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Ellison Decline Sampling <br /> Analyte Table Value Baseline Baseline Baseline Baseline Baseline Average Value <br /> Standard Value Value Value Value Value Value Range <br /> (mg/L, unless Sampled Sampled Sampled Sampled Sampled <br /> other units 7/19/2022 10/12/2022 3/27/2023 6/15/2023 7/21/2023 <br /> given) <br /> pH Field(pH unit) 6.50-8.50 8.4 7.58 8.43 8.69 8.28 7.58-8.69 <br /> TDS 400, or 1.25 <br /> background 4450 4266 3984 5328 4507 3984-5328 <br /> Arsenic-Dissolved 0.01 0.0029- <br /> 0.0034 0.0029 0.00312 0.00303 0.00412 0.00331 0.00412 <br /> Barium-Dissolved 2 0.05 0.05 0.05 0.05 0.062 0.052 0.05-0.062 <br /> Cadmium-Dissolved 0.005 0.002- <br /> 0.002 0.002 0.002 0.002 0.0031 0.0022 0.0031 <br /> Chromium-Dissolved 0.1 0.01 0.01 0.01 0.01 0.01 0.01 0.01 <br /> Lead-Dissolved 0.05 0.005- <br /> 0.005 0.005 0.005 0.005 0.00523 0.00505 0.00523 <br /> Mercury-Dissolved 0.002 0.00025 0.00025 0.00025 0.00025 0.00025 0.00025 0.00025 <br /> Selenium-Dissolved 0.02 0.0031- <br /> 0.0042 0.0031 0.00341 0.00327 0.00433 0.00366 0.00433 <br /> Silver-Dissolved 0.05 0.004 0.004 0.004 0.004 0.004 0.004 0.004 <br /> Uranium-Dissolved 0.0168-0.03 0.00254- <br /> 0.0041 0.0026 0.00268 0.00254 0.00461 0.00331 0.00461 <br /> Vanadium-Dissolved 0.1 0.00198- <br /> 0.002 0.002 0.00204 0.00198 0.002 0.00200 0.00204 <br /> Total Alkalinity 3.9 3.9 5.62 5.16 46.17 12.95 3.9-46.17 <br /> Salinity (umhos/cm) 3960 4688 4380 6720 4937 3960-6720 <br /> Calcium 4.46 7.12 7.06 14.6 8.31 4.46-14.6 <br /> Magnesium 29.27 27.6 27.1 37.4 30.34 27.1-37.4 <br /> Sodium 3068.7 3054 2996 3378 3124.2 2996-3378 <br /> Potassium 1 31.52 32.5 32 40.5 34.13 31.52-40.5 <br /> Slick Rock Project Groundwater Sampling and Analysis Plan-2025 <br /> Slick Rock NO[Modification July 2025 <br /> Appendix C Page 10 of 35 <br />