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r <br /> _ . <br /> Zj <br /> MR.WMIPI <br /> µ <br /> Mr.Clint Rogers <br /> Scplember 11, 1891 <br /> Fagg 3 <br /> x <br /> nctl8ed and collodion of this water was scheduled for August 1991,failowing the routine monitoring and <br /> aampling adivlty scheduled for July 25,1991. The monitoring and sampiing report of this activity of July <br /> 2S, 1991, Is pending. <br /> r <br /> A 2-foot-thick layer of hydrated bentonite pellets was placed from 30 to 28 feet below grade,above the <br /> filter pack,and the well was sealed to grade with cement grout. The wellhead was equipped with a 1 <br /> locking cap and encased In a traffic-rated street box Calcium chloride was mtxed with a thickened <br /> cement slurry to promote rapid setting of the concrete encasing the surface traffic street box. This was <br /> done In consultation with Mr.Knoll of the SJCEHD In an effort to avoid damage to the wellhead by <br /> E vehWar traffic. <br /> Fd1mving Installation.Me new mons odng well(MW-4)was surveyed on July 25, 1991. The surveyor's <br /> [ map,Including eisvatlon and horizontal distance data,Is attached(Attachment E). <br /> The reads of the laboratory analyses performed on the sol sample collected from tho sol boring,anc. <br /> the composite sample collected from the three drums of soli were below the method detection limits <br /> (MDL)for TPI -as-gasdlne and for OTEK Based upon the composite sample laboratory results,verbal <br /> approval was given by the SZCEHD on August 8, 1991,to spread the drill cuttings at the alts. <br /> if you have any questions or require additional Information,please call our Concord at <br /> (510)671-2387. <br /> Sincerely, <br /> GROUNDWATER TECHNOLOGY,INC. <br /> i�red on <br /> Project G logisi <br /> Sandra Project Man"sayageer Q�QFESS <br /> e <br /> 000 .tin � .� z <br /> Professional EngineerIvo. 'ec? rM <br /> No.C4a= <br /> I <br /> FH:aLLIh <br /> CIVIL <br /> 114��\P <br /> ! »ntachrtwO <br /> nts CALIF <br /> :: f =:•tJ�oleuf� , <br /> GROUNDWATER <br /> TECHW-OCY,INC. <br />