Environmental Assessment
Volume E-3.9
Tailings Facility
Oceanography
Ambatovy Project
107
January 2006
Table 3.9-2 Suggested target values for the natural marine environment, which
should be used as a monitoring guideline.
Parameter
Recommended target
values within acceptable
variations
Unit
Primary
Producers
Primary
Consumers
Secondary
Consumers
pH
7.3 – 8.5
X
Conductivity
200
uS/cm
Hardness
-
Temperature
+ or – 10C
0C
TSS
Not increase by 10%
above ambient conditions
mg/L
X
Salinty
33 -36
ppt
X
X
Al
5
mg/L
X
X
Sb
-
mg/L
As
0.5
mg/L
X
X
Ba
100 – 550 ug/L – Mussel
embryos
mg/L
X
Be
-
mg/L
Bi
-
mg/L
B
-
mg/L
Cd
0.02
mg/L
X
X
Ca
-
mg/L
Cl
-
mg/L
Co
?: 5 – 10 % variation of
background
mg/L
Cu
0.5
mg/L
X
X
CrT
0.08 – 0.5
mg/L
X
X
F
20
mg/L
Fe
3.5
mg/L
Pb
0.1
mg/L
X
X
X
Li
-
mg/L
Mg
mg/L
Mn
5
mg/L
Hg
0.005
mg/L
X
X
X
Mo
-
mg/L
Ni
0.25
mg/L
X
X
P
2
mg/L
K
-
mg/L
Sc
-
mg/L
Se
0.02
mg/L
X
X
Na
-
mg/L
Si
-
mg/L
SO4
250
mg/L
Te
-
mg/L
Th
-
mg/L
V
0.001
mg/L
Zn
0.5
mg/L
(a)
The table also indicates the trophic level most affected by changes in a particular constituent and thus would most
suitable as monitoring indicators.
