A probe has been launched by the Environment Agency into whether a recycling firm abided by waste storage rules, following a fire which destroyed their site in Smethwick.
The blaze at the Jayplas recycling plant was tackled by more than 200 firefighters at its peak, and destroyed 100,000 bales of plastic.
The Environment Agency has now launched an investigation into whether the companybreached any of its recycling permits rules regarding waste storage.
It will also be looking at the waste industry as a whole, to see whether it needs to tighten the rules on fire prevention measures.
CCTV footage showed it was a Chinese lantern that sparked the fire at the Dartmouth Road site.
Following the fire, Sandwell Council leader Darren Cooper said he would be asking questions about how much material was actually on the site.
He said: “You do have to question whether it is safe to have all that material on site.
“It is not clear how much recycled material is being stored there.”