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[SWMU B-26]

SWMU B-26 - Work Plan RL17 Project

February 1996

Soils: Krum Complex

Known: This area was identified as a trench in a 1966 aerial photo (ES, 1993b). No CSSA documentation regarding the site was found.

Previous Investigations: None.

Data Needs: Location, map, geophysical survey, analytical data (VOCs, SVOCs, and metals) for surface soils.

Closure Activities: Since the site was identified from an aerial photo and was not located during a previous investigation, it may not exist. The aerial photo has a large scale and shows little detail. If the site cannot be definitively located through a records search, a field location activity, or geophysical survey, the site will be delisted. The following field activities will be performed to gather data for TNRCC closure submittal of SWMU B-26.

SWMU B-26 Field Effort 1

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

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

  3. Conduct a geophysical survey, as described in Section 2.4.1 of the Work Plan Overview, of the mapped site if the site is identified, or survey the approximate location of the site if it could not be definitively located.

  4. If the site can be definitively located, sample and analyze surface soils from a minimum of three locations as described in Section 2.4.1 of the Work Plan Overview. Analyze each sample for VOCs, SVOCs, and metals (as outlined in the FSP).

  5. If the site cannot be definitively located through a geophysical survey and records review, then the site will be delisted.

SWMU B-26 Field Effort 2

  1. If a geophysical survey indicates subsurface anomalies, complete the following activities:

  1. Locate, receive approval, and drill three soil borings to provide for subsurface soil sampling.

  2. Obtain three samples per boring near the surface (0-2 foot depth), middle, and total depths as described in Section 2.4.1 of the Work Plan Overview.

  3. Analyze each sample for SVOCs, VOCs, and metals (as outlined in the FSP).

  1. If any surface samples taken during the first field effort have constituent concentrations exceeding background levels, three soil borings will be drilled to identify the vertical extent of contamination.

  1. Locate, receive approval, and drill three borings at surface sample locations exceeding background concentrations as described in Section 2.4.1 of the Work Plan Overview.

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

  3. Sample and analyze each subsurface sample for SVOCs, metals, and VOCs indicated in the surface soils (as outlined in the FSP).

  1. Water is not expected to be encountered at the site. However, if water is discovered in any of the soil borings, 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 SVOCs, metals, and VOCs indicated in the surface soils (as outlined in the FSP).

  2. Handle the IDW in accordance with the FSP.