TECHNICAL SUPPORT DOCUMENT

Revisions to the Texas State Implementation Plan

30 TAC Chapter 101 – General Air Quality Rules

Subchapter A – General Rules

§ 101.1 - Definitions

Submitted as part of the following:

Rule Project No: 2005-009-116-PR on June 10, 2005

Rule Project No: 2006-053-101-PR on August 16, 2007

Rule Project No: 2009-006-101-EN on April 6, 2010

Rule Project No. 2008-030-116-PR on March 11, 2011

Correction Letter on May 26, 2011

August 20, 2013

FOR FURTHER INFORMATION CONTACT: Ms. Adina Wiley, United States Environmental 

Protection Agency Region 6, Air Permits Section (6PD-R), 1445 Ross Avenue, Dallas, Texas 75202-

2733, (214) 665-2115.
Subject : Revisions to the Texas State Implementation Plan; 30 TAC Chapter 101 –

General Air Quality Rules; Subchapter A – General Rules; Section 101.1 -

Definitions

Contents:

I. Executive Summary

II. Technical Evaluation of SIP Submittals

III. Conclusion
I. Executive Summary

What actions are evaluated in this Technical Support Document?

This technical support document (TSD) reviews portions of four separate revisions to the 

General Air Quality Definitions of the Texas State Implementation Plan (SIP), submitted on June 

10, 2005; August 16, 2007; April 6, 2010; March 11, 2011; and May 26, 2011. This review will 

determine if the changes to the general air quality definitions applicable to the Texas SIP are 

consistent with the requirements of the Clean Air Act and EPA’s policy and guidance.

June 10, 2005

 On May 25, 2005, the Texas Commission on Environmental Quality (TCEQ) adopted 

revisions to 30 TAC Chapter 101, Subchapter A, Section 101.1 to update the general air 

quality definitions to do the following: 1) substantively revise the definitions of 

“maintenance area”, “maintenance plan” and “nonattaintment area” to address the one-hour 

and eight-hour ozone nonattainment designations to reflect the classifications under the 

existing one-hour standard and to add the classifications under the new eight-hour ozone 

standard, 2) substantively revise the definition of “VOC” by deleting the existing list of 

compounds and by referring to the federal definition in 40 CFR §51.100(s), except 

paragraphs (2) - (4), as amended on November 29, 2004 (69 FR 69290 -69304). The federal 

definition includes a special case for the compound t-butyl acetate, which will not be 

considered a VOC for emission limitation or content purposes but will be considered a VOC 

for emissions reporting and inventories and photochemical modeling and 3) multiple nonsubstantive changes to correct for readability, conformity with the drafting standards in the 

Texas Legislative Council Drafting Manual, November 2004, and consistency with other 

commission rules.

 The Chairman of the TCEQ, Ms. Kathleen Hartnett White, submitted these provisions as a 

SIP revision in a letter dated June 10 2005, for rule project number 2005-009-116-PR.

 EPA has acted on subsequent revisions to the definitions of “maintenance area”, 

“maintenance plan” and “nonattainment area” and “VOC”; effectively superceding the June 

10, 2005 submittal of revised definitions. But we have yet to address the non-substantive 

revisions submitted on June 10, 2005.

August 16, 2007

 On July 25, 2007, the TCEQ adopted revisions to 30 TAC Chapter 101, Subchapter A, 

Section 101.1 to update the general air quality definitions to do the following: 1) modify the 

opening paragraph to specify that the definitions apply to all Texas air quality rules, 2) revise 

the definitions of “cold solvent cleaning,” “conveyorized degreasing,” and “open-top vapor 

degreasing” by deleting the word “metal” so that the processes also apply to cleaning nonmetal parts, 3) delete the definitions for “hazardous waste management facility” and 

“hazardous waste management unit” because references to these definitions were not found 

elsewhere in the air rules, 4) renumber the subsequent definitions because of the deletions, 5) 

revise the definition of “high-volume low-pressure spray guns” to specify that the operating 

pressure of the equipment is measured at the air cap, 6) adopt the definition of “nitrogen 

oxides” from Chapter 117 because it is a common term throughout the Texas air quality 

rules, 7) modify the definition of “standard conditions”, and 8) modify the definition of 

“visible emissions”. 
 The Chairman of the TCEQ, Ms. Kathleen Hartnett White, submitted these provisions as a 

SIP revision in a letter dated August 16, 2007, for rule project number 2006-053-101-PR.

 At the same time that TCEQ adopted revisions to the general air quality definitions at 101.1, 

the TCEQ also adopted and submitted the following revisions to EPA on August 16, 2007, as 

part of rule project number 2006-053-101-PR:

o Repeal of 30 TAC 101.22. EPA approved the repeal of 30 TAC 101.22 on July 16, 

2009 at 74 FR 34503.

o Revisions to the Emission Credit Banking and Trading Program (referred to as the 

Emission Reduction Credit (ERC) Program) at 30 TAC Chapter 101, Subchapter H, 

Division 1. EPA approved the revisions to the ERC Program on May 18, 2010 at 75 

FR 27647.

o Revisions to the Mass Emissions Cap and Trade (MECT) program at 30 TAC 

Chapter 101, Subchapter H, Division 3. EPA approved the revisions to the MECT 

Program on July 16, 2009 at 74 FR 34503. 

o Revisions to the Discrete Emission Credit Banking and Trading Program (referred to 

as the Discrete Emission Reduction Credit (DERC) Program) at 30 TAC Chapter 101, 

Subchapter H, Division 4. EPA approved the revisions to the DERC Program on May 

18, 2010 at 75 FR 27644.

o Revisions to the System Cap and Trade (SCT) Program at 30 TAC Chapter 101, 

Subchapter H, Division 5. The TCEQ withdrew the SCT Program from our 

consideration as a SIP revision by letter on May 1, 2001. Further, on March 28, 2012, 

the TCEQ adopted the repeal of the SCT Program. Therefore, the SCT Program as 

revised on August 16, 2007 is no longer before us for review.

 EPA has acted on all portions of the August 16, 2007 submittal with the exception of the 

revisions to the general definitions at 30 TAC 101.1. 

April 6, 2010

 On March 10, 2010, the TCEQ adopted revisions to 30 TAC 101.1 to update the general air 

quality definitions for “reportable quantity” and “volatile organic compound”.

 The Chairman of the TCEQ, Mr. Bryan W. Shaw, Ph.D., submitted these provisions as a SIP 

revision in a letter dated April 6, 2010, for rule project number 2009-006-101-EN.

 At the same time that TCEQ adopted revisions to the general air quality definitions at 30 

TAC 101.1, the TCEQ also adopted and submitted the following revisions to EPA on April 6, 

2010, as part of rule project number 2009-006-101-EN:

o Revisions to the Highly Reactive Volatile Organic Compound Emissions Cap and 

Trade Program (referred to as the HRVOC Emissions Cap and Trade Program or the 

HECT Program) at 30 TAC Chapter 101, Subchapter H, Division 6. EPA is reviewing 

the revisions to the HECT program separately.

 Under the same cover letter on April 6, 2010, the TCEQ also submitted the following 

revisions:

o Revisions to the MECT Program under Rule Project No. 2009-019-101-EN. EPA is 

reviewing the revisions to the MECT program separately.

o Revisions to the Houston/Galveston/Brazoria Attainment Demonstration SIP 

Revision for the 1997 Eight-Hour Ozone Standard. EPA is reviewing these revisions 

separately.
March 11, 2011

 On February 9, 2011, the TCEQ adopted revisions to 30 TAC 101.1 to update the general air 

quality definitions by amending the definitions for “maintenance area,” “nonattainment 

areas” and “reportable quantity”.

 The Chairman of the TCEQ, Mr. Bryan W. Shaw, Ph.D., submitted these revised definitions 

as a SIP revision in a letter dated March 11, 2011 for rule project number 2008-030-116-PR.

 At the same time that TCEQ adopted revisions to the general air quality definitions at 30 

TAC 101.1, the TCEQ also adopted and submitted the following revisions to EPA on March 

11, 2011, as part of rule project number 2008-030-116-PR:

o Amendments to 30 TAC 116.12 – Nonattainment and Prevention of Significant 

Deterioration Review Definitions. EPA approved these amendments on October 25, 

2012 at 77 FR 65119.

o Amendments to 30 TAC 116.150 – New Major Source or Major Modification in 

Ozone Nonattainment Areas. EPA approved these amendments on October 25, 2012 

at 77 FR 65119.

May 26, 2011

 On May 26, 2011, the Chairman of the TCEQ, Mr. Bryan W. Shaw, Ph.D., submitted a 

correction to the definition of “volatile organic compound” at 30 TAC 101.1. This letter 

corrected an error in the definition of “volatile organic compound” as it was adopted on 

February 9, 2011 and submitted as a SIP revision on March 11, 2011.

 EPA approved the definition of “volatile organic compound” as corrected on December 28, 

2011 at 76 FR 81371. 

What is not included in this review?

This TSD will only review the revisions to the general air quality rules at 30 TAC 101.1 that 

have been submitted as a SIP revision. Where the TCEQ also adopted and submitted revisions to 

other parts of the Texas SIP, those revisions will be addressed in separate rulemakings for the 

following reasons.

 Revisions to the HECT Program at 30 TAC Sections 101.390 – 101.394, 101.396, 101.399 –

101.401 adopted on March 10, 2010 and submitted as a revision to the Texas SIP on April 6, 

2010. The HECT program revisions are severable from the general air quality definitions at 

101.1 because they are not germane to the entirety of the Texas air quality control rules and 

program; rather, the HECT program addresses a specific subset of highly reactive VOCs in 

Harris County.
II. Technical Evaluation of the SIP Submittals

The following table provides a line by line comparison of the SIP-approved Definitions at 30 TAC 101.1 and each subsequent revision 

adopted and submitted as a revision to the Texas SIP. EPA’s analysis of the approvability of the revision is provided in italicized font 

immediately following any amendment that is more substantive than renumbering.

30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

Unless specifically defined in the Texas Clean Air Act 

(TCAA) or in the rules of the commission, the terms 

used by the commission have the meanings commonly 

ascribed to them in the field of air pollution control. In 

addition to the terms that are defined by the TCAA, 

the following terms, when used in this chapter, have 

the following meanings, unless the context clearly 

indicates otherwise.

Unless specifically defined in the Texas Clean Air 

Act (TCAA) or in the rules of the commission, the 

terms used by the commission have the meanings 

commonly ascribed to them in the field of air 

pollution control. In addition to the terms that

which are defined by the TCAA, the following 

terms, when used in this chapter, shall have the 

following meanings, unless the context clearly 

indicates otherwise.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now.

Unless specifically 

defined in the Texas 

Clean Air Act (TCAA) or 

in the rules of the 

commission, the terms 

used by the commission 

have the meanings 

commonly ascribed to 

them in the field of air 

pollution control. In 

addition to the terms that 

are defined by the TCAA, 

the following terms, when 

used in this chapter in the 

air quality rules in this 

title, have the following 

meanings, unless the 

context clearly indicates 

otherwise.

This revision is 

approvable. This 

amendment expands the 

scope of the definition to 

cover the entirety of the 

Texas air quality rules 

and programs.

No change from SIPapproved version.No change from SIPapproved version.

1. Account--For those sources required to be 

permitted under Chapter 122 of this title 

(relating to Federal Operating Permits), all 

sources that are aggregated as a site. For all 

other sources, any combination of sources under 

common ownership or control and located on 

one or more contiguous properties, or properties 

contiguous except for intervening roads, 

railroads, rights-of-way, waterways, or similar 

Account--For those sources required to be 

permitted under Chapter 122 of this title (relating to 

Federal Operating Permits), all sources that which 

are aggregated as a site. For all other sources, any 

combination of sources under common ownership 

or control and located on one or more contiguous 

properties, or properties contiguous except for 

intervening roads, railroads, rights-of-way, 

waterways, or similar divisions.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

divisions.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now.

1. Acid gas flare--A flare used exclusively for the 

incineration of hydrogen sulfide and other acidic 

gases derived from natural gas sweetening 

processes.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

2. Agency established facility identification 

number--For the purposes of Subchapter F of 

this chapter (relating to Emissions Events and 

Scheduled Maintenance, Startup, and Shutdown 

Activities), a unique alphanumeric code required 

to be assigned by the owner or operator of a 

regulated entity that the emission inventory 

reporting requirements of §101.10 of this title 

(relating to Emissions Inventory Requirements) 

are applicable to each facility at that regulated 

entity.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

3. Ambient air--That portion of the atmosphere, 

external to buildings, to which the general public 

has access.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

4. Background--Background concentration, the 

level of air contaminants that cannot be reduced 

by controlling emissions from man-made 

sources. It is determined by measuring levels in 

non-urban areas.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

5. Boiler--Any combustion equipment fired with 

solid, liquid, and/or gaseous fuel used to produce 

steam or to heat water.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

6. Capture system--All equipment (including, but 

not limited to, hoods, ducts, fans, booths, ovens, 

dryers, etc.) that contains, collects, and 

transports an air pollutant to a control device.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

7. Captured facility--A manufacturing or 

production facility that generates an industrial 

solid waste or hazardous waste that is routinely 

stored, processed, or disposed of on a shared 

basis in an integrated waste management unit 

owned, operated by, and located within a 

contiguous manufacturing complex.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

8. Carbon adsorber--An add-on control device 

that uses activated carbon to adsorb volatile 

Carbon adsorber--An add-on control device that

which uses activated carbon to adsorb volatile 

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

organic compounds from a gas stream. organic compounds from a gas stream.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(7). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

9. Carbon adsorption system--A carbon adsorber 

with an inlet and outlet for exhaust gases and a 

system to regenerate the saturated adsorbent.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

10. Coating--A material applied onto or 

impregnated into a substrate for protective, 

decorative, or functional purposes. Such 

materials include, but are not limited to, paints, 

varnishes, sealants, adhesives, thinners, diluents, 

inks, maskants, and temporary protective 

coatings.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

11. Cold solvent cleaning--A batch process that 

uses liquid solvent to remove soils from the 

surfaces of metal parts or to dry the parts by 

spraying, brushing, flushing, and/or immersion 

while maintaining the solvent below its boiling 

point. Wipe cleaning (hand cleaning) is not 

included in this definition.

Definition not revised in the June 10, 2005 

submittal.

12. Cold solvent 

cleaning--A batch 

process that uses 

liquid solvent to 

remove soils from 

the surfaces of metal 

parts or to dry the 

parts by spraying, 

brushing, flushing, 

and/or immersion 

while maintaining 

the solvent below its 

boiling point. Wipe 

cleaning (hand 

cleaning) is not 

included in this 

definition.

This revision is 

approvable. This 

amendment expands the 

scope of the definition to 

non-metal parts.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

13. Combustion unit--Any boiler plant, furnace, 

incinerator, flare, engine, or other device or 

system used to oxidize solid, liquid, or gaseous 

fuels, but excluding motors and engines used in 

propelling land, water, and air vehicles.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

14. Combustion turbine--Any gas turbine system 

that is gas and/or liquid fuel fired with or 

without power augmentation. This unit is either 

attached to a foundation or is portable, 

equipment operated at a specific minor or major 

source for more than 90 days in any 12-month 

period. Two or more gas turbines powering one 

shaft will be treated as one unit.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

15. Commercial hazardous waste management 

facility--Any hazardous waste management 

facility that accepts hazardous waste or 

polychlorinated biphenyl compounds for a 

charge, except a captured facility that disposes 

only waste generated on-site or a facility that 

accepts waste only from other facilities owned or 

effectively controlled by the same person.

Commercial hazardous waste management 

facility--Any hazardous waste management facility 

that which accepts hazardous waste or 

polychlorinated biphenyl compounds for a charge, 

except a captured facility that disposes only waste 

generated on-site or a facility that accepts waste 

only from other facilities owned or effectively 

controlled by the same person.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(12). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

16. Commercial incinerator--An incinerator used 

to dispose of waste material from retail and 

wholesale trade establishments.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

17. Commercial medical waste incinerator--A 

facility that accepts for incineration medical 

waste generated outside the property boundaries 

of the facility.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

18. Component--A piece of equipment, including, 

but not limited to, pumps, valves, compressors, 

and pressure relief valves that has the potential 

to leak volatile organic compounds.

Component--A piece of equipment, including, but 

not limited to, pumps, valves, compressors, and 

pressure relief valves that which has the potential 

to leak volatile organic compounds.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(15). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

19. Condensate--Liquids that result from the 

cooling and/or pressure changes of produced 

natural gas. Once these liquids are processed at 

gas plants or refineries or in any other manner, 

they are no longer considered condensates.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

20. Construction-demolition waste--Waste 

resulting from construction or demolition 

projects.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

21. Control system or control device--Any part, 

chemical, machine, equipment, contrivance, or 

combination of same, used to destroy, eliminate, 

reduce, or control the emission of air 

contaminants to the atmosphere.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

22. Conveyorized degreasing--A solvent cleaning 

process that uses an automated parts handling 

system, typically a conveyor, to automatically 

provide a continuous supply of metal parts to be 

cleaned or dried using either cold solvent or 

vaporized solvent. A conveyorized degreasing 

process is fully enclosed except for the conveyor 

inlet and exit portals.

Definition not revised in the June 10, 2005 

submittal.

22. Conveyorized 

degreasing--A 

solvent cleaning 

process that uses an 

automated parts 

handling system, 

typically a conveyor, 

to automatically 

provide a continuous 

supply of metal parts 

to be cleaned or 

dried using either 

cold solvent or 

vaporized solvent. A 

conveyorized 

degreasing process 

is fully enclosed 

except for the 

conveyor inlet and 

exit portals.

This revision is 

approvable. This 

amendment expands the 

scope of the definition to 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

non-metal parts.

23. Criteria pollutant or standard--Any pollutant 

for which there is a national ambient air quality 

standard established under 40 Code of Federal 

Regulations Part 50.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

24. Custody transfer--The transfer of produced 

crude oil and/or condensate, after processing 

and/or treating in the producing operations, from 

storage tanks or automatic transfer facilities to 

pipelines or any other forms of transportation.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

25. De minimis impact--A change in ground level 

concentration of an air contaminant as a result of 

the operation of any new major stationary source 

or of the operation of any existing source that 

has undergone a major modification that does 

not exceed the following specified amounts.

SEE Figure: 30 TAC §101.1(25)

AIR 

CONT.

ANN. 24-

HR

8-HR 3-HR 1-HR

Inhalable 

Particulate 

Matter 

(PM10)

1.0 

g/m3

5.0 

g/m3

Sulfur 

Dioxide

1.0 

g/m3

5.0 

g/m3

25 

g/m3

Nitrogen 

Dioxide

1.0 

g/m3

Carbon 

Monoxide

0.5 

mg/m3

2 

mg/m3

De minimis impact--A change in ground level 

concentration of an air contaminant as a result of 

the operation of any new major stationary source or 

of the operation of any existing source that which 

has undergone a major modification that does not 

exceed the following specified amounts.

SEE Figure: 30 TAC §101.1(25)

AIR 

CONT.

ANN. 24-

HR

8-HR 3-HR 1-HR

Inhalable 

Particulate 

Matter 

(PM10)

1.0 

g/m3

5.0 

g/m3

Sulfur 

Dioxide

1.0 

g/m3

5.0 

g/m3

25 

g/m3

Nitrogen 

Dioxide

1.0 

g/m3

Carbon 

Monoxide

0.5 

mg/m3

2 

mg/m3

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(22). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

26. Domestic wastes--The garbage and rubbish 

normally resulting from the functions of life 

within a residence.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

27. Emissions banking--A system for recording 

emissions reduction credits so they may be used 

or transferred for future use.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

28. Emissions event--Any upset event or Definition not revised in the June 10, 2005 No change from SIP- No change from SIP- No change from SIP-
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

unscheduled maintenance, startup, or shutdown 

activity, from a common cause that results in 

unauthorized emissions of air contaminants from 

one or more emissions points at a regulated 

entity.

submittal. approved version. approved version. approved version.

29. Emissions reduction credit--Any stationary 

source emissions reduction that has been banked 

in accordance with Chapter 101, Subchapter H, 

Division 1 of this title (relating to Emission 

Credit Banking and Trading).

Emissions reduction credit--Any stationary source 

emissions reduction that which has been banked in 

accordance with Chapter 101, Subchapter H, 

Division 1 of this title (relating to Emission Credit 

Banking and Trading).

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(26). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

30. Emissions reduction credit certificate--The 

certificate issued by the executive director that 

indicates the amount of qualified reduction 

available for use as offsets and the length of time 

the reduction is eligible for use.

Emissions reduction credit certificate--The 

certificate issued by the executive director that

which indicates the amount of qualified reduction 

available for use as offsets and the length of time 

the reduction is eligible for use.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(27). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

31. Emissions unit--Any part of a stationary source 

that emits, or would have the potential to emit, 

any pollutant subject to regulation under the 

Federal Clean Air Act.

Emissions unit--Any part of a stationary source 

director that which emits, or would have the 

potential to emit, any pollutant subject to regulation 

under the Federal Clean Air Act FCAA.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

definition was numbered as 101.1(28). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

32. Excess opacity event--When an opacity reading 

is equal to or exceeds 15 additional percentage 

points above an applicable opacity limit, 

averaged over a six-minute period.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

33. Exempt solvent--Those carbon compounds or 

mixtures of carbon compounds used as solvents 

that have been excluded from the definition of 

volatile organic compound.

Exempt solvent--Those carbon compounds or 

mixtures of carbon compounds used as solvents that

which have been excluded from the definition of 

volatile organic compound.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(29). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

34. External floating roof--A cover or roof in an 

open top tank that rests upon or is floated upon 

the liquid being contained and is equipped with a 

single or double seal to close the space between 

the roof edge and tank shell. A double seal 

consists of two complete and separate closure 

seals, one above the other, containing an 

enclosed space between them.

External floating roof--A cover or roof in an open 

top tank that which rests upon or is floated upon the 

liquid being contained and is equipped with a single 

or double seal to close the space between the roof 

edge and tank shell. A double seal consists of two 

complete and separate closure seals, one above the 

other, containing an enclosed space between them.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(30). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

35. Federal motor vehicle regulation--Control of 

Air Pollution from Motor Vehicles and Motor 

Vehicle Engines, 40 Code of Federal 

Regulations Part 85.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

36. Federally enforceable--All limitations and 

conditions that are enforceable by the United 

Federally enforceable--All limitations and 

conditions that which are enforceable by the United 

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

States Environmental Protection Agency 

administrator, including those requirements 

developed under 40 Code of Federal Regulations 

(CFR) Parts 60 and 61; requirements within any 

applicable state implementation plan (SIP); and 

any permit requirements established under 40 

CFR §52.21 or under regulations approved under 

40 CFR Part 51, Subpart 1, including operating 

permits issued under the approved program that 

is incorporated into the SIP and that expressly 

requires adherence to any permit issued under 

such program.

States Environmental Protection Agency EPA 

administrator, including those requirements 

developed under 40 Code of Federal Regulations 

(CFR) Parts 60 and 61; requirements within any 

applicable state implementation plan (SIP); and any 

permit requirements established under 40 CFR 

§52.21 or under regulations approved under 40 

CFR Part 51, Subpart 1, including operating permits 

issued under the approved program that is 

incorporated into the SIP and that expressly 

requires adherence to any permit issued under such 

program.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(32). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

37. Flare--An open combustion unit (i.e., lacking an 

enclosed combustion chamber) whose 

combustion air is provided by uncontrolled 

ambient air around the flame, and that is used as 

a control device. A flare may be equipped with a 

radiant heat shield (with or without a refractory 

lining), but is not equipped with a flame air 

control damping system to control the air/fuel 

mixture. In addition, a flare may also use 

auxiliary fuel. The combustion flame may be 

elevated or at ground level. A vapor combustor, 

as defined in this section, is not considered a 

flare.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

38. Fuel oil--Any oil meeting the American Society 

for Testing and Materials (ASTM) specifications 

for fuel oil in ASTM D396-01, Standard 

Specifications for Fuel Oils, revised 2001. This 

includes fuel oil grades 1, 1 (Low Sulfur), 2, 2 

(Low Sulfur), 4 (Light), 4, 5 (Light), 5 (Heavy), 

and 6.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

39. Fugitive emission--Any gaseous or particulate 

contaminant entering the atmosphere that could 

not reasonably pass through a stack, chimney, 

Fugitive emission--Any gaseous or particulate 

contaminant entering the atmosphere that which

could not reasonably pass through a stack, chimney, 

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

vent, or other functionally equivalent opening 

designed to direct or control its flow.

vent, or other functionally equivalent opening 

designed to direct or control its flow.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(35). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

40. Garbage--Solid waste consisting of putrescible 

animal and vegetable waste materials resulting 

from the handling, preparation, cooking, and 

consumption of food, including waste materials 

from markets, storage facilities, and handling 

and sale of produce and other food products.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

41. Gasoline--Any petroleum distillate having a 

Reid vapor pressure of four pounds per square 

inch (27.6 kilopascals) or greater that is 

produced for use as a motor fuel, and is 

commonly called gasoline.

Definition not revised in the June 10, 2005 

submittal.

No change from SIPapproved version.No change from SIPapproved version.No change from SIPapproved version.

42. Hazardous waste management facility--All 

contiguous land, including structures, 

appurtenances, and other improvements on the 

land, used for processing, storing, or disposing 

of hazardous waste. The term includes a publicly 

or privately owned hazardous waste 

management facility consisting of processing, 

storage, or disposal operational hazardous waste 

management units such as one or more landfills, 

surface impoundments, waste piles, incinerators, 

boilers, and industrial furnaces, including 

cement kilns, injection wells, salt dome waste 

containment caverns, land treatment facilities, or 

a combination of units.

Definition not revised in the June 10, 2005 

submittal.

DELETE

This deletion is 

approvable because the 

term is not used elsewhere 

in the Texas air quality 

rules or programs.

REMOVED FROM SIP 

IN AUGUST 16, 2007 

SUBMITTAL

REMOVED FROM SIP IN 

AUGUST 16, 2007 

SUBMITTAL

43. Hazardous waste management unit--A 

landfill, surface impoundment, waste pile, boiler, 

industrial furnace, incinerator, cement kiln, 

injection well, container, drum, salt dome waste 

containment cavern, or land treatment unit, or 

any other structure, vessel, appurtenance, or 

other improvement on land used to manage 

hazardous waste.

Definition not revised in the June 10, 2005 

submittal.

DELETE

This deletion is 

approvable because the 

term is not used elsewhere 

in the Texas air quality 

rules or programs.

REMOVED FROM SIP 

IN AUGUST 16, 2007 

SUBMITTAL

REMOVED FROM SIP IN 

AUGUST 16, 2007 

SUBMITTAL
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

44. Hazardous wastes--Any solid waste identified 

or listed as a hazardous waste by the 

administrator of the United States Environmental 

Protection Agency under the federal Solid Waste 

Disposal Act, as amended by Resource 

Conservation and Recovery Act, 42 United 

States Code, §§6901 et seq., as amended.

Definition not revised in the June 10, 2005 

submittal.

42. Hazardous wastes--

Any solid waste 

identified or listed as 

a hazardous waste 

by the administrator 

of the United States 

Environmental 

Protection Agency 

under the federal 

Solid Waste 

Disposal Act, as 

amended by 

Resource 

Conservation and 

Recovery Act, 42 

United States Code, 

§§6901 et seq., as 

amended.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

45. Heatset (used in offset lithographic printing)--

Any operation where heat is required to 

evaporate ink oil from the printing ink. Hot air 

dryers are used to deliver the heat.

Definition not revised in the June 10, 2005 

submittal.

43. Heatset (used in 

offset lithographic 

printing)--Any 

operation where heat 

is required to 

evaporate ink oil 

from the printing 

ink. Hot air dryers 

are used to deliver 

the heat.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

46. High-bake coatings--Coatings designed to cure 

at temperatures above 194 degrees Fahrenheit.

Definition not revised in the June 10, 2005 

submittal.

44. High-bake 

coatings--Coatings 

designed to cure at 

temperatures above 

194 degrees 

Fahrenheit.

No change from SIPapproved version other 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

than renumbering.

47. High-volume low-pressure spray guns--

Equipment used to apply coatings by means of a 

spray gun that operates between 0.1 and 10.0 

pounds per square inch gauge air pressure.

High-volume low-pressure spray guns--

Equipment used to apply coatings by means of a 

spray gun that which operates between 0.1 and 10.0 

pounds per square inch gauge air pressure.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(43). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

45. High-volume lowpressure spray 

guns--Equipment 

used to apply 

coatings by means 

of a spray gun that 

operates between 0.1 

and 10.0 pounds per 

square inch gauge 

air pressure

measured at the air 

cap.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

48. Incinerator--An enclosed combustion apparatus 

and attachments that is used in the process of 

burning wastes for the primary purpose of 

reducing its volume and weight by removing the 

combustibles of the waste and is equipped with a 

flue for conducting products of combustion to 

the atmosphere. Any combustion device that 

burns 10% or more of solid waste on a total 

British thermal unit (Btu) heat input basis 

averaged over any one-hour period is considered 

to be an incinerator. A combustion device 

without instrumentation or methodology to 

determine hourly flow rates of solid waste and 

burning 1.0% or more of solid waste on a total 

Btu heat input basis averaged annually is also 

considered to be an incinerator. An open-trench 

type (with closed ends) combustion unit may be 

considered an incinerator when approved by the 

executive director. Devices burning untreated 

wood scraps, waste wood, or sludge from the 

treatment of wastewater from the process mills 

as a primary fuel for heat recovery are not 

included under this definition. Combustion 

devices permitted under this title as combustion 

devices other than incinerators will not be 

considered incinerators for application of any 

rule within this title provided they are installed 

and operated in compliance with the condition of 

all applicable permits.

Incinerator--An enclosed combustion apparatus 

and attachments that which is used in the process 

of burning wastes for the primary purpose of 

reducing its volume and weight by removing the 

combustibles of the waste and which is equipped 

with a flue for conducting products of combustion 

to the atmosphere. Any combustion device that

which burns 10% or more of solid waste on a total 

British thermal unit (Btu) heat input basis averaged 

over any one-hour period is shall be considered to 

be an incinerator. A combustion device without 

instrumentation or methodology to determine 

hourly flow rates of solid waste and burning 1.0% 

or more of solid waste on a total Btu heat input 

basis averaged annually is shall also be considered 

to be an incinerator. An open-trench type (with 

closed ends) combustion unit may be considered 

an incinerator when approved by the executive 

director. Devices burning untreated wood scraps, 

waste wood, or sludge from the treatment of 

wastewater from the process mills as a primary 

fuel for heat recovery are not included under this 

definition. Combustion devices permitted under 

this title as combustion devices other than 

incinerators will not be considered incinerators for 

application of any rule within this title provided 

they are installed and operated in compliance with 

the condition of all applicable permits.

These revisions are non-substantive in nature and 

46. Incinerator--An 

enclosed combustion 

apparatus and 

attachments that is 

used in the process 

of burning wastes 

for the primary 

purpose of reducing 

its volume and 

weight by removing 

the combustibles of 

the waste and is 

equipped with a flue 

for conducting 

products of 

combustion to the 

atmosphere. Any 

combustion device 

that burns 10% or 

more of solid waste 

on a total British 

thermal unit (Btu) 

heat input basis 

averaged over any 

one-hour period is 

considered to be an 

incinerator. A 

combustion device 

without 

instrumentation or 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(44). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

methodology to 

determine hourly 

flow rates of solid 

waste and burning 

1.0% or more of 

solid waste on a 

total Btu heat input 

basis averaged 

annually is also 

considered to be an 

incinerator. An 

open-trench type 

(with closed ends) 

combustion unit 

may be considered 

an incinerator when 

approved by the 

executive director. 

Devices burning 

untreated wood 

scraps, waste wood, 

or sludge from the 

treatment of 

wastewater from the 

process mills as a 

primary fuel for heat 

recovery are not 

included under this 

definition. 

Combustion devices 

permitted under this 

title as combustion 

devices other than 

incinerators will not 

be considered 

incinerators for 

application of any 

rule within this title 

provided they are 

installed and 

operated in 

compliance with the 

condition of all

applicable permits.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

No change from SIPapproved version other 

than renumbering.

49. Industrial boiler--A boiler located on the site of 

a facility engaged in a manufacturing process 

where substances are transformed into new 

products, including the component parts of 

products, by mechanical or chemical processes.

Definition not revised in the June 10, 2005 

submittal.

47. Industrial boiler--A 

boiler located on the 

site of a facility 

engaged in a 

manufacturing 

process where 

substances are 

transformed into 

new products, 

including the 

component parts of 

products, by 

mechanical or 

chemical processes.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

50. Industrial furnace--Cement kilns; lime kilns; 

aggregate kilns; phosphate kilns; coke ovens; 

blast furnaces; smelting, melting, or refining 

furnaces, including pyrometallurgical devices 

such as cupolas, reverberator furnaces, sintering 

machines, roasters, or foundry furnaces; titanium 

dioxide chloride process oxidation reactors; 

methane reforming furnaces; pulping recovery 

furnaces; combustion devices used in the 

recovery of sulfur values from spent sulfuric 

acid; and other devices the commission may list.

Industrial furnace--Cement kilns; , lime kilns; , 

aggregate kilns; , phosphate kilns; , coke ovens; ,

blast furnaces; , smelting, melting, or refining 

furnaces, including pyrometallurgical devices such 

as cupolas, reverberator furnaces, sintering 

machines, roasters, or foundry furnaces; , titanium 

dioxide chloride process oxidation reactors; ,

methane reforming furnaces; , pulping recovery 

furnaces; , combustion devices used in the 

recovery of sulfur values from spent sulfuric acid; ,

and other devices the commission may list.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(46). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

48. Industrial furnace-

-Cement kilns; lime 

kilns; aggregate 

kilns; phosphate 

kilns; coke ovens; 

blast furnaces; 

smelting, melting, or 

refining furnaces, 

including 

pyrometallurgical 

devices such as 

cupolas, 

reverberator 

furnaces, sintering 

machines, roasters, 

or foundry furnaces; 

titanium dioxide 

chloride process 

oxidation reactors; 

methane reforming 

furnaces; pulping 

recovery furnaces; 

combustion devices 

used in the recovery 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

of sulfur values from 

spent sulfuric acid; 

and other devices 

the commission may 

list.

No change from SIPapproved version other 

than renumbering.

51. Industrial solid waste--Solid waste resulting 

from, or incidental to, any process of industry or 

manufacturing, or mining or agricultural 

operations, classified as follows.

(A) Class 1 industrial solid waste or Class 

1 waste is any industrial solid waste designated 

as Class 1 by the executive director as any 

industrial solid waste or mixture of industrial 

solid wastes that because of its concentration or 

physical or chemical characteristics is toxic, 

corrosive, flammable, a strong sensitizer or 

irritant, a generator of sudden pressure by 

decomposition, heat, or other means, and may 

pose a substantial present or potential danger to 

human health or the environment when 

improperly processed, stored, transported, or 

otherwise managed, including hazardous 

industrial waste, as defined in §335.1 and 

§335.505 of this title (relating to Definitions and 

Class 1 Waste Determination).

(B) Class 2 industrial solid waste is any 

individual solid waste or combination of 

industrial solid wastes that cannot be described 

as Class 1 or Class 3, as defined in §335.506 of 

this title (relating to Class 2 Waste 

Determination).

(C) Class 3 industrial solid waste is any 

inert and essentially insoluble industrial solid 

waste, including materials such as rock, brick, 

glass, dirt, and certain plastics and rubber, etc., 

that are not readily decomposable as defined in 

§335.507 of this title (relating to Class 3 Waste 

Determination).

Definition not revised in the June 10, 2005 

submittal.

49. Industrial solid 

waste--Solid waste 

resulting from, or 

incidental to, any 

process of industry 

or manufacturing, or 

mining or 

agricultural 

operations, 

classified as follows.

(A) Class 1 

industrial solid 

waste or Class 1 

waste is any 

industrial solid 

waste designated as 

Class 1 by the 

executive director as 

any industrial solid 

waste or mixture of 

industrial solid 

wastes that because 

of its concentration 

or physical or 

chemical 

characteristics is 

toxic, corrosive, 

flammable, a strong 

sensitizer or irritant, 

a generator of 

sudden pressure by 

decomposition, heat, 

or other means, and 

may pose a 

substantial present 

or potential danger 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 

– Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

to human health or 

the environment 

when improperly 

processed, stored, 

transported, or 

otherwise managed, 

including hazardous 

industrial waste, as 

defined in §335.1 

and §335.505 of this 

title (relating to 

Definitions and 

Class 1 Waste 

Determination).

(B) Class 2 

industrial solid 

waste is any 

individual solid 

waste or 

combination of 

industrial solid 

wastes that cannot 

be described as 

Class 1 or Class 3, 

as defined in 

§335.506 of this title 

(relating to Class 2 

Waste 

Determination).

(C) Class 3 

industrial solid 

waste is any inert 

and essentially 

insoluble industrial 

solid waste, 

including materials 

such as rock, brick, 

glass, dirt, and 

certain plastics and 

rubber, etc., that are 

not readily 

decomposable as 

defined in §335.507 

of this title (relating 

to Class 3 Waste 
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

Determination).

No change from SIPapproved version other 

than renumbering.

52. Internal floating cover--A cover or floating 

roof in a fixed roof tank that rests upon or is 

floated upon the liquid being contained, and is 

equipped with a closure seal or seals to close the 

space between the cover edge and tank shell.

Internal floating cover--A cover or floating roof in 

a fixed roof tank that which rests upon or is floated 

upon the liquid being contained, and is equipped 

with a closure seal or seals to close the space 

between the cover edge and tank shell.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(48). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

50. Internal floating 

cover--A cover or 

floating roof in a 

fixed roof tank that 

rests upon or is 

floated upon the 

liquid being 

contained, and is 

equipped with a 

closure seal or seals 

to close the space 

between the cover 

edge and tank shell.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

53. Leak--A volatile organic compound 

concentration greater than 10,000 parts per 

million by volume or the amount specified by 

applicable rule, whichever is lower; or the 

dripping or exuding of process fluid based on 

sight, smell, or sound.

Definition not revised in the June 10, 2005 

submittal.

51. Leak--A volatile 

organic compound 

concentration 

greater than 10,000 

parts per million by 

volume or the 

amount specified by 

applicable rule, 

whichever is lower; 

or the dripping or 

exuding of process 

fluid based on sight, 

smell, or sound.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

54. Liquid fuel--A liquid combustible mixture, not 

derived from hazardous waste, with a heating 

value of at least 5,000 British thermal units per 

pound.

Definition not revised in the June 10, 2005 

submittal.

52. Liquid fuel--

A liquid 

combustible 

mixture, not derived 

from hazardous 

waste, with a 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

heating value of at 

least 5,000 British 

thermal units per 

pound.

No change from SIPapproved version other 

than renumbering.

55. Liquid-mounted seal--A primary seal mounted 

in continuous contact with the liquid between the 

tank wall and the floating roof around the 

circumference of the tank.

Definition not revised in the June 10, 2005 

submittal.

53. Liquid-mounted 

seal--A primary seal 

mounted in 

continuous contact 

with the liquid 

between the tank 

wall and the floating 

roof around the 

circumference of the 

tank.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

56. TXd132 (54) Maintenance area--A 

geographic region of the state previously 

designated nonattainment under the Federal 

Clean Air Act Amendments of 1990 and 

subsequently redesignated to attainment subject 

to the requirement to develop a maintenance 

plan under 42 United States Code, §7505a, as 

described in 40 Code of Federal Regulations Part 

81and in pertinent Federal Register notices.

Maintenance area--A geographic region of the 

state previously designated nonattainment under the 

Federal Clean Air Act FCAA Amendments of 1990 

and subsequently redesignated to attainment subject 

to the requirement to develop a maintenance plan 

under 42 United States Code, §7505a,FCAA, 

§175A, as amended as described in 40 Code of 

Federal Regulations Part 81and in pertinent Federal 

Register notices.

On December 28, 2011, EPA SIP-approved the

definition of “maintenance area” as adopted by 

TCEQ February 9, 2011, effective March 3, 

2011,submitted to EPA March 11, 2011. 

See 76 FR 81371,effective January 27, 2012. 

EPA-R06-OAR-2008-0638.This approval of the 

definition of maintenance area includes the 

substantive changes submitted in 2005.

54. Maintenance area--

A geographic region 

of the state 

previously 

designated 

nonattainment under 

the Federal Clean 

Air Act 

Amendments of 

1990 and 

subsequently 

redesignated to 

attainment subject to 

the requirement to 

develop a 

maintenance plan 

under 42 United 

States Code, 

§7505a, as described 

in 40 Code of 

Federal Regulations 

Part 81and in 

pertinent Federal 

54. Maintenance area--

A geographic region 

of the state 

previously 

designated 

nonattainment under 

the Federal Clean 

Air Act Amendments 

of 1990 and 

subsequently 

redesignated to 

attainment subject to 

the requirement to 

develop a 

maintenance plan 

under 42 United 

States Code, §7505a, 

as described in 40 

Code of Federal 

Regulations Part 

81and in pertinent 

Federal Register 

notices.

54. Maintenance area--

A geographic region 

of the state previously

designated 

nonattainment under 

the Federal Clean Air 

Act Amendments of 

1990 and 

subsequently 

redesignated to 

attainment subject to 

the requirement to 

develop a 

maintenance plan 

under 42 United 

States Code, §7505a, 

as described in 40 

Code of Federal 

Regulations Part 

81and in pertinent 

Federal Register 

notices.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

Register notices.

On December 28, 2011, 

EPA SIP-approved the

definition of 

“maintenance area” as 

adopted by TCEQ 

February 9, 2011, 

effective March 3, 

2011,submitted to EPA 

March 11, 2011. 

See 76 FR 81371,effective 

January 27, 2012. 

EPA-R06-OAR-2008-

0638.

On December 28, 2011, 

EPA SIP-approved the

definition of “maintenance 

area” as adopted by 

TCEQ February 9, 2011, 

effective March 3, 

2011,submitted to EPA 

March 11, 2011. 

See 76 FR 81371,effective 

January 27, 2012. 

EPA-R06-OAR-2008-

0638.

On December 28, 2011, 

EPA SIP-approved the

definition of “maintenance 

area” as adopted by TCEQ 

February 9, 2011, effective 

March 3, 2011,submitted to 

EPA March 11, 2011. 

See 76 FR 81371,effective 

January 27, 2012. 

EPA-R06-OAR-2008-0638.

57. Maintenance plan--A revision to the applicable 

state implementation plan, meeting the 

requirements of 42 United States Code, §7505a.

Maintenance plan--A revision to the applicable 

state implementation plan, meeting the 

requirements of 42 United States Code, §7505a

FCAA, §175A.

EPA approved the substantive revision to 

“maintenance plan” on November 10, 2010 final 

rule.

55. Maintenance plan--

A revision to the 

applicable state 

implementation 

plan, meeting the 

requirements of 42 

United States Code, 

§7505a.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

58. Marine vessel--Any watercraft used, or capable 

of being used, as a means of transportation on 

water, and that is constructed or adapted to 

carry, or that carries, oil, gasoline, or other 

volatile organic liquid in bulk as a cargo or cargo 

residue.

Definition not revised in the June 10, 2005 

submittal.

56. Marine vessel--Any 

watercraft used, or 

capable of being 

used, as a means of 

transportation on 

water, and that is 

constructed or 

adapted to carry, or 

that carries, oil, 

gasoline, or other 

volatile organic 

liquid in bulk as a 

cargo or cargo 

residue.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

59. Mechanical shoe seal--A metal sheet that is 

held vertically against the storage tank wall by 

springs or weighted levers and is connected by 

braces to the floating roof. A flexible coated 

fabric (envelope) spans the annular space 

between the metal sheet and the floating roof.

Mechanical shoe seal--A metal sheet that which is 

held vertically against the storage tank wall by 

springs or weighted levers and is connected by 

braces to the floating roof. A flexible coated fabric 

(envelope) spans the annular space between the 

metal sheet and the floating roof.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(55). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

57. Mechanical shoe 

seal--A metal sheet 

that is held vertically 

against the storage 

tank wall by springs 

or weighted levers 

and is connected by 

braces to the floating 

roof. A flexible 

coated fabric 

(envelope) spans the 

annular space 

between the metal 

sheet and the 

floating roof.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

60. Medical waste--Waste materials identified by 

the Department of State Health Services as 

"special waste from health care-related facilities" 

and those waste materials commingled and 

discarded with special waste from health carerelated facilities.

Medical waste--Waste materials identified by the 

Department of State Health Services Texas 

Department of Health as "special waste from health 

care-related facilities" and those waste materials 

commingled and discarded with special waste from 

health care-related facilities.

EPA approved the substantive revision to 

“maintenance plan” on November 10, 2010 final 

rule.

58. Medical waste--

Waste materials

identified by the 

Department of State 

Health Services as 

"special waste from 

health care-related 

facilities" and those 

waste materials 

commingled and 

discarded with 

special waste from 

health care-related 

facilities.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

61. Metropolitan Planning Organization--That 

organization designated as being responsible, 

together with the state, for conducting the 

continuing, cooperative, and comprehensive 

planning process under 23 United States Code 

(USC), §134 and 49 USC, §1607.

Definition not revised in the June 10, 2005 

submittal.

59. Metropolitan 

Planning 

Organization--That 

organization 

designated as being 

responsible, together 

with the state, for 

conducting the 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

continuing, 

cooperative, and 

comprehensive 

planning process 

under 23 United 

States Code (USC), 

§134 and 49 USC, 

§1607.

No change from SIPapproved version other 

than renumbering.

62. Mobile emissions reduction credit--The credit 

obtained from an enforceable, permanent, 

quantifiable, and surplus (to other federal and 

state rules) emissions reduction generated by a 

mobile source as set forth in Chapter 114, 

Subchapter E or F of this title (relating to Low 

Emission Vehicle Fleet Requirements and 

Vehicle Retirement and Mobile Emission 

Reduction Credits), and that has been banked in 

accordance with Subchapter H, Division 1 of 

this chapter.

Definition not revised in the June 10, 2005 

submittal.

60. Mobile emissions 

reduction credit--

The credit obtained 

from an enforceable, 

permanent, 

quantifiable, and 

surplus (to other 

federal and state 

rules) emissions 

reduction generated 

by a mobile source 

as set forth in 

Chapter 114, 

Subchapter E or F of 

this title (relating to

Low Emission 

Vehicle Fleet 

Requirements and

Vehicle Retirement 

and Mobile 

Emission Reduction 

Credits), and that 

has been banked in 

accordance with 

Subchapter H, 

Division 1 of this 

chapter.

This revision is 

approvable. The 

amendment removes an 

obsolete cross-reference.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

63. Motor vehicle--A self-propelled vehicle Definition not revised in the June 10, 2005 61. Motor vehicle--A No change from the No change from the revised 
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

designed for transporting persons or property on 

a street or highway.

submittal. self-propelled 

vehicle designed for 

transporting persons 

or property on a 

street or highway.

No change from SIPapproved version other 

than renumbering.

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

definition submitted as a 

SIP revision on August 16, 

2007.

64. Motor vehicle fuel dispensing facility--Any 

site where gasoline is dispensed to motor vehicle 

fuel tanks from stationary storage tanks.

Definition not revised in the June 10, 2005 

submittal.

62. Motor vehicle fuel 

dispensing facility--

Any site where 

gasoline is 

dispensed to motor 

vehicle fuel tanks 

from stationary 

storage tanks.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

65. Municipal solid waste--Solid waste resulting 

from, or incidental to, municipal, community, 

commercial, institutional, and recreational 

activities, including garbage, rubbish, ashes, 

street cleanings, dead animals, abandoned 

automobiles, and all other solid waste except 

industrial solid waste.

Definition not revised in the June 10, 2005 

submittal.

63. Municipal solid 

waste--Solid waste 

resulting from, or 

incidental to, 

municipal, 

community, 

commercial, 

institutional, and 

recreational 

activities, including 

garbage, rubbish, 

ashes, street 

cleanings, dead 

animals, abandoned 

automobiles, and all 

other solid waste 

except industrial 

solid waste.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

66. Municipal solid waste facility--All contiguous 

land, structures, other appurtenances, and 

Definition not revised in the June 10, 2005 

submittal.

64. Municipal solid 

waste facility--All 

No change from the 

revised definition 

No change from the revised 

definition submitted as a 
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

improvements on the land used for processing, 

storing, or disposing of solid waste. A facility 

may be publicly or privately owned and may 

consist of several processing, storage, or 

disposal operational units, e.g., one or more 

landfills, surface impoundments, or 

combinations of them.

contiguous land, 

structures, other 

appurtenances, and 

improvements on 

the land used for 

processing, storing, 

or disposing of solid 

waste. A facility 

may be publicly or 

privately owned and 

may consist of 

several processing, 

storage, or disposal 

operational units, 

e.g., one or more 

landfills, surface 

impoundments, or 

combinations of 

them.

No change from SIPapproved version other 

than renumbering.

submitted as a SIP 

revision on August 16, 

2007.

SIP revision on August 16, 

2007.

67. Municipal solid waste landfill--A discrete area 

of land or an excavation that receives household 

waste and that is not a land application unit, 

surface impoundment, injection well, or waste 

pile, as those terms are defined under 40 Code of 

Federal Regulations §257.2. A municipal solid 

waste landfill (MSWLF) unit also may receive 

other types of Resource Conservation and 

Recovery Act Subtitle D wastes, such as 

commercial solid waste, nonhazardous sludge, 

conditionally exempt small-quantity generator 

waste, and industrial solid waste. Such a landfill 

may be publicly or privately owned. An 

MSWLF unit may be a new MSWLF unit, an 

existing MSWLF unit, or a lateral expansion.

Definition not revised in the June 10, 2005 

submittal.

65. Municipal solid 

waste landfill--A 

discrete area of land 

or an excavation that 

receives household 

waste and that is not 

a land application 

unit, surface 

impoundment, 

injection well, or 

waste pile, as those 

terms are defined 

under 40 Code of 

Federal Regulations 

§257.2. A municipal 

solid waste landfill 

(MSWLF) unit also 

may receive other 

types of Resource 

Conservation and 

Recovery Act 

Subtitle D wastes, 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

such as commercial 

solid waste, 

nonhazardous 

sludge, conditionally 

exempt smallquantity generator 

waste, and industrial 

solid waste. Such a 

landfill may be 

publicly or privately 

owned. An MSWLF 

unit may be a new 

MSWLF unit, an 

existing MSWLF 

unit, or a lateral 

expansion.

No change from SIPapproved version other 

than renumbering.

68. National ambient air quality standard--Those 

standards established under 42 United States 

Code, §7409, including standards for carbon 

monoxide, lead, nitrogen dioxide, ozone, 

inhalable particulate matter, and sulfur dioxide.

National ambient air quality standard--Those 

standards established under 42 United States Code, 

§7409 FCAA, §109, including standards for carbon 

monoxide, lead, nitrogen dioxide, ozone, inhalable 

particulate matter, and sulfur dioxide.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(64). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

66. National ambient 

air quality 

standard--Those 

standards 

established under 42 

United States Code, 

§7409, including 

standards for carbon 

monoxide, lead, 

nitrogen dioxide, 

ozone, inhalable 

particulate matter, 

and sulfur dioxide.

No change from SIPapproved version other 

than renumbering.

No change from the

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

69. Net ground-level concentration--The 

concentration of an air contaminant as measured 

at or beyond the property boundary minus the 

representative concentration flowing onto a 

property as measured at any point. Where there 

is no expected influence of the air contaminant 

flowing onto a property from other sources, the 

net ground level concentration may be 

Definition not revised in the June 10, 2005 

submittal.

67. Net ground-level 

concentration--The 

concentration of an 

air contaminant as 

measured at or 

beyond the property 

boundary minus the 

representative 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

determined by a measurement at or beyond the 

property boundary.

concentration 

flowing onto a 

property as 

measured at any 

point. Where there is 

no expected 

influence of the air 

contaminant flowing 

onto a property from 

other sources, the 

net ground level 

concentration may 

be determined by a 

measurement at or 

beyond the property 

boundary.

No change from SIPapproved version other 

than renumbering.

70. New source--Any stationary source, the 

construction or modification of which was 

commenced after March 5, 1972.

Definition not revised in the June 10, 2005 

submittal.

68. New source--Any 

stationary source, 

the construction or 

modification of 

which was 

commenced after 

March 5, 1972.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

71. TXd132 (70) Nonattainment area--A defined 

region within the state that is designated by the 

United States Environmental Protection Agency 

(EPA) as failing to meet the national ambient air 

quality standard (NAAQS or standard) for a 

pollutant for which a standard exists. The EPA 

will designate the area as nonattainment under 

the provisions of 42 United States Code, 

§7407(d). For the official list and boundaries of 

nonattainment areas, see 40 Code of Federal 

Regulations (CFR) Part 81 and pertinent Federal 

Register notices. The designations and 

classifications for the one-hour ozone national 

ambient air quality standard in 40 CFR Part 81 

Nonattainment area--A defined region within the 

state that is designated by the United States 

Environmental Protection Agency (EPA) as failing 

to meet the national ambient air quality standard 

(NAAQS or standard) for a pollutant for which a 

standard exists. The EPA will designate the area as 

nonattainment under the provisions of 42 United 

States Code, §7407(d). For the official list and 

boundaries of nonattainment areas, see 40 Code of 

Federal Regulations (CFR) Part 81 and pertinent 

Federal Register notices. The designations and 

classifications for the one-hour ozone national 

ambient air quality standard in 40 CFR Part 81 were 

retained for the purpose of anti-backsliding and 

69. Nitrogen oxides 

(NOX) – The sum of 

the nitric oxide and 

nitrogen dioxide in 

the flue gas or 

emission point, 

collectively 

expressed as 

nitrogen dioxide.

This revision is 

approvable. The new 

definition of “nitrogen 

oxides” is germane to the 

No change from the new 

definition submitted as a 

SIP revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

were retained for the purpose of anti-backsliding 

and upon determination by the EPA that any 

requirement is no longer required for purposes of 

anti-backsliding, then that requirement no longer 

applies.

upon determination by the EPA that any

requirement is no longer required for purposes of 

anti-backsliding, then that requirement no longer 

applies.

On December 28, 2011, EPA SIP-approved the

definition of “nonattainment area” as adopted by 

TCEQ February 9, 2011, effective March 3, 2011,

submitted to EPA March 11, 2011. 

See 76 FR 81371, effective January 27, 2012. 

EPA-R06-OAR-2008-0638. This approval action 

superceded the 2005 submittal to nonattainment 

area.

Texas air quality control 

rules and programs and 

should be included in the 

general definitions. This 

same definition is already 

SIP-approved at 30 TAC 

117.10.

72. Non-reportable emissions event--Any 

emissions event that in any 24-hour period does 

not result in an unauthorized emission from any 

emissions point equal to or in excess of the 

reportable quantity as defined in this section.

Definition not revised in the June 10, 2005 

submittal.

70. Nonattainment 

area--A defined 

region within the 

state that is 

designated by the 

United States 

Environmental 

Protection Agency 

(EPA) as failing to 

meet the national 

ambient air quality 

standard (NAAQS 

or standard) for a 

pollutant for which a 

standard exists. The 

EPA will designate 

the area as 

nonattainment under 

the provisions of 42 

United States Code, 

§7407(d). For the 

official list and 

boundaries of 

nonattainment areas, 

see 40 Code of 

Federal Regulations 

(CFR) Part 81 and 

pertinent Federal 

Register notices. 

The designations

and classifications 

for the one-hour 

70. Nonattainment 

area--A defined 

region within the 

state that is 

designated by the 

United States 

Environmental 

Protection Agency 

(EPA) as failing to 

meet the national 

ambient air quality 

standard (NAAQS or 

standard) for a 

pollutant for which a 

standard exists. The 

EPA will designate 

the area as 

nonattainment under 

the provisions of 42 

United States Code, 

§7407(d). For the 

official list and 

boundaries of 

nonattainment areas, 

see 40 Code of 

Federal Regulations 

(CFR) Part 81 and 

pertinent Federal 

Register notices. The 

designations and 

classifications for the 

one-hour ozone 

70. Nonattainment area-

-A defined region 

within the state that is 

designated by the 

United States 

Environmental 

Protection Agency 

(EPA) as failing to 

meet the national 

ambient air quality 

standard (NAAQS or 

standard) for a 

pollutant for which a 

standard exists. The 

EPA will designate 

the area as 

nonattainment under 

the provisions of 42 

United States Code, 

§7407(d). For the 

official list and 

boundaries of 

nonattainment areas, 

see 40 Code of 

Federal Regulations 

(CFR) Part 81 and 

pertinent Federal 

Register notices. The 

designations and 

classifications for the 

one-hour ozone 

national ambient air 
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

ozone national 

ambient air quality 

standard in 40 CFR 

Part 81 were 

retained for the 

purpose of antibacksliding and 

upon determination 

by the EPA that any 

requirement is no 

longer required for 

purposes of antibacksliding, then 

that requirement no 

longer applies.

On December 28, 2011, 

EPA SIP-approved the

definition of 

“nonattainment area” as 

adopted by TCEQ 

February 9, 2011, 

effective March 3, 2011,

submitted to EPA March 

11, 2011. 

See 76 FR 81371,

effective January 27, 

2012. 

EPA-R06-OAR-2008-

0638.

national ambient air 

quality standard in 

40 CFR Part 81 were 

retained for the 

purpose of antibacksliding and upon 

determination by the 

EPA that any 

requirement is no 

longer required for 

purposes of antibacksliding, then that 

requirement no 

longer applies.

On December 28, 2011, 

EPA SIP-approved the

definition of 

“nonattainment area” as 

adopted by TCEQ 

February 9, 2011, effective 

March 3, 2011, submitted 

to EPA March 11, 2011. 

See 76 FR 81371, effective 

January 27, 2012. 

EPA-R06-OAR-2008-

0638.

quality standard in 40 

CFR Part 81 were 

retained for the 

purpose of antibacksliding and upon 

determination by the 

EPA that any 

requirement is no 

longer required for 

purposes of antibacksliding, then that 

requirement no longer 

applies.

On December 28, 2011, 

EPA SIP-approved the

definition of 

“nonattainment area” as 

adopted by TCEQ 

February 9, 2011, effective 

March 3, 2011, submitted 

to EPA March 11, 2011. 

See 76 FR 81371, effective 

January 27, 2012. 

EPA-R06-OAR-2008-0638.

73. Opacity--The degree to which an emission of air 

contaminants obstructs the transmission of light 

expressed as the percentage of light obstructed 

as measured by an optical instrument or trained 

observer.

Definition not revised in the June 10, 2005 

submittal.

71. Non-reportable 

emissions event--

Any emissions event 

that in any 24-hour 

period does not 

result in an 

unauthorized 

emission from any 

emissions point 

equal to or in excess 

of the reportable 

quantity as defined 

in this section.

No change from SIPNo change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

approved version other 

than renumbering.

74. Open-top vapor degreasing--A batch solvent 

cleaning process that is open to the air and that 

uses boiling solvent to create solvent vapor used 

to clean or dry metal parts through condensation 

of the hot solvent vapors on the colder metal 

parts.

Open-top vapor degreasing--A batch solvent 

cleaning process that which is open to the air and 

that uses boiling solvent to create solvent vapor 

used to clean or dry metal parts through 

condensation of the hot solvent vapors on the colder 

metal parts.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(70). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

72. Opacity--The 

degree to which an 

emission of air 

contaminants 

obstructs the 

transmission of light 

expressed as the 

percentage of light 

obstructed as 

measured by an 

optical instrument or 

trained observer.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

75. Outdoor burning--Any fire or smokeproducing process that is not conducted in a 

combustion unit.

Outdoor burning--Any fire or smoke-producing 

process that which is not conducted in a 

combustion unit.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(71). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

73. Open-top vapor 

degreasing--A batch 

solvent cleaning 

process that is open 

to the air and that 

uses boiling solvent 

to create solvent 

vapor used to clean 

or dry metal parts 

through 

condensation of the 

hot solvent vapors 

on the colder metal 

parts.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

76. Particulate matter--Any material, except 

uncombined water, that exists as a solid or liquid 

in the atmosphere or in a gas stream at standard 

conditions.

Definition not revised in the June 10, 2005 

submittal.

74. Outdoor burning--

Any fire or smokeproducing process 

that is not conducted 

in a combustion 

unit.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

77. Particulate matter emissions--All finely

divided solid or liquid material, other than 

uncombined water, emitted to the ambient air as 

Particulate matter emissions—All finely divided 

finely-divided solid or liquid material, other than 

uncombined water, emitted to the ambient air as 

75. Particulate matter-

-Any material, 

except uncombined 

No change from the 

revised definition 

submitted as a SIP 

No change from the revised 

definition submitted as a 

SIP revision on August 16, 
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

measured by United States Environmental 

Protection Agency Reference Method 5, as 

specified at 40 Code of Federal Regulations 

(CFR) Part 60, Appendix A, modified to include 

particulate caught by an impinger train; by an 

equivalent or alternative method, as specified at 

40 CFR Part 51; or by a test method specified in 

an approved state implementation plan.

measured by United States Environmental 

Protection Agency EPA Reference Method 5, as 

specified at 40 Code of Federal Regulations (CFR) 

Part 60, Appendix A, modified to include 

particulate caught by an impinger train; by an 

equivalent or alternative method, as specified at 40 

CFR Part 51; or by a test method specified in an 

approved state implementation plan.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(73). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

water, that exists as 

a solid or liquid in 

the atmosphere or in 

a gas stream at 

standard conditions.

No change from SIPapproved version other 

than renumbering.

revision on August 16, 

2007.

2007.

78. Petroleum refinery--Any facility engaged in 

producing gasoline, kerosene, distillate fuel oils, 

residual fuel oils, lubricants, or other products 

through distillation of crude oil, or through the 

redistillation, cracking, extraction, reforming, or 

other processing of unfinished petroleum 

derivatives.

Definition not revised in the June 10, 2005 

submittal.

76. Particulate matter 

emissions--All 

finely divided solid 

or liquid material, 

other than 

uncombined water, 

emitted to the 

ambient air as 

measured by United 

States 

Environmental

Protection Agency 

Reference Method 5, 

as specified at 40 

Code of Federal 

Regulations (CFR) 

Part 60, Appendix 

A, modified to 

include particulate 

caught by an 

impinger train; by an 

equivalent or 

alternative method, 

as specified at 40 

CFR Part 51; or by a 

test method 

specified in an 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

approved state 

implementation 

plan.

No change from SIPapproved version other 

than renumbering.

79. PM10--Particulate matter with an aerodynamic 

diameter less than or equal to a nominal ten 

micrometers as measured by a reference method 

based on 40 Code of Federal Regulations (CFR) 

Part 50, Appendix J, and designated in 

accordance with 40 CFR Part 53, or by an 

equivalent method designated with that Part 53.

Definition not revised in the June 10, 2005 

submittal.

77. Petroleum 

refinery--Any 

facility engaged in 

producing gasoline, 

kerosene, distillate 

fuel oils, residual 

fuel oils, lubricants, 

or other products 

through distillation 

of crude oil, or 

through the 

redistillation, 

cracking, extraction, 

reforming, or other 

processing of 

unfinished 

petroleum 

derivatives.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

80. PM10 emissions--Finely-divided solid or liquid 

material with an aerodynamic diameter less than 

or equal to a nominal ten micrometers emitted to 

the ambient air as measured by an applicable 

reference method, or an equivalent or alternative 

method specified in 40 Code of Federal 

Regulations Part 51, or by a test method 

specified in an approved state implementation 

plan.

PM10 emissions—Finely divided Finely-divided

solid or liquid material with an aerodynamic 

diameter less than or equal to a nominal ten 

micrometers emitted to the ambient air as measured 

by an applicable reference method, or an equivalent 

or alternative method specified in 40 Code of 

Federal Regulations Part 51, or by a test method 

specified in an approved state implementation plan.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(76). EPA 

approved the renumbering in our previous SIP78. PM10 - Particulate 

matter with an 

aerodynamic 

diameter less than or 

equal to a nominal 

ten micrometers as 

measured by a 

reference method 

based on 40 Code of 

Federal Regulations 

(CFR) Part 50, 

Appendix J, and 

designated in 

accordance with 40 

CFR Part 53, or by 

an equivalent 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

actions but never addressed the non-substantive 

revisions.

method designated 

with that Part 53.

No change from SIPapproved version other 

than renumbering.

81. Polychlorinated biphenyl compound--A 

compound subject to 40 Code of Federal 

Regulations Part 761.

Definition not revised in the June 10, 2005 

submittal.

79. PM10 emissions--

Finely-divided solid 

or liquid material 

with an aerodynamic 

diameter less than or 

equal to a nominal 

ten micrometers 

emitted to the 

ambient air as 

measured by an 

applicable reference 

method, or an 

equivalent or 

alternative method 

specified in 40 Code 

of Federal 

Regulations Part 51, 

or by a test method 

specified in an 

approved state 

implementation 

plan.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

82. Process or processes--Any action, operation, or 

treatment embracing chemical, commercial, 

industrial, or manufacturing factors such as 

combustion units, kilns, stills, dryers, roasters, 

and equipment used in connection therewith, and 

all other methods or forms of manufacturing or 

processing that may emit smoke, particulate 

matter, gaseous matter, or visible emissions.

Definition not revised in the June 10, 2005 

submittal.

80. Polychlorinated 

biphenyl 

compound--A 

compound subject to 

40 Code of Federal 

Regulations Part 

761.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

83. Process weight per hour--"Process weight" is 

the total weight of all materials introduced or 

Process weight per hour--"Process weight" is the 

total weight of all materials introduced or 

81. Process or 

processes--Any 

No change from the 

revised definition 

No change from the revised 

definition submitted as a 
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

recirculated into any specific process that may 

cause any discharge of air contaminants into the 

atmosphere. Solid fuels charged into the process 

will be considered as part of the process weight, 

but liquid and gaseous fuels and combustion air 

will not. The "process weight per hour" will be 

derived by dividing the total process weight by 

the number of hours in one complete operation 

from the beginning of any given process to the 

completion thereof, excluding any time during 

that the equipment used to conduct the process is 

idle. For continuous operation, the "process 

weight per hour" will be derived by dividing the 

total process weight for a 24-hour period by 24.

recirculated into any specific process that which 

may cause any discharge of air contaminants into 

the atmosphere. Solid fuels charged into the process 

will be considered as part of the process weight, but 

liquid and gaseous fuels and combustion air will 

not. The "process weight per hour" will be derived 

by dividing the total process weight by the number 

of hours in one complete operation from the 

beginning of any given process to the completion 

thereof, excluding any time during that the 

equipment used to conduct the process is idle. For 

continuous operation, the "process weight per hour" 

will be derived by dividing the total process weight 

for a 24-hour period by 24.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(79). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

action, operation, or 

treatment embracing 

chemical, 

commercial, 

industrial, or 

manufacturing 

factors such as 

combustion units, 

kilns, stills, dryers, 

roasters, and 

equipment used in 

connection 

therewith, and all 

other methods or 

forms of 

manufacturing or 

processing that may 

emit smoke, 

particulate matter, 

gaseous matter, or 

visible emissions.

No change from SIPapproved version other 

than renumbering.

submitted as a SIP 

revision on August 16, 

2007.

SIP revision on August 16, 

2007.

84. Property--All land under common control or 

ownership coupled with all improvements on 

such land, and all fixed or movable objects on 

such land, or any vessel on the waters of this 

state.

Definition not revised in the June 10, 2005 

submittal.

82. Process weight per 

hour--"Process 

weight" is the total 

weight of all 

materials introduced 

or recirculated into 

any specific process 

that may cause any 

discharge of air 

contaminants into 

the atmosphere. 

Solid fuels charged 

into the process will 

be considered as part 

of the process 

weight, but liquid 

and gaseous fuels 

and combustion air 

will not. The 

"process weight per 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

hour" will be 

derived by dividing 

the total process 

weight by the 

number of hours in 

one complete 

operation from the 

beginning of any 

given process to the 

completion thereof, 

excluding any time 

during that the 

equipment used to 

conduct the process 

is idle. For 

continuous 

operation, the 

"process weight per 

hour" will be 

derived by dividing 

the total process 

weight for a 24-hour 

period by 24.

No change from SIPapproved version other

than renumbering.

85. Reasonable further progress--Annual 

incremental reductions in emissions of the 

applicable air contaminant that are sufficient to 

provide for attainment of the applicable national 

ambient air quality standard in the designated 

nonattainment areas by the date required in the 

state implementation plan.

Reasonable further progress--Annual incremental 

reductions in emissions of the applicable air 

contaminant that which are sufficient to provide 

for attainment of the applicable national ambient air 

quality standard in the designated nonattainment 

areas by the date required in the state 

implementation plan.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(81). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

83. Property--All land 

under common 

control or ownership 

coupled with all 

improvements on 

such land, and all 

fixed or movable 

objects on such land, 

or any vessel on the 

waters of this state.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16,

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

86. Regulated entity--All regulated units, facilities, Definition not revised in the June 10, 2005 84. Reasonable further No change from the No change from the revised 
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

equipment, structures, or sources at one street 

address or location that are owned or operated 

by the same person. The term includes any 

property under common ownership or control 

identified in a permit or used in conjunction with 

the regulated activity at the same street address 

or location. Owners or operators of pipelines, 

gathering lines, and flowlines under common 

ownership or control in a particular county may 

be treated as a single regulated entity for 

purposes of assessment and regulation of 

emissions events.

submittal. progress--Annual 

incremental 

reductions in 

emissions of the 

applicable air 

contaminant that are 

sufficient to provide 

for attainment of the 

applicable national 

ambient air quality 

standard in the 

designated 

nonattainment areas 

by the date required 

in the state 

implementation 

plan.

No change from SIPapproved version other 

than renumbering.

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

definition submitted as a 

SIP revision on August 16, 

2007.

87. Remote reservoir cold solvent cleaning--Any 

cold solvent cleaning operation in which liquid 

solvent is pumped to a sink-like work area that 

drains solvent back into an enclosed container 

while parts are being cleaned, allowing no 

solvent to pool in the work area.

Definition not revised in the June 10, 2005 

submittal.

85. Regulated entity--

All regulated units, 

facilities, equipment, 

structures, or 

sources at one street 

address or location 

that are owned or 

operated by the 

same person. The 

term includes any 

property under 

common ownership 

or control identified 

in a permit or used 

in conjunction with 

the regulated 

activity at the same 

street address or 

location. Owners or 

operators of 

pipelines, gathering 

lines, and flowlines 

under common 

ownership or control 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

in a particular 

county may be 

treated as a single 

regulated entity for 

purposes of 

assessment and 

regulation of 

emissions events.

No change from SIPapproved version other 

than renumbering.

88. Reportable emissions event--Any emissions 

event that in any 24-hour period, results in an 

unauthorized emission from any emissions point 

equal to or in excess of the reportable quantity as 

defined in this section.

Definition not revised in the June 10, 2005 

submittal.

86. Remote reservoir 

cold solvent 

cleaning--Any cold 

solvent cleaning 

operation in which 

liquid solvent is 

pumped to a sinklike work area that 

drains solvent back 

into an enclosed 

container while parts 

are being cleaned, 

allowing no solvent 

to pool in the work 

area.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

89. Reportable Quantity 

SEE THE FOLLOWING LINE IN THE CHART 

FOR THE CURRENT SIP-APPROVED 

DEFINITION.

Reportable Quantity 

On December 28, 2011, EPA SIP-approved the

definition of “reportable quantity” as adopted by 

TCEQ February 9, 2011, effective March 3, 2011,

submitted to EPA March 11, 2011. 

See 76 FR 81371, effective January 27, 2012. 

EPA-R06-OAR-2008-0638.This final rule approval 

superceded the 2005 submittal to “reportable 

quantity”. 

87. Reportable 

emissions event--

Any emissions event 

that in any 24-hour 

period, results in an 

unauthorized 

emission from any 

emissions point 

equal to or in excess 

of the reportable 

quantity as defined 

in this section.

No change from SIPNo change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

approved version other 

than renumbering.

90. Rubbish--Nonputrescible solid waste, consisting 

of both combustible and noncombustible waste 

materials. Combustible rubbish includes paper, 

rags, cartons, wood, excelsior, furniture, rubber, 

plastics, yard trimmings, leaves, and similar 

materials. Noncombustible rubbish includes 

glass, crockery, tin cans, aluminum cans, metal 

furniture, and like materials that will not bum at 

ordinary incinerator temperatures (1,600 degrees 

Fahrenheit to 1,800 degrees Fahrenheit).

Rubbish--Nonputrescible solid waste, consisting of 

both combustible and noncombustible waste 

materials. Combustible rubbish includes paper, 

rags, cartons, wood, excelsior, furniture, rubber, 

plastics, yard trimmings, leaves, and similar 

materials. Noncombustible rubbish includes glass, 

crockery, tin cans, aluminum cans, metal furniture, 

and like materials that which will not bum at 

ordinary incinerator temperatures (1,600 degrees 

Fahrenheit to 1,800 degrees Fahrenheit).

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(85). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

88. Reportable 

quantity (RQ)--Is 

as follows:

(A) for 

individual air 

contaminant 

compounds and 

specifically listed 

mixtures by name or 

Chemical Abstracts 

Service (CAS) 

number, either:

(i) the 

lowest of the 

quantities:

(I) listed 

in 40 Code of 

Federal Regulations 

(CFR) Part 302, 

Table 302.4, the 

column "final RQ”;

(II) listed 

in 40 CFR Part 355, 

Appendix A, the 

column "Reportable 

Quantity"; or

(III) listed 

as follows:

(-a-) 

acetaldehyde - 1,000 

pounds, except in 

the HoustonGalveston-Brazoria 

(HGB) and 

Beaumont-Port 

Arthur (BPA) ozone 

nonattainment areas 

as defined in 

paragraph (70) of 

this section, where 

the RQ must be 100 

pounds;

(-b-) 

88. Reportable 

quantity (RQ)--Is as 

follows:

(A) for 

individual air 

contaminant 

compounds and 

specifically listed 

mixtures by name or 

Chemical Abstracts 

Service (CAS) 

number, either:

(i) the lowest 

of the quantities:

(I) listed 

in 40 Code of 

Federal Regulations 

(CFR) Part 302, 

Table 302.4, the 

column "final RQ”;

(II) listed 

in 40 CFR Part 355, 

Appendix A, the 

column "Reportable 

Quantity"; or

(III) listed 

as follows:

(-a-) 

acetaldehyde - 1,000 

pounds, except in the 

Houston-GalvestonBrazoria (HGB) and 

Beaumont-Port 

Arthur (BPA) ozone 

nonattainment areas 

as defined in 

paragraph (70) of 

this section, where 

the RQ must be 100 

pounds;

(-b-) 

butanes (any isomer) 

- 5,000 pounds;

88. Reportable quantity 

(RQ)--Is as follows:

(A) for 

individual air 

contaminant 

compounds and 

specifically listed 

mixtures by name or 

Chemical Abstracts 

Service (CAS) 

number, either:

(i) the lowest 

of the quantities:

(I) listed in 

40 Code of Federal 

Regulations (CFR) 

Part 302, Table 302.4, 

the column "final 

RQ”;

(II) listed 

in 40 CFR Part 355, 

Appendix A, the 

column "Reportable 

Quantity"; or

(III) listed 

as follows:

(-a-) 

acetaldehyde - 1,000 

pounds, except in the 

Houston-GalvestonBrazoria (HGB) and 

Beaumont-Port 

Arthur (BPA) ozone 

nonattainment areas 

as defined in 

paragraph (70) of this 

section, where the RQ 

must be 100 pounds;

(-b-) 

butanes (any isomer) 

- 5,000 pounds;

(-c-) 

butenes (any isomer, 
30 TAC 101.1 

– Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

butanes (any isomer) - 5,000 pounds; (-c-) 

butenes (any isomer, 

except 1,3-

butadiene) - 5,000 

pounds, except in 

the HGB and BPA 

ozone nonattainment 

areas as defined in 

paragraph (70) of 

this section, where 

the RQ must be 100 

pounds;

(-d-) 

carbon monoxide -

5,000 pounds;(-

e-) 1-

chloro-1,1-

difluoroethane 

(HCFC-142b) -

5,000 pounds;(-

f-

) chlorodifluorometh

ane (HCFC-22) -

5,000 pounds;(-

g-)1-

chloro-1-

fluoroethane 

(HCFC-15la) - 5,000 

pounds;

(-h-) 

chlorofluoromethane 

(HCFC-31) - 5,000 

pounds;

(-i-) 

chloropentafluoroeth

ane (CFC-115) -

5,000 pounds;(-j

-) 2-

chloro-1,1,1,2-

tetrafluoroethane 

(HCFC-124) - 5,000 

pounds;

(-k-) 1-

(-c-) 

butenes (any isomer, 

except 1,3-

butadiene) - 5,000 

pounds, except in the 

HGB and BPA 

ozone nonattainment 

areas as defined in 

paragraph (70) of 

this section, where 

the RQ must be 100 

pounds;

(-d-) 

carbon monoxide -

5,000 pounds;(-

e-) 1-

chloro-1,1-

difluoroethane (HCFC-142b) 

-

5,000 pounds;(-

f-

) chlorodifluorometh

ane (HCFC-22) -

5,000 pounds;(-

g-)1-

chloro-1-

fluoroethane (HCFC-

15la) - 5,000 pounds; (-h-) 

chlorofluoromethane 

(HCFC-31) - 5,000 

pounds;

(-i-) 

chloropentafluoroeth

ane (CFC-115) -

5,000 pounds;(-j

-) 2-

chloro-1,1,1,2-

tetrafluoroethane 

(HCFC-124) - 5,000 

pounds;

(-k-) 1-

chloro-1,1,2,2 

tetrafluoroethane 

(HCFC-124a) -

except 1,3-butadiene) 

- 5,000 pounds, 

except in the HGB 

and BPA ozone 

nonattainment areas 

as defined in 

paragraph (70) of this 

section, where the RQ 

must be 100 pounds; (-d-) 

carbon monoxide -

5,000 pounds;(-

e-) 1-

chloro-1,1-

difluoroethane 

(HCFC-142b) - 5,000 

pounds;

(-f-

) chlorodifluorometha

ne (HCFC-22) - 5,000 

pounds;

(-g-)1-

chloro-1-fluoroethane 

(HCFC-15la) - 5,000 

pounds;

(-h-) 

chlorofluoromethane 

(HCFC-31) - 5,000 

pounds;

(-i-) 

chloropentafluoroetha

ne (CFC-115) - 5,000 

pounds;

(-j-) 2-

chloro-1,1,1,2-

tetrafluoroethane 

(HCFC-124) - 5,000 

pounds;

(-k-) 1-

chloro-1,1,2,2 

tetrafluoroethane 

(HCFC-124a) - 5,000 

pounds;

(-l-) 

1,1,1,2,3,4,4,5,5,5-
30 TAC 101.1 

– Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

chloro-1,1,2,2 

tetrafluoroethane 

(HCFC-124a) -

5,000 pounds;(-

l-) 

1,1,1,2,3,4,4,5,5,5-

decafluoropentane 

(HFC 43-10mee) -

5,000 pounds;(-

m-) 

decanes (any 

isomer) - 5,000 

pounds;

(-n-) 

1,1-dichloro-1-

fluoroethane(HCFC-

14lb) - 5,000 

pounds;

(-o-) 

3,3-dichloro-1,1,2,2-

pentafluoropropane 

(HCFC-225ca) -

5,000 pounds;(-

p-) 

1,3-dichloro-

1,1,2,2,3-

pentafluoropropane 

(HCFC-225cb) -

5,000 pounds;(-

q-) 

1,2-dichloro-1,1,2,2-

tetrafluoroethane(CF R-114) - 5,000 

pounds;

(-r-) 

1,1,-

dichlorotetrafluoroet

hane (CFC-114a) -

5,000 pounds;(-

s-) 

1,2-dichloro-l,1,2-

trifluoroethane 

(HCFC-123a) -

5,000 pounds;(-

t-) 1,l-

5,000 pounds;(-

l-) 

1,1,1,2,3,4,4,5,5,5-

decafluoropentane 

(HFC 43-10mee) -

5,000 pounds;(-

m-) 

decanes (any isomer) - 5,000 pounds; (-n-) 

1,1-dichloro-1-

fluoroethane(HCFC-

14lb) - 5,000 pounds; (-o-)

3,3-dichloro-1,1,2,2-

pentafluoropropane 

(HCFC-225ca) -

5,000 pounds;(-

p-) 

1,3-dichloro-

1,1,2,2,3-

pentafluoropropane 

(HCFC-225cb) -

5,000 pounds;(-

q-) 

1,2-dichloro-1,1,2,2-

tetrafluoroethane(CF R-114) - 5,000 

pounds;

(-r-) 

1,1,-

dichlorotetrafluoroet

hane (CFC-114a) -

5,000 pounds;(-

s-) 1,2-

dichloro-l,1,2-

trifluoroethane 

(HCFC-123a) -

5,000 pounds;(-

t-) 1,l-

difluoroethane 

(HFC-152a) - 5,000 

pounds;

(-u-) 

difluoromethane 

decafluoropentane 

(HFC 43-10mee) -

5,000 pounds;(-

m-) 

decanes (any isomer) - 5,000 pounds; (-n-) 1,1-

dichloro-1-

fluoroethane(HCFC-

14lb) - 5,000 pounds; (-o-) 3,3-

dichloro-1,1,2,2-

pentafluoropropane 

(HCFC-225ca) -

5,000 pounds;(-

p-) 1,3-

dichloro-1,1,2,2,3-

pentafluoropropane 

(HCFC-225cb) -

5,000 pounds;(-

q-) 1,2-

dichloro-1,1,2,2-

tetrafluoroethane(CF R-114) - 5,000 

pounds;

(-r-) 1,1,-

dichlorotetrafluoroeth

ane (CFC-114a) -

5,000 pounds;(-

s-) 1,2-

dichloro-l,1,2-

trifluoroethane 

(HCFC-123a) - 5,000 

pounds;

(-t-) 1,l-

difluoroethane (HFC-

152a) - 5,000 pounds; (-u-) 

difluoromethane 

(HFC-32) - 5,000 

pounds;

(-v-) 

ethanol - 5,000 

pounds;

(-w-) 
30 TAC 101.1 

– Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

difluoroethane 

(HFC-152a) - 5,000 

pounds;

(-u-) 

difluoromethane 

(HFC-32) - 5,000 

pounds;

(-v-) 

ethanol - 5,000 

pounds;

(-w-) 

ethylene - 5,000 

pounds, except in 

the HGB and BPA 

ozone nonattainment 

areas as defined in 

paragraph (70) of 

this section, where 

the RQ must be 100 

pounds;

(-x-) 

ethylfluoride (HFC-

161) - 5,000 pounds; (-y-) 

1,1,1,2,3,3,3-

heptafluoropropane(

HFC-227ea) - 5,000 

pounds;

(-z-) 

1,1,1,3,3,3-

hexafluoropropane 

(HFC-236fa) - 5,000 

pounds;

(-aa-) 

1,1,1,2,3,3-

hexafluoropropane 

(HFC-236ea) - 5,000 

pounds;

(-bb-) 

hexanes (any 

isomer) - 5,000 

pounds;

(-cc-) 

isopropyl alcohol -

5,000 pounds;

(HFC-32) - 5,000 

pounds;

(-v-) 

ethanol - 5,000 

pounds;

(-w-) 

ethylene - 5,000 

pounds, except in the 

HGB and BPA 

ozone nonattainment 

areas as defined in 

paragraph (70) of 

this section, where 

the RQ must be 100 

pounds;

(-x-) 

ethylfluoride (HFC-

161) - 5,000 pounds; (-y-) 

1,1,1,2,3,3,3-

heptafluoropropane(

HFC-227ea) - 5,000 

pounds;

(-z-) 

1,1,1,3,3,3-

hexafluoropropane 

(HFC-236fa) - 5,000 

pounds;

(-aa-) 

1,1,1,2,3,3-

hexafluoropropane 

(HFC-236ea) - 5,000 

pounds;

(-bb-) 

hexanes (any isomer) - 5,000 pounds; (-cc-) 

isopropyl alcohol -

5,000 pounds;(-dd

-) 

mineral spirits -

5,000 pounds;(-ee

-) 

octanes (any isomer) - 5,000 pounds;

ethylene - 5,000 

pounds, except in the 

HGB and BPA ozone 

nonattainment areas 

as defined in 

paragraph (70) of this 

section, where the RQ 

must be 100 pounds; (-x-) 

ethylfluoride (HFC-

161) - 5,000 pounds; (-y-) 

1,1,1,2,3,3,3-

heptafluoropropane(H

FC-227ea) - 5,000 

pounds;

(-z-) 

1,1,1,3,3,3-

hexafluoropropane 

(HFC-236fa) - 5,000 

pounds;

(-aa-) 

1,1,1,2,3,3-

hexafluoropropane 

(HFC-236ea) - 5,000 

pounds;

(-bb-) 

hexanes (any isomer) - 5,000 pounds; (-cc-) 

isopropyl alcohol -

5,000 pounds;(-dd

-) 

mineral spirits - 5,000 

pounds;

(-ee-) 

octanes (any isomer) -

5,000 pounds;(-ff-) 

oxides of nitrogen -

200 pounds in ozone 

nonattainment, ozone 

maintenance, early 

action compact areas, 

Nueces County, and 
30 TAC 101.1 

– Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

(-dd-) 

mineral spirits -

5,000 pounds;(-ee

-) 

octanes (any isomer) - 5,000 pounds; (-ff-) 

oxides of nitrogen -

200 pounds in ozone 

nonattainment, 

ozone maintenance, 

early action compact 

areas, Nueces 

County, and San 

Patricio County, and 

5,000 pounds in all 

other areas of the 

state, which should 

be used instead of 

the RQs for nitrogen 

oxide and nitrogen 

dioxide provided in 

40 CFR Part 302, 

Table 302.4, the 

column "final RQ"; (-gg-) 

pentachlorofluoroeth

ane (CFR-111) -

5,000 pounds;(-hh

-) 

1,1,1,3,3-

pentafluorobutane 

(HFC-365mfc) -

5,000 pounds;(-ii

-) 

pentafluoroethane 

(HFC-125) - 5,000 

pounds;

(-jj-) 

1,1,2,2,3-

pentafluoropropane 

(HFC-245ca) - 5,000 

pounds;

(-kk-) 

1,1,2,3,3-

(-ff-) 

oxides of nitrogen -

200 pounds in ozone 

nonattainment, ozone 

maintenance, early 

action compact 

areas, Nueces 

County, and San 

Patricio County, and 

5,000 pounds in all 

other areas of the 

state, which should 

be used instead of 

the RQs for nitrogen 

oxide and nitrogen 

dioxide provided in 

40 CFR Part 302, 

Table 302.4, the 

column "final RQ"; (-gg-) 

pentachlorofluoroeth

ane (CFR-111) -

5,000 pounds;(-hh

-) 

1,1,1,3,3-

pentafluorobutane 

(HFC-365mfc) -

5,000 pounds;(-ii

-) 

pentafluoroethane 

(HFC-125) - 5,000 

pounds;

(-jj-) 

1,1,2,2,3-

pentafluoropropane 

(HFC-245ca) - 5,000

pounds;

(-kk-) 

1,1,2,3,3-

pentafluoropropane 

(HFC-245ea) - 5,000 

pounds;

(-ll-) 

1,1,1,2,3-

pentafluoropropane 

San Patricio County, 

and 5,000 pounds in 

all other areas of the 

state, which should be 

used instead of the 

RQs for nitrogen 

oxide and nitrogen 

dioxide provided in 

40 CFR Part 302, 

Table 302.4, the 

column "final RQ"; (-gg-) 

pentachlorofluoroetha

ne (CFR-111) - 5,000 

pounds;

(-hh-) 

1,1,1,3,3-

pentafluorobutane 

(HFC-365mfc) -

5,000 pounds;(-ii

-) 

pentafluoroethane 

(HFC-125) - 5,000 

pounds;

(-jj-) 

1,1,2,2,3-

pentafluoropropane 

(HFC-245ca) - 5,000 

pounds;

(-kk-) 

1,1,2,3,3-

pentafluoropropane 

(HFC-245ea) - 5,000 

pounds;

(-ll-) 

1,1,1,2,3-

pentafluoropropane 

(HFC-245eb) - 5,000 

pounds;

(-mm-) 

1,1,1,3,3-

pentafluoropropane 

(HFC-245fa) - 5,000 

pounds;

(-nn-) 
30 TAC 101.1 

– Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

pentafluoropropane 

(HFC-245ea) - 5,000 

pounds;

(-ll-) 

1,1,1,2,3-

pentafluoropropane 

(HFC-245eb) -

5,000 pounds;(-mm

-) 

1,1,1,3,3-

pentafluoropropane 

(HFC-245fa) - 5,000 

pounds;

(-nn-) 

pentanes (any 

isomer) - 5,000 

pounds;

(-oo-) 

propane - 5,000 

pounds;

(-pp-) 

propylene - 5,000 

pounds, except in 

the HGB and BPA 

ozone nonattainment 

areas as defined in 

paragraph (70) of 

this section, where 

the RQ must be 100 

pounds;

(-qq-) 

1,1,2,2-

terachlorodifluoroet

hane (CFR-112) -

5,000 pounds;(-rr

-) 

1,1,1,2-

tetrachlorodifluoroet

hane (CFC-112a) -

5,000 pounds;(-ss

-) 

1,1,2,2-

tetrafluoroethane 

(HFC-134) - 5,000 

pounds;

(HFC-245eb) - 5,000 

pounds;

(-mm-) 

1,1,1,3,3-

pentafluoropropane 

(HFC-245fa) - 5,000 

pounds;

(-nn-) 

pentanes (any 

isomer) - 5,000 

pounds;

(-oo-) 

propane - 5,000 

pounds;

(-pp-) 

propylene - 5,000 

pounds, except in the 

HGB and BPA 

ozone nonattainment 

areas as defined in 

paragraph (70) of 

this section, where 

the RQ must be 100 

pounds;

(-qq-) 

1,1,2,2-

terachlorodifluoroeth

ane (CFR-112) -

5,000 pounds;(-rr

-) 

1,1,1,2-

tetrachlorodifluoroet

hane (CFC-112a) -

5,000 pounds;(-ss

-) 

1,1,2,2-

tetrafluoroethane 

(HFC-134) - 5,000 

pounds;

(-tt-) 

1,1,1,2-

tetrafluoroethane 

(HFC-134a) - 5,000 

pounds;

(-uu-) 

pentanes (any isomer) - 5,000 pounds; (-oo-) 

propane - 5,000 

pounds;

(-pp-) 

propylene - 5,000 

pounds, except in the 

HGB and BPA ozone 

nonattainment areas 

as defined in 

paragraph (70) of this 

section, where the RQ 

must be 100 pounds; (-qq-) 

1,1,2,2-

terachlorodifluoroeth

ane (CFR-112) -

5,000 pounds;(-rr

-) 

1,1,1,2-

tetrachlorodifluoroeth

ane (CFC-112a) -

5,000 pounds;(-ss

-) 

1,1,2,2-

tetrafluoroethane 

(HFC-134) - 5,000 

pounds;

(-tt-) 

1,1,1,2-

tetrafluoroethane 

(HFC-134a) - 5,000 

pounds;

(-uu-) 

1,1,2-trichloro-1,2,2-

trifluoroethane (CFR-

113) - 5,000 pounds; (-vv-) 

1,1,1-trichloro-2,2,2-

trifluoroethane (CFC-

113a) - 5,000 pounds; (-ww-) 

1,1,1-trifluoro-2,2-

dichloroethane 
30 TAC 101.1 

– Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

(-tt-) 

1,1,1,2-

tetrafluoroethane 

(HFC-134a) - 5,000 

pounds;

(-uu-) 

1,1,2-trichloro-

1,2,2-trifluoroethane 

(CFR-113) - 5,000 

pounds;

(-vv-) 

1,1,1-trichloro-

2,2,2-trifluoroethane 

(CFC-113a) - 5,000 

pounds;

(-ww-) 

1,1,1-trifluoro-2,2-

dichloroethane 

(HCFC-123) - 5,000 

pounds;

(-xx-) 

1,1,1-trifluoroethane 

(HFC-143a) - 5,000 

pounds;

(-yy-) 

trifluoromethane 

(HFC-23) - 5,000 

pounds; or

(-zz-) 

toluene - 1,000 

pounds, except in 

the HGB and BPA 

ozone nonattainment 

areas as defined in 

paragraph (70) of 

this section, where 

the RQ must be 100 

pounds;

(ii) if not 

listed in clause (i) of 

this subparagraph, 

100 pounds;

(B) for 

mixtures of air 

contaminant 

1,1,2-trichloro-1,2,2-

trifluoroethane 

(CFR-113) - 5,000 

pounds;

(-vv-) 

1,1,1-trichloro-2,2,2-

trifluoroethane 

(CFC-113a) - 5,000 

pounds;

(-ww-) 

1,1,1-trifluoro-2,2-

dichloroethane 

(HCFC-123) - 5,000 

pounds;

(-xx-) 

1,1,1-trifluoroethane 

(HFC-143a) - 5,000 

pounds;

(-yy-) 

trifluoromethane 

(HFC-23) - 5,000 

pounds; or

(-zz-) 

toluene - 1,000 

pounds, except in the 

HGB and BPA 

ozone nonattainment 

areas as defined in 

paragraph (70) of 

this section, where 

the RQ must be 100 

pounds;

(ii) if not 

listed in clause (i) of 

this subparagraph, 

100 pounds;

(B) for 

mixtures of air 

contaminant 

compounds:

(i) where the 

relative amount of 

individual air 

contaminant 

compounds is known 

(HCFC-123) - 5,000 

pounds;

(-xx-) 

1,1,1-trifluoroethane 

(HFC-143a) - 5,000 

pounds;

(-yy-) 

trifluoromethane 

(HFC-23) - 5,000 

pounds; or

(-zz-) 

toluene - 1,000 

pounds, except in the 

HGB and BPA ozone 

nonattainment areas 

as defined in 

paragraph (70) of this 

section, where the RQ 

must be 100 pounds;

(ii) if not 

listed in clause (i) of 

this subparagraph, 

100 pounds;

(B) for mixtures 

of air contaminant 

compounds:

(i) where the 

relative amount of 

individual air 

contaminant 

compounds is known 

through common 

process knowledge or 

prior engineering 

analysis or testing, 

any amount of an 

individual air 

contaminant 

compound that equals 

or exceeds the 

amount specified in 

subparagraph (A) of 

this paragraph;

(ii) where the 

relative amount of 
30 TAC 101.1 

– Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

compounds:

(i) where the 

relative amount of 

individual air 

contaminant 

compounds is 

known through 

common process 

knowledge or prior 

engineering analysis 

or testing, any 

amount of an 

individual air 

contaminant 

compound that 

equals or exceeds 

the amount specified 

in subparagraph (A) 

of this paragraph;

(ii) where 

the relative amount 

of individual air 

contaminant 

compounds in 

subparagraph (A)(i) 

of this paragraph is 

not known, any 

amount of the 

mixture that equals 

or exceeds the 

amount for any 

single air 

contaminant 

compound that is 

present in the 

mixture and listed in 

subparagraph (A)(i) 

of this paragraph;

(iii) where 

each of the 

individual air 

contaminant 

compounds listed in 

subparagraph (A)(i) 

of this paragraph are 

through common 

process knowledge 

or prior engineering 

analysis or testing, 

any amount of an 

individual air 

contaminant 

compound that 

equals or exceeds the 

amount specified in 

subparagraph (A) of 

this paragraph;

(ii) where 

the relative amount 

of individual air 

contaminant 

compounds in 

subparagraph (A)(i) 

of this paragraph is 

not known, any 

amount of the 

mixture that equals 

or exceeds the 

amount for any 

single air 

contaminant 

compound that is 

present in the 

mixture and listed in 

subparagraph (A)(i) 

of this paragraph;

(iii) where 

each of the 

individual air 

contaminant 

compounds listed in 

subparagraph (A)(i) 

of this paragraph are 

known to be less 

than 0.02% by 

weight of the 

mixture, and each of 

the other individual 

air contaminant 

compounds covered 

individual air 

contaminant 

compounds in 

subparagraph (A)(i) 

of this paragraph is 

not known, any 

amount of the mixture 

that equals or exceeds 

the amount for any 

single air contaminant 

compound that is 

present in the mixture 

and listed in 

subparagraph (A)(i) 

of this paragraph;

(iii) where 

each of the individual 

air contaminant 

compounds listed in 

subparagraph (A)(i) 

of this paragraph are 

known to be less than 

0.02% by weight of

the mixture, and each 

of the other individual 

air contaminant 

compounds covered 

by subparagraph 

(A)(ii) of this 

paragraph are known 

to be less than 2.0% 

by weight of the 

mixture, any total 

amount of the mixture 

of air contaminant 

compounds greater 

than or equal to 5,000 

pounds; or

(iv) where 

natural gas excluding 

carbon dioxide, 

water, nitrogen, 

methane, ethane, 

noble gases, 

hydrogen, and oxygen 
30 TAC 101.1 

– Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

known to be less 

than 0.02% by 

weight of the 

mixture, and each of 

the other individual 

air contaminant 

compounds covered 

by subparagraph 

(A)(ii) of this 

paragraph are 

known to be less 

than 2.0% by weight 

of the mixture, any 

total amount of the 

mixture of air 

contaminant 

compounds greater 

than or equal to 

5,000 pounds; or

(iv) where 

natural gas 

excluding carbon 

dioxide, water, 

nitrogen, methane, 

ethane, noble gases, 

hydrogen, and 

oxygen or air 

emissions from 

crude oil are known 

to be in an amount 

greater than or equal 

to 5,000 pounds or 

the associated 

hydrogen sulfide 

and mercaptans in a 

total amount greater 

than 100 pounds, 

whichever occurs 

first;

(C) for opacity 

from boilers and 

combustion turbines 

as defined in this 

section fueled by 

natural gas, coal, 

by subparagraph 

(A)(ii) of this 

paragraph are known 

to be less than 2.0% 

by weight of the 

mixture, any total 

amount of the 

mixture of air 

contaminant 

compounds greater 

than or equal to 

5,000 pounds; or

(iv) where 

natural gas excluding 

carbon dioxide, 

water, nitrogen, 

methane, ethane, 

noble gases, 

hydrogen, and 

oxygen or air 

emissions from crude 

oil are known to be 

in an amount greater 

than or equal to 

5,000 pounds or the 

associated hydrogen 

sulfide and 

mercaptans in a total 

amount greater than 

100 pounds, 

whichever occurs 

first;

(C) for opacity 

from boilers and 

combustion turbines 

as defined in this 

section fueled by 

natural gas, coal, 

lignite, wood, fuel 

oil containing 

hazardous air 

pollutants at a 

concentration of less 

than 0.02% by 

weight, opacity that 

or air emissions from 

crude oil are known 

to be in an amount 

greater than or equal 

to 5,000 pounds or 

the associated 

hydrogen sulfide and 

mercaptans in a total 

amount greater than 

100 pounds, 

whichever occurs 

first;

(C) for opacity 

from boilers and 

combustion turbines 

as defined in this 

section fueled by 

natural gas, coal, 

lignite, wood, fuel oil 

containing hazardous 

air pollutants at a 

concentration of less 

than 0.02% by 

weight, opacity that is 

equal to or exceeds 

15 additional 

percentage points 

above the applicable 

limit, averaged over a 

six-minute period. 

Opacity is the only 

RQ applicable to 

boilers and 

combustion turbines 

described in this 

paragraph; or

(D) for facilities 

where air 

contaminant 

compounds are 

measured directly by 

a continuous emission 

monitoring system 

providing updated 

readings at a 
30 TAC 101.1 

– Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

lignite, wood, fuel 

oil containing 

hazardous air 

pollutants at a 

concentration of less 

than 0.02% by 

weight, opacity that 

is equal to or 

exceeds 15 

additional 

percentage points 

above the applicable 

limit, averaged over 

a six-minute period. 

Opacity is the only 

RQ applicable to 

boilers and 

combustion turbines 

described in this 

paragraph; or

(D) for 

facilities where air 

contaminant 

compounds are 

measured directly by 

a continuous 

emission monitoring 

system providing 

updated readings at 

a minimum 15-

minute interval an 

amount, approved 

by the executive 

director based on 

any relevant 

conditions and a 

screening model, 

that would be 

reported prior to 

ground level 

concentrations 

reaching at any 

distance beyond the 

closest regulated 

entity property line:

is equal to or exceeds 

15 additional 

percentage points 

above the applicable 

limit, averaged over 

a six-minute period. 

Opacity is the only 

RQ applicable to 

boilers and 

combustion turbines 

described in this 

paragraph; or

(D) for 

facilities where air 

contaminant 

compounds are 

measured directly by 

a continuous 

emission monitoring 

system providing 

updated readings at a 

minimum 15-minute 

interval an amount, 

approved by the 

executive director 

based on any 

relevant conditions 

and a screening 

model, that would be 

reported prior to 

ground level 

concentrations 

reaching at any 

distance beyond the 

closest regulated 

entity property line:

(i) less than 

one-half of any 

applicable ambient 

air standards; and

(ii) less than 

two times the 

concentration of 

applicable air 

emission limitations.

minimum 15-minute 

interval an amount, 

approved by the 

executive director 

based on any relevant 

conditions and a 

screening model, that 

would be reported 

prior to ground level 

concentrations 

reaching at any 

distance beyond the 

closest regulated 

entity property line:

(i) less than

one-half of any 

applicable ambient air 

standards; and

(ii) less than 

two times the 

concentration of 

applicable air 

emission limitations.

On December 28, 2011, 

EPA SIP-approved the

definition of “reportable 

quantity” as adopted by 

TCEQ February 9, 2011, 

effective March 3, 2011,

submitted to EPA March 

11, 2011. 

See 76 FR 81371, effective 

January 27, 2012. 

EPA-R06-OAR-2008-0638.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

(i) less than 

one-half of any 

applicable ambient 

air standards; and

(ii) less than 

two times the 

concentration of 

applicable air 

emission limitations.

On December 28, 2011, 

EPA SIP-approved the

definition of “reportable 

quantity” as adopted by 

TCEQ February 9, 2011, 

effective March 3, 2011,

submitted to EPA March 

11, 2011. 

See 76 FR 81371,

effective January 27, 

2012. 

EPA-R06-OAR-2008-

0638.

On December 28, 2011, 

EPA SIP-approved the

definition of “reportable 

quantity” as adopted by 

TCEQ February 9, 2011, 

effective March 3, 2011,

submitted to EPA March 

11, 2011. 

See 76 FR 81371, effective 

January 27, 2012. 

EPA-R06-OAR-2008-

0638.

91. Scheduled maintenance, startup, or shutdown 

activity--For activities with unauthorized 

emissions that are expected to exceed a 

reportable quantity (RQ), a scheduled 

maintenance, startup, or shutdown activity is an 

activity that the owner or operator of the 

regulated entity whether performing or otherwise 

affected by the activity, provides prior notice 

and a final report as required by §101.211 of this 

title (relating to Scheduled Maintenance, Startup, 

and Shutdown Reporting and Recordkeeping 

Requirements); the notice or final report 

includes the information required in §101.211 of 

this title; and the actual unauthorized emissions 

from the activity do not exceed the emissions 

estimates submitted in the initial notification by 

more than an RQ. For activities with 

unauthorized emissions that are not expected to,

and do not, exceed an RQ, a scheduled 

maintenance, startup, or shutdown activity is one 

that is recorded as required by §101.211 of this 

title. Expected excess opacity events as 

Scheduled maintenance, startup, or shutdown 

activity--For activities with unauthorized emissions 

that which are expected to exceed a reportable 

quantity (RQ), a scheduled maintenance, startup, or 

shutdown activity is an activity that the owner or 

operator of the regulated entity whether performing 

or otherwise affected by the activity, provides prior 

notice and a final report as required by §101.211 of 

this title (relating to Scheduled Maintenance, 

Startup, and Shutdown Reporting and 

Recordkeeping Requirements); the notice or final 

report includes the information required in 

§101.211 of this title; and the actual unauthorized 

emissions from the activity do not exceed the 

emissions estimates submitted in the initial 

notification by more than an RQ. For activities with 

unauthorized emissions that which are not expected 

to, and do not, exceed an RQ, a scheduled 

maintenance, startup, or shutdown activity is one 

that is recorded as required by §101.211 of this title. 

Expected excess opacity events as described in 

§101.201(e) of this title (relating to Emissions 

89. Rubbish--

Nonputrescible solid 

waste, consisting of 

both combustible 

and noncombustible 

waste materials. 

Combustible rubbish 

includes paper, rags, 

cartons, wood, 

excelsior, furniture, 

rubber, plastics, yard 

trimmings, leaves, 

and similar 

materials. 

Noncombustible 

rubbish includes 

glass, crockery, tin 

cans, aluminum 

cans, metal 

furniture, and like 

materials that will 

not bum at ordinary 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

described in §101.201(e) of this title (relating to 

Emissions Event Reporting and Recordkeeping 

Requirements) resulting from scheduled 

maintenance, startup, or shutdown activities are 

those that provide prior notice (if required), and 

are recorded and reported as required by 

§101.211 of this title.

Event Reporting and Recordkeeping Requirements) 

resulting from scheduled maintenance, startup, or 

shutdown activities are those that provide prior 

notice (if required), and are recorded and reported 

as required by §101.211 of this title.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(86). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

incinerator 

temperatures (1,600 

degrees Fahrenheit 

to 1,800 degrees 

Fahrenheit).

No change from SIPapproved version other 

than renumbering.

92. Sludge--Any solid or semi-solid, or liquid waste 

generated from a municipal, commercial, or 

industrial wastewater treatment plant; water 

supply treatment plant, exclusive of the treated 

effluent from a wastewater treatment plant; or air 

pollution control equipment.

Definition not revised in the June 10, 2005 

submittal.

90. Scheduled 

maintenance, 

startup, or 

shutdown activity--

For activities with 

unauthorized 

emissions that are 

expected to exceed a 

reportable quantity 

(RQ), a scheduled 

maintenance, 

startup, or shutdown 

activity is an activity 

that the owner or 

operator of the 

regulated entity 

whether performing 

or otherwise 

affected by the 

activity, provides 

prior notice and a 

final report as 

required by 

§101.211 of this title 

(relating to 

Scheduled 

Maintenance, 

Startup, and 

Shutdown Reporting 

and Recordkeeping 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 

– Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

Requirements); the 

notice or final report 

includes the 

information required 

in §101.211 of this 

title; and the actual 

unauthorized 

emissions from the 

activity do not 

exceed the 

emissions estimates 

submitted in the 

initial notification 

by more than an RQ. 

For activities with 

unauthorized 

emissions that are 

not expected to, and 

do not, exceed an 

RQ, a scheduled 

maintenance, 

startup, or shutdown 

activity is one that is 

recorded as required 

by §101.211 of this title. Expected 

excess opacity 

events as described 

in §101.201(e) of 

this title (relating to 

Emissions Event 

Reporting and 

Recordkeeping 

Requirements) 

resulting from 

scheduled 

maintenance, 

startup, or shutdown 

activities are those 

that provide prior 

notice (if required), 

and are recorded and 

reported as required 

by §101.211 of this 

title.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

No change from SIPapproved version other 

than renumbering.

93. Smoke--Small gas-born particles resulting from 

incomplete combustion consisting predominately 

of carbon and other combustible material and 

present in sufficient quantity to be visible.

Definition not revised in the June 10, 2005 

submittal.

91. Sludge--Any solid 

or semi-solid, or 

liquid waste 

generated from a 

municipal, 

commercial, or 

industrial 

wastewater 

treatment plant; 

water supply 

treatment plant, 

exclusive of the 

treated effluent from 

a wastewater 

treatment plant; or 

air pollution control 

equipment.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

94. Solid waste--Garbage, rubbish, refuse, sludge 

from a waste water treatment plant, water supply 

treatment plant, or air pollution control 

equipment, and other discarded material, 

including solid, liquid, semisolid, or 

containerized gaseous material resulting from 

industrial, municipal, commercial, mining, and 

agricultural operations and from community and 

institutional activities. The term does not 

include:

(A) solid or dissolved material in domestic 

sewage, or solid or dissolved material in 

irrigation return flows, or industrial discharges 

subject to regulation by permit issued under the 

Texas Water Code, Chapter 26;

(B) soil, dirt, rock, sand, and other natural 

or man-made inert solid materials used to fill 

land, if the object of the fill is to make the land 

suitable for the construction of surface 

improvements; or

Definition not revised in the June 10, 2005 

submittal.

92. Smoke--Small gasborn particles 

resulting from 

incomplete 

combustion 

consisting 

predominately of 

carbon and other 

combustible material 

and present in 

sufficient quantity to 

be visible.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

(C) waste materials that result from 

activities associated with the exploration, 

development, or production of oil or gas, or 

geothermal resources, and other substance or 

material regulated by the Railroad Commission 

of Texas under Natural Resources Code, 

§91.101, unless the waste, substance, or material 

results from activities associated with gasoline 

plants, natural gas liquids processing plants, 

pressure maintenance plants, or repressurizing 

plants and is hazardous waste as defined by the 

administrator of the United States Environmental 

Protection Agency under the federal Solid Waste 

Disposal Act, as amended by Resource 

Conservation and Recovery Act, as amended (42 

United States Code, §§6901 et seq.).

95. Sour crude--A crude oil that will emit a sour 

gas when in equilibrium at atmospheric pressure.

Sour crude--A crude oil that which will emit a 

sour gas when in equilibrium at atmospheric 

pressure.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(91). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

93. Solid waste--

Garbage, rubbish, 

refuse, sludge from 

a waste water 

treatment plant, 

water supply 

treatment plant, or 

air pollution control 

equipment, and 

other discarded 

material, including 

solid, liquid, 

semisolid, or 

containerized 

gaseous material 

resulting from 

industrial, 

municipal, 

commercial, mining, 

and agricultural 

operations and from 

community and 

institutional 

activities. The term 

does not include:

(A) solid or 

dissolved material in 

domestic sewage, or 

solid or dissolved 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 

– Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

material in irrigation 

return flows, or 

industrial discharges 

subject to regulation 

by permit issued 

under the Texas 

Water Code, 

Chapter 26;

(B) soil, dirt, 

rock, sand, and other 

natural or man-made 

inert solid materials 

used to fill land, if 

the object of the fill 

is to make the land 

suitable for the 

construction of 

surface 

improvements; or

(C) waste 

materials that result 

from activities 

associated with the 

exploration, 

development, or 

production of oil or 

gas, or geothermal 

resources, and other 

substance or 

material regulated 

by the Railroad 

Commission of 

Texas under Natural 

Resources Code, 

§91.101, unless the 

waste, substance, or 

material results from 

activities associated 

with gasoline plants, 

natural gas liquids 

processing plants, 

pressure 

maintenance plants, 

or repressurizing 

plants and is 
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

hazardous waste as 

defined by the 

administrator of the 

United States 

Environmental 

Protection Agency 

under the federal 

Solid Waste 

Disposal Act, as 

amended by 

Resource 

Conservation and 

Recovery Act, as 

amended (42 United 

States Code, §§6901 

et seq.).

No change from SIPapproved version other 

than renumbering.

96. Sour gas--Any natural gas containing more than 

1.5 grains of hydrogen sulfide per 100 cubic 

feet, or more than 30 grains of total sulfur per 

100 cubic feet.

Definition not revised in the June 10, 2005 

submittal.

94. Sour crude--A 

crude oil that will 

emit a sour gas 

when in equilibrium 

at atmospheric 

pressure.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

97. Source--A point of origin of air contaminants, 

whether privately or publicly owned or operated. 

Upon request of a source owner, the executive 

director shall determine whether multiple 

processes emitting air contaminants from a 

single point of emission will be treated as a 

single source or as multiple sources.

Definition not revised in the June 10, 2005 

submittal.

95. Sour gas--Any 

natural gas 

containing more 

than 1.5 grains of 

hydrogen sulfide per 

100 cubic feet, or 

more than 30 grains 

of total sulfur per 

100 cubic feet.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

98. Special waste from health care-related 

facilities--A solid waste that if improperly 

Special waste from health care-related care 

related facilities--A solid waste that which if 

96. Source--A point of 

origin of air 

No change from the 

revised definition 

No change from the revised 

definition submitted as a 
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

treated or handled, may serve to transmit 

infectious disease(s) and that is comprised of the 

following: animal waste, bulk blood and blood 

products, microbiological waste, pathological 

waste, and sharps.

improperly treated or handled, may serve to 

transmit infectious disease(s) and that is comprised 

of the following: animal waste, bulk blood and 

blood products, microbiological waste, pathological 

waste, and sharps.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(94). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

contaminants, 

whether privately or 

publicly owned or 

operated. Upon 

request of a source 

owner, the executive 

director shall 

determine whether 

multiple processes 

emitting air 

contaminants from a 

single point of 

emission will be 

treated as a single 

source or as multiple 

sources.

No change from SIPapproved version other 

than renumbering.

submitted as a SIP 

revision on August 16, 

2007.

SIP revision on August 16, 

2007.

99. Standard conditions--A condition at a 

temperature of 68 degrees Fahrenheit (20 

degrees Centigrade) and a pressure of 14.7 

pounds per square inch absolute (101.3 

kiloPascals). Pollutant concentrations from an 

incinerator will be corrected to a condition of 

50% excess air if the incinerator is operating at 

greater than 50% excess air.

Definition not revised in the June 10, 2005 

submittal.

97. Special waste from 

health care-related 

facilities--A solid 

waste that if 

improperly treated 

or handled, may 

serve to transmit 

infectious disease(s) 

and that is 

comprised of the 

following: animal 

waste, bulk blood 

and blood products, 

microbiological 

waste, pathological 

waste, and sharps.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

100. Standard metropolitan statistical area--An 

area consisting of a county or one or more 

contiguous counties that is officially so 

designated by the United States Bureau of the 

Budget.

Standard metropolitan statistical area--An area 

consisting of a county or one or more contiguous 

counties that which is officially so designated by 

the United States Bureau of the Budget.

98. Standard 

conditions--A 

condition at a 

temperature of 68 

degrees Fahrenheit 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(96). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

(20 degrees 

Centigrade) and a 

pressure of 14.7 

pounds per square 

inch absolute (101.3 

kiloPascals). 

Pollutant 

concentrations from 

an incinerator will 

be corrected to a 

condition of 50% 

excess air if the 

incinerator is 

operating at greater 

than 50% excess air.

This revision is 

approvable. The removal 

of the last sentence 

removes variability in the 

definition and amends the 

definition of “standard 

conditions” to be truly 

standard.

101. Submerged fill pipe--A fill pipe that extends 

from the top of a tank to have a maximum 

clearance of six inches (15.2 centimeters) from 

the bottom or, when applied to a tank that is 

loaded from the side, that has a discharge 

opening entirely submerged when the pipe used 

to withdraw liquid from the tank can no longer 

withdraw liquid in normal operation.

Submerged fill pipe--A fill pipe that extends from 

the top of a tank to have a maximum clearance of 

six inches (15.2 centimeters) from the bottom or, 

when applied to a tank that which is loaded from 

the side, that has a discharge opening entirely 

submerged when the pipe used to withdraw liquid 

from the tank can no longer withdraw liquid in 

normal operation.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(97). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

99. Standard 

metropolitan 

statistical area--An 

area consisting of a 

county or one or 

more contiguous 

counties that is 

officially so 

designated by the 

United States 

Bureau of the 

Budget.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

102. Sulfur compounds--All inorganic or organic 

chemicals having an atom or atoms of sulfur in 

their chemical structure.

Definition not revised in the June 10, 2005 

submittal.

100. Submerged fill 

pipe--A fill pipe that 

extends from the top 

No change from the 

revised definition 

submitted as a SIP 

No change from the revised 

definition submitted as a 

SIP revision on August 16, 
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

of a tank to have a 

maximum clearance 

of six inches (15.2 

centimeters) from 

the bottom or, when 

applied to a tank that 

is loaded from the 

side, that has a 

discharge opening 

entirely submerged 

when the pipe used 

to withdraw liquid 

from the tank can no 

longer withdraw 

liquid in normal 

operation.

No change from SIPapproved version other 

than renumbering.

revision on August 16, 

2007.

2007.

103. Sulfuric acid mist/sulfuric acid--Emissions of 

sulfuric acid mist and sulfuric acid are 

considered to be the same air contaminant 

calculated as H2S04 and must include sulfuric 

acid liquid mist, sulfur trioxide, and sulfuric acid 

vapor as measured by Test Method 8 in 40 Code 

of Federal Regulations Part 60, Appendix A.

Definition not revised in the June 10, 2005 

submittal.

101. Sulfur compounds-

-All inorganic or 

organic chemicals 

having an atom or 

atoms of sulfur in 

their chemical 

structure.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16,

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

104. Sweet crude oil and gas--Those crude 

petroleum hydrocarbons that are not "sour" as 

defined in this section.

Definition not revised in the June 10, 2005 

submittal.

102. Sulfuric acid 

mist/sulfuric acid--

Emissions of 

sulfuric acid mist 

and sulfuric acid are 

considered to be the 

same air 

contaminant 

calculated as H2S04 

and must include 

sulfuric acid liquid 

mist, sulfur trioxide, 

and sulfuric acid 

vapor as measured 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

by Test Method 8 in 

40 Code of Federal 

Regulations Part 60, 

Appendix A.

No change from SIPapproved version other 

than renumbering.

105. Total suspended particulate--Particulate matter 

as measured by the method described in 40 Code 

of Federal Regulations Part 50, Appendix B.

Definition not revised in the June 10, 2005 

submittal.

103. Sweet crude oil and 

gas--Those crude 

petroleum 

hydrocarbons that 

are not "sour" as 

defined in this 

section.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

106. Transfer efficiency--The amount of coating 

solids deposited onto the surface or a part of 

product divided by the total amount of coating 

solids delivered to the coating application 

system.

Definition not revised in the June 10, 2005 

submittal.

104. Total suspended 

particulate--

Particulate matter as 

measured by the 

method described in 

40 Code of Federal 

Regulations Part 50, 

Appendix B.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

107. True vapor pressure--The absolute aggregate 

partial vapor pressure, measured in pounds per 

square inch absolute, of all volatile organic 

compounds at the temperature of storage, 

handling, or processing.

Definition not revised in the June 10, 2005 

submittal.

105. Transfer efficiency-

-The amount of 

coating solids 

deposited onto the

surface or a part of 

product divided by 

the total amount of 

coating solids 

delivered to the 

coating application 

system.

No change from SIPapproved version other 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

than renumbering.

108. Unauthorized emissions--Emissions of any air 

contaminant except carbon dioxide, water, 

nitrogen, methane, ethane, noble gases, 

hydrogen, and oxygen that exceed any air 

emission limitation in a permit, rule, or order of 

the commission or as authorized by Texas Clean 

Air Act, §382.0518(g).

Unauthorized emissions--Emissions of any air 

contaminant except carbon dioxide, water, nitrogen, 

methane, ethane, noble gases, hydrogen, and 

oxygen that exceed which exceeds any air emission 

limitation in a permit, rule, or order of the 

commission or as authorized by Texas Clean Air 

Act TCAA, §382.0518(g).

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(104). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

106. True vapor 

pressure--The 

absolute aggregate 

partial vapor 

pressure, measured 

in pounds per square 

inch absolute, of all 

volatile organic 

compounds at the 

temperature of 

storage, handling, or 

processing.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

109. Unplanned maintenance, startup, or 

shutdown activity--For activities with 

unauthorized emissions that are expected to 

exceed a reportable quantity or with excess 

opacity, an unplanned maintenance, startup, or 

shutdown activity is:

(A) a startup or shutdown that was not part 

of normal or routine facility operations, is 

unpredictable as to timing, and is not the type of 

event normally authorized by permit; or

(B) a maintenance activity that arises from 

sudden and unforeseeable events beyond the 

control of the operator that requires the 

immediate corrective action to minimize or 

avoid an upset or malfunction.

Definition not revised in the June 10, 2005 

submittal.

107. Unauthorized 

emissions--

Emissions of any air 

contaminant except 

carbon dioxide, 

water, nitrogen, 

methane, ethane, 

noble gases, 

hydrogen, and 

oxygen that exceed 

any air emission 

limitation in a 

permit, rule, or order 

of the commission 

or as authorized by 

Texas Clean Air 

Act, §382.0518(g).

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

110. Upset event--an unplanned and unavoidable 

breakdown or excursion of a process or 

operation that results in unauthorized emissions. 

A maintenance, startup, or shutdown activity 

that was reported under §101.211 of this title 

(relating to Scheduled Maintenance, Startup, and 

Definition not revised in the June 10, 2005 

submittal.

108. Unplanned 

maintenance, 

startup, or 

shutdown activity--

For activities with 

unauthorized 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

Shutdown Reporting and Recordkeeping 

Requirements), but had emissions that exceeded 

the reported amount by more than a reportable 

quantity due to an unplanned and unavoidable 

breakdown or excursion of a process or 

operation is an upset event.

emissions that are 

expected to exceed a 

reportable quantity 

or with excess 

opacity, an 

unplanned 

maintenance, 

startup, or shutdown 

activity is:

(A) a startup or 

shutdown that was 

not part of normal or 

routine facility 

operations, is 

unpredictable as to 

timing, and is not 

the type of event 

normally authorized 

by permit; or

(B) a 

maintenance activity 

that arises from 

sudden and 

unforeseeable events 

beyond the control 

of the operator that 

requires the 

immediate 

corrective action to 

minimize or avoid 

an upset or 

malfunction.

No change from SIPapproved version other 

than renumbering.

111. Utility boiler--A boiler used to produce electric 

power, steam, or heated or cooled air, or other 

gases or fluids for sale.

Definition not revised in the June 10, 2005 

submittal.

109. Upset event--an 

unplanned and 

unavoidable 

breakdown or 

excursion of a 

process or operation 

that results in 

unauthorized 

emissions. A 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

maintenance, 

startup, or shutdown 

activity that was 

reported under 

§101.211 of this title 

(relating to 

Scheduled 

Maintenance, 

Startup, and 

Shutdown Reporting 

and Recordkeeping 

Requirements), but 

had emissions that 

exceeded the 

reported amount by 

more than a 

reportable quantity 

due to an unplanned 

and unavoidable 

breakdown or 

excursion of a 

process or operation 

is an upset event.

No change from SIPapproved version other 

than renumbering.

112. Vapor combustor--A partially enclosed 

combustiond device used to destroy volatile 

organic compounds by smokeless combustion 

without extracting energy in the form of process 

heat or steam. The combustion flame may be 

partially visible, but at no time does the device 

operate with an uncontrolled flame. Auxiliary 

fuel and/or a flame air control damping system 

that can operate at all times to control the air/fuel 

mixture to the combustor's flame zone, may be 

required to ensure smokeless combustion during 

operation.

Definition not revised in the June 10, 2005 

submittal.

110. Utility boiler--A 

boiler used to 

produce electric 

power, steam, or 

heated or cooled air, 

or other gases or 

fluids for sale.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

113. Vapor-mounted seal--A primary seal mounted 

so there is an annular space underneath the seal. 

The annular vapor space is bounded by the 

bottom of the primary seal, the tank wall, the 

liquid surface, and the floating roof or cover.

Definition not revised in the June 10, 2005 

submittal.

111. Vapor combustor--

A partially enclosed 

combustion device 

used to destroy 

volatile organic 

compounds by 

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

smokeless 

combustion without 

extracting energy in 

the form of process 

heat or steam. The 

combustion flame 

may be partially 

visible, but at no 

time does the device 

operate with an 

uncontrolled flame. 

Auxiliary fuel 

and/or a flame air 

control damping 

system that can 

operate at all times 

to control the 

air/fuel mixture to 

the combustor's 

flame zone, may be 

required to ensure 

smokeless 

combustion during 

operation.

No change from SIPapproved version other 

than renumbering.

114. Vent--Any duct, stack, chimney, flue, conduit, 

or other device used to conduct air contaminants 

into the atmosphere.

Definition not revised in the June 10, 2005 

submittal.

112. Vapor-mounted 

seal--A primary seal 

mounted so there is 

an annular space 

underneath the seal. 

The annular vapor 

space is bounded by 

the bottom of the 

primary seal, the 

tank wall, the liquid 

surface, and the 

floating roof or 

cover.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

115. Visible emissions--Particulate or gaseous matter 

that can be detected by the human eye. The 

radiant energy from an open flame is not 

considered to be a visible emission under this 

definition.

Visible emissions--Particulate or gaseous matter 

that which can be detected by the human eye. The 

radiant energy from an open flame is not considered 

to be a visible emission under this definition.

These revisions are non-substantive in nature and 

approvable. Note that the existing SIP language 

already incorporates these revisions but EPA has 

not formally provided an analysis of the submittal 

until now. Also note that in the 2005 submittal this 

definition was numbered as 101.1(110). EPA 

approved the renumbering in our previous SIPactions but never addressed the non-substantive 

revisions.

113. Vent--Any duct, 

stack, chimney, flue, 

conduit, or other 

device used to 

conduct air 

contaminants into 

the atmosphere.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

116. NOTE: The definition of Volatile organic 

compound below is as corrected in the Texas 

Register February 25, 2011 (36 TexReg 1304) 

and submitted to EPA May 26, 2011:

TXd132 (115) Volatile organic compound--

As defined in 40 Code of Federal Regulations 

§S1.100(s), except §51.100(s)(2) - (4), as 

amended on January 21, 2009 (74 FR 3441).

Volatile organic compound below is as corrected 

in the Texas Register February 25, 2011 (36 

TexReg 1304) and submitted to EPA May 26, 2011:

TXd132 (115) Volatile organic compound--As 

defined in 40 Code of Federal Regulations 

§S1.100(s), except §51.100(s)(2) - (4), as amended 

on January 21, 2009 (74 FR 3441).

This supercedes the submitted definition change in 

2005.

114. Visible emissions--

Particulate or 

gaseous matter that 

can be detected by 

the human eye. The 

radiant energy from 

an open flame is not 

considered to be a 

visible emission 

under this definition.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.

117. Volatile organic compound (VOC) water 

separator--Any tank, box, sump, or other 

container in which any VOC, floating on or 

contained in water entering such tank, box, 

sump, or other container, is physically separated 

and removed from such water prior to outfall, 

drainage, or recovery of such water.

Definition not revised in the June 10, 2005 

submittal.

115. Volatile organic 

compound--As 

defined in 40 Code 

of Federal 

Regulations 

§S1.100(s), except 

§51.100(s)(2) - (4), 

as amended on 

January 21, 2009 

(74 FR 3441).

On December 28, 2011, 

EPA SIP-approved the

definition of “volatile 

organic compound” as 

adopted by TCEQ 

February 9, 2011, 

115. Volatile organic 

compound--As 

defined in 40 Code

of Federal 

Regulations 

§S1.100(s), except 

§51.100(s)(2) - (4), 

as amended on 

January 21, 2009 (74 

FR 3441).

On December 28, 2011, 

EPA SIP-approved the

definition of “volatile 

organic compound” as 

adopted by TCEQ 

February 9, 2011, effective 

115. Volatile organic 

compound--As 

defined in 40 Code of 

Federal Regulations 

§S1.100(s), except 

§51.100(s)(2) - (4), as 

amended on January 

21, 2009 (74 FR 

3441).

On December 28, 2011, 

EPA SIP-approved the

definition of “volatile 

organic compound” as 

adopted by TCEQ 

February 9, 2011, effective 

March 3, 2011, submitted 
30 TAC 101.1 – Definitions

SIP-Approved

Adopted: May 25, 2005

Effective: June 15, 2005

Submitted: June 10, 2005

Adopted: July 25, 2007

Effective: August 16, 

2007

Submitted: August 16, 

2007

Adopted: March 10, 

2010

Effective: April 1, 2010

Submitted: April 6, 2010

Adopted: February 9, 

2011

Effective: March 3, 2011

Submitted March 11, 

2011

effective March 3, 2011,

submitted to EPA March 

11, 2011; with corrections 

submitted May 26, 2011. 

See 76 FR 81371,

effective January 27, 

2012. 

EPA-R06-OAR-2008-

0638.

March 3, 2011, submitted 

to EPA March 11, 2011; 

with corrections submitted 

May 26, 2011. 

See 76 FR 81371, effective 

January 27, 2012. 

EPA-R06-OAR-2008-

0638.

to EPA March 11, 2011; 

with corrections submitted 

May 26, 2011. 

See 76 FR 81371, effective 

January 27, 2012. 

EPA-R06-OAR-2008-0638.

New row added as a result of renumbering. This 

entry not in SIP.

Definition not revised in the June 10, 2005 

submittal.

116. Volatile organic 

compound (VOC) 

water separator--

Any tank, box, 

sump, or other 

container in which 

any VOC, floating 

on or contained in 

water entering such 

tank, box, sump, or 

other container, is 

physically separated 

and removed from 

such water prior to 

outfall, drainage, or 

recovery of such 

water.

No change from SIPapproved version other 

than renumbering.

No change from the 

revised definition 

submitted as a SIP 

revision on August 16, 

2007.

No change from the revised 

definition submitted as a 

SIP revision on August 16, 

2007.
III. Conclusion

The above analysis demonstrates that the following revisions to 30 TAC 101.1 are fully 

approvable:

 All non-substantive revisions to 30 TAC 101.1 adopted on May 25, 2005 and submitted 

as a SIP revision on June 10, 2005 as part of Rule Project Number 2005-009-116-PR. 

Note that EPA previously approved subsequent substantive revisions to “maintenance 

area”, “nonattainment area”, and “VOC”. Our later approval of subsequent revisions to 

these specific definitions supercede the 2005 submitted revisions.

 All revisions to 30 TAC 101.1 adopted on July 25, 2007 and submitted as a SIP revision 

on August 16, 2007 as part of Rule Project Number 2006-053-101-PR.

 The revisions to “reportable quantity” and “volatile organic compound” adopted on 

March 10, 2010 and submitted as a SIP revision on April 6, 2010, have been superceded 

by EPA’s approval of the revisions to the same definitions adopted on February 9, 2011 

and submitted on March 11, 2011.

 The revisions to 30 TAC 101.1 “maintenance area”, “nonattainment area”, “reportable 

quantity”, and “volatile organic compound” adopted on February 9, 2011 and submitted 

on March 11, 2011, with corrections submitted on May 26, 2011, have already been 

approved by EPA. 

 However, our December 28, 2011, approval did not address the renumbering of the other 

definitions that had been adopted July 25, 2007 and carried forward into subsequent SIP 

submittals. Therefore, the renumbering through the March 11, 2011 SIP submittal is fully 

approvable.