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covered at all times except to add or remove wastes and store liquid waste <br /> containers on secondary containment pallets . <br /> Tank Storage <br /> If hazardous waste is accumulated in aboveground storage tanks (ASTs) , FACILITY <br /> NAME must ensure : <br /> ➢ Hazardous waste must not be stored in the tank for more than 90 (LQG) or <br /> 180 days (SQG) . <br /> ➢ Tanks must be designed to hold hazardous waste and not collapse or leak . <br /> ➢ Closed tanks must be in good condition and compatible with the waste . <br /> ➢ Each AST in which hazardous waste is accumulated must be labeled with the <br /> following information : <br /> o The words " Hazardous Waste" <br /> o Accumulation start date <br /> o Composition and physical state of the waste (liquid, solid or gas) <br /> o Hazardous properties of the waste (e . g ., reactive or ignitable) <br /> o Name, address, and EPA identification number of the generator/ facility <br /> o No smoking signs must be conspicuously displayed where ignitable or <br /> reactive wastes are stored in tanks <br /> ➢ Inspections : <br /> o LQGs : <br /> ■ Above ground portions of the tank system and construction materials <br /> of the tank and in the area immediately surrounding the tanks (e . g . , <br /> dikes) must be checked at least daily to detect corrosion or leaking <br /> finless leak detection systems are installed . If such systems are <br /> installed, Construction materials of the tank and in the area <br /> immediately surrounding the tanks (e . g . , dikes) must be checked at <br /> least weekly. <br /> ■ Data must beg athered from monitoring equipment at least once each <br /> operating day to ensure that the tank is being operated according the <br /> its design <br /> ■ Secondary containment systems must be inspected at least once each <br /> operating day <br /> o SQGs : <br /> 7of13 <br />