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13 September 2012 AGE-NC Project No.99-0682 Page 10 of 17 4.2.2. Progress-ISCO: Analytical Results - 07 June 2012 On 07 June 2012, groundwater samples were collected from wells MW-1 A, MW-6, MW-7 and MW-8. The following is a summary of the analytical results: • TPH-g were detected in the samples collected from wells MW-1A, MW-6, MW-7 and MW-8 at concentrations between 260 Ng/I (MW-6) micrograms per liter (pg/1) and 93,000 pg/1 (MW-1A). • TPH-d were detected in the samples collected from wells MW-1A, MW-7 and MW-8 at concentrations between 1,230 pg/I (MW-7) and 29,000 pg/I (MW-1 A). • One or more BTEX compound was detected in samples collected from MW-1A, MW-6, MW-7, MW-8 at maximum concentrations of 820 pg/I benzene (MW-7), 5,400 pg/I toluene (MW-1A), 780 pg/I ethylbenzene (MW-1A) and 4,500 pg/I total xylenes (MW-1A). • TAME was detected in samples collected from well MW-7 at a concentrations of 7.0 pg/l. • 1,2-DCA was detected in samples collected from wells MW-7 and MW-8 at concentrations of 13 pg/I and 11 pg/I, respectively. • Various metals were detected in samples collected from wells MW-1A, MW-6, MW-7, and MW-8; Fe and Al increased significantly in samples collected from well MW-8 compared to baseline concentrations, while concentrations of Fe decreased in well MW-1A compared to baseline results. CrVI and Cr were not detected above laboratory reporting limits in the samples collected (Table 4). • Anions (bromate, bromide, chloride, nitrate, nitrate as nitrogen, nitrate as NO3 sulfate, ammonia, and TDS) were detected in the samples collected from wells MW-1A, MW-6, MW-7 and MW-8. Generally, anion concentrations decreased (bromate and bromide) or remained stable in MW-1A; increased slightly (bromate and bromide) or remained stable in MW-6 and MW-7, and increased in MW-8 compared to baseline concentrations (Table 5). 4.2.3. Progress-ISCO: Analytical Results - 21 June 2012 On 21 June 2012, groundwater samples were collected from wells MW-1A, MW-6, MW-7 and MW-8. The following is a summary of the analytical results: • TPH-g were detected in the samples collected from wells MW-1A, MW-6 and MW-7 Advanced GeoEnvironmen[al,Inc.