What to ask, and why
Will the crew be discreet?
Ask about timing, vehicle markings and parking, and who will be on site. You do not need to be present for the work.
How do I know the waste was disposed of properly?
Ask how it is packaged, which licensed transporter carries it and where it goes. Then ask for the records.
Will insurance cover this?
Some homeowners, renters and commercial policies do, depending on the cause. Ask your agent before work starts.
Can any biohazard company clean a former meth lab?
No. Colorado requires a state-certified contractor, and the Colorado Department of Public Health and Environment publishes the list.
Is the room safe afterward?
Ask what was removed, what was disinfected and with which product, then walk the room yourself before you sign off.