19 June 2001
5-3.3.1 Developing Inspection Plan. Once the information about the facility
structure and environment has been collected, an inspection plan is developed.
The plan should be based on the inspection objective and the level of inspection
required to meet that objective. It is important to select enough inspection areas
per structural member. The written plan should be similar to a statement of work
(SOW) specifying the sampling criteria, tasks, schedules, equipment to be used,
and any additional responsibilities. The inspection plan must be prepared by a
qualified engineer who is familiar with the structure.
The plan must specify that a qualified diver supervised by a qualified
engineering diver should conduct the underwater inspections and an experienced
engineer must perform the structural assessment of the entire pier.
Equipment and Tools
5-3.4.1 Surface Cleaning Tools. To perform a Level II and Level III
inspection, the marine growth on the structure must be removed. How this is
done depends on the surface support available. For small sample areas, wire
brushes, probes, and scrapers may be adequate. For larger areas or more
detailed inspections underwater, a hydraulic grinder with barnacle buster
attachment, or high-pressure water jet gun, may be used. Take care to prevent
damage to pile wraps or coatings and to the preservative-treated layers of timber
or deteriorating surfaces of concrete.
Inspection Tools. Inspection tools and equipment include:
5-220.127.116.11 Hand-Held Tools.
Portable flashlight, ruler, and tape measure for documenting areas
Small or large hammers or pick-axes for performing soundings of
the structural member
Calipers and scales for determining thickness of steel flanges,
Increment borer and T-handles for extracting core samples from
Chipping tools for prodding the surface of the concrete to determine
5-18.104.22.168 Mechanical Devices. Mechanical devices including a Schmidt test
hammer for measuring concrete surface hardness and rotary coring equipment
for taking core samples from concrete structures.
5-22.214.171.124 Electrical Equipment. This includes electrical equipment, such as an
underwater voltmeter for determining the level of cathodic protection on steel