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INTRODUCTION This report summarizes the field activities performed at 25650 Highway 99 North in Acampo, California (Figure 1) during the recent removal of the underground storage tanks (UGSTs). Removal and excavation activities were performed by Golden West Builders of Livermore, California. Touchstone Developments (TD) was present on-site to observe the UGST removal and soil stockpiles. The soil sampling and analysis described m this report were performed August 25, 1993 to comply with the current Tri-Regional Water Quality Control Board Guidelines. SITE DESCRIPTION The site is occupied by a Chevron Service Station and is currently in operation. Two UGSTs were removed, one 550 gallon waste oil tank located north of the station building, and one 5 50 gallon heating oil tank located east of the building (Figure 1). FIELD EXCAVATION ACTIVITIES The two UGSTs were removed on August 25, 1993 UGST removal was witnessed by Enc W. Trevena, Senior Registered Environmental Health Specialist from San Joaquin County Public Health Services Environmental Health Division, and Greg Schroder, Deputy Fire Marshal from the San Joaquin County Fire Prevention Bureau. Also Present was Brett Hunter from Chevron U.S.A. The tanks were transported and disposed of at Erickson Inc., Richmond, Califor- nia. Transportation was performed, under manifest, by Erickson Inc.. Approxi- mately 40-5 0 cubic yards of material was removed and stockpiled on site during UGST removal and excavation. Both tanks appeared to be in good condition, no holes were observed in either tank. SOIL SAMPLING Soil samples were collected from the back hoe bucket by removing the top few inches of soil and pushing a clean, six-inch-long (two inches in diameter) brass sample tube into the soil until completely full. The ends of the tubes were covered with aluminum foil and sealed with plastic end caps. The samples were then labeled, placed in a cooler with ice, entered on a Chain-of Custody form and transported to Superior Precision Analytical, a State-certified laboratory, for analysis. Waste Oil Tank Sampling Soil sample WO-1-9' was collected between 2 and 3 feet beneath the fill end of the tank at approximately 9 feet below grade (Figure 2).