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24 August 1995 <br /> AGE-NC Project No 95-0144 <br /> Page 6 of,8 <br /> ' 4 4 3 UNDERGROUND"STORAGE TANK NOS 3, 4, 5 & 6 <br /> TPH-g was detected in samples GP13-25, GP15-15, and GPI 5-25 at concentrations of 1 7 ppm, 7 7 <br /> Ippm and I 1 ppm, respectively,Benzene was detected in sample GP15-25 at a concentration of 0 030 <br /> ppm, ethylbenzene was detected in samples GP 15-20 and GP 15-25 at concentrations of 0 008 ppm <br /> and 0 12 ppm,respectively, and xylenes were detected in samples GP 13-25, GP 15-15, GP 15-20, and <br /> GP 15-25 at concentrations of 0 072 ppm, 0 013 ppm, 0 017 ppm and 0 023 ppm, respectively 4 <br /> I <br /> I Organic vapors were detected in boring GP 13 at depths of 20 and 25 feet and in boring GP 15 at <br /> depths of 15,'20 and 25 feet at concentrations up to 12 ppm No organic vapors were detected in <br /> boring GP 14 <br /> S <br /> ' Xylenes were detected in the ground water sample collected from GP 14 at a concentration of 1 0 <br /> t ppb` TPH-d, toluene and xylenes were detected in the ground water sample collected from GP16 at <br /> concentrations of 220 ppb, 0 97 ppb and 1 4 ppb, respectively TPH-g, TPH-d, TRPH, toluene and <br /> xylenes were detected in the ground water sample collected from GP 17 it concentrations of 220 ppb, <br /> 140 ppb, 1 5 ppb, 0 52 ppb and 0 61 ppb, respectively <br /> 4 4 4 UNDERGROUND STORAGE TANK NO 8 r <br /> INo volatile halocarbons were detected in samples from GPI to GP4 However, the repos ting limits <br /> were up to 6 times greater than normal in 5 of'the 8 samples analyzed due to matnx interference <br /> Organic vapors were detected with the PID in prob=ngs GP 1 and GP2 at concentrations up to 1,341 <br /> ppm Organic vapors were detected at a concentration of 1 ppm at a depth of 20 feet in probing GP3 <br /> Organic vapors were detected in probing GP4 at concentrations up to 90 ppm (GP4-25) Strong <br /> solvent odors were detected in samples from GPI and GP2 Slight solvent odors were detected in <br /> probnngs GP3 and GP4 <br /> ' No volatile halocarbons were detected in the ground water sample collected from robin GPI <br /> p probing <br /> 5.0. CONCLUSIONS & RECOMMENDATIONS <br /> 5 1 HYDROCARBON-IMPACTED GROUND WATER <br /> Petroleum hydrocarbons were not detected to the ground water sample fiom MW-8, indicating that <br /> ' impacted ground water has not migrated off-site to the north Petroleum hydrocarbons were not <br /> detected in the ground water sample from MW-2 and only low concentrations of ethylbenaene and <br /> I , <br />