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Concerning the Guidelines for Measures on Smoking in the Workplace

Appendix

In Japanese

Appendix

Measurement Methods, etc., for Air Environments in the Workplace

1. Purpose of Measurement
The airborne dust concentration and carbon monoxide concentration in the air environment in the workplace and the velocity of air flow from a non-smoking area to a designated smoking area, etc., are measured for the purpose of ascertaining the air environment in the workplace prior to the implementation of measures on smoking, and to ascertain and maintain the effectiveness of measures on smoking.

2. Types, etc., of Measurement
Measurements are conducted prior to the implementation of measures on smoking, after the implementation of measures on smoking, and in order to maintain the effectiveness of measures on smoking.

(1)		Measurements Conducted Prior to Implementation of Measures on Smoking Measurements shall be conducted for a room, etc., in which smoking is conducted, on one or more days with normal working conditions. If the number of smokers in the applicable room fluctuates, then measurements shall be conducted on one or more respective days when there are a high number of smokers and low number of smokers.
(2)		Measurements Conducted After Implementation of Measures on Smoking Measurements are conducted after the implementation of measures on smoking in order to verify the effectiveness of the measures. The measurements are conducted inside non-smoking areas and designated smoking areas, etc., and at the boundary between both areas. Furthermore, the velocity of air flow at the boundary between a non-smoking area and a designated smoking area, etc., shall be measured on one or more days with normal working conditions. In addition, if ventilation equipment, etc., is changed after the implementation of measures on smoking, the measurements shall be conducted repeated.
(3)		Measurements Conducted to Maintain Effectiveness of Measures on Smoking Measurements are conducted in order to maintain the effectiveness of measures on smoking. Measurements are conducted inside non-smoking areas and designated smoking areas, etc., and at the boundary between both areas, while the velocity of air flow is measured at the boundary between a non-smoking area and a designated smoking area, etc. These measurements shall be conducted every three months or less, on one or more days designated for measurement, in consideration of the impact, etc., of changes in the room temperature according to the season. Moreover if workers, etc., have requested measurements, measurements shall be conducted as described in (2) above. If the measurements results are favorable for a continuous period of one year or more, the health committee, etc., shall conduct discussions and may reduce the frequency of conducting measurements or discontinue measurements of non-smoking areas, as appropriate.

3. Measurement Frequency
Measurements in offices shall be conducted three or more times during the day, at fixed intervals during normal working hours. It is desirable to conduct these measurements approximately one hour after the start of work, one hour prior to the end of work, and at the mid-point between both times (during working hours).
Furthermore, it is preferable to conduct frequent measurements in order to ascertain changes, etc., over time.
Measurements conducted in designated smoking areas, etc., and non-smoking areas other than offices shall be conducted one or more times while the room, etc., is being used.

4. Measurement Point
The measurement point shall be set at a fixed height approximately 1.2 to 1.5 meters above the floor inside the room, in light of the following aspects: installation of office equipment, etc., in rooms, etc.; type of HVAC equipment; and floor space area, etc. Furthermore, five or more measurement points shall be established per room, except for designated smoking rooms.
The measurement point for the velocity of air flow from a non-smoking area to a designated smoking area, etc., shall be established at three points consisting of upper, middle, and lower points at the main opening between the non-smoking area and the designated smoking area, etc.
If there is an area with a build-up of tobacco smoke or areas where workers, etc., have requested measurements, measurement points other than those described above shall be established.

5. Assessments, etc.
Measurement values from each measurement conducted at each measurement point shall be used to ascertain changes, etc., over time. The workplace shall ensure that the airborne dust concentration is 0.15 mg/m³ or less, the carbon monoxide concentration is 10 ppm or less, and the velocity of air flow from a non-smoking area to a designated smoking area, etc., is 0.2 m/s or higher.
Measurement results shall be recorded for reference using the attached record sheet and kept for a period of three years.

6. Measurement Equipment
The airborne dust concentration shall be measured using a calibrated relative dust concentration detector or spectroscopic dust monitor. The carbon monoxide concentration shall be measured using a detector tube or equipment of equal or better performance. The velocity of air flow shall be measured using a general purpose anemometer. When measuring the airborne dust concentration using a relative dust concentration detector, the measurement shall be conducted over a continuous period of 10 or more minutes at one-minute intervals, and the measurement shall be converted to a concentration based on a mass concentration conversion factor.

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