Accreditation / Certification

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Quartet Engineers has been accredited by the American Association for Laboratory Accreditation (A2LA) to meet the requirements of ISO/IEC 17025:2017. We are qualified to perform various tests on Concrete, Soils, Rock, Aggregates, Hot-Mix-Asphalt, Grout, and Mortar for the Harris County, City of Houston, Port Authority, and Texas Department of Transportation (TXDOT). Our scope of accreditation includes D-3740, C-1077, and E-329 for soils and rock, aggregates, and concrete.
Additionally, Quartet Engineers has participated continuously in the Cement and Concrete Reference Laboratory (CCRL) program for concrete and aggregate testing. We are also involved in the American Association of State Highway and Transportation Officials resource (AASHTO re:source) Proficiency Sample Program for soils and aggregate testing, further demonstrating our commitment to quality testing and accuracy.
Quartet Engineers is also DBE, MBE, SBE, HUB certified multi-discipline laboratory and engineering firm.