Berkeley Lab
IH Monitoring Issues at Accelerators
Jim Floyd
Advanced Light Source
LBL
Berkeley Lab
Chemical monitoring in user facilities
• Staff vs. Users
• Similar Exposure Groups (SEGs) for Users
Berkeley Lab
Engineered Nanomaterials
• Notice N456.1“Using best available hazard information, conduct
exposure assessment for all nanotechnology activities involving UNP.”
• Sampling issues—Desire to use real-time particle counters
• Signal to noise problems• Establishing technical bases
Berkeley Lab
Example
Collect
Particle counts and filters from: both the source material and the work observation
Analyze filters by microscopy and bulk analytical methods
Berkeley Lab
Nano example
Berkeley Lab
Nano example
•Nanostructures consistent with the source material accounted for ~0.3 particles/cc
•Nanoparticles/nanostructures not consistent with the source material accounted for ~40 particles/cc
Berkeley Lab
Nano
• Sampling—Developing this technical basis at our nano science
center
—Hope to be able to apply it at elsewhere
• Standards—Carbon nanotube (CNTs)
Berkeley Lab
Lasers
• Baseline eye exams—Standard practice—Acceptance of third-party exams (“portability”)—Exemptions if under escort
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Other non-ionizing radiation
• Magnetic fields—5 gauss work areas
• RF
• UV
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Noise
• Most work is well below below ACGIH thresholds— 85 dBA (for 8 hours)
• But ubiquitous “nuisance noise” —Starting to use Preferred Speech Interference Level (PSIL)
for guidance on prioritizing mitigations.— 72 dB (at 500, 1000, 2000 Hz)
Berkeley Lab
Oxygen Deficiency
Standardized application for accelerator tunnels, etc.
(FNAL, et al.)
Application to lab environments is a little tricky
Berkeley Lab
The Usual Suspects
Peeling Lead Paint on Dome Soldering Station