Effects of Nonaqueous Phase Liquids Pollution on the Permeability and Microstructure of In-Filed and Laboratory Soaked Contaminated Clay Soils

Table 5

Summary of changes in apparent characteristics of indoor soaked contaminated samples by TCE (t = 379 days).

Soil layer	N	L (%)	D (cm)	S	The apparent color change of soil samples
Layer (2)	1	1	4.92	0.295	Blackened significantly
Layer (3)	—	3	4.10	0.246	Blackened significantly
Layer (4)	—	—	5.82	0.349	Turn black
Layer (5)	—	—	6.50	0.390	Blackened significantly