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�I <br /> Y R.M . B. Garage (Erardi Ventures) Page 2 of 2 <br /> f 715 North Hunter Street 24 July 2009 <br /> Stockton , CA <br /> monitoring wells MW- 12 and MW-7 should include analysis for PCE and TCE . In order to <br /> detect migration of the PCE/TCE plume in a timely manner, return these two wells to a <br /> quarterly monitoring schedule upon reinitiating the DPE system operation . Should it <br /> become apparent that operation of the DPE system is inducing migration of the <br /> dissolved PCE/TCE plume , the GWE portion of the DPE system should be terminated <br /> I <br /> and an alternative remedial technology evaluated and proposed to continue groundwater <br /> remediation. <br /> If you have any questions , please contact Frank Girardi at (209) 953-7868 or Nuel <br /> Henderson at (209) 468-3436 . <br /> Sincerely, <br /> / <br /> Nuel C . Henderson , Jr. , PG Marga�io, REHS <br /> Engineering Geologist Program Coordinator <br /> C: James Barton , RWQCB , 11020 Sun Center Dr. #200 , Rancho Cordova , CA 95670 <br /> Tim Cuellar, AGE , 837 Shaw Road, Stockton , CA 95215 <br /> Directive Letter 0709 <br />