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' Harding Lawson Assoclebes <br /> TABLE OF CONTENTS <br /> LIST OF TABLES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <br /> LIST OF ILLUSTRATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <br /> ' I INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> II RESULTS OF PREVIOUS STUDIES. . . . . . . . . . . . . . . . . . . . . . . 3 <br /> ' A. Previous Investigation. . . . . . . . . . . . . . . . . . . . . . . 3 <br /> B. Site Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 <br /> C. Potential Sources of Petroleum Hydrocarbons. . 5 <br /> D. Petroleum Hydrocarbons in Groundwater. . . . . . . . 5 <br /> E. Petroleum Hydrocarbons in Soil. . . . . . . . . . . . . . . 6 <br /> ' III RECOMMENDED CLEAN-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 <br /> IV REMEDIAL ALTERNATIVES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 <br /> ' A. Screening Criteria for Remedial Alternatives. 9 <br /> B. General Soil Remediation Alternatives. . . . . . . . 9 <br /> C. General Groundwater Remediation Alternatives. 11 <br /> D. Soil Vapor Treatment Design Alternatives. . . . . 13 <br /> E. Groundwater Treatment Design Alternatives. . . . 17 <br /> V DESCRIPTION OF SELECTED REMEDIAL ACTION. . . . . . . . . . . 20 <br /> A. General Project Description. . . . . . . . . . . . . . . . . . 20 <br /> B. Effectiveness of Selected Remedial Action. . . . 21 <br /> C. Extraction Trench Design. . . . . . . . . . . . . . . . . . . . . 22 <br /> D. Soil Vapor Extraction System and <br /> ' Treatment Design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 <br /> VI IMPLEMENTATION OF THE SELECTED REMEDIAL ACTION. . . . 25 <br /> A. Scope of Work. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 <br /> B. Schedule. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 <br /> ' VIII TABLES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 <br /> IX ILLUSTRATIONS <br /> DISTRIBUTION <br /> ' 11 <br />