Air Quality Monitoring Program
Since 2009, PPA S.A. has been working closely with the National Technical University of Athens monitoring air
quality parameters through a special permanent monitoring station. The scope of this monitoring program is
to identify, quantify and evaluate the port's gas emissions, as well as to examine potential operational
techniques for a cleaner and healthier air in the port area. In addition, the Program has recently been
reinforced with three (3) additional permanent monitoring stations for specific atmospheric parameters.The
parameters monitored at the permanent station are nitrogen oxide NOx, sulphur dioxide SO
2
, carbon
monoxide CO, Ozone Ο
3
, particles PM
10
and PM
2.5
, and hydrocarbons BTEX.
According to the annual report of the Monitoring Program for the year 2023, the following main conclusions
emerge:
• Volatile organic compounds (VOCs) are at low concentration levels. The annual average benzene
concentration is below the limit value of 5.0 μg m-3. The average value of benzene, toluene,
ethylbenzene, m+p-xylene and o-xylene were determined to be 3.3, 9.1, 2.0, 6.1 and 2.1 µg m-3
respectively. The results do not differ from those of the previous measurement interval.
• Suspended particles show a variation in their concentrations. The annual mean value of particulate
matter (PM10) is 43,6 μg m-3 and exceed the limit of 40 μg m-3. During the measurements the daily
limit of 50 μg/m3 was exceeded on 85 occasions. The exceedances are mainly observed in the winter
period and are related to the well-known problem of smog due to combustion and less so in the
spring period due to the transport of dust from other areas.
• The annual mean value of NO2 is 30.1 μg m-3 and does not exceed the annual limit of 40 μg m-3.
• NO2, SO2, and CO did not show exceedances of the hourly mean value in the first and second, daily
mean value in the second and eight-hourly mean value in the third.
• O3 did not show any exceedance of the hourly average limit (update limit) nor of the 8-hourly average
limit.
Sea Water and Sediments Monitoring Program
Seawater and Sediment Quality Monitoring Program is conducted in cooperation with the Laboratory of
Health Technology of the School of Civil Engineering of the National Technical University of Athens. The scope
of this program is to perform qualitative assessment in the entire marine area and propose improvement
actions when deemed necessary.
In more detail, the Sea Water Monitoring Program constitutes of an analysis of 20 sea samples twice a year.
The samples are analyzed for the following parameters: a) general physicochemical parameters (temperature,
pH, salinity, conductivity, total dissolved solids, dissolved oxygen, turbidity, transparency, coloration,
suspended solids), b) nutrients (orthophosphates, ammonium nitrogen, nitrite nitrogen, nitrate nitrogen), c)
heavy metals (nickel, lead, copper, iron, chromium, zinc, cadmium, mercury, arsenic), d) microbiological
parameters (total coliforms, E. Coli, enterococci), e) organic pollutants (hydrocarbons and TBT (tributyltin)).
Sea Sediments Monitoring Program includes an analysis of 10 sediments samples twice a year. The samples
are analyzed for the following parameters: a) heavy metals (nickel, lead, copper, iron, chromium, zinc,
cadmium, mercury, arsenic, manganese), b) PCBs (polychlorinated biphenyl) related compounds, c) PAHs
(polycyclic aromatic hydrocarbons), d) TBT compounds, e) TOC (total organic carbon).
The results of each program are submitted on a annual basis to relevant authorities and also included in the
environmental report which is published in the Company’s website.