Precision Geosynthetic International (PGLI) is an accredited testing laboratory of the City of Los Angeles; a member of the Geosynthetic Research Institute (GRI) and a GRI-LAP Accredited Laboratory. PGLI is one of the few laboratories accredited to test and certify new materials for:

•City of Los Angeles Waterproofing Certification

•City of Los Angeles Methane Barriers Certification

•ASTM E1745/ASTM E154 Standard Specification for Water Vapor Retarders