DAEHAN Environment Engineering CO., LTD.

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.

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

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