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Laboratories, Inc. <br />2773 Downhill Drive Steamboat Spnngs, CO 80487 (800) 334 -5493 <br />Seneca Coal Company <br />Project ID: 451129821 <br />Sample ID: NPDES16 <br />ACZ Sample ID: <br />L11835 -05 <br />Date Sampled: <br />04130113 09:10 <br />Date Received: <br />04130113 <br />Sample Matrix: <br />Surface Water <br />Wet Chemistry <br />° <br />Alkalinity as CaCO3 <br />SM2320B - Titration <br />Bicarbonate as <br />137 <br />mg /L <br />2 <br />20 <br />05/03/13 0.00 <br />Ijr <br />Bicarbonate <br />Bicarbonate as <br />112 <br />mg /L <br />2 <br />20 <br />05/03/13 0:00 <br />Ijr <br />CaCO3 <br />Carbonate as CaCO3 <br />3 <br />B <br />mg /L <br />2 <br />20 <br />05/03/13 0.00 <br />Ijr <br />Carbonate as <br />U <br />mg /L <br />2 <br />20 <br />05/03/13 0.00 <br />Ijr <br />Carbonate <br />Hydroxide as CaCO3 <br />U <br />mg /L <br />2 <br />20 <br />05/03/13 0 00 <br />llr <br />Hydroxide as <br />U <br />mg /L <br />2 <br />20 <br />05/03/13 0.00 <br />Ijr <br />Hydroxide <br />Total Alkalinity <br />115 <br />mg /L <br />2 <br />20 <br />05/03/13 0 00 <br />ljr <br />Cation -Anion Balance <br />Calculation <br />Cation -Anion Balance <br />3.0 <br />% <br />05/10/13 0.00 <br />calc <br />Sum of Anions <br />6.5 <br />meq /L <br />01 <br />0.5 <br />05/10/13 0.00 <br />calc <br />Sum of Cations <br />6.9 <br />meq /L <br />0.1 <br />0.5 <br />05/10/13 0.00 <br />calc <br />Chloride <br />SM4500CI -E <br />2 <br />B <br />mg /L <br />1 <br />5 <br />05/07/1317:27 <br />Ihb <br />Lab Filtration (0.45um) <br />M200.7/200.8 <br />05/01/13 17.27 <br />las <br />& Acidification <br />Lab Filtration (glass <br />SOPWC050 <br />05/01/13 14:54 <br />mss3 <br />fiber filter) <br />Residue, Filterable <br />SM2540C <br />430 <br />mg /L <br />10 <br />20 <br />05/02/13 11:55 <br />mss3 <br />(TDS) @180C <br />Residue, Non- <br />SM2540D <br />72 <br />mg /L <br />5 <br />20 <br />05/01/13 13.45 <br />mss3 <br />Filterable (TSS) <br />@105C <br />Sulfate <br />D516 -02 - Turbidimetric <br />199 <br />mg /L <br />5 <br />30 <br />05/07/13 13 57 <br />Ihb <br />REPIN.02.06.05.01 * Please refer to Qualifier Reports for details <br />Page 9 of 24 <br />