Mercury Z37.30-1969 10 40 g/m3 g/m3 Styrene Z37.15-1969 100 ppm 200 ppm 600 ppm 5 min. in 3 hr. per. Tetrachloroethylene Z37.22-1967 100 ppm 200 ppm 300 ppm 5 min. in 3 hr. per. Toluene Z37.12-1967 200 ppm 300 ppm 500 ppm 10 min. Trichloroethylene Z37.19-1967 100 ppm 200 ppm 300 ppm 5 min. in 2 hr. per Table Z3 Limits for Air Contaminants. Coumpound Millions of Particles mg/ m3 per cubic foot of air Silica: Crystaline Quartz (Respirable) 10 / (%SiO2 + 2) Quartz (Total Dust) 30 / (%SiO2 + 2) Cristobalite 1/2 Value Calc. for Quartz Tridymite 1/2 Value Calc. for Quartz Amorphous ( incl. natural diatamaceous earth) 80 /(%SiO2) Silicates ( Less than 1% Crystaline) Mica Soapstone 20 Talc (non-asbestos) 20 Portland Cement 20 50 Graphite (Natural) 15 Coal Dust -- Respirable Less than 5% SiO2 2.4 / (%SiO2 + 2) Greater than 5% SiO2 10 / (%SiO2 + 2) Inert or Nuisance Dust Respirable 15 5 Total Dust 50 15 [54 FR 36767, Sept. 5, 1989; 54 FR 41244, Oct. 6, 1989; 55 FR 3724, Feb. 5, 1990; 55 FR 12819, Apr 6, 1990; 55 FR 19259, May 9, 1990; 55 FR 46950, Nov. 8, 1990; 57 FR 29204, July 1, 1992; 57 FR 42388, Sept. 14, 1992; 58 FR 35340, June 30, 1993]
Mercury Z37.30-1969 10 g/m3 40 g/m3 Styrene Z37.15-1969 100 ppm 200 ppm 600 ppm 5 min. in 3 hr. per. Tetrachloroethylene Z37.22-1967 100 ppm 200 ppm 300 ppm 5 min. in 3 hr. per. Toluene Z37.12-1967 200 ppm 300 ppm 500 ppm 10 min. Trichloroethylene Z37.19-1967 100 ppm 200 ppm 300 ppm 5 min. in 2 hr. per Table Z3 Limits for Air Contaminants. Coumpound Millions of Particles per cubic foot of air mg/ m3 Silica: Crystaline Quartz (Respirable) Quartz (Total Dust) Cristobalite Tridymite Amorphous ( incl. natural diatamaceous earth) Silicates ( Less than 1% Crystaline) Mica Soapstone Talc (non-asbestos) Portland Cement 20 20 20 50 10 / (%SiO2 + 2) 30 / (%SiO2 + 2) 1/2 Value Calc. for Quartz 1/2 Value Calc. for Quartz 80 /(%SiO2) Graphite (Natural) 15 Coal Dust -- Respirable Less than 5% SiO2 Greater than 5% SiO2 2.4 / (%SiO2 + 2) 10 / (%SiO2 + 2) Inert or Nuisance Dust Respirable Total Dust 15 50 5 15 [54 FR 36767, Sept. 5, 1989; 54 FR 41244, Oct. 6, 1989; 55 FR 3724, Feb. 5, 1990; 55 FR 12819, Apr 6, 1990; 55 FR 19259, May 9, 1990; 55 FR 46950, Nov. 8, 1990; 57 FR 29204, July 1, 1992; 57 FR 42388, Sept. 14, 1992; 58 FR 35340, June 30, 1993]
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