Mr. Richard A. Hyde 

Executive Director 

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

REGION6 

1445 ROSS AVENUE, SUITE 1200 

DALLAS TX 75202-2733 

Texas Commission on Environmental Quality, MC 165 

Post Office Box 13087 MAR 31 2015 Austin, TX 78711-3087 

Dear Mr. Hyde: 

The U.S. Environmental Protection Agency (EPA) Region 6 has concluded its review of the 

Texas Commission on Environmental Quality's (TCEQ) early 2014 certification of the ozone (03) 

ambient air monitoring data for completeness to ensure it meets the requirements of Title 40 of the 

Code of Federal Regulations (CFR) Part 58 and its appendices. Specifically, our review addressed the 

03 data for the Dallas-Fort Worth (DFW) MSA including Collin, Dallas, Denton, Ellis, Hood, Hunt, 

Johnson, Kaufinan, Parker, Rockwall, Tarrant, and Wise Counties (County Codes 085, 113, 121, 139, 

221,231,251,257, 367, 397,439, and 497, respectively) and Navarro County (County Code 349) which 

adjoins the DFW MSA counties. 

A separate review will address the 03 data for the Houston-Sugarland-Baytown MSA. Once our r eview 

of the Houston area data is complete, we will work expeditiously to address your request for a one year 

extension to the attainment date for the Houston area under the 2008 03 standard. 

We are pleased to inform you that we have determined the 2014 03 data for these specific counties met 

all the data quality requirements. We are also very pleased that the DFW area's air quality has improved 

so that it is currently meeting the 1997 8-hour ozone air quality standard (i.e. below 85 parts per billion). 

The TCEQ has entered the recommended data annotations or data evaluation flags of "Y" into the 

EPA's national air monitoring database (AQS) to demonstrate that the 2014 03 data for these counties 

have been through the TCEQ's validation process and have been loaded into the database. We have 

entered evaluation flags of"Y" for the 03 monitors for these counties in the AQS database for 2014 to 

reflect that the TCEQ has completed the data certification process for these monitors and the EPA has 

no unresolved reservations about the data quality. This information is reflected in the enclosed 

Certification Evaluation and Concurrence Repo11 (AMP600). · 

We appreciate the TCEQ's efforts to prepare and submit the early certification package for the 2014 03 

data for counties within the DFW MSA and Navarro County. We look forward to working with the 

TCEQ on the evaluation of the remaining 2014 data certifications. If you have any questions, please 

contact me at (214) 665-7548 or your staff may contact Ms. Trisha Curran of my staff at (214) 665-

8345. 

Mark Hansen 

Acting Associate Director for Air Programs 

Internet Address (URL) • http://www.epa.gov/reglon6 

Recycled/Recyclable • Printed with Vegetable Oil Based Inks on 100% Postconsumer, Process Chlorine Free Recycled Paper 
User ID: CTI 

Report Rc~ cs t ID: 1313283 

[ Tribal 

Code State 

18 

18 

48 

4 8 

48 

48 

18 

48 

48 

4 8 

48 

48 

48 

PROTOCOL SELECTIONS 

Parameter 

ClasslCit:al.ion Paramett:Ot' Method 

CRITERIA 4420 1 

L SELECTED OPTIONS 

Optlon Type 

- ------------- MERGE PDF FILES 

AGENCY ROLE 

UNITED STATES ENVTRONMENTAL PROTECTI ON AGENCY 

CERTIFICATION EVALUATION AND CONCURRENCE 

Report Cod e: AMP600 

GEOGRAPHIC SELt:C'l'lONS 

County 

085 

1!3 

121 

139 

221 

231 

251 

257 

349 

367 

397 

439 

49'1 

Site Parameter POC City AQCR UAR 

AGENCY SELECTIONS I d [ 

Texas 

ou_ 

Commission On Environmental Quality 

Option Va lue 

YES 

CERTIFYING 

~ 

CBSA 

[~~~rt DATE CRITERIA 

2014 

Date 

2014 

End ~~ 

Selecti on Cr iteria Page 1 

CSA 

EPA 

Region - - ---

Mar. 30, 2015 

~ 
Data Evaluation and Concurrence Report Summary Mar. 3 0, 2015 

Certification Year: 2014 

Certifying Agency (CA): Texas Commission On Environmental Quality (1 035) 

Pollutants in Report: Monitors Monitors Recommended for Monitors NOT Recommended 

Parameter Name Code Evaluated Concurrence by AQS for Concurrence by AQS 

Ozone 44201 20 20 0 

PQAOs in Report: 

PQAO Name PQAO Code TSA Date 

Texas Commission On Environmental Quality 1035 09/07/10 

Summary of 'N' flags for all pollutants: AQS Cert. Agency 

Parameter Recommended Recommended 

PQAO Code AQS Site-ID POC Flag Flag Reason for AQS Recommendation 

Signature of Monitoring Organization Representative: 

Page 1 of 1 
Data Evaluation and Concurrence Report for Gaseous Pollutants 

Certifying Year 2014 

Certifying Agency Code 

Param~:.::..:._ eter ____ _ PQAO Name 

Texas Commission On Environmental Quality (1035) 

one (44201) (ppm)-:=----,--- -

Texas Commission On Environmental Quality (1035) 

APP Approval Date 11/07/201 2 

NPAP Audit Summary: Number of Valid Audits NPAP Bias Criteria Met 

OS POC Monitor E Min 

:ineData 

ite 10 Type 

8-085.0005 1 SLAMS 0.052 0.011 

8-113-0069 3 SLAMS 0.049 0.007 

SLAMS 0.050 0.007 

SLAMS 0.046 0.011 

SLAMS 

8-121-1032 1 SPM 

r.8-139-0016 1 SLAMS 

r 8-139-1044 1 SLAMS 

r.8-221-0001 1 SLAMS 

!48-231-1006 1 SLAMS 

8-251-0003 1 SLAMS 

8-257-0005 1 SLAMS 

8-349-1051 1 SPM 

8-367-0081 1 SLAMS 

8-397-0001 1 SLAMS 

8-439.0075 1 SLAMS 

8-439-1002 2 SLAMS 

8-439-2003 2 SLAMS 

8-439-3009 1 SLAMS 

8-439-3011 1 SLAMS 

0.054 

0.054 

0.047 

0045 

0.050 

0.046 

0.050 

0.047 

0.045 

0.049 

0.050 

0.048 

0.052 

0.050 

0.052 

0.046 - - ·---- - -

0.013 

0.009 

0.008 

0.010 

0.015 

0.006 

0.011 

0.007 

0.011 

0.014 

0.007 

0.009 

0.009 

0.010 

0.010 

0.007 

11 

Max 

0.091 

0.090 

0.096 

0.081 

0.094 

0.096 

0.077 

O.o79 

0. 107 

0.072 

0.087 

0.072 

0.077 

0.089 

0.080 

0.092 

0.105 

0.094 

0.094 

0.095 

1.48747 

Exceed. Outlier 

Count Count 

0 0 

0 0 

0 0 

0 0 

0 0 

0 0 

0 0 

0 0 

0 0 

0 0 

0 0 

0 0 

0 0 

0 0 

0 0 

0 0 

0 0 

0 0 

0 0 

0 0 

Perc. 

Comp. 

98 

96 

86 

98 

99 

99 

98 

99 

98 

98 

99 

98 

98 

99 

98 

99 

98 

99 

98 

98 

y 

One Point Quality Check 

Precision Bias Complete 

1.38 -2.43 100 

2.00 +/-1.75 94 

2.26 +/-1 .71 88 

2.05 +2.30 100 

0.61 -1.23 100 

1 .53 +/-1.33 100 

1.43 +/-1.12 100 

0.86 -3.95 100 

2.15 +2.39 88 

1.20 +1.27 100 

2.19 +/-2.04 100 

1.23 +/-0.96 100 

0.86 +1.26 100 

2.42 +/-2.52 100 

1.16 +1.47 100 

1.80 +2.58 100 

1.66 +/-1 .29 100 

1.24 +/-1.08 100 

1.62 +/-1.29 94 

0.74 +/.0.99 100 

AnnualPE 

Bias Complete 

- 2.44 100 

- 0.14 100 

• 3.57 100 

• 5.77 100 

. 0.27 100 

• 3.06 100 

- 6.15 100 

- 5.80 100 

. 3.23 100 

- 1.83 100 

. 4.43 100 

• 1.52 100 

- 4.01 100 

2.48 100 

0.76 100 

• 5.63 100 

0.83 100 

- 6.79 100 

0.32 100 

- 3.31 100 

NPAP 

Bias PQAO Level 

Criteria 

y 

0.72 y 

955 y 

8.53 y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

3.84 y 

1.46 y 

• 3.33 y 

y 

- 5.90 y 

y 

- 1.61 y 

Concur. Flag 

I QAP~ Aqs Rec CA Rec Epa 

Appr. Flag Flag Concur 

y y y y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y 

y . 

y 

y 

y 

y 

y