They are taking their sweet time to even BEGIN testing.... That article below, from March 2, 2023, clearly states that the EPA is only in the planning stage to create a "reliable test" to correctly measure the toxin in the soil. The last paragraph says it all:

"EPA is also currently reviewing a draft plan by Norfolk Southern to develop a dioxin “fingerprint” for soil sampling. EPA anticipates that developing a dioxin fingerprint for East Palestine will require use of certified laboratories that can perform high-resolution gas chromatography and mass spectrometry to identify various isomers of dioxins.  If this dioxin fingerprint can be developed with reliable methodologies, it will help EPA determine whether any dioxin particularly from the train derailment and controlled burn impacted the local environment."

https://www.epa.gov/newsreleases/epa-requires-norfolk-southern-sample-dioxins-east-palestine

It's all too little, too late