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Table 6:Technology Screening ceosyntee Consultants <br /> Rough and Ready Island,Site 47 <br /> Port of Stockton <br /> Effectiveness and Permanence Implementability <br /> Overall Protection of Human Health Compliance with Reduction of Toxicity,Mobility,or Screening <br /> Technology Description of Technology and the Environment ARARs Volume Through Treatment Relative Cost Outcome <br /> g Short-Term Long-Term Advantages Disadvantages <br /> In-Situ Heat is applied to the 1)Protective for PAHs and total DDT Compliant with chemical 1)Reduction of PAH and total DDT 1)Protection of community and workers to 1)Demonstrated effectiveness for soils impacted by PAHs 1)Technology can be 1)Wide distribution of COCs/COECs <br /> Thermal subsurface,which either through destruction of contaminant specific,action-specific, volume through irreversible be implemented via health and safety and total DDT. implemented using standard in Site 47 soils will require large <br /> Treatment destroys contaminants or mass. and location-specific destruction.As a result,PAH and total controls during treatment. 2)Likely ineffective for metals. equipment. implementation footprint. <br /> mobilizes them for transport 2)Potential impact to human health due ARARs. DDT toxicity and mobility are also 2)Potential off-gases generated during 2)Bench and pilot tests necessary for High due to <br /> via vacuum extraction for to off-gases generated during operation reduced. operation will require treatment. design. large Not Retained <br /> treatment at the surface. (requires treatment). 2)No reduction of toxicity,mobility,or 3)RAOs may not be met with respect to 3)Significant infrastructure required implementation due to high cost <br /> 3)Not protective of ecological receptors volume of metals at Site 47. metals in soils. for implementation. footprint and and ineffective <br /> as some COECs(i.e.,metals)remain in- 4)Requires significant protective infrastructure to treatment for <br /> place at the surface. measures to mitigate potential off- implement metals. <br /> gases. remedy. <br /> 5)Post-implementation sampling <br /> necessary to confirm effectiveness. <br /> Abbreviations: <br /> Agencies=DTSC and CVRWQCB N/A=not applicable <br /> ARAR=Applicable,or Relevant and Appropriate Requirement PAH=polycyclic aromatic hydrocarbon <br /> COC=contaminant of concern QA/QC=quality assurance and quality control <br /> COEC=contaminant of ecological concern RAOs=remedial action objectives <br /> CVRWQCB=Central Valley Regional Water Quality Control Board <br /> DDT=Dichlorodiphenyltrichloroethane <br /> DTSC=California Environmental Protection Agency,Department of Toxic Substances Control <br /> Page 3 of 3 <br />