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W <br />CROSBY'& OVERTOA <br />Environmentol Manogement Inc. <br />8430 Amelia Street * Oakland, Califomia 94621 <br />(445) 633*336 <br />Arrive at location <br />Con duct'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.) oxygen with gas tech <br />Remove any free standing liquids from tank with vacuum truck, <br />grounding both tank and truck to common ground <br />Vacuum tank exhaust is located at least 25 feet from ignition 41 <br />source <br />Check Lower Explosive Limit Oxygen with gastech <br />(If Lower Explosive Limit is 10% or lower, set up to cut tank) <br />If Lower Explosive Limit is above 10%, rinse tank with fresh water <br />(approx. 20 gallons) <br />Remove rinse water from tank, pulling vacuum from top of <br />product trying to remove any light ends (Check ground) <br />-- Check with gastech for Lower Explosive Limit Oxygen. (if <br />Lower Explosive Limit is well below 10%, set ►up for cutting. <br />If Lower Explosive Limit is above 20% inert with dry ice <br />(20 pounds per 1000 gallons). The period of time to inert <br />varies beten two to six hours. <br />-- Drill a 1/2 inch hole with electric drill motor and drill <br />to allow sawzall 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 />wit'.t vacuun truck. <br />