In situations like this, bids are opened in public. I imagine that LM Sauvé realized that its bid was much lower than the others. Actually, it was $1.7 million lower, not $2 million.
The project team and the people responsible for the contract asked Paul Sauvé to meet with them. Each detail of the bid was checked line by line to make sure that nothing had been left out or that no basic error had been made. The company's explanations were seen to be satisfactory because you have to remember that the company was its own masonry subcontractor, and was very competent in that area. That gave it a big advantage.