175 | | 0.7 + TAM -6 SO2, ppm TAM -5 °.8 | | | 0.8 — TAM -7 0.7 f= 0.6 $02, ppm T MAX 0.5 0.4} 95 TT. t + TAM -8 — _] _I J ~ - MAX = 90 0.2 [- + O.1 b— sd 4 ae 0 7 — = 0.3 — T | 4 L 8 lL 12 HOUR, CST | I6 _| 20 24 95 | RYN EO | 4 | 8 L 12 HOUR, CST | 16 Fig. 137.—Selected percentile curves relating SO2 concentration with time at TAMStations 5-8 | 20 24