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No, it's not a lawsuit. Again, you don't have a lawsuit against the company right now. You have an OSHA complaint, and if anything is done, it will be OSHA fining the employer and correcting the behavior, but there isn't a lawsuit (meaning no potential of any award) for you.
You would have a lawsuit only if, following the OSHA complaint, the employer retaliates against you for filing it.
The OSHA complaint is just a means of stopping unsafe practices.