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5.0 Unsuitable Spoil Mitigation Plan <br />In the event that any one spoil sample result exceeds the limits listed in Table 2.05.4(2)(d)-1, the <br />Unsuitable Spoil Mitigation Plan listed below will be implemented. <br />If one or more parameters fall within the unsuitable range at a given grid point, a three-part <br />mitigation plan will be implemented. <br />1. The area around a suspect hole will be sampled on a closer spacing interval in order to <br />better define the lateral extent and variability of the unsuitable material. This sampling <br />will be called the 2nd Phase sampling and the interval is one hole per 50 feet distance <br />around the bad point in all directions for Prime Farmland (Zones 3 & 8), and one hole <br />per 100 feet distance around the bad point in all directions for non -prime farmland. <br />2. If 2nd phase sampling shows an exceedance, follow-up sampling will take place to <br />delineate the area of exceedance. Delineated areas of exceedance that are larger than <br />0.1 acres for irrigated cropland, 0.25 acres for reclaimed irrigated pastureland or 0.50 <br />acres for dryland pasture will be remediated. <br />3. For remediation, any area identified above which exceeds the acreages stipulated <br />above for unsuitable surface spoil material will be placed at least eight feet below the <br />final soil surface. New spoil material will be used in its place. This material will be <br />tested according to the original grid (1 hole per 5 acres) to confirm its suitability. <br />4. If none of the above procedures satisfactorily mitigate a certain problem, the Division <br />will be notified and recommended actions will then be implemented. <br />Any remedial backfilling and/or burial will be completed in a manner that results in final surface <br />elevations and topography that are consistent with the approved reclamation plan and are <br />compatible with the post mining land use for the remediated area. <br />The existing quality control program is used to evaluate overburden, interburden, and spoil <br />handling activities and are maintained and periodically reviewed. Records are maintained of the <br />sampling results for each logical reclamation unit. These records are kept on file at the mine site <br />and will be reported within the topsoil balance/spoil quality report to be submitted annually to <br />DRMS by March 15a'. <br />July 2018 (TR -84) 2.05.4(2)(d)-5 <br />