Deduction overview

Recordable incidents, Spills, and Well Control Events are assessed and impact performance scoring. The severity of the incident designates point amortization. Not all deductions are amortizable. 

Recordable Incidents


Point amortization begins on the date issued on the assessment, not on the date of the incident. Eligible incidents will amortize at a rate of 3% per year.

Percent Deduction Years to Amortize
3% 1 Year
10% 3 Years
17% Ineligible for Amortization

Deduction Criteria

Score reductions and criteria are outlined below, utilizing classifications developed by the US Occupational Safety and Health Administration (OSHA). Amortizable incidents are indicated below and outlined in the following table.

Deduction (%) Classification
Amortizable No Point Reduction First Aid: an incident requiring medical attention, which can be administered onsite or at the location of the incident. Examples include cleaning/bandaging minor cuts, drinking fluids to reduce heat stress, etc.
3% Medical Aid: a work-related incident requiring medical treatment; for example, the use of prescription medication, the necessity of wound closing devices, etc.
10% Restricted Work: a work-related injury or illness that results in a physician recommending a job restriction or preventing an employee from performing one or more of the routine functions of his or her job, or from working the full workday.
10% A Lost Time Incident (LTI) resulting in temporary partial disability and/or hospitalization for one day or less. Examples include smashed fingers, broken bones, etc.
Non-Amortizable 17% or Permanent Rating Deduction to Silver A Lost Time Incident (LTI) resulting in permanent partial disability and/or requiring consecutive days of hospitalization. Examples include small amputation, hearing loss, partial loss of vision, etc.
A Lost Time Incident (LTI) resulting in permanent total disability or fatality. Examples include large amputation, full loss of vision, paralysis, or death.

Reportable Spills


Point amortization begins the first year of assessment after the state or regulatory agency deems the spill remediated. If the spill is deemed remediated within the assessment year, the full year of amortization will be counted during reassessment.

Classification Percent Deduction Years to Amortize
< 1bbl Spill Outside of Containment 3% 1 Year
> 1bbl Spill Outside of Containment 10% 3 Years
On-site Hazardous Spill Outside of Containment 17% 3 Years
Off-site Non-Hazardous Spill 17% 3 Years
Spill that has entered an Off-site Body of Water 17% Ineligible for Amortization
Off-site Hazardous Spill 17% Ineligible for Amortization

Deduction Criteria

Spill deductions based on reportable spills are outlined below. Deductions are only applicable for spills deemed reportable by the regulatory agency having jurisdiction. Deductions eligible for amortization begin once the regulatory agency deems the spill remediated, not on the date of the spill.


Deduction Graphic (1)

Well Control


Point deductions associated with well control events are not eligible for amortization.

Deduction Criteria

TrustWell defines a well control event as an incident in which the Emergency Action Plan was enacted, with a prolonged period where control of the well was not maintained. This encompasses events such as uncontrolled blowouts, significant air releases, fires, etc.

Classification Percent Deduction Years to Amortize
Loss of Well Control 17% Ineligible for Amortization

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