## Supplement to Technical Support Document for Approval and Promulgation of Air

Quality Implementation Plans; District of Columbia, Maryland and Virginia;Attainment Demonstration for the 1997 8

-Hour Ozone National Ambient Air Quality Standard for the Washington, DC

-MD

-VA Moderate Nonattainment Area (Docket ID#: EPA

-R03

-OAR

2013

-0132).



# AppendixB

–Monitor Values Reports: Attachment B

-1: Year: 2011

–Generated: August 22, 2014. (Ozone_monitor_report_2011.pdf)

### Page 1 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2011 Exceptional Events: Included (if any)

Page 1 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2011 Exceptional Events: Included (if any)

Duration Description=1 HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

1 HOUR 8570 0.101 0.099 0.096 0.095 0 0.00 214 209 98 0 None 1 110010041 420 34th Street N.E.,Washington, Dc 20019 Washington District of Columbia DC 03

1 HOUR 8434 0.107 0.101 0.101 0.096 0 0.00 214 204 95 0 None 1 110010043 2500 1st Street, N.W. Washington Dc Washington District of Columbia DC 03

1 HOUR 5031 0.109 0.107 0.107 0.095 0 0.00 214 210 98 2 None 1 240090011 350 Stafford Road Prince Frederick Calvert MD 03

1 HOUR 4964 0.108 0.098 0.096 0.095 0 0.00 214 206 96 0 None 1 240170010 14320 Oaks Road Charlotte Hall Charles MD 03

1 HOUR 5117 0.09 0.089 0.084 0.083 0 0.00 214 214 100 0 None 1 240210037 Frederick County Airport ,180 E Airport Drive Frederick Frederick MD 03

1 HOUR 5084 0.097 0.097 0.096 0.092 0 0.00 214 211 99 2 None 1 240313001 Lathrop E. Smith Environmental Education Center, 5110 Meadowside Lane Rockville Montgomery MD 03

1 HOUR 7989 0.114 0.109 0.093 0.093 0 0.00 214 190 89 3 None 1 240330030 Howard University'S Beltsville Laboratory, 12003 Old Baltimore Pike Beltsville Prince George's MD 03

1 HOUR 5107 0.11 0.11 0.106 0.105 0 0.00 214 213 100 1 None 1 240338003 Pg County Equestrian Center, 14900 Pennsylvania Ave. Greater Upper Marlboro Prince

George's MD 03

1 HOUR 5840 0.113 0.102 0.097 0.095 0 0.00 214 185 86 3 None 1 240339991 Powder Mill Rd, Laurel, Md 20708 Not in a city Prince George's MD 03

1 HOUR 5104 0.109 0.103 0.102 0.098 0 0.00 214 212 99 2 None 1 510130020 S 18th And Hayes St Arlington Arlington VA 03

### Page 2 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2011 Exceptional Events: Included (if any)

Duration Description=1 HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

1 HOUR 5115 0.11 0.106 0.1 0.096 0 0.00 214 212 99 2 None 1 510590030 Sta. 46-B9, Lee Park, Telegraph Road Groveton Fairfax VA 03

1 HOUR 5095 0.077 0.076 0.074 0.069 0 0.00 214 213 100 1 None 1 510610002 Rt651 C Phelps Wildlife Management Area Not in a city Fauquier VA 03

1 HOUR 5104 0.098 0.086 0.085 0.084 0 0.00 214 212 99 2 None 1 511071005 38-I, Broad Run High School, Ashburn Not in a city Loudoun VA 03

1 HOUR 5007 0.083 0.08 0.078 0.077 0 0.00 214 209 98 0 None 1 511530009 James S. Long Park Not in a city Prince William VA 03

1 HOUR 5107 0.097 0.097 0.085 0.084 0 0.00 214 214 100 0 None 1 511790001 Widewater Elem. Sch., Den Rich Road Aquia Harbour Stafford VA 03

1 HOUR 5054 0.109 0.103 0.102 0.096 0 0.00 214 212 99 2 None 1 515100009 517 N Saint Asaph St, Alexandria Health Alexandria Alexandria City VA 03

### Page 3 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2011 Exceptional Events: Included (if any)

Page 3 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2011 Exceptional Events: Included (if any)

Duration Description=8-HR RUN AVG BEGIN HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

8-HR RUN AVG BEGIN HOUR 8620 0.085 0.084 0.082 0.08 6 6.20 214 207 97 0 None 1 110010041 420 34th Street N.E.,Washington, Dc 20019 Washington District of Columbia DC 03

8-HR RUN AVG BEGIN HOUR 8466 0.092 0.087 0.086 0.085 11 11.60 214 203 95 0 None 1 110010043 2500 1st Street, N.W. Washington Dc Washington District of Columbia DC 03

8-HR RUN AVG BEGIN HOUR 5023 0.093 0.092 0.087 0.082 6 6.20 214 206 96 0 None 1 240090011 350 Stafford Road Prince Frederick Calvert MD 03

8-HR RUN AVG BEGIN HOUR 4957 0.098 0.087 0.086 0.085 7 7.30 214 205 96 0 None 1 240170010 14320 Oaks Road Charlotte Hall Charles MD 03

8-HR RUN AVG BEGIN HOUR 5121 0.085 0.082 0.078 0.077 6 6.00 214 214 100 0 None 1 240210037 Frederick County Airport ,180 E Airport Drive Frederick Frederick MD 03

8-HR RUN AVG BEGIN HOUR 5079 0.088 0.085 0.082 0.081 5 5.10 214 210 98 0 None 1 240313001 Lathrop E. Smith Environmental Education Center, 5110 Meadowside Lane Rockville Montgomery MD 03

8-HR RUN AVG BEGIN HOUR 7946 0.094 0.091 0.088 0.083 7 8.20 214 182 85 0 None 1 240330030 Howard University'S Beltsville Laboratory, 12003 Old Baltimore Pike Beltsville Prince George's MD 03

### Page 4 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2011 Exceptional Events: Included (if any)

Duration Description=8-HR RUN AVG BEGIN HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

8-HR RUN AVG BEGIN HOUR 5087 0.095 0.092 0.09 0.086 14 14.10 214 213 100 0 None 1 240338003 Pg County Equestrian Center, 14900 Pennsylvania Ave. Greater Upper Marlboro Prince

George's MD 03

8-HR RUN AVG BEGIN HOUR 5845 0.092 0.086 0.085 0.084 7 8.30 214 181 85 0 None 1 240339991 Powder Mill Rd, Laurel, Md 20708 Not in a city Prince George's MD 03

8-HR RUN AVG BEGIN HOUR 5101 0.1 0.093 0.089 0.087 8 8.10 214 212 99 0 None 1 510130020 S 18th And Hayes St Arlington Arlington VA 03

8-HR RUN AVG BEGIN HOUR 5119 0.099 0.096 0.09 0.087 11 11.10 214 212 99 0 None 1 510590030 Sta. 46-B9, Lee Park, Telegraph Road Groveton Fairfax VA 03

8-HR RUN AVG BEGIN HOUR 5118 0.067 0.065 0.065 0.063 0 0.00 214 212 99 0 None 1 510610002 Rt651 C Phelps Wildlife Management Area Not in a city Fauquier VA 03

8-HR RUN AVG BEGIN HOUR 5113 0.086 0.081 0.08 0.075 3 3.00 214 212 99 0 None 1 511071005 38-I, Broad Run High School, Ashburn Not in a city Loudoun VA 03

8-HR RUN AVG BEGIN HOUR 5017 0.079 0.073 0.071 0.071 1 1.00 214 208 97 0 None 1 511530009 James S. Long Park Not in a city Prince William VA 03

### Page 5 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2011 Exceptional Events: Included (if any)

Duration Description=8-HR RUN AVG BEGIN HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

8-HR RUN AVG BEGIN HOUR 5127 0.086 0.08 0.075 0.074 2 2.00 214 214 100 0 None 1 511790001 Widewater Elem. Sch., Den Rich Road Aquia Harbour Stafford VA 03

8-HR RUN AVG BEGIN HOUR 5065 0.1 0.095 0.09 0.084 7 7.10 214 212 99 0 None 1 515100009 517 N Saint Asaph St, Alexandria Health Alexandria Alexandria City VA 03

## Supplement to Technical Support Document for Approval and Promulgation of Air

Quality Implementation Plans; District of Columbia, Maryland and Virginia; Attainment Demonstration for the 1997 8

-Hour Ozone National Ambient Air Quality Standard for the Washington, DC

-MD

-VA Moderate Nonattainment Area (Docket ID#: EPA

-R03

-OAR

-2013

-0132).



# AppendixB

–Monitor Values Reports: Attachment B

-2: Year: 2012

–Generated: August 22, 2014. (Ozone_monitor_report_2012.pdf)

### Page 1 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2012 Exceptional Events: Included (if any)

Page 1 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2012 Exceptional Events: Included (if any)

Duration Description=1 HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

1 HOUR 8620 0.102 0.097 0.09 0.089 0 0.00 214 211 99 1 None 1 110010041 420 34th Street N.E.,Washington, Dc 20019 Washington District of Columbia DC 03

1 HOUR 8681 0.109 0.098 0.098 0.097 0 0.00 214 214 100 0 None 1 110010043 2500 1st Street, N.W. Washington Dc Washington District of Columbia DC 03

1 HOUR 5024 0.125 0.105 0.094 0.092 1 1.00 214 210 98 1 None 1 240090011 350 Stafford Road Prince Frederick Calvert MD 03

1 HOUR 4772 0.117 0.103 0.1 0.093 0 0.00 214 194 91 0 None 1 240170010 14320 Oaks Road Charlotte Hall Charles MD 03

1 HOUR 4747 0.097 0.09 0.087 0.085 0 0.00 214 199 93 0 None 1 240210037 Frederick County Airport ,180 E Airport Drive Frederick Frederick MD 03

1 HOUR 5012 0.1 0.088 0.086 0.084 0 0.00 214 211 99 0 None 1 240313001 Lathrop E. Smith Environmental Education Center, 5110 Meadowside Lane Rockville Montgomery MD 03

1 HOUR 8492 0.1 0.099 0.094 0.093 0 0.00 214 213 100 1 None 1 240330030 Howard University'S Beltsville Laboratory, 12003 Old Baltimore Pike Beltsville Prince George's MD 03

1 HOUR 5004 0.111 0.107 0.102 0.1 0 0.00 214 208 97 1 None 1 240338003 Pg County Equestrian Center, 14900 Pennsylvania Ave. Greater Upper Marlboro Prince

George's MD 03

1 HOUR 8033 0.107 0.103 0.097 0.097 0 0.00 214 189 88 5 None 1 240339991 Powder Mill Rd, Laurel, Md 20708 Not in a city Prince George's MD 03

1 HOUR 5117 0.102 0.101 0.1 0.098 0 0.00 214 213 100 0 None 1 510130020 S 18th And Hayes St Arlington Arlington VA 03

### Page 2 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2012 Exceptional Events: Included (if any)

Duration Description=1 HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

1 HOUR 5061 0.125 0.106 0.099 0.099 1 1.00 214 210 98 1 None 1 510590030 Sta. 46-B9, Lee Park, Telegraph Road Groveton Fairfax VA 03

1 HOUR 4825 0.076 0.074 0.073 0.071 0 0.00 214 201 94 1 None 1 510610002 Rt651 C Phelps Wildlife Management Area Not in a city Fauquier VA 03

1 HOUR 5094 0.092 0.086 0.083 0.081 0 0.00 214 214 100 0 None 1 511071005 38-I, Broad Run High School, Ashburn Not in a city Loudoun VA 03

1 HOUR 5089 0.093 0.089 0.087 0.081 0 0.00 214 212 99 0 None 1 511530009 James S. Long Park Not in a city Prince William VA 03

1 HOUR 5084 0.09 0.089 0.088 0.083 0 0.00 214 214 100 0 None 1 511790001 Widewater Elem. Sch., Den Rich Road Aquia Harbour Stafford VA 03

1 HOUR 3354 0.128 0.107 0.099 0.096 1 1.50 214 140 65 2 None 1 515100009 517 N Saint Asaph St, Alexandria Health Alexandria Alexandria City VA 03

1 HOUR 1537 0.082 0.079 0.078 0.074 0 0.00 214 64 30 1 None 1 515100021 3200 Colvin Street Not in a city Alexandria City VA 03

### Page 3 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2012 Exceptional Events: Included (if any)

Page 3 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2012 Exceptional Events: Included (if any)

Duration Description=8-HR RUN AVG BEGIN HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

8-HR RUN AVG BEGIN HOUR 8657 0.083 0.083 0.082 0.076 4 4.10 214 209 98 0 None 1 110010041 420 34th Street N.E.,Washington, Dc 20019 Washington District of Columbia DC 03

8-HR RUN AVG BEGIN HOUR 8735 0.098 0.088 0.087 0.087 11 11.00 214 214 100 0 None 1 110010043 2500 1st Street, N.W. Washington Dc Washington District of Columbia DC 03

8-HR RUN AVG BEGIN HOUR 5030 0.111 0.091 0.082 0.082 11 11.20 214 210 98 0 None 1 240090011 350 Stafford Road Prince Frederick Calvert MD 03

8-HR RUN AVG BEGIN HOUR 4760 0.102 0.09 0.087 0.084 9 10.00 214 192 90 0 None 1 240170010 14320 Oaks Road Charlotte Hall Charles MD 03

8-HR RUN AVG BEGIN HOUR 4744 0.095 0.085 0.081 0.078 5 5.50 214 196 92 0 None 1 240210037 Frederick County Airport ,180 E Airport Drive Frederick Frederick MD 03

8-HR RUN AVG BEGIN HOUR 5031 0.087 0.077 0.074 0.073 2 2.00 214 210 98 0 None 1 240313001 Lathrop E. Smith Environmental Education Center, 5110 Meadowside Lane Rockville Montgomery MD 03

8-HR RUN AVG BEGIN HOUR 8514 0.091 0.085 0.08 0.079 9 9.00 214 213 100 0 None 1 240330030 Howard University'S Beltsville Laboratory, 12003 Old Baltimore Pike Beltsville Prince George's MD 03

### Page 4 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2012 Exceptional Events: Included (if any)

Duration Description=8-HR RUN AVG BEGIN HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

8-HR RUN AVG BEGIN HOUR 5013 0.104 0.091 0.09 0.09 14 14.50 214 207 97 0 None 1 240338003 Pg County Equestrian Center, 14900 Pennsylvania Ave. Greater Upper Marlboro Prince

George's MD 03

8-HR RUN AVG BEGIN HOUR 8143 0.097 0.085 0.085 0.084 15 17.10 214 188 88 0 None 1 240339991 Powder Mill Rd, Laurel, Md 20708 Not in a city Prince George's MD 03

8-HR RUN AVG BEGIN HOUR 5107 0.094 0.093 0.088 0.084 12 12.10 214 212 99 0 None 1 510130020 S 18th And Hayes St Arlington Arlington VA 03

8-HR RUN AVG BEGIN HOUR 5051 0.106 0.097 0.096 0.084 12 12.30 214 209 98 0 None 1 510590030 Sta. 46-B9, Lee Park, Telegraph Road Groveton Fairfax VA 03

8-HR RUN AVG BEGIN HOUR 4842 0.068 0.063 0.062 0.061 0 0.00 214 199 93 0 None 1 510610002 Rt651 C Phelps Wildlife Management Area Not in a city Fauquier VA 03

8-HR RUN AVG BEGIN HOUR 5097 0.079 0.077 0.073 0.073 2 2.00 214 212 99 0 None 1 511071005 38-I, Broad Run High School, Ashburn Not in a city Loudoun VA 03

8-HR RUN AVG BEGIN HOUR 5092 0.082 0.078 0.075 0.072 2 2.00 214 212 99 0 None 1 511530009 James S. Long Park Not in a city Prince William VA 03

8-HR RUN AVG BEGIN HOUR 5091 0.082 0.081 0.079 0.076 4 4.00 214 212 99 0 None 1 511790001 Widewater Elem. Sch., Den Rich Road Aquia Harbour Stafford VA 03

### Page 5 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2012 Exceptional Events: Included (if any)

Duration Description=8-HR RUN AVG BEGIN HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

8-HR RUN AVG BEGIN HOUR 3343 0.098 0.096 0.089 0.086 7 10.90 214 138 64 0 None 1 515100009 517 N Saint Asaph St, Alexandria Health Alexandria Alexandria City VA 03

8-HR RUN AVG BEGIN HOUR 1529 0.071 0.067 0.067 0.056 0 0.00 214 62 29 0 None 1 515100021 3200 Colvin Street Not in a city Alexandria City VA 03

## Supplement to Technical Support Document for Approval and Promulgation of Air

Quality Implementation Plans; District of Columbia, Maryland and Virginia; Attainment Demonstration for the 1997 8

-Hour Ozone National Ambient Air Quality Standard for the Washington, DC

-MD

-VA Moderate Nonattainment Area (Docket ID#: EPA

-R03

-OAR

-2013

-0132).



# AppendixB

–Monitor Values Reports: Attachment B

-3:Year: 2013

–Generated: August 22, 2014. (Ozone_monitor_report_2013.pdf)

### Page 1 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2013 Exceptional Events: Included (if any)

Page 1 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2013 Exceptional Events: Included (if any)

Duration Description=1 HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

1 HOUR 8460 0.09 0.078 0.078 0.075 0 0.00 214 213 100 1 None 1 110010041 420 34th Street N.E.,Washington, Dc 20019 Washington District of Columbia DC 03

1 HOUR 8630 0.083 0.081 0.079 0.078 0 0.00 214 211 99 3 None 1 110010043 2500 1st Street, N.W. Washington Dc Washington District of Columbia DC 03

1 HOUR 5569 0.081 0.081 0.077 0.074 0 0.00 214 90 42 1 None 1 110010050 301 Van Buren Street, N.W. Washington Dc 20012 Washington District of Columbia DC 03

1 HOUR 5098 0.082 0.077 0.075 0.073 0 0.00 214 211 99 0 None 1 240090011 350 Stafford Road Prince Frederick Calvert MD 03

1 HOUR 4751 0.075 0.073 0.072 0.07 0 0.00 214 199 93 2 None 1 240170010 14320 Oaks Road Charlotte Hall Charles MD 03

1 HOUR 5016 0.086 0.081 0.077 0.077 0 0.00 214 207 97 3 None 1 240210037 Frederick County Airport ,180 E Airport Drive Frederick Frederick MD 03

1 HOUR 5048 0.086 0.083 0.077 0.077 0 0.00 214 210 98 1 None 1 240313001 Lathrop E. Smith Environmental Education Center, 5110 Meadowside Lane Rockville Montgomery MD 03

1 HOUR 8717 0.089 0.087 0.079 0.079 0 0.00 214 213 100 1 None 1 240330030 Howard University'S Beltsville Laboratory, 12003 Old Baltimore Pike Beltsville Prince George's MD 03

1 HOUR 5112 0.083 0.082 0.078 0.078 0 0.00 214 214 100 0 None 1 240338003 Pg County Equestrian Center, 14900 Pennsylvania Ave. Greater Upper Marlboro Prince

George's MD 03

### Page 2 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2013 Exceptional Events: Included (if any)

Duration Description=1 HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

1 HOUR 7480 0.102 0.093 0.092 0.091 0 0.00 214 185 86 4 None 1 240339991 Powder Mill Rd, Laurel, Md 20708 Not in a city Prince George's MD 03

1 HOUR 5111 0.092 0.083 0.078 0.077 0 0.00 214 213 100 1 None 1 510130020 S 18th And Hayes St Arlington Arlington VA 03

1 HOUR 5115 0.083 0.08 0.08 0.072 0 0.00 214 212 99 2 None 1 510590030 Sta. 46-B9, Lee Park, Telegraph Road Groveton Fairfax VA 03

1 HOUR 5055 0.066 0.065 0.063 0.063 0 0.00 214 212 99 0 None 1 510610002 Rt651 C Phelps Wildlife Management Area Not in a city Fauquier VA 03

1 HOUR 5089 0.088 0.078 0.076 0.073 0 0.00 214 214 100 0 None 1 511071005 38-I, Broad Run High School, Ashburn Not in a city Loudoun VA 03

1 HOUR 5095 0.078 0.074 0.072 0.07 0 0.00 214 214 100 0 None 1 511530009 James S. Long Park Not in a city Prince William VA 03

1 HOUR 5096 0.078 0.071 0.07 0.067 0 0.00 214 214 100 0 None 1 511790001 Widewater Elem. Sch., Den Rich Road Aquia Harbour Stafford VA 03

1 HOUR 4816 0.088 0.082 0.079 0.077 0 0.00 214 200 93 4 None 1 515100021 3200 Colvin Street Not in a city Alexandria City VA 03

### Page 3 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2013 Exceptional Events: Included (if any)

Page 3 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2013 Exceptional Events: Included (if any)

Duration Description=8-HR RUN AVG BEGIN HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

8-HR RUN AVG BEGIN HOUR 8515 0.071 0.069 0.062 0.062 0 0.00 214 212 99 0 None 1 110010041 420 34th Street N.E.,Washington, Dc 20019 Washington District of Columbia DC 03

8-HR RUN AVG BEGIN HOUR 8672 0.068 0.066 0.066 0.066 0 0.00 214 211 99 0 None 1 110010043 2500 1st Street, N.W. Washington Dc Washington District of Columbia DC 03

8-HR RUN AVG BEGIN HOUR 5595 0.068 0.067 0.067 0.066 0 0.00 214 90 42 0 None 1 110010050 301 Van Buren Street, N.W. Washington Dc 20012 Washington District of Columbia DC 03

8-HR RUN AVG BEGIN HOUR 5082 0.072 0.072 0.071 0.067 0 0.00 214 211 99 0 None 1 240090011 350 Stafford Road Prince Frederick Calvert MD 03

8-HR RUN AVG BEGIN HOUR 4728 0.069 0.066 0.066 0.064 0 0.00 214 193 90 0 None 1 240170010 14320 Oaks Road Charlotte Hall Charles MD 03

8-HR RUN AVG BEGIN HOUR 4997 0.076 0.069 0.069 0.069 1 1.00 214 207 97 0 None 1 240210037 Frederick County Airport ,180 E Airport Drive Frederick Frederick MD 03

8-HR RUN AVG BEGIN HOUR 5038 0.072 0.07 0.069 0.069 0 0.00 214 209 98 0 None 1 240313001 Lathrop E. Smith Environmental Education Center, 5110 Meadowside Lane Rockville Montgomery MD 03

### Page 4 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2013 Exceptional Events: Included (if any)

Duration Description=8-HR RUN AVG BEGIN HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

8-HR RUN AVG BEGIN HOUR 8710 0.074 0.072 0.071 0.068 0 0.00 214 213 100 0 None 1 240330030 Howard University'S Beltsville Laboratory, 12003 Old Baltimore Pike Beltsville Prince George's MD 03

8-HR RUN AVG BEGIN HOUR 5115 0.072 0.07 0.069 0.069 0 0.00 214 214 100 0 None 1 240338003 Pg County Equestrian Center, 14900 Pennsylvania Ave. Greater Upper Marlboro Prince

George's MD 03

8-HR RUN AVG BEGIN HOUR 7618 0.077 0.077 0.074 0.072 2 2.40 214 175 82 0 None 1 240339991 Powder Mill Rd, Laurel, Md 20708 Not in a city Prince George's MD 03

8-HR RUN AVG BEGIN HOUR 5106 0.075 0.07 0.067 0.067 0 0.00 214 212 99 0 None 1 510130020 S 18th And Hayes St Arlington Arlington VA 03

8-HR RUN AVG BEGIN HOUR 5113 0.076 0.068 0.067 0.067 1 1.00 214 212 99 0 None 1 510590030 Sta. 46-B9, Lee Park, Telegraph Road Groveton Fairfax VA 03

8-HR RUN AVG BEGIN HOUR 5076 0.064 0.06 0.059 0.059 0 0.00 214 211 99 0 None 1 510610002 Rt651 C Phelps Wildlife Management Area Not in a city Fauquier VA 03

8-HR RUN AVG BEGIN HOUR 5115 0.075 0.071 0.069 0.066 0 0.00 214 214 100 0 None 1 511071005 38-I, Broad Run High School, Ashburn Not in a city Loudoun VA 03

8-HR RUN AVG BEGIN HOUR 5121 0.07 0.067 0.066 0.066 0 0.00 214 214 100 0 None 1 511530009 James S. Long Park Not in a city Prince William VA 03

### Page 5 of 5 Generated: August 22, 2014 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2013 Exceptional Events: Included (if any)

Duration Description=8-HR RUN AVG BEGIN HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

8-HR RUN AVG BEGIN HOUR 5114 0.071 0.065 0.064 0.064 0 0.00 214 213 100 0 None 1 511790001 Widewater Elem. Sch., Den Rich Road Aquia Harbour Stafford VA 03

8-HR RUN AVG BEGIN HOUR 4740 0.075 0.071 0.066 0.063 0 0.00 214 194 91 0 None 1 515100021 3200 Colvin Street Not in a city Alexandria City VA 03

## Supplement to Technical Support Document for Approval and Promulgation of Air

Quality Implementation Plans; District of Columbia, Maryland and Virginia; Attainment Demonstration for the 1997 8

-Hour Ozone National Ambient Air Quality Standard for the Washington, DC

-MD

-VA Moderate Nonattainment Area (Docket ID#: EPA

-R03

-OAR

2013

-0132)

.



# Appendix B

–Monitor Values Reports: Attachment B

-4: Year: 2014 (Annual statistics for 2014 are not final until May 1, 2015) Generated:February 10, 2015. (Ozone_monitor_report_20142

-10

-15.pdf)

### Page 1 of 4 Generated: February 10, 2015 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2014 (Annual statistics for 2014 are not final until May 1, 2015) Exceptional Events: Included (if any)

Page 1 of 4 Generated: February 10, 2015 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2014 (Annual statistics for 2014 are not final until May 1, 2015) Exceptional Events: Included (if any)

Duration Description=1 HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

1 HOUR 8543 0.093 0.082 0.078 0.075 0 0.00 214 212 99 2 None 1 110010043 2500 1st Street, N.W. Washington Dc Washington District of Columbia DC 03

1 HOUR 7880 0.09 0.086 0.082 0.078 0 0.00 214 212 99 2 None 1 110010050 301 Van Buren Street, N.W. Washington Dc 20012 Washington District of Columbia DC 03

1 HOUR 5113 0.081 0.08 0.079 0.078 0 0.00 214 213 100 1 None 1 240090011 350 Stafford Road Prince Frederick Calvert MD 03

1 HOUR 4985 0.089 0.087 0.081 0.078 0 0.00 214 209 98 0 None 1 240170010 14320 Oaks Road Charlotte Hall Charles MD 03

1 HOUR 5010 0.076 0.074 0.073 0.07 0 0.00 214 208 97 3 None 1 240210037 Frederick County Airport ,180 E Airport Drive Frederick Frederick MD 03

1 HOUR 5084 0.078 0.076 0.074 0.074 0 0.00 214 213 100 1 None 1 240313001 Lathrop E. Smith Environmental Education Center, 5110 Meadowside Lane Rockville Montgomery MD 03

1 HOUR 8719 0.08 0.079 0.079 0.078 0 0.00 214 211 99 3 None 1 240330030 Howard University'S Beltsville Laboratory, 12003 Old Baltimore Pike Beltsville Prince George's MD 03

1 HOUR 5070 0.091 0.085 0.085 0.082 0 0.00 214 212 99 2 None 1 240338003 Pg County Equestrian Center, 14900 Pennsylvania Ave. Greater Upper Marlboro Prince

George's MD 03

1 HOUR 6985 0.085 0.082 0.082 0.081 0 0.00 214 191 89 2 None 1 240339991 Powder Mill Rd, Laurel, Md 20708 Not in a city Prince George's MD 03

### Page 2 of 4 Generated: February 10, 2015 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2014 (Annual statistics for 2014 are not final until May 1, 2015) Exceptional Events: Included (if any)

Duration Description=1 HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

1 HOUR 5108 0.1 0.089 0.083 0.08 0 0.00 214 213 100 1 None 1 510130020 S 18th And Hayes St Arlington Arlington VA 03

1 HOUR 5086 0.092 0.079 0.077 0.076 0 0.00 214 212 99 2 None 1 510590030 Sta. 46-B9, Lee Park, Telegraph Road Groveton Fairfax VA 03

1 HOUR 5080 0.066 0.065 0.064 0.064 0 0.00 214 211 99 3 None 1 510610002 Rt651 C Phelps Wildlife Management Area Not in a city Fauquier VA 03

1 HOUR 5092 0.083 0.075 0.075 0.074 0 0.00 214 212 99 2 None 1 511071005 38-I, Broad Run High School, Ashburn Not in a city Loudoun VA 03

1 HOUR 5107 0.079 0.075 0.074 0.073 0 0.00 214 214 100 0 None 1 511530009 James S. Long Park Not in a city Prince William VA 03

1 HOUR 5089 0.08 0.075 0.073 0.073 0 0.00 214 214 100 0 None 1 511790001 Widewater Elem. Sch., Den Rich Road Aquia Harbour Stafford VA 03

### Page 3 of 4 Generated: February 10, 2015 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2014 (Annual statistics for 2014 are not final until May 1, 2015) Exceptional Events: Included (if any)

Page 3 of 4 Generated: February 10, 2015 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2014 (Annual statistics for 2014 are not final until May 1, 2015) Exceptional Events: Included (if any)

Duration Description=8-HR RUN AVG BEGIN HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

8-HR RUN AVG BEGIN HOUR 8569 0.08 0.071 0.069 0.068 1 1.00 214 211 99 0 None 1 110010043 2500 1st Street, N.W. Washington Dc Washington District of Columbia DC 03

8-HR RUN AVG BEGIN HOUR 7927 0.082 0.074 0.071 0.069 1 1.00 214 212 99 0 None 1 110010050 301 Van Buren Street, N.W. Washington Dc 20012 Washington District of Columbia DC 03

8-HR RUN AVG BEGIN HOUR 5124 0.072 0.072 0.071 0.07 0 0.00 214 213 100 0 None 1 240090011 350 Stafford Road Prince Frederick Calvert MD 03

8-HR RUN AVG BEGIN HOUR 4987 0.077 0.071 0.07 0.067 1 1.00 214 208 97 0 None 1 240170010 14320 Oaks Road Charlotte Hall Charles MD 03

8-HR RUN AVG BEGIN HOUR 4985 0.064 0.063 0.063 0.063 0 0.00 214 205 96 0 None 1 240210037 Frederick County Airport ,180 E Airport Drive Frederick Frederick MD 03

8-HR RUN AVG BEGIN HOUR 5087 0.067 0.066 0.066 0.064 0 0.00 214 212 99 0 None 1 240313001 Lathrop E. Smith Environmental Education Center, 5110 Meadowside Lane Rockville Montgomery MD 03

8-HR RUN AVG BEGIN HOUR 8709 0.071 0.066 0.066 0.065 0 0.00 214 211 99 0 None 1 240330030 Howard University'S Beltsville Laboratory, 12003 Old Baltimore Pike Beltsville Prince George's MD 03

### Page 4 of 4 Generated: February 10, 2015 Source: U.S. EPA AirData <http://www.epa.gov/airdata> This report is based on monitor-level summary statistics. Air quality standards for some pollutants (PM2.5 and Pb) allow for combining data from multiple monitors into a site-level summary statistic that can be compared to the standard. In those cases, the site-level statistics may differ from the monitor-level statistics upon which this report is based. Readers are cautioned not to rank order geographic areas based on AirData reports. Air pollution levels measured at a particular monitoring site are not necessarily representative of the air quality for an entire county or urban area. AirData reports are produced from a direct query of the AQS Data Mart. The data represent the best and most recent information available to EPA from state agencies. However, some values may be absent due to incomplete reporting, and some values may change due to quality assurance activities. The AQS database is updated daily by state, local, and tribal organizations who own and submit the data. Please contact the appropriate air quality monitoring agency to report any data problems. <http://www.epa.gov/airquality/airdata/ad_contacts.html> Get detailed information about this report, including column descriptions, at http://www.epa.gov/airquality/airdata/ad_about_reports.html#mon 

# Monitor Values Report Geographic Area:Washington-Arlington-Alexandria, DC-VA-MD-WV Pollutant:Ozone Year:2014 (Annual statistics for 2014 are not final until May 1, 2015) Exceptional Events: Included (if any)

Duration Description=8-HR RUN AVG BEGIN HOUR

Duration Description Obs First

Max Second Max Third Max Fourth Max Actual Exc Est Exc Required Days Valid

Days Percent Days Missing

Days Exc Events Monitor Number Site ID Address City County State EPA Region

8-HR RUN AVG BEGIN HOUR 5057 0.076 0.074 0.073 0.069 1 1.00 214 209 98 0 None 1 240338003 Pg County Equestrian Center, 14900 Pennsylvania Ave. Greater Upper Marlboro Prince

George's MD 03

8-HR RUN AVG BEGIN HOUR 7311 0.071 0.07 0.069 0.069 0 0.00 214 184 86 0 None 1 240339991 Powder Mill Rd, Laurel, Md 20708 Not in a city Prince George's MD 03

8-HR RUN AVG BEGIN HOUR 5117 0.087 0.076 0.072 0.071 2 2.00 214 213 100 0 None 1 510130020 S 18th And Hayes St Arlington Arlington VA 03

8-HR RUN AVG BEGIN HOUR 5100 0.078 0.072 0.069 0.069 1 1.00 214 211 99 0 None 1 510590030 Sta. 46-B9, Lee Park, Telegraph Road Groveton Fairfax VA 03

8-HR RUN AVG BEGIN HOUR 5096 0.061 0.061 0.059 0.059 0 0.00 214 211 99 0 None 1 510610002 Rt651 C Phelps Wildlife Management Area Not in a city Fauquier VA 03

8-HR RUN AVG BEGIN HOUR 5108 0.072 0.065 0.064 0.063 0 0.00 214 211 99 0 None 1 511071005 38-I, Broad Run High School, Ashburn Not in a city Loudoun VA 03

8-HR RUN AVG BEGIN HOUR 5115 0.076 0.067 0.063 0.062 1 1.00 214 214 100 0 None 1 511530009 James S. Long Park Not in a city Prince William VA 03

8-HR RUN AVG BEGIN HOUR 5114 0.073 0.067 0.066 0.062 0 0.00 214 213 100 0 None 1 511790001 Widewater Elem. Sch., Den Rich Road Aquia Harbour Stafford VA 03