4.4.3.7 Cost -- Alternative 3 The total capital and O&M costs, and NPV for DAVES treatment are shown in Table 4-10 and detailed in Appendix C. Total fixed costs are $260,000. The annual O&M costs are $3,410,000. The NPV has been estimated for Scenario 1 and 2 for a period of 7 and 10 years, respectively, discounted at a rate of 7.5 percent. The NPV of all costs for Alternative 3 including material handling costs and treatment and disposal costs is $85,000,000 and $117,000,000 for Scenario 1 and 2, respectively.