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17 April 2000 <br /> AGE-NC Project No. 95-0100 <br /> Page 5 of 6 <br />' 3.2. HYDROCARBON-IMPACTED SOIL <br /> A total of fifteen soil samples were analyzed for TPH-g, TPH-d, BTEX, MTBE and the suite of five <br />' fuel additives by EPA Method 8260 Modified. <br /> • TPH-g and BTEX compounds were not detected in the fifteen soil samples analyzed. <br />' 0 The oxygenated fuel additive MTBE was detected three soil samples analyzed. Samples <br /> collected from boring B 1 and B3 at depth of 50 feet and/or 55 feet bsg had detectable MTBE <br />' concentrations. <br /> • Sample MWI-50 contained MTBE at 180 micrograms per kilogram (,ug/kg) by Method <br /> 8260. Soil sample MW 1-55 had detectable MTBE at a concentration of 7.6 4g/kg by Method <br />' 8260. ' 14 <br /> • Soil sample MW3-50 had detectable MTBE at a concentration of,1-4'fng/kg by Method 8020 <br />' and 130µg/kg by Method 8260 Modified. <br /> • No other oxygenated fuel additives were detected in soil samples: <br /> Laboratory results of soil samples analyzed for petroleum hydrocarbons are summarized in Tables 1 <br /> and 2. The laboratory reports (MAI Laboratory ID 17933 to 17936 and 19820 to 19828), quality <br />' assurance and quality control (QA/QC) reports and chains-of-custody are included in Appendix E. <br />' 3.3. HYDROCARBON-IMPACTED GROUNDWATER <br /> Two ground water samples have been collected on two separate dates and analyzed. Each sample <br />' was analyzed for TPH-g, BTEX, and fuel additives DIPE,'ETBE, MTBE, TAME and TBA. <br /> • TPH-g was detected in the ground water samples collected from well MW-2 at a <br />' concentration of 140 micrograms per liter (,ug/l). Benzene, toluene, ethylbenzene and total <br /> xylenes were detected in the sample from well MW-2 at concentrations of 6.1µg/1, 16 µg11, <br />' 2.5 4g11 and 13 ug/l, respectively. <br /> Neither BTEX compounds nor TPH-g were detected in the water sample collected from well <br /> MW-1. <br /> MTBE was detecfed in watersamples collected frortm-well IVIW=1 at eoncenfrationa of 120 ` T <br /> ,icgll and 97 µg11, by EPA Methods 8020 and 8260, respectively. <br /> 1 <br /> • Analytical results of ground water samples analyzed are summarized in Table 4. The laboratory <br />' reports (MAI Laboratory ID 17932 and 23389), quality assurance and quality control (QA/QC) <br /> reports and chain-of-'custody forms are included in Appendices E. <br /> Advanced GeoGnvironmental,Inc. <br />