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<br />WATER QUALITY ANALYSES AND SAMPLING FREQUENCY <br />I The samples are analyzed for the parameters listed on Table 4.6-54, <br />Section 4.6.8.4 of the permit. Sampling frequency at the various sites is <br />also listed on Table 4.6-54. Parameters measured in the field include: pH, <br />temperature, and specific conductivity. All other parameters measured are <br />analyzed for at an independent laboratory. Surface water data are <br />contained in Appendix A and ground water data are contained in Appendix B. <br />III. SDRFACE WATEA <br />1 GAUGING STATIONS <br /> Figure 1 shows the continuous streamflow records for Trout Creek at <br /> TR-a and TR-b. The graphs showing the results of the gauging station along <br />U <br />!!!! Trout Creek indicates that the monitoring program is being placed on-line <br /> early enough in the year to record flow prior to the peak runoff period for <br /> each year. The graphs show the monthly average flows and give some <br /> indication of the variability between mild winters (winters of less snow <br />~ accumulation) and harsh winters. The graph showing 1992-1994 data <br />~~ indicates a wide variation in the streamflow between 1993 and 1994. The <br /> 1984-1994 graph suggests that 1994 was the driest winter over the past <br /> decade and 1993 was the wettest. <br /> The streamflow records for 1989 and 1985 at TR-a on Trout Creek were <br /> lost due to a flood caused by an unusually rapid snowmelt during the spring <br /> of 1984. It was not until late summer of 1985 that the Trout Creek stream <br /> channel stabilized sufficiently to enable the re-installation of the <br /> gauging station. Although the magnitude of the 1984 flood was not able to <br /> be recorded in terms of flow, anomalies in the water chemistry were noted. <br /> The flow record for 1994 shows the peak flow to have occurred in May as in <br /> 1987 and 1992. The peak flow occurred in June of all other years. The <br /> early peak flow in 1987, 1992 and 1999 was probably due to milder winters <br /> with the on-set of warmer temperatures occurring earlier in the spring than <br /> normal. <br /> The stage/flow rating curve for TR-a was reviewed to ensure its <br /> continued accuracy in June of 1994. Sufficient differences in the channel <br /> 2 <br />