EP 1110-1-18
24 Apr 00
(6) DA Pam 40-8, Occupational Health Guidelines for the Evaluation and Control of
Occupational Exposure to Nerve Agents GA, GB, GD, and VX.
b. The probability of encountering CWM during proposed CWM response activities will
be ranked in accordance with AR 385-10 into one of five categories prior to initiating on-site
activities: frequent, probable, occasional, remote, or improbable.
(1) If the probability is categorized as improbable or remote, the district Commander or
designated representative may assume the risk of conducting site activities as a non-CWM site.
(2) If the probability is categorized as occasional, probable, or frequent, the response action
must be conducted. Contact the OE MCX for the procedures to be used.
18-4. Coordination. If the presence of CWM is suspected at a site, the district must coordinate
with USAESCH prior to beginning any on-site activities.
18-5. Risk Assessment. Any activity on a non-stockpile CWM response project will require
determination of risk to the public and site workers. Risks to human health and the environment
as a result of an explosion or release of chemical agent are the primary factors in determining the
effectiveness of risk management decisions concerning non-stockpile CWM. A site-specific
maximum credible event (MCE) will be developed to form a basis to generate hazard zones.
Contact the OE MCX for procedures for calculating the MCE. Hazard zones will be computed
using the MCE and Army approved atmospheric dispersion modeling. Quantitative RACs will
also be developed to assess response hazards (e.g., dispersion of agent-contaminated soil, and
explosive hazards). Public risk information and controls will be addressed in safety planning
documents.
18-6. Non-stockpile Chemical Warfare Materiel Planned Response Activities.
a. Non-stockpile CWM planned response activities will be conducted to protect public
and worker health and the environment in accordance with applicable statutes and implementing
regulations. Safety planning and coordination with EPA, state and civil authorities, as
appropriate, will be priorities.
b. Prior to initiation of any planned response activities, including site investigation,
approved SSHPs and procedures are required. The need for an ARB should also be considered in
accordance with the guidance provided in Appendix E.
c. For investigative and assessment activities (e.g., soil and water sampling, geophysical
analysis, installation of monitoring wells when anomaly avoidance techniques are used, etc.),
SSHPs approved by USAESCH are required. For removal activities (e.g., surface removal of
non-stockpile CWM or excavations when the intent is to uncover, characterize, and remove
geophysical anomalies), safety submissions must be prepared by the agency with overall project
18-2
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