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13 July 2012 AGE-NC Project No.96-0236 Page 8 of 13 MW-2, MW-4, MW-9, DPE-1 and DPE-2 at concentrations between 3 pg/I (MW-2) and 140 pg/I (MW-4). • Various metals/anions were reported in all samples analyzed for these constituents and are summarized in Tables 4 and 5. Notably, hexachrome (CrVI)and chromium were not detected in any of the samples collected during baseline sampling. 4.2.2. Post-ISCO Injection Monitoring Event No. 1: Analytical Results On 25 April 2012, post injection ground water samples were collected from wells MW-1A, MW-2, MW4, DPE-1 and DPE-2 to evaluate the effectiveness of the ISCO pilot test. The following is a summary of the results: • TPH-g were detected in all five samples at concentrations ranging from 140 pg/I (DPE-2) and 300,000 pg/I (MW-4). • BTEX constituents were detected in all five samples at maximum concentrations of 17,000 pg/I benzene, 9,800 pg/I toluene, 3,300 pg/I ethylbenzene and 24,900 pg/I total xylenes (MW-4). • TAME and 1,2-DCA were detected in all five samples at maximum concentrations of 19 pg/I and 88 pg/I, respectively (MW-4). • Various metals/anions were reported in all five samples and are summarized in Tables 4 and 5. Notably, calcium, magnesium,sodium and iron generally increased in all sampled wells. Further, anions bromide, bromate, chloride nitrate as N, Nitrite as N, sulfate and ammonia decreased in all wells except DPE-2. Chromium and hexavalent chromium were not reported in samples collected during the 25 April 2012 post-ISCO monitoring event. 4.2.3. Post-ISCO Injection Monitoring Event No. 2: Analytical Results On 02 May 2012, post injection ground water samples were collected from wells MW-1A, MW-2, MW-4, DPE-1 and DPE-2 to evaluate the effectiveness of the ISCO pilot test. The following is a summary of the results: • TPH-g were detected in all five samples at concentrations ranging from 1,000 pg/I (DPE-2) and 280,000 pg/I (MW-4). • BTEX constituents were detected in five samples at maximum concentrations of Advanced GeoEnvironmental,Inc.