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1 <br /> 23 March 2001 <br /> AGE-NC Project No 97-0343 <br />' Page 2 of 7 <br />' 2 2 LOGGING <br /> Soil was extruded from a second brass sleeve or from the unpreserved portions of the soil in the core <br />' barrel samples and was screened for the presence of organic vapor using an organic vapor meter <br /> (OVM) equipped with a photo-ionization detector (PID Thermo Environmental 580A, 10 0 eV, <br /> calibrated to isobutylene), and the OVM readings were recorded on the boring log The soil was then <br />' visually described in accordance with the Unified Soil Classification System (see Appendix A) <br />' 2 3 WELL AND BORING COMPLETION <br />' Pilot borings MW4 through MW7 were completed as ground water monitoring wells using two-inch <br /> diameter PVC casing with 0 020-inch slotted screen installed from approximately 60 feet to 40 feet <br /> bsg and with blank casing extended to the surface The filter pack (No 2/12 Lonestar sand) was <br />' installed from 60 feet to approximately 38 feet bsg A nominal 3-foot bentonite chip plug was then <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 A <br />' 2 4 LABORATORY ANALYSES OF SOIL SAMPLES <br /> Selected soil samples were analyzed for <br /> • Total petroleum hydrocarbons quantified as gasoline (TPH-g) and diesel (TPH-d) in <br /> accordance with EPA Methods 5030/8015 Modified and 3550/8015 Modified, <br />' • Volatile aromatic hydrocarbons -benzene, toluene, ethylbenzene and total xylenes (BTEX) <br /> and methyl tertiary-butyl ether(MTBE) in accordance with EPA Method 8020, <br />' • Oxygenated compounds - di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), <br /> MTBE, tertiary-amyl methyl ether(TAME) and tertiary butanol (TBA) in accordance with <br />' EPA Method 8260 Modified, and <br /> • Ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) in accordance with EPA <br /> Method 8260 Modified <br /> • <br /> Advanced GeoEnvironmental,Inc <br />