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2020_07-28_PWETCpacket
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2020_07-28_PWETCpacket
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7/24/2020 3:46:57 PM
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Public Works Commission
Commission/Committee - Document Type
Agenda/Packet
Commission/Committee - Meeting Date
7/28/2020
Commission/Committee - Meeting Type
Regular
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No stationary source emissions are anticipated; therefore, no mitigation is required. <br />b. Vehicle Emissions - Describe the effect of the project's traffic generation on air emissions. <br />Discuss the project's vehicle -related emissions effect on air quality. Identify measures <br />(e.g., traffic operational improvements, diesel idling minimization plan) that will be taken <br />to minimize or mitigate vehicle -related emissions. <br />Motor vehicles emit a variety of air pollutants including carbon monoxide (CO), <br />hydrocarbons, nitrogen oxides, and particulates. The primary pollutant of concern is CO, <br />which is a byproduct of the combustion process of motor vehicles. CO concentrations <br />are highest where vehicles idle for extended periods of time. For this reason, CO <br />concentrations are generally highest in vicinity of signalized intersections where vehicles <br />are delayed and emitting CO. Generally, concentrations approaching state air quality <br />standards are found within about 100 feet of a roadway source. Further from the road, <br />the CO in the air is dispersed by the wind such that concentrations rapidly decrease. <br />MnDOT has developed a screening method designed to identify intersections that will <br />not cause a CO impact above state standards. MnDOT has demonstrated that even the <br />10 highest traffic volume intersections in the Twin Cities do not experience CO impacts. <br />Therefore, intersections with traffic volumes lower than these 10 highest intersections will <br />not cause a CO impact above state standards. MnDOT's screening method <br />demonstrates that intersections with total daily approaching traffic volumes below 82,300 <br />vehicles per day will not have the potential for causing CO air pollution problems. None <br />of the intersections in the study area exceed the criteria that would lead to a violation of <br />the air quality standards. Table 7 identifies the approaching volumes for the surrounding <br />roadways <br />Table 7: Approaching Volumes for Surrounding Roadways <br />Intersection <br />Fairview Avenue & TH 36 EB Ramps <br />•.• Long Term <br />SAT Peak Hour <br />2745 <br />D. <br />27,450 <br />Fairview Avenue & TH 36 WB Ramps <br />3,995 <br />39,950 <br />Fairview Avenue & Mall Entrance #1 <br />3,840 <br />38,400 <br />Fairview Avenue & County Road B2 <br />4,165 <br />41,650 <br />County Road B2 & Mall Entrance #2 <br />2,960 <br />29,600 <br />County Road B2 & Mall Entrance #3 <br />3,235 <br />32,350 <br />County Road B2 & Snelling Avenue SB Ramps <br />3,295 <br />32,950 <br />County Road B2 & Snelling Avenue NB Ramps <br />1,760 <br />17,600 <br />c. Dust and Odors - Describe sources, characteristics, duration, quantities, and intensity of <br />dust and odors generated during project construction and operation. (Fugitive dust may <br />be discussed under Item 16a). Discuss the effect of dust and odors in the vicinity of the <br />project including nearby sensitive receptors and qualify of life. Identify measures that will <br />be taken to minimize or mitigate the effects of dust and odors. <br />The project would generate temporary fugitive dust emissions during construction. These <br />emissions would be controlled by watering, sprinkling, or calcium chloride application, as <br />appropriate or as prevailing weather and soil conditions dictate. Dust emissions are not <br />anticipated during operations as all surfaces will either be impervious or vegetated. <br />Rosedale Center EAW 16 February 2020 <br />
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