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Geofogical e,Thnics Inc. <br /> ;,(cdaso,C°!lJ°mia 95351 _ <br /> 5386424/fa�tk53&5852 <br /> July 11, 1997 PAYMENT <br /> Project No.: 8.1.2 RECEIVED <br /> Project Name: BC&D Properties JUL 16 1997 <br /> Ms. Margaret Lagorio <br /> San Joaquin County PHS/EHD SAN JOAQUIN couNTr <br /> 304 Weber Ave. PUBLIC HEALTH SERVICES <br /> Stockton, CA 95202 ENVIRONMENTAL HEALTH DIVISION <br /> RE: BC&D Properties, 1129 W. Eleventh St., Tracy, CA <br /> Monitoring Well Abandonment Work Plan <br /> Dear Ms. Lagorio: <br /> Herewith follows the proposed protocol for abandoning the following wells at the BC&D Properties Site, <br /> 1129 W. Eleventh St., Tracy, CA. <br /> • MW-1, MW-2,MW-3,MW-4; these four monitoring wells are 2 inch diameter x 15 to 22 feet deep. <br /> The locations of wells are shown in Figure 1 Site Map. With the decommissioning of these four wells, <br /> this will complete the closure of this site and the termination of further groundwater monitoring. <br /> The following work will be performed by Geological Technics Inc. and V&W Drilling of Rio Vista <br /> C57#720904 (707-374-2815),owner-Robert Vickery. <br /> The following procedure will be followed for MW-1,MW-3 and MW-4: <br /> • The well boring and screen annulus will be via pressure grouting methods with neat cement slurry <br /> and allowed to mushroom over the top of the casing. <br /> • The monitoring well's traffic well box will be removed and the well boring will be drilled out to four <br /> (4)feet. <br /> • The excavation will be backfilled with clean fill material and capped with concrete finished flush to <br /> surface grade. <br /> Since there may still be some residual contamination present near MW-2 the abandonment procedure for <br /> this well is proposed as follows: <br /> • The well's traffic rated box will be removed. <br /> • The entire well will be over drilled to its total depth of 15 feet below ground surface. <br /> • The boring will then be closed by pumping a neat cement grout via a tremie tube from the bottom of <br /> the hole to displace water in the borehole. <br /> • A concrete cap will be added and finished flush to grade. <br /> This work will be scheduled immediately upon approval of the plan and approval of the project costs <br /> from the USTCFP. A well abandonment report will be submitted upon completion of the above work. <br /> Do not hesitate to call me if you have any questions. <br /> Si erely, 01V1g10N <br /> •✓` - Na►ENTT Wird Floor p1=0W <br /> O�YCAL TECN�CS 2N1�C. S. ,38g,A to on CA�j2 <br /> ynol 1. Kablanow II,Ph.D. R`Q _ v� <br /> RG#5234, HG#442 i ed [� <br /> cc: Mr.Robert J.Burick-BC&D Properties C,pnd ons <br /> Ms. Beth Thayer-CRWQCBCVR by <br /> 000 <br />