Laserfiche WebLink
1 <br /> 23 March 2001 <br /> AGE-NC Project No 97-0343 <br />' Page 5 of 7 <br />' 3 2 GROUND WATER GRADIENT AND FLOW DIRECTION <br /> At the time of the January 2001 sampling event, depths to ground water in wells MW 1, MW2 and <br /> MW3 ranged from 48 97 feet to 49 45 feet below the well heads Ground water elevations at the site <br /> ranged from 23 58 feet below mean sea level (MSL) In well MW1 to 23 61 feet below MSL in well <br /> MW3 (Table 1) Ground water elevations at the site decreased an average of 0 19 feet since the <br /> October 2000 monitoring event During this monitoring event, the depths to ground water in the <br /> wells were approximately 13 97 to 15 42 feet below the tops of the well screens, Indicating that the <br /> wells are screened properly and yield representative shallow ground water samples <br /> At the time of the February 2001 sampling event, depths to ground water In wells MW4 through <br /> MW7 ranged from 49 22 feet to 49 54 feet below the well heads Ground water elevations in these <br /> wells ranged from 23 37 feet below mean sea level (MSL) in well MW5 to 23 56 feet below MSL <br /> in wells MW6 and MW7 (Table 1) During this monitoring event, the depths to ground water in <br /> wells MW4 through MW7 were approximately 9 22 to 9 54 feet below the tops of the well screens, <br /> indicating that the wells are screened properly and yield representative shallow ground water <br /> samples <br /> lie The ground water flow direction was inferred to be flowing to the west at a hydraulic gradient of <br /> 0 001 feet/feet Figure 3 Illustrates the contoured ground water elevations as measured on <br /> 25 January 2001 <br /> 3 3 ANALYTICAL RESULTS OF SOIL SAMPLES <br /> A total of 16 soil samples were analyzed for TPH-g, TPH-d, BTEX, MTBE, EDB, 1,2-DCA and the <br /> suite of five fuel additives <br /> I None of the analytes were detected at or above laboratory reporting limits in the soil sample analysis <br /> The approximate extent of petroleum hydrocarbon-impacted soil is depicted on Figures 6 and 7 <br /> Analytical results of soil samples are summarized on Table 2 The laboratory reports (MAI Lab I D <br /> No 59583 through 59598), quality assurance and quality control (QA/QC) report and chain-of- <br /> custody <br /> hain-ofcustody forms are Included In Appendix E <br /> 3 4 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> TPH-g was detected in ground water samples collected from MW1, MW2 and MW3 at <br /> • concentrations of 2,200 ,ug/l, 12,000 µg/1, and 1,300 µg/1, respectively TPH-d was detected In <br /> Advanced GeoEnvxronmental,Inc <br />