Figure 3.
The level of PFAAs in soil samples from Shandong (SD), Sichuan (SC) and Liaoning (LN) provinces. The odd numbers represent the top soil and the even ones represent the deep soil for SC and LN.
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.