T.F. Green Airport Improvement Program - FEIS Chapters - PVD

T.F. Green Airport Improvement ProgramEnvironmental Impact Statement and Final Section 4(f) EvaluationTable 5-76 No-Action Alternative: Atmospheric Dispersion Analysis Results (µg/m 3 )PollutantAveragingPeriodNAAQSMaximum Concentration 12015 2020 2025ExceedNAAQSReceptor of MaximumConcentration 22015 2020 2025CO 1 hour 40,000 19,179 17,561 18,275 No 25G 25G 25G8-hour 10,000 5,455 5,357 5,460 No 23G 23G 23GNO2 Annual 100 42 40 40 No 21G 21G 21GPM10 24-hour 150 40 40 40 No 21G 21G 21GPM2.5 24-hour 35 34 34 34 No 21G 21G 21GAnnual 15 12 12 12 No 21G 21G 21GSource: KB Environmental Sciences, Inc., 2011.CO Carbon monoxide.NAAQS National Ambient Air Quality Standards.NO2 Nitrogen dioxide.PM10/2.5 Particulate matter (10 and 2.5 microns in aerodynamic diameter).µg/m 3 micrograms per cubic meter.21G Adjacent to the T.F. Green Airport Main Terminal Building.23G Located along Post Road north of T.F. Green Airport Main Terminal Building.25G Located along Airport Road north of Runway 16.1 Maximum Concentration means second highest predicted concentration (except 24-hour PM10 which is the fourth-highest and 24-hour PM2.5 which is the eighth-highest) using EDMS at all of the receptors analyzed with conservatively high background concentrations added.2 See Figure 4-16 for map of receptor locations.CO “Hot-Spot” AnalysisThe results of the CO “Hot-Spot” modeling are summarized in Table 5-77 and represent the highest CO levels atany of the receptors analyzed. The NAAQS for CO are also shown for comparison. Based on these findings, COlevels in the vicinities of the intersections analyzed (identified in Figure 4-17) are not expected to exceed theNAAQS for CO for any of the years analyzed.Table 5-77 No-Action Alternative: CO “Hot-Spot” Analysis Maximum Concentration Results (µg/m 3 )2015 2,3ID 1 Intersection Location 1 1-Hour 8-Hour2020 2,31-Hour 8-Hour2025 2,31-Hour 8-HourExceedsNAAQS1 Post Road and Lincoln Avenue 10,000 4,400 9,200 4,100 10,300 4,500 No3 Warwick Avenue and Airport Road 10,400 4,700 9,600 4,400 10,700 4,800 No4 Post Road and Airport Road 10,300 4,600 9,400 4,200 10,700 4,800 No5 Post Road and Airport Connector 9,400 4,000 8,500 3,600 9,700 4,200 No6 Post Road and Main Avenue 9,700 4,200 9,100 4,000 10,200 4,500 NoNAAQS for CO 40,000 10,000 40,000 10,000 40,000 10,000Source: KB Environmental Sciences, Inc., 2011.Notes: All six intersections do not apply to all alternatives, as some intersections are related only to elements (i.e., new intersection) of a specific alternative.CO Carbon monoxide.NAAQS National Ambient Air Quality Standard.µg/m 3 micrograms per cubic meter.1 See Figure 4-17 for intersection locations.2 Receptors are about 3 m (10 ft.) from roadway edge-of-pavement and the reported results are the highest CO concentrations at all receptors analyzed.3 Includes 1-Hour background CO concentrations of 6,800, 6,300, and 7,100 µg/m 3 for 2015, 2020, and 2025, respectively, and 8-Hour background concentration of 2,200, 2,000, and 2,300 µg/m 3 for 2015, 2020, and 2025, respectively.Chapter 5 - Environmental Consequences 5-155 July 2011\\mawatr\ev\09228.00\reports\FEIS_Final_July_2011\PVD_CH05_Environmental_Cons_JUL_2011.doc