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Soil Investigations for Data Collection in the Delta Initial Study/Proposed Mitigated Negative Declaration 36 b) Would the project result in a cumulatively considerable net increase of any criteria pollutant for which the project region is non-attainment under an applicable federal or state ambient air quality standard? Less than Significant Impact. The Proposed Project is a soil investigation and all activities would cease upon completion of the study. No permanent facilities or structures that would generate air pollutant emissions would be built for the Proposed Project, therefore, the following discussion is focused on short-term soil investigation activity emissions. Table 4 shows the estimated emissions generated from the Proposed Project within each Air District’s jurisdiction. Because the Proposed Project schedule will adhere to work windows to avoid impacts to sensitive species, on-land and overwater soil investigations may occur at different times, thus the emissions are quantified separately. The Proposed Project would implement all applicable Best Management Practices required by the Air Districts. The Proposed Project emissions would not exceed the Air District criteria pollutant significance thresholds (Table 5). Table 4: Total Estimated Exhaust Emissions of Criteria Pollutants (in pounds per day based on Impact Areas per air district) for the Proposed Project in each Air District Location Pollutant BAAQMD Exhaust Emissions SMAQMD Exhaust Emissions SJVAPCD Exhaust Emissions YSAQMD Exhaust Emissions On Land reactive organic gases 2.3 1.7 2.8 1.3 On Land nitrogen oxides 18.7 12.0 24.5 9.1 On Land PM10 0.7 0.4 1.0 0.3 On Land PM2.5 0.6 0.3 0.9 0.2 Over Water reactive organic gases 2.5 1.8 5.8 4.3 Over Water nitrogen oxides 25.2 17.7 58.0 42.9 Over Water PM10 0.9 0.6 2.0 1.5 Over Water PM2.5 0.9 0.6 2.0 1.5