SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
28	CHEMICALS AND ALLIED PRODUCTS	4,893	780
30	RUBBER AND MISC. PLASTICS PRODUCTS	381
33	PRIMARY METAL INDUSTRIES	318
35	MACHINERY, EXCEPT ELECTRICAL	1,765
38	INSTRUMENTS AND RELATED PRODUCTS	221	165
75	AUTO REPAIR, SERVICES, AND GARAGES	302
TOTAL		7,879	945

*(1) By survey design, not all 2-digit SICs were surveyed. (2) The estimates for each 2-digit SIC apply only to the 3- and 4-digit SICs surveyed within the 2-digit SIC. Not all SICs were surveyed. (3) When using the estimates, standard errors associated with estimates should be considered. (4) Potential exposures to a chemical agent are categorized as actual (i.e., the surveyor observed the use of the specific agent) or tradename (i.e., the surveyor observed the use of a tradename product known to contain the specific agent). The estimates presented in the table combine both categories.