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ISR Resources

Emissions Assessment Models and Calculators

The ISR Program requires that emissions from development projects be quantified and analyzed using the most current version of District approved models and calculators.

Note: The District will continue to accept the use of SacMetro models and calculators, and OFFROAD for solar and transportation projects.

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ISR Annual Reports

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Fact Sheets and Brochures


March 19, 2008 Navigating the Indirect Source Review Application Process (2008 Version)
October 14, 2008 ISR Overview
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Rule 9510 and Rule 3180 Staff Report

As part of the rule development process, District staff prepare various documents detailing the components of the ISR Program. The support documents presented to the District Governing Board at the time of the rules adoption, along with the signed Board Resolution are available for your review.

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Web Links

Miscellaneous Links Planning Links


New California Emissions Estimator Model (CalEEMod)

The San Joaquin Valley Air Pollution Control District is transitioning to the use of the California Emissions Estimator Model (CalEEMod) when reviewing or preparing air impact assessments in compliance with provisions of District Rule 9510 (Indirect Source Review), California Environmental Quality Act (CEQA), and National Environmental Policy Act (NEPA), within the San Joaquin Valley air basin. CalEEMod is the newest computer emissions estimating model developed by the California Air Pollution Control Officers Association (CAPCOA). The model calculates criteria pollutant and greenhouse gas (GHG) emissions from a variety of land uses, including residential, commercial, retail, and industrial projects. CalEEMod also calculates the benefits of implementing mitigation measures, including GHG mitigation measures.

Deadline for Transition to CalEEMod: July 1, 2012

  • Air Impact Assessments deemed “Complete” before July 1st, 2012 will be analyzed using URBEMIS 2007. During this period, submitted applications that used CalEEmod will be reanalyzed by the District using URBEMIS 2007.
  • All Air Impact Assessments deemed “Complete” on or after July 1st, 2012 must be analyzed using CalEEMod.
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This page last updated on 01/06/2021