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� u <br /> 46 <br /> GOLDEN GRAIN COMPANY <br /> December 21, 1989 <br /> 202/799-5045.06 <br /> 4• Requires permitting for water discharge. <br /> 5. Feasibility study is required. <br /> 6. Potentia]. operation problems include well �lgplugging, <br /> transfer. <br /> nutrient sorption to sc . s, and poor oxyge <br /> At the present time, <br /> in situ treatment is not being con- <br /> sidered as the primary treatment method to remediate the site, <br /> ess, the presence of <br /> owing to the relative complexity of the proc <br /> SPP in the vicinity of the tank pit, and current understanding of <br /> the site. However, in situ treatment may be studied as an <br /> addition to a groundwater extraction system, and/or a vapor <br /> extraction system. Investigating this treatment option at a <br /> later date would allow time to better understand the site hydrau- <br /> lics (by running the groundwater axtracian system) before <br /> nutrients are introduced into the subsurface. once hydraulic <br /> control of the plume is achieved, and levels of hydrocarbons <br /> ° <br /> an in situ feasibility study might be performed to <br /> reduced, <br /> gather data on nutrient requirements, sorption rates, and per- <br /> gather <br /> allow determination <br /> oxide decomposition rates. These data woul <br /> of the potential effectiveness of in situ biodegradation as a <br /> supplemental treatment technique. <br /> GROUNDWATER <br /> TECHNOLOGY,INC. <br /> n <br /> 11521 <br /> . '�IIQIIlIR]IR -rimi�®9119T7CY <br />