2025-08-28_HYDROLOGY - M1983194 (6)

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Natural Soda LLC Quarterly Water Quality Data Tables 3rd Qtr 4th Qtr 1st Qtr High Low Avg 2023 2023 2024 Field Readings Sample Date Field MNL Depth to Water (ft bgs)500.7 432.4 473.2 471.8 473.3 468.0 pH (SI)10.1 7.1 9.0 8.5 8.6 8.6 Temperature (°C)19.0 7.6 12.5 16.0 11.3 11.1 Conductivity (μmhos/cm)1,683 925 1,343 1,312 1,377 1,343 Lab Reference Number L82540-02 L84767-01 L86271-04 Sample Date 08/14/23 11/21/23 02/27/24 Major Analytes Boron (mg/L)3.3 0.4 0.7 0.7 0.7 0.7 Calcium (mg/L)13.0 0.5 2.3 2.6 2.6 2.6 Magnesium (mg/L)8.0 0.3 1.4 1.7 1.7 1.7 Potassium (mg/L)13.0 0.6 1.3 0.8 0.9 0.8 Silica (mg/L)35.9 1.8 16.8 14.3 14.4 13.7 Sodium (mg/L)408 102 348 320 335 334 Strontium (mg/L)0.8 0.1 0.5 0.7 0.7 0.7 Bicarb (HCO3 as CaCO3)762 144 612 611 704 639 Carbonate (mg/L)406 25 100 100 35 84 Alkalinity (Total as CaCO3)830 200 712 711 739 722 Chloride (mg/L)70.5 U 15.1 11.3 10.8 11.6 Conductivity Lab (µmhos/cm)1,850 1,000 1,391 1,410 1,370 1,300 Fluoride (mg/L)38.2 0.2 23.7 20.1 22.3 20.1 Hardness as CaCO3 (mg/L)65.0 0.0 11.2 14.0 13.0 13.0 pH Lab (SI)9.8 8.1 8.9 8.6 8.5 8.6 Sulfate (mg/L)140.0 U 20.1 U U U TDS (mg/L) 1,100 446 862 808 843 829 Water Level Target Range (ft.) 3rd Qtr 4th Qtr 1st Qtr High Low Avg 2023 2023 2024 Field Readings Sample Date Field MNL Depth to Water (ft bgs)545.2 464.0 497.7 518.0 517.7 511.2 pH (SI)10.0 6.8 9.1 8.9 9.0 9.0 Temperature (°C)17.4 8.1 12.3 14.8 11.7 10.9 Conductivity (μmhos/cm)1,980 620 1,222 1,181 1,213 1,240 Lab Reference Number L82540-01 N/S L86197-04 Sample Date 08/14/23 N/S 02/20/24 Major Analytes N/S Boron (mg/L)1.5 0.2 0.4 0.4 N/S 0.3 Calcium (mg/L)141.0 0.3 2.5 28.5 N/S 4.7 Magnesium (mg/L)9.1 0.2 1.3 5.7 N/S 1.9 Potassium (mg/L)12.5 0.5 1.3 2.4 N/S 1.1 Silica (mg/L)27.7 2.0 12.5 9.3 N/S 8.8 Sodium (mg/L)1,530 9 321 297 N/S 292 Strontium (mg/L)1.3 0.0 0.2 0.6 N/S 0.2 Bicarb (HCO3 as CaCO3)903 41 519 498 N/S 774 Carbonate (mg/L)566 8 91 124 N/S 68 Alkalinity (Total as CaCO3)926 160 608 622 N/S 842 Chloride (mg/L)118.0 U 19.1 12.5 N/S 11.4 Conductivity Lab (µmhos/cm)1,760 1,000 1,257 1,250 N/S 1,180 Fluoride (mg/L)30.0 1.9 21.3 16.5 N/S 16.2 Hardness as CaCO3 (mg/L)375.0 U 11.8 95.0 N/S 20.0 pH Lab (SI)9.7 8.0 8.9 8.9 N/S 8.8 Sulfate (mg/L)445.0 U 40.8 U N/S U TDS (mg/L) 2,040 494 784 753 N/S 851 Water Level Target Range (ft.)486.00 -- 506.00 89-1 Quarterly B-Groove Historical #'s Historical #'s89-2 Quarterly A-Groove 463.00 -- 483.00 08/14/23 08/14/23 11/21/23 11/21/23 02/27/24 02/20/24 Daub & Associates, Inc. Page 75 of 81 Natural Soda LLC 2024 1st Quarter EPA Report