ARCHIVED REPORTS_XR0005431 - Laserfiche WebLink

Home Browse Search

i r18 December 1997 AGE-NC Project No 95-0173 IPage 7 of 10 I are summarized in Table No 3 The laboratory report(CAL Reference Numbei 1293) and cham-of- custody forms are presented in Appendix C Dissolved iron and manganese were detected from AW 1 A at concentrations of 0 33 parts per million (ppm, reported as milligrams per liter) and 4 4 ppm Analytical results of the selected ground water sample is summarized in Table No 5 The laboratory report (AAL Batch Number 97-1111-010)and Ichain-of-custody forms are presented in Appendix C 3 4 FIELD EVIDENCE OF HYDROCARBON-IMPACTED SOIL AND GROUND WATER Petroleum hydrocarbon odor was noted in soil sample duplicates collected from AW 1 at depths Ibetween 25 to 60 feet bsg, and from AW2 at depths between 35 to 75 feet bsg Organic vapors were detected (using a PID) at concentrations as high as 482 parts per million (ppm) from AW1, and at Iconcentrations up to 30 ppm from AW2 Ground water monitoring data indicated that ground water flow beneath the site was generally I toward the northeast at a gradient of about 0 005 ft/ft, or approximately 25 feet per mile Petroleum hydrocarbon odor was noted during ground water sampling activities from wells MW1 through MW4, MW6, MW9, VW1, VW2, AWIB and AW213 I 3 5 ANALYTICAL RESULTS OF SOIL SAMPLES A total of twelve soil samples were submitted to CAL for analysis for TPH-g, TPH-d, BTE&X, MTBE, TAME, ETBE, DIPE and TBA TPH-g was detected in soil samples collected from AW 1 I at depths between 40 and 75 feet bsg at concentrations up to 2,100 ppm, TPH-g was detected from AW2 at depths between 35 and 70 feet bsg at concentrations up to 56 ppm TPH-d was detected in soil samples collected from AW 1 at depths between 40 and 75 feet bsg at concentrations up to 1,500 ppm, TPH-d was detected from AW2 at depths between 35 and 60 feet bsg at concentrations up to 34 ppm The laboratory report indicated that the chromatograms of TPH- d are not consistent with typical diesel characteristics Benzene was detected in soil samples collected from AW 1 and AW2 at concentrations as high as 19 ppm, toluene, ethylbenzene and xylenes were detected in samples at concentrations up to 580 ppm The analytical results of selected soil samples are summarized in Table 4 MTBE was not detected in soil samples submitted for laboratory analysis utilizing EPA methods 8020 and 8260 D1PE, TAME, ETBE and TBA were not detected in selected soil samples utilizing EPA method IAdvancer!CeoEnvironmental,Inc f