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Mr Harlin Knoll March 20, 1995 <br /> Page 2 <br /> * First, the monitoring welts will be tremie grouted with neat cement to remove the <br /> groundwater <br /> • The well casings will then be pressurized to complete the well destruction The <br />' grout will be mixed at a proportion of one bag of cement to 5 to 10 gallons of <br /> water with a maximum of 3 to 5 percent bentonite <br />' 0 After grouting and pressurizing the well casings, the upper 2 to 3 feet of the wells <br /> will be drilled out to provide a 2-foot vertical distance from the ground surface to <br /> accommodate future grading The resulting cavity will then be backfilled with <br /> bentonite slurry or surrounding soils <br /> Soil Exploration Services (C57 No 582696) will perform the well destruction under the <br /> t observation of Mittelhauser and a representative of SJCPHS - Environmental Health <br /> Division Physical safety hazards associated with drilling equipment and pressure grouting <br /> will be addressed In the Site Safety Plan and reviewed during the "tailgate safety <br />' meeting". <br /> PERMIT APPLICATION <br />' Attached, please find the required triplicate permit application form, letter of C-57 <br /> contractor certification (Attachment 2), and the check for $60 00 (Attachment 3) <br /> Unocal will send the Site Mitigation Acknowledgment Form under separate cover <br /> If you have any questions concerning this workplan or other site closure issues, please <br />' do not hesitate to call us at (510) 416-2900 <br /> Sincerely, p <br />' MITTELHAUSER CORPORATION '�'� <br /> p, GHQ 561 <br /> on��10Ro� W Pa ler' Peter L. Schaefer <br /> 9 p <br /> Project Geologist Senior Geologist, RG 56 OF CALtFo <br /> PES JDAG RWP/paw <br />' 21 aa_W3A WP <br /> Attachments- Figure 1 Site Location Map <br /> Figure 2- Well Location Map <br />' Attachment 1: Permit Application Form <br /> Attachment 2: Letter of C-57 Certification <br /> Attachment 3 Check for $60.00 <br /> 1 <br /> cc• Edward Ralston, Unocal Corporation <br />