National Occupational Exposure Survey
(1981 - 1983)

Estimated Numbers of Employees Potentially Exposed to Specific Agents by Occupation within 2-Digit Standard Industrial Classification (SIC)*

Agent Name SILICIC ACID (H4SIO4) , TETRAETHYL ESTER
CAS # 78-10-4
RTECS # VV9450000 
Agent Code X4097

GENERAL BUILDING CONTRACTORS (SIC 15)
Code Occupation Description (1980) Total # Employees
(Male & Female)
Total # Female
Employees
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 319

869 CONSTRUCTION LABORERS 1,714
5
SUBTOTAL 2,033
5
FABRICATED METAL PRODUCTS (SIC 34)
Code Occupation Description (1980) Total # Employees
(Male & Female)
Total # Female
Employees
759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 814

SUBTOTAL 814

MACHINERY, EXCEPT ELECTRICAL (SIC 35)
Code Occupation Description (1980) Total # Employees
(Male & Female)
Total # Female
Employees
215 MECHANICAL ENGINEERING TECHNICIANS 58

216 ENGINEERING TECHNICIANS, N.E.C. 198
52
235 TECHNICIANS, N.E.C. 823
21
453 JANITORS AND CLEANERS 411

757 SEPARATING, FILTERING, AND CLARIFYING MACHINE OPERATORS 268

777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 41

785 ASSEMBLERS 136
21
SUBTOTAL 1,935
94
ELECTRIC AND ELECTRONIC EQUIPMENT (SIC 36)
Code Occupation Description (1980) Total # Employees
(Male & Female)
Total # Female
Employees
213 ELECTRICAL AND ELECTRONIC TECHNICIANS 74
25
216 ENGINEERING TECHNICIANS, N.E.C. 5

453 JANITORS AND CLEANERS 653

675 HAND MOLDERS AND SHAPERS, EXCEPT JEWELERS 17
11
683 ELECTRICAL AND ELECTRONIC EQUIPMENT ASSEMBLERS 561
466
753 CEMENTING AND GLUING MACHINE OPERATORS 289
286
755 EXTRUDING AND FORMING MACHINE OPERATORS 23
8
766 FURNACE, KILN, AND OVEN OPERATORS, EXC. FOOD 123

777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 104
62
785 ASSEMBLERS 822
570
888 HAND PACKERS AND PACKAGERS 123

SUBTOTAL 2,794
1,428
TRANSPORTATION EQUIPMENT (SIC 37)
Code Occupation Description (1980) Total # Employees
(Male & Female)
Total # Female
Employees
215 MECHANICAL ENGINEERING TECHNICIANS 22

216 ENGINEERING TECHNICIANS, N.E.C. 3

224 CHEMICAL TECHNICIANS 37

235 TECHNICIANS, N.E.C. 5

365 STOCK AND INVENTORY CLERKS 3

453 JANITORS AND CLEANERS 82

645 PATTERNMAKERS AND MODEL MAKERS, METAL 40

676 PATTERNMAKERS, LAY-OUT WORKERS, AND CUTTERS 17

703 LATHE AND TURNING MACHINE SET-UP OPERATORS 9

717 FABRICATING MACHINE OPERATORS, N.E.C. 57

753 CEMENTING AND GLUING MACHINE OPERATORS 62
17
755 EXTRUDING AND FORMING MACHINE OPERATORS 51

756 MIXING AND BLENDING MACHINE OPERATORS 6

759 PAINTING AND PAINT SPRAYING MACHINE OPERATORS 14

785 ASSEMBLERS 833
273
797 PRODUCTION TESTERS 147
49
888 HAND PACKERS AND PACKAGERS 6
3
SUBTOTAL 1,394
342
INSTRUMENTS AND RELATED PRODUCTS (SIC 38)
Code Occupation Description (1980) Total # Employees
(Male & Female)
Total # Female
Employees
216 ENGINEERING TECHNICIANS, N.E.C. 78
39
225 SCIENCE TECHNICIANS, N.E.C. 6
3
235 TECHNICIANS, N.E.C. 88
59
785 ASSEMBLERS 436
404
SUBTOTAL 608
505
TRANSPORTATION BY AIR (SIC 45)
Code Occupation Description (1980) Total # Employees
(Male & Female)
Total # Female
Employees
515 AIRCRAFT MECHANICS, EXC. ENGINE 62

777 MISCELLANEOUS MACHINE OPERATORS, N.E.C. 14

SUBTOTAL 76

BUSINESS SERVICES (SIC 73)
Code Occupation Description (1980) Total # Employees
(Male & Female)
Total # Female
Employees
216 ENGINEERING TECHNICIANS, N.E.C. 768
192
SUBTOTAL 768
192
TOTAL 10,422 2,566
RELATED PAGES: Estimates by SIC, Estimates by Occupation

*(1) The estimates for each occupation apply only to the 3- and 4-digit SICs surveyed within the 2-digit SIC where the agent was observed. Not all SICs were surveyed, and not all agents were observed in all surveyed SICs. (2) When using the estimates, standard errors associated with estimates should be considered. (3) 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.

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