California Code of Regulations
Title 17 - Public Health
Division 3 - Air Resources
Chapter 1 - Air Resources Board
Subchapter 7.7 - Regulation for the Reporting of Criteria Air Pollutants and Toxic Air Contaminants
Article 2 - Requirements for Calculating and Reporting Criteria Pollutant and Toxic Air Contaminant Emissions
Appendix B - to the Regulation for the Reporting of Criteria Air Pollutants and Toxic Air Contaminants

Current through Register 2024 Notice Reg. No. 38, September 20, 2024

Additional Substances Subject to Quantification and Reporting

Reporting Schedule for Substances Listed in Table B-2, Table B-3, and Table B-4

The substances listed in Table B-2, Table B-3, and Table B-4 must be reported in addition to those substances identified in Appendix A-I of the Emission Inventory Criteria and Guidelines for the Air Toxics "Hot Spots" Program, version effective September 26, 2007, as issued by CARB.

Emissions of substances listed in Table B-2, Table B-3, and Table B-4 must initially be reported no later than the initial quantification year shown below in Table B-1, and then for any subsequent year in which emissions reports are required. For example, in Table B-1, the year 2022 is listed for District Group A and Table B-2, therefore the Table B-2 substances must be reported during 2023 based on 2022 emissions data. District Groups are as described in Appendix A, Table A-2, shown previously.

Table B-1.

Initial Emission Data Quantification Year for Additional Substances in Tables B-2, B-3, and B-4

* Reporting of substances in Tables B-2, B-3, and B-4 are in addition to those substances identified in Appendix A-I of the Emission Inventory Criteria and Guidelines for the Air Toxics "Hot Spots" Program, version effective September 26, 2007, as issued by CARB. Reporting for the "Hot Spots" Appendix A-I substances must begin with the first year in which a facility becomes subject to reporting, and be included for any future required report.

** Any Sector Phase 3B sectors identified in Table A-3 and sources subject to applicability under 93401(a)(4)(A) or (B) must begin ongoing annual emissions reporting of toxics identified in Tables B-2 and B-3 no later than 2028 data reported in 2029. Reporting of the specified toxics for these facilities is not required to begin earlier than 2028 data even if other permitted processes in Sector Phases 1, 2, or 3 listed in Table A-3 are present at the facility.

*** Table B-4 substances apply to wastewater treatment facilities, as identified in Sector Phase 3B, Sector 52, of Table A-3. These sources must begin ongoing annual emissions reporting of the toxics identified in Table B-4 no later than 2028 data reported in 2029.

* Reporting of substances in Tables B-2, B-3, and B-4 are in addition to those substances identified in Appendix A-I of the Emission Inventory Criteria and Guidelines for the Air Toxics "Hot Spots" Program, version effective September 26, 2007, as issued by CARB. Reporting for the "Hot Spots" Appendix A-I substances must begin with the first year in which a facility becomes subject to reporting, and be included for any future required report.

* Reporting of substances in Tables B-2, B-3, and B-4 are in addition to those substances identified in Appendix A-I of the Emission Inventory Criteria and Guidelines for the Air Toxics "Hot Spots" Program, version effective September 26, 2007, as issued by CARB. Reporting for the "Hot Spots" Appendix A-I substances must begin with the first year in which a facility becomes subject to reporting, and be included for any future required report.

* Reporting of substances in Tables B-2, B-3, and B-4 are in addition to those substances identified in Appendix A-I of the Emission Inventory Criteria and Guidelines for the Air Toxics "Hot Spots" Program, version effective September 26, 2007, as issued by CARB. Reporting for the "Hot Spots" Appendix A-I substances must begin with the first year in which a facility becomes subject to reporting, and be included for any future required report.

NOTES for Tables B-2, B-3, and B-4:

[1] Emittent ID (the emittent identification number) is the Chemical Abstract Service (CAS) number where available, or a CARB-assigned 4-digit emittent ID code.

A double dash ("- -") is shown for the Emittent ID to indicate that the entry is a non-reportable group header for the substances immediately following it.

[2] Individual substances listed under a group heading must be reported individually. Other, unspecified substances in the group must be summed and reported using the emittent ID of the group heading.

The square bracket designation, "[]", indicates that the substance is a component of the chemical group heading(s) within the brackets.

The braces designation, "{ }", indicates a synonym for the substance listed.

[3] Applicable degree of accuracy (in lbs/year except where noted). Radionuclides must be reported in Curie units, and the accuracy must be considered accordingly

Emission Quantification and Degree of Accuracy:

a. Following the phase-in schedule provided in Table A-1 of this article, emissions reports shall include emission estimates, in accordance with the instructions that follow, for any substances released to the atmosphere that are listed in Table B-1 of Appendix B of this article.

b. For each substance listed in Table B-1, the total facility emissions from processes shall be reported to within plus or minus 10 percent of the total emissions of the substance, or to within plus or minus the applicable degree of accuracy value in Table B-1 for that substance, whichever is greater, in accordance with the instructions in which follow pertaining to "Using Degree of Accuracy Values in Reporting Facility Emissions."

The degree of accuracy values shall be applied on a facility-wide basis, not at the level of each process. For reporting, the total facility emissions of substances shall be rounded to the nearest unit of the applicable degree of accuracy to determine whether they must be reported. If facility emissions of a substance exceed one-half of the applicable degree of accuracy unit for the substance, the substance emissions shall be reported.

Using Degree of Accuracy Values in Reporting Facility Emissions:

The general use of the degree of accuracy values is described above. The actual degree of accuracy values for each substance are listed in Appendix B, Table B-1. This text specifically describes how to apply the degree of accuracy values when reporting facility emissions.

Note that degree of accuracy values are to be applied on a facility-wide basis, and not at the process level. For reporting, the total facility emissions of substances should be rounded to the nearest unit of the applicable degree of accuracy to determine if they must be reported. In other words, if facility emissions of a substance exceed one-half of the applicable degree of accuracy unit for the substance, then the substance emissions shall be reported. For example, assume that the total emissions of benzene from a facility are 1.7 lbs/year. The degree of accuracy value for benzene is 2 lbs/yr. Because the facility emissions exceed one-half of the benzene degree of accuracy, the emissions must be reported for any devices emitting benzene. If the total facility benzene emissions were 0.9 lbs/yr, the emissions (to the nearest unit of two pounds) would round down to zero and would not need to be reported.

[4] Emissions of unspecified metal compounds shall be reported as the amount of the metal atom equivalent, using the metal emittent identification number for the metal itself; (or using the emittent identification number indicated on the table, such as for reporting inorganic versus other-than-inorganic arsenic compounds), or for reporting soluble versus insoluble cobalt compounds.

For unspecified metal compounds which contain two or more listed metals (e.g., zinc chromate), each component metal shall be reported as the amount of the appropriate metal atom equivalent (i.e., the zinc portion of the weight as zinc equivalent and the chromate portion as hexavalent chromium equivalent.

For specific, individually listed metal compounds (e.g., Lead chromate or Cobalt oxalate), emissions shall be reported for the compound (as pounds of whole compound), using the emittent identification number for that compound.

The rare earth elements and their compounds shall be treated in the same way.

[5] For facilities that are subject to Hot Spots applicability provisions, for pesticide-related substances, reporting is required except during the time it is acting as a pesticide at an operation which is not a facility subject to the Hot Spots program (e.g. during typical field application).

[6] Additional Organophosphate Flame Retardants (OPFRs) are listed under the category "Brominated and Chlorinated Organics Compounds used as Flame Retardants."

[7] When multiple CAS appear to be used for the same chemical, we have included these CAS on the list.

[8] The facility operator shall report the CAS number and complete chemical name for any substance meeting the definition of this functional group class.

[9] Compounds of the form "X-CN", where formal dissociation can occur. Report as the amount of Cyanide equivalent in the compound using an emittent identification code of 1073.

[10] PAH: (Polycyclic Aromatic Hydrocarbon) - An organic compound consisting of a fused ring structure containing at least two (2) benzene rings, and which may also contain additional fused rings not restricted exclusively to hexagonal rings. The structure does not include any heteroatoms or substituent groups. The structure includes only carbon and hydrogen. PAHs are a subgroup of POM and have a boiling point of greater than or equal to 100 C. Reporting of individual PAHs is required. [11] The emittent identification number 1105 has been discontinued for all facilities reporting for the first time and for all updates. Use the listed replacement emittent identification codes 1103 and 1104.

1. New Appendix B filed 10-28-2021; operative 1-1-2022 (Register 2021, No. 44). Filing deadline specified in Government Code section 11349.3(a) extended 60 calendar days pursuant to Executive Order N-40-20.