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,40 101September 1999 <br /> AGE-NC-Project No. 98-0440 <br /> ,Page 3 of 4 _ r <br /> water monitoring event is depicted in Figure 3: ' <br /> 1 <br /> Ground water monitoring data collected in the area-of wells MW-1,;.MW-2,' M_ W-3.and MW-4 <br /> indicated a ground water flow direction generally toward the north-northwest at a gradient of 0.01 <br /> ft/ft, or approximately 53 feet per mile (Figure 3): <br /> 3.2: LABORATQRY'RESULTS OF GROUND WATER'SAMPLES <br />' A total of four ground water samples were submitted to a DHS-certified laborator .in Jun <br /> y e,1.999. " . .' <br /> TPH-g was detected in the water sample collected from-. 'ell MW-2 at-.a concentratio' 230 <br /> micrograms per liter-(4g/1); the laboratory.,reported ihat'unmodifed or weakly'modi#ied gasoline in'. <br /> 1 this sample was•significant. TPH-d was detected in therourid water sample g p e com <br /> llected fro 'MW-2 <br /> at a concentration 6f.54. 0µg/l; the laboratory reported,that the diesel chromatograms for the samples <br />' did not have typical diesel characteristics. <br /> 1 Benzene ,and xylene were detected in the groundwater sample,collectedfrom well MW-2 at <br /> US concentrations of 27 and 3.9 ,ug/l, respectively. <br /> MTBE�was not-detected above laboratory reporting-limits for any of the analyzed samples utilizing <br /> EPA Method's 8020 and 8260. No other fuel oxygenated additives were detected above laboratory <br /> reporting limits from the analyzed samples. ; <br /> Anal 'tical results 'of the ground Ovate'r`samples-are''sumiharized in,Table 2.^Copies of the"laboratory - <br /> reporis.(McCampbell Analytical Inc. Lab I.D. 13 163 through--13 1'66) 'and chain-of-cusfody forms <br /> are presented in Appendix B. <br /> 4:0. DISCUSSION AND,CONCLUSIONS <br /> Based upon data-coIlected during the June 1999 monitoring event,'AGE concludes: <br /> Ground water monitoring data•colle'cted in the area of wells`MW=1 through'MW-4 indicated <br /> . <br /> that•the.ground water flow direction was generally toward the northwest at a gradient of 0.01 <br /> I ftlft,:or approximately 53 feet per' mile."Due to the low gradient at the site, sligla'variations <br /> in ground water measurements orchanges of recharge/discharge of the local'ground water <br /> could greatly modify groundwater flow direction. <br /> Ground water-elevation a t.the'site,.decreased an average 0.32 feet between the January' 1999.. <br /> and the June 1999 ground water monitoring events. <br /> AdraywedGmEn•ironmen In1,Inca ' <br />