Locate Methods - On The
Mark Utility Locates
What is
utility locating?
Locating is the art and science of finding
hidden things. So many of these things have
been hidden intentionally for many reasons.
Wires, pipes and tanks are buried out of
sight, below ground or within walls, to keep
us safe from them (and to keep them safe
from us!). This is fine until we want to
find them and no one can remember precisely
where they are.
MAGNETIC SURVEY
The magnetic method measures variations in
magnetic fields. A survey is typically
conducted by measuring the magnetic field
strength at evenly-spaced points (a grid)
over the area of interest.
Applications:
Locate underground storage tanks (UST)
Locate buried drums
Delineate landfill perimeter
Delineate areas of ferromagnetic debris
Locate lost well heads
Line Locating
Inductive or conductive tracing
VIDEO CAMERA INSPECTION
BOREHOLE VIDEO
The inspection of boreholes, well casings
and screens, and provides a permanent video
of the open borehole conditions, fractures,
well screens, casing cracks, etc.
Applications:
Identify layering
Identify aquifers
Thickness of beds
Identify clay-containing layers in
overburden
Assess water quality, flow, and elevation
Assess well completion & screen placement
Inspection of well casing
Identify contaminants
CONFINE SPACE VIDEO
The inspection of confine space locations
such as tanks (UST AST), drainage piping,
rock pit, under slab chimney, storm,
electrical conduit, etc.
Applications:
Identify storage tank size condition
Identify drainage issues
Inspection or rock pit drainage
Identify rock pit or drywell location
Assess under slab inspection of material
compaction failure
Assess chimney soot & creosote build up
Assess utility piping installation practices
Identify utility failure
UNDERWATER VIDEO
The inspection of water reservoirs,
storage tanks, water intakes, water exchange
piping, potable water lines, docks, piles,
etc.
Identify water turbidity during heavy water
transfer in reservoirs
Record time lapse sediment deposits levels
Inspect water intake condition, obstruction,
etc.
Inspect pipe sediment levels, seal
conditions
Record and inspect levels of deterioration
to docks, piles, etc.
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