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Table 1 Township’s heavy metals contamination in soil during 1982-1986 a

From: Cell-type specificity of lung cancer associated with low-dose soil heavy metal contamination in Taiwan: An ecological study

Heavy metals 1982-1986 (TownshipN = 283) TEPA guidelines NYSDEC guidelines
  Q1 Median Q3 Normal land-use Agriculture land-use Unrestricted use Residential use
As (mg/kg) 3.18 6.08 7.70 60 - 0.11 0.21
Cd (mg/kg) 0.03 0.08 0.15 20 5 0.43 0.86
Cr (mg/kg)c < 0.01 0.27 1.23 250 - 29 58
Cu (mg/kg) 3.76 5.98 9.67 400 200 270 270
Pb (mg/kg) 6.25 8.09 11.06 2000 500 200 400
Hg (mg/kg) 0.09 0.15 0.23 20 5 - -
Ni (mg/kg) 1.22 2.07 3.29 200 - 72 140
Zn (mg/kg) 7.35 10.17 14.12 2000 600 1100 2200
  1. a AS, arsenic; Cd, cadmium; Cr, chromium; Cu, copper; Hg, mercury; Ni, nickel; NYSDEC, New York State Department of Environmental Conservation; Pb, lead; TEPA, Taiwan Environmental Protection Agency; Zn, zinc.
  2. cChromium NYSDEC guidelines value is the sum of the hexavalent and trivalent forms.