I agree with Barry.

While I have lifted corners of carpet (usually to check for hardwood flooring), I have many times torn some of the fibers in the process. There have been times when I was not able to lift the corner.

When asked about lifting carpet, I usually tell my clients that they can borrow my pliers, but I'm not going to be doing the lifting.

The age of the house alone will put one on notice that there is a potential for having asbestos containing building materials present (and lead paint). The are many types of flooring besides the 9x9's that contain asbestos, so just seeing some vinyl flooring that is NOT 9x9 does not mean it is asbestos free.
JF