Weekend/Weekday Ozone Observations in the South Coast Air Basin

Table 3.2-5
Day-of-the-Week Variations in Mean NMHC/NOx Ratios by Time of Day for Azusa, Los
Angeles N. Main, Pico Rivera, and Upland for Summer 1999-2000
HOUR (PDT): 00-03 03-06 06-09 09-12 12-15 15-18 18-21 21-24
Azusa
Sunday 3.7 8.4 6.4 6.9 7.8 6.9 5.2 4.4
Monday 5.0 5.1 5.6 7.4 7.3 5.9 5.3 4.6
Tuesday 3.2 5.8 4.7 5.1 5.0 5.7 4.7 4.6
Wednesday 4.7 4.9 4.1 4.8 6.6 6.7 5.0 4.8
Thursday 3.0 4.4 3.5 4.0 5.9 5.3 4.3 6.8
Friday 2.5 4.3 4.3 4.7 6.1 7.6 4.6 4.2
Saturday 2.7 6.5 5.4 5.0 7.4 6.3 5.2 4.5
Los Angeles
Sunday 4.9
Monday 4.6
Tuesday 3.2
Wednesday 3.7
Thursday 4.2
Friday 3.2
Saturday 4.5
Pico Rivera
Sunday 5.3 4.8 5.7 6.1 6.5 5.1 3.9 3.6
Monday 4.6 3.4 3.9 4.4 5.7 5.1 4.3 3.1
Tuesday 2.7 2.9 3.8 4.7 5.9 5.1 3.9 3.3
Wednesday 3.3 2.6 3.4 4.5 5.4 5.2 3.7 3.2
Thursday 3.7 2.2 3.5 4.2 7.9 7.7 4.2 3.3
Friday 3.4 2.7 3.8 4.5 5.4 4.9 3.9 3.6
Saturday 4.4 3.4 4.4 5.4 6.3 5.3 4.4 3.9
Upland
Sunday 3.2 6.5 5.2 5.3 8.1 5.0 3.7 5.5
Monday 7.7 5.8 4.2 4.8 6.5 6.3 4.6 5.0
Tuesday 2.3 4.6 3.5 4.5 4.9 4.9 3.2 5.1
Wednesday 4.8 6.3 4.0 4.5 5.2 6.1 4.8 4.8
Thursday 5.4 4.8 3.8 4.7 6.3 5.0 3.5 4.3
Friday 5.2 6.4 4.4 4.6 5.9 4.8 4.3 4.8
Saturday 4.3 7.4 5.2 5.5 6.6 6.5 4.9 5.2
Mean
Sunday 4.1 6.6 5.5 6.1 7.5 5.7 4.3 4.5
Monday 5.8 4.8 4.6 5.5 6.5 5.8 4.7 4.2
Tuesday 2.8 4.4 3.8 4.8 5.2 5.2 3.9 4.3
Wednesday 4.3 4.6 3.8 4.6 5.7 6.0 4.5 4.3
Thursday 4.1 3.8 3.7 4.3 6.7 6.0 4.0 4.8
Friday 3.7 4.5 3.9 4.6 5.8 5.8 4.2 4.2
Saturday 3.8 5.8 4.9 5.3 6.7 6.0 4.8 4.6
3-17