CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER H—OCEAN DUMPING (Parts 220–238) > PART 230—SECTION 404(b)(1) GUIDELINES FOR SPECIFICATION OF DISPOSAL SITES FOR DREDGED OR FILL MATERIAL > SUBPART D—Potential Impacts on Biological Characteristics of the Aquatic Ecosystem (§230.30 to §230.32)