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Mr. Ron Rowe Page 3 encountered in boring SB4 beneath the tank pit backfill and no groundwater was encountered. Field notes and boring logs are included in Attachment A. No subjective evidence of hydrocarbon odors or contamination was noted in soil or groundwater in any of the borings. Flame ionization detector (FID)readings were taken on soil samples from borings SBI through SB3 every five feet. All FID readings were 0 ppm, except for 1 ppm detected in the sample from boring S131 at approximately 25 feet. Sample it tin and Lab Tato Anal sis Soil samples collected at depths of 15, 24, and 28 feet from SBI; 15.5 and 20.5 feet from S132; 10.5, 15.5, and 20.5 feet from S133; and 14.5 feet from SB4 were submitted to Argon Laboratory (FLAP #1873) for analysis. Grab groundwater samples collected from borings S131 through SB3 were also submitted to Argon. Soil and groundwater samples were analyzed for TPHg using modified EPA method 8015 and BTEX and methyl tert-butyl ether (MTBE) using EPA method 8020. The groundwater sample and the soil sample collected at a depth of 24 feet bgs from SBI were also analyzed for oxygenate additives using EPA method 8260. The soil sample collected from SB4 beneath the former tank location at a depth of 14.5 feet bgs was additionally analyzed for lead using EPA method 6010. Results Soil and groundwater samples submitted for laboratory analysis did not contain detectable concentrations of TPHg, BTEX, or MTBE, except for 0.010 ppm total xylenes in SBI at 24 feet bgs. Additionally, oxygenates were not detected in the soil or groundwater samples selected for that analysis. The only other detectable analyte was lead at 5 ppm from SB4 at a depth of 14.5 feet bgs. Tables 1 and 2 summarize the analytical results for soil and groundwater, respectively. Laboratory reports are included in Attachment B. Discussion and Conclusions In 1992, the soil sample collected beneath the east end of the former UST at a depth of 15 feet bgs was reported to contain 3,300 ppm TPHg, 20 ppm ethylbenzene, and 210 total xylenes: During the current investigation, the sample collected from S134 at 14.5 feet bgs was the closest to the initial 1992 sample location. The laboratory results indicate that TPHg, BTEX, and MTBE are below detection limits in this 14.5-foot sample, although lead was detected at 5 ppm. SB4 could not be advanced through the tank pit backfill to collect deeper soil samples. However, soil samples collected from SBI, located 7 feet east of SB4, did not contain detectable wbmisubsurf.fpt