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Docu9ign Envelbpe ID: BE74E31B-F73A-4A43-F '?8D4E6CBC6F5 dioxide, methane, and nitrous oxide. FCS will use BAAQMD thresholds of significance to evaluate the project's construction and operational GHG emissions. In addition, FCS will analyze the project's consistency with the City of Pleasanton's Climate Action Plan as required by CEQA. Changes to the project that occur after completing the modeling analysis that require re -modeling will be considered additional work that is not covered by this scope of work. Assess Odor Exposure The analysis will assess odor exposure to nearby residents. The discussion will compare the project to the screening criteria and buffer distances prescribed by BAAQMD and the California Air Resources Board (ARB). FCS will provide a qualitative analysis of the project's potential to generate an odor impact. Based on the project land uses (i.e., residential), it is not anticipated that the project would result in an odor impact. Assess Carbon Monoxide Hotspot Impacts FCS will use the BAAQMD's screening criteria for carbon monoxide (CO) hotspots, which is anticipated to be sufficient to dismiss any potential impacts. However, in the case that potential CO hotspots are identified, FCS will use dispersion modeling to quantify impacts according to BAAQMD guidance under a revised scope of work and budget. Quantitative CO Hotspot modeling would be considered additional services, if required. Construction -Related Health Risk Assessment Based on the area of land to be disturbed, land uses developed, and proximity to sensitive receptors, FCS anticipates that a construction -related Health Risk Assessment (HRA) will be necessary to evaluate the project's construction -related toxic air contaminant (TAC) emissions. FCS will prepare a construction HRA based on the recommended BAAQMD's Health Risk Assessment Guidelines (HRA Guidelines) (BAAQMD 2016) and Office of Environmental Health Hazard Assessment's (OEHHA) Risk Assessment Guidelines (OEHHA 2015). The following tasks will be required for the construction HRA: FCS will perform the following tasks as part of this analysis. • Define what a sensitive receptor is and identify nearby sensitive receptors. Identify health risk standards and acceptable cancer and acute and chronic non -cancer risk thresholds from diesel emissions that are detailed in BAAQMD's thresholds of significance. The following subtasks will be utilized to perform the construction -related HRA: - Calculate the on -site construction equipment diesel equipment PM2.5 and total organic gases emissions rates that were calculated in the AQ Analysis prepared for the proposed project. Calculate the daily construction truck trip estimates used in the AQ Analysis and calculate each truck trip's PM2.5 emissions rates through use of the EMFAC2017 model. Model the diesel PM2,5 concentrations at representative nearby sensitive receptors associated with the on -site construction equipment and off -site truck emissions up to 1,000 feet from the project site through utilization of the AERMOD model, using the emissions rates provided in the previous steps and the methodology described in the HRA Guidelines. 11MI AMFRWA I EURU216 I AiiMGA I AUSTRALIA I ASIA FIRSTCARBONSOLUTIONS.COM