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ACZ Laboratories, Inc. <br />2773 Downhill Drive Steamboat Sarinas. CO 80487 t800) 334-5493 <br />Natural Soda, LLC <br />Project ID: <br />Sample ID: AG-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 />Date Sampled: <br />Date Received: <br />Sample Matrix: <br />L95629-04 <br />06124125 14:11 <br />06/27/25 <br />Groundwater <br />07/07/2510:45 qcs <br />Boron, dissolved <br />EPA 200.7 <br />1 <br />0.754 <br />mg/L <br />0.03 <br />0.1 <br />07/09/25 18:46 <br />msp <br />Calcium, dissolved <br />EPA 200.7 <br />1 <br />2.62 <br />mg/L <br />0.1 <br />0.5 <br />07/09/25 18:46 <br />msp <br />Magnesium, dissolved <br />EPA 200.7 <br />1 <br />14.2 <br />mg/L <br />0.2 <br />1 <br />07/09/25 18:46 <br />msp <br />Potassium, dissolved <br />EPA 200.7 <br />1 <br />1.40 <br />mg/L <br />0.5 <br />1 <br />07/09/25 18:46 <br />msp <br />Silica, dissolved <br />EPA 200.7 <br />1 <br />11.5 <br />mg/L <br />0.2 <br />1 <br />07/09/25 18:46 <br />msp <br />Sodium, dissolved <br />EPA 200.7 <br />1 <br />792 <br />mg/L <br />0.2 <br />1 <br />07/09/25 18:46 <br />msp <br />Strontium, dissolved <br />EPA 200.7 <br />1 <br />1.63 <br />mg/L <br />0.009 <br />0.045 <br />07/09/25 18:46 <br />msp <br />Wet Chemistry <br />MethodEPA Dilution <br />Result <br />Qual XQ Units <br />MDL <br />-e <br />�. <br />Alkalinity as CaCO3 <br />SM 2320 B-2011 <br />Bicarbonate as <br />1 <br />1330 <br />mg/L <br />2 <br />20 <br />07/03/25 0:00 <br />jck <br />CaCO3 <br />Carbonate as CaCO3 <br />1 <br />201 <br />mg/L <br />2 <br />20 <br />07/03/25 0:00 <br />jck <br />Hydroxide as CaCO3 <br />1 <br /><2 <br />U mg/L <br />2 <br />20 <br />07/03/25 0:00 <br />jck <br />Total Alkalinity <br />1 <br />1530 <br />mg/L <br />2 <br />20 <br />07/03/25 0:00 <br />jck <br />Cation -Anion Balance <br />Calculation <br />Cation -Anion Balance <br />-5.3 <br />% <br />07/16/25 0:00 <br />calc <br />Sum of Anions <br />40 <br />meq/L <br />07/16/25 0:00 <br />calc <br />Sum of Cations <br />36 <br />meq/L <br />07/16/25 0:00 <br />calc <br />Chloride <br />EPA 300.0 <br />10 <br />309 <br />mg/L <br />4 <br />20 <br />07/09/25 16:57 <br />bls <br />Conductivity @25C <br />SM 2510 B-2011 <br />1 <br />3580 <br />umhos/cm <br />1 <br />10 <br />07/03/25 4:19 <br />jck <br />Fluoride <br />EPA 300.0 <br />10 <br />14.4 <br />mg/L <br />0.5 <br />2.5 <br />07/09/25 16:57 <br />bls <br />Hardness as CaCO3 <br />Calculation (SM 2340 B-2011) <br />65.0 <br />mg/L <br />0.2 <br />5 <br />07/16/25 0:00 <br />calc <br />(dissolved) <br />Lab Filtration (0.45um <br />SOPWC05o <br />1 <br />07/08/25 16:10 <br />rap <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 />06/30/25 0:00 <br />asn <br />pH measured at <br />1 <br />19.0 <br />C <br />0.1 <br />0.1 <br />06/30/25 0:00 <br />asn <br />Residue, Filterable <br />SM 2540 C-2011 <br />1 <br />734 <br />mg/L <br />20 <br />40 <br />06/30/25 18:59 <br />asn <br />(TDS) @180C <br />Sodium Adsorption <br />USGS-11738-78 <br />43 <br />07/16/25 0:00 <br />calc <br />Ratio in Water <br />Sulfate <br />EPA 300.0 <br />10 <br />11.9 <br />B mg/L <br />9 <br />20 <br />07/09/25 16:57 <br />bls <br />TDS (calculated) <br />Calculation <br />2090 <br />mg/L <br />07/16/25 0:00 <br />calc <br />TDS (ratio - <br />Calculation <br />0.35 <br />07/16/25 0:00 <br />talc <br />measured/calculated) <br />Natural Soda LLC <br />Daub & Associates, Inc. Page 68 of 88 2025 2nd Quarter EPA Report <br />