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Mr. Swaran Chouhan �+ <br /> 701 E. Charter Way, Stockton <br /> Page 2 of 2 <br /> suitable for maintaining bentonite seal integrity through the vadose (unsaturated) <br /> soil zone, EHD cannot approve installation of additional multilevel wells on or <br /> near your site at this time. Please submit a work plan addendum by 01 May 2006 <br /> for nested or clustered wells to continue the lateral delineation of your dissolved <br /> plume. The sentinel well(s) can be included in this work plan. <br /> The Central Valley Regional Water Quality Control Board (CVRWQCB) is now <br /> requiring an evaluation of the potential for vapor intrusion into buildings from <br /> contaminants escaping soil or groundwater. Please submit a preliminary <br /> evaluation of the potential for vapor intrusion of nearby buildings from your soil <br /> and/or dissolved plumes by 01 June 2006. <br /> Implement the approved portions of this work plan within 60 days of the date of <br /> this letter. Submit a well permit application with the required $89.00 permit fee and <br /> $297.00 inspection fee ($386.00 total) for each parcel. Copies of access <br /> agreements and encroachment permits are required to also be submitted for <br /> wells and borings advanced off your site. Provide EHD with a minimum 48-hour <br /> notice prior to initiating any field work. <br /> Questions or comments may be directed to Nuel Henderson by mail (address on <br /> letter head) or by telephone at (209) 468-3436. <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> t <br /> Nuel C. Henderson, Jr., PG Margare Lagorio, REHS <br /> Engineering Geologist, Unit IV Supervisor, Unit IV <br /> cc: James L.L. Barton - CRWQCB <br /> Dr. Calvin Lee —AGE <br /> Mark C)wPn-. — .qtatP Clpnniin Rind <br />