Upon a timely petition under par. (a), the administering agency shall give the petitioner reasonable notice and opportunity for a review. The administering agency shall render its decision as soon as possible after the review and shall send by 1st class mail a certified copy of its decision to the petitioner. The administering agency shall deny a petition for a review or shall refuse to grant relief if the petitioner does any of the following: 1.
(1)#
Withdraws the petition in writing.
(2)#
Abandons the petition. Abandonment occurs if the petitioner fails to appear in person or by representative at a scheduled review without good cause, as defined by the department by rule.