Laserfiche WebLink
soil using 20 cy dump trucks traveling 1,000 miles per day. The following table depicts the results for this <br />construction phase. No thresholds were exceeded for the mass grading/excavation phase. <br />Mass Grading /Excavation <br />Pollutant <br />Unmitigated (Ibslday) <br />Mitigated (Ibslday) <br />SCAQMD Threshold <br />RGG <br />8.36 <br />8.36 <br />75 <br />NGx <br />78.53 <br />78.53 <br />100 <br />CO <br />40.07 <br />40.07 <br />550 <br />PM 1a <br />23.89 <br />15.20 <br />150 <br />S02 <br />0.04 <br />0.04 <br />150 <br />PM2.5 <br />7.66 <br />5.85 <br />55 <br />Coe <br />9.797.61 <br />9.797.61 <br />NIA <br />Bold - underline indicates exceedance of SCAQMD Threshold. <br />Site Trench inglFo undation Emissions <br />This phase includes work on the site to prepare for utilities and foundation footing work to support the <br />structures. The estimates are based on use of 4 pieces of heaving equipment including 2 excavators, 1 other <br />general industrial equipment and 1 tractor /loader/backhoe over a period of approximately 10 active work <br />days. No mitigation measures were included in the model. No thresholds were exceeded for the site <br />trenching foundation phase of construction. <br />Trenching 1 Foundation — Phase 1 <br />Pollutant <br />Unmitigated <br />(Ibs /day) <br />SCAQMD Threshold <br />RGG <br />1.98 <br />75 <br />Nox <br />16.48 <br />100 <br />CO <br />9.05 <br />550 <br />PM 10 <br />0.83 <br />150 <br />Sot <br />0.00 <br />150 <br />PM 2.5 <br />0.76 <br />55 <br />Cot <br />11839.01 <br />NIA <br />Bold - underline indicates exceedance of SCAQMD Threshold. <br />Building Construction Emissions <br />The construction phase includes the construction of the 6 -level parking structure with one subterranean level <br />and five above - ground levels (approximately 140,000 square feet). Model defaults included potential <br />emissions that would be associated with the construction activities and the movement of materials and work <br />crews to /from the site. The estimates were based on using 6 pieces of equipment including 2 forklifts, <br />1 tractor /loader/backhoe, 2 aerial lifts, and 1 crane over a period of approximately 210 active work days. <br />Equipment operating hours were estimated at 8 hours per day for all equipment with the exception of the <br />forklifts (6 hours per day) and the crane (4 hours per day). As depicted in the table below, no thresholds were <br />exceeded for this phase. <br />MacArthur Place South EIR — 2011 Addendum 22 <br />