I find that this manuscript is now ready for publication in ACP.

I suggest a few small changes:

I find the use of ‘homogeneous nucleation’ throughout the text a bit confusing. If I understand your meaning, you are trying to distinguish these small particles that arise from production within the atmosphere from those that might arise from primary emissions (e.g. sea spray). In this case, I suggest that ‘new particle formation’ might be more clear.

Figure 3 needs a legend or some explanation of the colour code.

The very small p-values reported in Figures 6 and 7 are probably unnecessarily detailed. I think it would be less distracting to simply state p < 0.001 for each panel where appropriate. The r2 value also have too many significant figures.

It’s unclear to me what is being conveyed by the last sentence in section 4 “These hydrocarbons would need to be volatilized and oxidized in order to source the benzoic acid which appears to be involved in particle nucleation and growth.” Do you mean ‘in order to be the source of benzoic acid’?

Supplemental
Paragraph 1 –site scanning should be size scanning