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As you can see in the excerpt above, the model calculates 267 hauling truck trips for demolition. According to the "User Entered Comments & Non -Default Data" table, the justification provided for these changes is: "Estimated tons of demolished material based on AQconstruction questionnaire" (Appendix B, pp. 79, 111, 231). However, this justification is incorrect for two (2) reasons. First, the Addendum and associated documents fail to provide an AQ construction questionnaire, as referenced. As such, we are unable to verify the inputted amount of demolition material as claimed. Second, the Addendum fails to disclose the specific square footage of facilities to be demolished or the tons of debris resulting from this demolition. Thus, we cannot verify that the hauling trip number calculated in the model is the result of the input of the correct amount of demolition. As such, demolition may be underestimated. This potential underestimation presents an issue, as the total amount of demolition material is used by CaIEEMod to determine emissions associated with this phase of construction. The three primary operations that generate dust emissions during the demolition phase are mechanical or explosive dismemberment, site removal of debris, and on -site truck traffic on paved and unpaved road.12 Thus, by failing to substantiate the demolition of existing structures and hardscape, emissions associated with fugitive dust, site removal, and exhaust from hauling trucks traveling to and from the site may be underestimated. As a result, the model may underestimate the Project's construction -related emissions and should not be relied upon to determine the significance of the Project's air quality impacts. Use of Underestimated Operational Vehicle Trips According to the Traffic Impact Analysis ("TIA"), provided by Appendix K to the Addendum, the proposed Project is expected to generate 1,171 daily vehicle trips throughout operation (Appendix K, pp. 314, Table 5-1). However, review of the "Project Traffic Generation Forecast Table" demonstrates that a 5% non -auto trip reduction was applied to the Project's daily vehicle trip estimate, resulting in a reduction of 59 vehicle trips (see excerpt below) (Appendix K, pp. 314, Table 5-1). "CalEEMod User Guide, Appendix A, p. 11, available at: http://www.caleemod.com/ 75C-81