Record Display for the EPA National Library Catalog


Main Title FLEX: An Expert System for Reviewing the Chemical Resistance of Flexible Membrane Liners for Waste Management.
Author Landreth, R. E. ;
CORP Author Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
Publisher 1992
Year Published 1992
Report Number EPA/600/A-92/201;
Stock Number PB93-106706
Additional Subjects Linings ; Waste management ; Expert systems ; Chemical resistance ; Materials tests ; Physical properties ; Performance evaluation ; Leaching ; Exposure ; Membranes ; Land pollution control ; Computer systems programs ; Polyvinyl chloride ; Polyethylene ; FLEX system ; Geosynthetic materials ; EPA method 9090 ; High density polyethylene ; Chlorosulfonated polyethylene
Library Call Number Additional Info Location Last
NTIS  PB93-106706 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 13p
A computerized, expert system (FLEX) has been developed that will assess the chemical resistance of flexible membrane liners (FML) used at waste management facilities. These FML's must be chemically resistant to the waste, its leachates, or both. To demonstrate chemical resistancy, the United States Environmental Protection Agency (USEPA) requires the use of Method 9090, wherein the physical properties of the FML are evaluated after various exposure times. After the Method 9090 data are assembled, a reviewer is then responsible for assessing the data and reaching a conclusion about the probability that a proposed FML material will be resistant to the waste/leachate. Knowledgeable judgments as to the chemical resistance of FML require a multitude of considerations. Because such knowledge is not generally available within the USEPA, a computerized, expert system was sought to provide guidance in the review of Method 9090 data. The liner materials of interest were high-density polyethylene (HDPE), polyvinyl chloride (PVC), and chlorosulfonated polyethylene (CSPE).