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stockpile were located adjacent to the conveyor terminus at the southern end of Area III. The remaining copper concentrate formed a small, 5-foot diameter pile approximately 4 feet high. Water from recent rains had filled tire track depressions and glistened with a blue-green tint on the bottom. There were also six empty, rusted, 55-gallon drums in this area. Several diesel tanks and approximately 50 55-gallon drums were observed in the center of Area III along a dirt road east of the rotary railcar dumper. The drums were observed to be empty and were stored upright on wooden platforms. Those that were labelled indicated that they previously contained Universal Torque fluid hydraulic oil. One barrel evidently in use was perched on a table with a spigot attached. The ground beneath the spigot was stained. A fence parallels the railroad tracks and forms the northern boundary of the parcel. Along the fence were old pipes, wood, rubber pylons, and various equipment. A small building constructed of cinder blocks and a trailer were located near the conveyors. PG&E transformer #T6156 was adjacent to these structures. No information was available to ascertain if the transformer contains polychlorinated biphenyl (PCB) type coolant oil. 5.3 SITE VICINITY The area surrounding the site includes general warehousing and industrial facilities on land owned by the Port of Stockton and leased to various tenants. Directly across West Washington Street from the site is a storage facility operated by Atlantic Richfield Oil Company which contains at least four large storage tanks. Other liquid bulk cargo storage facilities located along Navy Drive within 1/2 -mile of the site include: Stockton Petroleum, Transnitro, Tesoro Refining, Marketing, and Supply Company, Time Oil Company, Signal Oil and Gas Company, Southern Pacific Pipelines Company, Union Pacific Railroad Company, ST Services, and Unocal Corporation. Learner Company has operated a metal scrapyard facility at the intersection of Stork Road and Navy Drive. To the southeast of the site across West Washington Street is a 44-megawatt coal-fired cogeneration plant owned and operated by Energy Factors. A conveyor system located immediately east of the site provides a conduit from the coal stockpile on the north of the railroad tracks to the energy PSA04.007 9