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limitations and does not result in non - attainment of the applicable <br />selenium standard in the respective receiving streams. <br />Meteorological Data <br />Data from the National Climatic Data Center's Hayden Station is used <br />here to evaluate the precipitation trend. These data are provided in <br />Appendix Al. Precipitation data is summarized on Table 2. For this year, <br />17.58 inches of precipitation was measured, which is 0.95 inches (5°s) <br />below the 1981 -2010 average, 18.53 inches. All months except December, <br />April, August and September were below average. Snowpack runoff, as <br />estimated by totaling November through March precipitation values, was <br />6.71 inches, which was 0.80 inches (11 %) below the 1981 -2010 average, <br />7.51 inches. <br />Ground Water <br />Water Levels. Water level data are presented in Appendix B. The table of <br />contents of Appendix B indicates which wells carry PSCM monitoring <br />requirements (all other wells were required by the old Seneca II Mine <br />permit). Water level reports for data collected since 2004 are presented <br />immediately after the water level hydrograph of all historic data for <br />each respective well. By presenting all historic data, trends related to <br />seasonal and annual variability and possible mining related impacts are <br />more clearly evident. Table 3 (Summary of Ground Water Monitoring Wells) <br />is presented as a reference for the reader. No monitor wells were <br />completed or abandoned this year. The ground water monitoring program is <br />presented on pages 7- 341/342 of the Seneca II PAP and on Table 2.04.7 - <br />T9, page 2.04 -104 (Vol. 1) of the PSCM PAP. Water level measurements <br />obtained in non - flowing wells are taken with a water level indicator, or <br />in the case of a few shallow alluvial wells, directly from a steel tape. <br />Pressure readings (in psi) obtained from flowing wells with pressure <br />gages are multiplied by 2.31 to obtain head in feet. For the sake of <br />brevity, the prefix that precedes all well names will be dropped <br />throughout this report (except in the case of nested wells with a <br />3 <br />