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6. Cap openings on all tanks before remov <br />s. from site.. <br />_ Aq <br />a) Nitrogen - tank must be capped to maintain nitrogen <br />blanket. <br />b) Carbon dioxide gas -tank must be <br />blanketcappgd to maintain -gas <br />c) TThhe useef. of dry ice requires a veil. ,,holed !pr press uz -7yV° <br />1) ' 'Vent cap will have 1/8 inch opening on <br />7. Empty underground tanks, if not properly cleaned, are <br />considered hazardous waste. Requirements for handling; <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. •:r <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 />Defini ion• <br />0 Oxygen concentration in air <br />LEL - Lower explosive limit in air. <br />UEL - Upper explosive limit in air. <br />prod , rte ILL-= <br />Gasoline 1.3 8.2 <br />Diesel 0.6 .7.5 <br />Waste oil 9.0 <br />Methanol <br />6. 0 3 6. S 47.0 h.t <br />Comp.:.Nat. Gas 3.8 36� <br />Propane (LPG) 2.4' <br />Liquid Asphalt 9.0 9.5 v"1' <br />Z `I" <br />