Indianapolis Testing Labs
Chicago Testing Labs
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Chicago Testing Laboratory represents one of the world’s premier resources for the testing and inspection of construction materials, including:  asphalt and asphalt materials, liquids, aggregates, concrete and soils. In addition, CTL provides consulting services in the fields of Geotechnical Engineering, Construction Inspection and other specialty areas.

CTL is dedicated to meeting your needs with highly qualified laboratory and field personnel. CTL offers hundreds of years of combined expertise along with an unparalleled depth of professional experience. CTL is a full-service provider who can offer you a complete range of testing, inspection, training, consulting and research capabilities, in an expanded service area (see map).