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Documentation. This would suggest that as required, over 10% of the bond release block <br />exceeded the concentration area standard (as was confirmed in 2015 sampling, see below). <br />For informational purposes, data from the 2014 concentration area have been separated into <br />those from the fenced area (Supplemental Table C, Attachment E) and those from the planted <br />area that was unfenced (Supplemental Table D, Attachment E). Please refer to Map 3, 2014 <br />Phase III BRB-1 monitoring areas contained in Attachment D — Revegetation Success <br />Supporting Documentation. For the fenced area (Supplemental Table A, Attachment E), the <br />average total woody plant density of 6054 stems per acre far exceeds the required level of 945 <br />stems per acre under Secondary Standard S1. Even though the samples in the fenced area were <br />13, thirteen short of the requisite 30 for a formal test of the "reverse null hypothesis", the lower <br />90% confidence limit for the mean is 4799 stems per acre, so far in excess of the standard of 945 <br />that there is functionally very little doubt as to the validity of the conclusion that the standard <br />was exceeded. In addition, tall shrubs and trees averaged 174 stems per acre but no standard for <br />this component is required under Secondary Standard S1. Further sampling in 2015 addresses <br />the tall shrub and tree requirement and achievement of this requirement. The planted but <br />unfenced area (Supplemental Table D) shows that for that portion of the unfenced concentration <br />area where the mean was 4675 stems per acre that the standard of 1000 stems per acre was far <br />exceeded. The lower 90% confidence limit of 3851 stems per acre. Even with a sample size of <br />seventeen this leaves little doubt that the P2 standard was well -exceeded in this small unfenced <br />concentration planting area. <br />2015 Woodv Plant Densitv Success Evaluation <br />Woody plant density concentration area data were collected in Yoast Mine BRB-1 in 2015 both <br />from the Fenced Upland Shrub and Tree area (subject to standard S 1) and the unfenced woody <br />concentration areas (subject to standard P2). The latter areas included the planted but unfenced <br />area that was sampled in 2012 and 2014 along with the various areas where volunteer <br />establishment and growth of woody plants has been dense. These concentration areas total 72.4 <br />acres, or approximately 20% of BRB-1. <br />SL -6 - 22 <br />