4.4.4.7 Cost -- Alternative 4 The total capital and O&M costs, and NPV for quicklime treatment are shown in Table 4-11 and detailed in Appendix C. Total fixed costs are $929,000. The annual O&M costs are $26,000,000. The NPV has been estimated for Scenario 1 and 2 for a period of 2 and 3 years, respectively, discounted at a rate of 7.5 percent. The NPV of all costs for Alternative 4 including material handling costs and treatment and disposal costs is 150,000,000 and $213,000,000 for Scenario 1 and 2, respectively.