Soils: Crawford and Bexar stony soils.
Known: The site is located south of deer stand 41 in the East Pasture, and is approximately 1 acre in size. Three barrels containing rocks are located at the site.
Previous Investigations: None.
Data Needs: Map, geophysical survey and analytical data (VOCs, SVOCs, explosives and metals) for subsurface data.
Rationale for Analytical Program: Based on the presence of 3 barrels at the site (that now contain rocks) chemicals of potential concern include VOCs, SVOCs, metals and explosives. Past contents of the drums and the type of waste disposal in the area are unknown. Metals (arsenic, barium, cadmium, chromium, copper, lead, mercury, nickel, and zinc) are included due to the possible metallic nature of the waste. UXO, if found, 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 included at this site since waste burning may have occurred.
Closure
Activities: The following
activities constitute an initial investigation of the area of concern 63.
This work will be completed as part of the requirements under the RCRA
3008(h) Order, but it is not currently included in any delivery order.
Field map AOC 63 as described in Section 2.4.1 of the Work Plan Overview.
Properly dispose of drums and their contents.
Remove any vegetation necessary to complete field activities listed below. If any potential UXO is observed during field activities, work will cease until UXO specialists are brought on site to identify and remove UXO.
Conduct a geophysical survey, as described in Section 2.4.1 of the Work Plan Overview, of the mapped site to identify any anomalies. A ground penetrating radar (GPR) device and an EM-31 instrument will be used to complete the geophysical survey. The locations of four of the corners of the survey points will be recorded using a GPS unit. Analysis of the EM data will follow field activities.
If the survey information indicates an anomaly is present, complete two soil borings to characterize the subsurface soils surrounding the anomaly. Two soil samples will be collected from each boring. The total depth of each boring will be approximately 10 feet. Each sample will be analyzed for VOCs, SVOCs, explosives, and metals. QA/QC samples will be collected as described in Section 2.4 of the FSP.
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 described in Section 2.4.1 of the Work Plan Overview. Groundwater will be sampled, where present, and each sample will be analyzed for VOCs, SVOCs, explosives and metals. QA/QC samples will be collected as described in Section 2.4 of the FSP.
IDW will be handled as specified in the FSP.
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 requirements, a technical report describing the results of the investigation and recommended additional investigation and/or remediation will be prepared.