Packet 4.28.25 - Laserfiche WebLink

Home Browse Search

16558-03 AQ & GHG Assessment 6 Warner Avenue Footlab REGIONAL OPERATIONAL EMISSIONS Operational emissions associated with the Project are summarized in Table 5. Project operational- source emissions would not exceed the numerical thresholds of signiffcance established by the SCAQMD for any criteria pollutant, a less than signiffcant impact would occur for Project-related operational-source emissions and no mitigation is required. TABLE 5: PEAK OPERATIONAL EMISSIONS SUMMARY Source Emissions (lbs/day) VOC NOX CO SO2 PM10 PM2.5 Summer Mobile 11.50 8.44 97.20 0.25 24.00 6.20 Area 1.83 0.02 2.53 <0.005 <0.005 <0.005 Energy 0.04 0.67 0.56 <0.005 0.05 0.05 Maximum Daily Emissions 13.37 9.13 100.29 0.25 24.05 6.25 SCAQMD Regional Thresholds 55 55 550 150 150 55 Threshold Exceeded? NO NO NO NO NO NO Winter Mobile 11.40 9.17 90.40 0.24 24.00 6.20 Area 1.42 0.00 0.00 0.00 0.00 0.00 Energy 0.04 0.67 0.56 0.00 0.05 0.05 Maximum Daily Emissions 12.86 9.84 90.96 0.24 24.05 6.25 SCAQMD Regional Thresholds 55 55 550 150 150 55 Threshold Exceeded? NO NO NO NO NO NO AIR QUALITY LOCALIZED EMISSIONS THRESHOLDS For this Project, the appropriate source receptor area (SRA) for the localized signiffcance thresholds (LST) analysis is the SCAQMD Central Orange County monitoring station (SRA 17). LSTs apply to CO, NO2, PM10, and PM2.5. The SCAQMD produced look-up tables for projects less than or equal to 5 acres in size. The SCAQMD’s screening look-up tables are utilized in determining localized impacts. It should be noted that since the look-up tables identify thresholds at only 1 acre, 2 acres, and 5 acres, linear regression has been utilized to determine localized signiffcance thresholds. Consistent with SCAQMD guidance, the thresholds presented in Table 6 were calculated by interpolating the threshold values for the Project’s disturbed acreage. The acres disturbed is based on the equipment list and days in the demolition, site preparation, mass grading, and ffne grading phase according to the anticipated maximum number of acres a given piece of equipment can pass over in an 8-hour workday. The equipment-speciffc grading rates are summarized in the CalEEMod user’s guide, Appendix A: Calculation Details for CalEEMod (15). It should be noted that the disturbed area per day is representative of a piece of equipment making multiple passes over the same land area. In other words, one Rubber Tired Dozer can make multiple passes over the same land area totaling 0.5 acres in a given 8-hour day. Appendix A of the CalEEMod User Manual only identiffes equipment-speciffc grading rates for Crawler Tractors, Graders, Rubber