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Item-by-item guidance Chapter <br /> 16.Air <br /> This item is divided into three sections: stationary source emissions,vehicle emissions,and dust/odors. The <br /> regulatory authorities for these three types of air emissions are different so measures to control or mitigate <br /> environmental effects may be different in each section. <br /> a. Stationary source emissions <br /> This response should cover all sources of air emissions other than traffic,odor sources and construction- <br /> phase dust.The most common sources of such emissions are boilers and industrial processes.The level of <br /> detail and the degree of sophistication of the analysis should be commensurate with the magnitude of the <br /> emissions and their likely impacts on air quality. Where emissions will be great or contain several or <br /> specific regulated air pollutants,quantitative estimates derived from generally accepted air quality models <br /> may be necessary. <br /> Any hazardous or criteria air pollutants as well as greenhouse gases must be specifically addressed. <br /> Proposers are advised to contact the MPCA Air Quality staff to determine which specific air pollutants <br /> need to be included as part of the EAW.Judgment must be exercised in determining the level of <br /> information needed for the pollutants carbon dioxide,methane and nitrous oxide from the project in <br /> question. <br /> This item includes fugitive dust except construction-phase dust,which is addressed in response to Item <br /> 16.c.Fugitive dust is defined as"particulate matter uncontaminated with industrial emissions that <br /> becomes airborne due either to the force of wind or man's activity," such as dust generated by traffic on <br /> unpaved roads or parking areas,or dust from storage piles.The locations of,and distances to, sensitive <br /> receptors should be given. Proposed mitigation measures should be identified. <br /> Air emission sources frequently require air quality permits from the MPCA and applications for such <br /> permits may require extensive information. In these cases,information in the EAW may be based on <br /> information being developed for the air permit. Proposers are advised to consult with the MPCA Air <br /> Quality staff regarding air permit requirements prior to preparing the EAW data. <br /> b. Vehicle emissions <br /> The level of detail needed here depends on the magnitude of the traffic congestion due to the project as <br /> described in Item 18. When there is no reason to expect traffic congestion,or that existing congestion will <br /> not be noticeably worse due to the project,indicate that it will not cause any significant decrease in air <br /> quality.However,if EAW Item 18 indicates that the project will substantially worsen traffic conditions, <br /> an estimate of the air quality impact of this congestion must be prepared. In addition, any project with a <br /> parking capacity of 2,000 or more parking spaces may have to conduct a detailed air quality analysis. For <br /> transportation projects,in certain circumstances,a detailed carbon monoxide air quality modeling analysis <br /> may be required.The proposer is advised to consult with MPCA Air Quality staff regarding the need for <br /> this analysis. <br /> c. Dust and Odors <br /> This section is meant to address potential health-related conditions as well as nuisance conditions from <br /> dust and odors. The distance and relationship between the proposed project and potential receptors is an <br /> important aspect of assessing these types of environmental effects. <br /> i. Dust.Wind-blown dust from construction,demolition,haul roads and other activities should be <br /> described here. Identify minimization or mitigation measures for any generation of dust that is <br /> greater than routinely expected during project construction or operation. <br /> ii. Odors. Identify any strong or potentially offensive odors and identify the locations and distances <br /> Environmental Quality Board EAW Guidelines—October 2013 38 <br />