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t <br /> Stantec F <br /> No Further Action Request Report <br /> Chevron and ARCO Commingled Plume No. CP0034 <br /> April 10, 2012 s <br /> CONTENTS <br /> 1. INTRODUCTION................................................................................................................................................1 <br /> 2. BACKGROUND..................................................................................................................................................3 <br /> I <br /> 2.1. SITE DESCRIPTION.................:.....................................................................................................3 <br /> 2.2. REGIONAL GEOLOGY AND HYDROLOGY............................:....................................................3 <br /> 2.3. SITE GEOLOGY AND HYDROGEOLOGY....................................................................................3 <br /> 2.4. SUMMARY OF PREVIOUS WORK......................::................................:......................................4 <br /> 2.4.1. UST History............................................................................................:..............................................4 <br /> 2.4.2. Site Assessment History.........................................................................................................................7 <br /> 2.4.3. Remediation History..................:........................................... ..................................................................8 <br /> 2.5. DISTRIBUTION OF RESIDUAL HYDROCARBONS AND OXYGENATES..................................9 <br /> 2.5.1. Distribution of Hydrocarbons and Oxygenates In Soil.:....................................:..................................9 <br /> 2.5.2. Distribution of Hydrocarbons and Oxygenates In Groundwater........................................................10 <br /> 3. REQUEST FOR NO FURTHER ACTION REQUIRED DETERMINATION.............................................12 <br /> 3.1. RISKS TO PUBLIC HEALTH AND SAFETY AND ECOLOGICAL RECEPTORS......................12 <br /> 3.1.1. Sensitive Receptors.......:............................:............:...:.......................................................................:12 <br /> 3.1.2. Risks to Public Health and the Environment.................................................................................:.....13 <br /> 3.2. GROUNDWATER CLOSURE CONDITIONS...............................................................................14 <br /> 4. CLOSURE REQUIREMENTS........................................................................................................................16 <br /> 4.1. RECORD FEE TITLE HOLDER NOTIFICATION.............................................................:............16 <br /> 4.2. GEOTRACKER UPLOAD VERIFICATION............................................................::....................16 <br /> 4.3. WELL ABANDONMENT .................:........................:...................................................................16 <br /> 4.4. LIST OF DOCUMENTS.........:......................................................................................................17 <br /> 5. CONCLUSIONS...................................:............................................................................................................18 <br /> 6. REFERENCES..................................................................................................................................................19 <br /> 7. LIMITATIONS.............................................:.....................................................................................................20 <br /> 94275 NFAR 2012.doc i <br />