Record Display for the EPA National Library Catalog

RECORD NUMBER: 4819 OF 4942

OLS Field Name OLS Field Data
Main Title Validation Methods for Chemical Exposure and Hazard Assessment Models.
Author Burns, L. A. ;
CORP Author Environmental Research Lab., Athens, GA.
Year Published 1985
Report Number EPA/600/D-85/297;
Stock Number PB86-140571
Additional Subjects Hazardous materials ; Mathematical models ; Chemical compounds ; Environmental surveys ; Assessments ; Performance evaluation ; Exposure ; Regulations ; Safety ; Ozone ; Ecology ; Public health ; Economic analysis ; Risk ; Toxicology ; Toxic substances
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB86-140571 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 28p
Abstract
Mathematical models and computer simulation codes designed to aid in hazard assessment for environmental protection must be verified and validated before they can be used with confidence in a decision-making or priority-setting context. Operational validation, or full-scale testing via an 'appeal to Nature' in realworld situations, is usually the most ambiguous and least satisfactory part of the validation process. In most published studies, objective validity criteria are lacking and evaluation of the model is wholly subjective. This need not be the case, however, because acceptable model performance can usually be defined using relatively uncomplicated accuracy and precision criteria. Under these conditions, objective statistical tests can be formulated and executed to provide unambiguous proofs of validity in individual case studies. Such validation cannot, of course, demonstrate the global validity of a model; they merely provide a single instance of a failure to invalidate. The accumulation of a series of such validations, however, can give model users confidence in the general reliability and veracity of their decision tools.