Transcript Document
CATHODIC PROTECTION SYSTEMS Underground Fuel Tanks & Piping Owner Monitoring & Maintenance Requirements GTEC 2014 Fall Compliance Conference GALVANIC CATHODIC PROTECTION • STiP3 Tanks • Steel Product Lines With Galvanic Anodes • Steel Flex Connectors/Swing Joints GALVANIC CATHODIC PROTECTION • Monitoring Requirements • PEI – Annual Testing • Federal EPA – Every 3 Year Test • Georgia EPD – Every 3 Year Test GALVANIC CATHODIC PROTECTION • An evaluation of the cathodic protection system must be conducted by a certified tester every 3 years. • The tester must be certified by NACE, GTEC or other recognized trade organization. • The owner is responsible for making sure the tester is properly certified. GALVANIC CATHODIC PROTECTION • Field tests must include: • Verification of tank and piping materials • Local and remote potential measurements • Diagram of fueling system • Test results must be presented on the Georgia EPD form GALVANIC CATHODIC PROTECTION • Test results show the tanks and/or piping do not meet criteria, why? • • • • • Poor coating Electrically grounded Tie down straps Type of backfill Poor construction practices GALVANIC CATHODIC PROTECTION • My reports says my tanks are not in compliance, what do I do? • 60 days to repair from date of test • Tester to conduct trouble shooting and/or current requirement tests • Clear ground contact • Add galvanic anodes or impressed current Pavement Lifting Lug Native Soil Tank Galvanic Anode Fill IMPRESSED CURRENT • Monitoring Requirements • Rectifier Monitoring • PEI – Monthly • Federal EPA – 60 Days • Georgia EPD – 60 Days MONTHLY RECTIFIER MONITORING Volts Amps IMPRESSED CURRENT • Monthly Rectifier Monitoring • Record volts and amps on form • Compare output readings to target levels • Take action if readings do not fall within target IMPRESSED CURRENT • Monthly Rectifier Monitoring • No volts or amps • Check breakers and fuse • Volts but no amps • Damaged cables • Fuse blows every time • Lightning damage to diode • 60 days to repair IMPRESSED CURRENT • 3 Year Surveys • Must use certified tester • Tester must do a complete test with remote and local potentials • Results must be issued on Georgia EPD form IMPRESSED CURRENT • 3 Year Survey – Failing Results • • • • • • Tester did not complete test Rectifier needs to be adjusted Cable has been cut Anodes depleted Cable connection to tank is loose Improper original design IMPRESSED CURRENT • 3 Year Test Failure • Repairs must be made in 60 days • Owner needs to be sure repairs are actually required • Owner needs to be involved in repairs, to be sure workmanship is of good quality • Expert must sign off on repairs OWNERS RESPONSIBLITY • Owners must be aware of cathodic protection system monitoring and maintenance requirements • Owners must be aware of the survey results, and take appropriate actions • Owners must be involved in providing quality control on repairs