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West <br />The water quality data have been compared to Colorado water quality standards (Colorado Water <br />• Quality Control Commission [WQCC]) for recreation, aquatic life, agricultural, and water supply <br />uses for segment 2 of the North Fork. A summary of the parameters which exceeded Colorado <br />water quality standards for surface waters is shown, along with the sampling date, in Table 18. <br />As shown in this table, the pazameter most frequently exceeded was total iron. The frequency <br />with which this parameter was exceeded indicates the prevalence of naturally-occurring sources <br />of iron in the area. Other pazameters that exceeded standards include total manganese, dissolved <br />iron, and pH. The causes for these standazd exceedances aze either natural or related to activities <br />not associated with the West Elk Mine, since there are no mining activities at the regional sites <br />shown in Table 18. <br />n <br />U <br />• <br />2.~4-1 ~7 Revised November 2004 PR70 <br />