AIRPORTS DESK REFERENCE
c. Air quality issues. Construction activity emissions due to the proposed or preferred alternative must be included as part of any analysis when calculating “direct emissions.
d. Agency letters. To determine the information needs of agencies concerned with construction-related impacts, contact the agencies listed in each of the chapters addressing those resources the proposed construction activities would affect. For example, when construction could degrade nearby water quality, consult with the resource agencies
listed in Chapter 20, Water Quality.
REGULATORY COMPLIANCE PROCEDURES
Environmental documents should refer the reader to other chapters in an EA or EIS that address air quality or water quality in detail. The document’s respective construction impact section should include proof that needed consultation has occurred. In particular, the section on construction impacts should include consultation with EPA or the appropriate State agency (when EPA has an approved NPDES program).
a. General. To avoid repeating discussions and to reduce the bulk of an EA or EIS, the construction section of those documents should refer the reader to the chapters addressing the resources construction would affect (e.g., chapters on noise, air quality, water quality, biotic communities, etc.). The construction chapter, if one is prepared, should present only a general description of impacts that the EA or EIS does not discuss elsewhere. Generally, this would be a summary of specific construction-related impacts, and their expected durations and consequences (i.e., sedimentation increases would/would not smother fish eggs).
b. Mitigation. This construction chapter of the environmental document should discuss the measures the sponsor will take to minimize the impact of construction (e.g., proper muffling of equipment noise, dust control, detention basins, detours, etc.). At a minimum, the environmental document should discuss the specifications described in Item 156 of Advisory Circular (AC) 150/5370-10A, Standards for Specifying Construction of Airports.
DETERMINING IMPACT SIGNIFICANCE.
General. Significant construction impacts would most likely occur when unusual
circumstances exist (e.g., excavating ecologically sensitive areas, construction-induced traffic congestion that would substantially degrade air quality). After completing the above analyses, use the findings and the significance threshold for the resource(s) construction would affect to determine the degree of construction impacts. A significant impact would