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r <br /> O&M and Monitoring <br /> Cost <br /> Annual Duration Net Present <br /> Remedial Option Capital Cost Cost (years) Worth <br /> Option 1 - No-Action $0 $0 none $0 <br /> Option 2 - Limited Action (Groundwater $0 $10,000 5 $50,000 <br /> Monitoring) <br /> Option 3- Limited Action (Groundwater $0 $11,000 5 $87,000 <br /> Monitoring & Pavement Maintenance) ($55,000 <br /> every third <br /> year) <br /> Option 4 - Bioventing $150,000 $32,000 17 $480,000 <br /> ($40,000 <br /> every other <br /> year) <br />' Option 5 - In-Situ Bioremediation $150,000 $65,000 13 $600,000 <br /> ($75,000 <br /> every other <br /> year) <br /> Option 6a - Excavation to Background $2,950,000 $0 none $2,950,000 <br /> Concentration and Off-Site <br /> Treatment/Disposal (Background) <br /> Option 6b- Excavation and Off-Site $1,900,000 $10,000 5 $1,900,000 <br /> Treatment/Disposal (1,000 mg/kg) <br /> Option 7a- Excavation and On-Site $3,700,000 $0 none $3,700,000 <br /> Thermal Treatment (Background) <br /> Option 7b- Excavation and On-Site $2,200,000 $10,000 5 $2,200,000 <br /> Thermal Treatment (1,000 mg/kg) <br /> Mote Cost estimates are rounded from calculations in Appendix B <br />' 6 3 OVERALL SCORE AND RECOMMENDED REMEDIAL OPTION <br />' This section reviews and summarizes the strength and weakness of each option and <br /> qualitatively assesses each option as a supplement to that numerical ranking Table 1 presents <br /> raw and weighted point scores for both cost and non-cost cntena The total score for each <br /> remedial option is also indicated The total score provides a numencal ranking of the nine <br /> Aoptions <br /> SAC 127 10 25 <br /> DAMES &MOORE <br />