| STATUS | |
|---|---|
| RRSE Rating | Contaminants |
| High | PCBs, As, Pb, PAHs |
| Media of Concern | Completed IRP Phase |
| Soil, Groundwater, Sediment | PA/ SI |
| Current IRP Phase | Future IRP Phase |
| RFI/ CMI(C) | RFI/CMS/CMI(C) |
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SITE DESCRIPTION
The CFI Lease Area site consists of approximately 686 acres located along the western boundary of VOAAP. Of these 686 acres, only approximately 56 acres correspond to the actual production facilities. The area contains a number of former plant facilities for the production, handling, and storage of nitric acid, ammonium nitrate, and urea, as well as sulfuric acid concentration facilities.
In addition, former urea and fertilizer manufacturing facilities were located at this site. A CS was performed in 1994 and RFI in 1995. The results of the CS and RFI indicated that a remedial action was necessary; therefore, a CMS was developed. Subsequent to the review of the draft CMS, it was determined that further delineation of the extent of contamination would be required before a final CMS could be completed. The supplemental sampling was completed in 1999. Results indicate contamination in soil surrounding the former production buildings is more widespread than originally believed.
The vertical extent of soil contamination above proposed preliminary remediation goals (PRGs) is limited to the upper 10 feet. An EBS performed in 2003 revealed the presence of a toluene distribution network, including a pipeline extending the length of the area from north to south to the toluene tanks. Portions of this pipeline have been evaluated, but additional investigation will be required of the toluene distribution system to determine if there were leaks. The draft RFI was prepared to document the nature and extent of contamination at the site, and included a RFA for the non-production areas. The final RFA/RFI was submitted in mid-2004.
A Phase II Environmental Site Assessment (ESA) was conducted in late 2003 which included investigations of two smaller AOCs within the CFI Lease Area. These sites were identified in the 1984 EPIC study as Site 4 and Site 9. EPIC Site 4 includes a possible redwater ash disposal area, several possible pits, and debris piles; EPIC Site 9 contains two potential fill areas, two debris areas, and three pits and two mounded areas that were to be assessed in the ESA.
PROPOSED PLAN
The Final Interim Corrective Measures Work Plan for removal of contamination associated with the industrial area was approved on June 9, 2004. As part of the interim action, it is anticipated that metals-impacted soils will be excavated, stabilized onsite and then disposed of offsite. Other contaminated soils (cPAHs and PCBs) will be disposed of offsite in conjunction with the stabilized metals-impacted soils. Approximate volume of soils to be removed is 15,382 cy. Although it is anticipated that the ICM will be the final action, the Army may conduct additional actions if required.
Because of their extent, the toluene pipeline, dock area, and associated toluene tanks will be administratively removed from the CFI Lease Area and assessed separately from VAAP-02. The toluene distribution system will be defined as a new AEDB-R site, and will include areas outside of the CFI Lease Area.
Any groundwater contamination and LTM will be addressed under VAAP-35.
