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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: L50149-02 <br /> Project ID: Date Sampled: 02125119 12:12 <br /> Sample ID: SW-WEIR Date Received: 02/26/19 <br /> Sample Matrix: Surface Water <br /> Wet Chemistry <br /> Parameter EPA Method Dilution Result Qual XQ Units MDL f --Date--- Analyst <br /> Alkalinity as CaCO3 SM2320B-Titration <br /> Bicarbonate as 1 80.3 mg/L 2 20 02/28/19 0:00 emk <br /> CaCO3 <br /> Carbonate as CaCO3 1 U mg/L 2 20 02/28/19 0:00 emk <br /> Hydroxide as CaCO3 1 U mg/L 2 20 02/28/19 0:00 emk <br /> Total Alkalinity 1 803 mg/L 2 20 02/28/19 0:00 emk <br /> Cation-Anion Balance Calculation <br /> Cation-Anion Balance -3.0 % 09/23/19 0-00 talc <br /> Sum of Anions 3.4 meq/L 09/23/19 0.00 calc <br /> Sum of Cations 32 meq/L 09/23/19 0:00 calc <br /> Chloride SM4500CI-E 1 26.9 mg/L 0.5 2 03/01/1910.25 wtc <br /> Cyanide,WAD SM4500-CN 1,E- 0.5 U mg/L 0.003 0.01 03/05/19 14:33 ttg <br /> Colorimetric w/distillation <br /> Fluoride SM450OF-C 1 0.36 mg/L 0.05 0.3 03/06/1911:42 emk <br /> Nitrate/Nitnte as N M353.2-H2SO4 preserved 1 U mg/L 0.02 0.1 03/13/19 0:08 pib <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 Aad(digest) 1 U mg/L 0.02 0.05 03/05/19 12:08 ttg <br /> Residue,Filterable SM2540C 1 194 mg/L 10 20 02/26/19 12.40 mh <br /> (TDS)@180C <br /> Residue,Non- SM2540D 1 U * mg/L 5 20 02/27/19 10:03 kja <br /> Filterable(TSS) <br /> @105C <br /> Sulfate D51"21-07-Turbidinnetnc 5 47.5 * mg/L 5 25 02/28/19 15:05 wtc <br /> TDS(calculated) Calculation 186 mg/L 09/23/19 0.00 calc <br /> TDS(ratio- Calculation 1.04 09/23/19 0.00 calc <br /> m eas u red/ca I cul a ted) <br /> REPIN.02.06.05.01 `Please refer to Qualifier Reports for details. <br /> L50149-1909231447 Page 6 of 35 <br />