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Mandatory GHG Reporting - Asset Controlling Supplier

This page updated December 11, 2015

Background

An asset-controlling supplier (ACS) is a specific type of electric power entity (EPE) approved and registered by ARB under the Regulation for the Mandatory Reporting of Greenhouse Gas Emissions (MRR).  An ACS owns or operates interconnected electricity generating facilities or serves as an exclusive marketer for these facilities even though it does not own them.  Each ACS must be approved by ARB and is assigned a system emission factor for the wholesale electricity procured from its system and imported into California.  Once approved by ARB, ACS specified source power must be reported using ARB approved emission factors.

ACS System Emission Factors

For each reporting year ARB publishes emission factors for all approved asset-controlling suppliers pursuant to section
95111(b)(3).  These emission factors provide electricity purchasing and selling entities information regarding the carbon intensity of power sourced from ACS systems for MRR reporting purposes.  These emission factors must be used to report specified source electricity from ACS systems under MRR.

EPEs may only claim power from an ACS when the specified source requirements in MRR have been met.  Specifically, in order to claim specified source ACS power, the EPE must have a specified source power contract, comply with seller warranty provisions in section 95111(a)(4), and meet all other applicable requirements.  More information on the requirements for claiming specified source and ACS power can be found in the ARB Specified Source Electrical Imports Greenhouse Gas Reporting Frequently Asked Questions document.

Data Year 2016 - ACS Emission Factors

For 2016 data reported in 2017, ARB has approved three asset-controlling suppliers:  Bonneville Power Administration (BPA), Powerex, and Tacoma Power.  ARB approval was based on reports submitted by the applicants and independently verified pursuant to section 95111(f) of MRR.  The 2016 assigned emission factors for the approved ACSs are provided below:

Asset-Controlling Supplier System Emission Factors
for Data Year 2016 (Reported in 2017)

Date Posted: December 11, 2015
Bonneville Power Administration (BPA)
ARB ID #4000
0.0195 MT CO2e per MWh
Powerex
ARB ID #3101
0.0469 MT CO2e per MWh
Tacoma Power
ARB ID #104567
0.0329 MT CO2e per MWh

Data Year 2015 - ACS Emission Factors

For 2015 data reported in 2016, ARB approved two asset-controlling suppliers: Bonneville Power Administration (BPA) and Powerex.  ARB approval was based on reports submitted by the applicants and independently verified pursuant to section
95111(f) of MRR.  The 2015 assigned emission factors for the approved ACSs are provided below:

Asset-Controlling Supplier System Emission Factors
for Data Year 2015 (Reported in 2016)
Date Posted: December 23, 2014
Bonneville Power Administration (BPA)
ARB ID #4000
0.0221 MT CO2e per MWh
Powerex
ARB ID #3101
0.0355 MT CO2e per MWh

Archive – ACS Emission Factors for Data Years 2012-2014

The table below shows the ACS emission factors assigned by ARB in previous data years 2012-2014.

 

Asset-Controlling Supplier System Emission Factors
for Data Years 2012-2014
Data Year
Asset Controlling Supplier
ARB-Assigned Emission
Factor (MTCO2e per MWh)
Date Posted
2014
(Reported in 2015)
Bonneville Power Administration (BPA)
ARB ID #4000
0.0192 MT CO2e per MWh 12/18/2013
2014
(Reported in 2015)
Powerex
ARB ID #4000
0.0216 MT CO2e per MWh 12/18/2013
2013
(Reported in 2014)
Bonneville Power Administration (BPA)
ARB ID #4000
0.0249 MT CO2e per MWh 12/20/2012
2013
(Reported in 2014)
Powerex
ARB ID #3101
0.0293 MT CO2e per MWh 12/20/2012
2012
(Reported in 2013)
Bonneville Power Administration (BPA)
ARB ID #4000
0.0856 MT CO2e per MWh 1/1/2012

Asset Controlling Supplier Registration

Pursuant to section 95111(f) of MRR, electric power entities (EPE) may register with ARB as an Asset Controlling Supplier (ACS).  For entities applying to be an ACS, please submit your application to ARB by May 1st of the year proceeding the data year for which the entity intends to be an ACS.  Submission by this date is needed to ensure sufficient time to process and review the application for the upcoming reporting year.  Applicants may download and complete the ACS application form here:


For questions, please contact Wade McCartney, 916.327.0822


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