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• Table of Contents <br />' EXECUTIVE SUMMARY ............................................... ....................................... . ..... <br /> Listof Figures.......................... ..... .. ........................... . ..................... ................. .........iii <br /> Listof Tables......... ........................................ ..... ................... .................................... .. iv <br /> 1.0 INTRODUCTION...................... ..................... ... ....................... .......................... 1 <br />' 2.0 EXPERIMENTAL PROCEDURES............... ... . ... ..... . ........... ..... ............. ...... 3 <br /> 2 1 Characterization of Soil and Groundwater 3 <br />' 2 2 Ozone Demand 3 <br /> 2 3 Confirmation of Contaminant Removal 4 <br /> 2 4 Effect of Ozonation on Secondary Water Quality parameters 4 <br />' 2 5 Natural Attenuation of Cr(VI) 4 <br /> 2 5 1 Available Cr(VI) Reducing Capacity of Soil (Bartlett Method) 5 <br /> 2 5 2 Fate of Cr(VI) 5 <br /> 2 6 Effect of Treatment on TSS and Particle Size 5 <br /> 2 7 Analytical Procedures 5 <br /> 3.0 RESULTS AND DISCUSSION................. .. .. ... ............................................... .... 7 <br /> 3 1 COC Removal 7 <br /> 3 2 Secondary Water Quality Parameters 7 <br /> 3 3 Formation and Fate of Cr(VI) 10 <br /> 3 4 Ozone Demand 11 <br /> 3 5 Effect of Treatment on TSS and Particle Size 13 <br /> 4.0 ENGINEERING CONSIDERATIONS.......... ...................................................... 14 <br /> 5.0 CONCLUSIONS.............. ..... ... . ....................... .... ..... ..... .......................... .. 15 <br /> APPENDIX <br /> PRIMA Environmental a Eva!of Ozone <br /> January 27 2005 ENSR-Unocal 5098 <br />