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drilling fluids used when completing the well are reduced. The results of the samples <br />collected on 5-30-07 are all below the Agricultural Groundwater Standazds, with the <br />exception of Selenium (664 ug/1). <br />Also of note included in Table 2 are the results of samples taken from the sump Located in <br />the 1304 slope of the 7D-9 mine. The 1304 slope is located in the north central portion of <br />the mine, approximately 3000 feet up-dip from the JD-9 monitor well. Of particular <br />interest are the results for N as Nitrate + Nitrite (15.4 mg/l ), Sulfate (588 mg/1), and <br />Selenium (392 ugJl ), which are all significantly less than the results for these analytes in <br />the 5-30-07 samples from the JD-9 monitor well. <br />Another item of consideration regarding the JD-9 mine is the geology of the depositional <br />environment. The geochemistry of the Salt Wash member of the Morrison formation in . <br />the immediate vicinity of the JD-9 mine is a reducing environment which will limit the <br />mobility of any of the uranium and vanadium oxides which Wray end up getting dissolved <br />in the mine water. This is shown by the fact that the uranium-vanadium deposits are <br />located in this azea in the first place. <br />Attached is an excerpt from the Colorado Department of Public Health and the <br />Environment paper "Decision Analysis-Proposed Action to Renew License" for the <br />Umetco Uravan Facility which discusses the buffering effect that the Salt Wash shales <br />will provide for any seepage. The Salt Wash shales in the Bull Canyon azea around the <br />JD-9 mine should provide very similar buffering capabilities. <br />SPLP Test Results vs. Groundwater Results <br />When the results of the SPLP test results for the JD-9 waste material aze compared to the <br />JD-9 Monitor Well sample from 5-30-07 there is only one analyze which has results that <br />aze higher than the JD-9 Monitor Well results and the Agricultural Groundwater <br />Standards. The result for Arsenic (210 ug/1) is just over twice the Agricultural <br />Groundwater Standard of 100 ug/1. As was pointed out in the report "Evaluation of <br />Potential Contaminant Migation for Uranium Mining Operations at the JD-9 Mine" that <br />was previously submitted to the Colorado Division of Mining, Reclamation, and Safety, <br />the reduction in concentrations of the potential contaminants by the time they reached <br />this groundwater would be more on the order of a million rimes for pore water in the <br />unsaturated Zone. <br />Consequently it does not appear that any of the potential contaminants that could leach <br />from the mine waste pile would reduce the quality of the underlying groundwater. <br />Summary <br />In summary to date there has been no leachate showing up in the lysimeter located below <br />the JD-9 mine waste dump. Consequently I feel that the ultra conservative approach that <br />has been taken by Cotter Corporation shows that there is minimal potential for <br />contamination of the lower groundwater in this area from the mine waste pile. <br />Also the groundwater samples taken from the monitor well south of the JD-9 mine waste <br />dump do not appear to be influenced by the mine water that is in the JD-9 mine. As a <br />dmo7U-9 - 2 - <br />Ei/Z0 39dd d~~IIN dJO~ b3110J L8ZLV980L6 9Z~tt L00L/SiJ90 <br />