Laserfiche WebLink
20 October 2000 <br /> • AGE-NC Project No 95-0142 <br />' Page 3 of 4 <br /> Benzene was reported in samples collected from wells MW-6 and VW-1, VW-2, VW-3, and VW-4 <br />' at concentrations ranging from 0 71 µgll in VW-4 to 23,000 µg/l in VW-1 Toluene, ethylbenzene <br /> and xylenes were also detected in these same wells at concentrations as high as 38,000µg/l (toluene <br />' in VW-1) ' <br /> MTBE was detected in wells MW-5, MW-7 and VW-1 through VW-4 at concentrations of 5 0 µg11, <br /> 5 0 µg1,1, 780 4g11, 12 µg11, 85 µg11, and 14 µg11, respectively MTBE was the only fuel additive <br />' detected in the ground water samples this quarter <br /> The analytical results are summarized on Tables 2 and 3 The laboratory report (MAI Laboratory <br /> I D Nos 49858 through 49869), quality assurance and quality control (QA/QC)report and chain-of- <br /> custody form are included in Appendix B <br /> 4.0. CONCLUSIONS <br /> Based upon data collected from the site during the current and preceding ground water monitoring <br /> events, AGE concludes <br />' <br /> • Ground water flow direction appeared to be toward the south in the area defined by the <br /> shallow screened well network and toward the southeast in the area defined by the deeper <br />' screened well network <br /> • The highest concentration of dissolved petroleum hydrocarbons continues to be in the area <br /> the former location of TK1-90 UST TPH-g and BTE&X were not reported in samples <br />' collected from wells MW-4 and MW-5 which are located in the down-gradient direction <br /> However, low concentrations of MTBE have been reported in MW-5 <br />' 0 Significant concentrations of TPH-g and benzene were reported in samples from the deeper <br /> screened well MW-6 (screened 70 to 80 feet bsg) Presently, MW-6 is screened <br />' approximately 45 feet below the surface of first-encountered ground water One additional <br /> depth discrete well (MW-7) screened across the same depth and strata interval did not <br /> yielded significant hydrocarbon-impacted water sample during this sampling event, although <br />' low concentrations of MTBE were detected in both wells These wells are located in the <br /> apparent down gradient from well MW-6 <br /> 5.0. RECOMMENDATIONS <br /> ' Based upon the data collected to date, AGE recommends <br /> ' Implementation of the approved Corrective Action Plan <br />