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Quarterly Report - Fourth Quarter 2003 <br /> Former CHASE CHEVROLET (Van Buren) Facility <br /> 424 North Van Buren Street, Stockton, California <br /> TABLE OF CONTENTS <br /> SECTION PAGE <br /> 1.0. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 2.0. PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 21 In-Situ OZONE SPARGE SYSTEM OPERATION 1 <br /> 2 2 QUARTERLY WELL MONITORING PROCEDURES 1 <br /> 2 2 1 Well Monitoring and Purging 2 <br /> 2 2 2 Collection of Ground Water Samples 2 <br /> 3.0. FINDINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 <br /> 3 1 GROUND WATER ELEVATION AND GRADIENT 2 <br /> 32 ANALYTICAL RESULTS OF WATER SAMPLES 3 <br /> 4.0. SUMMARYICONCLUSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 <br /> 5.0. RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 <br /> 6.0. LIMITATIONS . . . . . . . . . . . . . . . . . 4 <br /> FIGURES <br /> Figure 1 -Location Map <br /> Figure 2 -Site Plan <br /> Figure 3 - Ground Water Elevation Map <br /> Figure 4 - TPH-g/Benzene Impacted Ground Water <br /> TABLES <br /> Table 1 - Ground Water Elevation Data <br /> Table 2 -Analytical Results of Ground Water Samples <br /> Table 3 - Historical Analytical Results of Ground Water Samples-EPA Methods 8015m, <br /> 8020/8021 <br /> Table 4 -Historical Analytical Results of Ground Water Samples-EPA Method 8260B <br />