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However, based on the results of the extensive overburden suitable sampling program stated <br />above, both the soil sample locations and analytical parameters changed in July of 1999. The <br />sample grid is now oriented north -south and east -west to better reflect the current mining <br />pattern, the sample grid is 600 feet by 600 feet, and the soil samples are analyzed for boron, <br />pH and EC. In the event that the sample results indicate the need, WFC will implement the <br />Unsuitable Spoil Mitigation Plan listed below. <br />5.0 Unsuitable Spoil Mitigation Plan <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 <br />to better define the lateral extent and variability of the unsuitable material. <br />2. In those areas where specific geochemical or physical problems are encountered, the <br />regraded spoil will be mechanically loosened and mixed by ripping, chiseling, or <br />approved alternate forms of scarification. The major advantages of scarification are <br />related to the physical properties of the spoil. The topsoil and spoil are scarified to <br />decrease compaction, increase aeration and water movement, and increase plant <br />rooting depths. Increased water movement may, to some degree, allow more <br />downward leaching of carbonates. Therefore, although the greatest benefits of <br />scarifying are related to the physical soil properties (density, porosity), a lesser <br />geochemical benefit (increased rate of carbonate leaching due to increased water <br />movement) may result. <br />3. 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 />WFC will maintain and periodically review the existing quality control program used to evaluate <br />overburden, interburden, and spoil handling activities at New Horizon Mine. WFC will maintain <br />records of the sampling results for each logical reclamation unit. These records will be kept on <br />(Revised October 2009) 2.05.4(2)(d) -10 <br />