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No. ..w <br /> Additiona: Site Assessment Work Plan <br /> Former HESS DUBOIS CLEANERS <br /> 348 West Harding Way, Stockton, California <br /> 21 March 2003 <br /> TABLE OF CONTENTS <br /> SECTION PAGE <br /> 1.0. INTRODUCTION AND SCOPE OF WORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 2.0. BACKGROUND AND SITE LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 2.1. UST REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 2.2. SITE ASSESSMENT/ INSTALLATION OF GROUND WATER <br /> MONITORING WELLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 2.3. GROUND WATER DEPTH AND FLOW DIRECTION . . . . . . . . . . . . . . . . . . . 3 <br /> 2.4. HYDROGEOLOGIC FLOW UNITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 <br /> 3.0. SCOPE OF WORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 <br /> 3.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES . . . . . . . . . . . . . . . . . . . 5 <br /> 3.2. PILOT BORING AND MONITORING WELL INSTALLATION . _ . . . . . . . . . 5 <br /> 3.3. REPORT PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 <br /> 4.0. FIELD PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 <br /> 4.1. PILOT BORINGS AND MONITORING WELL INSTALLATION . . . . . . . . . . 7 <br /> 4.1.1. Soil Sample Collection and Preservation Procedures . . . . . . . . . . . . . . . . 7 <br /> 4.1.2. Multi-level Ground Water Monitoring Well Completion . . . . . . . . . . . . . 8 <br /> 4.2. WELL DEVELOPMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 <br /> 4.3. EQUIPMENT DECONTAMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 <br /> 4.4. GROUND WATER MONITORING PROCEDURES . . . . . . . . . . . . . . . . . . . . . 9 <br /> 4.4.1. Static Water Level Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 <br /> 4.4.2. Well Evacuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 <br /> 4.4.3. Sample Withdrawal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 <br /> 4.4.4. Sample Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 <br /> FIGURES <br /> Figure 1 - Location Map <br /> Figure 2 - Site Plan <br /> Figure 3 - Geologic Cross-Section A -A' (with Dissolved Constituents) <br /> Figure 4 - Multi-Level Well Design <br />