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WHIRLWIND MINE <br />PUMP INSTALLATION AND TEST REPORT (FORM NO. GWS-32) <br />SUPPLEMENTAL INFORMATION SHEET <br />Well permit number 66419 applies to an underground mine sump, not an actual water well. As such, <br />much of the information requested in Forms GWS-31 and GWS-32 is not applicable to our mine sump. <br />The following supplemental information is intended to clarify areas where information is not applicable <br />and provide additional information that is applicable. <br />From late November 2007 to late January 2008, the mine was dewatered of accumulated mine water <br />using a pump that was previously installed by the previous mine operator. The specifications of this <br />pump are not available. An air-operated utility pump was installed in the mine sump in early February <br />2008 when the mine sump became accessible. Water is pumped along the mine decline and to a water <br />tank at the water treatment plant. The total run is approximately 3,460 feet long and increases 190 feet <br />in elevation. <br />The following information provides clarifications to Form GWS-32 on an item by item basis: <br />Item #4: The design flow is based on a vertical head of 190 ft plus a friction head of 35 feet and supplied <br />air pressure of 110 psig. The pump does not have any rated HP, Volts, or Full Load Amps. The design <br />head is based on 110 prig and the pump does not have a shaft as it is operated using diaphragms and <br />compressed air. <br />Item #5: The flow meter installed at the treatment plant is a Seametrics TX80 Series flow sensor <br />coupled with a Sea Metrics FT400 Series flow computer. <br />Item #6: There is no static water level in the sump as mine water is pumped out as it accumulates. The <br />estimated flow, based on a total of 225 feet of head and 110 psig, is 50 gpm. Actual flow measurements <br />at the water tank indicated an approximate flow rate of 55 gpm. The flow measurement was <br />determined by the amount of time to fill a vessel of known volume. <br />Item #7: No disinfection is required as the water is being pumped from the mine for mine dewatering <br />purposes and is not used as drinking or potable water. The mine water is treated to standards set forth <br />in our CDPS Permit (No. CO-0047562) prior to being discharged to the surface into the middle tributary <br />of Lumsden Creek. <br />Item #8: Please see the attached laboratory data of the untreated mine water. Mine water is treated in <br />accordance with standards set forth in the CDPS Permit prior to surface discharge. <br />Item #10: The pump was installed by mine personnel employed by Energy Fuels.