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19 January 2012 <br /> AGE-NC Project No. 11-2006 <br /> Page 5 of 7 <br /> Positive PID measurements were generally encountered in boring B8 at concentrations <br /> below 1 part per million volume, which likely indicates highly organic soils and not the <br /> presence of petroleum hydrocarbons in the sampling location. <br /> A total of two soil samples were submitted for laboratory analysis from boring 137 and B8 <br /> (137-20 and 138-20). Hydrocarbon-related constituents, volatile organic compounds nor <br /> semi-volatile organic compounds were detected in either of the analyzed soil samples. <br /> Selected metals were detected in samples 137-20 and 138-20, as well as in samples 131-5, <br /> 132-5 and 136-5, collected during the November 2011 investigation. However, detections of <br /> metals in all samples were below environmental screening level thresholds for commercial <br /> land use. Soil analytical results are summarized in Tables 1 and 2. Laboratory analytical <br /> reports are included in Appendix C. <br /> Grab Ground Water Analytical Results <br /> Grab ground water samples were from 26 to 30 feet bsg in borings B7 and 138. Target <br /> analytes were not detected in either of the two locations above laboratory reporting limits. <br /> Ground water analytical results are summarized in Table 3. Laboratory analytical results <br /> are included in Appendix C. <br /> Soil-Vapor Analytical Results <br /> One soil-vapor sample was collected from each of the two vapor borings (V1 and V2) at <br /> 5 feet bsg, at the southern edge of the on-site building. Soil-vapor samples were submitted <br /> to CTEL foranalysis of the constituents listed above. A summary of findings is listed below: <br /> Sample ID Gasoline BTEX <br /> V1 24,000 Benzene: ND <br /> Toluene: ND <br /> Ethylbenzene: NO <br /> Total Xylenes: NO <br /> V2 1,300 Benzene: NO <br /> Toluene: NO <br /> Ethylbenzene: ND <br /> Total Xylenes: NO <br /> Notes: <br /> All concentrations in micrograms per cubic meter(pg/m') <br /> BTEX: Benzene,toluene,ethylbenzene and total xylenes <br /> ND:not detected at or above detection limits <br /> Advanced Geo Environmental,Inc. <br />