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Volume 7 - Issue 08 |
Monthly Newsletter
- August 2006 |
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News & Events
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WRPLOT View and Percent View Version 5.3 Released!
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Lakes Environmental is proud to release Version 5.3 of WRPLOT
View and Percent View. Download your free copy
today!
Download
WRPLOT View - Version 5.3 - Freeware
Download
Percent View - Version 5.3 - Freeware
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WESTAR Council to Receive Training from Lakes Environmental |
Lakes Environmental has been selected
by WESTAR (Western States Air Resources Council) to train their
air quality agency
staff. The AERMOD and CALPUFF training courses will be held
in Honolulu, Hawaii
and will take place from August 28 to September 1, 2006.
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Farewell to ISC/AERMOD Course Instructor - Mr. Roger
Brode! |
We, at Lakes Environmental,
have been honored to have Mr. Roger Brode as a course instructor for
our Air
Dispersion Modeling Workshops for the past 7 years. Unfortunately,
as of August 2006, he will no longer be able to participate
in these courses as he is leaving MACTEC to re-join EPA
after an absence of 17 years.
Mr. Roger Brode is a meteorologist
with 22 years of experience in air pollution meteorology
and dispersion modeling. Mr. Brode developed the SCREEN
model and has been the lead programmer for the ISCST3
and AERMOD models.
The air modeling community will greatly benefit
by the more active participation of Mr. Brode at the
US EPA. We wish him all the best in his future endeavors. |
Lakes Environmental Closed on Labor Day |
Lakes Environmental will be closed on
Monday, September 4th, 2006 to observe the Labor Day holiday.
If you have any pressing
needs during that time, please email us at support@weblakes.com and
we will contact you September 5th, 2006 when we re-open.
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Upcoming Courses
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We’ve set a number of training dates for 2006,
with additional courses to be announced. Please contact us
at training@weblakes.com for
international or customized training inquiries.
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Courses Filling up!
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Our Denver AERMOD Course is
filling up - register now to book your spot!
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AERMOD Courses
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Sep. 14-15, 2006 |
Montreal, QC |
Outline |
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Sep. 21-22, 2006 |
Denver, Colorado |
Outline |
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Oct. 9-10, 2006 |
Melbourne, Australia |
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Oct. 12-13, 2006 |
Boston, Massachusetts |
Outline |
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Nov. 6-7, 2006 |
Barcelona, Spain |
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Nov. 16-17, 2006 |
Orlando, Florida |
Outline |
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CALPUFF Courses
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Oct. 11-13, 2006 |
Melbourne, Australia |
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Nov. 8-10, 2006 |
Barcelona, Spain |
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For more information on these courses, such as registration
information and course outlines, please visit our website: https://www.weblakes.com/courses.html.
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Customized Courses
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Lakes Environmental offers a variety of on-site, customized
courses for all of your air dispersion modeling needs. For
information on pricing and availability, please email us
at training@weblakes.com.
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Monthly Modeling Tip
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Odor Modeling Tip – Part 2 |
In last month's modeling tip we discussed the emission rate and
modeled output concentration, when modeling both single and
multiple odor producing pollutants. In this tip we will discuss further
how
the correct units can be achieved in AERMOD and ISCST3, as
well as how shorter term averaging periods can be calculated for
odor concentrations.
Setting Correct Units in AERMOD and ISCST3
As discussed in the last modeling tip, for a single pollutant, the emission
rate can be given in grams per second [g/s] and the output concentration
in micrograms per cubic meter [µg/m3]. These are the default values
for AERMOD and ISCST3, and hence no changes are needed.
For multiple pollutants, the emission rate is given in terms of odor units
per second [OU/s] and the output concentration is given as odor units per
cubic meter [OU/m3]. This requires several parameters in AERMOD and ISCST3
to be changed. These parameters can be found in the source pathway, and
should be changed as follows:
Parameter |
Default Value |
User-Defined Value |
Unit Factor |
1000000 |
1 |
Emission Unit Label |
GRAMS/SEC |
OU/SEC |
Concentration Unit Label |
MICROGRAMS/M3 |
OU/M3 |
This may be written in the source pathway as:
CONCUNIT 1 OU/SEC OU/M3
ISC-AERMOD View Users: These
changes can be made directly in the Source Pathway under Emission
Output Unit .
Calculating Short-Term Odor Concentrations
Because the nose can detect odors very quickly, an averaging period
less than 1-hour is more appropriate (e.g., 3-min or 10-min). Therefore,
you will need to convert the 1-hour AERMOD and ISCST3 concentration results
into the appropriate shorter average period using the formula below:
Cnew = C1-hour (T1-hour/Tnew)q
Cnew |
= |
Concentration for the shorter time period |
C1-hour |
= |
1-hour concentration |
Tnew |
= |
Shorter average period in seconds |
T1-hour |
= |
3600 (for 1-hour average period) |
q |
= |
factor (values for q vary, please contact your regulator for guidance) |
ISC-AERMOD View Users: This
conversion is available in the Concentration Converter under the Tools menu.
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Don’t Forget: Submit Your Modeling Tips Now!
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We are currently accepting submissions for the Monthly Modeling Tip which
appears in our newsletters. If you have a modeling tip that may
benefit a variety of people, please send it to us at support@weblakes.com.
Your name and the name of your organization will appear below the
tip providing you with greater exposure.
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News From Our Partners
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ArguSoft - Germany, Austria and Switzerland
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Odor Modeling with AUSTAL2000
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In 2002, the Lagrangian particle model, AUSTAL2000
was introduced in Germany as the air dispersion model for regulatory
purposes. In the
fall of 2004 a special code was implemented in the AUSTAL2000
model for handling odor dispersion modeling. The odor model is seamlessly
integrated
into the AUSTAL2000 model and carries the name AUSTAL2000G (G
is the first character of the German word "Geruch" i.e. Odor).
The research report documenting the development of AUSTAL2000G is available
in the German official website under the name bzu-005-01.pdf (available
in German language only).
The AUSTAL2000G model accounts for the specific odor perception function
of the human nose in regard of the time domain. The model comprises of
a peak/mean approach (default of 4) known from other dispersion models.
This default factor can be changed by the user. An area averaging step
is applied before evaluation.
The default unit for odor emissions is MOU/h = million odor units per
hour. Odor emissions can be determined from olfactometric measurements
according to VDI-guideline or from literature references.
The calculation process simulates what German guidelines call odor
hours.
An odor hour is an hour in which odor nuisance at the receptor point occurs
during at least 10 % in the corresponding hour. Summing up all these odor-hours
gives the frequency of occurrence of “odor hours”.
The frequency of occurrence of “odor hours” within a year
is then compared to given limit values (see table below). The nuisance
is irrelevant if less than 2% (0.02) of all hours in a year are odor-hours
caused by the installation under consideration. The limit values listed
are valid for the total odor load, i.e. of all installations acting on
the receptor point. An initial level has to be derived by extended model
calculations or testing by a panel team.
Odor Threshold Limit Values for Different Land Uses
(German Regulations)
Residential
and
Mixed Area
[odor hours/year]
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Industrial
and Commercial Areas
[odor hours/year]
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Frequency |
Relative
Frequency |
Frequency |
Relative
Frequency |
0.10 |
10% |
0.15 |
15 % |
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This Month's Articles
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California Leads on Warming
Tony Blair, the British prime minister, who worries
about global warming more than any other world leader,
has finally found an important American ally: Governor
Arnold Schwarzenegger of California.
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Seeking a Balance in Ontario’s Energy Equation
Electricity demand in Ontario peaked last week at
an all-time high of over 27,005 Megawatts, prompting
calls for greater energy conservation. In the short
term not much is likely to change, and the province
will continue to rely on imported power to get through
the high heat and humidity of the summer. Increased
energy efficiency standards and incentives for renewable
energy are some of the longer term measures being considered
to establish more of a balance between the province’s
energy demand and consumption.
Read
Article
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In Warmer World, Even Inuit Buy Air Conditioners
OSLO — With signs that the world is warming,
even Inuit peoples of the far north are ordering air
conditioning.
Read
Article
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Review: 'An Inconvenient Truth"
Along with various Seattle business and community
leaders, city planners and politicians, a large group
of scientists from the University of Washington got
a chance to preview the film, An Inconvenient Truth,
from Al Gore.
Read
Article
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Pigeons Beam Air Quality Info to Blog
Pigeons with backpacks and cell phones will be taking
to the sky and sending air quality data to a blog as
part of a whimsical project that blends science, art
and activism.
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Toronto Joins Cities Climate Initiative
Toronto has joined 21 other global cities in an effort
to fight global warming and reduce greenhouse gas emissions,
as part of a project sponsored by former US President
Bill Clinton’s Foundation. The initiative is
a partnership between the Large Cities Climate Leadership
Group, which is led by London Mayor Ken Livingstone,
and the Clinton Foundation.
Read
Article
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Big CO2 emissions from U.S. Passenger
Cars
Today’s choices will have an
impact for years to come. In 2004, personal vehicles
in the U.S. emitted
314 million tons of CO2, equal to the amount of carbon
in a coal train that is 55,000 miles long.
Read
Article
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Conferences & Tradeshows
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Here are a few Conferences and Tradeshows coming up in the next few months: |
Aug 21-23, 2006 |
2006 Midwestern States Risk Assessment
Symposium
more
info |
Indianapolis, Indiana, USA |
Aug 21-25, 2006 |
Dioxin2006 - 26th International Symposium
on Halogenated Persistent Organic Pollutants
more
info |
Oslo, Norway |
Sept 4-5, 2006 |
Environment Ireland 2006 Conference
more
info |
Dublin, Ireland |
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Sept 5-7, 2006 |
2006 – POWER-GEN Asia 2006
more
info |
Hong Kong |
Sept 18-19, 2006 |
2006 Global CO2 Cap-and-Trade Forum
more
info |
Washington, DC, USA |
Oct 3-5, 2006 |
Emerging Issues in Air Quality Modeling
for Canada
more
info |
Calgary, Alberta Canada |
Oct 16-19, 2006 |
Solar Power 2006
more
info |
San José, CA, USA |
Oct 27-30, 2006 |
Eco Expo Asia
more
info |
Hong Kong |
October 30-Nov 1, 2006 |
A&WMA’s Chemicals, Health,
and the Environment
more
info |
Ottawa, Ontario |
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About This Newsletter
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This newsletter contains
information gleaned from various sources on the web, with complete
links to the sources cited. Organizations cited are in no way
affiliated with Lakes Environmental Software.
Lakes Environmental Software is a leading environmental IT
company which offers a complete line of air dispersion modeling, risk assessment,
emissions inventory, and emergency release software as well as training
and custom software services. With satisfied users located around
the globe, Lakes Environmental Software will continue to revolutionize
the environmental software field.
For more information please visit our website at: www.WebLakes.com. You
may also contact us by phone at (519) 746-5995 or by fax at (519) 746-0793.
All comments and suggestions are welcome. You can e-mail the editor
at: newsletter@weblakes.com |
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