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altogether prevented. <br /> Corrective Action: Revise the text to state the emission reduction more accurately. <br /> 100. Section 8.5.4 <br /> The text states that the only intrusive work would be the monitoring of the wells. <br /> However, the installation of the extraction and injection wells will be intrusive. <br /> Corrective Action: Add the installation of the wells as intrusive work. <br /> 101. Section 8.7.2 <br /> The text states that biotreatment has only been demonstrated in pilot scale and "not <br /> in full scale." Is the accuracy of this statement certain? <br /> Corrective Action: If it is not known that biotreatment has been demonstrated in <br /> "full scale" treatment, then revise this statement. <br /> 102. Section 8.10 <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-* to 1x10-6. <br /> 103. Table 8.1-1 <br /> a. Under alternatives 1 and 2, regarding long-term effectiveness, a more <br /> definitive statement is needed on the evaluation of these alternatives. <br /> Corrective Action: Include a statement that these alternatives do not meet the <br /> criterion. <br /> b. Under alternative 3, regarding long-term effectiveness, the text states a <br /> "concern" about the effectiveness of the pump and treat method, but does not <br /> explain the concern. <br /> Corrective Action: Either explain the concern or delete the reference. <br /> C. Under alternatives 3 and 4, regarding short-term effectiveness, the text refers <br /> to construction but not to implementation of the remedy. <br /> Corrective Action: Add the text "and implementation" to the text after the <br /> word "construction." <br /> EGA/R9 June 7, 1993 23/40 <br />