1. Chamber testing 28.09.2010

2. A/C on

3. Flushed and ran 3 fill/flush cycles Fill complete, A/C still on

4. Slower increase this time but heading towards a similar number

5. Levelled at around 230p/cc

6. Up to 600p/cc by midnight. Could this be related to the change in the bag volume (i.e. the negative pressure in the bag exposing a leak?)

7. Another increase started at 7am reached >1000p/cc by 9am – also very high NOx (92ppb) most of it NO (85ppb) at 9am. However, the NOx could be diffusion related

8. If there really was a leak, then it could only be exposed after about 9 hours of running with CPC, NOx, O3 sampling.