(Supplementary explanation to the details listed) Tables have been prepared from the measurement data for the period from April 2000 through March 2001.
Water Quality
Items given are those for which measurements are compulsory under the Water Pollution Control Law and the Bylaws of the Local Government Authorities
The listed data have been obtained by statistically processing the monthly data. For other substances that are not listed, measurements are carried out on an ongoing basis to check that they are equal to or below the regulation values.
Air Quality
Items given are those for which measurements are compulsory under the Air Pollution Control Law and the Bylaws of the Local Government Authorities
The equipment concerned includes boilers, drying ovens, incinerators, etc.
Saitama Factory Wako Plant
Address: Wako City, Saitama Prefecture
Main Products : Automobiles
Number of employees : 1,176
Water Quality
Item
Regulation Values
(Incl. agreed values)
Measurement values
Maximum (minimum)
Average
Hydrogen ion concentration (pH)
5~9
7.9(6.3)
7.4
Biochemical oxygen demand (BOD)
600
290
138
Suspended solids (SS)
600
150
51
Oil content
5
1.3
7.4
Cyanides
1
Below detection limit
Below detection limit
Unit : mg/ (except for pH)
Discharged into the public sewage system
Air Quality
Item
Regulation Values
(Incl. agreed values)
Measurement values
Maximum (minimum)
Average
Particulate
0.1
Below detection limit
Below detection limit
0.2
0.016
0.016
Nitrogen oxides
130
96
91
180
30
30
Particulate : g/Nm3, Nitrogen oxides : ppm
Note) Hydrogen chloride,sulfur oxides and dioxins are not applicable since incinerators have been abolished.
Saitama Factory Sayama Plant
Address: Sayama City, Saitama Prefecture
Main Products : Automobiles
Number of employees : 4,510
Water Quality
Item
Regulation Values (Incl. agreed values)
Measurement values
Maximum (minimum)
Average
Hydrogen ion concentration (pH)
5~9
7.7(6.2)
6.7
Biochemical oxygen demand (BOD)
600
350
207
Chemical oxygen demand (COD)
---
200
158
Suspended solids (SS)
600
32
18
Oil content
30
16
9.2
Copper content
3
Below detection limit
Below detection limit
Zinc content
5
0.6
0.2
Soluble iron content
10
Below detection limit
Below detection limit
Soluble manganese content
10
1.7
1.1
Chromium content
2
0.06
0.005
Cadmium and its compounds
1
Below detection limit
Below detection limit
Lead and its compounds
0.1
0.02
0.01
Chrominum (VI) compounds
0.5
Below detection limit
Below detection limit
Fluorine content
15
6.9
1.7
Nitrogen content
240
25
25
Phosphorus content
32
15
6.8
Cyanides
1
Below detection limit
Below detection limit
Unit : mg/ (except for pH)
Discharged into the public sewage system
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Saitama Factory Wako Plant
