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K 16 ft/day <br /> k = --- _ ------------ = 4 57 ft/day <br /> P 35% <br /> Velocity, v, can then be calculated using the following equation <br /> v = ks <br /> where s is the slope Using a slope of 0 0029, as calculated from March 1994 monitoring <br /> data, the velocity is <br /> V = (4 57ft/day)(0 0029) = 0 0133 ft/day or 4 84 ft/yr <br /> This velocity is probably a very low estimate, based upon incomplete data from the PES <br /> pumping test <br /> 3.2.3 Microbiological Movement in Groundwater <br /> The bacteria used by GeoAudit are motile and can move in any direction in water, including <br /> upgradient However, movement rates will be influenced by two factors 1) groundwater flow <br /> rate and, 2) hydrocarbon availability <br /> Flow rate becomes a factor in microbiological movement when groundwater velocity is very <br /> high The calculated velocity (Section 3 2 2) is very low and would not have much effect on <br /> microbiological movement <br /> A more important factor in microbiological movement is "food" source (hydrocarbon) <br /> availability The bacteria used for inoculation will migrate in all directions following available <br /> hydrocarbons Movement, or migration, of bacteria in the saturated zone is very similar to <br /> movement in the vadose zone As long as significant concentrations of hydrocarbon are <br /> available, the bacteria will remain viable and will theoretically consume an entire <br /> groundwater plume <br /> The pilot study indicated that the bacteria migrated in the soil at least 5 feet in 60 days This <br /> calculates to a migration rate of at least 30 feet per year Using this conservative estimate, <br /> if bacteria are inoculated into the proposed wells (Section 3 2 1), groundwater at the site <br /> should show significant improvement within 3 months and should be remediated within one <br /> year <br /> 3.3 Blower System Modifications <br /> Currently, a low pressure blower is available to provide oxygen (in the form of air) to VW-1 <br /> I through VW-7, MW-3, MW-4, MW-5 and MW-14 At the present time, MW-14 is the only <br /> air-infected well that contains water The air is infected into the top of each well A sampling <br /> Geo$4-1 mdu S.—I., <br /> 1,53,+C bo.hrMp/ <br />