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1 <br /> 1 First and Second Quarters 2005 <br /> . CHAPIN BROTHERS INVESTMENTS, INC. <br /> ' 1766 Monte Diablo Avenue, Stockton, California <br /> TABLE OF CONTENTS <br /> SECTION PAGE <br /> 1.0. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 2.0. PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 21 GROUND WATER TREATMENT OPERATION 1 <br /> 22 GROUND WATER TREATMENT MONITORING PROCEDURES 2 <br /> ' <br /> 23 QUARTERLY GROUND WATER MONITORING AND SAMPLING 3 <br /> 2 3 1 Low-Flow Well Monitoring and Ground Water Sample Collection <br /> and Analysis 3 <br /> ' <br /> 232 Well Monitoring, Purging and Ground Water Sample Collection <br /> and Analysis 4 <br /> ' 3.0. FINDINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 <br /> 31 GROUND WATER TREATMENT RESULTS 5 <br /> 3 1 1 Laboratory Analysis of Influent and Effluent Ground Water Samples 5 <br /> '{. 3 12 Mass-Volume Removal Calculations 6 <br /> 32 GROUND WATER MONITORING RESULTS 6 <br /> 3 2 1 Ground Water Elevations and Gradient 7 <br /> 3 2 2 Field Monitoring for Low-Flow Ground Water Sampling 7 <br /> 3 2 3 Analytical Results of Low-flow Ground Water Sampling 7 <br /> 324 Analytical Results of Full-Purge Ground Water Samples 8 <br /> 3 2 5 Natural Attenuation - Geochemical and Geophysical Results 8 <br /> 33 GEOTRACKER CONFIRMATIONS 9 <br /> ' 4.0. SUMMARY AND CONCLUSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 <br /> 5.0. RECOMMENDATIONS . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 <br /> LIMITATIONS 12 <br /> FIGURES <br /> Figure 1 -Location Map <br /> Figure 2 -Site Plan <br /> Figure 3 - Ground Water Contours <br /> Figure 4 - Dissolved Contamination - TPH-Gas <br /> Figure 5 -Dissolved Contamination -Benzene <br /> Advanced GeoiJnviranmental,Inc <br /> 1 <br />