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LIST OF FIGURES <br /> Figure 1: Rough and Ready Island Location Map <br /> Figure 2: Remediation Program Sites <br /> Figure 3: Site 47 Overview and Layout <br /> Figure 4: Project Sierra and Site 47 Overview <br /> Figure 5: Summary of Previous Investigations at Site 47 <br /> Figure 6a: Arsenic Concentrations in Soil <br /> Figure 6b: Arsenic Concentrations in Soil (Northwestern Extent) <br /> Figure 7: Lead Concentrations in Soil <br /> Figure 8a: Benzo(a)anthracene Concentrations in Soil <br /> Figure 8b: Benzo(a)pyrene Concentrations in Soil <br /> Figure 8c: Benzo(b)fluoranthene Concentrations in Soil <br /> Figure 8d: Dibenzo(a,h)anthracene Concentrations in Soil <br /> Figure 8e: Indeno(1,2,3-cd)pyrene Concentrations in Soil <br /> Figure 9: Sediment Sample Locations <br /> Figure 10a: Conceptual Site Model—Human Health Risk Assessment <br /> Figure 10b: Conceptual Site Model—Ecological Risk Assessment <br /> Figure 11: Remedial Boundary and Areas Requiring Institutional Controls <br /> Figure 12: Alternative 2: Existing Durable Cover, Fence, and ICs <br /> Figure 13: Alternative 3: Excavation and On-Site Consolidation, Existing and New Durable <br /> Cover, and ICs <br /> Figure 14: Alternative 4: Excavation with Off-Site Disposal, Existing Durable Cover, and <br /> ICs <br /> Figure 15: Alternative 5: Expanded Excavation with On-Site Consolidation, Existing <br /> Durable Cover, Expanded New Durable Cover, and ICs <br /> Figure l 6: Proposed Modifications of Drainage Channels for Alternative 5 <br /> Figure 17: Preliminary Implementation Schedule for Site 47 Remediation <br /> Site 47 RAP for Soil iv October 2023 <br />