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Proposed Monitoring <br /> Well Construction <br /> Wellhead cover <br /> Cement base <br /> Land surface <br /> 00 <br /> D� 4" PVC casing <br /> ❑ _ Po 0 0 <br /> RQ �q <br /> o. <br /> a. D <br /> Cement sanitary seal o °o <br /> oa <br /> 0 <br /> 5 feet minimum* oQ °� <br /> D� avg <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 5 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 /> Sand filter pack <br /> ' ►5 ft slotted screen <br /> �- i5-zoo <br /> ft Sump <br /> Note: Below grade wells shall be enclosed 3 - ' <br /> in a flush mounted traffic rated vault cap <br /> box with lid (not shown). <br /> Figure <br /> HYDROFOCUS= Typical Monitoring Well Construction 7 <br /> 25/05 <br /> PROJECT: 5023 DATE: 4/ <br />