RES 211231 Exhibit A - Laserfiche WebLink

Environmental Checklist and City of Pleasanton–10x Genomics Project Environmental Evaluation Initial Study/Mitigated Negative Declaration 34 FirstCarbon Solutions Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480024/ISMND/wp/21480024 10x Genomics Project Full Screencheck ISMND.docx According to Applicant-provided information, dated October 22, 2020, and revised January 6, 2021, the proposed project would involve the removal of an estimated 240,000 square feet of pavement during Phase 2. As calculated in the Hauling Calculations sheet contained in Appendix A, the pavement removal would generate an estimated 9,000 tons of debris. The proposed project would also involve the removal of approximately 200 cubic yards of vegetation during site preparation activities and the exportation of approximately 1,500 cubic yards of cut soil during grading activities. For a more detailed description of the construction parameters and debris calculations used in estimating air pollutant emissions, please refer to Appendix A. Average daily construction emissions are compared with the significance thresholds in Table 4. Table 4: Unmitigated Construction Emissions (Average Daily Rate) Construction Activity ROG NOX PM10 Exhaust PM2.5 Exhaust Tons per Year Construction Phase 1 Site Preparation 0.04 0.34 0.02 0.02 Grading 0.06 0.78 0.03 0.03 Building Construction 0.11 0.90 0.02 0.02 Paving 0.02 0.08 0.00 0.00 Architectural Coating 0.86 0.22 0.01 0.01 Construction Phase 2 Pavement Removal 0.08 0.85 0.03 0.03 Building Construction 0.02 0.15 0.00 0.00 Year 2021 Total 1.19 3.32 0.12 0.11 Building Construction 0.11 0.87 0.02 0.02 Paving 0.01 0.08 0.00 0.00 Architectural Coating 0.70 0.23 0.01 0.01 Construction Phase 3 Building Construction 0.03 0.23 0.01 0.01 Paving 0.00 0.03 0.00 0.00 Architectural Coating 0.62 0.07 0.00 0.00 Year 2022 Total 1.47 1.51 0.05 0.05 Emission Summary and Analysis Total Emissions (Tons)1 2.66 4.83 0.17 0.16 Total Emissions (Pounds)1 5,320 9,665 343 321 Average Daily Emissions (lbs/day)2 13.96 25.37 0.90 0.84