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Analytical <br /> AOZ Laboratories, Inc. Inorganic <br /> 2773 Downhill Drive Steamboat Springs, CO 80487(800)334-5493 Results <br /> Alexco Environmental Group (US) Inc. ACZ Sample ID: L45931-01 <br /> Project ID: Date Sampled: 07/27/18 00:00 <br /> Sample ID: SW AWD Date Received: 07131118 <br /> Sample Matrix: Surface Water <br /> Wet Chemistry <br /> •-1 7779 <br /> Alkalinity as CaCO3 SM2320B-Titration <br /> Bicarbonate as 1 101 mg/L 2 20 08/03/18 0:00 emk <br /> CaCO3 <br /> Carbonate as CaCO3 1 U mg/L 2 20 08/03/18 0:00 emk <br /> Hydroxide as CaCO3 1 U mg/L 2 20 08/03/18 0:00 emk <br /> Total Alkalinity 1 101 mg/L 2 20 08/03/18 0:00 emk <br /> Cation-Anion Balance Calculation <br /> Cation-Anion Balance -2.7 % 09/04/18 0:00 calc <br /> Sum of Anions 3.8 meq/L 09/04/18 0:00 calc <br /> Sum of Cations 3.6 meq/L 09/04/18 0:00 calc <br /> Chloride SM4500CI-E 1 43.9 mg/L 0.5 2 08/15/1811:02 wtc <br /> Cyanide,WAD SM4500-CN 1,E- 0.5 U mg/L 0.003 0.01 08/04/18 0:00 pjb <br /> Colorimetric w/distillation <br /> Fluoride SM450OF-C 1 0.39 mg/L 0.05 0.3 08/15/1811:49 enb <br /> Hardness as CaCO3 SM2340B-Calculation 140 mg/L 0.2 5 09/04/18 0:00 calc <br /> (dissolved) <br /> Nitrate/Nitrite as N M353.2-H2304 preserved 1 0.22 mg/L 0.02 0.1 08/17/18 23:06 pjb <br /> Phosphate,total Calculation based on total U mg/L 0.06 0.2 09/04/18 0:00 calc <br /> Phosphorus <br /> Phosphorus,total M365.1 -Auto Ascorbic 1 U mg/L 0.02 0.05 08/08/18 13:56 las <br /> Acid(digest) <br /> Residue,Filterable SM2540C 1 234 mg/L 10 20 08/01/18 13:42 oah <br /> (TDS)@180C <br /> Residue,Non- SM2540D 1 U mg/L 5 20 08/01/18 15:40 oah <br /> Filterable(TSS) <br /> @ 105C <br /> Sulfate D516-021-07-Turbidinnetric 1 26.9 * mg/L 1 5 08/16/1811:33 mss2 <br /> TDS(calculated) Calculation 200 mg/L 09/04/18 0:00 calc <br /> TDS(ratio- Calculation 1.17 09/04/18 0:00 calc <br /> measured/calculated) <br /> REPIN.02.06.05.01 *Please refer to Qualifier Reports for details. <br /> L45931-1809041520 Page 3 of 44 <br />