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for the conversion of the casing radius from inches to <br /> feet for 2-inch diameter wells and the conversion of <br /> cubic feet to gallons, and pi (A). This factor would <br /> change for different diameter wells. <br /> The purged volume of water will be measured using a five-gallon bucket to verify <br /> that the static volumes in the wells are evacuated prior to sample collection. Should <br /> the well purge dry prior to three casing volumes being removed, samples will be <br /> collected first draw after appropriate recharge. <br /> 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 the field sheets in <br /> Appendix A. The meters will be cleaned and calibrated prior to measurements. <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 <br /> sample collection will be marked on the bottle along with who collected the sample and <br /> the site 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 <br /> run, the date and time collected, sample identification, and who assembled the sample. <br /> The samples will be delivered to the lab on the day of sample collection, or stored below <br /> 6°C in a refrigerator until delivery is available on the following day. Dissolved <br /> parameters are 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 /> 13 <br />