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assuming access is granted by the well owners. Please determine access and add the <br />specific wells to Exhibit AB under heading VI. <br />Northfield Resnonse: Tables 1 and 2 are identified as surface and ground water. A copy of <br />the access letter and chart of specific wells is provided in Exhibit AB. <br />DRMS Response: The Division staff has reviewed the hydrologic monitoring plan in detail <br />including the characterization of the hydrologic environment and the prediction of impacts <br />to the hydrologic system, as amended, in the latest submittal. <br />The Division concurs with the surface water monitoring plan with only one exception, as <br />noted. Please add how flow will be measured under I.C. Sampling Procedure. <br />Under II. Groundwater Sampling, the Division notes the absence of an alluvial well for <br />monitoring downstream of the mine water dischazge pond. Given the proximity of the City <br />of Williamsburg water supply well, completed in the alluvium, the Division requires that an <br />alluvial well be located downstream of the mine water discharge at such a point to <br />accurately measure any changes to alluvial water due to mine water additions. This well <br />will also be the Point of Compliance as required by Rule 4.05.13(1)(b). Please locate this <br />well on the appropriate maps that show monitoring locations. As previously discussed, <br />this well is required to be monitored for the comprehensive list of constituents under Tables <br />1-4 of Regulation 41 of the Water Quality Control Division. This list was forwarded to you <br />via email and included in Exhibit AB as Tables 4 and 5. Please specifically identify by <br />name each ground water well to be monitored under section II. Groundwater <br />Sampling, including the new alluvial well Monitoring frequency for all bedrock ground <br />water wells will be quarterly water level and semi-annual water quality samples. <br />The Division generally agrees with the characterization of the bedrock ground water system <br />above the Ocean Wave coal seam. Information presented indicates tight formations, low <br />water yields, and a low likelihood of impact to domestic wells upgradient of the proposed <br />mine workings. However, predictions conclude that some impact could occur within 1000 <br />feet of the mined and subsided area. Review of the ground water well information, as <br />amended, indicates five wells, upgradient and completed in the overburden and one neaz the <br />coal seam, that could show some impact or dewatering from mining. These aze wells # <br />248239 (Zak), #248241 (Borne), #248248 (Popkess-Vawter), #222887(Seifert), and <br />#242062 (Minogue). Of the five, the Popkess-Vawter well is the closest to areas that will <br />be undermined and subsided, estimated at about 250 feet from the subsided azea. Also, on <br />the outside of the potential impact azea is # 248240 (Thompson) with a total well depth of <br />540 feet completed in the overburden. <br />Recent communication with residents indicates considerable concern regarding testing and <br />monitoring of the residents domestic wells. The Division believes those concerns aze valid <br />and while we believe that current information from these wells including static water level, <br />pumping rates, and pumping water level is important, we cannot demand that the residents <br />allow Northfield access to gather this information. Additionally, the Division believes that <br />the current private well monitoring plan and well mitigation plan proposed by Northfield is <br />