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Ms.Lori Duncan <br /> C A M BRI A September 9,2005 <br /> minimum of 2 years and a maximum of 4 years to meet clean-up levels. The DPE test performed <br /> during June 2004 indicates that DPE is a feasible and effective remedial alternative for this site. <br /> Table 5 presents vapor-phase mass removal data from the DPE test, and Table 6 presents vapor- <br /> phase mass removal data from the DPE test. <br /> Assuming 4 years of DPE operation and using the estimated average annual operational cost,the <br /> total DPE operational cost will be $200,000. Groundwater monitoring is estimated to cost <br /> approximately $5,000 per year. Assuming that 4 years of groundwater monitoring during DPE <br /> and 2 years of groundwater monitoring following DPE is required to reach clean-up levels, the <br /> total groundwater-monitoring cost is $51,000. To verify soil clean-up, confirmation soil borings <br /> would be required. The cost of four confirmation soil borings is estimated at $10,000. The total <br /> © estimated cost for this alternative is$511,000. <br /> Recommendation: The table below presents a comparison of the remedial alternatives evaluated <br /> in this CAP. DPE appears to be the most cost-effective option, and it is the remedial alternative <br /> that most effectively addresses source removal from saturated soils. Therefore, Cambria <br /> recommends implementing DPE at this site. <br /> In-Situ <br /> Alternative MNA Chemical SVE/AS DPE <br /> Oxidation <br /> Poor Moderate to Moderate Good <br /> Effectiveness Poor to Poor <br /> Initial Cost NA $20,000 $200,000 $250,000 <br /> Operational Duration NA 2 years 7 years 4 years <br /> Average Annual NA $20,000 $40,000 $50,000 4 <br /> Operational Cost - 00ZyrSOHIY <br /> Total Operational Cost NA $40,000 $280,000 $200,000 <br /> Annual Groundwater $9,500 $8,500 $8,500 $8,500 <br /> Monitoring Cost <br /> Post-Remediation NA 2 years 3 years 2 years <br /> Groundwater Monitoring <br /> Duration <br /> Total Groundwater 20 years 4 years 10 years 6 years <br /> Monitoring Duration <br /> $190,000 $34,000 $85,000 $51,000 <br /> Total Groundwater <br /> Monitoring Cost <br /> Confirmation Soil Borings $10,000 $10,000 $10,000 $10,000 <br /> Total Cost $200,000 $104,000 $575,000 $511,000 <br /> Recommended X <br /> Alternative <br /> 17 <br />