ARCHIVED REPORTS_XR0008452 - Laserfiche WebLink

Home Browse Search

' 21 August 2000 • AGE-NC Project No 95-0104 Page 5 of 6 Organic vapor was detected In soil duplicates from probe boring P1 at concentrations as high as 1999 ' ppm (P1 at 20 through 35 feet bsg) PID data is Included on the boring logs (Appendix B) 34 ANALYTICAL RESULTS OF SOIL SAMPLES A total of six soil samples were submitted to a DHS-certified laboratory in July 2000 TPH-g,BTEX compounds, EDB, 1,2 DCA, and the five fuel oxygentates were not detected at or above laboratory reporting limits in any of the soil samples submitted for analysis rTPH-d was detected in four of the soil samples collected from probe boring P-1 at concentrations as high as 410 mg/kg(P1-25) TPH-d was not detected in soil samples collected from depths of 35 and 40 feet bsg however,the 45-foot soil sample contained TPH-d at a concentration of 18 mg/kg Analytical results ofthe soil samples are summarized in Table 3 The laboratory reports(McCambell Analytical Inc Lab I D No 43151 through 43162) and chain-of-custody forms are presented in ' Appendix D 4.0 DISCUSSION AND CONCLUSIONS Based on data collected during the June and July 2000 environmental activities, AGE concludes • Ground water flow direction in the area of MW-1,MW-5,MW-6, and VW-1 wasenerall g Y toward the southeast at a gradient of 0 07 ft/ft,or approximately 370 feet per mile(Figure 3) • Dissolved TPH-g and BTEX compounds do not appear to be significant in the area bound by wells MW-1, MW-5, MW-6 and VW-1 • Prior to initiation of the SVE pilot test,dissolved petroleum hydrocarbons detected in water samples collected from VW-1 indicated this well was within the dissolved petroleum hydrocarbon"core area" of the plume However, it appears that operation of the SVE pilot test has reduced dissolved petroleum hydrocarbons in the area of VW-1 to nearly non- detectable concentrations • Concentrations of TPH-g and BTEX compounds are below detection limits in the confirmational soil boring, Pl, advanced adjacent to VW-1 • TPH-d was detected at relatively low concentrations in probe boring P 1 • I Advanced GeoEnvironmental,Inc