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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 Unmitigated (Ibslday Mitigated (Ibslda) SCAQMD Threshold <br />ROG 8.36 8.36 75 <br />NOx 78.53 78.53 100 <br />CO 40.07 40.07 550 <br />PM10 23.89 15.20 150 <br />S02 0.04 0.04 150 <br />PM2.5 7.66 5.85 55 <br />C02 9.797.61 9.797.61 N/A <br />Bald-underline indicates exceedance of SCAQMD Threshold. <br />Site Trenching/Foundation 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 I Foundation - Phase 1 <br /> <br />Pollutant Unmitigated <br />(Ibslday) <br />SCAQMD Threshold <br />ROG 1.98 75 <br />NOx 16.48 100 <br />CO 9.05 550 <br />PM 10 0.83 150 <br />S02 0.00 150 <br />PM 2.5 0.76 55 <br />C02 1,839.01 N/A <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 />75B-67