The manuscript has improved substantially after the revision based on reviewers’ comments. I think the authors have adequately addressed the reviewers’ concerns. I have some additional comments that I would like the authors to clarify/address prior to the publication of this manuscript:

1. Page 5 line 147. The recovery for the lowest mass is biased high while that for the higher mass is biased low. How could these potentially affect data analysis and conclusions of the manuscript?

2. Page 7 line 210. It seems like “OC” should actually be “organic vapor”?

3. Page 7 line 223. If the field analyzer only collected data for ¾ of the 24 hour period, could this be a reason for the low OC values as compared to Partisol-OC and HV-OC as well?

4. Page 8 line 250-251. The authors suggested that the higher OC in winter is due to pollutants transported into the MK area from elsewhere. The authors need to provide a reasonable as to how they can rule out any possible additional local OC sources in winter.

5. Page 8, line 255. The authors wrote: “The difference of OC concentrations between weekdays and holidays were more significant in summer than the other seasons”. What is the basis for this statement? Are the authors just referring to an average value? From the data in Figure 5 I don’t think this statement is well-justified. It seems that the difference is the largest (or “consistent”) for “Jan 2012”. This would affect subsequent discussions in this paragraph. Please explain.

6. Page 9 line 257-258. Please provide citation (s) for this statement.

7. Page 9 line 280. What is the source of the large ozone peak at night (4am)? I understand that it can decrease in early morning because of titration by NO. But it is not clear why there is an increase from midnight to 4am. Please explain. I agree with Reviewer 2 that comparing OC to ozone here might not be as informative. Do the authors have sulfate data? That might be a better indication of secondary chemistry.

8. Page 9 line 284. As photochemical activities should be stronger in summer, if the first OC peak is from SOA, one would expect the peak to be larger in summer than winter. But from Figure 5, it seems that the OC peak is stronger in winter than summer?

Technical comments
1. Page 2 line 55-56. Sentence not clear.
2. Page 5 line 143, need a space between 0.60 and ug/m3.
3. Page 7 line 241-243. Sentence not clear.
4. Page 30. Need to add “EC” to y-axis label.
5. Page 31. Please use a different color for NOx (so that it’s not similar to OC to avoid confusion).