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w r Site Background Information: Stallworth Auto Sales Page 4 of 9 1 ,2-DCA and EDB . No analytes were detected at or above laboratory reporting limits . • After the installation and development of the two ground water monitoring wells on-site, all on-site wells were sampled. The ground water samples were analyzed for TPH-g, TPH-d, BTEX, the five fuel additives, 1 ,2-DCA and EDB . • TPH-g was detected in the water samples collected from MW- IA and MW-6 at concentrations of 140,000 µg/1 and 1 ,600 µg/l, respectively, TPH-d was detected in water sample MW- lA at a concentration of 37,000 µg/l. • BTEX compounds were detected in the water samples collected from MW- IA and MW-6 at concentrations as high as 1 ,400 µg/lbenzene, 51 ,000 µg/1 toluene, 5 ,500 µg/1 ethylbenzene and 26,000 µg/I total xylenes, in sample MW- IA. • EDB was detected in the water sample collected from MW- 1 A at a concentration of 210 µg/1 . TBA was detected in water sample MW-6 at a concentration of 25 gg/l. In addition, the volatile organic compounds isopropylbenzene, n-propylbenzene, n-butylbenzene and napthalene were detected in water sample MW-6 at concentrations of 35 µg/1, 66 gg/l, 10 µg/1 and 7 .0 µg/1, respectively. • No other analytes were detected at or above laboratory reporting limits in the ground water samples . On 15, 16 and 17 June 2004, soil borings CPT-2, CPT-3 and CPT-4 were advanced on-site utilizing CPT technology to model the geological and hydrogeologic framework and to assess potential dissolved petroleum-migration pathways beneath the site. Lithologic data was collected from the initial borings. Twin borings were then advanced adjacent to the initial boring to collect grab ground water samples from selected depths. • Groundwater samples were collected from CPT-2 at 105 to 109 feetbsg, 127 to 131 feet bsg, and 172 to 176 feet bsg; ground water samples were collected from CPT-3 at 179 to 183 feet bsg, and 195 to 199 feet bsg; and from CPT-4 at 76 to 80 feet bsg, 143 to 147 feet bsg, and 189 feet and 193 feet bsg. • TPH-g was detected in all the ground water samples collected from CPT-3 and CPT4, at concentrations ranging from 5,900 micrograms per liter (µg/1) in HU4 to 120,000 µg/1 in HU8 and HU9/10. TPH-d was detected in the water samples collected from CPT-3 and CPT4 at concentrations ranging from 1 ,700 gg/l in HU4 to 80,000 gg/l in HUB . TPH-g and TPH-d were not detected in the ground water samples collected from CPT-2. • BTEX constituents were detected in all the ground water samples collected from CPT-3 and CPT-4 with maximum concentrations detected in the ground water samples from CPT-3 as high as 9,300 µg/I benzene and 49,000 µg/1 toluene in HUB, and 5,500 µg/1 ethylbenzene and 25,500 gg/l total xylenes in HU9/10. BTEX constituents were not detected in the ground Advanced GeoEnvironmenlal, Inc [.l