Va. Code Ann. § 62.1-248.2

In granting a permit pursuant to this chapter, the Department shall provide in writing a clear and concise statement of the legal basis, scientific rationale, and justification for the decision reached. When the decision of the Department is to deny a permit pursuant to this chapter, the Department shall, in consultation with legal counsel, provide a clear and concise statement explaining the reason for the denial, the scientific justification for the same, and how the Department's decision is in compliance with applicable laws and regulations. Copies of the decision, certified by the Director, shall be mailed by certified mail to the permittee or applicant.