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2003 Site Assessment Report <br /> - - <br /> July 18, 2003 S E C O R - -- <br /> Page ii <br /> is <br /> 8.0 POTENTIAL IMPACTS OF REMEDIAL ACTIONS..................................................22 <br /> 8.1 Groundwater Barrier...............................................................................................................22 <br /> 8.2 Hydraulic Control Line............................................................................................................22 <br /> 8.3 Combination of Groundwater Barrier and Hydraulic Control Line..........................................22 <br /> 8.4 Groundwater oxygenation System.........................................................................................22 <br /> 9.0 ESTIMATES PROJECT SCHEDULE FOR EACH ALTERNATIVE..........................23 <br /> 9.1 Groundwater Barrier...............................................................................................................23 <br /> 9.2 Hydraulic Control Line............................................................................................................23 <br /> 9.3 Combination of Groundwater Barrier and Hydraulic Control Line..........................................23 <br /> 9.4 Groundwater oxygenation System.........................................................................................23 <br /> 10.0 PREFERRED ALTERNATIVE ...............................................................................24 <br /> 11.0 SITE ASSESSMENT WORK PLAN.......................................................................24 <br /> 11.1 Scope of the Assessment......................................................................................................24 <br /> 11.2 Work Activities........................................................................................................................24 <br /> 11.3 Site Safety Plan......................................................................................................................24 <br /> 11.4 Permitting...............................................................................................................................25 <br /> 11.5 Soil Boring/Temporary Well Installation and Sampling..........................................................25 <br /> 11.6 Soil Sampling.........................................................................................................................25 <br /> 11.7 Groundwater Sampling..........................................................................................................25 <br /> • 11.8 Report.....................................................................................................................................25 <br /> 11.9 Quality Assurance/Quality Control.........................................................................................26 <br /> 11.9.1 Field QA/QC................................................................................................................26 <br /> 11.9.2 Laboratory QA/QC.....................................................................................................26 <br /> 11.10 Schedule._.._.,.____................ ......*'***"*.......­*****....... 26 <br /> 12.0 REFERENCES.........................................................................................................1 <br /> TABLES <br /> Table 1 - Water Wells Within One-Mile Radius of the Site <br /> Table 2 - AT123D Groundwater Modeling Input Parameters <br /> Table 3 - AT123D Modeling Results <br /> LIST OF FIGURES <br /> Figure 1 - Site Location Map <br /> Figure 2 - Site Plan with Proposed Soil Boring Locations <br /> Figure 3 - Generalized Geologic Cross-Section A-A' <br /> Figure 4 - Generalized Geologic Cross-Section B-B' <br /> Figure 5 - Rose Diagram —Shallow Groundwater <br /> Figure 6 Topographical Map <br /> Figure 7 - Profile of Monitoring Well Screen Intervals <br /> • Figure 8 Process Flow Diagram <br /> Figure 9 Temporary Well Diagram <br /> I:\Chevron\1001621\REPORTS\2003\2003FS\FS 2003 revD.doc <br />