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94. Section 7.4.2.6 <br /> The statement that "required permits are obtainable" is not relevant to this CERCLA <br /> remedial action since permits are not required. <br /> Corrective Action: Modify this sentence to read that the substantive requirements <br /> of permits can be met. <br /> 95. Section 7.4.2.7 <br /> It is not clear whether the cost estimate includes costs for monitoring the influent <br /> and effluent of the treatment system in order to assure that none of the potential <br /> contaminants will be returned to the aquifer. <br /> Corrective Action: Explain in the text how monitoring of the system's influent and <br /> effluent are included or explain why they arc excluded. <br /> 96. Section 7.4.2.9 <br /> The text states that "this alternative is expected to achieve full aquifer cleanup . . . <br /> however, this is not the objective of this remedial action. <br /> Corrective Action: Revise the text to say that this alternative is expected to reduce <br /> concentrations of TCE, PCE and DCE in the aquifer to levels within the acceptable <br /> risk range of 1x10-4 to 1x10-e. <br /> 97. Figure 7.3-4 <br /> This figure is not complete in that it does not include the two discharge mechanisms <br /> of injection and use of ponds. <br /> Corrective Action: Redraft the figure to include the two discharge mechanisms <br /> which are included as part of this alternative. <br /> 98. Section 8.3.1 <br /> The text implies that the aquifer is to be cleaned up to all health-based standards. <br /> However, this ROD establishes cleanup standards for the aquifer for only TCE, PCE <br /> and DCE. <br /> Corrective Action: Modify the text to state "cleaned up to the TCE, PCE and DCE <br /> MCLS . . ". <br /> 99. Section 8.5.3 <br /> The statement that "emissions of contaminants to the atmosphere will be prevented . . <br /> ." is not accurate. Air emissions will be minimized to near zero but will not be <br /> EDA/R9 June 7, 1993 22/40 <br />