ASTM D5199-12 pdf free.Standard Test Method for Measuring the Nominal Thickness of Geosynthetics. ASTM D5199 covers the measurement of the nominal thickness of geosynthetics, except textured and some structured geomembranes where the entire surface of the presser foot cannot come into complete contact with the geosynthetic surface. This test method does not provide thickness values for geosynthetics under variable normal...