Table 4.

Results for a series of one-way ANOVA tests to determine if enrichment factors differ between sector-specific pre-1920 baselines and 2017 and 2018 surface sediments. Table presents the sum of squares and degrees of freedom (d.f.) for the treatment (pre-1920 baseline, 2017 surface sediment, 2018 surface sediment) and error (within-groups) components (respectively), and P values. Statistically significant P values (at alpha = 0.05) are identified in italics

Sector	Metal	Sum of squares	d.f. (treatment, error)	F value	P value
Peace	Be	0.081, 0.582	2, 96	6.7	1.89 × 10−3
	Cd	0.040, 1.494	2, 96	1.29	0.28
	Cr	0.048, 0.085	2, 96	27.0	4.87 × 10−10
	Cu	0.020, 0.264	2, 96	3.64	0.03
	Ni	0.176, 0.375	2, 96	22.6	9.30 × 10−9
	Pb	0.116, 0.721	2, 96	7.76	7.55 × 10−4
	V	0.007, 0.190	2, 96	1.78	0.178
	Zn	0.036, 0.528	2, 96	3.25	0.04
Athabasca	Be	0.152, 0.546	2, 107	14.9	1.96 × 10−6
	Cr	0.012, 0.156	2, 107	4.1	0.02
	Pb	0.043, 0.606	2, 107	3.81	0.02
	V	0.002, 0.215	2, 107	0.57	0.57
	Zn	0.406, 1.148	2, 107	18.9	9.26 × 10−8