Identification of wetlands and delineation of their boundaries pursuant to this chapter shall be done in accordance with the approved federal wetland delineation manual and applicable regional supplements. Review copies are available at the department of ecology headquarters and regional offices. Links to the online versions are accessible through the department of ecology wetlands web page. Copies of the original published manual are available through the U.S. Army Corps of Engineers National Technical Information Service (phone 703-487-4650).