Table 2.
Time-sheet of filters collected inside the spray chamber.
| Test | Filter Gravimetric PM | Filter SEM |
|---|---|---|
| 1 | Filter 1 | |
| 2 | Filter SEM 1 | |
| 3 | ||
| 4 | Filter 2 | |
| 5 | Filter SEM 2 |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.