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Stantec <br /> L & M OPERABLE UNIT- THIRD QUARTER 2011 SITE STATUS, REMEDIAL SUMMARY, <br /> AND GROUNDWATER MONITORING REPORT <br /> Table of Contents <br /> 2.6.2.5 Dissolved Metals ..............................................................................................2.17 <br /> 2.6.2.1 Quality Assurance/Quality Control Samples.....................................................2.18 <br /> 2.6.2.2 General Laboratory Notes ................................................................................2.18 <br /> 2.7 THIRD QUARTER 2011 SEPARATE PHASE HYDROCARBONS AND HYDROCARBON <br /> CONCENTRATION TRENDS .........................................................................................2.18 <br /> 2.7.1 Shallow Zone ...................................................................................................2.18 <br /> 2.7.1.1 Separate Phase Hydrocarbons.........................................................................2.18 <br /> 2.7.1.2 Fuel Oxygenates and Petroleum Hydrocarbon Concentrations ........................2.21 <br /> 2.7.2 Deep Zone .......................................................................................................2.22 <br /> 2.7.2.1 SPH..................................................................................................................2.22 <br /> 2.7.2.2 Fuel Oxygenates and Hydrocarbon Concentrations .........................................2.23 <br /> 2.8 ARSENIC........................................................................................................................2.26 <br /> 2.9 PURGE WATER STORAGE AND DISPOSAL................................................................2.26 <br /> 2.10REQUESTED CHANGES TO MONITORING AND REPORTING PROGRAM................2.26 <br /> 3.0 STATUS OF REMEDIATION ACTIVITIES .......................................................................3.1 <br /> 3.1 DUAL PHASE EXTRACTION SYSTEM............................................................................3.1 <br /> 3.1.1 Dual Phase Extraction Systems Summary .........................................................3.1 <br /> 3.1.2 Dual Phase Extraction System Operational and Analytical Data — 3Q11 ............3.1 <br /> 3.2 L&M OU AND APARTMENT SOIL VAPOR EXTRACTION SYSTEMS.............................3.2 <br /> 3.2.1 L&M OU and Apartment Soil Vapor Extraction Systems Summary.....................3.2 <br /> 3.2.2 L&M OU and Apartment Soil Vapor Extraction Systems Operational Data— 3Q11 <br /> ...........................................................................................................................3.2 <br /> 3.2.3 L&M OU Soil Vapor Extraction System Analytical Data — 3Q11..........................3.2 <br /> 3.2.4 Apartment Soil Vapor Extraction System Analytical Data — 3Q11 .......................3.3 <br /> 3.3 SEPARATE PHASE HYDROCARBON REMOVAL...........................................................3.3 <br /> 4.0 SOIL VAPOR SAMPLING ................................................................................................4.1 <br /> 4.1 PREVIOUS SOIL VAPOR SAMPLING ACTIVITIES..........................................................4.1 <br /> 4.2 SOIL VAPOR SAMPLING THIRD QUARTER 2011 ..........................................................4.1 <br /> 4.2.1 Soil Vapor Sampling...........................................................................................4.1 <br /> 4.2.2 APSV Soil Vapor Concentrations .......................................................................4.2 <br /> 4.2.2.1 APSV Trends .....................................................................................................4.2 <br /> 4.2.3 UPSV Soil Vapor Concentrations .......................................................................4.2 <br /> 4.2.3.1 UPSV Trends .....................................................................................................4.2 <br /> 4.2.4 Quality Assurance/Quality Control-Samples and General Laboratory Notes.......4.3 <br /> 4.2.5 Conclusions and Recommendations ..................................................................4.3 <br /> 5.0 RECENT SUBMITTALS AND CORRESPONDENCE.......................................................5.1 <br /> 6.0 PLANNED ACTIVITIES FOR THE FOURTH QUARTER 2011.........................................6.1 <br /> 7.0 LIMITATIONS...................................................................................................................7.1 <br /> Iffidewater7W Stockton(P2A)\QMRs\201 1\3Q1 1\3Q11 QSSR QRSR QMR Stockton_FINAL.doc ii <br />