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<br />• <br />• <br />J <br />2.05.4(2)(f) <br />(f) It is not planned to dispose of any acid forming, <br />toxic forming, or other materials which would create a fire hazard <br />at the mine. <br />There is a layer of gray shale above the first <br />minable seam that has acid forming characteristics. The concern <br />with regard to this problem is whether the material will be <br />suitable for subsoil. Blending of this material with other <br />overburden will often effectively dilute the acid forming charac- <br />teristics. After subsoil testing as outlined in Section 2.05.3(6), <br />unsuitable areas will be blended with other overburden or adequate <br />quantities of agricultural grade limestone will be mixed into the <br />subsoil to increase its pH. <br />Waste oil and grease will be disposed of in two <br />ways. During summer months some of the waste oil generated can be <br />added to diesel fuel and consumptively used. All other waste oil <br />and grease will be accumulated is metal storage containers and <br />periodically picked up by an approved waste oil service. <br />Waste paper, lumber, garbage etc. will be accumu- <br />lated in a container, dumpster, designed for that purpose and <br />periodically picked up by a commercial trash service. <br />The oil and grease, paper, lumber, garbage etc. will <br />be stored at the mine office facilities and parking area. <br />If sustained combustion of any of the above material <br />becomes a problem the applicant will be prepared to react <br />appropriately. Chemical fire extinguishers will be available in <br />the shop warehouse area and on mobile equipment. A water truck <br />will be available to respond to any problem area. Earth moving <br />equipment will be available to smother a fire if necessary. <br />(g) Drill holes, not completed to aquifers will be <br />sealed by replacing cuttings or other suitable media in the hole <br />and placing a suitable plug 10 feet below the ground to support a <br />cement plug or other media approved by the Division to within 3 <br />feet of the ground surface. <br />Drill holes completed in non artisan aquifers will <br />be sealed using cement or other suitable sealant by placing the <br />sealant to extend 20 feet above and below the water bearing zone. <br />A surface plug will then be placed in accordance with the above <br />paragraph. The hole will be marked. <br />2.05-29 <br />July 1992 <br />