No provision of this chapter shall be construed to change any existing regulatory authority under Division 6 (commencing with Section 6001), Division 7 (commencing with Section 8600), or Division 13 (commencing with Section 21000) of the Public Resources Code, or the Porter-Cologne Water Quality Control Act (Division 7 (commencing with Section 13000) of the Water Code), all of which shall remain in full force and effect. Nothing in this chapter shall be construed to remove or otherwise affect certifications, waivers of certifications, waste discharge requirements, or commission or State Lands Commission permits now or hereafter issued for dredging and disposal projects pursuant to this title or any other applicable provision of state or federal law.