Appendix C

(See rule 98)

TABLE – 1

Substance Permissible limits of exposure

weighted average concentration

Short-term Maximum concentration

Aceticacid 10 25 15 37

Acrolein 0.1 0.25 0.3 0.8

Aldrin-sin -- 0.25 -- 0.75

Ammonia 25 18 35 27

Aniline-skin 2 10 5 20

Anisidine(O-pisomers)-skin 0.1 0.5 -- --

Arsenic &Compound (as As) -- 0.2 -- --

Benzene 10 30 -- --

Bromine 0.1 0.7 0.3 2

Butanone (Methlohylketone MEK) 200 590 300 885

n-Butylacetate 150 710 200 950

Sec/tert.Butylacetate 200 950 250 1190

Cadmium -dust and salts (as Cd) - 0.05 00 0.2

Calcium Oxide - 2 -- --

Carbaryl (Selvin) - 5 -- 10

Carbofuran (Furadan) – 0.1 -- --

Carbondisulfide -skin 20 60 -- --

Carbon Monoxide 50 55 400 440

Carbontetrachloride -skin 10 65 20 130

Carbonylchloride (Phosgene) 0.1 0.4 -- --

Chlordane -skin -- 0.5 -- 2

Chlorebenzene (Monochlorbenzene) 75 350 -- -- 358

Chlorine 1 3 3 9

bis-Chloromethyether 0.001 -- -- --

Chromicacid and chromets (as Cr) -- 0.05 -- --

Chromium Sel. Chromic, Chromoussalts (as Cr) 0.5 -- -- --

Copperfume -- 0.2 -- 0.6

Cottondust, raw -- 0.2 -- 0.6

Cresol, all isomers-skin 5 22 -- --

Cyanides (as CN)-skin -- 5 -- --

Cyanogen 10 20 -- --

DDT (Dichlorodiphenyl trichloroethane) -- 1 -- 3

Demeton-skin 0.01 0.1 0.03 0.3

Diazinon-skin -- 0.1 -- 0.3

Dibutyl phthalate -- 5 -- 10

Dichlorves (DDVP)-skin 0.1 1 0.3 3

Dieldrin-skin -- 0.25 -- 0.75

Dinitrobenzene (all isomers)- skin 0.15 1 0.5 3

Dinitrotoluene-skin -- 1.5 -- 5

Diphenyl 0.2 1.5 0.6 4

Endosulfan (Thiodan) – skin -- 0.1 -- 0.3

Endrin-skin -- 0.1 -- 0.3

Ethyl acetate 400 1000 -- --

Ethyl alcohol 1000 1900 -- --

Ethyl amine 10 18 -- --

Flourides (as F) -- 2.5 -- --

Flourine 1 2 2 4

Hydrogen Cyanide-skin 10 11 15 16

Hydrogen Sulfide 10 15 15 27 359

Iron Oxide Fume (Fe2, O2 as Fe) -- 5 -- 10

Isoamyl acetate 100 525 125 655

Isoamyl alcohol 100 360 125 450

Isobutyl alcohol 50 150 75 225

Lead, inorg, fumes and dusts (as pb) -- 0.15 -- 0.45

Lundane-skin -- 0.5 -- 1.5

Malathion-skin -- 10 -- --

Manganese fume (as Mn) -- 1 -- 3

Mercury (alkyl compounds) skin (as Hg) 0.001 0.01 0.003 0.03

Methyl alcohol (Methanol)-skin 200 260 250 310

Methyl cellosolve-skin (2-methoxy ethanol) 25 80 35 120

Methyl isobutyl Ketone-skin 100 410 125 510

Napthalene 10 50 15 75

Nickel carbonyl (as Ni) 0.05 0.35 -- --

Nitric acid 2 5 4 10

Nitric Oxide 25 30 35 45

Nitrobenzene-skin 1 5 2 10

Oil mist-mineral -- 5 -- 10

Parathion-skin -- 0.1 -- 0.3

Phenel-skin 5 19 10 38

Phorate (Thimet)-skin -- 0.05 -- 0.2

Phosgene (Carbonyl chloride) 0.1 0.4 -- --

Phosphine 0.3 0.4 1 1

Phosphorous (yellow) -- 0.1 -- 0.3

Phosphorouspenta chloride -- 1 -- 3

Phosphoroustrichloride 0.5 3 -- -- 360

Picricacid-skin -- 0.1 -- 0.3

Pyridine 5 15 10 30

Silane (Silicontetrahydride) 0.5 0.7 1 1.5

Styrene, monomer (phenylethylene) 100 420 125 525

Sulfurdioxide 5 13 -- --

Sulfuricacid -- 1 -- --

Toluene (toluol)-skin 100 375 150 560

O-Toludine 5 22 10 44

Trichloroethylene 100 535 150 800

Vinylchloride 5 10 -- --

Weldingfumes (Noc) -- 5 -- --

Xylene (o-m-p-isomers)-skin 100 435 150 655

TABLE – 2

Substance Permissible Time - weighted average concentration

1. Silica

(a) Crystalline

(i) Quartz

(1) In terms of dust count 1060 mppcm

%Quarts + 10

(2) In terms of respirable dust 10 mg/m2

% respirable quarts + 2

(3) In terms of total dust 30 mg/m2

%quartz+ 3

(ii) Cristobalite Health limits given against quartz

(iii) Tridymite Health limits given against quartz

(iv) Silica fused Same limit as for quartz

(v) Trippoli Same limit as in formula in item2 given against quartz 361

(b) Amorphous 705mppem

2 Silicate having less than 1% free silica by weight

(a) Asbetos (fibre longer than 5 microne) 2 fibre per cubic centimeter.

(i) Amosite 0.5 fibre/cubic centimeter

(ii) Chrysotile 2 fibre/cubic centimeter

(iii) Crocidolite 0.2 fibre /cubic centimeter

(iv) Other form 2 fibre /cubic centimeter

(b) Mica 705mppem

(c) Mineralwoolfibre 10mg/m3

(d) Porlite 060mppcm

(e) Portlantcement 1060mppcm

(f) Soapstone 705 mppcm

(g) Talc(monabostiform) 705 mppcm

(h) Talc(fibrous) Samelimitasforasbestos

(i) Tromolite Samelimitasforasbestos

(j) Coal Dust

(1) For airborne dust having less than 5% Silicon dioxide by weight - 2 mg/m3

(2) For airborne dust over 5% silicon dioxide - Same limit as prescribed by formula

in item (2) against quartz.

TABLE -3

Substance Permissible limit of exposure

ppm mg/m3

Aceticanhydride 5 20

O-Dichlorobenzene 50 300

Formaldehyde 2 3

HydrogenChloride 5 7

Manganese and Compounds(asMn) -- 5

Nitrogen dioxide 5 9