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Section 10-1 Construction Details <br /> Std_ Spec_ Sec_ 70 <br /> Special S1 <br /> Page 2 of 8 <br /> CONSTRUCTION SEQUENCE: <br /> Monitoring well shall be completed in the following <br /> sequence- <br /> A_ Drill and construct the monitoring well_ <br /> B. Develop well_ <br /> C_ install the surface completion features, including the <br /> steel well casing, concrete pad and bollards._ <br /> D_ Survey well location- <br /> PRODUCTS'--- <br /> ocation_PRODUCTS'_-- <br /> A_ Well Casing shall be schedule 40 poly vinyl chloride (PVC) <br /> pipe with square-threaded, flash-joints- <br /> j <br /> S. Well Screen shall be schedule 40 PVC pipe with 0_02-inch <br /> machine-cut slots and square-threaded, flush joints_. <br /> C. Sand Pack: The sand pack shall be clean., well rounded sand <br /> t free of debris or organic impurities_ The sand gradation <br /> shall be in conformance with Lapis Lustre Designation 2/12, <br /> as follows_ <br /> U.S . Sieve Size Cumulative Percent Passing <br /> No_ 8 100 <br /> j No- 12 99-100 <br /> 1f No_ 16 50-75 <br /> -No 20 <br /> -- ------ - 5- -- -- <br /> No- 30 0-5 <br /> D_ Bentonite Seal shall be sodium montmorillonite clay sized <br /> similar to coarse sand or "kitty litter" _ <br /> E_ Neat Cement Seal: The neat cement seal shall consist of a <br /> mixture of Portland cement and potable water_ Add not more <br /> than 7 gallons of water per 94-pound sack of cement_ <br /> F_ Concrete Surface Seal: The concrete surface seal shall l' <br /> consist of a mixture of Portland cement, sand, coarse <br />