Experiment Hazard Class 14.2 – Engineered Nanomaterials - Liquid Suspension

Applicability

This hazard classification applies to all experiments involving the use of engineered nanomaterials that are in liquid suspension as samples. Other hazard classifications and their associated hazard controls may also apply to experiments in this hazard class due to the liquid used for the suspension. Any sample preparatory work with dispersable nanomaterials will require additional controls beyond those described in this hazard class (See Experiment Hazard Class 6.8c) and additional review. As with all potentially hazardous materials the quantity needed at the beamline should be kept to a minimum for the experiment. These guidances are not sufficient for handling active nanomaterials or entities. A more detailed review would be required.

Experiment Category

Experiments in this Experiment Hazard Class are always categorized as Medium Risk.

Hazard Control Verification Statements

Engineered Controls – Controls required in LMS-PROC-83, "Safe Handling of Engineered Nanomaterialsand any agreed upon in the review of the experiment by APS and Beamline Management. General ventilation is sufficient for these materials. Handling a suspended nanomaterials or carrying out processes in sealed vessels that isolate workers from contact with engineered nanoparticles might require no additional safeguards during normal operations. However, maintenance operations on normally sealed vessels or ventilation systems may create hazards requiring exposure of controls. Control of skin contact and mist inhalation should be addressed for suspensions of nanoparticles in fluids.

Procedural Controls – No special procedural controls are required.

Design Reviews and Equipment Inspections – Any experiments involving loose nanomaterials in containment will require a review of the proposed containment to determine if it can withstand the x-ray beam.

Training – ESH590, Engineered Nanomaterials Orientation.

Signs and Labeling – Containers with nanomaterials must be labeled "Caution - Engineered Nanomaterials".

Personal Protective Equipment – Gloves and safety glasses (with sideshields) are recommended for normal handling of suspended nanomaterials. Gloves must be plastic or rubber, selected to also protect against any solvent used.

Dosimetry and Monitoring – No special dosimetry or monitoring is required. The Argonne Medical Department provides routine medical surveillance for employees identified through the JHQ as working with Engineered Nanomaterials.

Shipping Engineered Nanomaterials - Dispersible nanomaterials (includes unbound nanomaterials and nanomaterials in liquid suspension) are to be shipped or transported to Argonne and returned to the home institution through Argonne Shipping & Receiving Department. Nanomaterials in dispersible form transported in buildings or on-site must be in labeled secondary nonbreakable containers. See LMS-PROC-84, "Packaging, Transfer, and Shipment of Unbound Engineered Nanomaterials for transport requirements.

Waste Management and Spill Response – Spills of nanomaterials are to be treated as hazardous waste cleanup and the materials properly disposed through arrangements with Argonne WMO. Nanomaterial waste must be labeled as Hazardous Waste containing Nanomaterials. Damp cleaning methods with soaps or cleaning oils is preferred. Cleaning cloths should be properly disposed. Drying and reuse of contaminated cloths can result in re-dispersion of particles. Use of commercially available wet or electrostatic microfiber cleaning cloths may also be effective in removing particles from surfaces with minimal dispersion into the air. Energetic cleaning methods such as dry sweeping or the use of compressed air should be avoided or only used with precautions that assure particles suspended by the cleaning action are trapped by HEPA filters. If vacuum cleaning is employed, care should be taken that the HEPA filters are installed properly and bags and filters changed according to manufacturer's recommendations.

Experiment Authorization

Unless otherwise noted in the approved experiment safety plan, the Director of the APS Engineering Support Division delegates the authority to authorize an experiment in this hazard class to any of the persons in the beamline personnel that appear in the list of Beamline Manager personnel authorized to approve experiments and a member of the APS Experiment Review Board.

Hazard Control Verification

The Director of the APS Engineering Support Division delegates responsibility for verifying that required controls are in place to the experiment On-site Spokesperson and Beamline Management.

References

Reviewed: May 10, 2013