Natural Gas Emergencies And Fires Flashcards
(140 cards)
1
Q
Natural gas is comprised mainly of?
3
A
Methane, but also contains propane, ethane and nitrogen.
Meth+PEN
2
Q
Natural gas is a hazardous material classified as Class—, Division —.
3
A
Class 2
Division 1
3
Q
Natural gas explosive range is?
3
A
5% to 15%
4
Q
T/F natural gas is colorless and odorless.
3
A
True
Mercaptan is added to give it a
ROTTING smell
It does not use the words Rotten Eggs in this paragraph.
5
Q
What is lighter natural gas or air?
3
A
Natural gas is significantly lighter than air
6
Q
T/F
Natural gas is considered non-toxic
3
A
True
But sufficient quantity Natural gas can displayed oxygen in an enclosed space and cause asphyxiation.
7
Q
When natural gas ignites it undergoes a?
3
A
Rapid increase in volume
8
Q
Natural gas.
—- feet of natural gas has approximate energy potential of —— pound of TNT.
3
A
2 cubic feet
1 pound of TNT
(Same numbers as Class/Division 21)
9
Q
T/F
Natural gas gate stations usually have on-site personnel.
4.1
A
False
Remote Monitoring by the utility companies, gas control centers, but generally have
No permanent on site personnel.
10
Q
Natural gas high-pressure distribution mains are made of which two materials?
Medium and low pressure distribution mains are made up of
3 materials? 4.3
A
Steel or plastic
Steel , plastic or if older cast iron.
11
Q
T/F
High and medium pressure distribution gas mains have controls valves that are exercised fully on schedule to ensure working order.
A
False
Partially
12
Q
High and medium pressure distribution mains the valves are usually found near where? 4.3.
A
Generally found near street corners, but may also be located along the street or on the sidewalk.
13
Q
Natural gas.
Main valve covers are larger than curb valve/service valve covers to allow for servicing and maybe what shape? 4.3.
A
Round or square
14
Q
Con Ed Gas main valves have what identification markers? 4.3.
National Grid are ID by?
4.3
A
Con Ed
ID numbers on tags inside of the valve cover.
National Grid ID number stamped on the North side of the collar, underneath the cover, these numbers may be difficult to see.
National/North both start with N
15
Q
Low pressure distribution mains, how many psi?
4.3
A
1/4 psi
16
Q
T/F
Low pressure gas distribution means generally do not have valves or isolating sections. Requiring plug-in or squeezing off the pipe while still under pressure FD can plug.
4.3
A
False
Sparking Hazards
17
Q
Gas service pipe generally runs at—— angles off of the distribution main into the building.
4.4
A
Right Angles
18
Q
T/F
There is always a curb valve/service valve( below grade) or an exterior gas valve ( above grade) between the distribution main and the building. 4.4.
A
Usually a curb
19
Q
Natural gas. Curb valves/service valves are usually found on the
——side of the curb.. They will shut down the entire building.
4.4
A
Sidewalk side
20
Q
Natural gas. Curb valves are usually recessed in from the curb and are covered by a ——-X ——-square or round brittle concrete or steel cover, which may be sitting on top of plastic or wooden plate. 4.4
A
4x4 square or round
21
Q
T/F
On the National Grid Gas
“Long service “system the curb valve/service valve is sometimes located across the street from the building it supplies and maybe found in the street. It can be identified by an arrow cast into the cover pointing in the direction building supplies. In the pic it’s a round cover for the valve 4.4.
A
True
22
Q
If you see a ”NC” stamped on a tag near the service meter indicates there is?
EFV tag near the meter indicates ?
4.4
A
NC=No curb valve or service valve.
EFV =Excess flow valve exists in line on the service pipe.
23
Q
Where do you find head of service valves? 4.4.1
A
Typically the first valve after the curb valve, they are always before the meter and are generally located either on the interior or exterior of the building near the point of entry.
24
Q
Typical House appliance pressure is—- psi?
If you commercial customers receive gas at — to —- psi.
4.4.2
A
1/4 for house
(1/4 turn valve to turn on/off)
1-3 for commercial
25
T:F
Gas
Service regulators are usually located after the gas meter on MEDIUM and HIGH-pressure systems to reduce to low pressure 1/4 psi
4.4.2.
Before the meter
26
Peck vents installed on system supplied by ——- or —— pressure to vent excess gas to the exterior if the service regulator fails.
May have a red cap
There should normally be no odor of natural gas at the Peck
4.4.2.
Medium or high
27
Gas
Before the meter there should be —- turn meter valve that controls the supply of natural gas to the meter. 4.4.3.
1/4 turn
28
T/F
The presence of gas piping or meters in a public hallway requires appropriate enforcement action. Refer to BISP manual.
4.4.3.
True
29
T/F. What is considered a major gas emergency?
1 Serious damage to major components of gas infrastructure such as master meter service in many appliances, gas service pipe, main valves, distribution means, etc.
2- 10% LEL or greater detected outside or inside.
3- Elevated natural gas reading 20% LEL or greater in an unvented, sub surface structure, such as manhole or sewer, etc.
4- Gas present in 3 or more sub surface structures .
5-Indications of gas migrating into building from an outside source.
Gas leaking inside of a structure and the controlling valve cannot be located or is in operable.
6- Gas leaking or present inside of a wall or void in a structure.
5
4- 2 or more sub surface structures
2 is also in 20% LEL in subsurfaces
30
Major gas emergency.
— % LEL or greater detected outside or inside.
Elevated natural gas reading —%LEL or greater in an unvented, sub surface structure, such as a manhole.
5
10% LEL or greater detected inside or outside
20% LEL or greater in unvented, subsurface structures (manhole,
sewer)
31
Major gas emergency.
Gas present in —to— sub surface structures, such as manhole sewer
5
2 or more
20% LEL in sub surface
32
Gas utility company responses times are monitored by whom?
And are typically within— minutes? 6.1.
New York State public service commission.
Within 30 minutes
33
Gas leaks for apparatus positioning. If a strong odor is present on approach, stop and meter the area. If the meter displays.—% of the LEL, this may indicate a potentially seriously leak and require treating the incident as a major gas emergency 6.2
10% of the LEL.
34
The apparatus ——- be position in front of the reported leak location. Units should avoid positioning over manholes and sewers. 6.2
Should not be
Additional units shall stay at street corners and only enter into the block when appropriate.
35
Gas emergencies.
Vent holes are otherwise known as ———— or a series of roughly 1 inch holes in the payment and indicate recent gas utility work. 6.3.
prospecting “bar” holes
1 inch
36
The natural gas DETECTOR detects natural gas at—— levels. For this reason it is this superior tool for locating leaks in appliances, supply piping, and points of entry into a building.
The natural gas METER is a superior tool for identifying areas in which ?
6.4
Low levels
It’s no longer safe to operate
37
For natural gas meters the best practice is to measure readings at a location, ——and ———of the room of the suspected leak. This is the percentage LEL to be reported to the IC. 6.4.
High and middle of the room for METERS
Don’t get this confused with Gas
DETECTORS
38
The first priority at a natural gas emergency is ensure that there is not a ————.
6.5
Major gas emergency
39
Gas emergencies.
Do you use detectors or meters to investigate sub surface structure such as manholes and sewers?
6.5 1. Page 18
Use both detectors and meters
40
T/F
Gas emergencies.
Points of entry (POR)
are commonly located in the Meter Room. But may be found elsewhere in the building sub surface. Gas leaks often enter via these points. 6.5. 1 page 18
True
41
Natural gas emergencies.
Inside calls:
When a detector activation AND meter reading were present, it is not acceptable to leave the scene of an order of gas response after the odor has dissipated without?
6.5. 2 Page 19
Mitigation or coordination with the utility company reps
42
Inside Calls;
If natural gas is present in a HVAC system examine?
6.5. 2. Page 19
Rooftop
Setback HVAC equipment even if remote
Shut down HVAC fans and determine if the odor dissipates. This may indicate a leak at HVAC equipment or near the air intake for the HVAC system.
43
Ladder company inside team. If any natural gas levels are displayed on the natural gas METER upon entering the building or while proceeding to the reported location within the building, the inside team should proceed directly to?
6.5 2. Page 20
The basement/celler to evaluate conditions.
Note: It says nothing about Detector
ACRO: Meter means go to Meter Room. M&M
44
Engine company arrival prior to ladder company:
Activate natural gas METER prior to entering building
Report meter/detector activity to Ladder and Chief.
Remaining engine company members should prepare to stretch a hose line positioned ——- of the potential blast zone.
6.5 2 page 20
Outside of
45
Remove ignition sources near the leak utilizing a ——— shut off. Removing power will cause a spark at the switch, which should only be done outside the area that is ——the explosive range. 6.7.2.
Remote
Within
46
A leak or break in—— pressure gas piping may be stopped or greatly diminished by taping or stuffing putty, rags paper, etc. into the break
6.7.3
Low pressure.
PS this tactic will not work on medium or high-pressure piping BEFORE the service regulator
47
Will you find plastic used for gas piping for outside use?
6.7.3
Yes, permissible by code and SHOULD not be touched due to static electricity.
48
T/F
Plastic gas piping must not be touched or approached?
6.7.3
False
Should not be approached.
49
What is the priority order of valve closures for gas?
Page 22 to page 26
Appliance
Interior Gas Riser Valve
Individual Meter Valve
Master Meter Valve
Head of Service
Curb Valve/ Service Valve
Main Valve
(ARIMHCM)
Al Reilly In March Has Cash Money
March Has Cash (consider major gas emergency)
50
Where do you find the interior gas riser valve? Page 23
In the basement/celler near the ceiling
51
T/F Master Meter Valve, when possible avoid shutting the master meter valve if it affects many occupancies/appliances.
When possible, prior to shutting a master valve, notify the utility company and inquire as to possible alternatives. Page 23.
True
52
T/F Head of service valve, regardless of its location on the interior or exterior of the building it will always be located before the building meter. Page 23.
True
53
T/F If the head of service valve is located on the interior it will be found just inside the building where the natural gas enters. POE.
Page 23
False
In most cases
54
T/F If the head of service valve is located on the exterior of the building, it will be found on an exterior gas riser near the location that the gas service enters the building. POE page 23.
True
55
T/F
Head of service valves, control all of the gas supplied from that gas service to the building. Shutting the head of service will shut gas to all of the meters supplied by that gas service. Page 23.
True
56
Curb valve/service valve.
We are authorized to shut them down and should only be done as your last resort and ———.
Page 24
In consultation with the utility company.
57
T/F Curb valve/service valve on a low pressure system becomes
inoperative, mitigation of the leak will involve a utility company construction crew. Ripping up the street to isolate/repair the leak. Page 24
True
58
T/F
If the curb valve/service valve of a medium or high pressure distribution system becomes
inoperative, mitigation of the leak will involve shutting the MAIN VALVE, possibly disrupting a large area, which may include critical facilities. Contact the appropriate UTILITY COMPANY CONTROL CENTER when necessary to control a leak using the cover valve/service valve. Page 24.
True
This is in capital letters in the books
UTILITY COMPANY CONTROL CENTER
UCCC
59
Where is the curb valve/service valve usually found?
And what does it shut down?
Page 24
Usually found on the sidewalk side of the curb but maybe in the street.
Shut down the entire building
60
The curb valve/service valve cover is what size?
What is it made out of?
Page 24
4x4
Square or Round brittle concrete or steel sitting on top of a plastic or wooden plate. Remove or break cover.
Sometimes they are covered with grass or concrete
61
When using the gas shut off key what must be done prior to turning?
Page 24
Place chalk or some other mark near the valve to indicate the start point. This will assist in noting when a 1/4 turn is complete.
62
Curb valves/ service valves for national grid. Do they supply a gray plastic insert for shutting down plastic valves? Can be easily broken if used with excess force.
Page 24.
National grid has white plastic inserts.
Con Ed a plastic curb valve/ service valves, use the gas key as is.
63
When closing a curb valve\service valve use what tools? Page 25.
Gas shut off key and Halligan tool for leverage
64
Is the FDNY permitted to shut down the Main Gas valve?
Page 25
No
65
T/F Con Ed Main Valves should have a tag inside of the valve cover with an ID number, indicating these are NOT curb valves/service valves
Page 25
True
Remember: National Grid Main Valves can be ID by ID number stamped on the NORTH side of the collar underneath the cover, indicating these are NOT
curb valves /service valves
66
Consider treating incidents as a major gas emergency when shutting down which valves? Page 25.
Master meter valve
Head of service valve
Curb valve/service valve
67
Where are main valves usually located? Page 25
On the STREET SIDE of the curb and are used to isolate large sections. They can look like a curb valve/service valve but control distribution lines usually running underneath the street. These lines can also be found under sidewalks and unpaved areas.
68
Can the FDNY shut down a main gas valve?
7 Page 25
No
Same rule applies to exterior steam valve outside of building
69
Main gas valves, the cover is what shape?
And what size?
Page 25
Round or Square
Typically 9 inches or larger
Remember, Con ED has a tag inside of the valve housing with an ID number.
National grid identified by an ID number stamped on the north side of the collar underneath the cover however, these numbers may be difficult to see.
70
T/F
Shutting down a single main valve will stop the flow of gas since distribution piping is fed from One Direction
page 26
False
may not stop the flow of gas because distribution piping can be fed from more than one direction.
71
Shutting down a main gas valve can disrupt service for?
Page 26.
It could take several weeks to be restored.
72
**Main gas valves are usually not present on —— pressure gas systems. Stopping the flow of gas in a —— pressure main will require the street mains to be excavated and stoppers installed, which could take several hours.
Page 26
Low
Low
73
T/F Transfer of operation to utility company. Remain on the scene until no natural gas remains, zero readings are you meter, no activity on detector, gas odor dissipated. Etc. if given a reasonable ETA by the utility company and adequate resources are available the IC should consider having a unit remain on scene, awaiting the utility companies response. Page 26.
True
74
T/F
New**Request to assist gas utility company with entry. FDNY units are directed to force entry into such premises in the absence of emergency conditions such as positive meter readings or gas odor. Page 26.
False
Don’t force entry
U need positive meter readings
or
gas orders.
75
Gas Bulletin.
No readings
No odors
Con Ed wants door open?
Page 26
No forcible entry
76
Major gas emergency.
Serious damage to ——- components of gas infrastructure such as Master Meter servicing many appliances, gas service pipe, main valve distribution means 7.1
Page 27 7.1
Major components
77
Major gas emergency.
—— LEL or greater detected outside or inside.
Page 27 7.1
10%
78
Major gas emergency.
Elevated natural gas reading —% LEL or greater in an unvented, sub surface structure, such as a manhole, Sewer, etc. page 27
20%
79
Major gas emergency.
Gas present in —- or —— sub surface structures.
7.1 page 27
2 or more
20% LEL
Look for the 2’s
80
Major Gas emergency.
T/F
Indications of gas migrating into a building from an outside source
7.1 page 27
True
81
Major gas emergency.
Gas leaking inside of a structure and the controlling valve cannot be located or is inoperable.
7.1 page 27
True
82
Major gas emergency.
T/F Gas leaking or present inside of a wall or void in a structure.
7.1 page 27.
True
83
Brand new
What code do you give for a major gas emergency?
Request who?
7.3 Page 28
10-75 and request hazmat response specifying a major gas emergency
84
85
Major gas emergency has been transmitted, report to where? 7.3 page 28.
Staging area.
The officer if not put to work by the IC should be staging area manager until relieved by the assigned Batt Chief designated as a staging area manager.
86
Major gas emergency strategy. Outside leak. For stopping a leak from a ——- pressure main will general require the utility company, construction crew plug or clamp squeeze the pipe to interrupt natural gas flow.
8 page 29
8 page 29
Low
87
T/F
Outside gas leak. Medium and high-pressure the proper procedure is.
Established Command post at a safe location and announce it over HT and department radio.
Evacuate the affected area and search for victims.
Control vehicle and pedestrian traffic to prevent entry into the operational area. Plan for necessary access for utility company vehicles.
Check sub surface structures, and surrounding basements cellers for gas infiltration.
Precautionary hose lines, large caliber streams should be considered for defensive use. If natural gas ignites do not extinguish the fire, water accumulation can impede isolation and repair.
Remove ignition sources within the limits of safety. Coordinate with the electric utility company directly or through Dispatch.
Locate Valve locations if inside the potential blast zone. Page 29
False
Locate valve locations if OUTSIDE the potentially zone.
88
Subsurface gas leaks.
T/F use meters to determine how much natural gas has accumulated the gas readings and extent to which the gas has traveled. From this an estimate can be made as to the location size of the potential blast zone. Evacuate this area keep all personnel, including responders and utility company personal out of the potentially zone except for direct life, saving efforts. Page 30.
True
89
T/F Subsurface gas leak.
Command post outside of the potential blast zone and announce location over the HT and department radio.
Evacuate the affected area and search for victims.
Mark the potential Blast zone with Red (danger do not enter tape) and announce the potential blast boundaries over HT and department radio.
Control vehicle and pedestrian traffic to prevent entry into the operational area. Plan for necessary access of utility company vehicles.
Meter readings should be taken at sub surface structures Snow, or frozen ground can trap it underground.
As rapidly as possible surrounding below grade areas of adjacent buildings should be surveyed with meters.
Precautionary hoselines as necessary.
Remove ignition sources within the limits of safety coordinate with electric utility company directly or through Dispatch.
Locate valve location if OUTSIDE of the potential blast zone. Page 30.
True
90
Inside gas leaks.
If the natural gas meter displays any readings at the building entrance/ first floor the ladder company inside team should go directly to?
3
Basement/celler to investigate do not delay by going to a caller on another floor.
91
T/F
Indoor gas leak is found and can be controlled by valve or low pressure service or medium, high-pressure service before the service regulator by tapping/ plugging then do so. Page 31.
False
AFTER the service regulator
92
Inside gas leak is found and levels are kept at less than— % LEL by venting, you may continue to operate.
Less than 80%
93
Inside gas leaks if it found levels can be kept at less than 80% LEL remove ignition sources such as breakers, pull fuses, shut off gas appliances, etc. Only if this can be done from an area, not within explosive range. Page 31.
True
94
Inside gas leak is FOUND if it anytime gas levels reach—% of the LEL or higher treat the affected area as a ——— ——- ———Page 31.
80% of LEL or higher
Potential blast zone
PS if NOT FOUND and gas reaches less than 10% of LEL treat as potential blast zone.
95
Inside gas leak is found. If it is suspected that natural gas has been leaking for a CONSIDERABLE amount of time is likely trapped in a void space treat affected area as a
——- ——- ——-. Page 31.
Potential Blast Zone
96
Inside gas leak not found. Investigate the structures natural gas meters, if one is showing high gas flow, shut it using the meter valve, head of service valve or carb valve/service valve. When possible shut the valve closest to the leak. Page 32.
True
97
Inside gas leak NOT FOUND treat affected area as a potential blast zone if levels cannot be limited to less than ——% LEL by venting and
Leak not found
Leak from outside, subsurface source. Page 32.g
(NOT FOUND) Less than 10% LEL
PS IF FOUND 80% or higher of LEL treat as blast zone.
Cross reference with Card 94
98
Gas emergencies.
What will be the identifier for the potential blast zone?
9
Red
“Danger do not enter “
tape
99
Major gas emergency.
The size of the potential blast zone shall include the area likely to be affected by?
9
Structural collapse
100
Major gas emergency tactics.
Do not enter a potential blast zone to move apparatus.
9
True
101
Major gas emergency tactics
T/F The potential blast zone will only include will include the actual building and adjacent buildings?
9
False
The blast zone will include streets,yards, or alleys on all sides of the involved building. Exposures may be included in the potential blast zone if likely to be affected by an explosion.
102
T/F Major gas emergency tactics. Other agencies should be prevented from entering the potential blast zone unless they are involved in direct, life-saving procedures, this includes utility company personnel. 9
True
103
T/F Major gas emergency tactics. Natural gas levels in surrounding areas should be absent as the potential blast zone is redefined based upon all information gathered before allowing any members, including utility company personnel back in. 9
False
Absent or LOW
104
Major gas emergency tactics.
The potential blast zone shall be considered a —— ——- for all personnel and shall only be entered for direct life-saving purposes.
9 page 33
An Exclusion Zone
105
T/F Gas Operations INSIDE of the potential blast zone.
Quick evacuation of likely occupants.
Minimum exposure of members.
Minimum time spent in the potential blast zone to obtain the first objective. 9.1
True
106
Gas operations inside of the potential blast zone.
T/F Removing ignition sources and venting are options within the potential blast zone. 9.1.
False are not options within the potential zone.
107
Gas operations inside of the potential blast zone.
Other than rapid evacuation and venting no other actions inside of the potential blast zone should be warranted. All members should strive to GET OUT of the potential blast zone. 9.1. Page 33
False
We don’t vent or remove ignition sources within the potential blast zone.
108
T/F Gas safety inside of the potential blast zone.
No doorbells. Knock on doors.
Avoid standing on doormats INSIDE/ OUTSIDE of the building, avoid carpeted areas.
Known life hazards and people needing assistance should be helped using standard removal techniques. Minimize the time spent inside of the potential blast zone.
Ensure only intrinsically safe equipment is utilized. 9.1.1.
False
Says nothing about Exterior doormats
109
T/F
Intrinsically safe equipment are
HT’s
Natural gas detector
Natural gas meters
Flashlights
SCBA (NEW)
9.1.2
False
FDNY Flashlights
PS power on and power off in a clear environment and remain on until returned to a clear environment.
110
Which are considered intrinsically safe?
TIC
Ventilation fans
Cell Phones
Megaphones
9.1.2
None are intrinsically safe.
PS megaphones can be used OUTSIDE of the potential blast zone to issue instructions to PUBLIC.
111
T/F Rapid evacuation at gas emergencies, should be done through available stairways. Elevators should not be used.
9.1.3
True
112
T/F Rapid evacuation at gas emergencies.
Forcible entry should not be done in these situations. 9.1.3.
False
Except for KNOWEN life hazard.
PS use equipment that will not create a spark
No conventional forcible entry
113
Rapid evacuation at gas emergencies. What are the acceptable ways to force doors? 9.1.3 page 35
Adz End
Or
Ram
114
Rapid evacuation at gas emergencies.
No USE of cell phones or any other electronic devices in the potential blast zone. 9.1.3 page 35.
True
115
Rapid evacuation at gas leaks. Can elevators be used. 9.1.3 page 35.
Gas leak on the UPPER floor of a high-rise RESIDENTIAL building FDNY members can utilize elevators to evacuate people. Elevators in the potential blast zone not to be used by civilian or FDNY personnel.
116
Rapid evacuation at gas emergencies. After occupants have been evacuated what is the next recommended step? 9.1.3 page 35
It is recommended that members quickly Meter sewer, manholes, and cellers as they retreat from the original operating area after evacuating occupants.
117
Rapid gas emergency evacuation use 10 codes in preliminary and progress reports concerning the extent of evacuation required and the need of assistance to other agencies?
False
Use Plain Speak
118
Gas emergency operations outside of the potential blast zone.
1 3/4 hose and large caliber streams are appropriate for these defensive positions. 9.2.1.
2 1/2 hose and large caliber streams for defensive positions and reach.
All this should be outside of the potential blast zone.
119
Gas Operations outside of the potential blast zone. Fog streams should be used to dissipate natural gas venting outside of a structure. 9.2.1.
False
Fog stream should not be used to dissipate natural gas venting outside of a structure. Let the gas vent naturally.
120
Gas operations outside of the potential blast zone. What type of line should be used when workers are placing a plug or operating the clamp on a gas line 9.2.1.
CHARGED Fog hoseline when required and consistent with safety. Used to protect workers placing the plug or clamp.
121
T/F
In all cases the IC has the responsibility and authority to disapprove this tactic of a charged fog hoseline when it places, utility company personnel or FDNY members at risk. Consult with the utility company to consider risks and options. 9.2.1 page 35
True
122
Major gas emergencies. Power removal, if FDNY members can remove power from the area of the leak before natural gas readings reach—% LEL it —— be done. 9.2.2.
Before 80%
Should be done
PS to determine this explosive readings, must be taken wherever the highest concentration of natural gas has accumulated in the building. This is usually,but not always, near the source of the leak..
123
T/F Major gas emergencies. Power removal.
Readings solely taken in an area remote from the leak cannot be used to determine it is safe to cut power.
If any readings display levels of greater than 80% LEL or the opportunity to cut power has expired.
When unable to locate the source of leak do not shut power. 9.2.2.
False
Levels of 80% LEL or greater
124
Major gas leaks. Power removal. After evacuation and upon consultation with the utility company that IC may consider allowing the utility company to cut power remotely from a utility pole or manhole even if natural gas levels are in the explosive range when the following conditions are met:
All persons including FDNY and utility company personal remain withdrawn from the potential zone. It is important to remain aware that remote power removal may trigger an explosion.
The location from which the utility company is cut power is located within the potential blast zone. 9.2.2.
False
Not located within the potential blast zone.
125
Major gas leaks. Locating valves.
When conditions permit units may assist the utility company in locating valves and valve covers.
IC may be able to receive the general location of main valves by contacting the utility company control center. Access problems, such as dumpsters vehicles, etc. can be identified and resolved early.
Main valves have identification codes either on the collar underneath the valve cover or on the tag under the cover. These codes should be relayed to utility company control center and utility company members on scene.
FDNY members should be reminded not to operate any valve on the ——- —— of the curb valve/service valve also known as the main valve. 9.2.3.
Supply side of curb valve
126
Major gas leaks. Ventilation.
If previous ventilation efforts have failed to prevent the area from becoming a potential blast zone —- or more LEL gas leak located known or —-or more LEL gas leak location unknown then the emphasis should be on RAPID evacuation, not ventilation. 9.2.4 Paidge 37.
80% or more known location
10% or more unknown location
127
T/F
Major gas leaks. Ventilation no area can be considered “too rich to burn” as these areas at some portion of the affected space are in the explosive range and will explode and involve the entire area if an ignition source is reached 9.2.4.
True
128
Major gas leaks. Ventilation.
———— ventilation indoors is venting of windows and doors as they are passed is permissible if doing so will not delay evacuation. Do not remain in a potential blast zone simply to ventilate. This is done by rapid evacuation teams. 9.2.4 subsection 1page 37.
Natural Ventilation Indoors
129
Major gas leaks. Ventilation.
What is mechanical ventilation, indoors?
9.2.4 subsection 2 page 37.
When HVAC intakes of a building are exposed to an outdoor natural gas leak, fresh air supply fans should be shut down to prevent drawing gas in. Consult with Building engineers or confident in house personnel.
130
Major gas leak. Ventilation. Natural ventilation sub surface structures.
Sewer manhole covers may be removed by FDNY personnel with approval of an on-scene ——-.
9.2.4 subsection 3 page 37
Chief Officer
131
Natural ventilation. Sub surface structures.
———electric manhole covers can be removed by FDNY personnel only when all of the following conditions are met
Requested by an on scene ——— ——.
Approved by an on-scene —— —-.
The cover has been determined to be free of stray voltage by the —— —-..
9.2.4 subsection 3 page 37
Card 1 of 2
Round electric
Utility Company Worker.
Chief Officer
Utility Company
132
——- manhole covers can be removed by two firefighters utilizing manhole hooks.(Who) ——-carries two hooks for use of this purpose.
——- or ——— electric manhole covers shall not be pulled by FDNY personnel.
9.2.4 subsection 3 page 37
Round
Battalion
Rectangular
Square
133
Can you pull an electric manhole cover if you see fire coming from it?
Can you pull an electric manhole cover if you just see smoke or arching is observed in electric manhole or transformer revolt? 9.2.4 page 37.
No
No
134
T/F
Major gas leaks, caution should be used before re-entering buildings that are in the potential blast zone. 9.2.4 subsection 4 page 38.
False
Extreme Caution
Bold print in the books
135
Major gas leaks, if there are indications that natural gas is migrating through a sewer system notify —— or —- can provide info as to the run of sewers in the area.
9.2.4 subsection 10 page 39.
NYCEM or DEP
136
T/F Major gas leaks, the officer at the staging area will be staging area manager until relieved by an assigned chief officer designated the staging area manager. 9.24 subsection five page 41.
True
137
Major gas leaks, additional resources.
Con Ed above ground is called ——.
Con Ed below ground is called ——.
National grid above ground ——.
National Grid below ground ——.
11 subsection 2 page 42
Gas Distribution Services
Gas Construction Crews
Customer Meter Services
Gas Field Operations.
PS calling for a construction crew should be sufficient for below work.
ACRO DC Mother Fuckers
138
Major gas leaks if a curb valve/service valve fails on a low pressure system. What is the next step?
11 subsection 2 page 42
Construction crew will be required.
139
Major gas leaks, any unit observing the arrival of first on scene utility company crew or supervisor should report the arrival to — and informed the utility company member to report to ——
11 subsection 2 page 42
IC
FDNY IC
140
Major gas leaks, NYCEM will have what information for the gas utility companies. Two things?
11 subsection 3 page 43
Water/Sewer underground infrastructure
