[Code of Federal Regulations]
[Title 40, Volume 24]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR280.31]

[Page 461]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
                           AGENCY (CONTINUED)
 
PART 280--TECHNICAL STANDARDS AND CORRECTIVE ACTION REQUIREMENTS FOR OWNERS AND OPERATORS OF UNDERGROUND STORAGE TANKS (UST)--Table of Contents
 
                Subpart C--General Operating Requirements
 
Sec. 280.31  Operation and maintenance of corrosion protection.

    All owners and operators of steel UST systems with corrosion 
protection must comply with the following requirements to ensure that 
releases due to corrosion are prevented for as long as the UST system is 
used to store regulated substances:
    (a) All corrosion protection systems must be operated and maintained 
to continuously provide corrosion protection to the metal components of 
that portion of the tank and piping that routinely contain regulated 
substances and are in contact with the ground.
    (b) All UST systems equipped with cathodic protection systems must 
be inspected for proper operation by a qualified cathodic protection 
tester in accordance with the following requirements:
    (1) Frequency. All cathodic protection systems must be tested within 
6 months of installation and at least every 3 years thereafter or 
according to another reasonable time frame established by the 
implementing agency; and
    (2) Inspection criteria. The criteria that are used to determine 
that cathodic protection is adequate as required by this section must be 
in accordance with a code of practice developed by a nationally 
recognized association.
    Note: National Association of Corrosion Engineers Standard RP-02-85, 
``Control of External Corrosion on Metallic Buried, Partially Buried, or 
Submerged Liquid Storage Systems,'' may be used to comply with paragraph 
(b)(2) of this section.
    (c) UST systems with impressed current cathodic protection systems 
must also be inspected every 60 days to ensure the equipment is running 
properly.
    (d) For UST systems using cathodic protection, records of the 
operation of the cathodic protection must be maintained (in accordance 
with Sec. 280.34) to demonstrate compliance with the performance 
standards in this section. These records must provide the following:
    (1) The results of the last three inspections required in paragraph 
(c) of this section; and
    (2) The results of testing from the last two inspections required in 
paragraph (b) of this section.