Proposed Amended Rule 1178 – Further Reductions of VOC Emissions from Storage Tanks at Petroleum Facilities


SCH Number
Public Agency
South Coast Air Quality Management District
Document Title
Proposed Amended Rule 1178 – Further Reductions of VOC Emissions from Storage Tanks at Petroleum Facilities
Document Type
NOE - Notice of Exemption

Document Description
South Coast AQMD is proposing amendments to Rule 1178 which would: 1) allow an operator to accept a permit condition to limit the true vapor pressure of organic liquid contained in wastewater stored in an external floating roof tank to three pounds per square inch absolute (psia), in lieu of doming the tank, to prevent creating a safety hazard due to the accumulation of pyrophoric material that could otherwise occur if the tank were domed; and 2) allow the Executive Officer to retain the ability to review and confirm an operator’s claim of a safety hazard due to the accumulation of pyrophoric material. Proposed Amended Rule 1178 is estimated to result in approximately 2.4 pounds per day of foregone VOC emission reductions, which is less than the South Coast AQMD air quality significance threshold of 55 pounds per day (mass daily threshold for operation).

Contact Information
Kevin Ni
South Coast AQMD
Lead/Public Agency
21865 Copley Dr
Diamond Bar, CA 91765

Phone : (909) 396-2462

South Coast AQMD
Project Applicant


Los Angeles Orange Riverside San Bernardino
Other Location Info
The project is located in the South Coast Air Quality Management District (South Coast AQMD) jurisdiction, which includes the four-county South Coast Air Basin (all of Orange County and the non-desert portions of Los Angeles, Riverside and San Bernardino counties), and the Riverside County portion of the Salton Sea Air Basin (SSAB) and the non Palo Verde, Riverside County portion of the Mojave Desert Air Basin (MDAB).

Notice of Exemption

Exempt Status
Type, Section or Code
Reasons for Exemption
Pursuant to the California Environmental Quality Act (CEQA), South Coast AQMD, as Lead Agency, has reviewed Proposed Amended Rule 1178 pursuant to: 1) CEQA Guidelines Section 15002(k) – General Concepts, the three-step process for deciding which document to prepare for a project subject to CEQA; and 2) CEQA Guidelines Section 15061 – Review for Exemption, procedures for determining if a project is exempt from CEQA. Since the proposed project would result in minimal foregone VOC emission reductions, it can be seen with certainty that there is no possibility that the proposed project may have a significant adverse effect on the environment. Therefore, the proposed project is exempt from CEQA pursuant to CEQA Guidelines Section 15061(b)(3) – Common Sense Exemption.


Notice of Exemption
PAR 1178-NOE   PDF 78 K

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