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22 May 2000 AGE-NC Project No. 00-0704 Page 6 of 7 Former UST System Area Soil boring B8 was advanced near the area of the former Graylift, Inc. dispenser island, approximately 8 feet north of the former 10,000-gallon unleaded gasoline UST and 5,000-gallon diesel UST.TPH-g and TPH-d were detected in soil sample B8-10'at concentrations of 510 ppm and 5,800 ppm, respectively. Former Shell Service Station Area Soil boring B5 was advanced on the property formerly utilized by Shell Oil, for a gasoline service station. Petroleum hydrocarbons TPH-g, TPH-d, and TPH-mo were detected in sample B5-10' at concentrations as high as 310 ppm, 170 ppm, and 2.5 ppm, respectively. VOCs, were detected by EPA Method 8260B in sample B5-10'.Detected VOCs included n-butylbenzene,naphthalene, 1,2,3- trimethylbenzene, and 1,3,5-trimethylbenzene, which were detected at concentrations of 1.4 ppm, 6.2 ppm, 4.4 ppm, and 0.95 ppm, respectively. A soil sample collected from 20 feet bsg in boring B5 (B5-20')had a faint hydrocarbon odor,but did not have VOC concentrations high enough to be detected by field screening; the sample was not analyzed in the laboratory. Analytical results of soil samples are summarized in Table 1 through Table 4.The laboratory reports and chain-of-custody forms are included in Appendix B. 4.5. RESULTS OF GROUND WATER SAMPLE ANALYSIS One grab ground water sample was collected from B 1 and submitted to a DHS-certified laboratory for analysis.None of the analytes were detected at concentrations at or above the laboratory reporting limit. The analytical results of the water sample is summarized in Table 1 and Table 2. The laboratory reports and chain-of-custody forms are included in Appendix B. 5.0. SUMMARY AND CONCLUSIONS Based on data collected during the 21, 22, and 23 March 2000 soil borings, and grab ground water sampling, AGE concludes: • Field observations, OVM readings, and laboratory analysis indicate that the most intense hydrocarbon-impact in soil is in the area of borings B8, B5, and HA1, HA2, and HA3. • Laboratory analysis of soil sample B8-10' indicated that the petroleum hydrocarbon-impact in the former Graylift UST/dispenser area consisted primarily of diesel fuel;it is not possible to determine whether the former dispenser,the former USTs or both were responsible for the release. Advanced GeoEnviron mental,Inc.