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05/21/97 WED 14:20 FAX 510 842 6915 CPL HELP H,0. <br /> MONITORING WELL TW-1 <br /> CONSTRUCTION DIAGRAM <br /> Traffic-rated cover Well cap <br /> Ground surface <br /> 2". Sch.40 blank casing Christy box <br /> Locking steel cover <br /> 8-inch diameter borehole <br /> Cement grout <br /> (5% bentonite) <br /> 17 below ground surface <br /> Transition seal <br /> (bentonite chips) <br /> la <br /> No.# 1/20 filter sand <br /> 2' Sch.40 well screen <br /> (0.01-inch slot) <br /> End caw 25" <br /> 0 1 toot <br /> 5x <br /> Vertcal <br /> Exaggeration <br /> 5 feet-J <br /> lk 7-W-1 WELL CONSTRUCTION DIAGRAM Figure <br /> Hanson Prop"(APN 252-040-02) 2 <br /> GF-CMATRIX 7750 Schutte Road Protect No. <br /> Tracy,California 4097 <br /> i:7 <br />