Laserfiche WebLink
yPRiMA <br /> v IRONMENTAL <br /> December 9, 2007 <br /> Clint Harts <br /> SECOR <br /> 3017 Kilgore Avenue, Ste 100 <br /> Rancho Cordova,CA 95827 <br /> RE: Scope and Cost Estimate for evaluation of ozone,Circle K Site,Lathrop <br /> Dear Clint: <br /> Thank you for your interest in PRIMA Environmental Inc's (PR vIA's)bench-scale <br /> testing services. Per your request, I have prepared a Scope of Work and Cost Estimate to <br /> evaluate ozone for the destruction of chemicals of concern(COCs)in soil and <br /> groundwater at the Circle K site in Lathrop, California. Specific COCs are gasoline range <br /> organics(GRO), BTEX compounds (benzene, toluene, ethylbenzene, and xylenes), <br /> methyl t-butyl ether(MTBE)and t-butyl alcohol (TBA). t-Butyl formate(TBF)will also <br /> be analyzed as it is a potential intermediate of MTBE and/or TBA oxidation. <br /> BACKGROUND <br /> Ozone. Ozone gas is a strong oxidant that can destroy a wide range of organic <br /> compounds, including site COCs. Dissolved iron and other metal ions in soil and <br /> groundwater can increase the effectiveness of ozone by reacting with ozone to form <br /> hydroxyl radicals. The hydroxyl radical is an even stronger oxidant than ozone and may <br /> react more quickly and produce fewer intermediates than ozone itself. Equations 14 <br /> show the reactions for conversion of BTEX to carbon dioxide(CO2)and water(H2O). <br /> The stoichiometric ozone requirements for the complete mineralization of each <br /> contaminant are given in Table 1. Chemical reactions cannot be written for GRO(and <br /> stoichiometric requirements cannot be pre-determined)because GRO is complex <br /> mixtures of chemicals. In practice, a greater-than-stoichiometric dose of 03 may be <br /> required because 03 is a non-selective oxidant that will react with natural organic matter <br /> and other non-target compounds, and because ozone naturally decomposes. <br /> 1503 +C6H6 6CO2+ 1502+3H2O Eqn. 1 <br /> benzene <br /> 1803 +C71­18 3 7CO2+ 1802+4H2O Eqn. 2 <br /> toluene <br /> 2103+CsHlo—>8CO2+2102+5H2O Eqn. 3 <br /> ethylbenzene or <br /> Xylene <br /> 10265 Old Placerville Road,Stdte 15,Sacramento,CA 95827-3042 a Ph(916)3634798.Fax(916)363-8829 <br /> www.piimaenvimo ental.com <br />