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SECOR INTERNATIONAL INCORPORATED <br /> www secor com <br /> s Econ <br /> Ozone Sample <br /> ' - 200 g sod <br /> 400 ml groundwater <br /> 1000 ml Erlenmeyer Flask <br /> 400 pL of oil sample (shake vigorously into water and sod 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 TPHIMTBE 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 />