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Traffic & Transportation

Air Quality Services

Highway-Related Air Quality Analyses

• Mobile Source Air Quality Evaluations
• Micro-scale Air Quality Modeling
• MOBILE 6.2 – Mobile Source Emission Factor Modeling
• Cal3QHC – Mobile Source Dispersion Modeling
• Particulate Matter (PM10/PM2.5) Monitoring and Modeling
• Mobile Source Air Toxics (MSAT) Analyses
• Regional Conformity Documentation
• Policy Development

Airport-Related Air Quality Analyses

• Airport/Runway Expansion Projects
• Air Quality Modeling using Federal Aviation Administration (FAA) Emission Dispersion Modeling System (EDMS)
• Regional Conformity Documentation

Rail-Related and Transit Air Quality Assessments

• EPA-Compliant Project-Level Air Quality Assessments
• Regional Conformity Documentation

Point Source Air Quality Monitoring and Modeling

• National Ambient Air Quality Standards (NAAQS) Compliance Monitoring
• Point Source Air Quality Modeling
• Meteorological Monitoring
• Preparation of Emission Inventories
• New Source Review and Title V Permitting
• Compliance Audits
• Evaluation of Control Technology (BACT, RACT, LAER, MACT) Analyses
• Certified Visible Emission Evaluations (Using EPA Method 9 and Method 22)
• Expert Testimony and Litigation Support