ABSTRACT
The diversity of waste types and desirable service lives for facilities under various regulatory programs are summarized in Tables 1.1 and 1.2, respectively.
Estimation of the long-term deterioration pattern of barriers is necessary to improve the reliability of estimates of long-term contaminant release source terms for input into human health and ecological risk assessments, as well as facility monitoring and maintenance planning. Monitoring of barrier performance provides useful but inadequate data for performance predictions, because of limited field experience with barriers of various configurations in many environments, and because epochal events such as floods and earthquakes produce transient effects that cause deviations from performance patterns.
