FORMERLY USED DEFENSE SITE INSTALLATION ID: VA39799F166700
CHOPAWAMSIC TROOP TRAINING SITE
triangle, Virginia
Cost So Far
$276K
Money already spent on the evaluation and cleanup of hazardous sites.
Expected Additional Cost
$35.2M
The estimated amount of money needed for evaluation and cleanup of hazardous sites at this installation.
Completion Date
2024
The date the DOD says cleanup of all sites was completed. Long term monitoring may continue after this date.
This 11,011-acre site is now known as the Prince William Forest National Park, located in Triangle, Virginia. The site was used as a troop-training installation for the Office of Strategic Service for counterintelligence agents. This property is... see more » This 11,011-acre site is now known as the Prince William Forest National Park, located in Triangle, Virginia. The site was used as a troop-training installation for the Office of Strategic Service for counterintelligence agents. This property is known or suspected to contain military munitions and explosives of concern (e.g., unexploded ordnance) and therefore may present an explosive hazard. Also included were three target ranges, magazine, and a heating plant. It is now used for recreation and as a forest preserve. Mr. Phil Bureck, of the Prince William Forest Park, stated by telephone on 6 May 1991 that he does not know of any remaining Army facilities on die lands of the National Park. (Source: U.S. Army Corps of Engineers) « see less
3 Hazardous Sites
Below are the locations of hazardous sites associated with this military installation, according to the DOD. A site’s contamination may affect a much larger area, including public and private lands and the water supplies beneath them.
High Risk
Medium Risk
Low Risk
Risk Not Evaluated or Not Required
Response Complete
We haven't independently confirmed the location of every site. If you notice a site placed at the incorrect location, please contact us.
Not all sites in the DOD data include location information, so there may be sites listed below that are missing from the map. The risk level of a site refers to a relative risk assessment made by the DOD to prioritize the cleanup of sites.
3 Active Sites
Sites where military cleanup actions are still ongoing. The risk level of a site refers to a relative risk assessment made by the DOD, which prioritizes the cleanup of sites that pose greatest threat to safety, human health, and the environment.
Site ID: 03OEW
MORTAR, ROCKET AND DEMOLITION RANGES
Multi Use Range
Cost
$17.2M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
Sep 2024
This site is under ongoing monitoring until Sep 2055
Contaminated Areas
Sediment (Ecological): Medium Risk
Contaminants: Mercury 0.028 mg/kg Cadmium 0.13 mg/kg Antimony 0.42 mg/kg Selenium 0.51 mg/kg Arsenic 2.6 mg/kg Lead 10.4 mg/kg Cobalt 11.8 mg/kg Nickel 12.5 mg/kg Copper 27.8 mg/kg Barium 74.3 mg/kg Zinc 77.0 mg/kg Manganese 736.0 mg/kg Aluminum 7500.0 mg/kg Iron 29000.0 mg/kg
Soil: Medium Risk
Contaminants: Mercury and compounds 0.19 mg/kg Silver 0.38 mg/kg Cadmium 0.57 mg/kg Selenium 0.97 mg/kg Molybdenum 1.2 mg/kg Beryllium 1.5 mg/kg Antimony 2.4 mg/kg Strontium 18.4 mg/kg Cobalt 19.7 mg/kg Copper 39.5 mg/kg Lead 79.0 mg/kg Total Chromium (1:6 ratio Cr VI:Cr III) 92.6 mg/kg Vanadium 93.8 mg/kg Manganese 621.0 mg/kg Titanium 806.0 mg/kg Zinc 2290.0 mg/kg Iron 39300.0 mg/kg
Surface Water (Ecological): Medium Risk
Contaminants: Beryllium 0.054 ug/L Lead 0.64 ug/L Copper 1.7 ug/L Nickel 1.8 ug/L Cobalt 1.9 ug/L Zinc 21.2 ug/L Barium 44.7 ug/L Manganese 964.0 ug/L Iron 1030.0 ug/L
Surface Water (Human): Medium Risk
Contaminants: Beryllium 0.054 ug/L Molybdenum 0.32 ug/L Lead 0.64 ug/L Copper 1.7 ug/L Nickel 1.8 ug/L Cobalt 1.9 ug/L Zinc 21.2 ug/L Barium 44.7 ug/L Manganese 964.0 ug/L Iron 1030.0 ug/L
Groundwater: Low Risk
Contaminants: Nitrobenzene 0.22 ug/L Perchlorate 1.91 ug/L
Sediment (Human): Low Risk
Contaminants: Mercury and compounds 0.028 mg/kg Cadmium 0.13 mg/kg Molybdenum 0.15 mg/kg Nitrobenzene 0.33 mg/kg Antimony 0.42 mg/kg Selenium 0.51 mg/kg Beryllium 0.72 mg/kg Arsenic 2.6 mg/kg Strontium 4.7 mg/kg Lead 10.4 mg/kg Cobalt 11.8 mg/kg Nickel 12.5 mg/kg Total Chromium (1:6 ratio Cr VI:Cr III) 20.7 mg/kg Copper 27.8 mg/kg Vanadium 37.1 mg/kg Barium 74.3 mg/kg Zinc 77.0 mg/kg Titanium 342.0 mg/kg Manganese 736.0 mg/kg Aluminum 7500.0 mg/kg Iron 29000.0 mg/kg
Site ID: 01OEW
DEMONSTRATION AND SMALL ARMS RANGES
Multi Use Range
Cost
$10.6M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
Sep 2024
This site is under ongoing monitoring until Sep 2055
Contaminated Areas
Soil: Medium Risk
Contaminants: Nitrobenzene 0.041 mg/kg Mercury and compounds 0.13 mg/kg Silver 0.2 mg/kg Cadmium 0.7 mg/kg Antimony 1.1 mg/kg Beryllium 1.4 mg/kg Selenium 1.5 mg/kg Molybdenum 2.9 mg/kg Strontium 40.1 mg/kg Nickel 40.6 mg/kg Cobalt 40.7 mg/kg Lead 53.5 mg/kg Zinc 109.0 mg/kg Vanadium 130.0 mg/kg Total Chromium (1:6 ratio Cr VI:Cr III) 165.0 mg/kg Barium 467.0 mg/kg Copper 605.0 mg/kg Titanium 1140.0 mg/kg Manganese 3680.0 mg/kg Aluminum 39100.0 mg/kg Iron 53500.0 mg/kg
Sediment (Human): Medium Risk
Contaminants: Nitrobenzene 0.031 mg/kg Mercury and compounds 0.051 mg/kg Cadmium 0.068 mg/kg Molybdenum 0.35 mg/kg Beryllium 0.95 mg/kg Antimony 1.1 mg/kg Selenium 1.6 mg/kg Arsenic 3.3 mg/kg Nickel 11.5 mg/kg Lead 13.0 mg/kg Cobalt 14.7 mg/kg Total Chromium (1:6 ratio Cr VI:Cr III) 19.8 mg/kg Strontium 23.7 mg/kg Copper 29.0 mg/kg Vanadium 48.9 mg/kg Zinc 71.0 mg/kg Barium 140.0 mg/kg Titanium 314.0 mg/kg Manganese 699.0 mg/kg Aluminum 13100.0 mg/kg Iron 28700.0 mg/kg
Sediment (Ecological): Medium Risk
Contaminants: Nitrobenzene 0.041 mg/kg Mercury 0.051 mg/kg Cadmium 0.068 mg/kg Antimony 1.1 mg/kg Selenium 1.6 mg/kg Arsenic 3.3 mg/kg Nickel 11.5 mg/kg Lead 13.0 mg/kg Cobalt 14.7 mg/kg Total Chromium (1:6 ratio Cr VI:Cr III) 19.8 mg/kg Copper 29.0 mg/kg Zinc 71.0 mg/kg Barium 140.0 mg/kg Manganese 699.0 mg/kg Aluminum 13100.0 mg/kg Iron 28700.0 mg/kg
Surface Water (Ecological): Low Risk
Contaminants: Thallium 0.28 ug/L Selenium 0.63 ug/L Copper 1.2 ug/L Zinc 11.3 ug/L Barium 22.6 ug/L Iron 786.0 ug/L Potassium 1440.0 ug/L
Surface Water (Human): Low Risk
Contaminants: Selenium 0.63 ug/L Copper 1.2 ug/L Zinc 11.3 ug/L Barium 22.6 ug/L Iron 786.0 ug/L
Site ID: 02OEW
FRAGMENTATION GRENADE RANGE
Grenade Range
Cost
$7.36M
Cost in 2015 plus expected future cost of cleanup
Final Cleanup Action
Sep 2024
This site is under ongoing monitoring until Sep 2055
Contaminated Areas
Soil: Medium Risk
Contaminants: Mercury and compounds 0.24 mg/kg Beryllium 1.6 mg/kg Cadmium 1.6 mg/kg Cobalt 15.5 mg/kg Nickel 22.0 mg/kg Strontium 22.8 mg/kg Vanadium 86.8 mg/kg Copper 92.2 mg/kg Barium 178.0 mg/kg Lead 478.0 mg/kg Zinc 490.0 mg/kg Titanium 1100.0 mg/kg Manganese 1150.0 mg/kg Aluminum 32400.0 mg/kg Iron 38400.0 mg/kg
Update (Dec. 5, 2017): We have changed the source of the installation cost data after being notified by the Department of Defense that they erroneously reported their own cost figures on the DERP website. We are now displaying the costs the department says are the most accurate available, from the Pentagon’s DERP database that we received in a FOIA request.
Note: The risk level of a site refers to a relative risk assessment made by the DOD to prioritize the cleanup of sites.
Data: All data comes from the Defense Environmental Restoration Program and the U.S. Army Corps of Engineers, and will be released soon at the ProPublica Data Store. Read our methodology »