It has been re- 38 ported that the concentration of Cu was about three times higher than the Grade II guide- 39 line level (Soil Environmental Quality Standard, GB 15618‒1995) in an e‒waste disassem- 40 bly area in China, and the Cu concentrations of soils from dumping, burning, and acid 41 leaching sites were found to be 10, 40, and 60 higher, respectively, than the Grade II level.
It has been re- 38 ported that the concentration of Cu was about three times higher than the Grade II guide- 39 line level (Soil Environmental Quality Standard, GB 15618‒1995) in an e‒waste disassem- 40 bly area in China, and the Cu concentrations of soils from dumping, burning, and acid 41 leaching sites were found to be 10, 40, and 60 higher, respectively, than the Grade II level.