Test relies on visual inspection of ash to then check soil for toxins, which is ‘unlikely to give a complete picture’ of contamination

A plan to test for toxic dioxins near the site of a February train wreck in East Palestine, Ohio, is flawed and unlikely to find the dangerous substances, independent chemical pollution researchers in the US who reviewed the testing protocol told the Guardian.

Initial soil testing already revealed dioxin levels hundreds of times above the threshold that Environmental Protection Agency scientists have found poses a cancer risk, but that sampling was limited in scope.

Arcadis will largely rely on visual inspections of the ground to find evidence of dioxins, instead of systematically testing soil samples that may contain the compounds, which is standard protocol.

The plan does not say how low the levels of dioxin the company will check for will be.

Testing will only be conducted up to two miles from the accident site when ash has been found up to 20 miles away.

The testing is limited to soil and does not include food or water.