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biA't. I ?. !998 1): "1 Nu. 338': F. 3? i. tb131 • • Page 1 of 2 i i r - J nvironmenta y Sa e With reference to the safety of contacting ORC with ground water the following review is provided. Regenesis welcomes any farther inquiries. jDefinition of ORC and its Components: ORC is a proprietary form'ilation of magnesium peroxide(MgOz), which is the active agent. The product contains both magnesium oxide (magnesia,MgO) and magnesium peroxide. A few percent of food grade potassium phosphate(KH:PO,or K2BPO4) is also present. Behavior of ORC it..Contact with Water: ORC is designed to releastt oxygen when wet. Essentially ORC is"oxygenated magnesia" and it gives up the oxygen upon yontact with water. The spent magnesium peroxide is convened to magnesium hydroxide (Ml;(OH)2). This also is the fate of the magnesium oxide which simply hydrates to form the hydroxide: MgO +H2O -), Mg(OH)2. Therefore, the uniform endpoint of ORC, from both directions, is magnesium hydroxide. The safety of this material is easily ccnveyed by mention of the fact that a suspension of magnesium hydroxide in water is ordinary Milk c:f Magnesia. The levels of phosphates from the product are low and they are the same materials that are used to support microbial growth fox bioremediation. Other Features: All of the magnesium proc;ucts discussed are virtually totally insoluble. The ORC can be used in pure form or mixed with an inert carrier matrix and contained in a filter sock that is removable from the source well at will. Magnesium oxide, peroxk a and hydroxide are all safe to ingest in small quantities_ Magnesium oxide is sold as a magnesium supplement for cattle and is used as a fertilizer material. Magnesium peroxide and magnesium hydroxide are also safe to ingest as they are both used as anti-acids. ORC is ' used in retail horticultural products, such as Oxygen Plus ferti:izer, which is now produced by Ringer Corporation. These products are sold in all fifty states, wVhere they have met Department of Agriculture fertilizer regirration requirements and safety criteria for entering the environment and the food chain. Magnesium peroxide has been used in dentifrices and other dental products. As with all chemicals safe handling practices should be used to avoid any excess exposure to shin and eyes. J A full MSDS is provided with the product. The following statement is useful as a convenient summary of the key issues covered in the MSDS: ORC is the trade name for a form Of magnesium peroxide. It is important to avoid contact with skin and eyes and to avoid brecithing the dust. The material is not toxic, in fact, it is listed in certain ' 4/23/98 9:59:24 AM