Laserfiche WebLink
' ENVIROLOGI1 <br /> TECHNOLOGIES, INC. <br /> Sampling Regime. The on-site wells (MW-1R, MW-2R, MW-3R, MW-5, and <br /> MW-14) were sampled pnor to installation and on a quarterly basis for BTEX <br />' (EPA Method 8020), dissolved oxygen (Hach Field Kit), pH (field meter), <br /> conductivity (field meter) and bacterial analysis (AWWA 9215C) following <br /> installation of ORC (refer to Figure 1) Groundwater samples were analyzed for <br /> the parameters outlined in Table 1. <br /> + + + �+ <br />' + + + <br /> r-{r If <br /> . ' I + <br /> L ki + <br /> + + . + <br /> l <br /> FIGURE 1. ORC Boring Locations <br />' RESULTS <br />' Distribution of Dissolved Oxygen. Dissolved oxygen has been detected in only <br /> two monitoring wells MW-3R and MW-4 MW-4 is an upgradient control well <br /> Dissolved oxygen in MW-4 averaged 2 6 ppm with very little fluctuation in <br /> concentration MW-3R, however, is located on the downgradient edge of the <br /> containinant. plume Concentrations in this well have varied from <0 2 ppni <br />' <br /> (November 25, 1995)to 12 ppm (June d, 1995) <br /> No detectable concentrations of dissolved oxygen have been observed in <br /> any of the other monitoring wells It appears that the oxygen is being uttlized by <br />' hydrocarbon degrading bacteria and other natural aquifer process prior to reaching <br /> these wells Increased biological activity within the aquifer supports this <br /> . interpretation <br /> >=I ' d dZE = 90 66-b1 -m00 <br />