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J�. <br /> f <br /> 1J <br /> 44 <br /> GOLDEN GRAIN 1OMP <br /> 989ANY <br /> December 21, <br /> -- 202/799-5045.06 <br /> 6. <br /> If biological treatment is used, hydrocarbons would be <br /> destroyed. <br /> 7. Moderate installation costs. <br /> Groundwater Extraction and Treatment Disadvantages: <br /> n , for water-bearing zones of low permeability <br /> Not ideal <br /> 22 to 25 feet- <br /> such as the clay layer at <br /> itting for water discharge. <br /> 2. Requires perm <br /> 3. Requires continued monitoring <br /> after installation. <br /> 4. Does not treat nydrocarbona in the overlying soil. <br /> h operation and maintenance costs. <br /> 5, Moderate to hig <br /> appears to be a viable remediation <br /> Groundwater extraction app e slug tests conducted <br /> technique at this site. The results of w pumping rate (less than <br /> in November 1989 indicate that a very low p p g hydraulic <br /> m my be adequate to achieve by <br /> 5 gallons per minute [gP ]) a (Appendix V) . <br /> control of the hydrocarbons plume at this site <br /> due to the very small groundwater gradient <br /> This is largely a relatively small groundwater treatment <br /> present. Accordingly, prioreat water to <br /> system could easily be constructed <br /> to ttions (air stripping, <br /> discharge. An analysis of treatment op biological treatment) and <br /> _ carbon adsorption, or aboVe-g' ound <br /> discharge points (sanitary sewer, storm sewer, or re- <br /> discharge <br /> would be performed in the next phase of work. <br /> GROUNDWATER <br /> TECIINOLOGY,INC. <br />