Geosynthetic Accreditation Institute

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ASTM D1777
Test Method for Measuring Thickness of Textile Materials (not for use with geotextiles or geomembranes) (07.01)

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List of Accredited Laboratories:

• Lab. #1 - TRI/Environmental
• Lab. #4 - Geosynthetic Institute
• Lab. #5 - NTH Consultants, Ltd.
• Lab. #6 - GeoSystems Consultants
• Lab. #9 - SI Geosolutions (Performance Nonwoven Division)
• Lab. #11 - STS Consultants
• Lab. #13 - Precision Geosynthetics Laboratories
• Lab. #14 - Geotechnics, Inc.
• Lab. #18 - Shaw Environmental & Infrastructure, Inc.
• Lab. #20 - GeoTesting Express
• Lab. #29 - FITI
• Lab. #38 - SAGEOS/CTT Group
• Lab. #43 - Ardaman & Associates

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[Method List]

[Laboratory List]

[GAI page]