Metrics compliance with standards

It is useful to recollect the limits set by WHO 90 pg/m3 for total suspended particulates, 50 pg/m3 for sulfur dioxide, and 50 pg/m3 for nitrogen dioxide. It is apparent that the world has a long way to go till compliance with these numbers is achieved. Mexico City is notorious for bad ah quality. Pollution levels exceed WHO standards 350 days per year. More than half of all children in the city have lead levels in their blood sufficient to lower intelligence and retard development. The 130,000 industries and 2.5 million motor vehicles spew out more than 5500 metric tons of ah pollutants every day, which are trapped by the mountains tinging the city. 

The CSB report claimed that OSHA inspections failed to focus on compliance with process safety standards. The report also identified nine organizational factors for BP that contributed to the incident. Among the factors was Safety campaigns, goals, and rewards focused on improving personal safety metrics and worker behaviors rather than on process safety and management safety systems. ... 

There is much controversy surrounding the introduction of a new PM2.5 metric. One point of controversy is the size cut. Some have concluded that a PMi 0 metric would be more appropriate if the goal is to reduce the amount of the smallest particles arising from combustion. Resolution of this controversy has been stymied by the relatively modest amount of PM2.5 and PMi.o data available, since most of the data have been collected for regulatory compliance purposes (i.e., TSP or PMio measurements when these metrics were the standard). Another point of controversy relates to interpretation of the health effects at low concentrations of PM. The EPA has interpreted the available data as indicating a 4% increase in daily mortality for a 50 pg/m increase in PM concentration with no evidence for a threshold eoneentration. 

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