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• <br />4) Period of Exploration <br />Drilling will commence in August, 1983 and will be completed by <br />August, 1984. <br />5) Legal Right to Enter <br />Dorchester Loal Company on May 9, 1983, signed a lease with The <br />Corley Company for the properties listed in Exhibit A. <br />6) Measures to Minimize Adverse Environmental Impacts <br />Access - Proposed drill holes have been located near existing roads <br />and trails to minimize surface disturbance. If, for any reason, roads are <br />damaged by use, or require modification prior to use, mine equipment will be <br />used to restore the roads to as near the original conditions as is possible. <br />All drill sites have been located in open areas to further minimize and control <br />• vegetation disturbance. <br />Site Preparation - All sites have been chosen to minimize site grading <br />and leveling. The drill rig will use self-contained leveling jacks to <br />further minimize drill site preparation. <br />Topsoil Handling - Topsoil will be stripped from the area to be <br />affected by drilling activities and will be stockpiled near the drill site. <br />Topsoil will be redistributed over the disturbed area following cleanup of <br />the drill site. <br />Containment of Drilling Fluids - Drilling fluids will be contained <br />by using both a portable mud pit and by excavating a pit (approximate <br />dimensions (15'x20'x5') to retain excess fluids. <br />Drill Hole Abandonment and Site Restoration - As each drill hole is <br />completed it will 6e sealed to within 10 feet of the surface with abandonment <br />drill mud. A cement plug will be placed from that point to about three (3) <br />feet of the surface. Soil will be used to fill the remaining three feet. <br />The area will then be graded and the topsoil spread over the disturbed area. <br />• Affected areas will be reseeded with the approved seed mixture for the Dorchester <br />pl Mine. <br />-2- <br />