**Appendix A**

Table A1 presents information on individual filters. Backup filters, background filters and blanks are excluded from the table. Fuel and engine load identify the test. EGCS indicates that samples are taken downstream of the scrubber. Filter type is indicated, the quartz filters are used for OC/EC analysis as indicated in the table. The OC/EC filters are also gravimetrically analysed although it is not recommended to use these results in further analyses. We have not included these results for calculating specific emissions. The dilution systems used are either a dilution tunnel (DT) or a fine particulate sampler from Dekati (FPS). The FPS gives temperatures at different locations in the dilutor. T1 is measured after primary dilution with heated air, T2 is measured upstream of the second dilution step and T4 is the temperature of the sample leaving the dilutor. The flows of the two dilution steps is also indicated. At measurements downstream of the scrubber (EGCS) the surrounding temperature was reaching above 50 (◦C). It is likely that this was a cause of logging failure of the FPS. DR was continuously checked with trace gas measurements and the Horiba to make sure the dilutor worked though communication and logging suffered. Plausible ranges of sample temperatures are estimated when no log was retrieved from the FPS. These are based on logged values during tests that are adjacent in time. Filter temperatures during dilution tunnel experiments are given as a range based on dilution air temperature when measurements were not logged.

It is indicated in the table which filters that were used for analysis of PMtot, PM1.6, elements, sulphur and OC/EC. The table also presents PM mass concentrations and PM EF calculated from individual filters if applicable.







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