REMEDIAL ACTION WORK PLAN OPERABLE UNIT 2, LANDFILL ...

— ● The UXO specialist will be equipped with a Schonstedt magnetometer, wooden stakes, a hammer
to drive the stakes, and brightly colored flagging or caution tape.
● The UXO specialist will lead the field party from the nearest area known to be free of UXO to the
sampling site. The UXO specialist will use the magnetometer to survey the pathway and locate
potential hazards and the sampling party will be responsible for following directly behind the UXO
specialist. Any potential hazards located will be marked by surrounding it with four wooden
stakes and encircling the stakes with flagging or caution tape. The UXO specialist will direct the
sampling party around the potential hazard.
● If there is a need to repetitively visit a sampling location that is currently inactive (i.e., the area
is not an active firing range and there is no chance of new UXO appearing) the UXO specialist
will mark the boundaries of the cleared pathway by placing wooden stakes along the edge of the
cleared pathway at 25’ intervals. The stakes will then be connected with flagging or caution tape
to create an obvious line of demarcation between the area that is safe to traverse and the area
that has not been checked. The sampling team will be able to make unescorted repetitive visits
to the site as long as the stakes and flagging tape remain in good condition and are not tampered
with.
Downhole UXO Inspection
The purpose of downhole UXO inspection is to locate UXO or other ferrous metal objects prior to them
being impacted by a drilling or boring rig. Downhole UXO inspection is like UXO safety escort in the
respect that the objective is to avoid hazards and there is no attempt to locate UXO or to perform
intrusive UXO operations. The two-man rule, therefore, also does not apply and downhole UXO
inspection can be petiormed by a single UXO specialist.
The following procedures apply to downhole UXO inspection:
The UXO specialist will be equipped with a Foerster Ferex Ordnance Locator and a Schonstedt
magnetometer.
The Schonstedt magnetometer will be used to ensure that a clear pathway exists to allow the drill
rig to travel to the drilling site. This is essentially an escort operation for the drill rig and the
procedures for UXO escort services will be followed. Areas suspected to contain UXO or other
hazards will be avoided by finding an alternative route that is free of UXO.
Prior to the arrival of the drill rig the actual drilling site will be inspected with the Foerster Ferex
Ordnance Locator. If subsurface ferrous metal anomalies are detected at the drilling site an
alternate drilling site will be chosen.
The drilling process must be stopped every two feet to enable the UXO specialist to inspect the
next two feet for the presence of ferrous anomalies using the Foerster Ferex Ordnance Locator.
During the inspection the drill rig may have to be driven away from the drilling site to prevent the
large ferrous signature of the rig from interfering with the inspection and possibly masking an
anomaly.
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