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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: 89-1 <br />Inorganic Prep <br />Lab Filtration (0.45um) EPA200.7/200.8/3005A Filter <br />& Acidification <br />Metals Analysis <br />ACZ Sample ID: <br />L95319-04 <br />Date Sampled: <br />06110125 11:44 <br />Date Received: <br />06/12/25 <br />Sample Matrix: <br />Groundwater <br />06/24/2514:00 aeh <br />Boron, dissolved <br />EPA 200.7 <br />1 <br />0.669 <br />mg/L <br />0.03 <br />0.1 <br />06/26/25 23:47 <br />msp <br />Calcium, dissolved <br />EPA 200.7 <br />1 <br />2.63 <br />mg/L <br />0.1 <br />0.5 <br />06/26/25 23:47 <br />msp <br />Magnesium, dissolved <br />EPA 200.7 <br />1 <br />1.60 <br />mg/L <br />0.2 <br />1 <br />06/26/25 23:47 <br />msp <br />Potassium, dissolved <br />EPA 200.7 <br />1 <br />0.84 <br />B <br />mg/L <br />0.5 <br />1 <br />06/26/25 23:47 <br />msp <br />Silica, dissolved <br />EPA 200.7 <br />1 <br />14.7 <br />mg/L <br />0.2 <br />1 <br />06/26/25 23:47 <br />msp <br />Sodium, dissolved <br />EPA 200.7 <br />1 <br />337 <br />mg/L <br />0.2 <br />1 <br />06/26/25 23:47 <br />msp <br />Strontium, dissolved <br />EPA 200.7 <br />1 <br />0.676 <br />mg/L <br />0.009 <br />0.045 <br />06/26/25 23:47 <br />msp <br />Wet Chemistry <br />MethodEPA Dilution <br />Result <br />Qual <br />XQ Units <br />MDL <br />-e <br />�. <br />Alkalinity as CaCO3 <br />SM 2320 B-2011 <br />Bicarbonate as <br />1 <br />568 <br />mg/L <br />2 <br />20 <br />06/19/25 0:00 <br />asn cjk <br />CaCO3 <br />Carbonate as CaCO3 <br />1 <br />151 <br />mg/L <br />2 <br />20 <br />06/19/25 0:00 <br />asn cjk <br />Hydroxide as CaCO3 <br />1 <br /><2 <br />U <br />mg/L <br />2 <br />20 <br />06/19/25 0:00 <br />asn cjk <br />Total Alkalinity <br />1 <br />720 <br />mg/L <br />2 <br />20 <br />06/19/25 0:00 <br />asn cjk <br />Cation -Anion Balance <br />Calculation <br />Cation -Anion Balance <br />-3.2 <br />% <br />07/07/25 0:00 <br />calc <br />Sum of Anions <br />16 <br />meq/L <br />07/07/25 0:00 <br />calc <br />Sum of Cations <br />15 <br />meq/L <br />07/07/25 0:00 <br />calc <br />Chloride <br />EPA 300.0 <br />10 <br />12.3 <br />B <br />mg/L <br />4 <br />20 <br />06/17/25 1:24 <br />bls <br />Conductivity @25C <br />SM 2510 B-2011 <br />1 <br />1420 <br />umhos/cm <br />1 <br />10 <br />06/19/25 13:04 <br />asn cjk <br />Fluoride <br />EPA 300.0 <br />10 <br />22.7 <br />mg/L <br />0.5 <br />2.5 <br />06/17/25 1:24 <br />bls <br />Hardness as CaCO3 <br />Calculation (SM 2340 B-2011) <br />13 <br />mg/L <br />0.2 <br />5 <br />07/07/25 0:00 <br />calc <br />(dissolved) <br />Lab Filtration (0.45um <br />SOPWCo5o <br />1 <br />06/23/25 12:26 <br />rap <br />filter) <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 />06/19/25 0:00 <br />asn cjk <br />pH measured at <br />1 <br />21.5 <br />C <br />0.1 <br />0.1 <br />06/19/25 0:00 <br />asn cjk <br />Residue, Filterable <br />SM 2540 C-2011 <br />2 <br />764 <br />mg/L <br />40 <br />80 <br />06/16/25 10:49 <br />cob <br />(TDS) @180C <br />Sodium Adsorption <br />USGS-11738-78 <br />41 <br />07/07/25 0:00 <br />calc <br />Ratio in Water <br />Sulfate <br />EPA 300.0 <br />10 <br /><9 <br />U <br />mg/L <br />9 <br />20 <br />06/17/25 1:24 <br />bls <br />TDS (calculated) <br />Calculation <br />833 <br />mg/L <br />07/07/25 0:00 <br />calc <br />TDS (ratio - <br />Calculation <br />0.92 <br />07/07/25 0:00 <br />talc <br />measured/calculated) <br />Natural Soda LLC <br />Daub & Associates, Inc. Page 64 of 88 2025 2nd Quarter EPA Report <br />