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' 17 August 1999 <br /> • AGE-NC Project No 97-0290 <br />' Page 3 of 4 <br />' (MSL) Ground water elevation decreased an average of 0 12 feet between 21 July 1999 and 17 May <br /> 2000 Ground water data is summarized on Table 1 <br />' The ground water flow direction was southerly with a gradient of 0 002 ft/ft The gradient of the <br /> ground water profile for the site appears to decrease at the northern edge of the site Ground water <br /> elevation contours based upon the data for the May 2000 monitoring event are illustrated on <br />' Figure 3 <br />' 32 ANALYTICAL RESULTS OF WATER SAMPLES <br /> TPH-g was detected in water samples collected from MW2, MW4 and MW7 at concentrations of <br />' 78,000 micrograms per liter (ygll), 3,500 4g/1 and 110 ,ug/l, respectively TPH-d was detected in <br /> samples collected from wells MW-2,MW-4 and MW-7 at concentrations of 990,ug/l, 1,800,ug/l and <br /> 100 4g/l, respectively <br />' BTEX compounds were detected in round water samples collected from wells MW-2,MW-4, MW- <br /> 7 and MW-8 at concentrations as high as 5,400 ug/l, 5,500 /,cg/l, 2,200 ,ug/l and 10,000 ug/l, <br />' respectively(MW2) Petroleum hydrocarbons were not detected in the samples collected from wells <br /> MW-3, MW-5 and MW-6 Only benzene was detected in wells MW-1 and MW-7 at a concentrations <br />' of 0 47 gg/l 0 75 ug1l, respectively <br /> Oxygenated compounds were not detected at or above laboratory reportinglimitsin the ground water <br />' samples collected from the site during the May 2000 sampling event <br /> Analytical results of all water samples collected at the site are summarized on Tables 2 and 3 The <br />' laboratory report (AAL Order No 00051904), chain-of-custody forms and QA/QC are included in <br /> Appendix C <br /> 4.0 SUMMARY AND CONCLUSIONS <br />' Based on the data collected from the site, AGE finds <br /> • Ground water was encountered in the monitoring wells at approximately 43 to 44 feet bsg <br />' and was inferred to have a southerly flow direction during the May 2000 monitoring event <br /> • The highest concentrations of petroleum hydrocarbons in ground water were detected in <br />' samples collected from wells MW-2 and MW-4 TPH-d was detected in wells MW-2,MW-4 <br /> and MW-7, at concentrations of 990 pg/l, 1,800 ugll and 100 ggll, respectively Only <br /> benzene was detected in well MW-1,at a concentration of 0 47µgll Petroleum hydrocarbons <br /> I <br />