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I v ' <br /> I,I'18 April 2003' 'I ' <br /> ' <br /> t AGE-NC Protect N6,97-0333 <br /> F I ,I,Page 8 of 11', 0I <br /> have typical gasoline patterns ;Based on further laboratory review' of these TPH-g sample <br /> chromatograms,the laboratory further indicated to AGE that the TPH-g chromatogram peaks were <br /> possibly the result of solvents (i e PCE and TCE) I <br /> I I � ' � � � � 'I <br /> TPH'I�d was'detected in water samples collected from wells MW-2, MW-5, MW-6, MW-7 (C-F), <br /> MW-8 (A-B, D-F), MW-9 (A-B), MW-10 (A-F), MW-11(A-E) and MW-12 (A-C) and MW-13 <br /> i <br /> (A-E)at concentrations as high as 45,000µg/l(MW-6) The laboratory reports noted that the TPH-d <br /> sample chromatogram from wells MWi 2 and MW-6 did not have typical diesel patterns and lighter <br /> hydrocarbons were present (I e gasoline) <br /> I I <br /> BTEX <br /> constituents were detected in'water samples collected from wells MW-2,MW-6, MW-7(B-` <br /> D, F),MW-9 (A-B), MW-10 (A, E)and MW-11D The greatest benzene was detected in the water , <br /> � sample collected from monitoring well MW-6 at a concentration of 17,000 µg11 I ' i i , I , i , I ` <br /> MTBE (utilizing EPA Method 8260M) was detected in water samples collected from monitonng` <br /> ' wells MW'1 through MW-4,MW-6,MW-7(A-F),MW-8 (A-C),MW-9(A-B),MW-10A,MW-1I <br /> MW-12 (A-C), MW-13 (A-LB) at concentrations as high as 74,000 µg/1 (MW-2), <br /> isoconcentratlon maps displaying the estimated extent of dissolved MTBE in First Zone and Second <br /> tZone aquifer are depicted in Figures 8 and 9 <br /> 1 1 i 1 i <br /> TAME was detected in water samples collected from monitoring wells MW-1, MW-2, MW-3,E <br /> 'I I MW-6 and MW-7,(A, C} at concentrations as high as 810 µg/1 (MW-2), 1,2-DCA'was detected in <br /> If water samples collected from monitoring wells MW-7 (B-D), MW-8 (B-D), MW-10 (A-C), w <br /> MW,11A and MW-12B at concentrations as high as 5 '4 µg/l(MW-813) I i <br /> I ► <br /> I <br /> PCE and/or TCE were detected in water samples collected from monitoring wells MW-1, MW-3, <br /> ' MW-4, MW-5, MW-7 (A-F), MW -8 (A-F),MW-9 (A-D), MW-10,(A-E),MW-11 (A-F),MW-12 I I <br /> (A-E) and MW 13 (A-E) at concentrations as high as 2,700 µg/1 (MW-4) Isoconcentration maps <br /> displaying the estimated extent of dissolved PCE in First Zone and Second Zone aquifer are depicted <br /> ,, <br /> in Figures 10 and 11 '' I,I r <br /> I ,, I <br /> ' <br /> ,I I <br /> Cis 11,2-DCA was Idetected in water samples collected from monitoring wells MW-4,MW-5,MW-7 I <br /> ',(B-D)", MW-8 (A-D);l MW-9 (A, B),, MW-1,0 (A'C),,MW-11 ,(A, 'C,]D) and 1MW-12 (B,C) at,' i 'a <br /> concentrations'as'high as"18µg/1 (MW-7B) <br /> ' <br /> 1 I I , , ' I ' <br /> No other constituents 'of concern were detected above laboratory reporting limits m the 'water`` E <br /> f samples collected during the fourth quarter 2002 sampling event Analytical results of ground water <br /> F monitoring well samples are summarized in Tables 3 and 4 The laboratory reports(Castle Analytical', <br /> Laboratory Reference No )'and chain-of-custody forms are presented m Appendix E <br /> I <br /> I' a I <br /> I r Advanced GeoEnvir6rimental,�Inc <br /> n 14 <br />