Suchergebnisse

The reliability of a treatment process is addressed in terms of achieving a regulatory effluent concentration standard and the design safety factors associated with the treatment process. This methodology was then appliedto two aqueous hazardous waste treatment processes: packed tower aeration and activated sludge (aerobic) biological treatment. The designs achieving 95 percent reliability were compared with those designs based on conventional practice to determine their patterns of conservatism. Scoping‐level treatment costs were also related to reliability levels for these treatment processes. The results indicate that the reliability levels for the physicalkhemical treatment process (packed tower aeration) based on the deterministic safety factors range from 80 percent to over 99 percent, whereas those for the biological treatment process range from near 0 percent to over 99 percent, depending on the compound evaluated. Increases in reliability per unit increase in treatment costs are most pronounced at lower reliability levels(less than about 80 percent) than at the higher reliability levels (greaterthan 90 percent, indicating a point of diminishing returns. Additional research focused on process parameters that presently contain large uncertainties may reduce those uncertainties, with attending increases in the reliability levels of the treatment processes.

A study of the legacy of nuclear contamination in the Soviet Union. It gives the location and characteristics of the accumulated radioactive material and wastes by each sector, from ore and mining to use and disposal. It describes types of storage, capacity and utilization, age and location. It gives information on the territories and locations contaminated, by normal operations and by accidents, from which strategic plans for remediation can be formulated

This work is the first systematic attempt to measure the impact of the Voting Rights Act of 1965, commonly regarded as the most effective civil rights legislation of the century. Marshaling a wealth of detailed evidence, the contributors to this volume show how blacks and Mexican Americans in the South, along with the Justice Department, have used the act and the U.S. Constitution to overcome the resistance of white officials to minority mobilization. The book tells the story of the black struggle for equal political participation in eight core southern states from the end of the Civil War to the 1980s--with special emphasis on the period since 1965. The contributors use a variety of quantitative methods to show how the act dramatically increased black registration and black and Mexican-American office holding. They also explain modern voting rights law as it pertains to minority citizens, discussing important legal cases and giving numerous examples of how the law is applied. Destined to become a standard source of information on the history of the Voting Rights Act, Quiet Revolution in the South has implications for the controversies that are sure to continue over the direction in which the voting rights of American ethnic minorities have evolved since the 1960s