SCAQMD Adopted Rule Changes

Jan 29, 2020 | Air Quality

For full details on the changes below, visit the SCAQMD’s Recent Actions webpage.

Rule 1110.2: Emissions from Gaseous and Liquid-Fueled Engines and Rule 1100: Implementation Schedule for NOx Facilities
On November 1, 2019, the South Coast Air Quality Management District (SCAQMD) Governing Board voted to amend Rule 1110.2 and Rule 1100. Rule 1110.2 contains oxides of nitrogen (NOx) limits for internal combustion engines greater than 50 horsepower (except engines used for self-propulsion), and Rule 1100 establishes the compliance schedule for Regional Clean Air Incentives Market (RECLAIM) facilities that will become subject to Amended Rule 1110.2.

Pursuant to Amended Rule 1100, engines at RECLAIM and former RECLAIM facilities must comply with Rule 1110.2 emission limits by December 31, 2023. Permit applications are due by July 1, 2021, for each stationary engine that does not meet the Rule 1110.2 emission limits. Amended Rule 1110.2 primarily updates the NOx emission standards to be applicable to RECLAIM facilities; the existing emission limits for most engines will remain the same. The amended rule provides additional averaging options to demonstrate compliance with the emission limits and includes updates to monitoring, recordkeeping, and reporting requirements.

Most of the current RECLAIM engines that do not meet the Rule 1110.2 emission limits will require the installation of new selective catalytic reduction (SCR) controls or retrofit of existing SCR equipment to comply with the amended rule. The SCAQMD initially proposed to include an ammonia limit for add-on air pollution control equipment (i.e., SCR) in Amended Rule 1110.2; however, this ammonia limit requirement was removed in the final rule. Ammonia limits for new engines are to be based on Best Available Control Technology (BACT) on a case-by-case basis during permitting. Emergency engines that operate less than 200 hours per year continue to be exempt.

Rule 1480: Ambient Monitoring and Sampling of Metal Toxic Air Contaminants
Proposed Rule 1480 was adopted by the Governing Board on December 6, 2019. This new rule is a monitoring and sampling rule for metal toxic air contaminants (TACs), with the main purpose of transferring the responsibility of conducting ambient air monitoring from the South Coast Air Quality Management District (SCAQMD) to facilities that meet certain criteria and are subsequently designated as Rule 1480 Metal TAC Monitoring Facilities. Specifically, the monitoring and sampling requirements of Rule 1480 apply to facilities that are Potentially High Risk Level Facilities under Rule 1402, where Significant Risk Levels have been exceeded for any sensitive receptors. Thus, this rule is intended to complement Rule 1402 for High Risk Level Facilities by requiring monitoring and sampling while the facility conducts an HRA and implements a Risk Reduction Plan.

Under Rule 1480, any facility that receives an Initial Notice from the SCAQMD may be required to provide data when the District is conducting monitoring and sampling in communities surrounding a facility, in order for the SCAQMD to determine if the facility can be designated as a Metal TAC Monitoring Facility. For instance, if the District detects elevated levels of toxics in a community from existing monitoring programs (such as from AB 617 Community Air Monitoring or public complaints), the surrounding facilities in that community may be investigated, and information requests may be sent by the SCAQMD to facilities to submit data. The SCAQMD may then designate a facility as a Metal TAC Monitoring Facility that will be required to prepare and submit a Monitoring and Sampling Plan. The facility must then conduct, or pay the District to conduct, the ambient air monitoring and sampling.

The costs of implementing the monitoring required by Rule 1480 can be significant. Small facilities with annual revenues less than $3 million and less than 25 employees are exempt from the monitoring and sampling requirements.

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