1. Limonene 4.5ppb O3 20ppb 17.07.2009

2. 09:17 sampling chamber housing air

3. 09:49 during a flush

4. 09:50 reduced the spike in particle number substantially by pushing the lower frame up about 30sec before the flush cycle was due to finish (made sure the bag was operating at a slightly over pressure)

5. 9min ALO (10:19)

6. 20min ALO (mode is growing)

7. 40min ALO

8. 1 HOLA

9. 1h17min ALO another 10ppb Limonene were injected to test the lack of VOC detection by the PTR. The screen shot is at 1h40min ALO The three modes are 30, 47 and 66nm

10. 2h5min ALO

11. 13:34 Lights off (3h15min)