SIP: Glossary and Abbreviations

This page defines terms and spells out abbreviations used frequently in the SIP and the Web pages related to it.

• Glossary
• Abbreviations

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Glossary

1-hour ozone standard—See one-hour ozone standard.

8-hour ozone standard—See eight-hour ozone standard.

adoption—Rules are adopted by the TCEQ’s commissioners. Rules are enforceable at the state level upon adoption by the Commission, and are enforceable at the federal level upon approval by the EPA.

(Ozone) Air Quality Classifications—For the ozone NAAQS, an area’s attainment status is defined by a “classification”:

• Extreme: The area has a design value of 0.187 ppm or above and has 20 years to attain.
• Severe 17: The area has a design value of 0.127–0.187 ppm and has 17 years to attain.
• Severe 15: The area has a design value of 0.120–0.127 ppm and has 15 years to attain.
• Serious: The area has a design value of 0.107–0.120 ppm and has nine years to attain.
• Moderate: The area has a design value of 0.092–0.107 ppm and has six years to attain.
• Marginal: The area has a design value of 0.085 up to 0.092 ppm and has three years to attain.

attainment demonstration—A plan to demonstrate how the nonattainment area expects to meet the National Ambient Air Quality Standards by the deadline.

control strategy—Measures to deal with air pollution. Examples of control strategies include an emissions trading program or vehicle inspection and maintenance.

eight-hour ozone standard—The new indicator of air quality acceptability as it pertains to ground-level ozone. The current threshold value for this standard is 0.08 ppm, measured as maximum daily eight-hour average concentrations. To attain the ozone National Ambient Air Quality Standard, the three-year average of the annual fourth-highest daily maximum eight-hour ozone concentration must not exceed 0.08 ppm.

near nonattainment area—A geographic area that meets national ambient air quality standards but only by a slim margin. The term is most often applied to areas that comply with the one-hour ozone standard but fail to meet the new—but currently unenforceable—eight-hour ozone standard.

nonattainment area—A geographic area that fails to meet a NAAQS. An area must be officially designated by the EPA, under procedures set forth by the Federal Clean Air Act, in order to be classified in nonattainment. An area that complies with a NAAQS is generally known as an “attainment area,” although that is not an official classification under the Federal Clean Air Act.

offsets (pollution offsets, industrial growth offset)—The reduction of current emissions at a rate equal to or greater than the amount of emissions expected to be produced in a new project. The offset ratio is determined by the severity of the ozone problem in a particular area.

one-hour ozone standard—The former indicator of air quality acceptability as it pertains to ground-level ozone. This indicator involves taking an average 1-hour concentration of pollutants. The current threshold is 0.12 parts per million (ppm). An area meets the ozone National Ambient Air Quality Standard if the monitored ozone level does not exceed the standard more than three times over a consecutive three-year period.

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Abbreviations

A  |  B  |  C  |  D  |  E  |  F  |  G  |  H  |  I  |  J  |  K  |  L  |  M

N  |  O  |  P  |  Q  |  R  |  S  |  T  |  U  |  V  |  W  |  X  |  Y  |Z

ACT—alternative control techniques

AFV—alternative-fuel vehicle

APA—Administrative Procedure Act

ASC—area source categories

ASM—acceleration simulation mode

BACM—best available control measure

BACT—best available control technology

BPA—Beaumont–Port Arthur

CAA—Clean Air Act

CAMx—Comprehensive Air Model with Extensions

CARB—California Air Resources Board

CFR—Code of Federal Regulations

CMSA—Consolidated Metropolitan Statistical Area

CNG—compressed natural gas

CO—carbon monoxide

COAST—Coastal Oxidant Assessment for Southeast Texas

CTG—control technique guidelines

DERC—Discrete Emission Reduction Credit

DFW—Dallas—Fort Worth

DOW—day of the week

DPS—Texas Department of Public Safety

DV—design value

EGF—electric generating facilities

EGR—exhaust gas recirculation

EI—Emissions Inventory

EIQ—Emissions Inventory Questionnaire

ELP—El Paso

EPA—U.S. Environmental Protection Agency

EPN—emission point number

ERC—emission-reduction credit

FACA—Federal Advisory Committee Act

FIP—Federal Implementation Plan

FMVCP—Federal Motor Vehicle Control Program

FR—Federal Register

FTE—full-time equivalent employee

FTP—File Transfer Protocol

g/hp-hr—grams per horsepower-hour

GIS—Geographic Information System

g/mi—grams per mile

GVWR—gross vehicle weight rating

HAP—hazardous air pollutant

HB—House Bill

HC—hydrocarbon

HDD—heavy-duty diesel

HDDV—heavy-duty diesel vehicle

HDV—heavy-duty vehicle

HGAC—Houston-Galveston Area Council

HGB—Houston-Galveston-Brazoria

HOV—high-occupancy vehicle

hp—horsepower

HPMS—Highway Performance Monitoring System

HRM—Houston Regional Monitoring

kg/ha—kilograms per hectare

km—kilometer

LDT—light-duty truck

LED—low-emission diesel

LEV—low-emission vehicle

LNG—liquefied natural gas

LSG—low-sulfur gasoline

m—meter

MACT—maximum achievable control technology

MMBtu—million British thermal units

MPA—Metropolitan Planning Area

MPH—miles per hour

MY—model year

NAAQS—National Ambient Air Quality Standard

NCTCOG—North Central Texas Council of Governments

NEGU—non-electric generating units

NNSR—nonattainment new source review

NO_x—nitrogen oxides

NO_y—nitrogen species

NSR—new source review

NWS—National Weather Service

O₃—ozone

OAQPS—Office of Air Quality Planning and Standards

OBD—onboard diagnostics

OSAT—ozone-apportionment technology

OTAQ—the EPA’s Office of Transportation and Air Quality

PAMs—photochemical assessment monitoring sites

Pb—lead

PCV—positive crankcase ventilation

PEI—Periodic Emissions Inventory

PM—particulate matter

PM_2.5—particulate matter smaller than 2.5 microns

PM₁₀—particulate matter smaller than 10 microns

ppb—parts per billion

ppm—parts per million

ppmv—parts per million by volume

PSI—pounds per square inch

PSIA—pounds per square inch absolute

QA/QC—quality assurance / quality control

RACT—reasonably available control technology

RAQPC—Regional Air Quality Planning Committee

REMI—Regional Economic Modeling, Inc.

RFG—reformulated gasoline

ROP—rate of progress

RPM—revolutions per minute

RVP—Reid vapor pressure

SAE—Society of Automotive Engineers

SB—Senate Bill

SB 5—Senate Bill 5 (passed by the 77th Texas Legislature, 2001)

SCC—source classification code

SETRPC—Southeast Texas Regional Planning Commission

SIC—Standard Industrial Classification

SIP—State Implementation Plan

SO₂—sulfur dioxide

SO_x—sulfur compounds

SOCMI—synthetic organic chemical manufacturing industry

SULEV—super-ultra-low-emission vehicle

TAC—Texas Administrative Code

TCAA—Texas Clean Air Act

TCEQ—Texas Commission on Environmental Quality

TCM—transportation control measures

TERP—Texas Emission Reduction Plan

TIP—Transportation Implementation Plan

TMC—Texas Motorist’s Choice

TMO—Transportation Management Organization

TNRCC—Texas Natural Resource Conservation Commission (the former name for the TCEQ

TPD—tons per day

TPY—tons per year

TSP—total suspended particulate

TTI—Texas Transportation Institute

TxDOT—Texas Department of Transportation

VID—Vehicle Identification Database

VIN—Vehicle Identification Number

VIR—vehicle inspection report

VMAS—Vehicle Mass Analysis System

VMEP—Voluntary Mobile Source Emissions Reduction Program

VMT—vehicle miles traveled

VOC—volatile organic compounds

VRF—Vehicle Repair Form

WOE—weight of evidence

ZEV—zero-emission vehicle

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