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TUH 06 '90 16:21- Ht I B[ NUE P.31/5 <br /> Ms. Eleanor Ratliff App1406 Gootechnufogy Iret. <br /> San Joaquin Local Health District <br /> June 8, 1990 <br /> Page 2 <br /> The grout pipe method of well abandonment will be used, as follows: <br /> o The existing well casing or drive point will be overdrilled with a drill <br /> rig equipped with contirtious-flight, hollow-stem auger and extrar.tpd <br /> from the borehole. <br /> o The borehole will then be filled by tremmie methods with 9-sack neat <br /> cement with less than 5 percent bentonite as the hollow stem auger cas- <br /> ing is being withdzawn. Care will be taken to keep the discharc <br /> ge. end of <br /> the trommie p:po submerged in the grout to avoid breaking the seal while <br /> filling the annular space, <br /> Environmental samples of soil and groundwater at the new well locations will <br /> take glace as outlined in our April 17, 1990 Work Plan. <br /> We trust this information will expedite the permit process. <br /> Sincerely, <br /> APPLIED GEOTECFer <br /> C. <br /> Vincent Lascko <br /> Associate Engi <br /> JFD/VPL/cgl <br /> enclosure <br /> cc: Mr. Stan Oleksy; U$G Corporation. <br />