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J <br />IV. BACKGROUND: <br />On March 19, 1990, PHS-EHD conducted a complaint (190-392) <br />inspection alleging fumes from spent coffee grounds had <br />made workers ill. The grounds were found to be non- <br />hazardous, however, other hazardous waste streams were <br />identified and a generator inspection was conducted. At <br />that time, two violations were documented: 1) several <br />waste oil drums did nod have accumulation start dates, and <br />2) several drums had been stored in excess of 90 days. <br />In 1986, a sampling of Nestle wells detected <br />trichloroethylene (TCE) in the groundwater. The company <br />has been performing remedial activities, including carbon <br />absorption with oversight from the California Central <br />Valley Regional Water Quality Control Board. <br />V. GENERAL DESCRIPTION OF FACILITY: <br />The facility was purchased in 1929 and was originally <br />utilized for the production and processing of evaporated <br />milk. It was later converted to manufacturing soluble <br />instant coffee. In 1957, a decaffeination plant utilizing <br />TCE for extraction purposes was constructed. In 1970, <br />Nestle converted to a methylene chloride extraction <br />process. The methylene chloride process was operated until <br />April 1986. Nestle continues to manufacture regular <br />soluble instant coffee at this location. <br />Nestle employs 94 people and operates around the clock, <br />utilizing three shifts, five days per week. <br />VI. HAZARDOUS WASTE ACTIVITY DESCRIPTION: <br />A. Spent activated carbon with TCE: The largest quantity <br />of hazardous waste generated at this site is spent <br />activated carbon contaminated with TCE from the <br />groundwater treatment system. This material is <br />transported by Exceltrans and Dart trucking and shipped <br />to Envirotrol, Inc., 24th Street Extension and 31st <br />Street, Beaver Falls, PA, 15010, and Cameron Yakima, <br />Inc., 1414 S. 1st Street, Yakima, WA, 98907, <br />respectively, for recycling. <br />The spent activated carbon is generated in several <br />locations on and off site. The bulk of the treatment <br />system and carbon waste is located at the northwest <br />corner of the facility. There are several groundwater <br />extraction and treatment points which generate spent <br />3 <br />