Laserfiche WebLink
' 23 March 2005 <br /> • AGE-NC Project No 98-0497 <br /> Page 3 of 4 <br /> ' 3 2 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> The analytical results from the November 2004 ground water monitoring event are as follows <br /> ' • TPH-g was detected in well MW-1 at a concentration of 2,200 micrograms per liter(µg/l) <br /> The laboratory report noted that the detected concentration was mostly in the diesel range <br /> ' • TPH-d was detected in wells MW-1 and MW-4 at concentrations of 450,000 µg/1 and <br /> 17,000 µg/l, respectively <br /> ' • BTEX compounds and MTBE were not detected in the five groundwater samples analyzed <br /> ' Laboratory results of the water samples analyzed are summarized in Table 2 Copies of the <br /> laboratory report(CTEL Project No CT214-0411097), quality assurance/quality control (QA/QC) <br /> report, and chain of custody form are provided in Appendix B Documents confirming the upload <br /> ' of laboratory electronic deliverable format (EDF) files and depth to water measurements to <br /> GeoTracker are provided in Appendix C <br /> • 4.0. SUMMARY AND CONCLUSIONS <br /> t The findings of the November 2004 ground water monitoring event include the following <br /> Vol 2 jai <br /> • Ground water elevations at the site averaged approximately 43 P4 feet elow MSL, <br /> ' indicating an average increase of 102 feet since the last monitoring event in September 2004 <br /> • Ground water was inferred to be flowing radially outward from a southeast-trending ground j u <br /> water peak in the vicinity of well MW-1,under significant hydraulic gradients ranging from <br /> approximately 0 05 ft/ft to 0 12 R/ft <br /> • TPH-g and TPH-d were detected in well MW-1 at concentrations of 2,200µg/1 and <br /> 450,000 µg/1, respectively,however,the reported TPH-g concentrations were mostly in the <br /> TPH-d range In addition, TPH-d was detected for the first time in well MW-4, at a <br />' concentration of 17,000 µg/1 TPH-d concentrations increased significantly in the fourth <br /> quarter <br /> • The hydrocarbon-impacted ground water plume appears to be limited to the former UST area <br /> immediately surrounding well MW-1 The inferred areal extent of hydrocarbon-impacted <br /> ground water is illustrated on Figures 4 and 5 <br /> 1 <br /> • <br />' Advanced GeoEnvironmental,Inc <br />