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HYDROLOGIC MONITORING REQUIREMENTS FOR 2006-2007 <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 N/A White River Alluvium Quarterly Depth-to-water, pH, cond., Temp. <br /> Annual Full Suite (Attachment A) <br />21012-17 2-17U Upper Sandstone Facies Annual Depth to water only <br /> 2-17L Lower Sandstone Facies Annual Depth to water only <br /> TW2-17M Siltstone & Coal Facies Annual Depth to water only <br />310129-4' 29-4U Upper Sandstone Facies Annual Depth to water only <br /> 29-4M Lower Sandstone Facies Annual Depth to water, pH, conductivity, <br /> temperature, dissolved iron, diss. <br /> manganese, TDS <br />21014-20 4-20U Upper Sandstone Facies Annual Depth to water only <br /> 4-20L Lower Sandstone Facies Annual Depth to water only <br />310130-8' 30-8U Upper Sandstone Facies Annual Depth to water only <br /> 30-8M Siltstone & Coal Facies Annual Depth to water only <br />310131-7' 31-7m Siltstone & Coal Facies Annual Depth to water only <br />310132-7' 32-7U Upper Sandstone Facies Annual Depth to water only <br /> 32-7M Siltstone & Coal Facies Annual Depth to water only <br /> 32-7L Lower Sandstone Facies Annual Depth to water only <br />310133-8' 33-8U Upper Sandstone Facies Annual Depth to water only <br /> 33-8M Siltstone & Coal Facies Annual Depth to water only <br /> 33-8L Lower Sandstone Facies Annual 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 />NOTE: All surface water monitoring has been discontinued since DMG's approval of the amendment in August 1997 (TR47). <br />A-1 <br />