SIC	Industry Description (1972)	Total # Employees (Male & Female)	Total # Female Employees
16	HEAVY CONSTRUCTION CONTRACTORS	619
28	CHEMICALS AND ALLIED PRODUCTS	4,375	511
29	PETROLEUM AND COAL PRODUCTS	154
30	RUBBER AND MISC. PLASTICS PRODUCTS	505
36	ELECTRIC AND ELECTRONIC EQUIPMENT	1,954	81
37	TRANSPORTATION EQUIPMENT	98
38	INSTRUMENTS AND RELATED PRODUCTS	3,706	2,608
48	COMMUNICATION	356
49	ELECTRIC, GAS, AND SANITARY SERVICES	471
80	HEALTH SERVICES	125	100
TOTAL		12,363	3,300

*(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.