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A Solid Track Record in the Scientific Verification of Product Performance Defining the Science of Using Slow Release Compounds in the last five years,the use of ORC has dearly evolved from being an exploratory method to becoming a fully recognized technology.To date over 5,000 ORC applications have been made in every state and in over a dozen countries.This pro- gression has been dearly marked by a solid record of publications,by Regenesis and its customers, in the peer review litera- ture,at numerous technical conferences and in the trade literature.Almost 200 citations are now documented and the full list along with some of publications themselves can be reviewed on our web site at www.regenesis.com. Most recently, a com- pendium of 39 papers have been published(`Accelerated Bioremediation Using Slow Release Compounds' representing all the papers that were presented at the hill series of the world renown Battelle Bioremediation Conferences since 1993.A copy is available from Regenesa that also contains an engineering manual for ORC treatment design and installation. Cost Comparison By accelerating natural attenuation ORC applications can be more cost-effective than other alternative technologies and can inexpensively restore contaminated properties to market value.Treatment with ORC is typically: e 1/4 to 1/2 the cost of air sparging with vapor containment • equal to or less than the cost of excavation, hauling and disposal of residual hydrocarbons from the floor of the UST excavation • less than long-term monitoring costs of unassisted natural attenuation sites • 1/4 the cost of pump and treat system Compared with Air Sparging plus Vapor Containment An ORC application is typically much more cost effective than air sparging with vapor containment The following includes a summary of costs comparing ORC to air sparging systems on various sites': Site AS!SVE ORC Savings % Savings Oklahoma S158,000 546,000 $112,000 70% California 180,000 80,000 100,000 55% Alabama 99,000 26,000 73,000 74% 'All values were derived independently by the sits/consultants.The costs are full systems costs with the objective of site closure. Compared with Natural Attenuation (Monitoring Only) ORC treatments, if properly applied,can result in site closure in as little as one year.This can also be more cost effective than only monitoring the site and relying on unassisted natural attenuation.Applying ORC can restore property to market value and avoid long term monitoring costs as well as potential future liability': Site Monitor Only ORC Savings %Savings Oklahoma $54,000 $46,000 S 8,000 15% Alabama 54,000 26,000 28,000 52% 'All.loss were derived independently by the sites'consultants. t..'. REGENESIS 1011 Calle Sombre • San Clemente • California 92673 Tel: 969.366.8000. v Fax: 969.366.8090. • e-mail:orearegenesis.com w www.regenesis.com