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September 27, 2007 <br /> Eric Price <br /> Ground Zero Analysis, Inc. <br /> 1714 Main Street. <br /> Esclon, CA 95320-1927 <br /> RE: Proposal for Bench scale evaluation of RegenOx'for removal of petroleum <br /> hydrocarbons <br /> Dear Eric: <br /> I Thankyou for your interest in PRIMA Environmental's bench-scale testing services. Per <br /> f your request, I have prepared a Scope of Work and Cost Estimate to evaluate RegenOxTM <br /> for use in in situ chemical oxidation of petroleum hydrocarbons. Specific compounds of <br /> concern are diesel range organics (DRO), gasoline range'organics (GRO), BTEX <br /> compounds (benzene, toluene,ethylbenzene and xylenes);fuel oxygenates (MTBE., TBA, <br /> { ETBE,DIPE, TAME) and lead scavengers [1,2-dichlorcethane (1,2-DCA) and ethylene <br /> dibromide(EDB)] <br /> RegenOx is proprietary oxidizing agent developed by Regenesis(San Clemente, CA). It is <br /> a based on Fenton's-type chemistry and uses a solid, slowrelease hydrogen peroxide and a <br /> catalyst to generate radicals that can oxidize a wide range of contaminants. RegenOx <br /> generates H2O2, which in turn decomposes to generate oxygen gas. Although the rate of <br /> gas formation should be relatively slow and should not cause significant stripping of <br /> volatile components,this will be evaluated in the laboratory study. . <br /> As with all strong oxidants, RegenOxTM may potentially have long term or short term <br /> secondary affects such as oxidation of soil-bound chromium to Cr(VI), oxidation of <br /> naturally occurring bromide to bromate, or mobilization of metals. The magnitude and <br /> duration of any secondary effects is site specific and may or may not be of significance. <br /> APPROACH <br /> Batch tests will be conducted to evaluate RegenOx. Specific goals are <br /> assess contamiant removal and estimate appropriate amount of RegenOx needed <br /> - determine whether losses are due to destruction or volatilization <br /> - evaluate the effect of RegenOx on secondary water quality parameters <br /> 10.265 Old Placerville Road,Suite 15,Sacramento,CA 95827-3042•Ph(916)363-8798•Fax(916)363-8829 <br /> www.primaenvironmental.coni - <br />