Soils: Trinity and Frio (near creek), Krum Complex

Known: Records indicate an artillery shell burn area.

Previous investigations: No geophysical anomalies were detected (Parsons ES, 1995c).
See Figure B22-1.

Data Needs: Analytical data (VOCs, metals, explosives) for surface soils.

Closure Activities: Personnel should be aware of the potential for UXO at the site. The following field activities will be performed to gather data for TNRCC closure submittal of SWMU B-22.

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

2. Sample and analyze surface soils at the five approximate locations shown on Figure B22-1 as described in Section 2.4.1 of the Work Plan Overview. While the technical proposal stated that three surface soil samples would be made at each low priority SWMU and B-22 is a low priority site, the site is an estimated 22 acres, therefore, Parsons ES proposes five surface soil samples to provide adequate investigation of the site for TNRCC closure. Analyze each sample for VOCs, metals, and explosives (as outlined in the FSP) Compare analytical results to background levels for soils (Section 2.4.1 of the Work Plan Overview).

1. If any surface samples taken during the first field effort have constituent concentrations exceeding background levels, five soil borings will be drilled to characterize subsurface contamination. While the technical proposal stated that three soil borings would be made at each low priority SWMU and B-22 is a low priority site, the site is an estimated 22 acres, therefore, Parsons ES proposes five borings to provide adequate investigation of the site for TNRCC closure.

1. Locate, receive approval, and drill five 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 at middle and total depths (surface soils were previously sampled) in accordance with Section 2.4.1 of the Work Plan Overview.

3. Collect and analyze subsurface samples for the metals, explosives, and VOCs found in the surface soil samples (as outlined in the FSP).

2. 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 those metals, explosives, and VOCs found in surface soil samples (as outlined in the FSP).

3. Handle the IDW in accordance with the FSP.