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• AR INTERNATIONAL INCORPORATED <br /> w .secorxom <br /> SECOR <br /> Ozone Sample <br /> 200 g soil. <br /> 400 ml groundwater. <br /> 1000 ml Erlenmeyer Flask. <br /> 400 pL of oil sample (shake vigorously into water and soil after addition. <br /> Sample will be allowed to equilibrate for 24 hours. <br /> Sample will be treated with ozone for 2 to 6 hours at 0.20 lbs of ozone per day at a rate <br /> of 10 scf/hr or approximately 0.5 liters per minute. <br /> Treatment Procedure: <br /> Each 1000 mL Erlenmeyer flask will be plumbed to the ozone generator with a sealed cap and <br /> an inlet and outlet tube. The in-let will be attached to a glass tube inserted to the bottom of the <br /> flask. The tube will be placed at the bottom of the flask and ozone will pass through the soil and <br /> water up through the head space of the container and out the outlet tube. The outlet tube will <br /> be attached to a large sealed bag to collect off-gasses. The blank will be sparged with clean air <br /> using the air supply for the ozone sparging unit. A gas sample will be taken at the start of each <br /> test, once three headspaces of gas have purged the container. Initial gas concentrations <br /> (before sampling) will be assumed to be at equilibrium and will be estimated using the Henry's <br /> constant for each compound (an average value will be used for TPHg). The measured gas <br /> sample will be used to estimate the mass of TPH/MTBE volatilized during the test. The blank <br /> will be used to assess the difference between air sparging and ozone sparging. <br /> Post treatment metals concentrations will be measured in filtered groundwater at the end of the <br /> treatment by EPA method 6010. Chromate will be measured by a HACH field method using a <br /> UV spectrophotometer. Chromate will be measured by EPA method 7196A only if the total <br /> chromium concentration and field method indicate dissolved chromium/hexavalent chromium is <br /> above the 10 pg/L. Groundwater will be analyzed for TPHg, BTEX, MTBE, TBA, TBF and <br /> acetone by EPA method 8260. <br /> Soil Oxidant Demand Testing: <br /> Soil oxidant demand testing will be conducted using potassium permanganate, because it is the <br /> most accurate method of measuring soil oxidant demand. The test will be conducted according <br /> to the attached procedure. <br /> REPORTING <br /> SECOR submit a letter report detailing the results of the proposed study approximately two <br /> weeks after completion of the study. <br /> SECOR is prepared to initiate this study upon RWQCB approval, and respectfully requests <br /> expedited review and approval from the RWQCB. <br /> 4 <br />