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I n <br /> 05 April 1996 <br /> AGE-NC Project No 95-0111 <br /> Page 3 of 6 <br /> I <br />' 3 3 WELL COMPLETION <br /> Each boring was completed as a 2-inch diameter ground water monitoring well using PVC casing <br /> with 0 020-Lech slotted screen from 5 to 15 feet The filter pack (#2 lonestar sand) was installed from <br /> 3 to 15 feet Bentonite chips were used to make a two-foot plug and the well was grouted to the <br />' surface with Portland cement <br />' 3 4 MONITORING WELL PURGE PROCEDURES <br /> On 07 March 1996, the water level in each monitoring well was measured relative to the top of the <br />' casing using a Solinst water level meter The depths to ground water and relative ground water <br /> elevations are depicted in Table 1 A thin sheen of free product was present in MW-4 and MW-5, <br /> however an MMC interface probe was unable to measure the product thickness <br /> After water levels were measured, a two-stage submersible pump was used to purge each well Five <br /> to six gallons (minimum of three well volumes) of water were removed from each well until <br /> temperature, pH and conductivity had stabilized (Appendix B) A bailer was used to remove free <br /> product from MW-4 and MW-5 prior to purging with the submersible pump Stabilization parameters <br /> were measured at one-gallon intervals using an ICM water analyzer Purged water was stored on-site <br />' in 55-gallon DOT drums <br /> 3 5 - COLLECTION OF GROUND WATER SAMPLES <br />' Water samples were collected from each well using a new disposable plastic bailer Each water <br /> sample was collected in two 40-m1 VOA vials and one I-liter amber bottle After collection„the <br /> samples were placed in a chilled container and transported under chain-of-custody procedures to MAI <br />' laboratory Each sample was analyzed for TPH-g, TPH-d and BTE&X in accordance with EPA <br /> methods 5030/8015M 5030/8015m and 602, respectively Samples collected from MW-4 and MW-5 <br /> were also analyzed for methyl-tertiary butyl ether (MTBE) in accordance with EPA methods 602 <br /> 1 <br /> I4.0 FINDINGS <br /> 41 SOIL PROFILE <br /> In MW-5, silty clay was encountered from one to two feet bsg, pea gravel was encountered from two <br /> to 14 feet bsg, and silty clay was encountered from 14 to 15 feet (total depth) bsg Silty clay was <br /> encountered throughout the entire profile in MW-6 Water was encountered in both borings at <br /> approximately 6,feet bsg <br />