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6. Cap openings on all tanks before removin9 ,t-4"s ,from site. . <br /> a) Nitrogen - tank must be capped to maintain nitrogen <br /> blanket. <br /> b) Carbon dioxide gas - tank must be eappgd to maintainr.rca <br /> blanket. <br /> . c) The use of dry ice requires a vett.,.f oie,-,fpr pres6�,_�8-,J V;. ,; <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- haj�dlin <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 /> 8. Equipment to hoist tank must be rated for the calculated <br /> load: <br /> a) Equipment must not be strained, ,y <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 /> Definition: <br /> O ' - Oxygen concentration in air <br /> LEL - Lower explosive limit in air, <br /> UEL - Upper explosive limit in air. <br /> Product, ' (t) LEL _! L UEL <br /> Gasoline 1. 3 8 . 2 <br /> Diesel 0 . 6 7 . 5 <br /> Waste Oil 9 . 0 N/A <br /> Methanol 6 . 0 36.5 <br /> Comp. 'Nat. Gas 3 . 8 17 . 0 M « <br /> Propane (LPG) 2 . 4 9 . 5 <br /> Liquid Asphalt 9 . 0 N/A <br />