Can you clarify who is confirming partner participation in ‘Additional Attachment C: Formal Project Partners?

For each participating partnering organization, there should be a letter provided by the partnering agency that confirms that organization’s participation in the project. That letter can be addressed to either the lead applicant or EPA, and the content is standardized. We just need to see something on that organization’s/agency’s letterhead, confirming that they are participating, that is signed by the AOR or Tribal leadership, etc.