Geosynthetic Accreditation Institute


ASTM D4218
Test Method for Carbon Black Content in Polyethylene Compounds and Nonwoven Fabrics (Diaphragm Bursting Strength Tester Method), (07.02)


List of Accredited Laboratories:

  • Lab. #1 - TRI/Environmental
  • Lab. #4 - Geosynthetic Institute
  • Lab. #5 - NTH Consultants, Ltd.
  • Lab. #13 - Precision Geosynthetic Laboratories, CA
  • Lab. #14 - Geotechnics Inc.
  • Lab. #18 - Shaw Environmental & Infrastructure, Inc.
  • Lab. #19 - HTS Inc. Consultants
  • Lab. #26 - Agru America Inc.
  • Lab. #34 - GSE Lining Technology (Richey Road Lab)
  • Lab. #37 - GSE Chile
  • Lab. #38 - SAGEOS/CTT Group
  • Lab. #40 - GSE Lining Technology (Kingstree, SC)
  • Lab. #48 - Tenax Corporation
  • Lab. #49 - Engepol Geossinteticos Ltda.
  • Lab. #50 - Advanced Drainage Systems Inc.
  • Lab. #51 - Solmax International Inc.
  • Lab. #53 - Industries Polytex Ltda.
  • Lab. #55 - Atarfil Geomembranes S.L.
  • Lab. #56 - Industrial Polytex Ltda.
  • Lab. #59 - Firestone Building Products
  • Lab. #60 - Polytex S.A.

[Method List]

[Laboratory List]

[GAI page]