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REVISED PROJECT DESCRIPTION AND ENVIRONMENTAL IMPACT ASSESSMENT (EIA) REGISTRATION FOR THE NEPISIGUIT FALLS GENERATING STATION MODIFICATION AND REHABILITATION PROJECT Table 4.1 Potential Interactions of the Project with the Environment Project Phase, or Activities/Physical Works Associated with the Project Atmospheric Environment Water Resources Aquatic Environment Terrestrial Environment Wetland Environment Land Use and Economy Heritage Resources Current Use of Land and Resources for Traditional Purposes by Aboriginal Persons Construction 1 1 2 1 0 1 1 1 1 1 Operation 0 0 0 0 0 1 0 0 0 1 Decommissioning and 1 1 1 1 0 1 1 1 1 0 Abandonment KEY: 0 = No interaction. The environmental effects are not significant and are not considered further in this report. 1 = Interaction occurs; however, based on past experience and professional judgment the interaction would not result in a significant environmental effect, even without mitigation; or interaction would not be significant due to application of codified environmental protection practices that are known to effectively mitigate the predicted environmental effects. The environmental effects are not significant and are not considered further in this report. 2 = Interaction could result in an environmental effect of concern even with mitigation; the potential environmental effects are considered further in this report. Road Transportation Effects of the Environment on the Project 4.2.2 VECS with No Interaction, or No Significant Interaction with the Project The VECs below have been identified as having either no interaction, or no significant interaction, with the Project: • Atmospheric Environment; • Water Resources; • Terrestrial Environment; • Wetland Environment; • Land Use and Economy; • Heritage Resources; • Current Use of Land and Resources for Traditional Purposes by Aboriginal Persons; • Road Transportation; and • Effects of the Environment on the Project. Page 34 June 15, 2011
REVISED PROJECT DESCRIPTION AND ENVIRONMENTAL IMPACT ASSESSMENT (EIA) REGISTRATION FOR THE NEPISIGUIT FALLS GENERATING STATION MODIFICATION AND REHABILITATION PROJECT Further information on the justification for the 0 or 1 rankings is provided for each VEC below. 4.2.2.1 Atmospheric Environment The Atmospheric Environment is characterized by Air Quality (ambient air quality and air contaminant emissions) and Sound Quality. Operation has been ranked as 0 in Table 4.1 because there is no interaction between this phase of the Project and the Atmospheric Environment under normal operating conditions. Emissions to the atmosphere (i.e., dust, emissions from combustion engines, and sound) during Operation will be returned to pre-Project conditions which were established in 1921 when the NFGS was constructed and will be relative and typical of the area (e.g., water falling over the dam). Construction and Decommissioning and Abandonment have been ranked as 1 in Table 4.1 due to the potential change in Air Quality and Sound Quality which would occur during these phases of the Project. During Construction and Decommissioning and Abandonment, emissions of air contaminants to the environment may occur primarily from the operation of construction equipment associated with the Project (e.g., emissions from the combustion of fuel and dust). Particulate matter emissions may be associated with earth moving activities. Emissions generated during Construction are expected to be relatively low, at times intermittent, and of short duration (limited to the construction period June 1 through September 30, 2012). Overall emissions from heavy equipment during construction activities are not expected to exceed ambient air quality standards for New Brunswick. Equipment will be maintained in good working order to ensure that emissions are within manufacturer’s performance specifications. The emission of particulate matter (i.e., dust) during Construction would be primarily restricted to the PDA where heavy machinery will be mobile. Dust will be managed effectively in dry periods using standard dust suppression best management practices (e.g., water) on the exposed earth in the PDA including the access road and parking lot adjacent to the NFGS. Emissions from the Project will be short term, intermittent over the 4-month construction period, and will not have any substantive interactions with Air Quality. Construction will involve the use of some heavy equipment. No blasting or pile driving is required for this Project, although some drilling may be necessary for the installation of dowels, post-tension anchors, and rebar in the spillway dam. Increased Sound Quality from the Project is anticipated to be relatively low and typical of a construction site (e.g., backup alarms on heavy machinery, increased traffic, and heavy machinery engines). Heavy equipment (e.g., trucks, backhoes and other equipment) required for Construction will be equipped with mufflers and be maintained in good working order to reduce unnecessary sound emission. Though sound emissions may be heard during Construction at residential properties within the LAA, Construction has been scheduled during daytime hours and over a relatively short 4-month construction period. In the event that an June 15, 2011 Page 35
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DOCUMENT "A" Attached to ALT 31667'
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