Mandatory GHG Reporting - Asset Controlling Supplier
This page updated January 24, 2013
Asset Controlling Suppliers - System Emission Factors
Pursuant to section 95111(b)(3) of the Regulation for the Mandatory Reporting of Greenhouse Gas Emissions (title 17, California Code of Regulations, section 95100 et seq.), ARB publishes emission factors for all recognized and approved asset-controlling suppliers (ACS) to provide electricity purchasing and selling entities information about potential greenhouse gas emission compliance obligations associated with electricity from these sources.
For data year 2012, Bonneville Power Administration (BPA) was the
only ACS recognized by ARB. BPA is a federal agency which markets
electric power from all of the federally owned hydroelectric projects
in the Pacific Northwest. Section 95111(b)(3) of the MRR
specifies that the ACS system emission factor assigned to BPA, which is
to be used for emissions data collected in data year 2012 and reported
to ARB in 2013, is 20 percent of the default emission factor for
unspecified sources. This ACS system emission factor is shown in
Asset-Controlling Supplier System Emission Factor
for Data Year 2012 (Reported in 2013)
Power Administration (BPA)
ARB ID #4000
|0.0856 MT CO2e per MWh|
For data year 2013, ARB has recognized and approved two asset-controlling suppliers based on reports submitted and verified pursuant to section 95111(f) of the MRR: BPA and Powerex. Powerex is the wholly-owned electricity marketing subsidiary of BC Hydro – Canada’s third largest electric utility – responsible for marketing BC Hydro’s surplus electricity in the western United States.
The ACS system emission factors applicable to data year 2013, reported in 2014, are listed in Table 2.
Power Administration (BPA)
0.0249 MT CO2e per MWh
0.0293 MT CO2e per MWh
Use of Asset-Controlling Supplier System Emission Factors
Electric power entities (EPE) reporting 2012 data to ARB in 2013, and future data in future years, may claim power from an asset-controlling supplier (ACS) only when a power contract for a specified source is in place for those purchases.
When reporting imported electricity supplied by asset-controlling suppliers under section 95111(a)(5), EPEs must utilize a specified power contract in order to claim ACS power. However, EPEs need not contract directly with an ACS in order to claim ACS power so long as the original buyer and any subsequent buyers and sellers shown in the NERC e-tag market path utilize a specified power contract to convey the right to receive ACS power.
As amended by the Board in 2012, the definition of “power contract” in section 95102(a) states that a “power contract for a specified source is a contract that is contingent upon delivery of power from a particular facility, unit, or asset-controlling supplier’s system that is designated at the time the transaction is executed.” Acceptable forms of a specified contract may include, but are not limited to, modified versions of either the Western Systems Power Pool (WSPP) Agreement Schedule B (Unit Commitment Service) or Schedule C (Firm Capacity/Energy Sale or Exchange Service) that specify the power is from the ACS system. Other contract forms that specify the source (e.g., a particular facility, unit, or ACS system) at the time of entry into the contract are also acceptable. Unacceptable forms of contract include contracts for a source of electricity that is not a specified source at the time of entry into the transaction to procure the electricity.
NOTE: ARB is working on additional guidance for asset controlling suppliers concerning the reporting and verification requirements.
For technical questions about the calculation of the ACS system emission factors, please contact Wade McCartney at email@example.com or (916) 327-0822. For general reporting questions, please contact David Edwards at firstname.lastname@example.org or (916) 323-4887.
Electric Power Entities may register as an Asset Controlling Supplier pursuant to §95102(a)(17) and §95111(b)(3). Applicants may download and complete the Asset Controlling Supplier application form here:
- Asset Controlling Supplier Application Form (docx, Word 2010)
- Asset Controlling Supplier Application Form (doc, Word 2007)
ARB has posted an Asset Controlling Supplier (ACS) System Emission Factor Calculation workbook in Excel. This workbook will facilitate entity compliance with the system emission factor calculation in Section 95111(b)(4) and 95111(b)(3).For entities wishing to be considered an Asset Controlling Supplier for reporting 2014 emissions, please submit your application by May 1st. The submission by this date is needed to ensure sufficient time to process and review the application for the upcoming reporting year. Once the application is completed, please submit the form and attachments.