Laserfiche WebLink
1 <br />' 31 March 2004 <br /> AGE-NC Protect No 03-1077 <br />' Page 5 of 7 <br />' sand and fine- to medium-grained sand were identified at depths of between 65 and 75 feet bsg and <br /> between 90 to 100 feet bsg In. addition, the CPT-generated logs suggest the presence of significant, <br /> laterally discontinuous sand lenses at depths of between 19 and 24 feet bsg in bonng CPT-3 and at 10 <br />' feet bsg and between 26 and 28 feet bsg in boring CPT-4, and a laterally-continuous, gravelly sand at <br /> between 110 and 115 feet bsg CPT computer-generated boring logs are included in Appendix A, soil <br /> boring logs are provided in Appendix B <br /> I <br /> 3 2 LABORATORY RESULTS OF GRAB GROUNDWATER AND SOIL SAMPLES <br />' A total of eleven grab groundwater samples and thirty-nine soil samples were collected from the soil <br /> borings and submitted for laboratory analysis for the constituents listed in Section 2 3 <br /> 3 2 1 Soil Samples Analytical Results <br />' TPH-g was detected in twelve of the thirty-nine soil samples analyzed The highest TPH-g <br /> concentrations were reported in samples collected from CPT-4, ranging from 408 milligrams per <br /> kilogram(mg/kg)in sample CPT-4-40 to 9,110 mg/kg in sample CPT-4-75 TPH-g was detected in only <br /> one of the twelve samples collected from CPT-2, at a concentration of 88 mg/kg (CPT-2-75) <br /> Various BTEX compounds were detected in eighteen soil samples, the highest BTEX concentrations <br /> were reported in samples collected from CPT-4,at 25 3 mg/kg benzene(CPT-4-80),208 mg/kg toluene <br /> (CPT-4-75), 71 8 mg/kg ethylbenzene (CPT-4-75) and 455 mg/kg xylenes (CPT-4-75) BTEX <br /> I (ethylbenzene) was detected in only one of twelve samples collected from CPT-2, at a concentration <br /> of 0 0049 mg/kg <br /> I MTBE was detected in one soil sample from CPT-3 and two samples from CPT-4 at concentrations of <br /> 1 8 micrograms per kilogram(µg/kg) (CPT-3-50), 72 µg/kg(CPT-4-85) and 68 µp/kg(CPT-4-90) <br /> The vertical distribution of TPG-g concentrations in soil is depicted in cross sectional view A-A' <br /> (Figure 4) The laboratory report (Associated Laboratories Lab I D 120408) Quality Assurance and <br /> Quality Control (QA/QC) report and chain-of-custody form are included in Appendix C Analytical <br /> Iresults of the CPT soil samples are suimmanzed in Table 1 <br /> 3 2 2 Grab Groundwater Analytical Results <br /> TPH-g was detected in all grab groundwater samples except CPT-2-94-98, at concentrations ranging <br /> g <br /> between 104 micrograms per liter(µg/1) and 15,200 µg11 <br /> IAdvanced CeoEnvironmentai,Inc <br /> I <br />