Cathodic Protection Testing
All tanks equipped with a cathodic protection system must be monitored to assure proper installation and ensuing cathodic protection of the tank. The cathodic anode test performed is in accordance with local, state, and federal regulations. This test may be necessary to comply with local regulations, or certain tank warranty requirements. Test results are limited to the conditions existing at the time of the inspection only and does not exclude the possibility of a past, present, or future problem. A cathodic anode test reading level of -850 millivolts (-0.85 volts) or more negative must be obtained to indicate that the tank is protected from corrosion. Please reference the National Association of Corrosion Engineers' Recommended Practice of Corrosion Control for Underground Storage Tank Systems, RP-02-85, for additional information and cathodic protection criteria. If the test reading level is more negative than -1.800 volts, you should contact the Steel Tank Institute or your local STI-P3® tank supplier.
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