Accredited laboratory No. 1599 · ČSN EN ISO/IEC 17025naturchem@naturchem.cz+420 603 216 983
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Studies and calculations

Modelling calculations

Do you need to quickly compare stack, plant room or transport variants? We perform immission and noise modelling calculations — documentation for a study, EIA or authority consultation.

Credibility and authorisations

Accredited laboratory No. 1599ČSN EN ISO/IEC 17025Outputs for KHS, ČIŽP and regional authoritiesEIA authorisation and expert reports

NATURCHEM is an accredited testing laboratory No. 1599 (ČIA) and an authorised body for emission, workplace and noise measurements across the Czech Republic. More on credentials and experience: Accreditation & authorisations.

Service overview

When you need this service

  • You are planning a new project or source capacity change
  • You need variant assessment of operation
  • An authority requires immission or noise evaluation
  • You are preparing a dispersion or noise study

What we provide

  • We model immission contributions from air sources and transport on site
  • We prepare noise calculations for technologies, site and roads
  • We compare operational or source location variants
  • We prepare outputs for a study, EIA or authority consultation

What you receive

  • modelling calculation results with evaluation
  • documentation for dispersion or noise study
  • variant comparison and recommendations for next steps

How to get started

For an initial scope assessment, please send:

  • source technical parameters and emission data
  • project layout and surrounding development
  • operating schedule and variants
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Additional information for preparing your inquiry

Practical project examples

  • immission modelling calculation for new technology on site
  • noise calculation for plant room or HVAC location variants
  • immission contributions for a landfill or boiler dispersion study

Typical mistakes and risks

  • Calculation without verified input emission data
  • Failure to consider all relevant sources on site
  • Confusing calculation with field measurement for existing operation

FAQ for this service

When is a dispersion study required?

Prepare a dispersion study for a new or modified emission source, technology change, capacity increase, EIA, permitting proceedings or on instruction from the regional authority.

Who may prepare a dispersion study?

A dispersion study may be prepared by an authorised person within the relevant scope.

What documentation is needed for a dispersion study?

Typically a technology description, emission parameters, stack height and diameter, volumetric flow, temperature, operating hours, site layout, transport data, surrounding development data and the study purpose.

Can a dispersion study be prepared for variants?

Yes. For projects in preparation, multiple technology, stack, operating mode, capacity or transport intensity variants can be compared. Variant assessment helps the investor and designer find a technically and environmentally preferable solution.

When is a noise study appropriate?

A noise study is appropriate before implementing a new noise source, during technology change, for industrial sites, HVAC, heat pumps, transport, storage and production operations, or as documentation for building proceedings, KHS or EIA.

View all FAQ — Dispersion studies, immissions and odour

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Send a description of the technology, authority requirements or available documents. We will propose the measurements, study or documentation needed for your purpose.

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