The Blue Line Reconstruction was a top-to-bottom rehabilitation project for one of Chicago's rapid transit lines, running from Chicago's western city limit to downtown Chicago, and then northwest to O'Hare Airport, outside of Chicago. The rehabilitation included new track installation, electrical transmission equipment, and new station construction and platform rehabilitation.

SPAAN Tech provided quality assurance and quality control (QA/QC) functions for the construction management team, including the development of the QA/QC plan. The job was to ensure that all federal rail standards were adhered to and that the materials used in all aspects of the project met contract specifications. SPAAN Tech also provided construction inspection services.