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Site Background Information: Stallworth Auto Sales Page 5 of 11 120,000 pg/I in HU8 and HU9/10. TPH-d was detected in the water samples collected from CPT-3 and CPT-4 at concentrations ranging from 1,700 tag/I in HU4 to 80,000 tag/I in HU8. 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 tag/I benzene and 49,000 tag/I toluene in HU8, and 5,500 tag/l ethylbenzene and 25,500 tag/I total xylenes in HU9/10. BTEX constituents were not detected in the ground water samples collected from CPT-2. • 1,2-DCA was detected in the water samples collected only from CPT-3 at concentrations of 37 pg/I in HU8 and 23 tag/I in HU9/10. On 18, 19 and 20 January 2006, one soil boring was advanced and two deep ground water monitoring wells(MW-1 C and MW-1 D)were installed at the site.A CME-95 truck-mounted drill rig was utilized to advance soil borings B-4, MW-1 C and MW-1 D to total depths of 150 feet below surface grade (bsg), 135 feet bsg and 150 feet bsg, respectively, using 8-inch diameter hollow-stem augers. Soil samples were not collected in borings MW-1 C and MW- 1D. No soil samples were collected in boring B-4 until 50 feet bsg. In addition, ground water samples were collected from wells MW-1 C and MW-1 D. Pilot borings MW-1 C and MW-1 D were completed as ground water monitoring wells of the same designations using 2-inch diameter polyvinylchloride(PVC)casing with 0.010-inch slotted screen installed from 125 feet to 135 feet bsg and 140 to 150 feet bsg, respectively. • TPH-g was detected in the soil samples collected from B-4 at 60 feet, 70 feet, 90 feet, 100 feet, 130 feet and 149 feet bsg. Concentrations ranged from 2.0 mg/kg (134-100) to 2,500 mg/kg (134-70). • BTEX constituents were detected in the boring B4 samples from 60 feet, 80 feet, 90 feet, 130 feet and 149 feet. Maximum concentrations were detected in sample B4-70 at 4.7 mg/kg benzene, 32 mg/kg toluene, 7.9 mg/kg ethylbenzene and 45 mg/kg xylenes. • TPH-g was detected in the ground water samples collected from wells MW-1 C and MW-11D at concentrations of 3,800 micrograms per liter (Ng/1) and 6,400 pg/l, respectively. • BTEX constituents were detected in the samples from wells MW-1 C and MW-1 D with maximum concentrations in well MW-1 D at 170 fag/I benzene, 870 tag/1 toluene, 180 fag/I ethylbenzene, and 760 tag/I xylenes. • The fuel oxygenates MTBE and DIPE were detected in well MW-1 D at concentrations of 9.8 fag/I and 3.6 tag/1, respectively. DIPE was detected in well MW- 1 C at a concentration of 4.4 fag/l. The lead scavenger 1,2-DCA was detected in both Advanced GeoEnvironmental,Inc.