COMPLIANCE INFO_2010-2011 - Laserfiche WebLink

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INTRODUCTION Chapter B specifies internal inspection and assessment procedures to meet the requirements of Federal Regulation 40 CFR Part 280.21 (b) (1) (ii) which requires that within 10 years after lining, and every 5 years thereafter, that lined tanks without cathodic protection be internally inspected. If a cathodic protection system is installed to a lined tank in accordance with section 40 CFR 280.2 1(b)(3) within 10 years of lining,no future internal inspections are required. For specific criteria for the addition of cathodic protection to underground storage tank systems, information is available in the following publications: API RP 1632, "Cathodic Protection of Underground Petroleum Storage Tanks and Piping Systems" and NAGE RP-02-85-92, "Corrosion Control of Underground Storage Tank Systems. Pages 37131,37132,and 37139 of the Federal Register stated the following: 1) "Comments were also received that indicate the addition of a cathodic protection system to a tank that was repaired by lining was not necessary and represented a significant additional expense. In view of the excellent performance record to date with relined tanks,EPA agrees" 2) 'Data submitted by the commenters and data developed by EPA since the proposal indicate that lined tanks rarely cause releases to the environment,even in the absence of external corrosion measures" 3) "The EPA will allow lining alone as an upgrade alternative" 4) "To use this technique as the sole method for meeting the corrosion protection upgrade,the tank must be internally inspected after 10 years and 5 years thereafter. The inspection must be conducted in accordance with a code or practice developed by a nationally recognized association or independent testing laboratory." 5) "Currently available data submitted and developed independently by EPA concerning field performance of tank lining indicate that if these codes (NLPA 631 or API 1631) are followed, the lined tank will perform very well."