(a) No person shall install any leaching component of an onsite wastewater treatment system or seepage pit or any sewer outfall within the area adjaent to a freshwater wetland without first obtaining an agency permit.

(b) Where, in its review of an application made pursuant to this section, the agency finds that the activity proposed will not impinge upon or otherwise substantially affect the wetland, it may treat the application as a request for determination of jurisdiction pursuant to sections 571.1 and 571.5 of these regulations and issue its determination that no permit is required.