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3.2.4.4 Field Measurements <br /> Measurement of pH, temperature, and specific conductivity will be collected in the field. <br /> Visual and olfactory observations will be documented on field sheets. The meters will be <br /> cleaned and calibrated prior to measurements. Sample field and instrument calibration <br /> sheets are shown in Appendix A. <br /> 3.2.4.5 Handling of Sample Bottles <br /> Water will be pumped or collected directly into sample bottles. The date and time of sample <br /> collection will be marked on the bottle along with who collected the sample and the site <br /> location. Samples will then be placed in a cooler with ice. <br /> 3.2.4.6 Chain of Custody <br /> A chain of custody form will be completed and will indicate what analysis needs to be run, <br /> the date and time collected, sample identification, and who assembled the sample. The <br /> samples will be delivered to the lab on the day of sample collection, or stored below 6°C <br /> in a refrigerator until delivery is available on the following day. Dissolved parameters are <br /> to be filtered by the laboratory. <br /> 3.3 Analytical Procedures: Comparison to State Water Quality Standards <br /> The analytical results will be compared to the regulatory limits established by the <br /> Colorado Water Quality Control Commission. The groundwater water quality data from <br /> these wells will be compared to standard values in Tables 1-4 of CDPHE Regulation 41. <br /> In the case of multiple standards, the more stringent standard will apply. Analytical results <br /> from baseline water quality sample collection will be used to determine if the above <br /> standards are appropriate for all parameters. Should it be determined that background <br /> concentrations of any parameters are elevated due to prior existing activity or ambient <br /> conditions, the Operator will work with DRMS to propose modified standards, considering <br /> pre-mining land use activity. After final standards are established, if exceedances of any <br /> of the water quality standards are detected in POC wells, the Operator will notify DRMS <br /> and initiate a water quality mitigation plan as discussed in more detail below. <br /> 3.4 Water Quality Mitigation Plan <br /> If limits are exceeded, the Operator will implement the following mitigation procedures: <br /> • Notify DRMS of the exceedance within seven days of either receiving the <br /> analytical report from the laboratory or completing the described <br /> regression analysis. <br /> • Identify the potential causes/sources of the exceedance parameters. <br /> • Implement supplemental water quality sampling. If exceedances are <br /> 15 <br />