HomeMy WebLinkAboutCONFINED SPACE ENTRY PLAN 11-3-15Location: Hungrys Market
3711 Mt. Vernon Avenue
Bakersfield, CA 93306
Contractor: Sessions
13216 Cheyenne Mountain Drive
Bakersfield, CA 93314
(661) 833 -9501
Date: November 3, 2015
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J
Site Specific
Confined Space Entry
Safety Plan for
Underground Fuel Storage Tank Inspection & Repair Operations
Hungrys Market
3711 Mt. Vernon Avenue
Bakersfield, CA 93306
1.0
INTRODUCTION
EMERGENCY CONTACTS
2.0
SITE PREPARATION
3.0
VENTILATION .
4.0
TANK AIR MONITORING
5.0
JOB HAZARDS
6.0
PERSONAL PROTETIVE EQUIPMENT (PPE)
7.0
EMPLOYEE TRAINING
8.0
TANK ENTRY & HOT WORK REQUIREMENTS
9.0
TANK REPAIR (FIBERGLASS OPERATIONS)
10.0
SAFETY - RELATED DOCUMENTATION
11.0
EMERGENCY PLANNING
12.0
REFERENCES
Appendices
A Confined Space Entry Permit Form
B Hot -work Permit Form
C Safety Meeting Form
D Confined Space Job Functions and Responsibilities
E Underground Tank Work Safe Work Practices
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1.0 INTRODUCTION
This confined space health and safety plan address the activities associated with entering an
underground gasoline storage tank in order to conduct a tank leak inspection and leak repair. The
project location is:
Hungrys Market
3711 Mt. Vernon Avenue.
Bakersfield, CA 93306
Mike Wannes, 661-575-7858
The tank repair project will be conducted/managed by:
Sessions
13216 Cheyenne Mountain Drive
Bakersfield, CA 93314
Contact: Ross Sessions Office (661) 833-9501 Cell (661) 978-5059
Tom Allen of TA's Tank Inspection and Welding Services is the tank inspector. TA's Tank
Inspection and Welding Services will, inspect the tank to determine suitability for being repaired.
The project involves repair of a gasoline tank. The tank is an underground, 10,000 gallon Owens
Corning fiberglass tank which is suspected of having a leak.
The tank is a stand-alone tank, i.e., there are no other tanks connected or sharing lines. We will
excavate to the top of the tank and cut the tank open for access.
The tank will be emptied to the extent practicable before any work on the tank begins.
Entering the tank requires compliance with confined space entry procedures specified in this plan,
including: completion of confined space entry permit, constant ventilation and periodic and
frequent air monitoring for hazardous tank atmospheres (oxygen deficiency, combustibility,
gasoline vapors).
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EMERGENCY CONTACTS
I Company o,r..Agency :1:. Phone Number I
Police Department
911 Emergengy
Fire Department
911 Emergengy
Bakersfield City Fire, Kris Karns
661496-3706
California Occupational and Health
Administration (Cal/OSHA)
661-588-6400
2.0 SITE PREPARATION
The gasoline tank will be emptied of product before contractor arrives on-site. Tank isolation and
hazardous energy control procedures will be conducted before any entry operations begin.
Specifically, tank electrical lines, fill lines, dispensing lines, interconnections and vent lines will be
isolated from the tank so that the entrant workers cannot be affected by them. The electrical
circuit will be identified, turned off, and locked out/tagged out (see attached procedural for more
detail).
The pipes attached to the tank will be plugged from outside the tank if possible, however,
occasionally, the pipes can only be accessed from inside the tank. Locating such pipe openings
and plugging them is the first operation to be carried out by the tank entrant upon initial entry
(along with initial interior air monitoring).
The contractor will check the tank visually and use a stick gauge to determine residual amount of
product remaining. Any recoverable residual fuel or water will be collected and pumped out of the
tank using a double-diaphragm pump before any work on the tank begins. Two fire extinguishers
will be placed near the tank work location.
Ventilation equipment, pump motors and suction hoses will be bonded to the tank and grounded
to control static electricity. A small amount of water may be introduced into the tank to float any
remaining product so it can be pumped from the tank. The product piping for the tank will be
disconnected and blanked off. All tank appurtenances (incoming lines, pumps, electrical lines,
switches) will be shut-down and locked and tagged out. The tank is a stand-alone tank; no inter-
tank connections are expected.
After the manway cover is removed, the tank interior will be visually inspected from on top. There
should not be any significant free liquid. If free liquid is observed, either remove the liquid by
pump or continue to ventilate the tank (evaporate a small amount of liquid) or introduce sorbent
materials to capture the liquid. When there are no longer significant free liquid in the tank, the
cleaning process can begin.
Generally there is a small amount of petroleum sediment or sludge in the bottom of a tank. The
amount can vary from almost none to several inches. The standard gross cleaning method is for
a tank entrant to manually remove the sediment using a non-sparking bucket and shovel (non-
ferrous). The bucket is removed from the tank by a worker stationed on top who pulls up the
4 11-3-15
bucket using a rope.
The tank entrant must scoop up and unload the sediment into the bucket slowly. Conducting the
cleaning operation too quickly can lead to unacceptable atmospheric conditions and immediate
removal of the entrant from the tank. When the residual gasoline is removed to the extent
practicable and air monitoring results are acceptable, tank inspection and repair operations can
begin.
The tank work and access locations will be isolated by fencing or suitable barricade, cones or
caution tape. The perimeter should be at least 25 feet from the tank work area. No smoking
will be allowed within the designated work area perimeter at the site. No smoking signs will be
placed on the perimeter.
Unauthorized persons will not be permitted within the isolation perimeter. A visual inspection will
be conducted by the on-site Supervisor to ensure that the site preparation activities and hazard
controls have been adequately implemented.
In general, underground storage tank interiors are initially classified as a "permit-required confined
space." This classification requires con ' stant ventilation, periodic air monitoring, supplied-air
respiratory protection equipment, an attendant (safety standby) and harness with a lifeline and
extraction device.
After the tank is thoroughly cleaned and ventilated, the classification may be changed to
"alternate-procedures confined space," consistent with the California Occupational Safety and
Health Administration (Cal/OSHA) confined space procedures. Such a classification change is
based on specific conditions and air monitoring results.
It is appropriate to classify a confined space as an alternate procedures confined space if the
space has pW1 actual or potential atmospheric hazards and monitoring shows that the ventilation
is adequately controlling potential atmospheric hazards.
Sessions considers an alternate-procedures confined space classification acceptable when
atmospheric conditions are 20.9 % oxygen and 5% lower explosive limit (LEL) or less for
combustibility (Cal/OSHA allows up to 10% LEL).
An alternate procedures confined space does not require supplied-air respiratory protective
equipment or use a lifeline and harness and extraction device. Note that an attendant will still be
used to observe all tank entry operations.
3.0 VENTILATION
3.1 Inner Tank
Constant tank ventilation is required for confined space entry. Tank ventilation will be provided by
attaching an 875 cubic feet per minute (cfm) eductor ventilation eductor to the fill pipe opening at
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the tank. Due to the size of the tank, a second 875 cfm eductor will also be used, located at a tank
opening at the other end of the tank.
If this is not possible, additional ventilation will be introduced into the tank at the manway. At this
rate, a 20,000 gallon tank requires about 90 seconds to complete an air exchange or about 40 air
exchanges per hour. The sump pump opening will be open to allow for ventilation make-up air.
The ventilation equipment will be bonded to the tank to prevent static electricity accumulation.
The ventilation equipment and tank will be grounded to a metal pipe or rod which is buried or
penetrated into the earth. Fill or drop tubes will remain in place to ensure that air is drawn and
exhausted from the bottom of the tank. Exhausted tank air will discharge at least 10 feet above
ground level.
Note that ventilation will not render a confined space safe for entry if there are significant residual
combustible liquids remaining in the space. If tank ventilation does not result in an acceptable
atmosphere in about two hours, it is likely that there is still a significant fuel source in the tank
which needs to be investigated and controlled. Fuel sources could include free residual liquid in
the tank or an open line containing product.
3.2 Outer tank
The outer tank (interstitial space) will use two, 2 inch openings for ventilation. On one opening, a
small eductor will be installed. The other opening will serve as a source for make-up air.
4.0 TANK AIR MONITORING
4.1 Inner Tank
Air monitoring from outside the underground tank will be conducted by the CIH using a
combination oxygen meter/combustibility meter. The oxygen concentration will first be measured
then the lower explosive limit (LEL) will be measured. The atmosphere inside the tank will be
monitored when first opened each day and periodically and frequently during the day.
Stratified air testing will be measured at the tank entry access opening before ventilation is
initiated. Stratified testing means that the air a different heights will be measured; air will be
sampled in the top third, the middle and near the tank bottom.
After ventilation is started, air monitoring will be conducted at the eductor port, which measures
the turbulent air being exhausted by the tank ventilation. Findings will be recorded on the
Confined Space Entry Permit at least every half-hour while work is being conducted inside the
tank.
After acceptable air monitoring results are measured (>19.5% oxygen and <5% LEL) a properly
equipped worker can enter the tank and will survey the rest of the tank to ensure acceptable
results in areas not accessible from on top at ground level. Results will be recorded. Tank entry
will be allowed if acceptable oxygen and combustibility concentrations are found and maintained.
The on-site air monitoring instrument is calibrated per manufacturer's instructions by an outside
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service.
4.2 Outer Tank
The annular space between the inner and outer tank will be monitored at the outer tank ventilation
eductor port. Of course, no worker entry can be made into the annular space, but monitoring is
important from a fire safety standpoint. Acceptable atmospheric conditions for the annular space
are the same as the tank interior.
5.0 JOB HAZARDS
Hazard
Control
1. Chemical exposure
a.
There may be a small, residual amount of gasoline liquid or vapor
Gasoline Vapors
encountered. This exposure is not anticipated to be significant after
the tank interior is cleaned. Initial tank cleaning requires supplied-air
respirato!y protection.
2. Confined Space Entry
a.
Atmospheric hazards
(entering underground
• Confined space will be monitored for oxygen concentration and
tank)
combustible gasoline vapors
Hazards are to be
* Confined space will be ventilated before and during entry
identified and controlled to
operations
allow for confined space
b.
Supplied-air respirators will be used for initial entry operations
entry. A Confined space
(removal of sediment).
entry permit will be
c.
Electrical hazards (not anticipated — electrical sources will be
completed prior to entering
isolated and locked out/tagged out).
a confined space.
d.
Mechanical hazards (not anticipated)
e.
Inwardly converging walls (not anticipated)
f.
Engulfment not anticipated)
3. Fire
LEL means the least amount of combustible or flammable vapor in air
Note: concentrations of
which could catch fire provided an ignition source is present. The LEL
combustible or flammable
for
gasoline is 0.7%. The LEL for styrene (fiberglass operations) is
vapor greater than 5% of
1.1
%. Acetone has an LEL of 2.6%.
the lower explosive limit
a.
Control ignition sources
(LEL) for gasoline vapor
* No smoking inside confined space fenced area
are not allowed for
e Bond & ground ventilation equipment (prevent static electricity)
Sessions to enter into a
* Use non-sparking tools
tank.
b.
Ventilate fuel tank (reduces combustible/flammable vapors)
c.
Wear flame resistant coveralls
d.
Have fire extinguisher located near confined space entry location.
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5.0 JOB HAZARDS - Continued
4. Heat Stress
a. Workers should be trained on the signs & symptoms of heat-related
illness
b. Maintain adequate hydration
c. Take frequent rest breaks in shaded or air-conditioned locations
d. Recognize factors contributing to heat stress (high air temperature,
humidity, solar radiation, work activities, use of personal protective
equipment) and plan accordingly
5. Noise
a. Use hearing protectors when working around loud machinery for
extended periods
b. Locate compressor away from confined space work area, if possible
6. Ergonomic Hazards
a. Use proper lifting technique at all times (even for lightweight items)
b. Get help when lifting heavy or awkward items.
7. Slip-Trip-Fall
a. Maintain good housekeeping in work areas, especially walkways
(throw away trash, roll up hoses, put away tools)
b. Place cones, barriers or other forms of warning near tank openings or
other hazardous surfaces to warn of fall hazards
6.0 PERSONAL PROTETIVE EQUIPMENT (PPE)
Workers who will enter the tank will be equipped as follows:
• Hearing protective (if noise is excessive for extended periods)
• PVC gloves for fiberglass operations
• Abrasion resistant gloves, as needed
• Work boots
• Flame-retardant outer garment
• Full-face supplied air respirator (supplied from compressor equipped with filtering device)
for tank cleaning operation (on standby)
• Air-purifying respirator equipped with organic vapor cartridges for fiberglass operations
• Full-body harness connected to lifeline and extraction device for permit-required confined
space operations (required when supplied-air respirator is used).
Note: PPE for alternate-procedures confined space entry are different (less protective) than for
permit-required confined space due to the lower hazard and exposure potential. Any
modifications to required PPE will be made based on new conditions and changing of the hazards
presented by the work operations.
It should be noted that use of PPE may increase the risk of heat stress. All workers on-site are
acclimatized to working in hot environments, still, workers should be reminded to keep hydrated
(drink plenty of water) and to take adequate rest breaks, preferably in a cool or at least shaded
location.
11-3-15
All workers on-site will be trained to meet their responsibilities. All workers will be informed or
trained on the hazards and protective measures used to work safely. Workers will be
trained/instructed on the following:
1. Confined space preparation and entry procedures.
2. Confined space job function responsibilities (entrant, attendant, entry Supervisor,
emergency responder).
3. Hazard Communication Requirements (Chemical hazard information, Material safety
data sheets (MSDSs)
4. Tank isolation measures including lockout/tagout.
5. Respiratory protection & other personal protective equipment (PPE).
6. Donning and using body harness and extraction device.
7. Emergency procedures.
8. Fire extinguisher training (any worker who may be called to use fire extinguisher).
9. First aid/cardiopulmonary resuscitation (CPR) training (any worker who may be called to
administer first aid or CPR).
10. Welding and 'Hot-Work" requirements
A brief safety meeting will be conducted at the beginning of each work day. The meeting will
serve as a reminder of safety-related procedures and provide an opportunity for workers to
discuss safety concerns.
8.0 TANK ENTRY & HOT WORK REQUIREMENTS
8.1 Tank Entry
The following describes requirements for allowing workers to enter the confined space:
1. CIH must be on-site.
2. Tank must be actively ventilated.
3. Tank is isolated from potential hazardous energy, e.g., lockout/tagout.
4. Air monitoring is conducted initially and periodically and results are acceptable (oxygen
content > 19.5% and lower explosive limit (LEL) is :5 5%).
5. Entry permit completed.
6. Workers properly equipped (PPE & respiratory protective equipment, as necessary.
Note normal access to the underground tank will be by ladder.
7. Attendant in place at entrance to confined space.
8. All equipment operating and functioning properly.
9. All tools and equipment will be non-sparking. Electrical equipment will be explosion
proof or intrinsically safe. Pneumatic equipment should be bonded & grounding to
control static electricity.
Note that the confined space entry permit may be revoked by the CIH if conditions are judged to
be unsafe. Operations would not be allowed to resume until unsafe conditions have been
corrected and documented.
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8.2 Hot work (welding and cutting)
No hot work is anticipated for this project. For reference, the following summarizes hot work
procedures:
a. Ventilation should be maintained during any hot work on the tank.
b. Initial cutting on the tank would be conducted using a spark resistant pneumatic chisel.
c. Prior to conducting any cutting or welding operations, the "Hot-Work Permit" must be
completed.
d. Flammable vapor monitoring should be conducted continuously at the eductor port or
near the welding location near the tank bottom.
9.0 TANK REPAIR (FIBERGLASS OPERATIONS)
Typically, a hole in the inner tank can be identified visually. If a hole is not identified visually, air
can be directed into the interstitial space (positive pressure) and soap applied at surface locations
inside the tank. Holes will be indicated by production of soap bubbles.
The tank will not be repaired under the following conditions:
1. There are more than five holes;
2. There is a hole larger than 1 Y2 inches; or
3. There is a crack more than three inches long and % wide.
The fiberglass operations consist of the following sequential steps:
1. Final wipe down of "clean" tank interior with rags
2. Cleaning of tank interior using acetone and rags
3. Patching hole(s): Apply with roller, Atprime primer; then apply fiberglass resin with roller;
then with roller apply resin infused, 12 inch by 12 inch fiberglass, 3 layer patch. Bottom
half, seams and ends will be fiberglassed.
10.0 SAFETY-RELATED DOCUMENTATION
The flowing record will be maintained to document the activities for the tank inspection project:
1. Daily safety meeting
2. Confined space entry permit (at least daily).
3. Hot Work Permit
4. Incidents or unusual events will be documented by the CIH in a daily log or
supplemental documents.
11.0 EMERGENCY PLANNING
The following elements and equipment will be available and maintained:
1. 2 portable fire extinguisher 4A:60BC
2. First aid kit
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3. Eyewash
4. Extraction device with harness and lifeline
5. Rescue team available (equipped, ready-to-go responder)
6. Emergency phone numbers (see page 2 of this plan)
7. Hospital information (see page 2 of this plan)
Note there are typically at least three-four workers on-site at all times. For permit-required
confined spaces, the primary retrieval method for a worker inside a tank is using the extraction
device which is attached to the body harness of the entry worker.
Tank entrant must leave tank immediately if directed by attendant or for any other potential
emergency situation. Tank entrant will be alerted to evacuate tank by loud shouting.
Emergency services would be summoned immediately if there was a serious or potentially serious
site condition. Emergency events which threaten human health and safety will be reported to and
investigated by the on-site Supervisor.
12.0 REFERENCES
The following documents were reviewed and are referenced for the preparation of this confined
space safety plan:
1 California Occupational Safety and Health Administration (Cal/OSHA), Title 8, Section
5157, Permit-Required Confined Spaces.
2. API Standard 1631, Interior Lining and Periodic Inspection of Underground Storage
Tanks, 2010.
3. California Code of Regulations, Title 23, Division 3, Chapter 16, Underground Storage
Tank Regulations
4. National Fire Protection Association (NFPA) Standard 326, Standard for the Safeguarding
of Tanks and Containers for Entry, Cleaning, or Repair, 2010.
5. NFPA 77, Recommended Practice on Static Electricity, 2007.
6. California Occupational Safety and Health Administration (Cal/OSHA), Title 8, Section
4848, Fire Prevention and Suppression (For Welding and Cutting Operations).
7. California Occupational Safety and Health Administration (Cal/OSHA), Title 8, Section
5144, Respiratory Protection
8. California Occupational Safety and Health Administration (Cal/OSHA), Title 8, Section
3314, The Control of Hazardous Energy for the Cleaning, Repairing, Servicing, Setting-
Up, and Adjusting Operations of Prime Movers, Machinery and Equipment, Including
Lockout/Tagout.
9. California Occupational Safety and Health Administration (Cal/OSHA), Title 8, Section
2320.4, De-Energized Equipment or Systems
10. California Occupational Safety and Health Administration (Cal/OSHA), Title 8, Section
3395, Heat Illness Prevention
APPENDICES
11-3-15
A.
Site Map
B.
Confined Space Entry Permit
C.
Hot Work Permit
D.
Safety Meeting
E.
Safe
Work Practice Summaries
1.
General Job Hazardous Awareness
2.
Confined Space Operations
3.
Tank Isolation Measures (Lockout/Tagout)
4.
Extraction Device
5.
Electrical Operations & Hazards
6.
Ergonomics, Safe Lifting & Carrying
7.
Noisy Environments
8.
Tools — Hand or Power
9.
Using Personal Protective Equipment
10
Respiratory Protection
11.
Heat Stress
12.
Ladders
13.
Welding Operations
14.
Hazard Communication & Chemical Safety
12 11-3-15
HOT WORK PERMIT
FOR CUTTING AND WELDING
WITH PORTABLE GAS OR ARC EQUIPMENT
Date
Describe
Location
Describe work to
be conducted
Detail Special
Precautions
Is fire watch
circle one
required?
yes no
The location where the welding is to be conducted has been examined, necessary
precautions taken and authorized to be conducted (combustibles are removed or
protected).
Fire extinguishing equipment is immediately available.
Authorized B y (Signature
Permit Ex Tres Time Start Completed
FINAL CHECK -UP
Work area and all adjacent areas to which sparks and heat might have spread
(including floors above and below and on opposite sides of walls) were inspected 30
minutes after the work was completed and were found fire safe.
Supervisor or Fire Watcher Signature:
After welding is completed return this form to Supervisor.
Form is to be retained by issuing organization for at least one year
DEPARTMENT
SUPERVISOR
CONFINED SPACE ENTRY PERMIT
C.S. ID & LOCATION
DATE & TIME PERMIT ISSUED
WORK TO BE PERFORMED TIME PERMIT EXPIRES
CIRCLE ALL THAT APPLY OR WRITE COMMENT
PERMIT REQUIRES SIGNATURE OF SUPERVISOR, ENTRANTS AND ATTENDANTS
1. Space Classification
2.
Configuration
a. Permit-required confined space
a. Top entry
b. Alternate procedures confined space
b. Side entry
c. Non-permit confined space
c. Below ground
d. At ground level
e. Elevated location
3. Hazards Anticipated
4.
Isolation Measures
a. Atmospheric (ox def, flam, toxic)
a. Incoming lines (pipes)
b. Electrical
b. Energy Control (Lockout/Tagout)
c. Mechanical
[electrical, pneumatic, hydraulic etc.]
d. Other energy (hydraulic, steam pneumatic)
e. Engulfment
f. Other
5. Atmospheric Checks (must meet level indicated)
Initial After Vent. Periodic Periodic
a. Tester Name (initials) and time of measurement
b. Oxygen % ( >19.5 %)
c. Flammability % LEL (< 10%)
d. Toxicity (ppm) (see specific PEL)
1.
2.
3.
6. Ventilation - Describe blower (rating and model no.)
7. Equipment
e.
Protective clothing
a. Monitoring Equipment
f.
Non-sparking tools
b. Safety harness/lifelines
g.
Explosion--proof equipment
c. Hoisting equipment
d. SCBAs
RESCUE PROCEDURES/EMERGENCY PLAN
COMMUNICATIONS PROCEDURES
Supervisor's Approval of Entry Permit Attendant's Concurrence
Entrants' Concurrence:
SAFETY MEETING
Job Name Job Address Date
Work Activities
Anticipated Hazards
Physical
Chemical
Protective Measures
Clothing/Equipment,
Procedures
Emergency Procedures
General Emergency Procedures
Hospital Location
Hospital Phone
Emergency Phone Numbers
Other
Name (print)
1.
2.
3.
4.
5.
Conducted by:
Attendees
7.
8.
9.
10.
Name (print)