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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., pre- mining) data for each site downstream <br />of mining (when available) is provided in Appendix El of the 2010 AHR. <br />On this statistics report, "censored data" refers to analytical values <br />that 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 />Hubberson Gulch / Dry Creek <br />- Surface Water Site SW- S2W -SG9 (WSH9). This Hubberson Gulch site is <br />upstream of NPDESI7 and all other mine related discharges in the II -W <br />South Expansion area. Monitoring at this site began in August 1997. No <br />monitoring was performed in the 1999 calendar year, but was resumed in <br />2000. This site is monitored in June and September. This site displays a <br />stable TDS trend. <br />- NPDES 017 (NPDESI7). This site exists on Hubberson Gulch in the II -W <br />South Expansion area. Construction of Pond 017 began on October 14, 2002 <br />