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Surface Water <br />A summary of surface water monitoring sites and sampling history is <br />presented in Table 8. Tables 9a and 9b show the new (2010) surface water <br />parameter lists. At Seneca II -W, all stream sites (unless otherwise <br />noted) are monitored for flow and field parameters (flow, temperature, <br />pH, and electrical conductivity) and one of the new surface water <br />parameter lists during spring runoff and summer baseflow. All six NPDES <br />sites are monitored monthly for NPDES parameters and field parameters. <br />Springs are monitored annually (May -July) for flow, field parameters, <br />and, if flow exceeds five gpm (0.011 cfs), one of the new surface water <br />parameter lists. Monitoring frequencies for surface water sites may be <br />found in Table 1 of Appendix 15-3a in the Seneca II -W PAP. <br />All surface water data are found in Appendix E. Data for each site begin <br />with a flow hydrograph of all historic data (plus an annual hydrograph <br />for NPDES sites), followed by a listing of individual water quality and <br />quantity data for the current water year, followed by an instantaneous <br />flow measurement report, and followed by remarks if present. This is <br />followed by a TDS regression plot using the LOWESS method (see the <br />Ground Water Quality section). A statistical report representing <br />baseline (i.e., pre -mining) data for each site downstream of mining <br />(when available) is provided in Appendix E1 of the 2010 AHR. On this <br />statistics report, "censored data" refers to analytical values that were <br />below the detection limit, which were censored from the min/max/mean <br />calculations. The time frame for baseline conditions is listed under <br />"conditions specified" at the bottom of each page. <br />The following discussion of water quality is limited to a description of <br />TDS trends. A separate section, Comparison of Surface Water Quality to <br />Water Use Standards, will list those samples that exceed water use <br />standards. Lab samples are handled in a matter identical to what was <br />discussed earlier in the ground water section. For the sake of brevity, <br />the prefix that precedes all surface water site names will often be <br />dropped throughout this report. As an example, Site SW-S2W-SG7 (WSH7) <br />will be referred to as Site 7. <br />12 <br />