Chapter III. After-Use Disposition
(Dust Exclusion)
Article 9.
With reference to the exhaust ducts of the manufacturing facilities
by which gases containing dust of group-2 substances are exhausted
or local exhaust ventilation systems by which gases containing dust
of group-1 or group-2 substances are exhausted in accordance with
provisions of Article 3, paragraph 3 of Article 4 or paragraph 1 of
Article 5, the employer shall provide dust exclusion devices in any
one of the systems with performance of dust exclusion as set forth
in the right column of the Table given below, according to the diameters
of dust granules as shown in the left column of the same Table, or
also with dust exclusion devices with the same or better performance
as or than that mentioned above.
2.
The employer shall provide the said dust-exclusion devices, as set
forth in the preceding paragraph, with pre-set dust removers for elimination
of dust granules in large diameter, if necessary.
3.
The employer shall make the said dust-exclusion devices as set forth
in the preceding two paragraphs operate effectively.
Diameter of dust granule
(in unit of microns)
|
Dust exclusion method
|
Less than 5
|
Dust filtration
Electrostatic precipitation
|
5 or more but less than 20
|
Liquid scrubbing
Dust filtration
Electrostatic precipitation
|
20 or more
|
Multi-cyclone dust shields (which
correspond to those in which one cyclone is installed for disposition
of gas in quantity of less than 20m3 per minute)
Liquid scrubbing
Dust filtration
Electrostatic Precipitation
|
Remarks: Diameters of dust granules listed
in the Table correspond to those which are noted at the maximum
frequency in the distribution of diameters of dust as measured
according to the weight method.
|
(Exhaust Gas Disposition)
Article 10.
With reference to the exhaust ducts of the manufacturing facilities
which emit gases or vapours of the substances listed in the left column
in the Table given below or local exhaust ventilation systems installed
in accordance with provisions of paragraph 3 of Article 4 or paragraph
1 of Article 5, the employer shall provide exhaust gas disposition
devices in the method of disposition as described in the right column
of the same Table, or exhaust gas disposition devices with the same
or better performance as or than the said devices.
Substance
|
Disposition method
|
Acrolein
|
Absorption method
Direct combustion method
|
Hydrogen fluoride
|
Absorption method
Absorption method
|
Hydrogen sulfide
|
Absorption method
Oxidation and reduction method
|
Dimethyl Sulfate
|
Absorption method
Direct combustion method
|
2.
The employer shall effectively operate effectively the said exhaust
gas disposition devices as set forth in the preceding paragraph.
(Discharged Fluid Disposition)
Article 11.
In terms of discharged fluid (exclusive of fluid discharged from the
facilities thereby to manufacture group-1 substances), containing
substances listed in the left column of the following Table, the employer
shall provide discharged fluid disposition devices in any one of the
styles for disposition of discharged fluid as described in the right
column of the same Table, or ones with the same or more effective
performance as or than the said devices.
Substance
|
Disposition method
|
Alkyl mercury compounds (restricted
to the substances in which the alkyl radicals are methyl or
ethyl radicals, hereinafter the same)
|
Oxidation-reduction method
|
Hydrochloric acid
|
Neutralization method
|
Nitric acid
|
Neutralization method
|
Potassium cyanide
|
Oxidation-reduction method
Activated sludge method
|
Sodium cyanide
|
Oxidation-reduction method
Activated sludge method
|
Pentachlorophenol (otherwise
known as PCP) and its sodium salts
|
Aggregation-precipitation method
|
Sulfuric acid
|
Neutralization method
|
Sodium sulfide
|
Oxidation-reduction method
|
2. In terms of discharged fluid disposition devices prescribed in
the preceding paragraph, or drainage or pits leading to those devices,
the employer shall provide them in the structure thereby to prevent the
mixture of the following types of discharged fluids when it is feared that
the generation of hydrogen cyanide or hydrogen sulfide may occur by mixing
of discharged fluid containing hydrochloric acid, nitric acid, or sulfuric
acid with discharged fluid containing potassium cyanide, sodium cyanide,
or sodium sulfide.
3. The employer shall effectively operate effectively the discharged
fluid disposition devices as described in paragraph 1.
(Remnants Disposition)
Article 12.
As for remnants that contain alkyl mercurycompounds, the employer
shall not discharge them until he/she has detoxified them.
(Rag Disposition)
Article 12-2. In terms of rags,
paper scraps, etc., contaminated with said specified chemical substances,
etc., the employer shall take measures such as putting the rags, paper
scraps, etc., into impermeable containers coupled with their covers
or stoppers in place thereby to prevent workers from being contaminated
with the said specified chemical substances, etc.
|