Proficiency Testing Australia
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PTA now offers Australian participants the opportunity to perform Soils testing in accordance with Australian Standard methods as well as Queensland TMR methods for each Soils Proficiency Testing round. 

As part of Soils Round 27, participants were required to either follow the AS or Queensland TMR methods with one set of results accepted per sample.  

  AS methods Queensland TMR methods
Liquid Limit AS1289.3.1.1 Determination of the liquid limit of a soil – Four Point Casagrande Q104A Liquid limit of soil
Plastic Limit AS1289.3.2.1 Determination of the plastic limit of a soil – Standard method Q105 Plastic limit and plasticity index of soil
Plasticity Index AS1289.3.3.1 Calculation of the plasticity index of a soil Q105 Plastic limit and plasticity index of soil
Linear Shrinkage AS1289.3.4.1 Determination of the linear shrinkage of a soil – Standard method Q106 Linear shrinkage of soil
Particle Size Distribution AS1289.3.6.1 Determination of the particle size distribution of a soil – Standard method of analysis by sieving Q103A Particle size distribution of soil - Wet sieving

Participation in proficiency testing will satisfy the requirements of ISO/IEC 17025:2017 for monitoring your performance by comparison with results of other laboratories. 

Proficiency Testing Australia programs are developed and maintained to international standards. Our programs are accredited to ISO/IEC 17043:2010 “Conformity assessment - General requirements for proficiency testing” by International Accreditation New Zealand (IANZ). 

For more information about the Soils programs, please contact This email address is being protected from spambots. You need JavaScript enabled to view it..