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i <br /> Closure Summary Report <br /> MANTECA CITY CORPORATION YARD <br /> 210 East Wetmore Street, Manteca, California <br /> TABLE OF CONTENTS <br /> SECTION PAGE <br /> 1.0. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 2.0. BACKGROUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 2.1. UST REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 2.2. PREVIOUS SITE INVESTIGATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 <br /> 2.3. REGIONAL GEOLOGICAL/HYDROGEOLOGICAL SETTING . . . . . . . . . . . 3 <br /> 2.4. LOCAL GROUND WATER SETTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 <br /> 3.0. WATER WELL RECEPTOR SURVEY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 <br /> 4.0. OZONE INJECTION REMEDIATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 <br /> 5.0. ASSESSMENT OF HYDROCARBON-IMPACTED SOIL AND <br /> GROUNDWATER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 <br /> 6.0. ENVIRONMENTAL RISK ASSESSMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 <br /> 7.0. CONCLUSIONS AND RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 <br /> 5.0. LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 <br /> FIGURES <br /> Figure 1 -Location Map <br /> Figure 2 - Site Plan <br /> Figure 3 - Ground Water Elevation Map (March 2008) <br /> Figure 4 -Sensitive Receptor Survey Map <br /> Figure 5 - Geological Cross Section:A -A' <br /> Figure 6 - Geological Cross Section:B -B' <br /> Figure 7 - Geological Cross Section: C- C' <br /> Advanced GcoEnvironmental,Inc. <br />