EP 1110-1-18
24 Apr 00
operations under the Atomic Energy Act of 1954, as amended, have been completed. (40 CFR
260.10)
Most Probable Event (MPE)
The most likely event, as a result of an accidental, unplanned, or unintended detonation of an
item of ordnance, that could occur during OE activities. The event must be realistic with
reasonable probability of occurrence.
National Oil and Hazardous Substance Pollution Contingency Plan (NCP)
Revised in 1990, the NCP provides the regulatory framework for responses under CERCLA.
The NCP designates the Department of Defense as the removal response authority for ordnance
and explosives hazards.
Non-Stockpile Chemical Warfare Materiel
CWM (see definition) that is not included in the chemical stockpile. Non-stockpile CWM is
divided into five categories: buried CWM, recovered chemical weapons (items recovered during
range clearing operations, from chemical burial sites, and from research and development
testing), former chemical weapon production facilities, binary chemical weapons, and
miscellaneous CWM (unfilled munitions and devices and equipment specially designed for use
directly in connection with employment of chemical weapons). (HQDA Interim Guidance for
Biological Warfare Materiel (BWM) and Non-stockpile Chemical Warfare Materiel (CWM)
Response Activities)
Non-Time Critical Removal Action (NTCRA)
NTCRAs are actions initiated in response to a release or threat of a release that poses a risk to
human health, its welfare, or the environment. Initiation of removal cleanup actions may be
delayed for six months or more.
Ordnance and Explosives (OE)
OE consists of either (1) or (2) below:
(1) Ammunition, ammunition components, chemical or biological warfare materiel or explosives
that have been abandoned, expelled from demolition pits or burning pads, lost, discarded, buried,
or fired. Such ammunition, ammunition components, and explosives are no longer under
accountable record control of any DOD organization or activity. (HQDA Policy Memorandum
"Explosives Safety Policy for Real Property Containing Conventional OE")
(2) Explosive Soil. See definition under "Explosive Soil." (ER 1110-1-8153)
OE Project Team
The OE Project Team consists of the customer(s), the PM, and multi-disciplined representatives
from the technical/functional elements necessary to execute the project.
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