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' 17 May 1999 <br /> AGE-NC Project No 96-0249 <br /> Page 4 of 9 <br /> 2 2 QUARTERLY MONITORING AND SAMPLING ACTIVITIES <br /> 1 On 02 May 1999,ground water monitoring and sampling was performed an monitoring wells MW-1 <br /> through MW-6 Depths to ground water and total well depths were measured to the nearest 0 01-foot <br />' utilizing a Solinst water level meter Ground water elevations were calculated by subtracting the <br /> depth to ground water from the surveyed casing elevations (Table 2), ground water elevations were <br />' plotted and contoured on a scaled site map (Figure 12) <br /> The ground water levels from monitoring wells MW-1 through MW-6 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-6 were transferred <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 /> G EPA Method 8015 Modified for TPH-g and TPH-d, <br /> G EPA Method 8020 for BTEX with MTBE, and <br /> G EPA Method 8260 Modified for TBA, DIPE, ETBE, TAME and MTBE <br />' The results of the analysis are contained in Table 3 <br /> 3 0. FINDINGS <br />' Soil descriptions were utilized to construct the cross sections presented in Figures 3, 4 and 5 <br /> Laboratory analysis of seventeen soil samples detected petroleum hydrocarbons In three samples, <br />' volatile aromatics were detected in eleven soil samples, MTBE was detected in one of the analyzed <br /> soil samples <br /> AGE was able to determine general ground water flow direction and gradient from ground water <br /> monitoring data Laboratory analysis of six ground water monitoring well samples detected total <br />' petroleum hydrocarbons and volatile aromatics in all six ground water samples, MTBE was detected <br /> in two ground water samples <br /> Advanced GeoEnvironmental,Inc <br />