The particulate monitor was calibrated and maintained according to
the manufacturers specifications. The fibre filters were replaced
once after two weeks. Monitored data used to assess the health
risks posed by exposure to PM10 in the population of eMbalenhle
were compared with the South African National Ambient Air Quality
Standard (NAAQS) [4]. The PM10 concentrations were measured in
15 minutes intervals, the raw data output was divided by a
calibration factor of 2 and the 24-hour averages were calculated.
The monitored PM10 concentrations were compared with the NAAQS
which were originally set to protect human health.