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DGM Environmental Monitoring QAPP <br /> Section 5 SAMPLING AND MONITORING <br /> Two aspects of sampling and monitoring are addressed in this section: 1) procedures <br /> and 2) equipment. Sampling and monitoring procedures are written descriptions of how <br /> specific samples are taken, how monitoring is performed, and how measurements are <br /> taken. Sampling and monitoring equipment include tools, installations, devices and <br /> instruments used in sample acquisition and monitoring of study conditions. <br /> 5.1 Sampling and Monitoring Procedures <br /> All sampling and monitoring procedures in use under this plan apply techniques <br /> designed to provide reproducible and defendable data. Unless specified otherwise <br /> within task specific descriptions, all sampling and monitoring is subject to the QA/QC <br /> functions described within this QAPP. Water sampling and monitoring procedures are <br /> developed with the goal of meeting the general guidelines provided in EAP Ground- <br /> Water and Surface-Water Sampling Guidelines (included by reference) and providing <br /> quality samples whose analytical results can be compared to CDPHE Water Quality <br /> Control Division Regulation 32 (Surface Water) and Regulation 41 (Ground Water) <br /> most restrictive standards and other standards as required and specified. <br /> Examples of good general water sampling procedure guidance and sampling <br /> methodology considerations include ASTM Standard D7069 - Standard Guide for Field <br /> Quality Assurance in a Groundwater Sampling Event, ASTM D5358-93(2019) <br /> Standard Practice for Sampling With a Dipper or Pond Sampler and associated <br /> referenced ASTM standards as well as guidance offered by the U.S. Environmental <br /> Protection Agency include the EPA Science and Ecosystem Support System Division's <br /> SESD Operating Procedures for Groundwater Sampling (SESDPROC-301-R4) and <br /> SESD Operating Procedures for Surface Water Sampling (SESDPROC-201-R4) and <br /> the EPA Office of Solid Waste and Emergency Response's Ground-Water Sampling <br /> Guidelines for Superfund and RCRA Project Managers (EPA/542-S-02-001). All of <br /> which are incorporated herein by reference. <br /> These basic sampling principles will be followed: use of pre-established sampling plans, <br /> use of clean uncontaminated containers, labeling of containers, decontamination of <br /> sampling equipment prior to sampling, preservation and field preparation of samples <br /> (when appropriate), adherence to established sample custody and chain of custody <br /> practices, sample data management and use of quality assurance samples (such as <br /> trip and equipment blanks when appropriate). <br /> Exhibit G of the permit application addresses "baseline" monitoring of groundwater and <br /> surface water at established locations on the mine site and Grape Creek. Appendix F of <br /> the permit application addresses groundwater sampling of environmental monitoring <br /> wells, monitoring of water parameters in the contact water pond, monitoring of the <br /> Filtered Tailings Storage Facility (FTFS) underdrain flow, phreatic surface development, <br /> and integrity and stress level assessment. It is anticipated that as construction and <br /> Page 5 <br />