excavation/trenching plan requirements
TRANSCRIPT
Project Documentation Document SAF-0001
Revision A
Advanced Technology Solar Telescope 950 N. Cherry Avenue Tucson, AZ 85719 Phone 520-318-8102 [email protected] http://atst.nso.edu Fax 520-318-8500
Excavation/Trenching Plan Requirements
B. Simison, S. Shimko Project Site and Safety Group
September 2013
Excavation/Trenching Plan Requirements
SAF-0001 Rev A Page ii
REVISION SUMMARY:
1. Date: 25 September 2013 Revision: A Changes: Original release
Excavation/Trenching Plan Requirements
SAF-0001 Rev A Page iii
Table of Contents
Introduction ................................................................................................. 4
1. IDENTIFY THE COMPETENT PERSON, THEIR RESPONSIBILITIES AND QUALIFICATIONS .......................................................................................................... 5
2. DESCRIPTION OF THE PROJECT OR TASKS TO BE PERFORMED ................ 6 3. PROPOSED METHOD FOR DAMAGE PREVENTION ........................................ 8 4. PROJECTED DIMENSIONS OF THE EXCAVATION/TRENCH ......................... 10 5. PROJECTED SOIL TYPE ................................................................................... 12 6. PLANNED METHOD OF SHORING, SLOPING, AND/OR BENCHING .............. 13
7. ACCESS AND EGRESS ..................................................................................... 15 8. CONFINED SPACE ............................................................................................. 16
9. PERIMETER PROTECTION ............................................................................... 17 10. PLAN FOR TRAFFIC CONTROL ........................................................................ 18
11. PLAN FOR MANAGEMENT OF EXCAVATED SOIL, ASPHALT, CONCRETE .. 19 12. RESCUE PLAN AND PROCEDURES ................................................................ 20
13. EXCAVATION/TRENCHING TRAINING ROSTER ............................................. 21
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Introduction
Contractors are required to complete this plan and shall describe, in detail, the specific practices, equipment,
and methods used to protect a worker from excavation and/or trenching hazards. An Excavation/Trenching
Plan and Activity Hazard Analysis (AHA) are required for excavations and trenches greater than 5’ deep.
Excavations and trenches less than 5’ deep require an AHA but the plan is optional. Refer to OSHA
1926.650 / HIOSH 12-132.2 while preparing the plan.
Contract Number, Title, and Area Location:
Contractor:
Subcontractor:
Plan Preparer Name, Title, and Company:
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1. IDENTIFY THE COMPETENT PERSON, THEIR RESPONSIBILITIES AND
QUALIFICATIONS
A Competent Person in Excavation and Trenching is defined in OSHA as “one who is capable of identifying
existing and predictable hazards in the surroundings or working conditions which are unsanitary, hazardous,
or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate
them". The Competent Person is also responsible for completing the (and when conditions change) ATST
Guide for Daily Inspection of Tranches and Excavations.
Competent Person Name:
Qualifications (attach certificates):
Alternate Competent Person Name:
Qualifications (attach certificates):
Daily inspections of excavations, the adjacent areas, and protective systems shall be made by a competent
person for evidence of a situation that could result in possible cave-ins, indications of failure of protective
systems, hazardous atmospheres, or other hazardous conditions. An inspection shall be conducted by the
competent person prior to the start of work and as needed throughout the shift. Inspections shall also be
made after every rainstorm or other hazard increasing occurrence. These inspections are only required when
employee exposure can be reasonably anticipated. See inspection form at the end of this plan.
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2. DESCRIPTION OF THE PROJECT OR TASKS TO BE PERFORMED
1. In the box below or attach a written description of the design features of work.
2. Attach a diagram/sketch of the work area and mark the location of the proposed excavation or trench.
Include in the diagram/sketch any adjacent or nearby structures. Include in the diagram/sketch all
adjacent or nearby utilities and mark the location of the corresponding shut-off valves as required.
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3. PROPOSED METHOD FOR DAMAGE PREVENTION
1. Explain methods for preventing damage to overhead utility lines, trees, and other man-made facilities or
natural features designated to remain within or adjacent to the construction rights-of-way.
2. Attach a copy of any relevant pages of a Utility Coordination Report or like.
Hawaii Utility Notification Center call 811 or 1-866-423-7287
3. Ensure a copy of the Emergency Utility Repair plan if available, is on site.
4. In the event of utility damage contact the ATST Construction Supervisor.
Utility Damage, ATST Construction Supervisor. Phone No. 808-357-3364
Maui Electric Company Phone No. 808-871-7777
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4. PROJECTED DIMENSIONS OF THE EXCAVATION/TRENCH
Include the projected minimum-to-maximum depth, length and width.
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5. PROJECTED SOIL TYPE
Attach a copy of the site soils report. Each soil and rock deposit shall be classified by a competent person as
Stable Rock, Type A, Type B, or Type C.
Stable Rock Type A Type B Type C
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6. PLANNED METHOD OF SHORING, SLOPING, AND/OR BENCHING
1. Explain the intended method of preventing the excavation /trench from collapse.
2. Ensure that any needed tabulated data is available on-site with the competent person.
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7. ACCESS AND EGRESS
A means of egress out of the excavation/trench must be located within 25’ of any worker. Explain the
intended method of meeting that standard.
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8. CONFINED SPACE
Is the excavation/trench a confined space? If yes, complete a corresponding Confined Space Plan for ATST
SH&E acceptance.
Yes No
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9. PERIMETER PROTECTION
Explain how the perimeter of the excavation/trench will be protected from workers or the public. Walkways
or bridges shall be provided with standard guardrails where people or equipment are required or permitted to
cross over excavations.
Class 1. If the excavation is exposed to members of the public or vehicles or equipment (Class 1), then the
perimeter protection shall meet the following: (1) Have the strength, height, and maximum deflection
requirements for guardrails; (2) Provide fall protection equivalent to that provided by a top rail, midrail, and
toe board; and (3) Have post spacing equivalent to a standard guardrail. Perimeter protection guarding
against traffic (vehicles and/or equipment) falling into an excavation shall be designed, by a qualified
person, to withstand the potential forces and bending moments due to impact by traffic.
Class 2. If the excavation does not meet the requirements above (exposed to members of the public or
vehicles or equipment) but is (1) routinely exposed to employees, and (2) either is deeper than 6 ft (1.8 m) or
(3) contains hazards (e.g., impalement hazards, hazardous substances), then the perimeter protection (Class
2) shall consist of warning barricades or flagging placed at a distance not closer than 6 ft (1.8 m) from the
edge of the excavation: warning barricades or flagging need to display an adequate warning at an elevation
of 3 ft (0.9 m) to 4 ft (1.2 m) above ground level.is the minimum protection required. When workers are in
the zone between the warning barricades/ flagging and the excavation, they shall be provided with fall
protection.
Class 3. If the excavation does not meet the requirements for either perimeter protection above, then the
minimum protection required (Class 3) are: warning barricades or flagging placed a distance not closer than
6 in (15.2 cm) nor more than 6 ft (1.8 m) from the edge of the excavation: warning barricades or flagging do
need to display an adequate warning at an elevation of 3 ft (0.9 m) to 4 ft (1.2 m) above ground level.
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10. PLAN FOR TRAFFIC CONTROL
Attach a copy of the ATST accepted Traffic Control Plan (TCP). If the Traffic Control Plan has not been
accepted or developed, this Excavation/Trenching Plan can still be submitted and accepted, but any work
that impedes traffic cannot proceed until there is an accepted Traffic Control Plan.
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11. PLAN FOR MANAGEMENT OF EXCAVATED SOIL, ASPHALT, CONCRETE
1. Spoils must be placed a minimum of 2’ from the edge of the trench/excavation.
2. Attach a copy of the on and/or off site truck haul route, if applicable.
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12. RESCUE PLAN AND PROCEDURES
The contractor must have a plan to self-perform the rescue of an injured or engulfed worker without relying
on offsite emergency assistance. Attach or detail plan below. However, Emergency Services must still be
contacted to provide rescue and/or injury support.
EMERGENCY PHONE No. 911
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13. EXCAVATION/TRENCHING TRAINING ROSTER
1. All affected workers must review and understand the Excavation/Trenching Plan.
2. All contractors and subcontractor workers exposed to Excavation and Trenching hazards shall be
trained accordingly.
3. All personnel signing this form indicate that they understand the excavation and/or trenching
hazards, and the accepted methods of control of these hazards, on this job site. Review and
sign again if hazards, methods, or work change.
Print Name Signature Date
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ATST Guide for Daily Inspection of Trenches and Excavations
Contractor:
Date: Weather: Soil Type:
Trench Depth:
Length: Width: Type of Protective System:
Yes No N/A Excavation
Excavations and Protective Systems inspected by Competent Person daily, before start of work.
Competent Person has authority to remove workers from excavation immediately.
Surface encumbrances supported or removed.
Employees protected from loose rock or soil.
Hard hats worn by all employees.
Spoils, materials, and equipment set back a minimum of 2' from edge of excavation.
Barriers provided at all remote excavations, wells, pits, shafts, etc.
Walkways and bridges over excavations 6' or more in depth equipped with guardrails.
Warning vests, or other highly visible PPE provided and worn by all employees exposed to vehicular traffic.
Employees prohibited from working or walking under suspended loads.
Employees prohibited from working on faces of sloped or benched excavations above other employees.
Warning system established and used when mobile equipment is operating near edge of excavation.
Yes No N/A Utilities
Utility companies contacted and/or utilities located.
Exact location of utilities marked when near excavation.
Underground installations protected, supported, or removed when excavation is open.
Yes No N/A Wet Conditions
Precautions taken to protect employees from accumulation of water.
Water removal equipment monitored by Competent Person.
Surface water controlled or diverted.
Inspection made after each rainstorm.
Yes No N/A Hazardous Atmosphere
Atmosphere tested when there is a possibility of oxygen deficiency or build-up of hazardous gases.
Oxygen content is between 19.5% and 21%.
Ventilation provided to prevent flammable gas build-up to 20% of lower explosive limit of the gas.
Testing conducted to ensure that atmosphere remains safe.
Emergency Response Equipment readily available where a hazardous atmosphere could or does exist.
Employees trained in the use of Personal Protective and Emergency Response Equipment.
Safety harness and life line individually attended when employees enter deep confined excavation.
Competent Person name (print) Signature
Date