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1 <br /> ' Proposed Monitoring <br /> Well Construction <br /> 1 <br /> ' Wellhead cover <br /> Cement base <br /> Land surface <br /> CL �o <br /> 4" schedule 40 PVC <br /> ' 0 Pp Q casing (not to scale) <br /> oQ ao: <br /> o. <br /> a . o <br /> a. <br /> 0 0.0 <br /> oa. o <br /> 10 ft Cement sanitary seal Q �o <br /> 0 <br /> 5- <br /> 10- <br /> 10 Bentonite clay <br /> transitional seal <br /> 1 V�7- 10" diameter borehole <br /> (not to scale) <br /> 15 <br /> #3 Sand filter pack <br /> 10 ft screen with <br /> ' <br /> zo 0.010" slots <br /> ' , <br /> Note: Monitoring wells located in residential <br /> or park areas shall be below grade. Below 1 ft Sump <br /> grade wells shall be enclosed in a flush <br /> mounted traffic rated vault Flush threaded or slip cap <br /> box with lid (not shown). <br /> HPDR(JFOCUSuK Typical Monitoring Well Construction Figure <br /> 4 <br /> ' PROJECT: 5023 DATE: 1/31/07 <br />