Geo-synthetic clay liners (GCLs) provides a barrier system in municipal solid waste landfill applications. Federal and some state regulations specify design standards for bottom liner-sand final covers. GCL technology is an alternative that performs at or above standard federal performance levels.
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Geosynthetic Clay Liners Used in Municipal Solid Waste Landfills (PDF)(8 pp, 114 K,
Revised December 2001,
EPA530-F-97-002)
EPA's fact sheet describes new and innovative technologies and products that meet the performance standards of the Criteria for Municipal Solid Waste Landfills (40 CFR Part 258).