Measurement and Monitoring Strategy for Assessing Workplace Exposure to Airborne Nanomaterials - Safety of Nanomaterials along Their Lifecycle - page 234

Tier 1 - data gathering

Can the release of nanoscale particles into
the wrokplace air be reasonably excluded
during production, handling or processing?

Yes

?

No

Tier 2a.1 - screening
(e.g. with CPC)

Tier 2b - permanent monitoring

No Yes

1 Significant increase
or concentration
over background?

? 1

Maybe

Tier 2a.1 - temporary
monitoring

No

No

? 1 ? 1

Yes Yes

Tier 3 - Expert assessment
(e.g. with SMPS, CPC, filter sampler, offline analysis)

No 2

Clear evidence of chemical
identity of the ENM?

?

2 No ENM from activity;
chemical identity of ENM known;
their origin is elsewhere

Yes

Take additional risk management measures to
mitigate exposure

Are risk management measures
efficient?

? Back to tier 2

No

Yes

Document and archive

Check after 2 years or in case of changes

FIGURE 11.1 Flow scheme of the nanoGEM tiered approach for assessing workplace
exposure to airborne engineered nanomaterials.