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West Elk Mine 2003 Annual Hydrology Report • Permit Area Wells completed in E Seam • Permit Area Wells completed above E Seam • Permit Area Wells completed in B Seam • Study Area Wells completed in F Seam The locations of the monitoring wells are shown on Map 2. A summary of the ground water system is presented in Table 4. A summary of the well installation data is shown in Table 5. 17 Table 4 Summary of Ground Water Monitoring C J Monitored Site Water Level Measurement Field WQ (pH, cond, temp) Annual Lab Water Quality Period of Record Facili Area Wells and Alluvial Wells P-3 M W-8 3 x Year 3 x Year Low Flow Period R) 1985 to resent P-4 MW-9 3 x Year 3 x Year Low Flow Period R) 1985 to resent P-6 3 x Year 3 x Year Low Flow Period Izl 1997 to resent P-7 3 x Year 3 x Yeaz Low Flow Period (Z) 1997 to resent E-1 3 x Year 3 x Year Low Flow Period (zl 1996 [o resent E-7 3 x Year 3 x Year Low Flow Period t'1 1999 to resent U er D Fork Alluvial (0 Baseline Baseline Baseline 10/03 to resent Lower Dr Fork Alluvial <D Baseline Baseline Baseline 10/03 to resent Permit Area Wells com leted in Barren Member above F Seam SOM-80 3 x Year 3 x Year Low Flow Period (z) 1979 to resent SOM-13 3 x Year 3 x Year Low Flow Period (~) 1979 to resent SOM-45-H I 3 x Year 3 x Year Low Flow Period c:l 1979 to resent SOM-45-H2 3 x Year 3 x Year Low Flow Period lal 1979 to resent Permid Area Wells com leted in F Seam SOM-2-H 3 x Year 3 x Year Low Flow Period (a) ] 981 to resent SOM-16-H 3 x Year 3 x Year Low Flow Period ca) 1981 to resent Permit Area Wells com leted in E Seam 6-27-t 3 x Year 3 x Year Low Flow Period t~l 1996 to resent 3-11-I (p Baseline Baseline Baseline 10/03 to resent SOM-3E (0 Baseline Baseline Baseline 10/03 to resent Permit Area Wells com feted above E Seam 6-2-2 3 x Year 3 x Year Low Flow Period 1~'I 1996 to resent Permit Area Wells com leted in B Seam SOM-129-H 3 x Year 3 x Year Low Flow Period t~1 1993 to resent So. W-I 3 x Year 3 x Year Low Flow Period t~1 1996 to resent V-46 3 x Year 3 x Year Low Flow Period 1zl 1995 to resent 1-11-1 3 x Year 3 x Year Low Flow Period i'I 2001 [o resent SOM-3B 1~) Baseline Baseline Baseline 10/03 to resent Slud Area Wells com leted in F Seam SOM C-76 3 x Year 3 x Year Low Flow Period tzl 1978 [o resent (l) New wells installed in September 2003 but no[ sampled until October 2003. These locations have no[ been surveyed. • {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., Cl, NitnteMitrate, P04, 504, Pe (tot &diss), Mn (tot &diss), Al, As (tot), Cd, Cu, Pb, Hg (tot), Mb, Se (tot), eo, Zn September 2004 HydroGeo, Inc.