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the well casing has prevented sampling since October 2001. Due to safety <br />concerns because of its proximity to the highwall, WWC4 was abandoned in <br />August 2003. Well WWC24 was drilled in August 2001 in the II-W South <br />area. Only five samples were collected. This well failed due to a <br />landslide that occurred in April 2003. A replacement well, WWC25, was <br />drilled in September 2004. <br />- Wolf Creek Overburden/Underburden. Wells WWCOV24 (overburden) and <br />WWCU24 (underburden) were drilled in August 2001 in the II-W South area. <br />Only five samples were collected for each well. These wells failed due <br />to a landslide that occurred in April 2003. Replacement wells, WWCOV25 <br />and WWCU25, were drilled in September 2004. <br />- Trout Creek Sandstone. Well WTC201 is used as the water supply well <br />for the mine facilities. Zt displays an increasing TDS trend; however, <br />the peak TDS value occurred in June 1999. <br />Comparison of Ground Water Quality to Water Use Standards. SCC has <br />compiled a list of ground water standards for agricultural uses (Table <br />5). This list is composed of Colorado Department of Health ground water <br />standards (CDOH, Reg. 41, November 2004). <br />Table 6 provides a comparison of ground water quality to agricultural <br />standards. This Paradox database generated table does not include the <br />units of concentration (mg/1 or ug/1) for each parameter. The units used <br />for each parameter are the same as those listed on the standards table <br />(Table 5) and are also the same as those used in the water quality <br />reports. The frequency column on Table 6 indicates the number of <br />exceedences out of the total number of samples (i.e., 1/2 indicates one <br />exceedence out of two samples) . Below is a summary of standards that <br />were exceeded. Given in parenthesis is the source and use of each <br />standard. <br />u <br />10 <br />