Laserfiche WebLink
16.0 Placement of Bentonite Seal <br /> The Contractor shall install the bentonite seal by pouring bentonite <br /> pellets from the surface in a fashion to prevent bridging. The work <br /> shall be paid at the hourly well completion rate. <br /> 17.0 Placement of Sanitary Seal <br /> All wells shall have their annular space above the bentonite seal <br /> grouted with a cement slurry. The cement shall be placed in the <br /> wells with a tremie pipe so as to prevent the migration of water <br /> along the PVC pipe as well as the borehole walls. At the surface, <br /> only cement shall be used and the cement shall be sloped such that <br /> surface water will flow away from the completed monitoring well. <br /> This work shall be paid at the hourly well completion rate. <br /> The cement shall consist of Type I/Il Portland cement and bentonite <br /> gel placed as a neat slurry as directed by the Engineer. The cement <br /> will consist of a 14.1 pound per gallon mix, consisting of 7.8 <br /> gallons of water per sack of cement and yielding 1.55 ft3/sack. <br /> 18.0 Steel Protective Cover and Flush Covers <br /> The Contractor shall place the 5-foot long steel locking protective <br /> covers over the wells in such a manner that the wells are easily <br /> accessible from the top of the cover. At least 4 1/2 feet of the <br /> protective cover will be embedded into the cement surrounding the <br /> completion string for the wells which will be completed with flush <br /> covers. The flush covers will then be placed over the steel <br /> protective casings. This work shall be paid on a per well basis. <br /> 19.0 Well Development <br /> The Contractor shall develop the well with a combination of a surge <br /> block and air lifting or pumping. The development will occur until <br /> the well is free of clay and silt, or to the satisfaction of the <br /> 8 <br /> 1130.3:14 <br />