All stationary sources of air pollution are required to submit
to DENR-EMB, on a quarterly period, a self-monitoring report
to monitor compliance with emission standards. Periodic
auditing, monitoring, and source stack sampling are being
conducted by the regional offi ces. Th e method followed is
based on USEPA procedures. Major industrial facilities such
as power plants, petroleum/petrochemical plants, and cement
plants are required to install continuous emissions monitoring
systems. Incinerators that emit toxic and hazardous fumes are
banned in the Philippines.