Page 447 - Solid Waste Analysis and Minimization a Systems Approach

WASTE MANAGEMENT GOALS AND OPPORTUNITIES 425

Technicians are generally more experienced workers who troubleshoot production
problems and make equipment adjustments and repairs. They take the lead in assuring
quality control and in maintaining equipment. They also test completed chips to make
sure they work properly. To keep equipment repairs to a minimum, technicians perform
diagnostic analyses and run computations. For example, technicians may determine if
a flaw in a chip is due to contamination and peculiar to that wafer, or if the flaw is
inherent in the manufacturing process.

33.2 Waste Management Goals

and Opportunities

The majority of solid waste generated by this sector is paper, plastics, and metals.
Table 33.1 displays the composition breakdown based on survey results.

TABLE 33.1 ELECTRONIC- AND SEMICONDUCTOR-MANUFACTURING
INDUSTRY SOLID WASTE COMPOSITION (SURVEY RESULTS)

MATERIAL COMPOSITION (%) RECYCLING (%)

Paper 28 ± 2.6 16 ± 5.4
Mixed office paper 23 ± 2.4 17 ± 5.8
Newspaper 3 ± 0.4 6 ± 2.0
Paper (other) 2 ± 0.2 0 ± 0.0

Plastics 21 ± 3.5 41 ± 15.2
LDPE 7 ± 2.2 42 ± 15.2
PP 4 ± 1.2 39 ± 15.6
PS 4 ± 1.2 38 ± 14.9
HDPE 3 ± 0.9 42 ± 14.2
PET 3 ± 0.9 41 ± 17.2
Metals 17 ± 4.1 99 ± 13.1
Ferrous metals 11 ± 3.9 99 ± 13.1
Nonferrous metals 4 ± 2.1 99 ± 13.1
Aluminum cans 2 ± 0.8 41 ± 11.0
OCC (cardboard) 8 ± 1.4 71 ± 24.1
Wood 7 ± 1.3 47 ± 16.0

Food waste 6 ± 1.7 0 ± 0.0

Glass 3 ± 0.9 7 ± 2.4
Chemical 1 ± 0.8 14 ± 4.8

Yard waste 1 ± 0.4 0 ± 0.0
Other 8 ± N/A 0 ± 0.0

Overall recycling level 39.2