Material Service Testing and Material Service Testing & Laboratories is a full service construction materials testing laboratory and engineering consulting firm serving northern Illinois. We provide a full range of Field Testing & Inspection Services, Laboratory Testing, and Engineering Services. Our highly qualified and experienced staff of engineers, field and laboratory technicians are IDOT and ACI trained and certified to provide the highest quality services to our clients. MST maintains a fully equipped Laboratory that is IDOT approved for Hot Mix Asphalt, Portland Cement Concrete, Aggregates and Soils. Our Laboratory is also certified by U. S. Army Corps of Engineers, American Standard for Testing Materials (ASTM), American Association of State Highway Transportation Officials (AASHTO), Cement and Concrete Reference Laboratory (CCRL), and AASHTO Materials Reference Laboratory (AMRL).