173 08 0.7 TAM -6 TAM -5 0.6 502, ppm 0.5 MAX 0.4 MAX 0.3 Fe- S02, ppm 95 50 0 | 45 | 90 | | | 135 gO 225 WIND DIRECTION, deg I 270 | 35 360 0 135 180 225 WIND DIRECTION, deg 270 315 Fic. 135.—Selected percentile curves relating SO: concentrations to wind direction at TAMStations 5-8 of these ranges. Thus, if the wind directions are listed for every ten degrees, the percentile values will be repeated as often as necessary. The order of the variables in the columns should be arranged so that the last column represents the variable which influences the SOz concentrations the least and the first column the most. Further, wind speed and temperature should be presented in de- scending order since lowest values of each correspond to highest SO2 concentration. (Table 62 is a sam- ple of an intermediate provisional table where the temperature is shown in increasing order. In the final tables temperatures will appear in decreasing order.) Ideally, the tabular arrangement should show a steady increase in values of SOQz2 concentration as one reads down from the top of the table.