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Natural Soda LLC 2023 Project Status Report & Annual Plan of Development A-3 January 2024 Appx. Table A-2: MMC-IRI-1 Annual Perched Aquifer Parameters No. of Samples High Date Low Date Average Units Wet Chemistry Bicarbonate as CaCO3 125 548.00 01/08/2015 0.0000 08/01/1990 161.14 mg/l Carbonate as CaCO3 125 300.00 10/25/1990 0.0000 08/30/2008 116.79 mg/l Total Alkalinity as CaCO3 125 900.00 08/01/1990 96.40 08/10/2021 292.88 mg/l Bromide 28 1.60 07/21/1993 0.06 06/16/2011 0.29 mg/l Cation-Anion Balance 122 63.90 08/14/2017 -16.00 03/13/2003 0.66 % Sum of Anions 115 24.97 08/13/1990 5.00 08/10/2021 8.83 meq/l Sum of Cations 115 50.00 08/14/2017 5.70 06/14/2011 9.28 meq/l Chemical Oxygen 21 300.00 09/21/2010 10.00 08/16/1994 44.18 mg/l Chloride 125 400.00 04/24/1991 14.00 12/15/1992 53.43 mg/l Conductivity, Lab 122 2,630.00 01/20/1992 347.00 08/10/2021 862.52 µmhos Fluoride 125 24.00 09/02/1998 1.70 04/20/1992 6.41 mg/l Hardness as CaCO3 125 553.00 08/01/1990 2.00 06/23/2010 36.02 mg/l Nitrate as N, dissolved 28 2.77 06/26/2002 0.02 06/28/2006 0.35 mg/l Nitrate/Nitrite as N, 28 2.79 06/26/2002 0.02 09/07/2022 0.32 mg/l Nitrite as N, dissolved 28 0.13 08/16/1996 0.01 08/01/1990 0.05 mg/l Nitrogen, Ammonia 27 2.57 07/31/1991 0.25 06/09/1999 0.73 mg/l Nitrogen, Organic 27 3.90 07/21/1992 0.10 06/16/2011 1.00 mg/l Nitrogen, Total Kjeldahl 27 5.90 07/31/1991 0.33 09/07/2022 1.73 mg/l pH, lab 122 11.30 07/31/1991 6.60 08/30/2008 9.56 units Phosphate, total 26 155.00 06/28/2006 0.03 09/07/2022 16.82 mg/l Phosphorus, total 27 1.41 09/21/2010 0.01 09/07/2022 0.24 mg/l SAR in Water 117 76.00 08/14/2017 5.76 08/01/1990 21.12 none Sulfate 125 243.00 12/15/1992 39.20 08/07/2023 75.14 mg/l Sulfide 26 4.00 06/13/2001 0.03 06/02/1998 1.08 mg/l Total Dissolved Solids 123 1,644.00 08/01/1990 328.00 08/10/2021 579.21 mg/l Conductivity, Field 183 3,500.00 08/01/1990 573.00 08/10/2021 1,140.47 µmhos pH, Field 183 12.80 12/01/1990 6.04 08/30/2008 10.20 units Temperature (°C), Field 123 20.90 08/07/2023 6.50 12/12/2008 12.36 (°C) Water Level, Field 103 387.19 08/14/2017 308.80 06/20/2017 380.42 Ft. Parameters No. of Samples High Date Low Date Average Units Metals Aluminum, dissolved 28 11.10 08/16/1996 0.06 07/29/2009 3.18 mg/l Arsenic, dissolved 28 0.0060 07/31/1991 0.0005 11/27/2012 0.0024 mg/l Barium, dissolved 28 0.29 08/14/1995 0.01 11/27/2012 0.07 mg/l Beryllium, dissolved 28 0.012 08/07/2023 0.003 08/14/1995 0.008 mg/l Boron, dissolved 125 0.39 01/08/2015 0.00 10/25/1990 0.17 mg/l Cadmium, dissolved 28 0.03 07/21/1993 0.03 07/21/1993 0.03 mg/l Calcium, dissolved 125 223.00 08/01/1990 0.90 06/23/2010 10.76 mg/l Chromium, dissolved 28 0.02 08/01/1990 0.01 08/16/1996 0.01 mg/l Copper, dissolved 28 0.20 06/14/2000 0.01 08/01/1990 0.04 mg/l Iron, dissolved 28 14.10 07/21/1993 0.02 07/21/1992 3.09 mg/l Lead, dissolved 28 0.10 07/21/1993 0.05 06/16/1997 0.07 mg/l Lithium, dissolved 28 0.19 08/13/1990 0.00 08/30/2008 0.05 mg/l Magnesium, dissolved 125 31.20 03/14/2000 0.30 09/26/2001 2.58 mg/l Manganese, dissolved 28 0.37 08/14/1995 0.01 08/30/2008 0.08 mg/l Mercury, dissolved 28 0.0002 08/14/1995 0.0002 08/14/1995 0.0002 mg/l Molybdenum, dissolved 28 0.10 08/01/1990 0.01 06/16/1997 0.04 mg/l Nickel, dissolved 28 0.02 10/25/1990 0.01 08/16/1996 0.01 mg/l Potassium, dissolved 125 146.00 08/01/1990 1.00 04/24/1991 7.44 mg/l Selenium, dissolved 28 0.0040 07/31/1991 0.0001 08/07/2023 0.0023 mg/l Silica, dissolved 125 99.30 08/14/1995 6.60 08/07/2023 28.78 mg/l Sodium, dissolved 125 1,110.00 08/14/2017 124.00 05/18/2021 195.48 mg/l Strontium, dissolved 125 2.45 08/01/1990 0.02 05/24/1994 0.30 mg/l Vanadium, dissolved 28 0.03 08/14/1995 0.01 06/16/1997 0.01 mg/l Zinc, dissolved 28 0.30 08/07/2023 0.02 06/09/1999 0.08 mg/l