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i i i ti i i 19 January 2004 i 'AGE-NC Project No 96-0235 Page 5 of 8 t } No'vem'ber 2003 TPH-g was detected in the samples collected from MW-1,MW-2 and MW-10 at concentrations of 6,200 micrograms per liter(µg/1), 10,000 µg/1 and 670 µ.g/1, respectively TPH-d was detected in'--- ' sample collected from MW-2 at a concentration of,12 µg/1 3TEX compounds were detected in samples MW-1,MW-2 and MW-10 at maximum concentrations ' of 1,800 µg/1 benzene (MW-1), 270 µg/1 toluene (MW-2), 1,100 µg/1 ethylbenzene'(MW-2) and 1,900 µg/l xylenes (MW-2) 1 MTBE was detected in the water samples collected from MW-9, MW-10, MW-13B and MW-14B at concentrations ranging from 40µg/l(MW-13B)to 66µg/1(MW-9) Water samples analyzed from ' MW-2,MW-11B and MW-14B contained detectable concentrations of 1,2-DCA at 3 2 µg/1, 12 µg/1 and 27 µg/l,respectively Concentrations ofD1PE,ETBE,TAME,TBA and EDB were not detected above laboratory reporting limits in any of the water samples collected during the September 2003 ' monitoring event Analytical results of waterPsamples collected during the last two quarters of 2003 are summarized ' . on Tables 2AB and 3AB, analytical results from previous monitoring events are summarized on Tables 4 and 5 Figures 7 and 8 illustrate the September data's implication on ground water contamination plumes in upper and lower ground water intervals, respectively Figures 9 and 10 ' illustrate November data's implication on the ground water contamination plumes in upper and lower ground water intervals, respectively, tThe laboratory report (CTEI:Laboratory IDs 0309-076-1 through 0309-076-24), chain-of-custody i forms and the laboratory QA/QC report are included In Appendix C The laboratory report (CTELµ, Laboratory IDs 0311-090-1 through 0311-090-18), chain-of-custody forms and the laboratory , QA/QC report are included m Appendix C 1 4.0. SUMMARY AND CONCLUSIONS ' Based on the data collected in September from the former UST cluster area, AGE finds 1 , • The shallow-screened data delineate a radial ground water flow pattern, with a net flow ' towards the east at a gradient of 0 004 ft/ft,the deep-screened data delineated a ground water flow direction toward the east-northeast at a gradient of 0 001 ft/ft t • TPH-g was detected in ground water samples collected from MW-9, MW-10 and EW-1 at ' concentrations of 220 µg/1, 1,900 µg/1 and 42,000 µg/l,respectively TPH-d was detected in wthe sample collected from EW-1 at a concentration of 16 µgill Advanced GeoEnvironmental,Inc , 4 x