Severance agreement arrived, need a second opinion after 6 years as a welding apprentice

I was offered 6 weeks of severance after 6 years as a welding apprentice, and I have a few days to sign. I am in Portland, in case local advice matters. I do not want to leave money on the table. Did anyone negotiate and succeed?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.