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GeofogicalTerk�cicslxc. "�..�'` <br /> �. Page 10 <br /> Interim Remedial Action Plan <br /> Project No.622.2 <br /> March 28,2005 <br /> 4.2 Plume Control <br /> This effort to control the groundwater plume is both an interim remedial action and an <br /> r ongoing pilot test. to determine aquifer response to pumping. The data generated by field <br /> L• monitoring will be analyzed by constructing time-drawdown graphs. The variables used in <br /> the common aquifer testing formula can be obtained from the graphs. The exact equations <br /> that will be used and hence the corresponding graphs are not known at this time because it is <br /> unknown if the aquifer test will reach steady state conditions. However, a "Discussion of <br /> = Applicable Equations" is included in Appendix B. x <br /> In the event that a cone of depression p with a large radius develops due to the groundwater <br /> extraction from EW-1, the data will also be analyzed by distance-drawdown methods. To use <br /> distance-drawdown accurately, the cone of depression must reach at least three observation <br /> wells that are located at three different distances from the extraction well. <br /> The data that is generated will be used to complete the site conceptual model and for <br /> preparation of the final Corrective Action Plan (if necessary). <br /> L <br /> 5.0 SCHEDULE AND REPORTING <br /> O NG <br /> r; Upon system installation and startup, an interim progress• report will be submitted to <br /> �— SJC/EHD. This report will cover the dual phase system installation and details pertaining to 1 <br /> the initial radius of influence testing. Recommendations for system improvements will be <br /> made if necessary.' } <br /> Proposed Schedule of Work <br /> The proposed schedule for the interim remedial work is as follows: <br /> Task Description Completion Data <br /> • Submit Interim Remedial Action Plan April 2005 <br /> • Receive approval for the RAP June 2005 <br /> • Prepare budget/USTCFP three bid process July 2005 <br /> • Submit SJVUAPCD permit applications August 2005 <br /> • Award Bids/Order Remedial Equipment September 2005 <br /> • Installation & startup of remedial system November 2005 <br /> • Perform remedial effectiveness testing December 2005 <br /> 0 Prepare interim progress report January 2006 <br />