Solving this dilemma was delegated to the already existing MSDGC Trenchless Technology Committee (TTC).
Ensuring that quality materials would be installed by qualified contractors was the first step in developing MSDGC's current QA/QC procedure.
The TTC evaluates this information to make a general assessment of the contractor's ability to effectively manage and complete projects of the magnitude undertaken by MSDGC to avoid falling short of the annual Consent Decree requirements.
Overhauling the specification addressed the other half of updating MSDGC's QA/QC plan for CIPP contracts.
MSDGC had abandoned the notion that lining can address I/I problems on a wide scale due to service lateral issues and a high percentage of combined sewers, so the primary focus naturally evolved towards structural rehabilitation.
Contractors were able to increase their productivity, and MSDGC saw a noticeable decrease in unit pricing--all without compromising finished product integrity and its long-term performance in the collection system.