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Highly flammable liquids and gases 1[THE SECOND SCHEDULE] (SEE SECTION 41F) PERMISSIBLE LEVELS OF CERTAIN CHEMICAL SUBSTANCES IN WORK ENVIRONMENT Substance Permissible limits of exposure Sr. No. Time Weighted average Concentration (TWA) (8 hrs.) Short-term exposure limit (STEL) (15 min.)* ppm mg/m3 ppm mg/m3 1 2 3 4 5 6 1 Acetaldehyde 100 180 150 270 2 Acetic Acid 10 25 15 37 3 Acetone 750 1780 1000 2375 4 Acrolein 0.1 0.25 0.3 0.8 5 Acrylonitrile-skin (S.C.) .2 4.5 - - 6 Aldrin-skin - 0.25 - - 7 Allylchloride 1 3 2 6 8 Ammonia 25 18 35 27 9 Aniline-skin 2 10 - - 10 Anisidine (o-P, isomers)-skin 0.1 0.5 - - 1 Subs. by S.O. 170 (E), dated 2nd March, 1989. Schedule The Factories Act, 1948 63 Substance Permissible limits of exposure Sr. No. Time Weighted average Concentration (TWA) (8 hrs.) Short-term exposure limit (STEL) (15 min.)* ppm mg/m3 ppm mg/m3 1 2 3 4 5 6 11 Arsenic & soluble compounds (as As) - 0.002 - - 1[12 Benzene (HC) 05 1.5 25 7.5] 13 Beryllium & Compound (as Be) (S.C.) - 0.002 - - 14 Boronon Trifluoride-C 0.1 0.3 - - 15 Bromine 0.1 0.7 0.3 2 16 Butane 800 1900 - - 17 2-Butanone (Methyl-ethyle Ketone- MEK) 200 590 300 885 18 n-Butyl acetate 150 710 200 950 19 n-Butyl alcohol-skin C 50 150 - - 20 sec/tert.Butyl acetate 200 950 - - 21 Butyl Mercaptan 0.5 1.5 - - 22 Cadmium Dust and salts (as Cd) - 0.05 - - 23 Calcium oxide - 2 - - 24 Carbaryl (sevin) - 5 - - 25 Carbofuran (Furadan) - 0.1 - - 26 Carbon-disulphide-skin 10 30 - - 27 Carbon monoxide 50 55 400 440 28 Carbon tetrachloride-skin (S.C.) 5 30 - - 29 Chloridane-skin - 0.5 - - 30 Chlorine 1 3 3 9 31 Chlorobenzene (monochlorobenzene) 75 350 - - 32 Chloroform (S.C.) 10 50 - - 33 bis-Chloromethyl ether (H.C.) 0.001 0.005 - - 34 Chromic acid and chromates (as Cr) (Water Soluble) - 0.05 - - 35 Chromous Salts (as Cr) - 0.05 - - 36 Copper fume - 0.2 - - 37 Cotton dust, raw2 - 0.23 - - 38 Cresol, all isomers-skin 5 22 - - 39 Cyanides (as CN)-skin - 5 - - 40 Cyanogen 10 20 - - 1 Subs. by S.O. 342 (E), dated 19th April, 2001 (w.e.f. 19-4-2001). 2 Lint-free dust as measured by the vertical clutricator cotton-dust sampler. 3 Lint-free dust as measured by the vertical clutricator cotton-dust sampler. 64 The Factories Act, 1948 Schedule Substance Permissible limits of exposure Sr. No. Time Weighted average Concentration (TWA) (8 hrs.) Short-term exposure limit (STEL) (15 min.)* ppm mg/m3 ppm mg/m3 1 2 3 4 5 6 41 DDT (Dichlorodiphenyl tri- chlorothane) - 1 - - 42 Demeron-skin 0.01 0.1 - - 43 Diazinon-skin - 0.1 - - 44 Dibutyl Pythalate - 5 - - 45 Dichiorvos (DDVP)-skin 0.1 1 - - 46 Dieldrin-skin 0.25 - - - 47 Dinitrobenzene (all isomers)-skin 0.15 1 - - 48 Dinitrotoluene-skin - 1.5 - - 49 Diophenyl (Biphenyl) 0.2 1.5 - - 50 Endosulfan (Thiadon)-skin - 0.1 - - 51 Endrin skin - 0.1 - - 52 Ethyl acetate 400 1400 - - 53 Ethyl alcohol 1000 1900 - - 54 Ethylamine 10 18 - - 55 Fluorides (as F) - 2.5 - - 56 Flourine 1 2 2 4 57 Formaldehyde (S.C.) 1.0 1.5 - - 58 Formic acid 5 9 - - 59 Gasoline 300 900 500 1500 60 Hydrazine-skin (S.C.) 0.1 0.1 - - 61 Hydrogen Chloride-C 5 7 - - 62 Hydrogen Cyanide-skin –C 10 10 - - 63 Hydrogen Flouride (as F) –C 3 2.5 - - 64 Hydrogen Peroxide 1 1.5 - - 65 Hydrogen Sulphide 10 14 15 21 66 Iodine-C 0.1 1 - - 67 Iron Oxide Fume (Fe2O3) (as Fe) - 5 - - 68 Isoamyl acetate 100 525 - - 69 Isoamyl alcohol 100 360 125 450 70 Isobutyl alcohol 50 150 - - 71 Lead, inorg dusts and fumes (as Pb) - 0.15 - - 72 Lindane-skin - 0.5 - - 73 Malathion-skin - 10 - - 74 Manganese dust and compounds (as Mn)-C - 5 - - Schedule The Factories Act, 1948 65 Substance Permissible limits of exposure Sr. No. Time Weighted average Concentration (TWA) (8 hrs.) Short-term exposure limit (STEL) (15 min.)* ppm mg/m3 ppm mg/m3 1 2 3 4 5 6 75 Manganese Fume (as Mn) - 1 - 3 76 Manganese (as Hg)-Skin- (i) Alkyl compounds - 0.01 - 0.03 (ii) All forms except alkyl vapour - 0.05 - - (iii) Aryl and inorganic compounds - 0.1 - - 77 Methyl alcohol(Methanol)-Skin 200 260 250 310 78 Methyl Cellosolve- (2 Methoxy ethanol) Skin 5 16 - - 79 Methylisobutyl Ketone-skin 50 205 75 300 80 Methyl Isocyanate-Skin 0.02 0.05 - - 81 Naphthalene 10 50 15 75 82 Nickel carbonyl (as Ni) 0.05 0.35 - - 83 Nitric acid 2 5 4 10 84 Nitric oxide 25 30 - - 85 Nitrobenzene-skin 1 5 2 10 86 Nitrogen dioxide 3 6 5 10 87 Oil mist, minerals - 5 - 10 88 Ozone 0.1 0.2 0.3 0.6 89 Parathion-skin - 0.1 - - 90 Phenol-skin 5 19 - - 91 Phorate (Thimet)-skin - 0.05 - 0.2 92 Phosgene (Carbonyl Chloride) 0.1 0.4 - - 93 Phosphine 0.3 0.4 1 1 94 Phosphorus acid - 1 - 3 95 Phosphorus (yellow) - 0.1 - - 96 Phosphorus pentachloride 0.1 1 - - 97 Phosphorus trichloride 0.2 1.5 0.5 3 98 Picric acid-skin - 0.1 - 0.3 99 Pyridine 5 15 - - 100 Silane (silicon tetrahydride) 5 7 - - 101 Sodium hydroxide –C - C2 - - 102 Syrene, monomer (Phenylethylene) 50 215 100 425 103 Sulphur dioxide 2 5 5 10 104 Sulphur hexafluoride 1000 6000 - - 105 Sulphuric acid - 1 - - 106 Tetraethyl lead (as Pb)-Skin - 0.1 - - 66 The Factories Act, 1948 Schedule Substance Permissible limits of exposure Sr. No. Time Weighted average Concentration (TWA) (8 hrs.) Short-term exposure limit (STEL) (15 min.)* ppm mg/m3 ppm mg/m3 1 2 3 4 5 6 107 Toluene (Toluol) 100 375 150 560 108 O-Tuluidinz-skin (S.C.) 2 9 - - 109 Tributyl phosphate 0.2 2.5 - - 110 Trichloroethylene 50 270 200 1080 111 Uranium, natural (as U) - 0.2 - 0.6 112 Vinyl chloride (H.C.) 5 10 - - 113 Welding fumes - 5 - - 114 Xylene (o-,m, P-isomers) 100 435 150 655 115 Zinc oxide (i) Fume - 5.0 - 10 (ii) Dust (Total dust) - 10.0 - - 116 Zironium compounds (as Zr) - 5 - 10 Ppm Parts of vapour or gas per million parts of contaminated air by volume at 250C and 760 toor (mm of mercury) MG/M3 Milligram of substance per cubic metre of air * Not more than 4 times a day with at least 60 min. interval between successive exposures ** Molecular weight mg/m3 _________________ x ppm 24.45 C denotes ceiling limit Skin denotes potential contribution to the overall exposure by the cutaneous route including mucous membranes and eye S.C. denotes suspected human carcinogens H.C. denotes confirmed human carcinogens. Substance Permissible time-weighted average concentration (TWA) (8 hours) (i) Silica (a) Crystalline (i) Quartz (1) In terms of dust count 10600__mppcm % Quartz+10 (2) In terms of respirable dust 10__mg/m3 % respirable quartz + 2 Schedule The Factories Act, 1948 67 Substance Permissible time-weighted average concentration (TWA) (8 hours) (3) In terms of total dust 30__ mg/m3 % Quartz + 3 (ii) Cristabalite Half the limits given against quartz (iii) Tridymite Half the limits given against quartz (iv) Silica fused Same limit as for quartz (v) (a) Tripoli Same limit as in formula in item 2 given against quartz (b) Amorphous Silicates 10 mg/m3, Total dust 1[Asbestos (H.C.) (a) Amosite 0.5 fibre/ cc** (b) Chrystolite 1.0 fibre/ cc** (c) Crocidolite 0.2 fibre/ cc** Portland cement 10 mg/m3, Total dust containing less than 1% quartz Coal Dust 2 mg/m3, respirable dust fraction containing less than 5% quartz Mppcm- Million particles per cubic metre of air based on impinger samples counted by light-field techniques. *** (i) For fibres greater than 5 um in length and less than 5 um in breadth with length to breadth ratio equal to or greater than 3:1 (ii) As determined by the membrane filter method at 4000-450x magnification (4mm objective) phase contrast illumination.] *As determined by the membrane-filter method at 400-450 x magnification (4 mm objective) phase contrast illumination. Respirable Dust: Fraction passing a size-selector with the following characteristics:- Aerodynamic Diameter *(um) % passing sector (Unit density sphere) < 2 90 2.5 75 3.5 50 5.0 25 10 0] 2[THE THIRD SCHEDULE] [SEE SECTIONS 89 and 90] LIST OF NOTIFIABLE DISEASES