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1 <br /> 25 October 2005 <br /> . AGE-NC Project No 02-0926 <br /> Page 6 of 7 <br /> 1 , <br /> reports,and chain of custody forms are included in Appendix C Analytical results of the CPT grab <br /> ' ground water samples are summarized in Table 1 <br /> S <br /> 341 ANALYTICAL RESULTS OF SOIL SAMPLES <br /> Two soli samples were collected for laboratory analysis, one in the middle of HU2 (CPT3-65) and <br /> the other at the top of HU4 (CPT3-75) No petroleum hydrocarbons were detected at or above <br /> laboratory reporting limits The laboratory report (CTEL Project No CT214-0508166), QA/QC <br /> ' report, and chain of custody forms are included in Appendix C Analytical results of the CPT soil <br /> samples are summanzed In Table 2 <br /> 1 13 5 GEOTRACKER CONFIRMATIONS <br /> Documents confirming the upload`of laboratory electronic deliverable format(EDF)files and depth <br /> to water measurements to GeoTracker are Included in Appendix D <br /> ' 4.0. SUMMARY AND CONCLUSIONS <br /> • Generally,silt,clay, clayey silt,and silty clay were encountered in all three CPT soil borings <br /> from 5 feet bsg to between 42 feet and 48 feet bsg, with lenses of sandy material Identified <br /> ' in borings MW-3 and CPT-1 at approximately 25 feet and 29 feet,respectively Apparently <br /> continuous layers of sand, silty sand, sandy silt, and cemented sand were encountered at <br /> 44 feet to 50 feet bsg and 70 feet bsg Stiff, fine-grained material, Interbedded with silty and <br /> ' clayey sediments and lenses of sandy material,was identified from approximately 60 feet bsg <br /> to the total depths of the borings One soil sample, collected at 65 feet in CPT-3, was <br /> described as an olive brown, dry clay The computer-generated CPT lithologic logs were <br /> ' integrated with previous subsurface soil descriptions to develop a subsurface <br /> geologic/hydrogeologic model,the present model consists of seven informal zones,a vadose <br /> (unsaturated) zone and six hydrogeologic units <br /> ' Petroleum hydrocarbons were detected in grab ground water samples collected from boring <br /> CPT-3, adjacent to the former UST excavation area The lateral extent of petroleum <br /> ' hydrocarbon contamination is defined to the north by soil boring CPT-1 and well MW-2,to <br /> the northwest by well MW-1, and to the south by well MW-3 and boring CPT-2,the lateral <br /> extent appears undefined to the east and west of the former UST location <br /> ' The vertical extent of petroleum hydrocarbon-impacted ground water is undefined at the <br /> • former UST location(CPT-3) <br /> ' Advanced GeoEnvironmental,Iric <br />