Heat Stress Monitoring Program

Question 1

Navy Occupational Safety and Health (NAVOSH) Program Manual for Forces Afloat

Answer 1

OPNAVINST 5100.19 Series

Question 2

Prevention and Treatment of Heat and Cold Stress Injuries

Answer 2

NMCPHC-TM-OEM 6260.6

Series

Question 3

**Heat Stress

Answer 3

** 1. Any combination of air temperature, thermal radiation, humidity, airflow, and work load which stress the body as it attempts to regulate temperature.

2. Heat stress becomes excessive when the body’s capability to adjust is exceeded, resulting in an increase of body temperature. This can cause heat injury or DEATH.

Question 4

**Environmental Factors Causing Heat Stress

Answer 4

1. Thermal Radiation
2. Ventilation – Airflow
3. Humidity – Moisture in the Air
4. Air/Sea Water Temperature – Intake Valves that allow Sea water/Outside Air to be utilized for cooling for shipboard equipment systems.

Question 5

**Thermal Radiation examples

Answer 5

**1. Sun

**2. Heat Source (Incinerator, Engines, generators, Laundry Dryers, etc.)

Question 6

Ventilation examples

Answer 6

1. Forced Air Systems – Intake of Outside Air into Workspace (Spot-Cooling)
2. Forced Exhaust Systems – Removes stagnant or Increased Concentrations of Hazardous fumes or contaminants
   a. Red Devil Blowers

Question 7

**Humidity examples

Answer 7

**1. steam leaks

**2. bilge water

**3. condensation

Question 8

**Air/Sea Water Temperature examples

Answer 8

1. refrigeration units
2. engines
3. generators
4. evaporators for fresh water consumption

Question 9

**Acclimatization

Answer 9

** 1. The act of becoming accustomed to temperature or new environment

2. The body becomes more efficient in coping with heat stress.

** 3. Usually within 3 weeks or more

Question 10

**Personal Factors Associated with Heat Stress

Answer 10

• • (1) Past exposure to heat injuries will affect an individual’s ability to adapt to new situations.
    * *(a) Decreases the ability to handle heat stress conditions.

(2) Current health status and use of medications may alter physiological body changes.
(a) G6PD
(b) Sickle cell Trait

(3) Exercise and fluid intake (dehydration)
(4) Medication

** (5) Alcohol Intake

** (6) Lack of sleep

(7) Drugs

Question 11

**Common Locations of Heat Stress Conditions

Answer 11

(1) Heat Stress can occur in any space of the ship.

(2) Spaces most common in:
* * (a) Machinery Spaces
* * (b) Laundries
* * (c) Sculleries (PHEL V)/Galleys
* * (d) Incinerator Room
* * (e) Flight decks

Question 12

**Causes and Contributors to Heat Stress Conditions

Answer 12

• (1) Steam and Water Leaks
  (2) Boiler Air Casing Leaks
  (3) Missing/Deteriorated Thermal Insulation
• (4) Ventilation Deficiencies
  (5) Weather Conditions
• (6) Arduous Operation

Question 13

(PHEL)

Answer 13

Physiological Heat Exposure Limit

Question 14

**Physiological Heat Exposure Limit (PHEL) Chart

Answer 14

A set of 6 curves that compare the WBGT index and the degree of effort or work rate to determine the maximum permissible exposure to the heat stress environment.

Question 15

**The PHEL curves and work rates are established by

Answer 15

the Industrial Hygienist and NAVSEA

Question 16

**The Industrial Hygienist determines

Answer 16

individual Heat Stress Condition locations.

Question 17

**The local command creates a locally prepared form using

Answer 17

OPNAVINST 5100.19

Question 18

**Stay Time

Answer 18

Maximum allowable time personnel may work in heat stress conditions at a given workload.

Question 19

**Recovery Time

Answer 19

Is defined as a minimum of twice the stay time as determined by the PHEL chart or 4 hours whichever is shorter.

Question 20

Fuel Combustion Gases (Stack gas)

Answer 20

Combustion gases which may accumulate in a space due to inadequate ventilation or machinery malfunction

Question 21

Fuel Combustion Gases (Stack gas) Signs and Symptoms

Answer 21

1) Watery eyes
2) Dyspnea
3) Tingling or numbness of the tip of the tongue, tip of the nose, finger tips or toes.
4) Mild sensation of alcohol intoxication.

Question 22

**The MDR must provide heat stress training

Answer 22

during indoctrination and annually thereafter.

Question 23

**The MDR must provide heat stress training film

Answer 23

“Play it Cool: Heat Stress Prevention Afloat” for all hands

Question 24

** training must include

Answer 24

(a) Hazards
(b) Symptoms of Exposure
(c) Heat Stress First Aid
(d) Heat Stress monitoring
(e) Causes of Heat Stress

Question 25

** Heat Stress Monitors must receive training

Answer 25

within 12 weeks upon assignment

Question 26

** Complete Heat Stress surveyor watch station 318 of the safety programs afloat personnel qualifications standards (PQS)

Answer 26

NAVEDTRA 43704

Question 27

** requirements for reporting heat stress injuries

Answer 27

**a. Report using Accident & Injury Report. **b. Report to the Naval Safety Center should be made using the Web Enabled Safety System (WESS). c. All Navy heat stress-related injuries should be reported through the Naval Disease Reporting System (NDRS). d. Use Medical Event Report format if command does not have access to NDRS.

Question 28

**requirements of a heat stress survey.

Answer 28

**(1) All heat stress monitoring reports will be reviewed by the SMDR for inaccuracies and QA checks. The SMDR will make recommendations based on crew health status. **(2) The Supervisor or Engineering Officer of the Watch (EOOW) will make notation of any existing problems and corrective actions implemented. (3) The heat stress surveyor must check to ensure that the WB < DB; GT ≥ DB; and WB < WBGT < GT (4) Prior to Engineering Casualty or Damage Control Training Team (ECCTT/DCTT) drills, the Drill Supervisor must be informed of the current STAY TIMES. **(5) Routed to XO/CO for their comments and required actions, if any. (6) Routine reports where no administrative controls are required, submit at 8 o’clock reports. (2000 time frame). (7) Heat stress surveys that have reduced Stay Times must be routed through the chain and CO notification achieved for work shift alterations to occur. **(8) ALL REPORTS will be maintained by the SMDR for 1 YEAR. (9) SAMS generated reports are authorized and can be maintained on file by computer storage for periodic inspection by ISIC or higher authority.

Question 29

**Equation to Determine WBGT Index

Answer 29

(0.1 x DB)+(0.7 x WB)+(0.2 x GT)

Question 30

**approved WBGT meter/monitors

Answer 30

a) RSS-220 - WBGT Meter | b) QUESTemp 48N Heat Stress Monitor

Question 31

**Required Monitoring Conditions

Answer 31

**1) PHEL I through III when watch work length is 4 hours or less and DB is equal or greater than 100 degrees. 2) PHEL I through III when watch/workstation length is greater than 4 hours and DB is equal or greater than 90 degrees. 3) PHEL IV through VI and DB is equal or greater than 85 degrees.

Question 32

**RSS-220 WBGT Meter Acceptable range

Answer 32

100.0 + or - 0.2 degrees Fahrenheit

Question 33

RSS-220 WBGT Meter initial reading and subsequent reading wait times

Answer 33

** 1. initial: 5 minutes 2. subsequent: 3 minutes

Question 34

**holding position for RSS-220 WBGT Meter

Answer 34

chest level approximately 1 foot away from the body.

Question 35

QUESTemp 48N Heat Stress Monitor wait times

Answer 35

**1. Initial: 10 minutes 2. subsequent: 5 minutes

Question 36

** QUESTemp 48N Heat Stress Monitor holding position

Answer 36

chest level, 18” away from the body

Question 37

ships with an automated heat stress system (AHSS) installed, ensure at least

Answer 37

two portable WBGT meters are available on board