(a) The department may administratively convert the hazardous waste facilities permit or grant of interim status of a hazardous waste management unit authorized pursuant to such a permit or grant of interim status to authorization to operate under a permit-by-rule, pursuant to the department’s regulations, a grant of conditional authorization or conditional exemption pursuant to this chapter, if the hazardous waste management facility meets both of the following criteria:

1. (1) The unit is not required to obtain a permit under the federal act.
2. (2) The unit met all applicable conditions and criteria for authorization under a permit-by-rule pursuant to the department’s regulations, or a grant of conditional authorization or conditional exemption pursuant to this chapter, on the effective date of the statute or regulation which made the unit eligible for authorization under a permit-by-rule, conditional authorization, or conditional exemption.

(c) The owner or operator of a hazardous waste management unit that desires to convert the grant of authorization for the hazardous waste management unit from a hazardous waste facilities permit or grant of interim status pursuant to subdivision (a) shall transmit all of the following documents to the department:

1. (1) A demonstration that the unit is not required to obtain a permit under the federal act.
2. (2) A demonstration that the unit is eligible for authorization under a permit-by-rule pursuant to the department’s regulations, or a grant of conditional authorization or conditional exemption pursuant to this chapter.
3. (3) If applicable, a complete and valid notification for the unit for which an authorization status conversion is requested, which complies with the applicable notification requirements for operating under a permit-by-rule, or a grant of conditional authorization or conditional exemption.

4. (4) One of the following documents:

   1. (A) A written request, signed in accordance with the regulations adopted by the department pertaining to signatories to permit application and reports, to administratively remove the unit from the existing hazardous waste facilities permit or grant of interim status.
   2. (B) A written request, signed in accordance with the regulations adopted by the department pertaining to signatories to permit applications and reports, to administratively terminate the existing hazardous waste facilities permit or grant of interim status if the unit subject to the permit or grant of interim status is the only unit at the facility authorized by that permit or grant of interim status.

(d) Upon receipt of a notification, if applicable, and a request pursuant to paragraphs (3) and (4) of subdivision (c), the department shall do all of the following:

1. (1) Either approve the request in writing if the department concurs with the demonstrations submitted pursuant to paragraphs (1) and (2) of subdivision (c) and the notification submitted pursuant to paragraph (3) of subdivision (c) is complete and valid; or deny the request in writing if the department does not concur with the demonstrations submitted pursuant to paragraphs (1) and (2) of subdivision (c) or the notification submitted pursuant to paragraph (3) of subdivision (c) is incomplete or invalid.

2. (2) If not all activities conducted at a facility pursuant to a hazardous waste facilities permit or grant of interim status are eligible for conversion, administratively terminate the authorization under the hazardous waste facilities permit or grant of interim status for the unit or units at the facility conducting treatment activities eligible to be authorized under a permit-by-rule pursuant to the department’s regulations, or a grant of conditional authorization or conditional exemption pursuant to this chapter, by doing all of the following:

   1. (A) Placing a letter in the facility permit file maintained by the department acknowledging the change in authorization.
   2. (B) Notifying the facility, in writing, that the authorization under the permit or grant of interim status for the treatment units in question will be terminated when the authorization under a permit-by-rule pursuant to the department’s regulations, or a grant of conditional authorization or conditional exemption pursuant to this chapter, becomes effective.
   3. (C) Notifying all persons on the facility mailing list of the change in the authorization status of the units being converted.

3. (3) If the hazardous waste facilities permit or grant of interim status of a facility is being completely converted to authorization under a permit-by-rule pursuant to the department’s regulations, or a grant of conditional authorization or conditional exemption pursuant to this chapter, administratively terminate the permit or grant of interim status by doing all of the following:

   1. (A) Placing a letter in the facility permit file maintained by the department administratively terminating the permit upon the effective date of authorization for all affected units under a permit-by-rule pursuant to the department’s regulations, or a grant of conditional authorization or conditional exemption pursuant to this chapter.
   2. (B) Notifying the facility, in writing, that the permit or grant of interim status will be terminated when the authorization under a permit-by-rule pursuant to the department’s regulations, or a grant of conditional authorization or conditional exemption pursuant to this chapter, becomes effective.
   3. (C) Notifying all persons on the facility mailing list of the termination of the hazardous waste facilities permit or grant of interim status.