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IV. BACKGROUND: The facility was first opened in 1986. The inspection performed on August 30, 1989 is the first inspection conducted by DHS or Public Health Services at the facility. Local hazardous waste generator fees were current at the site and the facility was categorized as a hazardous waste generator producing greater than 5 tons and less that 25 tons of hazardous waste per year. V. GENERAL DESCRIPTION OF FACILITY: E.R. Carpenter is located at 17100 Harlan Rd. , just south of Louise Ave. , and east of Interstate-5, in Lathrop, CA. The facility has operated since 1986. E.R. Carpenter produces a variety of foam products, including carpet padding and flotation devices. VI. HAZARDOUS WASTE ACTIVITY DESCRIPTION: Foam production of varying consistencies is performed in the S/W corner of the plant on one production line. The different products are manufactured by varying the chemical combinations at the start of the production line. No hazardous waste is generated in the manufacturing process. However, during the cleanup process methyl chloride is used to dissolve foam off of the sheet metal mixing box and the mixing nozzles, thereby producing a hazardous waste. A 5 gallon bucket of methyl chloride is poured over the mixing box twice daily. Each cleanup requires between 10 and 15 gallons of methyl chloride. Total hazardous waste generation for a year, operating 5 working days a week, would equal 7, 650 gallons or approximately 65, 000 lbs. [255 days x 15 gallons x 2 (twice daily) = 7 , 650 gallons] . The 1988 manifest information indicates 7, 450 gallons of hazardous waste was generated during this time frame. Additional hazardous waste noted at the facility was generated in the truck maintenance area. Six 55 gallon drums were found containing varying amounts of waste oil near the N/E corner of the site. Maintenance foreman, Ed Ware, indicated that the waste oil was picked up routinely by Refinery Services, a DHS permitted facility. Mr. Ware was unable to provide records at the time of the inspection for the amount of waste oil that had been transported. A new truck maintenance shop had just been completed which included an oil/sand separator and an aboveground waste oil tank. The aboveground tank will eliminate the use of waste oil drums. Mr. Water indicated at present the facility is generating approximately 400 gallons of waste oil per year.