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Mid-Continent Resources, Inc. <br /> PRODUCERS OF THE FAMOUS COAL BASIN COKING COAL <br /> DIID-CONTINENT RESOURCES,INC. 201 Centennial Street <br /> 625 PLAINFIELD ROAD-SUITE 220 Suite 406 Telephone: <br /> WILLORBROOK,ILLINOIS 60521 Glenwood Springs, Colorado 81601 (303) 945-4958 <br /> June 30 , 1989 <br /> Pat Nelson <br /> Colorado Department of Health <br /> 4210 E. llth Ave. <br /> Denver, CO 80220 <br /> Dear Ms. Nelson: <br /> RE: Use of Alum for 016 ponds. <br /> As a follow-up to my conversation today with Sandy Marek, in which <br /> Mid-Continent requested permissions to use aluminum sulfate (alum) <br /> in the rock tunnel sediment ponds at Outfall 016, it is our <br /> understanding that your approval is suject to the following <br /> requirements: <br /> For two weeks following discharge, testing as follows: <br /> Daily for TSS. <br /> Every other day for dissolved aluminum. <br /> Within four days of discharge, we will perform an acute bio- <br /> monitoring test of the effluent. <br /> Mid-Continent's use of alum is intended for surface, rather than <br /> underground, water treatment. <br /> Should we decide on the use of alum for underground water <br /> treatment, we will seek permission from the Department of Health. <br /> Yours truly, <br /> Diane Delaney <br /> Mid-Continent Res. <br />