The document discusses air quality and noise assessments performed by Chambers Group over the past decade. It outlines various state and federal laws related to air quality, greenhouse gas emissions, and noise pollution. Chambers Group uses models like CALINE-4 and ISCST3 to assess impacts from projects on air quality and noise levels. They have assisted municipalities with greenhouse gas inventories and reduction plans in compliance with laws like AB 32 and SB 375. The document provides examples of projects Chambers Group has assessed, including studies for South Coast AQMD and air quality analysis for the Metropolitan Water District. It concludes by inviting contact for consultation on future projects.

1. Air Quality Assessment
The federal Clean Air Act was one of the first major environmental laws
that impacted industry in an effort to reduce smog and air pollution in
general. Pursuant to the federal Air Quality Act of 1967, State
governments enacted similar legislation that led to the establishment of air
quality control regions and local Air Districts. Chambers Group has
provided air quality impact assessments for over a decade measuring new
project impacts against local Air District standards.
In 2006, Governor Schwarzenegger signed the Global Warming Solutions
Act (AB 32) into law, which mandated regulations on how the state of
California will address global climate change impacts. The State Attorney General's Office is already
asking that individual projects be analyzed for impacts on global warming as part of the CEQA process.
Chambers Group air quality specialists were among the first to help southern California
municipalities with a method of inventory for Greenhouse Gas (GHG) emissions, creation of GHG
reduction plans and development of appropriate mitigation measures for GHG emission reduction
strategies.
Air quality and noise are somewhat related in that the cause of pollution can come from similar sources;
traffic and machinery/equipment use. Chambers’ staff use current atmospheric dispersion and noise
models such as California Line Source Dispersion Model (CALINE-4), Industrial Source Complex Short
Term (ISCST3) Model and Federal Highway Administration (FHWA) Traffic Noise Model (TNM) to
make assessments of impacts from proposed new projects. Similarly, FHWA and Regional Transportation
Plan (RTP) guidelines are followed during the process.
In California, Senate Bill 375 expands GHG reduction strategies for automobiles and light duty trucks to
coordinate with larger regional land use planning efforts toward “sustainable communities.” And
Chambers Group air quality staff have followed this legislation, have assisted local Council of
Governments and Transportation Planning Associations in directing their efforts, and plans to continue to
assist in that effort.
Air Quality and Noise capabilities include:
CEQA/NEPA-level Air Quality Analysis
Clean Air Act Conformity Analysis
Air Quality Mitigation Programs
General Plan Air Quality Elements
Emission Inventory Development
Air Toxics Heath Risk Assessments
Groundborne Vibration Analysis
Airport and Rail Noise Impact Analysis
Noise Impact for Commercial and Industrial Stationary Sources
General Plan Noise Elements CEQA-level Noise and Vibration Impact Analysis

2. Global Warming/Global Climate Change
California Global Warming Solutions Act (AB 32) Compliance
GHG Emission Inventories
GHG Reduction Programs
Project Examples:
South Coast AQMD – Performed studies for AQMD to characterize air quality impacts from average
large construction site activities in LA, Orange, Riverside and San Bernardino counties.
OCTA SR-91 Eastbound Additional Lane – Performed air quality and noise CEQA/NEPA analyses
under Caltrans Districts 8 & 12 review including PM10 and PM2.5 studies and FHWA TNM noise
modeling for sensitive residential receptors.
GHG Emission Inventory and GHG Reduction Plan – Prepared city-wide GHG emissions inventory
by land use type for Pasadena base year 1990 including direct mobile sources, stationary sources, and area
sources and indirect emissions from equipment use energy. Reduction plan followed using existing and
new city conservation programs.
Metropolitan Water District of Southern California – Performed air quality analysis of impacts from
construction of a 7-foot diameter feeder pipeline from Anaheim to Placentia.
Chemoil Terminal Tank Farm Expansion – Performed peer review of applicant technical air quality
studies for CEQA impacts.
Redhill Grade Separation, City of Tustin – Performed CEQA/NEPA air quality impact analysis for
construction and operation of the OCTA-SCRRA railway crossing project for the physical vertical
separation of road and railway alignments.
Industrial Complex, County of Riverside – Performed a CEQA air impact analysis of the proposed
construction/operation of a 358,000 sq. ft. facility.
Electrical Substation, City of Moreno Valley Public Works – Performed air quality CEQA impact
study for the construction of a new electrical substation and switchyard.
Contact Chambers Group for a free consultation on your next project!
Cimberly Gonzales
5 Hutton Centre Dr., Suite 750
Santa Ana, Ca 92707
949-261-5414 ext. 7209 office
949-275-3887 cell
cgonzales@chambersgroupinc.com