Environmental Engineering Reference
In-Depth Information
Chapter 6
Underwater Inspection of Storage
Facilities—Disinfection Procedures
Storage facilities can be inspected by divers or remote oper-
ated vehicles (ROV) while the facility is filled with potable water.
This procedure must be conducted by trained and certified per-
sonnel. Great care should be used to ensure that the potable
water contained in the facility is not contaminated. The proce-
dures described here and in
ANSI/AWWA C652 Standard for
Disinfection of Water-Storage Facilities
include the minimum
requirements. Contractors and owners may employ additional
procedures to increase the safety and effectiveness of these pro-
cedures. Underwater inspection of a potable water storage facil-
ity may be prohibited by regulatory agencies in some locations.
Applicable regulatory agencies should be contacted to determine
their requirements before beginning this procedure.
In most cases, underwater inspection is performed by contrac-
tors to the utility. Therefore, this chapter is written as if a con-
tractor is employed for this purpose. Some utilities have the
trained personnel and equipment to perform this procedure. In
this case, the utility employees would act as a contractor and the
reader can make that substitution where it is appropriate.
Preliminary Meeting
A meeting should be held involving all parties to ensure that
everyone understands the issues and that clear lines of commu-
nication are established. Some topics to discuss include:
•
Configuration of the reservoir
Disinfection procedures
Identification of appurtenances that may be encountered
Timing and time restrictions
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