| Directory > Science > Environment > Air Quality > Air Dispersion Modeling > Consultants Hednderson Paddon & Associates, Ltd.
A consulting engineering firm (headquartered in Owen Sound, Ontario, Canada) whose environmental
services include air pollution dispersion modeling.
http://www.hp.on.ca/air%20qual.htm
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Arup
A worldwide engineering firm (with home office in London, England) whose environmental services
include air dispersion studies using the AERMOD and UK-ADMS models.
http://www.arup.com/environment/Page.cfm?rowid=16
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Source Environmental Science
An environmental consulting firm, located in Houston, Texas, USA, whose air quality services
include: air pollution dispersion modeling, air emission inventories, and air permitting.
http://www.source-environmental.com/source.htm
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ODOTECH
A firm of odor-related consultants (located in Montreal, Canada) whose services include air
pollution dispersion modeling.
http://www.odotech.qc.ca/polair/pdfpolair.html
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FaberMaunsell
FaberMaunsell is an international, multi-disciplinary consultancy (located in St. Albans, Herts,
UK) whose environmental services include air dispersion modeling.
http://www.fabermaunsell.com/expertise/skilldetails.asp?skill=AQM
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Odour Monitoring Ireland
Odour abatement specialists located in Trim, County Meath, Ireland whose services include air and
odour dispersion modelling using ISCST3, AERMOD, ADMS3.1 and Calpuff.
http://www.odourireland.com
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Kinectrics
A consulting firm based in Toronto, Canada who offers air dispersion modeling in support of their
electric power generation services.
http://www.kinectrics.com/en/serviceline/AirQualityModelling.html
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Jacques Whitford
A multi-national engineering firm (headquartered in Dartmouth, Nova Scotia, Canada) who offers air
dispersion modeling in support of their environmental, geotechnical and risk management services.
http://www.jacqueswhitford.com/airquality4.shtml
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Enviros
An environmental consulting firm with multiple offices in the UK as well as other countries. Their
air quality services include air dispersion modeling, emissions monitoring, and regulatory
compliance audits.
http://www.enviros.com
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Vision Environmental, Inc.
Environmental consultants based in Massachusetts and Michigan in the USA. Their services include
the use of air dispersion modeling for risk assessments, air permitting, air toxics evaluations,
and New Source Reviews.
http://www.visionenvironmental.com/main.html
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JBR Environmental Consultants
A regional consulting firm, headquartered in Sandy, Utah, USA and with other offices in the states
of Nevada and Idaho, whose services include: air pollutant dispersion modeling, emission
inventories, air permitting, and risk management.
http://www.jbr-env.com/services/air_quality.html
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Air Consulting and Engineering Solutions (ACES)
Environmental engineering consultants located in Houston, Texas, USA whose services include air
permitting, air pollution control, Clean Air Act compliance, and air dispersion modeling.
http://www.aces-llc.com/
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ABS Consulting Inc.
An international firm (headquartered in Houston, Texas, USA) providing engineering, and
technological services for analyzing and managing hazards, risk, and safety as well as minimizing
environmental impacts. Their air dispersion models, offered from their office in Bethesda,
Maryland are for routine and accidental airborne releases. Versions available are: quick-running
plume model, urban dispersion model and inside building model.
http://www.absconsulting.com/midas/advantage.html
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EXSIM
Shell Oil and Tel-Tek offer consulting studies involving the EXSIM mathematical model that predicts
the overpressure (explosion) generated by the accidental release and ignition of a gas cloud in a
congested area of an industrial plant onshore, or offshore on oil drilling platforms. The model
was developed by Shell Oil Global Solutions in England and by the Telemark Technological R&D
Center (Tel-Tek) in Norway.
http://www.exsim-consultants.com/
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Applied Research Associates
A consulting engineering firm headquartered in Albuquerque, New Mexico, USA (with multiple offices
in the USA and Canada) whose air quality services include air dispersion modeling.
http://www.ara.com/air_quality_dispersion_modeling.htm
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Atlantic Environmental Technologies, Inc.
An environmental engineering and sciences company, based in Sandwich, Massachusetts, USA, whose air
quality services include dispersion modeling.
http://www.atlanticcompanies.com/ade/air.html
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Resource & Environmental Consultants Ltd. (REC)
Environmental consultancy headquartered in Reading, England (with other offices in the UK) whose
services include air dispersion modeling.
http://www.recltd.demon.co.uk/airqual.htm
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Slovnaft VURP
An applied research institute located in Bratislavia, Slovak Republic whose services include air
dispersion modeling using the CFD program called Fluidyn-PANACHE.
http://www.vurup.sk/products/proc3/english.html
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ARIANET s.r.l.
Air quality consultants located in Milan, Italy whose services include applied meteorology and air
pollution dispersion modeling.
http://www.aria-net.it/eng/theme_4.htm
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DMK Environmental Engineering Inc.
Cosulting environmental engineers located in Holladay, Utah, USA whose air quality services include
air dispersion modeling.
http://www.dmkenvironmental.com/?page=services
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CTEH
The Center for Toxicology and Environmental Health is a consulting firm based in Little Rock,
Arkansas, USA whose environamental services in include air dispersion modeling using the SAFER
dispersion model.
http://www.cteh.com/services/chemical/
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O'Connor Associates
An engineering and consulting company headquartered in Calgary, Alberta, Canada (with multiple
offices across Canada) whose air quality services include air dispersion modeling.
http://www.oconnor-associates.com/services/air-subpage.htm
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Consultants on Air Resources Management
A firm based in Hungary that provides atmospheric environmental impact assessments for Central
Europe based on local meteorological data and relevant models.
http://www.levegokornyezet.hu
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Epsilon Associates
An environmental engineering company based in Maynard, Massachusetts, USA whose services include
air dispersion modeling for: risk management studies, offsite consequence analyses, and air
emissions permitting.
http://www.epsilonassociates.com/specialties/air_quality.shtm
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TRC Environmental Corporation
Environmental engineers and consultants, based in Windsor, Connecticut, USA with multiple offices
nationwide as well as offices in South America. Air dispersion modeling is used for air permitting
and for evaluating: impact of accidental releases, compliance with ambient air quality standards,
optional air pollution control systems, and impacts of toxic air pollutant emissions.
http://www.trcsolutions.com/corporate/services/environmental/eaam_overview.asp
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EnviroMet
An air quality consulting firm located in Cherry Hill, New Jersey, USA, whose services include air
permitting, air dispersion modeling, emissions estimation, site evaluations, regulatory analysis,
and human health and ecological risk assessments.
http://www.enviromet.net/capabilities.shtml
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Enstec Services
Environmental consultants, headquartered in Cambridge, England, whose services include numerical
air dispersion modeling as well as wind tunnel modeling
http://www.netcomuk.co.uk/~ss_ens/enstec.html#Dispersion
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DMK Environmental Engineering Inc.
An environmental consulting firm (located in Holladay, Utah, USA) whose services include air
quality regulatory work, dispersion modeling, and emission inventories.
http://www.dmkenvironmental.com/?page=soq#dm
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Zimmermann Environmental, Inc.
Environmental firm (located in Austin, Texas, USA) that provides air dispersion modeling services,
air pollution meteorological data analyses, and expert witness testimony.
http://www.keith.zimmermann.com/
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Associated Environmental Engineers Pvt. Ltd.
An environmental engineering firm based in Gujarat, India, whose consulting services include air
pollutant dispersal modeling.
http://www.aeepl.com/environmental.htm
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Steigers Corporation
An environmental consulting firm (located in Littleton, Colorado, USA) whose services include air
dispersion modeling.
http://www.steigers.com/
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Environmental Engineering Solutions, P.C.
Environmental Engineering Solutions is an environmental engineering consulting firm, based in
Westchester, New York, USA, whose services include air dispersion modeling.
http://www.eespc.com/
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Environmental Engineering Studies, Inc.
An environmental engineering firm (located in Carlsbad, California, USA) whose consulting services
include air dispersion modeling studies.
http://www.envengstudies.com/air_quality.htm
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Conversion Technology Inc.
A firm of environmental, health and safety consultants based in Norcross, Georgia, USA whose
services include air dispersion modeling, air permitting and compliance, and air toxics
assessments.
http://www.conversiontechnology.com/aq.html
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Air & Noise Compliance
An air quality and acoustic consulting firm (based in Plaistow, New Hampshire, USA) whose services
include air dispersion modeling.
http://airandnoise.com/AirPrimer.html
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Brenk Systemplanung GmbH
An environmental engineering and consulting firm based in Aachen, Germany whose services include
air dispersion modeling.
http://www.brenk.com/system/main.htm
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Serene Environmental Services
An environmental consulting company (based in Vashi, Navi Mumbai, India) whose services include air
dispersion modeling.
http://www.serenenviro.com/pro_ass.htm
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El Dorado Engineering
A consulting and design firm (located in Salt Lake City, Utah, USA) whose services include air
dispersion modeling.
http://www.eldoradoengineering.com/enviro2.html
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AlphaTRAC Inc.
A consulting firm located in Westminster, Colorado, USA that offers atmospheric dispersion modeling
including dense gases, hazardous releases and complex terrain.
http://www.alphatrac.com/
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Primatech, Inc.
A consulting firm based in Columbus, Ohio, USA and with multiple offices in North America. Their
services include: process hazard analyses; source term calculations; air dispersion and consequence
modeling; and probability modeling. They also market proprietary software for process hazard
analysis (PHA) and safety management (PSM).
http://www.primatech.com/consulting/services/dispersion_and_consequence_modeling.htm
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Atmospheric and Environmental Research (AER)
A nation-wide consultant firm, headquartered in Cambridge, Massachusetts, USA, whose air quality
modeling services include model development, applications, customization and testing. Models
developed and used by AER encompass such air quality issues as photochemical smog formation,
particulate matter levels, atmospheric visibility degradation and acid deposition.
http://www.aer.com/services/regulatoryComp.html
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Hamon-Custodis
Engineering firm (headquartered in Somerville, New Jersey, USA)that designs, constructs and
maintains industrial chimneys and smokestacks. Their engineering services include air dispersion
modeling. The firm is part of the Hamon Group (headquartered in Brussels, Belgium) with offices
worldwide.
http://www.hamon.com/site/presence/local_home.asp?ID1=8&ID2=22&ID3=2
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Stephen Lamming Associates
An environmental testing and consulting firm (headquartered in Burlington, Ontario, Canada) whose
services include air dispersion modeling.
http://www.sla-env.ca/dispersionmodelling.htm
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Murray & Trettel Inc.
A firm of certified consulting meteorologists (located in Northfield, Illinois) whose environmental
services include air dispersion modeling.
http://www.weathercommand.com/DispersionModeling.htm
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Windtech Consultants
A firm of consulting engineers (based in Arncliffe, NSW, Australia) whose services include air
pollution dispersion studies by physical modeling in a wind tunnel.
http://windtech.com.au/atmospheric_pollution.html
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O'Brien and Gere
A firm of environmental consultants and engineers with corporate headquarters in Syracuse, New York
and other offices nation-wide in the USA as well as Canada and the UK. Their services include air
permitting, air regulation assistance and air dispersion modeling.
http://www.obg.com/environmental/
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E & E, Inc.
Environment and Ecology, Inc. is an environmental consulting and engineering company headquartered
in Lancaster, NY with other offices nation-wide in the USA. Their services include air permitting,
compliance studies, impact assessments and air dispersion modeling.
http://www.ene.com/services/clean_air.asp
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Earthguard Environmental Group Inc.
Earthguard Environmental is a consulting firm (based in Richmond Hill, Ontario, Canada) that
provides services for development, evaluation and application of air dispersion models using EPA
and other regulatory models as well as specialized models designed for specific applications.
http://www.earthguard.ca
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NatSteel Enviro Tech
Based in Singapore, NatSteel Enviro Tech comprises four divisions: steel mill services, industrial
wastes, wastewater treatment, and air quality. The air quality division offers air pollution
dispersion modeling services.
http://www.natsteelenvirotech.com.sg/airquality.htm
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Preston Engineering
An environmental consulting firm headquartered in Davenport, Iowa, USA, whose services include air
pollution dispersion modeling.
http://www.prestonengineering.com/services/air.htm
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Church and Trought
An environmental engineering firm based in Toronto, Ontario, Canada whose services include air
dispersion modeling. The dispersion models used include the Ontario Ministry of Environment
Regulation 346 model as well as the USA EPA models ISC3 and AERMOD.
http://www.churchandtrought.com/services.asp?ID=11
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GexCon AS
A consulting group in Norway that uses a CFD program called FLACS to model the dispersion of leaks
(on offshore oil drilling platforms) as well as their subsequent ignition and explosion. Far field
blast effects (up to two kilometers away) from such explosions can also be modeled. GexCon both
sell FLACS and perform consultancy services using FLACS.
http://www.gexcon.com
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Affinity Consultants
Environmental consultants based in Canal Fulton, Ohio, USA, whose air services include dispersion
modeling.
http://www.affinityconsultants.com/services.php
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Trigon Engineering Consultants
Environmental consultants based in Greensboro, North Carolina, USA, whose services include air
dispersion modeling.
http://www.trigoneng.com/AirServices/airqual2.htm
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Westbrook Environmental Inc.
Located in San Diego, California, the environmental services offered by this firm include air
dispersion modeling, offsite consequence analyses, air permitting, toxic emission evaluations and
risk assessments. Models used include: ISCST3, CALPUFF, SCREEN3, CALINE4, AERMOD, VISCREEN, PLUVUE,
CTSCREEN, SHORTZ, and BPIP.
http://www.wei-air.com/practice/area3.html
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Air Quality Services
Based in Evansville, Indiana, USA, with additional offices in the states of Tennessee and Florida,
the Air Quality Services firm offers consulting services including air dispersion modeling, ambient
air monitoring, air permitting and emission inventories.
http://www.aqsllc.net/modeling.htm
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Aspen Environmental Group
An environmental consulting company based in Agoura Hills, California, USA whose services include
air dispersion modeling and air quality impact assessments, air permitting, air toxics studies, and
risk assessments.
http://www.aspeneg.com
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YSA Atmospheric Modeling
Yamada Science & Art Corporation (YSA), located in Santa Fe, New Mexico, USA, specializes in
computer modeling of atmospheric airflows and the dispersion of airborne materials over complex
terrain. YSA developed, markets, and provides user support for the three-dimensional atmospheric
models HOTMAC and RAPTAD.
http://ysasoft.com/index.htm
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Regulatory Compliance Partners
A consulting firm (based in Baton Rouge, Louisiana, USA and Houston, Texas, USA) whose services
include air dispersion modeling, risk management plans and emergency response plans.
http://www.your-rcp.com/specialties/chemhazard.shtml
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HDR Engineering
An engineering and consulting firm headquartered in Omaha, Nebraska, USA (with 60 offices
nationwide) whose services include air dispersion modeling, air permitting, risk analyses, and
environmental compliance studies.
http://www.hdrinc.com/engineering/erm/IndusFacility/AirQuality.htm
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E&A Environmental Consultants
A consulting firm, headquartered in Stoughton, Massachusetts, USA with other offices in the states
of North Carolina and Washington, that utilizes air dispersion modeling as part of their services
in odor abatement.
http://members.aol.com/eaenviron/models.html
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EngConsult:
A consulting firm based in Brampton, Ontario, Canada (with an office in Dhaka, Bangladesh) whose
services include air dispersion modeling.
http://www.eng-consult.com/ECservice-AirQuality.htm
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Rogers and Callcott
An environmental consulting firm (located in Greenville, South Carolina, USA) whose services
include air dispersion modeling, air permitting and air toxics evaluations.
http://www.rogersandcallcott.com/environmental.htm
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Transoft International
A multinational company, based in St. Denis, France, offering technology solutions and consulting
services in the field of computational fluid dynamics including air dispersion modeling for
environmental impact studies, accidental releases, and risk assessments.
http://www.fluidyn.com
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Anvil Corporation
Engineering and design company headquartered in Bellingham, Washington, USA with other offices in
the states of Washington, Montana and Alaska. Services include air dispersion modeling in support
of air permitting, BACT and T-BACT analyses, and compliance studies.
http://www.anvilcorp.com/pdf/air3.PDF
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General Physics Corporation
Based in Columbia, Maryland, USA (with other offices in Canada, South America, Europe and Asia),
General Physics is a firm of scientists, technologists and engineers whose air emissions management
services include air dispersion modeling in support of air emissions compliance studies, offsite
consequence analyses, and evaluation/selection of emission stack heights.
http://www.gpworldwide.com/pdf/envir/envir_air_emission_mgmt.pdf
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Conestoga_Rovers & Associates
An engineering, construction and environmental consulting firm based in Nottingham, England with 40
offices in Europe and North America. Their services include air pollution dispersion modeling in
support of environmental impact studies as well as response planning for accidental releases.
http://www.cra.co.uk/pdf/8%20air%20quality.pdf
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PPM Consultants Inc.
Environmental consultants based in the south and southeastern United States (Louisiana, Alabama,
Mississippi and Florida) whose services include air dispersion modeling, air permitting, risk
management plans, and emission inventories.
http://www.ppmco.com/main.php?page=services
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Trinity Consultants
A consulting firm based in Dallas, Texas, USA whose services include consulting, software, and
training in the fields of air quality, dispersion modeling, permitting, compliance, Clean Air Act,
environmental management information systems and industrial risk.
http://www.trinityconsultants.com/services.asp?CatID=3&SubCatID=15&SvID=14
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Omni Environmental Associates
An environmental consulting firm based in Research Triangle Park, North Carolina, USA whose air
quality services include air permitting, compliance studies and air dispersion modeling.
http://www.environmentalengineers.com/serviceair.html
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S.M. Stoller Corporation
An environmental consulting firm headquartered in Lafayette, Colorado, USA with other offices in
Idaho, New Mexico and Texas. Their services include risk assessments and air pollution dispersion
modeling.
http://www.stoller.com/air_dispersion.htm
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D'Appolonia S.p.A.
Engineering consultants and designers based in Genoa, Italy whose services include risk assessment
studies and industrial air pollution dispersion modeling.
http://www.dappolonia.it/e/1/air_qual.htm
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RPS Group Plc
An environmental consultancy based in England, with multiple offices in the UK, Ireland and Europe.
Their Planning, Transport and Environmental division provides services in: dispersion modeling of
industrial stack emissions, air emission impact studies, and emission authorization applications.
http://www.rpsplc.co.uk/planning/topic_sheets/environment/air_quality.asp
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ENSCO, Inc.
Consulting engineers and scientists based in Springfield, Virginia and Melbourne, Florida with
other nationwide offices on the USA. Atmospheric science services include air pollution dispersion
modeling and developing customized dispersion models.
http://www.ensco.com/products/atmospheric/
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Woodard and Curran
A multi-office environmental consulting firm headquartered in Portland, Maine, USA whose services
include air dispersion modeling, air permitting and compliance, air toxics studies and risk
management plans.
http://www.woodardcurran.com/aoe_Info/SectorID/2/AOEID/1
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The Chambers Group
An environmental consulting firm based in Irvine, California, USA whose range of services includes
atmospheric dispersion modeling for: air toxics assessments, air permitting, compliance studies,
and consequence analyses of accidental releases.
http://www.chambersgroupinc.com/air_quality_management_services.htm
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Fluent, Inc.
Headquartered in Lebanon, New Hampshire, USA with other offices nationwide and worldwide, this firm
specializes in computational fluid dynamics (CFD) modeling. Their many services include
atmospheric plume dispersion modeling.
http://www.fluent.com/solutions/environmental/env2.htm
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Keramida Environmental, Inc.
An environmental consulting firm based in Indianapolis, Indiana, USA whose air quality services
include: emission inventories, air permitting, risk management plans, and air pollution dispersion
modeling.
http://www.keramida.com/
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Air Noise Environment Pty. Ltd.
Environmental consultancy based in Brisbane, Australia specializing in stack emission testing and
air dispersion modeling using AUSPLUME, CAL/AUSPUFF, ISC3, TAPM and AERMOD with particular emphasis
on air dispersion from tunnels.
http://www.ane.com.au
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Stanley Environmental, Inc.
An environmental consulting firm based in Coraville, Iowa, USA and a subsidiary of the Stanley
Group. Their services include air permitting, risk management plans, emission inventories and air
dispersion modeling.
http://www.stanleygroup.com/sei/html/airquality.html
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PCR Services
An environmental consulting firm based in Southern California, USA, whose services include air
dispersion modeling, stationary source permitting, and emission inventories, allotments, and
mitigations.
http://www.pcrnet.com/divisions/quals_air.htm
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Compliance Partners, Inc.
An environmental consulting firm headquartered in Littleton, Colorado, USA (with other offices in
Oklahoma and Wyoming) whose services include permitting, dispersion modeling, and developing and
implementing compliance programs for the natural gas industry.
http://www.compliance-partners.com
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NRG
A nuclear research, engineering and consultancy group with offices in Petten and Arnheim in the
Netherlands. Their services include environmental and dose assessments of radionuclides using
dispersion modeling in air, water and soil.
http://www.nrg-nl.com/product/re/dispersion/index.html
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Harding ESE
Headquartered in Golden, Colorado, USA, Harding ESE is a subsidiary of Mactec, Inc. (which has
offices nationwide) and their dispersion modeling services include screening or refined analysis
for point, area, or industrial sources in flat or complex terrain for use in air permitting and
compliance, air toxics studies and assessing accidental release impacts.
http://www.mactec.com/News/fs/Air%20Quality.pdf
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MWH Global, Inc.
An international environmental consulting, engineering and construction company with headquarters
in Broomfield, Colorado, USA that is a merger of Montgomery Watson with Harza Engineering. Their
services include air dispersion modeling, air permitting and compliance, odor evaluation and
control, risk assessments and management, and emission inventories.
http://www.mwhglobal.com/air_quality.asp
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Vipac Engineers and Scientists
A company headquartered in Melbourne, Australia whose consulting services include air pollution
dispersion modeling using models such as AUSPLUME, CALINE 4, MAXCON, RTDM and AIRPLAN.
http://www.vipac.com.au/infrastructure/index.asp?page=pollution&page=index
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Argent Consulting Services
An environmental engineering and consulting firm headquartered in Houston, Texas, USA and offering
services in air dispersion modeling, air permitting and compliance, and risk management plans.
http://www.argentinc.com/html/air.html
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Environmental Risk Limited
An environmental consulting and engineering firm (located in Bloomfield, Connecticut, USA) whose
air quality services include air emissions dispersion modeling, accidental release modeling, and
cooling tower impact modeling.
http://www.erl.com/services_consulting.htm
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Innovative Emergency Management, Inc.
A risk management company based in Baton Rouge, Louisiana, USA and offering software and consulting
services nationwide. Included in their software offerings is D2-Puff, an air dispersion model
developed specifically to predict the path and extent of plume resulting from the accidental
release of hazardous chemicals.
http://www.ieminc.com/Products_and_Services/Project_descriptions/puff.htm
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Liase Environmental, Inc.
A consulting firm based in Dallas, Texas, USA offering air quality permitting and related
environmental services including air dispersion modeling.
http://www.liaise.org/airquality.html
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ATMET
Environmental and meteorological consultants located in Boulder, Colorado, USA whose services
include air pollution dispersion modeling, emergency response modeling, long range transport, and
applied atmospheric research.
http://atmet.com/html/about.shtml
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Weiss Associates
An environmental engineering, science and management firm headquartered in Emeryville, California,
USA whose air quality services include air dispersion modeling.
http://www.weiss.com/services/brochure/air-prog.html
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Aromatrix Pte Ltd
An odour control/abatement/design consultancy located in Singapore whose services include air
dispersion modeling.
http://www.aromatrix.com/AirDispersionModelling.htm
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P & I Design Ltd.
A chemical engineering and environmental management consultancy located in Stockton-on-Tees,
England. They have developed a basic Gaussian dispersion model implemented with Microsoft's Excel
spreadsheet program.
http://www.pidesign.co.uk/disperse.htm
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Power Technology
The engineering and scientific center of PowerGen UK plc. They use various models to simulate gas
and dust dispersion from: industrial chimneys, stockpiles, fugitive sources, accidental releases,
and cooling tower plumes. The models include: ADMS (Atmospheric Dispersion Modeling System),
VISPACT (an in-house cooling tower model), MATADOR (UK acid rain model), MODELS-3 and U.S. EPA
models.
http://www.powertech.co.uk/env_fuel/env_modelling.htm
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Engineering, Compliance & Construction, Inc.
Environmental engineering consultants based in Little Rock, Arkansas, USA who utilize air
dispersion modling in their air permitting services, compliance studies and air toxics studies.
http://www.ecci.com/envcapable/airdispersion.htm
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Envirotest
An environmental consulting firm based in Brisbane, Australia offering services in Environmental
Impact Assessments and Environmental Risk Assessments, including the use of the AUSPLUME air
dispersion model.
http://www.envirotest.com.au/services/air_emiss.html
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Sage Environmental Services
An environmental consulting company based in Texas (with offices in Richardson, Austin and
Beaumont)who offer services in air dispersion modeling, air permitting and compliance, risk
management plans and offsite consequence analyses.
http://www.sageenvironmental.com/services.htm
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Ambient Air Services, Inc.
Located in Starke, Florida, USA, this firm's services include: air dispersion modeling; stack
design and building downwash evaluations; toxic air pollution studies, model validation studies;
and air quality impact analyses.
http://www.atlantic.net/~aasi/modeling.htm
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Sullivan Environmental Consulting
This firm (located in Alexandria, Virginia, USA) offers services including urban scale air quality
assessment, exposure assessment, permit support, air quality modeling, and risk management
planning.
http://www.sullivan-environmental.com/serv01.htm
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Applied Environmental Consultants, Inc.
Consultants located in Tempe, Arizona, USA who provide air dispersion modeling in support of air
quality permitting and impact analyses as well as air quality regulatory compliance.
http://www.aecinc.org/html/airimpact.html
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Castings Development Centre
A research/development/consultancy facility located in Sheffield, England that uses the ADMS-2
dispersion model to offer air pollution dispersion modeling services to the castings production
industry.
http://www.castingsdev.com/
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Janicke Consulting
A consulting firm located in Dunum, Germany who develop and market air dispersion modeling
software, such as: LASAT, a Lagrangian dispersion model; IBJplume, a Gaussian model; IBJXodor; a
model specifically for odor dispersion.
http://www.janicke.de/htm/e_products.htm
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D&E Technical
D&E Technical is an environmental engineering and software development company located in
Champaign, Illinois, USA. Their services include air dispersion modeling and hazard analysis.
http://www.detech.net/aboutde.htm#Air
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Exponent, Inc.
A firm of scientific and engineering consultants, headquartered in Menlo Park, California with
multiple offices across the United States, whose services include air dispersion modeling.
http://www.exponent.com/practices/hydrology/airquality.html
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Stanger Science and Environment
Environmental consultants with multiple offices in England. Together with the University of
Greenwich, Stanger operates a 24-hour telephone helpline for air dispersion modeling.
http://www.stanger.co.uk/default.asp?page=airqual/modelhlp/helpline.htm
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Payne Environmental Corp.
An environmental consulting firm (headquartered in Madison, Connecticut, USA) whose services
include air permitting, emission inventories, dispersion modeling studies, and health risk
assessments.
http://www.paynecorp.com/service4.htm
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NPN Environmental Engineers
Consulting environmental engineering firm located in St. Louis, Missouri, USA. Services include
air dispersion modeling, air emission inventories, air permitting and compliance programs.
http://www.npnenv.com/air_quality.htm
Reviews Rating: Not yet Rated
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RWDI Inc.
Rowan Williams Davies & Irwin Inc. (RWDI) are a Canadian firm of consulting engineers with
offices in Guelph, Ontario and Calgary, Alberta. Their services include air emissions dispersion
modeling and accidental release dispersion modeling using SCREEN3, AERMOD, ISCST3, ISC-PRIME,
CALPUFF, SLAB, HGSYSTEMS and GASCON2.
http://www.rwdi.com/html/indust/exp/airquality.asp
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Cermak Peterka Peterson Inc. (CPP)
A wind engineering consulting firm (located in Fort Collins, Colorado, USA) that offers wind tunnel
modeling of pollutant transport and dispersion involving complex building and terrain situations.
http://www.cppwind.com/services/pollut.html
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EnviroComp Consulting, Inc.
EnviroComp Consulting (based in Fremont, California, USA) develops and applies computational
techniques to study environmental problems and, in particular, air pollution by using data
analysis, simulation modeling, statistical methods, and advanced visualization.
http://envirocomp.com/whoweare.htm
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Stone Lions Environmental Corporation
A consulting firm headquartered in Rolling Hills Estates, California, USA who offer services in air
dispersion modeling, toxic chemical exposure evaluations, reconstruction of past environmental
exposures, and specialized software.
http://www.stonelions.com/homepage.htm
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Entech Engineering
A consulting firm based in Westboro, Massachusetts, USA who provide technical support and computer
software to the nuclear power industry in the areas of radiological engineering, and
atmospheric dispersion of radioactive effluents.
http://www.entechengineering.com/aeolus3.htm
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Jim Clary & Associates
Consultants, based in Dallas, Texas, USA, who offer dispersion modeling services and a proprietary
Air Modeling Organizational System (AMOS) designed to create input files and organize all of the
ISCST modeling runs for an entire project.
http://www.jimclaryandassociates.com/default.htm
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UAI Environmental, Inc.
An environmental engineering and consulting firm based in Reading, Pennsylvania, USA that offers a
range of air dispersion modeling services using models such as: AERMOD, ISC3, CALMET, CALPUFF,
CTDMPLUS, ALOHA and others.
http://www.uaienvironmental.com/model.asp
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Katestone Scientific Pty. Ltd.
Consulting firm based in Brisbane, Australia that offers air dispersion modeling services, using
these models: AUSPLUME, AUSMET/AUSPUFF, LADM, TAPM, CALMET/CALPUFF, and the U.S. EPA's ISC
models.
http://www.katestone.com.au/industrial_dispersion_modelling.htm
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EnviroModeling Ltd.
EnviroModeling Ltd. is based in Santiago, Chile and provides visual software for meteorological and
air quality needs: CalDESK - display and analysis software for the CALPUFF modeling system, and
CAMxDESK - graphical analysis software for the CAMx photochemical model.
http://www.enviromodeling.com
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Shell Engineering & Associates
Environmental management consultants located in Columbus, Missouri, USA. Their services include:
air quality monitoring; air permitting; and air dispersion modeling involved in evaluating the
offsite consequences of accidental releases and of air toxics emissions.
http://www.shellengr.com/Dispers.htm
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Pinchin Environmental Ltd.
A consultant group based in Mississauga, Ontario, Canada (with multiple offices in Canada) who
offer air dispersion modeling services. The dispersion models utilized include Ontario Regulation
346 as well as these U.S. EPA models: Screen3, ISCST3, AERMOD and PRIME.
http://www.pinchin.net/services/air/air.htm#Dispersion
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EnCoCo
A firm headquartered in Lahaina, Hawaii, USA and offering air dispersion modeling software focused
primarily upon the regulatory requirements of Germany.
http://www.encoco.com
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Environmental Quality Management Inc. (EQ)
A consulting firm based in Cincinnati, Ohio (with multiple offices across the USA) that provides
environmental engineering and air quality services including permitting, compliance studies, NSPS
reviews, and air dispersion modeling.
http://www.eqm.com/proj-des/air.html
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Enviroplan Consulting
A consulting firm (headquartered in Fairfield, New Jersey, USA) that offers services in air
dispersion modeling, air quality and meteorological monitoring, air pollution emissions estimation,
permitting and compliance plans, hazard assessments and risk management plans.
http://www.enviroplan.com
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EnviroMod.com Modeling
EnviroMod.com is a part of the Software Solutions & Environmental Services Company
headquartered in St. Paul, Minnesota, USA. They offer a suite of services to environmental
industry and government agencies concerned with local, mesoscale, and regional meteorological and
air quality modeling as well as air pollution dispersion modeling.
http://www.enviromod.com/modeling.html
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Consulting Air Pollution Modelers
A consulting group (located in North Clayton, Victoria, Australia) who provide: air pollution
dispersion and consequence modeling services; complex terrain modeling; meteorological services;
and training in dispersion modeling. The models used include AUSPLUME, AUSTOX, TAPAS, TAPM,
AUSPUFF/CALPUFF, ISC3.
http://www.camm.net.au
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Air Science Inc.
A consulting firm in Lakewood, Colorado, USA offering services in the air quality aspects of
environmental impact studies, air quality and meteorological monitoring, dispersion modeling,
visibility degradation analysis, and permitting of industrial facilities. The models utilized
include SCREEN3, ISCST3, CALPUFF, VISCREEN, PLUVUE, and IWAQM.
http://www.airsci.com/
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BlazeTech Corporation
Consultants (in Cambridge, Massachusetts, USA) with expertise in: air dispersion modeling, off-site
consequence analysis, fire and explosion, and other safety problems. For dispersion modeling, the
firm uses ADORA (Atmospheric Dispersion of Reacting Agents) ... a model with complex thermodynamics
and chemical reactions.
http://www.blazetech.com
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Theakston Environmental Control, Inc.
Environmental consultants located in Ontario, Canada whose services include physical modeling as
well as computer modeling of stack exhaust gas dispersion and dust dispersion.
http://www.theakston.com/exhaust.htm
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National Environmental Technology Centre (NETCEN)
NETCEN is a subsidiary of AEA Technology Environment based in Culham, Abingdon, Oxfordshire,
England, and offers a range of air quality and dispersion modeling services.
http://www.aeat.co.uk/corporate/expetise/netcen.htm
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Dispersoft Consultants Inc.
A consulting firm headquartered in Sillery, Quebec, Canada, that offers service in air pollution
dispersion modeling as well as other unrelated fields.
http://www.dispersoft.qc.ca
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Davis & Floyd
A firm of engineering and environmental consultants based in Greenwood, South Carolina, USA whose
services include air dispersion modeling for: air permitting, evaluating toxic air emission
impacts, evaluating compliance with air quality standards, and risk assessments.
http://www.davisfloyd.com/ENVServices/ENVservices.htm
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Cambridge Environmental Inc.
A group of environmental consultants headquartered in Cambridge, Massachusetts, USA. Their services
include the use of air dispersion modeling in support of health risk assessments.
http://www.cambridgeenvironmental.com/services/transport.htm
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Vector AS
Vector AS is based in Tønsberg, Norway and offers air dispersion modeling using WindSim, which is
a flow and dispersion simulator for complex terrain using computational fluid dynamics (CFD).
http://windsim.com/
Reviews Rating: Not yet Rated
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Sanders Engineering & Analytical Services, Inc.
An environmental engineering firm based in Mobile, Alabama, USA that specializes in air permitting
and air quality testing. Their air dispersion modeling includes the use of the U.S. EPA's ISC short
and long term models, complex terrain modeling, and the Valley model.
http://www.sandersengineering.com/Index.htm
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The Weinberg Group
A scientific and regulatory consulting firm, headquartered in Washington,DC, whose services include
air dispersion modeling.
http://www.weinberggroup.com
Reviews Rating: Not yet Rated
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Pacific Air and Environment
A consultant group, headquartered in Brisbane, Australia with satellite offices in Melbourne and
Sydney, who offer air quality modeling and emissions estimation services. The air dispersion models
used include models developed in Australia (AUSPLUME, AUSPUFF and TAPM) as well as models developed
in the USA (ISC3, AERMOD, CALPUFF and CALINE4).
http://www.pae.net.au
Reviews Rating: Not yet Rated
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Pollution Control Consultancy and Design
An acoustical and environmental engineering consulting firm based in Sydney, Australia that
provides a range of services which includes air dispersion modeling.
http://www.pccd.com.au/airpol.htm
Reviews Rating: Not yet Rated
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Mike Lyons and Associates
Consultants located in Balwyn, Victoria, Australia. Services offered include air pollution plume
dispersion modeling using the Australian EPA's latest "AUSPLUME" package as required
under the State Environment Protection Policy (SEPP).
http://www.mikelyons.com.au
Reviews Rating: Not yet Rated
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The Pilot Group
Consultants based in Dallas, Texas, USA who offer dispersion modeling services for: air toxic
evaluations and risk assessments; demonstrating compliance with air quality standards; evaluation
of accidental releases; stack height studies; new facility site selection; visibility studies.
http://www.pilotgroup.com/modeling.htm
Reviews Rating: Not yet Rated
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Wenck Associates
Consulting engineers based in Maple Plains, Minnesota, USA with multiple other offices in
Minnesota. Their services include the use of air dispersion modeling for air permitting,
regulatory compliance studies, air toxics evaluation, and New Source Reviews.
http://www.wenck.com/air_svcs.htm
Reviews Rating: Not yet Rated
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Risk Management Technologies
A firm located in Chennai, India offering: HAZOP training and software; air dispersion modeling;
failure and reliability analysis; risk assessment; and accident investigation ... all targeted for
the chemical process industries.
http://xlweb.com/rmt/index.htm
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Air Resource Specialists Inc.
Located in Ft. Collins, Colorado, USA, this firm provides comprehensive air modeling, permitting,
and compliance support to industrial, commercial, and government clients.
http://www.air-resource.com/compliance.html
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Pacific Environmental Services (PES)
Nationwide company headquartered in Herndon, Virginia, USA. The PES modeling section specializes in
developing, evaluating, and applying air pollution dispersion models. PES was involved in
developing the U.S. EPA's dispersion models, such as ISC3, SCREEN3, and SCREEN. PES has also been
involved in developing the new AERMIC Model (AERMOD), to be proposed by EPA as a regulatory model.
http://home.pes.com/disper.html
Reviews Rating: Not yet Rated
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Lehder Environmental Services
A Canadian consulting firm offering services in air dispersion modeling (including odor
dispersion), stack sampling, and environmental permitting. Most of Lehder's modeling work for
clients utilizes the U.S. EPA's Industrial Source Complex Short Term Model Version 3 (ISCST3).
http://www.lehder.com/airquality/air_dispersion.html
Reviews Rating: Not yet Rated
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Northern Environmental and Monitoring Services (N.E.M.S.)
NEMS offers environmental, health and safety consulting services and their dispersion modeling
expertise ranges from single stacks to multiple sources, spills and traffic pollution. NEMS is
located in Darlington, England and uses the UK Atmospheric Dispersion Modeling System (ADMS). Their
modeling has included: power plant emissions; cooling tower plume visibility; explosion risk
assessments; and odor abatement.
http://www.n-e-m-s.demon.co.uk
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The Air Group
Consultants located in Dallas, Texas, USA who offer air permitting and compliance services, air
dispersion modeling, and training workshops.
http://theairgroup.net
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EnviroChem Engineering Consultants
Located in Wolfville, Nova Scotia, Canada, the EnviroChem Engineering Consultants firm offers
chemical engineering services as well as environmental engineering services. Their environmental
services include ambient air monitoring, stack sampling and air dispersion modeling using models
such as ISC3, AFTOX, SLAB, CALINE3 and SCREEN3.
http://home.istar.ca/~ece/model.html
Reviews Rating: Not yet Rated
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Aegis Environmental Inc.
Located in Richmond, Virginia, USA, the Aegis Environmental firm offers environmental consulting
services including air dispersion modeling, offsite consequence analyses, air permitting and
regulatory compliance strategies.
http://www.aegis-environmental.com/services.html
Reviews Rating: Not yet Rated
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Zephyr Environmental Corporation
An environmental consulting firm, headquartered in Austin, Texas, USA, whose air dispersion
modeling services include: simple and complex terrain modeling; line and mobile source modeling;
and modeling of accidental dense gas releases. Zephyr utilizes U.S. EPA models such ISCST3 and
SCREEN3; and public domain models such as SLAB and RMP-COMP.
http://www.zephyrenv.com/nonframes/serv.air.html
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Iris Environmental
Consulting and engineering firm based in Oakland, California , USA whose environmental management
services include air dispersion modeling.
http://www.irisenv.com/main/
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Hastings Engineering, Inc.
Chemical and environmental consultants based in St. Louis, Missouri, USA whose services include air
dispersion modeling used for: air permitting, accidental release modeling, and risk assessments.
http://www.hastingsengineering.com/Engineers.htm
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Grove Scientific Engineering
Environmental engineering consultants, located in Orlando, Florida, USA, whose services include:
industrial air pollution studies, air permitting, emission inventories and air dispersion modeling.
http://www.grovescientific.com/air_pollution.html
Reviews Rating: Not yet Rated
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WebMET
WebMET is a repository of meteorological data for air dispersion models such as ISCST3, ISC-PRIME
and AERMOD, as well as for digital elevation terrain data. The data covers the entire United
States and can be downloaded free of charge. The site is sponsored by Lakes Environmental located
in Ontario, Canada.
http://www.webmet.com
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Acu Tech
A nation-wide consultant firm (headquartered in San Francisco, California, USA) specializing in
process safety and risk management services, training, and software. AcuTech makes use of these
dispersion modeling programs: ALOHA, ARCHIE, DEGADIS, HGSYSTEM, SLAB, TSCREEN, and PHAST.
http://www.acutech-consulting.com/consulting/release.html
Reviews Rating: Not yet Rated
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ENVIRON: Environmental Consultants
An international firm (headquartered in Novato, California, USA) offering services in: dispersion
modeling of emissions from industrial plants and hazardous waste sites; air toxics impact studies;
air pollution compliance assistance; emergency release modeling and consequence analysis;
regional modeling of photochemical reactive plumes and of particulate matter; and visibility
models.
http://www.environ.org/as.html
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Earth Tech
A worldwide environmental consultant firm, headquartered in Long Beach, California, USA, whose
modeling group are recognized experts in air dispersion modeling. They have developed or enhanced
many models (CALPUFF, CALMET, CALGRID, BLP, ISC3, CTDMPLUS, OCD, and KSP), several of which are
now U.S. EPA 'Guideline' models.
http://src.com/aq/amodels1.htm
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North American Weather Consultants
Meteorological consultants (located in Salt Lake City, Utah, USA) who offer extensive experience in
performing dispersion modeling for: simple, complex or intermediate terrain; single or multiple
emission points; and buoyant or dense gas releases.
http://www.xmission.com/~nawc/aq.html
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Dyadem International, Ltd.
A software development company in Toronto, Canada that also provides a full range of risk
management consulting services. They offer software for Risk Analysis, Process Hazard Analysis
(PHA), HAZOP, Failure Modes and Effects Analysis (FMEA), and Risk Management Plans (RMP).
http://www.dyadem.com
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RTP Environmental Associates
RTP has offices nationwide in the USA and has performed modeling studies for: rural and urban
locations; single-point sources; complex multi-source industrial sources; flat terrain; complex
terrain; and time and spatial scales from short-term to multi-year analyses over distances of
several meters to several hundred kilometers.
http://rtpenv.com/
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ENSR: Environmental Consultants and Engineers
A worldwide environmental service company (headquartered in Westford, Massachusetts, USA) that has
developed: dispersion models that accommodate complex terrain and aerodynamic downwash; visibility
models; hazardous air pollutant dispersion models; and others for facilities located in dispersion
environments where standard models are inaccurate.
http://www.ensr.com
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MET Associates
A consultant firm in Dayton, Texas, USA that provides litigation support and expert witness
testimony to environmental lawyers and to insurance companies for either plaintiffs or defendants
in court cases that involve air dispersion and air quality modeling.
http://www.metassociates.net/
Reviews Rating: Not yet Rated
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Tech Environmental Inc. (TEI)
Located in Waltham, Massachusetts, USA, TEI provides consulting for air quality and noise issues.
Their services include: permit applications; siting and feasibility studies; environmental impact
assessments; and technical support tasks such as air dispersion and noise modeling, planning, and
monitoring.
http://techenv.com/
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Meteorological Solutions Inc.
Air quality consultants (located in Salt Lake City, Utah, USA) who provide a comprehensive range of
air dispersion modeling services. The site includes links to the specifics of their various
services as well as to a listing of the names, email addresses, and experience of their key people.
http://www.metsolution.com/
Reviews Rating: Not yet Rated
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McVehil-Monnett Associates
An air quality consulting firm, headquartered in Englewood, Colorado, USA with other offices in
Arizona and Wyoming. Their services include air dispersion modeling for determining: ambient
impacts for permitting industrial sources, impacts of cooling tower plumes, impacts of complex
terrain on pollutant dispersion, mobile source impacts, and toxic air pollutant exposures.
http://www.mcvehil-monnett.com/
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Enviroware s.r.l.
These consultants, located in Italy, provide a number of air dispersion models. The site includes
an online Gaussian dispersion model called Tox-Flam, for releases of inert buoyant pollutants into
a mixing layer of a user-specified height.
http://www.enviroware.com
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Cambridge Environmental Research Consultants
Scientific consultants in the field of atmospheric dispersion located in Cambridge, England.. They
offer a range of air dispersion models including: ADMS 3 for dispersion of industrial emissions;
ADMS-SCREEN for initial screening studies of emission dispersion; and GASTAR for dispersion of
accidental dense gas releases.
http://www.cerc.co.uk
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AirNova Inc.
Services include stack testing, stationary source isokinetic sampling, continuous emission
monitoring, compliance permitting, air toxics pollution emission sampling, ambient air quality
dispersion modeling. Located in Pennsauken, New Jersey, USA.
http://www.airnova.com
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Bison Engineering, Inc.
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
Reviews Rating: Not yet Rated
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DNV
Det Norske Veritas (DNV), headquartered in Oslo, Norway, is an international consulting firm with
numerous offices worldwide. Their primary focus is on safety, environmental, risk management, and
consequence analyses using their own PHAST dispersion modeling software.
http://www.dnv.com
Reviews Rating: Not yet Rated
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Applied Modeling Inc. (AMI)
Consultants (in Woodland Hills, California, USA) who offer services in: dispersion modeling (using
ISCST3 model); regional air quality modeling (for ozone and for particulate matter); urban airshed
modeling; and accidental release modeling (using ALOHA, CAMEO, SLAB, DEGADIS and SCREEN models).
http://www.amiace.com
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MSES Consultants
An environmental consulting firm providing services in the areas of planning, engineering, safety,
industrial hygiene, the earth and environmental sciences, design and regulatory assistance. The
firm is located in Clarksburg, West Virginia, USA.
http://www.msesinc.com
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