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' Well Installation and Quarterly Groundwater Monitoring Report <br /> Second Quarter 2008 <br /> 1950 West Fremont Street, Stockton, California <br /> ' TABLE OF CONTENTS <br /> ' Section Page <br /> 1.0 INTRODUCTION................................................................................................................1 <br /> 1.1 LOCATION AND BACKGROUND ......................................................................1 <br /> 1.2 INVESTIGATION PURPOSE AND OBJECTIVES ..............................................3 <br /> ' 2.0 WELL INSTALLATION AND GROUNDWATER MONITORING................................ <br /> 2.1 PRE-FIELD ACTIVITIES.......................................................................................3 <br /> 2.1.1 Permitting...............................................................................................................3 <br /> ' 2.1.2 Utility Clearance....................................................................................................3 <br /> 2.2 FIELD ACTIVITIES................................................................................................4 <br /> 2.2.1 Soil Borings............................................................................................................4 <br /> 2.2.2 Well Installation.....................................................................................................4 <br /> 2.2.3 Well Development. •5 <br /> 2.3 GROUNDWATER MONITORING AND SAMPLING.........................................5 <br /> 2.4 SAMPLE HANDLING AND ANALYSIS..............................................................6 <br /> 2.5 SLUG TESTING......................................................................................................6 <br /> 2.6 INVESTIGATION DERIVED WASTE MANAGEMENT....................................7 <br /> 2.7 SURVEYING...........................................................................................................7 <br /> 2.8 QUALITY ASSURANCE/ QUALITY CONTROL...............................................7 <br /> 2.8.1 Field Quality Control Samples...............................................................................7 <br /> 2.8.2 Laboratory Quality Control Samples.....................................................................8 <br /> 2.8.3 Quality Control and Quality Assurance Review of Data.......................................8 <br /> 3.0 SUMMARY OF RESULTS ................................................................................................9 <br /> 3.1 SUBSURFACE LITHOLOGY................................................................................9 <br /> 3.2 GROUNDWATER ELEVATIONS.........................................................................9 <br /> ' 3.3 SLUG TESTING.................................................................................................... .9 <br /> 3.4 GROUNDWATER VELOCITY ........................................................................... <br /> 10 <br /> 3.5 GROUNDWATER ANALYTICAL RESULTS ...................................................10 <br /> 3.5.1 MTBE and Additional Volatile Organic Compounds ......................................... <br /> 10 <br /> 3.5.2 Semi Volatile Organic Compounds.....................................................................11 <br /> 3.5.3 NDMA.................................................................................................................11 <br /> ' 3.5.4 Metals...................................................................................................................11 <br /> 4.0 CONCLUSIONS AND RECOMMENDATIONS ............................................................11 <br /> 5.0 REFERENCES ..................................................................................................................12 <br /> ' Project 102790 i July 2008 <br />