8.2. SR 11-07-2016 - Laserfiche WebLink

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16. Air: a. Stationary source emissions - Describe the type, sources, quantities and compositions of any emissions from stationary sources such as boilers or exhaust stacks. Include any hazardous air pollutants, criteria pollutants, and any greenhouse gases. Discuss effects to air quality including any sensitive receptors, human health or applicable regulatory criteria. Include a discussion of any methods used assess the project's effect on air quality and the results of that assessment. Identify pollution control equipment and other measures that will be taken to avoid, minimize, or mitigate adverse effects from stationary source emissions. There will be no other stationary source air emissions such as boilers or exhaust stacks. Fugitive dust may be generated from processing equipment, crushing and screening operations. Processing equipment operates under a MPCA Non-metallic Mining General Air Permit and is subject to certain operating standards which include limits on the amount of emissions, opacity standards, establishes minimum moisture content of feed material, fugitive dust control measures, equipment controls, record keeping and reporting requirements. Crushing equipment is fitted with spray bars to mitigate the generation of dust during processing. Processing operations are established at recessed portions of the Site which further reduces fugitive dust emissions associated with the processing equipment. Washplants are not a significant source of fugitive dust emissions. Water used in the washing process saturates the aggregates and eliminates the generation of fugitive dust. Many of the stockpiles will have sufficient moisture content from the washing process to keep fugitive dust levels low during loading operations. The largest source of fugitive dust typically results from haul trucks and other pieces of mining equipment travelling on unpaved haul roads. Fugitive dust from internal haul roads will be controlled by use of dust suppressants such as calcium chloride or by watering. A water truck will be available on-site to water as needed. Fugitive dust from exposed soils and stockpiles will be minimized by and establishing permanent vegetation on perimeter berms and disturbed areas where reclamation grading has been completed and stockpiling materials on the floor of the mine. b. Vehicle emissions - Describe the effect of the project's traffic generation on air emissions. Discuss the project's vehicle-related emissions effect on air quality. Identify measures (e.g. traffic operational improvements, diesel idling minimization plan) that will be taken to minimize or mitigate vehicle-related emissions. The EIS from the Elk River Gravel Mining District addressed vehicle related air emissions. The EIS concluded that emissions of nitrogen oxides and carbon monoxide can result from truck traffic, but such emissions are limited and not considered a potential problem due to the size and the dispersion potential of the area.16 16 Elk River Mining District Environmental Impact Statement July, 14 1994 Environmental Assessment Worksheet Page 23 Elk River Sand and Gravel Mines:Tiller Corporation and Max Steininger, Inc.