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4 9 M <br /> (C) 1989 BTO NATIONAL CORPORATION <br /> 6.3 WITH THE INTRODUCTION OF MICROBE 3 AN.) WATER VAPOR A:, TH8 <br /> _. VITNTAG BIOWBLLS, Wis' AN11C1Il"ILTE TITS FOLLOWING; <br /> 6.3.1 During the initial period of treatment, the vapor extraction <br /> Element will dominate th3 area closest to the extraction wells. <br /> D,4'-ing this period, the treatment of extracted volatiles will be at <br /> its maximum. <br /> 6.3.2 As the microbes expand into the plume, drawn with water vapor <br /> toward the extraction wells, they will begin to remedz.:te from <br /> outside of the plume, and inward. <br /> 6.3.3 As remedlation progresses, the extraction of volatiles will fali off <br /> rapidly as the CO2 level increases. COx is a by-product of the <br /> bioremediation of hydrocarbons. A neutral biomass and water are <br /> the remaining in-ground con9tituents. <br /> 6.3.4 As the bioremediation process dominates volatiles extraction, there <br /> will be an ongoing monitoring of exhaust vapor, soil gas, volatiles <br /> and COz, pH, microbe and Nutrient levels until evidence of <br /> coripietion indicates time to perform confirmation borings. <br /> x. <br /> 9 HOLT805 <br />