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access route. This topsoil will be redistributed during the reclamation. Drill Pad Construction ' Drill pad dimensions will be kept to a nominal size of 100 feet by 100 feet. Topsoil will be stripped to a depth of approximately 18-24 inches depending upon the quantity available. The topsoil will be stockpiled on the uphill side of the pad, clearly separated from the pad and any subsoil. A "topsoil" sign will clearly identify this material. When applicable, a small ' ditch approximately six inches deep and 1 foot wide will be placed around the uphill side of the topsoil pile in order to prevent soil erosion. Ditching in this manner will divert any ' potential overland flow of surface runoff. After stripping and stockpiling of topsoil, minor leveling will be conducted to accommodate the drill equipment. As illustrated ' on Map 1, drill sites have been located on gentle slopes or on bench areas in order to minimize leveling requirements. Mud pits will be constructed within the stripped area. Generally two or ' three pits are required with typical dimensions being 10 feet long, five feet wide and six feet deep. The size of the pits are dependent upon the anticipated drilling depths and conditions. The ground material excavated from the pits will be stockpiled on 1 the stripped area, as to protect from topsoil contamination. If any hole would require being twinned, it is anticipated that the same drill pad area will suffice, with only minor elongation of the pad occurring. The anticipated acreage of disturbance and topsoil salvage associated with drill pad construction is a total of 1.6 acres. This 1.6 acres is based on Seven locations at 100 feet by 100 feet. In addition, a maximum of .2 acres of access corridor might require topsoil salvage (assuming a fourteen foot width, ' 100 feet long). Again, It is the intention to access the sites without stripping topsoil if ground conditions allow. This practice will aid in minimizing surface disturbance. ' As previously mentioned, groundwater aquifers will be penetrated during drilling. The significant bedrock aquifers of the area ' are the Twentymile Sandstone and the Trout Creek Sandstone. Other minor local aquifers do occur and consist of thinly interbedded, very fine to fine grained sandstones, siltstones, and coal beds. These minor aquifers are generally laterally t discontinuous and have low and variable water yields.1 In the event that artisan flow is encountered during the drilling activities, the water from the hole will be routed to the mud 1Williams Fork Tract Profile, Bureau of Land Management, ' 1982.