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ACZ Laboratories, Inc. <br />2773 Downhill Drive Steamboat Springs, CO 80487 (800) 334-5493 <br />Natural Soda, LLC <br />Project ID: <br />Sample ID: WSW-3 <br />Wet Chemistry <br />ACZ Sample ID: <br />Date Sampled: <br />Date Received: <br />Sample Matrix: <br />L94529-02 <br />05105125 12:56 <br />05108125 <br />Groundwater <br />Parameter <br />av Method Dilution <br />: suit <br />QualA:«=Irns <br />1111L <br />UL <br />.. <br />Alkalinity as CaCO3 <br />SM 2320 B-2011 <br />Bicarbonate as <br />1 <br />731 <br />mg/L <br />2 <br />20 <br />05/16/25 0:00 <br />rsc <br />CaCO3 <br />Carbonate as CaCO3 <br />1 <br />117 <br />mg/L <br />2 <br />20 <br />05/16/25 0:00 <br />rsc <br />Hydroxide as CaCO3 <br />1 <br /><2 <br />U <br />mg/L <br />2 <br />20 <br />05/16/25 0:00 <br />rsc <br />Total Alkalinity <br />1 <br />849 <br />mg/L <br />2 <br />20 <br />05/16/25 0:00 <br />rsc <br />Bromide <br />EPA 300.0 <br />10 <br /><0.5 <br />U <br />mg/L <br />0.5 <br />2.5 <br />05/21 /25 20:18 <br />ems <br />Cation -Anion Balance <br />Calculation <br />Cation -Anion Balance <br />-2.0 <br />% <br />05/27/25 0:00 <br />calc <br />Sum of Anions <br />25 <br />meq/L <br />05/27/25 0:00 <br />calc <br />Sum of Cations <br />24 <br />meq/L <br />05/27/25 0:00 <br />calc <br />Chemical Oxygen <br />EPA 410.4 <br />1 <br />32 <br />mg/L <br />10 <br />20 <br />05/20/25 10:03 <br />asn <br />Demand <br />Chloride <br />EPA 300.0 <br />10 <br />222 <br />mg/L <br />4 <br />20 <br />05/21 /25 20:18 <br />ems <br />Conductivity @25C <br />SM 2510 B-2011 <br />1 <br />2250 <br />umhos/cm <br />1 <br />10 <br />05/16/25 5:37 <br />rsc <br />Fluoride <br />EPA 300.0 <br />10 <br />16.3 <br />mg/L <br />0.5 <br />2.5 <br />05/21 /25 20:18 <br />ems <br />Hardness as CaCO3 <br />Calculation (SM 2340 B-2011) <br />31 <br />mg/L <br />0.2 <br />5 <br />05/27/25 0:00 <br />calc <br />(dissolved) <br />Lab Filtration (0.45um <br />SOPWC050 <br />1 <br />05/15/25 11:06 <br />cm <br />filter) <br />Nitrate as N <br />Calculation (1\1031\102-NO2) <br /><0.02 <br />UH <br />mg/L <br />0.02 <br />0.1 <br />05/27/25 0:00 <br />calc <br />Nitrate/Nitrite as N <br />EPA 353.2 <br />1 <br /><0.02 <br />UH <br />mg/L <br />0.02 <br />0.1 <br />05/10/25 1:17 <br />pjb <br />Nitrite as N <br />EPA 353.2 <br />1 <br /><0.01 <br />UH <br />* mg/L <br />0.01 <br />0.05 <br />05/10/25 1:17 <br />pjb <br />Nitrogen, ammonia <br />EPA 350.1 <br />1 <br />0.863 <br />mg/L <br />0.1 <br />0.2 <br />05/20/25 15:45 <br />gfm <br />Nitrogen, organic <br />Calculation (TKN-NH3) <br />0.217 <br />B <br />mg/L <br />0.2 <br />0.5 <br />05/27/25 0:00 <br />calc <br />Nitrogen, total Kjeldahl <br />EPA 351.2 <br />1 <br />1.08 <br />mg/L <br />0.2 <br />0.5 <br />05/22/25 3:11 <br />pjb <br />pH (lab) <br />SM 4500-H+ B-2011 <br />pH <br />1 <br />8.8 <br />H <br />units <br />0.1 <br />0.1 <br />05/16/25 0:00 <br />rsc <br />pH measured at <br />1 <br />20.4 <br />C <br />0.1 <br />0.1 <br />05/16/25 0:00 <br />rsc <br />Phosphate, total <br />Calculation (total Phosphorus) <br />0.09 <br />B <br />mg/L <br />0.03 <br />0.2 <br />05/27/25 0:00 <br />calc <br />Phosphorus, total <br />EPA 365.1 <br />1 <br />0.030 <br />B <br />mg/L <br />0.01 <br />0.05 <br />05/15/25 11:23 <br />ptW <br />Residue, Filterable <br />SM 2540 C-2011 <br />1 <br />1330 <br />* mg/L <br />20 <br />40 <br />05/10/25 11:37 <br />cob <br />(TDS) @180C <br />Sodium Adsorption <br />USGS - 11738-78 <br />42 <br />05/27/25 0:00 <br />calc <br />Ratio in Water <br />Sulfate <br />EPA 300.0 <br />10 <br />33.6 <br />mg/L <br />9 <br />20 <br />05/21 /25 20:18 <br />ems <br />Sulfide as S <br />SM 4500-S2 D-2011 <br />15 <br />5.28 <br />mg/L <br />0.3 <br />1.5 <br />05/09/25 13:11 <br />trt <br />TDS (calculated) <br />Calculation <br />1350 <br />mg/L <br />05/27/25 0:00 <br />calc <br />TDS (ratio - <br />Calculation <br />0.99 <br />05/27/25 0:00 <br />talc <br />measured/calculated) <br />Natural Soda LLC <br />Daub & Associates, Inc. Page 74 of 88 2025 2nd Quarter EPA Report <br />