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31 January 2000 <br /> �•.� AGE-NC Project No. 99-0646 <br /> Page 3 of 4 <br /> • Fuel oxygenates; di-isopropyl ether(DIPE),ethyl tert-butyl ether(ETBE), MTBE,tert-amyl <br /> methyl ether (TAME), and tert-butanol (TBA) in accordance with EPA Method 8260 <br /> modified. <br /> 4.0. FINDINGS <br /> 4.1. SOIL PROFILE <br /> Gravel and organic clay were encountered in the sample collected from a depth of 5 feet bsg in <br /> probing B 1. Silt was encountered in the remaining samples from all four borings to a depth of 20 feet <br /> bsg. Silty sand was encountered in the 25 and 30-foot samples from each boring(see Boring Logs, <br /> Appendix A). <br /> Organic vapor was detected in four of the six soil samples collected from boring B 1 at concentrations <br /> as high as 1,318 ppm (10 feet bsg). Organic vapor was not detected in samples collected from <br /> borings B2, B3 or B4. <br /> 4.2. ANALYTICAL RESULTS OF SAMPLES <br /> TPH-g was only detected in samples B1-10 and B1-15 at concentrations of 11,000 parts per million <br /> (ppm, reported as mg/kg) and 760 ppm, respectively. <br /> w Ethylbenzene was detected in samples B1-10 and B1-15 at concentrations of 8.9 ppm and 1.1 ppm, <br /> respectively. Xylenes were detected in samples B1-10, B1-15 and B3-15 at concentrations of 1,500 <br /> ppm, 16 ppm and 0.019 ppm, respectively. Other petroleum hydrocarbon compounds were not <br /> detected in soil samples collected at the site. Fuel oxygenates were not detected in the three soil <br /> samples analyzed from the site. <br /> Analytical results of soil samples are summarized on Table 1. The laboratory report(AAL Order No. <br /> A99121704) and chain-of-custody forms are included in Appendix B. <br /> 5.0. SUMMARY AND CONCLUSIONS <br /> .a <br /> Based upon data collected from the site, AGE concludes the following: <br /> - Petroleum hydrocarbons were detected in probing B1 at depths of 10 and 15 feet bsg at <br /> concentrations of 11,000 ppm and 760 ppm, respectively. Hydrocarbons were not detected <br /> Advanced GeoEnvironmental,Inc. <br /> ,r <br />