Pre-Trenching Checklist V1

• Document No.

• Audit Title

• Client / Site

• Conducted on

  Date

• Prepared by

• Trench details

• Location

  Media

• Personnel

SERVICES, PIPELINES & DRAINAGE

• Has the trench Location, Line & Depth been set out to Plans

  Yes

  No

  N/A

• For Drainage are Inverts and Falls confirmed

  Yes

  No

  N/A

• Have Plans been assessed to locate any services and drainage within the work area

  Yes

  No

• STOP. Do not proceed until Service Plans have been assessed

• Has a visual assessment of the work area been made to check for presence of undocumented services or pipelines

  Yes

  No

• STOP. Do not proceed until a visual assessment is made

• Have all utilities and drainage been located prior to beginning trenching operations?

  Yes

  No

• STOP. Do not proceed until Service Plans have been assessed & CAT Scan has located all utilities.

• Has a CAT Scan been undertaken

  Yes

  No

• STOP. Do not proceed until a CAT Scan has been undertaken

• Do Services require physical location to check position and depth

  Yes

  No

  N/A

• Confirm Location & Depth

• Show evidence

  Media

• Provide details of CAT Calibration dates

• Add media

  Media

• Are adjacent structures affected by the works and do they require stabilisation or protection to prevent collapse?

  Yes

  No

  N/A

• Show Notes

• STOP trenching operation immediately. Inform MJA Management and Cimolai Rimond Managers, make the area safe and await further instruction.

• Are other Features or Trees protected and identified?

  Yes

  No

  N/A

• Show Notes

• STOP trenching operation immediately. Inform MJA Management and Cimolai Rimond Managers, make the area safe and await further instruction

SOIL TESTING

• Has a VISUAL test been performed or will test be performed to classify the soil type?

  Yes

  No

  N/A

• What type(s) of test?

  Select Estimated Particle Size Estimated cohesiveness Checked sides for cracks Identified adjacent previously disturbed soils Identified layered systems Checked for evidence of surface water, water seeping from sides, location of water table Observed adjacent area and excavation for sources of vibration.

  • Estimated Particle Size
  • Estimated cohesiveness
  • Checked sides for cracks
  • Identified adjacent previously disturbed soils
  • Identified layered systems
  • Checked for evidence of surface water, water seeping from sides, location of water table
  • Observed adjacent area and excavation for sources of vibration.

• STOP. For Deep Excavations over 600mm at least one visual and one manual test is required to be documented.

• Has a MANUAL test been performed or will test be performed to classify the soil type?

  Yes

  No

• What type(s) of test?

  Select Plasticity Dry Strength Thumb Penetration Penetrometer/Shear Vane Drying Test

  • Plasticity
  • Dry Strength
  • Thumb Penetration
  • Penetrometer/Shear Vane
  • Drying Test

• STOP. For Deep Excavations at least one visual and one manual test is required to be documented.

• What is the soil classification?

  Select Stable Rock Constructive Layers ie Concrete, Tarmac, Stone or Fill Firm Clay Soft Clay Gravels Sands Silts Buried Waste Contaminated Ground

  • Stable Rock
  • Constructive Layers ie Concrete, Tarmac, Stone or Fill
  • Firm Clay
  • Soft Clay
  • Gravels
  • Sands
  • Silts
  • Buried Waste
  • Contaminated Ground

EMPLOYEE PROTECTION

• Are Barriers in place for the works

  Yes

  No

  N/A

• Are all spoils and equipment to be kept at least 1m from the edge of the trench?

  Yes

  No

• Add media

  Media

• STOP trenching operation and inform Supervisor. Do not continue until materials or equipment are moved back from trench.

• Is the trench more than 300mm deep?

  Yes

  No

  N/A

• A means of safe egress must be provided. What type(s) of egress are available?

  Select Ladder Ramp

  • Ladder
  • Ramp

• Is the trench 600mm deep or more NOTE: For trenches deeper than 600mm, protective system use must be assessed and agreed. For deep trenching or poor soils Temporary Works must be designed by a registered professional engineer.

  Yes

  No

  N/A

• What type of protective system is being used? NOTE: if no protective system is being used, STOP operation immediately, inform Supervisor and Site Manager.

  Select Trench Box Shore Sheet Pile Rock (N/A) Slope Stepped Back Excavations (Min 1 m : 1 m) Trench Monitoring (<1 m deep only)

  • Trench Box
  • Shore
  • Sheet Pile
  • Rock (N/A)
  • Slope
  • Stepped Back Excavations (Min 1 m : 1 m)
  • Trench Monitoring (<1 m deep only)

• Are employees protected from cave-in hazards when entering or exiting the trench box

  Yes

  No

• Add media

  Media

• STOP trenching operation. Inform Site Management and establish proper means of egress from trench box.

• Is the distance between the bottom of the trench box and the bottom of the trench no more than 450mm?

  Yes

  No

• Add media

  Media

• STOP trenching operation. Inform Site Management and make necessary adjustments prior to continuing work.

• Provide information on System employed

• Is the trench exposed to vehicular traffic or mobile equipment?

  Yes

  No

  N/A

• IF the operator does not have a clear and direct view of the edge, is a warning system in place?

  Yes

  No

• Define

  Select Barricades Hand/Arm Signals Stop Logs

  • Barricades
  • Hand/Arm Signals
  • Stop Logs

• Is the trench free of operations which would make it a permit required confined space such as hazardous equipment, toxic chemicals in the work processes, exposure to nearby roads?

  Yes

  No

• Add media

  Media

• STOP trenching operation. Inform Supervisor and Safety Manager.

GENERAL

• Is there a competent person present to oversee trenching operations?

  Yes

  No

• Name of competent person?

• STOP. Work is not allowed without a competent person present.

• Are trench inspections documented?

  Yes

  No

• Provide excavation checklist to foreman.

• How many times per day?

  1

  2

  3

  4

  5+

• Is this excavation safe to proceed

  Safe

  At Risk

  N/A

• Signed:

  Sign