Laserfiche WebLink
r <br />' 02 May 2003 <br /> • AGE-NC Project No 95-0142 <br /> Page 3 of 4 <br />' (wells MW-6, MW-7 and MW-8) was toward the southeast with an average hydraulic gradient of <br /> 0 004 foot/foot (unchanged) The elevation of the ground water table at the site is illustrated on <br /> Figure 3 <br /> 1 <br /> 32 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br />' TPH- was detected an samples collected from wells MW-6, VW-1, VW-3 and VW-4 at <br /> g p <br /> concentrations of 670 micrograms per liter (µg/1), 160,000µg/1, 3,800 µg/1, and 140 µg/1, <br />' respectively <br />' Benzene was reported in samples collected from wells VW-1 and VW-3 at concentrations of <br /> 26,000µg/1 and 560µg/1,respectively`Toluene,ethylbenzene and xylenes were detected an samples <br /> t MW-6, VW-1 and VW-3 at concentrations as high as 44,000 µg/1 toluene, 3,800 µg/1 ethylbenzene <br />' and 15,000 µg/1 xylenes, an sample VW-1 <br /> The fuel additive MTBE was detected an wells MW-5, MW-7 and VW-2 through VW-4 at <br />' concentrations ranging between 3 4 and 160 µg11 <br /> No other oxygenated fuel additive detected an the ground water samples this quarter The analytical <br />' results are summarized on Tables 2 and 3 The laboratory report (MAI Laboratory I D Nos <br /> 0303023-01 to 09),quality assurance and quality control(QA/QC)report and chain-of-custody form <br /> are included in Appendix C <br /> 1 , <br /> 4.0. CONCLUSIONS <br /> 1 , <br /> Based upon data collected from the site during the current and preceding ground water monitoring <br /> events, AGE concludes <br /> 1 0 Ground water flow direction appeared to be toward the northwest an the monitored zone <br /> defined by the shallow-screened well network and generally northeast and southeast at the <br />' intermediate and deep monitored zones, respectively <br /> • The highest concentration of dissolved petroleum hydrocarbons continues to be an the area <br />' of the former UST TK1-90 (well VW-1) TPH-g and BTEX concentrations have increased <br /> in water-table vapor well VW-3 up-gradient to cross-gradient of the former USTs, whale <br /> concentrations have declined to non-detect in the samples collected from vapor well VW-4 <br />' cross-gradient from the former UST area <br /> Advanced GeoEnvironmeatal,Inc <br /> 1 <br />