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i <br /> Oxygen Release Compound, ORC® <br /> Field Results on the Disposition of <br /> Compounds <br /> There are two field studies at present, where magnesium has been measured. One of the <br /> studies also studied free phosphate levels. <br /> University of Waterloo: <br /> The following quote is from Dr. Gino Bianchi on his observations pertaining to a very <br /> limited migration of magnesium migration from ORC deposition.wells He is the lead <br /> author of an ORC based oxygen barrier study published in S`WMR, Winter 1994 <br /> "It is unlikely that sufficient magnesium would be dissolved to create scaling or reduced <br /> permeability problems in the aquifer The increase in magnesium during the (3 month <br /> long) Borden experiment (a reference to Canadian Forces Base Borden) was very <br /> localized, the concentration increased from approximately 5 mg/L (background for the <br /> site) to approximately 20 mg/L within 1 m downgradient of the ORC. The magnesium <br /> • concentration decreased to 5 mg/L, 1.5 m downgradient of the ORC " <br /> North Carolina State University: <br /> Magnesium samples were taken at a number of wells both outside and inside the ORC <br /> treatment zone. There was no significant difference in magnesium content for any of <br /> the samples with respect to the baseline levels. In fact, magnesium levels remained at <br /> between .5 and .67 mg/L in the ORC source well itself during the time it was measured <br /> (102 days). The average level in U.S. drinking water is 60 mg/L (in a range of 10 to <br /> 100 mg/L). Also, commercial mineral waters actually advertise the presence of percent <br /> levels of magnesium. <br /> Phosphate levels were completely unchanged from background in response to contact <br /> with ORC. All phosphate levels at the site were below .5 ppm. Even if several ppm are <br /> being released in proximity to the well, it is apparently able to be consumed rather <br /> quickly by the microbes present. <br /> REC EN ES IS ---------------------------------------------------------------------------- <br /> Bioremediation Products 27130A Paseo Espada, Ste 1407, Sari Juan Capistrano, CA 92675 <br /> Phone 714-443-3136 Fax 714-443-3140 <br />