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• Spoil Quality <br />The spoil sampling and analysis program approved for Nutle Mine, Mining Area 1, is described <br />in Tab 21 of Permit C-81-008. Spoil samples were collected during November end December 1991 <br />and January 1992 from 19 sites in the Pit 1 reclamation area. Samples were collected from the <br />sidewalk of five foot deep pits excavated with a D9 dozer. All spoil samples were shipped to <br />Inte r-Hountein Laboratory (IML) in Sheridan, Wyoming for analysis. <br />The location of each spoil pit is shown on the 1~~ 400 scale existing topography base, <br />Exhibit 91.2, Soil and Spoil Monitoring Nap. Field description data, including li thology and <br />color, is on file et Peabody~s Western Division office in Flag°;aff, Arizona. Laboratory <br />results for the 38 spoil samples are presented in Attachment 92.1. The analytical results <br />indicate ell spoil is suitable. No additional grading, special handling, or amendment <br />application was needed prior to soil replacement. <br />Duality control is an important part of [he Nucla Mine spoil monitoring program. One aspect <br />of this quality control program is to have the primary laboratory facility Complete duplicate <br />analyses on 5 to 10 percent of the total samples. The duplicate analyses, presented on the <br />• laboratory reports in Attachment 92.1, were very comparable with the original samples. <br />Soil Redistribution <br />Soil from stockpile sites 8 and 13 was redistributed over 59.4 acres of final graded spoil in <br />the Pit 1 reclamation area as shown on Exhibit 92.1. Soil vas replaced from November 1991 to <br />January 1992 following procedures listed in Tab Z1 of the permit. <br />Soil Thickness <br />The thickness of soil replaced during the November 1991 through January 1992 period was <br />verified by sampling on May 20 end 21, 1992. Sample sites were selected systematically <br />utilizing the 300 foot 60° slant grid system presented in Teb 21 of [he approved permit. <br />Sites were located and staked in the field by compass end be controlled pacing from readily <br />identified reference points. <br />A 2-3/4 inch bucket auger Was used at each site to excavate a pilot hale through the entire <br />soil strata. An abrupt boundary, defined by color and rock fragment content, typically <br />occurred at the soil/spoil interface. The replaced soil thickness Wes measured through the <br />• pilot hole immediately after encountering the spoil. <br />A brief soil description was prepared at each sample site. Moist color, texture, end soil <br />2 <br />