UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

REGION III

1650 Arch Street

Philadelphia, Pennsylvania 19103-2029

SUBJECT: Determination of Failure to Attain by 2005 and Determination of 

Attainment by 2008 for the 1-Hour Ozone National Ambient Air 

Quality Standards in the Baltimore Nonattainment Area in Maryland 

[EPA-R03-OAR-2011-0680] – Technical Support Document 

Supplement

FROM: Christopher Cripps, Project Officer /s/ May 23, 2012

Office of Air Program Planning

TO: File for Docket EPA-R03-OAR-2011-0680

THRU: Donna Mastro, Acting Associate Director /s/

Office of Air Program Planning 

Throughout this document, “we,” “us,” and “our” refer to the Environmental Protection 

Agency (EPA).

This document supplements the Technical Support Document “Determination of Failure to Attain 

by 2005 and Determination of Attainment by 2008 for the 1-Hour Ozone National Ambient Air 

Quality Standards in the Baltimore Nonattainment Area in Maryland” dated January 26, 2012 

(Docket item number EPA-R03-OAR-2011-0680-0008) (the January 26, 2012 TSD). 

In the January 26, 2012 TSD, compliance with the 1-hour ozone NAAQS for the 2009 to 2011 

period was computed using preliminary data, that is, data that had not been certified by the State of 

Maryland. On April 12, 2012, the Maryland Department of the Environment certified the 2011 air 

quality monitoring data for ozone as complete and quality-assured. Refer to the letter dated April 

19, 2012, from George (Tad) Aburn, Director, Air and Radiation Management Administration, 

Maryland Department of the Environment to Shawn M. Garvin, Regional Administrator, EPA 

Region III and attached reports. A copy of this document and attachments has been placed into the 

docket for this action. 

EPA has compared the preliminary 2011 data and the final, quality assured and certified 2011 data 

for the Baltimore area and found that the certified 2011 ozone data has not changed. Refer to EPA 

AQS Database, “Quicklook Criteria Parameters,” Report Request ID 937336, Report Code 

AMP450, dated December 13, 2011 which as attached to appendix A to the January 26, 2012 TSD 

and to EPA AQS Database, “Quicklook Criteria Parameters,” Report Request ID 990350, Report 

Code AMP450, dated May 8, 2012. A copy of the latter is attached to this document. 
2

Therefore, the compliance determinations in Appendix A to and in Table 6 of the January 26, 2012 

remain valid and are now based upon final 2009, 2010 and 2010 data. Table 6 is reproduced 

below:

Table 6. Number and Average Number of Ozone Expected Exceedance Days per Year by 

Monitor in the Baltimore area 2009 to 2011

Monitor Information

Annual Number of Expected 

Exceedance Days

Average Number of 

Expected Exceedance Days 

Per Year 

Monitor – AQS ID No. & 

“Short Name”

2009 2010 2011 2009-2011

24-510-0054 – Furley 0.0 0.0 0.0 0.0

24-003-0014 – Davidsonville 0.0 0.0 0.0 0.0

24-005-1007 – Padonia 0.0 0.0 0.0 0.0

24-005-3001 – Essex 0.0 1.0 0.0 0.3

24-013-0001 – South Carroll 0.0 0.0 1.0 0.0

24-025-1001 – Edgewood 1.0 1.1 1.0 1.0

24-025-9001– Aldino 0.0 0.0 0.0 0.0

Source: EPA AQS Database, “Quicklook Criteria Parameters,” Report Request ID 843146, 

Report Code AMP450, dated March 3, 2011, for the 2009 to 2010 data and Report Request ID 

990350, Report Code AMP450, dated May 8, 2012 for the 2011 data.

EPA can therefore determine that the Baltimore area is currently attaining the 1-hour ozone 

standard. EPA’s determination is based on the most recent three-year periods of complete, qualityassured and certified data, 2008-2010 and continuing in 2009-2011. Moreover, complete, qualityassured and certified data show that the Baltimore area has attained the 1-hour ozone standard 

since the 2006-2008 monitoring period and for every three-year period since that time. 
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

QUICKLOOK CRITERIA PARAMETERS

Report Request ID: 990350 Report Code: AMP450 May. 8, 2012

Selection Criteria Page 1

User ID: SKV

State County Site Parameter POC City AQCR UAR CBSA CSA

EPA

Region Method Duration Begin Date End Date

24

24

24

24

24

24

003

005

013

025

027

510

44201

44201

44201

44201

44201

44201

1

1

1

1

1

1

GEOGRAPHIC SELECTIONS

SELECTED OPTIONS

EVENTS PROCESSING

MERGE PDF FILES

WORKFILE DELIMITER

Option Type Option Value

EXCLUDE REGIONALLY CONCURRED EVENTS

YES

,

SORT ORDER

1

2

3

4

5

6

7

Order Column

PARAMETER_CODE

STATE_CODE

COUNTY_CODE

SITE_ID

POC

DATES

EDT_ID

GLOBAL DATES

2011

Start Date End Date

2011

Tribal

Code

APPLICABLE STANDARDS

Standard Description

Ozone 1-hour Daily 2005
May. 8, 2012

Note: The * indicates that the mean does

not satisfy summary criteria.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

AIR QUALITY SYSTEM

QUICK LOOK REPORT (AMP450)

Page 1 of 4

EXCEPTIONAL DATA TYPES

EDT DESCRIPTION

0

1

2

5

NO EVENTS

EVENTS EXCLUDED

EVENTS INCLUDED

EVENTS WITH CONCURRENCE EXCLUDED
May. 8, 2012

Note: The * indicates that the mean does

not satisfy summary criteria.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

AIR QUALITY SYSTEM

QUICK LOOK REPORT (AMP450)

Page 2 of 4

Ozone (44201) Maryland Parts per million (007)

SITE ID

P

O

C PQAO CITY COUNTY ADDRESS YEAR METH

VALID

DAYS

MEAS

1ST

MAX

1-HR CERT EDT

24-003-0014

24-005-1007

24-005-3001

24-013-0001

24-025-1001

24-025-9001

24-510-0054

1

1

1

1

1

1

1

1002

1002

1002

1002

1002

1002

1002

Not in a city

Cockeysville

Essex

Not in a city

Edgewood

Not in a city

Baltimore

Anne Arundel

Baltimore

Baltimore

Carroll

Harford

Harford

Baltimore (City)

Davidsonville 

Recreation 

Center, 3801 

Queen Anne 

Bridge Road

Padonia 

Elementary 

School, 9834 

Greenside Drive

600 Dorsey 

Avenue

1300 W. Old 

Liberty Road

 Edgewood 

Chemical 

Biological 

Center (APG), 

Waehli Road

3560 Aldino 

Road

Furley E.S. 

Recreational 

Center, 4633 

Furley Avenue.

2011

2011

2011

2011

2011

2011

2011

047

091

047

047

091

047

091

208

195

203

210

209

201

203

.111

.113

.112

.099

.131

.114

.107

.110

.103

.109

.089

.121

.114

.106

0

0

0

0

0

0

0

2ND

MAX

1-HR

1-HOUR 

NUM

DAYS

REQ

214

214

214

214

214

214

214

.102

.103

.106

.085

.118

.113

.094

3RD

MAX

1-HR

.098

.094

.103

.085

.118

.108

.092

4TH

MAX

1-HR

DAY

MAX>

STD

0

0

0

0

1

0

0

EST

DAYS>

STD

 0.0

 0.0

 0.0

 0.0

 1.0

 0.0

 0.0

MISS

DAYS<

STD

1

2

6

2

3

2

1
May. 8, 2012

Note: The * indicates that the mean does

not satisfy summary criteria.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

AIR QUALITY SYSTEM

QUICK LOOK REPORT (AMP450)

Page 3 of 4

44201

44201

047

091

INSTRUMENTAL

INSTRUMENTAL

ULTRA VIOLET

ULTRAVIOLET RADIATION ABSORBTN

PARAMETER

METHOD

CODE COLLECTION METHOD ANALYSIS METHOD

METHODS USED IN THIS REPORT
May. 8, 2012

Note: The * indicates that the mean does

not satisfy summary criteria.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

AIR QUALITY SYSTEM

QUICK LOOK REPORT (AMP450)

Page 4 of 4

PQAOS USED IN THIS REPORT

PQAO AGENCY DESCRIPTION

1002 State Of Maryland Air Management Administration