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Jeanine Jones 3 July 22 , 1986 <br /> further evaluation. It is essential for treatment purposes to <br /> have a clear picture of the extent of the soil contamination and <br /> the contribution it makes to the continuing degradation of the <br /> groundwater. <br /> If MCTC intends to propose extraction/treatment in its <br /> feasibility study to remediate the site, testing should be done <br /> such as soil sorption tests to evaluate the ability of hexavalent <br /> chromium to be reduced to the less mobile trivalent state. <br /> Further pump tests should be performed to estimate hydraulic <br /> characteristics in order to be able to evaluate the best <br /> alternative for remediating the site. Whatever testing methods <br /> are decided on, they should be described in the workplan. As <br /> mentioned at the last meeting, MCTC prefers to avoid an <br /> excavation alternative therefore, they will need to consider <br /> insitu treatment. For insitu treatment alternatives soil and <br /> groundwater data must be collected. The methods and tests must <br /> be proposed now, not during the feasibility study. <br /> MAR: jka <br />