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AOZ Laboratories, Inc. <br />2773 Downhill Drive Steamboat Somas. CO 80487 MOO] 334 -5493 <br />Seneca Coal Company ACZ Sample ID: L11910 -02 <br />Project ID: 451129821 Date Sampled: 05106113 08:55 <br />Sample ID: NPDES4 Date Received: 05106113 <br />Sample Matrix: Surface Water <br />Metals Analysis. <br />•- <br />e <br />a <br />'R i <br />e <br />•� <br />a. <br />Calcium, dissolved <br />M200.7 ICP <br />1 <br />355 <br />mg/L <br />0.2 <br />1 <br />05/1011319:11 <br />aeb <br />Magnesium, dissolved <br />10200.7 ICP <br />1 <br />379 <br />mg/L <br />0.2 <br />1 <br />05/10/13 19:11 <br />aeb <br />Potassium, dissolved <br />M200.7 ICP <br />1 <br />6.6 <br />mg/L <br />0.3 <br />2 <br />05/10/13 19:11 <br />aeb <br />Selenium, dissolved <br />M200.8 ICP -MS <br />1 <br />8.4 <br />- <br />ug /L <br />0.1 <br />0.3 <br />05114113 4:12 <br />msh <br />Sodium, dissolved <br />M200.7 ICP <br />1 <br />71.9 <br />mg/L <br />0.3 <br />2 <br />05/10113 19:11 <br />aeb <br />Wet Chemistry <br />a <br />F <br />• <br />s <br />-F <br />a• - <br />Alkalinity as CaCO3 <br />SM2320B - Titration <br />Bicarbonate as <br />1 <br />330 <br />mg /L <br />2 <br />20 <br />05/09/13 0:00 <br />khw <br />Bicarbonate <br />Bicarbonate as <br />1 <br />270 <br />mg /L <br />2 <br />20 <br />05/09/13 0:00 <br />khw <br />CaCO3 <br />Carbonate as CaCO3 <br />1 <br />U <br />mg /L <br />2 <br />20 <br />05/09/13 0:00 <br />khw <br />Carbonate as <br />1 <br />U <br />mg /L <br />2 <br />20 <br />05/09/13 0:00 <br />khw <br />Carbonate <br />Hydroxide as CaCO3 <br />1 <br />U <br />ma /L <br />2 <br />20 <br />05/09/13 0:00 <br />khw <br />Hydroxide as <br />1 <br />U <br />mg /L <br />2 <br />20 <br />05/09/13 0:00 <br />khw <br />Hydroxide <br />Total Alkalinity <br />1 <br />270 <br />mg /L <br />2 <br />20 <br />05/09/13 0:00 <br />khw <br />Cation -Anion Balance <br />Calculation <br />Cation -Anion Balance <br />2.5 <br />% <br />0511 7/1 3 16:20 <br />talc <br />Sum of Anions <br />49.7 <br />meq /L <br />0.1 <br />0.5 <br />05117/1316:20 <br />calc <br />Sum of Cations <br />52.2 <br />meq /L <br />0.1 <br />0.5 <br />0511711316:20 <br />calc <br />Chloride <br />SM4500CI -E <br />1 <br />8 <br />mg /L <br />1 <br />5 <br />05/1311311:14 <br />mpb <br />Lab Filtration (0.45um) <br />M200.71200.8 <br />1 <br />05109/13 9:48 <br />dcw <br />& Acidification <br />Lab Filtration (glass <br />SOPWC050 <br />1 <br />05/07/13 9:29 <br />dcw <br />fiber filter) <br />Residue, Non- <br />SM25400 <br />1 <br />U <br />mg /L <br />5 <br />20 <br />05107/1316:26 <br />mss3 <br />Filterable (TSS) <br />@105C <br />Sulfate <br />D516- 02- Turbidimetric <br />100 <br />2100 <br />mg/L <br />100 <br />500 <br />0511511314:31 <br />bsu <br />REPIN.02.06.05.01 • Please refer to Qualifier Reports for details. <br />Page 3 of 21 <br />