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Protective Surface Casing <br />Concrete Pad <br />Well Centralizers <br />(Every 40') <br />10-20' Length Screen - <br />2 Sediment Trap <br />Threaded Bottom Cap <br />Locking Well Cover <br />Ground Surface <br />Figure 3 <br />Well Construction Details <br />Disco Site <br />Stockton, CA <br />Cement Grout <br />6" Diameter Borehole or <br />10" Diameter Borehole <br />2" Diameter PVC (Schedule 40) or <br />6" Diameter PVC (Sch 80) <br />2' Bentonite Seal <br />Well Centralizers <br />Filter Pack Sand <br />(Sized from grading analysis) <br />Well Centralizers <br />CH2MHILL <br />S-1)0-(S.53 <br />131420.AI.WP CreIrcln Od. 11/11/00 mai alo