Laserfiche WebLink
---------- —------- - ------ <br /> Former Discovery Chevrolet June 5, 1998 <br /> Tracy,Califomia Corrective Action Plan <br /> TABLE OF CONTENTS <br /> 1.0 INTRODUCTION.......................................................................................................I <br /> 1.1 Site Location........................................................................................................2 <br /> 1.2 Previous Site Work ..............................................................................................2 <br /> 1.3 Remedial Work Objectives ..................................................................................2 <br /> 2.0 SITE DESCRIPTION.................................................................................................3 <br /> 2.1 Site and Facility Description................................................................................3 <br /> 2.2 Site Vicinity and Local Land Use........................................................................3 <br /> 2.3 Local Topography................................................................................................4 <br /> 2.4 Well Inventory Survey.........................................................................................4 <br /> 3.0 EVALUATION OF REGIONAL AND LOCAL HYDROLOGY..........................4 <br /> 3.1 Regional Geology.................................................................................................4 <br /> 3.2 Regional Hydrogeology and Water Use...............................................................5 <br /> 3.3 Local Geology......................................................................................................6 <br /> 3.4 Local Hydrogeology.............................................................................................6 <br /> 4.0 EXTENT OF SOIL AND GROUNDWATER CONTAMINATION....................7 <br /> 4.1.1 Initial Vertical and Horizontal Extent of Hydrocarbon-Impacted Soil.............7 <br /> 4.1.2 Current Vertical and Horizontal Extent of Hydrocarbon-Impacted Soil ..........7 <br /> 4.2.1 Initial Horizontal and Vertical Extent of Hydrocarbon-Impacted Water..........8 <br /> 4.2.2 Current Horizontal and Vertical Extent of Hydrocarbon-Impacted Water.......8 <br /> 5.0 CORRECTIVE ACTION OPTIONS ........................................................................9 <br /> 5.1 Alternative No. 1 —Nondetectable Concentrations............................................9 <br /> 5.2 Alternative No. 2—Unaffected Potential Beneficial Uses.................................9 <br /> 5.2.1 Soil 9 <br /> 5.2.1.1 Excavation and Disposal..............................................................................10 <br /> 5.2.1.2 Excavation and Aboveground Treatment.....................................................12 <br /> 5.2-1.3 Groundwater Extraction from Excavation ...................................................13 <br /> 5.2.2 Groundwater...................................................................................................14 <br /> 5.2.2.1 Passive Remediation....................................................................................14 <br /> 5.2.2.2 In-Situ Bioremediation.................................................................................15 <br /> 5.3 Conclusions......................................................................................................15 <br /> 6.0 PROPOSED CORRECTIVE ACTION OPTION..................................................16 <br /> 6.1 Recommended Corrective Action for Soil and Groundwater............................16 <br /> 6.2.1 Description of Remedial Work- Soil..............................................................17 <br /> 6.2.2 Description of Remedial Work - Groundwater...............................................18 <br /> 6.3 Required Pen-nits................................................................................................19 <br /> 6.4 Implementation Schedule...................................................................................19 <br /> 6.5 Proposed Verification Monitoring .....................................................................19 <br /> 7.0 DISTRIBUTION.......................................................................................................20 <br /> 8.0 LIMITATIONS..........................................................................................................20 <br /> 9.0 REFERENCES CITED 21 <br /> 3001-21.cap ii HORIZON ENVIRONMENTAL INC. <br />