This page is periodically updated to indicate recent developments in this web site. Scanning this page eliminates the need to examine the entire web domain for changes. Look at entries before April 96 , between April 96 - July 96 and between July 96 - October 96.


Weaknesses
AQ Weaknesses
Bullet #1: Strike the word "even". Measurements have bias, as well. Both the uncertainty and bias of data can increase when couple...
Submitted by Edgerton Eric on 2/18/97
Volume II: Summary and Integration--Development
Bullet 5: Present NOx trends as in trends report, by source category, i.e. mobile source and stationary source.

Paragraph two, sentence two: Is th...

Submitted by API API on 2/18/97
Volume II: Summary and Integration--Otag Model Evaluation
Note Husar side-by-side movies
Submitted by API API on 2/18/97
Volume II: Summary and Integration--Transport Analyses
Paragraph two, sentence two: For what distance?

Paragraph two, sentence three: Does the NOz continue to contribute to the formation of ozone?

Pa...

Submitted by API API on 2/18/97
Volume II: Summary and Integration--Transport Analyses
Does the NOz continue to contribute to the formation of ozone?
Submitted by API API on 2/18/97
Volume II: Summary and Integration--Transport Analyses
Second paragraph, third sentence: For what distance?
Submitted by API API on 2/18/97
Volume II: Summary and Integration--Transport Analyses
Second paragraph, third sentence: For what distance?
Submitted by API API on 2/18/97
Volume II: Summary and Integration--Transport Analyses
Paragraph two, sentence one: Include references here
Submitted by Feldman Howard on 2/18/97
Volume II: Summary and Integration--Spatial and Temporal
Bullet one comment: Aren't we finding that ozone concentrations tend to be highest in areas of the highest emissions density? Therefore, corner area...
Submitted by API API on 2/18/97
Volume II: Summary and Integration--AQAWG
Should major policy questions considered by the AQAWG be reviewed in this section?
Submitted by Feldman Howard on 2/18/97
Volume II: Summary and Integration--Background
Information should be presented on the current non-attainment problem and contrast to the 1990 CAA non-attainment problem. Certainly fewer areas now.
Submitted by API API on 2/18/97
Volume II: Summary and Integration
Information should be presented on the current non-attainment problem and contrast to the 1990 CAA non-attainment problem. Certainly fewer areas now.
Submitted by API API on 2/18/97
Volume II: Summary and Integration--Background
Describe and illustrate current nonattainment problem and role of transport. Discuss CASAC recommendations for an 8-hour standard and EPA’s proposal ...
Submitted by Feldman Howard on 2/18/97
API API has registered
Technical and policy issues
Submitted by API API on 2/18/97
Volume I: Executive Summary--Opening Page
Last paragraph: To the sentence and in many cases they demonstrate independent corroboration of many of the lessons learned from modeling repl...
Submitted by West Jeffrey on 2/18/97
Volume II: Summary and Integration--Recommendations
Replace conducting with integrating in the first paragraph

Recommendations

  • Examine the causes of the relatively poor model ...
Submitted by West Jeffrey on 2/18/97
Volume II: Summary and Integration--OTAG Model Evaluation
In the last paragraph, insert the word regional between evaluating and control in the second to the last sentence.
Submitted by West Jeffrey on 2/18/97
Volume II: Summary and Integration--Impact of an 8-hour Standard
Delete For reasons noted above,...analysis, are currently available. from the last paragraph
Submitted by West Jeffrey on 2/18/97
Volume II: Summary and Integration
First paragraph after last bullet--Delete Poirot (personal communications)...warrent further investigation.--HERESAY
Submitted by West Jeffrey on 2/18/97
Volume I: Executive Summary--Recommendation to Foster
Sentence 1, replace conducting policy-relevant with integrating scientific and and efforts with and policy making and Add ...
Submitted by West Jeffrey on 2/18/97
Volume I: Executive Summary--UAM-V model use
Sentence 1, insert after large-scale regional and insert after future regional. Sentence 4, insert after is that <...
Submitted by West Jeffrey on 2/18/97
Volume I: Executive Summary--High-leverage
However, it should be noted that urban non-attainment areas still contribute significantly to Thai own problem and that urban plumes contribute signif...
Submitted by West Jeffrey on 2/18/97
Volume I: Executive Summary--Evidence of Precursor
Reference the technical studies supporting this.
Submitted by West Jeffrey on 2/18/97
Volume I: Executive Summary--Lifetime of Ozone
What is the technical basis for this statement, There is evidence that ozone formation...
Submitted by West Jeffrey on 2/18/97
Volume I: Executive Summary--Ozone transport
Second Paragraph, add after stagnation with limited transport, and add after followed by large scale

However, it shou...

Submitted by West Jeffrey on 2/18/97
Volume I: Executive Summary--Exceedances
Need a map showing extrapolations.
Submitted by West Jeffrey on 2/18/97
Volume I: Executive Summary--Ozone variance in time and space
Add The urban influence can be enhanced when urban areas of influence overlap or result from nighttime transport in front of sentence It is ...
Submitted by West Jeffrey on 2/18/97
Volume I: EXECUTIVE SUMMARY--Ozone on the Edges
I think a review of rural sites such as Shennandoah or Whiteface will show higher value on a hot summer day due to biogenic activity.
Submitted by West Jeffrey on 2/18/97
Volume I: EXECUTIVE SUMMARY--Precursor emissions
Paragraph 1, Sentence 1, insert after Anthropogenic and biogenic sentence 1, delete anthropogenic in front of ozone.... se...
Submitted by West Jeffrey on 2/18/97
Re: Weight of Evidence Approach
Good point regarding convergence and divergence. In terms
of "increasing confidence" versus "reducing uncertainty",
you may be right from a str...
Submitted by Guinnup David on 2/18/97
Weight of Evidence Approach
It is important to note that we are looking for lines of convergence and divergence from independent analyses, not merely 'directional corroboration'....
Submitted by Edgerton Eric on 2/18/97
Re: Under or Over?
You're right Rich. thanks
Submitted by Guinnup David on 2/14/97
Under or Over?
Is this not backwards: "There appear to be sometendencies for the model to over predict daily maximum ozone levels in the northern portion of the
d...
Submitted by Poirot Richard on 2/13/97
Final Report for the OTAG Air Quality Analysis Workgroup--Volume I: EXECUTIVE SUMMARY
The Air Quality Analysis (AQA) workgroup of OTAG has been formed to develop analyses based on air quality data which can be used to independently chec...
Submitted by Stoeckenius Till on 2/13/97
Episode Comparisons
This is a very informative analysis! I wonder if it would be possible to compare the aggregated model vectors and residence times with the upper 10 pe...
Submitted by Poirot Richard on 2/11/97
Edward Doty has registered
Review of data output files, including "movies", for staff educational purposes.
Submitted by Doty Edward on 2/11/97
Update on the Characterization of Transport over the Eastern US
This report presents the continuation of the work to characterize the summer time transport over the Eastern US during high and low ozone conditions f...
Submitted by Schichtel Bret on 2/10/97
Air Quality conference call
The Air Quality Analysis Workgroup will hold conference call on Friday, February, 14, 1997, at 1:00 p.m. (EST). To participate, please call (703)...
Submitted by Guinnup David on 2/6/97
Tammie Sparks has registered
Emissions Inventory and Analysis
Submitted by Sparks Tammie on 2/6/97
Deborah Amaral has registered
Analysis of Market Trading
Submitted by Amaral Deborah on 2/4/97
Policy-Relevant Executive Summary of AQAWG Results
The major policy-relevant results, conclusions and recommendations from the AQA workgroup are presented. The conclusions fall into the following maj...
Submitted by Guinnup David on 2/4/97
Technical Summary and Integration of AQAWG Results
A concise summary of the main technical findings derived from the OTAG AQA workgroup analyses and other studies.
Submitted by Stoeckenius Till on 2/4/97
Summaries of Individual AQAWG Analyses
A brief summary and critical review of each of the AQAWG analyses. Each summary describes the purpose, methodology, and major findings, including li...
Submitted by Stoeckenius Till on 2/4/97
Summaries of Individual AQAWG Analyses
A brief summary and critical review of each of the AQAWG analyses. Each summary describes the purpose, methodology, and major findings, including li...
Submitted by Stoeckenius Till on 2/4/97
John Langstaff has registered
Policy and strategy analysis, air quality modeling, analysis of AQ, emissions and met data, obs-based models, uncertainty and variability.
Submitted by Langstaff John on 2/1/97
Something wrong in ONCS90vy.zip data
I tried to download the data set of ONCS90vy.zip, but I couldn't.
The others are fine to be downloaded. What's wrong in the 1990 data set?
Plea...
Submitted by Kim Hag-Yeol on 1/31/97
Status Report to OTAG Air Quality Analysis Workgroup: 12/3/96
This provides an update of a backward air trajectory analysis project conducted for the OTAG Air Quality Analysis Workgroup by VT DEC. Also summarize...
Submitted by Poirot Richard on 1/27/97
Mike Walker has registered
Air quality analysis and modeling data
Submitted by Walker Mike on 1/21/97
Mike Walker has registered
Air quality analysis and modeling data
Submitted by Walker Mike on 1/21/97
Criteria Pollutants
"Criteria pollutants" are indicators of air quality and EPA has established a maximum concentration (National Ambient Air Quality Standards) above whi...
Submitted by Husar Rudolf on 1/18/97
NATIONAL PRIMARY AND SECONDARY AMBIENT AIR QUALITY STANDARDS
Definitions, scope, reference conditions, magnitudes for NAQS.
Submitted by Husar Rudolf on 1/18/97
Nonattainment Areas for Criteria Pollutans - EPA OAQPS Green Book
Areas of the country where air pollution levels persistently exceed the national ambient air quality standards are designated "nonattainment." Thise a...
Submitted by Husar Rudolf on 1/17/97
Hag-Yeol Kim has registered
I am a Ph.D. student in City and Regional Planning at the Ohio State University.
My research is focused on the air quality management.
Submitted by Kim Hag-Yeol on 1/16/97
Under "Control Implications", change 'episodic' in
item #5 to 'local SIP" as per conference call 1/9.
Submitted by Pietarinen Charles on 1/16/97
DR.DAVID WOJICK PE has registered
Interaction of science and technology with policy issues.
Feasibility of attainment.
Plus I cover OTAG for Electricity Daily.
Submitted by WOJICK PE DR.DAVID on 1/9/97
Ozone and Partiulates debate - NISE
NICE "Why Files" on Ozone and Partiulates and the debate that surrounds the new standards. The National Institute for Science Education, NISE, is a co...
Submitted by Poirot Richard on 1/8/97
OTAG Air Quality Analysis Workgroup - January 16, 1997
Report to Policy Group
Submitted by Guinnup David on 1/8/97
Analysis of Ozone, NOy and Tracer Data from a Site in South-Central Pennsylvania
This report examines the behavior of O3, CO, SO2 and NOy at a rural site in south-central Pennsylvania including the covariation of CO and SO2 with NO...
Submitted by Edgerton Eric on 1/6/97
Re: O3 Lifetime from UAM
Robert, hope I am not disrupting this nice dialog you have with Rich & Paul on the interpretation of trajectories with a side question to about the...
Submitted by Husar Rudolf on 1/5/97
Re: Re: Re: Back Trajectories Don't Indicate Origin of Emissions Causing High Ozone
As Rich has suggested in his previous response to the comment, we will be presenting summary plots of average "wind speed" implicit in the time trajec...
Submitted by Wishinski Paul on 1/3/97
Re: Re: Back Trajectories Don't Indicate Origin of Emissions Causing High Ozone
Summary.
Short trajectories mean lower wind speeds near the receptor. This increases the potential for ozone accumulation near the receptor. Low ...
Submitted by Imhoff Robert on 1/3/97
Re: 1hr/8hr Exceedence Pattern
The maps (1hr and 8hr avg) show the number of days/year when the DayMax ozone was >120 or >80 ppb respectively. The averages were were obtained for th...
Submitted by Husar Rudolf on 1/2/97
PA DEP
What maximum is being shown for the 8-hour exceedance maps, is it any day over 84 ppb?
Submitted by Miller Jeffrey on 1/2/97
Re: Back Trajectories Don't Indicate Origin of Emissions Causing High Ozone
Robert Imhoff's preceding comment suggests that the referenced residence-time probability plots provide no information on ozone source regions, and on...
Submitted by Poirot Richard on 12/31/96
Postdoctoral position at CAPITA
A Postdoctoral Position for Air Pollution Transport and Pattern Analysis for 1.5-2 years is open at CAPITA. Research areas include: Further developme...
Submitted by Husar Rudolf on 12/28/96
Upcoming AQA Conference Call, January 8, 1997, 2 PM EST
The Air Quality Analsis Workgroup will hold a conference call on Wednesday, January 8, 1997 at 2:00 p.m. (EST). To participate, please call (703) 736-...
Submitted by Guinnup David on 12/26/96
Senior Meteoologist
Recent work performed by Wishinski, Poirot, Husar, and
Schictel only substantiate and solidify the field data that
has been collected along and ...
Submitted by Michaelsen Clifton on 12/24/96
Back Trajectories Don't Indicate Origin of Emissions Causing High Ozone
Comparing the two plots, it is obvious that the average trajectory length to the 22 stations is much longer for those that start in Canada. Longer tr...
Submitted by Imhoff Robert on 12/17/96
Summary of the OTAG Air Quality Analysis Workgroup
This is a summary of the AQA Workgroup activities that is considered to be of interest to the OTAG Policy Group and the Subgroups. The presentation is given in the form of questions and answers....
Submitted by Husar Rudolf on 12/11/96
Kurt Kebschull has registered
Ozone and pollutant transport,
UAM model verification with ambient data,
CT state implementation plans
Submitted by Kebschull Kurt on 12/10/96
Status Report to OTAG Air Quality Analysis Workgroup: 11/7/96
The current report presents results of "concentration-based trajectory sorting" for 7 Summers (1989-95) for 23 ozone monitoring sites in the OTAG doma...
Submitted by Poirot Richard on 12/9/96
Raymond Evans has registered
Modeling of stationary, mobile and area sources thru-out domain. Emissions trading and allocations.
Policy development.
Submitted by Evans Raymond on 12/8/96
Upcoming AQA Conference call December 9, 1996 1pm (EST)
The Air Quality Analsis Workgroup will hold a conference call on Monday, December 9, 1996 at 1:00 p.m. (EST). To participate, please call (703) 736-7...
Submitted by Guinnup David on 12/4/96
Air Quality Analysis Workgroup December 9, 1996 Conference Call
The Air Quality Analsis Workgroup will hold a conference call on Monday, December 9, 1996 at 1:00 p.m. (EST). To participate, please call (703) 736-7...
Submitted by Anderson Bret on 12/4/96
Re: Comments on Preliminary Proposal: Evaluation of the Effect of the use of a 12
The Southeast modeling center has expended much effort in trying to
determine the cause of the overestimation of peak ozone
concentrations in th...
Submitted by Imhoff Robert on 12/2/96
EPA'S PROPOSAL ON THE PARTICULATE MATTER STANDARD
EPA is proposing revisions to the primary and secondary NAAQS for particulate matter (PM) by adding a new annual PM2.5 standard set at 15 µg/m3 and a ...
Submitted by Husar Rudolf on 12/1/96
EPA'S PROPOSAL ON THE OZONE STANDARD
EPA is proposing revisions of the current 0.12 ppm, 1-hour primary and secondary NAAQS for ozone with a new 8-hour standard set at 0.08 ppm. An area a...
Submitted by Husar Rudolf on 12/1/96
The New Proposed Ozone and PM Standards are Published by EPA
On November 29th, 1996, EPA has relised the proposed new standards for O3 and PM. Wordperfect files can be downloaded from TTN.
Submitted by Husar Rudolf on 11/30/96
Comments on Preliminary Proposal: Evaluation of the Effect of the use of a 12 Kilometer Grid on Otag Modeling Results
One of the primary purposes of model sensitivity runs, such as the one proposed, is to aid in the

evaluation of the model performance. This pr...
Submitted by Schichtel Bret on 11/27/96
Eldewins Haynes has registered
Meteorological and air quality analysis, helping political solutions to scientific problems to be based on scientific data
Submitted by Haynes Eldewins on 11/27/96
Jennifer Seinfeld has registered
Emissions trading and issues related to NOx budget rule allocations
Submitted by Seinfeld Jennifer on 11/26/96
A Comparison of Modeled and Measured Ozone, NOy and CO at Nine Regional Monitoring Stations during the 1995 OTAG Episode
Ozone, NOy and CO concentrations at nine eastern U.S. stations were compared to the UAM-V model output. Measured and modeled O3 and NOy values have s...
Submitted by Hartsell Ben on 11/24/96
Preliminary Proposal: Evaluation of the Effect of a 12 KM Grid on OTAG Modeling Results.
This preliminary proposal is submitted by the TVA for review and comments by the OTAG modeling groups and other interested parties. It should be viewe...
Submitted by Imhoff Robert on 11/23/96
Preparation of Ozone Files for Data Analysis
Ozone related air quality data from seven different data sources were acquired and prepared in a set format for ingestion into the UAM-V model. The...
Submitted by Husar Rudolf on 11/18/96
Summary of Ozone Transport
The purpose of this document is to present the finding and conclusions from studies conducted by the OTAG Air Quality Analysis workgroup which applies...
Submitted by Schichtel Bret on 11/10/96
Ozone Transport Visualization Animations
Animations illustrating the transport of ozone over the course of several days for the summers of 1991, 1993, 1995
Submitted by Schichtel Bret on 11/7/96
RACT Requirements for Major Sources in Attainment Areas
I have heard that there are going to be RACT requirements/recommendations for major sources in attainment areas. I am specifically interested in RACT...
Submitted by Tracy Lee-Ann on 11/7/96
Lee-Ann Tracy has registered
Employed at private consulting firm.
Submitted by Tracy Lee-Ann on 11/7/96
Areas of Violation over the OTAG Region
The Air Quality Analysis workgroup has conducted an evaluation and pattern analysis of areas of violation (1hr and 8hr) over the OTAG region. The a cr...
Submitted by Husar Rudolf on 11/6/96
Ozone/NOy/Tracer Relationships at Three SCION Sites
The purpose of this analysis was to examine the behavior of O3 and other trace gases at three rural sites in the southeast, and to determine whether o...
Submitted by Edgerton Eric on 11/4/96
Re: Re: Usefulness of Midwest-only or Northeast-only sensitivity analyses
Among the important implications of the Rao et al. /Porter et al. statistical decomposition of long-term ozone data is the clear demonstration that a ...
Submitted by Poirot Richard on 11/4/96
Bill Cason has registered
Regulatory analysis
Submitted by Cason Bill on 11/3/96
Michael Messner has registered
statistical data quality assessment and modeling,
decision/policy analysis,
quality assurance and quality control,
impact of measurement erro...
Submitted by Messner Michael on 11/1/96
More on Nov.7 meeting
AQAWG agenda - Nov. 7 - 9:00 am Consensus-building on policy-relevant questions; 11:00 am Consensus-building on summary and recommendatio...
Submitted by Guinnup David on 11/1/96
Re: Usefulness of Midwest-only or Northeast-only sensitivity analyses
I doubt that any of the OTAG modelers are watching this. From the air quality data analysis, it is hard to infer much about regional control effective...
Submitted by Husar Rudolf on 10/29/96
Gregory Stella has registered
Control Technologies & Options;
Trading & Incentives Group;
NOx Cap & Trade Programs;
NOx Control Strategies
Submitted by Stella Gregory on 10/29/96
Usefulness of Midwest-only or Northeast-only sensitivity analyses
Are sensitivity analyses that examine impacts in only portions
of the modeling domain (e.g., the Northeast and Midwest as
opposed to the entire ...
Submitted by Oppenheimer David on 10/28/96
David Oppenheimer has registered
Submitted by Oppenheimer David on 10/28/96
AQA Summary: Ozone Measurement Trend Studies in the Northeast
Purpose: Review and prepare an integrated summary of recent major northeastern U.S. air quality and emission trend analyses.
Submitted by Stoeckenius Till on 10/24/96
AQA Summary: Ozone Exceedances Data Analysis: Representativeness of 1995
Purpose: Assess the representativeness of the 1995 ozone season in the Northeast in the context of the past 15 ozone seasons. The motivation for this ...
Submitted by Stoeckenius Till on 10/24/96
AQA Summary: Ambient Monitoring Sites for OTAG (time series) Model Evaluation
Purpose: Recommend ozone monitoring sites in the Northeast to be used for evaluation of the OTAG base case regional photochemical model simulations fo...
Submitted by Stoeckenius Till on 10/24/96
AQA Summary: Pattern of Ozone Over the OTAG Region
Purpose: Identify spatial patterns and weekday/weekend differences in seasonal average and low, medium, and high ozone concentrations.
Submitted by Stoeckenius Till on 10/24/96
AQA Summary: Source Regions of Influence for High and Low Ozone Conditions in the Eastern US
Purpose: Develop a trajectory based method for investigating the spatial impact of ozone and ozone precursors from selected source areas (the source r...
Submitted by Stoeckenius Till on 10/24/96
AQA Summary: Air Trajectory Analysis of Long-Term Ozone Climatology
Purpose: Perform a back-trajectory based analysis of relationships between high regional ozone levels and transport pathways. Develop trajectory clim...
Submitted by Stoeckenius Till on 10/24/96
AQA Summary: Spectral Decomposition of the Ozone Time Series
Purpose: Estimate the spatial representativeness of data collected at routine ozone monitoring sites and the typical size of airsheds (zones of influe...
Submitted by Stoeckenius Till on 10/24/96
Implementation Strategies and Issues Workgroup: Mission
Mission statement, Rationale and Goals of Workgroup. Goals: (1) Reduce backround ozone; (2) Rely primarly on CAAA mandates; (3) Use cost-effective, ...
Submitted by Schichtel Bret on 10/23/96
Anthony Reynolds has registered
Environmental Impact Modelling (Air) for Industrial Plants
Assessment of Air Pollution Models and Techniques
Submitted by Reynolds Anthony on 10/23/96
Anthony Reynolds has registered
Environmental Impact Modelling (Air) for Industrial Plants
Assessment of Air Pollution Models and techniques
Submitted by Reynolds Anthony on 10/23/96
Dorris Gary has registered
Weighted emissions trading. Integrating the science of ozone formation with economic analysis to determine least cost solutions to ozone attainment.
Submitted by Gary Dorris on 10/22/96
Next OTAG AQA Meeting, Nov. 7-8, Bethesda, MD
The next OTAG Policy Group Meeting is scheduled for Friday, November 8, at the Hyatt Regency Bethesda Hotel in Bethesda, Maryland. The Subgroups will...
Submitted by Guinnup David on 10/18/96
List and Status of AQA Workgroup Technical Analyses
A table of AQA projects. Includes report availability, report access and completion status.
Submitted by Stoeckenius Till on 10/18/96
bob carson has registered
transport of air pollution and
air pollution control strategies
Submitted by carson bob on 10/16/96
Bret Anderson has registered
Implementation Issues-Geographic Applicability of Control Measures
Submitted by Anderson Bret on 10/15/96
Source Regions of Influence for High and Low Ozone Conditions in the Eastern US
Purpose: Develop a trajectory based method for investigating the spatial impact of ozone and ozone precursors from selected source areas (the source ...
Submitted by Stoeckenius Till on 10/14/96
Air Trajectory Analysis of Long-Term Ozone
Purpose: Perform a back-trajectory based analysis of relationships between high regional ozone levels and transport pathways. Develop trajectory clim...
Submitted by Stoeckenius Till on 10/14/96
STAPPA/ALAPCO Home Page
The State and Territorial Air Pollution Program Administrators (STAPPA) and the Association of Local Air Pollution Control Officials (ALAPCO) represen...
Submitted by Husar Rudolf on 10/10/96
Federal, State, and Local Air Pollution Programs and Services.
Links to Federal, State, and Local with air pollution-specific programs and services maintained at EPA Office of Air and Radiation.
Submitted by Husar Rudolf on 10/10/96
Vicky Sullivan has registered
Science/policy interface.
Submitted by Sullivan Vicky on 10/7/96
AQA Conference call October 15, 1pm Eastern time
Items for discussion include 1) Summary report outline, comments on draft 2) Comments on technical summaries 3) Policy-relevant questions, additions...
Submitted by Guinnup David on 10/4/96
Stephen Mueller has registered
Manage TVA OTAG modeling-related projects. Evaluated UAM-V
performance against observations.
Submitted by Mueller Stephen on 10/1/96