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31 January 2000 <br /> AGE-NC Project No. 99-0646 . <br /> Page 4 of 4 <br /> lr <br /> in the samples collected at depths of 20 and 25 feet bsg in probing B1, defining the vertical <br /> extent of impacted soil to approximately 18 feet bsg. <br /> • Only xylenes were detected in the sample collected from a depth of 15 feet.bsg in probing <br /> B3 at a concentration of 0.019 ppm.Hydrocarbons were detected in the soil sample collected <br /> at a depth of 20 feet bsg in probing B3, advanced approximately 12 feet west of probing B 1. <br /> Petroleum hydrocarbons were not detected in the samples collected from probings B2 or B4, <br /> limiting the lateral extent of impacted soil. The approximate lateral extent of impacted soil <br /> is depicted on Figure 2. <br /> 6.0. RECOMMENDATIONS <br /> Due to the high concentrations of hydrocarbons detected in soil beneath the former dispenser <br /> location, remediation is recommended to prevent future migration of contaminants. Due to the <br /> limited extent of impact and the fine-grained nature of the impacted soil, AGE recommends <br /> excavation of the impacted soil. <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 upon field <br /> measurements and analytical results provided by an independent laboratory. Evaluations of the <br /> geologic/hydrogeologic conditions at the site for the purpose of this investigation are made from a <br /> limited number of available data points (i.e. probe boring soil samples) and subsurface conditions <br /> may 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 />