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State Water Resources Control Board Page 5 of 6 <br /> 0 <br /> a.Steel or clad tanks <br /> i.sandblast to white metal <br /> ii.ultrasound thickness test of steel walls by appropriately trained person <br /> iii.count number of holes,splits,perforations,and other defects <br /> b. Fiberglass tanks <br /> i.interior walls cleaned by wipe down <br /> ii.interior diameter measurements <br /> iii.visual check for structural,tension,or compression problems <br /> 7.Is the special inspector an appropriate registered professional engineer? <br /> 8.Holes and splits in steel tanks,if any,plugged with self-tapping bolts,boiler plugs,water-tight,hydraulic cement,or welding. <br /> 9.Striker plates installed beneath all tank openings that could be used for manual dipsticking. <br /> 10.Lining applied within 8 hours of sandblasting? <br /> 11.Berfore UST is returned to service,certification by coatings expert or special inspector that tank was lined properly: <br /> a.Steel or clad tanks <br /> i.visual check of lining <br /> ii.thickness test of lining <br /> iii.hardness test of lining <br /> iv.electrical resistance holiday detector test <br /> v.vacuum test <br /> b. Fiberglass tanks <br /> i.visual check of lining <br /> ii.thickness test of lining <br /> iii. hardness test of lining <br /> iv.vacuum test(not required if submerged by 50%of depth in ground water) <br /> 12.If a coatings expert was used,is he financially independent from the tank owner and lining company? <br /> 13.Tank integrity test conducted. <br /> 14.Continuous vapor or ground water monitoring system(tanks that have leaked only). <br /> 15.Tank lining records and test results maintained for remaining operating life of tank. <br /> 16.Spill container. <br /> 17.Overfill prevention equipment. <br /> 18.Proposed monitoring procedures for the tank(s)and piping that will be used once the UST is put back into service. <br /> 19.An emergency response plan for the facility that will be used once the UST(s)is put back into service. <br /> 20.Ten years after lining and every five years thereafter,certification by coatings expert or special inspector that the tank is suitable for <br /> continued use: <br /> a.Steel or clad tanks <br /> i.interior lining cleaned by wipe down <br /> ii.visual check of lining <br /> iii.thickness test of lining <br /> iv.hardness test of lining <br /> v.electrical resistance holiday detector test <br /> vi.ultrasound thickness test of steel walls by appropriately trained person <br /> vii.vacuum test <br /> b. Fiberglass tanks <br /> i.interior lining cleaned by wipe down <br /> ii.visual check of lining <br /> iii.thickness test of lining <br /> iv.hardness test of lining <br /> http://www.waterboards.ca.gov/water—issues/Programs/ust/leak prevention/Igs/136_1.shtml 2/17/2010 <br />