Garco Testing is one of the largest and most diverse testing laboratories in Utah. The company has been in business for more than three decades, serving the needs of large and small clients for materials testing, and is AMRL and CCRL accredited. It is accredited by the American Association of State Highway and Transportation Officials Materials Reference Laboratory and the Cement and Concrete Reference Laboratory. Garco performs convention tests on soils, concrete and hot-mix asphalt. The company s advanced capabilities include the testing of backpressure permeability; prequalification tests on epoxy and silicone; and alkali reactivity tests for concrete aggregates. It also operates a completely equipped asphalt cement binder laboratory. Garco is a subsidiary of Granite Construction Company. The company has a location in Salt Lake City.