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6. Cap openings on all tanks before removing ,,t��}n3�s from site. <br /> a) Nitrogen - tank rust be capped to maintain nitrogen <br /> blanket. <br /> b) Carbon dioxide gas - tank must be cappgd to maintain _g $ <br /> blanket. [yq <br /> c) The use of dry ice requires a veQ.ti,hole fpr pressurp, ,v; y <br /> relief. <br /> 1) Vent cap will have 1/8 inch opening on top: ' <br /> 7 . Empty underground tanks, if not properly cleaned, are <br /> considered hazardous waste. Requirements for,,ha�dlinq,; <br /> 1'f <br /> a) Must be hauled to a certified hazardous waste site. <br /> b) Truck must be certified to haul hazardous waste. <br /> c) Must be able to present a hazardous waste manifest before <br /> leaving the site. <br /> S . Equipment to hoist tank must be rated for the calculated <br /> load: <br /> a) Equipment must not be strained. <br /> b) Tanks are not to be dragged. <br /> Note: Job will be halted if these criteria are not 'met. <br /> c) Load tank on carrier with pressure relief hole directed <br /> upward and all caps in place. <br /> (t, <br /> Definition: <br /> O - Oxygen concentration in air <br /> LEL - Lower explosive limit in air, <br /> UEL - Upper explosive limit in air. <br /> Product (%) LEL M UEL <br /> Gasoline 1. 3 8 . 2 <br /> Diesel 0 . 6 7 . 5 <br /> Waste Oil 9 . 0 N/A o- <br /> Methanol 6. 0 36.5 <br /> Comp. Nat. Gas 3 . 8 17 . 0 <br /> Propane (LPG) 2 . 4 J 9 . 5 <br /> Liquid Asphalt 9 . 0 N/A <br />