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_ t _ 1_Y <br /> August 1999 , <br /> •• : AGE-NC Project No. 95-0109 <br /> , <br /> Page 5 'of 10 <br /> • TPH-g in accordance with EPA-Method 5030/8015m; <br /> .Volatile organic compounds(BTE3� with-MTBE in accordance with EPX Method'602; and <br /> Volatile organic compounds with oxygenated compounds '(di-isopropyl ether [DIPE],•ethyl - <br /> i tertiary-butyl ether[ETBE], MTBE','tertiary-amyl methyl ether [TAME] andtertiary butanol, <br /> [TBA]) in accordance with EPA-Method 8260/8260m. <br /> Water samples from MW-7, MW-8, MW-9, MW-12, MW-13,'MW-14 and"EW-1"coIlected'during <br /> .the March 1999 sampling event were also analyzed for: _ <br /> Volatile halocarbons in accordance with EPA Method 601. <br /> Samples collected from MW-9 and MW-1'4 in March 1999 were-also transferred.into'40`-ml`EPA .• <br />' approved VOA vials-without added preservative. These samples were transported to,A. Keith <br /> Kaufrnan and analyzed for physicochemical properties and microbiological ,enumeration., <br /> 3.0. FINDINGS <br /> 3. <br /> The' <br /> approximate lateral and vertical extent of remaining hydrocarbons was estimated and cross <br /> sections were prepared. The approximate mass of remaining hydrocarbons and percentage reduction <br />' of hydrocarbons.'were calculated from the cross'sections. . <br /> Groundwater elevation and flow direction were calculated-from field data; hydrocarbon-impact to <br />' ground water.was inferr'e'd'-,'from laboratory,analysis of the.ground;water samples:.::. - ; <br /> 3.1. STRATIGRAPHY <br /> Silty sand was the dominant soil type'encounter'ed at the site, while sandy silt was common. Soil ' <br />' fypes generally correspond with those previously.encountered at the site. Boring-logs are included, <br /> in Appendix A. Three,geological cross sections,"prepared for the Quarterly Report- December 1998,' <br /> are included as Figures 9, 12 and,15. Lines of cross section;are depicted on Figure 2. <br /> 3.2:" ANALYTICAL RESULTS'OF SAMPLES . <br /> Organic vapor was detected at concentrations�as�high as;8472'parts per million(ppm)in soil samples <br /> collected from borings P22•through P27. <br /> . 'TPH'g•was detected at a concentration of 5,9Wppm (reported as rmilligrams per kilogram) in the <br /> Advanced GeoEnviron mental,Inc. <br />