We are checking compliance with standards more strictly.

Activity report: 6. Compliance with legal standard values


Target for 2003 Achievements in 2003
To control discharge concentrations in accordance with voluntary standard values 100% within standard values



Compliance with legal standard values in 2003 is described below:
Strict voluntary standard values are being applied to plant checks.


Legal standard values Voluntary standard values Achievement in 2003 Compliance
Air Pollution Control Law [Particulate] concentration Not exceeding 0.3g/Nm3 Not exceeding 0.27g/Nm3 0.008g/Nm3
Nitrogen oxides 90ppm 81ppm 51ppm
Sulfur oxides (No.3 furnace) Not exceeding 0.62Nm3/h Not exceeding 0.56Nm3/h 0.07Nm3/h
(Nos.1 and 2 furnaces) Not exceeding 1.5Nm3/h Not exceeding 1.35Nm3/h 0.05Nm3/h
Sewerage Law Hydrogen ion concentration (pH) 5.7~8.7 5.9~8.5 6.2~8.0
Normal hexane extracted substances Not exceeding 30mg/L Not exceeding 28mg/L Not exceeding 19mg/L
Trichloroethylene Not exceeding 0.3mg/L Not exceeding 0.15mg/L Lower than 0.03mg/L
Tetrachloroethylene Not exceeding 0.1mg/L Not exceeding 0.05mg/L Lower than 0.01mg/L
Dichloromethane Not exceeding 0.2mg/L Not exceeding 0.1mg/L Lower than 0.02mg/L
Other harmful substances
Not exceeding standard value of discharge
Noise Regulation Law Mitaka Plant Not exceeding 60 dB (Adjacent residential area: Daytime) Not exceeding 59dB

Not exceeding 70 dB (Industrial area: Daytime) Not exceeding 64dB
Saitama Plant Not exceeding 65dB Not exceeding 63dB Not exceeding 59dB
Vibration Regulation Law Mitaka Plant Not exceeding 60 - 65 dB (Residential and industrial area) Not exceeding 46dB
Saitama Plant Not exceeding 65dB Not exceeding 63dB Not exceeding 41dB

* Violation of laws and accidents
No cases have occurred in the past five years.

* Agreement with local community
No agreement has been concluded.


Goals of compliance with legal values in 2004

To control discharge concentrations in accordance with voluntary standard values.


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6.Compliance with Legal Standard Values
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