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find vibration much more intolerable than those who are actually doing the
5. Remember that workplaces that produce noise, odour, or vibration must counter their
impact in the local community just as much as in the workplace. Dust
6. Dust, referred to scientifically as “airborne particles”, is a danger to health and a source
of discomfort. Standardise methods to reduce the levels of dust generated in the
workplace and apply them rigorously:
a. Whenever possible, install a dust catcher at or near the areas where the dust is
created, and collect the dust continuously.
Unit 6 - Hygiene and Health 16 A Roadmap to Quality 05-87581_unit 6.qxd 01/08/2006 10:52 Page 17 b. Use fans to keep the workplace constantly ventilated.
c. Install measuring equipment and take regular measurements.
d. When dust levels are found to exceed the standards, investigate the cause
immediately and prevent this happening again.
e. Employees in shearing and polishing factories should wear dust-proof masks.
One could limit the amount of SPM (suspended particle matter with a diameter of 10
microns or less and which is circulating in the air) to 0.20 mg/litre or less per hour. This
is a common environmental standard, but it is quite lenient when one considers the
consequences of prolonged exposure. Depending on the workplace, particles may be
dispersed. In this case, particles could be greater than 10 microns in diameter and not
be considered SPM.
Figure 6.4a Specifications for the office environment (page 18)
6.4b Specifications for the work site environment
6.4c Specifications for the restroom (page 18)
6.4d Control standard for light, temperature and humidity (page 19) Store products, equipment and tools in suitable environmental
7. Keep environmental factors in mind when storing finished products, machinery,
equipment, jigs, tools, etc. Store them in a way, however, that does not reduce their
functionality nor make it more difficult for employees to handle them.
a. Pay close attention to the temperature, humidity, and dust level in areas where items
are stored. Be especially careful to establish and maintain environmental standards
for items that are prone to rusting or are sensitive to dust.
b. Be careful to prevent leaks where rain might get in, or gaps through which wind
c. Cover items that are stored outdoors with a tarpaulin or sheet.
d. Choose the proper storage location for each type of item, and make sure that
different types do not get mixed up. Use storage addresses so that everyone will
know where items are located.
e. Mark part names, lot numbers etc. clearly on locations and on items to indicate the
item’s history. When controlling items individually, be sure to attach an item card to
each. When controlling items by lot, attach a lot card to the lot.
f. Clean items on a regular basis, as well as at the beginning and end of work. A Roadmap to Quality 17 Unit 6 - Hygiene and Health 05-87581_unit 6.qxd 01/08/2006 10:52 Page 18 Figure 6.4a Specifications for the office environment Example 1 No impediment to the work performed Temperature Standard 200C-250 C Relative humidity Standard 40%-80% Noise 60 phone or less (except under special circumstances) Odor No impediment to the work performed Area 10m2/person or more Openings, for
example Windows Max. opening should be 1/20th of the floor area or
more Degree of purity of
air supply Airborne particles (about 10 microns or less) should
be limited to 0.15 mg/m3 or less Air current 0.5m/s or less Temperature 170C-280C Relative humidity 40%-70% Light 150 lux or more Noise 60 phone or less. In the case where five or more
typewriters, etc., are used, provide an exclusive room
and establish noise insulation equipment. Odor Example 2 Brightness No notable odor Figure 6.4c Specifications for the restroom Example Separation Separate for male and female Male toilet At least 1 per 60 people Male urinal At least 1 per 30 people Female toilet At least 1 per 20 people Unit 6 - Hygiene and Health 18 A Roadmap to Quality 05-87581_unit 6.qxd 01/08/2006 10:52 Page 19 Figure 6.4d Control standard for light, temperature and humidity
Light Standard Control method Remarks For detailed work
300 lux or more.
For normal work
150 lux or more.
For rough work
70 lux or more. Inspect lighting
every six months Preferable ratio of overall
light to directed light is 1/10 or
less. Temperature Greater than 17oC
not more than 28oC When temperature is
10oC or less, provide
a heater. When
temperature is 28oC
or more, provide
an air conditioner. When using an air
conditioner, the temperature
difference between the
interior and exterior
should be 7oC or less. Relative
Humidity Greater than 40%
but not more than
70% Take measurements
using a wet-and-dry
with 0.5 scale or an
adjustment using a
or humidifier. Discussion
The following questions ask you to think about how the ideas in...
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- Spring '12