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Learn about the Air District's proposed amendments and additions to Regulation 6, which governs particulate matter emissions from various commercial and industrial operations.
The Air District is proposing amendments and additions to Regulation 6, which governs particulate matter emissions from various commercial and industrial operations. The Air District estimates that several hundred facilities may be subject to these proposed rules.
The amendments and additions involve the following rules:
The current Regulation 6, Rule 1 was most recently amended in December 2007. Draft amendments to Rule 6-1 bring it up to date with California’s strictest particulate matter requirements.
The new draft rules will address particulate matter emissions from dirt and other solid materials that are tracked out onto roadways, from roofing asphalt, and from storage and handling of bulk materials. The Air District has also drafted a new umbrella regulation for all particulate matter rules to provide a consistent set of general provisions, definitions, and test methods.
The proposed rules, amendments, staff report, and other materials are available on the Regulatory Workshops page.
These amendments clarify exemptions for particulates from operations covered by other existing Air District rules, and for sugar and salt manufacturing. They update particulate emissions limits from general sources to reflect the most stringent levels achievable. They clarify testing requirements to determine compliance, and specify source testing requirements. Visible emissions limits remain unchanged.
The draft regulation provides consistent definitions and test methods across all particulate matter rules.
This draft regulation applies to large bulk material and construction sites, and disturbed surfaces greater than one acre. It prohibits significant trackout of dirt and other solids onto adjacent roadways, and prohibits significant visible emissions from vehicle traffic over trackout. No trackout can remain at the end of each workday, and cleanup of trackout must meet significant visible emissions limits. The regulation also requires trackout and visible emissions to be monitored every four hours.
This draft regulation requires low-fuming roofing asphalt, effective January 1, 2018.
The draft regulation applies to bulk material sites with an Air District permit that produce, handle or use more than 10 tons per year of material, or store material more than 3 feet high. It prohibits significant visible emissions, requires prevention and cleanup of material spills, and limits vehicle traffic in order to control dust. It also requires trackout and visible emissions to be monitored every four hours.
A series of open houses/workshops are also being held from January 30 through February 8 in San Mateo, San Francisco, Marin, Napa, Contra Costa, Alameda, and Santa Clara counties.
These open houses coincide with displays and presentations on the Air District’s 2017 Clean Air Plan – Spare the Air, Cool the Climate, A Blueprint for Clean Air and Climate Protection.
At the open houses, you can hear about the proposed rules, review material, speak with Air District staff, ask questions, and offer comments.
Dates and locations are below:
Monday, January 30
Quinlan Community Center
10185 N Stelling Rd
Tuesday, January 31
Bay Area Metro Center
375 Beale Street
Wednesday, February 1
5:00 - 7:00 PM
Albert J. Boro Community Center
50 Canal St.
Thursday, February 2
Yountville Community Center, Heritage Room
6516 Washington St.
Monday, February 6
Walnut Creek Marriott
2355 North Main St.
Monday, February 6
Holiday Inn Dublin
6680 Regional St.
Tuesday, February 7
4:00 - 6:00 PM
Dr. Martin Luther King Jr. Library - Room 225
150 East San Fernando St.
Wednesday, February 8
Cal State East Bay Oakland Center
1000 Broadway #109
The Air District is soliciting your comments on the proposed amendments and additions to Regulation 6.
To submit public comment electronically, contact Guy A. Gimlen, Principal Air Quality Engineer, at
Please submit your comments by Friday, March 3, 2017.
The Air District anticipates releasing proposed rule language, a staff report, a socioeconomic analysis, and the CEQA Environmental Impact Report in Spring 2017. The agency anticipates that a proposed final draft will be presented to the Air District's Board of Directors for approval in Summer 2017.
Senior Air Quality Engineer, Technical Services
Air Quality Program Manager, Technical Services
No Spare the Air Alert in Effect
Air Quality Widgets
Last Updated: 1/19/2017