RP0388-2001
NACE International 9
deteriorated, wiring shall be replaced. It is
important that all wiring and connections to
reference electrodes be completely insulated.
8.4 Records
8.4.1 Tank Information
8.4.1.1 Complete information and history of the
tank itself should be recorded, including:
(a) Dimensions, configuration, and capacity,
(b) Tank contractor,
(c) Date of erection,
(d) Materials of construction,
(e) Original coating, including system, surface
preparation, and materials,
(f) Subsequent coatings and dates of coating,
(g) History of any structural repairs,
(h) Costs associated with erection and
maintenance of the tank,
(i) Tank location, and
(j) Warranty dates on coatings and cathodic
protection.
8.4.2 Water Information
8.4.2.1 Complete information about the water
stored in the tank should be recorded. This
information should include both the chemical and
electrical characteristics as well as information
about variations in these characteristics that occur
throughout the year as a result of natural causes,
disinfection, and water treatment.
8.4.2.2 Operational information about frequency
of draining, cleaning, and filling should be
recorded.
8.4.3 Cathodic Protection System
8.4.3.1 Complete information about the
installation and design should be recorded,
including:
(a) Power source capacity, both AC and DC,
(b) Number and configuration of impressed
current anodes,
(c) Impressed current anode material and design
life,
(d) Wiring and anode suspension,
(e) Electrical schematic diagrams, and
(f) Date of energizing and initial current and
voltage settings.
8.4.3.2 Maintenance records should be kept,
including:
(a) Tabulation of monthly measurements of
impressed current voltage and current of the
power source and tank-to-water potentials. Water
surface elevations at the time of testing should
also be recorded.
(b) Reports of annual inspections.
(c) All repairs and additions.
(d) The cost of all maintenance, including
coating, cathodic protection inspection, etc.
________________________________________________________________________
References
1. NACE Standard RP0196 (latest revision), “Galvanic
Anode Cathodic Protection of Internal Submerged Surfaces
of Steel Water Storage Tanks” (Houston, TX: NACE).
2. NSF-61 (latest revision), “Drinking Water System
Components” (Ann Arbor, MI: NSF International).
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