The Materials Testing Laboratory insures that the materials used on County projects meet the required specifications. Laboratory personnel inspect the asphalt and concrete plants and oversee the batching of material. Samples of the material are delivered to the Laboratory for further testing.

During the construction season, laboratory personnel will do tension and compression testing; numerous soil tests, some requiring the use of nuclear gauges; and perform tests on a number of items including fence fabric and posts, concrete precast items and topsoil.