This document summarizes the steps for assessing heat stress in the workplace according to guidelines from the American Conference of Governmental Industrial Hygienists (ACGIH). It involves first doing a screening analysis using the wet bulb globe temperature (WBGT) index to see if an action limit is exceeded. If so, general controls are implemented. If the screening level exceeds the threshold limit value (TLV), more detailed analysis may be needed using a method like the Predicted Heat Strain index. The screening process involves measuring WBGT, applying clothing adjustment factors, and comparing the adjusted WBGT to tables of action limits and TLVs based on workload and work/rest cycle allocation.
A PowerPoint for training in Respiratory Protection in the workplace. Covers information on Filtering Facepieces, Dust Masks, PAPRs, SCBAs, supplied air respirators, negative pressure respirators, Air-Powered Respirators and more.
A PowerPoint for training in Respiratory Protection in the workplace. Covers information on Filtering Facepieces, Dust Masks, PAPRs, SCBAs, supplied air respirators, negative pressure respirators, Air-Powered Respirators and more.
This presentation provides a general introduction to the prevention and management of musculoskeletal disorders that could be complemented with other presentations or publications in the scope of Campaign 2020-22 Healthy Workplaces Lighten the Load.
Presentation to the Australian Institute of Occupational Hygienists (AIOH) conference in Canberra December 2017 about the BOHS led Breathe Freely campaign to prevent respiratory disease in the construction and manufacturing industries. What lessons have been learned?
This presentation provides a general introduction to the prevention and management of musculoskeletal disorders that could be complemented with other presentations or publications in the scope of Campaign 2020-22 Healthy Workplaces Lighten the Load.
Presentation to the Australian Institute of Occupational Hygienists (AIOH) conference in Canberra December 2017 about the BOHS led Breathe Freely campaign to prevent respiratory disease in the construction and manufacturing industries. What lessons have been learned?
LEV in developing economies for slideshareMike Slater
Presentation to BOHS / OHSI Exposure Control and Containment Conference in Liverpool October 2016. Explores the challenges of designing and implementing local exhaust ventilation systems to control worker exposure to dust in developing economies
Managing Health in Construction – What Good Looks Like Mike Slater
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A presentation made at the Health and Wellbeing event at the NEC Birmingham on 9 March 2016
#breathefreely #bohsworld
Ioha2015 building awareness for slideshareMike Slater
An introduction to the BOHS led "Breathefreely" initiative. Working together to reduce respiratory disease in the construction industry. Presentation given at the IOHA2015 conference in London in April
Who are "World Health Without Borders?" - presentation given at a meeting held at the International Occupational Hygiene Association Conference in London, April 2015
New Drug Discovery and Development .....NEHA GUPTA
The "New Drug Discovery and Development" process involves the identification, design, testing, and manufacturing of novel pharmaceutical compounds with the aim of introducing new and improved treatments for various medical conditions. This comprehensive endeavor encompasses various stages, including target identification, preclinical studies, clinical trials, regulatory approval, and post-market surveillance. It involves multidisciplinary collaboration among scientists, researchers, clinicians, regulatory experts, and pharmaceutical companies to bring innovative therapies to market and address unmet medical needs.
Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
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TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
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Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
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Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
The Gram stain is a fundamental technique in microbiology used to classify bacteria based on their cell wall structure. It provides a quick and simple method to distinguish between Gram-positive and Gram-negative bacteria, which have different susceptibilities to antibiotics
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
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2. Threshold Limit Values ® (TLVs)
for heat stress are included in
the American Conference of
Governmental Industrial
Hygienists (ACGIH) TLV booklet
3. TLVs® are guidelines designed
for use by occupational
hygienists in making decisions
regarding safe levels of
exposure to various chemical
substances and physical agents
found in the workplace.
4. This flowchart summarises how
to apply the TLV’s. However. It’s
quite complex. We’ll go through
it step by step
5. General approach
Detailed Heat Strain
Screening
Analysis Monitoring
6. General approach
Detailed Heat Strain
Screening
Analysis Monitoring
8. Screening
NO Clothing
adjustment factors
available?
YES
9. TLV Clothing Corrections
Clothing Type WBGT Correction
Work clothes (long sleeve and pants) 0
Cloth (woven material) coveralls 0
Double layer woven clothing 3
SMS polypropylene coveralls 0.5
Polyolefin overalls 1
Limited use vapour-barrier overalls 11
10. Screening
NO Clothing
adjustment factors
available?
YES
If no clothing adjustment factors are
available, go straight to heat strain
(physiological) monitoring
11. Screening
NO Clothing
adjustment factors
available?
YES
This may be necessary, for
example, where chemical
protective suits are being worn
12. TLV Clothing Corrections
Clothing Type WBGT Correction
Work clothes (long sleeve and pants) 0
Cloth (woven material) coveralls 0
Double layer woven clothing 3
SMS polypropylene coveralls 0.5
Polyolefin overalls 1
Limited use vapour-barrier overalls 11
13. Screening
NO Clothing
adjustment factors
available?
YES
Are screening NO
criteria for Action
Limit exceeded?
YES
14. Work out the WBGT from the
results of environmental
measurements and apply the
clothing corrections
15. WBGT Index
No direct exposure to sunlight
WBGT = 0.7 tnwb + 0.3 tg
With direct exposure to sunlight
WBGT = 0.7 tnwb + 0.2 tg + 0.1 ta
17. ACGIH TLVs – Action Limit
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 28.0 25.0 - -
50% to 75% 28.5 26.0 24.0 -
25% to 50% 29.5 27.0 25.5 24.5
0 to 25% 30.0 29.0 28.0 27.0
18. To use this table you have to know
• the time spent working and resting
• the metabolic rate
19. Metabolic rate categories
Category Metabolic Examples
Rate (W)
Sitting
Rest 115
Sitting or standing
Light 180 Light hand / arm work
Walking
Moderate 300 Moderate lifting
Heavy materials handling
Heavy 415
Pick and shovel work
Very Heavy 520
20. ACGIH TLVs – Action Limit
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 28.0 25.0 - -
50% to 75% 28.5 26.0 24.0 -
25% to 50% 29.5 27.0 25.5 24.5
0 to 25% 30.0 29.0 28.0 27.0
21. So, for a job involving moderate
work where 75% of the time is spent
working and 25% resting
22. ACGIH TLVs – Action Limit
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 28.0 25.0 - -
50% to 75% 28.5 26.0 24.0 -
25% to 50% 29.5 27.0 25.5 24.5
0 to 25% 30.0 29.0 28.0 27.0
23. ACGIH TLVs – Action Limit
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 28.0 25.0 - -
50% to 75% 28.5 26.0 24.0 -
25% to 50% 29.5 27.0 25.5 24.5
0 to 25% 30.0 29.0 28.0 27.0
24. ACGIH TLVs – Action Limit
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 28.0 25.0 - -
50% to 75% 28.5 26.0 24.0 -
25% to 50% 29.5 27.0 25.5 24.5
0 to 25% 30.0 29.0 28.0 27.0
25. ACGIH TLVs – Action Limit
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 28.0 25.0 - -
50% to 75% 28.5 26.0 24.0 -
25% to 50% 29.5 27.0 25.5 24.5
0 to 25% 30.0 29.0 28.0 27.0
26. ACGIH TLVs – Action Limit
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 28.0 25.0 - -
50% to 75% 28.5 26.0 24.0 -
25% to 50% 29.5 27.0 25.5 24.5
0 to 25% 30.0 29.0 28.0 27.0
If the adjusted WBGT is below this value the Action Limit is not exceeded
27. Screening
NO Clothing
adjustment factors
available?
YES
Are screening NO
criteria for Action Low Risk
Limit exceeded?
YES
28. Screening
NO Clothing
adjustment factors
available?
YES
Are screening NO
Continue work
criteria for Action Low Risk
Monitor
Limit exceeded?
YES
29. Screening
NO Clothing
adjustment factors
available?
YES
Are screening NO
Continue work
criteria for Action Low Risk
Monitor
Limit exceeded?
YES
NO
If the Action Limit is
Are screening
exceeded then the WBGT
criteria for TLV
exceeded? value is compared with the
TLV criteria
YES
30. ACGIH TLVs – Screening TLV
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 31.0 28.0 - -
50% to 75% 31.0 29.0 27.5 -
25% to 50% 32.0 30.0 29.0 28.0
0 to 25% 32.5 31.5 30.5 30.0
31. Screening
NO Clothing
adjustment factors
available?
YES
Are screening NO
Continue work
criteria for Action Low Risk
Monitor
Limit exceeded?
YES
Are screening NO Implement
criteria for TLV general
exceeded? controls
YES
32. General Information, instruction & training
controls Regular drinks of water
Self regulation
Health screening and surveillance
Encourage reporting symptoms
Encourage healthy lifestyles
Monitoring
33. Screening
NO Clothing
adjustment factors
available?
YES
Are screening NO
Continue work
criteria for Action Low Risk
Monitor
Limit exceeded?
YES
Are screening NO Implement Continue work
criteria for TLV general Maintain controls
exceeded? controls Monitor
YES
34. Screening
NO Clothing
adjustment factors
available?
YES
Are screening NO
Continue work
criteria for Action Low Risk
Monitor
Limit exceeded?
YES
Are screening NO Implement Continue work
criteria for TLV general Maintain controls
exceeded? controls Monitor
YES
35. Detailed analysis
NO Are data available
for detailed
analysis?
YES
If the TLV is exceeded,
consider carrying out a
more detailed analysis
using a more sophisticated
method, such as the
Predicted Heat Strain
(PHS) index
36. Detailed analysis
NO Are data available
for detailed
analysis?
YES
NO
Action Limit
exceeded?
YES
37. The Action Limit referred to
here is that associated with the
index being used NOT the
ACGIH Action Limit
38. Detailed analysis
NO Are data available
for detailed
analysis?
YES
NO
Action Limit
exceeded?
YES
39. Detailed analysis
NO Are data available
for detailed
analysis?
YES
NO
Action Limit
Low Risk
exceeded?
YES
40. Detailed analysis
NO Are data available
for detailed
analysis?
YES
NO
Action Limit Continue work
Low Risk
exceeded? Monitor
YES
41. Detailed analysis
NO Are data available
for detailed
analysis?
YES
NO
Action Limit Continue work
Low Risk
exceeded? Monitor
YES
NO
TLV exceeded?
YES
42. The TLV referred to here is the
limit value associated with the
index being used NOT the
ACGIH Screening TLVs
43. Detailed analysis
NO Are data available
for detailed
analysis?
YES
NO
Action Limit Continue work
Low Risk
exceeded? Monitor
YES
NO
TLV exceeded?
YES
44. Detailed analysis
NO Are data available
for detailed
analysis?
YES
NO
Action Limit Continue work
Low Risk
exceeded? Monitor
YES
NO Implement
TLV exceeded? general
controls
YES
45. Detailed analysis
NO Are data available
for detailed
analysis?
YES
NO
Action Limit Continue work
Low Risk
exceeded? Monitor
YES
NO Implement Continue work
TLV exceeded? general Maintain controls
controls Monitor
YES
46. Heat strain monitoring
NO Implement Continue work
TLV exceeded? general Maintain controls
controls Monitor
YES
What if the TLV is exceeded?
47. Heat strain monitoring
NO Implement Continue work
TLV exceeded? general Maintain controls
controls Monitor
YES
Perform heat strain
(physiological)
monitoring
51. Heat strain monitoring
NO Implement Continue work
TLV exceeded? general Maintain controls
controls Monitor
YES
Perform heat strain
(physiological)
monitoring
Excessive heat NO
strain based on
monitoring?
YES
52. Guidelines for limiting Heat Strain
Factor Work should be discontinued if:
Heart rate (beats per minute) Greater than 180 minus age in years
Core temperature Greater than 38.5 0C (acclimatised)
Greater than 38.0 0C (unacclimatised)
Recovery heart rate 120
(beats per minute) (at one minute after peak work)
Other Symptoms of sudden and severe
fatigue, nausea, dizziness or
lightheadedness
53. Heat strain monitoring
NO Implement Continue work
TLV exceeded? general Maintain controls
controls Monitor
YES
Perform heat strain
(physiological)
monitoring
Excessive heat NO
strain based on
monitoring?
YES
54. Heat strain monitoring
NO Implement Continue work
TLV exceeded? general Maintain controls
controls Monitor
YES
Perform heat strain
(physiological)
monitoring
Excessive heat NO
strain based on
monitoring?
YES
Implement Job-
specific controls
55. Job-specific controls
Engineering controls
Administrative controls
Personal protective
equipment
56. Heat strain monitoring
NO Implement Continue work
TLV exceeded? general Maintain controls
controls Monitor
YES
Perform heat strain
(physiological)
monitoring
Excessive heat NO
strain based on
monitoring?
YES
Implement Job-
specific controls
57. Heat strain monitoring
NO Implement Continue work
TLV exceeded? general Maintain controls
controls Monitor
YES
Perform heat strain
(physiological)
monitoring
Excessive heat NO
strain based on
monitoring?
YES
Implement Job-
specific controls
58.
59.
60. At workstation
Ta = 24 0C
Tw = 22 0C
Tg = 28 0C
V = 0.4 m/s
Work involves monitoring process
Minimal manual effort required
Standard overalls worn
61. WBGT Index
No direct exposure to sunlight
WBGT = 0.7 tnwb + 0.3 tg
With direct exposure to sunlight
WBGT = 0.7 tnwb + 0.2 tg + 0.1 ta
62. At workstation
Ta = 24 0C
Tw = 22 0C
Tg = 28 0C
V = 0.4 m/s
WBGT = 23.8 0C
63. Screening
NO Clothing
adjustment factors
available?
YES
64. TLV Clothing Corrections
Clothing Type WBGT Correction
Work clothes (long sleeve and pants) 0
Cloth (woven material) coveralls 0
Double layer woven clothing 3
SMS polypropylene coveralls 0.5
Polyolefin overalls 1
Limited use vapour-barrier overalls 11
65. Screening
NO Clothing
adjustment factors
available?
YES
Are screening NO
criteria for Action
Limit exceeded?
YES
67. ACGIH TLVs – Action Limit
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 28.0 25.0 - -
50% to 75% 28.5 26.0 24.0 -
25% to 50% 29.5 27.0 25.5 24.5
0 to 25% 30.0 29.0 28.0 27.0
68. ACGIH TLVs – Action Limit
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 28.0 25.0 - -
50% to 75% 28.5 26.0 24.0 -
25% to 50% 29.5 27.0 25.5 24.5
0 to 25% 30.0 29.0 28.0 27.0
WBGT = 23.8 0C
69. Screening
NO Clothing
adjustment factors
available?
YES
Are screening NO
criteria for Action Low Risk
Limit exceeded?
YES
70. Screening
NO Clothing
adjustment factors
available?
YES
Are screening NO
Continue work
criteria for Action Low Risk
Monitor
Limit exceeded?
YES
71.
72. Boiler Cleaning
Air Wet Globe Air
temp. bulb temp. velocity
(0C) temp. (0C) (m/s)
(0C)
Start of work 34 19 51 0.2
After 5 hours 32.5 18.5 51.5 0.2
Heavy manual effort required
Standard overalls worn
73. Boiler Cleaning
Air Wet Globe Air
temp. bulb temp. velocity
(0C) temp. (0C) (m/s)
(0C)
Start of work 34 19 51 0.2
After 5 hours 32.5 18.5 51.5 0.2
WBGT = 28.6 0C
74. Screening
NO Clothing
adjustment factors
available?
YES
75. TLV Clothing Corrections
Clothing Type WBGT Correction
Work clothes (long sleeve and pants) 0
Cloth (woven material) coveralls 0
Double layer woven clothing 3
SMS polypropylene coveralls 0.5
Polyolefin overalls 1
Limited use vapour-barrier overalls 11
76. Screening
NO Clothing
adjustment factors
available?
YES
Are screening NO
criteria for Action
Limit exceeded?
YES
78. ACGIH TLVs – Action Limit
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 28.0 25.0 - -
50% to 75% 28.5 26.0 24.0 -
25% to 50% 29.5 27.0 25.5 24.5
0 to 25% 30.0 29.0 28.0 27.0
79. ACGIH TLVs – Action Limit
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 28.0 25.0 - -
50% to 75% 28.5 26.0 24.0 -
25% to 50% 29.5 27.0 25.5 24.5
0 to 25% 30.0 29.0 28.0 27.0
80. ACGIH TLVs – Action Limit
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 28.0 25.0 - -
50% to 75% 28.5 26.0 24.0 -
25% to 50% 29.5 27.0 25.5 24.5
0 to 25% 30.0 29.0 28.0 27.0
WBGT = 28.6 0C
So Action Limit is exceeded
81. Screening
NO Clothing
adjustment factors
available?
YES
Are screening
criteria for Action
Limit exceeded?
YES
Are screening NO
criteria for TLV
exceeded?
YES
82. ACGIH TLVs – Screening TLV
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 31.0 28.0 - -
50% to 75% 31.0 29.0 27.5 -
25% to 50% 32.0 30.0 29.0 28.0
0 to 25% 32.5 31.5 30.5 30.0
83. ACGIH TLVs – Screening TLV
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 31.0 28.0 - -
50% to 75% 31.0 29.0 27.5 -
25% to 50% 32.0 30.0 29.0 28.0
0 to 25% 32.5 31.5 30.5 30.0
WBGT = 28.6 0C
So TLV is NOT exceeded provided
work is restricted to 50% of shift
84. Screening
NO Clothing
adjustment factors
available?
YES
Are screening NO
Continue work
criteria for Action Low Risk
Monitor
Limit exceeded?
YES
Are screening NO Implement
criteria for TLV general
exceeded? controls
YES
92. Screening
NO Clothing
adjustment factors
available?
YES
Are screening NO
Continue work
criteria for Action Low Risk
Monitor
Limit exceeded?
YES
Are screening NO Implement Continue work
criteria for TLV general Maintain controls
exceeded? controls Monitor
YES
93.
94. Furnace Repair
Air Wet bulb Globe Air
temp. temp. temp. velocity
(0C) (0C) (0C) (m/s)
98 45 150 1
Heavy manual effort required
Thick, woollen clothing worn
101. ACGIH TLVs – Action Limit
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 28.0 25.0 - -
50% to 75% 28.5 26.0 24.0 -
25% to 50% 29.5 27.0 25.5 24.5
0 to 25% 30.0 29.0 28.0 27.0
102. ACGIH TLVs – Action Limit
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 28.0 25.0 - -
50% to 75% 28.5 26.0 24.0 -
25% to 50% 29.5 27.0 25.5 24.5
0 to 25% 30.0 29.0 28.0 27.0
Corrected WBGT = 79.5 0C
So Action Limit is exceeded
103. Screening
NO Clothing
adjustment factors
available?
YES
Are screening
criteria for Action
Limit exceeded?
YES
Are screening NO
criteria for TLV
exceeded?
YES
104. ACGIH TLVs – Screening TLV
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 31.0 28.0 - -
50% to 75% 31.0 29.0 27.5 -
25% to 50% 32.0 30.0 29.0 28.0
0 to 25% 32.5 31.5 30.5 30.0
105. ACGIH TLVs – Screening TLV
Allocation of Workload
work in work Light Moderate Heavy V ery
cycle heavy
75% to 100% 31.0 28.0 - -
50% to 75% 31.0 29.0 27.5 -
25% to 50% 32.0 30.0 29.0 28.0
0 to 25% 32.5 31.5 30.5 30.0
Corrected WBGT = 79.5 0C
So TLV is exceeded
106. Are screening
criteria for TLV
exceeded?
YES
NO Are data available
for detailed
analysis?
YES
Perform heat strain
(physiological) Detailed analysis
monitoring
108. Mike Slater, Diamond Environmental Ltd. (mike@diamondenv.co.uk)
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