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the data, and a comparison of the observed data to the predictions and groundwater quality <br /> standards. <br /> 3.1.Groundwater Points of Compliance <br /> Upon Points of Compliance (POCs) being assigned by DRMS, those locations will be identified <br /> here. <br /> 3.2.Groundwater Quality Standards <br /> Please see the table in Section 1.2.3. <br /> 4. Sampling Methods <br /> Consistent sampling methodology will be used to produce representative and comparable <br /> samples. Field parameters and water depths will be collected on a monthly basis, and samples <br /> will be collected on a quarterly basis to be observed for analytes. <br /> Equipment <br /> Instruments for measuring field parameters (pH, conductivity)will be calibrated according to <br /> manufacturer specifications prior to use,which will be documented in the front of the field <br /> parameter journal.A water level meter will be used prior to purging the wells and will be <br /> decontaminated with clean washing detergent between wells. Field parameters and water levels <br /> will be measured prior to sampling and recorded in the data sheets attached in Appendix A. <br /> Surface Water Sampling Procedure <br /> When sampling surface water bodies, a consistent location which provides for adequate mixing <br /> of the water body and mitigation of stagnant water and thermal layers is preferable. For example, <br /> bays and stagnant pools make poor locations for representative sampling. Meanwhile, shorelines <br /> which extend into the water make for more representative surface water sampling locations. <br /> When sampling from the shoreline of a surface water body the sample must be taken as far away <br /> from the turbid contact of the shore as possible and at a consistent depth below the water surface. <br /> The downstream and upstream river sites will be sampled from peninsular points. Samples will <br /> be collected using a clean sampling container attached to a pole and sampling at least 2 feet <br /> beyond the turbid contact and—2 feet below the water's surface. <br /> Ground Water Sampling Procedure <br /> In order to obtain representative samples from the ground water sources, stagnant water must be <br /> evacuated from the well casing and immediate ground material. This requires, after taking the <br /> standing water level of the well, that the stagnant water be either mechanically or manually <br /> removed.All groundwater wells will be equipped with dedicated pumps.A minimum of three <br /> borehole volumes will be purged from the well, and samples will be considered representative <br /> when the field parameters measurements between samples, collected at least 2 gallons from one <br /> another,vary within 1%of each other. <br /> Slick Rock Project Groundwater Sampling and Analysis Plan-2025 <br /> Slick Rock NOI Modification July 2025 <br /> Appendix C Page 28 of 35 <br />