Laserfiche WebLink
05 November 1997 <br /> AGE-NC Project No 96-0249 <br />' Page 4 of 7 <br />' 3 6 EQUIPMENT DECONTAMINATION <br /> Prior to sample collection, Geoprobe soil and ground water sampling equipment was thoroughly <br />' rinsed with clean water after wasting with a solution of Alconox Geoprobe rods were cleaned prior <br /> to soil probe boring advancement <br />! 4.0 FINDINGS <br />' 4 1 SOIL PROFILE <br /> Generally, a dark brown to dark gray, damp silty sand was encountered from sui face grade to depths <br />' of approximately 12 feet bsg A mottled green and gray, moist, fine to medium sand was encountered <br /> from 12 feet to 17 feet bsg A mottled green and gray, very moist sandy silt was encountered from <br /> 17 feet bsg to depths of 20 feet bsg <br />' Groundwater was encountered in each bona depth f <br /> g at a pt o approximately 21 feet bsg Boring logs <br /> are included in Appendix A General lithology beneath the site in cross sectional view is depicted on <br /> Figure 3 - 0 oss Section A -A ' <br /> i4 2 FIELD EVIDENCE OF HYDROCARBON-IMPACTED SOIL AND GROUND WATER <br /> Moderate petroleum hydrocarbon odor was noted in duplicate soil samples collected from P 1 and P3 <br /> between 1 and 20 feet bsg, slight to moderate petroleum hydrocarbon odor was noted In duplicate <br /> soil samples collected from P2 and P4 between 1 and 20 feet bsg <br /> Moderate petroleum hydrocarbon odor was noted In grab ground water samples collected from <br /> probings P 1 through P4 A black sheen was observed in ground water samples P2-H20 and P3-H2O <br /> Organic vapor was detected in soil sample duplicates from P1 through P4 using a PID at <br /> concentrations as high as 140 parts per million (ppm) <br /> 43 ANALYTICAL RESULTS OF SOIL SAMPLES <br /> A total of four soil samples were sum - <br /> p submitted to MAI for analysis of TPH g, TPH-d, BTEX and <br /> MTBE TPH-g was detected in soil samples collected from probe borings PI through P4 at <br /> concentrations up to 3,200 parts per million (ppm, reported as milligrams per kilogram) TPH-d was <br /> detected in soil samples collected from P 1 through P4 at concentrations up to 7,100 ppm BTE&X <br /> were detected in soil samples collected from P 1 though P4 at concentrations up to 180 ppm, MTBE <br /> Ads arced GeoEm iromnental,Inc <br />