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GeosMte& <br /> consultants <br /> 1. INTRODUCTION <br /> This Quality Assurance Project Plan (QAPP) provides a standard reference for the <br /> sampling and analysis activities described in the Groundwater Monitoring Work Plan <br /> (Work Plan) for Rough and Ready Island, Port of Stockton, located in Stockton, <br /> California (the Site). This QAPP replaces the QAPP included in the 2024 Groundwater <br /> Monitoring Work Plan (2024 QAPP; Geosyntec, 2024) and encompasses the methods <br /> and procedures described in the 2024 QAPP. <br /> This QAPP describes the quality assurance (QA)/quality control (QC) specifications for <br /> assuring the reliability of monitoring and measurement data for Site data collection and <br /> analyses. The procedures outlined in this QAPP govern the acquisition of environmental <br /> samples and the reporting of data, sampling, sample handling and chain of custody <br /> protocols, laboratory and field analyses, field documentation, data reporting, quality <br /> auditing, corrective action processes, and the data handling and management of records. <br /> This QAPP addresses the elements described in the Requirement for Quality Assurance <br /> Project Plans (United States Environmental Protection Agency [U.S. EPA], 2001a). <br /> Quality Assurance Project Plan 1 30 April 2025 <br />