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10.0 Surface Water Quality Data <br />As mentioned in Section 9, surface water bodies are not present in the direct vicinity <br />of the Sunday Mines Group. <br />The affected areas of the mines are located on the south side of Big Gypsum Valley <br />approximately 1 /2 mile from an ephemeral drainage called Big Gypsum Creek, which <br />drains into the Dolores River several miles downstream of the affected areas. Surface <br />water is generally not present at the Sunday Mines Group, except during periods of <br />snow melt or in response to episodic precipitation events. In addition, the Sunday <br />Mines Group is located within an arid environment. The retained water is generally <br />not discharged from the mine site, because the water evaporates rapidly in the arid <br />environment present within Big Gypsum Valley. <br />According to the Denison Mines (USA) Corp, Sunday Mines, Environmental Assessment <br />CO 800 - 2007 104EA, water quality protection is currently and would continue to be <br />provided through the engineered stormwater drainage facilities and implementation <br />of the SWMP as required under the Denison s CDPS stormwater discharge permit <br />(COR- 040223). A copy of the environmental assessment can be available from BLM or <br />provided upon request. <br />Based on the distances from the nearest surface water body, the implementation of <br />stormwater BMPs, and the high evaporative potential, no surface water samples have <br />been collected at the Sunday Mines Group. <br />C \ Users \cwoodward\Desktop \ Sundays \FINAL - Environmental Protection Plan Sunday Mines Revised January 2012 docx <br />10 -1 <br />