The criteria on which clearance is provided will largely depend on the targets and goals developed prior to decontamination. Clearly clearance for particles is worthless when the contaminate was a gas or a toxic chemical.
We can however remove almost all contaminates in a single operation.
We use particle counters and spore traps with laboratory analysis and various scientific levels to provide confidence in results and ensure value for money. Our contractors leave the client with no doubt of the success of decontamination through both visual and scientific verification