EP 1110-1-18
24 Apr 00
(2) Sandbags. Sandbags may be used for an OE item no larger than 155-mm. If sandbags
are proposed to be used as an engineering control to mitigate the fragmentation and overpressures
generated during an intentional OE detonation, the project team should refer to HNC-ED-CS-S-
98-7, Use of Sandbags for Mitigation of Fragmentation and Explosion effects Due to Intentional
Detonation of Munitions.
(3) On-Site Ordnance Demolition Container (ODC). Another engineering control that may
be proposed for the intentional detonation of OE items is the ODC. The ODC has been approved
by DDESB for the intentional detonation of OE items. The ODC is designed to contain all
significant explosion pressures for a total NEW of up to 6 pounds of TNT or its equivalent. The
ODC is designed to capture all fragmentation from OE items with fragmentation characteristics
up to those from an 81-mm mortar. When using the ODC, the required withdrawal distance is 75
feet. Detailed design drawings for the ODC and the supporting technical report, CEHNC-ED-
CS-S-97-3, Safety Submission for On-Site Demolition Container for Unexploded Ordnance are
available.
c. If engineering controls are required for intentional detonations, the OE Design Center
should be contacted to arrange for the preparation of a design with USAESCH's Engineering
Directorate, Structural Branch.
21-3. Geophysical Considerations. This section presents an overview of geophysical
considerations for OE response projects. Detailed requirements for geophysical investigations
during OE response projects are available from the OE MCX.
a. Types of OE Detectors. The most successful geophysical systems used as OE detectors
rely on one of two technologies: magnetometry or electromagnetics. Magnetometers are limited
to detecting ferrous items. Electromagnetic detectors can detect any conductive metal. Another
method used for subsurface detection of munitions is ground penetrating radar. Other systems
may be used as they are advanced.
b. Instrument Selection. To select the most appropriate OE detection instrument for a
geophysical investigation, the following factors should be considered: site characteristics;
ordnance penetration; instrument detection rates; and instrument performance during testing on a
sample grid.
(1) Site Characteristics. Prior to selecting an OE detection instrument, the unique
characteristics of the site should be evaluated. Features of the site which may impact an OE
detection instrument include:
(a) Terrain and vegetation.
(b) Geologic conditions.
21-2
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