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1 29 July 2005 • AGE-NC Project No. 95-0185 Page 3 of 4 3.1. GROUNDWATER GRADIENT AND FLOW DIRECTION During the January 2005 sampling event, the depth to.ground water was 25.02 feet. During the February 2005 sampling event,the depth to ground water ranged from 24.71 feet(MW-4)to 25.34 feet(MW-2) below casing grade. During the February 2005 sampling event, the ground water elevation at the site ranged from 34.14 feet (MW-2)to 34.93 feet (MW-3) above mean sea level(MSL); the average ground water elevation increased approximately 2.5 feet since the previous monitoring event in September 2004. ' The round water elevation determined from the monitorin well MW-2 casing was likely incorrect g g g due to casing modifications(damage and repairs)conducted prior to the ground water level gauging event and was therefore discounted from the ground water elevation modeling. The ground water flow direction was inferred to be toward the north to northwest at a gradient of approximately 0.003 foot/foot(ft/ft) near the former UST locations (Figure 3). 3.2. LABORATORY RESULTS OF GROUND WATER SAMPLES TPH-d, TPH-g, BTEX compounds and fuel additives were not detected in the sample from wells MW-1, MW-2 and MW-3. TPH-g and TPH-d were detected in the sample collected from well MW-4 during the February sampling at concentrations.of 1,400 micrograms per liter (µg/1) and 15,000 µg/i, respectively. Current and previous analytical results are summarized in Tables 2 and 3. The laboratory reports (CTEL Project No. CT214-0502009 and CTEL Project No. 214-0502160), quality control/quality assurance (QA/QC) reports and chain of custody forms are included in Appendix C. GeoTracker r confirmation pages of the submitted laboratory electronic deliverable format(EDF)files and depth to water measurements are provided in Appendix.D. 4.0. CONCLUSIONS Based on the data collected during the January 2005 and February 2005 monitoring period, AGE concludes: • Visual free product has been resent intermittently in wells MW-1 and MW-4 since the June p p 2002 ground water monitoring event.Well MW-5 was inaccessible this quarter,so it was not ' monitored. Advanced GeoEnvironinental,Inc.