第 1 條

本標準依職業安全衛生法第十二條第二項規定訂定之。

Article 1

These Regulations are promulgated according to Article 12, Paragraph 2 of the Occupational Safety and Health Act.

第 2 條

雇主應確保勞工作業場所之危害暴露低於附表一或附表二之規定。附表一

中未列有容許濃度值之有害物經測出者，視為超過標準。

Article 2

The Employer shall ensure that laborers’ hazard exposure at job site is under the provisions in Attachment 1 or Attachment 2. If the hazardous substances whose permissible exposure limits are not given in Attachment 1 are detected, it shall be deemed as exceeding the standard.

第 3 條

本標準所稱容許濃度如下：

一、八小時日時量平均容許濃度：除附表一符號欄註有「高」字外之濃度

    ，為勞工每天工作八小時，一般勞工重複暴露此濃度以下，不致有不

    良反應者。

二、短時間時量平均容許濃度：附表一符號欄未註有「高」字及附表二之

    容許濃度乘以下表變量係數所得之濃度，為一般勞工連續暴露在此濃

    度以下任何十五分鐘，不致有不可忍受之刺激、慢性或不可逆之組織

    病變、麻醉昏暈作用、事故增加之傾向或工作效率之降低者。

三、最高容許濃度：附表一符號欄註有「高」字之濃度，為不得使一般勞

    工有任何時間超過此濃度之暴露，以防勞工不可忍受之刺激或生理病

    變者。

Article 3

The permissible exposure limits are specified herein as follows:

1.The time weighted average for an 8-hour workday: the 8-hour time weighted average concentration for any substances without designation of "Ceiling" in Attachment 1, to which it is believed that workers may be repeatedly exposed for a daily usual work of 8 hours, without adverse effect.

2.The time weighted average for short term exposure: For any substance without designation of "Ceiling" in Attachment 1 and any substance listed in Attachment 2, the time weighted average for short term exposure shall be calculated by multiplying the "8-hour time weighted average" by an corresponding "Excursion Factor" listed in the following Attachment. This is the concentration to which it is believed that workers can be continuously exposed for any 15 minutes without suffering from irritation, chronic or irreversible tissue damage, or narcosis of sufficient degree to increase accidental injury or reduce work efficiency.

3.Ceiling Permissible Density: An employee's exposure to a substance designated by " Ceiling" in Attachment 1 shall not exceed, at any time during an ordinary 8-hour shift, the Ceiling Permissible Density given for the substance in the Attachment so as to prevent the employee from suffering unbearable irritation or physical impairment.

第 4 條

本標準所稱時量平均濃度，其計算方式如下：

第一次某有害物空氣中濃度ｘ工作時間＋

第二次某有害物空氣中濃度ｘ工作時間＋..

＋第ｎ次某有害物空氣中濃度ｘ工作時間

───────────────────＝時量平均濃度

        總工作時間

Article 4

The time weighted average concentration referred to in the Standard shall be computed as follows:

TWA= C1T1 + C2T2+------+CnTn

Where:

TWA is the time weighted average for the computed working period of (T1+ T2+---+Tn).

Ci is the concentration during any period of time Ti.

Ti is the duration in hours of the exposure at the concentration Ci.

第 5 條

本標準所稱 ppm  為百萬分之一單位，指溫度在攝氏二十五度、一大氣壓

條件下，每立方公尺空氣中氣狀有害物之立方公分數。

Article 5

The ppm referred to herein is one part per million, equivalent to unit cubic centimeter of gaseous hazardous substances in every cubic meter of air at 25℃ and 760 torr.

第 6 條

Article 6

The mg/m^3 referred to herein is the number of "mg" in every cubic meter, equivalent to unit mg of particulate or gaseous hazardous substances in every cubic meter of air at 25℃and 760 torr.

第 7 條

本標準所稱 f/cc 為每立方公分根數，指溫度在攝氏二十五度、一大氣壓

條件下，每立方公分纖維根數。

Article 7

The f/cc referred to herein is the number of fiber in every cubic cm, equivalent to unit number of fiber in every cubic centimeter of air at 25℃ and 760 torr.

第 8 條

勞工作業環境空氣中有害物之濃度應符合下列規定：

一、全程工作日之時量平均濃度不得超過相當八小時日時量平均容許濃度

    。

二、任何一次連續十五分鐘內之時量平均濃度不得超過短時間時量平均容

    許濃度。

三、任何時間均不得超過最高容許濃度。

Article 8

An employee's exposure to any hazardous substances in air of workplace shall be limited in accordance with the following requirements:

1.The time-weighted average of any 8-hour work shift for any substance, which is not designated by "Ceiling", shall not exceed the 8-hour time weighted average limit given for that substance.

2.The time-weighted average of any continuous 15-minute exposure to any substance, which is not designated by "Ceiling", shall not exceed the short -term exposure limit given for that substance.

3.Exposure to any substance, which is designated by "Ceiling", shall not exceed the acceptable ceiling concentration given for that substance.

第 9 條

作業環境空氣中有二種以上有害物存在而其相互間效應非屬於相乘效應或

獨立效應時，應視為相加效應，並依下列規定計算，其總和大於一時，即

屬超出容許濃度。

總和＝

甲有害物成分之濃度      乙有害物成分之濃度

───────────＋───────────＋

甲有害物成分之容許濃度  乙有害物成分之容許濃度

丙有害物成分之濃度

───────────+．．．

丙有害物成分之容許濃度

Article 9

In case of exposure to over 2 kinds of hazardous substances in air of a workplace, whose interaction on a health effect is neither synergistic nor independent, the interact effect shall be deemed as addition and the equivalent exposure shall be computed as follows:

Em=(C1/L1)+(C2/L2)+-----(Cn/Ln)

Where:

Em is the equivalent exposure for the mixture of hazardous substances in air.

Ci is the concentration of a particular substance i.

Li is the exposure limit given for that particular substance i.

Once the sum (Em) exceeds unity (1), the exposure shall be deemed as being exceeded.

第 10 條

本標準不適用於下列事項之判斷：

一、以二種不同有害物之容許濃度比作為毒性之相關指標。

二、工作場所以外之空氣污染指標。

三、職業疾病鑑定之唯一依據。

Article 10

The Standard shall not be used for the judgment of the following matters:

1.Relative index of toxicity between two different hazardous substances.

2.Pollution indices for community air nuisances.

3.Unique basis for the identification of occupational diseases.

第 11 條

本標準自中華民國一百零三年七月三日施行。

本標準修正條文，除第二條附表一編號四、四十三、二百三十一、四百七

十七自中華民國一百零七年七月一日施行外，自發布日施行。

Article 11

These Standards shall take effect on July 3, 2014.

In addition to number 4, 43, 231 and 477 in Attachment 1 of Article 2 of these Standards amended taking effect on July 1, 2018, these amendments of Standards shall be put in force on the date of promulgation.