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Figure 93: Air Sparge Well Construction Schematic <br /> Cutter Lumber Site <br /> W930 South Eldorado Street Flush Mounted Well Box <br /> Stockton, CA 95206 oncrete Collar <br /> ' Paved Surface <br /> e <br /> 2" Diameter Schedule 40 Blank Casing <br /> Clay& Silt <br /> ' 20 feet <br /> Sand & Silt <br /> 'f Cement Grout <br /> 30 feet <br /> Silt&Clay _~ Approximate Groundwater Level <br /> _ 40 <br /> Sand& Silt ........ Bentonite Transition Seal <br /> i <br /> A10 Slotted 2" Schedule <br /> 40 PVC Casing <br /> 45 fe #3 Sand Filter Pack <br /> Silt <br /> lS0 feet " Diameter Boring <br /> Clay and Silt <br />