Through the planning,
environmental and entitlement processes, a lead agency may adopt mitigation measures or conditions of approval to reduce a project’s air emissions. Specific guidance on construction and operational mitigation is provided on this page. Consult the Sac Metro Air District Guide to Air Quality Assessment in Sacramento County for more details.
All construction projects should include Basic Construction Emission Control Practices (Best Management Practices).
Additionally, projects with construction mitigation requirements must reduce emissions from off-road equipment. Some projects may be required to reduce emissions from on-road haul trucks and pay a mitigation fee.
Enhanced Exhaust Control Practices (version prior to April 2019) are the standard off-road equipment mitigation recommend by the Sac Metro Air District for on-site emissions. When on-site mitigation does not reduce emissions below the Sac Metro Air District thresholds a mitigation fee may be included.
NOTE: After April 2019, construction companies may begin seeing the newer version of the Enhanced Exhaust Control Practices (April 2019) included in the requirements for some projects.
Input project and equipment fleet information in the Construction Mitigation Tool (May 2018). This is a .zip file. Please save it and then open it to extract the .xlsm file.
All owned, rental and subcontractor equipment should be included. The Tool will calculate emissions and provide the information to determine compliance.
Input haul truck information, if applicable to the project, in the Construction Mitigation Tool spreadsheet, section B of the Input_Data tab.
Keep copies of the completed Construction Mitigation Tool spreadsheet for your records.
Submit the completed Construction Mitigation Tool spreadsheet via email to Sac Metro Air District staff Karen Huss and Rachel DuBose (email@example.com and firstname.lastname@example.org) at least 4 business days prior to work beginning.
Please provide the project name in the email subject line.
Sac Metro Air District staff evaluate the submittal and provide a confirmation letter to the contractor and lead agency when compliance with the mitigation is determined. The confirmation letter allows work to proceed.
For projects required to mitigate on-road haul truck emissions, use section B of the Input_Data tab of the Construction Mitigation Tool spreadsheet. The Tool estimates on-road haul truck emissions. See steps 2 and 4 above for submitting on-road haul truck information.
When a project cannot fully mitigate construction emissions by implementing off-road and on-road measures, a fee may be assessed to acheive the remaining mitigation. Fees are adopted by the lead agency.
Currently the mitigation fee rate is $30,000 per ton of emissions (set July 2017, no change in 2018 or 2019). Each July the rate is reviewed and adjusted if needed. A 5% administrative fee is assessed in addition to the mitigation fee.
Projects that exceed the Sac Metro Air District operational emissions thresholds must mitigate the impacts using all feasible measures. Sac Metro Air District staff recommends an operational Air Quality Mitigation Plan (AQMP) be developed, which describes how emissions from the project will be reduced. The level of reductions needed for a project is determined in consultation with the lead agency and Sac Metro Air District staff.
Lead agencies also require mitigaton for project greenhouse gas emissions (GHG) that are determined to be significant. Ideally a project will implement measures from the lead agency's Climate Action Plan (CAP) or Greenhouse Gas Reduction Plan (GHGRP) to mitigate GHG. If no CAP or GHGRP exists, the lead agency may require a project specific GHGRP.
The Recommended Guidance for Land Use Emission Reductions (Guidance) provides a description of the most current feasible mitigation measures and corresponding emission reduction potential. Project proponents should use the Guidance along with the California Emissions Estimator Model (CalEEMod) to create AQMPs and GHGRPs.
In general, the Guidance in effect at the time the Notice of Preparation was issued for a project should be used. All versions of the Guidance are included in the table below.
Starting January 1, 2018, Sac Metro Air District staff recommend using Version 4.0 of the Guidance.
When proponents use Guidance earlier than version 3.0, the associated Guidance for GHG Reduction document may also be used.
In some circumstances, additional mitigation measures may be necessary and can be developed using the California Air Pollution Control Officers Association's Quantifying Greenhouse Gas Mitigation Measures, A Resource for Local Government to Assess Emission Reductions from Greenhouse Gas Mitigation.
Sac Metro Air District staff is committed to working with project proponents and lead agencies to develop AQMPs and GHGRPs. Lead agencies typically require plans to be reviewed and adequacy confirmed by the Sac Metro Air District prior to project approval. To facilitate this, project proponents should submit draft plans for review early in the development process.
The Sac Metro Air District requests input on a draft AQMP/GHGRP form that would
simplify the creation and review of operational AQMPs and GHGRPs.
The form requires the input of information on topics such as: existing land use
designations, public facilities and urban services financing plans, vehicle miles traveled (VMT)
assumptions, energy standards assumptions, and mitigation measure enforcement
In the future, Sac Metro Air District anticipates project proponents and consultants will submit this form in lieu of
or to summarize a project’s AQMP and GHGRP. The form will reduce local
jurisdiction review time by ensuring all the necessary information is
Please provide comments by February 28, 2020, to Rachel DuBose at email@example.com.
Recommended Guidance for Land Use Emission Reductions
October 1, 2016 to December 31, 2017
April 1, 2015 to September 30, 2016
June 1, 2014 to March 31, 2015
July 1, 2013 to May 31, 2014
January 12, 2010 to June 30, 2013
August 15, 2007 to January 11, 2010
Before August 15, 2007