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Data Quality Objectives Summary Report - Designing a Groundwater Monitoring and Assessment Network for the 100-BC-5 and 100-FR-3 Operable Units

2003

Abstract

The 100-BC-5 and 100-FR-3 Operable Units are defined for groundwater beneath the 100-B/C and 100-F Areas, respectively. Each operable unit has undergone a limited field investigation and qualitative risk assessment as part of the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA) remedial investigation process. Although decisions have been made to perform active remediation of contaminant sources, no decision has yet been made concerning remedial actions for groundwater at either operable unit. During this interim period, groundwater monitoring has been conducted in accordance with groundwater sampling and analysis plan for the 100-BC-5 Operable Unit (Sweeney 2002a) and 100-FR-3 Operable Unit (Sweeney 2002b) under Federal Facility Agreement and Consent Order (TPA) change control agreements between the U.S. Department of Energy (DOE) and U.S. Environmental Protection Agency (EPA). This report is the culmination of the decision process that will guide future data acquisition at these two operable units. The data gathered will be used to develop future closure decisions, leading ultimately toward a record of decision for the 100-BC-5 and 100-FR-3 Operable Units. Detailed background information that includes facility description, groundwater flow directions, monitoring network and monitoring constituents, constituents of potential concern, summary of groundwater contamination levels, sources of groundwater contamination, and contaminant distribution maps and trend charts is presented in Appendix A. The following Data Quality Objectives (DQO) process is used to update the groundwater sampling and analysis schedules to reflect new information since the TPA agreement schedules were developed, and to reflect changing conditions at each operable unit as a consequence of surface-operable unit remedial actions as defined in Guidance on Systematic Planning for Environmental Data Collection Using Performance and Acceptance Criteria (EPA QA/G-4 1994). The product of this combined DQO process will be a separate sampling and analysis plan (SAP) for each of the operable units. The SAPs will be submitted to EPA by DOE and, when approved, will become part of the Administrative Record for these units, and will supercede the previous plans and TPA Change Control agreements.

Abstract

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