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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: BG-4 <br />Inorganic Prep <br />Lab Filtration (0.45um) EPA 200.7/200.8/3005A Filter <br />& Acidification <br />Metals Analysis <br />ACZ Sample ID: <br />Date Sampled: <br />Date Received: <br />Sample Matrix: <br />L 94894-02 <br />05119125 13:59 <br />05/23/25 <br />Groundwater <br />06/02/2516:00 msp <br />ilarsiave <br />'lleth r.mution <br />KesultttQ. <br />:eQ <br />Boron, dissolved <br />EPA 200.7 <br />1 <br />0.785 <br />mg/L <br />0.03 <br />0.1 <br />06/06/25 12:19 <br />Wtc <br />Calcium, dissolved <br />EPA 200.7 <br />1 <br />4.19 <br />mg/L <br />0.1 <br />0.5 <br />06/06/25 12:19 <br />Wtc <br />Magnesium, dissolved <br />EPA 200.7 <br />1 <br />3.03 <br />mg/L <br />0.2 <br />1 <br />06/06/25 12:19 <br />Wtc <br />Potassium, dissolved <br />EPA 200.7 <br />1 <br />1.41 <br />mg/L <br />0.5 <br />1 <br />06/06/25 12:19 <br />Wtc <br />Silica, dissolved <br />EPA 200.7 <br />1 <br />15.1 <br />mg/L <br />0.2 <br />1 <br />06/06/25 12:19 <br />Wtc <br />Sodium, dissolved <br />EPA 200.7 <br />1 <br />465 <br />* mg/L <br />0.2 <br />1 <br />06/06/25 12:19 <br />Wtc <br />Strontium, dissolved <br />EPA 200.7 <br />1 <br />1.000 <br />* mg/L <br />0.009 <br />0.045 <br />06/06/25 12:19 <br />Wtc <br />Wet Chemistry <br />MethodParameter EPA Dilution <br />Result <br />a <br />•e <br />�. - <br />Alkalinity as CaCO3 <br />SM 2320 B-2011 <br />Bicarbonate as <br />1 <br />774 <br />mg/L <br />2 <br />20 <br />05/27/25 0:00 <br />cjk <br />CaCO3 <br />Carbonate as CaCO3 <br />1 <br />61.3 <br />* mg/L <br />2 <br />20 <br />05/27/25 0:00 <br />cjk <br />Hydroxide as CaCO3 <br />1 <br /><2 <br />U mg/L <br />2 <br />20 <br />05/27/25 0:00 <br />cjk <br />Total Alkalinity <br />1 <br />836 <br />mg/L <br />2 <br />20 <br />05/27/25 0:00 <br />cjk <br />Cation -Anion Balance <br />Calculation <br />Cation -Anion Balance <br />0.0 <br />% <br />06/16/25 0:00 <br />calc <br />Sum of Anions <br />21 <br />meq/L <br />06/16/25 0:00 <br />calc <br />Sum of Cations <br />21.0 <br />meq/L <br />06/16/25 0:00 <br />calc <br />Chloride <br />EPA 300.0 <br />10 <br />104 <br />mg/L <br />4 <br />20 <br />06/04/25 23:59 <br />mad <br />Conductivity @25C <br />SM 2510 B-2011 <br />1 <br />1900 <br />* umhos/cm <br />1 <br />10 <br />05/27/25 13:51 <br />cjk <br />Fluoride <br />EPA 300.0 <br />10 <br />21.9 <br />* mg/L <br />0.5 <br />2.5 <br />06/04/25 23:59 <br />mad <br />Hardness as CaCO3 <br />Calculation (SM 2340 B-2011) <br />23 <br />mg/L <br />0.2 <br />5 <br />06/16/25 0:00 <br />calc <br />(dissolved) <br />Lab Filtration (0.45um <br />SOPWC050 <br />1 <br />05/28/25 11:38 <br />cjk <br />filter) <br />pH (lab) <br />SM 4500-H+ B-2011 <br />pH <br />1 <br />8.6 <br />H units <br />0.1 <br />0.1 <br />05/27/25 0:00 <br />cjk <br />pH measured at <br />1 <br />22.3 <br />* C <br />0.1 <br />0.1 <br />05/27/25 0:00 <br />cjk <br />Residue, Filterable <br />SM 2540 C-2011 <br />2 <br />1070 <br />* mg/L <br />40 <br />80 <br />05/24/25 10:50 <br />cob <br />(TDS) @180C <br />Sodium Adsorption <br />USGS-11738-78 <br />43 <br />06/16/25 0:00 <br />calc <br />Ratio in Water <br />Sulfate <br />EPA 300.0 <br />10 <br /><9 <br />U * mg/L <br />9 <br />20 <br />06/04/25 23:59 <br />mad <br />TDS (calculated) <br />Calculation <br />1130 <br />mg/L <br />06/16/25 0:00 <br />calc <br />TDS (ratio - <br />Calculation <br />0.95 <br />06/16/25 0:00 <br />talc <br />measured/calculated) <br />Natural Soda LLC <br />Daub & Associates, Inc. Page 58 of 88 2025 2nd Quarter EPA Report <br />