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AraZ Laboratories, Inc. <br /> 2773 Downhill Drive Steamboat Springs, CO 80487(800)334-5493 <br /> Alexco Water& Environmental Inc. ACZ Sample ID: L50183-01 <br /> Project ID: Schwarzwalder Mine Date Sampled: 02127119 11:20 <br /> Sample ID: SUMPS COMP. Date Received: 02127119 <br /> Sample Matrix: Groundwater <br /> Wet Chemistry <br /> Parameter EPA Method Dilution Qual XQ Units MDLDate Analy4l <br /> Alkalinity as CaCO3 SM2320B-Titration <br /> Bicarbonate as 1 226 mg/L 2 20 03/04/19 0:00 enb <br /> CaCO3 <br /> Carbonate as CaCO3 1 U mg/L 2 20 03/04/19 0:00 enb <br /> Hydroxide as CaCO3 1 U mg/L 2 20 03/04/19 0:00 enb <br /> Total Alkalinity 1 226 mg/L 2 20 03/04/19 0:00 enb <br /> Cation-Anion Balance Calculation <br /> Cation-Anion Balance 0.0 % 09/23/19 0:00 calc <br /> Sum of Anions 11 meq/L 09/23/19 0:00 calc <br /> Sum of Cations 11 meq/L 09/23/19 0:00 calc <br /> Chloride SM4500CI-E 1 17.0 mg/L 0.5 2 03/01/1914:18 wtc <br /> Cyanide,WAD SM4500-CN 1,E- 0.5 U mg/L 0.003 0.01 03/05/19 14:37 ttg <br /> Colorimetric w/distillation <br /> Fluoride SM450OF-C 1 0.34 mg/L 0.05 0.3 03/06/1911:58 emk <br /> Nitrate/Nitrite as N M353 2-H2SO4 preserved 1 1.41 * mg/L 002 0.1 03/13/19 0.12 pjb <br /> Phosphate,total Calculation based on total U mg/L 0.06 0.2 09/23/19 0:00 calc <br /> Phosphorus <br /> Phosphorus,total M365.1 -Auto Ascorbic 1 U mg/L 0.02 0.05 03/07/19 15:26 ttg <br /> Acid(digest) <br /> Residue,Filterable SM2540C 1 670 * mg/L 10 20 03/01/19 10:37 emk <br /> (TDS)@180C <br /> Residue,Non- SM2540D 1 U mg/L 5 20 02/28/19 16.56 mh <br /> Filterable(TSS) <br /> @ 105C <br /> Sulfate D516-021-07-Turbidimetric 15 263 * mg/L 15 75 02/28/19 16:26 wtc <br /> TDS(calculated) Calculation 606 mg/L 09/23/19 0:00 calc <br /> TDS(ratio- Calculation 1.11 09/23/19 0:00 calc <br /> measured/calculated) <br /> REPIN.02.06.05.01 *Please refer to Qualifier Reports for details <br /> L50183-1909231509 Page 4 of 31 <br />