The administrative review proceeding began with the issuance of a Notification Letter to the Individual. See 10 C.F.R. § 710.21. The letter informed the Individual that information in the possession of the DOE created a substantial doubt concerning her eligibility for a security clearance. Specifically, the Local Security Office (LSO) characterized this information as indicating that the Individual had engaged in unusual conduct which brought her honesty, trustworthiness, and reliability into question, and been diagnosed by a psychologist with alcohol abuse.