21. Conversions And Formulas This online technical article provides a number of useful unit conversions and formulas pertaining to air dispersion modeling. The same website includes four more online technical articles. 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 ... Used In Emission Limits 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.

22. Traffic Air Dispersion Modeling Software,traffic Dispersion, Vehicle Pollutants, ....... CDROM drive (for installation. CALRoads View - traffic air dispersion modeling software.CALRoads View Categories air pollution model. CALRoads View http://www.scisoftware.com/products/calroadsview_description/calroadsview_descri

CALRoads View Features Some of the features you will find in CALRoads View include: Model Comparison Chart Contouring Capabilities Extensive Receptor Options Integrated Site Map Support ... System Requirements CALINE4, CAL3QHC, CAL3QHCR Comparison Some of the features that CALRoads View offers with respect to the 3 main mobile source dispersion models are: Feature Carbon Monoxide (CO) Particulate Matter (PM) Nitrogen Dioxide (NO2) Other Inert Gases Averaging Period 1 hr / 8 hr 30-60 min 30-60 min 1 Hour of ETS* Data 1 Week of ETS* Data Meteorology Analyzes Multiple Wind Directions Analyzes Various Sets of Met Conditions Ability to Specify Range of Dates 1 Year of ISCST3 Hourly Met Data Roadway Types (Links) At Grade Depressed Fill Bridge Parking Lots Intersections / Queue Links Street Canyon and Bluff Continuous and/or Single Links Converts Groups to Single Links Receptors Unlimited Number of Receptors Unlimited Number of Grids Active/Inactive Receptors Import/Export Receptors Output Results Output in Meters or Feet True Color Shaded Contouring Worst Wind Direction Plots * ETS - Emissions Traffic and Signalization Contouring Capabilities Advanced contouring tools are part of the CALRoads View package. There is no need to purchase an additional software package to produce professional, customized contoured results of your modeling. Below are just a a few of the features you will find in the integrated contouring tools.

23. S.C. DHEC - BAQ - Air Dispersion Modeling Air Quality Data and Dispersion Modeling. Ambient Air Quality Data Summaries. AirDispersion Modeling Consultants Listing, 11/21/2002 (PDF64 KB). http://www.scdhec.net/eqc/baq/html/modeling.html

BAQ Menu 112(r) Accidental Releases Asbestos Contacts Early Action Plan ... What's New SCDHEC Bureau of Air Quality 2600 Bull Street Columbia, SC 29201 If you have any questions or comments about the information found on this page please contact AirQuestions@dhec.sc.gov Air Quality Data and Dispersion Modeling Ambient Air Quality Data Summaries Ambient Air Quality Data Summary for 1998 (Excel - 71 KB) Ambient Air Quality Data Summary for 1999 (Excel - 71 KB) Ambient Air Quality Data Summary for 2000 (Excel - 73 KB) Ambient Air Quality Data Summary for 2001 (Excel - 75 KB) ... Ambient Air Quality Monitoring Data, [In BAQ Annual Report] (PDF-2,000KB) (Data is located in the appendix on pages 40-45) Guidance Documents Air Quality Modeling Guidelines, 7/1/01 (PDF-403KB)

24. Air Dispersion Modeling Back to Feature Articles List. Error Propagation in air dispersion modeling. Airdispersion modeling has been evolving since before the 1930s. http://www.chemalliance.org/Columns/Industry/Ind990816.asp

25. Air Dispersion Modeling Team air dispersion modeling Team, New Source Review Air Permits has information for permits,amendments, renewals and exemptions. TNRCC air dispersion modeling Team. http://www.tceq.state.tx.us/permitting/airperm/nsr_permits/admt/admthome.htm

26. Air Dispersion Modeling - SoftWright LLC air dispersion modeling. SoftWright Many of the air dispersion modelingsoftware 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.

27. Lakes Environmental - Air Dispersion Modeling Workshop AERMOD ISC air dispersion modeling WORKSHOP with Risk Assessment andEnvironmental Justice. DAY 1 ISC AERMOD air dispersion modeling http://www.weblakes.com/Courses/courseUSFeb2003.html

HOME PRODUCTS TRAINING SUPPORT ... STORE SEARCH PRODUCTS EcoRisk View IRAP-h View ISC-AERMOD View ... SEVEX 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 and Environmental Justice 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 Environmental Justice - Methodologies and Applications 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.

28. 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/courseUSApr2003.html

HOME PRODUCTS TRAINING SUPPORT ... STORE SEARCH PRODUCTS EcoRisk View IRAP-h View ISC-AERMOD View ... SEVEX 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 April 14-15 / 2003 - Irvine, California 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.

29. Literature References On Mesoscale Meteorology A comprehensive list of literature references on mesoscale meteorology compiled by Dr. Ming Xue, many of which relate to various aspects of air dispersion modeling. http://twister.ou.edu/References.all.html

Aagaard, K. and E. C. Carmack, 1989: The role of sea ice and other fresh water in the Arctic circulation. J. Geophys. Res. Aagaard, K., E. Fahrbach, J. Meincke, and J. H. Swift, 1991: Saline outflow from the Arctic Ocean: Its contribution to the deep waters of the Greenland, Norwegian, and Iceland seas. J. Geophys. Res. Aagaard, K., J. H. Swift, and E. C. Carmack, 1985: Thermohaline circulation in the Arctic mediterranean seas. J. Geophys. Res. Abakumova, G. M. and and, 1994: Estimation of the effect of Pinatubo on solar radiation and transmittance of the atmosphere on the base of ground measurements (in Russian summary in English). Fizika atmosfery i okeana Abakumova, G. M. and Y. V. Yarkho, 1992: Variations of aerosol optical thickness of the atmosphere in Moscow during the last 37 years (in Russian, summary in English). Meteor. i Gidrol. Abarbanel, H. D. I., D. D. Holm, J. E. Marsden, and T. Ratiu, 1984: Richardson number criterion for the nonlinear stability of three-dimensional stratified flow. Phys. Rev. Lett.

30. Indiana Department Of Environmental Management air dispersion modeling The Indiana Department of Environmental Management'sOffice 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.

31. MULTIPLAN Press Release 1 Based in the Abu Dhabi, United Arab Emirates and with an office in RueilMalmaison,France, this firm's services include health, safety and environmental (HSE)training courses either online or onsite. Courses are available in air dispersion modeling, HAZOP's, quantitative risk assessment, and environmental management. http://www.multiplan.co.ae/pr01.htm

TYPICAL LIST OF HSE COURSES Safety Integrity Level (SIL) Dynamic Simulation Dispersion Modeling Training Environmental Management Training Safety Integrity Level ( SIL) —$2300 - Understand the fundamental science behind Risk basis design - ALARP Demonstration - Identify regulatory requirements for IEC 61508 - Learn about modeling study design Dynamic Simulation and application for HSE training program —$2800 - Understand the fundamental science behind dynamic simulation. - Advance process control - Application of Dynamic Simulation for HAZOP studies. - Application of Dynamic simulation for determination of scenario of the risk. Quantitative Risk Assessment (QRA)—$650 The objective of this course is to give plant managers, safety supervisors, and engineers a practical understanding of the methodologies that may be used to identify, quantify, and evaluate the risks of their operations involving hazardous materials. Attendance of HAZOP course is recommended. Developing an Effective Emergency Response Program—$450 Multiplan and Associates will provide a thorough introduction for developing and implementing an effective emergency response program. Issues to be covered include:

32. Air Dispersion Modeling Software And Training For AerMod, ISCST3 BEELine Software is the leader in air dispersion modeling software and training,including AerMod, ISCST3 and CalPuff. air dispersion modeling http://beeline-software.com/MainHome.html

33. Air Dispersion Modeling Sullivan Environmental Consulting, INC. performs air dispersion modeling/ analysis. air dispersion modeling. Conducting the Accident 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.

34. BREEZE Scientific Software And Data Services - Air Dispersion Modeling Software BREEZE markets the software developed by Trinity Consultants of Dallas, Texas, USA. They offer air Category Science Environment air dispersion modeling Software......Why is BREEZE AERMOD/ISC GIS Pro considered the most innovative dispersion modelingplatform in BREEZE Users Articles; My Software; User Notes; Air Issues Review. http://www.breeze-software.com/

Home Support About Us Maintenance Users Why is BREEZE AERMOD/ISC GIS Pro considered the most innovative dispersion modeling platform in the market today? BREEZE is the the leading desktop productivity suite that streamlines model setup and analysis to enhance your organization's performance. BREEZE ISC / AERMOD GIS Pro Articles My Software User Notes Air Issues Review Vist us at the Visit us at the et2003 Exhibition Attend Trinity's Air Dispersion Modeling Courses More Events... News BREEZE AERMOD/ISC v4.0 Now Available!! View Presentation BREEZE Wins DoD Contract to Develop Modeling Analysis Command Center What did you say? ... More News... New! WorldGeoData.com Download Geophysical Data (Meteorological and Terrain) Trinity Consultants, Inc Phone: 919-549-0499; Fax: 919-549-0273 Email: breeze@trinityconsultants.com

35. Air Primer An air quality and acoustic consulting firm (based in Plaistow, New Hampshire, USA) whose services include air dispersion modeling. http://airandnoise.com/AirPrimer.html

About Us Air Primer Contact Us Today’s Business and Air Quality - Managing Economic Growth and Environmental Protection Pollutants and Standards The U.S. Environmental Protection Agency (EPA) has set forth standards for a set of pollutants that it refers to as the criteria pollutants. These standards are referred to as the National Ambient Air Quality Standards (NAAQS) and were promulgated to protect human health and welfare with an adequate margin of safety. The criteria pollutants include: • Carbon Monoxide (CO) • Nitrogen Dioxide (NO2) • Ozone (O3) • Lead • Particulate Matter less than 10 microns aerodynamic diameter (PM10) • Particulate Matter less than 2.5 microns aerodynamic diameter (PM2.5) • Sulfur Dioxide (SO2) For more information about the National Ambient Air Quality Standards (NAAQS): NAAQS Table Geographic areas where air quality complies with the NAAQS are referred to as Attainment Areas. There are many areas across the country where air quality does not comply with the NAAQS for one or more of the criteria pollutants. These regions are called Nonattainment Areas. For more information about the Nonattainment Areas in New England: Nonattainment Areas in New England Air Quality Regulations and Permitting Air Quality Impact Modeling For many facilities, a critical step in the permitting process is the air quality modeling analysis. These types of analyses use computer models to assess the potential impact of a facility on air quality. These models, which were developed by the EPA, use a complex set of data inputs to predict a conservatively estimated air quality impact for the facility of interest. Inputs to these models include information about the facility itself, representative meteorological data, and the topography of the area surrounding the facility. Using this information, these models predict the expected concentration of the pollutants associated with the operation of the facility in question. Modeled pollutant concentrations are then compared with the NAAQS and/or applicable toxic air pollutant standards.

36. Air Dispersion Modeling Tools air dispersion modeling Tools Stone Lions Environmental Corporation is currentlydeveloping software to aid in the evaluation of air dispersion modeling results http://www.stonelions.com/software.htm

Air Dispersion Modeling Tools Stone Lions Environmental Corporation is currently developing software to aid in the evaluation of air dispersion modeling results. A software program that allows the user to quickly compare the results of two Industrial Source Complex (ISC) model runs is due to be released early in 1997. Given two different ISC concentration tables, this program quickly calculates the difference in concentration (or deposition) at each receptor and gives the user both a table of differences and a graphic display which can be superimposed on a basemap. This program will be a valuable tool for anyone who wishes to evaluate differences in modeling results due to changes in source parameters, emission rates, meteorology, etc. For more information please e-mail to mgruber@stonelions.com or call Mark Gruber at (310) 377-6677. Return to Stone Lions Environmental Corporation Home Page.

37. Computer Animation Of Air Dispersion Modeling Computer Animation of air dispersion modeling. Stone Lions EnvironmentalCorporation is in the process of developing software that http://www.stonelions.com/animate.htm

Computer Animation of Air Dispersion Modeling Stone Lions Environmental Corporation is in the process of developing software that allows the user to produce a computer animation of an air pollution situation based on the results of air dispersion modeling. The animation will depict quantitative results. Both 2-dimensional and 3-dimensional animations are possible. To view a sample animation, click on the thumbnail image below. To download the full FLC file (3DMOVIE.ZIP - 3.9 Mb) of the 3-D animation, click here . This animation requires Autodesk's Animator Player to play. To download the full AVI file (2DMOVIE.ZIP - 0.3 Mb) of the 2-D animation, click here To download the full FLC file (LANDFILL.ZIP - 1.5 Mb) of the landfill animation, click here . This animation requires Autodesk's Animator Player to play. For more information, please e-mail to mgruber@stonelions.com or call Mark Gruber at (310) 377-6677. Return to Stone Lions Environmental Corporation Home Page.

38. Stakeholders Air Dispersion Modeling And Ammonia Emission Project Research. Livestock Systems. Stakeholders air dispersion modelingand Ammonia Emission Project. Kevin Janni, Professor Larry Jacobson http://www.bae.umn.edu/annrpt/2000/research/livestock9.html

2000 Annual Report Home Teaching Research Extension/ ... Research Livestock Systems Stakeholders Air Dispersion Modeling and Ammonia Emission Project Kevin Janni , Professor Larry Jacobson, Professor David Schmidt, Assistant Extension Engineer Susan Wood, Research Fellow Verlyn Johnson, Electrical-Mechanical Systems Specialist Dawn Kerns, Junior Scientist Funding Source Minnesota Department of Agriculture Objective The objectives of this project are to: 1. Evaluate three air dispersion models for predicting near field transport of hydrogen sulfide and odor from livestock and poultry buildings by comparing model results with field measurements, and 2. Measure ammonia emissions from typical swine, dairy, and poultry facilities in cold and spring weather. Project Description Air dispersion models are being used to recommend set back distances for livestock and poultry facilities. Additional data is needed to improve model results. Hydrogen sulfide and odor emissions will be measured from three animal facilities. This data will be used as inputs to three air dispersion models to calculate downwind concentrations and odor intensities. MDA Single Point Monitors and trained field sniffers will be used to collect data to compare with air dispersion model results. Ammonia emissions from livestock and poultry facilities are gaining attention because of the potential impact these emissions have on the environment. European researchers have documented a wide range of ammonia emission rates from different types of buildings in different geographic locations. Little ammonia emission data is available for livestock and poultry facilities in the United States. For this project, ammonia emissions from three livestock and poultry buildings will be measured continuously for a two-week period in winter and early summer 2001 using a Chemiluminescence Ambient Ammonia Analyzer (Thermo Environmental Instruments Inc.). Building ventilation rates will be determined by using a carbon dioxide balance method.

39. Bison Engineering, Inc. - Air Services An environmental engineering firm headquartered in Helena, Montana, USA, whose services include air dispersion modeling; air emission inventories, air permit applications, and risk management plans (RMPs). http://www.bison-eng.com/air.html

Our Company Our Philosophy Our Personnel Locations ... Back to Top Air Services Choose an Air Service... Bison's 20 years of experience in air quality permitting and regulatory analysis range from preparation of air permit applications for industrial facilities to extensive compliance assurance follow-up for many clients. Our experience allows us to design an approach to air regulatory issues to meet your needs in a cost-effective manner. The following paragraphs further explain some of our expertise in key air quality regulatory areas: PSD/NSR/State Permit Applications Compliance Tracking Database Title V Operating Permit Applications/Negotiations Air Toxics ... Monitoring Plans PSD/NSR/State Permit Applications One of the first critical steps in planning for a new or expanded industrial facility is assuring the necessary pre-construction permits are obtained. Bison helps clients apply for and receive appropriate air quality permits for their facilities. Bison is particularly skilled at advising our clients of the appropriate permitting path to follow and the most timely strategy to obtain a permit. We prepare permit applications ranging from a few pages to several hundred pages. Our permitting clients include power generation, chemical manufacturing, petroleum refining, wood products, lime manufacturing, and cement plants.

40. Stakeholders Air Dispersion Modeling And Ammonia Emission Project Research. Stakeholders air dispersion modeling and Ammonia EmissionProject. Kevin Janni, Professor and Head Larry Jacobson, Professor http://www.bae.umn.edu/annrpt/2001/research/livestock12.htm

var images=6; var index=rand(images); document.write(""); 2001 Annual Report Home Resources Teaching Research ... Grants Research Stakeholders Air Dispersion Modeling and Ammonia Emission Project Kevin Janni , Professor and Head Larry Jacobson, Professor David Schmidt, Assistant Extension Engineer Susan Wood, Research Fellow Verlyn Johnson, Information Technology Professional Dawn Mason, Junior Scientist Funding Source Minnesota Department of Agriculture Objective The objectives of this project are to: Evaluate three air dispersion models for predicting near field transport of hydrogen sulfide and odor from livestock and poultry buildings by comparing model results with field measurements, and Measure ammonia emissions from typical swine, dairy, and poultry facilities in cold and spring weather. Project Description Air dispersion models are being used to recommend set-back distances for livestock and poultry facilities. Additional data is needed to improve model results. In this project hydrogen sulfide and odor emissions were measured from three animal facilities. Measurements of downwind concentrations of hydrogen sulfide were made using MDA Single Point Monitors. Downwind odor measurements were conducted using trained field sniffers. The results of the downwind measurements will be compared to the emission measurements and modeling results.

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

Page 2     21-40 of 178    Back | 1  | 2  | 3  | 4  | 5  | 6  | 7  | 8  | 9  | Next 20