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y ' <br /> Mr. Dave Lewis <br /> October 13, 1986 <br /> Page 6 <br /> pumping, water treatment, reinjection system would be used to <br /> contain the contaminant migration and provide a means for the <br /> introduction of nutrients and oxygen to the microbes in the <br /> contaminant plume. <br /> Groundwater Technology has conducted remediation projects <br /> using Enhanced Natural Degradation � in which aquifers contaminated <br /> with dissolved hydrocarbons have been restored to drinking water <br /> quality within a period of two years. The advantages of the <br /> END option include the following: in-situ breakdown of organic <br /> chemicals to carbon dioxide and water; limited disruption to <br /> existing businesses; and relatively rapid rate of complete <br /> aquifer restoration when compared to pump and treat alone. An <br /> estimated cost for the implementation of a END program is <br /> presented below. <br /> Option 4 <br /> Feasibility Study . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ 25,000.00 <br /> Full Scale END Program . . . . . . . . . . . . . . . . . . . . . . . . . . . .250,000.00 <br /> TOTAL $275,000. 00 <br /> The soil treatment options outlined above are presented as a <br /> preliminary review of the available methods for addressing the <br /> soil contamination at the study site. However, the most immediate <br /> concern is to continue the recovery of the free phase product and <br /> to achieve control of the dissolved plume to limit migration. if <br /> you have any questions or require additional information please <br /> call. <br /> Respectfully, <br /> GROUNDWATER TECHNOLOGY, _1NC. <br /> Robert W. Junc. <br /> Project Geologist <br /> Gary Taggaat� <br /> District Manager <br /> Certified Engineering <br /> t Geologist #1061 <br /> h _ <br />. RWJ:GBT:kmh <br /> cc : David Brent '' <br />