CITY GAS DISTRIBUTION

O&M MANUAL
CHAPTER – 4
HEALTH SAFETY AND ENVIRONMENT
A – Safety
4.1 General Safety / Guiding Principles
4.2 HSE at Work
4.3 Hazards Identification and Control Measures
4.4 Safe Working for Excavation
4.5 Safe Working at Height
4.6 Safe Working in Confined Space
4.7 Working with Electricity
4.8 Vehicle Safety
4.9 Odorant Properties & Hazards

Module 6 of 9

Block - 15, 2nd Floor, Udyog Bhavan, Sector - 11, Gandhinagar – 382 011.
4.1 General Safety / Guiding Principles

Natural Gas is highly flammable gas. Two most usual hazards associated with it are
“Fire” and “Explosion”. In a City Gas Distribution, this highly flammable gas is
distributed through pipeline network to domestic, commercial, industrial and vehicle
consumers. The NG pipeline network is not limited to company’s premises but it
spread over entire city and reaches up to kitchen of a house / hotel or up to boilers /
machines of factory through internal of house or building.

Any leakage of NG due to substandard material or substandard construction or

substandard operation and maintenance can cause fire or explosion resulting injuries
/ fatalities. Thus NG gas connection is “Potential Bomb” which is spread over the city
and in a house / commercial establishment / industry. Technically, we can
understand that the business of City Gas Distribution is perhaps more risky as that of
refinery or petrochemical complex.

Hence safety must be a prime importance for any activity in City Gas Distribution
business.

Guiding Principles for Safety :

The zero accident goal is an ideal goal and it must be tried to achieve it by using
technology and safety philosophy.

EVERYONE is responsible to act in a manner so as to provide:

- Safety to himself.
- Safety to his fellow employees.
- Protection to public.
- Protection to company’s property,
Maintaining interest in safety is necessary even if the work place has been
“engineered” for safety, even when work procedures have been made as safe as
possible, and even after supervisors train their men thoroughly and continue to
enforce safe work procedures. It is still necessary to maintain interest in safety
because even with these optimum work conditions, accidents prevention basically
depends upon the desire of people to work safely.

Because all possible hazardous problems cannot be anticipated, each person must
frequently use his own imagination, common sense and self discipline to protect
himself. Each person must be simulated to think beyond his immediate work
procedures in order to act safely “on his own”

Most accidents occur in a work area to which a worker is not accustomised or most
accustomised and during a task that is not a worker’s usual task or most usual task.

EVERYONE is expected to study the safety instruction, orders and apply them to his
work,

Whenever there are doubts regarding any rules and regulations, one must consult
his engineer / supervisor or in-charge and safety engineer,

Whenever working on a new installation, equipment or a new machinery / tool, one

must consult his supervisor and carry out initial operations in his presence or /and
take thorough knowledge and training of it before working on it,
General Safety Rules and Regulations:

O&M Contractor is required to report promptly any situation affecting the safety of
any person or public in general or gas installation or any other property to GSPC
Gas.

O&M Contractor is required to report any accident (minor / major) or incident of gas
leak / fire / explosion promptly to concerned In-charge and GSPC Gas. Any person
sustaining an injury on the job, no matter how small, should be provided proper
treatment.

O&M Contractor is required to provide adequate numbers of “First Aid Facility / Kit”
at all site and must trained persons for first aid treatment. O&M Contractor is also
required to established contact with nearby hospital for immediate necessary
treatment

O&M Contractor must train and educate all staff for related job/s for safe working.
Each person of O&M Contract should train themselves to be on the lookout for
regulatory safety signs and should observe them all the time.

O&M Contractor must aware of and must comply with all legal requirements. Work
must be carried out as per specification of GSPC Gas and local standard as a
minimum.

Safety of operation must take priority over all other works. It is of utmost importance
that proper safety precautions are taken before any work whatsoever is undertaken
on our GAS CHARGED NETWORK / INSTALLATIONS. Safety precautions will
never be sacrificed at any cost.

Any maintenance / repair work on the charged network must be done only after a
work permit / written permission / authority is received form GSPC Gas. This is also
applied to electrical equipment / network.
O&M Contractor must ensure development work procedure and safety instruction for
each operation & maintenance job and communicated / explained to entire working
staff. Each job must be ensured that it is supervised by appropriate level of person.

Use of any match, lighter or other means of producing flames, spark or articles of
similar nature is prohibited while work in / on City Gas Distribution network /
installation.

Only authorized & trained persons of O&M Contractor must operate valves or any
equipment or machinery on gas network / installation.

No person is allowed in the City Gas Distribution (CGS) or District Regulator Station
(DRS) only except at such time as their duty may require. All entrances and exits
shall be made through authorized gates only.

Horseplay or fooling around while on duty is strictly forbidden. Running, jumping or

throwing material on job site is prohibited.

Contractor personnel must not tamper with any equipment, installation machines,
switches not connected with their work. They shall not start or stop any machine
without authority.

All covers on valve chambers, doors & locks of PRS, guards, fencing, railing etc. at
the stations must not be removed without proper authority.

No person of O&M Contractor should interfere with, remove, displace, damage or

destroy any safety devices or other appliances installed for protection of personnel
and plant equipment.

No obstruction should be put in the way of fire fighting or safety apparatus.

All supervisors of contractor shall ensure that the system, valves, section or
equipment is operated strictly to norms and procedures of operation laid down.

All operating & service personnel of O&M Contractor must wear an approved type of
dress (cotton safety cover all / dress with / without reflectory jacket or fire retardant
safety coverall with refractory bands). The use of loose dresses like dhotis, pajamas
or neck ties or scarf is forbidden.

Personal Protecting Equipment (PPE) prescribed for particular job must be provided
and ensured wearing of same.

Personnel doing hot job or working near open fire must use fire retardant clothing.
Clothes made of highly combustible synthetic fibers such as nylons, tereline etc. are
forbidden.

It is the duty of O&M Contractor to ensure that tools / machinery, equipment, network
installation, is adequate for the task to be performed and that no avoidable risk is
taken.

Proper tools must be used for the job. All tools must be maintained in good condition.
This applies not only to hand-tools but also to power-operated hand-tools and lifting
tackles, etc.

No machines, tools or materials which are not in safe / proper conditions should be
operated by Contractor personnel.

Valves should not be depended upon for effective isolation. They must be greased
for perfect sealing and if possible connecting pipelines should be blanked.

When work is being carried out at higher elevation, it is the responsibility of

supervisor and those carrying out the work to ensure safety belt life line to be worn
while working and that tools and materials are not left in position where they can fall
on employee below.
Where it is necessary to work at road site or in similar public area, it is the
responsibility of in-charge of the work to ensure that area around the job is cordoned
off and provide safe and adequate access for public.

All temporary scaffolds, cordons, sign boards etc. erected for the purpose of repair /
maintenance job should be removed promptly after the completion of the job.

Cleanliness is necessary for a safe plant or site work. Wastage like used papers,
oils, scrape pipe pieces etc. should be collected in proper dust bin and deposited in
specified scrap yard for further disposal.

O&M Contractor is required to develop Emergency Plan in consultation with GSPC

Gas. It must be communicated and explained to concerned members of contractor
4.2 HSE at Work

HSE Instructions

• Report promptly any situation affecting the safety of self or fellow employees
or property and public in general.

• Employees should train themselves to be on the lookout for regulatory safety

signs and should observe them all the time.

• Any person sustaining an injury on the job, no matter how small, should report
for treatment,

• Horseplay or fooling around while on duty is strictly forbidden,

• Employees are allowed in the pressure reduction station only at such time as
their duty may require. All entrances and exits shall be made through
authorized gates only.

• Employees must stay within their working zone and shall not roam around the
other installation or any other area.

• Running, jumping or throwing material on job site is prohibited,

• Where walkways are provided use them. Don’t use short cuts or make
pathways through equipments.

• Jumping on or off the trucks, automobiles or other vehicles are prohibited.

Employees should wait until vehicles stop before attempting to board or alight.

• Drive cautiously in the gas receiving campus. Stick to speed limits and other
instructions e.g. No Parking, Vehicle Entry Prohibited, etc. Vehicles shall be
parked in parking places only.
• Employee should never use compressed air to clean the clothing they are
wearing.

• Personnel doing hot job or working near open fire shall not wear clothes made
of highly combustible synthetic fibers such as nylons, tereline etc... Use of fire
retardant clothing is a must.

• Use of any match, lighter or other means of producing flames, spark or

articles of similar nature is prohibited.

• Only authorized persons may turn valves or operate any equipment or

machinery on any installation.

• No employees should interfere with, remove, displace, damage or destroy any

safety devices or other appliances installed for protection of personnel and
plant equipment.

• Cleanliness is necessary for a safe plant. Wastage like used papers etc.
should be deposited in proper receptacles.

• All industrial wastage likely to generate during O&M work shall be identified
and stored at designated store / bin in segregate manner

• All wastes shall be disposed as per legal / standard procedure and record of it
shall be kept.

• Every employee should study safety orders thoroughly and make proper use
of all safety devices and equipment furnished for his protection and the
protection of others.

• Every employee must familiarize himself with location and usage of safety
devices and fire fighting system.
• In case of heavy gas leakage on gas receiving station. All vehicles should be
parked (away from) gas receiving campus.

• Be sure you understand emergency instructions. Anticipate what you will do in

case of an emergency. Above all, be calm and alert for instructions.
4.3 Hazards Identification and Control Measures

In the operation and maintenance contract, for city gas distribution system, we need
to carry out many activities on assets at various locations. Highly flammable natural
gas, the activities, assets and location have associated hazards and may result into
loss / accident, if the associated hazards are not identified and control measures are
not taken. Let us understand the certain terms associated with hazards.

Hazard : A condition or practice with the potential for accidental loss.

Accident : An undesired event that result in harm to people, damage to

property or loss to process.

Control measures : Any thing done to reduce loss / accident from risk of
business activities, it includes,

the prevention of loss exposure,

the reduction of loss when accident occurs,

the termination or avoidance of risk.

Loss : Avoidable waste of any resource

Risk : Chances of loss.

Hazard Identification Plan

As part of the accident prevention policy and program, the contractor shall develop a
detailed Hazard Identification plan based on the initial hazard identification data
supplied by GSPC Gas.
Prior to the start of O&M, the contractor shall study the list of hazards associated with
various activities under the contract scope and control measures, given by GSPC Gas,
and conduct a hazard Identification tour with the company representative. Once this has
been completed, the contractor will prepare and submit a Hazard Identification Plan.
For effective execution of plan, all deployed for O&M should also be trained for hazard
identification techniques and control measures, fire, safety, site emergency handling
and first aid. Along with skill training, In the induction training for new employees.

In reviewing the safety requirements for O&M activities (i.e. new, modified or rebuilt
network & installation ), it is difficult for even the most experienced engineer and/or
contractor to identify all the potential safety hazards that may be encountered unless
a systematic potential-hazard review is conducted as a part of a Hazard Identification
Plan (HIP).
The below mentioned, Hazard Identification Plan (HIP) provides the method for
conducting such a review. The hazards identified are classified as A, B or C
according to their degree of Potential human impact considering severity and
probability (i.e. from most severe and probable to least severe and probable) during
the initial design phase. This allows for a change in the methodology or operating
procedure in the direction of reducing the risk associated with the hazard to an
acceptable level, or eliminating it altogether.

Hazard Classification :
Once the hazards are identified, they are classified as Class A, B, or C. Hazards are
categorized as under,

Class A hazard (Major) -----A condition or practice likely to cause permanent

disability, Loss of life or body part and or extensive loss of structure, equipment or
material.
Class B hazard (Serious) -----A condition or practice likely to cause serious injury or
illness, resulting in temporary disability or property damage that disruptive but not
extensive.
Class C hazard (Minor) ----- A condition or practice likely to cause minor, non
disability injury or illness, no disruptive property damage.
Example: "A" Hazards, Overhead electrical power lines over building site
Electrical power rating, (KV)
Show power lines on location map.
Corrective Action: Obtain work permit before starting any work under or near
electrical power lines.
No activity in area under power line until power lines have been disconnected
and/or relocated.

Hazard Identification Process :

Brief description of work and break job in various sub-activities

Conduct Hazards Identification Review. (To include on-site tour)
Identify & List Potential Hazards
Consider following potential hazards:
• Potential hazards to O&M team, other contractor personnel and potential
• Potential hazards to the general public.
• Natural gas leak /escape associated hazards,
• Asset / network associated hazards ,
• Site hazards.
• Hazardous materials identification / handling / storage
• Electrical and Static Charge Hazards
• Potential fire & explosion
• Potential hazards that may be encountered from outside sources
Brain storms the control measures for each hazard.
List the control measures against each hazard
 HAZARD AND RISK CONTROL MEASURES ASSURANCE
ACTIVITIES
Excavation work for PE / MS laying or • Experienced & competent team & supervision. • Surprise site visit /
maintenance : • Barricades & Cordoning off work area by warning inspection to review
tapes. Display of caution boards. risk assessment and
During excavation following Hazards / Risks
being realized with potential to cause fatal or • Detail of other utilities and coordination / intimation safe practice.

serious incident. to other utility departments • Training to all

Hazards / Risks : • Fire extinguisher at site. concerned staff

• Manually excavation by wooden / insulated handle • Conduction of
• Underground Electric cable can cause
on excavating tools. refresher program to
Electric shock.
• Referring of gas network drawing and extra care have better
• Underground Gas Pipe can cause leakage /
and concern to prevent damage. understanding about
Fire.
• Use of PPEs like cotton dress, reflectory jackets, hazards, risk
• Electric pole / Tele. Pole in trench area can
safety shoes, gumboot, hard hate awareness, safe
fall and cause Electric shock / injury.
• Use of cable detector and gas detector at site. practice and
• Dangerous Soak pit can collapse, can
• Use of flash light during night emergency handling.
cause fall / trap.
• Use of electrical insulation safety shoes and • Implementation of
• Building under construction can cause fall
insulated gears / levers while using mechanical safety checklist
of objects / materials.
equipment.
• Road traffic can cause Road accident /
• Ensuring work within cordoned area to prevent
incident.
road traffic incident.
 HAZARD AND RISK CONTROL MEASURES ASSURANCE
ACTIVITIES
Emergency Handling on PE Network - Damage • Implementation of safe procedure to handle gas • Surprise site visit /
& Leakage escapes / leak inspection to review
Damage, leakage of u/g PE gas network is • Experienced & competent team & supervision. risk assessment & safe
caused due to third party activity, rat bite, joint • Training to all concerned personnel for handling practice.
failure etc. The leakage may be known or gas escapes / leak. • Review of resources /
unknown. During handling of such emergency, • Emergency vehicle equipped with wireless, siren, manpower.
following Hazards / Risks being realised with tools, & tackles, fire extinguishers, first aid kit • Ensure restriction of
potential to cause category 1, 2, 3 incident. • Cordoning & evacuation of the affected area. mobile phone in
• Monitoring CH4 % in atmosphere. danger zone.
Hazards / Risks: • Isolation of affected section by squeezing / valves • Conduction of training /
pipe at safe place & reducing pressure by refresher program

• Uncontrolled gas escape in atmosphere controlled venting from safe location.

can cause fire.

• Collapse of trench excavated by third party
can cause injury / death.
• Travel of gas in other underground utility
chambers, can cause :
• Explosion in u/g utility /duct.
 HAZARD AND RISK ASSURANCE
CONTROL MEASURES
ACTIVITIES
• Fire/Explosion in adjacent house, building • In case of unknown leak point, sectional lock test
due to travel of gas through drainage lines. to identify nearest location of leakage.
• Asphyxiation • Checking of gas escape in utility chambers.
• Road traffic can cause road incident. • Checking of gas escape in adjacent residence as
• Static charge can cause fire. gas may travel through drainage lines. Evacuation
Use of mobile phone can cause Fire of people if required.
• Communication to affected customers.
• Use Fire Retardant dress, reflectory jacket and
other PPEs.
• Ensure that in any case excavation should not
allow, where gas concentration is high /
dangerous.
• Restriction of mobile phone in danger zone.
• Ensure grounding / earthing while using squeezing
tools.
• Process of emergency handling on PE network
depends upon site situation, volume of gas, type of
leakage, size of pipe, length of network, travel of
gas in other utility chamber, public movement on
road etc. So site work in-charge has to take
appropriate decision for isolation of entire section
or squeezing at safe distance and ensure
precautions against the potential hazard.
 HAZARD AND RISK CONTROL MEASURES ASSURANCE ACTIVITIES
Work in underground Valve Chamber : • Safe work procedures for maintenance work, gas • Ensure that steps are
venting / commissioning provided in all chambers

Various activities being out like, •

carried Safety work permits system having larger depth.

maintenance, isolation & depressurizing of • Work supervision by experienced supervisor. • Surprise / planned site

network, pre-purging, post-purging, pressure • Cordoning area & display of caution boards. visit to review safe

lock testing, commissioning, emergency • Fire extinguisher at site. practice, compliance of

repairs, dewatering etc. • Checking O2% & CH4% prior to entering in checking CH4% & O2%
chamber. before entering in
During these activities, following Safety
• Visual inspection in chamber for snake, harmful chamber.

Hazards / Risks being realised with potential to insects prior to entering in chamber. • Assure provision & use
• Provision of steps in deep chamber. of Personal Protective

cause fatal & serious incident.. • HSSE Inspection of valve chambers. Equipment like safety
• Use of 3-meter long vent pipe for venting, shoes, hard hat and
depressurization. display of caution board.
.
• Precautions for No smoking / source of ignition • Ensure use of reflectory
Hazards / Risks :
• Controlled venting/monitoring of CH4% in jacket while working on /
¾ Snake bites can cause death.
atmosphere. near road.
¾ Oxygen deficiency due to confined space,
• Remove / open all sleepers / top covers during • Ensure restriction of
gas leakage, N2 leakage can cause death,
work in chamber mobile phone in
asphyxiation.
• Leakage inside chamber can cause fire. • Handling of sleepers by experienced personnel, chamber, danger zone.
• Non availability of steps in deep chamber establishing coordination during lifting / shifting. • Conduction of training
can lead to injury • Use of adequate length of lever to operate valve on “Top Covers/
• Smaller length of valve key and greater in chamber Sleepers Handling”&
depth of chamber can cause back sprain, • Ensure all persons working in cordoned area, at Valve Chamber Entry
damage to valve stem. heavy traffic road
• Unsafe practice can cause head injury. • Use reflectory jacket while working on / near road
• Fall of sleeper in chamber can cause • Use of safety shoes, hard hat.
damage to valve, injuries to persons lifting • Restriction of mobile phone in chamber / danger
sleepers. zone.
• Road traffic can cause road incident.
• Use of mobile phone can cause Fire
 HAZARD AND RISK CONTROL MEASURES ASSURANCE ACTIVITIES
Hot work / tapping from charged PE network : • Safety works permit system. • Quarterly inspection /
• Safe work procedure. maintenance of

For tapping connection, either on line saddle • Experienced & responsible team & supervision. squeezing tools.
• PE Welder qualification system. • Half yearly review /

drilling carried out or electro-fusion fitting • Cordoning of work area. analysis of all cases of
• Use of squeezing tool / isolation of valves, to gas escaping through

welded after squeezing & cutting of required isolate the section. PE fitting during tapping
• Use of electrofusion fitting / machine. from charge line.

portion or by isolating valves of the section and • Controlled gas venting. • Planned / surprise site
• Fire extinguisher at site. visit to ensure safe

then cutting welding. During this process, • Ensure provision of double squeezing & enough practice.
space in trench Ensure no passing of gas from • Ensure restriction of

following Hazards / Risks being realised with squeezing. mobile phone in danger
• Ensure greasing is done for isolation valves to zone.

potential to cause fatal & serious incident. prevent passing of valves.

• Ensure that required time setting is done to
prevent over heating causing melting of EF fitting
Hazards / Risks :
/ pipe.
• Use fire retardant dress, reflectory jacket.
• Escape of gas during tapping can cause • Ensure grounding / earthing while using
 Fire. squeezing tools.
• Defective/unsafe cable, extension board, • Restriction of mobile phones in danger zone.
Electro Fushion machine can cause electric
shock.
• Static charge can cause fire.
• Road traffic can cause road incident.
 HAZARD AND RISK CONTROL MEASURES ASSURANCE ACTIVITIES
Working at height – Riser for high rise building : ƒ Surprise site visit /
Considering working at height for Riser • Work permit system. inspection to review risk
connection / maintenance work for building, • Use of safety belt. With fall arrestor assessment & safe
following Hazards / Risks being realized with • Use of hard hat. practice.
potential to cause fatal & serious incident. • Experienced & responsible team & supervision. • Ensure training on
Hazards / Risks : • Cordoning area at ground floor. “working at height “to all
• Use of “Zula” as working platform at height concerned persons

• Fall of person/s from height can cause fatal which is being controlled by worker posted at

incident. top of the building holding rope of “Zula”

• Falling object / material from height can • Ensuring that working at height is avoided during

cause head injury. adverse weather.

• Collapse of scaffolds / zula / platform can

cause serious incident.
• Defective drill machine / concealed cable
can cause Electric Shock.
 HAZARD AND RISK CONTROL MEASURES ASSURANCE ACTIVITIES
Commissioning of gas fired equipment : • Safe Work Procedure
Gas fired equipment along with control panel • Supervision by experienced Engineers and ƒ Assure implementation
with complete wiring is supplied installed and Burner supplier’s representative. of readiness & safety
commissioned by Gas Burner / Equipment ƒ Leak testing of all fittings / hoses. check list.
Supplier. ƒ Fire extinguisher at site.
• Ensure proper exhaust ducting / chimney.
• Ensure proper functioning of interlocks, blower,
Hazards / Risks: interlocking with burner, prior to start
commissioning / firing.

Fire / explosion • Implementation of Safety checklist.

 HAZARD AND RISK CONTROL MEASURES ASSURANCE ACTIVITIES
Safety hazards associated with unsafe conditions • Nothing except “Self Care” against hazardous • Identify hazardous
exist in premises of industrial customers. conditions exists in the industrial premises. industries and
During working in industrial customer premises • Discussion with Industry’s HSE dept for safe communication to all
following Hazards / Risks being realised with way of working concerned employees
potential to cause fatal & serious incident. • Use of PPE like hard hat, safety shoes. for necessary
Hazards / Risks: • Identification of hazardous industries precautions / action.

• Leakage / escape of hazardous chemical’s • Motivate industrial

customers to maintain
vapour can cause fire, health hazard.
• Fire in industry can cause serious burn / death safe condition / practices

• Unsafe equipment nearby work area can at their end.

cause explosion.
• Collapse of unsafe floor / building can cause
serious incident.
• Un safe –haphazard cables on the walk way /
passages can cause Electric shock.
• Obstacles on floor / walk way can cause slip /
trip / fall, head injury.
Radiation /fumes / vapours / poor illumination /
congested places can cause injury
 HAZARD AND RISK MITIGATING ACTIONS ASSURANCE ACTIVITIES
• Safe Working Procedure & Work ƒ Maintain inventory of Sodium
Odourant transferring from barrel to storage
permit system Hypochlorite and adequate PPE
tank
• Experienced & responsible team & required for spillage handling.
Ethyl Mercaptan is being used as an supervision. • Ensure training to all concerned
Odourant in NG. Transfer of EM from barrel to ƒ Solution of Sodium Hypochlorite to • Conduction of training / refresher
storage tank done by using pneumatic pump. neutralize leakage / vapour. program to have better
During this process, following Safety Hazards ƒ Nose mask with gas canister, understanding about hazards, risk
/ Risks being realised with potential to cause Chemical aprons awareness, safe practice,
fatal & serious incident. ƒ Manual handling of EM drums with emergency handling etc.
Hazards / Risks: care. • Ensure restriction of mobile phone
• Unsafe handling of barrel during shifting ƒ Scrubbing system. during transfer of Odourant.
can cause leakage/spillage. • A extra closed container / special • Ensure availability of required
• Spillage of EM while shifting, transferring, barrel to store spilled / leaking barrel. resources, equipment to handle
can cause panic situation / fire • Restriction of mobile phone. spillage emergency.
• Over pressure can cause bursting of barrel
/ explosion.
• Use of Mobile phone can cause fire /
Explosion,
4.4 Safety Working for Excavation

Excavation Work for City Gas Distribution Activities.

Excavation is very common and frequently used activity in any City Gas Distribution
System starting from project stage to operation / maintenance, e.g. pipeline laying,
pipeline repair, ground connection, squeezing of pipeline etc. This activity should be
performed in such a way that apart from getting the clear corridor for laying the Gas
pipeline, the existing underground utilities are safeguarded and public at large is not
put at inconvenience. Trial pits should be dug at regular intervals or wherever in
doubt about underground structure. Mechanical excavation can be used for speedy
work however, at certain places manual excavation only should be carried out as
required for safety and protection of other utilities/structures.

For excavation work in City Gas Distribution, below given procedure provides
general guidelines and safety of persons at work, associated hazards, and
environmental aspects during digging activity carried out during repairs of Gas
charged pipeline when damaged.
Sr.
Activity Steps Responsibility
No.
1 When the complaint is received for damage to Gas O&M Contractor
In charge
pipe, and Gas leak , assess the situation and prepare for
the required excavation and barricading for squeezing
and repair/replacement of damaged pipe/fitting,
2 Adequate & effective diversion should be provided for
pedestrian / vehicular traffic.
3 Residential / society / property owners / representatives
should be intimated about work.
4 Carryout the excavation for squeezing at nearest Work In-charge
possible spots at a safe distance, having zero methane
as shown by Gas detector.
5 Ensure that the charged Gas line and other utilities if Work In-charge
any are not further damaged.
6 The size (length, breadth and depth) of excavation for Work In-charge
squeezing and repair should be adequate for easy and
safe working.
7 Water leakage if any should be prevented and if Work In-charge
required carryout the dewatering as water ingress may
affect the work and pose electric shock /burn hazard
while working with Electrical Generator and
Electrofusion machine.
8 Carryout the backfilling/reinstatement immediately after Work In-charge
completion of repair/replacement and squeeze removal,
taking care of marking squeeze points and placing the
warning tape on Gas pipe.
9 Inform the control room and concerned persons about Work In-charge
completion of job.
10 Prepare the activity report and update the records. Work In-charge
For excavation work in City Gas Distribution, for new laying / extension / shifting,
below given procedure provides general guidelines and safety of persons at work,
associated hazards, and environmental aspects.

Sr.
Activity Steps Responsibility
No.
1 Before commencing excavation activity in city gas O&M
Contractor
distribution system network, site is visited / assessed and In-charge
preparation is ensured as per “Preliminary Checklist for
Excavation”
2 Based on site visit, list of tools tackles is prepared and safe Work In-charge
& good condition of tools are ensured
3 Copy of Permission for excavation from various authorities Work In-charge
are kept at site
4 Coordination is carried out with various utility agencies for Work In-charge
their supervision and guidance
5 A copy of work permit is obtained and is kept at site Work In-charge
6 Route is diverted or selected such a way that trees are Work In-charge
saved.
7 Area is clearly marked which to be excavated and Work In-charge
obstructions if any in / around marked area are cleared /
shifted.
8 Proper cordoning is carried out and caution / sign boards Work In-charge
are installed.
9 Residential / society / property owners / representatives are Work In-charge
intimated about work.
10 Adequate & effective diversion is provided for pedestrian / Work In-charge
vehicular traffic.
11 It is ensured that excavation activity by any means does not Work In-charge
create any noise pollution.
12 Excavation is carried out and excavated soil is dumped on Work In-charge
one site of trench
13 While carrying out excavation work, following safety Work In-charge
precautions are ensured (as required).
• Briefing to excavation labours about other utilities
• Manual trial pit for locating other utilities in ROU
• Shifting, Supporting & safeguarding other utilities
• Slopping & benching of excavation
• Shoring / side support of trench
• Preventing movement on edge of surface
• Depositing excavated soil 2 ft away from edge
• Providing ladder for emergency exit
• Inspection & observation by competent supervisor
• Preventing accumulation of water in trench
• Preventing person underneath loads, being handled by
lifting or digging equipment during machine excavation
• Keeping personnel away from any vehicle being loaded
or unloaded
• Use of Safety helmet & safety shoes
14 Special precautions are taken while working on Work In-charge
underground live electrical cables prone to damage by
excavating tools causing shock / fire
15 If presence of hazardous atmosphere is suspected in Work In-charge
trench, then the atmospheric testing is conducted before
entry into trench using calibrated instrument by trained
operator.
For specific hazardous location, the tool box talk is carried
out with excavation labours briefing them about hazards.
Work is not permitted / abandoned in following conditions,
• Oxygen less than 19.5 %.
• Combustible gas concentration greater than 20% of
lower flammable limit.
• Hazardous fumes / substances concentrations beyond
permissible limit
16 It is ensured that potential falling object / structure like light Work In-charge
 poles, bushes, building structure …etc are
• Supported properly
• Removed if possible
• Or excavation route diverted / adjusted accordingly
17 To minimize hazards to public at large following safety Work In-charge
precautions are ensured
• Backfilling excavated trench immediately after laying /
repair preferably on the same day (before sunset)
• Barricading / fencing of trench
• Cordoning of area using red & white glow tape
• Displaying sign / warning boards
• Displaying Warning Flash Light during night
• Providing temporary walkways across trench
• Controlling traffic around site
• Posting the persons with flag for traffic diversion
18 Emergency communication equipment, along with list of Work In-charge
key emergency telephone numbers are kept at site for
ensuring the effective communication in emergency.
19 In case of excavation work on charged gas network, two Work In-charge
nos of 5 kg DCP type fire extinguishers are provided at site.
20 It is ensured that a first aid box / kit and person/s trained for Work In-charge
first aid service are deployed at site.
21 In case of damage to underground services leading to a Work In-charge
leak, the following instructions are followed:-
1. Stop Work Immediately and cordon affected area
2. Contact control room and give full details of:-
a) Location
b) Situation
c) Persons involved
d) Type of service involved eg. gas, electricity, water
e) Level of risk/urgency of action.
3. Clear area of pedestrians (and traffic if necessary).
4. Consider evacuation of adjacent properties.
 5. Control the situation until the relevant utility engineers
arrive and take over.
22 All accidents or incidents at work site are reported Work In-charge
O&M
immediately to Control room, O&M Contractor In charge & Contractor
GSPC GAS O&M In charge. In charge

A written incident report is submitted to GSPC Gas

Company within 48 hours of the event
23 It is ensured that trench is back filled on the same day. If Work In-charge
trench is to be left open and unattended during night, trench
is cordoned and visible warning signs are provided
Environment aspects,
24 It is ensured that top soil of farm land is kept separate and Work In-charge
then backfilled on the top of trench
25 Hard rock / stones from backfill material are segregated Work In-charge
and soft soil is put first on gas pipeline while backfilling.
Trench is back filled and compacted properly.
26 Petrol, Kerosene, Diesel, Oil, etc. brought at site as fuel / Work In-charge
lubricants, are stored safely in closed containers. Spillage
of such material on ground is prevented at site by proper
handling.
27 All type of waste like paper, plastic, metal, etc. generated Work In-charge
during excavation activity are collected in waste bins and
disposed off at designated place.
28 On completion of work, it is ensured that site is restored to Work In-charge
safe level.
29 Work permit is closed and message to control room is given Work In-charge
 Preliminary Checklist for Excavation
Sr. Carried
Activity Status
No. out by
01 Site visit and Collection of detail / data which can
obstruct excavation
• aboveground structure like light poles, cable
structure, transformer station, drain pit, storm
water chambers, telephone panel
• anticipated underground utility, check / observe
for markers
• Water logging nearby or open drain
• any other obstruction / hurdles
02 Location and Marking of Area where excavation is to
be done
03 Coordination and intimation to various utility dept
like
• municipal corporation
• electricity co,
• telephone co.,
• gas co., ….etc
04 Collection of data / detail of other utilities
• type
• depth,
• nos.,
• size,
distance…
05 Marking of various utilities on site map / drawing
06 Permission for excavation from authorities
07 Preparation of tools tackles & equipment list, it’s
availability
08 Checking of condition of tools tackles & equipment
09 Work permit application
 List of Excavation Tools Tackles

Following tools tackles are normally required, for excavation activity. The quantity depends
on excavation, size & type of area and ground condition / situation. The good & safe
condition of tools tackles should be ensured.
Sr. No. Item Description Quantity
A Safety Items
01 Guardrails, fences Barricading set
02 Cordoning Tape
03 Caution boards
04 Flash Lights
05 Cable locator
06 Calibrated Gas Detector
07 Oxygen meter
08 PPEs, Safety Helmet, Safety Shoes
09 Reflective Jackets
10 Fire Extinguishers 5 / 10 kg DCP
11 Communication Equipment
12 Emergency Contact List
13 First Aid Kit
B Work Related Items
10 Trikum
11 Pawda
12 Tagara
13 Bari
14 Line dori & chuno
15 Measure tape (5 m, 30 m)
16 Petrol / Diesel Dewatering pump
17 Suction & Discharge hose pipes, foot valves
18 Buckets & rope
19 Ladder for egress ingress
20 Side support set
21 Excavator machine
22 Pneumatic Breaker with Compressor unit
23 Tractor trolley
4.5 Safe Working at Height

Content :

1. General Information
2. Procedure for safe way to Work at Height in City Gas Distribution

I. Annexure : 01 Preliminary Checklist for Working at Height

II. Annexure : 02 Tentative List of Tools tackles for Working at Height
1. General Information

In a typical City Gas Distribution system, many O&M activities involves “Working at
Height” activity such as riser work, plumbing work, painting, cable laying repair work
and general building maintenance.

Working at Height is very risky activity. The major hazard associated with this activity
is,
• Fall from Height

Which may result in injury, dislocation, fracture and may cause death also.

Hence eliminate the need of working at height by alternate arrangement.

Working above 3 meter height is considered as Hazardous activity. It should be first

assess by responsible person for risk involves and safety precautions to be taken.
2. Procedure for safe way to Work at Height in City Gas Distribution

Sr.
Activity Steps Responsibility
No.
1 Before taking ‘Working At Height” activity in city gas O&M Contractor
In charge
distribution system network, job preparedness is ensured
as per “Preliminary Checklist for Working At Height”
(Refer Annex :01)
2 Based on site visit, list of tools tackles shall be prepared Work In Charge

(Refer Annex : 02) and safe & good condition of same shall
be ensured
3 A copy of work permit shall be obtained and shall be kept at Work In Charge

site
4 All workers, who need to work at height, should be well O&M Contractor
In-charge
trained on proper usage of safety belt and
ascending/descending with safety belt.
5 While carrying out work at height, following safety Work In Charge

precautions should be ensured

• Briefing / Education to worker for risk involved in the
work and safety precaution to be taken.
• Use of ISI approved Fall Arrestor type Safety Harness
belt
• Use of proper anchor preferably mounted overhead
• Use of double action self locking snap hooks at each
connection which can limit free fall just 2 meter only
• Use of tool kit bag to carry tools
• Use of both hands to hold handrail of ladder while
climbing, Never keep tools in hand while climbing
• Prevent throw or drop material/equipment from height
• Avoid too many movements & jumping on height.
• Use proper passageway
• Use of safety helmet and safety shoes for protection
against fall of materials
6 Additional safety measures like providing safety net should Work In Charge
be considered depending upon site conditions, job
requirements
7 A additional person should be posted at ground / lower Work In Charge
level or on terrace to supervise and guide, the person
working on height
8 The work is well planned to maintain calm at height and to Work In Charge
avoid over exertion
9 Aluminum factory ladder should be used for work at Work In Charge
moderate height ( 1 to 3 meter height)
10 Work In Charge
Other simple ladder should be used with following
precautions

ƒ The best angle for placing the ladder is 75 degree

from ground level.

ƒ The footing must be level and secure. Ladders shall

be tied off at the top to prevent displacement or an
assistant should be posted to steady the ladder at its
base.

ƒ A 1 mtr length of strong rope permanently fixed to

the top of all ladders is in itself a safety device.

ƒ Ladders shall extend 36” above the landing area.

11 Work In Charge
All accidents or incidents at work site should be reported / O&M
immediately to base office / O&M Contractor In charge & Contractor
In-charge
GSPC GASO&M In charge
12 On completion of work, site should be restored to safe level Work In Charge
13 Work permit should be closed and message to control room Work In Charge

is given
 III. ANNEXURE : 01
Preliminary Checklist for Working at Height

Before taking Working at Height activity in city gas distribution system network,
following should be ensured by responsible supervisor

Sr. Carried out

Activity Status
No. by
Site visit and Hazard identification

Height of work
01 Overhead electrical live line
Any obstruction for movement
Space below work
Climbing Arrangement

02 Preparation of tools tackles list

03 Checking of condition of tools tackles & equipment

04 Work permit from company

 IV. ANNEXURE : 02

Tentative List of Tools tackles for Working at Height Activity

Following tools tackles are normally required to be prepared for Working at Height activity.
The list is only guidelines. The type & quantity of tools tackles depends on type of work. The
good & safe condition of tools tackles should be ensured.

Sr.
Item Description Quantity
No.

A Safety Items

ISI approved Fall Arrestor type Safety

01
Harness belt

02 Safety net

03 Safety Helmet, Safety Shoes

04 Aluminium Factory Ladders ( 4 ft, 6 ft, 8 ft)

05 Tool Carry bag

06 Cordoning Tape

07 Communication Device

B Work Related Items

07 Plumbing tools tackles

08 Painting tools tackles

4.6 Safe Working in Confined Space

• General Information

Confined Space: A confined space is a space that is large enough for a person to
enter, that has limited means for entry or exit, and that is not designed for continuous
occupancy. Examples include deep valve chamber, deep excavated pit, gas filter
vessels, storage tanks, etc.

The major hazards of working in confined space are lack of oxygen or exposure to
toxic / chemical fumes which may cause suffocation, unconsciousness and may
result in death too.
No work in confined space is to commence without prior planning and a thorough
risk assessment. The site shall be thoroughly inspected by Responsible Person to
determine if special safety measures must be taken.

Work shall be carried out under full supervision of experienced and competent
person.

• Hazardous Atmospheres

Responsible Person will inspect the site and test the atmosphere in a confined
space, if a hazardous atmosphere exists or could reasonably be expected to exist. A
hazardous atmosphere could be expected, for example, lack of oxygen, gas leak, or
near areas containing gas pipelines, chemical / toxic fumes from improper cleaned
tank / vessel, gas / fumes passing from isolated valves, stored hazardous
substances inside confined space, etc.
Workers shall be prohibited from working in hazardous and/or toxic atmosphere
confined space. Such atmospheres include those with:
• Less than 19.5% oxygen
• A combustible gas concentration greater than 20% of the lower flammable
limit
• Concentrations of hazardous substances that exceed those specified in the
 Threshold Limit Values for airborne contaminants established by the ACGIH

Atmospheric testing in a confined space will be performed using a properly calibrated

direct reading oxygen & gas monitor. Direct reading gas detector tubes or other
acceptable means may also be used to test potentially toxic atmospheres.

Each atmospheric testing instrument shall be calibrated by Responsible Person on a

schedule and in the manner recommended by the manufacturer.

Each atmospheric testing instrument will be field checked immediately prior to use to
ensure that it is operating properly.

• Ingress and Egress

Ensure proper and accessible means of exit before entry inside a confined space.

Good condition ladder/s or stair/s shall be provided at confined space / chambers

where employees are required to enter over four (4) feet deep. The maximum
distance of lateral travel (along the length of the trench) necessary to reach the
means of egress shall not exceed 25 feet

Ladders must be secured and extend a minimum of 36 inches above the landing.

• Working In Confined Spaces

Following safety practices for working in confined space like tanks, vessels and
chambers should be followed in addition to the safety guidelines for specific jobs like
scaffolding, cutting/welding etc.

• Shut down, isolate, depressurise and purge the vessel as per laid down
procedures.

• Entry inside the vessel and to carry out any job should be done after issuance
of valid permit only.
• Ensure proper and accessible means of exit before entry inside a confined
space.

• The number of persons allowed inside the vessel should be limited to avoid
overcrowding. They should wear safety harness belt and life line

• An attendant / assistant should be posted outside the confined space, holding

the lifeline and communicating / helping him from outside.

• Communication should be always maintained between the worker and the

attendant / assistant posted outside of confined space.

• Ensure requisite O2 level before entry in the confined space and monitor level
periodically or other wise use respiratory devices.

• Check for no Hydrocarbon or toxic substances before entry and monitor level
periodically or use requisite Personal Protective Equipment.

• Ensure adequate ventilation or use respiratory devices.

• Depending upon need, necessary respirator system, gas masks and suit shall
be worn by everyone entering confined space. In case of sewer, r in the
confined area where there is a possibility of toxic or inert gas, gas masks shall
be used by everyone while entering.

• Barricade the confined spaces during hoisting, radiography, blasting, pressure

testing etc.

• Use 24V flameproof lamp fittings only for illumination.

• Use tools with air motors or electric tools with maximum voltage of 24V.

• Housekeeping shall be well maintained.

• Safety helmet, safety shoes and safety belt shall be worn by everyone
entering the confined space.

• Don't wear loose clothing while working in a confined space.

• The cutting torches should also be kept outside the confined space
immediately after the cutting.

• The gas cylinders used for cutting/welding shall be kept outside.

• All cables, hoses, welding equipment etc., shall be removed from confined
space at end of each work day, even if the work is to be resumed in the same
space the next day.

• To the extent possible sludge shall be cleared and removed from outside
before entering.

• No naked light or flame or hot work such as welding, cutting and soldering
should be permitted inside a confined space or area unless it has been made
completely free of the flammable atmosphere, tested and found safe by a
competent person. Only non-sparking tools and flameproof hand lamps
protected with guard and safety torches should be used inside such confined
space or area for initial inspection, cleaning or other work required to be done
for making the area safe.
4.7 Working with Electricity

Content :

1. General Information

2. Procedure for Safe Working with Electricity and Electrical Installation /

Appliances

Preliminary Checklist for Electrical Job

List of Tools Tackles for Electrical Work

1. General Information

For typical city gas distribution, electricity is used in many activities such as
illumination, CS & PE welding activity and for portable tools used in plumbing jobs.
Power supply to actuated valves, fire pumps, air compressor, etc…

Electricity when not handled safely can prove very dangerous. The hazards of
electricity are,
• Electric shock
• Electric burn
• Electric fire

Most electrical accidents occur because of improper equipment, unsafe practice,

carelessness or ignorance. It is essential to learn about the safe use of electricity
and electric appliances in order to prevent accidents.

Electric shock is caused by passage of electric current through the body. It affects
the nervous system, the muscles and organs of the body. Passage of current
through heart would stop blood supply to brain. Personal sensitivity to electric shock
depends on age, general heath, moistness of skin and other physiological factors.

Longer period and heavy current passage through body can cause burn to body,
which is known as electric burn.

It is observed that most of the fires are caused by electric short circuit / sparks,
arching, over heating of electrical circuits, defective wiring, unsafe use of appliances
or wrong connections, sub-standard fixture, etc…
2. Procedure for Safe Working with Electricity and Electrical Installation /
Appliances

Sr.
Activity Steps Responsibility
No.
1 Before commencing any electrical job or activity on O&M Contractor
electrical installation in city gas distribution system network, In-charge
job preparedness is ensured as per “Preliminary Checklist
for Electrical Job”
2 Based on site visit & type of work, list of tools tackles is Work In-charge
prepared and safe & good condition of tools is ensured
3 A copy of work permit (if applicable) is obtained and is kept Work In-charge
at site
4 While carrying out work on electrical installation, following Work In-charge
safety precautions are ensured
• Only experienced & competent person having valid
licenses / certificate is allowed to work on electrical
facilities
• Electrical safety items such as gloves, insulating mats,
hoods etc. are used while maintenance on electrical
installation
• Use of approved and tested tools
• Use of non-conductive ladders
5 Before working on electrical circuit or equipment : Work In-charge

• the current is switched off by a responsible authorized

person;
• Precautions are taken to prevent the current from
being switched on again by use of appropriate lockout
& tag out system.
• the circuit or the equipment is tested to ascertain that
they are dead;
• the conductors and equipment are earthed and short-
 circuited;
• neighboring live parts are adequately protected
against accidental contact.
6 After completion of work, the current is switched on again, Work In-charge
only after proper verification.
7 Work In-charge
A waste / dust bins are kept at site and all type of waste like
paper, plastic, metal, etc. generated during electrical
maintenance activity are collected in waste bins and
disposed off at designated place.
8 Fused fluorescent tubes, batteries and other electrical Work In-charge
waste are collected, stored separately and disposed off at
designated place or to authorized dealer as per
Environment Act
9 Oil, Diesel, etc. are stored and handled carefully using Work In-charge
various handling device to prevent spillage.
10 Waste oil collected from Diesel Generator (DG) set is Work In-charge
stored and disposed off at designated place or to
authorized dealer as per Environment Act
11 The record / register of above waste (generation, stored Work In-charge
and disposed) is maintained.
12 The workplace is made safe. The work permit is closed and Work In-charge
message to control room is given.
13 While using electrical operated portable tools - tackles, Work In-charge
especially electric drill machines, Portable power
generators, Electrofusion machines for GI & PE pipe repair
and installation in city gas distribution, following safety
precautions should be ensured
• Use of Low voltage (if available) portable electrical
tools
• Use of Appliances / tools with 3 pin plugs and their
connection to 3 pin sockets only.
 • Connection of one appliance / tool to one socket only
• Avoid use of temporary electrical connections, joints
and extension.
• Avoid use of bare wire ends in a socket
• Use of non-conductive connector for joining wire
• Use double insulated portable tools
• Provide earthing to all electrical tools
• Obey warning signs
• Switch off apliance / tools immediately after use, by
both, local switch and main switch
14 Manufactrer’s operating instruction should be read, Work In-charge
explained to worker / electrician and followed.
15 Loose cloths, finger ring, bracelets, mettalic wrist watch etc Work In-charge
should not be allowed while working.
16 Electrical lights, torches, portable tools required in Work In-charge
hazardous area like valve chamber, regulator station, city
gate station should be intrinsically safe.
17 All electrical tools should be maintained and inspected on a O&M Contractor
regular basis by a competent electrician and records are In-charge
maintained.
18 Defective electrical appliances / tools should be replaced / O&M Contractor
repaired by competent authorised electrician In-charge
19 While carrying out electrical work for PE Electrofusion Work In-charge
Jointing for repairs, maintenance and New laying, following
safety precautions should be ensured
• Deploy experienced, trained & competent persons
with valid licenses / certificates
• Locate portable generator at least 10 meter away
from work and perpendicular to wind direction.
• Protect against rain / splash of water
• Deploy 4.5 kg CO2 or 5 kg DCP type fire extinguisher
at easy accessible location.
• Use industrial type power extension boards and plug
 sockets with insulated 3-pin plug tops
• Provide Earth Leakage Circuit Breaker (ELCB) for all
temporary connections
• Temporary cables should be, free from cuts,
damaged insulation, kinks or improper insulated
joints.
• Repair / repalcement of defective electrical
appliances / tools should be carried out by
competent authorised electrician only.
20 Control box unit is positioned outside trench and output Work In-charge
leads are extended up to fusion fitting in the trench.
21 Power supply cables are laid properly and neatly so that Work In-charge
they don't cause hindrance to persons working.
22 All electrical equipment placed at work site should be Work In-charge
suitably protected from rain, splash and water logging.
23 For prevention and control of static charges, during PE pipe Work In-charge
welding, the pipe & surrounding area should be dampened/
earthed using wet cloth / earthing wire
24 The wet cloth is then wrapped around the PE pipe Work In-charge
adequately away from welding portion.
25 Earthing / grounding cable (3 meter long) along with clamp Work In-charge
on one side should be connected with PE pipe and sharp
rod on other side of cable should be inserted in wet ground.
26 After completion of electro fusion welding, power generator Work In-charge
should be switched off first and then control box unit from
site should be removed. The earthing connection should be
removed last
27 A waste / dust bins should be kept at site and all type of Work In-charge
waste like paper, plastic, metal...etc generated during PE
Electrofusion welding activity should be collected in waste
bins and disposed off at designated place.
28 While plumbing work in domestic / commercial premises , Work In-charge
 following safety precautions should be ensured
• Knowledge of concealed wiring and selecting the Work In-charge
pipe route, away at safe distance
• Use of wooden stool / table / ladder for drilling work Work In-charge
• Use of safety shoes or rubber mat to prevent shock Work In-charge
from concealed wire
• Checking of overhead electrical line in residential Work In-charge
area before lifting up GI pipe.
• Avoid GI pipe lifting up as far as possible. Preferably
hold / shift in horizontal position
• Use double insulated portable drill machine. Work In-charge
29 All accidents or incidents at work site should be reported Work In-charge
immediately to control room, O&M Contractor In charge & /
GSPC GAS O&M In charge. Contractor O&M
In-charge
A written incident report should be submitted to GSPC Gas
Company within 48 hours of the event
 Preliminary Checklist for Electrical Job

Before taking activity on electrical installation in city gas distribution system network,
following should be ensured by responsible supervisor

Sr.
Activity Carried out by Status
No.
Site visit and hazard identification

• Voltage
• Power on / off switch & its condition
1.
• anticipated risk like open cable, frayed
insulation, improper earthing
• Overall illumination
• Overhead position of electrical lines
Preparation of tools tackles list & it’s
2.
availability
Checking of working condition of tools
3.
tackles & equipment
4. Work permit application
 List of Tools Tackles for Electrical Work
Following tools tackles are normally required to be prepared for Electrical Work /
Activity on Electrical Instillation. The list is only guidelines. The type & quantity of
tools tackles depends on type of work. The good & safe condition of tools tackles
should be ensured.

Sr. No. Item Description Quantity

A Safety Items
01 Cordoning Tape
02 PPEs, Safety Helmet, Safety Shoes
03 Insulated Gloves
04 Rubber mat/ sheet
05 Tester Lamp or Tester Screw driver
06 ISI mark Insulation tape
07 Fire extinguisher 4.5 kg CO2 / 5 kg DCP type
08 Wooden Table /Wooden Ladder
09 Lockout & Tag Out Set
10 Earthing Cable 3m long with clamp and sharp rod
B Work Related Electrical Items / Instruments
11 Multi meter
12 Extension boards
13 Insulated Screw drivers of various size
14 Insulated Cutter
15 Insulated Pliers
16 Fuse wire
17 Loose wire / cables
18 Extension Multi plug board
19 Portable generator
20 Control Unit for Fusion Welding
21 Double Insulated Portable drill with suitable bits
22 Oil, Diesel handling items
4.8 Vehicle Safety

General

Driving is extensively needed in City Gas Distribution O&M Activities as network

spread over wide area of city. Travel on two wheeler or in four wheeler, from one
area to another area, or one city to another city, is frequent activity involving right
from senior employee of company to contract person.

Road accident is a major contributor for LTIF cases in CGD business. Many a times
road accident results in fatality, affecting business activity. Hence control of road
traffic accidents should be key focus area for O&M contractor.

Defensive driving is driving to prevent accidents, in spite of the incorrect actions of

others or adverse weather conditions. A safe driver is not merely someone who has
been lucky enough to avoid accidents, but is one who drives defensively and looks
out for others.

O&M Contractors are required to train and educate drivers-driving four wheeler, and
employees- driving two wheeler, thoroughly to control road traffic accident.

Instructions for O&M Contractor

1. Driver must hold an appropriate driving license with proper validity for the types of
vehicle intend to drive.

2. Vehicle used must have proper RTO clearance & third party insurance and copy of
same to be kept in vehicle. PUC certificate with proper validity must be kept with
vehicle.

3. All drivers (two wheelers & four wheelers) must be trained & educated about traffic
rules & defensive driving.

4. Driver must be knowledgeable about the vehicle and its’ safety features.
5. Vehicle must be properly maintained and fit for road travel.

6. Periodic Vehicle Inspection must be carried out with standard format by supervisor /
work in-charge to check vehicle condition. Any defect / repair requirement must be
immediately notified to concerned person for rectification.

7. No vehicle will be driven if the driver feels the vehicle is not in safe working order.

8. All four wheel vehicle must have emergency contact number list and first aid kit in
good condition.

9. It is good practice that driver / team leave details of site to be visited, planned route
and expected duration of visit with supervisor / main office.

10. Driving after the use of drugs or alcohol is strictly prohibited. Such violation cases
must be reported to base office / O&M Contractor In-charge

11. Use a mobile phone while driving is strictly prohibited. Person can use cell phone,
after vehicle is safely parked.

12. Eating or drinking while driving is NOT allowed.

13. Use of earphones or loud music is not permitted. Driving requires 100% of attention of
drivers

14. Under no condition an un-authorized driver will allow, to operate the vehicle.

15. Driver and all passengers, must wear seatbelts (in case of four wheeler) / crash
helmet (in case of two wheeler) when traveling.

16. Ensure that loose objects (e.g., Tool Box, PPEs, Valve Keys, etc...) in the vehicle are
secured. Placing objects that can hinder the vision from window is NOT allowed.

17. Never try to fit more people in the vehicle than you have seatbelts for them to use.
Instructions for Drivers:

1. ANTICIPATE driving hazards and know how to protect yourself from them.

2. Be alert while driving by keeping your mind free of distractions and your
attention focused on driving; alertness involves watching and recognizing
accident-causing factors instantly

3. Concentrate on driving, rather than personal problems or work. Be attentive to own

actions, the actions of others and the roadway environment

4. Keep a cool head. Don't drive aggressively and don't take chances

5. Do not change / tune of radio / audio players to distract eyes from the road

6. Drive within your lane. Change only if it is safe to do so and after giving proper signal.

7. Speeding with negligence is the direct cause of most road accidents leading to injury
and death. Driving at high speed does not give sufficient reaction time to observe
hazards and also greater the stopping distance and larger the chances of accident.

8. Use turn signals to indicate intention to turn or to change lanes. Turn it on to give the
cars behind you enough time to react before you take the action. Also, make sure the
signals turns off after the action have completed.

9. Keep a safe stopping distance behind the vehicle in front of self vehicle. Driver should
be able to prepare to stop within 2 seconds, whatever your speed.

10. Obey the speed limits, going too fast gives, less time to stop or react. Excess speed is
one of the main causes of vehicle accidents.

11. Be alert to "blind spots" when changing lanes. Look all ways and always use turn
signals.

12. Take 15-20 minute rest breaks every two hours of constant driving. Opening the window
and/or turning on the radio will have little effect on tiredness

13. Do not drive when tired. Find somewhere to park or stop. Once stopped somewhere
safe, drink a cup or two of tea / coffee followed by a short nap (15-20 mins)
14. In event of breakdown or puncture, either park the vehicle in a safe location, or ensure
all occupants leave the vehicle and stay in safe location

15. A daily vehicle inspection will be performed. Any malfunction or problem with vehicle
will be promptly reported to supervisor.

16. Before backing, drivers must "clear" the space behind their vehicle. Use all mirrors and
if necessary, get out and check behind the vehicle before backing. Normally, it is not
necessary to accelerate when backing

17. Never leave a vehicle unattended when running or with the keys in the ignition. When
making a delivery -- turn off the ignition and lock the vehicle

Driving during Night

18. Be especially careful when driving after sunset / night.

19. Speed should be kept low at night to enable you to react and stop safely within the
distance you can clearly see ahead.

20. The use of headlights can temporarily blind other road users, as well as you!!!

21. Potholes are difficult to spot,

22. Keep in mind that other drivers can be tired and slow to react

Driving during Festival

23. Be careful especially when driving during Kite Festival.

24. Be alert and drive your vehicle slowly. Children may run on the road to catch kite.

25. Avoid travel on two wheeler.

26. Sever cut on neck by the string of paper kite can result in fatality. Use muffler around
neck. Suitable safe guard equipped on two wheeler can be useful

27. Similarly be careful during Diwali Festival

28. Be alert and drive your vehicle slowly. Children may run on the road to light fireworks
29. Avoid traveling through street , society

30. Stop or divert vehicle if major live fireworks are expected on path

Driving in Bad Weather

31. Keep driving speed as low as it can be controlled

32. Turn your headlights on--in rain or fog,. It will help your visibility--and also help other
drivers see you.

33. Keep windows and windshield clear. Make sure wipers are working.

34. Double the space you normally leave between you and the next vehicle. You'll need
more space to stop on slick roads.

35. Brake gently

36. Make sure your exhaust tail pipe is clear if you've had to dig your car out of water pot.

37. When driving on slippery surfaces use gentle pressure on the accelerator pedal when
starting. If your wheels start to spin, let up on the accelerator until traction returns.

38. Leave a window open a little bit to keep windshield from fogging up and to give you
fresh air.

39. Watch for danger spots ahead.

Major factors in accidents

• Speed

• Alcohol and drugs

• Use of cell phones

• Ignoring right-of-way

• Tailgating

• Improper passing and driving to the left of center

• Fatigue

• Reckless Driving
 In the event of an accident:

1. Stop your vehicle in a safe place. Put on your emergency flashers. Warn oncoming
traffic, using flares if available.

2. Send someone to telephone supervisor or main office.

3. Switch off ignition of collision vehicles if engines are still running to reduce the possibility
of fire.

4. Help an injured person if necessary or requested. First protect the person from traffic.
Then cover the injured person for comfort and to avoid shock. Do not move an injured
person unless absolutely necessary. Do not attempt to give first aid unless you have
been trained in it. Be sure someone has called for an ambulance.

5. Do not discuss the accident with anyone. Be courteous to all involved.

Vehicle Inspection

Periodic vehicle inspections shall be ensured by O&M Contractor. A well planned

vehicle inspection will assist, in detecting defects, faulty equipment and violations of
safety or legal regulations. Identification and correction of these hazards will reduce
the potential for accidents, minimize vehicle downtime and reduce overall maintenance
costs.
Each vehicle should be checked and reported should be submitted to concerned
person / in-charge for further action.

• Headlights
• Tail lights
• Turn signals
• Windshield wipers, washers and washer fluid
• Horn
• Reverse Tune / Horn
• Brakes
• Vehicle emergency lights
• Emergency brake
• Seat belts and shoulder straps
• Side mirror
• Tyres
• Windshield Condition
• Vehicle body condition (scratches and dents)
• First Aid kit
• Fire extinguisher
• Emergency warning items (flares)
• Wheel chocks
4.9 Odorant Properties & Hazards

Contents

1. Important properties of Odorant - Ethyl Mercaptan

2. Hazards associated with Odorant

3. Statutory requirements for handling of Ethyl Mercaptan

4. Exposure Limits of Ethyl Mercaptan

5. Emergency Handling for Fire, Spillage of Ethyl Mercaptan

Fire Fighting Measures

Control measures for Spill / Leak Accidental Release,

Safety Precautions for Storage, Transportation and Disposal

First-aid measures

6. Material Safety Data Sheet of Ethyl Mercaptan

1. Important properties of Odorant - Ethyl Mercaptan

Flammability
• Flash Point: -38°F (-38.9°C)
• Auto ignition Temperature: 572°F (300°C)
• Flammable limit in air, by % volume
– Upper 18
– Lower 2.8

Keep away from sources of ignition

Boiling point:
• 35 °C at atmospheric pressure
Vapor density (air = 1): 2.1
Liquid density / Specific gravity (Water = 1): 0.845
• Important hazards associated with Ethyl Mercaptan highly flammability
• Harmful by contact, inhalation & ingestion
• Dangerous to environment (Very toxic to aquatic organisms, spread
unpleasant, intensive, disagreeable odor / smell when released)

2. Hazards associated with Odorant

Fire & Explosion Hazards

• Container may BLEVE when exposed to fire
• EM Vapors are heavier than air and will collect and stay in low area
• Flammable EM vapors, heavier than air, may travel long distances along the
ground to reaching a source of ignition and flashing back.
• EM vapors in confined areas (e.g. tank, sewers, buildings) may explode when
exposed to fire

Electrostatic Hazards
Electrostatic charge may build up during handling. Handling & Storage equipment
must be earthed to avoid static buildup.
Health Hazards
• Irritating to eyes, skin and respiratory tract
• Inhalation may cause headache, cough, labored breathing,
• Ingestion may cause nausea, vomiting, central nervous system depression,
Muscular weakness and paralysis

Electrostatic Measures

Environmental Hazards

Ecological effects
• Very toxic to aquatic organisms
• Intensive smell spreading product
• Avoid release to environment

Hazardous reaction

• On combustion forms: SO2 + CO2 + CO

• Hazardous decomposition products: (H2S + CO2 + CO)
• Avoid contact with strong acids & oxidizers
Ethyl Mercaptan and its container must be disposed of as hazardous waste.
3. Statutory requirements for handling of Ethyl Mercaptan

• Exposure Limits 0.5 ppm as per GPCB Norms, Air act

• No pollution of water as per water act.
• Disposal of drum “waste category 18” as per Hazardous waste rules
• Ethyl Mercaptan - Item 187, in the list of Hazardous & toxic chemicals, part 2
of Manufacture, Storage and Hazardous chemical rules. Compliance as per
Manufacture, Storage and Hazardous chemical rules

4. Exposure Limits of Ethyl Mercaptan

• PEL (OSHA) 10 ppm, 25 mg/m 3, Ceiling

• TLV (ACGIH) 0.5 ppm, 1.3 mg/m 3, 8 hr. TWA
• CEILING = Ceiling Limit (15 Minutes)
• OSHA = Occupational Safety and Health Administration
• PEL = Permissible Exposure Limit (OSHA)
• TLV = Threshold Limit Value (ACGIH)
• ACGIH = American Conference of Governmental Industrial Hygienists
• TWA = Time Weighted Average (8 Hours
5. Emergency Handling for Fire, Spillage of Ethyl Mercaptan

Fire Fighting Measures

Personal precautions
• Evacuate unnecessary personnel.
• Isolate area of release & deny entry
• Keep unprotected personnel upwind and uphill of the spill area.
• Eliminate/ remove all sources of ignition.
• Ensure use of full protective equipment including approved breathing
apparatus by persons performing the clean up operation
• Individuals accidentally exposed to & affected by EM, removed from the
contaminated area immediately to fresh air. Remove clothing and wash
thoroughly affected skin with soap & water.
• Store contaminated clothing in well ventilated area until the odorant has
evaporated or use dilute bleach to remove odor from the cloth
• Provide first aid as needed

Extinguishing Media

• Foam, dry chemical, carbon dioxide, water fog or spray.

• Water may be ineffective, but should be used to keep fire-exposed containers
cool.
• Specially trained personnel operating from a safe distance & wearing
breathing apparatus and full protective clothing can fight fires using foam or
dry chemical. Under favorable conditions, experience crews can use
coordinated fog streams to sweep the flames off the surfaces of the burning
liquid. Keep exposures cool to protect against re-ignition. Do not direct
straight streams into the liquid.
• For container exposed to fire, evacuate the area in all directions because of
the risk of BLEVE. Use water spray to keep Cool fire exposed containers cool
with large quantities of water from unattended equipment to avoid pressure
buildup or BLEVE.
 • Remove intact containers if it can be done safely
• If cooling streams are ineffective (venting sound increases in volume & pitch,
tank discolors or shows any signs of deforming), withdraw immediately to a
secure location

Fire fighting procedure

• Evacuate all unnecessary personnel.

• Shut down motors, pumps, electrical service and Eliminate all sources of
ignition

Control measures for Spill / Leak Accidental Release,

For minor leak / spillage, strong oxidant solution used with detergent

• Sodium hypochloride - NaOCl

• Calcium hypochloride - Ca (OCl2)
• Hydrogen peroxide - H2O2

Warning - Do not bring undiluted chemical in contact with odorant. Risk of

explosion!

For large leak / spillage, use absorbent, Like

• Sand
• Clay
• Sawdust
• Activated charcoal
• Bentonite
After absorbing, disposed in closely fitting containers according to GPCB guidelines.

• Stop the release if it can be done safely from the distance

• Ventilate the confined area if it can be done without placing personnel at risk.
Environmental precautions
• Do not apply water to the leak
• Contain liquids & do not allow entry into sewers and waterways. If material or
contaminated runoff enters waterways, notify downstream users of potentially
contaminated water
• Control loss of volatile materials to the atmosphere. Consider the application
of foam (e.g. alcohol resistant - AFFF) to spilled liquid to control vapors
• For small spills, soak up with absorbent material (dry & inert material like
sand, clay, sawdust) and place in properly labeled containers for disposal.
Safety Precautions for Storage, Transportation and Disposal
Storage
• Protect the barrel from other elements like sharp edges, impact, etc. Store on
the pallet.
• Keep away from heat or direct sunlight which may increase the vapor
pressure inside the drum
• As flash point (-38.9°C) below 20 °C, store in cool, dry, well ventilated area
free from electrostatic charge, sparks, open flames, open light. Electrical
fitting at storage area if any is be explosion proof.
Handling / Transferring

• Keep container closed except when transferring material

• Use in well ventilated area.
• EM residues remaining in container is toxic & explosive. Neutralize it properly
• Wear light breath protection (e.g. filter with charcoal filter) or approved
breathing apparatus for emergency & unknown concentration
• Wear chemical safety goggles plus full face shield to protect against splashing
• Wear chemical resistant gloves such as rubber, neoprene or vinyl.
• Keep emergency shower and eyewash facility in close proximity
• Emergency arrangements

Transportation

• Warning label / Tram card

• Emergency contact number
• Emergency arrangements

Disposal considerations

• Do not dispose of in a sink or in the immediately environment.

• Dispose of in a safe manner in accordance with statutory requirements /
GPCB norms.

Burning of Ethyl Mercaptan residual or its container is not recommended method of

cleaning.
First-aid measures

Eye contact –
Irrigate with water IMMEDIATELY. Flush / rinse eyes with a directed stream of water
for at least 30 minutes, forcibly holding eyelids apart to ensure complete irrigation of
all eye and lid tissue. IF IRRITATION PERSISTS GET MEDICAL ATTENTION.

Skin contact –
Remove and isolate contaminated clothing (including shoes) and wash skin
thoroughly with soap and large volume of water for 30 minutes. For skin burns, after
decontaminate with water, apply clean dry dressing. IF IRRITATION OCCURS, GET
MEDICAL ATTENTION. Wash clothing before reuse.

Inhalation –
Remove immediately from contaminated area to fresh air. If breathing is difficult,
have trained person administer oxygen. If respiration stops, have a trained person
administer artificial respiration - CPR as needed.
GET MEDICAL ATTENTION IMMEDIATELY.

Ingestion –
NEVER GIVE ANYTHING BY MOUTH TO AN UNCONSCIOUS PERSON. Have
patient drink several glasses of water then induce vomiting by having patient tickle
back of throat with finger. Keep airway clear. GET MEDICAL ATTENTION
IMMEDIATELY
6. Material Safety Data Sheet of Ethyl Mercaptan

1. CHEMICAL IDENTITY
---------------------------------------------------------------------------------------------------------------------------------
Chemical Name : Ethyl Mercaptan Chemical Classification : 3
---------------------------------------------------------------------------------------------------------------------------------
Synonyms : Ethanethiol Trade Name : Ethyl Mercaptan.
---------------------------------------------------------------------------------------------------------------------------------
Formula C.A.S. No. : C2H5S / 75-08-1 U.N. No. : 2363
---------------------------------------------------------------------------------------------------------------------------------
Regulated Shipping Name : Ethyl Mercaptant Hazchem No : 3WE/2363:
Identification : Codes / Label : 3.1 / 3
---------------------------------------------------------------------------------------------------------------------------------
Hazardous Waste
I.D. No. : E044
---------------------------------------------------------------------------------------------------------------------------------
Hazardous Ingredients C.A.S. No. Hazardous Ingredients C.A.S. No.
---------------------------------------------------------------------------------------------------------------------------------
1. Ethyl Mercaptan. 75-08-1 3.
---------------------------------------------------------------------------------------------------------------------------------
2. PHYSICAL AND CHEMICAL DATA :
---------------------------------------------------------------------------------------------------------------------------------
Boiling Range / Point : 350C +/- 1 Physical State : Liquid Appearance : Water White
Liquid
---------------------------------------------------------------------------------------------------------------------------------
Melting / Freezing Point : -147.8 0C/-45 0C Vapour Pressure Odour : Unpleasant
@ 37.80C =16.2 psia =838 mm/Hg
--------------------------------------------------------------------------------------------------------------------------------
Vapour Density Solubility in water : 0.70 at 200C Other :
( Air = 1 ) : 2.1
--------------------------------------------------------------------------------------------------------------------------------
Specific Gravity pH : Not Determined
Water = 1 : 0.845
---------------------------------------------------------------------------------------------------------------------------------
3. FIRE AND EXPLOSION HAZARD DATA
---------------------------------------------------------------------------------------------------------------------------------
Flammability : Yes / No LEL: 2.8% Flash Point : -38.9 0C Autoignition: 300 0C
Temperature
TDG Flammability : UEL : 18% Flash Point : -17 0C (CC,ASTM D3243 )
---------------------------------------------------------------------------------------------------------------------------------
Explosion Sensitivity to Impact : Explosion Sensitivity Hazardous Combustion
Not Sensitive to mechanical impact to State of Electricity : Products : Sulphur –
Static charged Dioxide
-------------------------------------------------------------------------------------------------------------------------------
Hazardous Polymerisation : Will Not Occur
---------------------------------------------------------------------------------------------------------------------------------
Combustible Liquid : Explosive Corrosive
Material : Hydrocarbon Material : Sulphur
---------------------------------------------------------------------------------------------------------------------------------
Flammable Material : ------ Oxidiser : ------ Others : ------
---------------------------------------------------------------------------------------------------------------------------------
Pyrophoric Material : ------ Organic Peroxide : ------
---------------------------------------------------------------------------------------------------------------------------------
4. REACTIVITY DATA
---------------------------------------------------------------------------------------------------------------------------------
Chemical Stability : stable
---------------------------------------------------------------------------------------------------------------------------------
Incompatibility With other Material :
---------------------------------------------------------------------------------------------------------------------------------
Reactivity : heat, oxidisers
---------------------------------------------------------------------------------------------------------------------------------
Hazardous Reaction Products : Sulpher Dioxide
---------------------------------------------------------------------------------------------------------------------------------
5. Health Hazard Data
---------------------------------------------------------------------------------------------------------------------------------
Routs of Entry : Skin, Inhalation, Ingestion
---------------------------------------------------------------------------------------------------------------------------------
Effects of Exposure / Symptoms : ( Chronic Effects not known )
Inhalation : May cause headache, coughing, whoezing, inactivity, sedation, breathing and
convulsions.
EYES : Irritating to eyes, causing pain, tearing and general inflammation.
SKIN : May cause irritation with possible redness, edema or drying due skin defatting.
INGESTION : May cause nausea, vomiting, diarrhea, central nervous system depression, muscular
weakness and paralysis.
---------------------------------------------------------------------------------------------------------------------------------
Emergency Treatment :
SKIN : Wash thoroughly with soap and water. Wash clothing before reuse, If Irritation occurs, get
medical attention.
INHALATION : Remove to fresh air, If breathing is difficult, have trained person administer oxygen. If
respiration stops, have a trained person administer artificial respiration. Get medical attention
immediately.
INGESTION : Never give anything by mouth to an unconscious person. Have patient drink several
glasses of water then induce vomiting by having patient tickle back of throat with finger. Keep airway
clear. Get medical attention immediately .
---------------------------------------------------------------------------------------------------------------------------------
TLV (ACGIH) : 0.5 ppm 1.3mg/m3 STEL: ppm:mg/m3 ( Guidelines not developed )
---------------------------------------------------------------------------------------------------------------------------------
Permissible
Exposure Limit : Odour Threshold : ppm mg/m3 ( Not Known )
Acute Oral LD50 ( rat ) : 682 mg/m3 Human odour detection limit : 0.4 ppb
Acute Inhalation LC50 (rat) : 4420ppm (4hrs.)
IDLH : 2500ppm
---------------------------------------------------------------------------------------------------------------------------------
NFPA Hazard Health Flammability : Not Known Stability Special : Not Known
Signals : Not Known
---------------------------------------------------------------------------------------------------------------------------------
6. PREVENTIVE MEASURES
---------------------------------------------------------------------------------------------------------------------------------
Personnel Protective Equipment : Chemical Safety Goggles, Face Shield, Rubber Gloves, Eye
Wash-Shower.
---------------------------------------------------------------------------------------------------------------------------------
Handling and Storage Precautions:
Handling:
• Keep away from sources of ignition. The vapors can travel to an ignition source and flash back
causing a flash fire.
• Avoid breathing vapour, use with adequate ventilation. Wear niosh / msha approved respiratory
protection if there is potential for exposure above the exposure limits.
• Do not get in eyes, on skin or clothing.
• Avoid static built up.
• SPECIAL MIXING AND HANDLING INSTRUCTIONS ;
• Keep container closed except when transferring material.
• Use with adequate ventilation.
• Do not reuse containers.
STORAGE :
• Store in a cool, dry, ventilated area away from heat, sparks and flame.

---------------------------------------------------------------------------------------------------------------------------------
7. EMERGENCY AND FIRST AID MEASURE :
---------------------------------------------------------------------------------------------------------------------------------
Fire Fire Extinguishing Media : Dry chemical, carbon dioxide, foam, water fog or spray. Water
ineffective, but should be used to keep fire-exposed containers.
----------------------------------------------------------------------------------------------------------------------------
Fire Special Procedures : Evacuate all unnecessary personnel. Shut down motors, pumps, electrical
service and eliminate all sources of ignition. Use spray to keep fire exposed containers cool to avoid
pressure build-up, wear self - contained breath apparatus and full protective clothing.
Unusual Hazards : Flammable vapours, being heavier than air, may travel long distance along the
ground before reaching a source of ignition and flash back.
----------------------------------------------------------------------------------------------------------------------------
Exposure First Aid Measures : ( Please refer Point No. 5 - Emergency Treatment).
Antidotes/Dosages : Not Known.
----------------------------------------------------------------------------------------------------------------------------
Spills Steps to be taken : Should always be handled in a closed system. In case of spillage, use saw
dust, dry sand and neutralising solution like hypo chlorite. Suitable Personnel Protective Equipments
to be used. Evacuate unnecessary personnel upwind of the spill area. Eliminate all sources of
ignition, Do not allow entry in sewers and waterways.
Waste Disposal Method : Do not dispose of sink, drain. Dispose in a safe manner in accordance with
local / national regulation
----------------------------------------------------------------------------------------------------------------------------
8. Additional Information / References :
ACGIH = American Conference of Governmental Industrial Hygienists.
PEL = Permissible Exposure Limit ( OSHA )
STE = Short Term Exposure Limit (15 Minutes )
TDG = Transportation of Dangerous Goods. ( CANADA )
TLV = Threshold Limit Value.
IDLH = Immediate Danger to Life & Health.
----------------------------------------------------------------------------------------------------------------------------
9. Manufacturer / Suppliers Data
----------------------------------------------------------------------------------------------------------------------------
Name of Firm : Contact Person
Mailing Address : In Emergency :

---------------------------------------------------------------------------------------------------------------------------
Telephone / Telex Nos.: Local Bodies
Fax Nos. : involved : ----
Telegraphic Address :
----------------------------------------------------------------------------------------------------------------------------
Standard Packing : Imported sealed Barrel
----------------------------------------------------------------------------------------------------------------------------
Tremcard Details / Ref. : -----
----------------------------------------------------------------------------------------------------------------------------
Others : ----
----------------------------------------------------------------------------------------------------------------------------

10. Disclaimer
----------------------------------------------------------------------------------------------------------------------------

Information contained in this material data sheet is believed to be reliable but no

representation, guarantee or warranties of any kind are made as to its accuracy,
suitability for a particular application or results to be obtained from them. It is upto
the manufacturer / seller to ensure that the information contained in the material
safety data sheet is relevant to the product manufactured / handled or sold by him as
the case may be the Government makes no warranties expressed or implied in
respect of the adequacy of this document for any particular purpose.