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• • Mr. Brian Taylor <br /> O November 9, 2007 <br /> CONESTOGA-ROVERS <br /> &ASSOCIATES <br /> Page 4, Item 8: "The pump lodged in the bottom of MW-1 may be an impediment to achieving higher <br /> extraction rates from this well. Based on the impending evaluation of remedial technologies, it is now <br /> appropriate to determine whether removal of the pump or replacement of the well will enhance the <br /> proposed remedial strategy for this SA." <br /> Response: Because well MW-1 is constructed as a monitoring well, it is unlikely that this well would be <br /> used for the proposed DPE testing. As shown on Figure 10 of the FS, a DPE well is proposed near well <br /> MW-1, and this well's construction will be determined following the proposed source area definition <br /> activities. It is likely well MW-1 will be replaced or used as an observation well during the proposed <br /> DPE pilot testing activities <br /> CLOSING <br /> Shell is prepared to submit the Remedial Action Plan (RAP) as proposed in the FS. The RAP will <br /> provide the necessary details for source area definition and pilot testing activities. As discussed in Item <br /> 7, a work plan addendum will also be submitted that addresses modifications to the deep zone assessment <br /> activities. <br /> Shell trusts that the responses provided within this letter adequately address RWQCB staff comments to <br /> the FS,however,if this is not the case, then Shell would like to schedule a meeting with RWQCB staff in <br /> order to resolve any of these issues. <br /> If you have any questions regarding this letter,please call Jeff Gaarder at(707)933-2362. <br /> Sincerely, <br /> Conestoga-Rovers & Associates <br /> Jeff Gaarder <br /> Pro' ct Manager NAW �Cis <br /> Joe W.Neely,PG No. 6927 <br /> �P <br /> Sri OF CAL\F�? <br /> 1729 G <br /> Worldwide Engineering, Environmental, Construction, and IT Services <br />