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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 is found in Appendix E. Data for each site begins <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, and followed by remarks if <br />present. This is followed by a TDS regression plot using the LOWESS <br />method (see the Ground Water Quality section). A statistical report <br />representing baseline (i.e., premining) data for each site downstream of <br />mining (when available) is provided in Appendix E1 of the 2010 ARR. On <br />this statistics report, "censored data" refers to analytical values that <br />were below the detection limit, which were censored from the <br />min /max /mean calculations. The time frame for baseline conditions is <br />listed under "conditions specified" at the bottom of each page. <br />The following discussion of water quality will limit itself to a <br />description of TDS trends. A separate section, Comparison of Surface <br />Water Quality to Water Use Standards, will list those samples that <br />exceed water use standards. Lab samples are handled in a matter <br />identical to what was discussed earlier in the ground water section. For <br />the sake of brevity, the prefix that precedes all surface water site <br />names will often be dropped throughout this report. As an example, Site <br />SW- S2W -SG7 (WSH7) will be referred to as Site 7. <br />I0 <br />