Confined Space

Chapter 6 Confined Space Chapter Outline 1

Overview

2

1.1

2

Hazards/Impacts

2

Scope

2

3

Standards

3

4

Definitions

3

5

Requirements

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5.1

General 5.1.1 Classification 5.1.2 Permit Requirements 5.1.3 Roles and Responsibilities

7 7 7 8

5.2

Procedures and Specific Requirements 5.2.1 Non-permit-required Confined Space Entry 5.2.2 Permit-required Confined Space Entry Procedure 5.2.3 Permit-required Confined Space Entry under Alternate Procedures 5.2.4 Permit-required Confined Space Entry under Reclassification 5.2.5 Non-entry Rescue – Retrieval Systems 5.2.6 Entry Rescue 5.2.7 Inventory of Confined Spaces 5.2.8 New Permit-required Confined Spaces 5.2.9 Preventing Entry into Permit-required Confined Spaces 5.2.10 Equipment Maintenance 5.2.11 Subcontractor Interaction 5.2.12 Program Review

10 10 12 12 12 13 13 13 13 14 14 14 14

5.3

Training 5.3.1 Authorized Entrants and Attendants 5.3.2 Competent Entry Supervisor

15 15 15

6

Exhibits

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7

References

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Implementation

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Ownership

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Overview This chapter describes requirements for confined spaces, classified as non-permit-required (NPRCS) and permit-required (PRCS). As confined spaces may pose a serious risk to those who enter or work in them, confined-space entry and work are governed by rules to ensure worker safety. This confined space program involves training, documentation, signage, and hazard elimination procedures. Its purpose is to ensure personnel work safely in and around non-permit confined spaces and do not inadvertently enter into a permit-required confined space, or create permit-space conditions as a result of their work. All SLAC personnel who participate or have duties in the confined space program will receive training to ensure that each individual has the understanding and knowledge to perform confined space work and identify hazardous permit space conditions should they arise. Occasionally certain PRCSs may be reclassified to non-permit status through hazard elimination and documentation prior to entry.

1.1 Hazards/Impacts All confined spaces pose a risk of bumps, scrapes, and lacerations. PRCSs, however, have the potential for hazardous atmospheres (such as oxygen deficiency) and additional physical hazards (exposed electrical hazards or moving parts). Some PRCSs may contain the potential for more than one hazard. For instance, gasoline vapor is both flammable and toxic. Although the potential for falls and subsequent injury exists during some confined space work, a fall hazard alone does not create a PRCS. Fall protection is addressed in Chapter 45, “Fall Protection”. 1

2

Scope The confined space program and its requirements apply to all personnel who enter or supervise operations within confined spaces at SLAC. If permit-required confined space entry is required by subcontractors, their work is governed by their companies’ federal Occupational Safety and Health Administration (OSHA) or Cal/OSHA compliant written confined space programs. Subcontractors will provide proof of adequate confined space entry operations training and rescue provisions prior to working in permit-required spaces.

1

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SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 45, “Fall Protection”, http://www-group.slac.stanford.edu/esh/hazardous_activities/fall_protection/policies.htm

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Not all enclosed spaces are confined spaces. The following are examples of enclosed locations at SLAC that are not confined spaces because they are designed and equipped for continuous human occupancy: 

Collider Injector Development (CID)



Damping Ring Vaults



Linac



Positron Vault



Beam Switchyard (BSY)



SLAC Linear Collider (SLC) Arcs



Collider Experiment Hall (CEH) Pit



Positron-Electron Project (PEP-II) Ring



End Station A (ESA)



Final Focus Test Beam (FFTB)



Stanford Positron-Electron Asymmetric Ring (SPEAR) Ring and Injector/ Booster

Note

3

Though not confined spaces themselves, these may contain confined spaces.

Standards SLAC adheres to the following work smart standard for confined spaces: 

4

Title 29, Code of Federal Regulations, Part 1910.146, “Permit-Required Confined Spaces” (29 CFR 1910.146) 2

Definitions Acceptable entry condition. Condition that must exist in a permit space to allow entry and to ensure that employees involved with a permit-required confined space entry can safely enter into and work within the space Attendant. A person designated to remain outside the confined space and monitor conditions for any health or safety impacts and perform the attendant’s duties as described on the entry permit (see Section 5.3, “Training”) Authorized entrant. A person who has been determined to be medically and physically capable to perform work in a confined space and has the appropriate training for that entry (see Section 5.3, “Training”)

2

http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9797

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Blanking, blinding, line blank. The absolute closure of a gas or liquid filled line, pipe, or duct by the fastening of a solid plate that completely seals the bore and is capable of withstanding the maximum pressure of the line, pipe, or duct without leaking Competent entry supervisor. The person who is responsible for determining if acceptable entry conditions are present for entry, for authorizing entry, overseeing entry operations, and terminating any permitrequired confined space operations (see Section 5.3, “Training”) Confined space. A space that has all of the following three characteristics: 1.

It is large enough and so configured that a person can bodily enter and perform assigned work

2.

It has limited or restricted means for entry or exit

3.

It is not designed for continuous human occupancy

Confined spaces are divided into two categories based on their inherent hazard potential: 1.

Permit-required confined space

2.

Non-permit-required confined space

Confined space owner. A person at SLAC, either a building, facility, or area manager or a person designated by such, responsible for monitoring the condition of confined spaces in their areas Confined space profile. A document that summarizes the facts about a confined space that may have bearing on safe entry, work and egress from that space. The profile will also document any necessary emergency response actions or phone numbers unique to the space. Double block and bleed. System for isolating a space by closing two valves on a line leading to a space, and bleeding the line between the valves to create a buffer zone Emergency. Any occurrence or event internal or external to the confined space that could endanger the entrants, or any condition not permitted on the entry permit. This includes any failure of hazard control, monitoring, communication, or lighting equipment. Emergency rescue. The procedures by which persons incapable of self-rescue are removed from a confined space Emergency services. Local fire, police, and ambulance departments who are responsible for emergency response and emergency rescue efforts Emergency condition. Any confined space situation where any airborne material encountered that is measured or estimated to be at its immediately dangerous to life and health (IDLH) or 10 percent lower flammable limit (LFL) value is considered an emergency condition. No entry will be made and the situation must be mitigated by trained emergency response personnel. Engulfment. The surrounding and effective capture of a person by a liquid or finely divided (flowable) solid substance that can be inhaled to cause death by filling or plugging of the respiratory system or than can exert enough force on the body to cause death by strangulation, constriction, or crushing Entry (into a confined space). When any part of a person’s body passes through the plane of the opening of the space

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Entry permit. The written or printed document that is used to allow and control entry into a permit-required confined space Hazardous atmosphere, potentially hazardous atmosphere. An atmosphere that has the potential to cause death, incapacitation, impairment of ability for self-rescue, acute illness, delayed illness, or effects that can result in injury. Hot work. Any work that involves burning, welding, riveting, or similar fire-producing operations, as well as work that produces a source of ignition, such as drilling, abrasive blasting, and space heating Hot work permit. The written authorization to perform hot work operations Immediately dangerous to life and health (IDLH). Any condition that poses an immediate or delayed threat to life or that would cause irreversible adverse health effects or interfere with an individual’s ability to escape unaided from a space. The IDLH also represents a maximum concentration from which, in the event of respirator failure, a person could escape within 30 minutes without experiencing any irreversible health effects. Inerting. The process of filling a space with an inert non-flammable material for the purpose of displacing or diluting oxygen to remove the flammable potential of the confined space atmosphere Isolation, isolating. The process by which a confined space is removed from service and completely protected against releasing material into the space. This process includes such means as blanking, double block and bleed, or misalignment of lines, lockout of all energy sources, blocking of energy sources, or removing mechanical linkages. Line breaking. The process of physically opening a line that contains or previously contained a hazardous material or hazardous pressure. A double-block and bleed is required between the source of hazardous energy and the point where the line is broken. Non-permit-required confined space (NPRCS). A confined space that does not contain or have the potential to contain any atmospheric or other hazard capable of causing death or physical harm (see permit-required confined space). A non-permit-required confined space may become a permit-required confined space if there are hazardous materials brought into the space or if hazardous activities are conducted in the space. Oxygen concentration of ambient air. Normal ambient air contains 20.9 percent oxygen by volume Oxygen deficiency. Any measured oxygen concentration that is less than normal ambient air. For confined space entry purposes, any measured oxygen concentration that is less than 19.5 percent indicates an oxygen deficiency. The cause of this oxygen deficiency must be determined before entry will be allowed and controls on this potential hazard will be put in place before entry is allowed. The oxygen deficiency can be caused by 

An intrusion of an unknown material into the space that has diluted or displaced the available oxygen or



The presence of something that has consumed the oxygen such as oxidation (rust), chemical reactions (including combustion), absorption (on wet activated carbon), or biological action

Oxygen-deficient atmosphere. An atmosphere that has less than 19.5 percent oxygen by volume. When the oxygen content is below 19.5 percent an air-purifying respirator cannot be worn and a supplied air respirator must be used for entry.

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Oxygen enrichment. Any measured oxygen concentration that is greater than normal ambient air (20.9 percent). Any measured concentrations measured greater than 20.9 percent is indicative that there is an oxygen source inside the confined space (leaking welding hose, chemical reaction). Special precautions must be taken to understand and control this hazard potential before space entry is allowed. Oxygen-rich atmosphere. An oxygen concentration in the space of greater than 23.5 percent oxygen by volume Permit-required confined space (PRCS). A confined space that has one or more of the following characteristics: 

Contains or has a potential to contain a hazardous atmosphere



Contains a material that has the potential for engulfing an entrant



Has an internal configuration such that an entrant could be trapped or asphyxiated by inwardly converging walls or by a floor which slopes downward and tapers to a smaller cross-section



Contains any other recognized serious safety or health hazard

Permit system. The written procedure for obtaining, preparing, issuing and retrieving entry permits for entry into confined spaces and returning the space to service following termination of entry. Prohibited condition. Any condition in permit-required confined space that is not allowed by the permit during the period when the entry is authorized. Purging. The method by which gases, vapors, or other airborne hazards are initially displaced, diluted, or removed from a confined space. Purging is the initial step in controlling atmospheric hazards before entry into the confined space. See ventilating. Rescue service. See emergency services Retrieval system. System for conducting non-entry rescue of persons from confined spaces. This system includes mechanical retrieval or extraction devices (a rated tripod, davit, or other anchorage plus winch) and full body harness. Wristlets may be used to aid in a difficult extraction; however, wristlets should not be used to support a person’s weight. Testing. The process by which the hazards that may confront entrants of a permit space are identified and evaluated Two-person rule. Rule that people must work in teams of two in defined situations Ventilating. The process where clean fresh air is blown into the confined space while persons are in the space (See purging). In some cases, local exhaust ventilation may be required to remove contaminants from the space generated at a point source. An example of this would be the use of local exhaust ventilation to remove fumes and noxious gases if welding were taking place in the confined space.

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Requirements

5.1 General Entry into a confined space where all hazards have not been eliminated through isolation (completely protected against the release of energy or material into the space) must be performed under a permit. The permit must specify the specific means by which the identified hazards are to be controlled. No routine entry will be permitted into confined spaces that have been found to contain atmospheres that are immediately dangerous to life and health (IDLH).

5.1.1

Classification

Confined spaces will be classified as permit-required or non-permit required by the confined space program manager or competent entry supervisor. The program manager will maintain an inventory of all confined spaces. Each confined space will have a designated owner. In addition, permit-required confined spaces will be evaluated, profiled, and labeled by the program manager or a competent entry supervisor. (See Confined Space Profile Form 3 and SLAC Permit Required Confined Space Inventory 4 .)

5.1.2

Permit Requirements

If a permit is required, it must outline the conditions under which a PRCS can be entered and must be administered by a competent entry supervisor. (See SLAC Confined Space Entry Permit. 5 ) A PRCS will only be entered if the entry conditions meet with the requirements of the permit; any change in condition of the space or scope of work before or during entry will terminate the permit and require a new permit. For any PRCS entry there will be a competent entry supervisor to administer the permit, an attendant to monitor the space and the personnel within, and all entrants will be authorized. Atmospheric testing is required for all PRCS entries. Competent entry supervisors of PRCS work must test the atmosphere for oxygen deficiency, flammability, hydrogen sulfide, carbon monoxide, and any other suspected or known atmospheric hazard, before personnel enter the space. Owners of test equipment will ensure that it is adequate for the anticipated hazards and has been properly calibrated. A rescue plan is required for all PRCS entries.

3

Confined Space Profile Form (SLAC-I-730-0A21J-008), http://wwwgroup.slac.stanford.edu/esh/eshmanual/references/confinedProfileForm.pdf

4

SLAC Permit Required Confined Space Inventory, https://wwwinternal.slac.stanford.edu/esh/hazardous_activities/confinedspace/internal/prcsi/prcsi081104.pdf

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SLAC Confined Space Entry Permit (SLAC-I-730-0A21J-002), http://wwwgroup.slac.stanford.edu/esh/eshmanual/references/confinedPermit.pdf

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5.1.3

Chapter 6: Confined Space

Roles and Responsibilities

5.1.3.1 Confined Space Program Manager Besides developing requirements and training, the confined space program manager will 

Along with competent entry supervisors, survey and profile confined spaces and determine which are permit required



Maintain the Confined Space Inventory



Collect and retain cancelled permits for one year



Advise competent entry supervisors



Ensure that subcontractors have an OSHA or Cal/OSHA compliant program

5.1.3.2 Managers and Supervisors Line management is responsible for confined space entries and for designating competent entry supervisors. 5.1.3.3 Confined Space Owners Confined space owners must ensure confined spaces are properly signed and any obvious change in condition to the space is reported to the confined space program manager. 5.1.3.4 Competent Entry Supervisors Competent entry supervisors will

6-8



Be properly trained (see Section 5.3, “Training”)



Know the hazards that may be faced during entry, including information on the mode, signs, or symptoms, and consequences of the exposure



Verify, by checking that the appropriate entries have been made on the permit, that all tests specified by the permit have been conducted and that all procedures and equipment specified by the permit are in place before endorsing the permit and allowing entry to begin



Terminate the entry and cancel the permit when the entry operations covered by the entry permit have been completed or a condition that is not allowed under the entry permit arises in or near the permit space



Verify that rescue services are available and that the means for summoning them are operable



Remove unauthorized individuals who enter or who attempt to enter the permit space during entry operations



Determine, whenever responsibility for a permit space entry operation is transferred and at intervals dictated by the hazards and operations performed within the space, that entry operations remain consistent with terms of the entry permit and that acceptable entry conditions are maintained



Approve alternate entries into PRCSs and reclassifications of them

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

Profile newly discovered or created confined spaces and notify the program manager. The competent supervisor will provide the program manager with photographs and specific information about the space for inclusion in the confined space inventory.



Forward all cancelled permits to the program manager

5.1.3.5 Attendants Attendants will 

Be properly trained (see Section 5.3, “Training”)



Know the hazards that may be encountered during the entry, as well as behavioral/physiological symptoms and health effects if overexposure occurs



Monitor activities inside and outside the space to determine if it is safe for entrants to remain



Maintain an accurate account of authorized entrants in the permit-required space.



Maintain communication with the authorized entrants to monitor their work activities and to alert them if evacuation is necessary.



Remain outside the space during entry operation until relieved by another authorized attendant.



Perform no other activities which may interfere with the primary job of monitoring safety and condition of authorized entrants inside the space.



Summon rescue and other emergency services to facilitate escape from the permit-required space.



Performs non-entry rescues

5.1.3.6 Authorized Entrants Authorized entrants will 

Be properly trained (see Section 5.3, “Training”)



Know the hazards that may be encountered during the entry, as well as mode, symptoms and health effects if overexposure occurs



Operate any equipment required for the safety of the entry operation



Maintain communication with the authorized attendant



Notify the attendant of any indication of a dangerous situation or prohibited condition and exits immediately



Exit the permit space as quickly as possible whenever instructed by the attendant or the competent entry supervisor for any reason

5.1.3.7 Emergency Services Personnel Emergency services must provide a rescue team that meets all training and equipment requirements. Rescue procedures must be space-specific. Individuals responsible for making entry rescues must 

Have made practice rescues using people or manikins from representative spaces within the previous 12 months

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

Be trained to perform assigned duties plus the duties of the authorized entrant



Be trained in first aid and CPR

5.1.3.8 University Technical Representatives University technical representatives (UTRs) overseeing work that will require subcontractors to enter permit-required confined spaces will 

Ensure contractors have adequate PRCS training and a compliant written confined space entry program prior to entering permit-required confined spaces



Inform subcontractors of the potential hazards posed by the confined spaces involved



Debrief subcontractors after confined space entry work to review and resolve any issues that may have arisen during work

5.1.3.9 Subcontractors Subcontractors must have an OSHA or Cal/OSHA compliant program before being allowed to do confined space work. This review will be done as part of the pre-work hazard analysis. Subcontractors will 

Observe all posted labels and signs identifying and restricting entry into permit-required confined spaces, and obtain information on hazards and procedures specific to PRCSs involved in their work



Inform their SLAC customer prior to making an entry into a permit-required confined space. This must occur at least three working days prior to entry, unless requested by the SLAC customer and approved by the confined program manager



Immediately notify their SLAC contact if previously unidentified hazards are discovered in a confined space, or if a permit-required confined space is not identified or secured as required



Maintain and make available the material safety data sheets (MSDSs) of any hazardous materials they will be using in the confined space



Meet the requirements of this program and applicable regulations in accordance with their company’s confined space program



Participate in debriefing sessions following confined space entries

5.2 Procedures and Specific Requirements 5.2.1

Non-permit-required Confined Space Entry

SLAC employees and subcontractors may enter a non-permit-required confined space (NPRCS) if all of the following conditions are met:

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1.

A NPRCS pre-entry checklist is completed and signed (see Confined Space Pre-entry Checklist for Non-permit Required Spaces 6 ).

2.

The work to be performed in the confined space will not produce any of the hazards that would create a PRCS.

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Confined Space Pre-entry Checklist for Non-permit Required Spaces (SLAC-I-730-0A21J-006), http://www-group.slac.stanford.edu/esh/eshmanual/references/confinedNPRCSChecklist.pdf

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3.

Proper personal protective equipment is used.

4.

The two-person rule is used.

5.

Measures are taken to control any hazards outside the space, such as vehicular traffic.

6.

The opening of the confined space is guarded by railing, temporary covers, or other barriers to prevent an accidental fall, and to protect workers in the space as well as passersby. This requirement will not apply when the confined space is in a remote area which is not subject to pedestrian traffic.

7.

Space is evacuated upon any indication of an abnormal or unexpected condition inside the space.

5.2.1.1 Hazardous Work in Non-permit-required Confined Spaces Hazardous work in a NPRCS may generate one or more of the hazards listed in Section 1.1, “Hazards/Impacts”. Supervisors of hazardous work in a confined space may contact the confined space program manager to request a review. This request should be made at least two days before scheduled work. If the confined space program manager or a competent entry supervisor determines that the hazardous work to be performed in the NPRCS will generate one or more of the hazards listed in Section 1.1, the confined space will be classified as a PRCS for the duration of the hazardous work and a permit will be required. Only subcontractors and authorized SLAC personnel will be allowed to perform the hazardous work. Examples of hazardous work in a confined space include the following: 

Painting



Cleaning with acids or solvents



Welding



Brazing



Torch cutting



Sanding with power tools



Sandblasting



Utility-line breaking



Using cryogenic gases



Operating valves capable of releasing material, such as water or gas, in a quantity sufficient to engulf a person or cause a hazardous atmosphere



Work that involves reduction-oxidation reactions

Note

A signed and approved hot work permit is required for any spark or flame-producing activities to be done in the space. 7 Proper lock out/tag out procedures must be in place where applicable, and must be performed by authorized persons properly trained in the control of hazardous energies. 8

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“Hot Work Permit-Fire System”, https://www-internal.slac.stanford.edu/esh-db/HotworkPermitFire/HotWork/Default.aspx

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SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 51, “Control of Hazardous Energy”, http://www-group.slac.stanford.edu/esh/hazardous_activities/lockout_tagout/

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5.2.2

Chapter 6: Confined Space

Permit-required Confined Space Entry Procedure

Entry into a PRCS will follow an established procedure and be controlled by an entry permit. (See Confined Space Permit-required Entry Procedure, 9 Confined Space Entry Supervisor Pre-entry Checklist, 10 and SLAC Confined Space Entry Permit. 11 )

5.2.3

Permit-required Confined Space Entry under Alternate Procedures

If the space is classified as a PRCS and the only hazard posed is an actual or potential hazardous atmosphere (as documented in the profile for that space), steps can be taken to enter the space under alternate entry procedures. This involves demonstrating that continuous forced air ventilation alone is sufficient to inert the hazardous atmosphere and maintain the space for safe entry. Successful entry under alternate entry procedures is accomplished by obtaining monitoring and inspection data and making the certification and supporting documentation available to entrants. (See Confined Space Alternate Entry Permit. 12 ) An approved alternate entry procedure precludes many of the requirements of a permit entry. If there are other hazards present other than atmospheric, alternate entry procedures may not be used. However, reclassification of the space to non-permit may be possible (see Section 5.2.4, “Permit-required Confined Space Entry under Reclassification”).

5.2.4

Permit-required Confined Space Entry under Reclassification

A PRCS may be temporarily reclassified as a non-permit space if it poses no actual or potential atmospheric hazards and if all hazards within the space are eliminated without entry into it. Hazard elimination consists of flushing all chemicals, verifying a safe pH in the space, isolating incoming fluid or gas lines via blanking/blinding or a double block and bleed system, removing or locking out any exposed mechanical and electrical energies, and so on. A space may be reclassified by the confined space program manager or any competent entry supervisor by filling out, signing, and keeping on file a reclassification form. (See Confined Space Reclassification Form. 13 ) If all hazards are completely eliminated (that is, no remaining potential), the space may be considered nonpermit required for the duration of the entry, as long as the hazards remain eliminated. Any change in the

9

Confined Space Permit-required Entry Procedure (SLAC-I-730-0A21C-007), http://wwwgroup.slac.stanford.edu/esh/eshmanual/references/confinedEntryProcedure.pdf

10 Confined Space Entry Supervisor Pre-entry Checklist (SLAC-I-730-0A21J-005), http://wwwgroup.slac.stanford.edu/esh/eshmanual/references/confinedPRCSChecklist.pdf 11 SLAC Confined Space Entry Permit (SLAC-I-730-0A21J-002), http://wwwgroup.slac.stanford.edu/esh/eshmanual/references/confinedPermit.pdf 12 Confined Space Alternate Entry Permit (SLAC-I-730-0A21J-010), http://wwwgroup.slac.stanford.edu/esh/eshmanual/references/confinedAltEntryPermit.pdf 13 Confined Space Reclassification Form (SLAC-I-730-0A21J-009), http://wwwgroup.slac.stanford.edu/esh/eshmanual/references/confinedReclassForm.pdf

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space resulting in re-introduction of hazards will require the space to be vacated and re-assessed. Entry will not be allowed until all hazards are eliminated.

5.2.5

Non-entry Rescue – Retrieval Systems

If feasible whenever an authorized entrant enters a permit space, retrieval systems will be used to facilitate non-entry rescue. Each entrant will use a full-body harness with a retrieval line attached. The other end of the line will be attached to a mechanical device or fixed point. Wristlets may be used to aid in a difficult extraction; however, wristlets should not be used to support a person’s weight.

5.2.6

Entry Rescue

When non-entry rescue is not feasible, emergency services must be able to provide entry rescue in timely manner considering the nature of hazards present in the space. For atmospheric or other life-threatening hazards, emergency services must be immediately available at the confined space during entry and prepared for entry rescue (rescue equipment and personal protective equipment staged for immediate response). All entry rescues will be performed by authorized emergency services stationed on site at SLAC (either SLAC or subcontractor). Emergency services must provide a rescue team that meets all training and equipment requirements. Rescue procedures must be space-specific. Individuals responsible for making entry rescues must 

Have made practice rescues using people or manikins from representative spaces within the previous 12 months



Be trained to perform assigned duties plus the duties of the authorized entrant



Be trained in first aid and CPR

5.2.7

Inventory of Confined Spaces

The confined space program manager will maintain an inventory of confined spaces, including a profile of the hazards, conditions, and mitigations for specific PRCSs. (See Confined Space Profile Form. 14 ) The program manager will continually track changes in the inventory and annually solicit modifications to the inventory from confined space owners, who must ensure the accuracy of the inventory as it applies to their confined spaces.

5.2.8

New Permit-required Confined Spaces

Upon creation or discovery of a new or suspected PRCS, the building/area/facility manager must notify the program manager. The program manager will then evaluate the PRCS and distribute a written statement to all building/area/facility managers to apprise them of the new PRCS. Building/area/facility managers must ensure that employees are aware of the location and hazards of the new PRCS and designate an owner for the space. Information on new PRCSs will be included in subsequent distributions of the Confined Space Inventory.

14 Confined Space Profile Form (SLAC-I-730-0A21J-008), http://wwwgroup.slac.stanford.edu/esh/eshmanual/references/confinedProfileForm.pdf

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5.2.9

Chapter 6: Confined Space

Preventing Entry into Permit-required Confined Spaces

Confined space owners must prevent unauthorized persons from entering PRCSs by one or more of the following: 

Placing a prohibitive warning sign at the entrance



Placing the entrance in a location that is difficult to reach without the use of a ladder, scissor lift, hoist, or other inconvenient means



Locking or bolting the entrance



Welding the entrance shut



Making access to the entrance difficult without the use of tools, heavy equipment, or multiple employees

5.2.10 Equipment Maintenance All confined space entry equipment will be properly maintained and calibrated. In accordance with the manufacturer’s recommendations, equipment owners will develop and follow a maintenance schedule, and the equipment will carry inspection and calibration information when appropriate.

5.2.11 Subcontractor Interaction If permit-required confined space entry is required by subcontractors, their work will be governed by their companies’ OSHA or Cal/OSHA compliant written confined space programs. Subcontractors will provide proof of adequate confined space entry operations training and rescue provisions prior to working in permit-required spaces.

5.2.12 Program Review The confined space program manager will assess the program and cancelled permits from PRCS entries at least annually or more frequently when informed of circumstances where control measures taken may not protect employees. Circumstances requiring such a review include 

Unauthorized entry



Detection of hazards not covered



Detection of prohibited conditions



Injury or near-miss



Change in space use or configuration



Employee complaints about program effectiveness

Note

6-14

When confined space program reviews are initiated due to the above circumstances, deficiencies will be corrected prior to subsequent entry.

SLAC-I-720-0A29Z-001-R023.2

22 Dec 2005 (updated 10 Sep 2008)

Chapter 6: Confined Space

SLAC Environment, Safety, and Health Manual

5.3 Training 5.3.1

Authorized Entrants and Attendants

General confined space entry and hazard awareness training will establish proficiency for authorized entrants and attendants. The following SLAC training course meets these requirements: 

ES&H Course 144, Permit Required Confined Space 15

This course must be completed before entering a permit-required confined space.

5.3.2 

Competent Entry Supervisor

OSHA Course Number 2260, Permit-required Confined Space Entry Operations Training

This is a three-day course provided by a qualified third party. Only persons who have successfully completed this course and who are designated in writing (see Confined Space PRCS Competent Entry Supervisor Designation Form 16 ) may act in this capacity before and during PRCS entries. An equivalent course offered by a qualified third party may be substituted.

6

Exhibits 

Confined Space Permit-required Entry Procedure (SLAC-I-730-0A21C-007) 17



Confined Space Entry Supervisor Pre-entry Checklist (SLAC-I-730-0A21J-005) 18



SLAC Confined Space Entry Permit (SLAC-I-730-0A21J-002) 19



Confined Space Alternate Entry Permit (SLAC-I-730-0A21J-010) 20



Confined Space Pre-entry Checklist for Non-permit Required Spaces (SLAC-I-730-0A21J-006) 21



Confined Space PRCS Competent Entry Supervisor Designation Form (SLAC-I-730-0A21J-007) 22



Confined Space Profile Form (SLAC-I-730-0A21J-008) 23



Confined Space Reclassification Form (SLAC-I-730-0A21J-009) 24

15 https://www-internal.slac.stanford.edu/esh-db/training/slaconly/bin/catalog_item.asp?course=144 16 Confined Space PRCS Competent Entry Supervisor Designation Form (SLAC-I-730-0A21J-007), http://www-group.slac.stanford.edu/esh/eshmanual/references/confinedDesignationForm.pdf 17 http://www-group.slac.stanford.edu/esh/eshmanual/references/confinedEntryProcedure.pdf 18 http://www-group.slac.stanford.edu/esh/eshmanual/references/confinedPRCSChecklist.pdf 19 http://www-group.slac.stanford.edu/esh/eshmanual/references/confinedPermit.pdf 20 http://www-group.slac.stanford.edu/esh/eshmanual/references/confinedAltEntryPermit.pdf 21 http://www-group.slac.stanford.edu/esh/eshmanual/references/confinedNPRCSChecklist.pdf 22 http://www-group.slac.stanford.edu/esh/eshmanual/references/confinedDesignationForm.pdf 23 http://www-group.slac.stanford.edu/esh/eshmanual/references/confinedProfileForm.pdf

22 Dec 2005 (updated 10 Sep 2008)

SLAC-I-720-0A29Z-001-R023.2

6-15

SLAC Environment, Safety, and Health Manual



7

Chapter 6: Confined Space

SLAC Permit Required Confined Space Inventory 25

References SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001) 26 

Chapter 19, “Personal Protective Equipment” 27



Chapter 37, “Emergency Management” 28



Chapter 45, “Fall Protection” 29



Chapter 51, “Control of Hazardous Energy” 30

Other SLAC Documents 

8

“Hot Work Permit-Fire System” 31

Implementation The requirements of this chapter are effective upon publication unless otherwise noted here.

9

Ownership Department: Chemical and General Safety Program: Confined Space Owner: Program Manager

24 http://www-group.slac.stanford.edu/esh/eshmanual/references/confinedReclassForm.pdf 25 https://wwwinternal.slac.stanford.edu/esh/hazardous_activities/confinedspace/internal/prcsi/prcsi081104.pdf 26 http://www-group.slac.stanford.edu/esh/eshmanual/ 27 http://www-group.slac.stanford.edu/esh/general/ppe/policies.htm 28 http://www-group.slac.stanford.edu/esh/emergency/chapter/policies.htm 29 http://www-group.slac.stanford.edu/esh/hazardous_activities/fall_protection/policies.htm 30 http://www-group.slac.stanford.edu/esh/hazardous_activities/lockout_tagout/ 31 https://www-internal.slac.stanford.edu/esh-db/HotworkPermit-Fire/HotWork/Default.aspx

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SLAC-I-720-0A29Z-001-R023.2

22 Dec 2005 (updated 10 Sep 2008)

Confined Space Permit-required Entry Procedure Department: Chemical and General Safety Program: Confined Space Owner: Program Manager Authority: ES&H Manual, Chapter 6, Confined Space 1

Step

Person

Action

1.

Competent entry supervisor Attendants Entrants Emergency services personnel Employees involved in confined space entry

Completes confined space entry training Note: if the competent entry supervisor has reason to believe an entrant/attendant has an inadequate understanding of the requirements, his or her participation in the confined space entry will not be permitted.

2.

Competent entry supervisor

Evaluates the confined space to assess potential hazards and determines the necessary control measures Determines if non-entry rescue can be performed; if not, coordinates rescue Note: the Confined Space Database will be used to document the evaluation of potential hazards of the space and associated controls.

3.

Competent entry supervisor

Ensures that the space’s atmosphere is tested prior to entry, using properly calibrated monitoring equipment, and defines any required monitoring in the permit Note: contact the confined space program manager for assistance.

4.

Competent entry supervisor

Completes the confined space entry permit Ensures that potential hazards are identified and associated control measures are implemented Verifies that all required equipment and personnel (attendants, entrants, emergency services) are available for the confined space entry

5.

Competent entry supervisor

Verifies that  All appropriate information has been completed on the permit  All tests specified by the permit have been conducted  All personnel are trained, entry conditions are acceptable  All procedures and equipment specified by the permit are in place before signing the permit or authorizing entry Note: if desired, competent entry supervisors may refer to

1

SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 6, “Confined Space”, http://www-group.slac.stanford.edu/esh/hazardous_activities/confinedspace/policies.htm

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Confined Space Permit-required Entry Procedure

Step

Person

Action the entry supervisor pre-entry checklist to assist in verifying and documenting pre-entry conditions.

6.

Competent entry supervisor

Conducts a pre-entry briefing for all personnel involved in the entry operation. At a minimum, topics include  The work to be performed  The anticipated hazards, including signs, symptoms and consequences of exposure to the hazards  Hazard control measures  Emergency rescue procedures  Prohibited work activities Note: notification of the confined space program manager is required prior to entering a permit-required confined space with a known atmospheric hazard(s).

7.

Authorized entrants (listed on the permit)

Enter the permit-required confined space only if  Entry conditions are acceptable and all of the control measures specified on the permit are implemented  Entry is only made during the time specified on the permit  All members of the confined space entry team have received proper confined space entry training  Adequate rescue provisions have been made

8.

Attendant

Controls entry into the PRCS by remaining at the work site and keeping an accurate accounting of entrants in the PRCS on the permit. The attendant maintains communication with the entrant(s) and performs no other duties that might interfere with his or her ability to observe and protect the entrant(s). Note: the attendant never enters the confined space unless fully trained as an entrant, has been replaced by another qualified attendant, and the entry is noted on the permit.

9.

Competent entry supervisor

Periodically verifies that entry operations remain consistent with terms of the permit and that acceptable entry conditions are maintained:  During the entry at intervals dictated by the hazards and operations performed within the space  Whenever responsibility for a permit space entry is transferred to another entry supervisor.

10.

Attendant

Orders the entrant(s) to evacuate the space if the attendant  Detects a prohibited condition or  Detects the behavioral effects of hazardous exposure (to an chemical, biological or physical stressor) in an authorized entrant or  Detects a situation outside the space that could endanger the authorized entrant(s) or

22 Dec 2005 (updated 10 Sep 2008) SLAC-I-730-0A21C-007-R001

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Confined Space Permit-required Entry Procedure

Step

Person

Action  Cannot effectively and safely perform all the required duties Note: anyone, including an entrant, may terminate the entry and initiate a new evaluation for potential hazards if work operations or conditions in the space change so that the magnitude of identified hazards increase or new hazards are identified or introduced into the space.

11.

Competent entry supervisor

Cancels the permit at the completion of the job, the end of the work shift, or when a change in the work conditions or methods or acceptable entry conditions occurs

12.

Competent entry supervisor

Performs a review of the cancelled permit and conducts and documents a post-entry debriefing with entrants and attendants

13.

Competent entry supervisor

Upon completion of review of the permit, forwards a copy of the terminated permit to the confined space program manager

14.

Confined space program manager

Maintains the canceled confined space entry permits for at least one year

22 Dec 2005 (updated 10 Sep 2008) SLAC-I-730-0A21C-007-R001

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Confined Space Entry Supervisor Pre-entry Checklist Department: Chemical and General Safety Program: Confined Space Owner: Program Manager Authority: ES&H Manual, Chapter 6, Confined Space 1 Identification Division/Department: Entry Purpose:

SECTION 1

Space/Location: Date:

Hazard Evaluation and Controls Check Yes No

Type

Control Measures (describe If “yes” is checked)

Does the space contain or potentially contain a hazardous atmosphere? Does the space contain any chemicals or chemical residue? Does the space contain any flammable/combustible substances? Does the space contain or potentially contain significant amount of decomposing organic matter? Does the space have any pipes which bring chemicals into it? Does the space have any materials that can trap or potentially trap, engulf, or drown an entrant? Is vision obscured by dust at 5 feet or less? Does the space contain any rotating mechanical equipment? Does the space have converging walls, sloped or tapered floors to smaller cross-sections which could trap or asphyxiate an entrant (Entrapment Hazard)? Does the tank, vessel or equipment in the space contain rusted interior surfaces? (Potential for O2 deficient atmosphere) Does the space contain thermal hazards (e.g., extremely hot or cold)?

Does the space have poor illumination levels? Does the space contain excessive noise levels which could interfere with communication with an attendant? Does the space present any slip, trip, or fall hazards? Are there any operations conducted or equipment adjacent to the space opening which could present a hazard to entrants? Are there any hazards from failing objects into the confined space that would necessitate use of barriers. Are there lines under pressure (compressed air or steam) servicing the space? Are cleaning solvents or paints going to be used in the space? Is welding, cutting, brazing, riveting, scraping, or sanding going to be performed in the space? Does the space have energized electrical cables/ equipment or other type of hazardous energy (e.g. steam, compressed gas, rotating mechanical equipment, etc.) that cannot be locked or tagged out?

1

SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 6, “Confined Space”, http://wwwgroup.slac.stanford.edu/esh/hazardous_activities/confinedspace/policies.htm

22 Dec 2005 (updated 10 Sep 2008)

SLAC-I-730-0A21J-005-R001

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Confined Space Entry Supervisor Pre-entry Checklist

SECTION 1

Hazard Evaluation and Controls

Does the space have poor natural ventilation which would allow an atmospheric hazard to develop? Is the entry into a vertical space > 5 feet deep?

A mechanical device shall be available to retrieve personnel from vertical type permit spaces more than 5 feet deep

Are there any conditions which could prevent any entrants' selfrescue from the space? Are there any substances used in the space which have acute hazards? Is mechanical ventilation needed to maintain a safe environment? If yes, is it adequate for the volume of the space? Is air monitoring necessary to ensure the space is safe for entry due to potential hazardous atmosphere? Are residues going to be scraped off the interior surfaces of the vessel? Are non-sparking tools required to remove residues? Is respiratory protection required because of a hazardous atmosphere?) Does the space present a serious S&H hazard other than those noted above which would make it a permit space?

SECTION 2

Hazard Evaluation and Controls

Preparation Yes

N/A

Yes

N/A

Has the confined space been evaluated

Electrical equipment is grounded

Entry area free of debris and objects

No compressed cylinders in space

Atmospheric monitoring conducted Constant monitoring required Periodic; Specify frequency______________ Barriers erected around CS opening where personnel could fall into, or drop objects onto entrants through, a confined space opening

Host employer and/ or contractor notified Pre-job briefing conducted covering as a minimum: 1) Task to be performed and work methods; 2) Entry and emergency procedures 3) Potential hazards and controls; 4) Atmosp. test results 5) Prohibited work activities Confined space drained and flushed

All hazards identified and isolated Hot work permit required Energy sources isolated/locked out

Personnel have been trained Adequate number of Attendant(s) to provide continuous coverage Adequate number of entrants to perform task

Notify SLAC Fire Protection for entries into PRCS with known hazardous atmosphere Other; Specify_________________________

Technical support to performing atmospheric testing available

Equipment Required Yes

N/A

Yes

N/A

Forced air or exhaust ventilation equipment

Non-sparking tools used

Ground fault interrupters (GFCI) Low voltage lighting used Retrieval Equipment (Not required for

22 Dec 2005 (updated 10 Sep 2008)

SLAC-I-730-0A21J-005-R001

Communication Equipment Specify______________________

2 of 3

Confined Space Entry Supervisor Pre-entry Checklist

SECTION 2

Hazard Evaluation and Controls hand/arm entries) Retrieval line Tripod unit (required for vertical spaces > 5’ Fire Extinguisher -for welding/burning/hot work

Equipment rated for explosive atmospheres Other; Specify_________________________

Auxiliary lighting Personal Protective Equipment Required Yes

N/A

Yes

N/A

Hard Hat

Protective Clothing

Eye/Face Protection Hearing Protection Retrieval Body harness or wristlets (circle) Gloves; Specify Type:___________________ Respirator; Specify Type/cartridge Safety toe Shoes Other: Specify_________________________ Other: Specify_________________________

SECTION 3

Decision Tree

1. Are there any serious safety or health hazards identified in Section I or during atmospheric testing (recorded in Section 11 of the SLAC Permit)? _____ Yes (Go to Question 2.) _____ No (If the space is currently designated as a “permit space”, it can be reclassified to a non-permit space. Complete Section 9 of the permit) 2. Does the space pose an actual or potential atmospheric hazard? _____ Yes (Go to Question 3.) _____ No (Go to Question 4.) 3. Is the only hazard in the space an atmospheric hazard that can be controlled by continuous mechanical ventilation? _____ Yes (You may use the alternate entry procedures as defined through the work control process, or use permit entry procedures) _____ No (Permit entry is required. Follow procedure for entering a permit-required confined space and complete Permit) 4. Can all hazards be eliminated without entry into the space? _____ Yes (Space can be reclassified as a non-permit entry.) Complete Section 9 of the permit) _____ No (Permit entry is required. Follow procedure for entering a permit-required confined space and complete Permit)

For the purposes of this entry:  All identified hazards have been isolated or eliminated and space is not permit-required.  The identified hazards will be controlled through continuous forced air ventilation and air monitoring.  The space is permit-required. Supervisor’s name: Supervisor’s signature: Date:

22 Dec 2005 (updated 10 Sep 2008)

SLAC-I-730-0A21J-005-R001

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SLAC CONFINED SPACE ENTRY PERMIT

Number:

(see instructions - over)

POST PERMIT AT JOB SITE UNTIL JOB IS COMPLETED

IN CASE OF EMERGENCY, CALL 911 Location and description of confined space Purpose of entry Division authorizing work Other permits required (hot work, line breaking, other)

Date of entry Time of entry Expiration date and time Entrants

Entry supervisor (print) Attendants (print) Known and potential hazards in space Describe acceptable entry conditions

Precautions (Check and explain where required)  Pre-entry briefing on specific hazards and control methods  Notify contractors of permit and hazard conditions  Verify adequate confined space training  Notification to effected depts/persons of service interruption  LOTO and verifyication of zero energy  Lines blocked or broken  Air flush (preliminary or continuous)  Communication method (radio, rope signals, visual hand signals, verbal)  Lighting (hazardous location rated or standard)  Drain space  Other (specify) Rescue Procedures and Equipment  Non-entry rescue procedure and equipment in place (Attendant will extract entrant without entering space)



OR Entry rescue service and equipment ready to effect a timely rescue (considering hazards in space)



Operational and protective equipment (Check and explain where required)  Ladder  Full body harness  Lifeline  Tripod/hoist  Area security (warning signs, barricades)  Ventilation fan or blower  Fire extinguisher  SCBA  Coveralls  Face/eye protection  Footwear  Gloves (impervious, chemical, leather, other)  Air purifying respirator (specify cartridge type)  Head protection  Fall protection equipment  PIC  Radiation dosimeter(s)  Other (specify)

List rescue equipment:

Notes:

Notes:

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SLAC-I-730-0A21J-002-R003

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Sequence or serial number

Air monitoring device

Date due for calibration

Pre-use spot Notes check performed by

Air monitoring data Attendant air sampling required (continuously or every _______ minutes) Air sampling required for: (check and complete where applicable) Time

Sampled by











O2: 19.5–23.5%

<10% LEL/LFL

<25 ppm CO

<10 ppm H2S

Stratification

Other

Time IN

Time OUT

Time IN

Time OUT

Entrant IN/OUT record

Notes

Name Name Name

Work Authorization Building/area/facility manager or designee (print)

Permit authorization Competent entry supervisor's signature

Date

Time

(must be signed before entry) Date

Time

(Signature certifies that precautions and equipment are in place, atmospheric testing shows air acceptable for entry, permit is complete)

Permit cancellation Competent entry supervisor's signature

(must be signed after work is completed) Date

Time

POST PERMIT AT JOB SITE UNTIL JOB IS COMPLETED

IN CASE OF EMERGENCY, CALL 911 Instructions A confined space entry permit must be completed for all permit-required confined space (PRCS) entries. Permit numbering scheme: building number - space number - mmddyy Example: 081-03-121305 1) Contact a SLAC competent entry supervisor prior to entry to assist in space preparation and permit completion. 2) Review the existing confined space profile (available online). 3) Complete the entry permit. 4) Prepare the space for entry according to the permit. 5) The competent entry supervisor must review the permit for accuracy and completeness, determine if acceptable entry conditions are present, authorize entry, and oversee entry operations and termination. 6) The building/area/facility manager responsible for the confined space (the confined space "owner" also reviews the permit and authorizes the work with a signature. 7) Verify that qualified and trained rescue services are equipped and ready to perform a timely rescue, considering the hazards potentially present in the permit space.

9/10/2008

SLAC-I-730-0A21J-002-R003

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Confined Space Alternate Entry Permit Department: Chemical and General Safety Program: Confined Space Owner: Program Manager Authority: ES&H Manual, Chapter 6, Confined Space 1 Review the profile for this space on the PRCS Database to complete this form.

Work Plan for Entry into SLAC Confined Space Name and location:

Date:

Reason for entry: Subcontractor companies involved (if any):

Description of Space to be Entered ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________

Reason for Entry into Space ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________

Entry Plan Under paragraph (c)(5) of 29 CFR 1910.146, alternate entry procedures may be used to enter a PRCS if the only hazard is atmospheric, and that hazard can be controlled and the space maintained safe for entry with continuous forced air ventilation. Atmospheric hazards present in the space (either known or potential): ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Atmospheric hazards will be eliminated by continuous forced air ventilation based on the following data: ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________

1

SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 6, “Confined Space”, http://www-group.slac.stanford.edu/esh/hazardous_activities/confinedspace/policies.htm

22 Dec 2005 (updated 10 Sep 2008) SLAC-I-730-0A21J-010-R001

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Confined Space Alternate Entry Permit

Approvals Name: Contracting company if applicable: Name, SLAC CGS: Name, SLAC Division: Others working near this space:

Distribution Confined space program manager Confined space owner Authorized entrants

22 Dec 2005 (updated 10 Sep 2008) SLAC-I-730-0A21J-010-R001

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Confined Space Pre-entry Checklist for Non-permit Required Spaces Department: Chemical and General Safety Program: Confined Space Owner: Program Manager Authority: ES&H Manual, Chapter 6, Confined Space 1 This form must be completed prior to entering non-permit confined spaces. This applies to authorized SLAC employee entrants as well as subcontractors. A second person must be present during all non-permit confined space entries. Date: __________ Name of person completing this checklist (print): Space name and location: Reason for entry into this space: 1. Review the confined space profile for this space from the PRCS Database and review it. 2. Verify that there have not been any changes to this space since the last hazard evaluation. 3. Answer the questions below and proceed accordingly. Will there be any activities conducted inside the confined space (e.g., welding, line breaking) or any chemicals (e.g., solvents) brought into the confined space that could create a hazardous atmosphere inside the space? No

Yes

If yes, DO NOT ENTER. Contact confined space program manager for assistance.

Are there conditions in or around this confined space that could adversely affect anyone entering the confined space? No

Yes

If yes, DO NOT ENTER. Contact confined space program manager for assistance.

If both questions were answered “NO”: 1. 2. 3. 4. 5.

Secure the work site. Install barriers and post warning signs. Take measures to prevent any hazards on the outside of the space. Control vehicular and pedestrian traffic. Ensure second person is present.

Note: any indication of an abnormal condition inside the space is cause to evacuate the space immediately. Return this completed form to confined space program manager. Debrief personnel involved after the entry.

1

SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 6, “Confined Space”, http://www-group.slac.stanford.edu/esh/hazardous_activities/confinedspace/policies.htm

22 Dec 2005 (updated 10 Sep 2008) SLAC-I-730-0A21J-006-R001

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Confined Space PRCS Competent Entry Supervisor Designation Form Department: Chemical and General Safety Program: Confined Space Owner: Program Manager Authority: ES&H Manual, Chapter 6, Confined Space 1 Candidate’s Name

Supervisor Name

Division/Department Education and Training (include dates and type of proficiency testing)

Person making this designation (print) Signature Designee Acceptance of Designation (sign) Date

1

SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 6, “Confined Space”, http://www-group.slac.stanford.edu/esh/hazardous_activities/confinedspace/policies.htm

22 Dec 2005 (updated 10 Sep 2008) SLAC-I-730-0A21J-007-R001

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Confined Space Profile Form Department: Chemical and General Safety Program: Confined Space Owner: Program Manager Authority: ES&H Manual, Chapter 6, Confined Space 1

Confined Space Number: Location(s): Function:

Description Space dimensions (internal): Portal dimensions, locations, and elevations: Type of entry required: Type of space:

Vertical

Permit Space

Horizontal Non-permit Space

General Information ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________

Equipment within Space ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________

Hazards ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________

1

SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 6, “Confined Space”, http://www-group.slac.stanford.edu/esh/hazardous_activities/confinedspace/policies.htm

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Confined Space Profile Form

Air Monitoring Testing Atmospheric Test

Top

Middle

Bottom

Monitoring Equipment

% Oxygen

% Lower explosive limit

Carbon monoxide

Hydrogen sulfide

Hydrogen fluoride

Ammonia

Hydrogen chloride

Hydrogen sulfide

Chlorine

Sulfur dioxide

Nitrogen dioxide

Carbon monoxide

Carbon dioxide

22 Dec 2005 (updated 10 Sep 2008) SLAC-I-730-0A21J-008-R001

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Confined Space Profile Form

Existing Hazards / Potential Hazards Potential hazardous atmosphere (O2 <19.5 %, > PEL for toxics/corrosives, >10%LEL)

Cold sufficient to cause hypothermia or injury

Material that may engulf an entrant or be aspirated

Heat sufficient to cause heat exhaustion or injury

Low-lying region that may collect exhaust, gas, and vapor

Mechanical hazard with crushing potential, rotating blades, etc.

Oxidation (i.e., from decaying of organic matter as in a vault)

Electrical hazard from high voltage, water hazards, etc.

Configuration that may entrap or asphyxiate an entrant.

Other airborne materials specify

Pressurized fluids or gases present in space

Toxic or hazardous liquids present

Other features of space

Remote or elevated location High noise area Fall hazard Poor visibility, lighting Other (describe)

Purpose of entry

Maintenance/repair Inspection Custodial Contractor access only Municipal employee access only

Prepared by: Note: SLAC is required to follow 29 CFR 1910.146. This profile is intended to meet this requirement and covers information about the features, hazards and potential hazards in and around this confined space so that a permit and procedures can be effectively and accurately completed. It does not cover hazards that may be brought into this space. Spaces will be reviewed periodically for re-evaluation.

22 Dec 2005 (updated 10 Sep 2008) SLAC-I-730-0A21J-008-R001

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Confined Space Reclassification Form Department: Chemical and General Safety Program: Confined Space Owner: Program Manager Authority: ES&H Manual, Chapter 6, Confined Space 1 Review the profile for this space on the PRCS Database to complete this form.

Work Plan for Entry into SLAC Confined Space Name and location:

Date:

Reason for entry: Subcontractor companies involved (if any):

Description of Space to be Entered ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________

Reason for Entry into Space ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________

Entry Plan Under paragraph (c)(7) of 29 CFR 1910.146, if all hazards associated with a permitrequired confined space can be eliminated prior to entry, then the space can be reclassified as a non-permit required confined space for the time necessary to accomplish the work and the hazards remain eliminated. Hazards present in the space (either known or potential hazards) ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ Hazards will be eliminated by the following means (provide full details for all hazards): ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________

1

SLAC Environment, Safety, and Health Manual (SLAC-I-720-0A29Z-001), Chapter 6, “Confined Space”, http://www-group.slac.stanford.edu/esh/hazardous_activities/confinedspace/policies.htm

22 Dec 2005 (updated 10 Sep 2008) SLAC-I-730-0A21J-009-R001

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Confined Space Reclassification Form

Approvals Name: Contracting company if applicable: Name, SLAC CGS: Name, SLAC directorate: Others working near this space:

Distribution Confined space program manager Confined space owner Authorized entrants

22 Dec 2005 (updated 10 Sep 2008) SLAC-I-730-0A21J-009-R001

2 of 2