Table 1. National and Florida ambient air quality standards ; ug/m = micro- 

 gram per cubic meter (Florida State Department of Environmental Regulation, 

 Bureau of Air Quality Management April 1980). 



Pollutant 



Time frame 



Pr i ma ry 

 standards 



Secondary, 

 standards 



Florida 

 standards 



Particulate 

 matter 



Sul fur oxides 



-ic I 3c 

 75 ug/m^ 



260 ug/m 



3 



annual 

 (geometric mean ) 

 24-hour 



annual ^ SO ug/m"" ^ 



(arithmetic mean ) (0.03 ppm)^ 



24-hour 365 ug/m 



b (0.14 ppm) 

 3-hour 



Carbon monoxide 



8- hour 



1-hour 



Ni trogen ^ 

 dixoide 



Photochemical 

 oxidants9 



annual 

 (arithmetic mean) 



1-hour 



Hydrocarbons 3-hour 



(nonmethane) (6 to 9 a.m.' 



i 

 10 ug/m 

 (9 ppm)- 

 100 ug/m 

 (35 ppm) 



3 



100 ug/m 



(0.05 ppm) 

 235 ug/m"^ 



160 ug/m 

 (0.24 ppm) 



60 ug/m^ 

 150 ug/m 



150 ug/m-" 

 (.02 ppm)3 

 260 ug/m 

 (0.1 ppm)^ 

 1300 ug/m 



(same as 

 primary) 



(same as 

 primary 



(same as 

 primary) 



(same as 

 primary 



(same as 

 primary) 



60 ug/m, 

 150 ug/m 



3 

 150 ug/m 



(0.02 ppm) 



260 ug/m3 



(0.1 ppm)^ 



1300 ug/m 



(0. 5 ppm) 



(same as 

 primary) 



(same as 

 primary) 



(same as 

 primary) 



3 

 160 ug/m 

 (0.08 ppm) 



(same as 

 primary) 



^The air quality standards and a description of the Federal Reference Methods 

 (FRM) were published on April 30, 1971, in 42 CFR 410, recodified to 40 CFR 

 50 on November 25, 1972. The new FRM for nitrogen dioxide was published on 

 December 1, 1976, as 40 CFR 50. 



Not to be exceeded more than once a year. 



""Geometric mean is a measure of central tendency. It is the nth root of the 

 product of n individual data values recorded during the given period. 



Arithmetic mean is the most common measure of the central tendency. It is 

 the sum of the data collected during the given period divided by the number 

 of observations in the same period. 

 Parts per mill ion. 



Chemiluminescence has been established as the FRM and the sodium arsenite and 

 trienthanol amine guiacol sulfite (T6S) methods have been identified as equiv- 

 alent methods. 



^The FRM measures 0. (ozone). 



The hydrocarbon HC standard is a guide to devising State implementation plans 

 to achieve the oxidant standard. The HC standard does not have to be met if 

 the oxidant standard is met. 



247 



