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i = I 24 January 1997 AGE-NC Project No 97-0288 Page 3 of 5 8015m/5030 and 8020/602 ' 4.0 FINDINGS 41 STRATIGRAPHY Silty fine to coarse sand was encountered from surface grade to approximately 12 feet bsg in each probing Clay was encountered from approximately 12 feet to total depth(12 5 feet) in probings B2 through B7 Boring logs are included in Appendix A Ground water "as encountered at a depth of approximately six feet bsg in each probing f ' 42 LABORATORY ANALYSIS OF SOIL AND,WATER SAMPLES Organic vapor was detected in sample B2-6 at a'concentration of 1 part per million volume (ppmv) Organic vapor was not detected in the remaining samples collected at the site A strong sheen was ' noted during collection of the water sample from probing B3 TPH-d was detected soil sample 132-6 at a concentration of 1,000 parts per million (ppm, reported ' in milligrams per-kilogram) TPH-d was detected in water samples from probings B3 and B4 at concentrations of 320,000 parts per billion (ppb, reported in micrograms per liter) and 22.,000 ppb, respectively MT BE and xylenes were detected in the water sample from B3 at concentrations of 95 Ippb and 66 ppb, respectively TPH-g was detected in the water sample from B4 at a concentration of 2,700 ppb However, the ' laboratory report noted that the hydrocarbons detected within the gasoline range yielded non- gasoline patterns Representatives of Castle indicated that the chromatograms resemble typical diesel ' patterns No other petroleum hydrocarbons were detected in samples collected from-at the site Analytical results of soil and grab water'samples are summarized in Table 1 I he laboratory report (Castle reference nos 990 and 991 } and chain-of-custody forms are included in Appendix B r 4 50. CONCLUSIONS AND RECOMMENDATIONS 1 S 1 CONCLUSIONS , ' Based upon data collected during the January 1997 preliminary assessment, AGE has the following f• conclusions 1