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4 03 June 2002 <br /> AGE-NC Project No. 97-0360 <br /> Page 5 of 7 <br /> 3.2. GROUND WATER GRADIENT.AND FLOW DIRECTION <br /> At the time of the February 2002 sampling event, depths to ground water in wells MW 1 through <br /> MW5 and EW1 ranged from 6.65 feet to 8.61 feet below the well heads. Ground water elevations <br /> r at the site ranged from 3.79 feet above mean sea level(MSL)in well MW2 to 4.44 feet above MSL <br /> in well EW 1 (Table 1). <br /> The ground water flow direction was inferred using ground water elevation data from the monitoring <br /> wells on-site. Well MW2 was not used in ground water flow direction or gradient determination <br /> =� because it is screened at a deeper interval than the other wells. The flow direction was inferred to be <br /> toward the west-southwest at a gradient of 0.003 feetifeet.Figure 3 illustrates the contoured ground <br /> water elevations as measured on 11 February 2002. <br /> 3.3. ANALYTICAL RESULTS OF SOIL SAMPLES <br /> A total of 11 soil samples were analyzed for TPH-g,TPH-d,BTEX,MTBE and seven fuel additives. <br /> j TPH-g was detected in the soil samples collected frozxl MW1, MW3, MW4, MW5 and EW1 at <br /> 10 feet bs at concentrations as hi as 160 milligrams per kilogram (mg/kg). TPH-d was detected <br /> g � � p �' ( fig) <br /> in the same samples,with the exception of EW I,at concentrations as high as 3,800 mg/kg.No other <br /> analytes were detected at or above laboratory reporting limits in the soil samples analyzed. The <br /> approximate extent of impacted soil is depicted on Figures 4 and 5. <br /> jAnalytical results of soil samples are summarized on Table 2.The laboratory reports(CTEL Lab I.D. <br /> Nos. 0202-002-1 through 0202-002-11), quality assurance and quality control(QA/QC)report and <br /> chain-of-custody forms are included in Appendix E. <br /> ';- 3.4. ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> TPH-g was detected in the ground water samples collected from all the wells sampled, with the <br /> exception of MW3 at concentrations as high as 380 micrograms per liter(µg/l). No other analytes <br /> - were detected at or above laboratory reporting limits in the ground water samples. <br /> The analytical results of ground water samples are summarized on Table 3. The laboratory reports <br /> (CTEL Lab I.D.Nos. 0202-050-1 through 0202-050-6), QA/QC report and chain-of-custody form <br /> are included in Appendix F. <br /> --rte <br /> Advanced GeoEnvironmental,Inc. <br /> L= <br />