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GEF <br /> GENESIS ENGINEERING&REDEVELOPMENT <br /> Arcadis (2012)also performed exposure scenarios to calculate the estimated cancer risk and <br /> non-cancer health hazards. Based on a residential exposure scenario for adults and children <br /> and using the maximum concentrations on Site,the estimated cancer risk is 2X 10-4 and the <br /> non-cancer hazard index is 3.8. Tables showing calculations for cancer risk and hazard index <br /> from Arcadis (2012) are included in Appendix A. <br /> 3.0 REMEDIAL ACTION OBJECTIVES <br /> Remedial Action Objectives ("RAO")have been developed based on the COPC,type of <br /> media, potential exposure pathway(s), and remediation goal. The RAO are intended to <br /> establish acceptable exposure levels that are protective of human health and the environment. <br /> 3.1 Media and COPC <br /> The media of concern at the Site is soil. The total volume of soil requiring excavation and <br /> disposal is estimated at approximately 700 cubic yards ("yd3"). As shown in the table below, <br /> the excavation volume for each AOC was estimated by multiplying the surface area of <br /> impacts(as shown on Figure 3) by the depth to which soils are impacted. Of the thirteen <br /> AOC, seven have been characterized with samples that delineate the depth of impacts to soil. <br /> In the remaining six AOC, samples have only been analyzed between 0-0.5 feet bgs. In the <br /> AOC without vertical characterization,the assumed depth of impacts used in volume <br /> calculations is shown on the table below. <br /> Former Gordon Research Company Property 8 of 20 <br /> Removal Action Workplan <br /> June 2017 <br />