If it is determined by the executive director that a city has met the criteria set forth in §216.22(a) of this title (relating to Applicability) or the executive director is requiring the city to amend an existing water pollution control and abatement program, the executive director shall notify the city. This notice shall specify the following:(1) the basis for the executive director's determination;(A) that the city meets the criteria set forth in §216.22(a) of this title; or(B) that the city's existing Water Pollution Control and Abatement Program should be amended;(2) that the executive director may undertake additional water quality assessments and studies in the impacted area as set out in §216.24 of this title (relating to Water Quality Assessments and Studies);(3) that the city may undertake additional water quality assessments and studies in the impacted area within its jurisdiction which comply with quality assurance requirements of the executive director; and(4) the time period (not to exceed five years) within which the city may try to correct the problem. The executive director may extend this time period when new or additional information or circumstances warrant such an extension.