Table 3.

Summary statistics and geostatistical parameters for degree of contamination

Contamination assessment
Summary statistics	Mean	Median	SD	Minimum	Maximum	CV	Skewness	Kurtosis
	158.68	63.21	222.42	3.36	968.01	1.41	2.13	4.14
Spatial autocorrelation	MI	EV	Variance	Z-score	p-value	DT
	0.175	-0.008	0.006	2.362	0.02	500
Geostatistical characteristics	Model	Nugget (Co)	Sill (C1)	Co/C1	Range
	Spherical	0.219	1.022	0.214	851.49
	Exponential	0.288	0.911	0.317	1057.40
	Gaussian	0.350	0.898	0.390	712.01
	K-Bessel	0.344	0.916	0.375	753.10

SD, standard deviation; CV, coefficient of variation; MI, Moran index; EV, error variance; DT, distance threshold.