EP 1110-1-18
24 Apr 00
CHAPTER 21
ENGINEERING CONSIDERATIONS
21-1. Introduction. This chapter provides guidance on three important engineering
considerations for OE response actions: the use of engineering controls, the selection and
application of geophysical instrumentation, and location surveying and mapping.
21-2. Engineering Controls. Engineering controls can be used to mitigate the effects of
accidental or intentional explosions if the calculated exclusion zone for the OE items to be
destroyed cannot be met. Engineering controls are used to improve personnel safety and/or to
reduce the exclusion zone during removal operations. The types of engineering controls include
those used for unintentional explosions and those used for intentional explosions.
a. Engineering Controls for Unintentional Detonation.
(1) An unintentional detonation occurs when the location of the detonation cannot be
planned in advance. An unintentional detonation includes a detonation during excavation of a
suspected OE item or a detonation in the interim holding area or collection point. An example of
an engineering control commonly used for unintentional detonations is the barricade.
(2) The project team should design barricades in accordance with approved DOD
standards. To implement a barricade that has previous approval by DDESB, the project team
should contact USAESCH's Engineering Directorate, Structural Branch. If a barricade has not
been previously approved, a complete structural design package should be submitted to
USAESCH's Engineering Directorate, Structural Branch as part of the ESS. The structural
design package should include design drawings, design details, calculations, drawings, and
relevant testing details. The design must show how fragmentation is captured and overpressure
is reduced. The design package, as part of the ESS, is forwarded to DDESB for approval.
b. Engineering Controls for Intentional Detonations. An intentional detonation is a
planned, controlled detonation. Intentional detonations include blow-in-place, consolidated shots
(detonation of multiple items), and open detonation/open burn areas. Engineering controls used
for intentional detonations include soil cover, sandbags, and the On-Site Demolition Container.
(1) Soil Cover. If soil is proposed to be used over a to-be-detonated OE, the project team
may use one of several computerized models to determine the required thickness of soil cover
necessary for the intentional detonation of OE items. The Buried Explosion Module is one such
computerized model. The methodology used in this software is documented in HNC-ED-CS-S-
97-7-Revision 1. The use of soil as an engineering control reduces the fragment and soil ejecta
distances.
21-1
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