For this current IDOT project, INTERRA performs Quality Assurance services which includes the inspection and testing of soils. For this project, testing and inspection of concrete is being performed in the field. Concrete tests include slump, air, cylinders, and temperature. Witness, verify, and perform split sampling with contractor’s QC personnel. Daily inspection and testing of materials include compaction of backfill materials, troubleshooting any field issues and reporting the issues to the materials coordinator. Other services include the monitoring of proof rolls, soil compaction, and Dynamic Cone Penetrometer (DCP) testing.