This Standard sets out a method for the quantitative determination of the particle size distribution in a soil from a coarse sand size down, using a hydrometer for particles finer than the 75 µm sieve. The method as described is not applicable if less than 10% of the material passes the 75 µm sieve as measured in AS 1289.3.6.1. If used in combination with AS 1289.3.6.2 this Method covers the determination of particles finer than the 75 µm sieve.