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air quality

Air quality

Environmental protection is one of thyssenkrupp CSA’s priorities.

To ensure the air quality of the state of Rio de Janeiro, INEA (State institute of the Environment) operates monitoring stations at different locations within the state. There are three stations in the vicinity of thyssenkrupp CSA that allow free access to the data collected and information about air quality in the region. To access this data, click here: State environmental authority (INEA)

Continuous Monitoring and Stationary Sources

thyssenkrupp CSA conducts continuous monitoring of its stationary sources through meters installed in its chimneys that monitor emissions of particulate matter and gases, such as SO2 (sulphur dioxide) and NOx (nitrogen oxides), 24 hours per day. The values measured are sent via the Internet, every hour, to the Telemetric Centre of INEA (State Institute of the Environment). thyssenkrupp CSA’s environmental team analyses the continuous monitoring data daily, comparing the results with the emissions limits established in the INEA License and by CONAMA (Brazilian National Council of the Environment) Resolution nº 382/2006. All the continuous measuring equipment is periodically calibrated, in accordance with the current legislation.

Isokinetic Monitoring of Fixed Sources

Discontinuous monitoring – or isokinetic monitoring – of stationary sources is also carried out. thyssenkrupp CSA is associated with PROMON Ar (Programme for Self-Monitoring of Atmospheric Emissions) and monitors its 19 principal chimneys at a frequency determined by INEA. The data collections are carried out by a contractor company and the samples are analysed by a laboratory certified by INEA and accredited by INMETRO (Brazilian Institute of Meteorology, Quality and Technology). Tests using 03 samples of 60 minutes duration each are carried out on days determined by the environmental agency for each source monitored. The results of these samples should comply with the emission limits established by the (Operating) License and by CONAMA Resolution nº 382/2006, and are reported monthly to INEA.

Monitoring of Fugitive Emissions

In addition to monitoring the stationary sources, thyssenkrupp CSA monitors so-called “fugitive emissions”. These emissions are visible and are so called because they were not captured by the existing environmental control system.

The monitoring of the fugitive emissions of the Blast Furnace and the Steel Plant is carried out using continuous video cameras. These cameras are installed at certain points that allow the best view of the area being monitored.

INEA has control over one of the cameras installed for monitoring fugitive emissions. Using this data, and 360º rotation, the environmental agency is able to monitor CSA’s Blast Furnace, Emergency Pit and Steel Plant.

In addition to the monitoring of the Blast Furnace and Steel Plant by cameras, CSA also carries out the monitoring of the fugitive emissions of the Coking Plant’s ovens by visually comparing images, where operators classify any emissions that may have occurred on three levels, depending on the criticality of the occurrence.

All the results from the monitoring of atmospheric emissions, whether of stationary sources or fugitive emissions, are reported on a three-monthly basis through reports delivered to INEA, which include critical analyses of the results and the actions taken to resolve the causes.

Monitoring of Air Quality

thyssenkrupp CSA has installed and operates an Automatic Meteorology and Air Quality Monitoring Network – RAMQAM.

This network is composed of 03 automatic stations installed in public schools in the region, and was inspected and approved by INEA in January 2009. The stations of CSA’s RAMQAM network are fully automated, carrying out measurements of the concentrations of pollutants in the atmosphere and surface weather conditions, 24 hours a day, with the data being sent hourly to INEA’s Telemetric Centre.

The air quality and meteorological parameters monitored at each station are listed below:

SO2 Sulpher dioxide HCT Hydrocarbons VV Wind Speed

NO Nitrogen monoxide O3 Ozone PP Pluviometric Precipitation

NO2 Nitrogen dioxide PI Inhalable Particulates such as PM10 PA Atmospheric Pressure

NOX Nitrogen oxides PTS Total Particulates in Suspension RS Global Solar Radiation

CO Carbon monoxide BTX Benzene, Tolune, Xylene TA Air Temperature

CH4 Methane DV Wind Direction UR Relative Air Humidity

HCnM Non-methane hydrocarbons

To ensure that the measurements of the pollutants are reliable, all the analysers are calibrated monthly, using a standard gas certified for each pollutant. Calibration certificates are issued and sent to INEA.

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