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• • <br /> KLEINFELDER <br /> nn emph)yft. r) nVd cwnpnny <br /> Work Description <br /> File No, 87057.G04 <br /> March 24, 2008 <br /> Mr. Frank Girardi, REHS <br /> San Joaquin County Environmental Health Department <br /> 600 East Main Street <br /> Stockton, CA 95202 <br /> Subject: Installing 4 piezometers for groundwater depth readings <br /> Depth: 40 to 50 feet <br /> Site: Delta Water Supply Pipeline <br /> Location: North of Eight Mile Road and East of Rio Blanco Road, San Joaquin <br /> County, California (Thompson Property) <br /> Dear Mr. Girardi: <br /> Kleinfelder is planning on installing four piezometers north of Eight Mile Road near <br /> Bishop Cut slough in San Joaquin County, California. The 40 to 50-foot-deep <br /> piezometers will be drilled using a CME 75 truck mounted drill rig equipped with mud <br /> rotary capabilities. We will use 2-inch diameter PVC-pipes for casing. The casing in the <br /> upper 5 feet will be solid with the remaining depth of casing screened. The annular <br /> spacing between the casing and bore hole will be filled with sand within the screened <br /> region of the casing. The sand will be capped with a layer of bentonite followed by <br /> grout to the surface. The piezometers will be grouted with neat cement during <br /> construction of the pipeline. We expect construction to proceed within 12 to 18 months. <br /> If groundwater not encountered, borings will be grouted. <br /> Sincerely, <br /> KLEINFELDER WEST, INC. <br /> Adam Killinger <br /> Project Engineer <br /> AJK:va <br /> Attachment: Piezometer Location Map <br /> 87057.G04/STOBL063 ®2008 Kleinfelder <br /> KLEINFELDER 2825 East Myrtle Street,Stockton,CA 95205.4794 (209)948-1345 (209)948-0621 fax <br />