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Bioremediation Pilot Test Results - 4 - 3 ,June 1994 <br /> Geweke <br /> TABLE 4: ANALYTICAL RESULTS OF AIR SAMPLES - TPH as gasoline and BTE&X <br /> Air samples were collected for laboratory analysis of TPHg and BTEX from MWl, MW4, MW 14, <br /> VWI, and VW4 every other week for two months. These samples were collected to determine if <br /> hydrocarbon vapor concentrations were being reduced. <br /> Observations and Comments: <br /> 1. Only one sample was collected from VW4 - not enough samples to determine any trends. <br /> 2. In the other four wells, BTEX concentrations were variable but generally increasing and <br /> TPHg concentrations went up during the monitoring period. <br /> 3. Insufficient data were collected to formulate any conclusions or show trends. <br /> TABLE 5: ANALYTICAL RESULTS OF WATER SAMPLES - Dissolved OZ and CO2 <br /> Ground water samples were collected once from MW4, twice weekly from MW14 in February and <br /> March, and twice weekly form EWl in late February and March. MW4 went dry after the first <br /> sample was collected. The samples were analyzed for OZ and CO2. These samples were collected to <br /> determine if byproducts of bacterial activity may be detected. <br /> Observations and Comments: <br /> 1. In EWI, concentrations of both 02 and CO2 did not show trends either up or down. <br /> 2. One sample in MW4 is not adequate to show any trends. <br /> 3. In MW14, the concentration of 02 did not show a trend, while the concentration of CO2 <br /> increased. <br /> 4. The increase in CO2 may signal bacterial activity, however, not enough samples were <br /> collected for adequate conclusions. <br /> TABLE 6: (Field Analysis of Air Samples - O= and CO2) <br /> Air samples were collected with field instruments twice a week beginning in January 1994 and <br /> continuing to the end of the pilot study in March. All wells in the vicinity (VW2, VW3, VW7, <br /> MWl, MW3, MW5, MW14, and EW1) and the inoculated wells (VWl, VW4, VW5, VW6, and <br /> MW4) were sampled. These samples were collected to determine if the byproducts of bacterial <br /> metabolism may be detected. These samples were easily collected and less expensive than the <br /> samples sent to the laboratory (See Table 3). <br />