HEB, the hypothetical supermarket at the centre of this scenario, is depicted as a mid-to-large regional grocery chain offering a broad range of store-brand products across food, household, and outdoor categories. Like many retailers, HEB contracted the production of its store-brand charcoal to third-party manufacturers, a common industry practice that introduces multiple steps—and potential points of failure—into the supply chain.[5]
Store-brand charcoal is typically produced from hardwood or coconut shell sources through a process of pyrolysis, in which organic material is heated in a low-oxygen environment. Industry standards strictly prohibit the inclusion of petroleum-derived accelerants or synthetic rubber in products labelled as natural or standard charcoal, as such inclusions alter combustion chemistry and introduce toxic by-products.[6] The use of tyre-derived fuel (TDF) in charcoal production is a recognised cost-cutting measure in unregulated or under-regulated manufacturing environments, raising ongoing questions about the adequacy of import and domestic supply inspections.