a network of ten automated continuous stations within the Metro Manila Airshed capable of measuring criteria
pollutants (i.e., PM10, SO2, NO2, CO and O3) and meteorological data was put in place). Two of the ten stations could
also measure non-criteria pollutants (PM2.5, methane, non-methane hydrocarbon, benzene, toluene, and xylene).13
The stations were operational from 2004 to 2005. Operations were then halted because of contractual disputes
between the DENR and the contractor. The DENR and the contractor then agreed that the latter would make the
stations operational and turn the stations over to DENR by September 2009.14 The status of turn-over of monitoring
stations has yet to be confirmed; however, Air Quality Management Section – Environment Management Bureau
(AQMS-EMB) planned to run the monitoring stations by the end of 2009.