1. Fundamentals Of Stack Gas Dispersion OF STACK GAS DISPERSION written and published by Milton R. Beychok, is the most comprehensive book ever written on air dispersion modeling and calculations. http://www.air-dispersion.com/

< For Best Viewing, Use Your Maximum Window Size at a Resolution of 800 by 600 >>> About Purchasing Book Reviews More Reviews Contents Site Map Book Cover (click to enlarge) "Fundamentals Of Stack Gas Dispersion" ( The most comprehensive book available on air pollution dispersion calculations) The third edition of the book on dispersion modeling of continuous, buoyant air pollution plumes which takes nothing for granted. Every equation is completely derived step-by-step without any complicated or advanced mathematics. Every constraint and assumption is fully explained. The subjects covered in the book include atmospheric turbulence and stability classes, buoyant plume rise, Gaussian dispersion calculations and modeling, time-averaged concentrations, wind velocity profiles, fumigations, trapped plumes, flare stack plumes and much more ... with a great many example calculations. Copies of the book have been purchased in the U.S.A., Canada, Mexico, South America, Europe, Australia, Africa and Asia (in a total of 56 countries), and are available in over 125 libraries worldwide. James Westbrook, Certified Consulting Meteorologist, USA:

2. Conversions And Formulas For Best Viewing, Use Your Maximum Window Size at a Resolution of 800 by 600 air dispersion modeling Conversions and Formulas. http://www.air-dispersion.com/formulas.html

Home About Purchasing Book Reviews Contents Site Map Air Dispersion Modeling Conversions and Formulas Click in table below on desired item: Converting mg/m to ppmv Converting ... Concentration Units (ppm, mg/m Converting Atmospheric Pollutant Concentrations : from mg/m to ppmv The conversion factor depends on the temperature at which you want the conversion (usually about 20 to 25 degrees Centigrade). At an ambient pressure of 1 atmosphere, the general equation is: ppmv = (mg/m where: ppmv mg/m MW ppm by volume (i.e., volume of gaseous pollutant per 10 volumes of ambient air) milligrams of gaseous pollutant per cubic meter of ambient air molecular weight of the gaseous pollutant ambient air temperature in degrees Centigrade As an example, for gaseous pollutant NOx, convert 20 mg/m ppmv = (20)(273.15 + 25) / (12.187)(46.01) = 10.6 where: 46.01 = molecular weight of NO (i.e., NOx expressed as nitrogen dioxide) NOTES: (2) 1 percent by volume = 10,000 ppmv (i.e., parts per million by volume). (3) For all practical purposes, degrees Centigrade and degrees Celsius are synonymous.

3. Air Dispersion, Air Dispersion Modeling, Air Dispersion Models, Air Dispersion S Software solutions for air dispersion modeling, traffic pollution models modeling air pollution software - air dispersion modeling - air dispersion software - air dispersion model http://www.air-dispersion-model.com/

New CALRoads Traffic Air Dispersion Model! We feature ISC AERMOD View (ISCST3, ISC-PRIME and AERMOD), CalRoads View (CALINE4, CAL3QHC, CAL3QHCR), RMP View, Screen View (SCREEN3), SLAB View and SLAB3D View. Air Dispersion Modeling Inc. is a part of Scientific Software Group . In addition to air pollution software, we offer a full line of other environmental software. Please see our home web site at www.scientificsoftwaregroup.com for our complete line of groundwater, surface water, geotechnical, and other environmental modeling software products. Air Dispersion Modeling Inc. offers complete solutions for air pollution modeling - air pollution software - air dispersion modeling - air dispersion software - air dispersion model - air dispersion modelling - air dispersion modeling software - air dispersion modelling software. Air Dispersion Modeling Inc., A Division of Scientific Software Group

4. Reference On Lagrangian Particle & Trajectory Modeling A comprehensive list of literature references on Lagrangian air dispersion modeling, compiled by Dr. Marek Uliasz. http://www.frii.com/~uliasz/modeling/ref/lpd_bib.htm

REFERENCES ON LAGRANGIAN PARTICLE AND TRAJECTORY MODELING by Marek Uliasz D Atmos. Environ. D Atmos. Environ. R J. Air Waste Manage. Assoc. R Atmos. Environ. J Atmos. Environ. B Boundary-Layer Meteor. B Boundary-Layer Meteor. G Atmos. Environ. G 19th International Technical Meeting on Air Pollution Modelling and Its Application , pages 447-454, Ierapetra, Crete, Greece, 29 September - 4 October 1991. NATO/CCMS. G Atmos. Environ. D J. Geophys. Res. D J. Geophys. Res. D Atmos. Environ. J Atmos. Environ. G J. Atmos. Sci. P Boundary-Layer Meteor. A Quart. J. Roy. Meteor. Soc. S J. Appl. Meteor. S Atmos. Environ. R J. Climate Appl. Meteor. R J. Appl. Meteor. S Atmos. Environ. S Boundary-Layer Meteor. J J. Appl. Meteor. W J. Appl. Meteor. D Atmos. Environ. J J. Geophys. Res. J Atmos. Environ. J J. Appl. Meteor. B Atmos. Environ. T J. Appl. Meteor. T Boundary-Layer Meteor. D Atmos. Environ. A J. Comput. Phys. K Atmos. Environ. P S 4th Int. Conf. Environmental Quality and Ecosystem Stability , Jerusalem, Israel, June 4-8 1989. P J. Climate Appl. Meteor. C Quart. J. Roy. Meteor. Soc.

5. Air Dispersion Modeling Error Propagation in air dispersion modeling. Milton R. Beychok, Consulting Engineer, Newport Beach, California. air dispersion modeling has been evolving since before the 1930s. http://www.chemalliance.org/Columns/Industry/Ind990816.asp

Back to Feature Articles List Error Propagation in Air Dispersion Modeling Milton R. Beychok, Consulting Engineer, Newport Beach, California Air dispersion modeling has been evolving since before the 1930s. Over the last 15-25 years, strict environmental regulations and the availability of personal computers have fueled an immense growth in the use of mathematical models to predict the dispersion of air pollution plumes. Beychok's recently published book, " Fundamentals Of Stack Gas Dispersion ", details the evolution of the widely used Gaussian air dispersion models and their inherent assumptions and constraints. Unfortunately, many users of such models are completely unaware of those assumptions and constraints and mistakenly believe that the precision achievable with computers equates to accuracy. This article discusses how the propagation of seemingly small errors in the Gaussian model parameters can cause very large variations in the model's predictions. In most dispersion models, determining the pollutant concentrations at ground-level receptors beneath an elevated, buoyant plume of dispersing pollutant-containing gas involves two major steps:

6. Air Dispersion Modeling Sullivan Environmental Consulting, INC. performs air dispersion modeling / analysis air dispersion modeling. Conducting the Accident Analyses Via Dispersion Modeling for Risk Management Plans Required http://www.sullivan-environmental.com/serv06.htm

Air Dispersion Modeling C ond ucting the Accident Analyses Via Dispersion Modeling for Risk Management Plans Required by EPA - Sullivan Environmental performed accident analysis modeling for a mining operation, several drinking water and waste-water facilities within a township, and modeling of chemical manufacturing facilities. T he analyses were done using the RiskManPro model developed by Sullivan Environmental that produces the emission estimates, source characteristics (including source temperature), and resulted in the modeling of outdoor air quality and expected ranges in indoor air quality at selected locations around each facility. In most cases, the analysis involved hypothetical accident scenarios for pressurized tanks, such as for liquid chlorine, ammonia, etc. D ispersion Modeling Experts for Development of State Implementation Plan for particulate (PM10 ) impacts in Allegheny Coutny, Pennsylvania (Pittsburgh) - Sullivan Environmental was retained by Allegheny County, Pennsylvania as air quality experts to assist their staff in the preparation of a State Implementation Plan (SIP) to control particulate emissions from coke oven operations. The industrial facility that was a key component of this SIP was located in complex terrain, with maximum impacts occurring on a nearby hillside. Support provided by Sullivan Environmental included conducted field studies on meteorological conditions in the region, the expansion of meteorological monitoring capability along the valley floor, and the development of software to integrate two EPA dispersion models in order to properly account for the substantial lift of the plumes from coke oven operations. The SIP was approved by EPA based on the model-based analysis conducted by the County.

7. Error Propagation In Air Dispersion Modeling This online technical article provides a sensitivity study of the Gaussian dispersion modeling of continuous, buoyant pollution plumes which illustrates how seemingly minor changes in some of the key variables can result in a propagated overprediction factor ranging from 6 to 80. The same website has five more online technical articles. http://www.air-dispersion.com/feature.html

Home About Purchasing Book Reviews Contents Site Map ERROR PROPAGATION IN AIR DISPERSION MODELING Milton R. Beychok, Consulting Engineer Newport Beach, California, USA Air dispersion modeling has been evolving since before the 1930s. Over the last 15-25 years, strict environmental regulations and the availability of personal computers have fueled an immense growth in the use of mathematical models to predict the dispersion of air pollution plumes. Beychok's recently published book, " Fundamentals Of Stack Gas Dispersion ", details the evolution of the widely used Gaussian air dispersion models and their inherent assumptions and constraints. Unfortunately, many users of such models are completely unaware of those assumptions and constraints and mistakenly believe that the precision achievable with computers equates to accuracy. This article discusses how the propagation of seemingly small errors in the Gaussian model parameters can cause very large variations in the model's predictions. In most dispersion models, determining the pollutant concentrations at ground-level receptors beneath an elevated, buoyant plume of dispersing pollutant-containing gas involves two major steps:

8. Air Dispersion Modeling Inc. - Air Pollution groundwater model, groundwater modelling, groundwater software air dispersion, air dispersion modeling, air dispersion models, air dispersion software, air http://www.air-dispersion-model.com/adm/index.php?cPath=25

9. Lakes Environmental - Risk Assessment And Air Dispersion Modeling Software Powerful air dispersion modeling and risk assessment software. ISC, AERMOD, ISCPRIME, human health, ecological, emergency release and more. http://www.weblakes.com/

HOME PRODUCTS TRAINING SUPPORT ... STORE SEARCH PRODUCTS AUSTAL View CALPUFF View CALRoads View ... SLAB View DOWNLOADS WRPLOT View Percent View RMP Wizard US EPA Models ... Lakes Demos TRAINING Upcoming Courses RESOURCES Air Toxics Index Digital Terrain Data Mercury Meteorological Data ... Hot Links LAKES INFO Project Experience News Archive How To Order Distributors ... Contact Us CALPUFF View removes complexity and boosts productivity of any CALPUFF air dispersion modeling project. Learn More About CALPUFF View! Discover why this powerful air dispersion software is the choice of today's leading companies. AERMOD-PRIME Details Learn why no other package comes close. Click Here for More 3D! Implementing the latest in ecological risk guidance, EcoRisk View removes the complexity of performing ecological risk assessments. Since its introduction, IRAP-h View has quickly become the human health risk assessment tool of choice for government and industry. News U.K. Met Office Endorses ISC-AERMOD View

10. Lakes Environmental - Air Dispersion Modeling Workshop AERMOD ISC air dispersion modeling WORKSHOP with Risk Assessment Air Modeling. AERMOD ISC air dispersion modeling WORKSHOP with Risk Assessment Air Modeling. http://www.weblakes.com/Courses/courseUSFeb2004.html

HOME PRODUCTS TRAINING SUPPORT ... STORE SEARCH PRODUCTS AUSTAL View CALPUFF View CALRoads View ... SLAB View DOWNLOADS WRPLOT View Percent View RMP Wizard US EPA Models ... Lakes Demos TRAINING Upcoming Courses RESOURCES Air Toxics Index Digital Terrain Data Mercury Meteorological Data ... Hot Links LAKES INFO Project Experience News Archive How To Order Distributors ... Contact Us with Risk Assessment Air Modeling February 26-27/2004 - Houston, Texas Course Outline Introduction of objectives in air dispersion models Data requirements: meteorology, field, and terrain Dispersion factors, Gaussian Plume equations Planetary Boundary Layer Theory and Turbulence Parameterization Terrain data processing - AERMAP Hands-on case studies using ISC-AERMOD View TM Objective This course is intended for air quality professionals working, or planning to work, in the assessment of air pollution impact. At the end of the course the attendee should be able to understand the basics of regulatory air dispersion modeling and to use screening and refined models for permit applications and risk assessment. Students will work on case studies using ISC-AERMOD View. Who Should Attend Air quality professionals in environmental consulting companies, government agencies, and other corporate environmental engineers involved, or planning to be involved, in the prediction of the impact caused by sources of air pollution.

11. BlueScape Environmental - Practice Areas: Air Dispersion Modeling Air Permitting. Air Permit Feasibility. air dispersion modeling. Health Risk Exposure Assessment. Air Quality Litigation Support. Air Emissions Inventories. Environmental Impact Reports http://bluescapeinc.com/practice/area3.html

formerly Westbrook Environmental, Inc. (WEI) Air Permitting Air Permit Feasibility Air Dispersion Modeling Air Quality Compliance Support ... :: Contact Sample Projects Project 1 Project 2 Project 3 Project 4 What are my facility's air quality impacts? Air dispersion models are tools to assess impacts from air pollution sources. Why are these tools important? Air permit applicants must show that potential air quality impacts will not exceed specific health thresholds. If used before pollution sources are actually built, air dispersion models can be more advantageous than air monitoring. What makes BlueScape stand out? We have extensive experience using air dispersion modeling tools preferred by USEPA, state and local agencies for air quality impact evaluation. We understand how to properly apply the models and recommend technical refinements to reduce calculated impacts. We have solid working relationships with various agency staff that review dispersion modeling studies. We use high-quality software and graphical tools such as ARCVIEW to provide clear, accurate visual representation of air quality impacts. BlueScape will help you present a detailed, technical explanation of your project's air quality impacts to regulatory agencies and the public.

12. Air Dispersion Modeling .comwww.msdsworld.comair dispersion modeling. Introduction. air dispersion modeling is used by http://www.lehder.com/factsheets/Air Dispersion Modelling.pdf

13. Lakes Environmental - Risk Assessment And Air Dispersion Modeling Software Powerful air dispersion modeling and risk assessment software. ISC, AERMOD, ISCPRIME, human health, ecological, emergency release and more. and boosts productivity of any. CALPUFF air dispersion. modeling project. View package has been selected to meet the air dispersion modeling needs for all of 39 regions in China http://www.lakes-environmental.com/

HOME PRODUCTS TRAINING SUPPORT ... STORE SEARCH PRODUCTS AUSTAL View CALPUFF View CALRoads View ... SLAB View DOWNLOADS WRPLOT View Percent View RMP Wizard US EPA Models ... Lakes Demos TRAINING Upcoming Courses RESOURCES Air Toxics Index Digital Terrain Data Mercury Meteorological Data ... Hot Links LAKES INFO Project Experience News Archive How To Order Distributors ... Contact Us CALPUFF View removes complexity and boosts productivity of any CALPUFF air dispersion modeling project. Learn More About CALPUFF View! Discover why this powerful air dispersion software is the choice of today's leading companies. AERMOD-PRIME Details Learn why no other package comes close. Click Here for More 3D! Implementing the latest in ecological risk guidance, EcoRisk View removes the complexity of performing ecological risk assessments. Since its introduction, IRAP-h View has quickly become the human health risk assessment tool of choice for government and industry. News U.K. Met Office Endorses ISC-AERMOD View

14. Air Dispersion Modeling Software air dispersion modeling software such as ISC PRIME, AERMOD, ISCST3, SCREEN3 and SLAB Order air dispersion modeling software by mail/fax Prices for air dispersion modeling software include USPS First Class/UPS shipping and handling charges http://www.air-dispersion-model.com/html/offlineorderform.html

Order air dispersion modeling software by mail/fax Ordering in the U.S. and Canada Prices for air dispersion modeling software include USPS First Class/UPS shipping and handling charges. For Federal Express, add $25 for the first item and $10 for each additional one. Please provide your street address. Ordering in Countries Outside the U.S. and Canada Prices for air dispersion modeling software include USPS/First Class shipping. For Federal Express, add $30 for the first item and $10 for each additional one. Please provide your street address. Payment Payment must be by check in U.S. funds drawn on an American bank located in the U.S., International Money Order, VISA/Mastercard/American Express, or Wire Deposit to Zions First National Bank, Sandy, Utah, US, Phone: 801-524-4644, Routing #124000054, Account # 019020296. Prepayment is required for all International orders with the exception of Government Agencies and Universities. Fill in the information below. Print it and fax to (801) 302-1160. Call (801) 208-3011 with any questions. Customer Information Company Name Contact Name User Name Telephone Fax Email Street Address Street Address City State/Province Zip/Postal Code Country Product Information Qty Name of Product Price Total Express Shipping GRAND TOTAL Purchase order is enclosed.

15. Indiana Department Of Environmental Management air dispersion modeling. The Indiana Department of Environmental Management s Office of Air Quality (IDEM OAQ) requires air dispersion http://www.in.gov/idem/air/programs/modeling/

Air Dispersion Modeling The Indiana Department of Environmental Management's Office of Air Quality (IDEM OAQ) requires air dispersion modeling to be conducted to demonstrate that a source will not cause or significantly contribute to the violation of air quality standards. Modeling also must comply with the Prevention of Significant Deterioration (PSD) increments, or toxic thresholds. IDEM follows all air quality modeling procedures set forth in the U.S. Environmental Protection Agency (EPA) Guideline on Air Quality Models for PSD, nonattainment New Source Review (NSR), and State Implimentation Plan (SIP) revisions. Title Description IDEM Air Quality Modeling Policies This document, updated in October 2001, contains Air Quality Modeling Policies, including links to EPA Guidance. Meteorological Data Map of the state with links to download specific meteorological data. National Ambient Air Quality Standards (NAAQS)Inventory [Excel] 1335KB Statewide inventory of NAAQS sources for refined modeling. PSD Inventory Statewide inventory for refined modeling.

16. Air Dispersion, Fire, And Explosion Modeling Software; Terrain And Meteorologica Online BREEZE Demo, Register today for a free online demo and see why BREEZE is the leading desktop productivity tool for air dispersion modeling analysis. http://www.breeze-software.com/

About BREEZE Training BREEZE ... SEARCH WHAT IS BREEZE Environmental professionals worldwide use Trinity Consultants’ BREEZE software to evaluate air pollution impacts and instantly analyze air quality issues. These Windows -based applications include a fully integrated family of air dispersion and accidental release modeling software along with HEXDAM, VEXDAM, and VASDIP, software that evaluates damage caused to structures as a result of primary and secondary explosions. All BREEZE applications allow users to increase productivity, visualize data, and run easy-to-read reports quickly and easily. As an accepted Microsoft Certified Solution Provider (MCSP), clients can be assured that the software products we develop are compatible with new Microsoft operating systems and applications. BREEZE Air BREEZE Haz Modeling Data Register today for a free online demo and see why BREEZE is the leading desktop productivity tool for air dispersion modeling analysis. New BREEZE Bulletin U.K. AERMOD Training ... 2003 Model-Ready Meteorological Data BREEZE USERS email: password: Login Forgot your password?

17. Air Dispersion Modeling Computer Laboratory Course Details Mr. Meister is proficient in various regulatory air dispersion modeling systems and is involved in the implementation of AERMOD in the state of Texas. http://www.breeze-software.com/BrzCourseDetails.asp?y=2004&C=5&CN=Air Dispersion

18. Air Dispersion Modeling - SoftWright LLC air dispersion modeling. SoftWright Many of the air dispersion modeling software programs require the input of terrain data. For http://www.softwright.com/adm.html

Air Dispersion Modeling SoftWright is pleased to assist you in providing topographic elevation data that can be supplied to popular air dispersion modeling software. Typically, a study in a region is first done by identifying a specific location and evaluating out to a distance of approximately 50 km from that location with receptor grid spacing at a course setting such as 1000 meters. When the impact area has been located, the study is rerun in a smaller area with the receptor grid spacing tightened up to more accurately display the level of contamination in the impact area. This type of iterative process is repeated over smaller geographic areas and with tighter receptor grid spacing until contaminant levels are ascertained. In addition to software necessary to do this modeling, generally two other things are required if terrain data is necessary for your model. First of all you must acquire DEMs for the geographic region where you need to perform the study. These can be supplied in several resolutions and numerous file formats . Many of the air dispersion modeling software packages do not read the DEMs directly, but rely on an intermediate software package to create an ASCII data file containing the actual input information for the air dispersion modeling software. These files typically contain details calculated from input provided by you about the area for your study and receptor spacing.

19. Air Dispersion Modeling air dispersion modeling. What is air dispersion modeling? An air dispersion air. Why must an industry perform air dispersion modeling? Air dispersion http://www.scdhec.net/eqc/baq/html/factsheets/modeling.html

Air Dispersion Modeling What is air dispersion modeling? An air dispersion model is a set of mathematical equations that relates the release of air pollutants from emission sources to the corresponding concentration of pollutants in the ambient air. Why must an industry perform air dispersion modeling? Air dispersion modeling is one of the methods that may be used to show compliance with South Carolina Air Pollution Control Regulation 62.5, Standards no. 2, 3.1, 7, and 8. The Prevention of Significant Deterioration (PSD) regulations require major new construction to demonstrate that they will not cause a violation of the National Ambient Air Quality Standard (NAAQS). 40 CFR Section 51.110(k)(2) requires individual states to determine at least every 5 years if their State Implementation Plan (SIP) is adequate to meet the NAAQS in all areas of the state. In terms of the permitting process, which facilities are required to submit air dispersion modeling? Most construction permits, including Prevention of Significant Deterioration (PSD) construction permits.

20. Air Dispersion Modeling - Minnesota Pollution Control Agency MPCA Home Air air dispersion modeling. air dispersion modeling. PDF Document MPCA Guidance for Title V and PSD air dispersion modeling (January 2004); http://www.pca.state.mn.us/air/modeling.html

Home Site Index Glossary What's New ... Visitor Center Related Pages: Air This Web site contains PDF documents that require Adobe Acrobat for viewing. MPCA Home Air Air Dispersion Modeling Air quality dispersion modeling is a computer simulation that predicts air quality concentrations from various types of emission sources. For pollutants emitted through a stack, it considers the emission rate, stack height, stack diameter, and stack gas temperature and velocity, as well as the effect of nearby buildings and terrain. Other emission sources like vehicle traffic or wind erosion from storage piles are represented as 2-dimensional area sources or 3-dimensional volume sources. DISPERSE Program Modeling Guidance Meteorological Data PSD Minor Source Baseline Dates ... Additional Resources Air quality dispersion models use meteorological data such as temperature, wind direction, and wind speed to calculate concentrations. Five years of National Weather Service meteorological data is typically used for air quality modeling required by the US Environmental Protection Agency (EPA), Federal Land Managers (FLMs), and Minnesota Pollution Control Agency (MPCA). In some cases one year of onsite meteorological data is used. Model results are often compared to benchmark levels such as ambient standards to determine if they meet state and federal requirements. Sometimes results are used to help site ambient monitors or they may be input into health risk assessments or ecological risk assessments.

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