2023-05-25_PERMIT FILE - M2022048 (7)

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Appendix I Tables Water Quality Parameter Lists INDICATOR PARAMETERS Table 3: INDICATOR PARAMETERS RATIONAL The parameters in Table 2 are common for comparison of changes to groundwater chemistry, and not a reflection of pollution, unless a source is identified.The parameters provide information about anion- cation balance and the salts, solids,and nitrogen that is in the groundwater. Baseline data of the parameters will help understand groundwater chemistry. The metals are listed in Table 1 Human Health Standards or Table 2 Domestic Water Supply Drinking Water Standards in Reg 41—Colorado Basic Groundwater Standards. Parameters can be left out of regular groundwater monitoring depending on the data collected. The parameters to be removed from regular monitoring are those with significant number of non-detectable concentrations (80%or greater) or are determined to be unreliable based upon other factors. Other factors include, but are not limited to, nitrates from fertilizers used by farmers on land in the area and total suspended and total dissolved solids from wells that have high turbidity. Table 3—Anions/Cations and Indicators Parameter Frequency Five Quarters of Baseline; Alkalinity(BiCarb/Garb) annually unless omitted for non-detects or other factors Five Quarters of Baseline; Calcium annually unless omitted for non-detects or other factors Chloride Five Quarters of Baseline; annually unless omitted for non-detects or other factors Fluoride Quarterly Five Quarters of Baseline; annually unless omitted for non-detects or other factors Five Quarters of Baseline; Magnesium annually unless omitted for non-detects or other factors Five Quarters of Baseline; Nitrite annually unless omitted for non-detects or other factors Five Quarters of Baseline; Nitrate annually unless omitted for non-detects or other factors H Five Quarters of Baseline; p annually unless omitted for non-detects or other factors Five Quarters of Baseline; Potassium annually unless omitted for non-detects or other factors Five Quarters of Baseline; Sodium annually unless omitted for non-detects or other factors Specific Conductance Five Quarters of Baseline; annually unless omitted for non-detects or other factors Sulfate Five Quarters of Baseline; annually unless omitted for non-detects or other factors Total Dissolved Solids (TDS) Five Quarters of Baseline; annually unless omitted for non-detects or other factors Total Suspended Solids (TSS) Five Quarters of Baseline; annually unless omitted for non-detects or other factors MOLEN LG Everist Sampling Plan List of Parameters &ASSOCIATES Page 2 of 3