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ATTACHMENT D <br />SCOPE OF WORK FOR A FACILITY INVESTIGATION WORKPLAN <br />A. Facility Investigation Workplan (Workplan). <br />The Workplan shall define, where applicable the following procedures necessary <br />to: <br />o Gather all necessary data to determine where interim measures are <br />needed and to support the use of interim measures to address immediate <br />threats to human health and/or the environment, to prevent or minimize <br />the spread of contaminants, to control sources of contamination and to <br />accelerate the corrective action process (required for all releases),- <br />0 <br />eleases); <br />o Characterize the presence, magnitude, extent (horizontal and vertical), <br />rate of movement and direction of any ground water contamination in and <br />around the facility (only required for releases to ground water); <br />o Characterize the geology and hydrogeology in and around the facility (only <br />required for releases to ground water and possibly for releases to soil); <br />o Characterize the presence, magnitude, extent (horizontal and vertical), <br />rate of movement and direction of any soil contamination in and around <br />the facility (only required for releases to soil); <br />o Characterize the presence, magnitude, extent (horizontal and vertical), <br />rate of movement and direction of any soil gas contamination in and <br />around the facility (may be required for releases to ground water and/or <br />soil depending on the circumstances); <br />o Characterize the presence, magnitude, extent (horizontal and vertical), <br />rate of movement and direction of any surface water contamination <br />(includes surface water sediments) at the facility (only required for <br />releases to surface water); <br />o Characterize the presence, magnitude, extent (horizontal and vertical), <br />rate of movement and direction of any air releases at the facility (only <br />required for air releases); <br />o Characterize any potential sources of contamination (required for all <br />releases); <br />SCOPE OF WORK FOR A FACILITY INVESTIGATION WORKPLAN <br />ATTACHMENT D PAGE 1 <br />