Excavation/Trenching Plan Requirements

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


SAF-0001 Rev A Page ii

REVISION SUMMARY:

1. Date: 25 September 2013 Revision: A Changes: Original release


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

Excavation / Trenching Plan Requirements

SAF-0001, Revision A of 18

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:



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.



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.



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



4. PROJECTED DIMENSIONS OF THE EXCAVATION/TRENCH

Include the projected minimum-to-maximum depth, length and width.



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



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.



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.



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



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.



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.



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.



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



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



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

http://www.osha.gov/SLTC/etools/construction/trenching/competent_person.html

Excavation/Trenching Plan Requirements

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