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AOZ Laboratories, Inc. <br /> 2773 Downhill Drive Steamboat Springs, CO 80487(800)334-5493 <br /> Alexco Environmental Group (US) Inc. ACZ Sample ID: L48390-03 <br /> Project ID: Date Sampled: 11120118 11:00 <br /> Sample ID: SUMP 10 Date Received: 11121118 <br /> Sample Matrix: Groundwater <br /> Wet Chemistry <br /> Parameter EPA Method Dilution Result Qual XO Units MDL POL Date <br /> Alkalinity as CaCO3 SM2320B-Titration <br /> Bicarbonate as 1 233 mg/L 2 20 11/28/18 0:00 emk <br /> CaCO3 <br /> Carbonate as CaCO3 1 U mg/L 2 20 11/28/18 0:00 emk <br /> Hydroxide as CaCO3 1 U mg/L 2 20 11/28/18 0:00 emk <br /> Total Alkalinity 1 233 mg/L 2 20 11/28/18 0:00 emk <br /> Cation-Anion Balance Calculation <br /> Cation-Anion Balance 0.0 % 12/10/18 0:00 calc <br /> Sum of Anions 9.8 meq/L 12/10/18 0:00 calc <br /> Sum of Cations 9.8 meq/L 12/10/18 0:00 calc <br /> Chloride SM4500CI-E 1 20.6 mg/L 0.5 2 12/07/1811:21 mss2 <br /> Hardness as CaCO3 SM2340B-Calculation 424 mg/L 0.2 5 12/10/18 0:00 calc <br /> (dissolved) <br /> Nitrate/Nitrite as N M353.2-H2SO4 preserved 1 1.43 mg/L 0.02 0.1 12/07/18 0:05 pjb <br /> Phosphorus,total M365.1 -Auto Ascorbic 1 0.02 B mg/L 0.02 0.05 12/05/18 21:54 pjb <br /> Acid(digest) <br /> Residue, Filterable SM2540C 1 630 mg/L 10 20 11/26/18 18:19 nmc <br /> (TDS)@180C <br /> Sulfate D516-02/-07-Turbidimetric 10 216 * mg/L 10 50 11/30/1810:34 Wtc <br /> TDS(calculated) Calculation 555 mg/L 12/10/18 0:00 calc <br /> TDS(ratio- Calculation 1.14 12/10/18 0:00 calc <br /> measured/calculated) <br /> REPIN.02.06.05.01 *Please refer to Qualifier Reports for details. <br /> L48390-1812101108 Page 5 of 28 <br />