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Ground Disturbance Level II study materials
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Ground Disturbance Level II practice questions

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Question 1Ground disturbance planning and hazard assessment

Before any ground disturbance begins, what is the primary purpose of a hazard assessment of the work area?

  1. To estimate the total cost of the project for the client's approval
  2. To record the names of workers who will later operate the excavation equipment
  3. To identify buried facilities and other hazards so controls can be planned before work starts Correct answer.
  4. To confirm that the project schedule meets the contractor's deadlines

Explanation

A pre-work hazard assessment exists to find hazards, especially buried facilities, before soil is broken. Identifying them early allows the employer to design controls such as hand exposure, locate tickets, and safe excavation methods. Cost and scheduling are separate planning functions and do not drive hazard control.

Question 2Ground disturbance planning and hazard assessment

In ground disturbance terminology, what does a "buried facility" generally refer to?

  1. Any surface structure such as a fence or signpost near the dig site
  2. Any underground pipe, cable, conduit, or structure that could be damaged by excavation Correct answer.
  3. Only municipal water mains larger than 300 mm in diameter
  4. Only high-voltage electrical transmission lines owned by utilities

Explanation

Buried facilities are any subsurface installations such as pipelines, cables, conduits, and structures. The concept is broad because damage to any of them can injure workers or disrupt services. Restricting the definition to one utility type or to surface objects misstates the scope.

Question 3Ground disturbance planning and hazard assessment

Who is normally responsible for requesting locates from the one-call service before a ground disturbance?

  1. The facility owner who operates the pipeline being protected
  2. The equipment rental company supplying the excavator
  3. The ground disturbance contractor or the person causing the disturbance Correct answer.
  4. The local municipal building inspector

Explanation

The party that causes the disturbance, typically the contractor or excavator, must notify the one-call service within the required time before digging. Facility owners respond to the request but do not initiate it on the digger's behalf. Regulators and rental companies have no duty to file the locate request.

Question 4Ground disturbance planning and hazard assessment

Why must the search area for buried facilities extend beyond the actual excavation footprint?

  1. Because tolerance zones and locate inaccuracies mean facilities near the edge can still be struck Correct answer.
  2. Because the extra area is used to store excavated spoil
  3. Because regulators require a fixed ten-metre buffer around every project
  4. Because facility owners refuse to mark lines inside the trench

Explanation

Locating equipment has limited accuracy, and tolerance zones require careful digging near marks. A facility just outside the planned trench can still be damaged by bucket swing, cave-in, or mislocation. Extending the search area creates a safety margin rather than serving storage or marking convenience.

Question 5Ground disturbance planning and hazard assessment

A locate request was submitted, but the marks are faded and the ticket has expired. What is the safest course of action before digging?

  1. Ask a co-worker to redraw the marks from memory
  2. Proceed carefully using the faded marks as a general guide
  3. Dig with a hand tool only and ignore the expired ticket
  4. Stop and submit a new locate request, then wait for fresh marks and a valid ticket Correct answer.

Explanation

Locate tickets have a limited validity period, and faded marks cannot be relied on for safe excavation. The correct action is to renew the request so facilities are re-marked and the ticket is current. Digging on stale information or recreating marks from memory defeats the locate system.

Question 6Ground disturbance planning and hazard assessment

What is the purpose of a tolerance zone around a marked buried facility?

  1. To reserve space for future utility installations along the corridor
  2. To define the area where facility owners may park their service vehicles
  3. To set the maximum depth at which mechanical excavation is allowed
  4. To require careful hand exposure before powered digging near the marked line Correct answer.

Explanation

The tolerance zone is a buffer around the marked facility within which mechanical digging is restricted. Workers must expose the line carefully, usually by hand, to confirm its exact position before using equipment. It is a safety buffer, not a reservation for future utilities or a parking area.

Question 7Ground disturbance planning and hazard assessment

Which control is most appropriate when mechanical excavation must occur close to a marked buried pipeline?

  1. Increase engine speed so the excavation is completed faster near the line
  2. Hand expose the facility first, then use controlled mechanical digging with a spotter Correct answer.
  3. Remove the locate marks so the operator is not distracted
  4. Backfill the trench immediately to hide the exposed pipe

Explanation

Hand exposure confirms the exact location and depth of the facility before machines work nearby. Controlled digging with a spotter then reduces the chance of contact. Faster digging, removing marks, or hiding the pipe all increase risk rather than controlling it.

Question 8Ground disturbance planning and hazard assessment

During the planning phase, why is a visual site walk-around valuable even after locates have been completed?

  1. It reveals surface clues and site conditions that records and marks may not show Correct answer.
  2. It replaces the need to request locates from the one-call service
  3. It guarantees that no buried facility exists within the work area
  4. It allows the contractor to skip the hazard assessment document

Explanation

A walk-around can reveal surface indicators such as depressions, valves, risers, and abandoned lines that records may miss. It supplements, but never replaces, the locate request and written assessment. No visual inspection can guarantee that the ground is free of facilities.

Question 9Ground disturbance planning and hazard assessment

What should a ground disturbance plan identify about each known buried facility in the work area?

  1. Only the colour of the paint used to mark it on the surface
  2. Its type, approximate location and depth, owner, and the controls required near it Correct answer.
  3. The resale value of the material used to construct it
  4. Only the name of the utility company that owns it

Explanation

A useful plan records what each facility is, where and how deep it lies, who owns it, and how work will be controlled near it. These details let crews choose exposure methods and emergency contacts. Mark colour, ownership alone, or material value do not support safe excavation decisions.

Question 10Ground disturbance planning and hazard assessment

A crew discovers an unmarked buried cable while trenching. What is the immediate correct response?

  1. Continue trenching but slow the equipment to half speed
  2. Cover the cable with soil and continue in the same alignment
  3. Cut the cable to remove it from the excavation path
  4. Stop work in the area, keep clear, and notify the facility owner and supervisor Correct answer.

Explanation

An unmarked facility means the locate information was incomplete, so work must stop until the hazard is assessed. The owner and supervisor need notification so the line can be identified and controls established. Continuing, covering, or cutting the cable risks injury and service disruption.

Question 11Ground disturbance planning and hazard assessment

Why should emergency contact numbers for facility owners be included in the ground disturbance plan?

  1. So the contractor can bill the owner for routine excavation costs
  2. So workers can request permission to cross the easement
  3. So a strike or leak can be reported immediately and the area isolated quickly Correct answer.
  4. So the plan satisfies a documentation style requirement only

Explanation

If a line is struck, fast notification lets the owner shut down or isolate the facility and helps protect workers and the public. Contact numbers are an operational safety tool, not a billing or permitting convenience. Their value is measured in response time during an emergency.

Question 12Ground disturbance planning and hazard assessment

Which factor most strongly increases the hazard level of a ground disturbance near a high-pressure gas pipeline?

  1. The colour of the pipeline coating used by the operator
  2. The number of workers assigned to the excavation crew
  3. The distance from the site to the nearest paved road
  4. The potential for a rupture that could ignite or release a large volume of gas Correct answer.

Explanation

High-pressure gas lines carry the risk of a large, potentially ignited release if struck, which raises severity dramatically. Hazard level depends on the consequence of failure, not on coating colour, crew size, or road proximity. Severity and likelihood together drive the control strategy.

Question 13Ground disturbance planning and hazard assessment

What does the likelihood component of a risk assessment for ground disturbance estimate?

  1. The volume of soil that will be removed from the trench
  2. The probability that a hazard such as a facility strike will occur given current controls Correct answer.
  3. The number of days the project will run past schedule
  4. The total cost of repairing a damaged facility after a strike

Explanation

Likelihood estimates how probable an unwanted event is under existing conditions and controls. Combined with severity, it produces the risk rating that guides control selection. Cost, schedule, and soil volume are project metrics, not probability estimates.

Question 14Ground disturbance planning and hazard assessment

A planner is choosing controls for a dig near a fibre optic line. Which approach best follows the hierarchy of controls?

  1. Rely on PPE such as gloves as the primary control near the line
  2. Eliminate the need to dig near the line, then use engineering and administrative controls, then PPE Correct answer.
  3. Use PPE first and add engineering controls only after an incident
  4. Start with administrative controls and use elimination only if they fail

Explanation

The hierarchy of controls prioritizes eliminating the hazard, then engineering and administrative measures, with PPE as the last line of defence. Relocating the work or the line removes exposure entirely. Starting with PPE or administrative measures inverts the hierarchy and leaves workers exposed.

Question 15Ground disturbance planning and hazard assessment

Why is a pre-job safety meeting, often called a tailgate meeting, held before ground disturbance work begins?

  1. To satisfy payroll requirements for the day's shift
  2. To assign equipment maintenance tasks for the following week
  3. To review the specific hazards, controls, and roles with the crew on that site Correct answer.
  4. To collect worker signatures for the project's insurance file

Explanation

A tailgate meeting communicates the site-specific hazard assessment and confirms that each worker understands controls and responsibilities. It is a communication and verification step, not a payroll, maintenance, or insurance exercise. Crew understanding is what makes the written plan effective.

Question 16Ground disturbance planning and hazard assessment

What is the main risk of relying solely on as-built drawings to locate buried facilities?

  1. Drawings cannot be stored in a site office for reference
  2. Drawings are always more accurate than electronic locating equipment
  3. Drawings may be inaccurate or out of date and do not confirm the actual position of the line Correct answer.
  4. Drawings are only issued to facility owners and never to contractors

Explanation

As-built records can be incomplete, generalized, or outdated after modifications, so they cannot confirm where a line actually lies. They are useful planning references but must be verified with locates and careful exposure. Treating drawings as definitive creates false confidence.

Question 17Ground disturbance planning and hazard assessment

Which condition should prompt a reassessment of the ground disturbance hazard plan during the project?

  1. A routine lunch break taken by the crew
  2. A forecast of light cloud cover for the afternoon
  3. A change in excavation depth or alignment that moves work closer to a facility Correct answer.
  4. A scheduled delivery of gravel to a staging area

Explanation

Hazard assessments are living documents that must be updated when conditions change, especially when the work moves closer to a buried facility. Routine breaks, weather forecasts, and material deliveries do not alter the facility hazard unless they change site conditions. Reassessment keeps controls matched to the actual risk.

Question 18Ground disturbance planning and hazard assessment

What is the role of a spotter during mechanical excavation near buried facilities?

  1. To watch the excavation and guide the operator to keep the bucket clear of the marked line Correct answer.
  2. To document the volume of spoil removed for billing purposes
  3. To operate a second excavator in the same trench simultaneously
  4. To take soil samples for geotechnical testing

Explanation

A spotter maintains line of sight with the operator and the facility, warning of proximity and directing safe bucket movement. The spotter is a dedicated safety role, not a second machine operator or a sampling technician. Clear communication prevents accidental contact.

Question 19Ground disturbance planning and hazard assessment

A utility owner's locate marks show a line running diagonally through the proposed trench. What should the plan require before machine digging crosses that line?

  1. Ask the operator to judge the line's depth by feel
  2. Backfill the trench and relocate the project to a new site
  3. Dig through the crossing quickly to minimize exposure time
  4. Hand expose the line at the crossing and support or protect it before equipment proceeds Correct answer.

Explanation

Where a machine must cross a known line, the facility should be hand exposed and protected or supported so it is not damaged by bucket contact or soil movement. Judging depth by feel or rushing through the crossing is unsafe. Abandoning the site is unnecessary if proper controls are used.

Question 20Ground disturbance planning and hazard assessment

Why does the hazard assessment need to consider adjacent properties and third parties near the excavation?

  1. Adjacent owners must pay for all locate services
  2. Excavation can affect buried services and stability beyond the property line, endangering others Correct answer.
  3. Property lines determine which workers may operate equipment
  4. Third parties are always responsible for the contractor's safety

Explanation

Digging can undermine shared services, slopes, or structures that extend past the property boundary, so the assessment must look beyond the immediate site. Third parties such as neighbours and the public may be exposed to those hazards. Property lines do not shift safety responsibility away from the contractor.

Question 21Ground disturbance planning and hazard assessment

What is the best reason to record the results of the hazard assessment in writing before work starts?

  1. It creates a documented basis for controls and communication that can be reviewed and updated Correct answer.
  2. It eliminates the need for any further site inspection
  3. It allows the contractor to skip the one-call locate process
  4. It transfers legal liability for the work to the facility owner

Explanation

A written assessment records identified hazards and chosen controls, giving a reference for training, verification, and updates as conditions change. It does not remove the need for ongoing inspection or for locates. Liability remains with the parties responsible for the work.

Question 22Ground disturbance planning and hazard assessment

Which situation best demonstrates that a ground disturbance plan has been effectively communicated to the crew?

  1. The supervisor alone knows the contents of the plan
  2. Workers have signed the plan without reading it
  3. Workers can describe the buried facilities near their task and the controls they must follow Correct answer.
  4. The plan is locked in the site office for safekeeping

Explanation

Effective communication means each worker understands the hazards and controls relevant to their own task. Signatures without understanding, locked documents, or knowledge held only by the supervisor do not demonstrate comprehension. Verification through questioning confirms the message was received.

Question 23Ground disturbance planning and hazard assessment

During planning, a crew finds a valve box and a riser in the work area but no corresponding locate marks. How should this be interpreted?

  1. As proof that the area contains no buried facilities
  2. As a decorative feature unrelated to underground services
  3. As debris that can be removed with the excavator immediately
  4. As surface evidence of an unmapped facility that requires further investigation before digging Correct answer.

Explanation

Valve boxes and risers are surface indicators of subsurface infrastructure and may reveal facilities not captured by the locate. They warrant investigation and notification before excavation. Removing them with a machine or dismissing them as decoration could damage an active line.

Question 24Ground disturbance planning and hazard assessment

What should the plan specify for the period after excavation is complete and before backfill?

  1. Removal of all locate marks before the trench is closed
  2. Immediate backfill without inspection to save time
  3. Inspection of exposed facilities for damage and confirmation that bedding and support are adequate Correct answer.
  4. Re-energizing any isolated lines without owner approval

Explanation

Before backfill, exposed facilities should be inspected for damage and properly bedded and supported to prevent future failure. Immediate backfill can conceal damage, and removing marks or re-energizing lines without approval creates new hazards. The post-exposure check is a key control point.

Question 25Ground disturbance planning and hazard assessment

A project spans several weeks and crosses a season with frozen ground followed by spring thaw. Why should the hazard assessment be revisited at the thaw?

  1. Spring weather has no effect on buried facility hazards
  2. Frozen ground permanently locks facilities in place for the year
  3. Thaw can shift soil and facilities, changing depths and stability assumptions in the plan Correct answer.
  4. Locate tickets never expire, so no review is needed

Explanation

Freeze and thaw cycles can move soil and alter the depth or position of buried facilities, invalidating earlier assumptions. Revisiting the assessment at the thaw keeps controls aligned with current conditions. Weather and ground movement are legitimate triggers for reassessment.

Question 26Ground disturbance planning and hazard assessment

Which document should be consulted first to confirm the legal locate requirements before a ground disturbance begins in a given jurisdiction?

  1. The contractor's equipment maintenance log
  2. The current ground disturbance regulations or pipeline act for that area Correct answer.
  3. A general excavation textbook from another country
  4. The facility owner's marketing brochure

Explanation

Legal locate and notification duties are set by the statute and regulation in force where the work occurs, so the current act or regulation for that jurisdiction is the authoritative starting point. Brochures, foreign texts, and maintenance records do not carry legal obligations.

Question 27Ground disturbance planning and hazard assessment

What is the primary purpose of a ground disturbance plan?

  1. To schedule crew overtime hours
  2. To replace the need for locate requests
  3. To identify hazards and controls before work disturbs the ground Correct answer.
  4. To document the site's real estate value

Explanation

A ground disturbance plan is a pre-work document that identifies the buried facilities, hazards, and controls so the work can proceed safely. It supports but never replaces the formal locate request process.

Question 28Ground disturbance planning and hazard assessment

Which piece of information is essential when compiling a list of facility owners to notify before digging?

  1. The owner's annual revenue
  2. The owner's staffing history
  3. The owner's emergency and locate contact details Correct answer.
  4. The colour of the owner's vehicles

Explanation

Notification must reach the correct facility owner quickly, so current locate and emergency contacts are essential. Financial, fleet, and staffing details do not affect notification or safety.

Question 29Ground disturbance planning and hazard assessment

What does a locate request ticket number typically provide to the planner?

  1. Permission to dig without marks
  2. The depth of every buried line
  3. A guarantee that no facilities exist
  4. A reference to track the locate and confirm it was requested Correct answer.

Explanation

The ticket number is a traceable reference proving a locate was requested and allowing follow-up on its status. It does not certify that no facilities exist, authorise digging without marks, or supply depths.

Question 30Ground disturbance planning and hazard assessment

In a ground disturbance hazard assessment, what does the severity component estimate?

  1. The cost of the excavation permit
  2. How often an incident might occur
  3. The potential consequence if a hazard is realized Correct answer.
  4. How many workers are on site

Explanation

Severity describes the potential harm or consequence of an event, while likelihood describes how often it might happen. Together they form the risk rating used to prioritise controls.

Question 31Ground disturbance planning and hazard assessment

Why should the ground disturbance plan be reviewed with the locate documentation attached?

  1. To satisfy photocopier usage targets
  2. To confirm marks match the facilities listed and any gaps are addressed Correct answer.
  3. To avoid contacting facility owners
  4. To increase the plan's page count

Explanation

Attaching locate documentation lets the planner verify that every listed facility has been located and that discrepancies or missing marks are resolved before digging. It does not remove the duty to contact owners.

Question 32Ground disturbance planning and hazard assessment

What is the main reason to define the exact boundaries of the ground disturbance area on a plan drawing?

  1. To shorten the project schedule
  2. To avoid paying permit fees
  3. To reduce the number of workers needed
  4. To limit the area requiring locate coverage and control Correct answer.

Explanation

Clearly bounded work areas define where locates, clearances, and controls apply, preventing unplanned disturbance outside the assessed zone. The other options are cost or schedule matters, not safety purposes.

Question 33Ground disturbance planning and hazard assessment

Which item belongs in the emergency response portion of a ground disturbance plan?

  1. The uniform supplier list
  2. The cafeteria menu rotation
  3. The assembly point and emergency contact numbers Correct answer.
  4. The company's holiday schedule

Explanation

Emergency response content must tell workers where to gather and whom to call if a line is struck or a release occurs. Menu, holiday, and supplier details are unrelated to emergency readiness.

Question 34Ground disturbance planning and hazard assessment

A planner is assessing a dig in an area with several older unknown services and no reliable records. Which approach best manages the resulting uncertainty?

  1. Rely on a single worker's memory of past digs
  2. Cancel all locates since records are missing
  3. Treat the area as high risk and require cautious methods such as hand exposure and increased monitoring Correct answer.
  4. Assume records are complete and proceed at full speed

Explanation

When records are unreliable, the precautionary approach is to raise the risk rating and apply more conservative excavation methods and oversight. Proceeding quickly, cancelling locates, or relying on memory increases the chance of a strike.

Question 35Ground disturbance planning and hazard assessment

How should a planner treat a proposed excavation that crosses a facility right-of-way boundary?

  1. Ignore the boundary since it is only a legal line
  2. Move the boundary to avoid paperwork
  3. Assume the owner will not notice
  4. Confirm crossing requirements with the facility owner and add them to the plan Correct answer.

Explanation

Crossing a right-of-way often triggers specific consent, notification, and clearance conditions set by the facility owner, which must be confirmed and built into the plan. Treating the boundary as irrelevant or avoidable is unsafe and non-compliant.

Question 36Ground disturbance planning and hazard assessment

Which factor should most influence the planned depth of trial pits or hand-exposed sections along a proposed trench?

  1. The density and criticality of facilities expected in each segment Correct answer.
  2. The colour of the locate paint
  3. The brand of the excavator
  4. The number of pages in the plan

Explanation

Where facilities are dense or critical, more frequent verification points reduce the chance of an undetected line being struck. Paint colour, document length, and equipment brand do not determine verification spacing.

Question 37Ground disturbance planning and hazard assessment

A planner learns that a nearby industrial site stores large volumes of flammable product. How should this affect the ground disturbance hazard assessment?

  1. It should be excluded because it is off the work site
  2. It should only be noted after work ends
  3. It should be ignored if the wind is calm
  4. It should be added as an ignition and emergency planning consideration Correct answer.

Explanation

Off-site flammable storage near excavation can turn a line strike into a fire or explosion, so ignition sources and emergency coordination must be assessed. Excluding it, delaying the note, or relying on calm wind ignores a serious escalation hazard.

Question 38Ground disturbance planning and hazard assessment

What is the best way to verify that a facility owner's locate marks are current for the planned work date?

  1. Assume marks never expire
  2. Ask a coworker who drove past the site
  3. Repaint the marks yourself in any colour
  4. Check the locate ticket validity period and request an update if expired Correct answer.

Explanation

Locate marks have a limited validity period, so the planner must confirm the ticket is still current and request a refresh if it has lapsed. Assuming permanence, repainting, or hearsay does not provide verified current information.

Question 39Ground disturbance planning and hazard assessment

During planning, a crew identifies a buried line whose owner cannot be determined. What is the most appropriate planning response?

  1. Treat it as live and require hand exposure and owner identification before machine work Correct answer.
  2. Cut it to identify the contents
  3. Proceed as if the line is abandoned
  4. Bury it deeper to avoid contact

Explanation

An unidentified line must be treated as live and potentially hazardous until its owner and contents are confirmed, with hand exposure used to investigate safely. Assuming abandonment, altering it, or cutting it creates serious risk.

Question 40Ground disturbance planning and hazard assessment

Which control best reflects the hierarchy of controls when a planned excavation must pass beneath an energized high-voltage duct bank?

  1. Posting a warning sign only
  2. Issuing gloves to the operator
  3. Adding the hazard to the tailgate talk only
  4. Eliminating the conflict by rerouting the excavation Correct answer.

Explanation

The hierarchy of controls ranks elimination highest, so rerouting the work to avoid the duct bank removes the hazard entirely. Signs, PPE, and briefings are lower-order controls that only mitigate residual risk.

Question 41Ground disturbance planning and hazard assessment

A planner is deciding how to sequence excavation near two parallel pipelines of different products. What should the sequence be based on?

  1. The relative hazard and required clearance of each product Correct answer.
  2. Which line was installed first
  3. Alphabetical order of the owners' names
  4. Which side the operator prefers to dig

Explanation

Sequencing should reflect the risk each line presents and the clearance rules that apply, so the most hazardous or tightly constrained section is handled with the greatest care. Installation date, name order, and operator preference are not safety criteria.

Question 42Ground disturbance planning and hazard assessment

What should the plan require if locate marks and the facility owner's records disagree on a line's position?

  1. Dig quickly before the discrepancy matters
  2. Trust whichever is more convenient
  3. Stop and resolve the discrepancy with the owner before digging Correct answer.
  4. Average the two positions

Explanation

Conflicting information means the true position is uncertain, so work should pause until the owner helps resolve it, often through hand exposure or additional locating. Convenience, averaging, or haste cannot substitute for verified position.

Question 43Ground disturbance planning and hazard assessment

Which planning element best supports rapid isolation of a gas line if it is damaged during excavation?

  1. A list of the crew's favourite tools
  2. A map of local restaurants
  3. The project's social media plan
  4. Pre-identified isolation points and owner emergency contacts Correct answer.

Explanation

Knowing where isolation valves are and whom to call lets responders stop the flow quickly, reducing the scale of an emergency. Tool lists, restaurant maps, and social media plans do not support isolation.

Question 44Ground disturbance planning and hazard assessment

A planner must assess a trench that will be deeper than the surrounding buried services. Which planning consideration is most important?

  1. The size of the site office
  2. The colour of the trench markers
  3. The number of visitors expected
  4. Whether the trench walls will expose or undermine nearby facilities Correct answer.

Explanation

Deeper excavation can expose, unsupported, or undermine adjacent buried facilities, so wall stability and support around those lines must be planned. Marker colour, visitor counts, and office size do not affect facility integrity.

Question 45Ground disturbance planning and hazard assessment

Why should the ground disturbance plan identify who has authority to stop work?

  1. To reduce the number of supervisors
  2. To speed up the permit process
  3. To avoid documenting hazards
  4. To ensure anyone can halt unsafe work without delay Correct answer.

Explanation

Clear stop-work authority lets workers act immediately when conditions change or a facility is at risk, without waiting for approval. It does not exist to cut supervision, speed permits, or reduce documentation.

Question 46Ground disturbance planning and hazard assessment

A planner is comparing two routes for a service trench. Route A avoids all known facilities; Route B passes within clearance of three lines. Which choice best applies risk elimination?

  1. Route A, because it removes facility contact hazards Correct answer.
  2. Route B, because it is shorter
  3. Route B, because more lines mean more locates
  4. Either route, since both are legal

Explanation

Choosing the route that avoids facilities entirely eliminates the contact hazard, which ranks above managing clearance on a busier route. Shorter distance, extra locates, or mere legality do not outweigh hazard elimination.

Question 47Ground disturbance planning and hazard assessment

A ground disturbance spans a site where previous excavations backfilled unknown material over a pipeline. How should the plan address the reduced reliability of depth information?

  1. Require conservative hand exposure and treat recorded depths as unverified Correct answer.
  2. Skip locates because the line was located before
  3. Increase machine digging speed to finish sooner
  4. Assume the pipeline is at its original design depth

Explanation

Backfill of unknown material means recorded depths may no longer match field conditions, so the plan should treat them as unverified and rely on cautious exposure methods. Assuming original depth, speeding up, or skipping locates ignores that uncertainty.

Question 48Ground disturbance planning and hazard assessment

Which combination best demonstrates a plan that integrates hazard assessment with field execution?

  1. A plan written after excavation is complete
  2. A plan filed in an office with no field copy
  3. A plan that lists only facility owners
  4. A plan with mapped hazards, assigned controls, and a field verification step before digging Correct answer.

Explanation

Effective plans link assessed hazards to specific controls and include a field check confirming those controls are in place before digging starts. Filing without field access, listing only owners, or writing after the fact breaks that link.

Question 49Ground disturbance planning and hazard assessment

A planner must decide whether a hazard assessment is adequate for a complex urban dig. Which test best indicates adequacy?

  1. The assessment uses the most expensive software
  2. The assessment was completed by one person alone
  3. Every credible hazard has a corresponding control and responsible person Correct answer.
  4. The assessment is shorter than one page

Explanation

Adequacy is judged by whether credible hazards are identified and matched to controls with clear accountability, not by length, software, or solo authorship. Coverage and ownership of controls are the meaningful criteria.

Question 50Ground disturbance planning and hazard assessment

When a ground disturbance plan is revised after new information emerges, what should happen to the superseded version?

  1. It should be left in the field as the active copy
  2. It should be retained with a clear record of the change and its reason Correct answer.
  3. It should be destroyed so no one sees it
  4. It should be merged silently with the new version

Explanation

Keeping superseded versions with change records preserves an audit trail showing what was known and why controls changed. Destroying, leaving outdated copies active, or silently merging loses that traceability and risks crews using stale information.