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I <br /> . 26 February 1996 <br /> AGE-NC Project No 95-0125 <br /> Page 5 of 6 <br />' are summarized in Table 2 The laboratory report (Alpha Analytical Laboratory batch No 95-1020- <br /> 023) and chain-of-custody are presented as Appendix C <br /> 43 ANALYTICAL RESULTS OF EXCAVATION SOIL SAMPLES <br /> TPH-g was detected in soil samples collected from the sldewalls of the excavation at concentrations <br /> as high as 1,600 ppm(7-East) Toluene, ethyl benzene and xylenes were detected in excavation soil <br /> samples at concentrations ranging from (toluene, 3-East) to 100 ppm (xylenes, 7-East) <br /> 1 Benzene was not detected in any of the samples collected Analytical results of excavation soil <br /> samples are summarized on Table 3 The laboratory report (Castle Analytical Laboratory No 627-6S <br /> Ithrough -10S) and chain-of-custody are presented as Appendix D <br /> 4 4 ANALYTICAL RESULTS OF STOCKPILE AND PURGE WATER SAMPLES <br /> TPH-g was detected in stockpiled soil samples at concentrations up to 480 ppm (SP3) BTE&X <br /> were detected in stockpiled soil samples at concentrations up to 13 ppm (erre', SP2) No � <br /> hydrocarbons were detected in samples collected from the purged water Analytical results of <br /> stockpile and purged water samples are summarized on Table 4 The laboratory report (McCampbell <br /> Analytical laboratory No 60245 through 60252) and chain-of-custody are presented as Appendix E <br />' 5,0. CONCLUSIONS AND RECOMMENDATIONS <br /> I5 1 HYDROCARBON-IMPACTED GROUND WATER <br /> Based on the detection of TPH-g in ground water samples collected from MW-2 and MW-6, the <br /> current extent of dissolved petroleum hydrocarbons in ground water appears to be limited to a <br /> relatively small area in the vicinity of those wells Wells MW-2 and MW-6 have most consistently <br /> contained detectable concentrations of dissolved hydrocarbons <br /> Between June and October 1995, dissolved petroleum hydrocarbon concentrations decreased in MW- <br /> 2 and increased in MW-6 Additional monitoring and sampling of these wells should be conducted <br /> prior to determining any need for remediation We recommend scheduling the next quarterly <br /> monitoring for March 1996 <br /> 5 2 HYDROCARBON-IMPACTED SOIL <br /> Approximately 370 cubic yards of impacted soil were removed during the December 1995 excavation <br /> of the former UST area However, analytical results of soil samples indicated that hydrocarbon- <br />