CHAMBERS GROUP - Laserfiche WebLink

Home Browse Search

RFQ #20-100: Environmental and Planning Services CHAMBERS City of Santa Ana GROUP Air Quality, GHG, HRAs and Noise (Vista Environmental) Vista Environmental will provide the following tasks for conducting an air quality analysis, GHG analysis, and noise analysis for a project. The results of these studies would then be incorporated into the appropriate CEQA document, or in a standalone report. These tasks may vary depending on the project to be analyzed. Vista Environmental is also qualified to provide Energy and Health Risk Assessments (HRA)s if required for a project. A detailed scope will be provided on project basis. Air Quality Vista Environmental will provide the following tasks: • Evaluate and quantify regional criteria pollutant emissions associated with each project utilizing the CalEEMod. • Model and construction assumptions provided bythe Applicant. Calculate worst -case emissions based on all construction activities. Compare the proposed project's construction -related criteria pollutant emissions to the SCAB thresholds. If significant emission levels are found to be created from construction activities, feasible mitigation will be developed and quantified. • Provide a qualitative analysis of the construction -related toxic air contaminant (TAC) impacts from the project and detail how due to the limited duration of construction activities that the cancer and non -cancer risks would be less than significant. • Utilize the results of the above tasks to develop responses to each of the air quality related CEQA checklist questions. GHG Analyses Vista Environmental will provide the following tasks: • Evaluate and quantify GHG emissions associated with construction activities for the proposed project through utilization of the CalEEMod Model run used in the Air Quality Analysis. • Provide a qualitative operational GHG emissions analysis that details if a project would generate only nominal vehicle emissions associated with maintenance activities that would result in less than significant GHG emissions. • Evaluate the GHG emissions calculated by CalEEMod for construction activities and compare to all applicable GHG emissions thresholds including AB 32, SB 32, and SCAB GHG emissions thresholds. If necessary, develop mitigation to ensure the proposed project will meet each applicable measure. • Determine if the project would conflict with any applicable plan, policy or regulation of an agency adopted for the purpose of reducing the emissions of GHGs • Utilize the results of the above tasks to develop responses to each of the GHG related CEQA checklist questions. HRA The following summary includes the approach for preparing Health Risk Assessments by Vista Environmental. A detailed scope will be provided on a Project basis. • Quantify TAC emissions created from construction of the proposed Project through utilization of the same CaIEEMod Model run for the Air Quality Analysis in order to obtain the PM10 exhaust emissions from off -road equipment as well as to obtain the average daily truck trips during the duration of construction of the Project. Utilize the EMFAC2017 model to calculate the PM10 exhaust emission rates from the construction trucks. • Enter the construction -related TAC emission sources into the AERMOD model to calculate the TAC concentration levels at the nearby homes. • Quantify all sources of TAC emissions created from operation of the proposed Project that is anticipated to include diesel exhaust emissions from the running and idling of diesel trucks and possible operation of backup diesel generators. Utilize the Traffic Impact Analysis to quantify the number of truck trips and the PM10 exhaust emission factors. • Enter the operations -related TAC emission sources into the AERMOD model to calculate the TAC concentration levels at the nearby homes. • Utilize the methodology described in the Air Toxics Hot Spots Program Risk Assessment Guidelines Guidance Manual for Preparation of Health Risk Assessments (OEHHA Guidance), prepared by OEHHA, February 2015, to calculate the cancer and non -cancer (acute and chronic risks) from TAC emissions created from both construction and operation of the Project. �!,Wklw 9 Est /I1 1979 www.chambersgroupinacom