Industrial Hygiene and Exposure Assessment Exploration and Production Cheryl Metzler, CIH BP America...
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Transcript of Industrial Hygiene and Exposure Assessment Exploration and Production Cheryl Metzler, CIH BP America...
Industrial Hygiene and Exposure Assessment
Exploration and Production
Cheryl Metzler, CIHBP America Production Co.
Foundational
Work Planning
JSEA
Exposure Assessment Procedures
PPE Hazard Assessment
Worker Training
Exposure Assessment
Strategy equally applicable to all stressors Chemical Physical Biological Thermal Motion (Lifting, Force, etc.) Pressure (Noise)
Strategy
Anticipate Verify presence of hazard Identify jobs/tasks with exposure potential
Evaluate Exposure potential Perform monitoring
Control Confirm controls
ExposureAssessment
Chemical
Biological
Electrical
Gravity
Heat / Cold
Radiation
Pressure
Motion
ExposureAssessment
Chemical
Biological
Electrical
Gravity
Heat / Cold
Radiation
Pressure
Motion
Drinking WaterErgonomic Equipment Layout & Design
Fatigue
Legionella, Encephalitis,Tuberculosis, West Nile Virus, Hanta Virus, Bubonic Plague
Poison ivy / oak
Repetitive motion
Sanitation
Spiders, Bees, Ticks
ExposureAssessment
Chemical
Biological
Electrical
Gravity
Heat / Cold
Radiation
Pressure
Motion
BenzeneAsbestos
Caustic
Acids - sulfuric, hydrochloric,citric
Iron sulfide
Methanol
Welding fume (heavy metals,hexavalent chromium)
H2S
Mercury
Lead
Silica
ExposureAssessment
Chemical
Biological
Electrical
Gravity
Heat / Cold
Radiation
Pressure
Motion
Heat StressCold - Cryogenics
Cold - Frostbite, hypothermia
ExposureAssessment
Chemical
Biological
Electrical
Gravity
Heat / Cold
Radiation
Pressure
Motion
Suitability –hand / power tool
Overextension
Manual lifting
Slips / trips / falls
Vibration
ExposureAssessment
Chemical
Biological
Electrical
Gravity
Heat / Cold
Radiation
Pressure
Motion
Noise
ExposureAssessment
Chemical
Biological
Electrical
Gravity
Heat / Cold
Radiation
Pressure
Motion
Welding - UV Radiation
Sealed Sources (level detection) - Gamma rays, Alpha & Beta particles
Sunlight
NORM - Gamma rays, Alpha & Beta Particles
Operator’s Responsibility
Identify potential IH hazards
Communicate potential IH hazards to Contractors
Verify that contactor’s exposure assessment plan to protect workers is adequate
Contractor’s Responsibility Conduct personal sampling based upon
potential hazards 8-hour time weighted average Short term exposure limits Contractors must gather and retain medical
exposure records for 30 years past the term of employment
Compliance with 8 hour exposure limits does not equal compliance with STEL, i.e. 15 min at 5ppm for Benzene or 100 dB noise exposure for 2 hours
Asbestos Example
• Complete Asbestos Surveys for facilities /equipment constructed prior to 1982
• Identify employees with potential exposure for monitoring
• Complete monitoring by task
• Assess feasibility of engineering controls• Document respiratory protection, clothing and gloves by task / job
category• Verify with Occupational Health Nurse personnel needing to
complete respiratory questionnaire are identified
• Document determination regarding inclusion in medical surveillance
• Review training content
• Affected employees complete training
Ergonomics Example• Review Illness reports (backs, shoulders, elbows, hands, wrists).• Verify that corrective actions from investigations were effective.
Office Ergonomics• Conduct baseline office ergonomic survey for all employees to
identify high risk users.
• Conduct personal survey for high risk users.• Training on ergonomic hazards and equipment adjustment for all
employees
Industrial Ergonomics• Identify field tasks that may require baseline industrial ergonomic
survey.• Conduct personal survey for high risk tasks.• Training on ergonomic hazards and equipment adjustment for all
employees, including engineers.
Equipment-based Exposure Assessment
What equipment is onsite?
What product is in the equipment?
What are the hazards of the product in the equipment? The tools? The chemicals to be used? (MSDSs)
What other equipment is associated with it?
Equipment Life Cycle
Construct
Operate
Maintain
Demolish
Life Cycle Tasks What are
the tasks done on the equipment? Construct Operate Maintain Demolish
Who does these tasks?
50 ppm
25 ppm
15 ppm
10 ppm
0 ppm
8AM 12 Noon 4 PM
EXPOSURE LIMIT CONCEPTSACETIC ACID
CEILINGNot to be exceeded ever
STEL 15 minute task
TWAFull Shift
20
Continuous sampling example
020406080
100120140160180
21:3
3
21:5
9
22:2
5
22:5
1
23:1
7
23:4
3
00:0
9
00:3
5
01:0
1
01:2
7
01:5
3
02:1
9
02:4
5
03:1
1
03:3
7
04:0
3
04:2
9
Laboratory work
(titration's etc.)
Taking process acetate ester samples
Painting?
ppm (as isobutylene)
Time
Taking process
kettle samples
Benzene Example Identify equipment with potential exposure Identify tasks performed on equipment and
personnel performing tasks Monitor using personal sampling pumps
and charcoal tubes Use statistical analysis tools to compare
sampling results with OSHA standards Recommend controls, if required Schedule for repeated sampling to ensure
nothing has changed
Benzene
Exposures 8-hour Time Weighted Average (OSHA
PEL – 1 ppm) Tasks – Short Term Exposure (OSHA
STEL – 5 ppm) OSHA Oil & Gas Exemption for
Exploration – 10 ppm
Sampling Results – Tank gauging
Review Sampling data<0.1 ppm 0.02 ppm0.2 ppm 0.1 ppm
Use statistical program
Compare to OEL
Posterior
Exposure Rating0 1 2 3 4
Dec
isio
n P
roba
bilit
y 1
0.8
0.6
0.4
0.2
0
0 0.001
0.865
0.120.014
Process Overview – Benzene Example
Equipment & Tasks - Tank
Produced Water / Condensate / Rich Glycol Tank - Operation Tank gauging Sampling Truck Loading, water Truck Loading, oil
Equipment & Tasks - Tank
Produced Water / Condensate / Rich Glycol Tank - Maintenance Tank Cleaning/Internal inspection Piping/Flange/Gasket Replacement Meter Proving/Calibration/Replacement Changing Orifice Plate Pump - Repair Or Replacement VRU Repair/Replacement/Lube Oil Change Check thief hatch and Enardo/relief valve Transmitter repair / replacement / Level indicator
Equipment & Tasks - Filter
Glycol Sock Filter - Maintenance Piping/Flange/Gasket/Gauge Replacement Changing Gylcol Sock Filters
Equipment & Tasks – In-line Heater
Heater - Maintenance In-line Heater - Inspection - internal In-line Heater - Repair In-line Heater - Piping - repair/replacement
Equipment & Tasks – Separator
Separator - Maintenance Separators/free water knockout –
Inspection – internal Separators/free water knockout – Piping
repair replacement Etc.
Work Management System
Integrate hazard identification and IH monitoring into maintenance work order systems, e.g. Maximo
Applying to other operators?
Applying to other operators?
Conclusion
Questions?