Written retesting is available for the following classes: Concrete Field Testing Technician – Grade I (MDOT Class 1) Aggregate Testing Technician- Level 1 (MDOT Class 2) Concrete Strength Testing Technician MDOT Class 3 Concrete Technician For more information, download the Certification Registration and Policy Information form.

MDOT Class 3 Concrete Technician class requires knowledge in the following areas of concrete construction for MDOT projects: Standard Specification for Road and Bridge Construction Proportion of Portland Cement Concrete Mixtures Concrete Mixture Submittals, Eform, Field Verification, and Revisions Special Concrete Mixtures for MDOT Projects This three-day course includes two days of classroom instruction followed