![]() ![]() show evidence of conformance to testing procedures and protocols as set forth by specifying agencies or internal QA/QC programs.verify both the testing apparatus and the operator under actual testing conditions.compare individual testing results to a large pool of results from their peers.Participating laboratories have the capability to: The sample program can be utilized as a useful tool for a company, association, or entity to monitor the quality of its services. Currently, the sample program has grown to 18 different sample types ranging from traditional base materials to top-layer preservation treatments. At that time, four basic material types were included in the scope of the program: fine aggregate, coarse aggregate, soil, and asphalt binder. Our Proficiency Sample Program was introduced in March 1966, when samples were initially distributed only to state Department of Transportation and Federal Highway Administration testing laboratories. ![]() In 2017, the PSP became accredited for ISO/IEC 17043:2010, “Conformity assessment-General Requirements for Proficiency Testing”. Samples are distributed to federal, state, independent, commercial, and research testing laboratories. AASHTO re:source’s Proficiency Sample Program (PSP) is the largest construction materials sample program in the world, with a customer base of approximately 3,000 testing laboratories. ![]()
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