Assessing the direct occupational and public health impacts of solar radiation management with stratospheric aerosols

Table 2 Occupational exposure standards for substances that may be utilized in solar radiation management (Unless otherwise specified, exposure limits are average levels over an 8-h workday)

Substance	U.S Occupational Safety and Health Administration (mg/m³)^a	U.S National Institute for Occupational Safety and Health (mg/m³)^a	American Conference of Governmental Industrial Hygienists (mg/m³)^a
Sulfuric acid	1	1	0.2
Sulfur dioxide	13	5.2	0.7^b
	--	13.1^b	--
Hydrogen Sulfide	27.9^c	13.9^c	1.4
	60.7^d	--	7.0^b
Carbonyl Sulfide	-	-	12.3
Black carbon	3.5	3.5	3
Aluminum aerosol	15	10	1^e
	5^e	5^e	--
Aluminum oxide	15	-	-
	5^e	--
Barium titanate	-	-	-

ISSN: 1476-069X