FLEX: An expert system for reviewing the chemical resistance of flexible-membrane liners for waste management

Technical Report · Wed Jan 01 00:00:00 EST 1992

OSTI ID:7161919

Landreth, R E

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).

• Research Organization: Environmental Protection Agency, Cincinnati, OH (United States). Risk Reduction Engineering Lab.
• OSTI ID: 7161919
• Report Number(s): PB-93-106706/XAB; EPA-600/A-92/201
• Resource Relation: Other Information: International Symposium on Environmental Geotechnology (2nd), Tongui University, Shanghai, China. See also PB88-249578
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
HAZARDOUS MATERIALS
WASTE MANAGEMENT
MEMBRANES
PERFORMANCE TESTING
EXPERT SYSTEMS
GROUND WATER
LAND POLLUTION CONTROL
LEACHING
LINERS
PHYSICAL PROPERTIES
SOILS
US EPA
WATER POLLUTION CONTROL
CONTROL
DISSOLUTION
HYDROGEN COMPOUNDS
MANAGEMENT
MATERIALS
NATIONAL ORGANIZATIONS
OXYGEN COMPOUNDS
POLLUTION CONTROL
SEPARATION PROCESSES
TESTING
US ORGANIZATIONS
WATER
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)