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20 September 2000 <br /> . AGE-NC Project No 97-0333 <br /> ' Page 5 of 11 <br /> ' of 25 feet bsg from bonngs MW-2 and MW-3 and at a depth of 30 feet bsg from boring MW-4 <br /> Ground water levels were measured at approximately 17 feet bsg utilizing a Solinst water level <br /> meter Boring logs are included in Appendix A, general hthology beneath the site is depicted in cross <br /> sectional views A -A 'and B - B'on Figures 3 and 4, respectively <br /> 23 FIELD EVIDENCE OF HYDROCARBON-IMPACTED SOIL <br /> Faint to intense petroleum hydrocarbon odor was encountered in the 15-, 20-, 25- and 30-foot soil <br /> ' samples collected from soil borings MW-1, MW-2, MW-3 and MW-4 <br /> Organic vapor(detected with a FID) was encountered in soil sample duplicates collected from soil <br /> ' bonngs MW-1 and MW-2 at depths between 5 feet bsg and 30 feet bsg, and from MW-3 and MW-4 <br /> at depths between 15 and 30 feet bsg <br /> ' <br /> 24 ANALYTICAL RESULTS OF SOIL SAMPLES <br /> ' . A Intal of seventeen soil samples were submitted to a DHS-certified laboratory for analysis of TPH- <br /> g, BTEX, MTBE, FTBE, TAME, DIPE, TBA, 1,2-DCA, EDB, methanol and ethanol TPH-g was <br /> ' detected in soil samples collected from bonngs MW-1, MW-2 and MW-4 at concentrations as high <br /> as 85 mg/kg, however, the laboratory reported that unmodified or weakly modified gasoline was <br /> significant <br /> ' BTEX compounds were detected in soil samples collected from MW-1, MW-2 and MW-4 at <br /> concentrations as high as 6 7 mg/kg, the greatest benzene concentration was detected at 25 feet bsg <br /> ' from boring MW-4 at a concentration of 1 1 mg/kg <br /> MTBE was detected in soil samples collected from MW-1, MW-2 and MW-3 at concentrations <br /> ranging as high as 100 rng/kg TAME was detected in soil samples collected from honng MW-1 at <br /> concentrations as high as 1 10 micrograms per kilogram (ug/kg) <br /> No other fuel components were detected by laboratory analysis The analytical results of selected soil <br /> samples are summanzed in Table I The laboratory reports (McCampbell Analytical Inc Lab I D <br /> No 42400 through 42413, 42559, 42560 and 42561) and chain-of-custody forms are included it, <br /> Appendsv F <br /> 1,hrec soil samples (i1v1W:)-5, MW5-15 and MW5-25) \vcre submitted Cot lahoiatory analysis of <br /> :)ermcablilty poruslty, IT101stuiL dild Lata; Ulga,]iL L01acnt Analy-,,s of'V W5-5 (silty sand; } cici�u <br /> Adiair,id( 4-011%11onimnIaI !ni <br /> 1 <br /> 1 <br />