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Stantec <br /> L & M OPERABLE UNIT- FOURTH QUARTER AND ANNUAL 2010 SITE STATUS, <br /> REMEDIAL SUMMARY, AND GROUNDWATER MONITORING REPORT <br /> Table of Contents <br /> 1.0 INTRODUCTION ..............................................................................................................1.1 <br /> 1.1 SITE DESCRIPTION.........................................................................................................1.2 <br /> 1.2 SUMMARY OF PREVIOUS INVESTIGATIONS AND REMEDIAL ACTION ......................1.3 <br /> 1.3 REGIONAL GEOLOGY/HYDROGEOLOGY .....................................................................1.9 <br /> 2.0 GROUNDWATER MONITORING AND SAMPLING.........................................................2.1 <br /> 2.1 GROUNDWATER MONITORING AND SAMPLING PROCEDURES................................2.1 <br /> 2.2 LABORATORY ANALYSIS ...............................................................................................2.2 <br /> 2.3 FOURTH QUARTER 2010 SHALLOW GROUNDWATER RESULTS...............................2.2 <br /> 2.3.1 Shallow Zone Groundwater Gradient..................................................................2.2 <br /> 2.3.2 Shallow Zone Groundwater Quality Data............................................................2.3 <br /> 2.3.2.1 Separate Phase Hydrocarbons...........................................................................2.3 <br /> 2.3.2.2 Petroleum Hydrocarbons and Fuel Oxygenates .................................................2.4 <br /> 2.3.2.3 Volatile Organic Compounds..............................................................................2.5 <br /> 2.3.2.4 Semi-volatile Organic Compounds .....................................................................2.5 <br /> 2.3.2.5 Dissolved Metals ................................................................................................2.6 <br /> 2.3.2.6 Quality Assurance/Quality Control Samples.......................................................2.6 <br /> 2.3.2.7 General Laboratory Notes ..................................................................................2.7 <br /> 2.4 FOURTH QUARTER 2010 B-ZONE GROUNDWATER RESULTS...................................2.7 <br /> 2.4.1 B-Zone Groundwater Gradient ...........................................................................2.7 <br /> 2.4.2 B-Zone Groundwater Quality Data .....................................................................2.8 <br /> 2.4.2.1 Separate Phase Hydrocarbons...........................................................................2.8 <br /> 2.4.2.2 Petroleum Hydrocarbons and Fuel Oxygenates .................................................2.9 <br /> 2.4.2.3 Volatile Organic Compounds..............................................................................2.9 <br /> 2.4.2.4 Semi-volatile Organic Compounds ...................................................................2.10 <br /> 2.4.2.5 Dissolved Metals ..............................................................................................2.10 <br /> 2.4.2.6 Quality Assurance/Quality Control Samples.....................................................2.10 <br /> 2.4.2.7 General Laboratory Notes ................................................................................2.10 <br /> 2.5 FOURTH QUARTER 2010 C-ZONE GROUNDWATER RESULTS.................................2.11 <br /> 2.5.1 C-Zone Groundwater Gradient Data.................................................................2.11 <br /> 2.5.2 C-Zone Groundwater Quality Data ...................................................................2.11 <br /> 2.5.2.1 Separate Phase Hydrocarbons.........................................................................2.11 <br /> 2.5.2.2 Petroleum Hydrocarbons and Fuel Oxygenates ...............................................2.12 <br /> 2.5.2.3 Volatile Organic Compounds............................................................................2.13 <br /> 2.5.2.4 Semi-volatile Organic Compounds ...................................................................2.13 <br /> 2.5.2.5 Dissolved Metals ..............................................................................................2.13 <br /> 2.5.2.6 Quality Assurance/Quality Control Samples.....................................................2.14 <br /> 2.5.2.7 General Laboratory Notes ................................................................................2.14 <br /> 2.6 FOURTH QUARTER 2010 D-ZONE GROUNDWATER RESULTS.................................2.14 <br /> 2.6.1 D-Zone Groundwater Gradient Data.................................................................2.14 <br /> 2.6.2 D-Zone Groundwater Quality Data ...................................................................2.15 <br /> 2.6.2.1 Separate Phase Hydrocarbons.........................................................................2.15 <br /> 2.6.2.2 Petroleum Hydrocarbons and Fuel Oxygenates ...............................................2.15 <br /> Iffidewater7W Stockton(Parcel 2A-0415)\Reports\QMR\2010\4010-Annual\4Q10 and Annual QSSRQRSRQMR Stockton_FINAL.doc i <br />