Medium

Mercury (Hg)

Arsenic (As)

Soil

0.0001 mg/g THg (US EPA, 2011 & Buchman, 2008)

0.0004 mg/g (USEPA, 2011)

Plant

0.0005 mg/g MeHg (FAO, 2013/WHO)

0.0001 mg/g (FAO, 2013)

Sediment

0.00018 mg/g THg (USEPA, 2006)

0.0098 mg/g (USEPA, 2006)

Water

0.006 mg/L Inorg. Hg (WHO, 2011)

0.0010 mg/g (WHO, 2011)

Fish

0.0003 mg/g MeHg (USEPA, 2011)

0.0005 mg/g MeHg (FAO, 2013)

Tailings

0.0001 mg/g THg (US EPA, 2011 & Buchman, 2008)