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followed by a TDS regression plot using the LOWESS method (see the <br />Ground Water Quality section). <br />A statistical report representing baseline (i.e., premining) data for <br />each site downstream of mining (when available) is provided in Appendix <br />D1 of the 2010 AHR. On this statistics report, "censored data" refers to <br />analytical values that were below the detection limit, which were <br />censored from the min /max /mean calculations. The time frame for baseline <br />conditions is listed under "conditions specified" at the bottom of each <br />page. <br />Sa e Creek <br />- Site YSSF3. This site exists on Sage Creek upstream of all potential <br />Yoast Mine discharges. It displays a decreasing TDS trend. <br />- NPDESI2. Mining in this basin began in 2000. Reconstruction of the <br />water augmentation Pond Y1 (Site YSSF2) was completed on September 13, <br />1999. It is now referred to as Pond 012 (NPDESI2). This pond began to <br />flow again (after reconstruction) in April 2000. Flow at this pond is <br />continuous. The average flow value for this year was 0.2466 cfs, which <br />was 166% greater than the historic (2000 -2011) average for Pond 012, <br />0.0926 cfs, and was 91% greater than the Pond Yl's historic (1991 -1999) <br />flow value, 0.1293 cfs. The timing of when flow values are collected <br />affects these averages. A statistical summary of baseline chemistry data <br />from Site YSSF2 (Y1 outflow) and YSS3 (Y1 inflow) is provided in <br />Appendix D1 of the 2010 AHR. NPDESI2 exhibits a recently decreasing TDS <br />trend (SF 0.5), with the peak value occurring in July 2007. <br />A slide north of Pond 012 remains was repaired in 2010. An additional <br />pond, 012A, was constructed in August 2008 to compensate for the lost <br />capacity in Pond 012. <br />- NPDESI3. Construction of this pond was completed in December 2003. It <br />first began discharging on March 14, 2005. This year, this pond started <br />flowing in March and stopped flowing in July. One additional flow event <br />