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' Traffic -rated <br />Locking Cap, Well Box <br />Ground Surface <br />Ln <br />0 <br />nMM <br />Concrete <br />Cement Grout <br />Blank PVC Casing <br />Bentonite Grout <br />Bentonite Chips Seal <br />2 inch Schedule 80 <br />PVC Flush <br />Threaded Casing <br />(Slotted) <br />Filter Pack Sand <br />Blank PVC Casing <br />Threaded PVC End Cap <br />NOT TO SCALE <br />ES102008013SC0378312.03.04 SFM"picahwell.ai 1/09 <br />FIGURE B•1 <br />TYPICAL PIEZOMETER CONSTRUCTION DETAILS <br />SR -710 TUNNEL TECHNICAL STUDY <br />f%Y7PLA LJII I — <br />L__� <br />__ Filter Pack Sand <br />sl incMh Q <br />655 <br />Total Depth (D) <br />Total Depth of Casing (D1) <br />– 29 - 35 ft <br />Depth to Bottom of Well Screen (D2) <br />– 19 - 25 ft (pending actual soil profile) <br />Depth to Top of Well Screen (D3) <br />– 9 ft <br />Depth to Bottom of Top Seal (D4) <br />– 8 ft <br />Depth to Top of Top Seal (D5) <br />-- 7 ft <br />Depth to Bottom of Cement Grout (D6) <br />– 2 ft <br />Well Casing Diameter <br />2 -inch <br />Well Screen Slot Size <br />–0.02 -inch <br />Filter Pack Sand Type <br />Monterey No. 3 <br />Bentonite Seal Type <br />Neat cement <br />NOT TO SCALE <br />ES102008013SC0378312.03.04 SFM"picahwell.ai 1/09 <br />FIGURE B•1 <br />TYPICAL PIEZOMETER CONSTRUCTION DETAILS <br />SR -710 TUNNEL TECHNICAL STUDY <br />f%Y7PLA LJII I — <br />