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22 May 2000 <br /> AGE-NC Project No. 00-0704 <br /> Page 7 of 7 <br /> • Laboratory analysis and field screening data of soil sample B5-10' indicate petroleum <br /> hydrocarbon-impact to soil at a depth of 10 feet bsg on the former Shell service station site. <br /> An OVM reading of 0.2 ppm from sample B5-5'may indicate a shallow release originating <br /> from or near the surface, possibly from a former dispenser island or product piping in that <br /> area. <br /> • Laboratory analysis of lead concentrations as high as 200 ppm in soil samples HA4-2' and <br /> B12-6" (2:1), may indicate a release of the metal to soil in those areas. The concentration <br /> detected exceeded a concentration 10 times greater than the soluble threshold limit <br /> concentration (STLC) for lead. <br /> 6.0. RECOMMENDATIONS <br /> Based upon data collected during March 2000,AGE recommends additional subsurface investigation <br /> in the areas near borings HAI,HA2,HA3,B5 and B8 to determine the vertical and lateral extent of <br /> petroleum hydrocarbon-impact in soil and/or ground water. Additional assessment in the HA4 and <br /> B 12 areas for lead is warranted.Additional assessment of soil and ground water on the former Shell <br /> service station property. <br /> 7.0. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities. The findings were based mainly <br /> upon analytical results provided by an independent laboratory. Evaluations of the geologic/hydro- <br /> geologic conditions at the site for the purpose of this investigation are made from a limited number <br /> of available data points(e.g.soil samples and ground water samples),and subsurface conditions may <br /> vary away from these data points. No other warranty, expressed or implied, is made as to the <br /> professional recommendations contained in this report. <br /> Advanced GeoEnviron mental,Inc. <br />