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Discussion <br /> Conclusion: <br /> Dye injection returns from above the pump are evidence of flow intrusion, therefore, a conduit for introduction of mass from these depths becomes a <br /> possibility. Based on the zonal water quality analysis, nitrate is found throughout the well but concentrations do not vary significantly by depth. In <br /> comparison, TCE and cDCE show a large difference in zonal concentrations between samples taken below the pump and in the blank section above the <br /> pump. Nitrate concentrations are pervasively high throughout the well, indicating that not only enter through the open borehole but also through <br /> portions of the blank casing above the pump. Based on the limited knowledge of the subsurface and job site we surmise that widespread agricultural <br /> leachate is the source of nitrate in this well. <br /> The volatile organic carbons (VOC's) are only detected in significant amounts in the open borehole and very little to no contribution is seen from the <br /> blank screen sections above the pump. Based on characterization of the VOC's we see that the deepest formations in this well contain VOC's. It would <br /> not be unreasonable to assume a vertical flow gradient exists to some extent in the open borehole. However, we are not able to measure this <br /> component of the flow. <br /> VOC and nitrate concentrations in the open borehole are symmetrically distributed, below their respective MCL's, and are associated with 91% of the <br /> total flow. Nitrate concentrations are symmetrically distributed throughout the casing and borehole. This indicates that well modification is not viable <br /> for VOC or nitrate contamination at this time. <br /> BESSTINC. Flow and Chemistry Report well MW-3 4 <br /> CLOEWL 5UBURFACE 1,130 USG*min-1 <br /> TECHNOLMIES <br />