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Closure Summary Report <br />Former TRACY DINER <br />95 West 11' Street, Tracy, California <br />TABLE OF CONTENTS <br />SECTION PAGE <br />1.0. INTRODUCTION....................................................... 1 <br />2.0. BACKGROUND........................................................1 <br />2.1. UNDERGROUND STORAGE TANK REMOVAL . ...................... 1 <br />2.2. SITE INVESTIGATIONS ............................................ 2 <br />2.3. ADJACENT SUBSURFACE INVESTIGATIONS ........................ 5 <br />2.4. GROUND WATER MONITORING PROGRAM ......................... 7 <br />2.4.1. Ground Water Depths .................. . ...................... 7 <br />2.4.2. Ground Water Flow Direction and Gradient ........................ 8 <br />2.4.3. Dissolved Petroleum Hydrocarbon Concentrations ................... 8 <br />2.5. SOIL PROPERTIES ................................................ 9 <br />2.6. REGIONAL GEOLOGIC SETTING ................................... 9 <br />( ; 3.0. ASSESSMENT OF HYDROCARBON -IMPACTED SOIL ..................... 9 <br />3.1. DISTRIBUTION OF PETROLEUM HYDROCARBON -IMPACTED SOIL... 11 <br />3.2. MASS OF ADSORBED PETROLEUM HYDROCARBONS REMAINING.. _ 12 <br />4.0. ASSESSMENT OF HYDROCARBON -IMPACTED GROUND WATER. ....... 12 <br />4.1. MASS, OF DISSOLVED PETROLEUM HYDROCARBONS REMAINING... 13 <br />4.2. ESTIMATED TIME TO COMPLIANCE ............................... 14 <br />5.0. SENSITIVE RECEPTOR SURVEY ....................................... 14 <br />6.0. CORRECTIVE ACTION (SOIL EXCAVATIONS)..........................15 <br />7.0. DISCUSSION AND CONCLUSIONS......................................17 <br />8.0. RECOMMENDATIONS.................................................19 <br />9.0. LIMITATIONS:.......................................................19 <br />.Advanced CeoEnvironnxntat, Inc. <br />