Jump to main content.


Local Navigation


Record of Decision System (RODS)

NAVAL SURFACE WARFARE CENTER - DAHLGREN

Abstract

Site Name:  NAVAL SURFACE WARFARE CENTER - DAHLGREN
Address:  2 MI E OF INTER 301 & 206 
City & State:  DAHLGREN  VA  22448
County:  KING GEORGE
 
EPA ID:  VA7170024684
EPA Region:  03
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/541/R-00/023
ROD Date:  09/28/2000
Operable Unit(s):  15
 
Abstract:  According to an U.S. Environmental Protection Agency study of aerial photographs, bridge, and road building activities in the immediate vicinity of Hideaway Pond began during the late 1930s and early 1940s. In 1953 the bridge and road across the drainage were combined to form a dam that caused the stream to flood to the north. By 1981, flooding had begun south of the dam, and in 1983 a new dam was constructed approximately 400 feet north of Bagby Road. The area between the new dam and the original dam was flooded and the old roadway and dam that formed the original pond were largely removed.

Other activities that occurred upstream (near the tributaries draining into Hideaway Pond) included the construction of Building 1400. Another area upstream of Hideaway Pond, just north of Building 1400 and south of U.S. Highway 301, was used for 8 years in the early 1970s as a sanitary landfill operation (Site 17, 1400 Area Landfill) following excavation activities associated with gravel mining. Two streams that flow south on either side of Site 17 merge and continue south into Hideaway Pond. Wastes at Site 17 include primarily municipal garbage, which was deposited, compacted, and covered on a periodic basis.

Recreational fishing in Hideaway Pond was permitted until 1980, when the NSWCDL requested that fish tissue samples be tested in an attempt to substantiate an anonymous report that Hideaway Pond might be contaminated with mercury. A catch-and-release policy was instituted after mercury was found in the fish. In 1990, the majority of the pond was drained in an attempt to change the fish community from dominance by gizzard shad to a bluegill-largemouth bass community. There were no special efforts made to remove all the fish, however, most of the fish were either released downstream or perished at the site. The pond was subsequently refilled and restocked for catch-and-release only. At present, recreational fishing occurs on occasion; however, restrictions prohibit the consumption of fish because of the potential presence of mercury. Fishing is allowed on a catch-and-release basis only, and signs are posted at the pond prohibiting consumption of the fish. Analysis of the fish has continued on an annual basis.

No enforcement actions have been taken at Site 10. The Navy has owned the property since 1918 and is identified as the responsible party.

Other activities that occurred upstream (near the tributaries draining into Hideaway Pond) included the construction of Building 1400. Another area upstream of Hideaway Pond, just north of Building 1400 and south of U.S. Highway 301, was used for 8 years in the early 1970s as a sanitary landfill operation (Site 17, 1400 Area Landfill) following excavation activities associated with gravel mining. Two streams that flow south on either side of Site 17 merge and continue south into Hideaway Pond. Wastes at Site 17 include primarily municipal garbage, which was deposited, compacted, and covered on a periodic basis.
 
Remedy:  This selected remedy fits the Navy strategy to reduce risks at all Naval Surface Warfare Center Dahlgren Site (NSWCDL) sites with minimal long-term care. Site 3-Ordnance Burn Structure and site 44-Rocket Motor Pit (site 3/44) soils are clean and require no future monitoring, allowing the Navy to focus its resources on the remaining NSWCDL sites. Groundwater sampling at site 3/44 indicated the presence of volatile organic compounds (VOC) and other constituents; however the pattern of contaminants detected in the shallow groundwater at site 3/44 indicate the contaminants of concern (COCs) are attributable to naturally occurring conditions or to the adjacent site 12 and are not attributable to site 3/44. The selected remedy identified in this Record of Decision addresses site 3/44 as discussed in the Engineering Evaluation/Cost Analysis and the Risk Investigation/Feasibility Focus Study (RI/FFS).

Estimated Capital Costs: Not provided.
Estimated Annual O&M Costs: Not provided.
Estimated Present Worth Costs: Not provided.
 
Text:  View full-text ROD [ 272K ]
To download a full-text ROD, right click on the above link and select Save Link As. A full-text ROD is in PDF format. Please note that download time may be extended given the size of the full-text document. File size is noted in kilobytes (K) or megabytes (M) next to the download link.
About Adobe Portable Document Format
 
Return to Search Results    Return to RODS List

OSWER Home | Superfund Home


Jump to main content.