Laserfiche WebLink
05 October 2001 _ <br /> AGE-NC Project No 98=0521- <br /> r Page 3 of 4 - <br /> 3 1 -GROUND WATER ELEVATION, FLOW DIRECTION AND GRADIENT - <br /> LL- On 27 August 2001, the depth to ground water at the site ranged from 8 46 to 8 77 feet below the <br /> I ' tops of the well casings 'The ground water elevations at the site ranged from-8 14'feet to -8 44 feet <br /> mean,sea level (msl) The ground water flow was directed toward the northeast with a hydraulic <br /> ;gradient calculated to be 0 008 foot/foot Depth to water and groundwater elevation are summarized <br /> in Table 1 Figure_3 illustrates the contoured groundwater elevations <br /> ' = <br /> 32 ANALYTICAL RESULTS OF GROUND WATER SAMPLES - <br /> T The results of-the August 2001 monitoring event are as follows c <br /> --°- -g-• TPH-g was not detected in the samples collected from monitoring wells MW-1, MW-2 and <br /> BMW-3 TPH-g was detected in the sample collected from monitoring well MW-4 at a <br /> concentration 6f-2,500 micrograms per liter(µg11) <br /> - ! : BTEX compounds were detected in the sample collected from monitoring well MW-4 at <br /> concentrations of 400µg11 benzene, 82µg/l toluene, 120µg11 ethylbenzene and 500 µg/1 total <br /> xylenes;respectively Benzene was detected in the sample from monitoring well MW-2 at <br /> a concentration of 0 77 4g/1 BTEX compounds were not detected in the samples collected <br /> from monitoring wells MW-1 and MW-3 <br /> L • MTBE was detected by EPA Method 8020 in ground water samples MW-1, MW-2 and <br /> ' MW-4 at 44 4g/1,-560 µg/1 and 5.50 µg/l,respectively The MTBE results were confirmed by <br /> 3 `EPA method 8260 Modified at 45 p.g/l, 570 µg/1 and 440 µg/1, respectively No other fuel <br /> - - -�- oxygenates were detected in these samples <br /> '=Analytical results from the monitoring well ground water samples are summarized in Tables 2 and 3 <br /> ' = The laboratory report (MAI Lab IDs 76170 through 76173),QA/QC and chain-of-custody are <br /> _ included m Appendix B -- _ <br /> 4:0.T SUMMARY AND CONCLUSIONS <br /> The following conclusions were drawn from the results of this investigation <br /> --Ground water at the site was encountered at approximately 8 6 feet bsg The prevailing - <br /> ' A - ground water flow direction at the site is generally toward the northeast The ground water y <br /> __ _ Advanced GwEnvironmental,Inc <br />