|
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
|
-
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.
-
cChromium NYSDEC guidelines value is the sum of the hexavalent and trivalent forms.
