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ENVIRONMENTAL REPORT
PARAMETERS
BOD 5 a 20°C (mg O
2
/l)
≤
250.00
≤
200.00
≤
500.00
≤
4.00
≤
1.00
≤
0.40
≤
2.00
≤
30.00
≤
30.00
≤
0.60
≤
4.00
≤
10.00
<10.00
12.00
<10.00
0.60
0.13
0.04
<0.05
<1.00
<1.00
0.08
<0.40
<0.50
10.00
<10.00
34.00
<0.20
0.16
0.06
0.05
1.00
1.00
0.30
0.40
<0.50
10.00
<10.00
18.00
0.40
0.13
0.02
<0.05
1.00
1.00
0.12
0.40
<0.50
15.00
<10.00
34.00
<0.20
0.02
<0.01
<0.05
1.00
2.00
0.10
<0.40
<0.10
Total Suspended Solids
Iron
Zinc
Copper
Aluminium
Ammoniacal nitrogen
Nitric nitrogen
Nitrous nitrogen
Total surfactants
Total hydrocarbons
COD (come O
2
) mg O
2
/l
VALUES
2008
2009
2010
2011
LIMITS (mg/l)
The concentration rates detected in wastewater are far lower than the limit established by law, with
levels always below 10% of the limits.
Below are listed the average rates of themain parameters analysed in three points of rainwater discharge.
Concentration rates, expressed inmg/l, are detected inwastewater
of the main parameters compared to the relative law limit.
Average concentration rates, detected in wastewater drainage
derived from the main parameter, in comparison with the law limit
references. Data is expressed in mg/l - n.r. = not revealed.
Suspended materials
≤
80.00
≤
40.00
≤
160.00
≤
2.00
≤
5.00
≤5
0.00
4.80
9.50
37.70
0.70
2.90
/
9.00
10.80
31.90
0.60
1.90
/
4.70
10.70
25.70
0.40
2.40
3.30%
13.30
N.R
23.70
0.30
N.R
6.70%
BOD 5
Total surfactants
Total hydrocarbons
Test of acute toxicity
COD
2008
2009
2010
2011
PARAMETERS
VALUES
LIMITS (mg/l)