Any person aggrieved by a decision on a claim submitted to the department may request a reconsideration hearing before the department of environmental management administrative adjudication division under the provisions of the regulations of that office and such regulations shall be consistent with the Rhode Island administrative procedures act, chapter 35 of Title 42. Any such decision shall contain a notice of the right to request a hearing and may specify a reasonable time limit, not to exceed twenty-one (21) days, within which said person shall request a hearing. If no such request is made in a timely manner, the said person shall be deemed to have assented to the decision. If a timely request is received, the department of environmental management administrative adjudication division, within a reasonable period of time, shall act upon such request in accordance with the provisions of the Rhode Island administrative procedures act.