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N _ i 13 March 2012 AGE-NC Project No . 99-0682 Page 3 of 5 1 proposed full application, a minimum 50 gallons of 35% hydrogen peroxide will have been mixed with 350 gallons of water (creating a 5% mixture above ground). The treatment volume of water combined with the created above ground solution forms a dilute solution of hydrogen peroxide. The well volume for well MW- 1A is approximately 2. 3 gallons of waterand the well volume for well MW-8 is approximately 6. 8 gallons of water. The volume of reagent used represents the delivery of one container of 35% hydrogen peroxide. Within the aquifer it is suspected an equal volume of water (350 gallons) will be treated surrounding each well. However, the exact molarreaction is not certain; nor a requirement based on the over abundance of petroleum-impacted ground water; and further will be ,evaluated based on analytical results of ground water samples. On 15 February 2012, ground water samples were collected from wells MW- 1A, MW-2, MW-6, MW- 7, MW-8 and MW-10 and analyzed fordissolved iron and alkalinity. Procedures from monitoring and sampling were outlined in email correspondence with EHD dating 24 January 2012 (Appendix C) . ( Dissolved iron)was reported in wells MW- 1A, MW- 7 and MW-8 at concentrations of 1 . 02 milligrams per liter (mg/I), 0. 315 mg/1 and 0. 061 mg/l. Wells MW- 1A and_MW 8 are proposed as the injection wells for the pilot test. Based on the dissolved iron analytical data from the proposed injection wells it does not appear that the addition of iron to the solution \ is necessary. \4. If Fenton 's Reagent is to be used , note the addition of acid is necessary to start the reaction only, and should not be administered throughout the test. As stated above, AGE has proposed a modified Fenton 's system and not Fenton 's Reagent. AGE recommends that the acid be used throughout the test to maintain lowered pH conditions and to aid in the protonization of the naturally occurring dissolved iron. During each subsequent proposed injection event, and prior to mixing of the hydrogen peroxide/acid solution, AGE will take pH measurements from each well proposed for injection to determine if the use of acid is required to maintain the lowered pH conditions. 5 . If acid is to be used , baseline alkalinity measurements must be taken to determine the amount of acid that would be necessary to reduce the pH level to the appropriate level to maintain solubility of the iron . Hydroxyl radicals may also be scavenged in the presence of highly alkaline water, so this needs to be known to determine the amount of reactants needed . Advanced CeoEnvironmental, Inc.