Laserfiche WebLink
i <br /> I01 November 2000 <br /> AGE-NC Project No 95-0173 <br /> IPage 4 of 6 <br /> I 1,2-DCA, EDB,methanol, ethanol, TBA, DIPE, ETBE,TAME and MTBE by EPA Method <br /> 8260 Modified <br /> 3.0. FINDINGS <br />' The soil description from MW-13 was utilized to augment geologic cross section A-A' at the site, <br /> field data was utilized to select soil samples for laboratory analysis Petroleum hydrocarbon impact <br /> I to saturated and unsaturated soil was assessed and quantified by laboratory analysis Laboratory <br /> analysis detected TPH-g, TPH-d and BTEX compounds in seven of nine soil samples analyzed, fuel <br /> oxygenated compounds were not detected in any soil samples <br /> I <br /> 31 STRATIGRAPHY <br /> A brown, damp, medium dense to dense, silty fine sand was encountered at depths of 10 and 15 feet <br /> bsg A pale brown, damp, very stiff to hard, clayey silt was encountered at 20 feet bsg A gray- <br /> brown,moist to saturated,medium dense to dense, silty fine sand was encountered at depths between <br /> 25 and 75 feet bsg A brown, saturated, hard, clayey silt was encountered between 80 and 100 feet <br /> bsg <br /> Saturated soil was generally encountered at 25 feet bsg in boring MW-13, ground water levels were <br /> measured at 25 feet bsg utilizing a Solinst water level meter Boring logs are included in Appendix <br /> A General lithology beneath the site in cross-sectional view is depicted in Figure 4 <br /> 3 2 FIELD EVIDENCE OF HYDROCARBON-IMPACTED SOIL AND GROUND WATER <br /> Petroleum hydrocarbon odor was detected in soil sample duplicates collected from soil boring <br /> MW-13 at depths between 25 and 75 feet bsg <br /> 3 3 AlVALY1IClA1T1.�IN EJVL1J Vl JWL i JAlV11�LES <br /> A total of nine soil samples were submitted to a DHS-certified laboratory for analysis of TPH-g, <br /> TPH-d, BTEX and fuel oxygenated compounds TPH-g was detected in soil samples collected from <br /> MW-13 at depths between 25 and 95 feet bsg at concentrations as high as 740 milligrams per <br /> kilogram(mg/kg), TPH-d was detected at concentrations ranging as high as 190 mg/kg,however the <br /> laboratory reported that the TPH-d sample chromatograms as not having a typical diesel pattern <br /> IAdvanced GeoEnvi ran mental,Inc <br /> I <br />