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31 October 2011 AGE-NC Project No. 99-0682 Page 7 of 9 of extracted ground water could be costly. Further, costs for ground water disposal, following treatment, would increase with the amount of ground water extracted. 4.0. SELECTION OF REMEDIAL TECHNOLOGY & SCOPE OF WORK Based on the above evaluation of remedial technologies, it is AGE's opinion that the best available technology to remediate residual hydrocarbon impact to "drowned" soil and ground water at the site is a form of Fenton's Reagent. Prior to design of a full scale remedial action plan, AGE isrecommending performance of a limited ISCO pilot test utilizing a solution o45% hydrogen peroxide and common muriatic acid. Results from the pilot test would be use�to evaluate f e overall pe ormance of the selected technology and to design a full scale application plan of the proposed media. For the pilot test, AGE proposes to apply a hydrogen peroxide and acidified solution to the historically highest impacted wells MW-1A (shallow zone plume) and MW-8 (intermediate zone plume) by gravity feeding techniques. The following is a breakdown of the scope of work to be performed before and during the pilot test: • Procurement of the necessary materials to perform the injection, including media; • Performance of four weekly injection events utilizing wells MW-1A and MW-8 as dedicated injection points; • Performance of progress monitoring and sampling; and • Preparation of a report on the results of the ISCO feasibility study. 4.1 . ISCO PILOT TEST Upon regulatory approval, AGE will conduct four weekly ISCO applications utilizing wells MW-1 A and MW-8 and a 5% solution of hydrogen peroxide (possibly with ferrous sulfate) and an optimum pH (3-5) adjuster, using muriatic or s� u— Ifunc acid (1% acid). Baseline/background sampling will be performed using wells MW-1A and MW-8 and downgradient compliance wells MW-6 (shallow zone) and MW-7 (intermediate zone) prior to the first injection application. Progress/confirmation sampling will be performed using wells MW-1A, MW-6, MW-7 and MW-8 once following the second proposed injection event and following the fourth and final event. Field parameters and laboratory samples will be collected and analyzed as described below: Advanced GeoFnvironmental,Inc.