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i <br /> Chevron Products Company Page 2 <br /> Aril 22 <br /> Chevron Service Station 20-1761 1103 South Main Street Manteca CA 2002 <br /> The wells were then pressure-grouted, at 30 pounds per square inch, from the bottom up <br /> using a tremie pipe with Portland type MI neat cement grout until the grout spilled over into <br /> the excavation. The grout filled the hole to a depth of one foot and formed a cap of a <br /> diameter one foot greater then the diameter of the original borehole. The boreholes were <br /> completed to surface grade with concrete or asphalt, as appropriate, to match the adjacent <br /> surface. <br /> i <br /> If you have any questions regarding this letter, please call Bill Brasher of SECOR at <br /> (916) 861-0400, extension 284 or Bob Cochran of Chevron at (925) 842-9655. <br /> Sincerely, <br /> SECOR International Incorporated . <br /> 'f <br /> r <br /> i <br /> F <br /> i ' S7 ' <br /> Elizab oten uis i� William E. Brasher, P.E. <br /> Staff Scientist E Project Manager <br /> j <br /> Attachments: Figure 1 — Site Location Map t <br /> Figure 2 —Site Plan with Destroyed Groundwater Monitoring Wells <br /> Attachment A—San Joaquin County Well Destruction Permit <br /> cc: Bob Cochran, Chevron Products Company, San Ramon, CA <br /> Marty Hartzell, Regional Water Quality Control Board, Sacramento, CA <br /> 'r <br /> i <br /> J <br /> ,y I <br /> it <br /> I <br /> 1:1Chevron\2017611Reports\welldestructionreport.doc <br /> i <br /> E <br />