Laserfiche WebLink
11 <br /> 21 March 2005 <br /> AGE-NC Project No 00-0764 <br /> Page 3 of 4 <br /> inferred to be toward the east at a gradient of approximately 0 004 foot/foot(ft/ft), as depicted on <br /> ' Figure 3 <br /> 32 LABORATORY RESULTS OF GROUND WATER SAMPLES <br /> TPH-g and xylenes were detected in ground water sample MW-3 at a concentration of <br /> 430 micrograms per liter(µg11)and 3 1 µg11,respectively 1,2-DCA was detected in sample MW-4 <br /> at a concentration of 2 8 µg/1 <br /> Laboratory results of the analyzed samples are summarized in Table 2 The laboratory report(CTEL <br /> Project No CT214-0412004), quality assurance and quality control (QA/QC)report, and chain of <br /> custody forms are included in Appendix C Documents confirming the upload of laboratory <br /> electronic deliverable format (EDF) files and depth to water measurements to GeoTracker are <br /> included in Appendix D <br /> 1 � <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> Based upon the results of this quarterly monitoring event, AGE concludes <br /> r • Ground water flow direction of first encountered ground water was inferred to be toward the <br /> east from the former UST location, at a gradient of approximately 0 004 ft/ft <br /> 1 • TPH-g and xylenes were detected in ground water sample MW-3 at a concentration of <br /> 430 micrograms per liter(µg/1)and 3 1 µg/1,respectively 1,2-DCA was detected in sample <br /> MW-4 at a concentration of 2 8 µg/1 The concentrations of these constituents in ground <br /> ' water are consistent with previous sampling events, indicating that the impacted ground <br /> water plume is stable <br /> • At the present time, the vertical extent of the dissolved hydrocarbons has been defined by <br /> ' boring B 1 and well MW-5 The lateral extent of the dissolved hydrocarbons has been defined <br /> by the shallow wells <br /> 1 <br /> ' 5.0. RECOMMENDATIONS <br /> Based on the results of this investigation, AGE recommends <br /> • Continued quarterly ground water monitoring, the next monitoring event is scheduled for <br /> February 20001/ <br /> ' / Advanced GeoEnvironmental,Inc <br />