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06 July 1999 <br /> . AGE-NC Project No. 95-0197 <br /> Page 4 of 8 <br /> Approximately 15 to 20 gallons of ground water were purged from each monitoring well until <br /> ' ground water was visually sediment free. Purged ground water was containerized in properly labeled <br /> D.O.T.-approved model 17H 55-gallon drums and was stored on-site in an area lacking public <br /> access. Monitoring well field logs for development activities are included in Appendix C. <br /> 2.2. QUARTERLY MONITORING AND SAMPLING ACTIVITIES <br /> On 12 April 1999, ground water monitoring and sampling was performed on monitoring wells MW- <br /> 1 through MW-4. Depths to ground water and total well depths were measured to the nearest 0.01- <br /> foot utilizing a Solinst water Ievel meter. Ground water elevations were calculated by subtracting <br /> the depth to ground water from the surveyed casing elevations (Table 2); ground water elevations <br /> ' were plotted and contoured on a scaled site plan (Figure 9). <br /> The ground water levels from monitoring wells MW-1 through MW-4 achieved a minimum of 80 <br /> ' percent recharge prior to sample collection. Ground water samples were collected utilizing <br /> disposable polyethylene bailers. Ground water samples from MW-1 through MW-4 were transferred <br /> • <br /> into,EPA-approved 40-m1 VOA vials containing 0.5 ml 18% hydrochloric acid as a sample <br /> ' preservative and into one-liter amber bottles. Care was taken to ensure that visible air bubbles were <br /> not present in-the VOAs after filling and capping. The ground water sample containers were labeled <br /> with the well designation, date, time, and sampler's initials. <br /> Following collection, each sample was logged on a chain-of-custody form, placed in a chilled <br /> ' container and transported to.a DHS-certified laboratory for analysis in accordance with: <br /> C EPA Method 8015 Modified for TPH-g and TPH-d, <br /> o EPA Method 8020 for BTEX with MTBE, and <br /> EPA Method 8260 Modified for TBA, DIPS, ETBE, TAME and MTBE. <br /> The results of the analysis are contained in Table 3. <br /> 1 <br /> 3.0. FINDINGS <br /> ' Soil descriptions were utilized to construct the cross sections resented in Figures 3 and 4. <br /> p P g <br /> Laboratory analysis of twelve soil samples did not detect petroleum hydrocarbons, volatile aromatics <br /> or fuel oxygenated compounds in any of the analyzed soil samples. <br /> Advanced GeoEnvironmental,Inc. <br />