TRI/Environmental, Inc. (TRI) is an independent, third party, geosynthetics firm providing geosynthetics testing and research services to the international community.TRI provides laboratory conformance/verification testing as well as performance related studies.In addition to routine testing in accordance with ASTM, ISO, BS, DIN and GRI test methods, TRI provides interface friction, permeability, creep and stress-rupture, transmissivity, gradient ratio, UV-resistance, chemical resistance, carbonyl end group, molecular weight, plastic pipe and accelerated time-temperature testing.TRI’s personnel are active throughout the world’s standards development organizations and routinely provide short courses, seminars and tailor made training services to those learning about geosynthetics.