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San Joaquin County DIRECTOR <br /> P.O. u ! N Donna Heran, REHS <br /> Environmental Health Department ASSISTANT DIRECTOR <br /> 600 East Main Street Laurie Cotulla, REHS <br /> f�mlll & Stockton , California 95202 -3029 PROGRAM COORDINATORS <br /> Carl Borgman, REHS <br /> • Mike Huggins, REHS, RDI <br /> Website: www.sjgov. org/ehd Margaret Lagerio, REHS <br /> i F o R Phone: (209) 468-3420 Robert McClellon, REHS <br /> Fax: (209) 464-0138 Jeff Carruesco, REHS, RDI <br /> Kasey Foley, REHS <br /> May 23 , 2008 <br /> Stephanie Furgal <br /> Chevron Environmental Management Company <br /> 6001 Bollinger Canyon Rd . , RM K2240 <br /> San Ramon , CA 94583 <br /> i <br /> l <br />'I Subject: Former Chevron #9-4054 Site Code: 1780 <br />'I 2103 Country Club Blvd , RO#: 0000635 <br /> Stockton , CA 95204 Global ID#: T0607700063 <br /> I <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Work Plan for Ground <br /> Water Assessment (Plan) dated May 5, 2008 prepared by Arcadis Consulting and offers the following <br /> comments. <br /> The Plan is in response to the requirement from the EHD to continue the subsurface investigation for <br /> vertical plume delineation , and includes the installation of five additional monitoring wells (MW4D onsite <br /> i <br /> and MW-9D, MW-12B, MW-12C , and MW-12D offsite) through steel conductor casings. <br /> The Plan is necessary and will be adequate [H&S Code 25296(c)(3)] with the following requirements <br /> included : <br /> Selected soil and initial ground water samples from each well are to be analyzed for tett-butyl <br /> alcohol (TBA) by EPA Method 8260B . <br /> Centralizers are to be installed at the bottom , middle, and close to the top of each steel conductor <br /> casing so that a minimal 2-inch grout annulus will be provided between the outer diameter of the <br /> conductor casing and the borehole. <br /> No addendum is needed for this phase of work as long as the above noted items are included in the work <br /> phase. ou may start procedures with ban Joaquin-Govnty-Public-Works=Department-to-secures tfae <br /> required encroachment permit(s) to install the wells in the county right of way. Please submit a copy of the <br /> encroachment permit(s) along with the two EHD Well Permit Application Forms and $89 fee each. <br /> You may contact Michael Infurna, Senior Registered Environmental Health Specialist, at (209) 468-3454 <br /> P; should you have any questions or wish to discuss the site. <br />`.I Donna HKma <br /> REHS, Director <br /> EnvironHealth De en <br /> z �r <br /> Mic ael Jr. , S Margaret Lagorio, REHS <br /> Senior Registered Environmental Health Specialist Program Coordinator <br /> III Ml/ <br /> c: Mr. James L Barton, - CVRWQCB, 11020 Sun Center Dr. , #200, Rancho Cordova, CA 95670 <br /> li Mr. David Evans - Arcadis, 950 Glenn Drive, #125, Folsom, CA 95630 <br /> Mr. John Craig - PO Box 691295, Stockton, CA 95269 <br /> Ms. Robin Ringstad - 2421 Franklin Ave, Stockton, CA 95204 <br /> f <br />