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CROSBY & OVER70M <br /> Environmental MonogemenL Inc, <br /> 8430 Amelia Street o Dakland,California 94621 <br /> (415)633-0336 <br /> PROCEDURES FOR 550 GALLON WASTE OIL TANK <br /> WHICH HAS BEEN UNEARTEI.ED <br /> Arrive at location <br /> Conduct safety meeting with site personnel after survey of area <br /> Secure area as a no smoking area (minimum Of 25 feet radius from any <br /> ignition sources) <br /> Check quantity of material in tank <br /> Check tank for Lower Explosive Limit (L.E.L. ) o-ygen with gastech <br /> Remove any free standing liquids from tank with vacUlum truck <br /> grounding both tante and truck to common ground <br /> 25 feet from ignition <br /> Vacuurij �1-.ank exhaust is located at le,--sL. <br /> source <br /> Check Lower Explosive Limit Oxygen with gastech to cut tank) <br /> (If Lower Explosive Limit is 10% or lower, set up <br /> If Lower Explosive Limit is above 10%, rinse tank with fresh water <br /> (approx. 20 gallons) <br /> Remove rinse water from t-an1c , pulling vacuum from top of <br /> product trying to remove any light ends (Check ground) <br /> Check with gastech for Lower Explosive Limit Oxygen. <br /> Lower Explosive Limit is well below 10%, set up for cutting' <br /> If Lower Eizplosive Limit is above 20% inert with dry ice <br /> (20 pounds per 1000 gallons) . The period of time to inert <br /> varies batween J- <br /> N wo to six hours . <br /> Drill a 1/2 inch hole with electric drill motor and drill <br /> to allow sa-vyzall blade to enter tank <br /> Cut with sawzall a 3 foot by 3 foot access in tank <br /> Remove all remaining free standing liquids , (Check ground) , <br /> with vacuum truck. <br /> 24 Hour Emergency Response(800)821-0424 <br />