Working environment measurement

Purpose of Working environment measurement
  • After measuring and assessing how much workers are exposed to harmful factors such as noise, dust, and harmful chemicals that occur during work, a clean working environment is created through proper improvement of facilities, then it contributes to the health protection and productivity improvement of workers
Working environment measurement
  • To protect the health of workers from harmful factors and create a pleasant working environment, the owner shall record and preserve the results and report the results to the Minister of Employment and Labor as provided by the Employment and Labor Ministerial ordinance. In such a case, the representative of the workers shall be present when measuring the work environment as required..
    The owner shall notify the results of the work environment measurement to the workers and take appropriate measures, such as installing, improving facility, or conducting a health examination, to protect the health of the workers.
Target workplace of working environment measurement
  • This refers to a workplace where workers are exposed to harmful factors of work environment measurement in Annex 11, 5 of the Enforcement Rules of the Industrial Safety and Health Act. However, the working environment may not be measured if any of the following:
    1. Temporary work (a temporary work that is performed on a temporary basis is less than 24 hours per month. However, Excludes jobs that are performed monthly for more than 10 hours and less than 24 hours per month) and short-term work sites (except for handling materials that are designated by the Minister of Employment and Labor).
    2. Workplace not exceeding allowable consumption of hazardous substances(only for work environment measurement of hazardous substances
    3. Excluded workplace with dust work(only for work environment measurement of dust
    4. In addition, the level of exposure of hazardous factors in the work environment is significantly lower than the standard of exposure, which is determined by the Minister of Employment and Labor.
  • In the case that a health institution conducts a health examination, When the work environment is measured in accordance with the methods provided by the Minister of Employment and Labor for all harmful factors in the workplace pursuant to Clause 1, the owner may not measure the work environment of the workplace to be performed in the measurement cycle according to Article 42 of the Act.
Measurement cycle of work environment measurers
  • If a workplace becomes a work environment subject to measurement, such as a new operation or change of work process, the work environment shall be measured within 30 days from that date, and the work environment shall be measured regularly at least once every six months thereafter.
※ Change the measurement period if:
More than once every three months In case the carcinogenic substance exceeds the exposure standard or the measurement exceeds more than 2 times of the standard.
More than once a year In case there have been no changes affecting the results of the work environment measurement, such as changes in the process facilities, the method of work, the transfer of the facilities, or changes in the chemicals used (excluding the process for the treatment of carcinogens))
Hazardous Factors Subjected to Work Environment Measurements자
  • 1. Chemical factor
  • Organic compounds (113 types
  • 1) Glutaraldehyde
    2) Nitroglycerin
    3) Nitromethane
    4) Nitrobenzene
    5) p-Nitroaniline
    6) p-Nitrochlorobenzene
    7) Dinitrotoluene
    8) Dimethylaniline, N,N-Dimethylaniline
    9) Dimethylamine
    10) N,N-Dimethylacetamide
    11) Dimethylformamide
    12) Diethanolamine
    13) Diethylene triamine
    14) 2-Diethylaminoethanol
    15) Diethyl ether
    16) Diethylamine
    17) 1,4-Dioxane, Diethyl dioxide
    18) Diisobutylketone
    19) Dichloromethane
    20) o-Dichlorobenzene
    21) 1,2-Dichloroethylene
    22) Dichlorofluoromethane
    23) 1,1-Dichloro-1-fluoroethane
    24) Dihydroybenzene
    25) 2-Methoxyethanol: EGME
    26) 4,4'-Methylene di(bis)phenyl diisocyanate
    27) Methyl amine
    28) Methyl alcohol
    29) Methyl ethyl ketone
    30) Methyl isobutyl ketone
    31) Methyl chloride
    32) Methyl n-butyl ketone
    33) Methyl n-amyl ketone
    34) o-Methyl cyclohexanone
    35) Methyl cylohexanol
    36) Methyl chloroform
    37) Maleic anhydride
    38) Phthalic anhydride
    39) Benzene
    40) 1,3-Butadiene
    41) sec-Butyl alcohol
    42) n-Butyl alcohol
    43) 1-Bromopropane
    44) 2-Bromopropane
    45) Methyl bromide
    46) Vinyl acetate
    47) Carbon tetrachloride
    48) Styrene
    49) Cyclohexanone
    50) Cyclohexanol
    51) Cyclohexane
    52) Cyclohexene
    53) Aniline & homologues
    54) Acetonitrile
    55) Acetone
    56) Acetaldehyde
    57) Acrylonitrile
    58) Acrylamide
    59) Allylglycidylether
    60) Ethanolamine
    61) Ethylbenzene
    62) Ethylamine
    63) Ethyl acrylate
    64) Ethylene glycol dinitrate
    65) 2-Methoxyethyl acetate, EGMEA
    66) 2-Ethoxy ethanol, EGEE
    67) 2-Ethoxyethylacetate, EGEEA
    68)(2-Butoxyethanol, EGBE
    69) Ethylene glycol mono butyl acetate
    70) Ethylene glycol
    71) Ethylene chlorohydrin
    72) Ethyleneimine
    73) 2,3-Expoxy-1-propanol
    74) 1,2-Epoxypropane
    75) Epichlorohydrin
    76) Methyl iodide
    77) Isobutyl alcohol
    78) Isoamyl alcohol
    79) Isopropyl alcohol
    80) Ethylene dichloride
    81) Carbon disulfide
    82) Methyl acetate
    83) n-Butyl acetate
    84) Ethyl acetate
    85) n-Propyl acetate
    86) Isobutyl acetate
    87) Isopropyl acetate
    88) Isoamyl acetate
    89) Cresol, all isomers
    90) Xylene, o,m,p-isomers
    91) Chlorobenzene
    92) 1,1,2,2-Tetrachloroethane
    93) 1,1,2-Trichloroethane
    94) 1,2,3-Trichloropropane
    95) Tetrahydrofuran
    96) Toluene
    97) Toluene-2,4-diisocyanate
    98) Toluene-2,6-diisocyanate
    99) Triethylamine
    100) Trichloromethane
    101) Trichloroethylene
    102) Perchloroethylene
    103) Phenol
    104) Pentachlorophenol
    105) Formaldehyde
    106) Stoddard solvent
    107) Propylene imine
    108) Pyridine
    109) Hydrazine
    110) Hexamethylene diisocyanate
    111) Hexane, n-Hexane
    112) Heptane, n-Heptane
    113) Dimethylsulfate
    114) A preparation containing 1% or more of the substances from 1) to 113).
  • Metals (23 types)
  • 1) Copper
       A) Fume
       B) Dusts and Mists, as Cu
    2) Lead and inorganic compounds, as Pb
    3) Nickel, as Ni
       A) Element
       B) Soluble inorganic compounds
       C) Insoluble inorganic compounds
       D) Nickel carbonyl
    4) Manganese and inorganic compounds, as Mn
    5) Barium and soluble compounds, as Ba
    6) Platinum
       A) Metal
       B) Soluble salts
    7) Magnesium oxide
    8) Selenium and compounds, as Se
    9) Mercury, as Hg
       A) Alkyl compounds)    B) Aryl compounds
       C) Element and inorganic forms
    10) Zinc oxide
       A) Fume
       B) Dust
    11) Antimony and compounds, as Sb
    12) Aluminum and compounds, as Al
       A) Metal Dust
       B) Pyro powders
       C) Fume
       D) Soluble salts
       E) Alkyl, NOS
    13) Iodine
    14) Silver
       A) Metal
       B) Soluble compounds, as Ag
    15) Titanium dioxide
    16) Tin, as Sn
       A) Metal
       B) Oxide & inorganic compounds, except tin hydride
       C) Organic compounds
    17) Zirconium and compounds, as Zr
    18) Iron oxide dust and fume, as Fe
    19) (Cadmium and compounds, Cd
    20) Cobalt and inorganic compounds, as Co
    21) Chromium and inorganic compounds, as Cr
       A) Metal and Cr Ⅲ compounds
       B) Water soluble Cr Ⅵ compounds
       C) Insoluble Cr Ⅵ compounds
    22) Tungsten, as W
       A) Metal and insoluble compounds
       B) Soluble compounds
    23) Vanadium pentoxide
       A) Dust and fume
    24) A preparation containing 1% or more of the substances from 1) to 23)
  • Acid and alkaline (17 types)
  • 1) Formic acid
    2) Hydrogen peroxide
    3) Acetic anhydride
    4) Hydrogen fluoride
    5) Hydrogen bromide
    6) Sodium hydroxide
    7) Potassium hydroxide
    8) Sodium cyanide
    9) Potassium cyanide
    10) Calcium cyanide
    11) Acrylic acid
    12) Hydrogen chloride
    13) Phosphoric acid
    14) Nitric acid
    15) Acetic acid
    16) Trichloro acetic acid
    17) Sulfuric acid
    18) A preparation containing 1% or more of the substances from 1) to 17)
  • Gas condition material (15 species
  • 1) Fluorine
    2) Bromine
    3) Ethylene oxide
    4) Arsine
    5) Hydrogen cyanide
    6) Ammonia
    7) Chlorine
    8) Ozone
    9) Sulfur dioxide
    10) Nitrogen dioxide
    11) Nitric oxide
    12) Carbon monoxide
    13) Phosgene
    14) Phosphine
    15) Hydrogen sulfide
    16) A preparation containing 1% or more of the substances from 1) to 15)
  • Hazardous Substances admitted by Article 30 (12 types)
  • 1) Dichlorobenzidine and its salts
    2) α-naphthylamine and its salts
    3) Zinc chromate, as Cr
    4) o-Tolidine and its salts
    5) Dianisidine and its salts
    6) Beryllium & compounds
    7) Arsenic and inorganic compounds, as As
    8) [Chromite ore processing(chromate), as Cr]
    9) Coal tar pitch volatiles, as benzene soluble aerosol
    10) Nickel subsulfide, as Ni
    11) Vinyl chloride
    12) Benzotrichloride
    13) A preparation containing 1% or more of the substances from 1) to 11)
    14) A preparation containing 0.5% or more of 12) substance
  • Metal-working fluid(1 type
  • 2. Physical factor(2 types
  • Noise above 80 dB of 8 hour time-weighted average
  • High heat according to Chapter 6 of Health and Safety Rules Part III
  • 3. Dust (7 types
  • Mineral dust
  • 1) Silica
       A) Quartz
       B) Cristobalite
       C) Trydimite
    2) Silicates, less than 1% crystalline silica
       A) Mica
       B) Potland cement
       C) Soap stone
       D) Talc, non-asbestiform
       E) Graphite
    3) Particulates
  • Grain dust
  • Cotton dust
  • Wood dust
  • 1) Soft wood
    2) Hard wood
  • Welding fume
  • Glass fiber dust
  • Asbestos dust
  • 4. Other harmful factors designated and declared by the Minister of Employment and Labor
Work environment measurement method
  • Pre-survey must be carried out before measuring work environment
  • Conduct when the work is carried out normally and the worker's exposure to harmful factors can be accurately assessed.
  • All measurements shall be taken using the personal air sampling method (wearing personal air sampler at the respiratory position).
    In case of difficulties in collecting personal sampling, perform a regional sampling method (air sampler fixed in a certain area
    In the above cases, it shall be clearly stated in the result sheet.
  • When a designated measurement institution performs a work environment measurement, the object should provide the necessary information for measuring the work environment, including details of work by process, status of use of chemicals, and material safety and health data
Working environment measurement time
  • Measure continuously for more than 6 hours during the work hours or divide the working hours by equal intervals to measure by continuously separating for more than 6 hours
  • - In case the occurrence time of the target substance is less than 6 hours.
  • - 6 hours or less of work due to irregular job
  • - In case of intermittent occurrence time from source
Number of sampling workers
  • Measure simultaneously the 2 or more maximum exposure workers at the unit workplace. If the same number of workers exceeds 10, measure one more person (one point) per every five employees
    If the number exceeds 100, the maximum sampling workers may be adjusted to 20.
  • Samples according to the regional sampling method is simultaneously measured for two or more at the unit workplace at the same time.
    However, if the area of the unit workplace is 50 square meters or larger, measure one or more additional points every 30 square meters
Actions after measurement
  • Measures to be taken according to the measurement evaluation
Exposure Standard Actions
Below Exposure Standard Maintain the current working condition
Exposure Standard Improve work methods such as opening, facility and provide proper protective gear
Above Exposure Standard Implement improvement measures for opening, facility and provide proper protective gear
Result report
  • The institution performed the work environment measurement shall submit the work environment measurement report to the head of the local employment labor office by electronic method within 30 days after sampling.
Preservation of work environment measurement results
  • Documents that recorded work environment measurement results shall be preserved for five years, but documents that contain records of carcinogenic substances shall be preserved for 30 years.
  • Name of hazardous substances to be preserved for 30 years
  • Dichlorobenzidine and its salts, α-naphthylamine and its salts, Zinc chromate, as Cr, o-Tolidine and its salts, Dianisidine and its salts, Beryllium & compounds, Arsenic and inorganic compounds, as As, Chromite ore processing(chromate), as Cr, Coal tar pitch volatiles, as benzene soluble aerosol, Nickel subsulfide, as Ni, Vinyl chloride, Benzotrichloride, Asbestos, 1, 3-Butadien, Benzene, Saturated carbon, Formaldehyde, Nickel and its compounds(insoluble compoun   D), Antimony and compounds, as Sb, Cadmium and compounds, Cd, Cr Ⅵ compounds, Ethylene oxide

Wearing personal air sampler
for organic solvent

Measuring capture velocity

Measuring Noise

Dose meter & personal air sampler

Measuring Noise and Heavy metals