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MONITORING WELL <br /> CONSTRUCTION DETAILS <br /> (PROPOSED) <br /> PROJECT: Beacon Station J474 <br /> � 3440 East Main Street <br /> Stockton, California <br /> Protective Casing <br /> $ Locking Water Tight Cap <br /> Flush Grade Well Construction <br /> Diameter and Mat'I 12-inch steel <br /> Total length 12 inches <br /> Length Above Ground 1/4 inch <br /> Thickness and Type of Seal 2 feet, concrete <br /> Diameter, Mat'l and 4 inch, SCH 40 PVC, <br /> Joint Type of Riser Pipe flush thread <br /> N <br /> k Type of Backfill cement/ 5% <br /> Around Riser bentonite grout <br /> Thickness and Type 2 feet <br /> of Seal bentonite chips <br /> • -j Distance of Filter Sand 2 feet <br /> Above Top of Screen <br /> Type of Filter #3 lonestar <br /> E Around Screen <br /> Monitoring Well Mat'I SCH 40 PVC <br /> Screen Gauge/Slot Size 0.020 inch <br /> n <br /> Diameter and Length <br /> 4 inch, 15 feet <br /> of Screen <br /> Depth to Bottom <br /> of Monitoring Well 85 ft <br /> Depth to the Bottom <br /> of Filter Sand 55 ft <br /> �+- 10 in <br /> L1 0.25 ft <br /> L2 = 69,75 ft _ <br /> L3 15 ft <br /> L4 = 65 ft <br /> a Approximate Depth to <br /> Groundwater 75 ft <br /> ACTON MICKELSON VAN DAM , INC. <br />