2008-05-14_PERMIT FILE - X200714211 (3)

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2. Describe what and where reclamation activities have occurred in the past 180 days. Mention sealing and plugging, regrading, retopsoiling and reseeding activities. (Attach additional pages, if needed.) Abandonment sealant consisted of 50 pound bags of "Bore-Gel" bentonite, mixed with approximately 1 gallon of water per pound in a 200 gallon stock tank. Once the hole was drilled to total depth, it was blown clean of cuttings and the mixed sealant pumped through the drill string, until the sealant circulated to the top of the hole. The drill pipe was then "tripped" out of the hole and additional sealant pumped into the hole, as the drill pipe was withdrawn. In all cases, the sealant level would drop to the top of the unweathered bedrock, typically at a depth between 10 and 20 feet. The drill rig would then move off the hole and onto another location. Each of the holes was logged with geophysical tools. After logging, the drilling contractor would complete final reclamation of each hole by dumping 2 50 pound bags of bentonite chips into the hole, then shoveling cuttings into the hole to a depth of 10 feet below the surface. The final ten feet of hole was then filled with concrete. An aluminum survey monument labeling each hole was set in the concrete at the surface. See attached figure for diagram (Figure 1). Any remaining cuttings were removed or dispersed and the area seeded with the approved seed mixture. The location of hole CB07-20 and the twinned core hole CB07-20C was located in a hay meadow that is planned to be converted into plowed farmland in the next two years. The two holes at this location were reclaimed in the same manner as all other except that the concrete plug extends from ten feet from the surface to three feet from the surface. The top three feet of the hole was filled with native soil. These holes were also not marked with a survey cap.