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5 <br /> VAPOR EXTRACTION WELL <br /> CONSTRUCTION DETAILS <br /> PROJECT BEACON STATION #494 VAPOR EXTRACTION WELL NO VW–i <br /> 2185 E FREMONT ST <br /> STOCKTON, CA <br /> Protective Casing <br /> I—III— Locking Water Tight Cap <br /> +--- Flush Grade Well Construction <br /> Diameter and Mat'l 24 inches, steel <br /> Total Length 10 inches <br /> Length Above Grade 1/2 inch <br /> �- Thickness and Type of Seal 1 foot, concrete <br /> Diameter, Material and 2–inch SCH 40 PVC <br /> m ` Joint Type of Riser Pipe flush thread <br /> Type of Backflll Around Riser Type 2 <br /> portland cement <br /> Thickness and Type of Seal 2 feet, benfonite pellets <br /> Distance of Filter Sand 2 feet <br /> Above Top of Screen <br /> Type of Filter Around Screen #3 lonestar <br /> Monitoring Well Mail SCH 40 PVC <br /> Screen Gouge/Slot Size 0 02–inch <br /> Diameter and Length of Screen 2 inch, 15 feet <br /> Completion Depth 40 feet <br /> Type of Backfill Around Riser bentonite chips <br /> Thickness and Type of Seal 2 feet, bentonite pellets <br /> Distance of Filter Sand 2 feet <br /> Above Top of Screen <br /> Type of Filler Around Screen #3 lonestor <br /> --EMonitoring Well Mat'I SCH 40 PVC <br /> Screen Gouge/Slot Size 0 02–inch <br /> DIameler and Length of Screen 2 Inch. 15 feet <br /> Depth to Bottom of Vapor Well 75 feet <br /> — Thickness and Type of Seal n/a <br /> Total Depth 75 feet <br /> I+- <br /> 10 In <br /> COMPLETED 1010 12-10-92 <br /> ACTON • MICKELSON • VAN DAM , INC. <br />