GENERAL33770 - Laserfiche WebLink

Home Browse Search

-1U- ~i; IV, Geology-Rule 1.04.5 and 2.04.6(1) (cont'd) The applicant has provided a geochemical analysis of roof and floor material. It is indicated by the data which was supplied that the material is sodic in ! nature. The pH and sodium absorption ratio (SAR) of the material are high relative to preliminary Division standards. These conditions indicate that the material may be substandard as a plant growth medium. No problems are indicated by the soluble salt contents of the roof and floor material (see Tables 2.1-4 and 2.1-5 of Volume I of the application). Data was not provided for several other parameters which are required by the Division. Salt Creek Mining Company has committed to supplying these additional data. The Division will not allow the storage of these materials in a waste disposal pile until these data are submitted and it is determined that there will be no detrimental consequences. The site for the waste disposal pile in Munger Canyon has not been approved by the Division. Approval of this waste pile is contingent upon the approval of the Munger Canyon permit application. The Division will not allow place- ment of any roof fall material at this site until the site has been approved by the Division. For the reasons just mentioned the following stipulation is necessary: STIPULATION ql PRIOR TO THE TRANSPORT OF ANY ROOF FALL OR OTHER WASTE MATERIAL PRODUCED AT THE McCLANE CANYON MINE TO THE PROPOSED MUNGER CANYON CANYON DISPOSAL SITE THE FOLLOWSNG MUST OCCUR: 1) THE PERMITTEE MUST SATISFY ALL DIVISION REQUIREFlENTS FOR GEOCHEMSCAL ANALYSIS OF THE MATERIAL WITHIN 30 DAYS OF THE ISSUANCE OF THIS PROPOSED DECISION, AND 2) THE DIVISION MUST APPROVE THE PROPOSED MUNGER CANYON SITE FOR USE AS A WASTE DISPOSAL SITE. Salt Creek Mining Company has submitted an analysis of the coal to be mined. These data indicate the presence of some elements at higher than normal levels. The Division has determined, however, that there is very little possibility of adverse effects on the environment as a result of exposure of the coal in a surge pile on the mine bench. There are several reasons for this determination. The coal in the surge pile will be exposed to surface runoff for short periods of time. Material in the pile will normally be cycled within a day. There is therefore Little potential for excessive leaching of material in the pi1e.~ The area of the surge pile accounts for only 3.5 percent of the total disturbed area. This is approximately the ratio of contribution of leachate from the surge pile tc the runoff from the rest of the disturbed area. The leachate would be appreciably diluted in this case.