FY 1995 Remedial Investigation Work Plan for Waste Area Grouping 2 at Oak Ridge National Laboratory, Oak Ridge, Tennessee Page: 10 of 51
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EXECUTIVE SUMMARY
Field activities to support the remedial investigation (RI) of Waste Area Grouping
(WAG) 2 at Oak Ridge National Laboratory (ORNL) include characterization of the nature
and extent of contamination in WAG 2, specifically to support risk-based remediation
decisions. WAG 2 is the major drainage system downgradient of other WAGS containing
significant sources of contamination at ORNL. The RI of WAG 2 is developed in three
phases: Phase I, initial scoping characterization to determine the need for early action;
Phase II, interim activities during remediation of upgradient WAGs to evaluate potential
changes in the contamination status of WAG 2 that would necessitate reevaluation of the
need for early action; and Phase III, completion of the RI process following remediation of
upslope WAGS. Specifically, Phase II activities are required to track key areas to determine
if changes have occurred in WAG 2 that would require (1) interim remedial action to protect
human health and the environment or (2) changes in remedial action plans and schedules for
WAG 2 because of changing contaminant release patterns in upslope WAGs or because of
the effects of interim remedial or removal actions in other WAGs. This report defines
activities to be conducted in FY 1995 for completion of the Phase I RI and initiation of
limited Phase II field work.
At the June 1994 Data Quality Objective (DQO) Workshop, representatives of the U.S.
Environmental Protection Agency (EPA) and the Tennessee Department of Environment and
Conservation (TDEC) (i.e., the regulators) recommended separating the existing WAG 2 and
Site Investigations (SI) Project from FY 1995 forward into two major stand-alone
components: the WAG 2 RI and the ORNL Surface Water Program. The RI component is
to complete Phase I RI work in FY 1995, initiate limited high-priority Phase II sampling
activities in FY 1995, and conduct other specific tasking directed by the DQO process and
regulator inputs. The SI component will become the core of a new organizational structure
in the ORNL Environmental Restoration (ER) Program: the ORNL Surface Water Program,
with tasking determined by ORNL ER Program management needs. In addition, the
groundwater elements from the WAG 2 & SI Project will also be completed in the short term
with continuing elements consolidated into the new ORNL Area Groundwater Program. The
watershed-level groundwater efforts that are now part of the WAG 2 & SI Project will
transition to the Area Groundwater Program. The ORNL Surface Water Program and Area
Groundwater Program will provide the required support for the restoration of individual
WAGs or operable units and integrate information and activities across the ORNL site. The
WAG 2 RI will continue to focus on providing information specific to the remediation of
WAG 2.
Federal Facility Agreement (FFA) managers, which include the DOE Oak Ridge
Operations Office, EPA, and TDEC, have directed that FY 1995 RI work activities
concentrate exclusively on meeting FFA requirements- specifically, (1) that a separate
FY 1995 WAG 2 RI Work Plan be developed to replace the other project-level annual
technical task scoping/planning documents previously specified in Appendix E of the FFA and
(2) that the Work Plan be designated as the FFA FY 1995 deliverable for the WAG 2 RI.
This report outlines the immediate activities needed to complete the WAG 2 Phase I RI in
FY 1995, with emphasis on analysis of existing data, data interpretation, and reporting ofix
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Watkins, D. R. & Herbes, S. E. FY 1995 Remedial Investigation Work Plan for Waste Area Grouping 2 at Oak Ridge National Laboratory, Oak Ridge, Tennessee, report, December 1, 1994; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc1279955/m1/10/?rotate=270: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.