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TRAFFIC RATED WELL BOX <br /> EXISTING GRADE <br /> I <br /> HOLLOW STEM AUGER NEAT CEMENT GROUT <br /> BOREHOLE (10-INCH) <br /> 1-INCH SCHEDULE 40 BLANK PVC 4-INCH SCHEDULE 40 BLANK PVC <br /> CASING, FLUSH THREADED CASING, FLUSH THREADED <br /> CASING LENGTH = 12 FT <br /> BENTONITE CHIP SEAL <br /> t t SEAL LENGTH = 2 FT <br /> ���• •t• t t <br /> S 1 <br /> l�t�• t~t. ••ti.ti <br /> r~r`' f�}• f • ; CLEAN IMPORTED COARSE AQUARIUM <br /> ftif; fti; f~r: SAND- SAND LENGTH = 12 FT <br /> ti•ti <br /> l•l t+: l t I <br /> t�fS• tyt. t 1 <br /> tttS• ftf. ftifti <br /> ti••• ti•• 4-INCH 0 030 IN SLOT SCHEDULE 40 PVC <br /> !•l• t•t• l 1 <br /> SCREEN, FLUSH THREADED <br /> 1•L• tip• ti.ti <br /> fL 1 tf• ftifti <br /> 1f•,. fti 1•ti.ti Sf1fti <br /> PVC BOTTOM CAP <br /> BENTONITE CHIP SEAL <br /> 50 <br /> CLEAN IMPORTED MONTEREY#3 SAND <br /> 1-INCH 0 020 IN SLOT SCHEDULE 40 <br /> PVC SCREEN, FLUSH THREADED 55 <br /> PVC BOTTOM CAP <br /> TOTAL DEPTH = 55 FEET <br /> SECTION NOT TO SCALE <br /> Figure 4. Air Sparging/Vapor Extraction Nested Well Construction <br />