Laserfiche WebLink
Memorandum in Response to Notice of Determination of Designation Mining Operation (DMO); DRMS File Numbers <br />M-1977-416, M-1978-039 HR, M-1977-285, M-1980-055 HR, M-1981-021 and M-1977-032. <br />Phase 1 to come to an agreement on the contents of the EPP, if required, prior to the start <br />of Phase 2. <br />As required under Rule 7.2.3(2), the EPP will be submitted within one year from the date <br />of the Notices received by Denison on February 8, 2008. However, if monitoring of <br />surface and groundwater is determined to be necessary, the five quarters of sampling will <br />have to begin at the six month juncture between Phase 1 and 2 and will then travel <br />beyond the one year period, lasting a total of twenty one months until final information <br />will be obtained. As a result, the EPP will be submitted without the benefit of the full <br />five quarters of data. _ <br />Deliverables ._e <br />The Sunday, West Sunday, Carnation and Topaz mines arej'all located within 2 miles of <br />~..~„~:_ <br />each other. Therefore, the site specific information for,these minesw>ill be similar in <br />t;,.~, <br />nature. In addition, documentation for this process,wlll likely be onerons.and reviews <br />may be time intensive. Based on this information, Denison proposes to provide the EPP <br />documentation for the Sunday, West Sunday~and~Topaz mines in one reportkfoi`mat for all <br />deliverables. <br />CONCLUSIONS <br />For the three limited impact mines operated'6 <br />ti <br />4 mines, representative samples (three each) i <br />taken and an Acid Base Accounting test (fron <br />-,, <br />access the acid-forming~p`otenfial,of the wastF <br />based on these sample}results, these three faci <br />designation under~Rule 1 ~1(14)(0)~~._ If the critE <br />1.. P-' ., <br />demonstrated, Denison will;continue wrth the <br />T Denison, the Carnation, St. Jude and Van <br />~.~ <br />om each: site (nine samples total) will be <br />a"certtfied laboratory) will be prepared to <br />rock at these sites. Denison believes that <br />ties will be exempt from DMO <br />na~for the exemption can not be <br />,,ompletion of EPPs for those mines. <br />The remaining three fac>~lities; tle~Sunday, West Sunday and Topaz mines are Regular <br />Operation Mines. Therefore, Denison: will commence preparation of an EPP for those <br />mines as,~egnired by the current designation. Denison proposes to prepare the EPP in <br />two general.~phases. These~phases will generally follow the requirements of an EPP as <br />established iri`'~Rule 6.4.20. ~~Phase 1 will consist of data collection required to adequately <br />characterize the~waste rock-`and ore and assess the regional geology and hydrogeology at <br />these sites specifically~,Phase 2 will be the finalization of the preparation of the EPP <br />based on the site specif c information obtained in Phase 1. Denison will evaluate the <br />information collected in Phase 1 to determine if there is enough information to <br />demonstrate that the exemption in Rule 7.2.6(1) should apply. <br />In Phase 1, Denison proposes the following steps to generate data for the preparation of <br />an EPP for the Sunday, the West Sunday and the Topaz Mines currently being <br />designated: <br />• Acid Base Accounting on representative waste rock samples (three from each <br />mine) to evaluate acid-forming potential. <br />9 <br />