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Natural Soda LLC 2023 Project Status Report & Annual Plan of Development A-4 January 2024 Appx. Table A-3: MMC-IRI-5 Annual Perched Aquifer Parameters No. of Samples High Date Low Date Average Units Wet Chemistry Bicarbonate as CaCO3 63 327.00 06/30/2009 2.00 12/18/1991 183.47 mg/l Carbonate as CaCO3 63 284.00 12/18/1991 0.00 06/14/2008 75.80 mg/l Total Alkalinity as CaCO3 63 406.00 03/25/1992 181.00 05/29/2002 251.81 mg/l Bromide 33 1.00 08/22/1991 0.00 08/12/1992 0.21 mg/l Cation-Anion Balance 60 17.30 06/14/2008 -10.20 05/26/2004 0.74 % Sum of Anions 55 15.77 06/16/1992 8.43 12/19/1995 9.91 meq/l Sum of Cations 55 15.25 06/16/1992 7.90 05/26/2004 10.11 meq/l Chemical Oxygen 30 181.00 11/02/2015 0.00 05/29/2002 52.07 mg/l Chloride 63 420.00 06/16/1992 9.00 12/19/1995 20.60 mg/l Conductivity, Lab 63 1,500.00 06/16/1992 795.00 08/12/1991 974.41 µmhos Fluoride 63 0.90 09/16/1991 0.00 06/30/1995 0.29 mg/l Hardness as CaCO3 63 182.00 06/14/2008 1.00 12/20/1993 34.57 mg/l Nitrate as N, dissolved 34 12.50 05/29/2002 0.00 08/12/1992 0.97 mg/l Nitrate/Nitrite as N, 34 12.50 05/29/2002 0.00 08/12/1992 0.82 mg/l Nitrite as N, dissolved 34 0.07 02/12/2023 0.00 08/12/1992 0.02 mg/l Nitrogen, Ammonia 34 0.87 06/23/1994 0.08 05/21/2007 0.27 mg/l Nitrogen, Organic 34 80.00 05/15/1998 0.20 03/09/2020 5.10 mg/l Nitrogen, Total Kjeldahl 34 80.00 05/15/1998 0.30 03/09/2020 4.60 mg/l pH, lab 63 11.90 06/28/1993 2.40 06/16/1992 9.20 units Phosphate, total 32 155.00 07/29/2009 0.06 05/29/2002 5.47 mg/l Phosphorus, total 34 1.87 06/18/1996 0.02 05/29/2002 0.20 mg/l SAR in Water 54 90.44 01/20/1994 7.50 06/30/2009 21.87 none Sulfate 63 290.00 03/25/1992 148.00 03/22/1996 204.14 mg/l Sulfide 33 6.60 03/09/2020 0.05 06/14/2008 0.56 mg/l Total Dissolved Solids 62 1,090 06/16/1992 504 04/21/1994 629 mg/l Conductivity, Field 76 9,880 05/21/2007 715 12/19/1995 1,166 µmhos pH, Field 75 12.00 08/12/1992 6.33 06/14/2008 9.84 units Temperature (°C), Field 36 17 06/14/2008 9.70 11/01/2002 12 (°C) Water Level, Field 63 248.06 06/15/2010 237.80 11/09/2022 240.65 Ft. Parameters No. of Samples High Date Low Date Average Units Metals Aluminum, dissolved 33 10.00 08/22/1992 0.04 05/29/2003 1.01 mg/l Arsenic, dissolved 33 0.0060 06/18/1996 0.0003 05/26/2004 0.0015 mg/l Barium, dissolved 33 0.270 05/21/2007 0.013 05/26/2004 0.040 mg/l Beryllium, dissolved 33 0.005 08/22/1992 0.005 08/22/1992 0.005 mg/l Boron, dissolved 63 0.11 11/21/2005 0.02 08/22/1997 0.07 mg/l Cadmium, dissolved 33 0.0050 08/22/1992 0.0000 03/22/2016 0.0025 mg/l Calcium, dissolved 63 63.60 06/14/2008 1.00 06/16/1992 7.22 mg/l Chromium, dissolved 33 0.02 08/22/1992 0.01 06/23/1994 0.01 mg/l Copper, dissolved 33 0.04 06/25/2019 0.01 06/23/1994 0.02 mg/l Iron, dissolved 33 7.30 08/22/1992 0.01 05/26/2004 0.61 mg/l Lead, dissolved 33 0.12 03/22/2016 0.02 08/12/1991 0.05 mg/l Lithium, dissolved 33 0.06 10/03/2012 0.02 02/12/2023 0.03 mg/l Magnesium, dissolved 63 9.10 06/30/2009 0.30 06/30/1995 4.65 mg/l Manganese, dissolved 37 0.07 08/22/1992 0.01 08/22/1997 0.02 mg/l Mercury, dissolved 33 0.0001 08/22/1992 0.0001 08/22/1992 0.0001 mg/l Molybdenum, dissolved 33 0.03 06/14/2008 0.01 06/18/1996 0.02 mg/l Nickel, dissolved 33 0.04 07/29/2009 0.02 08/22/1992 0.03 mg/l Potassium, dissolved 62 22.00 12/18/1991 0.70 06/25/2019 7.14 mg/l Selenium, dissolved 33 0.001 08/12/1991 0.001 08/12/1991 0.001 mg/l Silica, dissolved 62 74.00 08/22/1992 10.90 03/21/2017 18.09 mg/l Sodium, dissolved 62 336.00 06/16/1992 166.00 05/26/2004 207.98 mg/l Strontium, dissolved 62 1.30 06/30/2009 0.06 06/16/1992 0.50 mg/l Vanadium, dissolved 33 0.010 08/22/1992 0.010 08/22/1992 0.010 mg/l Zinc, dissolved 33 0.58 03/15/2022 0.02 06/23/1994 0.07 mg/l