SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
15	GENERAL BUILDING CONTRACTORS	1,751
16	HEAVY CONSTRUCTION CONTRACTORS	7,832
17	SPECIAL TRADE CONTRACTORS	737
28	CHEMICALS AND ALLIED PRODUCTS	1,798
32	STONE, CLAY, AND GLASS PRODUCTS	23,506	5,108
33	PRIMARY METAL INDUSTRIES	2,344	72
36	ELECTRIC AND ELECTRONIC EQUIPMENT	479	44
51	WHOLESALE TRADE - NONDURABLE GOODS	1,292
TOTAL		39,740	5,224

*(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.