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Responses to <br />Environmental Checklist <br />For CEQA Compliance <br />EMISSION THRESHOLDS OF SIGNIFICANCE <br /> Project <br />Pollutant Construction Operations <br /> PoundslDay Pounds/Day <br />Reactive Organic <br />Com ounds ROG 75 55 <br />Nitro en Oxides NOx 100 55 <br />Carbon Monoxide CO 550 550 <br />Respirable 10-micron dia. <br />articulate Matter PM10 150 150 <br />Fine 2.5-micron diameter 55 55 <br />articulate matter <br />Oxides of Sulfur Sox 150 150 <br />Long-Term Operational Air Quality Impacts <br />The primary source of long-term operational emissions associated with the proposed project would be <br />generated by vehicle travel to and from the project site. A relatively minor amount of gaseous emissions <br />would also occur from natural gas and electricity usage and the operation of outdoor maintenance <br />equipment and space cooling devices. The proposed project would contribute long-term emissions that <br />are less than the SCAOMD's threshold of significance, therefore the operational impacts is less than <br />significant. <br />Short-term Constructed Related Air Quality Impacts <br />Construction operations associated with the proposed project could potentially result in short-term <br />increases in particulate matter, and to a lesser degree increases in carbon monoxide and ozone. Peak <br />day construction emissions for most pollutants arising from construction of the proposed project would <br />occur during the grading and utilities phase, vertical construction and exterior finishing and the installation <br />of landscaping improvements and paving. <br />Using the South Coast Air Quality Management District CEQA Air Quality Handbook as a general <br />guideline, the threshold for potentially significant short-term air quality impacts would involve the grading <br />of an area larger than the 40,000 square feet of graded lot area proposed for this project. The amount of <br />grading activities for the proposed project would be considerably less than the threshold of significance <br />outlined in the CEQA Air Quality Handbook. While the construction related emissions associated with the <br />proposed project would not exceed the thresholds established by the SCAOMD, the emissions could be a <br />nuisance to other existing land uses in the nearby vicinity of the project site. To minimize short-term <br />construction related to air impacts within the project area, the following mitigation measures shall be <br />implemented. <br />MM AQ-1 As required by South Coast Air Quality Management District (SCAQMD) Rule 403- <br />Fugitive Dust, all construction activities that are capable of generating fugitive dust are <br />required to implement dust control measures during each phase of project development <br />to reduce the amount of particulate matter entrained in the ambient air. These measures <br />include the following: <br />31 A-37 <br />