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i 1 ti �4 08 August 2005 • AGE-NC Project No 98-0534 ' Page 9 of 15 ' summanzed in Table 3, analytical results of ground water samples are summarized In Table 4 Results of the January 2003 ground water monitoring event were reported in Quarterly Report- 1st Quarter 2003, dated 15 March 2003, prepared by AGE • 03 March 2003-a representative of AGE performed a reconnaissance of visually observable potential receptors within a 2,000-foot radius of the above referenced site Water wells or other observable potential receptors were located during the reconnaissance Results of the March 2003 investigation are presented in Appendix B • 31 October 2003-ground water levels measured at MW-1 through MW-8 averaged 12 5 feet ' below the tops of the well casings(within the screened interval), ground water was inferred to be flowing to the southwest across the former UST area to 0 002 ft/ft The ground water ' elevation of monitoring well MW-4 appeared anomalously low, out of the range of the surrounding wells by 1 foot and therefore the data from that well was not used to map the ground water elevation TPH-d was not detected in the ground water samples collected from ' the wells TPH-g was detected in the ground water samples collected from wells MW-4 and MW-6 at concentrations of 90 µg11 and 120 µg/1, respectively BTEX compounds were not detected in the ground water samples MTBE was detected by EPA Method 8260 in the 1 samples from wells MW-4 and MW-6 at concentrations of 10µg/1 and 72 µg/1,respectively No other fuel oxygenates were detected in any of the samples Ground water elevations are ' summarized in Table 3, analytical results of ground water samples are summarized in Table 4 Results of the October 2003 ground water monitoring event were reported in Quarterly Report- 4" Quarter 2003, dated 29 January 2004, prepared by AGE ' 06 February 2004 - ground water levels measured at MW-1 through MW-6 and MW-8 averaged 9 33 feet below the tops of the well casings (near the screened interval) Ground water was Inferred to be flowing to the northwest across the former UST area at a gradient of 0 02 ft/ft ' No petroleum hydrocarbons or fuel oxygenates were detected in any of the analyzed samples Ground water elevations are summarized in Table 3, analytical results of ground water T _ samples are summarized In Table 4 r14 February 2005-a deep soil pilot borings were advanced to 65 feet bsg and completed as monitoring well MW-9 utilizing 2-Inch diameter PVC well casing with screen from 60 feet to 65 feet bsg As-built monitoring well diagrams for MW-1 through MW-8 are shown on Figure 3 and, boring logs for wells MW-1 through MW-9 are Included with Appendix A The soil boring was continually cored to the total depth of 65 feet bsg The soil profile depicted a silt and clay section,with two sand or silty sand layers at 30 feet bsg 60 feet bsg The vertical extent of impacted ground water was defined by ground water sampling • Advanced CeoEnvironmental,Inc