Geosynthetic Accreditation Institute


ASTM D5994
Test Method for Measuring the Core Thickness of Textured Geomembranes, (04.08)


List of Accredited Laboratories:

  • Lab. #1 - TRI/Environmental
  • Lab. #3 - Golder Associates
  • Lab. #4 - Geosynthetic Institute
  • Lab. #5 - NTH
  • Lab. #13 - Precision Geosynthetic Laboratories, CA
  • Lab. #14 - Geotechnics Inc.
  • Lab. #18 - Shaw Environmental & Infrastructure, Inc.
  • Lab. #20 - GeoTesting Express
  • Lab. #26 - Agru America Inc.
  • Lab. #29 - FITI
  • Lab. #34 - GSE Lining Technology, Inc. (Richey Road Lab)
  • Lab. #38 - SAGEOS/CTT Group
  • Lab. #42 - NPUST (GSI-Taiwan)
  • Lab. #43 - Ardaman & Associates
  • Lab. #47 - Precision Geosynthetic Laboratories, TX
  • Lab. #49- Engepol Geossinteticos Ltda.
  • Lab. #51 - Solmax International Inc.
  • Lab. #53 - Industries Polytex Ltda. (Iquique Lab)
  • Lab. #55 - Atarfil Geomembranes S.L.
  • Lab. #56 - Industrial Polytex Ltda. (Santiago Lab)
  • Lab. #60 - Polytex S. A. (Lima Lab)

[Method List]

[Laboratory List]

[GAI page]