Geosynthetic Accreditation Institute


ASTM D4716
Test Method for Determining the (In-Plane) Flow Rate per Unit Width and Hydraulic Transmissivity of a Geosynthetic Using a Constant Head, (04.08)


List of Accredited Laboratories:

  • Lab. #1 - TRI/Environmental
  • Lab #3 - Golder Associates
  • 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. #20 - GeoTesting Express
  • Lab. #26 - Agru America Inc.
  • Lab. #29 - FITI
  • Lab. # 34 - GSE Lining Technology (Richey Road Lab)
  • Lab. #35 - GSE Lining Technology (Hardy Street Lab)
  • Lab. #38 - SAGEOS/CTT Group
  • Lab. #40 - GSE Lining Technology (Kingstree, SC)
  • Lab. #42 - NPUST (GSI-Taiwan)
  • Lab. #45 - Polyfelt Geosynthetics SDN Bhd.
  • Lab. #48 - Tenax Corporation

[Method List]

[Laboratory List]

[GAI page]