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OSHA NIEHS Oil Spill Cleanup Training Tool 11% <br />Chemical Dispersants <br />• Chemical dispersants such as COREXIT (Nalco) EC9500A and EC9527A may <br />be used for beach cleanup operations. <br />• Aerial and boat spraying are the most common delivery systems. <br />• Aerial Spraying - Aircraft provide the most rapid method of applying <br />dispersants to an oil spill. For aerial spraying, the dispersant is applied <br />undiluted. Careful selection of spray nozzles is critical to achieve desired <br />dose levels, since droplet size must be controlled. <br />• Boat Spraying - Dispersant may also be applied by workboats equipped <br />with spray booms mounted ahead of the bow wake. The preferred and most <br />effective method of application from a workboat is to use a low -volume, <br />low-pressure pump so the chemical can be applied undiluted. <br />WORKER EDUCATION & TRAINING PROGRAM 63 <br />