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Overview of Environmental Report for Costco Wheaton Gas Station. Conclusions. Conclusions. Based on standard EPA methods, air quality impacts are far below all EPA National Ambient Air Quality Standards
Not Unprecedented: VOC emissions gasoline marketing Costco in 2013
Comparable to 1.5 M gal/year in 1987 and 3 M gal/year in 1998
Not Unprecedented: VOC emissions gasoline marketing Costco in 2020 Comparable to 1.5 Mgal/year in 1997 and 3 Mgal/year in 2005
Main Report Figure 1-5: Costco Gasoline and Warehouse Area Sources (in red)
Main Report Figure 1-6: East Parking Lot Volume Source (in red)
Main Report Figure 1-4: Costco Gasoline and Warehouse Point Sources (in red)
Main Report Figure 1-7: Example of 18-Vehicle Traffic Queue Lengths at Nearby Road Intersections
This figure was produced from using the raw annual average daily data from Rockville, Beltville, and Arlington accessed from: http://www.epa.gov/airquality/airdata/ad_data_daily.html.
This data included all monitoring locations at each site where annual averages were computed and then a 3-year running averages was used to simulate the NAAQS.
For example, the 3-year running averages for 2010 is the annual average of 2008, 2009 and 2010.
Supplemental Report Figure 4.2: Trends in PM2.5 Concentrations Based on Rockville, Beltsville, and Arlington Monitoring Sites (three-year running averages from 2005 through 2012)
2012 is 10.8 µg/m3
US EPA started regulating PM2.5 in 1997 where NAAQS were 15µg/m³
Supplemental Report Figure 4.3: Annual PM2.5 Design Value Background Concentration from Washington Council of Governments
Summary Table Showing Modeled Rural Concentrations at Pool and School Compared to Average Background Standards (µg/m3) Based on Conservative Rural Land Use (overstates close-in locations)
Urban Concentrations (µg/m³)
Rural Concentrations (µg/m³)
Update to Supplemental Report Figure 3.5 based on Section 4.2 analysis of background values in the Supplemental Report.
Supplemental Report Figure 3.4: Maximum Predicted 8-hour CO Concentrations (μg/m3) for the Closest Residence, the Stephen Knolls School, and the Kenmont Swim and Tennis Center Special Receptors
Existing: contains a small 3-7% incremental vehicle contribution from all roads
[Note: Background for Annual Average NO2 has been updated to 6.8 μg/m3 (see Section 4.0 of Supplemental Report)]
Supplemental Report Figure 3.6: Predicted Annual Average NO2 Concentrations (μg/m3) for the Closest Residence, the Stephen Knolls School, and the Kenmont Swim and Tennis Center Special Receptors
Ordinance of 65 dBA and background of 53 dBA.
Approximate Distance from Gas Pumps / Odor Readings
#1: 210 ft. \ -0.8
#2- 130 ft. \ -0.6
#3- 105 ft. \ -1.2
#4- 200 ft. \ -1.2
#5- 90 ft. \ -0.8
#6- 90 ft. \ -0.2
Approximate Distances from Gas Station Sources to Closest Home
Pumping Area: 290 ft.
Vent- 270 ft.
Fill 1- 260 ft.
Fill 2-245 ft.
Fill 3- 230 ft.
1R.O. McClellan et al. / Regulatory Toxicology and Pharmacology 63 (2012) 225–258
Glystsos, T. et. al., “Characterization of Particulate Matter Concentrations During Controlled Indoor Activities,” Atmospheric Environment,
44 (2010) 1539-1549.
Highest Levels of Ultrafine Particles and Most Toxic are Not Direct Emissions But Photochemically Produced in Atmosphere on a Regional Basis
Direct counts during
Rush hour period
Varma, V. et. al., “Redox Activity of Urban Qauasi-Ultrafine Particles from Primary and Secondary Sources, Atmospheric Environment, 43 (2009) 6360-6368.
“Restaurants, especially fast food and grill outlets that conduct a lot of frying, are also thought to contribute to UFP concentrations. For example, measurements from the California Children’s Health Study reported high UFP levels (similar to those near major freeways) at a monitoring site next to a fast-food restaurant (38) while a study of UFP concentrations in Manchester, England suggested high restaurant density as a predictor of elevated UFP concentrations.”
“A Land Use Regression Model for Ultrafine Particles in Vancouver, Canada » , Rebecca Abernethy, B.Sc., The University of British Columbia, 2008 a thesis submitted in partial fulfillment of the requirements for the degree of master of science in the faculty of graduate studies (Occupational and Environmental Hygiene).
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