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AWES, LLC <br />4 <br />2.2 Groundwater Level Measurements <br />All monitoring wells were surveyed to the nearest 0.01 foot for vertical elevation and to the nearest 0.5 <br />foot for horizontal location. Groundwater level measurements in all wells have been measured by an <br />electric water level indicator on a monthly basis since August 2024. Raptor will continue to measure water <br />levels on a monthly basis during dewatering operations. After reclamation groundwater levels will be <br />measured on a quarterly basis until the mine permit has been withdrawn. <br />2.3 Chemical Analyses <br />Table 1 presents field parameters and laboratory analyses for samples obtained from one well selected as <br />a compliance monitoring well. Water levels will be measured from all wells on a monthly basis. Five <br />samples will be obtained from the compliance well on a quarterly basis will be analyzed for the parameters <br />below to establish a baseline. The compliance well will be sampled annually thereafter. <br />Table 1 – Analytical Parameters <br />Parameter Analytical Method Units Water Quality <br />Standard Frequency <br />Field Parameters <br />pH Direct <br />Measurement s.u.6.5-9 Annual <br />Specific Conductance Direct <br />Measurement uS/cm N/A Annual <br />Temperature Direct <br />Measurement <br />○F N/A Annual <br />Water Level Direct <br />Measurement Ft. N/A Quarterly <br />Laboratory Parameters <br />Arsenic EPA 200.8 ug/L 10 5 quarters/annual <br />Cadmium EPA 200.8 ug/L 5 5 quarters/annual <br />Chromium EPA 200.8 ug/L 10 5 quarters/annual <br />Copper EPA 200.8 ug/L 200 5 quarters/annual <br />Lead EPA 200.8 ug/L 50 5 quarters/annual <br />Manganese EPA 200.8 ug/L 50 5 quarters/annual <br />Mercury EPA 200.8 ug/L 2 5 quarters/annual <br />Nickel EPA 200.8 ug/L 100 5 quarters/annual <br />Selenium EPA 200.8 ug/L 50 5 quarters/annual <br />Uranium EPA 200.8 ug/L 30 5 quarters/annual <br />Zinc EPA 200.8 ug/L 2000 5 quarters/annual <br />Nitrate EPA 300 mg/L 10 5 quarters/annual <br />Sulfate EPA 300 mg/L 250 5 quarters/annual <br />Gross Alpha Particle EPA 900 pCi/L 15 5 quarters/annual <br />Total Dissolved Solids EPA 160.1 mg/L Varied 5 quarters/annual