Table 1 Concentrations of metals in controls and PVC treatments, determined via ICP-MS (n = 3) at the beginning of the experiment (day 0) and after 6 days of incubation (day 6). The average concentrations are included plus or minus the standard error. Concentrations for the Zn treatments were not included as for these only Zn was measured and was ZnL 0.13 mg/L and ZnH 1.3 mg/L. (*) indicates treatments for which the metal concentration was just above the limit of the detection in one of the samples tested. Bold text indicates metals that were significantly enriched in the 1% and 10% PVC treatments compared to the SW control (pairwise t-test, p < 0.05). For those elements (cobalt and nickel) that were present at detectable levels in the undiluted PVC and 10% PVC but were below the minimum detection limits (MDL) for the SW samples, we used the MDL values for calculations of statistically significant enrichment

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