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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 RECENESIS has <br /> conducted a limited number of trials with ORC in btoprles 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 inminent 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 714443-3136 Fax 714-443-3140 <br />