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Site Background Information : Stallworth Auto Sales Page 5 of 11 • TPH-g was detected in all the ground water samples collected from CPT-3 and CPT-4, at concentrations ranging from 5 ,900 micrograms per liter (pg/1) in HU4 to 120,000 pg/1 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 µg/l in HU4 to 80,000 pg/l 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 pg/I benzene and 49 , 000 pg/I toluene in HUB , and 5 , 500 pg/I ethylbenzene and 25 , 500 pg/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 lag/I in HU8 and 23 lag/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- 1 D . No soil samples were collected in boring B-4 until 50 feet bsg . In addition , ground water samples were collected from wells MW- 1C and MW- 1 D . Pilot borings MW-1C 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 (B4-70). • 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 134-70 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- 11) at concentrations of 3 ,800 micrograms per liter (pg/1 ) and 6 ,400 lag/I , respectively. • BTEX constituents were detected in the samples from wells MW- 1C and MW- 1D with maximum concentrations in well MW- 1 D at 170 lag/I benzene , 870 lag/I toluene , 180 pg/I ethylbenzene , and 760 pg/I xylenes . • The fuel oxygenates MTBE and DIPE were detected in well MW- 11D at concentrations of 9 .8 pg/I and 3 .6 pg/I , respectively. DIPE was detected in well MW- Advanced GeoEnvironmental, Inc.