Laserfiche WebLink
S. Shuey Page 2 of 2 <br />May 28, 2003 <br />groundwater to the north of the mining area will be controlled by the installation of two trenches south <br />of the plume, which will be filled with water to provide a positive hydraulic head to prevent <br />contamination from entering the dewatering pits. Contaminated soil will be removed from the mining <br />area to landfarms for treatment outside the permit boundary. Existing dissolved groundwater <br />contamination at the site is minimal (low levels of benzene, no RCRA metals above State groundwater <br />standards), is orders of magnitude below the Colorado Discharge Permit limits issued for the site, and <br />will likely be remediated by aeration during pumping. <br />In summary, implementation of this revised mining plan as designed, and management and monitoring <br />of contaminated media during mining as required in accordance with the Waste Management <br />Contingency Plan (WMCP) and the Colorado Discharge Permit, should allow mining to proceed with <br />little chance of adverse impact. In fact, mining should result in significant clean up of the area with the <br />removal of contaminated soil for treatment. Additionally, a portion of the revenues generated from the <br />gravel mining will be deposited into the existing Escrow Account for the site that is administered by the <br />Department and will be used to clean up other portions of the refinery. We believe, therefore, that <br />gravel mining is appropriate for the site, can proceed and be managed in an environmentally sound <br />manner under this revised plan, and that the operations will not only aid the overall cleanup of the <br />refinery, but will be beneficial to the community in general. <br />The Department appreciates the opportunity to have reviewed this application. If you have any <br />questions or require any additional information, please do not hesitate to contact me at (303) 692-3376. <br />Sincerely, <br />Teresa J. Bennett <br />Hazardous Waste Corrective Action Unit <br />Compliance Program <br />Attachment <br />Cc: Harold Elam, Elam Construction, Inc. <br />Keith Holder, FMM <br />Greg Lewicki, Lewicki and Associates <br />David Kreutzer, Colorado AGO <br />Chris Gates, CDPHE/WQCD <br />Walter Avramenko, CDPHE/HMWMD <br />Paul Creeden, CDOW <br />