(1) Two copies of said water pollution control and abatement plan will be submitted to ecology for review. Within thirty days of receipt ecology will approve or reject said plan in writing. Upon ecology approval a public hearing will be scheduled for a date within thirty days of said approval. This hearing will be preceded by the appropriate notices as set forth in RCW 42.32.010. Such hearing may be continued from time to time, and at the termination thereof, ecology may reject the plan proposed or adopt it with such modifications as it shall deem proper. Said adoption will take place within sixty days of the termination of the hearing. One copy of the water pollution control and abatement plan adopted by ecology will be stamped with the approval stamp of ecology and returned to the agency which submitted said plan with instructions to notify all involved entities within fifteen days.

(2) Ecology will consider for adoption plans for sub-areas within a basin if it shall deem such adoption desirable or necessary to prevent undue delay in the construction of urgently needed water pollution control facilities. In all such cases the sub-area plan should be developed according to WAC 372-68-060 and should be submitted through the basin plan-coordinating agency if possible.