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Hydrologic Monitoring Results 2007-2009 <br />During the 2007-2009 hydrologic monitoring years Colowyo performed all of the required <br />monitoring. The monitoring results are presented in Exhibit 2A (surface water) and 2B (ground <br />water) of the Annual Hydrologic Monitoring Report. Each of these exhibits includes the water <br />quality data for the current monitoring year as well as all of the historic water quality data. A <br />review of all of the data shows that none of the sites had any parameters that were outside the <br />historic ranges. The following chart shows the general trend for several key parameters for each <br />ground water and surface water site. (Note: I is an increasing trend and D is a decreasing trend.) <br /> <br />Site Field <br />pH3 Lab <br />pH3 <br />Cond a <br />TDSS <br />SO45 <br />Cas <br />Fes <br />Mgs <br />Nas <br />Flow6 <br /> <br />NUGSC D7 Is I I I I D I I I <br />LGSC I I I I D L9 I L I D <br />UWFGSC' D D D D D D I D D I <br />LTC I I I I I D I I I D <br /> <br />A6 D I I I D D D D I I <br />A72 L I D D D D L D D D <br />A82 D D I I I I D I I D <br />NGS Well D I I I I I D I I D <br />Gossard I D I I I I D I I I <br />MT-95-0210 D I D D I D D I I I <br /> <br />1: Sampling began in 4Q07 <br />2: Sampling began in 2Q08 <br />3: Standard Units <br />4: mmhos/cm <br />5: mg/L <br />6: cubic ft/sec (cfs) for flow. For ground water sites this is elevation to water. <br />7: The overall linear trend is decreasing <br />8: The overall linear trend is increasing <br />9: The overall linear trend is level <br />10: Sampling began in 1Q08 <br />As noted in the footnotes, the trends for ground water location UWFGSC and alluvial well sites <br />A-7, A-8 and MT-95-02 are based on very little data, as sampling was initiated in 2008. It is also <br />noted that in the chart there appears to be a discrepancy between the field pH and the lab pH for <br />several of the sites. This could be due to the fact that the instrumentation for field pH is not as <br />sensitive or stable as the laboratory instrumentation. It could also be due to the fact that the <br />laboratory holding time for pH is very short (usually 2 hours) so the laboratory pH is always <br />analyzed out of holding time. In no case were the pH values (either field pH or lab pH) for the