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<br /> I,I'18 April 2003' 'I '
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<br /> t AGE-NC Protect N6,97-0333
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<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
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<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
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<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)
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<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
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<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
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<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
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<br /> in Figures 10 and 11 '' I,I r
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<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)
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<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
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