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[SWMU B-9]

SWMU B-9 Work Plan

RL17 Project, February 1996

Soils: Brackett Soils (12-30 percent slopes)

Known: Records indicate that SWMU B-9 was a disposal area for miscellaneous solid waste (metal debris) (ES, 1993b).  The site is adjacent to foxhole trenches, which are cultural resources and cannot be disturbed during field activities.  SWMU B-9 is south of AOC 44 and is approximately 0.1 acre in size.  This area is surrounded by AOC 51.

Previous investigations: A field investigation revealed stressed vegetation but no indication of ordnance.

Data Needs: Map, geophysical survey, analytical data for surface soils and soil borings.

Closure Activities: The field team should be observant for UXO. The following field activities will be performed to gather data for TNRCC closure submittal of SWMU B-9.

SWMU B-9 Field Effort 1

  1. Review historical records as described in Section 2.4.1 of the Work Plan Overview.

  2. Field map SWMU as described in Section 2.4.1 of the Work Plan Overview.

  3. Conduct a geophysical survey of the SWMU as described in Section 2.4.1 of the Work Plan Overview.

  4. Sample and analyze surface soils from three pre-identified locations as described in Section 2.4.1 of the Work Plan Overview.  Analyze each sample for SVOCs, VOCs, explosives, and metals (as outlined in the FSP).  Compare analytical results to background levels for soils (Section 2.4.1 of the Work Plan Overview).

SWMU B-9 Field Effort 2

  1. If any surface samples taken during the first field effort have constituent concentrations exceeding background levels or if subsurface anomalies are evident, three soil borings will be drilled to characterize the subsurface soils.

  2. Locate, receive approval, and drill three borings at surface sample locations exceeding background concentrations.

  3. Obtain two samples per boring near middle and total depths (surface soils were previously sampled) in accordance with Section 2.4.1 of the Work Plan Overview.

  4. Analyze each subsurface sample for SVOCs, VOCs, explosives and metals identified in the surface soils (as outlined in the FSP).

  5. Water is not expected to be encountered at the site.  However, if water is discovered in any of the soil borings, all three borings will be sampled and potentially completed as groundwater monitor wells as detailed in Section 2.4.1 of the Work Plan Overview. Sample groundwater, where present, and analyze each sample for the metals, explosives, and VOCs (as outlined in the FSP).

  6. Handle the IDW in accordance with the FSP.