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AraZ Laboratories, Inc. <br /> 2773 Downhill Drive Steamboat Springs, CO 80487(800)334-5493 <br /> Alexco Environmental Group(US) Inc. ACZ Sample ID: L44736-05 <br /> Project ID: Date Sampled: 05/31/18 12:29 <br /> Sample ID: SW-AWD Date Received: 06106118 <br /> Sample Matrix: Surface Water <br /> Wet Chemistry <br /> DilutionParameter EPA Method Qual X0 Units MDLDate Analyst <br /> Alkalinity as CaCO3 SM2320B-Titration <br /> Bicarbonate as 1 51.4 mg/L 2 20 06/12/18 0:00 ecc <br /> CaCO3 <br /> Carbonate as CaCO3 1 U mg/L 2 20 06/12/18 0:00 ecc <br /> Hydroxide as CaCO3 1 U mg/L 2 20 06/12/18 0:00 ecc <br /> Total Alkalinity 1 51.4 mg/L 2 20 06/12/18 0:00 ecc <br /> Cation-Anion Balance Calculation <br /> Cation-Anion Balance -2.2 % 06/26/18 0:00 calc <br /> Sum of Anions 2.3 meq/L 06/26/18 0:00 calc <br /> Sum of Cations 2.2 meq/L 06/26/18 0:00 calc <br /> Chloride SM4500CI-E 1 36.0 mg/L 0.5 2 06/12/1811:52 las <br /> Cyanide,WAD SM4500-CN 1,E- 0.5 UH mg/L 0.003 0.01 06/16/18 0:26 pjb <br /> Colorimetric w/distillation <br /> Fluoride SM450OF-C 1 0.35 mg/L 0.05 0.3 06/15/1816:06 enb <br /> Hardness as CaCO3 SM2340B-Calculation 82 mg/L 0.2 5 06/26/18 0:00 calc <br /> (dissolved) <br /> Nitrate/Nitrite as N M353.2-H2SO4 preserved 1 U mg/L 0.02 0.1 06/14/18 23:18 pjb <br /> Phosphate,total Calculation based on total U mg/L 0.06 0.2 06/26/18 0:00 calc <br /> Phosphorus <br /> Phosphorus,total M365.1 -Auto Ascorbic 1 U mg/L 0.02 0.05 06/13/18 13:25 djp <br /> Acid(digest) <br /> Residue, Filterable SM2540C 1 164 mg/L 10 20 06/06/18 14:12 kja <br /> (TDS)@180C <br /> Residue, Non- SM2540D 1 U mg/L 5 20 06/07/18 12:42 kja <br /> Filterable(TSS) <br /> @ 105C <br /> Sulfate D516-02/-07-Turbidimetric 1 9.9 mg/L 1 5 06/15/18 15:36 VAC <br /> TDS(calculated) Calculation 121 mg/L 06/26/18 0:00 calc <br /> TDS(ratio- Calculation 1.36 06/26/18 0:00 calc <br /> measured/calculated) <br /> REPI N.02.06.05.01 *Please refer to Qualifier Reports for details. <br /> L44736-1806261505 Page 8 of 57 <br />