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1. Whole rock analysis using x-ray fluorescence <br />2. Acid base accounting <br />3. Leachability using the EPA 1312 test method <br />4. Humidity cell testing. <br />Results of these tests indicate limited potential for the waste rock to produce acid or leach <br />metals in quantities that would affect storrnwater drainage. In fact, most of the rock types <br />did not leach constituents in quantities that were above the analytical detection limits. <br />The results of these tests are contained in the approved DMG Permit and permit technical <br />revisions that are on file with DMG. The character of the rock based on these tests <br />indicates a low risk of contamination to receiving water as the result of contact with <br />runoff associated with surface stormwater. Therefore, sediment is considered to be the <br />primary contaminant that requires further management controls since most of the <br />facilities have been topsoiled and reclaimed. <br />6.0 POLLUTION SOURCE IDENTIFICATION AND RISK ASSESSMENT <br />This section of the stormwater management plan addresses each of the mine facility <br />azeas. The discussion for each area begins with a description of the potential source(s) <br />and type of pollutant(s), followed by a risk assessment of the potential for dischazges <br />from this area and preventive measures taken or to be taken to avoid a discharge. The <br />presentation for each azea concludes with a discussion of the good housekeeping and best <br />management practices implemented to prevent pollutant discharges. The locations for <br />each of the mine facilities discussed in this section aze shown in Figure 1. <br />6.1 Mining Area <br />Source <br />As discussed in the Facilities Description (Section 2.0), the East Pit and West Pit areas <br />have been backfilled and reclaimed. As discussed in the Areas Subject to Effluent <br />Limitations section (Section 4.0), a water treatment facility has been constructed and is <br />currently being operated to treat groundwater extracted from the West Pit. The approved <br />DMG permit includes diversion ditches to collect and convey upgradient stormwater <br />Battle Mountain Resources, Inc. Tefesto Solutions, lnc. <br />:a~ mu nomw~:. mnoagemenrFm+.doc 16 May 3, 1002 <br />