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HYDROLOGIC MONITORING REQUIREMENTS FOR 2008 -2009 <br />DESERADO MINE - PERMIT NO. C- 1981 -018 <br />Monitoring Sample <br />Well Site Piezometer No. Monitored Stratum Frequency Parameters <br />Ground Water: <br />Qal -5 <br />N/A <br />White River Alluvium <br />Quarterly <br />Depth -to- water, pH, cond., Temp. <br />30-8M <br />Siltstone & Coal Facies <br />Annual <br />Full Suite (Attachment A) <br />310131 -7' <br />31 -7m <br />Siltstone & Coal Facies <br />Annual <br />Depth to water only <br />21012 -17 <br />2 -17U <br />Upper Sandstone Facies <br />Annual <br />Depth to water only <br />2 -17L <br />Lower Sandstone Facies <br />Annual <br />Depth to water only <br />TW2 -17M <br />Siltstone & Coal Facies <br />Annual <br />Depth to water only <br />21014 -20 <br />4 -20U <br />Upper Sandstone Facies <br />Annual <br />Depth to water only <br />4 -20L <br />Lower Sandstone Facies <br />Annual <br />Depth to water only <br />310122 -2 <br />22 -21- <br />Lower Sandstone Facies <br />Annual <br />Depth to water only <br />310122 -3 <br />22-30 <br />Upper Sandstone Facies <br />Annual <br />Depth to water only <br />22 -3M <br />Siltstone & Coal Facies <br />Annual <br />Depth to water, pH, conductivity, <br />temperature, dissolved iron, diss. <br />manganese, TDS <br />310129 -4' <br />29-4U <br />Upper Sandstone Facies <br />Annual <br />Depth to water only <br />29-4M <br />Lower Sandstone Facies <br />Annual <br />Depth to water <br />310130 -8' <br />30-8U <br />Upper Sandstone Facies <br />Annual <br />Depth to water only <br />30-8M <br />Siltstone & Coal Facies <br />Annual <br />Depth to water only <br />310131 -7' <br />31 -7m <br />Siltstone & Coal Facies <br />Annual <br />Depth to water only <br />310132 -7' <br />32 -7U <br />Upper Sandstone Facies <br />Annual <br />Depth to water only <br />32 -7M <br />Siltstone & Coal Facies <br />Annual <br />Depth to water only <br />32 -71- <br />Lower Sandstone Facies <br />Annual <br />Depth to water only <br />310133 -81 <br />33-8U <br />Upper Sandstone Facies <br />Annual <br />Depth to water only <br />33-81VI <br />Siltstone & Coal Facies <br />Annual <br />Depth to water only <br />33-81- <br />Lower Sandstone Facies <br />Annual <br />Depth to water only <br />These holes will be sampled and analyzed prior to mining through or bond release. Sampling will be limited to the middle facie <br />zone. <br />310131 -71- was sealed in 2001 following sampling and prior to being mined through. <br />310131 -7M was sealed in 2010. <br />310129 -4M was sealed in 2012 following sampling and prior to being mined through. <br />NOTE: All surface water monitoring has been discontinued since DRMS's approval of the amendment in August 1997 (TR47). <br />Monitoring Wells 22 -2L, 22 -3M, and 22 -3U were added to the monitoring requirements with Permit Revision #6 starting with the <br />2008 -2009 hydrologic year. <br />A -1 <br />