Laserfiche WebLink
1 - - <br /> I <br /> • 13 September 2001 <br />' AGE-NC Protect No 95-0128 <br /> Page 4 of 7 <br />' 27 GROUND WATER SAMPLE COLLECTION <br /> A water sample was collected from each well using a new disposable plastic bailer Immediately <br /> upon retrieval, samples were transferred into three 40-milliliter(ml) EPA-approved volatile organic <br /> analysis (VOA) vials containing 0 5 ml 18% hydrochloric acid (sample preservative) and into one <br />' 1-liter amber bottle without the preservative Samples were placed in a chilled container and <br /> transported under chain-of-custody to MAI, a DHS-certified laboratory The ground water samples <br /> were analyzed for <br />' 0 Total petroleum hydrocarbons Quantified as gasoline (TPH-g) and diesel (TPH-d) in <br /> accordance with EPA Method 8015 Modified, <br />' e Volatile aromatic hydrocarbons -benzene, toluene, ethylbenzene and total xylenes (BTEX) <br /> in accordance with EPA Method 8020, and <br /> C Oxygenated compounds - di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), <br /> methyl tertiary-butyl ether (MTBE), tertiary-amyl methyl ether (TAME), tertiary butanol <br /> • (TBA), methanol, ethanol, ethylene dibromide (EDB) and 1,2-dichloro ethane (1,2-DCA) in <br /> accordance with EPA Method 8260 Modified <br />' 3.0. FINDINGS <br />' Ground water elevations were determined by subtracting the measured depths-to-water from the <br /> surveyed casing elevations Ground water flow directions were determined by contouring the water <br /> elevations on a scaled site plan Contaminate impact to ground water and soil samples was assessed <br />' by laboratory analysis Soil descriptions were incorporated into the site hydrogeologic model <br /> 3 1 STRATIGRAPHY AND GROUND WATER OCCURRENCE <br /> Fine grained soil,primarily silt,was encountered at 25, 30, 35, 40 and 45 feet bsg in bonng MW 14, <br />' MW 15 and MW 16 Silt was encountered at 25 feet and 30 feet bsg in boring MW 13, but silty sand <br /> and poorly graded sand was encountered at 35, 40 and 45 feet bsg in the same boring Clay with low <br />' percentage of silt was also present in the soil sample collected from the bottom of the 45-foot sample <br /> from boring MW13 Ground water was present at 35 feet bsg Petroleum hydrocarbon odor was not <br /> noted in the samples collected Organic vapor was not detected in the soil samples recovered from <br /> bonngs MW 13 through MW 16 PID data is included on the boring logs (Appendix A) <br /> Advanced GeoEnvironmentai Inc <br />