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TABLE OF CONTENTS <br /> (continued) <br /> tPage <br /> 7.0 DISCUSSION OF REMEDIATION ALTERNATIVES . . . . . . . . . . . . . . 13 <br /> ' 7.1 Removal of Petroleum Hydrocarbons From Soils . . . . . . . . . . . . . 13 <br /> 7.1.1 Passive Remediation . . . . . . . . . . . . . . . . . . . . . . . . . 13 <br /> ' 7.1.2 In Situ Soil Vapor Extraction . . . . . . . . . . . . . . . . . . . 14 <br /> 7.2 Removal of Dissolved Petroleum Hydrocarbons From Ground Water . 14 <br /> 7.2.1 Ground Water Pumping . . . . . . . . . . . . . . . . . . . . . . . 15 <br /> 7.2.2 In Situ Bioremediation . . . . . . . . . . . . . . . . . . . . . . . 15 <br /> 7.2.3 Vapor Extraction . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 <br /> 7.2.4 Vapor Extraction With Air Sparging . . . . . . . . . . . . . . . 16 <br /> 8.0 RECOMMENDATIONS FOR INTERIM <br /> REMEDIATION AND ADDITIONAL ASSESSMENT . . . . . . . . . . . . . 17 <br /> ' 8.1 Vapor Extraction System . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 <br /> 8.2 Ground Water Pumping . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 <br /> 8.3 Remediation System Permit Requirements and Project Schedule . . . . 18 <br /> 8.4 Additional Investigative Work . . . . . . . . . . . . . . . . . . . . . . . . . 18 <br /> ' 9.0 REMARKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 <br /> 10.0 REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 <br /> APPENDIX A. SOIL AND GROUND WATER SAMPLING TECHNIQUES <br /> APPENDIX B. SOIL BORING LOGS <br /> ' APPENDIX C. SOIL SAMPLE ANALYTICAL RESULTS, APRIL 1992 <br /> APPENDIX D. WELL CONSTRUCTION DETAILS <br /> APPENDIX E. GROUND WATER SAMPLE ANALYTICAL RESULTS, APRIL 1992 <br /> ' APPENDIX F. SOIL SAMPLE ANALYTICAL RESULTS, DECEMBER 1992 <br /> APPENDIX G. GROUND WATER SAMPLE ANALYTICAL RESULTS, DECEMBER 1992 <br /> APPENDIX H. TANK BASIN SOIL SAMPLE ANALYTICAL RESULTS <br /> ' APPENDIX I. PIPING TRENCHES SOIL SAMPLE ANALYTICAL RESULTS <br /> APPENDIX J. SOIL GAS SURVEY ANALYTICAL RESULTS <br /> APPENDIX K. GROUND WATER ANALYTICAL RESULTS, JULY 1993 <br /> ' APPENDIX L. PUMP TEST - RAW DATA AND CALCULATIONS <br /> APPENDIX M. PUMPING TEST ANALYTICAL RESULTS <br /> APPENDIX N. HYDROCARBON EXTRACTION CALCULATIONS <br /> ' ii <br />