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porosity), a lesser geochemical benefit (increased rate of carbonate leaching due to increased <br />water movement) may result. <br />4.0 Regraded Spoil Monitoring Program <br />In order to provide a feedback system to check the reliability of the overburden sampling and <br />analysis program, a regraded spoil sampling program will be initiated. The regraded spoil will <br />be sampled prior to topsoil replacement with a hydraulic soil sampler, a bucket auger, or other <br />suitable equipment. Personnel will inspect the surface spoil between sample points. If a <br />significant change in spoil characteristics is observed between sample points, additional sample <br />sites will be located. Regraded spoil will also be visually inspected for compaction, possible <br />root growth problems, and the potential for slippage at the topsoil /spoil interface. The lateral <br />and vertical sampling intensities are closely evaluated once sufficient samples is collected to <br />determine the degree of sample variability. This sampling program will ensure that the top four <br />feet of regarded spoil is non -toxic and chemically /physically suitable to enhance plant growth. <br />See Tables 2.05.4(2)(d) -1A and 1 B for all sample parameters, increments, and frequency. <br />Prior to PR -06, the regraded spoil samples were analyzed for the following parameters to <br />determine spoil suitability: pH, acid base potential, boron, particle size (texture), saturation <br />percent, EC, and SAR. These parameters were based upon the baseline information acquired <br />during the pre -mine overburden sampling program (Section 2.04.6). <br />Permit revision 06 re- orients the sample grid to north - south /east -west to better reflect the <br />current mining pattern, the sample grid 1 hole per 5 acres, and setting the soil sampling <br />parameters and frequencies to that shown in Tables 2.05.4(2)(d) -1A and B. <br />Revised PR 06 June 10 2.05.4(2)(d) -4 <br />