Laserfiche WebLink
' 22 March 2005 <br /> . AGE-NC Project No 01-0815 <br /> Page 3 of 4 <br />' ethylbenzene and 199,000 µg/1 total xylenes in well MW-3 <br /> The fuel additives MTBE and TAME were detected in ground water samples collected from wells <br />' MW-1 through MW-3 at maximum concentrations of 70,000 µg/1 and 210 µg/1 in the samples from <br /> wells MW-1 and MW-2 No other analytes were detected at or above laboratory detection limits in <br /> the analyzed ground water samples <br /> The analytical results of the ground water samples collected on 14 February 2005 are summarized <br /> in Table 2 The laboratory report (CTEL Project No CT214-0502087), quality assurance/quality <br />' control (QA/QC) report, and chain of custody form are included in Appendix C Documents <br /> confirming the upload of laboratory electronic deliverable format (EDF) files and depth to water <br /> measurements to GeoTracker are included in Appendix D A plane view map depicting the <br /> concentrations of petroleum hydrocarbon contamination is illustrated on Figure 4 <br />' 4.0. SUMMARY AND CONCLUSIONS <br /> Based on the data collected from the site, AGE concludes <br /> ground ran <br /> s The ound water elevations ed from 18 98 feet to 20 11 feet below MSL Ground water <br /> g <br /> was inferred to be flowing toward the east to northeast, away from the former UST area, <br /> under a calculated gradient of 0 016 ft/ft <br /> • TPH-g,BTEX compounds,and the fuel additives MTBE and TAME were detected in ground <br /> water samples collected from wells MW-1 through MW-3 A sigmficant increase in the <br /> dissolved TPH-g and BTEX concentrations were detected in well MW-3 <br /> • Petroleum hydrocarbon impact to ground water is not defined in any direction <br /> 5.0. RECOMMENDATIONS <br /> Based on the findings of the environmental activities recounted in this report, AGE recommends <br /> • Continuation of the quarterly monitoring program The next monitoring event is scheduled <br /> for May 2005 <br /> • Preparation of an Interim Remediation Work Plan to contain the offsite migration of <br /> petroleum hydrocarbon-impacted ground water as directed in an EHD letter dated 11 March <br /> 2005 <br /> Advanced GeoEnvironmental,Inc <br />