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addition, if groundwater has the potential to flow into or out of the pit, then the suitability <br />of the quarry as an unlined reservoir is called into question. <br />The Applicant has not provided any information to substantiate the claim that the <br />observed water is part of a localized groundwater table. In order to satisfy the Division's <br />concerns, please provide copies of the borehole logs for the boreholes referenced in the <br />Brierley Associates' letter, as well as a borehole profile cross - section. In addition, provide <br />the Division with well data for the surrounding area or any other available information to <br />demonstrate the observed groundwater is not connected to the regional groundwater table. <br />See Brierley Associate's revised letter attached to this adequacy response. <br />3. The Summary of Groundwater Conditions at Ralston Quarry letter from Brierley <br />Associates stated there were temporary groundwater monitoring wells installed at borings <br />BA4 and BA-6. Please indicate if these temporary groundwater monitoring wells are still <br />in place and provide the Division with any available monitoring data from the wells. \ <br />Given that there is no ground water that will be encountered as part of the mining at the Ralston <br />Quarry, there is no need for monitoring data. <br />4. Please respond to the attached comments from Tim Cazier regarding the stability <br />analysis. <br />See the specific items and responses below. <br />Tim Cazier Item 1. <br />July 22, 2014 Letter, Section 1.2 — This could be just a matter of semantics, but the text: <br />"Brierley analyzed three- dimensional wedge failures that could occur based on various slope <br />configurations to achieve a minimum allowable FOS of 1.3 for wedge stability" implies analyses <br />were evaluated until the minimum FOS was achieved as opposed to evaluating multiple slope <br />configurations to ensure the lowest FOS was at least 1.3. Please confirm that no proposed,final <br />slope configurations were analyzed that resulted in a FOS less than 1.3. <br />See the April 2, 2015 Brierley letter attached to this response. <br />Tim Cazier Item 2. <br />July 22, 2014 Letter, Section 1.4 — Map C -4 created by Greg Lewicki And Associates <br />indicates there will be a north dipping bench (south highwall of the pit, Section B -B). The <br />results table in Section 1.4 of the July 22, 2014 Brierley letter does not provide results for a <br />north dipping analysis. Please address the FOS for the north dipping slope. <br />Map C -4 has been revised to reflect the April 2, 2015 Brierley letter. This letter incorporates data <br />for north dipping slopes. <br />2 <br />