Johnston Atoll Chemical Agent Disposal System

E281065

United States military installation chemical weapons destruction facility

The Johnston Atoll Chemical Agent Disposal System was a U.S. military facility in the Pacific used to safely destroy and dispose of stockpiled chemical weapons.

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All labels observed (1)

Label	Occurrences
Johnston Atoll Chemical Agent Disposal System canonical	2

How this entity was disambiguated

This entity first appeared as the object of triple T2574401 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Johnston Atoll Chemical Agent Disposal System
Context triple: [U.S. Chemical Demilitarization Program, primarySites, Johnston Atoll Chemical Agent Disposal System]

A. Tooele Chemical Agent Disposal Facility
The Tooele Chemical Agent Disposal Facility was a major U.S. Army installation in Utah responsible for safely destroying a large portion of the nation’s stockpile of chemical weapons.
B. Pueblo Chemical Depot
Pueblo Chemical Depot is a U.S. Army installation in Colorado historically used for the storage and destruction of chemical weapons.
C. Albrook Air Force Station
Albrook Air Force Station was a major United States Air Force installation in the former Panama Canal Zone that played a key role in regional air operations and defense.
D. Dugway Proving Ground
Dugway Proving Ground is a large U.S. Army facility in Utah primarily used for testing chemical, biological, radiological, and defense systems in a remote desert environment.
E. Onizuka Air Force Station
Onizuka Air Force Station was a U.S. Air Force installation in California best known for its role in military space operations and for being named in honor of astronaut Ellison Onizuka.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Johnston Atoll Chemical Agent Disposal System
Target entity description: The Johnston Atoll Chemical Agent Disposal System was a U.S. military facility in the Pacific used to safely destroy and dispose of stockpiled chemical weapons.

A. Tooele Chemical Agent Disposal Facility
The Tooele Chemical Agent Disposal Facility was a major U.S. Army installation in Utah responsible for safely destroying a large portion of the nation’s stockpile of chemical weapons.
B. Pueblo Chemical Depot
Pueblo Chemical Depot is a U.S. Army installation in Colorado historically used for the storage and destruction of chemical weapons.
C. Albrook Air Force Station
Albrook Air Force Station was a major United States Air Force installation in the former Panama Canal Zone that played a key role in regional air operations and defense.
D. Dugway Proving Ground
Dugway Proving Ground is a large U.S. Army facility in Utah primarily used for testing chemical, biological, radiological, and defense systems in a remote desert environment.
E. Onizuka Air Force Station
Onizuka Air Force Station was a U.S. Air Force installation in California best known for its role in military space operations and for being named in honor of astronaut Ellison Onizuka.
F. None of above. chosen

Statements (48)

Predicate	Object
instanceOf	United States military installation ⓘ chemical weapons destruction facility ⓘ
constructionStart	late 1980s ⓘ
country	United States of America ⓘ surface form: United States
demolitionDate	early 2000s ⓘ
destroyedChemicalAgent	blister agent H ⓘ blister agent HD (sulfur mustard) ⓘ blister agent HT ⓘ nerve agent GB (sarin) ⓘ VX gas ⓘ surface form: nerve agent VX
destroyedMunitionsType	artillery shells ⓘ bombs ⓘ bulk agent containers ⓘ rockets ⓘ
distanceFromHawaii	approximately 825 miles southwest of Hawaii ⓘ
endDate	2000 ⓘ
environmentalConcern	air emissions ⓘ potential contamination of atoll ecosystem ⓘ
hasComponent	agent processing building ⓘ deactivation furnace system ⓘ liquid incinerator ⓘ metal parts furnace ⓘ pollution abatement system ⓘ
inception	1985 ⓘ
legalBasis	Chemical Weapons Convention ⓘ Public Law 99-145 ⓘ
locatedOn	Johnston Atoll ⓘ surface form: U.S. territory of Johnston Atoll
location	Johnston Atoll ⓘ Pacific Ocean ⓘ
notableFor	first full-scale U.S. chemical weapons incineration facility ⓘ offshore destruction of U.S. chemical weapons stockpile ⓘ
operator	U.S. Army Chemical Materials Activity ⓘ United States Army ⓘ
partOf	U.S. Chemical Demilitarization Program ⓘ surface form: U.S. Army Chemical Stockpile Disposal Program U.S. chemical weapons demilitarization program ⓘ
purpose	destruction of stockpiled chemical weapons ⓘ implementation of U.S. chemical weapons demilitarization program ⓘ safe disposal of chemical munitions ⓘ
safetyFeature	extensive monitoring systems ⓘ multiple incinerator lines ⓘ redundant pollution control systems ⓘ
startDate	1990 ⓘ
status	closed ⓘ
supervisedBy	U.S. Army Chemical Materials Activity ⓘ surface form: U.S. Army Chemical Materials Agency Department of Defense ⓘ surface form: U.S. Department of Defense
usesProcess	high-temperature furnaces ⓘ incineration ⓘ pollution abatement systems ⓘ

How these facts were elicited

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

U.S. Chemical Demilitarization Program → primarySites → Johnston Atoll Chemical Agent Disposal System ⓘ

Johnston Atoll → hostedFacility → Johnston Atoll Chemical Agent Disposal System ⓘ

All labels observed (1)

How this entity was disambiguated Show

Statements (48)

How these facts were elicited Show

Referenced by (2)

How this entity was disambiguated

How these facts were elicited