An Environmental Assessment (EA) contains an estimate of whether or not a proposed system will adversely affect the environment or be environmentally controversial. It’s a document for which a Federal agency is responsible that serves to:
- Identify possible environmental effects.
- Propose measurements to mitigate adverse effects.
- Briefly provide sufficient evidence and analysis for determining whether to prepare an Environmental Impact Statement (EIS) or a finding of no significant impact.
- Aid an agency’s compliance laws and regulations when no EIS is necessary.
- Facilitate preparation of an EIS when one is necessary.
Environmental Impact Statement (EIS)
If an Environmental Assessment finds significant impacts to the environment, a EIS is prepared. An EIS provides a detailed description of the effects, impacts, or consequences associated with designing, manufacturing, testing, operating, maintaining, and disposing of weapon or Automated Information System (AIS) systems. The purpose of the assessment is to ensure that decision makers consider the ensuing environmental impacts when deciding whether to proceed with a project.
Environmental, Safety and Occupation Health (ESOH)
The ESOH section of the Acquisition Strategy should address the anticipated type of National Environmental Policy Act (NEPA) / Executive Order (EO) 12114 document (e.g., Categorical Exclusion, Environmental Assessment and Finding of No Significant Impact, Environmental Impact Statement, Record of Decision, Overseas Environmental Assessment, and Overseas Environmental Impact Statement) which the proponent should complete prior to the proposed action start date. 
Executive Order (EO) 12114
EO 12114 provides the exclusive and complete requirement for taking account of considerations with respect to actions that do significant harm to the environment of places outside the United States. This part provides policy and procedures to enable Department of Defense (DoD) officials to be informed and take account of environmental considerations when authorizing or approving certain major Federal actions that do significant harm to the environment of places outside the United States. Its sole objective is to establish internal procedures to achieve this purpose, and nothing in it shall be construed to create a cause of action.