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e , <br /> CMC—Henderson Operations <br /> DRMS 2022 Annual Water Monitoring Report <br /> May 2023 <br /> Tabular data for WFR-20 are presented in Table 2 with accompanying Trend Evaluations 33-36. <br /> 2.2.6 Surface Water Sampling Location: WFR-40 <br /> WFR-40 is located downgradient of the Henderson Mill in the Williams Fork River.Although still <br /> within historical measurements, recent pH and sulfate fluctuations may relate to nearby hillside <br /> destabilization from the Williams Fork wildfire activity. The increased pH immediately following <br /> the 2020 wildfire is a common response from runoff interacting with a recently burned area. The <br /> pH measurements in 2022 that resemble pre=wildfire results could reflect slow revegetation and <br /> hillside stabilization.WFR-40 will continue to be monitored to determine potential influences from <br /> the recent wildfire activity. <br /> Tabular data for WFR-40 are presented in Table 2 with accompanying Trend Evaluations 37-40. <br /> 3.0 Conclusion <br /> This report summarizing annual water monitoring data collected for each POC well and non-POC <br /> long-term surface water monitoring location meets the conditions of the Henderson GWMP <br /> reporting requirements.In accordance with the GWMP,Henderson has provided a summary of 2022 <br /> water monitoring data,a comparison to NPLs(where applicable),evaluation of water quality trends, <br /> and outlier identification for each permit-required parameter for POC and non-POC surface water <br /> locations. <br /> 7of8 <br />