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Martin Marietta Materials <br />Spec -Agg 2015 Annual Report <br />2.0 PURPOSE AND SCOPE OF WORK <br />The purpose of the annual evaluation is to monitor the influence the bedrock structural geology has on pit <br />wall stability as mining progresses. The data collected during this annual assessment was obtained <br />during site visits in June and December 2014, respectively. <br />The scope of this study is as follows: <br />• Observe recent rock mass exposures for large -scale instability and collect geologic rock structure <br />data. <br />• Document the orientation and character of rock mass discontinuities (e.g., joints, foliation and faults) <br />where recent exposures are accessible to supplement the existing structural geology database. <br />• Document groundwater observations at mapped locations. <br />• Photograph significant findings at the mapped rock mass exposures. <br />• Compare the new rock structure data collected during site visits in 2014 with the previously collected <br />data to identify potential changes to the previously analyzed discontinuity sets and possible new sets <br />that may need to be considered for the mine highwall structural discontinuity analysis. <br />• Based on the new rock structure data, update the rock structural discontinuity analyses for the final <br />mine highwall slopes. <br />• Summarize the field observations, mapping data, and structural discontinuity analyses results in an <br />annual report. <br />February 25, 2015 Page 2 Lachel & Associates, Inc. <br />Project 14364006.00 ©2015 All Rights Reserved <br />