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19 July 2004 . AGE-NC Project No. 95-0185 Page 3 of 4 3.1. GROUND WATER GRADIENT AND FLOW DIRECTION During the June 2004 sampling event,the depth to ground water ranged from 27.15 feet(MW-4)to 28.25 feet(MW-5)below casing grade;free product was detected in well MW-1,approximately 0.15 ' feet was measured. The depth to ground water at well MW-1 (27.65 feet)was affected by the presence of free product; ' the depth was recalculated (27.53 feet) utilizing the measured thickness of free product in well MW-1: Dw=Dm - (tg * d�dw) ' D,V=Corrected depth to water Dm=Measured depth to water(-27.65 feet) tg= Total thickness of free product 00.15 feet) dg=Density of free product(gasoline at—0.75 gm/ml) d,,,=Density of water(-1.0 gm/ml) ' Ground water elevation, based on the measurements collected with the Solinst and free-product probe during June ranged from 32.24 feet (MW-.1) to 32.33 feet (MW-2) above mean sea level (MSL). Based on the June data of ground water elevations from wells MW-1, MW-2, MW-3 and ' • MW-5, the ground water flow was away from well MW-2 towards the northwest at a gradient of 0.0004 ft/ft (Figure 3). 3.2. LABORATORY RESULTS OF GROUND WATER SAMPLES TPH-d was detected in the ground water sample collected from well MW-1 at concentration a 1,100,000 micrograms per liter(pg/l). TPH-g was detected in sample MW-1 at a concentration of ' 4,206 µg11.BTEX compounds and fuel additives were not detected in the analyzed samples.Current and previous analytical results are summarized in Tables 2 and 3. The laboratory report (CTEL Laboratory I.D.0406104),quality control and quality assurance data(QA/QC)and chain of custody . ' forms are included in Appendix C. ' 4.0. CONCLUSIONS Based on the data collected during the June 2004 monitoring period, AGE concludes: • Free product has been present intermittently in well MW-1 and MW-4 since the June 2002 ground water monitoring event. ' Advanced GeoEnviron mental,Inc.