ARCHIVED REPORTS_XR0010597 - Laserfiche WebLink

Home Browse Search

i I23 March 2001 • AGE-NC Project No 95-0130 Page 4 of 6 i diesel range and oil range compounds (no recognizable pattern), the laboratory reported the four sample chromatograms from P-12 as having significant gasoline range compounds i TPH-mo was detected in two water samples collected from P-11 at depths of 92 to 95 feet bsg at a concentration of 620µg/1 and at a depth of 117 to 120 feet bsg at a concentration of 390 µg11 i BTEX compounds were not detected in any of the five ground water samples collected between 20 and 120 feet bsg in bonng P-10 Various BTEX compounds were detected in four water samples collected from P-11 at depths of 41 to 44 feet bsg, 57 to 60 feet bsg, 92 to 95 feet bsg and 117 to 120 i feet bsg at concentrations as high as 140,ug/l, the greatest benzene concentration was detected in the sample collected between 117 and 120 feet bsg at a concentration of 140 4g/1 Various BTEX compounds were detected in five water samples collected from P-12 at depths of 17 to 20 feet bsg, i 43 to 46 feet bsg, 64 to 67 feet bsg, 93 to 96 feet bsg and 116 to 119 feet bsg at concentrations as high as 2,100 4g11, the greatest benzene concentration was detected in the sample collected between 17 and 20 feet bsg at a concentration of 2,100 µg/1 iMTBE was detected in four water samples collected from P-10 at depths of 20 to 23 feet bsg, 45 to 48 feet bsg, 61 to 64 feet bsg and 88 to 91 feet bsg at concentrations as high as 22µg/1, in one water lie sample collected from P-11 at depths of 57 to 60 feet bsg at a concentration of 1 4 µg/1, and in two water samples collected from P-12 at depths of 17 to 20 feet bsg and 43 to 46 feet bsg at iconcentrations as high as 12 µg/1 1,2-Dichloroethane (1,2-DCA)was detected in one water sample collected from P-11 at a depth of i 117 to 120 feet bsg at a concentration of 2 1 µg/1 and in one water sample collected from P-12 at a depth of 116 to 119 feet bsg at a concentration of 3 9 µg/l i No other petroleum hydrocarbon constituents or fuel oxygenated compounds were detected by the laboratory analyses The laboratory reports(McCampbell Analytical Inc Lab ID's 57626-30, 57680- 84 and 58054-58) and chain-of-custody forms are presented in Appendices B, C and D Analytical i results of the ground water samples are summarized in Table 1, analytical results of CPT "grab" ground water samples collected in January 2001 and morutoring well ground water samples collected on 13 December 2000 are depicted in cross sectional views D-D'and E-E' (Figures 5 and 6) i 3.0. SUMMARY AND CONCLUSIONS iThe implications of the January 2001 CPT investigation results are as follows iPermeable lrthology consisting of gravel, fine to coarse sand was encountered at depths • between 35 and 47 feet bsg, 62 and 65 feet bsg, 90 and 108 feet bsg and 116 feet bsg to iAdvanced GeoEnviron mental,Inc i