Table 1.

Metal concentrations (mg kg⁻¹ dry weight), Microtox Soil Toxicity (MST) values (mg L⁻¹) and soil pH for Areas A (n=60 for metals, 120 for MST), B (n=114), and C (n=119), EPA residential Preliminary Remediation Goals (R-PRG; mg kg⁻¹) and ANOVA p-values.

	Area Aa			Area B			Area C			EPA R-PRG	ANOVAc p-value
	Conc. Range	Mean	Quartile Rangeb	Conc. Range	Mean	Quartile Range	Conc. Range	Mean	Quartile Range
As	0–6.4	1.3	0.7–1.6	0–7.4	0.97	0–1.3	0.66–42.1	4.1	2.3–3.7	0.39	<0.0001*
Ba	2.1–210	20	7.3–23	1.8–35	13	7.1–18	8.4–328	73	31–89	5400	<0.0001*
Be	0–1.4	0.13	0–0.15	0–0.32	0.004	0-0	0–17.8	0.15	0–0	150	0.53
Cr	1–89	7	2.1–6.4	0–33	4.4	2.3–4.7	3.7–120	24	12–30	210	<0.0001*
Cu	0.45–23	3.2	1.2–3.5	0–52	3	0.86–2.8	3.1–204	17	8.6–19	3100	<0.0001*
Pb	2.1–53	12	5.1–14.3	1.6–140	17	6.9–19	2.4–288	45	15–55	400	<0.0001*
Mn	2.7–1600	86	10–62	0–120	22	6.1–25	32.7–1040	260	140–340	1800	<0.0001*
Ni	0–21	1.8	0.65–1.5	0–11	0.86	0–1.2	0–45.7	6.4	2.6–6.9	1600	<0.0001*
Hg	0–0.12	0.03	0.02–0.04	0–0.06	0.022	0.014–0.03	0–0.22	0.023	0–0.03	23	0.06
MST	NAd	NA	NA	3.8–5.59	4.66	4.41–4.88	3.89–5.28	4.56	4.34–4.79	NA	0.03*
Initial pH	NA	NA	NA	3.04–7.4	4.26	3.76–4.58	4.13–7.3	5.8	5.37–6.25	NA	<0.0001*

^aAelion et al. (2008);

^b25^th percentile to 75^th percentile range;

^cANOVA comparisons of MST and pH for Areas B and C only;

^dNot applicable;

^*Denotes significant difference