How long must an old catalytic converter be kept for disposal regulations?

The requirement to keep an old catalytic converter for disposal regulations is set at 15 days. This timeframe is crucial for several reasons. First, it allows for adequate documentation and tracking of the part, ensuring that it can be properly accounted for in compliance with environmental regulations and standards. The retention period also provides time for the necessary inspections or validations that might be needed before disposal.

Retention of the catalytic converter for 15 days helps to ensure that all paperwork is completed, and any potential recycling or recovery of precious metals can be organized without hasty actions that might violate regulatory standards. This duration is positioned to balance efficient waste management while adhering to legal obligations aimed at protecting the environment.

While other durations may seem reasonable, they do not align with the specific regulations established for this purpose, which is why the 15-day period stands out as the correct answer in the context of automotive waste management and regulatory compliance.