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Colowyo Coal Company, L.P. Water Quality Data 1962.2004 Lower Good Spring Creek CGLGWYO MINE LGSC (LGSC) Listing of Stream Lab Data Flow Field Field Field Lab Lab TDS NO3 NO2 NO3+NO2 NH3 Total Bicarb Ambig. SW Ambig. SW Ambig. SN Ambig. SN Ambig. SN Ambig. SN Ambig. SN Ambig, SN Ambig. SN Ambig. SW No datum =>Slank Rate pH Temp Conduct pH Conduct -180 TSS asN asN asN asN P as CaC03 Sulfate As Ca Fe Pb Mg Mn Hg Se Na Zn cfs S.U. deg C umhdcm S.U. umho/cm mg4 mg/I mg/I mg/I mg/I mgp mg/I mg/l mgll mgll mg/I mg/I mg8 mg4 mg/l mgll mgB mg/I mgB Sfatistles Mean 4.28 B.O6 9.43 7651.77 8.00 1697.39 1337.52 6fi.38 142 0.01 2.54 0.12 O.Ofi 398.fi9 66740 0.00 742.17 0.60 0.03 74767 0.72 0.00 0.01 72.19 0.02 Sttl. Dav. 5.50 0.42 6.05 377.23 0.23 321.53 360.66 268.45 0.82 0.01 2.28 0.24 0.07 77.25 760.58 0.00 25.41 0.63 0.03 2887 0.06 0.00 0.00 25.93 0.03 Coef. Var. Range 4fi.94 4.7 25.fi 2160 2.d 2659 3330 3698 3.77 0.04 7.99 2.25 0.495 572 685 0.0174 140 4.26 0.199 149.4 0.375 00009 0.029 744.3 0.195 Max 47 9.3 25 2900 8.5 2020 4050 3700 4.7 0.05 8.29 2.26 0.5 602 945 0.018 208 4.27 0.2 226 0.32 0.001 0.03 764 0.2 Min 0.06 4.6 -0.6 740 6.1 761 720 2 0.33 0.01 0.3 0.01 0.005 30 260 00006 68 0.03 0.001 76.6 0.005 0.0001 0.001 19.7 0.005 Max at 427/1998 ii/i 011997 7/26/7982 10/3/1996 8/19/ 1997 7/19/1993 17/8/2000 4/30/7985 17/28/7989 5!//2001 12/26/1985 12/14/1989 1!7/1999 70242002 72/4/7989 4!111982 1288/1989 427/7998 5/1721101 12/4/1989 4/7/1982 2/162004 1014/1989 1 0/8/1998 70/1/2000 Min at 71/6/7999 7/82002 12/18/ 1996 d/5I2002 5/76/ 1997 623/1992 523/7995 9/30/1994 8108004 11/1 2004 8117/1992 8H02004 9l1 t1t997 SIt411992 58N1997 tt/18004 31131t98d 2/111988 1 1/58001 52015997 )Pd172000 61117993 9202001 A717800D 828(7985 p Of Sample=. 257 201 247 207 282 266 727 279 dt 37 92 96 97 107 107 107 740 174 707 147 105 107 107 109 107 Station Sample Fiow Field Field field Lab Lab TDS NO3 NO2 NO3*N02 NH3 icfal Sicarb Ambig. SW Ambig. SW Ambig. SN Ambig. SN Ambig. SN Ambig. SN Ambig. SN Ambig. SN Ambig. SN Ambig. SW Nama Dale Rate pH Temp Conduct pH Conduc[ -780 TSS as N as N es N as N P as CaC03 Sulfate As Ca Fe Pb Mg Mn Hg Se Na Zn cis S.U. dagC umha/cm S.U. umho/cm m9ll ng/I mg/I mg/I mg4 mg/I mg/I mg(I mgfl mgll mg0 mgll mg8 mH0 mgB mgll mgB mgil mgB LGSC 7/72003 3.77 B.1 13.9 7910 8.3 1930 5 757 172 LGSC e/7/2003 0.42 7.9 73.8 2320 7.9 2270 7770 6 0.83 0.01 0.83 0.2 0.05 602 820 0.00133 154 0.25 O.Od 164 0.137 0.0002 0.001 1fid 0.01 LGSC 922003 0.55 8 12.2 2380 0 2370 70 182 171 LGSC 1082003 3.2 7.9 8.4 22811 B.7 1700 5 154 170 LGSC 77/112003 6.05 7.7 3.5 2340 7.7 2080 7820 6 0.57 0.01 0.57 0.05 0.03 488 93D 0.0007 105 0.36 0.04 799 0.187 0.0002 0.004 103 0.03 LGSC 12/112(103 4.38 8 3 2240 8 7690 5 776 777 LGSC 1/212004 3.T/ 7.4 2.2 2170 8 2080 fi 175 776 LGSC 7/1fi2004 3.48 B.2 1.3 7900 7.9 1870 1fi60 16 1.73 0.01 1.13 0.13 0.03 497 810 0.0007 177 0.62 0.06 174 0.221 0.007 0.005 95.8 0.01 LGSC 3/11/2004 3.2 82 4.7 2000 8 1870 B 167 155 LGSC 4/52004 2.15 8.3 8 1860 8.1 7800 10 149 146 LGSC 5/42006 2.39 8.5 8.6 1920 8.1 1740 1470 5 0.74 001 0.73 0.1 0.03 455 730 0.0007 146 0.29 0.04 153 0.118 0.0002 0.004 88 0.01 LGSC 6/172004 1.97 8.7 11.3 1930 7.9 1780 5 145 158 LGSC 7/192004 3.48 8.5 16.2 1910 8.1 7840 50 166 167 LGSC 8/70/2004 1.28 7.9 12.3 2090 8 7880 7650 18 0.33 0.9t 0.34 0.06 0.07 543 770 0.001 751 0.48 0.04 167 0.24 0.0002 0.003 104 0.01 LGSC 9/ifi/2005 L28 7.9 9.5 2230 7.9 1850 76 780 778 LGSC 70/52004 2.92 8 8 2780 8.7 1830 14 157 769 LGSC 71/1/2004 4.7 B 3.3 2700 8 1800 7600 5 0.97 0.01 0.91 0.07 000 450 790 00006 131 0.42 0.04 149 0.261 0.0002 0.004 93.7 0.01 LGSC 72/142004 3.06 8 2 2248 8.1 2010 5 157 162 CF 17.14 2006 LGSC04.xls 38/200570:03 AM