A Southern California woman who was held at a Phoenix airport four years ago after refusing to have her breast milk X-rayed has reached a settlement with the Transportation Security Administration.

Stacey Armato, who filed a lawsuit in U.S. District Court in Phoenix, said Wednesday that TSA officials have tentatively offered her $75,000, along with promises to retrain agents and clarify its guidelines on screening breast milk.

Armato, of Hermosa Beach, says TSA agents at Phoenix Sky Harbor International Airport in 2010 detained her for nearly 40 minutes. She says they would not comply with her request to have the milk screened outside the X-ray machine.

Current TSA rules classify breast milk as a medically required liquid.

A TSA spokeswoman did not immediately return a message seeking comment.