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• The tank will then be decontaminated in place, once decontamination is complete marine chemist will certify that the tank is cleaned at which the tank will be marked appropriately. Upon certification dry ice will be added into the tank. Once dry ice is added the tank will be removed and placed directly on a flat bed truck. In which the tank will be secured and transported to the nearest recycling facility. • Decontamination is required to remove residue from the tank, so the tank can be disposed of as a clean material. • The decontamination area will be marked as an exclusion zone. Proper personnel, protective equipment, medical emergency equipment, splash shower, and eye wash station must be available. • Before opening the tank to permit entry for water blasting, foaming, or other cleaning methods are used, the tank will be checked again for the presence of flammables, and appropriate actions will be taken to reduce flammable levels. Confined space entry procedures apply. • Personnel will wear PVC splash suits with respiratory protection appropriate to the hazards. A method for rinse water containment and proper disposal procedures will be established. Safety Certification before cutting Tanks The preferred method for cutting (rendering) tanks is to use hand held rivet buster. The less preferred method is to use a cutting torch. A power metal chisel may also be used. The primary hazard when cutting tanks, using either the hand held rivet buster, cutting torch or chisel is the possibility of igniting flammable vapors in the tank. When using the hand held rivet buster, the possibility of catapulting metal pieces must also be considered. Whenever tanks are cut, all unnecessary personnel should be removed from the area. The possibility of an explosion of flammable vapors should always be considered. • Sample the tank atmosphere for flammable vapors and oxygen. Before any work can begin in the tank, the tank atmosphere must be less than 10% LEL or less than 8% 02. If the tank atmosphere shows flammable vapors in excess of 10% LEL, then some action must be taken to reduce the flammable vapor concentration or reduce the oxygen concentration to less than 8 percent 02. Air monitoring equipment should correspond to the specific gas encountered. Never use non-intrinsically safe equipment such as a photo ionization detector (PID) in a potentially explosive environment. If the tank atmosphere is greater than 10% LEL, one of these actions can be taken to make the tank safe for cutting. Ventilate the Tank This procedure will only work with fairly clean products. Readings should be taken at the location of the tank exhaust to check for flammable vapors. Note that exhausted vapors may be flammable, toxic, or require respiratory protection. Clean and Ventilate the Tank