Using Lead Concentrations and Stable Lead Isotope Ratios to Identify Contamination Events in Alluvial Soils

Table 3

Lead and heavy metal concentrations and Pb isotopic compositions in soil profile at Windsor site (STE-1).

Depth (cm)	As mg kg^−1	Cd mg kg^−1	Cu mg kg^−1	Pb mg kg^−1	Zn mg kg^−1	^204Pb/^206Pb	^207Pb/^206Pb	^208Pb/^206Pb
0–20	7.20	0.39	23.0	18.75	85.0	0.0549	0.8555	2.0898
20–40	6.76	0.44	29.0	18.32	104.0	0.0553	0.8598	2.1000
40–60	6.78	0.50	34.0	20.31	106.0	0.0553	0.8607	2.0968
60–80	6.45	0.47	31.0	21.47	109.0	0.0554	0.8609	2.0950
80–100	5.88	0.57	36.0	26.38	119.0	0.0560	0.8714	2.1104
100–120	3.01	0.30	22.0	19.89	89.0	0.0556	0.8654	2.1066
120–140	4.68	0.47	28.0	27.96	105.0	0.0555	0.8622	2.0999
140–160	4.24	0.53	28.0	34.70	111.0	0.0562	0.8724	2.1116
160–180	7.16	0.80	44.0	50.82	144.0	0.0559	0.8693	2.1094
Mean	5.79	0.49	31.0	26.51	108.0	0.0555	0.8641	2.1021
S.D	1.48	0.13	6.78	10.57	17.12	0.0004	0.0057	0.0076
Skewness	-0.95	1.17	0.79	1.80	0.92	0.08	0.20	−0.20
Kurtosis	-0.31	2.83	0.78	3.25	1.98	−0.47	−1.18	−1.29
Criterion A [19]	6	1.5	40	50	110	—	—	—
Criterion B	30	5	100	500	500	—	—	—
Criterion C	50	20	500	1500	1500	—	—	—