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Rubber Tired Dozers 0.5 <br />Scrapers <br />Based on this table, the proposed will result in a maximum of l acre disturbed during peak <br />construction grading activity (1 dozer x 0.5 + I grader x 0.5 = I acres disturbed). <br />Per LST guidance, only on-site construction activity is considered in the LST analysis. On-site <br />construction emissions are provided in the CalEEMod output files and do not include sources <br />such as on-road haul, worker commuting or vendor delivery emissions. Therefore, the following <br />thresholds and emissions are determined (pounds per day). <br />LST and Project Emissions <br /> CO NOx PM-10 PM-2.5 <br />LST Thresholds Centrnl <br />Orange County <br />1 acre 200 meters <br />2,109 <br />123 <br />60 <br />22 <br />Max On-Site Emissions <br />Demolition <br />Unmitigated 25 42 6 2 <br />Mitigated 25 42 3 2 <br />Grading <br />Unmitigated 20 31 8 5 <br />Mitigated 20 3l 4 3 <br />onstruction <br />L <br />nmiti ated 19 25 2 <br />iti ted 19 25 2 2 <br />CalEEMod Output in Appendix (maximum mitigated emissions from on-site construction) <br />LSTs were compared to the maximum daily construction activities. As seen above, emissions <br />are below the LST for construction. The only mitigation measure applied was the following dust <br />suppression measure: <br />• Water exposed surfaces at least 3 titres per day for fugitive dust suppression <br />Facilities such as churches are not included in the definition of sensitive receptor because church <br />employees do not typically remain on site for a full 24 hours, but are present for shorter periods <br />of time, such as eight hours. However, by applying a 24-hour standard for pollutants with shorter <br />averaging periods, such as N02 and CO, LSTs could also be applied to these receptors since it is <br />reasonable to assume that an employee at these sites could be present for periods of one to eight <br />hours. The Orange County Southern Baptist Church is immediately east of the site. Therefore, <br />comparing LSTs for CO and NOx for a source receptor distance of 25 meters would provide the <br />comparison (pounds per day). Again, LST emissions are much less than significance thresholds. <br />IAIIE VSL AQ -l <br />75A-128