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• SLOR INTERNATIONAL INCORPORATED <br /> w .Secor.com <br /> SECOR <br /> 7) Provide an assessment of the site specific effectiveness of ozone sparging for eliminating <br /> identified soil and groundwater contamination in this case, and identify/demonstrate that any <br /> breakdown products of this process (i.e. acetone and/or other degradation products) are <br /> analyzed for and addressed by the planned remediation. <br /> SECOR will analyze soil and groundwater in the study to determine how the treatment has <br /> changed COC concentrations. SECOR will also analyze for degradation byproducts <br /> including on acetone, tert buyl alcohol, and tert butyl formate. All of these byproducts are <br /> also the degradation byproducts of microbial activity in the soil, and therefore maybe <br /> generated in equal or greater concentrations naturally but at a slower initial rate. <br /> SECOR will address each concern either in the study or through the presentation of chemical <br /> equations and rationale in the subsequent Bench Scale Study Report. <br /> SCOPE OF WORK <br /> Soil and groundwater samples will be prepared for treatment by mixing the required mass of soil <br /> and groundwater and adding the appropriate mass of MTBE gasoline to each sample. The <br /> samples will be homogenized to provide adequate mixing. Soils and groundwater have been <br /> sampled from the area of contamination, but will be spiked with MTBE gasoline to ensure that <br /> adequate BTEX, TPH and MTBE mass is present to observe the desired reactions. <br /> The treatment protocol is listed below: <br /> Treatment: <br /> Soil and groundwater samples will be treated with 30 times the predicted stoichiometric dose of <br /> ozone (samples will be analyzed after a set sparge time which is representative of the <br /> appropriate ozone dosing). <br /> Ozone will be generated and sparged using a Pacific Ozone model 21 ozone generator which <br /> has the capacity to generate 0.20 pounds per day of ozone using a breathing air feed (20% <br /> oxygen). <br /> Sample Preparation: <br /> Untreated and Control <br /> - 200 g soil. <br /> - 400 ml groundwater. <br /> - 1000 ml Erlenmeyer Flask. <br /> - 400 pL of MTBE-gasoline sample (shaken vigorously into water and soil after addition). <br /> - Sample will be allowed to equilibrate for 24 hours. <br /> - Control will be sparged with air at the equivalent flow rate and duration as the ozone <br /> system; <br /> - Untreated will be analyzed with the ozone and control samples without any treatment. <br /> 3 <br />