On April 10 LADCO issued an RFP to conduct gridded air quality modeling and analysis to evaluate the sensitivity of ground-level ozone concentrations to changes in precursor emissions. The objective of this project is to quantify the surface ozone changes from reducing the emissions of NOx or VOCs from different inventory sectors. A gridded, regional-scale air quality model will be used to simulate the changes in ozone from reducing ozone precursor emissions in the LADCO region. Analysis of the changes in ozone concentrations will focus on counties in 2015 O3 NAAQS nonattainment and maintenance areas in the LADCO region.


The goal of this study is to identify optimal ozone reduction strategies for key receptor areas in the LADCO region.


LADCO is seeking contractor support on a series of three technical tasks to design and execute a simulation of the 2016 ozone season using a gridded chemistry-transport model, and to interpret the results of a sensitivity configuration to quantify how surface ozone concentrations in key receptor areas respond to reductions in precursor emissions. While LADCO envisions that ozone response surfaces or ozone isopleths for each receptor area by inventory sector may be useful products of this analysis, we are seeking creative proposals that will help us identify emissions reduction strategies to attain the 2015 ozone NAAQS in each of the 2015 Ozone NAAQS nonattainment areas in the LADCO region.


Proposals are due to LADCO on May 8, 2020 and we expect to award the project June 1.


See the LADCO RFPs page for details on this project.

About Author

Zac Adelman
Zac is LADCO's Executive Director. He's an environmental scientist with 20+ years experience in emissions and air quality modeling.

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