ARCHIVED REPORTS_XR0005851 CASE 2

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