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~ A WGERAGHT Y <br /> Ar& MILLER, INC. <br /> AWEnvironmental Services <br /> a heidemij company <br /> 1 PM% #Em <br /> January 5, 1996 4 V LJ- <br /> Project No. RC0309.004 n k Ella <br /> Ms. Mary Meays JAN 081996 <br /> San Joaquin County Environmental Health Division <br /> 304 East Weber Avenue, P.O. Box 388 ENVIRONMENTAL HEALTH <br /> Stockton, California 95201=388 PERMIT / SERVICES <br /> SUBJECT: Well Drilling Permit Application and Revised Site Plans,Chevron Service <br /> Station#9-4275,2905 West Benjamin Holt Drive, Stockton,California. <br /> Dear Ms. Meays: <br /> Enclosed you will find the well drilling permit application for the remediation wells to <br /> be installed as part of the implementation.of the Work Plan for Soil and Groundwater <br /> Remediation Services dated August 31, 1995 (Work Plan). Also enclosed are revised figures <br /> as requested during our meeting on December 8, 1995. <br /> The attached well drilling permit application.is for the installation of six vapor- <br /> extraction wells and ten air-sparging wells, as described in the above-referenced Work Plan. <br /> These wells will be installed in a total of six soil borings, the locations of which are shown on <br /> the well permit application and on the attached-revised figures. Two of the six soil borings will <br /> be double-completion wells,consisting of one vapor-extraction well and one air-sparging well. <br /> The other four soil borings will be completed with two air-sparging wells and one vapor- <br /> extraction well each. The soil borings for the four triple-completed wells will be constructed <br /> using 12-inch-diameter augers. The soil borings for the two double-completed wells will be <br /> constructed using 10-inch diameter augers. As we discussed during our meeting on December <br /> 8th, Geraghty &Miller may request that some additional wells be permitted, depending on the <br /> field results of these soil borings and well installations. For this reason, we will verify your <br /> availability to issue additional permits during the field activities. <br /> The enclosed set of revised figures replaces Figures 1 through 4 of the Work Plan. The <br /> revision to Figure 1 consisted of modifying the location of the site arrow to show the site <br /> being north of West Benjamin Holt Drive. The revision to Figure 2 consisted of adding <br /> Monitoring Well MW-9 to the figure and indicating that Monitoring Well BHD-1 was a <br /> GM RICHMOND.DATA:CHEVRON:WEVN-ZWBEWAM:WELLDRLG:WlPWApp.doc A <br /> 1050 Marina Way South•Richmond, California 94804•(510) 233-3200-FAX (510) 233-3204 �.J <br />