SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
15	GENERAL BUILDING CONTRACTORS	196
17	SPECIAL TRADE CONTRACTORS	7,279
28	CHEMICALS AND ALLIED PRODUCTS	257	43
33	PRIMARY METAL INDUSTRIES	277
34	FABRICATED METAL PRODUCTS	1,882
49	ELECTRIC, GAS, AND SANITARY SERVICES	933
51	WHOLESALE TRADE - NONDURABLE GOODS	666
TOTAL		11,490	43

*(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.