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Site Background Information: Larry's Auto <br /> AGE-NC Project No. 95-0184 <br /> Page 6 of 8 <br /> ANALYTICAL RESULTS OF GRAB GROUND WATER SAMPLES <br /> A total of twenty-nine grab ground water samples were collected and analyzed for the <br /> petroleum hydrocarbon constituents listed in Section 2.2.; the analytical results are listed <br /> according to the hydrogeologic unit in which the samples were collected (Table 2). <br /> HU2 <br /> TPH-g was detected in ground water samples CPT1-66 and CPT5-67 at concentrations <br /> of 84,000 micrograms per liter (Ng/1) and 3,900 pg/I, respectively. <br /> BTEX compounds were detected in samples CPT1-66 and CPT5-67 at the following <br /> respective concentrations: 6,600 pg/I and 1,800 pg/I benzene, 25,000 pg/I and 6.6 pg/I <br /> toluene, 2,400 pg/I and 72 pg/I ethylbenzene, and 18,200 pg/I and 52.6 pg/I total xylenes. <br /> The fuel additives DIPE,TAME,and 1,2-DCAwere detected. DIPE was detected in sample <br /> CPT-1-66 at a concentration of 2.3 pg/I. TAME was detected in samples CPT1-66 and <br /> CPT5-67 at concentrations of 65 pg/I and 120 pg/I, respectively. 1,2-DCA was detected in <br /> samples CPT1-66 and CPT5-67 at concentrations of 13 pg/I and 58 pg/I, respectively. <br /> HU3 <br /> Only one ground water sample (CPT5-108) was collected from the base of HU3. TPH-g <br /> was detected at 7,200 pg/I, BTEX compounds were detected at 980 Ng/I benzene, 560 pg/I <br /> toluene, 570 Ng/I ethylbenzene, and 1 ,530 pg/1 xylenes; the fuel additives DIPE, TAME, <br /> and 1,2-DCA were detected at concentrations of 3.8 pg/1, 76 pg/1, and 34 pg/I, respectively. <br /> HU4 <br /> TPH-g was detected in samples CPT1-117, CPT1-135, and CPT6-117 at concentrations <br /> of 450 pg/I, 5,800 pg/I, and 240 pg/I, respectively. BTEX compounds were detected in <br /> samples CPT1-117, CPT1-135, and CPT6-117 at maximum concentrations of 180 pg/I <br /> benzene, 690 pg/I toluene, 240 pg/I ethylbenzene, and 1,050 pg/I total xylenes, in the <br /> sample from CPT1-135. Fuel additives were not detected. <br /> HU5 <br /> Only one ground water sample (CPT7-138) was collected from HU5; petroleum <br /> hydrocarbons were not detected in this sample. <br /> Advanced GeoEnvironmenlal,Inc <br />