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Final West Elk Mine 2005 Annual Hydrology Report 21 Table 4 Summary otthe Ground Water Monitoring Program Monitored Station Water Level Measurement Field WQ iPH, cond, temp) Annual Lab Water Quality Period of Record Faeil' Area Wells and Alluvial Wells GP-3 MW-8 3 x Year 3 x Year Low Flow Period at 1985 to resent P-4 MW-9 3 x Year 3 x Year Low Flow Period esl 1985 to resent P-6 3 x Year 3 x Yeaz Low Flow Period (s) 1997 to resent P-7 3 x Year 3 x Year Low Flow Period RI 1997 to resent PE-1 3 x Year 3 x Year Low Flow Period cat 1996 to resent E-7 3 x Year 3 x Year Low Flow Period t~1 1999 to resent er D Fork Alluvial (n 3 x Year 3 x Yeaz Low Flow Period P) 10/03 to resent ower D Fork Alluvial to 3 x Year 3 x Year Low Flow Period °t 10/03 to resent Permit Area Wells cam feted in Barren Member above F Seam OM-80 3 x Year 3 z Year Low Flow Period l:i 1979 to resent SOM-13 3 x Year 3 x Year Low Flow Period es) 1979 to resent SOM-45-HI 3 x Year 3 x Year Low Flow Period tz) 1979 to resent SOM-45-H2 3 x Year 3 x Year Low Flow Period tzJ 1979 to resent 3-H-0 Baseline Baseline Baseline 2005 to resent Permit Area Wells cum feted in F Seam SOM-2-H 3 x Year 3 x Year Low Flow Period (zl 1981 to resent SOM-16-H 3 x Year 3 x Year Low Flow Period t~1 1981 to resent SOM C-76 3 x Year 3 x Year Low Flow Period (al 1978 to resent 3-H-3 Baseline Baseline Baseline 2005 to resent Permit Area Welk cum feted in E Seam 6-27-1 3 x Year 3 x Year Low Flow Period til 1996 to resent 3-11-1 O) 3 x Year 3 x Year Low Flow Period t't 10/03 to resent SOM-3E to 3 x Year 3 x Year Low Flow Period ts) 10/03 to resent 3-H-2 Baseline Baseline Baseline 2005 to resent Permit Area Welk cum feted above E Seam 6-2-2 3 x Year 3 x Year Low Flow Period ezt 1996 to resent Permit Area Welk cam feted in B Seam SOM-129-H 3 x Year 3 x Year Low Flow Period Isl 1993 to resent So. W-1 3 x Year 3 x Year Low Flow Period al 1996 to resent V-46 3 x Year 3 x Year Low Flow Period trt 1995 to resent 1-11-1 3 x Year 3 z Year Low Flow Period tat 2001 to resent SOM-3B lq 3 z Year 3 x Year Low Flow Period Pt 10/03 to resent 3-H-4 Baseline Baseline Baseline 2005 (suspect data (1) New wells installed in September 2003, baseline sampling from October 2003 m October 2004. (2) For sites with more than 5 years of data, lab parameters include TSS, TDS, Cond., pH, and Fe (diss & tot). (3) For sites with less than 5 years data, lab parameters include TSS, TDS, Cond., pH, Ca, Mg, Na, K, SAR, hardness, bicarb., CI, Nitrite/Nitrate, POo, SO,, Fe (tot &diss), Mn (tot &diss), Al, As (tot), Cd, Cu, Pb, Hg (tot), Mb, Se (tot), Bo, Zn I September 2006 HydraGeo, Inc.