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Table 7: Alternatives Analysis Geosyntec Consultants
<br /> Rough and Ready Island, Site 47
<br /> Port of Stockton
<br /> EVALUATION Overall Protection of Human Health Compliance with Long-Term Effectiveness and Short-Term Effectiveness Reduction of Toxicity, Implementability Cost'
<br /> CRITERIA and the Environment ARARs Permanence Mobility,and Volume
<br /> Through Treatment
<br /> ALTERNATIVE 1 No Not Applicable Low Low Low High Not Applicable
<br /> No Action This alternative provides no protection No Action Alternative 1 is not effective in the long Alternative 1 does not achieve the RAOs, Provides no treatment to Since no remedial actions are taken,this alternative is easily There are no
<br /> of human health and the environment and alternative does not term. and the potential for public and ecological reduce toxicity,mobility,or implemented. costs associated
<br /> does not satisfy the RAOs. require selection of exposure to COCs/COECs in soil would volume of contaminants. with this
<br /> cleanup standards or remain high as there would be no controls in alternative.
<br /> the requirement to place.
<br /> meet ARARs.
<br /> ALTERNATIVE 2 No Yes Low Low Low High Low
<br /> Existing Durable This alternative is not adequately Alternative 2 is Alternative 2 reduces the risk of human Alternative 2 poses minimal risk of exposure Provides no treatment to Since minimal action is taken,this alternative is easily
<br /> Cover,Fence,and protective of human health and the expected to comply exposure to COCs but does not address due to construction activities during fence reduce toxicity,mobility,or implemented.
<br /> Institutional environment because some ecological with all identified COEC exposure to most ecological installation. volume of contaminants.
<br /> Controls2 receptors would remain exposed to chemical-, receptors;therefore,this alternative does
<br /> COECs. location-,and action- not satisfy the RAOs.
<br /> specific ARARs.
<br /> ALTERNATIVE 3 Yes Yes High High Low Medium Medium
<br /> Excavation with On- Alternative 3 would isolate COC/COEC- Alternative 3 is Alternative 3 achieves the RAOs by Alternative 3 presents H&S hazards during Provides no treatment to Alternative 3 uses standard construction equipment,labor,
<br /> Site Consolidation, impacted soils and would reduce expected to comply isolating COC/COEC-impacted soils construction(i.e.,grading and cover reduce toxicity,mobility,or and materials,which are readily available.Engineering
<br /> Existing and New exposure to humans and ecological with all identified from human and ecological receptors. installation).However,worker and volume of contaminants. controls arc required to manage erosion,stormwater runoff,
<br /> Durable Cover,and receptors.Land use and activities would chemical-, Regular inspection and maintenance are community protection will be implemented dust,and worker exposure to COCs/COECs.Access around
<br /> Institutional be restricted to minimize exposure to location-,and action- required to remain effective. ICs would via H&S(e.g.,appropriate PPE)and the railroad running through the northwest corner of Site 47
<br /> Controls2 remaining COCs/COECs in soil. specific ARARs. minimize long-term exposure to engineering controls(e.g.,dust suppression would need to be coordinated with the operator,Central
<br /> remaining COCs/COECs in soil. measures).RAOs would be achieved California Traction Company.Required regulatory
<br /> immediately following remedy construction. coordination and plans to implement the remedy should not
<br /> cause delays.
<br /> ALTERNATIVE 4 Yes Yes High Medium Low Medium High
<br /> Excavation(to 2 Alternative 4 would remove impacted Alternative 4 is Alternative 4 achieves the RAOs by Alternative 4 presents H&S hazards during Provides no treatment to Alternative 4 uses standard construction equipment,labor,
<br /> feet)with Off-Site soils from Site 47 to a depth of 2 feet bgs expected to comply removing COC/COEC-impacted soils to construction(i.e.,excavation and staging of reduce toxicity,mobility,or and materials,which are readily available.Engineering
<br /> Disposal(Backfilled and would cover remaining COC/COEC- with all of the a depth of 2 feet below current ground soils for off-site transport).However, volume of contaminants. controls are required to manage erosion,stormwater runoff,
<br /> with Clean Fill), impacted soils beneath clean backfill identified chemical-, surface.Regular inspection and worker and community protection will be dust,and worker exposure to COCs/COECs.Access around
<br /> Existing Durable material.Land use and activities would location-,and action- maintenance are required to remain implemented via H&S(e.g.,appropriate the railroad running through the northwest corner of Site 47
<br /> Cover,and be restricted to minimize exposure to specific ARARs. effective.ICs would minimize long-term PPE)and engineering controls(e.g.,dust would need to be coordinated with the operator,Central
<br /> Institutional remaining COCs/COECs in soil. exposure to remaining COCs/COECs in suppression measures).Excavation and off- California Traction Company.Required regulatory
<br /> Controls2 soil. site transport of COC/COEC-impacted soil coordination and plans to implement the remedy should not
<br /> pose increased short-term risks to cause delays.
<br /> community and has greater environmental
<br /> impact.RAOs would be achieved
<br /> immediately following remedy construction.
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