Air Quality Assessment


Edwards-Pitman Environmental, Inc. (EPEI) is experienced with preparing air quality assessments to address impacts from transportation projects to carbon monoxide (CO) concentrations, particulate matter (PM2.5), Mobile Source Air Toxics (MSAT), and ozone. EPEI is capable of conducting qualitative and quantitative assessments in general accordance with state Departments of Transportation (DOT) guidelines and Federal Highway Administration (FHWA) guidelines and regulations. The microscale model used to assess CO levels was CAL3QHC, developed by the California Department of Transportation. CAL3QHC combines the California Line Source Model (CALINE3) developed by the California Department of Transportation with an algorithm for estimating queue lengths at signalized intersections. EPEI uses the latest available software to conduct quantitative analysis for CO concentrations. Modeling software includes CALQVIEW2®, a Windows-based software that incorporates CAL3QHC. This model is accepted by the US Environmental Protection Agency (EPA) and FHWA for use in “hot spot” analysis.

Qualitative assessments for MSAT, PM2.5, and ozone for nonattainment areas are based on the type of project in the current State Transportation Improvement Program (STIP) and applicable criteria. Assessments are conducted in accordance with EPA and FHWA guidance documents including Transportation Conformity Guidance for Qualitative Hot-Spot Analyses in PM2.5 and PM10 Nonattainment and Maintenance Areas (EPA420-B-06-902, March 2006) and Interim Guidance on Air Toxic Analysis in NEPA Documents (September 30, 2009).

Noise Assessment


Edwards-Pitman Environmental, Inc. (EPEI) is experienced with conducting noise impact assessments and design of noise barrier walls for transportation projects. Assessments, including field survey and data collection, data analysis, and modeling are conducted in general accordance with state Departments of Transportation (DOT) guidance and federal regulations including the Federal Highway Administration (FHWA) (23 CFR 772, Procedures for Abatement of Highway Traffic Noise and construction Noise) and Federal Transit Authority (FTA). The company uses Transportation Noise Model (TNM) version 2.5 to conduct noise assessments and barrier design. TNM 2.5 is the required modeling software by the FHWA for transportation projects for state DOTs. EPEI has conducted noise impact assessments and noise walls designs on projects ranging in scope from less than one mile to over 20 miles in length.

Air


  • US 78 at SR 124 Continuous Flow Intersection in Snellville, Georgia on behalf of GDOT
  • Linecrest Road, New Alignment Connector Roadway in DeKalb County, Georgia on behalf of GDOT
  • I-85 HOV to HOT Conversion Project in Gwinnett County, Georgia on behalf of GDOT
  • Battle Creek/Mt. Zion Road Widening and Improvement Project in Clayton County, Georgia on behalf of GDOT
  • SR 44 Widening in Greene and Putnam Counties, Georgia on behalf of GDOT
  • Widening of I-85 in Banks and Jackson Counties, Georgia on behalf of GDOT
  • Marietta Boulevard at Bolton Road Intersection Improvements in Fulton County, Georgia on behalf of GDOT
  • SR 9 Widening and Improvements in Alpharetta, Georgia on behalf of GDOT
  • Social Circle Bypass in Walton, Georgia on behalf of GDOT
  • Torras Causeway Improvements in Glynn County, Georgia on behalf of GDOT
  • SR 107 Widening and Improvements in Turner, Irwin, and Ben Hill Counties, Georgia on behalf of GDOT
  • Lee Road Widening in Douglas County, Georgia on behalf of GDOT

Noise Impact Assessments


  • SR 17 Widening and Improvement in Hart and Elbert Counties, Georgia on behalf of GDOT
  • Jimmy DeLoach Connector in Savannah, Georgia on behalf of GDOT
  • College Park Road Widening in Summerville, South Carolina on behalf of SCDOT
  • Godby Road Widening and Improvement in Clayton County, Georgia on behalf of GDOT
  • Ball Street Extension New Alignment Road in Peach County on behalf of GDOT
  • Glade Road Widening and Improvement in Bartow County, Georgia on behalf of GDOT
  • Eagles Landing Parkway Improvements in Henry County, Georgia on behalf of GDOT
  • West Bay Street Improvements in Savannah, Georgia on behalf of GDOT
  • Macon Intermodal Facility in Macon, Georgia on behalf of GDOT

Noise Impact Assessment and Noise Barrier Analysis and Design


  • I-75 Auxiliary Lane Construction in Henry County, Georgia on behalf of GDOT
  • Four Interchange Modification and Redesigns on I-75 in Tift County, Georgia on behalf of GDOT
  • Bluffton Parkway New Alignment Roadway in Bluffton, South Carolina on behalf of Beaufort County, South Carolina
  • I-26 Widening in Charleston, South Carolina on behalf of SCDOT
  • SR 11/US 41 at Houston Lake Road Intersection Realignment and Improvement in Houston County, Georgia on behalf of GDOT