Determination of a Rate Based Emission Correlations


PTAC is seeking a proposal to execute a project that will determine emission rates (m3/day) that correspond to a range of concentrations, from 500ppm to 10,000ppm.


The fugitive emission requirements in Directive 060 include a concentration based leak repair threshold. There is significant development work going on for detection and quantification devices. Many of these quantification devices are focussing on rate based outputs. Development of emission rates that correlate to concentrations may lead to inclusion of a rate based repair threshold in the requirements that would encourage the use of quantification devices. This would lead to an improved understanding of fugitive emission volumes compared to the emission factors used now.

Project Scope

The scope of the project should focus on relevant data and sources that assist in the understanding of how rate based thresholds correspond to concentration based thresholds. The project should include correlations to ranges that are within reasonable effort and are practical outputs from current and emerging detection devices.


The project proposal should include a clear description on how each of the following deliverables will be completed:

  1. Current & Historical Data Review Interim Report – Review publicly available data sets or reports on rate based leak repair thresholds across various North American and European jurisdictions and the supporting information, where available, that contributed to demining those thresholds. Prepare an interim report that summarizes the work to date and the current status of rate based leak repair thresholds.
  2. Final Report – Prepare a report that summarizes emission rates in m3/day that correspond to a variety of different concentrations, ranging from 500ppm to 10,000ppm. The report should detail the methodology used to derive the corresponding values.

It is anticipated that there will be ongoing informal communication with the PTAC and the technical steering committee throughout the project. The proposal should include components for each stage with milestones, the project schedule, proposed costs and relevant expertise of the applicant’s proposed team.

Proposal Outline

The requested proposal should contain a very short description of the PTAC project and scope of work, CV or statement of qualifications and short excerpts of reports written by the applicant. The proposal document, which should be no more than 5 pages in length, addressing the following elements by the deadline stated below:

  • Scope of work
  • Deliverables
  • Budget and execution schedules
  • Personnel assigned to the project
  • Qualifications
  • Disclosure of co-funding agreements or partnerships
  • Requested payment schedule, if any.

Proposals should be submitted online using the following form: Application Form

RFP Schedule

April 14, 2021          RFP issued
May 16, 2021           Deadline for submission to PTAC
June 1, 2021            Proposal selected by ARPC

Selection Process

PTAC has formed a Steering Committee for this project composed of industry stakeholders with relevant expertise. PTAC will facilitate Steering Committee proceedings but will not be a decision-maker.

All submitted proposals will be provided to the Steering Committee for review. The Steering Committee will determine if proposals meet the requirements herein and provide an overall ranking based on Contractor qualifications and on proposal quality. The Steering Committee will make the final decision.

Once a selection of the best proposal according to the Steering Committee has been made, all submission contacts will be notified by email of the regarding the outcome of their individual proposal. The project final report will be shared on the PTAC website upon completion of the project.

Contact Information
Lorie Mayes
Tel.: 403-218-7707
Email: [email protected]

Tannis Such
Tel.: 403-218-7703
Email: [email protected]