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Nestle USA, Inc.—Ripon, CA January 28, 2011 <br /> 2011 Revised Feasibility Study <br /> TABLE OF CONTENTS <br /> List of Acronyms and Abbreviations.......................................................................i <br /> Ripon Study Area Feasibility Study Executive Summary...................................... ii <br /> 1. Introduction..............................................................................................1 <br /> 1.1 Purpose of Report....................................................................................1 <br /> 2 Definitions and Terminology....................................................................2 <br /> 3 Background and Summary of Site Remediation Activities.......................3 <br /> 3.1 Site History ..............................................................................................3 <br /> 3.2 Discovery of Initial Release......................................................................4 <br /> 3.3 Regulatory Oversight...............................................................................4 <br /> 3.4 Remedial Actions Taken To Date ............................................................4 <br /> 3.4.1 Soil Vapor and Soil Remediation.......................................................4 <br /> 3.4.2 Groundwater Remediation ................................................................5 <br /> 3.4.3 Source Area Remediation .................................................................7 <br /> 4 Site Conceptual Model (SCM) .................................................................8 <br /> 4.1 Summary .................................................................................................8 <br /> 4.2 SCM Conclusions ....................................................................................9 <br /> 5 Remedial Action Objectives...................................................................10 <br /> 5.1 Soil.........................................................................................................11 <br /> 5.2 Air ..........................................................................................................11 <br /> 5.3 Groundwater..........................................................................................12 <br /> 5.3.1 Source Removal..............................................................................13 <br /> 5.3.2 Containment....................................................................................13 <br /> 5.3.3 Plume Reduction.............................................................................13 <br /> 6 Distribution of COCs in Groundwater ....................................................13 <br /> 6.1 Historical VOC Release Areas...............................................................13 <br /> 6.1.1 Former Nestle Site (230 Industrial Avenue) ....................................13 <br /> 6.1.2 519 S. Stockton Avenue Site...........................................................14 <br /> 6.1.3 City of Ripon Wastewater Treatment and Disposal Plant (WWTP) ..14 <br /> 6.2 Vertical distribution of VOCs in Groundwater.........................................16 <br /> 6.2.1 Upper Aquifer (25 to 120 feet bgs) ..................................................16 <br /> 6.2.2 Intermediate Aquifer (120 to 190 bgs).............................................16 <br /> 6.2.3 Lower Aquifer (210+ feet bgs).........................................................17 <br /> 7 Regulations, Plans and Policies ............................................................17 <br /> 7.1 Chemical-Specific Requirements...........................................................18 <br /> 7.1.1 COCs in Soil....................................................................................19 <br /> 7.1.2 COCs in Groundwater.....................................................................19 <br /> 7.2 Action-Specific Requirements................................................................20 <br /> 7.3 Location-Specific Requirements ............................................................21 <br /> 8 General Response Actions....................................................................21 <br /> 8.1 No Action ...............................................................................................22 <br /> 8.2 Containment ..........................................................................................22 <br /> 8.3 In-situ Treatment....................................................................................23 <br /> 8.4 Institutional Controls ..............................................................................23 <br /> 9 Identification, Screening and Evaluation of Technology Types.....................24 <br /> 9.1 No Action ...............................................................................................24 <br />