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' 20 December 2004 <br /> AGE-NC Project No 98-0452 <br />' Page 2 of 4 <br />' • Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in <br /> accordance with EPA Method 8015 Modified, <br /> • Benzene,toluene,ethylbenzene and total xylenes(BTEX)and the fuel additives di-isopropyl <br />' ether (DIPE), ethyl tertiary-butyl ether (ETBE), methyl tertiary-butyl ether (MTBE), <br /> tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), methanol and ethanol in <br />' accordance with EPA Method 8260B, and <br /> • The lead scavengers 1,2-dichloroethane (1,2-DCA) and ethylene dibromide (EDB) in <br /> accordance with EPA Method 8260B <br />' Sampling equipment was washed in an Alconox solution and rinsed with water prior to each <br /> sampling run to minimize cross-contamination <br /> 1 <br /> 22 LOGGING <br />' Soil was extruded from a second brass sleeve and screened for the presence of organic vapor using <br /> an organic vapor meter (OVM) equipped with a photo-ionization detector (PID Thermo <br /> Environmental 580B, 10 0 cV, calibrated to isobutylene), the OVM readings were recorded on the <br /> boring log The soil was then visually described in accordance with the Unified Soil Classification <br /> System (see Appendix C) <br /> 23 WELL COMPLETIONS <br /> r Pilot borings MW-4 through MW-7 were completed as ground water monitoring wells using <br /> g <br /> two-inch diameter PVC casing with 0 010-inch slotted screen installed from approximately 5 feet <br /> to 15 feet bsg with blank casing extended to the surface The filter pack(No 2112 Lonestar sand)was <br /> installed from approximately 3 feet to 15 feet bsg A nominal 2-foot bentonite chip plug was <br /> installed above the filter pack and hydrated The wells were then grouted to near the surface with <br /> portland cement Water-tight, traffic-rated well boxes were then installed over the wells As-built <br /> well diagrams are depicted on the boring logs in Appendix C <br /> 2 4 MONITORING WELL DEVELOPMENT <br /> On 16 April 2004,monitoring wells MW-4 through MW-7 were developed utilizing a stainless steel <br /> hand bailer and a two-stage submersible pump Groundwater was purged from each monitoring well <br /> I until ground water was visually sediment free, between 30 and 35 gallons of water were removed <br /> from the wells Purged ground water was containerized in properly labeled DOT-approved model <br /> 17H 55-gallon drums and stored on-site Field sheets and data are included 1n Appendix D <br /> IAdvanced GeoEnvironmental,Inc <br />