Defense Threat Reduction Agency
Defense Threat Reduction Agency's Categorical Exclusions (opens in new tab)Categorical Exclusion
Defense Threat Reduction Agency (DTRA)
Exclusion Text
7. Sampling, borehole drilling, well drilling and installation, analytical testing, site preparation, and minimally intrusive physical testing. These activities could involve minor clearing, grubbing, or movement of heavy equipment such as drill rigs. If any of these actions result in proposals for further actions, those proposals must be considered by an appropriate CATEX or NEPA analysis. Examples include, but are not limited to: Sampling for asbestos-containing materials, polychlorinated biphenyls, and lead-based paint. Topographical surveys and surveys for unexploded ordnance. Minimally-intrusive (no more than 25 square feet of disturbed surface area) geological, geophysical surveys, geo-technical activities, and seismic studies. Minimally-intrusive sampling to determine if hazardous wastes, contaminants, pollutants, or special hazards are present. Ground water monitoring wells, subsurface soil sampling, and soil borings.
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This CE Explorer tool is not an authoritative source and creates no rights or obligations. When using the CE Explorer Tool, Federal agencies and stakeholders should review the relevant agency's NEPA procedures for information about how to apply the CE, including any limitations or potential extraordinary circumstances, and to ensure that a CE is current and applicable to a given proposed action. For ease of use, a link to each agency's NEPA procedures and CEs is provided along with the text of the CE. To adopt and use another agency's categorical exclusion, an agency must follow the steps described in section 109 of NEPA, 42 U.S.C. 4336c.
