UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

DESIGN VALUE REPORT

Nov. 5, 2015 Report Request ID: 1383866 Report Code: AMP480

Selection Criteria Page 1 User ID:HTC

State County City Site Parameter POC AQCR UAR CBSA CSA EPA Region 11 24 24 51 51 51 51 51 001

005 510 013 036 087 107 153 3001

0040 0020 0002 0014 1005 0009 GEOGRAPHIC SELECTIONS

PROTOCOL SELECTIONS
Parameter Classification Parameter Method Duration
DESIGN VALUE 42602

SELECTED OPTIONS

SINGLE EVENT PROCESSING WORKFILE DELIMITER USER SITE METADATA MERGE PDF FILES QUARTERLY DATA IN WORKFILE

AGENCY ROLE Option Type Option Value
EXCLUDE REGIONALLY CONCURRED EVENTS

, STREET ADDRESS YES NO PQAO
DATE CRITERIA

2010 Start Date End Date 2014 Tribal Code

APPLICABLE STANDARDS Standard Description NO2 1-hourUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 1 of 17UNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 2 of 17 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Nitrogen dioxide (NO2) Parts per billion(008) NO2 1-hour Annual 98th Percentile Level: Design Value Year: 2010 REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 100 State Name: District Of Columbia

Site ID STREET ADDRESS | | |Comp. Qtrs 98th Percentile Cert&

Eval |

| | Comp. Qtrs 98th

Percentile Cert&

Eval |

| | Comp. Qtrs 98th PercentileCert&

Eval |

| | Design Value | | | 3-Year 2010 2009 2008

11-001-0025 11-001-0041 11-001-0043 TAKOMA SC. 7010 PINEY B

420 34th Street N.E.,Was 2500 1ST STREET, N.W. WA 4 4 4 55.2 59.0 57.0 4 4 4 53.0 63.0 62.0 4 4 4 49.0 61.0 58.0 52 61 59 DV Validity Indicator

Y Y YUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 3 of 17 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Nitrogen dioxide (NO2) Parts per billion(008) NO2 1-hour Annual 98th Percentile Level: Design Value Year: 2010 REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 100 State Name: Maryland

Site ID STREET ADDRESS | | |Comp. Qtrs 98th Percentile Cert&

Eval |

| | Comp. Qtrs 98th

Percentile Cert&

Eval |

| | Comp. Qtrs 98th PercentileCert&

Eval |

| | Design Value | | | 3-Year 2010 2009 2008

24-005-3001 24-510-0040 600 Dorsey Avenue

Oldtown Fire Station, 11 4 4 54.0 61.0 4 4 50.0 59.0 4 4 51.0 52.0 52 57 DV Validity Indicator

Y YUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 4 of 17 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Nitrogen dioxide (NO2) Parts per billion(008) NO2 1-hour Annual 98th Percentile Level: Design Value Year: 2010 REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 100 State Name: Virginia

Site ID STREET ADDRESS | | |Comp. Qtrs 98th Percentile Cert&

Eval |

| | Comp. Qtrs 98th

Percentile Cert&

Eval |

| | Comp. Qtrs 98th PercentileCert&

Eval |

| | Design Value | | | 3-Year 2010 2009 2008

51-013-0020 51-036-0002 51-087-0014 51-107-1005 51-153-0009 S 18TH AND HAYES ST

SHIRLEY PLANTATION, ROUT 2401 HARTMAN STREET MAT 38-I, BROAD RUN HIGH SCH JAMES S. LONG PARK 4 4 4 4 4 52.0 56.0 45.6 44.0 30.0 4 4 4 4 4 49.0 55.0 40.0 40.0 26.0 4 4

4 4 49.0 60.0 34.0 37.0 35.0 50 57 40 40 30 DV Validity Indicator

Y Y N Y YUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 5 of 17 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Nitrogen dioxide (NO2) Parts per billion(008) NO2 1-hour Annual 98th Percentile Level: Design Value Year: 2011 REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 100 State Name: District Of Columbia

Site ID STREET ADDRESS | | |Comp. Qtrs 98th Percentile Cert&

Eval |

| | Comp. Qtrs 98th

Percentile Cert&

Eval |

| | Comp. Qtrs 98th PercentileCert&

Eval |

| | Design Value | | | 3-Year 2011 2010 2009

11-001-0025 11-001-0041 11-001-0043 TAKOMA SC. 7010 PINEY B

420 34th Street N.E.,Was 2500 1ST STREET, N.W. WA 4 4 55.0 52.0 4 4 4 55.2 59.0 57.0 4 4 4 53.0 63.0 62.0 54 59 57 DV Validity Indicator

N Y YUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 6 of 17 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Nitrogen dioxide (NO2) Parts per billion(008) NO2 1-hour Annual 98th Percentile Level: Design Value Year: 2011 REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 100 State Name: Maryland

Site ID STREET ADDRESS | | |Comp. Qtrs 98th Percentile Cert&

Eval |

| | Comp. Qtrs 98th

Percentile Cert&

Eval |

| | Comp. Qtrs 98th PercentileCert&

Eval |

| | Design Value | | | 3-Year 2011 2010 2009

24-005-3001 24-510-0040 600 Dorsey Avenue

Oldtown Fire Station, 11 4 4 47.0 54.0 4 4 54.0 61.0 4 4 50.0 59.0 50 58 DV Validity Indicator

Y YUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 7 of 17 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Nitrogen dioxide (NO2) Parts per billion(008) NO2 1-hour Annual 98th Percentile Level: Design Value Year: 2011 REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 100 State Name: Virginia

Site ID STREET ADDRESS | | |Comp. Qtrs 98th Percentile Cert&

Eval |

| | Comp. Qtrs 98th

Percentile Cert&

Eval |

| | Comp. Qtrs 98th PercentileCert&

Eval |

| | Design Value | | | 3-Year 2011 2010 2009

51-013-0020 51-036-0002 51-087-0014 51-107-1005 51-153-0009 S 18TH AND HAYES ST

SHIRLEY PLANTATION, ROUT 2401 HARTMAN STREET MAT 38-I, BROAD RUN HIGH SCH JAMES S. LONG PARK 4 4 4 4 4 45.7 55.3 37.5 38.3 28.9 4 4 4 4 4 52.0 56.0 45.6 44.0 30.0 4 4 4 4 4 49.0 55.0 40.0 40.0 26.0 49 55 41 41 28 DV Validity Indicator

Y Y Y Y YUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 8 of 17 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Nitrogen dioxide (NO2) Parts per billion(008) NO2 1-hour Annual 98th Percentile Level: Design Value Year: 2012 REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 100 State Name: District Of Columbia

Site ID STREET ADDRESS | | |Comp. Qtrs 98th Percentile Cert&

Eval |

| | Comp. Qtrs 98th

Percentile Cert&

Eval |

| | Comp. Qtrs 98th PercentileCert&

Eval |

| | Design Value | | | 3-Year 2012 2011 2010

11-001-0025 11-001-0041 11-001-0043 TAKOMA SC. 7010 PINEY B

420 34th Street N.E.,Was 2500 1ST STREET, N.W. WA 4 4 51.0 50.1 Y

Y 4

4 55.0 52.0 4 4 4 55.2 59.0 57.0 55 55 53 DV Validity Indicator

N Y YUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 9 of 17 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Nitrogen dioxide (NO2) Parts per billion(008) NO2 1-hour Annual 98th Percentile Level: Design Value Year: 2012 REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 100 State Name: Maryland

Site ID STREET ADDRESS | | |Comp. Qtrs 98th Percentile Cert&

Eval |

| | Comp. Qtrs 98th

Percentile Cert&

Eval |

| | Comp. Qtrs 98th PercentileCert&

Eval |

| | Design Value | | | 3-Year 2012 2011 2010

24-005-3001 24-510-0040 600 Dorsey Avenue

Oldtown Fire Station, 11 4 4 43.0 56.0 Y

Y 4

4 47.0 54.0 4 4 54.0 61.0 48 57 DV Validity Indicator

Y YUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 10 of 17 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Nitrogen dioxide (NO2) Parts per billion(008) NO2 1-hour Annual 98th Percentile Level: Design Value Year: 2012 REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 100 State Name: Virginia

Site ID STREET ADDRESS | | |Comp. Qtrs 98th Percentile Cert&

Eval |

| | Comp. Qtrs 98th

Percentile Cert&

Eval |

| | Comp. Qtrs 98th PercentileCert&

Eval |

| | Design Value | | | 3-Year 2012 2011 2010

51-013-0020 51-036-0002 51-087-0014 51-107-1005 51-153-0009 S 18TH AND HAYES ST

SHIRLEY PLANTATION, ROUT 2401 HARTMAN STREET MAT 38-I, BROAD RUN HIGH SCH JAMES S. LONG PARK 4 4 4 4 4 43.6 45.5 40.0 36.0 25.2 Y

Y M Y Y 4

4 4 4 4 45.7 55.3 37.5 38.3 28.9 4 4 4 4 4 52.0 56.0 45.6 44.0 30.0 47 52 41 39 28 DV Validity Indicator

Y Y Y Y YUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 11 of 17 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Nitrogen dioxide (NO2) Parts per billion(008) NO2 1-hour Annual 98th Percentile Level: Design Value Year: 2013 REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 100 State Name: District Of Columbia

Site ID STREET ADDRESS | | |Comp. Qtrs 98th Percentile Cert&

Eval |

| | Comp. Qtrs 98th

Percentile Cert&

Eval |

| | Comp. Qtrs 98th PercentileCert&

Eval |

| | Design Value | | | 3-Year 2013 2012 2011

11-001-0041 11-001-0043 11-001-0050 420 34th Street N.E.,Was

2500 1ST STREET, N.W. WA 301 Van Buren Street, N. 4 4 2 48.0 47.7 58.0 S

S S 4

4 51.0 50.1 Y

Y 4

4 55.0 52.0 51 50 58 DV Validity Indicator

Y Y NUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 12 of 17 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Nitrogen dioxide (NO2) Parts per billion(008) NO2 1-hour Annual 98th Percentile Level: Design Value Year: 2013 REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 100 State Name: Maryland

Site ID STREET ADDRESS | | |Comp. Qtrs 98th Percentile Cert&

Eval |

| | Comp. Qtrs 98th

Percentile Cert&

Eval |

| | Comp. Qtrs 98th PercentileCert&

Eval |

| | Design Value | | | 3-Year 2013 2012 2011

24-005-3001 24-510-0040 600 Dorsey Avenue

Oldtown Fire Station, 11 4 4 43.2 46.7 4 4 43.0 56.0 Y

Y 4

4 47.0 54.0 44 52 DV Validity Indicator

Y YUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 13 of 17 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Nitrogen dioxide (NO2) Parts per billion(008) NO2 1-hour Annual 98th Percentile Level: Design Value Year: 2013 REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 100 State Name: Virginia

Site ID STREET ADDRESS | | |Comp. Qtrs 98th Percentile Cert&

Eval |

| | Comp. Qtrs 98th

Percentile Cert&

Eval |

| | Comp. Qtrs 98th PercentileCert&

Eval |

| | Design Value | | | 3-Year 2013 2012 2011

51-013-0020 51-036-0002 51-087-0014 51-107-1005 51-153-0009 S 18TH AND HAYES ST

SHIRLEY PLANTATION, ROUT 2401 HARTMAN STREET MAT 38-I, BROAD RUN HIGH SCH JAMES S. LONG PARK 3 4 4 4 4 43.1 38.9 38.2 37.0 28.6 S

M S S S 4

4 4 4 4 43.6 45.5 40.0 36.0 25.2 Y

Y M Y Y 4

4 4 4 4 45.7 55.3 37.5 38.3 28.9 44 47 39 37 28 DV Validity Indicator

N Y Y Y YUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 14 of 17 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Nitrogen dioxide (NO2) Parts per billion(008) NO2 1-hour Annual 98th Percentile Level: Design Value Year: 2014 REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 100 State Name: District Of Columbia

Site ID STREET ADDRESS | | |Comp. Qtrs 98th Percentile Cert&

Eval |

| | Comp. Qtrs 98th

Percentile Cert&

Eval |

| | Comp. Qtrs 98th PercentileCert&

Eval |

| | Design Value | | | 3-Year 2014 2013 2012

11-001-0041 11-001-0043 11-001-0050 420 34th Street N.E.,Was

2500 1ST STREET, N.W. WA 301 Van Buren Street, N. 4 4 63.0 44.9 47.0 4 4 2 48.0 47.7 58.0 S

S S 4

4 51.0 50.1 Y

Y 54

48 53 DV Validity Indicator

N Y NUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 15 of 17 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Nitrogen dioxide (NO2) Parts per billion(008) NO2 1-hour Annual 98th Percentile Level: Design Value Year: 2014 REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 100 State Name: Maryland

Site ID STREET ADDRESS | | |Comp. Qtrs 98th Percentile Cert&

Eval |

| | Comp. Qtrs 98th

Percentile Cert&

Eval |

| | Comp. Qtrs 98th PercentileCert&

Eval |

| | Design Value | | | 3-Year 2014 2013 2012

24-005-3001 24-510-0040 600 Dorsey Avenue

Oldtown Fire Station, 11 4 4 46.4 51.8 S

S 4

4 43.2 46.7 4 4 43.0 56.0 Y

Y 44

52 DV Validity Indicator

Y YUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 16 of 17 

### Pollutant: Standard Units: NAAQS Standard: Statistic: Nitrogen dioxide (NO2) Parts per billion(008) NO2 1-hour Annual 98th Percentile Level: Design Value Year: 2014 REPORT EXCLUDES MEASUREMENTS WITH REGIONALLY CONCURRED EVENT FLAGS. 100 State Name: Virginia

Site ID STREET ADDRESS | | |Comp. Qtrs 98th Percentile Cert&

Eval |

| | Comp. Qtrs 98th

Percentile Cert&

Eval |

| | Comp. Qtrs 98th PercentileCert&

Eval |

| | Design Value | | | 3-Year 2014 2013 2012

51-013-0020 51-036-0002 51-087-0014 51-107-1005 51-153-0009 S 18TH AND HAYES ST

SHIRLEY PLANTATION, ROUT 2401 HARTMAN STREET MAT 38-I, BROAD RUN HIGH SCH JAMES S. LONG PARK 3 4 3 3 4 49.9 43.5 37.3 42.5 30.7 S

S S S S 3

4 4 4 4 43.1 38.9 38.2 37.0 28.6 S

M S S S 4

4 4 4 4 43.6 45.5 40.0 36.0 25.2 Y

Y M Y Y 46

43 39 39 28 DV Validity Indicator

N Y N N YUNITED STATES ENVIRONMENTAL PROTECTION AGENCY AIR QUALITY SYSTEM PRELIMINARY DESIGN VALUE REPORT Report Date:Nov. 5, 2015

Notes:1. Computed design values are a snapshot of the data at the time the report was run (may not be all data for year). 2. Some PM2.5 24-hour DVs for incomplete data that are marked invalid here may be marked valid in the Official report due to additional analysis. 3. Annual Values not meeting completeness criteria are marked with an asterisk ('*').
Page 17 of 17 M

N

S

U

X

Y The monitoring organization has revised data from this monitor since the

most recent certification letter received from the state. The certifying agency has submitted the certification letter and required summary reports, but the certifying agency and/or EPA has determined that issues regarding the quality of the ambient concentration data cannot be resolved due to data completeness, the lack of performed quality assurance checks or the results of uncertainty statistics shown in the AMP255 report or the certification and quality assurance report. The certifying agency has submitted the certification letter and required summary reports. A value of "S" conveys no Regional assessment regarding data quality per se. This flag will remain until the Region provides an "N" or "Y" concurrence flag. Uncertified. The certifying agency did not submit a required certification letter and summary reports for this monitor even though the due date has passed, or the state's certification letter specifically did not apply the certification to this monitor. Certification is not required by 40 CFR 58.15 and no conditions apply to be the basis for assigning another flag value The certifying agency has submitted a certification letter, and EPA has no unresolved reservations about data quality (after reviewing the letter, the attached summary reports, the amount of quality assurance data submitted to AQS, the quality statistics, and the highest reported concentrations). MEANING CERTIFICATION EVALUATION AND CONCURRENCE FLAG MEANINGS

FLAG