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M23 December 2005 AGE-NC Project No 00-0769 Page 5 of 8 ' collected from wells MW-1, MW-2B, MW-3B, MW-4A and MW-5A at concentrations ranging Ibetween 6 4 pg/l (MW-1) and 140 4g/1 (MW-2B) r3 2 2 Hydrogeologic Unit 2 I Ground water samples from wells MW-2A,MW-3A,and"B"wells MW-413 through MW-913 were collected from HU-2 (112 feet to 125 feet bsg) TPH-g was detected in all ground water samples except MW-2A, MW-8B and MW-913 at r concentrations ranging from 600 pg/1 (MW-7B) to 20,000 µg/l (MW-3A) (Figure-8) , ' BTEX compounds were detected in all samples except MW-2A,MW-813 and MW-913 at maximum concentrations of 4,700 µg11 benzene and 3,000 V,g/l toluene In sample MW-413, and 500 µg/l ethylbenzene and 2,530 pg/1 total xylenes In sample MW-3A ' The fuel additive 1,2-DCA was detected in the samples collected from wells MW-3A, MW-413, MW-513, and MW-613 at concentrations ranging from 3 9 µg/l (MW-5B) to 130 µg/1 (MW-4B) lie TAME was detected In the ground water sample collected from wells MW-3A, MW-4B, MW-5B and MW-613 at concentrations ranging between 2 5 µg/l (MW-5B) and 160 µg/l (MW-4B) 3 2 3 g H dro eolo lc Unit 3 Y g , Ground water samples from"C"wells MW-4C through MW-9C were collected from HU-3(140 feet to 160 feet bsg) ' TPH-g was detected In all ground water samples except MW-8C-and MW-9C at concentrations ranging from 220 µgll (MW-6C) to 1,600 pg/l (MW-4C) (Figure 9) ' x ' BTEX compounds were detected in all ground water samples except MW-8C and MW-9C, the maximum concentrations were detected In sample MW-4C at 330 µg/l benzene, 220 µg/l toluene, ' 140 µg/1 ethylbenzene and 158 µg/1 total xylenes ' h The fuel additives 1,2-DCA and TAME were detected only in sample MW-4C at concentrations of ' 17 µg/1 and 5 7 µg/1, respectively s ' Advanced GeoEnvironmental,Inc 1 +5 '