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Site Background Information Waterloo Food& Fuel AGE-NC Project No 99-0559 Page 5 of 11 • CPT-3 was sampled at 60 feet(HU2), 100 feet(HU4), 130 feet bsg(HU5U)and 150 feet bsg (HU5L) The CPT drill ng,equipped with 2-inch diameter hollow-stem rods fitted with a 1 25-Inch diameter piston soil sampling assembly loaded with a pre-cleaned brass sleeve, was used to collect soil samples from 80 feet bsg, 110 feet bsg and 135 feet bsg in the twin of boring CPT-2 The sample collected from 80 feet (CPT2-80 — HU3) contained TPH-g at 1,500 milligram per kilogram(mg/kg),BTEX compounds were detected in at concentrations as high as 210 mg/kg total xylene (benzene was at 25 mg/kg) MTBE was detected at a concentration of 820 micrograms per kilogram(µg/kg) The sample collected from 110 feet(CPT2-110—upper HU5)contained TPH-g at 4 9 mg/kg, BTEX compounds were detected in at concentrations as high as 0 53 mg/kg total toluene (benzene was at 0 18 mg/kg) MTBE was detected at a concentration of 30 gg/kg The sample collected from 135 feet (CPT2-135 —middle HU5) contained TPH-g at 2 4 mg/kg, BTEX compounds were detected in at concentrations as high as 0 51 mg/kg toluene(benzene was at 0 16 mg/kg) MTBE was detected at a concentration of 16 µg/kg • ANALYTICAL RESULTS OF GROUND WATER SAMPLES APRIL 2001 A total of eleven ground water samples were collected from HU1, HU2, HU4, Upper HU5 and Lower HU5 and submitted for laboratory analysis HU 1 Samples CPT1-60 and CPT3-60 were collected from HU1, the upper most occurrence of ground water from the CPTs TPH-g and BTEX compounds were not detected in samples However,the fuel additive MTBE was detected in CPT 1-60 and CPT3-60 at a maximum concentration of 17,000 µg/1 (CPT3-60) HU4 Samples CPT1-100,CPT 1-100 and CPT3-100 were collected from HU4,the most pronounced flow unit defined at the site TPH-g was detected in samples CPT 1-70 and CPT2-100 at concentrations of 6,700µg/1 and 710µg/1,respectively The BTEX compounds were detected in samples CPT 1-100 at concentrations of 1,100 µg/1,89µg/1,410 µg/1 and 900 4g/1,respectively The BTEX compounds were detected in samples CPT2-100 at concentrations of 100 µg/1, 120 µg/1, 10 µg/1 and 47 µg/1, respectively The fuel additive MTBE was detected in CPT1-100, CPT2-100 and CPT3-100 at a maximum concentration of 870 µg/1 (CPT3-100), Advanced GeoEnvironmental,Inc