[Home]

[SWMU B-11]

SWMU B-11 Work Plan

RL53 Project, May 2000

Soils: Trinity and Frio soils

Known: B-11 was thought to be a miscellaneous trash disposal area.

Previous Investigations: Evidence of subsurface disturbance/trash on surface: geophysical survey conducted-zero anomalies found.

Data Needs: Map, analytical data for surface and subsurface soils.

Rationale for Analytical Program: Based on prior usage at the site as a miscellaneous solid waste disposal of ammunition, scrap metal and construction debris, chemicals of potential concern include VOCs, metals and explosives. Metals (arsenic, barium, cadmium, chromium, copper, lead, mercury, nickel and zinc) are included due to the potential metallic nature of the waste. Ammunition may include explosives residue therefore, an analysis for explosives will be conducted. VOCs analysis is included in the analytical program to detect typical contaminants associated with a disposal area. SVOCs are not included at this site since no evidence of waste burning has been found.

Closure Activities: The following activities constitute an initial investigation of solid waste management unit B-11.

SWMU B-11 Field Effort 1

  1. Notify TNRCC of intent to perform work on the site.

  2. Review historical records.

  3. Create a field map of the area.

  4. Five soil borings will be drilled to characterize the subsurface soils surrounding the area. Three soil samples will be collected from each boring; one at the surface, one near the middle of the boring and one at the total depth. The total depth of each boring will be approximately 20 feet or until bedrock is encountered. Each sample will be analyzed for VOCs, explosives, and metals.

  5. Water is not expected to be encountered in the borings at the site. However, if water is discovered in any of the soil borings, all borings will be sampled and may be completed as groundwater monitoring wells as detailed in Section 2.4.1 of the Work Plan Overview. Groundwater will be sampled, where present, and each sample will be analyzed for VOCs, explosives, and metals identified in the soil samples.

  6. IDW will be handled as specified in the FSP.

  7. If the results of the above work indicate that the site can be closed under RRS1 without any further investigation and/or remediation, a technical/closure report will be prepared and submitted in accordance with TNRCC closure requirements. If the site does not meet RRS1 closure requirement, a technical report and recommended additional investigation and/or remediation will be prepared.