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Industry Standard Requirements for Tank Inspection Frequency For the sake of consistency,the standard for testing bequency for Convauk foe'and oil containment systems should he consistent with the requirements ofIT13P001 which is detailed below and is nomrallya krncbon of the size of The tank and its Category per SP001 Standard Tank Categories The tank categories and inspection schedule hour SP001 are to be utilized for ConVault tanks. Among other factors,owners should take a number of aspects into consideration such as The tank leak detection system,and that the monitoring equipment is in good working condition. 3ased on many considerations,the SP001 standard Classifies tanks into three categories.Depending on The risk a tank System poses to the environment if kept in service R Is ranked as a category 1,2 or 3 tank.Category 1 tanks pose the least amount of risk and category 3 the highest. Sec Table 5.4 of the standard, reproduced here,for examples of tank configuration and ASTeategury. Please note that if the ASI bottom plate,other than its legs or supports,is In contact with the ground or a concrete slah,it is prone to corrosion and increased susceptibility to leakage. Shap Fabricated Tanks in contact with the ground or a mncrete base are almost always vertical tanks. Such tanks are placed in Category 2 or 3.ASTs which are elevated, have a (Calk detection system,have spill control and have no part ofthe tank in contact with the grouse (otherthan legs or supports)are classified as category I tanks. Table 5.4:Example Tank Configurations and AST Category Tank Configuration Tank has CRDM AST Category AST in contort ith ground No tor? ConVoult— aeyatedtank w/spiilicuntrol&no partofAST in mntactw/ground Yes 1 Verticaltankw/RPD&spill control Yes _ 1 Verfoltankw/double botmm&spin control Yes 1 Double-wal AST Yes 1 ASTw/secondary cwrtainmehtdikePoerm Yes 1 CRDM:Continuous Release Detection Method–orLeakoevection System RP2 Release Prevention flamer Inspection Type and Frequency The SP0007 standard requires different inspection types and different Inspection Intervals based on the tank size, lank category,and the risk it poses. the tank inspection intervals from SP001 are to be followed for ConVault tanks. In Table 55 of SP0001 (see next page),those portions pertaining to shop fabricated tanks up to 30,000 gallons have been highlighted showing inspection schedules for the different AST categories. 8989653227 corrvaultcmn