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Natural Soda LLC 2023 Project Status Report & Annual Plan of Development A-6 January 2024 Appx. Table A-5: 89-2 Quarterly A-Groove Aquifer Parameters No. of Samples High Date Low Date Average Units Wet Chemistry Bicarbonate as CaCO3 194 903.00 12/12/2008 41.00 01/30/1997 517.28 mg/l Carbonate as CaCO3 194 566.00 01/30/1997 8.00 11/28/1990 91.18 mg/l Total Alkalinity as CaCO3 194 926.00 12/12/2008 160.00 10/25/1990 606.84 mg/l Bromide 27 3.00 06/26/1990 0.05 07/01/1997 0.44 mg/l Cation-Anion Balance 185 63.40 04/14/2005 -28.80 08/02/2006 0.46 % Sum of Anions 168 20.10 12/12/2008 11.66 11/28/1990 14.15 meq/l Sum of Cations 168 67.50 04/14/2005 7.80 08/02/2006 14.40 meq/l Chemical Oxygen Demand 24 220.00 09/22/2010 10.00 08/02/2006 80.23 mg/l Chloride 193 118.00 10/22/1989 2.00 04/24/1991 19.12 mg/l Conductivity, Lab 191 1,760.00 12/12/2008 1,000.00 05/20/1993 1,257.48 µmhos Fluoride 194 30.00 12/19/1991 1.90 06/26/1991 21.33 mg/l Hardness as CaCO3 188 375.00 05/21/2018 0.40 10/25/1990 11.70 mg/l Nitrate as N, dissolved 28 5.76 08/10/2008 0.02 07/18/1995 0.53 mg/l Nitrate/Nitrite as N, 28 6.26 08/10/2008 0.02 07/18/1995 0.56 mg/l Nitrite as N, dissolved 28 0.50 08/10/2008 0.01 03/30/1990 0.13 mg/l Nitrogen, Ammonia 26 3.77 08/10/2008 0.54 06/15/1992 1.30 mg/l Nitrogen, Organic 26 14.60 09/27/1990 0.10 06/15/1992 4.37 mg/l Nitrogen, Total Kjeldahl 26 15.40 09/27/1990 0.60 06/15/1992 5.49 mg/l pH, lab 190 9.70 12/20/1994 8.00 07/18/1995 8.92 units Phosphate, total 22 155.00 06/25/2007 0.06 07/02/1998 10.79 mg/l Phosphorus, total 27 0.46 06/26/1990 0.01 08/17/1993 0.08 mg/l SAR in Water 151 345.00 04/14/2005 0.21 05/21/2018 56.18 none Sulfate 194 445.00 06/26/1990 2.49 05/21/2018 40.76 mg/l Sulfide 23 2.40 07/24/2002 0.02 07/15/2004 0.45 mg/l Total Dissolved Solids 194 2,040.00 04/14/2005 494.00 10/25/1990 783.43 mg/l Conductivity, Field 241 1,980.00 12/12/2008 620.00 03/16/1994 1,222.41 µmhos pH, Field 241 10.00 08/22/1991 6.80 03/10/2015 9.08 units Temperature (°C), Field 121 17.40 07/01/2002 8.10 02/08/2021 12.30 (°C) Water Level, Field 107 545.20 06/25/2014 463.95 04/01/2003 497.61 Ft. Parameters No. of Samples High Date Low Date Average Units Metals Aluminum, dissolved 26 0.70 10/22/1989 0.03 07/01/1997 0.12 mg/l Arsenic, dissolved 26 0.04 06/26/1991 0.00 06/15/1992 0.01 mg/l Barium, dissolved 26 0.23 07/15/2004 0.01 08/02/2006 0.04 mg/l Beryllium, dissolved 26 0.01 06/26/1990 0.01 06/26/1990 0.01 mg/l Boron, dissolved 187 1.48 04/14/2005 0.19 08/02/2006 0.37 mg/l Cadmium, dissolved 26 0.01 06/26/1990 0.01 06/26/1990 0.01 mg/l Calcium, dissolved 186 141.00 05/21/2018 0.30 04/27/2004 2.48 mg/l Chromium, dissolved 26 0.07 07/30/2003 0.01 06/26/1990 0.04 mg/l Copper, dissolved 26 0.01 06/26/1990 0.01 06/26/1990 0.01 mg/l Iron, dissolved 26 0.80 10/22/1989 0.01 07/18/1995 0.13 mg/l Lead, dissolved 26 0.05 10/22/1989 0.02 06/26/1990 0.03 mg/l Lithium, dissolved 26 0.13 07/15/2004 0.02 06/26/1990 0.05 mg/l Magnesium, dissolved 186 9.10 12/12/2008 0.20 04/27/2004 1.28 mg/l Manganese, dissolved 25 0.14 07/30/2003 0.01 06/26/1990 0.06 mg/l Mercury, dissolved 26 0.0006 06/15/1992 0.0001 06/26/1990 0.0004 mg/l Molybdenum, dissolved 26 0.13 10/22/1989 0.01 07/12/1996 0.05 mg/l Nickel, dissolved 26 0.52 07/30/2003 0.02 10/22/1989 0.19 mg/l Potassium, dissolved 187 12.50 05/21/2018 0.50 06/10/2020 1.34 mg/l Selenium, dissolved 26 0.009 09/27/1990 0.001 06/26/1990 0.004 mg/l Silica, dissolved 187 27.70 01/09/2001 2.00 12/10/2019 12.52 mg/l Sodium, dissolved 187 1,530.00 04/14/2005 9.20 05/21/2018 321.05 mg/l Strontium, dissolved 187 1.34 12/12/2008 0.03 04/27/2004 0.20 mg/l Vanadium, dissolved 26 0.01 06/26/1990 0.01 06/26/1990 0.01 mg/l Zinc, dissolved 26 0.03 07/29/2009 0.01 06/26/1990 0.02 mg/l