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(on a scale of 0 to 1) was used, which gives maximum smoothing. This <br />plot is followed by a table listing historic TDS values and percent <br />milliequivalents for major ions. Finally, a statistical report <br />representing baseline (i.e., premining) data for each well (when <br />available) is presented in Appendix D1. On this statistics report, <br />"censored data" refers to analytical values that were below the <br />detection limit, which were censored from the min/max/mean calculations. <br />The time frame for baseline conditions is listed under "conditions <br />specified" at the bottom of each page. <br />- Alluvium. Three wells monitor the Hubberson Gulch alluvium. Well <br />WHAL6-2 is upstream of NPDES 006, but downstream of NPDES 016 and 017, <br />which began discharging in 2001 and 2003. Its TDS plot shows an <br />increasing trend. Well WHAL7-2 exists on Hubberson Gulch downstream of <br />mine discharges from NPDES 006, 016 and 017. Its TDS plot shows an <br />increasing trend. Well WHAL10 exists on 006 Gulch (a Hubberson Gulch <br />tributary) below NPDES 006. TDS values at this well display an <br />increasing trend. <br />One well monitors the 005 Gulch alluvium (tributary to Dry Creek). This <br />well, WDAL11, is normally dry. <br />Three wells monitor the Sage Creek alluvium. Well WSAL12, located on <br />Sage Creek adjacent to Surface Water Site SW-S2-FG4 (WSSF3), is <br />downstream of all mine discharges on Sage Creek. TDS values at this well <br />had been increasing since it was drilled in 1990. Well WSAL13 is located <br />below NPDES 009 on the northern Sage Creek tributary (this NPDES site, <br />constructed in 1991, started flowing for the first time ever in 1996). <br />Historically, this well displayed a stable TDS trend. There is often not <br />enough water to sample in this well, as was the case this year. Well <br />WSAL14 exists on the southern Sage Creek tributary below NPDES 015 <br />(constructed in August 1999, first flow February, 2000). Monitoring was <br />resumed at this well in May 1998 after being discontinued in October <br />1995. It displays a decreasing TDS trend. <br />5 <br />