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1 <br />' 30 December 2002 <br /> • AGE-NC Project No 02-0450 <br />' Page 4 of 7 <br />' in a chilled container and transported under chain-of-custody to CTEL The samples were analyzed <br /> for the same petroleum hydrocarbon products listed In Section 3 2 <br />' 4.0. FINDINGS <br />' The stratigraphy and groundwater hydro geology underlying the site was characterized from the field <br /> descriptions Contaminant impact to ground water and soil samples was assessed by laboratory <br /> analysis <br /> 41 STRATIGRAPHY <br />' Fill material consisting of well compacted clay and silt was encountered from surface grade to <br /> approximately 10 feet below surface grade(bsg) Reddish-brown,brown,gray or gray-green silt and <br />' clay were generally encountered between 10 feet and approximately 25 feet bsg, interbedded with <br /> the silt and clay in the area of boring B2 were thin, laterally discontinuous fine sand layers at <br /> Iapproximately 10 feet to 12 feet bsg and 25 feet to 26 feet bsg(Figure 3) <br /> Gray to dark gray coarse sand was encountered at approximately 25 feet bsg in borings B1 and B2 <br /> I and between 25 and 30 feet bsg in boring B3, the coarse sand was poorly-graded with the exception <br /> of the one well--graded sample at B3-25 Bluish-gray to gray-green clay underlies the sand, from <br /> approximately 30 feet bsg to the total depth of the borings <br /> IHydrocarbon-like odor was detected in soil samples collected above from borings B1 and B2 from <br /> 10 feet to 35 feet bsg and B3 from 25 feet to 35 feet bsg In addition,organic vapor was detected by <br /> the OVM in soil samples collected from all three bonngs at concentrations as high as above the <br /> OVM's maximum detection limit of 2,000 parts per million(ppm)in samples B 1-20,B 1-25,B2-15, <br /> B2-20, B2-25, B3-30 and B3-35 <br /> A strathgraphlc cross section is depicted in Figure 3 The soil boring logs are provided in <br /> Appendix A, organic vapor field measurements are included on the bonng logs <br /> 4 2 HYDROCARBON-IMPACTED SOIL <br />' A total of six soil samples were analyzed for the petroleum hydrocarbon products listed in <br />' Section 3 2 <br /> • TPH-g was detected in soil samples collected from all three borings at a maximum <br /> concentration of 22,000 milligrams per kilogram (mg/kg), In sample B2-15 <br /> ' Advanced GeaEnvirvnmental,Inc <br /> I <br />