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' 04 February 2004 <br /> AGE-NC Project No 95-0173 <br /> IPage 4 of 10 <br />' ground water was containerized in a properly labeled D O T -approved model 17H 55-gallon drums <br /> and was stored on-site in an area lacking public access <br /> I Following well development, approximately three feet of bentonite chips (annular seal)was placed <br /> above the filter pack and was hydrated with clean tap water The remaining annular space was <br /> backfilled with portland cement(grout seal) An as-built monitoring well-construction diagram for <br />' well EW-1 is included as Figure 3 <br />' 2 2 GROUND WATER EXTRACTION WELL INSTALLATION FINDINGS <br /> Field data was utilized to select soil samples for laboratory analysis,hydrocarbon impact to soil was <br />' quantified by laboratory analysis <br /> 2 2 1 Stratigraphy <br />'. Generally,a stiff to hard,clayey silt with fine sand was encountered between 15 feet and 40 feet bsg <br /> and at 50 feet bsg Medium dense to dense,poorly graded, silty fine sand was encountered at 45 feet <br /> bsg and between 55 and 65 feet bsg Boring logs are included in Appendix B <br />' Saturated soil was encountered from the 40 foot sample,the static ground water level was measured <br /> at approximately 32 feet bsg utilizing a Solinst water level meter <br /> 2 2 2 FIELD EVIDENCE OF HYDROCARBON-IMPACTED SOIL AND GROUND WATER <br /> Faint to intense hydrocarbon odor was noted in duplicate soil samples collected at depths between <br /> 15 and 65 feet bsg Utilizing a PID (Thermo Environmental 580A, 10 0 eV, calibrated to <br /> I isobutylene) meter, organic vapor was observed at depths between 15 and 65 feet bsg at <br /> concentrations as high as 749 parts per million (ppm) Petroleum hydrocarbon odor and organic <br /> vapor field measurements were recorded on boring logs contained in Appendix B <br /> 2 2 3 LABORATORY RESULTS OF SOIL SAMPLES <br /> IA total of four soil samples were submitted to a DHS-certified laboratory for analysis of TPH-g, <br /> BTEX,MTBE,TAME,DIPE,ETBE and TBA Additionally, four soil samples were collected from <br /> the drill cuttings stockpiled in the 20-yard soil bin and composited for analysis of total lead <br /> Advanced GeoEnvnronmental,Inc <br /> I <br />