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• <br />0 <br />12 December 2005 <br />AGE -NC Project No 03-1055 <br />Page 4 of 6 <br />2 2 2 Collection and Analysis of Ground Water Samples <br />Water samples were collected from each well using a disposable bailer after allowing the wells to <br />achieve a minimum 80% recovery of the pre -purge water volume Each water sample was transferred <br />into laboratory -supplied 40 -milliliter (ml) volatile organic analysis (VOA) vials containing 0 5 ml <br />hydrochloric acid solution as preservative, and one 1 -liter amber bottle without preservative After <br />collection, the samples were properly labeled, placed in a chilled container, and transported under <br />chain -of -custody to CTEL for analysis The samples were analyzed for <br />Total petroleum hydrocarbons quantified as gasoline (TPH-g) and total petroleum <br />hydrocarbons quantified as diesel (TPH-d) in accordance with EPA Methods 8015M, <br />Benzene, toluene, ethylbenzene and total xylenes (BTEX) in accordance with EPA Method <br />8260B, and <br />Fuel additives di -isopropyl ether (DIPE), ethyl tertiary -butyl ether (ETBE), methyl tertiary - <br />butyl ether (MTBE), tertiary -amyl methyl ether (TAME), tertiary butanol (TBA), <br />1,2-dichloroethane (1,2 -DCA) and ethylene dibromzde (EDB) in accordance with EPA <br />Method 8260B <br />3.0. FINDINGS <br />Soil stratigraphy, ground water elevation, flow direction, and gradient were determined from field <br />data The contaminant impact to soil and ground water was quantified from laboratory analytical <br />data <br />31 STRATIGRAPHY <br />In general, orange to reddish brown clayey silts and silty clays, with medium to high plasticity and <br />variable toughness was encountered from surface grade to 20 feet bsg in all borings, reddish -brown <br />sandy silt with clay of medium plasticity was encountered in boring MW8 at 10 feet bsg, gray clayey <br />clayey silt with medium plasticity was encountered in boring MW8 at 15 feet bsg, reddish -brown <br />silty clay with high plasticity was encountered in boring MW8 at 20 feet bsg, orange/reddish-brown <br />clayey salts with medium plasticity were encountered in boring MW9 at 15 feet bsg and in boring <br />MW 10 from the surface to 20 feet bsg <br />Strong hydrocarbon odor was encountered in boring MW8 10 to 15 feet bsg (See Appendix B for <br />boring logs) <br />Advanced GeoEnvironmental, Inc <br />