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San-Joaquin County DIRECTOR <br /> t1 RN Donna Heran;REHS <br /> Environmental Health Department <br /> ASSISTANT DIRECTOR <br /> - G <br /> Laurie Cotulla, REHS <br /> Q � 600 East Main Street <br /> ;i Stockton, California 95202-3029 PROGRAM COORDINATORS� <br /> • E Carl Bergman, REHS <br /> 'C. Mike Huggins, RENS,RDI 99' <br /> Website: www.sjgov.org/ehd Margaret Lagorio,REHS <br /> Phone: (209)468=3420 Robert McClellan,REHS r <br /> Fax: (209)464-0138 Jeff Carruesco, REHS,RDI <br /> Kasey Foley, REHS <br /> ULTRAMAR INC <br /> 685 WEST THIRD STREET SEP 2 5 2007 <br /> HANDFORD .CA 93230 <br /> SAYED & ZAKIA ABDELWAHED <br /> 740 WEST OAK ST <br /> STOCKTON CA 95203 <br /> Re: ZE AUTO REP AIR(ABDELWAIdED FACILITY/ULTRAMAR NO. 13792) <br /> 2255 SOUTH AIRPORT WAY <br /> STOCKTON, CA 95206 <br /> WORKPLAN: Letter Work Plan for Additional Subsurface Investigation DATED: May 17,2007 <br /> PREPARED BY: Horizon Environmental,Inc. <br /> APPROVED (See Conditions Below) <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN (H&S 25296.10,subd.(c)(3).): <br /> 1. Drill and sample two 8-inch diameter soil borings and.convert to monitoring wells NIW, 9 and M%V-10. <br /> Soil boring for MW-9 is to be advanced on-site to approximately 88 feet below surface grade(bgs). <br /> Screen interval for M\V-9 shall be approximately 83 to 88 feet bsg;depending on lithology,to evaluate <br /> the vertical extent of the plume. Soil boring for M V-10,is to be advanced off-site to approximately 55 <br /> feet bgs to evaluate the lateral extent of the plume down-gradient.Screen interval for M%V-10 <br /> proposed to be screened across water table. <br /> 2. Soil samples will be collected a five-foot intervals beginning at a depth of 5 feet bsg as described in the <br /> workplan. <br /> to <br /> COMMENTS AND CONDITIONS: .°ti�' � <br /> L Begin implementation of the proposed work (installation-cif-SAW-2)by November 1,2007, <br /> 2. Report for installation of sparge well SW-2,which took place on January 29,2007,has not been <br /> submitted to Geotracker. Submit report for installation of SW-2.to Geotracker by October 15,2007. <br /> 3. The dissolved plume offsite should be delineated north and south of MW-6 to validate the plume <br /> model and ensure the down-gradient wells are near the plume axis. <br /> 4. Submit an Environmental Health Department(EHD)well permit application,$89 permit fee,and <br /> $294.00 inspection fee. Once the well permit has been approved,notify RHD of the proposed <br /> schedule for the work. Provide the EHD a minimum 48-hour notice prior to initiation of any field <br /> work on the site. <br /> REASONS FOR DISAPPROVAL OF THE WORKPLAN(H&S 25296.10, subd.(c)(3).): <br /> None <br /> DATED September 24,2007 BY <br /> c: CRWQCB,Central Valley Region—James L.L. Barton,PG <br /> c: Horizon Environmental,Inc.—Rexford K. Smith,PG <br /> I <br />