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S E C O R <br /> Ms Margaret Lagorio <br /> May 2, 2005 <br /> Page 3 <br /> It should be noted that wells MW-2 and MW-3 are screened in Sand A,while well MWO-1X <br /> is screened in Sand B. During constant rate pump tests in MW-2 and MW-3, wells MW-1, <br /> MW-6, MW-03, and MW-01 can be monitored, as well as MW-2 or MW-3. Combined these <br /> data will provide sufficient information to estimate aquifer parameters for Sand A. Because <br /> well MWO-1X is the only well screened in Sand B, there are no other wells that can be <br /> monitored for the purposes of estimating aquifer parameters in Sand B. Therefore, during <br /> the constant rate pumping test wells in Sand A will be monitored to determine whether or <br /> not the two aquifers are connected. However, information will not be sufficient to determine <br /> Sand B aquifer parameters. <br /> Task 4: Data Analysis and Reporting <br /> When the test is completed, SECOR will submit a report that calculates aquifer parameters <br /> for Sand A, evaluates potential connectivity between Sand A and Sand B, and assesses <br /> whether groundwater extraction would be a feasible and cost-effective interim method for <br /> controlling MTBE migration from the Site. If groundwater extraction is found to be a <br /> feasible interim remedial alternative, SECOR will develop a subsequent work plan for <br /> designing, permitting, constructing, operating, and evaluating a groundwater extraction <br /> system. <br /> Schedule <br /> SECOR anticipates completing this work within six weeks of approval of this work plan. <br /> Thank you for your continued oversight in this matter. We realize this work plan is relatively <br /> general and would welcome your comments and suggestions. If you have any questions or <br /> comments, please feel free to contact Todd Sax (916) 861-0400 x246 or Michael Stephens <br /> at (916) 861-0400 x300. <br /> Sincerely, <br /> SECOR International Incorporated <br /> Todd Sax, D.Env. <br /> Senior Scientist <br /> 0�A) <br /> Michael Stephens, CEG, .HG, REM (✓� <br /> Sacramento West Region Manager <br /> cc: Lori Rowe <br /> Dalwinder Dhoot <br /> JTP_IRAP_V01.doc CADocuments and Settingsusax\My Documents\05-04\Joe's Truck Stop\I RAP\JTP_IRAP_V01.doc <br />