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I ORC TECHNICAL BULLETIN # V.6 <br /> Oxygen Release Compound,ORC® <br /> Qualitative Guidelines for Soil <br /> Remediation Applications (Biopiles) <br /> ORC has applications in the remediation of soil biopiles. REGENESIS has <br /> conducted a limited number of trials with ORC in biopiles with promising results. <br /> Essentially, ORC should be used at concentrations between .1 and 1% by weight of soil. <br /> At concentrations above 1%, pH may become an issue, depending on the buffering <br /> capacity of the soil. This may not be a factor as application levels above I% may become <br /> cost prohibitive before the technical limits develop. It will cost approximately $24 per <br /> cubic yard for every .1% of ORC applied by weight, in addition to cost of mixing. <br /> A single application should last 6 months and serve as an effective polishing agent at sites <br /> where closure is imminent. The asymtotic nature of soil clean-up, that puts remediation <br /> on a half-life curve, dictates that considerable resources may be still be necessary for the <br /> final clean-up levels to be achieved. It should be noted that the commercial, non- _ <br /> intercalated(slow-release) forms of calcium peroxide can be pH limiting at levels of about <br /> .25% and will only last about a month, thus requiring many more additional applications <br /> relative to ORC. <br /> ORC use in soil cleanup is a specialized application. One should generally eliminate the <br /> ability to use forced air to provide oxygen to a soil pile. Having met this requirement, <br /> solid peroxygens then become a candidate technology. Factors that may disqualify forced <br /> air technology in favor of ORC include the need to avoid an active system or the inability <br /> for such a system to work. Active systems may present installation and monitoring <br /> problems, particularly in remote or inclement conditions. Also, urban factors such as'. <br /> nuisance issues or vandalism may have to be considered. Also, forced air may volatilize <br /> pollutants in conflict with regulatory standards or may be ineffective in heavy soils where <br /> air becomes channeled. <br /> REGEN ES IS ----------------------------------------------------------------------------- <br /> Bioremediation Products 27130A Paseo Espada, Ste 1407, San Juan Capistrano,CA 92675 <br /> Phone: 714-443-3136 Fax: 714-443-3140 <br />