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DEC 08 '97 12:06 AT&T FAX 9020FX - P.3/3 . <br /> Mr. Dan Lapporte <br /> December 2, 1997 Project 22560-203.002 <br /> Page 2 <br /> three groundwater monitoring wells, MW-1, MW-2 <br /> ed by <br /> Pumping cemenVbentonite grout into the wells under pressure The grout wlebe ovum ed <br /> through a tremie pipe, backfilling the wells in one continuous operation from the bottom. <br /> The grout used to fill the well will be allowed to spill over into the excavation during the <br /> sealing operation, and fill it for a thickness of 1 foot and form a "cap" which has a <br /> diameter of at least I foot greater than the diameter of the originally drilled hole. After the <br /> sealing material has set, the excavation will be filled with clean soil. <br /> SCHEDULE <br /> EMCON will begin scheduling field activities immediately after receiving approval of the <br /> work plan by Chevron and the SJCPHS. Within I week of receipt of drilling permits from <br /> SJCPHS,EMCON will begin field activities. Field activities are anticipated to take I day. <br /> EMCON appreciates the opportunity to present this work plan and hopes we can be of <br /> continued service to Chevron. If you have any questions please contact Steve Strait. <br /> Sincerely, <br /> EMCON <br /> Steve Strait, C.E.G. <br /> Geoscienees Manager <br /> FRZ..'K:415DSTR DOC-97Vas,1 <br />