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TR -43 AdequacyRespouses Page 3 Au" 25.2015 <br />EFCI resp= <br />Resolved, previous response accepted by the DRMS <br />1) c) iii) DRMS concern <br />Please provide a discussion of well MW16 explaining the fact that the recorded water level <br />dropped below 120' below ground surface (bgs) numerous times between 1979 and 2000, but that <br />since 2000 the well has often been reported as dry with the depth to water indicated as 110' bgs <br />(according to Exhibit 25, the depth of MW16 is 136' and the screened interval is from 106-1361) <br />EFCI response <br />Resolved, previous response accepted by the DRMS <br />1) c) iii) -cont. DRMS concern <br />The mine refilling projections made by BBA in the 2013 Summary Report are a valuable attempt <br />to understand the current hydrogeologic situation at Southfield, but the conclusions should be <br />validated using data from a monitoring well completed in the mine workings, if such data is <br />feasible to collect The data may suggest alternative refilling scenarios to consider, and will be <br />pertinent to landowners with an interest in the availability of groundwater resources The data <br />could be supplied by MWNW if it proves possible t• remove the "blockage", or by a new well; <br />these are the abatement options for NOV CV -2013-002, and are in accordance with the currently <br />approved water monitoring plan The Division does not intend to extend the scope of the water <br />monitoring plan in the future, (in the form of additional wells, for example). <br />If a replacement well is to be drilled EFCI should submit a plan to the Division before any work <br />is undertaken, detailing the proposed location and construction. <br />If the well is found to be dry a single measurement would suffice If water is encountered EFCI <br />should collect data from the well in accordance with the requirements of the <br />approved water monitoring plan and of rule 2.04.7(1). <br />Following the abatement of NOV CV 2013-002 EFCI should update Exhibit 25 with an MR. <br />EFCI response <br />NOV CV -2013-002 was vacated by the DRMS on July 31, 2015. Accordingly, the blockage in MWNW <br />will not be removed, nor will a replacement well be drilled, pending final resolution of the decision to <br />vacate the NOV. <br />Monitoring of MWNW in its existing condition will continue in accordance with the approved <br />monitoring plan. Not withstanding the unlikely event of water being detected in MWNW, the mine <br />filling projections made by BBA in the referenced 2013 Summary Report remains as the analysis of <br />record describing the current hydrogeologic situation at the Southfield Mine. <br />Exhibit 25, and other pages that reference hydrologic monitoring, are revised as part of this request to <br />approve TR -43, with MWNW remaining in its present condition. A preface is added to Exhibit 25 <br />