A B C D E F H I J K L M
1 OAR 340-202-0210     TABLE 1  
2 Table 1     OAR 340-200-0020  
3 MAXIMUM ALLOWABLE INCREASE     SIGNIFICANT AIR QUALITY IMPACT  
4 Micrograms per cubic meter     Pollutant Averaging Time Air Quality Area Designation  
5 CLASS I II III Class I Class II Class III  
6 Pollutant Micrograms per cubic meter                
7 Particulate matter:                  
8 [1] PM2.5, Annual arithmetic mean 1 4 8 PM2.5 (µg/m3) Annual 0.06 0.3 0.3 0.25714286
9 1PM2.5, 24-hour maximum 2 9 18 24-hour 0.07 1.2 1.2 0.03428571
10 PM10, Annual arithmetic mean 4 17 34 PM10 (µg/m3) Annual 0.2 0.2 0.2  
11       8 30 60 24-hour 0.3 1 1  
12 PM10, 24-hour maximum                  
13 Sulfur dioxide:       SO2 (µg/m3)* Annual 0.1 1 1  
14 Annual arithmetic mean 2     24-hour 0.2 5 5  
15       5     3-hour 1 25 25  
16 24-hour maximum 25                
18 3-hour maximum                  
19 Nitrogen dioxide:       NO2 (µg/m3) Annual 0.1 1 1  
20 Annual arithmetic mean 2.5                
21 Class II                
22 Pollutant Micrograms per cubic meter                
23 Particulate matter:                  
24 1PM2.5, Annual arithmetic mean 4                
25 1PM2.5, 24-hour maximum 9                
26 PM10, Annual arithmetic mean 17                
27       30                
28 PM10, 24-hour maximum                  
29 Sulfur dioxide:                  
30 Annual arithmetic mean 20                
31       91     CO (mg/m3)** 8 hour --- 0.5 0.5  
32 24-hour maximum 512     1-hour --- 2 2  
33             * micrograms/cubic meter  
34 3-hour maximum       **milligrams/cubic meter  
35 Nitrogen dioxide:                  
36 Annual arithmetic mean 25                
37 Class III                
38 Pollutant Micrograms per cubic meter                
39 Particulate matter:                  
40 1PM2.5, Annual arithmetic mean 8                
41 1PM2.5, 24-hour maximum 18                
42 PM10, Annual arithmetic mean 34                
43       60                
44 PM10, 24-hour maximum                  
45 Sulfur dioxide:                  
46 Annual arithmetic mean 40                
47       182                
48 24-hour maximum 700                
50 3-hour maximum                  
51 Nitrogen dioxide:                  
52 Annual arithmetic mean 50                
72 [1] PM2.5 Increments will become effective on October 20, 2011.          

Sheet1