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State Reg. <br />C the regraded spoil surface. Where acid spoil (pH <5 and ABP <br /><-5) is encountered at the regraded spoil surface, a selectively <br />handled suitable spoil topdressing or lime application will be <br />required. <br />The elevated nitrate concentrations that occur in samples from <br />the 1981 cores (2034E, 2613E, 2614E) are apparently <br />nonrepresentative. These cores were very wet when sampled and <br />were not dried before shipment to the laboratory. Also, <br />contamination from drilling additives may have occurred during <br />drilling. Therefore, the nitrate concentrations may be <br />atypically high due to sampling error. <br />No revegetation or ground water contamination problems are <br />anticipated from nitrate. Both the premine ground water <br />monitoring data (WA-0043 and WA-0044) and the postmine spring <br />(BP-0001) and pond data (DA-0004) indicate that N03-N values <br />are suitable (<10 mg/1} in the vicinity of Sites 2034E, 2613E, <br />and 2614E (see Exhibit 7-2, Hydrology Monitoring Site Location <br />Map). Postmine spoil water quality will continue to be <br />monitored for N03-N at Sites BP-0001 and DA-0004. Spoil <br />samples will also continue to be collected and analyzed for <br />N03- and NH4-N from representative vegetation transect <br />locations in the Wadge mining area. <br /> <br />6-153a Revised 10/1/86 <br />