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Appendix D: Alternatives Analysis Geosyntec Consultants Rough and Ready Island, Site 47 Port of Stockton California Health and Safety Code Section 25356.1(d): All remedial action plans prepared or approved pursuant to this section shall be based upon all of the following factors: EVALUATION (1)Health and safety risks posed by (2)Effect of contamination upon (3)Effect of alternative (4) Site-specific characteristics, (5) Cost-effectiveness of alternative (6)Potential environmental impacts of CRITERIA the conditions at the site present,future,and probable remedial action measures on including the potential for remedial action measures alternative remedial action measures' beneficial uses of contaminated, the reasonable availability of offsite migration of hazardous polluted,or threatened resources groundwater resources for substances,surface/subsurface present,future,and probable soil,and the hydrogeologic beneficial uses conditions,and preexisting background contamination levels ALTERNATIVE 1 Not compliant Not compliant Not applicable Not compliant Not compliant Not compliant No Action This alternative does not address health Alternative 1 does not effectively reduce No remedy is required at this time Remedy does not address risks Alternative 1 does not effectively reduce Alternative 1 does not achieve the RAOs, and safety risks posed by conditions at the risk of human or ecological exposure to address groundwater at Site 47. posed by hazardous substances in the risk of human or ecological exposure and the potential for public and ecological the site. to COC/COEC-impacted soil. soil at Site 47. to COC/COEC-impacted soil. exposure to COCs/COECs in soil would remain high as there would be no controls in place. ALTERNATIVE 2 Not compliant Not compliant Not applicable Not compliant Not compliant Compliant Existing Durable This alternative does not adequately Alternative 2 reduces the risk of human No remedy is required at this time Remedy does not adequately Alternative 1 does not effectively reduce Alternative 2 poses minimal risk of exposure Cover,Fence,and address health and safety risks posed by exposure to COCs but does not address to address groundwater at Site 47. address risks posed by hazardous the risk of human or ecological exposure due to construction activities during fence Institutional conditions at the site. COEC exposure to most ecological substances in soil at Site 47. to COC/COEC-impacted soil. installation. Controls2 receptors;therefore,this alternative does not satisfy the RAOs. ALTERNATIVE 3 Compliant Compliant Not applicable Compliant Compliant Compliant Excavation with On- Alternative 3 would isolate COC/COEC- Alternative 3 achieves the RAOs by No remedy is required at this time Remedy adequately addresses Alternative 3 cost-effectively achieves Alternative 3 presents H&S hazards during Site Consolidation, impacted soils and would reduce isolating COC/COEC-impacted soils to address groundwater at Site 47. risks posed by hazardous the RAOs by isolating COC/COEC- construction(i.e.,grading and cover Existing and New exposure to humans and ecological from human and ecological receptors. substances in soil at Site 47. impacted soils from human and installation).However,worker and Durable Cover,and receptors. Land use and activities would Regular inspection and maintenance are ecological receptors. community protection will be implemented Institutional be restricted to minimize exposure to required to remain effective. ICs would via H&S (e.g.,appropriate PPE) and Controls2 remaining COCs/COECs in soil. minimize long-term exposure to engineering controls(e.g.,dust suppression remaining COCs/COECs in soil. measures). Page 1 of 2