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ORC TECHNICAL BULLETIN # V.9 <br /> Oxygen Release Compound, ORC® <br /> Oxygen Barrier Dynamics <br /> An Oxygen Barrier is designed to bioremediate dissolved phase hydrocarbon plumes by <br /> providing oxygen in the form of ORC The barrier consists of a series of wells or trenches <br /> containing ORC, and remediatcon takes place upon the formation of an oxygenated zone <br /> which supports the bioremediation activity <br /> ORC OXYGEN BARRIER <br /> DGsrefrrilM�e <br /> x <br /> i <br /> a xe <br /> ORC Soda Ie toe VA <br /> The dynamics of the barrier are governed by the amount of oxygen placed in the wells, in the <br /> form of ORC, and the oxygen release rate Typically, a bamer might consist of 10 wells, <br /> 6 feet on center If the wells are 6 inches an diameter, and are loaded with ORC through 10 <br /> feet of contaminated saturated zone, the total available oxygen is about 21 kilograms The <br /> oxygen becomes available in equal increments, as it has a zero order release kinetics, and <br /> should last a minimum of 120 days Consequently, about 175 grams per day becomes <br /> available for bioremediation In a highly conservative use ratio of 3 grams of oxygen to 1 <br /> gram of BTEX ( in some cases it can be as low a 1 1) we can plan for a daily remediation <br /> rate of about 58 grams of hydrocarbon per day <br />