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Site Background Information: Stallworth Auto Sales Page 3 of 11 at concentrations as high as 6,100 mg/kg and 2,600 mg/kg, respectively. BTEX compounds were detected in boring MW-1 B soil samples at concentrations as high as 16 mg/kg, 220 mg/kg, 67 mg/kg and 360 mg/kg, respectively. Toluene was detected in the 25-foot soil sample collected from MW-2 at a concentration of 0.0085 mg/kg. • Fuel oxygenates were not detected in the soil samples analyzed. • After the installation and development of the five ground water monitoring wells on- site, each well was sampled. The ground water samples were analyzed for the suite of five fuel additives and, with the exception of MW-1 B, for TPH-g, TPH-d and BTEX. • TPH-g was detected in the ground water samples collected from monitoring wells MW-1A, MW-2 and MW-3 at a maximum concentration of 380,000 pg/I (MW-1A). TPH-d was detected in the groundwater sample collected from monitoring well MW- 1A at a concentration of 13,000 pg/I. The highest concentration of hydrocarbon- impacted ground water resides in the area of the former LISTs. • BTEX compounds were detected in the water samples analyzed from MW-1A, MW- 2 and MW-4 at concentrations as high as 3,000 pg/I, 100,000 pg/I, 6,500 pg/I and 32,000 pg/I, respectively. Fuel oxygenates were not detected in the ground water samples analyzed. On 20 November 2001, one soil boring (CPT-1) was 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 boring. A twin boring was then advanced to collect grab ground water samples from selected depths. • Ground water samples were collected from CPT-1 at the following intervals: 71 feet to 74 feet bsg, 104 feet to 106 feet bsg, 126 feet to 129 feet bsg and 145 feet to 148 feet bsg. • TPH-g was detected in all four water samples collected at concentrations of 16,000 micrograms per liter(pg/1), 500 pg/I, 460 pg/I and 140,000 pg/l, respectively. TPH-d was detected in three of the water samples collected at concentrations as high as 40,000 pg/I. • BTEX compounds were detected in all the water samples collected at concentrations as high as 560 pg/I benzene, 12,000 pg/I toluene, 3,000 pg/I ethylbenzene and 15,000 pg/I total xylenes. • DIPE was detected in the water sample collected from 126-129 feet bsg at a concentration of 1.4 pg/I. EDB was detected in the sample collected from 145-148 feet bsg, at a concentration of 86 pg/I. 1 ,2-DCA was detected in the water samples Advanced GeoEnviron mental,Inc.