## Mr. Richard A. 

## Hyde Executive Director UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

## REGION6 1445 ROSS AVENUE, SU ITE 1200 DALLAS TX 75202-2733



## Texas Commission on Environmental Quality, MC 165 Post Office Box 13087 

# JUN 1 0 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 Environmenta l Quality 's (TCEQ) early 2014 certification of the ozone (O J) ambient air monitoring data for completeness to ensure it meets the requirements ofTitle 40 of the Co de ofFederal Regulations (CFR) Part 58 and its appendices. Specifically, our review addressed the OJ data for the Houston-Sugarland- Baytown Metropolitan Sta tistical Area (MSA) including Brazoria, Chambers , Fort Bend , Galveston, Harris, Liberty, Montgomery, and Waller Counties (County Codes 039, 071, 157, 167,201,291 , 339, and 473, respectively). A separate review addressed the OJ data for the Dallas-Fort Worth MSA and Navarro County. This review was detail ed in my letter to you dated March 3 1, 2015. We are pleased to inform you that we have determined the 2014 OJ data for the se specific counties met aH the data quality requirements. We are also very pleased that the Houston area 's air quality has improved so that it is currently meeting the 1997 8-hour ozone air quality s tandard (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 20 14 

# 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 th e AQS database for 20 14 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 Report (AMP600). We appreciate the TCEQ's efforts to prepare and submit the early certification package for the 2014 OJ data for counties w ithin the Houston MSA. We look forward to working with the TCEQ on the evaluation ofthe remaining 2014 data certifications . If you have any questions , please contact me at (2 14) 665-7548 or your staff may contact Ms. Trisha Curran ofmy s taff at (214) 665-8345.

Mark Hansen Acting Associate Director for Air Programs Enclosure Internet Address (URL) • http://www.epa.gov/region6 Recy c l ed/Recyc labl e • Printed with Vegetab le O il Based Inks on 100% Postconsumer, Process Chlorine Free Recycled PaperUNITED STATES ENVIRONMENTAL PROTECTION AGENCY User ID : CTI CERTIFICATION EVALUATION AND CONCURRENCE Report Requ e st ID : 1337335 Rep ort Code: AM P60 0 GEOGRAPHIC SELECTIONS
'l'r iba 1

Code S tat e County Site Parameter POC City AQCR UAR 48 0 39 48 07 1 48 157 48 1 67 48 201 48 2 91 48 339 48 473 PROTOCOL SELECTIONS

# ~ I AGENCY SELECTIONS Parameter Classification Parameter Tex as Commission On Environmental Qu ality Method CRITERI A 442 01 SELECTED OPTIONS O

p t io n Type

.**ERGE** PDF FILES AGENCY ROLE 

# G - -

-

-

· -·---- DATE CRITERIA rt Date End Date 201 4 2014 O pt io n Va lue YES CERTIFYING

Selection Criteria Page 1 CBSA May. 27 , 2015 EPA CSA Reg i on

# Data Evaluation and Concurrence Report Summary M ay . 27, 2 0 15 

## Certification Year : 2014 

## Cert i fy i ng Agency (CA) : Texas Commission On Environmental Quality (1 .035) 

## Po ll utants in Report: Monitors Moni t ors Recommended for Monitors NOT Recommended Pa r amete r Name Code Evaluated Concurrence 

## by AQS for Concurrence 

## by AQS Ozone 44201 20 

## 20 0 PQ A Os i n Repo rt : PQAO Name PQAO Code TSA Date Texas Comm i ssion On Envi ronmenta l Qua l ity 

### 1035 09/07/ 10 

## Summary of ' N' flags fo r a ll pollutants: AQS Cert. Agency Parameter Recommended Recommended PQAO Code AQS Site- 10 POC Fl ag F l ag Reason for AQS Recomme n dation Signature of Mon itoring Organization Represe ntative :

Page 1 of 1

# Data Evaluation and Concurrence Report for Gaseous Pollutants Certifying Year Certifying Agency Code Parameter

QAO Name PP Approval Date NPAP Audit Summary: 

## 2 014 T exa s Comm i ssion On Envi ronmental Qua li ty (1035 ) Ozo ne (4420 1) ( ppm) Texas Comm i ss ion On En vi ronmenta I Qua li ty (1 035 ) 11 /07/2012 N u mbe r of Va li d Aud i ts NPAP Bias Gti te ·ia Met 

### 11 1 .48747 y Routine Data 'o i nt Quality Che c k One P Precl 

# as POC Mon i tor Me a n M i n Max ite 10 Type SLA M S 0.040 0.0 10 0. 1 3 5 SLAMS 0 .038 0.0 11 0.089 8-167-1034 1 SLAM S 0 .0 42 0 .01 3 0.096 8-20Hl0 24 2 SLAMS 0.042 0,01 1 0.093 8-20 1 -00 26 3 SLAMS O.D39 0.0 11 0.08 9 8-20 1 - 00 29 2 SLAM S 0 . 039 0 .0 1 4 0. 08 4 8-20 1 -0046 1 S LAM S 0 . 039 0 .009 0.0 8 0 8-20 1 -004 7 2 S LAMS 0.040 0.0 1 0 0.083 8-20 1 -005 1 2 SLAMS 0.040 0.0 1 0 0.093 8-201-005 5 1 SLAMS 0.040 0 . 0 1 1 0.095 8-20 1 -0062 1 SLAMS 0 . 038 0 . 007 0 . 107 8 -201-0066 1 SLAMS 0.040 0.0 13 0.090 8 -201 -0416 1 SPM 0 . 039 0 .008 0.097 8 -201 - 1015 1 SLAMS 0.037 0.0 10 0.080 8 -201 - 10 1 7 1 SLAMS 0.043 0.0 13 0.090 8-20 1- 10 34 2 SLAMS 0.040 0 . 010 0 . 090 8-201- 1035 3 SLAMS 0.036 0 . 009 0.081 SLA M S 0 .039 0.010 0 . 107 S LA MS 0.040 0 . 007 0 . 083 SLAM S 0 .046 0.016 0 . 0 9 1



# - - Exceed. Outlier Perc. Count Count Comp. 1 0 99 0 0 98 0 0 98 0 0 96 0 0 99 0 0 97 0 0 98 0 0 99 0 0 98 0 0 97 0 0 98 0 0 95 0 0 96 0 0 98 0 0 98 0 0 9 6 0 0 98 0 0 98 0 0 98 0 0 99 1 2 2
1 1 0 0 2 0 

### 2

0 

### 0 slon Bia s Complete

. 08 +/-0.81 100 46 +/-1.24 100 36 +3.30 100

. 95 +/-2.23 100 71 +2.06 100 03 -1.97 100 45 +/-1.05 100 26 +2 .31 77 79 +/-0.64 100 96 -1 52 100 99 + /-2.50 100 61 -1 .3 1 100 96 +/-1.58 100 46 -4 . 36 92 26 +/-1.44 100 37 +/-1.40 100 97 + /- 1 .53 100 35 + /-1.3 6 100 86 +/-0. 48 100 8 3 +/-0 .57 96



## - 

## ···- -

Annual PE NPAP ,- ·- Co nc ur. Flag Bias Complete Bias PQAO level QAPF Aqs Rec CA Rec Epa Criteria Appr . Flag Flag Concur

- 2.15 100 y y y y y

- 8.79 100 y y y y y

4.62 1 00 y y y y y

- 2.56 100 y y y y y

0.78 100 y y y y y

- 3.63 100 y y y y y

- 1.37 100 1 . 51 y y y y y

- 2.47 100 y y 

### y y y

- 6.30 100 y y y y y

- 3.48 100 

### y y y y y

- 8.55 100 y y y y y

- 8.23 100 y y y y y

- 6.60 100 y y y y y - 7 .74 100 y y y y y

- 4.13 100 y y y y y

1 .74 100 y y y y y

- 0.74 100 y y y y y

- 7.17 100 y y y y y

- 1 .09 1 0 0 y y y y y

1 .1 4 1 0 0 y y y y y

- - . ··- · -- 

## ... .....