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Woodward-Clyde V spoon sampler attached to drill rods, was lowered through the center of the augers. The V sampling assembly was driven with a hydraulic hammer, with a force equal to a 140-pound hammer dropping 30-inches. The number of blows to drive the sampling assembly to the desired depth for each 6-inch interval was recorded in the boring logs. At each sampling interval, the sampler was opened and the brass liners were removed from the sampler. The bottom liner was prepared for chemical analysis by covering the ends of the liner with Teflon sheeting and plastic end caps. The liner was labeled with sample identification, date and time sampled, placed in a resealable plastic bag, then placed in an ice chest with ice until the samples could be transported to California Laboratory Services. The middle liner was used to measure headspace for VOCs and soil classification. The boring logs are provided V in Appendix B. The split spoon sampler was decontaminated between each sample drive with an Alconox detergent wash, double tap water rinse, and double deionized water rinse. Samples selected for chemical analysis were analyzed for TPH as gasoline and TPH as diesel using modified EPA Method 8015 and BTEX using EPA Method 8020. V Soil boring B-3A was drilled to a depth of 49.5 feet bgs located within the north end of the former UST excavation (Figure 4). Since the first 18 feet of B-3A was drilled through tank excavation backfill material and previous boring B-3 was sampled to 43 feet, no samples were collected from surface to 44 feet bgs. Soil samples were collected at 44.5 and 49.5 feet bgs. Soil samples selected for chemical analysis were collected from 45.5 to 46 and 50.5 to 51 feet bgs. No visible contamination, or elevated headspace readings were observed V during the advancement of B-3A. Boring B-3/B-3A was backfilled from 50 to 12 feet bgs with a neat cement plus bentonite grout mixture. The top of the boring is plugged with a plastic 5-gallon bucket for safety precautions. The general subsurface geology below the site consists of 1 to 3 feet of light brown firm clayey silt underlain by 3 to 6 feet of brown stiff sandy clayey silt, that is underlain by 2 to 5 feet of light yellowish brown clayey silt to clayey silty sand. The light yellowish brown clayey silt is underlain by 5 to 7 feet of dry brown sandy clay, that is underlain by 15 to 25 feet of interlayered light olive brown to light brown clayey silty sands, sandy clays, clayey V silts, and clayey sandy silts. The interlayered sequence is underlain by 8 to 10 feet of light brown firm clayey silt, that is underlain by a brown medium dense clayey silty sand with interlayers of a stiff light brown clayey silt. Groundwater was encountered in soil boring B-7 at a depth of approximately 76.5 feet bgs. Logs of the borings showing materials 4 8054/FEMA/XJAXPMR.R"/8-24-95 SAC 2-7 V