Five Washington State Patrol troopers have filed tort claims against the agency, claiming officials knew and didn’t do enough about the risk of carbon monoxide poisoning from faulty exhaust systems in their patrol cars.

A lawyer filed the $1 million claims, which could lead to future lawsuits.

In July Labor and Industries installed carbon monoxide detectors in the vehicles, which were triggered 50 times through the end of August for unsafe exposure to carbon monoxide.

An inspection report says mechanics found exhaust problems related to unsealed holes from police equipment installed by third parties.

A patrol spokeswoman says none of the troopers are forced to drive those specific vehicles and that the agency is working to fix the problem.