environmental assessment us border patrol, tucson sector

123456789101112131415161718192021222324252627282930313233343536373839404142434445Another BMP that would be considered is to schedule clearing and grubbing activities outsidethe nesting season, negating the requirement for preconstruction nesting bird surveys.Shields would be installed on lights to prevent background lighting. Lights would also beinstalled such that the direction of illumination is downward toward the station facilities, andfugitive illumination beyond the site boundaries would be less than 2 lumens.Cultural Resources:There are no identified cultural resource sites that would be directly impacted by constructionactivities under the Preferred Alternative. An Unanticipated Discoveries Plan will be developedand implemented if ground disturbance activities uncover previously unidentified culturalresource material. If unmarked human burials are discovered during construction, work will stopin the immediate vicinity, the remains will be protected, and the local cultural resourcesrepresentative and the Arizona SHPO will be notified as soon as possible. The location of theunmarked human burial will be documented and the provisions of the Native American GravesProtection and Repatriation Act (NAGPRA) will be implemented, including consultation withNative American tribes.Air Quality:Mitigation measures will include suitable fencing to restrict traffic within the project area inorder to reduce soil disturbance. Soil watering will be utilized to minimize airborne particulatematter created during construction activities. Bare ground will be covered with hay or straw tolessen wind erosion between facility construction and landscaping. After the construction iscompleted, all areas with vehicle traffic will be paved to reduce the potential for fugitive dust,and landscaping will be designed to prevent or lessen wind fugitive dust creation. Additionally,all construction equipment and vehicles will be kept in good operating condition to minimizeexhaust emissions.Water Resources:Standard construction procedures will be implemented to minimize the potential for erosion andsedimentation during construction. All work will cease during heavy rains and will not resumeuntil conditions are suitable for the movement of equipment and material. Because the impactarea is greater than 1 acre, as part of the National Pollutant Discharge Elimination System(NPDES) permit process, a SWPPP and Notice of Intent will be submitted to the U.S.Environmental Protection Agency (USEPA)/Arizona Department of Environmental Quality(AZDEQ) prior to the start of construction. Sedimentation and pollution of surface waters byfuels, oils, and lubricants will be minimized through the implementation of the SWPPP. Theconstruction of the proposed FOB would incorporate the proper stormwater retention measures,including a retention pond. All fuel tanks will be double-walled to prevent leaks from enteringthe groundwater. Proper wastewater disposal will be accomplished by using an engineered, onsitewastewater treatment system.Noise:During the construction phase, short-term noise impacts are anticipated. All Occupational Safetyand Health Administration (OSHA) requirements will be followed. To lessen noise impacts onFONSI - 5