Particulate Matter. "Particulate matter," also known as particle pollution or PM, is a complex

mixture of extremely small particles and liquid droplets. Particle pollution is made up of a number

of components, including acids (such as nitrates and sulfates), organic chemicals, metals, and soil

or dust particles. Once inhaled, these particles can affect the heart and lungs and cause serious

health effects. Includes PM2.5 (particles less than 2.5 microns in aerodynamic diameter), PM10

(particles less than 10 microns in aerodynamic diameter), and PMC (particles between 2.5 and 10

microns in aerodynamic diameter).

Parts per Million (ppm). This unit represents the concentration of the pollutant in a million parts

of air. Carbon monoxide is often measured in units of ppm.

Parts per Billion (ppb). This unit represents the concentration of the pollutant in a billion parts

of air. Ozone concentrations in BenMAP are reported in units of ppb.

Pooling. The combining of different sets of data. BenMAP has several pooling methods,

including fixed effects, fixed/random effects, and subjective weighting. Appendix K discusses

the pooling approaches available in BenMAP.

Point Mode. When defining the configuration, you may choose to either estimate adverse

health effects in point mode or using a Latin Hypercube. The point mode simply means that

BenMAP will use the mean value of the coefficient in the health impact function.



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