Definitions

GHG Scope 1

Direct emissions from operations that are owned or controlled by the organizat

GHG Scope 2

Energy indirect emissions resulting from the generation of purchased or acquired electricity, heating, cooling or steam

GHG Scope 3

Other indirect emissions that occur outside the organization, including both Upstream and Downstream emissions

Tier 1 Process Safety Event (PSE)

is a loss of primary containment (LOPC) with the greatest consequence. A Tier 1 PSE is an unplanned or uncontrolled release of any material, including non-toxic and non-flammable materials (e.g.: steam, hot condensate, nitrogen, compressed CO2 or compressed air), from a process that results in one or more of the consequences listed below:

  • An employee, contractor or subcontractor days away from work injury and/or fatality;
  • A hospital admission and/or fatality of a third-party
  • An officially declared community evacuation or community shelter-in-place
  • A fire or explosion resulting in a greater than or equal to 25,000 $ of direct cost to the Company
  • A pressure relief device (PRD) discharge to atmosphere whether directly or via a downstream destructive device that results in one or more of the following four consequences:
    • Liquid carryover
    • Discharge to a potentially unsafe location
    • An onsite shelter-in-place
    • Public protective measures (e.g. road closure) and a PRD discharge quantity greater than the established threshold quantities in any one hour
  • A release of material greater than the established threshold quantities in any one hour.

Tier 2 Process Safety Event (PSE)

is a loss of primary containment (LOPC) with lesser consequence. A Tier 2 PSE is an unplanned or uncontrolled release of any material, including non-toxic and non-flammable materials (e.g.: steam, hot condensate, nitrogen, compressed CO2 or compressed air), from a process that results in one or more of the consequences listed below and is not reported in Tier 1:

  • An employee, contractor or subcontractor recordable injury;
  • A fire or explosion resulting in a greater than or equal to 2,500 $ of direct cost to the Company
  • A pressure relief device (PRD) discharge to atmosphere whether directly or via a downstream destructive device that results in one or more of the following four consequences:
    • Liquid carryover
    • Discharge to a potentially unsafe ­location
    • An onsite shelter-in-place
    • Public protective measures (eg.: road closure) and a PRD discharge quantity greater than the established threshold quantities in any one hour
  • A release of material greater than the established threshold quantities in any one hour.

Tier 3 Process Safety Event (PSE)

indicator records an operational situation, typically considered a“near miss” which has challenged the safety system by progressing through one or more barrier weaknesses to result in an event or condition with:

  • Consequence that do not meet the criteria for a reportable Tier 1 or Tier 2 event; or
  • No actual consequences, but the recognition that in other circumstances further barriers could have been breached and a Tier 1 or Tier 2 event could have happened.

Lost-time injuries

are any occupational injuries resulting in fatalities, permanent total disabilities and lost workday cases, but excluding restricted work cases and medical treatment cases.

Total recordable injuries

are any injuries resulting in fatalities, permanent total disabilities, lost workday cases, restricted work cases and medical treatment cases.

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