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Seneca H Mine SL -6 Phase M Bond Release Request June 2014 field mapping in the summer of 2010. During the mapping, high density was reserved for those areas apparently (visually) greater than or equal to 1000 shrubs per acre (25 shrubs per 100 sq.m.). All portions of the BRB -5 bond release block outside of these concentration areas were labeled as "Background" density. Table 7 below summarizes the results. Table 6. 2011 and 2012 Data and Sample Adequacy Summary for Background and Concentrated Area Woody Plant Density, Phase III BRB -5. Woody Density Area Woody Density s N Nn,;,, t and Sampling Year Background Density 554.4 853.9 30 408 1.311 2011 BRB -5 Phase III Concentrated Area Density 2035.6 1303.1 50 69 1.299 2011 BRB -5 Phase III Background Density 210.4 392.5 53 572 1.282 2012 BRB -5 Phase III Concentrated Area Density 1614.7 1278.8 53 103 1.282 2012 BRB -5 Phase III 2011 Woody Plant Density Success Evaluation The Background density of 554.4 stems per acre observed in the 2011 BRB -5 Phase III bond release area exceeded the 90 stems per acre performance standard. The mean of 2,035.6 stems per acre observed in the Concentration Areas also well exceeds the 900 stems per acre performance standard. The combined total aerial extent of woody density Concentration Areas was 19.0 acres, or 7.0% of the BRB -5 Phase III bond release block (271.2 acres). Hence the standard that there would be at least 5% of the Phase III BRB block with at least 1,000 stems per acre (90% of the standard equals 900 stems per acre) has been met for 2011. A reverse t -test asserting that the 2011 BRB -5 Phase III Background woody plant density is indistinguishable from 90% of the standard is as follows: 16