For the U.S. Navy, INTERRA provided Construction Quality Assurance services for a Naval Hospital in Great Lakes, Illinois. The work included foundation bearing inspection services with on site concrete and laboratory testing of concrete. In addition, structural steel, fire proofing, masonry, and pavement testing was provided. For concrete the services consisted of air content, slump, temperature, and strength. INTERRA made cylinder specimens which were transported to the INTERRA laboratory.

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