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• iii iii niiiiiiii iii <br />STATE • <br />OF <br />COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Depanmem of Natural Resources <br />I I I }Sherman 51., Room 21 S J+ <br /> <br />Dcnv~.•r, culorado ao?0 i ~~~~ <br /> <br />Phuno: 1 771 p 716hJ 567 II <br />FA% 11114713?-a106 <br /> DEPARTMENT OF <br /> NATURAL <br /> RESOURCES <br /> VIA FACSIMILE, HARD COPY TO FOLLOW Rnv Rnmer <br /> Governu. <br /> h~~es S. LUChhearl <br /> Execw~re Uuecior <br />May 13 , 1998 m~ch,e~ Is. E~nR <br /> Div~siun Direanr <br />Mr Mike Toelle <br />Holnam, Inc <br />4629 N Overland Trail <br />PO Box 1548 <br />LaPorte, CO 80535 <br />RE: Adequacy Review, Boettcher Quarry, File No. M-77-3423 <br />Technical Revision TR-003, Kiln Dust Disposal <br />Dear Mr.Toelle: <br />The Division of Minerals and Geology (DMG) received a co~~y of the <br />TCLP analysis of the kiln dust from Paul Thomsen yesterday. The <br />routine analysis indicates that some constituents of the :ciln dust <br />leachate exceed the basic standards for groundwater established by <br />the Colorado Department of Public Health and Environment. The Band <br />A quarry is located in a recharge zone for the Codell Sandstone, <br />which directly underlies the area to be backfilled with kiln dust. <br />If the Codell is a groundwater aquifer, and if kiln dust <br />contaminants mobilize into the formation, down gradient wells <br />completed in the aquifer will potentially be impacted. Therefore, <br />to complete our review, Holnam will need to demonstrate the <br />following: <br />1) If the Codell Sandstone is a groundwater aquifer <br />2) If there are actual or potential down gradient wells <br />completed in the Codell formation <br />3) If there are down gradient wells, will they be impacted by <br />contaminants leached from the kiln dust. <br />