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3.2 Indoor Air Quality and Ventilation System, Employer informed employees…
3.2 Indoor Air Quality and Ventilation System
Indoor air quality (IAQ)
how inside air can affect a person's
health, comfort, and ability to work.
Not limited to
Temperature
Humidity
Mold
Bacteria
Poor ventilation
Exposure to other chemical
Poor IAQ will effect someone health
Legionnaires
Lung cancer
Asthma
allergy
Sick Building Syndrome
Building occupants experience acute health and comfort effect
Sometimes building occupants experience symptoms that do not fit the
pattern of any particular illness
Example
mechanical ventilation systems may not be designed or operated to
provide adequate amounts of outdoor intake air
Symtoms
eye
nose irritation
fatigue
rhinitis
cough
nausea
headache
sore throat
Sources for indoor air pollution
Tobacco smoke
Dust mites
Fungus
people and animals
Fire places
VOC's (Volatille organic compounds)
Emitted as gases from certain solids or liquids
Where can we found VOC's
Air freshers
Rubbing alcohol
Fabric & leather cleaner
Spot removers
Citrus or pine cleaners
Effect
Headaches
Eye, nose and throat irritation
Cancer
Liver damage
KIdney damage
How to keep home safe
Low temperature
VOC - free cleaning products
Reduce VOC product
increase room ventilation
Symtoms of poor indoor air quality
Headaches
Fatigue
Skin disorders
Fever
Loss of memory
Drowsiness
Nausea
Upper and lower respiratory problems
Consequences of Dry Air
Dry and itchy skin
Fatigue
Musical insturment get out of tune
Dried out wooden furniture and hardwood floors
Industry codes of practice (ICOP)
Purpose
To provide guidance
To set minimum standard for selected parameters
Scope and application of ICOP
Applies to all building
Chemical hazardous building
Removal and disposal of asbestos
Constructed building
Responsibility & Duty to investigate
Received complaints
Space exceeds control
Renovations
Duty to control exposure
The building owner or building management shall:
Maintain working environment
Regularly inspect
ductwork,
– dehumidifiers,
– cooling coils,
– filters,
– internal building surfaces, and
– and any other MVAC system components.
Inspection & Maintenance of MVAC
shall be in accordance with the manufacturer's recommendations
At all time
Clean or replace the filter
check cooling coils, condensate pipes
Every 1 month
clean the trays
every 6 month
inspect the building and MVAC system
Clean coils and condensate pipes
Clean AHU component
Control For Prescribed Activities
sealing of the area
displaying signage
safe work procedures
using portable exhaust system
carry out prescribed
activities
Pest control
Pesticide spraying shall be carried out
licensed pest control operator
outside normal working hours
Housekeeping & Cleaning
Housekeeping is important in preventing IAQ problems
Environment Tobacco Smoking (ETS)
Tobacco smoking is prohibited under
Control of Tobacco Product Regulations 2004
[P.U.(A)324/2004}
Control of Tobacco Product Regulations (Amendment) 2008
Control of Tobacco Product Regulations (Amendment) 2009
all indoor areas which are not covered by the Tobacco
Product Regulations 2004 smoking should also be
prohibited
INFORMATION, INSTRUCTION & TRAINING
Instruction
Give an instruction but not limited to
prohibition of smoking except at designated area
not to tamper with MVAC system
do not store material / chemical equipment in AHU room or ducting
ensure fresh air intake is not blocked at any time
Inform employer any discomfort- IAQ
Training
contents of this ICOP
Identification
Sign
Symptoms
Associated with the illness
Identification
Poor ventiolation
sign deterioration
in the air-conditioned or mechanical ventilation
system.
RECORD KEEPING
not < than 5 years
Assessment report - not < than 30 years
Record to be kept include
complaint records
investigation reports
Results of indoor air
contaminant measurementr
training records
QUALIFICATIONS, EXPERIENCE AND TRAINING
a registered assessor under the USECHH Regulations 2000
a registered hygiene technician I under the USECHH Regulations 2000
a person with at least a Diploma in pure or applied sciences and has 1 year experience
in occupational hygiene measurement of airborne chemical
any other person with equivalent IAQ competency
LOCAL EXHAUST VENTILATION
Used to control exposure of employees to chemicals hazardous to health
Operate on the principle
Capturing a contaminant at or near its source
Can be in form
Dust
smoke
mist
aerosol
vapour
gas
Components of local exhaust ventilation
4 main component
Hood
To collect the contaminant generated in air stream
local exhaust ventilation system will be effective unless enough of contaminants are retained or captured by the hoods
2 categorized
enclosure hood
exterior hood
Ducting
a network of ducts that connect the hood and other components of the local exhaust ventilation system
Purpose
to reduce losses of energy
Air cleaner
a device to remove contaminants that are carried in the contaminated air from hood
Purpose
to clean exhaust air
Example
air cleaner filter bag
cyclone
wet scrubber
Fan
Provides the energy to draw air and contaminants into the hood
must overcome all the losses due to
friction
hood entry
losses in the ducting system
losses due to air cleaner
Inspection of Local Exhaust Ventilation System
physical condition of all component
how the work carried out in
relation to the utilization
Smoke tube tracer test
Identify any thing that can be obstruction
of flow
Observation of condition surrounding and
near the hood
Inspection on the air cleaner device
Maintenance of the fan’s motor
Employer informed employees
Causes-poor IAQ
Complaint procedure
Effect
tobacco smoke and its contribution -IAQ
Modification and improvement on poor ventilation
Information
Findings - assesment
