tcb_roadmap_to__qualitiy_vol1

Qxd 01082006 1052 page 16 64 keep down noise odour

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Unformatted text preview: y find vibration much more intolerable than those who are actually doing the vibration-producing work. 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 Figure Figure 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 conditions 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 might pass. 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 equipment 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 bulb hygrometer with 0.5 scale or an Assmann draft hygrometer, and make necessary adjustment using a dehumidifier or humidifier. Discussion The following questions ask you to think about how the ideas in...
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