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energy fuels coal, inc. <br />southfield mine • post office box 459 • florence, colorado 81226 - (719) 784 -6395 <br />May 30, 2014 <br />Mr. David Berry — Director <br />Division Reclamation Mining & Safety <br />1313 Sherman Street — Room 215 <br />Denver, CO 80203 <br />RE: Modification Notice for NOV No. CV- 2013 -002 <br />RECEIVED <br />JUN 0 5 2014 <br />Divi Mining & Sa tY ion; <br />Energy Fuels Coal, Inc. (EFCI) —Southfield Mine — Permit No. C- 1981 -014 <br />L'1 <br />Dear David Berry: <br />This is in response to the Division's Modification Notice for NOV No. CV- 2013 -002 dated and <br />effective March 25, 2014. <br />Accordingly, EFCI performed a well test on monitor well MW -NW wherein the measured volume <br />of one thousand five hundred (1,500) gallons of water was gravity fed into the MW -NW well casing via a <br />three (3) inch diameter rigid hose on April 30, 2014. The volume of 1500 gallons of water would fill the 6 <br />inch diameter x 353 ft depth of well casing 2.8 times if the well had been completely plugged at the <br />partial obstruction elevation. <br />Mr. Rob Zuber, DRMS inspector, attended and monitored the well test procedure and results <br />which he included in his April 30, 2014 Inspection Report. A stop watch was used for timing from when <br />the test water inlet valve was opened until all water flowing sounds had ceased flowing through the <br />lower portion of the well. The time from opening to closing of the water inlet valve was 12 minutes, 46 <br />seconds; the water continued to flow through the lower portion of the well for an additional 55 seconds <br />for a total of 13.68 minutes of water flow time. The calculated average flow rate down through the <br />partial obstruction in the well is 110 gallons per minute proving that MW -NW is a conduit of water flow <br />to the Southfield mine workings. It should be noted that only a 'seepage' of water flowing into the well <br />casing would be necessary for groundwater monitoring and sampling purposes. <br />Further, a like well test was performed previously on MW -NW on April 17, 2012. The test water <br />volume, the time and flow rate was approximately the same as the well test of April 30, 2014 indicating <br />that there has been no change in the status of MW -NW during that time period. <br />Since the function of the Monitor Well MW -NW is to monitor the mine workings as and when <br />they refill with water, we have also asked our groundwater specialist advisers, Bishop, Brogden & <br />Associates to review the historic and current test data and provide an opinion as to the connection of <br />the MW -NW borehole to the mine workings. A copy of their response is attached. <br />