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• marginally suitable to unsuitable guitleline levels during Phase 1 sampling were included <br />on the Phase 11 analyses list. chose constituents which were below detection limits were <br />naturally omittetl from the Phase 11 analyses list. <br />Phase I overburden sampling and analyses results for the Yoast study area were presented <br />to the Division on March 23 and Mey 30, 1990 (letters, G. Wendt to C. Mount). TAe <br />analysis list for the four Phase II sample sites included pX, EC, Saturation percent, acid <br />base potential, iron, manganese, nitrate, and particle size. The list includes all Phase <br />1 parameters which had values that exceeded unsuitable levels or had maximum concentration <br />greater then 50 percent of the threshold value. Total combustible solids, en indicator of <br />the fire hazard potenti el, was not analyzed on Ph ese 11 samples since carbonaceous <br />overburden materials, other than the Lennox coal seam and other discontinuous very thin <br />coal stringers, are not present at Yoest. No mercury or arsenic analyses are werrantetl et <br />Toast due to the extremely remote chances of any potential mercury or arsenic toxicity. <br />There have been no documented cases of arsenic or mercury taxicr[y Co ptert[s or co enrmats <br /> under normal conditions (Munshower, 1983). Nercury and arsenic toxicity is limited to <br /> industrial or agricultural situati ons where mercuric or arseni c fungicides or other <br />• contaminants ere used (8arrett et al., 1980). Nitrate analyses were completed on the <br /> Phase 11 samples because elevated levels have been previously reported in overburden <br />samples from the Seneca II end 11•Y Nine areas. Manganese end iron analyses were included <br />to confirm or deny the drill stem contamination hypothesis. <br />Analvticel Procedures - Phase 1. At the lab (Peabody Central Lab, Freeburg, Illinois), <br />cores were air dried, split, end composited according to lithologic end stretigrephic <br />sequence, crushed to pass a 10 end/or 20 mesh sieve, and bagged for storage. Prior to <br />splitting end crushing intact cores, foreign materi0l attached to the outside of the core <br />was removed. <br />All samples trom the ten Phase I cores were chemically and physically analyzed at Peabody <br />Central Laboratory using the procedures listed in Table 3. The parameter and procedure <br />Lis[ was developed by Peabody's soil scientist (G. Yendt) and hydrogeologist (R. Smith) in <br />consultation with a hydrologist from the USGg (B. Williams). <br />Analrtica! Arocedures - Phase I!. At the !ab (Inter!)owtta in lab, Farati rr,gton, .9eu Nexicol, <br />• core samples were air dried, split, end composited according to the lithologic end <br />stratigraph is sequence. Overburden chip samples were collected from two-f oot vertical <br />21 <br />