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Responses to <br />Environmental Checklist <br />For CEQA Compliance <br />As such, significant impacts due to a conflict with a Congestion Management <br />Plan would not occur. <br />B. Violate any stationary source air quality standard or contribute to an existing or <br />proposed air qualify violation? <br />Findin : Less than Significant Impact. <br />AnaIVS_is: The SQAMD, in its CEQA Handbook, publishes air quality thresholds to <br />determine if a project would have a significant air quality impact. These <br />thresholds are shown in Table 2. <br />Table 2, SCA6ZMD Emissions Slgnlffcanc® Thresholds pbs/day~ <br />~. . <br />ROG <br />75 s.- . . <br />55 <br />NOx 100 55 <br />CO 550 150 <br />PM-10 150 150 <br />PM-2.5 55 55 <br />SOx 150 150 <br />Lead 3 3 <br />Source: SCAQMD CEQA Air Quality Handbook, November 1yy3 Kev. <br />Temporary construction activity emissions would occur during demolition of the <br />existing sewer lift statian and during construction of the proposed lift statian. <br />Such emissions include on-site generation of dust and equipment exhaust, and <br />off-site emissions firom construction employee commuting and/or trucks <br />delivering construction materials. Potentially significant air quality impacts <br />associated with the project's short-term construction activities are discussed <br />below for each pollutant. In the long-term, the proposed new sewer lift station <br />would merely replace and upgrade an existing sewer lift station located 700 feet <br />to the west. As such, there would be no net increase in criteria pollutants with <br />long-term operation of the proposed project, and impacts would not be <br />significant. <br />PM~o and PM,S <br />Dust is normally the primary concern during construction of infrastructure. <br />Because such emissions are not amenable to collection and discharge through a <br />controlled source, they are called fugitive emissions. Because of the inherent <br />uncertainty in the predictive factors for estimating fugitive dust generation (soil silt <br />content, soil moisture, wind speed, area simultaneously disturbed, number of <br />construction vehicles, etc.), regulatory agencies typically use one universal <br />default factor based on the area disturbed assuming that all other input <br />parameters into emission rate prediction fall into mid-range average values. <br />Page 35 0# 64 <br />75E-39 <br />