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AC3ZI-aboratories, Inc. <br /> 2773 Downhill Dnve Steamboat Springs, CO 80487(800)334-5493 <br /> Alexco Water& Environmental Inc. ACZ Sample ID: L50185-01 <br /> Project ID: Schwarzwalder Mine Date Sampled: 02126119 10:18 <br /> Sample ID: RAW FEED Date Received: 02127119 <br /> Sample Matrix: Groundwater <br /> Wet Chemistry <br /> Parameter EPA Method Dilution Result Qua[ XQ Units MDL PQL Date Analyst <br /> Alkalinity as CaCO3 SM2320B-Titration <br /> Bicarbonate as 1 705 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 1 705 mg/L 2 20 03/04/19 0:00 enb <br /> Cation-Anion Balance Calculation <br /> Cation-Anion Balance 7.9 % 09/23/19 0:00 calc <br /> Sum of Anions 41 meq/L 09/23/19 0:00 calc <br /> Sum of Cations 48 meq/L 09/23/19 0.00 calc <br /> Chloride SM4500CI-E 1 43.2 mg/L 0.5 2 03/01/1914:20 wtc <br /> Cyanide,WAD SM4500-CN 1,E- 0.5 U mg/L 0.003 0.01 03/05/19 14:40 ttg <br /> Colonmetric w/distillation <br /> Fluoride SM450OF-C 1 1.20 mg/L 0.05 0.3 03/05/1917:59 emk <br /> Nitrate/Nitrite as N M353 2-H2SO4 preserved 1 U mg/L 0.02 0.1 03/06/19 22:55 pjb <br /> Phosphate,total Calculation based on total 0.74 mg/L 0.06 0.2 09/23/19 0:00 calc <br /> Phosphorus <br /> Phosphorus,total M365 1-Auto Ascorbic Acid 1 0.24 mg/L 002 0.05 03/05/19 12-54 ttg <br /> (digest) <br /> Residue,Filterable SM2540C 2 2940 mg/L 20 40 02/28/19 15:40 mh <br /> (TDS)@180C <br /> Residue,Non- SM2540D 1 8.0 B mg/L 5 20 02/28/19 10.40 kja <br /> Filterable(TSS) <br /> @ 105C <br /> Sulfate D516-02/-07-Turbidimetnc 80 1210 mg/L 80 400 03/01/1916:13 wtc <br /> TDS(calculated) Calculation 2520 mg/L 09/23/19 0.00 calc <br /> TDS(ratio- Calculation 1.17 09/23/19 0.00 calc <br /> measured/calculated) <br /> REPIN.02.06.05.01 'Please refer to Qualifier Reports for details. <br /> L50185-1909231417 Page 4 of 34 <br />