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Update from the California Department of Public Health’s Occupational Health Branch
Barbara Materna, Ph.D., CIH
Chief, Occupational Health Branch
California Industrial Hygiene Council
December 7, 2016 – San Diego
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Overview
Intro to the Occupational Health Branch
Investigation: Isofluorane exposure in veterinary hospitals
Emerging issue: E-cigarette emissions in vape shops
Education & outreach: Some 2016 highlights
How you can stay in touch & use our resources
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Occupational Health Branch
Hazard Evaluation System &
Information Service (HESIS)
Occupational Health
Surveillance & Evaluation Program
Occupational Lead Poisoning
Prevention Program
California Safe Cosmetics
Program
Promoting safe and health workplaces across California
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OHB values
Utilize & contribute to the science
Collaborate across disciplines
Mentor future occupational health workforce
Partner with others
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Meet OHB’s industrial hygienistsJustine Weinberg
Jennifer McNary
Michael Cooper Marley Zalay
New OLPPP Chief!
Nina Townsend
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Promoting safe & healthy workplaces
Tracking & using data
Investigating hazards, illness
& injury
Providing info & assistance
Promoting health-
protective policies
Addressing emerging hazards
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Investigation:Isoflurane exposure in
veterinary hospitals
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Site visit for neurological exposures
Investigated exposures to
Mercury
Cytotoxic drugs
Pesticides
Anesthetic gas –isoflurane
Machine that administers anesthetic gas
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Prior isoflurane monitoring results
Range: None detected up to 6.5 ppm (8-hr TWA)
Recent: 3.5 ppm (8-hr TWA)
Cal/OSHA PEL: 2 ppm (8-hr TWA)
NIOSH REL: 2 ppm (1-hr ceiling) – halogenated agents
(ACGIH: 50 ppm 8-hr TWA for halogenated agents; no TLV for isoflurane)
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Health impacts of isoflurane
Animal studies Nerve cell death in brains
Learning and memory impairment
Reproductive effects: reduced fetal growth, brain/nerve damage in offspring of exposed animals
Only two occupational studies, also include N2O Effects on balance and breathing control
No studies on chronic occupational exposure to low levels of isoflurane alone
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Is waste anesthetic gas overexposure a significant issue in
veterinary hospitals?
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Stakeholder interviews
California Veterinary Medical Board
California Registered Veterinary Technicians Association
California Veterinary Medicine Association
Equipment servicer
Vets we know
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Issues identified
Lack of awareness of monitoring requirement and PEL
Lack of preventive maintenance on anesthesia machines
Lack of daily leak testing
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Cal/OSHA Consultation experience
7 visits to veterinary hospitals, 8/2008 – 7/2011
Results
6/7 facilities not monitoring
5/7 lacked reproductive hazards policy
5/7 lacked ventilation audits
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How to motivate change?
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How to motivate change?
Use visual impact to promote “best practices”
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Patient can emit anesthetic gas
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Real-time exposure monitoring
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Combining photography with monitoring
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Isoflurane monitoring methods
Passive sampler
Direct reading instrument: Miran gas analyzer
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0
5
10
15
20
25
30
35
40
45
Iso
flu
ran
e (
pp
m)
Measuring directly above over full canister
40 ppm over full canister
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-10
0
10
20
30
40
50
60
70
Iso
flu
ran
e (
pp
m)
Disconnect from animal, roll animal, and gas not turned off.
65 ppm when tube is
disconnected & gas
continues to flow
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-5
0
5
10
15
20
25
Iso
flu
ran
e (
pp
m)
Accidental disconnect and reconnect
20 ppm during accidental tube disconnect
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-10
0
10
20
30
40
50
60
70
80
90
Iso
flu
ran
e (
pp
m)
Rabbit neuter procedure with box induction
80 ppm peak during rabbit neuter procedure
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-1
0
1
2
3
4
5
6
7
8
9
Iso
flu
ran
e (
pp
m)
Rabbit procedure after box opening
Levels 2 to 8 ppm after box opening
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Next steps
Fact sheet and website page
Article for CVMA
Presentations at veterinary technician conferences
Thank you to vet staff
and our field team!
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Research on e-cigarette emissions:Vape Shop Worker Exposure Study
A collaboration with the NIOSH Health Hazard Evaluation Program
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What’s the health concern?
E-liquids containing nicotine + flavorings + carrier solvents are heated/vaporized
Emissions not “just water vapor” Diacetyl & 2,3-pentanediol often in liquids
Thermal breakdown products include HCHO & other aldehydes (carcinogens, asthmagens); metals
Nicotine poisoning via skin contact?
Until recently, completely unregulated products
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A typical vape shop
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Study questions
Current workplace conditions in vape shops?
Air and surface concentrations of chemicals?
Do workers experience symptoms?
What do employers and employees know about workplace risks?
What can be done to improve health and safety?
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Quantitative sampling
Area &/or personal air sampling Flavoring compounds: diacetyl
& 2,3-pentanedione VOCs* Formaldehyde & other thermal
degradation products Nicotine Particulate Carrier solvents
Wipe sampling for metals
Bulk liquids
*Volatile organic compounds
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Innovative sampling strategy
Canister Wipe & area sampling
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Interviews and site observations
Interviews with employers and employees
Observations of work practices
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Benefits to participants
Individual & shop sampling results
Health and safety recommendations
Overall findings
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Issues identified to date
Indoor air quality & ventilation
Chemical handling, use of PPE
Injury & Illness Prevention Programs
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Education & outreach:Some highlights from 2016
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Latest digital story:Toxic paint removers: Safer alternatives
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Toxic paint removers: Safer alternatives
http://www.cdph.ca.gov/programs/ohb-face/Pages/Stories.aspx
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Preventing Valley Fever in outdoor workers
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Updated HESIS e-fact sheet: Mercury
Focus on
Breaks & spills
Fluorescent bulb manufacture & recycling
Updated health effects, info on biomonitoring
Directs reader to more resources
http://www.cdph.ca.gov/programs/hesis/Documents/Mercury.pdf
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Avoiding disinfectant use in schools:Cleaning with microfiber
Disinfectants can cause or trigger asthma
Asthma-safer cleaning project pilot testing microfiber alternative
New law requires DPR* training if using disinfectants
*Department of Pesticide Regulation
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OHB staff acknowledgements
Vet hazards investigation: Jennifer McNary, Kathleen
Attfield, Tracy Barreau, Rick Votava, Kashyap Thakore, Saeher Muzaffar
Vape shop study: Kathleen Attfield, Marley Zalay,
plus NIOSH Health Hazard Evaluation Program
Education/outreach: Laura Styles, Robert Harrison,
Jason Wilken, Mary Deems, Jennifer McNary, Tracy Barreau, Debbie Shrem, Faith Raider
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Use our resources & services
OHB website: www.cdph.ca.gov/programs/OHB
Workplace hazard helpline: 1-866-282-5516 (toll-free in CA)
Invite us to speak at your events
Barbara Materna, PhD, CIHChief, Occupational Health BranchCalifornia Department of Public Health850 Marina Bay Pkwy, P-3Richmond CA [email protected] or 510-620-5730