(1) A variance request must be on a department-provided affidavit completed by a licensed construction blaster.

(2) A variance will be granted or denied in writing to the requestor for variance after a determination is made by the bureau based on (1). If the variance is approved, restrictions and time of variance must be stated if applicable; and if denied, reasons for denial must be stated. The letter must be signed by the bureau chief or the bureau chief's designated representative.