Section 250-RICR-150-10-4.12 - Revision of an Approved PlanA. An approved Plan shall not be revised in any manner without the prior submission of the proposed revision to the Director for review and approval. The Director may also require at any time that an approved Plan be revised for reasons which include, but are not limited to, a determination that there has been a substantial change or alteration in the Wastewater Treatment Facility's capacity, treatment process, equipment or effluent or influent wastewater characteristics.B. Revisions to an approved Plan will generally be approved by issuing a "modified Order of Approval." Minor revisions may be approved by the Director as Standard Operating Procedures. Once the Director approves a Standard Operating Procedure it shall be considered an addendum of the approved Plan, and as such must be adhered to in accordance with § 4.5 of this Part.250 R.I. Code R. 250-RICR-150-10-4.12