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, <br /> Proposed Monitoring <br /> Well Construction <br /> Wellhead cover <br /> Cement base <br /> � o <br /> Land surface <br /> o� 4" PVC casing <br /> � Qo O.o <br /> O' P <br /> 9 0 <br /> Cement sanitary seal ° <br /> d. o <br /> 00 <br /> 5 feet minimum* <br /> °� ap <br /> 5 <br /> *Actual cement sanitary seal thickness Bentonite clay <br /> shall be determined on a site by site basis. transitional seal <br /> Minimum seal thickness shall be S feet;when <br /> appropriate,seal thickness shall be increased , <br /> to 8 to 10 feet by shortening the sand filter <br /> pack,well screen,and sump length. <br /> 10 <br /> i <br /> Sand filter pack <br /> 15 <br /> 10 ft slotted screen <br /> 20- <br /> 2 ft Sump <br /> Note: Below grade wells shall be enclosed <br /> in a flush mounted traffic rated vault cap ' <br /> box with lid(not shown). <br /> HYDROFOCUS? Typical Monitoring Well Construction Figure <br /> PROJECT: 5023 DATE: 4125105 <br />