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1 <br /> 1 <br /> 1 <br /> 15 May 2004 , <br /> AGE-NC Prod ect No 01-0815 <br /> Page 6 of 8 <br /> V <br />' Benzene, toluene, ethylbenzene and total xylenes were detected in soil samples collected from <br /> borings MW3 and B1 at maximum concentrations of 17 mg/kg (131-35), 2 9 mg/kg (B1-35), <br /> 0 82 mg/kg (MW3-30) and 5 1 mg/kg (MW3-30), respectively <br /> MTBE was detected in soil samples collected from borings MW 1 through MW3 and B1 at <br /> maximum concentrations of 35 mg/kg in sample B1-35 by EPA method 8260 TAME was detected <br /> in'a soil sample collected from boring B1-35 at a concentration of 0 22 mg/kg <br /> No additional analytes were detected at or above Iaboratory detection limits in the samples analyzed <br />' Analytical results of soil samples are summarized on Table 1 The laboratory reports(CTEL Project <br /> No CT214-0403162), quality assurance and quality control (QA/QC) report and chain-of-custody <br /> forms are Included In Appendix F A plane view map showing the maximum extent of adsorbed <br />' petroleum hydrocarbon contamination is Included in Figure 5 Cross sectional views showing the <br /> extent of adsorbed petroleum hydrocarbon contamination are Included in Figures 6 and 7 <br /> 3 3 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> lie At the time of the March 2004 sampling event, depths to ground water ranged from 29 39 (MW-2) <br /> feet to 30 11 (MW-3) feet below the tops of the well casings Ground water elevation at the site <br />' averaged approximately 18 71 feet below mean sea level (MSL)(Table 3) During this monitoring <br /> event,the ground water levels in the wells were at least 4 39 feet below the tops of the well screens, <br /> indicating that the wells are screened properly to yield representative shallow ground water samples <br /> Ground water flow was inferred to be flowing towards the southeast with an average hydraulic <br /> gradient of 0 004 feet/feet Figure 9 Illustrates the contoured ground water elevations as measured <br />' on 30 March 2004 <br />' 3 4 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> TPH-g was detected in ground water samples collected from wells MW 1 through MW3 at a <br />' maximum concentration of 14,000 micrograms per liter (µg/1) in samples from well MW 1 <br /> BTEX compounds were detected in ground water samples collected from wells MW 1 through MW3 <br />' at maximum concentrations of 950 µg/1 benzene (MW1), 300 µg/1 toluene (MWI), 90 µg/1 <br /> ethylbenzene (MW 1) and 1,310 gg/1 total xylenes (MW3), respectively <br /> i <br /> Advanced GeoEnvironmental,Inc <br />