This page has been validated.
- 3.4.2 Small-scale Weighing and Handling of Nanopowders................................................................................................................................................................................................................................................................................................................................................................................................
30
- 3.4.2.1 Fume Hood Enclosures................................................................................................................................................................................................................................................................................................................................................................................................
31
- 3.4.2.2 Biological Safety Cabinets................................................................................................................................................................................................................................................................................................................................................................................................
33
- 3.4.2.3 Glove Box Isolators................................................................................................................................................................................................................................................................................................................................................................................................
34
- 3.4.2.4 Air Curtain Fume Hood................................................................................................................................................................................................................................................................................................................................................................................................
35
- 3.4.2.5 Summary................................................................................................................................................................................................................................................................................................................................................................................................
36
- 3.4.3 Intermediate and Finishing Processes................................................................................................................................................................................................................................................................................................................................................................................................
37
- 3.4.3.1 Product Discharge/Bag Filling................................................................................................................................................................................................................................................................................................................................................................................................
38
- 3.4.3.2 Bag Dumping/Emptying................................................................................................................................................................................................................................................................................................................................................................................................
41
- 3.4.3.3 Large-scale Material Handling/Packaging................................................................................................................................................................................................................................................................................................................................................................................................
43
- 3.4.3.4 Nanocomposite Machining................................................................................................................................................................................................................................................................................................................................................................................................
44
- 3.4.3.5 Summary................................................................................................................................................................................................................................................................................................................................................................................................
44
- 3.4.4 Maintenance Tasks................................................................................................................................................................................................................................................................................................................................................................................................
45
- 3.4.4.1 Filter Change-out—Bag In/Bag Out Systems................................................................................................................................................................................................................................................................................................................................................................................................
46
- 3.4.4.2 Spill Cleanup Procedures................................................................................................................................................................................................................................................................................................................................................................................................
46
- ................................................................................................................................................................................................................................................................................................................................................................................................
47 - 4.1 Approaches to Evaluation................................................................................................................................................................................................................................................................................................................................................................................................
47
- 4.1.1 Identification of Emission Sources................................................................................................................................................................................................................................................................................................................................................................................................
47
- 4.1.2 Background and Area Monitoring................................................................................................................................................................................................................................................................................................................................................................................................
47
- 4.1.3 Air Monitoring and Filter Sampling................................................................................................................................................................................................................................................................................................................................................................................................
48
- 4.1.4 Assessment of Air Velocities and Patterns................................................................................................................................................................................................................................................................................................................................................................................................
50
- 4.1.5 Facility Sampling and Evaluation Checklist................................................................................................................................................................................................................................................................................................................................................................................................
52
- 4.2 Evaluating Sources of Emissions and Exposures to Nanomaterials................................................................................................................................................................................................................................................................................................................................................................................................
57 - 4.2.1 Direct-reading Monitoring................................................................................................................................................................................................................................................................................................................................................................................................
57
viii
Current Strategies for Engineering Controls in Nanomaterial Production and Downstream Handling Processes
