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r <br /> r <br /> 1 Closure Summary Report <br /> ort <br /> Proposed EL DORADO APARTMENTS <br />' 2424 and 2450 South El Dorado Street, Stockton, California <br /> TABLE OF CONTENTS <br /> SECTION PAGE <br />' 1.0. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <br /> 2.0. BACKGROUND . 1 <br /> 21 REGIONAL GEOLOGIC SETTING 1 <br /> 22 UNDERGROUND STORAGE TANK REMOVAL AND <br />' OVER-EXCAVATION 2 <br /> 23 PREVIOUS SITE INVESTIGATION ACTIVITIES 3 <br /> I <br /> 24 SITE HYDROGEOLOGIC CONDITIONS 4 <br /> 2 4 1 Geology 4 <br /> 2 4 2 Ground Water Depth and Gradient 5 <br /> 3.0. ASSESSMENT OF PETROLEUM HYDROCARBON-IMPACTED SOIL AND <br /> GROUND WATER FROM SOIL PROBE BORINGS . . . . . . . . . . . . . . . . . . 5 <br /> 31 HYDROCARBON-IMPACTED SOIL 5 <br /> 3 2 HYDROCARBON-IMPACTED GROUND WATER 5 <br /> 4.0. GROUND WATER MONITORING EVENTS: MAY 2002 TO <br /> DECEMBER 2002. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 <br /> 5.0. WATER WELL RECEPTOR SURVEY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 <br /> 6.0. DISCUSSION AND CONCLUSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 <br /> 70 RECOMMENDATIONS . <br /> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <br /> 7 <br /> 8.0. LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . :. . . . . . . . 7 <br /> I <br /> I <br /> • <br /> IAdvanced GeoEnvironmental,Inc <br />