Known: No anomalies associated with waste management practices were observed during the geophysical survey activities in May 1995.

Previous Investigations: Site was field mapped and three surface soils were collected on 5 March 1996. Each sample was analyzed for VOCs, metals, and explosives by ITS Laboratory. In March 1997, the vegetation at the site was cleared and a sweep for UXO was completed. Only a small amount of surface debris was found and removed.

Planned Rework: Replace analytical chemistry data generated by ITS Laboratory. To accomplish this, recollect three surface soil samples from the approximate locations of the first set of surface soil samples. These samples will be called RW-B7-SS1, RW-B7-SS2, and RW-B7-SS3. Analyze samples for VOCs, metals, and explosives.

Rationale for Analytical Program: Based on prior usage at the site as a fired small arms ammunition brass area, 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 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 included at this site since no evidence of waste burning has been found.

Resampling Activities: The following field activities will be performed to gather data for TNRCC closure submittal of SWMU B-7:

1. Field locate previous sample locations (collected in 1996).

2. Collect three surface soil samples in the approximate locations of the first three surface soil samples in accordance with the FSP. Sample locations are shown in Figure B7-1. QA/QC samples will be collected as described in Section 2.4 of the FSP.

3. Analyze each rework sample for VOCs, metals and explosives according to the following table. Metals include arsenic, barium, cadmium, chromium, copper, lead, mercury, nickel, and zinc.

4. Water is not expected to be encountered in the borings at the site. If water is discovered in any of the soil borings, it will be reported to AFCEE and CSSA immediately. Completion of wells is beyond the scope of this rework as no monitoring wells were previously installed at the site.

5. Handle IDW as specified in the FSP.

6. Analytical results for the data quality rework samples will be reported in the Rework ITIR.

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 under the RL17 SOW and submitted in accordance with TNRCC closure requirements. If the site does not meet RRS1 closure requirements, a technical report describing the results of the investigation and recommended additional investigation and/or remediation will be prepared under the RL17 SOW.

Notes: TBD = To be determined
Metals = Arsenic (SW7060), barium (SW6010), cadmium (SW7131), chromium (SW6010), copper (SW6010), lead (SW7421), mercury (SW7470), nickel (SW6010), and zinc (SW6010)