Laserfiche WebLink
� M <br /> '3 <br /> 444 <br /> initiated. MTBE was detected in wells MW-2 and MW-3 at concentrations similar to last quarter. <br /> It <br /> MTBE was not confirmed in either of these wells by analysis by EPA Method 8260 per <br /> recommendations by Ron Rowe of PHS/EHD (Rowe 1996). No petroleum hydrocarbons were <br /> 1 detected in monitonng well MW-1. <br /> The analytical results of the analysis of groundwater samples for dissolved oxygen, carbon <br /> dioxide, alkalinity; nitrate, sulfate, and ferrous iron are summarized in Table 2. <br /> CONCLUSIONS <br /> Based on theresults of this quarterly monitoring and sampling, Smith Technology recommends <br /> continued ground1.water monitoring and sampling of wells MW-1, MW-2 and MW-3 in order to <br /> detect changes in groundwater quality beneath the site. <br /> With regard to the potential for bioremediation occurring at the site, carbon dioxide, nitrate, <br /> sulfate and total alkalinity levels do not indicate a clear pattern consistent with the distribution of <br /> petroleum hydrocarbons present in the wells. However, the December 1996 data indicates that <br /> within the plume 'dissolved oxygen levels decrease (indicating aerobic respiration) and Eh readings <br /> decrease and are negative (indicating anaerobic respiration). These trends indicate bioremediation <br /> is occurring in aerobic and anaerobic (possibly due to depletion of oxygen) environments. This <br /> can be verified with further groundwater monitoring at the site. <br /> I <br /> L <br /> { <br /> w:1951221Reportsl46MR1996.doe 5 <br /> Blau <br />