EP 1110-1-18
24 Apr 00
c. OE Detection Instrument Testing. OE detection instruments should be field tested prior
to each project to ensure their applicability to the unique geographical characteristics of the site.
If the RECON task is included in the EE/CA process, the OE detection instrument with the best
documented performance for reasonable cost should be selected for the EE/CA field
investigation. If the RECON task was not included in the EE/CA process, then the A-E should
complete OE detection instrument testing as part of the initial field effort. The procedures for
OE detection instrument testing are described in Chapter 21.
d. Area Preparation. Area preparation includes the identification and marking of
geophysical sampling grids and the removal of sufficient vegetation and other obstacles which
may restrict sampling efforts.
(1) Location Surveys and Mapping. Location surveys and mapping will be performed by
the A-E to establish the boundaries of the areas under investigation. The procedures to be used
in the execution of location surveys and mapping are discussed in Chapter 21.
(2) Brush Clearance.
(a) Prior to conducting any field sampling, brush clearance may be required. The purpose
of brush clearance is to remove sufficient vegetative growth from the areas to be investigated in
order to effectively locate, investigate, and remove subsurface anomalies.
(b) The vegetation removal techniques used must be coordinated with the district
environmental staff and documented in the Work Plan. A UXO Technician II must always escort
the brush clearing crew in areas not previously cleared of OE. The safety requirements listed in
EM 385-1-1 must be followed. Personal Protective Equipment (PPE) will be provided to the
brush clearance crew and used as required for protection. All brush clearance personnel must be
trained in the safe operation of the equipment and have obtained site-specific safety training in
accordance with Chapter 24.
e. Field Sampling. During the field sampling task, surface and subsurface sampling are
conducted to obtain the data necessary to conduct an accurate EE/CA investigation.
(1) Surface Sampling. Surface sampling is conducted by UXO personnel. The UXO
personnel will visually inspect the site investigation area; identify grids; mark any located UXO;
and record UXO type, location, density, and level of hazard.
(2) Subsurface Sampling.
(a) Prior to the subsurface sampling effort, the A-E will perform a geophysical survey to
locate subsurface anomalies. The procedures for conducting OE detection surveys are discussed
in Chapter 21. OE or suspected OE identified by the OE sampling protocol will be intrusively
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