• Original Chemical: Indicates the starting chemical that the facility replaced. Generally, this is the chemical for which a Form R was filed.
• Substitute Chemical: Indicates the substitute chemical or process used to replace the original solvent chemical. For facilities which reported more than one substitute, the additional substitute is listed in Substitute Chemical 2.
• Comments: If you are searching substitutions for a specific application or process, consider searching the comment column for terms like cleaning or coating.