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i w + w f ! • Q A Solid Track Record in the Scientific Verification of Product Performance I Defining the Science: of Using Slow Release Compounds In the last five years,the use of ORC has clearly 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 clearly 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 trlde Itterattrre Almost 200 citations are now documented and the full list along with some of publications themselves can be reviewed on our,%cb site at www regenesis corn 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 full senes of the world renown Battelle Bioremediation Conferences since 1993 A copy is available from Regenesis 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 th-in other alternative technologies and can inexpensively restore contaminated properties to market value Treatment with ORC is typically * 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 11 of residual hydrocarbons from the floor of the UST exc-ivation �.l - less than long-term monitonng costs of unassisted natural attenuation sites 1/4 the cost of a pump and treat system Compared with Air Sparging plus Vapor Containment An ORC application is typically inauch 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 ESRC Sav rigs fi 5aysngs Oklahoma $158,000 $46,000 $112000 700/6 ' California 180,000 80,000 100 000 55% Alabama 99,000 26,000 73,000 74% 'AA tizlaes were derived utdependetteh b} the saes'cnmulnnts the crisis are 11111 av%terns ants with the obietuve of%tie elnhurt Compared with Natural Attenuation (Monitoring Only) ORC treatments, if properly applied can result in site closure in as little as one vear 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 DRC Samgs 7 Savings Oklahoma $54,000 $46,000 $ 8,000 15a/o Alabama 54,000 26,000 28,000 52% ' °Ali values were denved ondependently ltti the<rta omsulunts REGENESiS 1011 Calle Sombra - San Clemente - California 92673 ' Tel 949 366 8000 - Fax 949 366 8090 - e-mail orc®regenesis cam - www regenesis com