Programs that work for you

"They are rigorous, they’re about making sure our labs, personnel, and test methods conform, that they’re in compliance. They’re independent, not driven by a vendor or a construction company.”

California Department of Transportation

Philip Stolarski, Former Deputy Division Chief, DES-METS & GS 

55+ years of experience
PSP participants
samples shipped per year
laboratory assessments per year
accredited labs


Test Method Added To Scopes of Service

Apr 26, 2023

The following test will be added to the scopes of our proficiency sample, assessment, and accreditation programs: 

  • AASHTO T 111, Standard Method of Test for Mineral Matter or Ash in Asphalt Materials

The following test will be added to the scopes of our assessment and accreditation programs: 

  • ASTM D5334, Standard Test Method for Determination of Thermal Conductivity of Soil and Rock by Thermal Needle Probe Procedure
Laboratories can sign up for these test methods on our website as part of their next laboratory assessment.

If you would like us to add other standards to our scopes, feel free to mention them when submitting feedback, or email your request to our Quality Manager.