Reports from Air
Quality Research and Contract Projects related to Emissions
Inventory are posted here as PDF files (Help with PDF)
unless otherwise specified. Some reports have companion data files
in various formats.
Reports related to On-Road Mobile Emissions Inventory are on a
separate page.
Top-down Emissions Verification (TDEV) of Industrial Emissions in
Houston Based on TexAQS II Data - This report, developed
through a work order with Earth System Science Center at University
of Alabama in Huntsville, assesses the accuracy of emissions of
HRVOCs emitted by sources in the Houston Ship Channel (HSC). The
assessment was to be made by comparing ambient measurements of
HRVOCs collected by the SOF monitoring and by aircraft (e.g.,
Baylor Aztec, NOAA P-3) with modeled concentration predicted from
the UAH LESchem model. The LESchem model can be run at grid sizes
down to 150 meters and time-steps of 5 minutes, which can resolve
turbulent eddies. This in turn allows the determination of
turbulent chemistry as well as the mean chemistry in an air parcel.
The mean chemistry is the chemistry addressed by photochemical
models such as CAMx and CMAQ. The meteorological parameters for the
UAH LESchem model are provided by the RAMS meso-scale model, in
fact the UAH model is actually referred to as the RAMS-LESchem
model. The RAMS-LESchem model was applied to a set of five nested
domains centered on the HSC, with grid sizes from 12.15 km down to
150 meters. Due to a number of reasons discussed in the report,
meteorological parameters (e.g., PBL) of sufficient accuracy could
not be simulated. As the author suggests, it may have been
premature to apply an LESchem model to a region as complex as the
HSC. (September 2008)
Staff Contact: Call Dick Karp at 512/239-1462 or e-mail
us at aqp@tceq.state.tx.us and put
“Attn: Dick Karp” in the subject line.
Data Collection, Sampling and Emissions Inventory Preparation Plan
for Selected Commercial and Industrial Equipment: Phase II
- This report, developed through a work order with Eastern Research
Group, Inc. (ERG), documents a study to estimate equipment
populations, activity profiles, and resulting emissions for certain
industrial and commercial non-road equipment. This study focused
mainly on characterizing equipment population and activity profiles
for Forklifts, Transportation Refrigeration Units, Terminal
Tractors, and stationary diesel generators in the 9-county DFW
area. The findings from the forklift analysis were specifically
extended to the 8-county HGB non-attainment area as well. (August
2005)
Staff Contact: Call Anusuya Iyer at 512/239-1435 or
e-mail us at aqp@tceq.state.tx.us and put
“Attn: Anusuya Iyer” in the subject line.
Area and Mobile Source Emission Inventory Technical Support
Project: 1990 - 2010 Emission Inventory Trends and
Projections - This report, developed through a work order
with Environ International, documents development of an update to
the 1999 area, non-road and biogenic emission inventories and
development of 1990 to 2010 trend/projected inventories for
On-Road, nOn-Road and area sources. All the inventories include
VOCs, NOx, CO, SO2, and particulate matter
(both PM10 and PM2.5). The trend inventories
include development of 1990 to 2010 annual and ozone season day
emission trends and projections for all area, on-road mobile, and
nOn-Road mobile sources. (August 2001)
Staff Contact: Call Mary McGarry-Barber at 512/239-1987
or e-mail us at aqp@tceq.state.tx.us and put
“Attn: Mary McGarryBarber” in the subject line.
Source Attribution and Emission Adjustment Study - Task 1:
Back-Trajectory Climatology and Identification of Key Source
Regions - This report was completed by Yulong Xie and Carl
Berkowitz of Battelle Memorial Institute, and was supported by
grant money from EPA and TCEQ. This study examines the automated
gas chromatography data collected by the Enhanced Industry
Sponsored Monitoring network in 2003. The dense network of auto-GCs
allowed the chemical data to be combined with a detailed back
trajectory analysis to estimate the locations, and possibly, the
strength of VOC sources in the industrial areas of Houston.
(January, 2005)
Staff Contact: Call Mark Estes at 512/239-6049 or e-mail
us at aqp@tceq.state.tx.us and put
“Attn: Mark Estes” in the subject line.
Ground Truth Verification of Emissions in the Houston Ship Channel
Area (Revised) - This report, developed through a work
order with Sonoma Technology, Inc., summarizes the work conducted
and the findings based on site visits to eight facilities that
represent an array of reactive volatile organic compound emission
sources for petrochemical facilities of varying sizes near the
Houston Ship Channel area. It includes (a) a description of the
on-site truth activities conducted during winter 2001-2002, (b)
statistical summaries of emission discrepancies, and (c)
recommendations to improve emission estimation and/or reporting
procedures. (August 2002)
Staff Contact: Call Kathy Pendleton at 512/239-1936 or
e-mail us at aqp@tceq.state.tx.us and put
“Attn: Kathy Pendleton” in the subject line.
Development of Gridded Spatial Allocation Factors for the State of
Texas (Updated) - This report, developed through a work
order with Sonoma Technology Inc., provides details of a project to
develop gridded spatial allocation factors for the state of Texas.
The factors will be used to geographically distribute area and non
road mobile source emissions which were developed from spatial
surrogate data. Gridded spatial factors for a 2000 base-year were
developed for the entire state as well as portions of Louisiana,
Arkansas, and Oklahoma. This report has a
companion data file in Comma Separated Values format (CSV).
(August 2001)
Staff Contact: Call Jim Smith at 512/239-1941 or e-mail
us at aqp@tceq.state.tx.us and put
“Attn: Jim Smith” in the subject line.
Development of Source Speciation Profiles from the 2000 TCEQ Point
Source Database - This report, developed through a work
order with Pacific Environmental Services, Inc. under a subcontract
to Environ International Corp., provides detail on a project that
reviewed existing data from the 2000 TCEQ Point Source Database
(PSDB) and developed source specific and SCC specific volatile
organic compound speciation profiles that may be used to improve
the point source speciation of these emissions for future modeling
episodes. (August 2002)
Staff Contact: Call Jocelyn Mellberg at 512/239-0164 or
e-mail us at aqp@tceq.state.tx.us and put
“Attn: Jocelyn Mellberg” in the subject line.
Development of Source Speciation Profiles from the 2000 TCEQ Point
Source Database - Memo - This memo, provided by Pacific
Environmental Services, Inc, summarizes the development of point
source emissions profile based on the TCEQ's 2000 Point Source
Database (PSDB). (February 2002)
Staff Contact: Call Jocelyn Mellberg at 512/239-0164 or
e-mail us at aqp@tceq.state.tx.us and put
“Attn: Jocelyn Mellberg” in the subject line.
Development of Source Speciation Profiles from the 1999 TCEQ Point
Source Database - This report, from Pacific Environmental
Services, Inc. under a subcontract to Environ International Corp.,
provides detail on a project that reviewed existing data from the
1999 TCEQ Point Source Database (PSDB) and developed source
specific and SCC specific volatile organic compound speciation
profiles that may be used to improve the point source speciation of
these emissions for future modeling episodes. This report has a set
of Microsoft Access database files, compressed in a
single zip file. (August 2001)
Staff Contact: Call Jim Neece at 512/239-1524 or e-mail
us at aqp@tceq.state.tx.us and put
“Attn: Jim Neece” in the subject line.
High Resolution Solar Radiation Data for Biogenic Emissions
Modeling for 2000 Ozone Episodes in the Houston Area - This
report, from the University of Maryland, provides the results of a
study undertaken to produce high-resolution fluxes of
photosynthetically active radiation over the Houston area. The
report describes the development of the high resolution data,
appropriate support information and a discussion of the data
sources, analysis and quality assurance procedures. The data
developed by this project include shortwave downward radiation,
photosynthetically active solar radiation, and cloud cover at
hourly, daily, and instantaneous averaging times, at 1/8 degree and
1/16 degree (4-km) spatial resolution, for the period August 15 -
Sept 18, 2000. The 1/8 degree data include the entire US; the 1/16
degree data include the extended Texas area. These data are
available upon request. (August 2002)
Staff Contact: Call Mark Estes at 512/239-6049 or e-mail
us at aqp@tceq.state.tx.us and put
“Attn: Mark Estes” in the subject line.
High Resolution Solar Radiation Data for Biogenic Emissions
Modeling for 1998 Ozone Episodes in the Houston Area - This
report, from the University of Maryland, provides the results of a
study undertaken to produce high-resolution fluxes of
photosynthetically active radiation over the Houston area. The
report describes the development of the high resolution data,
appropriate support information and a discussion of the data
sources, analysis and quality assurance procedures. (August
2001)
Staff Contact: Call Mark Estes at 512/239-6049 or e-mail
us at aqp@tceq.state.tx.us and put
“Attn: Mark Estes” in the subject line.
Biogenic VOC Emission Estimates for the TexAQS 2000 Emission
Inventory: Estimating Emissions during Periods of Drought and
Prolonged High Temperatures and Developing GloBEIS3 - This
report, provided by ENVIRON International Corp., describes the
development of Globeis3, which includes modules that will help
account for biogenic emission changes due to drought and prolonged
high temperatures. TCEQ commissioned this revision to Globeis in
order to apply the best available information to the biogenic
inventory for the drought-stricken summer of 2000. The model itself
and its User's Guide are available from Environ's GloBEIS Web Site
. (April 2002)
Staff Contact: Call Mark Estes at 512/239-6049 or e-mail
us at aqp@tceq.state.tx.us and put
“Attn: Mark Estes” in the subject line.
Review of the Effects of Drought and High Temperatures on Biogenic
Emissions, and Future Biogenic Research Efforts in Texas -
This report, written by Alex Guenther of the National Center for
Atmospheric Research, covers two topics. The first topic is a
literature review of journal articles and other studies that
focussed on how drought and high temperatures affect biogenic
organic compound emissions from vegetation. After reviewing the
available evidence, the author recommends methods for modifying
GLOBEIS that will take into account drought and high temperature
effects, as they are currently understood. The second topic is a
discussion of research approaches that could be used to validate
biogenic emissions modeling in Texas. (August 2001)
Staff Contact: Call Mark Estes at 512/239-6049 or e-mail
us at aqp@tceq.state.tx.us and put
“Attn: Mark Estes” in the subject line.
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