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'id `/ IV. BACKGROUND On March 2, 1988, Public Health Services signed a"Memorandum of Understanding" with the Department of Health Service, (DHS), now known as Cal EPA Department of Toxic Substances Control, (Cal EPA/DTSC), authorizing PHS-EHD to perform hazardous waste generator inspections in San Joaquin County. TOC had a spill of approximately 2500 gallons of fuel resulting from an overfill of their aboveground tank #7701 on September 1, 1983. The City of Stockton Fire Department responded to this incident. On January 9, 1987, soil samples were obtained in an excavation where two aboveground tanks were previously located. These samples were taken for assessment purposes for preparation of the area for the installation of a new aboveground tank. The samples confirmed soil contamination. Another "spill-type" incident occurred on April 29, 1988 when an 8" fire water line broke causing TOC's property to become flooded. This flooding occurred on the loading rack area that drains into a 4000 gallon sump used for spill containment. Subsequent flooding of the sump caused surface overflow of free product and mixed fuels (sump's contents) totalling approximately 250 gallons. Historically, this bulk terminal facility has been generating a portion of their hazardous waste via a wastewater recovery system designed to remove petroleum contamination from groundwater. This operation was discontinued in 1991 due to the fact that product was no longer being detected in the groundwater during the processing. On PHS-EHD's last inspection on March 29, 1990, it was observed that although approximately 73 tons of hazardous waste was generated and stored on site in aboveground tank #609, no hazardous waste was manifested in 1989. The waste, previously stored in aboveground tanks, has now been processed through an above ground oiltwater separator, and subsequently discharged under permit to the sanitary sewer. Currently, TOC is in the process of obtaining the necessary permit, via Permit by Rule, for their carbon filter-bed treatment system. The completed package is scheduled to be submitted to Cal EPA/DTSC by the new deadline, January 1, 1993. V. GENERAL DESCRIPTION OF FACILITY: TOC is located in the Port of Stockton at 3015 Navy Drive, and has been at this site since December 1948. The facility serves as a bulk loading terminal for tanker trucks transporting fuel. The terminal is a 24 hour operation and currently employs four full time employees.