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I <br /> 26 September 2003 <br /> AGE-NC Project No 95-0128 <br />' Page 6 of 8 <br />' and the newly added well MW-18 were deeper-screened wells and are currently drowned The depth <br /> to ground water and ground water elevation data is summanzed in Table 1 <br /> The areal ground water flow direction was inferred to be northeast at gradients ofbetween 0 003 ft/ft <br /> to 0 004 ftlft The previous cone of depression observed at the northeast corner of the site due to <br /> drawdown of the water table by extraction well EW-1 was absent (Figure 3) <br /> 3 3 ANALYTICAL RESULTS OF MONITORING WELL GROUND WATER SAMPLES <br /> TPH- was detected in ground water samples MW-4 MW-5 and VW-1 at concentrations of <br /> g i�' p <br /> 7,600 micrograms per liter(Ag/l),4,000 ggd,and 67,000µg11,respectively with a laboratory notation <br /> of sheen or product present In sample VW-1,TPH-d was detected in samples MW-4,MW-5,MW-7, <br /> MW-15, off-site, and VW-1 at concentrations of 2,600 µg/l, 1,300 µg/l, 140 gg/l, 86 µg/1 and <br /> 20,000 gg/l, respectively <br /> Various BTEX compounds were detected in samples MW-1 through MW-5 and VW-1,at maximum <br /> concentrations of 250 µg/1 benzene, 2,100 µg/1 ethylbenzene and 9,600 gg/l xylenes from sample <br /> lie MW-5 and 4,100 µg/I toluene from sample VW-1 <br /> MTBE was detected in ground water samples MW-2 through MW-6, MW-8, MW-11A, MW11B, <br /> MW 12A,MW-12B,MW-15 and VW-1 at concentrations ranging from 7 1 µg/l inMW-6 to 580 gg/l <br /> in MW-11A (see Figure 4) In addition, TBA was detected in well MW-6 at a concentration of <br /> 19 µg/l and 1,2-DCA was only detected in samples MW-2 and MW-3 at concentrations of 0 54 gg/I <br /> and 0 91 µg/1, respectively <br /> No other target analytes were detected in the samples analyzed The analytical results are <br /> summarized on Tables 2 and 3 The laboratory reports for the quarterly monitoring event (MAI <br /> Laboratory Work Order 0302377), quality assurance and quality control (QA/QC) reports and the <br /> chain-of custody form are included in Appendix D <br /> 3 4 ANALYTICAL RESULTS OF GROUND WATER TREATMENT SAMPLES <br /> TPH-g,TPH-d and MTBE were detected in the January influent sample at concentrations of 170µg/1 <br /> TPH-g, 360 gg/l TPH-d and 210 µg/1 MTBE <br /> TPH-g, BTEX and MTBE were detected in the February Influent sample at concentrations of <br /> 2,600 gg/l TPH-g, 270 µg/1 benzene, 21 pig/l toluene, 2 1 µg/l ethylbenzene, 290 µg/1 xylenes and <br /> . 290 gg/1 MTBE <br /> I <br /> Advanced GeoEnvironmental Inc <br />