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12 August 2009 <br /> AGE-NC Project No. 08-1633 <br /> Page 4 of 5 <br /> 3.2. ANALYTICAL RESULTS OF SOIL SAMPLES <br /> Twenty one soil samples from borings BI through B9 were analyzed for chemicals of concern <br /> (COC). <br /> TPH-d was reported in thirteen of twenty-one samples analyzed; concentrations ranged between 52 <br /> milligrams per kilogram (mg/kg; 133-20 and B7-2.5) and 5,900 mg/kg (138-5). BTEX constituents <br /> were not reported in any of the samples collected during site assessment activities. <br /> Analytical results of soil samples are summarized in Table 1.Laboratory reports(CTEL ProjectNos. <br /> CT214-0906018 and-0906048),quality assurance and quality control (QA/QC)reports, and chain <br /> of custody forms are included in Appendix C. A concentration map showing the lateral extent of <br /> TPH-d impacted soil is illustrated in Figure 3. <br /> 3.3. ANALYTICAL RESULTS OF GRAB GROUND WATER SAMPLES <br /> Two grab ground water samples were collected from within the presumed water table in borings B3 <br /> and 136; samples were analyzed for the constituents listed in Section 2.1.1. <br /> TPH-d was reported in water samples collected from B3 and B6 at 28% and 98%, which is <br /> approximately equivalent to 280,000,000 µg/1 and 980,000,000 µg/1. Free-phase petroleum was <br /> observed in both grab ground water samples. <br /> No additional target analytes were reported at or above laboratory detection limits in samples <br /> analyzed.Analytical results of ground water samples are summarized in Table 2.Laboratory reports <br /> (CTEL Project Nos. CT214-0906018). Hydrocarbon impact to ground water is illustrated on <br /> Figure 3. <br /> 4.0. CONCLUSIONS <br /> Based on the data collected at this site, AGE concludes: <br /> • TPH-d impacted soil was encountered in samples collected from borings B3, B6, and B8. <br /> The lateral extent of hydrocarbon-impacted soil is generally defined north of the suspected <br /> source area by boring B4 and south of the diesel AST by boring Bl. The TPH-d impact to <br /> soil appears to attenuate laterally away from source area, decreasing in samples collected <br /> from borings B5, B7 and B9. However, high concentrations of TPH-d were reported in <br /> Advanced GeoEnvironmental,Inc. <br />