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AOZ Laboratories, Inc. . - ; <br /> 2773 Downhill Drive Steamboat Spnngs, CO 80487(800)334-5493 <br /> Ouray Silver Mines ACZ Sample ID: L43205-03 <br /> Project ID: 153178 Date Sampled- 03114118 16:20 <br /> Sample ID: GW-213 Date Received: 03/16/18 <br /> Sample Matrix: Ground Water <br /> Wet Chemistry <br /> Parameter EPA Method Dilution Result QualUnits UDLDate Ana"t <br /> Alkalinity as CaCO3 SM2320B-Titration <br /> Bicarbonate as 1 31.1 mg/L 2 20 03/19/18 0 00 enb <br /> CaCO3 <br /> Carbonate as CaCO3 1 U mg/L 2 20 03/19/18 0.00 enb <br /> Hydroxide as CaCO3 1 U mg/L 2 20 03/19/18 0 00 enb <br /> Total Alkalinity 1 31.1 mg/L 2 20 03/19/18 0.00 enb <br /> Cation-Anion Balance Calculation <br /> Cation-Anion Balance 0.0 % 03/23/18 0:00 calc <br /> Sum of Anions 1.5 meq/L 03/23/18 0:00 calc <br /> Sum of Cations 1.5 meq/L 03/23/18 0 00 calc <br /> Chloride SM45000I-E 1 0.9 B * mg/L 0.5 2 03/19/1813.13 kea <br /> Conductivity @25C SM2510B 1 194 umhos/cm 1 10 03/19/18 18.40 enb <br /> Cyanide,total M3354-Colorimetncw/distillation 0.5 U mg/L 0.003 0.01 03/22/1823:16 pjb <br /> Fluoride SM450OF-C 1 0.21 B mg/L 0.05 0.3 03/20/18 17 41 enb <br /> Hardness as CaCO3 SM2340B-calculation 67 mg/L 0.2 5 03/23/18 0-00 calc <br /> (dissolved) <br /> Lab Filtration(0.45um sOPwc050 1 03/20/18 13:05 enb <br /> filter) <br /> Lab Filtration(0.45um) M200 7/200 8/3005A 1 03/17/18 18 00 sck <br /> &Acidification <br /> Nitrate/Nitrite as N M353 2-H2SO4 preserved 1 0.15 mg/L 0.02 0.1 03/17/18 1:02 pjb <br /> pH(lab) SM45001-1+B <br /> pH 1 7.6 H units 0.1 0.1 03/19/18 0 00 enb <br /> pH measured at 1 23.7 C 0.1 0.1 03/19/18 0:00 enb <br /> Phosphorus,ortho M365 1-Automated Ascorbic Arad 1 U mg/L 0.02 0.05 03/16/18 23-54 pjb <br /> dissolved <br /> Residue, Filterable SM2540C 1 118 mg/L 10 20 03/16/18 15 48 emk <br /> (TDS)@180C <br /> Residue, Non- SM2540D 1 16.0 B mg/L 5 20 03/17/18 7:19 ecc <br /> Filterable(TSS) <br /> @ 105C <br /> Sulfate D516-02/-07-Turbidimetric 5 38.4 * mg/L 5 25 03/16/1812-41 kea <br /> TDS(calculated) Calculation 96.4 mg/L 03/23/18 0-00 calc <br /> TDS(ratio- Calculation 1.22 03/23/18 0:00 calc <br /> measured/calculated) <br /> REPIN.02.06.05.01 "Please refer to Qualifier Reports for details. <br /> L43205-1803231004 Page 7 of 22 <br />