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Overall environmental effect

Overall environmental effect. Neil Iles PPC Compliance Officer 26 th January 2012. Overview . Already covered Emission monitoring Emission testing Dispersion modelling This presentation covers how we evaluate the overall effect of all the emissions that we’ve measured, modelled.

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Overall environmental effect

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  1. Overall environmental effect Neil Iles PPC Compliance Officer 26th January 2012

  2. Overview • Already covered • Emission monitoring • Emission testing • Dispersion modelling This presentation covers how we evaluate the overall effect of all the emissions that we’ve measured, modelled

  3. Map of ground level concentrations Example: Predicted annual mean PM10 concentrations for all Cemex Rugby sources for 2002 (µg/m3) (from Cemex Tyre Trial Report 2006)

  4. How do we assess this information ?

  5. Air Quality Standards • Compare ground level concentrations with – • EU Environmental Quality Standards (EQS) • UK Environmental Quality Standards (UK QS) • Environmental Assessment Levels (EAL)

  6. Environmental Quality Standards • EU standards (EQS) • set by European Legislation • EQS only exist for limited number of substances eg NOx, SOx, PMs • UK QS’s • also legally binding but lower status • cover similar materials • some differences in conditions in UK QS and EQS • Environment Assessment Levels • have no statutory basis • EALs are standard for ‘harm’ and are based on a variety of published data, mostly health and safety occupational health limits • EALs have recently been reviewed and are under consultation

  7. Assessing emissions - considerations • Pollutant levels from the installation (PC) • Background pollutant levels (BG) • Long-term exposure • Total concentration (PEC) = PC + BG • Short-term exposure • Total concentration (PEC) = PC + 2 x BG • Where PEC > EQS or EAL - unlikely to be acceptable PEC = Predicted Environmental Concentration

  8. Considering multiple substancesUse of Environmental Quotients (EQ) • Calculate EQ for each substance EQ = PC/EAL or PC/EQS 2. Add EQs for different substances to get a measure of total impact i.e. EQ total = EQ1 + EQ2 +EQ3 + …….. • Not completely accurate but useful tool for comparing • Used by CEMEX for comparing Alternative Fuel trials

  9. EQ = PC / EAL  PC  EAL  Table from 65% Climafuel Report

  10. Further information Horizontal Guidance Note H1 – Annex (f) for - • Background information • Assessment techniques • Details of EQSs, EALs and POCPs* * POCP = Photochemical Ozone Creation Potential

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