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f' VAPOR EXTRACTION WELL <br /> CONSTRUCTION DETAILS <br /> PROJECT: BEACON STATION #494 VAPOR EXTRACTION WELL NO.; VW-4 <br /> 2185 E FREMONT ST <br /> STOCKTON, CA <br /> 1 Y <br /> Protective Casing <br /> Locking Water Tight Cap <br /> Flush Grade Well Construction <br /> Diameter and Mat'I 24 inches, steel <br /> Total Length 10 Inches <br /> ' Length Above Grade 1/2 inch <br /> — Thickness and Type of Sial 1 foot, concrete <br /> ' Diameter, Material and 2—inch SCH 40 PVC <br /> m Joint Type of Riser Pipe flush thread <br /> y j Type of Backfill Around Riser Type 2 <br /> poriland cement <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 Filter Around Screen #3 lonestor ` <br /> Monitoring Well Mat'I SCH 40 PVC <br /> Screen Gauge/Slot Size 0.02—inch <br /> Diameter and Length of Screen 2 Inch, 15 feet <br /> Completion Depth 35 feet <br /> ' Thickness and Type of Seal bentonite chips <br /> Type of Backfill Around Riser benionite 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 Filter Around Screen #3 lonestor <br /> Monitoring Well Mai'I SCH 40 PVC <br /> Screen Gauge/Slot Size D_02--1"h <br /> Diameter and Length of Screen. _2 inch,.:15.1eet <br /> Depth to Bottom of Vapor Well 75 feet <br /> -- Thickness and Type of Seal n/a <br /> Total Depth 75 feet <br /> 10 in <br /> ' COMPLETED: 2:45 12-10-92 <br /> IP <br /> ' ACTON 9 MICKELSON e VAN <br /> DAM, INC . <br />