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Ground Water Samphng <br /> i <br /> 2 SAMPLINGAND ANALYSIS <br /> All procedures and techniques used for site characterization, ground-water monitoring well <br /> installation and development, sample collection, sample preservation and shipment, analytical <br /> procedures, and chain-of-custody control should be specified in a Sampling and Analysis Plan <br /> (SAP) RPs and field personnel should follow the SAP wlvle performing the site charactenzation, <br />' installing and developing monitoring wells, and collecting and analyzing ground-water samples <br /> A descnption of dates anticipated for initiation, milestones, and completion of project and <br /> monitoring activities should be provided A milestone table or a bar chart consisting of project <br /> tasks and time lines is appropriate for inclusion m the SAP <br />' 21 Elements of Sampling and Analysis Programs <br /> The SAP consists of a Field Sampling Plan (FSP) and a Quality Assurance Project Plan(QAPP) <br /> At a minimum, the SAP should include information on <br />' o Sampling objectives, <br /> o Pre-sampling activities, <br /> a Sample collection, <br /> o In-situ or field analyses, <br />' o Sample preservation and handling, <br />' o Cham-of-custody control and records management, <br /> o Analytical procedures and quantitation limits for both laboratory and field <br />' methods, <br /> U Field and laboratory quality assurance/quality control, <br />' U Evaluation of data quality,and <br /> o Health and safety plan <br /> The SAP should also include procedures for conductor the site characterization installing <br /> g <br /> and developing ground-water momtonng wells, and implementing other momtonng <br />' programs(e g , vadose zone monitoring and monitoring of spnngs) <br /> ZZ Pre-Sampling Activities <br /> 1 2.2.1 Measurement of Static Water Level Elevation <br /> The SAP should include provisions for measuring the static water elevation in each <br /> well and the depth of each well prior to each sampling event Measurement of <br /> water level elevations on a continuing basis is important to determine whether <br /> horizontal and vertical components of the hydraulic gradient have changed since <br /> 2 <br />