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10 February 1998 <br /> AGE-NC Project No 95-0144 <br /> Page 3 of 5 <br /> ' 3 2 ANALYTICAL RESULTS OF SOIL AND WATER SAMPLES <br /> Organic vapor was detected in all soil samples collected from probing GP35 at concentrations <br /> ranging from 2 to 428 parts per million(ppm) Organic vapor was detected in GP36 only at a depth <br /> of 30 feet bsg with a concentration of 125 ppm Organic vapor was detected in probing GP37 <br /> between 20 and 60 feet bsg at concentrations as high as 240 ppm <br /> TPH-g and TPH-d were detected in soil samples from probing GP35 at depths of 20 and 25 feet bsg <br /> at concentrations as high as 16,000 parts per million (ppm, reported as milligrams per kilogram) <br /> ' Only ethylbenzene and xylenes were detected in sample GP35-40 at concentrations of 0 007 ppm <br /> and 0 022 ppm,respectively TPH-g and TPH-d were detected in sample GP36-30 at concentrations <br /> of 9 6 ppm and 44 ppm, respectively Petroleum hydrocarbons were not detected in soil samples <br /> from probing GP36 at depths of 20 or 35 feet bsg TPH-g and TPH-d were detecxed in sample GP37- <br /> 35 at concentrations of 890 ppm and 870 ppm,respectively and in sample GP37-50 at concentrations <br /> of 76 ppm and 33 ppm,respectively TPH-g was detected in sample GP37-60 at a concentration of <br /> 2 7 ppm Benzene was detected in three of the eleven soil samples analyzed at concentrations as high <br /> as 4 9 ppm MTBE was not detected in soil samples analyzed from the site <br /> ' • TPH-g and TPH-d were detected in the water sample collected from a depth of 20 feet bsg in GP35 <br /> at concentrations of 51,000 parts per billion (ppb, reported as micrograms per liter) and 1,300,000 <br /> ppb, respectively and in the water sample collected from a depth of 45 1'eet bsg in GP35 at <br /> concentrations of 640 ppb and 4,700 ppb, respectively TPH-g and TPH-d were detected in the water <br /> sample collected from probing GP37 at concentrations of 1,600 ppb and 950 ppb, respectively <br /> BTE&X were detected at concentrations ranging from 1 0 ppb (benzene, GP35 at 45 feet) to 3,400 <br /> (toluene, GP35 at 20 feet) MTBE was not detected in water samples collected <br /> ' Lower concentrations of BTE&X were detected in all soil and water samples analyzed using EPA <br /> Method 8260 The laboratory report notes that this discrepancy is presumably due to the less certain <br /> compound identification/resolution inherent in EPA Method 8020 or due to sample inhomogeneity <br /> Tertiary butanol was detected'in the water sample collected from probing GP37 at a concentration <br /> of 15 ppb Oxygenating compounds were not detected in the remaining water or soil samples <br /> ' analyzed from the site Ten additional constituents were detected at the site by EPA Method 8260 <br /> Analytical results are summarized on Tables 1 and 2 The laboratory report (MAI sample Nos <br /> 83788-83801) and chain-of-custody forms are included in Appendix B <br /> 4 0. DISCUSSION AND CONCLUSIONS <br /> Based upon data collected from the site, AGE concludes the following <br /> ' Advanced GcoEnvironmentai,Inc <br />