Laserfiche WebLink
r23 Jul 1998 <br /> • y <br /> AGE-NC Project No. 95-0143 <br /> rPage 3 of 4 <br /> r drinking water standards were detected by EPA Method 8260 in samples collected during the May <br /> 1998 monitoring event (Table 3) <br /> r Petroleum hydrocarbons were not detected in the samples collected from MW-10,MW-14,MW-15, <br /> MW-16 or MW-17 Free product was not encountered in any of the wells on the site Analytical <br /> results of ground water samples are summarized on Tables 2 and 3 The laboratory report (MAI <br /> rLaboratory I D Nos 89069 - 89077) and chain-of-custody forms are included in Appendix B <br /> r4.0. SUMMARY/CONCLUSIONS <br /> rBased upon data collected from the site, AGE concludes <br /> • Average ground water elevation increased over two feet between February and May 1998 <br /> rThe inferred ground water flow direction remains towards the north to northeast at the site <br /> • Petroleum hydrocarbons were not detected in wells MW-10, MW-14, MW-15, MW-16 and <br /> rMW-17, defining the lateral extent of impacted ground water toward the south, east and <br /> • 1,2-DCA as detected in the sample collected from MW-14 during the May 1998 <br /> on g event The remaining analytes previously detected in MW-14 were not present <br /> dunng the current monitoring event <br /> r Free product was not encountered at the site during the May monitoring event However, <br /> ground water is above the screened interval in MW-3, which could prevent the detection of <br /> free product, if present <br /> r • Monitoring wells MW-3 and MW-9 are the most intensely impacted wells despite also <br /> having the thickest saturated zone above the well screens <br /> rBetween February and May 1998,petroleum hydrocarbon concentrations remained generally <br /> stable at the site In general, hydrocarbon concentrations have followed a fluctuating, poorly <br /> rdefined trend since quarterly monitoring began. <br /> r5.0. RECOMMENDATIONS <br /> Based upon data collected during the May 1998 and previous sampling events, AGE recommends <br /> r <br /> • A Remedial Action Work Plan (RAWP)has been submitted and approved by the PHS-EHD <br /> An cavitation for bid has been issued for the proposed RAWP Installation and operation of <br /> Advanctd GcoEmironmental,Inc <br /> r <br />