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Steel Standpipe and <br /> Locking Well Cover <br /> 1-Inch Rubber Stopper <br /> 11 AC' <br /> 1.5-Feet 1/4-Inch O.D.,3/16-Inch I.D. <br /> Above Ground Surface Teflon Tubing <br /> .Q.. Portland Type II Cement <br /> 1-Inch O.D. Blank PVC Casin <br /> (Schedule 409 <br /> Bentonite Plug <br /> 1-Inch Rubber Stopper <br /> Filter Pack <br /> (#3 Sand) <br /> 0.020-Inch Slotted PVC Screen <br /> (Schedule 40) <br /> Bottom <br /> Not to Scale Plug <br /> S-Inch <br /> Borehole <br /> Figure 2 <br /> Proposed Gas Probe Design <br /> Austin Road Landfill, Stockton CA <br /> CDM Camp Dresser&McKee Inc. <br />