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Periodic Inspection Requirements ConVault tanks of 5,000 gallons or less capacity are CATEGORY 1 TANKS. Owners of ConVault ASTs of this size are NOT required to employ Certined AST Inspectors to inspect their tanks to comply with the standard's requirements,but can be in compliance with the standard by inspecting the tanks themselves or having their employees inspect them.ConVault tanks larger than 5000 gallons,are also self inspected and only require inspection by a Certified Inspector after 20 years of service. What qualifications are required for the owner to self-inspecthis tank,andhowdoes the ownerneed to know what to inspect? Section 4 of the SP001 standard defines the qualifications of the Owner's Inspector as follows:"Periodic inspections are to be performed byan owner's inspector.The personnel performing these inspections shall be knowledgeable ofstoroge facility operations, the type ofAST and its associated components,and characteristics of the liquid stored° Section 6 of the standard STI SP001 explains what is meant by the PERIODIC AST INSPECTION — and what needs to be inspected and kept in the owner's AST records.These are simple and straight-forward tasks which can be performed by any competent owner or his employees.The standard makes it very easy to know what to do and what to check for by providing a check list in the standard's Appendix C.The first section requires filling in information about the owner and the ID of the l tank.The second section is the SP001 Monthly Inspection Checklist which consists of 9 easy to check,Yes or No questions such as, is there water in primary or secondary containment, are there visible signs of leakage around the tank, concrete pad,or ground,are all tank openings properly sealed,etc.The third section is the SP001 Annual Inspection Checklist which contains 27 questions with Yes or No answers and a space for comments, It should be noted that the Periodic Inspection must be performed in addition to the formal External Inspections. Simply put,the periodic inspection requirements are visual,documented inspections conducted by an owner's inspector,to assess the general AST conditions,as best as possible,without suspending AST'operations or removing the ASTfrom service. ConVault strongly encourages the use of the Monthly and Annual Inspection Checklists provided in SP001, and, in fact, requires some of these items be checked on a weekly basis as part of the ConVault warranty. See Pages 10-12 for a Con Vault specific Maintenance Checklist, A copy of ConVault's weekly/monthly/yearly checklist is available online at http-://www.convault.com/pdfdoc/checklist.pdf. i i l