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i it A, M 22 May 2002 AGE-NC Project,No.01-0877 Page 3 of 9 limits in the soil samples analyzed.Analytical results of the samples collected beneath the USTs are presented on Table L r; j 2.3. PRELIMINARY SITE ASSESSMENT On 04 January 2002, four soil borings were advanced at the site to collect soil and ground water samples as described in the AGE-prepared Preliminary Site Assessment WorkPlan,dated24 October 2001. TPH-g, TPH-d and TPH-mo were detected in the soil samples collected from borings 131 l through B4 at concentrations ranging from 0.38 mg/kg to 8,100 mg/kg TPH-g, 400 mg/kg to 5,500 mg/kg TPH-d and 200 mg/kg to 9,200 mg/kg TPH-mo. Total recoverable petroleum hydrocarbons (TRPH) was detected in the soil samples collected from borings B 1 through B4 at l concentrations as high as 36,000 mg/kg(134-30). One or more BTEX compounds were detected in J the samples collected from borings B 1 through B4,with the exception of the 15-foot soil sample from B3, at concentrations as high as 45 mg/kg benzene, 630 mg/kg toluene, 150 mg/kg - I ethylbenzene and 760 mg/kg total xylenes (B4-30). Seven additional volatile organic compounds were detected in the soil samples at concentrations ranging from 0.010 mg/kg to 440 mg/kg. Fuel additives were not detected at or above laboratory reporting limits in the soil samples. TPH-g and TPH-d were detected in the ground water samples collected from borings B 1 through B4 at concentrations as high as 5,400,000 micrograms per liter(µg/1) and 390,000 µg/1,respectively. TPH-mu was detected in the ground water sample collected from boringB2 at a concentration of 12,000 µg/l. BTEX compounds were detected in the same samples at concentrations as high as 210,000 µg/1 benzene, 540,000 µg/t toluene, 630,000 µgd ethylbenzene and 3,820,000 µgd total xylenes (B3). Oil and grease was detected in the samples collected from Bl, B2 and B3 at concentrations as high as 1,500,000 µg/1(B3).BTEX compounds were detected in the groundwater J samples at concentrations as high as 8.5 µg/1 benzene, 150 µg/l toluene, 120 µg/l ethylbenzene and 1,300 µg/1 total xylenes. Seven additional volatile organic compounds were detected in the ground water samples at concentrations ranging from 2,100 µg/l to 2,000,000 µg/l.Fuel additives were not I� detected at or above laboratory reporting limits in the ground water samples. A cross-section depicting the general lithology and the concentrations of contaminants in the soil l beneath the site is illustrated on Figure 3; analytical results of soil and ground water samples are [ J summarized in Tables 2 and 3. To date,the vertical and lateral extent of impacted soil and ground _ water has not been defined. I �- Amore detailed description of the previous investigation at the site can be found in the AGE-prepared Preliminary Investigation and Evaluation Report(PIER), dated 20 March 2002. IJ I Advanced GcoEnvironmental,Inc. 1 i