Class III materials. Large volumes of concrete and building demolition from the downtown Stockton rehabilitation project were disposed at the site. District files relative to the site originated in 1973. It was at this time that three acres along the eastern edge of the original excavation were made available to Learner Company - a local automobile salvage and demolition firm. Learner Company disposed of its non-salvagable automobile demolition wastes con- sisting primarily of foam, rubber, and plastics. The California Regional Water Quality Control Board required geological and hydrological data to be submitted by California Clay Products for the purpose of drafting waste discharge requireme*nts for -the operation of a limited Class II disposal site. Affidavits were submitted by a California Clay Products employee and a local -well driller attesting to the impervious-.natur-e--o.f.-the-sail-and--the water table depth. Shortly thereafter, in May 1973, complaints were received from the Southern Pacific Railroad of 5 fires originating from the disposal site and threatening the railroad right-of-way immediately east of the site. One such fire was confirmed by the County Fire Warden on May 31, 1978. The Fire Warden indicated that the automobile shredding was contained significant quanti- ties of fine cotton, vinyl seat pieces, wires, rubber, metal, and aluminum mixed with oil. A concurrent inspection conducted by a representative of the Local Health District revealed numerous areas where wood, garbage, and household debris had beeniJd .. ,F� e d contrary to the a5reement with California ClayProd-Uc—ts. To prevent turtner tires Erom developing, a revised opi—rating, plan was submitted to CR14QCB which identified control measures to be (1) the spreading of wastes into layers less than three feet thick, (2) the providing of an intermediate soil cover at least six inches in depth, and (3) the covering of wastes at a minimum of once every 48 hours. This being acceptable and with the determination that (D