Report of project testing services

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AET Project No. 20-06374— Page 4 of 8 • The conditions and dimensions of the various formwork. • That the proper number, size, spacing, and lap of the reinforcing steel were provided. • That proper concrete cover and support was provided between the reinforcing steel and the formwork and/or the ground surface. • That the reinforcing steel was substantially free of rust, scale, dirt, ice or other deleterious materials which will reduce adhesion with the concrete. Based on the results of our observations, it is our opinion that the reinforcing steel placed in the observed structural elements was in substantial compliance with the current structural drawings present at the site. AET does not perfonn surveying services, therefore, our observations of the reinforcing steel were based on the positioning of the formwork by the contractor. We are not responsib]e for the exact locations of the formwork. CONCRETE TESTING We performed testing of the plastic concrete as it was being placed in some of the structural elements of the building. These services were performed on a will-call basis between the dates of September 26, 2006 and April 19, 2007. Our services included the following: • Measuring the slump of the plastic concrete. • Measuring the percentage of entrained and entrapped air of the plastic concrete. • Measuring the temperature of the plastic concrete. • Casting compression test cylinders. A]1 testing was performed in general accordance with current ASTM procedures. The results of the on-site testing were presented in our Reports of Plastic Concrete Testing, which were issued under separate cover. The results of our tests generally satisfied the project specifications.