Agenda packet — Upland City Council, January 12, 2026 (part 6 of 10)

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2.5. Operations Emissions by Sector, Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Sector ROG NOx CO SO2 PM1OE PM1OD PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N20 R CO2e Daily, - - - - - - - - - - - - - - - - - Summer
(Max)
Mobile 0.37 0.45 4.51 0.01 0.01 1.04 1.05 0.01 0.26 0.27 - 1,214 1,214 0.05 0.05 4.18 1,234 Area 0.24 <0.005 0.34 <0.005 <0.005 - <0.005 <0.005 - <0.005 - 1.39 1.39 <0.005 <0.005 - 1.39 Energy 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 335 335 0.02 <0.005 - 336 Water - - - - - - - - - - 2.14 16.8 18.9 0.22 0.01 - 26.1 Waste - - - - - - - - - - 10.2 0.00 10.2 1.02 0.00 - 35.8 Refrig. - - - - - - - - - - - - - - - 843 843 Total 0.61 0.46 4.84 0.01 0.01 1.04 1.05 0.01 0.26 0.27 12.4 1,567 1,579 1.31 0.06 847 2,477 Daily, - - - - - - - - - - - - - - - - - Winter
(Max)
Mobile 0.35 0.49 3.66 0.01 0.01 1.04 1.05 0.01 0.26 0.27 - 1,137 1,137 0.05 0.05 0.11 1,154 Area 0.18 - - - - - - - - - - - - - - - - Energy 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 335 335 0.02 <0.005 - 336 Water - - - - - - - - - - 2.14 16.8 18.9 0.22 0.01 - 26.1 Waste - - - - - - - - - - 10.2 0.00 10.2 1.02 0.00 - 35.8 Refrig. - - - - - - - - - - - - - - - 843 843 Total 0.53 0.49 3.66 0.01 0.01 1.04 1.05 0.01 0.26 0.27 12.4 1,489 1,501 1.31 0.06 843 2,395 Average - - - - - - - - - - - - - - - - - Daily
Mobile 0.35 0.50 3.81 0.01 0.01 1.04 1.05 0.01 0.26 0.27 - 1,149 1,149 0.05 0.05 1.80 1,168 Area 0.22 < 0.005 0.23 <0.005 <0.005 - <0.005 <0.005 - <0.005 - 0.95 0.95 <0.005 <0.005 - 0.95 Energy 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 335 335 0.02 <0.005 - 336 Water - - - - - - - - - - 2.14 16.8 18.9 0.22 0.01 - 26.1 Waste - - - - - - - - - - 10.2 0.00 10.2 1.02 0.0(Page-6-70 of 13343 9/35

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Refrig. - - - - - - - - - - - 843 843 Total 0.57 0.50 4.04 0.01 0.01 1.04 1.05 0.01 0.26 0.27 12.4 1,502 1,514 1.31 0.06 845 2,410 Annual - - - - - - - - - - - - - - - Mobile 0.06 0.09 0.70 <0.005 <0.005 0.19 0.19 <0.005 0.05 0.05 - 190 190 0.01 0.01 0.30 193 Area 0.04 <0.005 0.04 <0.005 <0.005 - <0.005 <0.005 - <0.005 - 0.16 0.16 <0.005 <0.005 - 0.16 Energy 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 55.4 55.4 <0.005 <0.005 - 55.7 Water - - - - - - - 0.35 2.78 3.14 0.04 <0.005 - 4.31 Waste - - - - - - - - - - 1.69 0.00 1.69 0.17 0.00 - 5.92 Refrig. 140 140
Total 0.10 0.09 0.74 < 0.005 <0.005 0.19 0.19 < 0.005 0.05 0.05 2.05 249 251 0.22 0.01 140 399

3. Construction Emissions Details

3.1 . Site Preparation (2025) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N20 R CO2e Onsite - - - - - - - - - - - - - - - - - Daily, - - - - - - - - - - - - - - - - - Summer
(Max)
Off-Road 1.31 12.1 12.1 0.02 0.56 - 0.56 0.52 - 0.52 - 2,065 2,065 0.08 0.02 - 2,072 Equipment
Dust - - - - - 1.63 1.63 - 0.78 0.78 - - - - - - - From
Material
Movemen t
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Daily, - - - - - - - - - - - - - - - - - Winter
(Max)

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Average - - - - - - -
Daily
Off-Road 0.01 0.07 0.07 < 0.005 <0.005 - <0.005 <0.005 - <0.005 - 11.3 11.3 <0.005 <0.005 - 11.4 Equipment
Dust - - - - - 0.01 0.01 - <0.005 <0.005 - - - - - -From Material
Movement
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Annual
Off-Road <0.005 0.01 0.01 < 0.005 <0.005 - <0.005 <0.005 - <0.005 - 1.87 1.87 <0.005 <0.005 - 1.88 Equipment
Dust - - < 0.005 <0.005 - <0.005 <0.005 - - - - - - - From
Material
Movement
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Offsite
Daily,
Summer
(Max)
Worker 0.03 0.03 0.58 0.00 0.00 0.10 0.10 0.00 0.02 0.02 - 106 106 <0.005 <0.005 0.39 107 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Daily, - - - - - - - - - - - - - - - - - Winter
(Max)
Average - - - - - - - - - - - - - - - - - Daily
Worker <0.005 <0.005 <0.005 0.00 0.00 <0.005 <0.005 0.00 <0.005 <0.005 - 0.54 0.54 <0.005 <0.005 <0.005 0.55 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00

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San Antonio Water HQ Custom Report, 11/7/2024
Annual - - - - - - - - - - - - - - - -Worker <0.005 <0.005 <0.005 0.00 0.00 <0.005 <0.005 0.00 <0.005 <0.005 - 0.09 0.09 <0.005 <0.005 <0.005 0.09 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00

3.3. Grading (2025) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite - - - - - - - - - - - - - - - - - Daily, - - - - - - - - - - - - - - - - - Summer
(Max)
Off-Road 1.51 14.1 14.5 0.02 0.64 - 0.64 0.59 - 0.59 - 2,455 2,455 0.10 0.02 - 2,463 Equipment
Dust - - - 1.84 1.84 - 0.89 0.89 - - - - - - - From
Material
Movemen t
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Daily, - - - - - - - - - - - - - - - -Winter (Max)
Average - - - - - - - - - - - - - - - - - Daily
Off-Road 0.02 0.15 0.16 <0.005 0.01 - 0.01 0.01 - 0.01 - 26.9 26.9 <0.005 <0.005 - 27.0 Equipment
Dust - - - - - 0.02 0.02 - 0.01 0.01 - - From
Material
Movemen
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Annual - - - - - - - - - - - - - - - Page 73 of 1374 12/35

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Off-Road <0.005 0.03 0.03 <0.005 <0.005 - <0.005 <0.005 - <0.005 - 4.45 4.45 <0.005 <0.005 - 4.47 Equipment
Dust - - - - - <0.005 <0.005 - <0.005 <0.005 - - - - - -From Material
Movemen t
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Offsite - - - - - - - - - - -
Daily, - - - - - - - - - - - - - - - - - Summer
(Max)
Worker 0.05 0.04 0.78 0.00 0.00 0.13 0.13 0.00 0.03 0.03 - 141 141 0.01 <0.005 0.52 143 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Daily, - - - - - - - - - - - - - - - - - Winter
(Max)
Average - - - - - - - - - - - - - - - - - Daily
Worker <0.005 <0.005 0.01 0.00 0.00 <0.005 <0.005 0.00 <0.005 <0.005 - 1.44 1.44 <0.005 <0.005 <0.005 1.46 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Annual - - - - - - - - - - - - - - - - - Worker <0.005 <0.005 <0.005 0.00 0.00 <0.005 <0.005 0.00 <0.005 <0.005 - 0.24 0.24 <0.005 <0.005 <0.005 0.24 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00

3.5. Building Construction (2025) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location ROG NOx CO SO2 PM10E PM1OD PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N20 R CO2e Onsite - - - - - - - - - - - - - - - Page-674 of 1 3-74 13/35

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Daily, - - - - - -
Summer
(Max)
Off-Road 1.07 8.95 10.0 0.02 0.33 - 0.33 0.30 - 0.30 - 1,801 1,801 0.07 0.01 - 1,807 Equipment
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Daily, - - - - - - - - - - - - - - - - - Winter
(Max)
Off-Road 1.07 8.95 10.0 0.02 0.33 - 0.33 0.30 - 0.30 - 1,801 1,801 0.07 0.01 - 1,807 Equipment
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Average - - - - - - - - - - - - - - - - - Daily
Off-Road 0.56 4.67 5.24 0.01 0.17 - 0.17 0.16 - 0.16 - 941 941 0.04 0.01 - 944 Equipment
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Annual
Off-Road 0.10 0.85 0.96 < 0.005 0.03 - 0.03 0.03 - 0.03 - 156 156 0.01 <0.005 - 156 Equipment
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Offsite - - - - - - - - - - - - - - - - - Daily, - - - - - - - - - - - - - - - - - Summer
(Max)
Worker 0.07 0.07 1.25 0.00 0.00 0.21 0.21 0.00 0.05 0.05 - 225 225 0.01 0.01 0.84 229 Vendor <0.005 0.04 0.02 <0.005 <0.005 0.01 0.01 <0.005 <0.005 <0.005 - 39.3 39.3 <0.005 0.01 0.11 41.2 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Daily, - - - - - - - - - - - - - - Winter
(Max) Page 675 of 1374
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Worker 0.07 0.08 0.94 0.00 0.00 0.21 0.21 0.00 0.05 0.05 - 207 207 0.01 0.01 0.02 209 Vendor <0.005 0.05 0.02 <0.005 <0.005 0.01 0.01 <0.005 <0.005 <0.005 - 39.3 39.3 <0.005 0.01 <0.005 41.1 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Average - - - - - - - - - - - - - - - -Daily Worker 0.04 0.04 0.52 0.00 0.00 0.11 0.11 0.00 0.03 0.03 - 110 110 0.01 <0.005 0.19 111 Vendor <0.005 0.02 0.01 <0.005 <0.005 0.01 0.01 <0.005 <0.005 <0.005 - 20.5 20.5 <0.005 <0.005 0.03 21.5 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Annual - - - - - - - - - - - - - - - - - Worker 0.01 0.01 0.09 0.00 0.00 0.02 0.02 0.00 <0.005 <0.005 - 18.1 18.1 <0.005 <0.005 0.03 18.4 Vendor <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 - 3.40 3.40 <0.005 <0.005 <0.005 3.56 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00

3.7. Building Construction (2026) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location ROG NOx CO SO2 PM10E PM10D PM1OT PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N20 R CO2e Onsite - - - - - - - - - - - - - - - - - Daily, - - - - - - - - - - - - - - - - - Summer
(Max)
Off-Road 1.01 8.57 9.96 0.02 0.29 - 0.29 0.27 - 0.27 - 1,801 1,801 0.07 0.01 - 1,807 Equipment
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Daily, - - - - - - - - - - - - - - - - - Winter
(Max)
Off-Road 1.01 8.57 9.96 0.02 0.29 - 0.29 0.27 - 0.27 - 1,801 1,801 0.07 0.01 - 1,807 Equipment
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck

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Average - - - - -
Daily
Off-Road 0.47 3.97 4.62 0.01 0.14 - 0.14 0.12 - 0.12 - 835 835 0.03 0.01 - 838 Equipment
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Annual - - - - - - - - - - - - - - - - - Off-Road 0.09 0.73 0.84 < 0.005 0.02 - 0.02 0.02 - 0.02 - 138 138 0.01 <0.005 - 139 Equipment
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Offsite - - - - - - - - - - - - - - - Daily, - - - - - - - - - - - - - - - - - Summer
(Max)
Worker 0.07 0.06 1.15 0.00 0.00 0.21 0.21 0.00 0.05 0.05 - 221 221 0.01 0.01 0.76 224 Vendor <0.005 0.04 0.02 <0.005 <0.005 0.01 0.01 <0.005 <0.005 <0.005 - 38.6 38.6 <0.005 0.01 0.10 40.5 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Daily, - - - - - - - - - - - - - - - -Winter (Max)
Worker 0.06 0.07 0.87 0.00 0.00 0.21 0.21 0.00 0.05 0.05 - 203 203 <0.005 0.01 0.02 205 Vendor <0.005 0.04 0.02 <0.005 <0.005 0.01 0.01 <0.005 <0.005 <0.005 - 38.6 38.6 <0.005 0.01 <0.005 40.5 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Average - - - - - - - - - - - - - -Daily Worker 0.03 0.04 0.42 0.00 0.00 0.10 0.10 0.00 0.02 0.02 - 95.3 95.3 <0.005 <0.005 0.15 96.5 Vendor <0.005 0.02 0.01 <0.005 <0.005 0.01 0.01 <0.005 <0.005 <0.005 - 17.9 17.9 <0.005 <0.005 0.02 18.8 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Annual
Worker 0.01 0.01 0.08 0.00 0.00 0.02 0.02 0.00 <0.005 <0.005 - 15.8 15.8 <0.005 <0.005 0.03 16.0 Vendor <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 - 2.96 2.96 <0.005 <0.005 <0.005 3.11

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Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00

3.9. Paving (2026) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N20 R CO2e Onsite - - - - - - - - - - - - - - - - - Daily, - - - - - - - - - - - - - - - - - Summer
(Max)
Off-Road 0.47 4.41 6.48 0.01 0.18 - 0.18 0.17 - 0.17 - 991 991 0.04 0.01 - 995 Equipment
Paving 0.01 - - - - - - - - - - - - - - -Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Daily, - - - - - - - - - - - - - - - - - Winter
(Max)
Off-Road 0.47 4.41 6.48 0.01 0.18 - 0.18 0.17 - 0.17 - 991 991 0.04 0.01 - 995 Equipment
Paving 0.01 - - - - - - - - - - - - - - Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Average - - - - - - - - - - - - - - - - - Daily
Off-Road 0.10 0.94 1.38 < 0.005 0.04 - 0.04 0.04 - 0.04 - 212 212 0.01 <0.005 - 213 Equipment
Paving <0.005 - - - - - - - - - - - - - - - - Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Annual - - - - - - - - - - - - - - - - - Off-Road 0.02 0.17 0.25 <0.005 0.01 - 0.01 0.01 - 0.01 - 35.1 35.1 <0.005 <0.005 - 35.2 Equipment

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Paving <0.005 - - - - -
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Offsite
Daily, - - - - - - - - - - - - - - - - - Summer
(Max)
Worker 0.05 0.05 0.90 0.00 0.00 0.16 0.16 0.00 0.04 0.04 - 173 173 0.01 0.01 0.59 175 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Daily, - - - - - - - - - - - - - - - - - Winter
(Max)
Worker 0.05 0.05 0.68 0.00 0.00 0.16 0.16 0.00 0.04 0.04 - 158 158 <0.005 0.01 0.02 160 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Average - - - - - - - - - - - - Daily
Worker 0.01 0.01 0.15 0.00 0.00 0.03 0.03 0.00 0.01 0.01 - 34.3 34.3 <0.005 <0.005 0.05 34.8 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Annual - - - - - - - - - - - - - - - - - Worker <0.005 <0.005 0.03 0.00 0.00 0.01 0.01 0.00 <0.005 <0.005 - 5.68 5.68 <0.005 <0.005 0.01 5.75 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00

3.11 . Architectural Coating (2026) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location ROG NOx CO SO2 PM10E PM1OD PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N20 R CO2e Onsite -

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Daily, - -
Summer
(Max)
Off-Road 0.12 0.86 1.13 < 0.005 0.02 - 0.02 0.02 - 0.02 - 134 134 0.01 <0.005 - 134 Equipment
Architect 0.26 - - - - - - - - - - - - - - - - ural
Coatings
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Daily,
Winter
(Max)
Off-Road 0.12 0.86 1.13 < 0.005 0.02 - 0.02 0.02 - 0.02 - 134 134 0.01 <0.005 - 134 Equipment
Architect 0.26 - - - - - - - - - - - - - - - - ural
Coatings
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Average - - - - - - - - - - - - - - - - - Daily
Off-Road 0.05 0.38 0.51 <0.005 0.01 - 0.01 0.01 - 0.01 - 60.0 60.0 <0.005 <0.005 - 60.2 Equipment
Architect 0.12 - - - - - - - - - - - - - - - - ural
Coatings
Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Annual - - - - - - - - - - - - - - - - - Off-Road 0.01 0.07 0.09 < 0.005 <0.005 - <0.005 <0.005 - <0.005 - 9.93 9.93 <0.005 <0.005 - 9.97 Equipment
Architect 0.02 - - - - - - - - - - - - - - - - ural
Coatings

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Onsite 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 truck
Offsite
Daily,
Summer
(Max)
Worker 0.01 0.01 0.14 0.00 0.00 0.03 0.03 0.00 0.01 0.01 - 27.6 27.6 <0.005 <0.005 0.09 28.0 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Daily, - - - - - - - - - - - - - - - - - Winter
(Max)
Worker 0.01 0.01 0.11 0.00 0.00 0.03 0.03 0.00 0.01 0.01 - 25.3 25.3 <0.005 <0.005 <0.005 25.6 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Average - - - - - - - - -
Daily
Worker <0.005 <0.005 0.05 0.00 0.00 0.01 0.01 0.00 <0.005 <0.005 - 11.5 11.5 <0.005 <0.005 0.02 11.7 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Annual - - - - - - - - - - - - - - - - - Worker <0.005 <0.005 0.01 0.00 0.00 <0.005 <0.005 0.00 <0.005 <0.005 - 1.91 1.91 <0.005 <0.005 <0.005 1.94 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00

4. Operations Emissions Details

4.1 . Mobile Emissions by Land Use

4.1.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Page 681 of 1374 20/35

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Land ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Use
Daily, - - - - - - -
Summer
(Max)
Governm 0.32 0.39 3.87 0.01 0.01 0.89 0.90 0.01 0.23 0.23 - 1,042 1,042 0.04 0.04 3.59 1,060 ent
Office
Building
Automob 0.05 0.06 0.64 <0.005 <0.005 0.15 0.15 <0.005 0.04 0.04 - 171 171 0.01 0.01 0.59 174 ile
Care
Center
Parking 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Lot
Total 0.37 0.45 4.51 0.01 0.01 1.04 1.05 0.01 0.26 0.27 - 1,214 1,214 0.05 0.05 4.18 1,234 Daily, - - - - - - - - - - - - - - - - - Winter
(Max)
Governm 0.30 0.42 3.15 0.01 0.01 0.89 0.90 0.01 0.23 0.23 - 976 976 0.04 0.05 0.09 991 ent
Office
Building
Automob 0.05 0.07 0.52 <0.005 <0.005 0.15 0.15 <0.005 0.04 0.04 - 160 160 0.01 0.01 0.02 163 ile
Care
Center
Parking 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Lot
Total 0.35 0.49 3.66 0.01 0.01 1.04 1.05 0.01 0.26 0.27 - 1,137 1,137 0.05 0.05 0.11 1,154 Annual - - - - - - - - - - - - - - - - - Governm 0.05 0.08 0.60 <0.005 <0.005 0.16 0.16 <0.005 0.04 0.04 - 163 163 0.01 0.01 0.26 166 ent
Office
Building

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Automob 0.01 0.01 0.10 < 0.005 <0.005 0.03 0.03 <0.005 0.01 0.01 - 26.8 26.8 <0.005 <0.005 0.04 27.3 ile
Care
Center
Parking 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 0.00 0.00 0.00 0.00 Lot
Total 0.06 0.09 0.70 <0.005 <0.005 0.19 0.19 <0.005 0.05 0.05 - 190 190 0.01 0.01 0.30 193

4.2. Energy

4.2.1. Electricity Emissions By Land Use - Unmitigated
Criteria Pollutants (Ib/day for daily, ton/yr for annual) and GHGs (Ib/day for daily, MT/yr for annual) Land ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Use
Daily, - - - - - - - - - - - - - - - - - Summer
(Max)
Governm - - - - - - - - - - - 137 137 0.01 <0.005 - 138 ent
Office
Building
Automob - - - - - - - - - - - 131 131 0.01 <0.005 - 132 ile
Care
Center
Parking - - - - - - - - - - - 66.1 66.1 <0.005 <0.005 - 66.3 Lot
Total - - - - - - - - - - - 335 335 0.02 <0.005 - 336 Daily, - - - - - - - - - - - - - Winter
(Max)
Governor - - - - - - - - - - - 137 137 0.01 <0.005 - 138 ent
Office
Building

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Automob - - - - - - - - - - - 131 131 0.01 <0.005 - 132 Care
Center
Parking - - - - - - - - - - - 66.1 66.1 <0.005 <0.005 - 66.3 Lot
Total - - - - - - - - - - - 335 335 0.02 <0.005 - 336 Annual - - - - - - - - - - - - - - - - - Governm - - - - - - - - - - - 22.7 22.7 <0.005 <0.005 - 22.8 ent
Office
Building
Automob - - - - - - - - - - - 21.8 21.8 <0.005 <0.005 - 21.8 ile
Care
Center
Parking - - - - - - - - - - - 10.9 10.9 <0.005 <0.005 - 11.0 Lot
Total - - - - - - - - 55.4 55.4 <0.005 <0.005 - 55.7

4.2.3. Natural Gas Emissions By Land Use - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Use
Daily, - - - - - - - - - - - - - - - - - Summer
(Max)
Governm 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 0.00 0.00 0.00 0.00 - 0.00 ent
Office
Building
Automob 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 0.00 0.00 0.00 0.00 - 0.00 ile
Care
Center
Parking 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 0.00 0.00 0.00 0.00 - 0.00 Lot Page 684 of 1374
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Total 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 0.00 0.00 0.00 0.00 - 0.00 Daily, - - -
Winter
(Max)
Governm 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 0.00 0.00 0.00 0.00 - 0.00 ent
Office
Building
Automob 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 0.00 0.00 0.00 0.00 - 0.00 ile
Care
Center
Parking 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 0.00 0.00 0.00 0.00 - 0.00 Lot
Total 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 0.00 0.00 0.00 0.00 - 0.00 Annual - - - - - - - - - - - - - - - - - Governm 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 0.00 0.00 0.00 0.00 - 0.00 ent
Office
Building
Automob 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 0.00 0.00 0.00 0.00 - 0.00 ile
Care
Center
Parking 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 0.00 0.00 0.00 0.00 - 0.00 Lot
Total 0.00 0.00 0.00 0.00 0.00 - 0.00 0.00 - 0.00 - 0.00 0.00 0.00 0.00 - 0.00

4.3. Area Emissions by Source

4.3.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Source ROG NOx CO SO2 PM1OE PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N20 R CO2e

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Daily, - - - - - -
Summer
(Max)
Consum 0.17
er
Products
Architect 0.01 - - - - - - - - - - - - - - - - ural
Coatings
Landsca 0.06 < 0.005 0.34 < 0.005 <0.005 - <0.005 <0.005 - <0.005 - 1.39 1.39 <0.005 <0.005 - 1.39 pe
Equipme
nt
Total 0.24 < 0.005 0.34 < 0.005 <0.005 - <0.005 < 0.005 - <0.005 - 1.39 1.39 <0.005 <0.005 - 1.39 Daily, - - - - - - - - - - - - - - - - - Winter
(Max)
Consum 0.17 - - -
er
Products
Architect 0.01 - - - - - - - - - - - - - - - - ural
Coatings
Total 0.18 - - - - - - - - - - - - - - - - Annual - - - - - - - - -
Consum 0.03 - - - - - - - - - -
er
Products
Architect <0.005 - - - - - - - - - - - - - - - ural
Coatings
Landsca 0.01 < 0.005 0.04 <0.005 <0.005 - <0.005 <0.005 - <0.005 - 0.16 0.16 <0.005 <0.005 - 0.16 pe
Equipme
nt
Total 0.04 < 0.005 0.04 < 0.005 <0.005 - <0.005 <0.005 - <0.005 - 0.16 0.16 <0.005 <0.005 - 0.16

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4.4. Water Emissions by Land Use

4.4.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Use
Daily, - - - - - - - - - - - - - - - - - Summer
(Max)
Governm - - - - - - - - - - 1.41 10.5 11.9 0.15 <0.005 - 16.6 ent
Office
Building
Automob - - - - - - - - - - 0.73 6.28 7.01 0.08 <0.005 - 9.45 ile
Care
Center
Parking - - - - - - - - - - 0.00 0.00 0.00 0.00 0.00 - 0.00 Lot
Total - - - - - - - - - - 2.14 16.8 18.9 0.22 0.01 - 26.1 Daily, - - - - - - - - - - - - - - - - - Winter
(Max)
Governm - - - - 1.41 10.5 11.9 0.15 <0.005 - 16.6 ent
Office
Building
Automob - - - - - - - - - - 0.73 6.28 7.01 0.08 <0.005 - 9.45 ile
Care
Center
Parking - - - - - 0.00 0.00 0.00 0.00 0.00 - 0.00 Lot
Total - - - - - - - - - - 2.14 16.8 18.9 0.22 0.01 - 26.1 Annual - - - - - - - - - - - - - -

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Governm - - - - - - - - - - 0.23 1.74 1.98 0.02 <0.005 - 2.75 Office
Building
Automob - - - - - - - - - - 0.12 1.04 1.16 0.01 <0.005 - 1.56 ile
Care
Center
Parking - - - - - - - - - - 0.00 0.00 0.00 0.00 0.00 - 0.00 Lot
Total - - - - - - - - - - 0.35 2.78 3.14 0.04 <0.005 - 4.31

4.5. Waste Emissions by Land Use

4.5.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Use
Daily, - - - - - - - - - - - - - - - - - Summer
(Max)
Governm - - - - - - - - - - 1.85 0.00 1.85 0.19 0.00 - 6.48 ent
Office
Building
Automob - - - - - - - - - - 8.37 0.00 8.37 0.84 0.00 - 29.3 ile
Care
Center
Parking - - - - - - - - - - 0.00 0.00 0.00 0.00 0.00 - 0.00 Lot
Total - - - - - - - - - - 10.2 0.00 10.2 1.02 0.00 - 35.8 Daily, - - - - - - - - - - - - - - - - - Winter
(Max)

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Governm - - - - - - - - - - 1.85 0.00 1.85 0.19 0.00 - 6.48 ent
Automob - - - - - - - - - - 8.37 0.00 8.37 0.84 0.00 - 29.3 ile
Care
Center
Parking - - - - - - - - - - 0.00 0.00 0.00 0.00 0.00 - 0.00 Lot
Total - - - - - - - - - - 10.2 0.00 10.2 1.02 0.00 - 35.8 Annual - - - - - - - - - -
Governm - - - - - - - - 0.31 0.00 0.31 0.03 0.00 - 1.07 ent
Office
Building
Automob - - - - - - - - - - 1.39 0.00 1.39 0.14 0.00 - 4.85 ile
Care
Center
Parking - - - - - - - - - - 0.00 0.00 0.00 0.00 0.00 - 0.00 Lot
Total - - - - - - - - - - 1.69 0.00 1.69 0.17 0.00 - 5.92

4.6. Refrigerant Emissions by Land Use

4.6.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Use
Daily, - - - - - - - - - - - - - - - Summer
(Max)
Governm - - - - - - - - - - - - - - - 0.01 0.01 ent
Office
Building

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Automob — — — — — — — 843 843
Care
Center
Total — — — — — — 843 843 Daily, — — — — — — — — — — — — — — — —Winter (Max)
Governor — — — — — — — — — — — — — — — 0.01 0.01 ent
Office
Building
Automob — — — — — — — — — — — 843 843 ile
Care
Center
Total — — — — — — — — — — — — — — — 843 843 Annual — — — — — — — — — — — — — — — — — Governm — — — — — — — — — — — — — — — <0.005 <0.005 ent
Office
Building
Automob — — — — — — — — — — — — — — — 140 140 ile
Care
Center
Total — — — — — — — — — — — — 140 140

5. Activity Data

5.1 . Construction Schedule
Phase Name Phase Type Start Date End Date Days Per Week Work Days per Phase Phase Description Site Preparation Site Preparation 4/1/2025 4/2/2025 5.00 2.00 — Grading Grading 4/3/2025 4/8/2025 5.00 4.00 — Building Construction Building Construction 4/9/2025 8/25/2026 5.00 360 Page 690 of 1374 29/35

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Paving Paving 8/26/2026 12/11/2026 5.00 78.0 Architectural Coating Architectural Coating 3/1/2026 10/15/2026 5.00 164

5.2. Off-Road Equipment

5.2.1. Unmitigated
Phase Name Equipment Type Fuel Type Engine Tier Number per Day Hours Per Day Horsepower Load Factor Site Preparation Graders Diesel Average 1.00 8.00 148 0.41 Site Preparation Rubber Tired Dozers Diesel Average 1.00 7.00 367 0.40 Site Preparation Tractors/Loaders/Back Diesel Average 1.00 8.00 84.0 0.37 hoes
Grading Graders Diesel Average 1.00 8.00 148 0.41 Grading Rubber Tired Dozers Diesel Average 1.00 8.00 367 0.40 Grading Tractors/Loaders/Back Diesel Average 2.00 7.00 84.0 0.37 hoes
Building Construction Cranes Diesel Average 1.00 6.00 367 0.29 Building Construction Forklifts Diesel Average 1.00 6.00 82.0 0.20 Building Construction Generator Sets Diesel Average 1.00 8.00 14.0 0.74 Building Construction Tractors/Loaders/Back Diesel Average 1.00 6.00 84.0 0.37 hoes
Building Construction Welders Diesel Average 3.00 8.00 46.0 0.45 Paving Cement and Mortar Diesel Average 1.00 6.00 10.0 0.56 Mixers
Paving Pavers Diesel Average 1.00 6.00 81.0 0.42 Paving Paving Equipment Diesel Average 1.00 8.00 89.0 0.36 Paving Rollers Diesel Average 1.00 7.00 36.0 0.38 Paving Tractors/Loaders/Back Diesel Average 1.00 8.00 84.0 0.37 hoes
Architectural Coating Air Compressors Diesel Average 1.00 6.00 37.0 0.48

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5.3. Construction Vehicles

5.3.1. Unmitigated
Phase Name Trip Type One-Way Trips per Day Miles per Trip Vehicle Mix Site Preparation — — — —
Site Preparation Worker 7.50 18.5 LDA,LDT1,LDT2 Site Preparation Vendor — 10.2 HHDT,MHDT Site Preparation Hauling 0.00 20.0 HHDT Site Preparation Onsite truck — — HHDT Grading — — — —
Grading Worker 10.0 18.5 LDA,LDT1,LDT2 Grading Vendor — 10.2 HHDT,MHDT Grading Hauling 0.00 20.0 HHDT Grading Onsite truck — — HHDT
Building Construction — — — —
Building Construction Worker 16.0 18.5 LDA,LDT1,LDT2 Building Construction Vendor 1.27 10.2 HHDT,MHDT Building Construction Hauling 0.00 20.0 HHDT Building Construction Onsite truck — — HHDT Paving — — — —
Paving Worker 12.5 18.5 LDA,LDT1,LDT2 Paving Vendor — 10.2 HHDT,MHDT Paving Hauling 0.00 20.0 HHDT Paving Onsite truck — — HHDT
Architectural Coating — — — —
Architectural Coating Worker 2.00 18.5 LDA,LDT1,LDT2 Architectural Coating Vendor — 10.2 HHDT,MHDT Architectural Coating Hauling 0.00 20.0 HHDT

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Architectural Coating Onsite truck — — HHDT

5.4. Vehicles

5.4.1. Construction Vehicle Control Strategies
Control Strategies Applied PM10 Reduction PM2.5 Reduction Water unpaved roads twice daily 55% 55% Limit vehicle speeds on unpaved roads to 25 mph 44% 44% Sweep paved roads once per month 9% 9%

5.5. Architectural Coatings
Phase Name Residential Interior Area Residential Exterior Area Non-Residential Interior Area Non-Residential Exterior Area Parking Area Coated (sq ft) Coated (sq ft) Coated (sq ft) Coated (sq ft) Coated (sq ft) Architectural Coating 0.00 0.00 11,646 3,882 3,104

5.6. Dust Mitigation

5.6.1. Construction Earthmoving Activities
Phase Name Material Imported (Cubic Material Exported (Cubic Acres Graded (acres) Material Demolished (sq.ft.) Acres Paved (acres) Yards) Yards)
Site Preparation 0.00 0.00 1.88 0.00 — Grading 0.00 0.00 4.00 0.00 — Paving 0.00 0.00 0.00 0.00 1.19

5.6.2. Construction Earthmoving Control Strategies
Control Strategies Applied Frequency(per day) PM10 Reduction PM2.5 Reduction Water Exposed Area 3 74% 74%

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5.7. Construction Paving
Land Use Area Paved (acres) %Asphalt Government Office Building 0.00 0%
Automobile Care Center 0.00 0%
Parking Lot 1.19 36%

5.8. Construction Electricity Consumption and Emissions Factors kWh per Year and Emission Factor (Ib/MWh)
Year kWh per Year CO2 CH4 N20 2025 0.00 532 0.03 <0.005 2026 0.00 532 0.03 <0.005

5.9. Operational Mobile Sources

5.9.1. Unmitigated
Land Use Type Trips/Weekday Trips/Saturday Trips/Sunday Trips/Year VMT/Weekday VMT/Saturday VMT/Sunday VMT/Year Government Office 73.0 73.0 73.0 26,644 1,258 1,258 1,258 459,062 Building
Automobile Care 12.0 12.0 12.0 4,378 207 207 207 75,430 Center
Parking Lot 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

5.10. Operational Area Sources

5.10.2. Architectural Coatings
Residential Interior Area Coated(sq Residential Exterior Area Coated (sq Non-Residential Interior Area Coated Non-Residential Exterior Area Parking Area Coated (sq ft) ft) ft) (sq ft) Coated (sq ft)
0 0.00 11,646 3,882 3,104

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5.10.3. Landscape Equipment
Season Unit Value
Snow Days day/yr 0.00
Summer Days day/yr 250

5.11 . Operational Energy Consumption

5.11.1. Unmitigated
Electricity (kWh/yr) and CO2 and CH4 and N20 and Natural Gas (kBTU/yr) Land Use Electricity(kWh/yr) CO2 CH4 N20 Natural Gas(kBTU/yr) Government Office Building 94,277 532 0.0330 0.0040 0.00 Automobile Care Center 90,187 532 0.0330 0.0040 0.00 Parking Lot 45,321 532 0.0330 0.0040 0.00

5.12. Operational Water and Wastewater Consumption

5.12.1. Unmitigated
Land Use Indoor Water(gal/year) Outdoor Water(gal/year) Government Office Building 734,644 418,774 Automobile Care Center 382,534 321,182
Parking Lot 0.00 0.00

5.13. Operational Waste Generation

5.13.1. Unmitigated
Land Use Waste(ton/year) Cogeneration (kWh/year) Government Office Building 3.44 —

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Automobile Care Center 15.5 Parking Lot 0.00

5.14. Operational Refrigeration and Air Conditioning Equipment

5.14.1. Unmitigated
Land Use Type Equipment Type Refrigerant GWP Quantity(kg) Operations Leak Rate Service Leak Rate Times Serviced Government Office Household R-134a 1,430 0.02 0.60 0.00 1.00 Building refrigerators and/or
freezers
Government Office Other commercial A/C R-410A 2,088 <0.005 4.00 4.00 18.0 Building and heat pumps
Automobile Care Other commercial A/C R-410A 2,088 <0.005 4.00 4.00 18.0 Center and heat pumps
Automobile Care Supermarket R-404A 3,922 26.5 16.5 16.5 18.0 Center refrigeration and
condensing units

8. User Changes to Default Data
Screen Justification
Construction: Construction Phases No demolition planned. Construction from 4/25 thru 12/26.Assumed architectural coatings applied during the building construction and paving phases.

Construction:Architectural Coatings Assume all architectural coatings comply with SCAQMD Rule 1113.

Construction: Paving Project plans specify 33,312sf of concrete and 18,424sf of asphalt.

Operations:Vehicle Data Trip rates per traffic study-20 employee, 12 maintenance truck, and 53 customer trips per day.

Assigned all employee and customer trips to the Govt Office Bldg.

Operations:Architectural Coatings Assumed all architectural coatings comply with SCAQMD Rule 1113.

Construction: Trips and VMT Adjusted worker trips from defaults to expected amounts.

Operations: Energy Use No natural gas use allowed, adjusted electricity use up to compensate. Used 1 kWh =3,412 BTU of natural gas.

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AIR QUALITY AND GREE.NHOLISE GAS TECHNICAL MEMORANDUM SAN ANTONIO WATER HEADQUARTERS [A NOVEMBER 2024 UPLANO,CALIFORNIA 'll7

ATTACHMENT C

FONTANA-ARROW HIGHWAY AIR QUALITY MONITORING DATA
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LSA Associates,Inc. Fontana-Arrow Highway Air Quality Monitoring Data 20241723 2021 Monitoring Data
First Second Third Fourth
Duration Arithmetic Maximum Maximum Maximum Maximum 50th 75th 90th 95th 98th 99th Parameter Name Description Pollutant Standard Units of Measure Mean Value Value Value Value Perecentile Perecentile Perecentile Perecentile Perecentile Perecentile Address Carbon monoxide 1 HOUR CO 1-hour 1971 Parts per million 0.283842 1.9 1.9 1.7 1.5 0.2 0.4 0.6 0.7 0.9 1 14360 ARROW BLVD.,FONTANA Carbon monoxide 8-HR RUN AVG 1 CO 8-hour 1971 Parts per million 0.287105 1.4 1.4 1.3 1.3 0.2 0.4 0.6 0.7 0.8 0.9 14360 ARROW BLVD.,FONTANA Nitrogen dioxide(NO2) 1 HOUR NO2 1-hour2010 Parts per billion 34.070879 67.2 64.6 61.7 61.1 34.7 41.1 49.4 53.6 60.7 61.1 14360 ARROW BLVD.,FONTANA Nitrogen dioxide(NO2) 1 HOUR NO2 Annual 1971 Parts per billion 18.951218 67.2 64.6 62.1 61.7 16.5 27.8 35.9 40.1 45.9 49.8 14360 ARROW BLVD.,FONTANA Ozone 1 HOUR Ozone 1-hour 1979 Parts per million 0.06264 0.125 0.123 0.122 0.122 0.057 0.081 0.098 0.107 0.118 0.122 14360 ARROW BLVD.,FONTANA Ozone 8-HR RUN AVG 1 Ozone 8-hour 2015 Parts per million 0.052427 0.103 0.101 0.101 0.099 0.05 0.069 0.081 0.089 0.094 0.099 14360 ARROW BLVD.,FONTANA PM10 Total 0-10um STP 24 HOUR PM10 24-hour2006 Micrograms/cubic n 32.886792 73 62 61 52 33 41 49 61 62 73 14360 ARROW BLVD.,FONTANA PM2.5-LocalConditions 24HOUR PM25 24-hour 2012 Micrograms/cubicn 12.0975 55.1 43.7 33.4 33.4 11.3 14.2 16.9 29.4 33.4 43.7 14360 ARROW BLVD.,FONTANA PM2.5-LocalConditions 24HOUR PM25 Annual 2012 Micrograms/cubicn 12.0975 55.1 43.7 33.4 33.4 11.3 14.2 16.9 29.4 33.4 43.7 14360 ARROW BLVD.,FONTANA Sulfur dioxide 1HOUR SO2 1-hour2010 Parts per billion 0.552198 5 3.7 2.7 1.9 0.6 0.8 1 1.2 1.5 1.9 14360 ARROW BLVD.,FONTANA Sulfur dioxide 3-HRBLKAVG SO2 3-hour1971 Parts per billion 0.231348 2.7 2 1.5 1.2 0.3 0.4 0.6 0.7 0.8 0.9 14360 ARROW BLVD.,FONTANA 2022 Monitoring Data
First Second Third Fourth
Duration Arithmetic Maximum Maximum Maximum Maximum 50th 75th 90th 95th 98th 99th Parameter Name Description Pollutant Standard Units of Measure Mean Value Value Value Value Perecentile Perecentile Perecentile Perecentile Perecentile Perecentile Address Carbon monoxide 1 HOUR CO 1-hour 1971 Parts per million 0.259474 1.6 1.5 1.5 1.3 0.2 0.3 0.5 0.6 0.8 0.9 14360 ARROW BLVD.,FONTANA Carbon monoxide 8-HR RUN AVG I CO 8-hour 1971 Parts per million 0.263678 1.0 1.0 1.0 1.0 0.2 0.3 0.5 0.5 0.6 0.7 14360 ARROW BLVD.,FONTANA Nitrogen dioxide(NO2) 1 HOUR NO2 1-hour2010 Parts per billion 32.215042 68.7 55 53.2 52.5 33.8 40.1 45.2 48.7 50.5 52.5 14360 ARROW BLVD.,FONTANA Nitrogen dioxide(NO2) 1 HOUR NO2 Annual 1971 Parts per billion 17.701232 68.7 55 53.2 52.8 15.3 26.4 34.1 37.9 41.7 44.2 14360 ARROW BLVD.,FONTANA Ozone 1 HOUR Ozone 1-hour 1979 Parts per million 0.064081 0.144 0.122 0.121 0.119 0.06 0.083 0.098 0.106 0.115 0.119 14360 ARROW BLVD.,FONTANA Ozone 8-HR RUN AVG I Ozone 8-hour 2015 Parts per million 0.053432 0.107 0.099 0.098 0.095 0.051 0.067 0.079 0.084 0.094 0.095 14360 ARROW BLVD.,FONTANA PM10 Total 0-10um STP 24 HOUR PM10 24-hour2006 Micrograms/cubic n 31.533333 62 62 60 58 29 43 53 60 62 62 14360 ARROW BLVD.,FONTANA PM2.5-Local Conditions 24 HOUR PM25 24-hour2012 Micrograms/cubicn 10.915833 38.1 30.6 28.1 22.4 10.1 13.5 17.9 20.4 28.1 30.6 14360 ARROW BLVD.,FONTANA PM2.5-Local Conditions 24 HOUR PM25 Annual2012 Micrograms/cubicn 10.915833 38.1 30.6 28.1 22.4 10.1 13.5 17.9 20.4 28.1 30.6 14360 ARROW BLVD.,FONTANA Sulfur dioxide 1HOUR SO2 1-hour2010 Parts per billion 0.761143 2.7 2.4 2.1 1.9 0.7 0.9 1.2 1.4 1.7 2.1 14360 ARROW BLVD.,FONTANA Sulfur dioxide 3-HR BLK AVG SO2 3-hour 1971 Parts per billion 0.431421 2.1 1.8 1.4 1.3 0.4 0.6 0.7 0.8 0.9 1 14360 ARROW BLVD.,FONTANA 2023 Monitoring Data
First Second Third Fourth
Duration Arithmetic Maximum Maximum Maximum Maximum 50th 75th 90th 95th 98th 99th Parameter Name Description Pollutant Standard Units of Measure Mean Value Value Value Value Perecentile Perecentile Perecentile Perecentile Perecentile Perecentile Address Carbon monoxide 1 HOUR CO 1-hour 1971 Parts per million 0.199884 1.5 1.4 1.3 1.3 0.1 0.3 0.4 0.6 0.7 0.8 14360 ARROW BLVD.,FONTANA Carbon monoxide 8-HR RUN AVG 1 CO 8-hour 1971 Parts per million 0.204426 1.0 1.0 1.0 0.9 0.2 0.3 0.4 0.5 0.6 0.7 14360 ARROW BLVD.,FONTANA Nitrogen dioxide(NO2) 1 HOUR NO2 1-hour2010 Parts per billion 30.390503 63.2 59.6 58.4 57.8 30.8 37.6 44.8 50.5 54.5 57.8 14360 ARROW BLVD.,FONTANA Nitrogen dioxide(NO2) 1 HOUR NO2 Annual 1971 Parts per billion 16.59102 63.2 61.5 59.6 58.4 13.8 24.3 32.5 36.6 41.3 45.4 14360 ARROW BLVD.,FONTANA Ozone 1 HOUR Ozone 1-hour 1979 Parts per million 0.062239 0.131 0.13 0.124 0.121 0.054 0.083 0.102 0.111 0.118 0.121 14360 ARROW BLVD.,FONTANA Ozone 8-HR RUN AVG 1 Ozone 8-hour 2015 Parts per million 0.052491 0.111 0.107 0.106 0.105 0.047 0.068 0.083 0.091 0.099 0.105 14360 ARROW BLVD.,FONTANA PM10 Total 0-10um STP 24 HOUR PM10 24-hour 2006 Micrograms/cubic n 33.068966 132 103 58 58 30 42 54 58 103 132 14360 ARROW BLVD.,FONTANA PM2.5-Local Conditions 24 HOUR PM25 24-hour2012 Micrograms/cubicn 11.243697 101.1 27.3 25 22.7 9.7 12.8 17.2 19.8 25 27.3 14360 ARROW BLVD.,FONTANA PM2.5-Local Conditions 24 HOUR PM25 Annual2012 Micrograms/cubicn 11.243697 101.1 27.3 25 22.7 9.7 12.8 17.2 19.8 25 27.3 14360 ARROW BLVD.,FONTANA Sulfur dioxide 1HOUR SO2 1-hour2010 Parts per billion 0.440169 3.3 3 1.4 1.4 0.4 0.6 0.8 1 1.2 1.4 14360 ARROW BLVD.,FONTANA Sulfur dioxide 3-HR BLK AVG SO2 3-hour 1971 Parts per billion 0.201126 2.9 1.5 1.4 1.2 0.2 0.3 0.5 0.5 0.7 0.8 14360 ARROW BLVD.,FONTANA

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L A SAN ANTONIO WATER COMPANY HEADQUARTERS PROJECT INITIAL STUDY/MITIGATED NEGATIVE DECLARATION r`. UPLAND,CALIFORNIA AUGUST 2025
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I NITIRL STUDYJNIITISATEO NEGATIVE DECLARATION SAN ANT ON I WATER COMPANY HEADQUARTERS PRo ECT ` s A AususT 2025 UPLAND,CALIFORNIA r`.

APPENDIX B

BIOLOGICAL RESOURCES ASSESSMENT
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BIOLOGICAL RESOURCES ASSESSMENT

SAN ANTONIO WATER COMPANY HEADQUARTERS

UPLAND, SAN BERNARDINO COUNTY, CALIFORNIA
(APN 1044-091-22)
L SA
September 2024

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BIOLOGICAL RESOURCES ASSESSMENT

SAN ANTONIO WATER COMPANY HEADQUARTERS

UPLAND, SAN BERNARDINO COUNTY, CALIFORNIA
(APN 1044-091-22)
Submitted to:

Brian C. Lee, General Manager
San Antonio Water Company
139 North Euclid Avenue
Upland, California 91786
Prepared by:

LSA Associates, Inc.
1500 Iowa Avenue, Suite 200
Riverside, California 92507
(951) 781-9310
Project No. 20241723
L SA
September 2024

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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L C A SEPTEMBER 2024 UPLAND,CALIFORNIA J/(-`

TABLE OF CONTENTS

TABLE OF CONTENTS
LIST OF ABBREVIATIONS AND ACRONYMS ii
INTRODUCTION 1
Site Description 1
METHODS 2
Literature Review 2
Reconnaissance Field Survey 3
RESULTS 4
Existing Site Conditions 4
Topography and Soils 4
Vegetation and Land Cover 4
Wetlands and Other Jurisdictional Waters 5
Wildlife 6
Special-Status Species 6
IMPACT FINDINGS 22
Vegetation and Habitat Impacts 22
Threatened and Endangered Species 22
Non-Listed Special-Status Species 22
Nesting Birds 23
Wildlife Movement, Corridors, and Nursery Sites 24 Local Tree Ordinance 24
REFERENCES 25
TABLES
Table A: Mapped Soils Classification 4
Table B: Mapped Vegetation/Land Cover Classifications 5 Table C: Special-Status Species Occurrence Probability 7

APPENDICES
A: FIGURES 1-5
B: VASCULAR PLANT SPECIES OBSERVED
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L SA SEPTEMBER 2024 UPLAND, CALIFORNIA

LIST OF ABBREVIATIONS AND ACRONYMS
APN Assessor's Parcel Number
BRA Biological Resources Assessment
CDFW California Department of Fish and Wildlife
CEQA California Environmental Quality Act
CESA California Endangered Species Act
City City of Upland
CNDDB California Natural Diversity Database
CNPS California Native Plant Society
CWA Clean Water Act
IPaC Information for Planning and Consultation
NRCS Natural Resources Conservation Service
Project San Antonio Water Company Headquarters Project RWQCB Regional Water Quality Control Board
SAWCO San Antonio Water Company
USACE United States Army Corps of Engineers
USFWS United States Fish and Wildlife Service
USGS United States Geological Survey
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L SA SEPTEMBER 2024 UPLAND, CALIFORNIA

INTRODUCTION
The following Biological Resources Assessment (BRA)technical report prepared by LSA&Associates, and in accordance with the California Environmental Quality Act (CEQA), includes a description of the biological resources present or with the potential to occur within the proposed San Antonio Water Company(SAWCO) Headquarters Project (Project) and surrounding areas, and analyzes potential Project-related impacts to protected species and associated habitats.

SITE DESCRIPTION
The Project is located at 400 East 20th Street, on Assessor's Parcel Numbers (APN) 1044-091-22- 0000 in Upland, San Bernardino County, California (Figure 1; all figures are provided in Appendix A).

The Project would result in the construction of a new 3,698 square-foot SAWCO headquarters and associated improvements including a 4,066 square-foot maintenance building, maintenance yard, driveway, parking, solar cover, citrus grove, and ornamental landscaping on approximately 4.92 acres of SAWCO property(refer to Figure 2).

The Project site is located in northwest Upland in an area primarily consisting of residential, commercial, and industrial uses.The Project site is bound by East 20th Street to the north, undeveloped open space to the east, State Route 210 (SR-210)to the south, and Flower Court to the west.
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L SA SEPTEMBER 2024 UPLAND, CALIFORNIA

METHODS

LITERATURE REVIEW
A literature review and record search were conducted in July 2024 to identify the existence and potential for occurrence of sensitive or special-status plant and animal species in the Project vicinity.

A thorough search of the databases for published accounts of special-status plant and animal species was conducted for the Mount Baldy 7.5-minute quadrangle that contains the Project, and for the three surrounding quadrangles: Cucamonga Peak, Guasti, and Ontario. Federal and State lists of sensitive species were also examined. Current electronic database records reviewed included the following:
• California Natural Diversity Database information (CNDDB—RareFind 5) (California Department of Fish and Wildlife [CDFW] 2024), which is administered by the CDFW,formerly known as the California Department of Fish and Game.This database covers sensitive plant and animal species, as well as sensitive natural communities that occur in California. • California Native Plant Society's (CNPS) Electronic Inventory of Rare and Endangered Vascular Plants (CNPS 2024), which uses four specific categories or "lists" of sensitive plant species to assist with the conservation of rare or endangered botanical resources. All of the plants constituting California Rare Plant Ranks 1A, 1B, 2A, and 2B are intended to meet the status definitions of"threatened" or"endangered" in the California Endangered Species Act(CESA) and the California Fish and Game Code and are considered by CNPS to be eligible for State listing. At the discretion of the CEQA Lead Agency, impacts to these species may be analyzed as such, pursuant to State CEQA Guidelines Sections 15125(c) and 15380. Plants in Rank 3 (limited information; review list), Rank 4 (limited distribution; watch list), or that are considered Locally Unusual and Significant may be analyzed under CEQA if there is sufficient information to assess potential significant impacts.
• United States Fish and Wildlife Service's (USFWS) Information for Planning and Consultation (IPaC) Online System (USFWS 2024a), which lists all proposed, candidate,threatened, and endangered species managed by the USFWS Endangered Species Program that have the potential to occur on or near a particular site.This database also lists all known critical habitats, national wildlife refuges, and migratory birds that could potentially be impacted by activities from a proposed project. An IPaC resource report was generated for the Project.

In addition to the databases listed above, historic and current aerial imagery, existing environmental reports for developments in the Project vicinity, and regional habitat conservation plans, and local land use policies related to biological resources were reviewed. Wetland resources including riparian corridors were determined using the USFWS Wetlands Mapper online edition (USFWS 2024d). Soil types were determined using the United States Department of Agriculture Natural Resources Conservation Service (NRCS)WebSoil Survey(NRCS 2024).
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L SA SEPTEMBER 2024 UPLAND, CALIFORNIA

RECONNAISSANCE FIELD SURVEY
LSA Biologist Chrissy Kent conducted a general reconnaissance-level, pedestrian field survey on July 19, 2024, from 7:40 a.m.to 9:00 a.m. Weather conditions during the survey consisted of clear, sunny skies, with a temperature ranging from 76 to 81 degrees Fahrenheit and a light breeze of 2 to 5 miles per hour.All areas within the approximate 4.92-acre Project site were surveyed on foot, using binoculars to assist in identifying species present. Observations on general site conditions, vegetation, and habitat suitability for various special-status elements were recorded, and a list of observed and detected plant and animal species is provided in Appendix B. \\aznasunifilerl\projects\20241723_Sen Antonio Driveway Expansion\PRODUCTS\Technical Studies\Biological Resources\Draft Report\20241723_SAWH_BRA_Report.door(09/03/24) 3

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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L SA SEPTEMBER 2024 UPLAND, CALIFORNIA

RESULTS

EXISTING SITE CONDITIONS
The parcel is composed of existing developments including an underground one-million-gallon water storage tank located at the northwestern corner, a pump station located at the southwestern corner, and a signal building and tower located at the southeastern corner.Approximately five SAWCO employees within the Operations Department use the Project site on a daily basis for equipment and material storage.The existing water storage tank, pump station, and signal buildings and tower would remain in place.

The site is bordered by developed areas to the north, west, and south. Residential communities surround the north and west sides, while the south side features a developed roadway—Route 210, Foothill freeway. Directly adjacent to the Project site to the east is an undeveloped open space owned by Southern California Edison Company;this vacant lot connects to East 20th Street and is next to Holliday Rock, a ready-mix concrete supplier.The site itself primarily consists of nonnative, disturbed vegetation.The following sections discuss topography and soils,vegetation, and wildlife within the Project site.

Topography and Soils
The topography of the Project site is relatively level, with a slope of 3.9 percent and elevations ranging from 1,634 to 1,659 feet above mean sea level.

Three soil types were mapped on the Project site: Soboba stony loamy with 2 to 9 percent slopes, Soboba gravelly loamy sand with 0 to 9 percent slopes, and Hanford coarse sandy loam with 2 to 9 percent slopes (see Table A and Figure 3).These soils are not classified as hydric and have a drainage class of excessively drained and well drained (NRCS 2024).The existing soils across the Project site are highly compacted, which is indicative of long-term disturbance and consistent with the current site conditions.

Table A: Mapped Soils Classification
Soil Drainage Class Frequency of Flooding Frequency of Ponding Hydric Soil Rating Soboba stony loamy,2 to 0 Excessively Rare None No percent slopes Drained
Soboba gravelly loamy sand,0 to 9 Excessively Rare None No percent slopes Drained
Hanford coarse sandy loam,2 to 9 Well Drained Rare None No percent slopes
Source:United States Department of Agriculture(2024) https://websoilsurvey.nres.usda.gov/app/WebSoilSurvey.aspx(July 2024).

Vegetation and Land Cover
The Project site is almost entirely disturbed and exhibits minimal cover by native species. However, there is a small portion of the site that is composed of native scale broom (Lepidospartum squamatum). Figure 4 shows a map of vegetation and land cover types existing on the Project site, \\eznasunifilerl\projects\20241723_Sen Antonio Driveway Expansion\PRODUCTS\Technical Studies\Biological Resources\Draft Report\20241723_SAWH_BRA_Report.door(09/03/24) 4

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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L SA SEPTEMBER 2024 UPLAND, CALIFORNIA
and Figure 5 provides representative photographs.The approximate acreages of each vegetation/land cover category occurring on site are shown in Table B, below.

Table B: Mapped Vegetation/Land Cover Classifications
Vegetation/Land Cover Project Acreage
Developed 0.64
Disturbed 4.33
Scale broom scrub 0.18
Total 5.12 _
Source:Compilation from field surveys LSA conducted on July 19,2024.

A total of nine vascular plant species were identified within the Project site during the field survey. A majority of these plant species represent non-native taxa. See Appendix B for a full list of plant species identified.

Areas mapped as disturbed land cover make up approximately 4.33 acres of the Project site and is dominated by the following nonnative plant species: erodium (Erodium cicutarium),flax-leaved horseweed (Erigeron bonariensis), and red brome (Bromus rubens).

Native land cover is entirely composed of scale broom scrub and approximately 0.18 acre would potentially be impacted by the Project.

Wetlands and Other Jurisdictional Waters
The United States Army Corps of Engineers (USACE), under Section 404 of the federal Clean Water Act (CWA), regulates discharges of dredged or fill material into "waters of the United States."These waters include wetlands and non-wetland bodies of water that meet specific criteria, including a connection to interstate commerce.This connection may be direct (through a tributary system linking a stream channel with traditional navigable waters used in interstate or foreign commerce) or it may be indirect (through a connection identified in USACE regulations).The USACE typically regulates as non-wetland waters of the United States any body of water displaying an "ordinary high-water mark."To be considered a "jurisdictional wetland" under Section 404, an area must possess hydrophytic vegetation, hydric soils, and wetland hydrology.The CDFW, under Sections 1600 et seq. of the California Fish and Game Code, regulates alterations to lakes, rivers, and streams. A stream is defined by the presence of a channel bed and banks and at least an occasional flow of water.The Regional Water Quality Control Board (RWQCB) is responsible for the administration of Section 401 of the CWA through water quality certification of any activity that may result in a discharge to jurisdictional waters of the United States.The RWQCB may also regulate discharges to "waters of the State," including wetlands, under the California Porter-Cologne Water Quality Control Act.

No drainage features, ponded areas, wetlands, or riparian habitat subject to jurisdiction of CDFW, USACE, and/or RWQCB were found within the Project site. \\eznasunifilerl\projects\20241723_Sen Antonio Driveway Expansion\PRODUCTS\Technical Studies\Biological Resources\Draft Report\20241723_SAWH_BRA_Report.door(09/03/24) 5

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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L SA SEPTEMBER 2024 UPLAND, CALIFORNIA
Wildlife
The disturbed vegetation occurring within the Project site is considered low-quality habitat for most native wildlife species.There are trees adjacent to the Project site and native vegetation that could contribute to nesting but would not be significantly impacted by the proposed development. A total of six wildlife species were observed in (or foraging over)the Project site during the field survey:
mourning Dove (Zenaida macroura), lesser goldfinch (Spinus psaltria), northern mockingbird (Mimus polyglottos), Anna's hummingbird (Calypte anna), and western fence lizard (Sceloporus occidentalis).

Each of these species commonly occur in and around developed areas throughout Southern California.

No federally listed, State-listed, or other special-status species or signs were observed during the field survey.The Project site lacks habitat that would attract special-status wildlife species. Based on field observations and a block security wall, there is no evidence that the site functions as a wildlife movement corridor or an important stopover point for migratory species.

Special-Status Species
No special-status plant or wildlife species were observed during the field survey, but there are three known occurrence records of special-status species within 0.5 mile of the Project.Table C, below, identifies those special-status plant and animal species with CNDDB occurrence record search, and includes detailed information about each species' habitat and distribution, as well as State and federal status designations and the probability of occurrence within the Project disturbance limits. It should be noted that the literature review and record search covered a large, geographically diverse area containing numerous habitat types not found within or around the Project.

None of the species identified in the literature review are expected to occur on the Project site due to historic and ongoing anthropogenic disturbances and the lack of suitable habitats for these species.
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Arctostaphylos glandulosa US:— Evergreen shrub.Rocky areas in chaparral from Blooms March Absent:Project site lacks suitable habitat ssp.gabierlensis CA:— 595 to 1,500 meters(1,950 to 5,000 feet) (evergreen shrubs,or rocky areas in elevation.Known only from Los Angeles,Santa chaparral).

San Gabriel manzanita Barbara,and San Bernardino Counties,California.

Berberis nevinii US:FE Perennial stem succulent that inhabits gravelly Blooms May Absent:Project site lacks suitable habitat CA:CE wash margins in alluvial scrub or coarse soils and through June (gravelly wash margins in alluvial scrub Nevin's barberry rocky slopes in chaparral at 70 to 825 meters(220 or coarse soils and rocky slopes in to 2,700 feet)in elevation.Known occurrences at chaparral).Conspicuous perennial higher elevations are planted(not natural). species not present.

Known only from Los Angeles,San Bernardino,
Riverside,and San Diego counties,California.

Calochortus clavatus var. US:- Chaparral,coastal scrub,and grassland at in the Blooms March Absent:Outside known range of species gracilis CA:- Transverse Ranges at 320 to 1,000 meters(1,050 through June and no suitable habitat(chaparral, to 3,300 feet)elevation.Known only from the (November) coastal scrub,or grassland in transverse Slender mariposa-lily western transverse ranges and San Gabriel ranges)on site.

Mountains of Los Angeles and Ventura Counties,
California.

Calochortus weedii var. US:— Dry,open rocky slopes and rock outcrops in Blooms May Absent:Project site lacks dry,open rocky intermedius CA:— chaparral,coastal sage scrub,and grassland,at through July slopes and rock outcrops.No 105 to 855 meters(340 to 2,800 feet)elevation. (perennial herb) observations were made of Calochortus Intermediate mariposa-lily Known only from Los Angeles,Orange,Riverside, plummerae,which this species likes to and San Bernardino Counties,California.In the intergrade with.The nearest recorded western Riverside County area,this species is observation was approximately 3.4 miles known from the hills and valleys west of Lake away in 2020.

Skinner and Vail Lake(The Vascular Plants of
Western Riverside County,California.F.M.

Roberts et al.,2004).Appears to intergrade with
Calochortus plummerae,which is mostly east and
north of Santa Ana Mountains.
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS C A SEPTEMBER 2024 UPLAND,CALIFORNIA J�` Table C: Special-Status Species Occurrence Probability
Species Status Habitat and Distribution Activity Period Occurrence Probability Calystegia felix US:— Annual or perennial rhizomatous herb.Wetland Blooms March Absent:Project site is not within known CA:— and marshy areas,sometimes alkaline, through elevation and lacks favorable annual or Lucky morning glory sometimes artificially watered,from 30 to 215 September perennial rhizomatous herbs within the meters(100 to 700 feet)elevation.All of the artificially watered area at the front known extant occurrences are associated with entrance.No wetland and marshy areas, well-watered landscaping on recently completed or alkaline soils present. industrial,commercial,and residential
developments in the City of Chino within a
historical area of artesian springs.Older
collections are from areas that are now heavily
urbanized areas(including one from South Los
Angeles and another from Pico Rivera in Los
Angeles County).Known to occur only in western
San Bernardino County.Presumed extirpated
from Riverside and Los Angeles Counties.

Chorizanthe parryi var. US:— Sandy or rocky soils in chaparral,coastal scrub, Blooms April Absent:Project site lacks suitable habitat parryi CA:— oak woodlands,and grassland at 40 to 1,705 through June (sandy or rocky soils in chaparral,coastal meters(100 to 5,600 feet)elevation.Known only (annual herb) scrub,oak woodlands,and grassland).

Parry's spineflower from Los Angeles,Riverside,and San Bernardino Counties.

Cladium californicum US:— Marshes and seeps below 600 meters(2,000 Blooms June Absent:Project site lacks suitable CA:— feet)elevation.In California,known from Inyo, through habitat.No marshes or seeps present.

California saw-grass Riverside,Santa Barbara,San Bernardino and San September Luis Obispo Counties.Believed to be extirpated (perennial from Los Angeles and perhaps San Bernardino rhizomatous bulb) Counties.Also occurs in Arizona,New Mexico,
Nevada,Texas Utah,and Mexico.

Dodecahema leptoceras US: FE In the Vail Lake area,occurs in gravel soils of Blooms April Absent:Project site lacks suitable soils CA:CE Temecula arkose deposits in openings in chamise through June and is not within range of receiving Slender-horned chaparral.In other areas,occurs in sandy cobbly (annual herb) infrequent overbank deposits from spineflower riverbed alluvium in alluvial fan sage scrub generally large washes or rivers.No (usually late seral stage),on floodplain terraces water sources or cryptogamic soil crusts and benches that receive infrequent overbank were observed. deposits from generally large washes or rivers,
where it is most often found in shallow silty
depressions dominated by leather spineflower
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Dudleya multicaulis US:— Heavy,often clay soils or around granitic Blooms April Absent:Project site lacks clay soils, CA:— outcrops in chaparral,coastal sage scrub,and through July chaparral,coastal sage scrub,and Many-stemmed dudleya CRPR:1B.2 grassland below 790 meters(2,600 feet) (perennial herb) grassland habitat. elevation.Known only from Los Angeles,Orange,
Riverside,San Bernardino,and San Diego
Counties.

Eriogonum microthecum US:— Upper montane and subalpine coniferous forest Blooms June Absent:Project site is not located within var.johnstonii CA:— of the San Gabriel Mountains;1,800 to 2,900 through October the subalpine or upper montane CRPR:1B.3 meters(5,900 to 9,500 feet)elevation. (perennial coniferous forest.

Johnston's buckwheat deciduous shrub)
Horkelia cuneata var. US:— Sandy or gravelly soils in chaparral,or rarely in Blooms February Absent:Project site does not contain any puberula CA:— cismontane woodland or coastal scrub at 70 to through July sandy or gravelly soils and lacks CRPR:1B.1 825 meters(200 to 2,700 feet)elevation.Known (sometimes to cismontane woodland and coastal scrub.

Mesa horkelia only from San Luis Obispo,Santa Barbara, September) Ventura,Los Angeles,Orange,and San (perennial herb) Bernardino Counties,California. Believed
extirpated from Riverside and San Diego
Counties.

Lilium parryi US:— Bulbiferous perennial herb of wet areas in Blooms July Absent:No meadows,riparian,or CA:— meadows and riparian and montane coniferous through August montane coniferous forest habitats Lemon lily CRPR:1B.2 forests at 1,220 to 2,790 meters(4,000 to 9,200 (perennial herb) within the Project site. feet)elevation.In California,known from Los
Angeles,Riverside,San Bernardino,and San
Diego Counties.Also occurs in Arizona and
Mexico.

Linanthus concinnus US:— Dry rocky slopes in lower and upper montane Blooms April Absent:No suitable habitat within the CA:— coniferous forest at 1,520 to 2,800 meters(5,000 through July Project site(dry rocky slopes in lower San Gabriel linathus CRPR:1B.2 to 9,200 feet)elevation;known only from Los (annual herb) and upper montane coniferous forest).

Angeles and San Bernardino Counties.
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS S A SEPTEMBER 2024 UPLAND, CALIFORNIA
Table C: Special-Status Species Occurrence Probability
Species Status Habitat and Distribution Activity Period Occurrence Probability Monardella austalis ssp. US:— Steep scree or talus slopes between breccia and Blooms July Absent:No suitable habitat within the jokerstii CA:— secondary alluvial benches along drainages and through Project site(steep scree or talus slopes CRPR:1B.1 washes,in lower montane coniferous forest and September between breccia and secondary alluvial Jokerst's monardella chaparral at 1,350 to 1,750 meters(4,430 to (perennial benches along drainages and washes,in 5,740 feet).Known only from the San Gabriel rhizomatous herb) lower montane coniferous forest and Mountains of San Bernardino County,California. chaparral).

Monardella breweri ssp. US:— Chaparral and lower montane coniferous forests, Blooms May Absent:No suitable habitat within the glandulifera CA:— particularly in dry,grassy openings and ridgetops through August Project site(chaparral and lower CRPR:1B.2 between elevations of 1,300 and 1,500 meters. (Annual herb) montane coniferous forests,particularly Brown's flat monardella Found in Los Angeles County. in dry,grassy openings and ridgetops).

Monardella macrantha ssp. US:— Dry slopes and ridges in openings in chaparral, Blooms June Absent:No suitable habitat within the hallii CA:— woodland,and forest at 695 to 2,195 meters through August Project site(dry slopes and ridges in CRPR:1B.3 (2,280 to 7,200 feet)elevation. Known only from (sometimes to openings in chaparral,woodland,and Hall's monardella Los Angeles,San Diego,Orange,Riverside,and October) forest).

San Bernardino Counties,California.In the (perennial herb) western Riverside County area,known only from
higher elevations in the Santa Ana and Agua Tibia
Mountains(The Vascular Plants of Western
Riverside County,California. F.M. Roberts et al.,
2004).

Muhlenbergia utilis US:— Wet sites along streams and ponds within Blooms March Absent:No streams or ponds with CA:— meadows,coastal sage scrub,chaparral,and through October meadows,coastal sage scrub,chaparral, Aparejo grass CRPR:2B.2 cismontane woodland below 2,325 meters(7,628 (perennial herb) and cismontane woodland are on site to feet)elevation.In California,known from Inyo, provide suitable habitat.

Kern,Monterey,San Bernardino,San Luis Obispo,
Santa Barbara,and Ventura Counties.Also occurs
in Arizona, Nevada,New Mexico,and Mexico.

Navarretia prostrata US:— Vernal pools,usually alkaline,from 15 to 1,210 Blooms April Absent:No vernal pools present on CA:— meters(50 to 4,000 feet)elevation.Known only through July Project site.

Prostrate vernal pool CRPR:1B.2 from Alameda,Fresno,Los Angeles,Merced, (annual herb) navarretia Monterey,Orange,Riverside,San Benito,San Diego,and San Luis Obispo Counties. Presumed
extirpated from San Bernardino County.
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS C A SEPTEMBER 2024 UPLAND, CALIFORNIA J/(-` Table C: Special-Status Species Occurrence Probability
Species Status Habitat and Distribution Activity Period Occurrence Probability Oreinana vestita US:— Scree,talus,or gravel on high ridges in subalpine Blooms May Absent:No suitable habitat within the CA:— coniferous forest and upper montane coniferous through Project site(scree,talus,or gravel on Woolly mountain-parsley CRPR:1B.3 forest at 1,615 to 3,500 meters(5,300 to 11,500 September high ridges in subalpine coniferous forest feet)elevation.Known only from Kern,Los (perennial herb) and upper montane coniferous forest).

Angeles,and San Bernardino Counties,California.

Phacelia stellaris US:— Dunes and sandy openings in coastal scrub Blooms March Absent:No dunes or sandy areas on site.

CA:— communities at 5 to 400 meters(20 to 1,300 feet) through June Project is also not within a sandy wash or Brand's star phacelia CRPR:1B.1 elevation.In western Riverside County,this (annual herb) bench. species appears to be restricted to sandy washes
and benches in alluvial floodplains. Known only
from Los Angeles(believed extirpated),Riverside
and San Diego Counties,California.The most
recent record of this species from Los Angeles
County was in 1943.

Pseudognaphalium US:— Sand and gravel at the edges of washes or Blooms usually Absent:Site is not within the edge of a leucocephalum CA:— mouths of steep canyons at 0 to 2,100 meters August through wash or mouth of a steep canyon.No CRPR:2B.2 (0 to 7,000 feet)elevation. In California,known November sandy or gravelly soils present.

White rabbit-tobacco from Los Angeles,Orange,Riverside,Santa (perennial herb) Barbara,San Diego,San Luis Obispo,and Ventura
Counties.Also occurs in Arizona,New Mexico,
Texas,and Mexico.

Sagittaria sanfordii US:— Marshes and swamps below 650 meters(2,100 Blooms May Absent:No marshes or swamps occur at CA:— feet)elevation.Occurs in standing or slow- through October this Project site.

Sanford's arrowhead CRPR:1B.2 moving fresh water(ponds,marshes,and (perennial ditches). Known only from Butte,Del Norte,El emergent herb) Dorado, Fresno, Merced,Mariposa,Placer,
Sacramento,Shasta,San Joaquin,and Tehama
Counties.Believed extirpated from Southern
California.

Sidalcea neomexicana US:— Alkaline springs and brackish marshes below Blooms March Absent:No alkaline or brackish habitats CA:— 1,530 meters(5,000 feet)elevation.In California, through June present on Project site.

Salt Spring checkerbloom CRPR:2B.2 known only from Kern,Orange,Riverside,San (perennial herb) Bernardino,San Diego,and Ventura Counties.

Believed extirpated from Los Angeles County.

Also known from Arizona,New Mexico,Nevada,
Utah,and Mexico.
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CRPR:1B.2 meters(6,700 feet)elevation. In California, (perennial herb) San Bernardino aster known from Ventura,Kern,San Bernardino,Los Angeles,Orange,Riverside,and San Diego
Counties.May also occur in San Luis Obispo
County.In the western Riverside County area,
this species is scarce,and documented only from
Temescal and San Timoteo Canyons(The Vascular
Plants of Western Riverside County,California.

F.M.Roberts et al.,2004).

Symphyotrichum greatae US:— Mesic places in canyons in chaparral and Blooms June Absent:No chaparral or woodland CA:— woodland habitats at 300 to 2,010 meters(1,000 through October habitat present on Project site.

Greata's aster CRPR:1B.3 to 6,600 feet)elevation. Known only from Los (perennial herb) Angeles,San Bernardino,and Ventura Counties.

Thysanocarpus rigidus US:— Dry rocky slopes,in oak,pine,or juniper Blooms February Absent:No suitable habitat within the CA:— woodland at 600 to 2,200 meters(2,000 to 7,200 through May Project site(dry rocky slopes,in oak, Rigid fringepod CRPR:1B.2 feet)elevation.In California,known from Los (annual herb) pine,or juniper woodland).

Angeles,Riverside,San Bernardino,and San
Diego Counties.Also occurs in Mexico.

Viola pinetorum ssp.grisea US:— Dry mountain peaks and slopes in meadows and Blooms April Absent:No suitable habitat within the CA:— upper montane and subalpine coniferous forest through July Project site(dry mountain peaks and Grey-leaved violet CRPR:1B.2 at 1,500 to 3,400 meters(5,000 to 11,000 feet) (perennial herb) slopes in meadows and upper montane elevation.Known only from Fresno,lnyo,Kern, and subalpine coniferous forest).

Los Angeles,Madera,San Bernardino,Tulare,and
Ventura Counties,California.

Invertebrates
Bombus crotchii US:— Inhabits open scrub(including chaparral)and Spring and Absent:Project site lacks scrub habitat.

CA:SCE grassland from coastal California to crest of summer Site consists of minimal,non-native Crotch bumble bee Sierra-Cascade and in desert edge areas,south grassland that is often disturbed into Mexico.Primarily nests underground. resulting in the destruction or removal of Suitable bumble bee habitat requires the vegetation as seen in ariels throughout continuous availability of flowers on which to the years.Therefore,no suitable flower forage throughout the duration of the colony availability is present to support a (spring through fall),colony nest sites,and colony. overwintering sites for the queens.
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS S A SEPTEMBER 2024 UPLAND, CALIFORNIA
Table C: Special-Status Species Occurrence Probability
Species Status Habitat and Distribution Activity Period Occurrence Probability Bombus pensylvanicus US:— Inhabits open farmland and fields throughout the Spring and Absent:Project site is not composed of CA:— U.S.Also occurs in Canada and Mexico.Primarily Summer open farmland or fields and lacks flower American bumble bee nests at the ground surface in tall grass,but availability to support a colony.Site is occasionally underground.Suitable bumble bee often disturbed which does not allow the habitat requires the continuous availability of growth of tall grass that is needed for flowers on which to forage throughout the nesting. duration of the colony(spring through fall),
colony nest sites,and overwintering sites for the
queens.

Callophrys mossii hidakupa US:— Inhabit rocky outcrops,woody canyons and cliffs. April through June Absent:Project site lacks suitable habitat CA:— Larvae host plants for this species include (rocky outcrops,woody canyons or San Gabriel Mountains Dudleya sp. cliffs).Larvae host plant Dudleya sp.not elfin butterfly _ observed on site.

Gonidea angulata US:— Commonly found in stream and lakes.Prefer a Spring and Absent:No water features are within the CA:— constant waterflow and well-oxygenates stable Summer Project site.

Western ridges mussel substrates.Not commonly found in continuously turbid waters.

Neolarra alba US:— Kleptoparasite that occurs in Southern California. N/A Low:Little is known about the habitat CA:— needs of this species.The Project site is White cuckoo bee within the range for this species.

However,due to lack of vegetation on
this site,the species is not expected to
be present.There are no known records
of occurrence within 5 miles of the
Project.

Rhaphiomidas terminatus US: FE Restricted to Delhi series sands in western Above ground Absent:No Delhi series sands on Project abdominalis CA:SA Riverside and San Bernardino Counties. emergence August site. and September.

Delhi Sands flower-loving Not visible during fly the rest of the
year.
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Santa Ana sucker drainage systems located in Southern California.

An introduced population also occurs in the Santa
Clara River drainage system in southern
California.Found in shallow,cool,running water.

Gila orcutti US:— Perennial streams or intermittent streams with Year-round Absent:Project site does not contain any CA:SSC permanent pools;slow water sections of streams water features.

Arroyo chub with mud or sand substrates;spawning occurs in pools.Native to Los Angeles,San Gabriel,San Luis
Rey,Santa Ana,and Santa Margarita River
systems;introduced in Santa Ynez,Santa Maria,
Cuyama,and Mojave River systems and smaller
coastal streams.

Amphibians
Anaxyrus(Bufo)californicus US:FE Washes and arroyos with open water;sand or March through Absent:Project site lacks suitable habitat CA:SSC gravel beds;for breeding,pools with sparse July (washes or arroyos with open water; Arroyo toad overstory vegetation.Coastal and a few desert sand or gravel beds).Site does not streams from Santa Barbara County to Baja contain any open water or water California. sources.

Batrachoseps gabrieli US:— Found under rocks,wood,fern fronds and on soil Winter through Absent:Project site lacks suitable habitat CA:— at the base of talus slopes.This salamander is early spring (rocks,wood,fern fronds,or soil at the San Gabreil slender most active on the surface in winter and early base of talus slopes). salamander spring.Known only from the San Gabriel Mountains. _
Rana boylii US:FE/FT Partly-shaded,shallow streams and riffles with a Unknown Absent:No suitable habitat is present on CA:SE/ST/SSC rocky(at least some cobble-sized)substrate for Project site.Outside the known range of Foothill yellow-legged frog egg-laying,and with water for at least 15 weeks this species and the site does not contain until metamorphosis.Historically occurred in any water features. much of northern and central California,south
along the western foothills of the Sierra Nevada
to the edge of the Tehachapi Mountains,and
south along the coast ranges to the San Gabriel
Mountains(south to the San Gabriel River)in Los
Angeles County.
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Southern mountain open margins and gently sloping bottom. yellow-legged frog Transverse Ranges in southern California from 370 to 2,290 meters(1,200 to 7,500 feet)
elevation.Restricted to streams in ponderosa
pine,montane hardwood-conifer,and montane
riparian habitats.

Spea hammondii US:PT Grasslands and occasionally hardwood October through Absent:Site is highly disturbed and CA:SSC woodlands;largely terrestrial but requires rain April(following within a developed area.No vernal pools Western spadefoot pools or other ponded water persisting at least onset of winter occur on site for breeding and soils are three weeks for breeding;burrows in loose soils rains) too compacted for burrowing. during dry season.Occurs in the Central Valley
and adjacent foothills,the non-desert areas of
southern California,and Baja California.

Taricha torosa US:— Breeds in ponds,reservoirs,and slow-moving October through Absent:Project site does not contain CA:SSC streams with long-lasting(at least through July), May water features and lacks grassland, Coast Range newt clean water;uses nearby upland areas including chaparral,or woodland habitat.No grassland,chaparral,and woodland;coastal coastal drainages are present. drainages from Mendocino County south to San
Diego County,with populations from San Luis
Obispo County south designated as sensitive.

Reptiles
Anniella stebbinsi US:— Inhabits sandy or loose loamy soils with high Nearly year round, Absent:Project site is highly disturbed CA:SSC moisture content under sparse vegetation in at least in and contains inadequate soils.

Southern California legless Southern California. southern areas lizard
Arizona elegans US:— Scrub and grassland habitats,often with loose or Most active March Absent:Although ruderal/non-native occidentalis CA:SSC sandy soils.Patchily distributed from the eastern through June grasslands are present,site soil textures portion of San Francisco Bay to southern San (nocturnal) do not meet the requirements needed to California glossy snake Joaquin Valley and in non-desert areas of support suitable habitat and Project site southern California.Also occurs in Baja California, is highly disturbed.

Mexico.
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS C A SEPTEMBER 2024 UPLAND, CALIFORNIA J/(-` Table C: Special-Status Species Occurrence Probability
Species Status Habitat and Distribution Activity Period Occurrence Probability Aspidoscelis tigris US:— Woodlands,riparian areas,and sparsely April through Absent:Although ruderal/non-native stejnegeri CA:SSC vegetated areas in a wide variety of habitats August grasslands are present,site soil textures including coastal sage scrub and sparse grassland. do not meet the requirements needed to Coastal whiptail Occurs in valleys and foothills from Ventura support suitable habitat.

County to Baja California.

Phrynosoma blainvillii US:— Primarily in sandy soil in open areas,especially April through July Absent:Project site lacks sandy soils for (coronatum) CA:SSC washes and floodplains,in many plant with reduced burrowing and scrub needed for cover. communities.Requires open areas for sunning, activity August Sparse vegetation on site is not expected Coast horned lizard bushes for cover,patches of loose soil for burial, through October to contribute to the abundance of and an abundant supply of ants or other insects. insects or ants being present.

Occurs west of the deserts from northern Baja
California north to Shasta County below 2,400
meters(8,000 feet)elevation.

Thamnophis hammondii US:— Highly aquatic.Only in or near permanent Diurnal Year-round Absent:No permanent water sources CA:SSC sources of water.Streams with rocky beds occur on the Project site.

Two-striped garter snake supporting willows or other riparian vegetation.

From Monterey County to northwest Baja
California.

Birds
Agelaius tricolor US:— Open country.Forages in grassland and cropland Year-round Absent:Project site lacks suitable (nesting colony) CA:ST/SSC habitats.Nests in large groups near fresh water, habitat.No grassland or cropland is preferably in emergent wetland with tall,dense present,and site lacks emergent Tricolored blackbird cattails or tules,but also in thickets of willow, wetlands needed for nesting. blackberry,wild rose,or tall herbs.Seeks cover
for roosting in emergent wetland vegetation,
especially cattails and tules,and also in trees and
shrubs.Occurs in western Oregon,California,and
northwestern Baja California.

Aimophila ruficeps US:— Coast lowlands and foothills in sage scrub,broken Year-Round, Absent:Project site lacks suitable canescens CA:WL or burned chaparral,and grassland with scattered diurnal active habitat.No scrubby habitat on rocky shrubs.Prefers open scrubby habitat on rocky xeric slopes occur on site.

Southern California rufous- xeric slopes.
crowned sparrow
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS S A SEPTEMBER 2024 UPLAND, CALIFORNIA
Table C: Special-Status Species Occurrence Probability
Species Status Habitat and Distribution Activity Period Occurrence Probability Athene cunicularia US:— Open,treeless areas with low,sparse vegetation, Year-round Low to Moderate:Habitat on site has (burrow sites) CA:SSC usually on flat or gently sloping terrain,including the potential to be suitable. However, grasslands,sparse scrub(cover less than 30 species has not been seen within 10 Burrowing owl percent),farmland,airfields,airports,road miles of the Project site according to embankments,cemeteries,urban vacant lots, ebird records(2024).Site is also highly desert areas,and other open habitat.They disturbed and no efficient size burrows usually occupy ground squirrel burrows but may were observed during the July field also utilize man-made structures such as culverts survey. or debris piles,usually temporarily.

Beuto swansoni US:— Open desert,grassland,or cropland containing Spring and Fall Absent:Project site lacks suitable(open CA:CT scattered,large trees or small groves.Breeds in desert,grassland,or cropland containing Swainson's hawk stands with few trees in juniper-sage flats, scattered,large trees or small groves) riparian areas,and in oak savannah in the Central habitat.Site also lacks trees in juniper- Valley.Forages in adjacent grasslands or suitable sage flats,riparian areas,or oak grain or alfalfa fields,or livestock pastures. savannah necessary for breeding.

Breeds and nests in western North America;
winters in South America.Uncommon breeding
resident and migrant in the Central Valley,
Klamath Basin,Northeastern Plateau,Lassen
County,and Mojave Desert.Very limited
breeding reported from Lanfair Valley,Owens
Valley,Fish Lake Valley,and Antelope Valley. In
Southern California,now mostly limited to spring
and fall transient. Formerly abundant in California
with wider breeding range.

Cypseloides niger US:— Most frequently seen in the air feeding on tiny Spring through Absent:Project site lacks suitable habitat CA:SSC airborne insects.Usually seen near cliffs in Summer (cliffs in mountainous regions or coastal Black swift mountainous regions;occasionally coastal.Nests terrain)for nesting and foraging. in crevices in deep canyon cliffs near waterfalls or
in sea cliffs. In California,breeds very locally in
the Sierra Nevada and Cascade Range,the San
Gabriel,San Bernardino,and San Jacinto
Mountains,and in coastal bluffs and mountains
from San Mateo County south to probably San
Luis Obispo County.
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS C A SEPTEMBER 2024 UPLAND,CALIFORNIA J�` Table C: Special-Status Species Occurrence Probability
Species Status Habitat and Distribution Activity Period Occurrence Probability Laterallus jamaicensis US:— Requires shallow water in salt marshes, Year-round Absent:No water sources,fresh or coturniculus CA:ST/CFP freshwater marshes,wet meadows,or flooded saltwater marshes,wet meadows,or grassy vegetation.Prefers areas of moist soil flooded grassy vegetation present on California black rail vegetated by fine-stemmed emergent plants, Project site. rushes,grasses,or sedges,with scattered small
pools.Known from coastal California,
northwestern Baja California,the lower Imperial
Valley,and the lower Colorado River of Arizona
and California.Now extirpated from virtually all
of coastal Southern California.

Polioptila californica US: FT Inhabits coastal sage scrub in low-lying foothills Year-round Absent:Project site lacks suitable californica CA:SSC and valleys up to about 500 meters(1,640 feet) habitat.No coastal sage scrub in low- elevation in cismontane southwestern California lying foothills or valleys are present.

Coastal California and Baja California.
gnatcatcher
Mammals
Antrozous pallidus US:— Most common in open,dry habitats with rocky Year-round; Low:Site does not contain preferred CA:SSC areas for roosting.Day roosts in caves,crevices, nocturnal habitat for general roosting.However, Pallid bat rocky outcrops,tree hollows or crevices,mines adjacent more developed lands or trees and occasionally buildings,culverts,and bridges. may provide space for night roosting Night roosts may be more open sites,such as allowing them to present within the porches and open buildings.Grasslands, Project site for foraging. shrublands,woodlands,and forest in western
North America.

Chaetodipus fallax fallax US:— Found in sandy herbaceous areas,usually Year-round Low:Project lacks sandy herbaceous CA:SSC associated with rocks or coarse gravel in coastal areas.Site is highly disturbed in which Northwestern San Diego scrub,chaparral,grasslands,and sagebrush,from vegetation varies due to the destruction pocket mouse Los Angeles County through southwestern San or disturbance of it.

Bernardino,western Riverside,and San Diego
Counties to northern Baja California.

Dipodomys merriami US:FE Gravelly and sandy soils of alluvial fans,braided Nocturnal,active Low:Project site lacks preferred habitat. parvus CA:SE/SSC river channels,active channels and terraces;San year-round No gravelly or sandy soils of alluvial fans, Bernardino Valley(San Bernardino County)and braided river channels,active channels San Bernardino kangaroo San Jacinto Valley(Riverside County).In San or terraces.Site is highly disturbed in rat Bernardino County,this species occurs primarily which vegetation varies due to the in the Santa Ana River and its tributaries north of
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L C A SEPTEMBER 2024 UPLAND,CALIFORNIA J�` Table C: Special-Status Species Occurrence Probability
Species Status Habitat and Distribution Activity Period Occurrence Probability Interstate 10,with small remnant populations in destruction or disturbance of it as seen the Etiwanda alluvial fan,the northern portion of in ariels and during the field survey. the Jurupa Mountains in the south Bloomington
area,and in Reche Canyon.In Riverside County,
this species occurs along the San Jacinto River
east of approximately Sanderson Avenue,and
along Bautista Creek.Remnant populations may
also occur within Riverside County in Reche
Canyon,San Timoteo Canyon,Laborde Canyon,
the Jurupa Mountains,and the Santa Ana River
Wash north of State Route 60.

Dipodomys stephensi US:FT Found in plant communities transitional between Year-round, Absent:Project site lacks suitable habitat CA:ST grassland and coastal sage scrub,with perennial nocturnal No grassland or coastal sage scrub Stephen's kangaroo rat vegetation cover of less than 50 percent.Most communities onsite.Site is also not commonly associated with Artemisia tridentata, within the known range of this species.

Eriogonum fasciculatum,and Erodium.Requires
well-drained soils with compaction characteristics
suitable for burrow construction(neither sandy
nor too hard).Not found in soils that are highly
rocky or sandy,less than 20 inches deep,or
heavily alkaline or clay,or in areas exceeding 25
percent slope.Occurs only in western Riverside
County,northern San Diego County,and extreme
southern San Bernardino County,below 915
meters(3,000 feet)elevation.In northwestern
Riverside County,known only from east of
Interstate 15.Reaches its northwest limit in south
Norco,southeast Riverside,and in the Reche
Canyon area of Riverside and extreme southern
San Bernardino Counties.

Eumops perotis californicus US:— Occurs in many open,semi-arid to arid habitats, Year-round; Low:Project site lacks favorable roosting CA:SSC including conifer and deciduous woodlands, nocturnal habitat,but species may forage over the Western mastiff bat coastal scrub,grasslands,chaparral,etc.;roosts site. in crevices in vertical cliff faces,high buildings,
and tunnels,and in palm fronds;travels widely
when foraging.
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS S A SEPTEMBER 2024 UPLAND, CALIFORNIA
Table C: Special-Status Species Occurrence Probability
Species Status Habitat and Distribution Activity Period Occurrence Probability Lasiurus cinereus US: Forages over a wide range of habitats,but prefers Primarily the Low:Project site contains open habitat CA:SA open habitats with access to trees for roosting, warmer months; and trees.However,very few trees are Hoary bat and water.Ranges throughout most of California. leaves colder areas present and only make up a small during winter portion of the Project site.The site itself lacks favorable habitat and sources of
water,but species may forage over the
site.

Lasiurus xanthinus US:— Found mostly in desert and desert riparian areas Year-round; Absent:Project site is not within a desert CA:SSC of the southwest US,but also expanding its range nocturnal or desert riparian area.

Western yellow bat with the increased usage of native and non- native ornamental palms in landscaping.

Individuals typically roost amid dead fronds of
palms,but have also been documented roosting
in cottonwood trees. Forage over many habitats.

Lepus californicus bennettii US:— Variety of habitats including herbaceous and Year-round, Low:Project site is within a heavily CA:SA desert scrub areas,early stages of open forest diurnal and developed area.Site is highly disturbed San Diego black-tailed and chaparral.Most common in relatively open crepuscular in which vegetation varies due to the soil jackrabbit habitats.Restricted to the cismontane areas of activity compaction and disturbance.

Southern California,extending from the coast to
the Santa Monica,San Gabriel,San Bernardino,
and Santa Rosa Mountain ranges.

Neotoma lepida intermedia US:— Found in desert scrub and coastal sage scrub Year-round,mainly Absent:Project site lacks desert or CA:SSC habitat,especially in association with cactus nocturnal, coastal scrub habitat and lacks cacti and San Diego desert woodrat patches. Builds stick nests around cacti,or on occasionally rocky crevices for nesting. rocky crevices.Occurs along the Pacific slope crepuscular and from San Luis Obispo County to northwest Baja diurnal California.

Nyctinomops macrotis US:— Inhabits rugged,rocky canyon country in Year-round Absent:Project site lacks suitable CA:SSC southwestern United States. Found from habitat.No rugged,rocky canyon Big free-tailed bat northern South America and the Caribbean country present on site.

Islands northward to the western United States.

In the southwestern U.S.,populations appear to
be scattered.
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L C A SEPTEMBER 2024 UPLAND,CALIFORNIA J�` Table C: Special-Status Species Occurrence Probability
Species Status Habitat and Distribution Activity Period Occurrence Probability Ovis canadensis nelson US:— Occurs in open,rocky,steep areas with available Year-round Absent:Project site lacks open,rocky, CA:FP water and herbaceous forage;widely distributed steep areas with available water and Desert bighorn sheep from the White Mountains in Mono County to herbaceous forage. the Chocolate Mountains in Imperial County.

Perognathus longimembris US:— Prefers sandy soil for burrowing,but has been Nocturnal.Active Absent:Site lacks appropriate soils for brevinasus CA:SSC found on gravel washes and stony soils.Found in late spring to early burrowing and coastal sage scrub. coastal sage scrub in Los Angeles,Riverside,and fall.

Los Angeles pocket mouse San Bernardino Counties.

Source:Compiled by LSA(2024).

US:Federal Classifications
FE Listed as Endangered.

FT Listed as Threatened.

FPE Proposed for listing as Endangered.

FPT Proposed for listing as Threatened.

FPD Proposed for delisting.

FC Candidate for listing as Threatened or Endangered.

CA:State Classifications
SE State-listed as Endangered.

ST State-listed as Threatened.

SR State-listed as Rare.

SCE Candidate for State-listing as Endangered.

SCT Candidate for State-listing as Threatened.

SC Candidate for State-listing as Threatened or Endangered.

SSC Species of Special Concern.Refers to animals with vulnerable or seriously declining populations.

CFP California Fully Protected.Refers to animals protected from take under Fish and Game Code sections 3511,4700,5050,and 5515.

SA Special Animal.Refers to any other animal monitored by the Natural Diversity Data Base,regardless of its legal or rarity status. 1A California Rare Plant Rank 1A—presumed extinct in California. 1B California Rare Plant Rank 16—rare,threatened or endangered in California and elsewhere. 2B California Rare Plant Rank 26—rare,threatened or endangered in California,but more common elsewhere. 3 California Rare Plant Rank 3—a review list of plants about which more information is needed. 4 California Rare Plant Rank 4—a watch list of plants of limited distribution.

MSHCP:Western Riverside County MSHCP Status
C Species is covered and adequately conserved under the MSHCP.

S Species is covered and adequately conserved under the MSHCP,but surveys are required within indicated habitats and/or survey areas.

P Species is covered and will be adequately conserved when MSHCP specified requirements are met.

CNDDB=California Natural Diversity Database
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L SA SEPTEMBER 2024 UPLAND, CALIFORNIA

IMPACT FINDINGS

VEGETATION AND HABITAT IMPACTS
Based on the current conditions of the Project site, construction activities would result in less than significant impacts to native habitat and would not result in any direct impacts to sensitive natural communities. According to CNDDB,there are no recorded observations of natural communities of special concern with potential to occur within the Project site or vicinity. Additionally, no natural communities of special concern were observed during the biological survey.

THREATENED AND ENDANGERED SPECIES
Under provisions of Section 7(a)(2) of the federal Endangered Species Act, a federal agency that permits, licenses,funds, or otherwise authorizes a project activity must consult with the USFWS to ensure that its actions would not jeopardize the continued existence of any listed threatened or endangered species or destroy or adversely modify critical habitat.The USFWS designates as threatened or endangered species that are at risk of extinction and may also adopt recovery plans that identify specific areas that are essential to the conservation of a listed species. Critical habitat areas that may require special management considerations or protections can also be designated.

CESA is administered by the CDFW and prohibits the "take" of plant and animal species identified as either threatened or endangered in the State of California by the Fish and Game Commission (Fish and Game Code Sections 2050 to 2097). "Take" is defined as to hunt, pursue, catch, capture, or kill.

Sections 2091 and 2081 of CESA allow the CDFW to authorize exceptions to the prohibition of"take" of State-listed threatened or endangered plant and animal species for purposes such as public and private development.The CDFW requires formal consultation to ensure that a proposed project's actions would not jeopardize the continued existence of any listed species or destroy or adversely affect listed species' habitats.

As described in Table C, no regionally occurring special-status animal species are expected to be present on the Project site or to be adversely affected by the Project due to the lack of suitable habitats and the developed/disturbed conditions within the direct disturbance limits of the Project.

Additionally, as described in Table C, no federal or State-listed endangered plant species are expected to occur on the Project site due to the lack of suitable soils.Therefore, the Project would have no effects on federally listed endangered plant species.

No USFWS designated critical habitat is present on the Project site.Therefore, the Project would have no effects on designated critical habitat.

NON-LISTED SPECIAL-STATUS SPECIES
The following non-listed special-status species as identified in Table C are not expected to occur on the Project site due to a lack of suitable habitat: Southern California legless lizard (Anniella stebbinsi), pallid bat(Antrozous pallidus), California glossy snake (Arizona elegans occidentalis), burrowing owl (Athene cunicularia), western yellow bat(Lasiurus xanthinus), San Diego desert \\eznesunifilerl\projects\20241723_Sen Antonio Driveway Expansion\PRODUCTS\Technical Studies\Biological Resources\Draft Report\20241723_SAWH_BRA_Report.door(09/03/24) 22

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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L SA SEPTEMBER 2024 UPLAND, CALIFORNIA
woodrat(Neotoma lepida intermedia), big free-tailed bat (Nyctinomops macrotis), and coast horned lizard (Phrynosoma blainvillii).These species all have a limited population distribution in Southern California.These animals have no official State or federal protection status but require consideration under CEQA.

Burrowing owls, however, have a low to moderate probability of occurrence within the Project site.

Burrowing owls inhabit open country across much of North America, typically occupying ground squirrel burrows in open, dry grasslands, agricultural and range lands, and other developed/ ornamental areas.They often utilize man-made structures and avoid tall, thick vegetation and brush. While the Project site does have disturbed soils and minimal vegetation cover conducive to burrowing owl usage, no burrows or signs of burrowing owls were observed during the field survey.

Given the probability of occurrence is "Low to Moderate," LSA recommends the following impact avoidance measure:
• Preconstruction Presence/Absence Survey: 14 days prior to the commencement of proposed project activities, a qualified biologist will conduct a Presence/Absence survey of suitable habitat on the project site as well as survey for signs of scat/ burrow usage. If burrowing owls/ active burrows are directly observed within the Project site during the preconstruction survey, a suitable buffer will be placed around the active burrow as determined by a qualified biologist and avoided until the individuals leave of their own accord.Additionally, if burrowing owl is found during the preconstruction survey,the Project proponent will need to inform the CDFW and USFWS and prepare a Burrowing Owl Protection and Relocation Plan for approval by these agencies prior to initiating ground disturbance.

NESTING BIRDS
There are trees adjacent to or within the Project site and construction activities could result in impacts to nesting bird species. To reduce the potential impact, construction activities should try and avoid the nesting bird season (February 1 through September 15) or perform a preconstruction nesting bird survey prior to any Project activities planned during the nesting bird season to ensure compliance with the federal Migratory Bird Treaty Act and California Fish and Game Code Sections 3500-3516. Implementation of the following measures will reduce potential impacts to nesting raptors, migratory birds, and special status birds to a less than significant level under CEQA and will ensure compliance with State and federal laws protecting these avian species. • Construction Activity:The Project's construction activities will occur, if feasible, between September 16 and January 31 (outside of nesting bird season) in an effort to avoid impacts to nesting birds. If activities must occur within nesting bird season (February 1 to September 15), a qualified biologist will conduct a pre-construction survey no more than 3 days (72 hours) prior to any construction activities and vegetation removal. Should nesting birds be found, an exclusionary buffer will be established by the qualified biologist.The buffer will be clearly marked in the field by construction personnel under guidance of the qualified biologist. No construction activities will be allowed within this zone until the qualified biologist determines that the young have fledged, or the nest is no longer active. \\eznesunifilerl\projects\20241723_Sen Antonio Driveway Expansion\PRODUCTS\Technical Studies\Biological Resources\Draft Report\20241723_SAWH_BRA_Report.door(09/03/24) 23

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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L SA SEPTEMBER 2024 UPLAND, CALIFORNIA
• Tree Trimming and Removal:To the greatest extent feasible,tree trimming/removal activities will be performed outside of the nesting season for birds (February 1—September 15). If trimming or removal of trees during the nesting bird season cannot be avoided, a qualified biologist will monitor tree trimming and removal activities, if nest are found present during the pre-construction survey.

WILDLIFE MOVEMENT, CORRIDORS, AND NURSERY SITES
Wildlife movement includes seasonal migration along corridors as well as daily movements for foraging. Migration corridors may include areas of unobstructed movement of deer, riparian corridors providing cover for migrating birds, routes between breeding waters and upland habitat for amphibians, and areas between roosting and feeding areas for birds.

Wildlife species that occur in the Project vicinity are adapted to the urban-wildland interface and the study area is primarily developed as existing roadway infrastructure and residential development that already restrict wildlife movement.Although there is an undeveloped lot adjacent to the eastern boundary of the Project site, areas south,west, and north are fully developed and provide little to no value to wildlife movement. Because the Project site is surrounded by development and a brick wall,the Project's activities would not place any permanent barriers within any known wildlife movement corridors or interfere with habitat connectivity and therefore would not substantially limit wildlife movement more than current wildlife movement limitations. The Project site does not correspond to any landscape blocks or essential connectivity areas, as documented in the California Essential Habitat Connectivity Project report (Beier et al. 2011).

LOCAL TREE ORDINANCE
Removal of any City tree by anyone other than the City of Upland must comply by the City of Upland's local tree ordinance (12.24.100) (City of Upland Code of Ordinances 2024).Trees were observed within or adjacent to the Project site. However, the Project does not intend to disturb or remove them. Should any potential disturbance or removal of these trees become necessary,the regulations outlined in the City of Upland's Tree Ordinance would need to be followed. \\aznasundderl\projects\20241723_San Antonio Driveway Expansion\PRODUCTS\Technical Studies\Biological Resources\Draft Report\20241723_SAWH_BRA_Report.docx(09/03/24) 24

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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L SA SEPTEMBER 2024 UPLAND, CALIFORNIA

REFERENCES
Beier P., Wayne S., Baldwin R., and McRae B.. (2011).Toward Best Practices for Developing Regional Connectivity Maps. Conservation biology: the journal of the Society for Conservation Biology. 25. 879-92. 10.1111/j.1523-1739.2011.01716.x.

California Department of Fish and Wildlife (CDFW). 2024. California Natural Diversity Database (CNDDB). RareFind 5 (version 5.3.0). Website: https://wildlife.ca.gov/Data/CNDDB (accessed July 2024).

California Native Plant Society(CNPS). 2024. Rare Plant Program, Rare Plant Inventory(v9.5).

Website: https://www.rareplants.cnps.org (accessed July 2024).

City of Upland Code of Ordinances,Title 12 Streets, Sidewalks, and Public Places, Chapter 12.24 Parkways, Parking Strips, 12.24.070 Planting details. 2024. Website: City of Upland, CA PARKWAYS, PARKING STRIPS (ecode360.com) (accessed August 2024) Google Earth Pro. 2024. Aerial photographs of the Project site and surrounding areas (accessed July 2024).

Natural Resources Conservation Service (NRCS). 2024. WebSoil Survey(Version 3.4.0). United States Department of Agriculture (USDA). Website: https://websoilsurvey.sc.egov.usda.gov/ (accessed July, 2024).

United States Fish and Wildlife Service (USFWS). 2024a. Environmental Conservation Online System (ECOS). Information for Planning and Consultation (IPaC)Trust Resources Report. Website:
http://ecos . fws.gov/ecp/(accessed July 2024).
. 2024b. National Wetland Inventory. Website: https://www.fws.gov/program/national- wetlands-inventory/wetlands-mapper(accessed July 2024). . 2024c. USFWS Threatened & Endangered Species Active Critical Habitat Report. Website:
http://ecos.fws.gov/crithab/(accessed July 2024).
. 2024d. USFWS Critical Habitat Mapper. February 8. Website: http://ecos.fws.gov/crithab/ (accessed July 2024).

United States Department of Agriculture (USDA). 2024. Natural Resource Conservation Service (NRCS). Website: https://websoilsurvey.nrcs.usda.gov/app/WebSoilSurvey.aspx(accessed July, 2024)
United States Geological Survey(USGS). 1967.Mt. Baldy, Cucamonga Peak, Guasti, and Ontario, California topographic quadrangle maps.
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BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L SA SEPTEMBER 2024 UPLAND, CALIFORNIA

APPENDIX A
FIGURES 1-5
Figure 1: Project Location and Vicinity
Figure 2: Conceptual Site Plan
Figure 3: Soils
Figure 4:Vegetation, Land Cover, and Photo Points
Figure 5: Representative Site Photographs
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I:\2024\20241723\GIS\4,ro15an Anton[o Water Company Headquarters\San Antonio Water Company Headquarters.aprx(8/21/2024) Page 732 of 1374

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SOURCE:CEDG,Inc. Conceptual Site Plan I:\2024\20241723\G\Site_Plan.ai (6/20/2025) Page 733 of 1374

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r■ Soils
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ti
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FEET
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SOURCE:Google Maps(2023)
I:12024\20241723\GIS\Pro\San Antonio Water Company Headquarters\San Antonio Water Company Head quarters.aprx(8/210024) Page 734 of 1374

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SOURCE:Google Maps(2023)
1:12024\20241723\GIS\Pro\Sen Antonio Water Company Headquarters\San Antonio Water Company Headquarters.aprx(8/21/2024) Page 735 of 1374

I:\2024\20241723\G\PhotoPage.cdr (8/19/2024)
Site Photographs
San Antonio Water Company Headquarters
FIGURE 5

Page 1 of 3 ends

Photograph 1: View looking southeast along western
boundary of Project site.

Photograph 2: View looking west along
eastern boundary of Project site.

LSA

Page 736 of 1374 ends

I:\2024\20241723\G\PhotoPage.cdr (8/19/2024)
Site Photographs
San Antonio Water Company Headquarters
FIGURE 5

Page 2 of 3 ends

Photograph 2.1: View looking northeast where Project
road will exist.

Photograph 3: View looking west at scale broom scrub
and where Project road will exist.

LSA

Page 737 of 1374 ends

I:\2024\20241723\G\PhotoPage.cdr (8/19/2024)
Site Photographs
San Antonio Water Company Headquarters
FIGURE 5

Page 3 of 3 ends

Photograph 4: View looking north along eastern
boundary of Project site.

Photograph 5: View looking east along western
boundary of Project site.

LSA

Page 738 of 1374 ends

BIOLOGICAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS L SA SEPTEMBER 2024 UPLAND, CALIFORNIA

APPENDIX B

VASCULAR PLANT SPECIES OBSERVED
LSA biologist Chrissy Kent observed the following vascular plant species on the Project site.

EUDICOT FLOWERING PLANTS
Asteraceae _ Sunflower family
Erigeron bonariensis* _ _ Flax-leaved horseweed
Lepidospartum squamatum Scalebroom
Chenopodiaceae Salt family
Chenopodium sp.* Clammy goosefoot
Crassulaceae Stonecrop family
Crassula connata Sand pygmyweed
Geraniaceae Geranium family
Erodium cicutarium* Redstem stork's bill
Portulacaceae Purslane family
Portulaca oleracea* Common purslane
Zygophyllaceae Gallweed family
Tribulus terrestris* Puncture vine

MONOCOT FLOWERING PLANTS
Poaceae Grass family
Bromus rubens* Red brome
Schismus barbatus* Common Mediterranean grass
* Introduced species not native to California
Taxonomy and scientific nomenclature generally conform to Baldwin, B.G., D.H. Goldman et al., eds. (2012;The Jepson Manual: Vascular Plants of California, 2nd edition; University of California Press, Berkeley and Los Angeles, California).

Common names for each taxa generally conform to Roberts, F.M.,Jr. (2008;The Vascular Plants of Orange County, California: An Annotated Checklist; F.M. Roberts Publications, San Luis Rey, California) except where Abrams, L. (1923, 1944, and 1951; Illustrated Flora of the Pacific States:

Washington, Oregon, and California,vols. I—III; Stanford University Press, Stanford, California) and Abrams, L. and Ferris, R.S. (1960; Illustrated Flora of the Pacific States: Washington, Oregon, and California, vol. IV; Stanford University Press, Stanford, California)were used, particularly when species-specific common names were not identified in Roberts, F.M.,Jr. (2008). \\eznasunifilerl\projects\20241723_Sen Antonio Driveway Expansion\PRODUCTS\Technical Studies\Biological Resources\Draft Report\20241723_SAWH_BRA_Report.doe,(09/03/24) B-1

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INITIAL STIIOYJMl1ISATED NEGATIVE DECLARATION SAN ANTONI❑WATER COMPANY HEADQUARTERS PRo ECT ` s A AUGUST 2025 UPLAND,CALIFORNIA r`.

APPENDIX C

CULTURAL RESOURCES ASSESSMENT
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CULTURAL RESOURCES ASSESSMENT

SAN ANTONIO WATER COMPANY HEADQUARTERS PROJECT

UPLAND, SAN BERNARDINO COUNTY, CALIFORNIA
L SA
September 2024

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CULTURAL RESOURCES ASSESSMENT

SAN ANTONIO WATER COMPANY HEADQUARTERS PROJECT

UPLAND, SAN BERNARDINO COUNTY, CALIFORNIA
Prepared for:

San Antonio Water Company
139 North Euclid Avenue
Upland, California 91786
Prepared by:

Casey Tibbet, M.A., and Riordan Goodwin, RA
LSA Associates, Inc.
1500 Iowa Avenue, Suite 200
Riverside, California 92507
(951) 781-9310
LSA Project No. 20241723
National Archaeological Database Information:

Type of Study: Records Search, Survey, Architectural Evaluation USGS Quadrangle: Mt ealdy, California
Acreage: 5.12
L SA
September 2024

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CULTURAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS PROJECT L SA SEPTEMBER 2 02 4 UPLAND, CALIFORNIA

MANAGEMENT SUMMARY
LSA conducted a cultural resources assessment for the proposed San Antonio Water Company (SAWCo) Headquarters Project(Project) located at the southeast corner of East 20th Street and Flower Court (Assessor's Parcel Number [APN] 1044-091-22) in Upland, San Bernadino County, California.The subject property is approximately 5 acres in size and is currently developed with an underground water reservoir tank and related infrastructure.The Project involves developing an undeveloped portion of the subject property into a new headquarters for SAWCo, which will include two new buildings, a driveway from the intersection of Campus Avenue and East 20th Street, a vehicle gate, employee and visitor parking, a solar cover over the employee parking area, landscaping, and a citrus grove.The City of Upland (City), as Lead Agency for the Project, required this study as part of the environmental review process to comply with the California Environmental Quality Act (CEQA).

The purpose of the study is to provide the City with the necessary information and analysis to determine, as mandated by CEQA, whether the Project would cause substantial adverse changes to any historical/archaeological resources that may exist in or around the Project area. In order to identify and evaluate such resources, LSA conducted a historical/archaeological resources records search, pursued historical background research, and carried out intensive-level field surveys.

No archaeological resources are documented within 0.5 mile of the Project area, and none were identified during the archaeological survey. Despite the lack of surface visibility,the parcel has been severely disturbed, and the sensitivity for subsurface resources appears low.

One historic-period (50 years of age or older) built environment resource, a 1930 water reservoir, was documented in the Project area and evaluated under the criteria for listing in the California Register of Historical Resources (California Register) and for designation as a Cultural Resource under the City's Historic Preservation Ordinance (Chapter 17.26 of the City of Upland Municipal Code; Appendix A).As a result of this evaluation, LSA recommends that the water reservoir is not eligible for listing in the California Register or for designation under the local ordinance.

Through the various avenues of research,this study did not encounter any"historical resources," as defined by CEQA within the Project area.Therefore, LSA recommends to the City a finding of No Impact regarding cultural (historic or prehistoric) resources. No further cultural resources investigation and no mitigation measures are recommended for the Project unless development plans undergo such changes as to include areas not covered by this study. However, standard regulatory compliance measures regarding buried cultural resources are required in conformance with Section 15064.5(e) of the State CEQA Guidelines, Public Resources Code (PRC) Section 5097.98, and State Health and Safety Code Section 7050.5.

If buried cultural materials are encountered during earthmoving operations associated with the Project area, all work in that area should be halted or diverted until a qualified archaeologist can evaluate the nature and significance of the finds.

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In the event human remains are encountered, State Health and Safety Code Section 7050.5 states that no further disturbance shall occur until the County Coroner has made a determination of origin and disposition pursuant to Public Resources Code Section 5097.98.The County Coroner must be notified of the find immediately. If the remains are determined to be Native American,the County Coroner will notify the Native American Heritage Commission (NAHC),which will determine and notify a Most Likely Descendant (MLD). With permission from the landowner or his/her authorized representative,the MLD may inspect the site of the discovery.The MLD shall complete the inspection within 48 hours of notification by the NAHC.The MLD will have the opportunity to offer recommendations for the disposition of the remains.

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CULTURAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS PROJECT L C A SEPTEMBER 2024 UPLAND,CALIFORNIA J`(`

TABLE OF CONTENTS
MANAGEMENT SUMMARY i
TABLE OF CONTENTS iii
FIGURES AND TABLES iv
INTRODUCTION 1
SETTING 4
Current Natural Setting 4
Biology 4
Geology 4
Cultural Setting 4
Prehistory 4
Ethnography 5
History 5
METHODS 9
Records Search 9
Archival Research 9
Native American Consultation Assistance 9
Archaeological Field Survey 9
Architectural Survey 9
RESULTS 10
Records Search 10
Archival Research 10
Previous Studies 12
Native American Consultation Assistance 12
Archaeological Field Survey 12
Architectural Field Survey 12
SIGNIFICANCE EVALUATION 15
Definitions 15
California Register of Historical Resources 15 City of Upland—Chapter 17.26 Historic Preservation 16 Evaluation 16
RECOMMENDATIONS 19
REFERENCES 20

APPENDICES
A: DEPARTMENT OF PARKS AND RECREATION (DPR) 523 FORMS B: RECORDS SEARCH RESULTS
C: NATIVE AMERICAN CONSULTATION ASSISTANCE
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CULTURAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS PROJECT L SA SEPTEMBER 2 02 4 UPLAND, CALIFORNIA

FIGURES AND TABLES

FIGURES
Figure 1: Regional and Project Location 2
Figure 2: Project Location 3
TABLE
Table A: Cultural Resources Within 0.5 Mile 10 P:\20241723_San Antonio Driveway Expansion\PRODUCTS\Technical Studies\Cultural Resources\Draft Report\San Antonio Driveway CRA-CEQA.docx(09/19/24) iv

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CULTURAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS PROJECT L SA SEPTEMBER 2 02 4 UPLAND, CALIFORNIA

INTRODUCTION
At the request of the San Antonio Water Company(SAWCo), LSA completed a cultural resources study on approximately 5 acres of land in the northeastern part of Upland, San Bernadino County, California (see Figures 1 and 2).The subject property of the study is located at the southeastern corner of East 20th Street and Flower Court(Assessor's Parcel Number [APN] 1044-091-22) in an unsectioned portion of Township 1 North, Range 7 West, San Bernardino Baseline and Meridian, as depicted on the United States Geological Survey(USGS) Mt. Baldy, California 7.5-minute topographic quadrangle map.The study is part of the environmental review process for the proposed development of an undeveloped portion of the subject property into a new SAWCo Headquarters Project (Project).The Project proposes two new buildings, a driveway from the intersection of Campus Avenue and East 20th Street, a vehicle gate, employee and visitor parking, a solar cover over the employee parking area, landscaping, and a citrus grove.The City of Upland (City), as Lead Agency for the Project, required the study in compliance with California Environmental Quality Act (CEQA) (Public Resource Code [PRC] § 21000, et seq.) and the City's Historic Preservation Ordinance (Chapter 17.26 of the City of Upland Municipal Code).

LSA performed the present study to provide the City with the necessary information and analysis to determine, as mandated by CEQA, whether the proposed Project would cause substantial adverse changes to any historical/archaeological resources that may exist in or around the Project area. In order to identify and evaluate such resources, LSA conducted a historical/archaeological resources records search, pursued historical background research, and carried out intensive-level field surveys.

This report is a complete account of the methods, results, and final conclusion of the study.

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CULTURAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS PROJECT L SA SEPTEMBER 2 02 4 UPLAND, CALIFORNIA

SETTING

CURRENT NATURAL SETTING
Biology
At an elevation of approximately 1,600 feet above mean sea level (amsl), the Project is within the Lower Sonoran Life Zone of California (Schoenherr 1992), which ranges from below sea level to 3,500 feet amsl. Species such as mustard, red brome, Russian thistle, hare oats, and xeric grasses were noted on the property. Common animals of this region include rodents, rabbits, coyotes, raptors, reptiles,vultures, and insects.

Geology
The Project is located at the northern end of the Peninsular Ranges Geomorphic Province that extends from the Transverse Ranges to the tip of Baja California and includes the Los Angeles Basin (California Geological Survey 2002; Norris and Webb 1976).This region is characterized by a series of mountain ranges separated by northwest-trending valleys subparallel to faults branching from the San Andreas Fault.The geology of this province is similar to that of the Sierra Nevada, with numerous rock outcroppings useful to the Native Americans for resource milling, shelter, and ceremonial art.

CULTURAL SETTING
Prehistory
Chronologies of prehistoric cultural change in Southern California have been attempted numerous times, and several are reviewed in Moratto (1984). No single description is universally accepted, as the various chronologies are based primarily on material developments identified by researchers familiar with sites in a particular region and variation exists essentially due to the differences in those items found at the sites. Small differences occur over time and space, which combine to form patterns that are variously interpreted.

Currently,two primary regional culture chronology syntheses are commonly referenced in the archaeological literature.The first, Wallace (1955), describes four cultural horizons or time periods:

Horizon I—Early Man (9000-6000 BC), Horizon II— Milling Stone Assemblages (6000-3000 BC), Horizon III—Intermediate Cultures (3000 BC—AD 500), and Horizon IV— Late Prehistoric Cultures (AD 500—historic contact).This chronology was refined (Wallace 1978) using absolute chronological dates obtained after 1955.

The second cultural chronology(Warren 1968) is based broadly on Southern California prehistoric cultures and was also revised (Warren 1984; Warren and Crabtree 1986). Warren's (1984) chronology includes five periods in prehistory: Lake Mojave (7000-5000 BC), Pinto (5000-2000 BC), Gypsum (2000 BC—AD 500), Saratoga Springs (AD 500-1200), and Protohistoric (AD 1200—historic contact). Changes in settlement pattern and subsistence focus are viewed as cultural adaptations to a changing environment, which begins with gradual environmental warming in the late Pleistocene, continues with the desiccation of the desert lakes,followed by a brief return to pluvial conditions, P:\20241723_San Antonio Driveway Expansion\PRODUCTS\Technical Studies\Cultural Resources\Draft Report\San Antonio Driveway CRA-CEQA.docx(09/19/24) 4

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and concludes with a general warming and drying trend, with periodic reversals that continue to the present (Warren and Crabtree 1986).

Ethnography
The study area is within the traditional cultural territory of the Gabrielino (Kroeber 1925; Heizer 1968).Tribal territories were somewhat fluid and changed over time.The first written accounts of the Gabrielino are attributed to the Spanish mission fathers, and later documentation was by Johnston (1962), Blackburn (1962-1963), Hudson (1971), and others.

Gabrielino
The territory of the Gabrielino included portions of Los Angeles, Orange, and San Bernardino counties during ethnohistoric times, and extended inland into northwestern Riverside County (Kroeber 1925; Heizer 1968). It encompassed an extremely diverse environment that included coastal beaches, lagoons and marshes, inland river valleys, foothills and mountains (Bean and Shipek 1978).

The Gabrielino caught and collected seasonally available food resources, and led a semi-sedentary lifestyle, living in permanent communities along inland watercourses and coastal estuaries.

Individuals from these villages took advantage of the varied resources available. Groups moved to temporary camps on a seasonal rotation to collect plant foods such as acorns, buckwheat, chia, berries, and fruits, and to conduct communal rabbit and deer hunts.They also established seasonal camps along the coast and near bays and estuaries to gather shellfish and hunt waterfowl (Hudson 1971).

The Gabrielino lived in small communities, which were the focus of family life. Patrilineally linked, extended families occupied each village (Kroeber 1925; Bean and Smith 1978). Both clans and villages were apparently exogamous, marrying individuals from outside the clan or village (Heizer 1968). Gabrielino villages were politically independent and were administered by a chief, who inherited his position from his father. Shamans guided religious and medical activities,while group hunting or fishing was supervised by individual male specialists (Bean and Smith 1978).

The nearest historically known Native American village to the Project area was the Gabrielino community of Tooypinga (also described to Alfred Kroeber as Toibi), 2.7 miles to the south in the general area of Pomona (Kroeber 1925; McCawley 1996).

History
The historic period in California is generally divided into three periods: Spanish/Mission (1776- 1821), Mexican/Rancho (1821-1846), and American (1846—present). Because the resource being evaluated dates to 1933 (Historicaerials.com var),the early periods are only briefly discussed.

Instead, the following historical overview is focused on the settlement and development of Upland.

Spanish, Mexican, and Early American Periods
Upland is situated along a trail once used by Native Americans and Spanish missionaries now known as the Old Spanish Trail (Masters 2011). In 1774,Juan Bautista de Anza, a Spanish explorer, P:\20241723_San Antonio Driveway Expansion\PRODUCTS\Technical Studies\Cultural Resources\Draft Report\San Antonio Driveway CRA-CEQA.docx(09/19/24) 5

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CULTURAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS PROJECT L SA SEPTEMBER 2024 UPLAND, CALIFORNIA
established an overland route from Arizona to California that passed through today's Upland en route to the San Gabriel mission (Anonymous 2024a).This route was later used for expeditions that founded San Francisco and Los Angeles (Ibid.). Mission San Gabriel became an important place for expeditions traveling between Arizona and California since it was the first place where supplies could be obtained after crossing the desert (Ibid.). In 1810, under the leadership of Padre Dumetz, a collection of missionaries, soldiers, and Native Americans from the mission set out to locate an intermediary spot for a supply station, which they found in an area they named the San Bernardino Valley(Ibid.).They also named the area around Upland Cucamonga (Ibid.).

In 1821, Mexico won independence from Spain and gained control over California. In 1826,Jedediah Smith was the first American to enter California overland (Anonymous 2024a). He pioneered the route over the Cajon Pass and then followed Anza's route to San Gabriel.A few years later, in 1829, Antonio Armijo led an expedition from Santa Fe, New Mexico,that partially followed Smith's and Anza's routes (Ibid.).The success of this trip resulted in commerce between Santa Fe and Los Angeles, which meant travelers crossed through Cucamonga, Upland, and El Monte on their journeys (Ibid.).

During the Spanish Period, the Mission San Gabriel had established the area around today's Upland as grazing land for their cattle (Anonymous 2024b). In 1839, during the Mexican Period,this area was granted to Tiburcio Tapia by the Mexican governor (Ibid.). Known as the Cucamonga Rancho, it consisted of approximately 13,000 acres and formed parts of today's cities of Rancho Cucamonga and Upland.

In 1846, California became part of the United States.The Gold Rush of 1849 brought numerous settlers to California, but the Upland area remained relatively uninhabited and primarily used for grazing into the early 1880s.

City of Upland
Except where noted, the following was excerpted from the History of Early Upland (Upland Heritage 2024).

The Cucamonga Rancho changed hands several times, but, as noted above,the area that present- day Upland occupies was little more than an uninhabited ranchland and a place to pass through until the arrival of George and William Chaffey in 1882. George Chaffey, a Canadian shipbuilder from the province of Ontario, had already established the Etiwanda irrigation community in 1881, irrigating the land with a series of flumes that carried water from the mountains to a reservoir from which water would then be sent to the relative land sites. In 1882, Chaffey purchased 6,216 acres of land in the Cucamonga Rancho, along with significant water rights from San Antonio Creek, for $60,000.Additional purchases brought the size of the land to over 8,000 acres for a total purchase price of$90,000.The Chaffeys' master plan called for distributing the water over the whole tract to each farm lot in cement pipes, with each holder to share in the water proportionately to his holding irrespective of distance from the source. Also in 1882, the Chaffeys laid out the main thoroughfare for the "Model Irrigation Colony" (also known as Ontario) which ran from one end of the settlement to the other (City of Ontario 2013).The thoroughfare was named Euclid in honor of George's favorite mathematician.

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Euclid Avenue, which is approximately 0.25 mile west of the Project area, was 7 miles long and planned as a 200-foot-wide avenue with a center parkway flanked by a 65-foot-wide drive on each side.The avenue stretched from the colony's southernmost boundaries to the "tableland at the mouth of San Antonio Canyon on the north," an ideal location for gravity irrigation (City of Ontario n.d.).The first 4 miles of the avenue were completed in 1884 (City of Ontario 2013). Chaffey also planned for electricity in Ontario with streetlights being placed 1 mile apart on Euclid and an electric streetcar that would travel up and down the avenue daily.

Ontario was available for settlement on November 1, 1882. During the first week, Chaffey sold 190 acres for a total value of$28,500. To ensure the success of this irrigation plan and to appeal to potential land buyers, the Chaffeys created a "mutual water company" in which each landowner became a stockholder.The San Antonio Water Company was incorporated on October 25, 1882.The Ontario colony eventually became known for its citrus groves, but in 1882, orange trees were too scarce and expensive at $100 an acre to turn to citrus, so at first other types of fruit were planted.

By 1884, Ontario Nursery owner D.A. Shaw reported that there were 40,000 peach trees, 29,000 pear trees, 15,000 seedling apple trees, 16,000 grafted apple trees, 1,000 cherry trees, and 16,000 grape cuttings set out in orchards and vineyards. However, by 1889, some 2,000 acres of citrus orchards had been planted in Ontario, and Ontario was rated as having the second largest citrus acreage in the State.

The present-day City was originally the northern part of Chaffey's Ontario Model Colony and was known as North Ontario and sometimes as Magnolia after a local hotel. Many documents (e.g., deeds and census records) refer to the area as Mongolia Township, but it was Magnolia Tract that was the correct reference. However, there was another city in California named Magnolia, so the name had to be changed.The name Upland was first used as the name of the Upland Citrus Association, but by 1902,the entire area of North Ontario was referred to as Upland.

The railway came to North Ontario in 1887. When the Ontario Colony was founded, downtown was located next to the Southern Pacific tracks. In 1887,the Atchison,Topeka, and Santa Fe completed its connection adjacent to the newly founded Magnolia Tract in North Ontario. Subdividers of Magnolia,the Bedford Brothers, announced plans to erect a depot at the foot of Second Avenue, the primary business street. A notice in the December 1887 Ontario Record indicated that the cost of the station would be$7,000. In the next decades numerous packing houses were built close to the tracks on both sides of A Street, nearly 3 miles south of the Project area. Used for commuting of residents and tourists as well as for freight,the railroad linked Upland to Los Angeles to the west and the rest of the Santa Fe network to the east.

Ontario officially incorporated in 1891, but the size of incorporation was relatively small: half of a square mile bordered by the Southern Pacific tract to the south, G Street to the north, Sultana Avenue to the east, and Vine Avenue to the west. In 1901, residents of Ontario learned that those living in North Ontario were also thinking of incorporating as their own city.To eliminate this possibility,the City expanded their half of a square mile to over 10 square miles. When Ontario started to push for a larger area of incorporation, Upland residents expressed concern.The area that Ontario wanted included the Upland Post Office; the tracks for the Atchison,Topeka, and Santa Fe Railroad; and the train depot. On March 12, 1906,the San Bernardino Board of Supervisors conducted a 2-day hearing and agreed that a vote for incorporation should take place. On May 5, P:\20241723_San Antonio Driveway Expansion\PRODUCTS\Technical Studies\Cultural Resources\Draft Report\San Antonio Driveway CRA-CEQA.docx(09/19/24) 7

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1906, Upland approved their vote for incorporation with 183 in favor and 19 against.The City was officially created on May 15, 1906, by the Secretary of State in Sacramento. In 1935, Upland's boundary lines were redrawn to include the land that was annexed in Ontario's 1902 expansion.

In the decade following incorporation,the City built its first hospital (1907), and the local citizens created a volunteer fire department (1911) and built the City's first fire station (1915) (Anonymous 2024a). In 1912, the National Old Trails Road (NOTR) was established as the first national coast-to- coast highway, and it ran through Upland along today's Foothill Boulevard (Ibid.).The NOTR followed the early Spanish explorers' route, and, in 1926, the western portion became part of Route

66. A mule-pulled trolley, which was later converted to electricity, went from Ontario to Upland along the Euclid Avenue median; it was discontinued in 1928 (Ibid.).The citrus industry thrived in Upland and neighboring communities throughout the early part of the 20th century and was the dominate crop by the 1930s (Ibid.).At the height of production, the California citrus "industry produced sixty percent of the nation's citrus and twenty percent of the world's supply" (Ibid.).This success continued until the end of World War II when land values increased dramatically and citrus groves throughout Southern California gave way to housing tracts.The San Bernardino Freeway (Interstate 10) was completed in 1954, reducing travel time between San Bernardino and Los Angeles and accelerating Upland's transition from a rural, citrus growing community to the suburban city it is today(Ibid.).

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CULTURAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS PROJECT L SA SEPTEMBER 2024 UPLAND, CALIFORNIA

METHODS

RECORDS SEARCH
On July 11, 2024, a cultural resources record search was conducted for the Project area at the South Central Coastal Information Center(SCCIC) at California State University, Fullerton. It included a review of all recorded historic and prehistoric archaeological sites and cultural resource reports within 1 mile of the Project area.

ARCHIVAL RESEARCH
LSA completed archival research during the months of August and September 2024. Research methodology focused on the review of a variety of primary and secondary source materials relating to the history and development of the Project area. Sources included, but were not limited to, online sources, published literature in local and regional history, news articles, historic aerial photographs, and historic maps.

NATIVE AMERICAN CONSULTATION ASSISTANCE
On July 8, 2024,the results of a request for a search of the Sacred Lands File (SLF)were received from the Native American Heritage Commission (NAHC), who indicated that the results in the vicinity of the Project area were positive and provided a list of 25 recommended contacts representing local Native American tribes. Pending finalization of initial contact letters, all of the contacts designated by the NAHC, along with four individuals representing three groups specified by the City, will be notified via official letters by the City to solicit Section 106,Assembly Bill (AB) 52, and Senate Bill (SB) 18 consultation (see Appendix C for details of the SLF search and a representative sample of draft letters to tribes).

ARCHAEOLOGICAL FIELD SURVEY
The pedestrian survey for the Project was conducted on July 30, 2024, by LSA Archaeologist Cassidy Sharp utilizing 10-meter transects.The Project site was photographed using a digital format camera.

ARCHITECTURAL SURVEY
On August 6, 2024, LSA architectural historian Casey Tibbet and field photographer Dennis Lechner conducted the intensive-level architectural survey. During the survey, Mr. Lechner took digital photographs of the Project area,focusing mainly on the water reservoir. In addition, Ms.Tibbet made detailed notations regarding the materials, design characteristics, and current condition of the water reservoir. She also observed the remainder of the Project area and the adjacent properties, which include modern residences, undeveloped land, and Route 210.

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RESULTS

RECORDS SEARCH
Data from the SCCIC indicate there have been 11 cultural resource studies previously conducted within 0.5 mile of the proposed Project,4 of which included portions or the entirety of the Project area (SB-01595, SB-02530, SB-05800, and SB-057873; see Appendix B).Two cultural resources are documented within or partially within the Project area (36-006255 and 36-020141), and 12 others are recorded within 0.5 mile.All were documented in the built environment (see Table A).

Table A: Cultural Resources Within 0.5 Mile
Primary# Trinomial# Site Description Status Codes 36-006255 CA-SBR-006255/H Historic-period Cucamonga Spreading Grounds — 36-015982* Roadway segment(Euclid Avenue),route c. 1883 7W(segment in Ontario outside Project area)
36-015983 Railroad route(mule car track on Euclid Avenue)c. 1887 — 36-018105* 430 East 19th Street c.1936 commercial building 7M 36-018592 1891 North Euclid Avenue c. 1924 residence — 36-018593 1894 North Euclid Avenue c. 1908 residence — _36-018594 1936 North Euclid Avenue c. 1931 residence — 36-018595 1960 North Euclid Avenue c. 1896 residence — 36-018596 1997 North Euclid Avenue c. 1906 residence — 36-018597 2008 North Euclid Avenue c. 1912 residence — 36-018598 2009 North Euclid Avenue c. 1927 residence — 36-018599 2031 North Euclid Avenue c. 1929 residence — 36-020140 216 East 20th Street c. 1945 residence
36-020141 Reservoir(water tank)c. 1930 _
Source:South Central Coastal Information Center(2024).
*Listed in the Built Environment Resources Directory

ARCHIVAL RESEARCH
In 1882, George and William Chaffey incorporated SAWCo (Upland Heritage 2024). Intended to appeal to potential land buyers, this "mutual water company" made each landowner a stockholder and was the second mutual water company to be formed in California (Ibid.; SAWCo 2024a).

A December 1882 news article stated that SAWCo would "construct a reservoir on the northern part of the colony of Ontario"that would "hold a sufficient supply for distribution over the lands sold and to be sold in said colony" (Ontario Fruit Grower 1882a). Furthermore, waters were to be conveyed from San Antonio Canyon or Creek to the reservoir"as rapidly as the lands sold" and be "ready for irrigation to the highest corner on each 10-acre lot owned by the stockholders" of the SAWCo (Ibid.).

This was to occur no later than July 15, 1883 (Ibid.). The Chaffey brothers transferred one share of stock with each acre sold (Ontario Fruit Grower 1882b).An 1882 map of the Ontario Colony Lands shows 1,023 lots, a grid pattern of streets including Euclid Avenue, a planned college campus at the northwest corner of Euclid Avenue and 4th Street, and a reservoir located in the foothills northwest of Euclid Avenue (The Claremont Colleges n.d.).

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A November 1883 news article stated that progress was being made on the Ontario water system.

According to the article, men were working day and night building an approximately 4,000-foot-long tunnel, an approximately 1,500-foot-long cement ditch, and installing nearly 3,000 feet of cement pipe (Ontario Fruit Grower 1883). In addition, more than 2,000 feet of canal was under construction from the tunnel to the north end of Euclid Avenue where waters would be dropped into a reservoir (Ibid.). By May 1884, referring to the mutual water company system used in Redlands, Etiwanda, and Ontario,the Ontario Fruit Grower stated that the system "seems to be perfect" (Ontario Fruit Grower 1884). Later articles (late 1880s into the 1890s)tout the excellent water supply as an important part of the success of Ontario as a fruit growing colony.

In summer 1928, it was reported that SAWCo adopted a recommendation that "a reservoir to equalize the flow and prevent fluctuation of the heads, be constructed on the Nineteenth street well pipe line just west of Campus avenue and Twentieth street [in the Project area] and that booster pumps be installed there and a steel booster line constructed from that point north to Twenty- second street and west thereon to San Antonio avenue.This would permit boosting water to the upper section in periods of shortage or if the East Twenty-third street pump should break down.

Estimated cost, $44,530" (The Daily Report 1928).The company also adopted recommendations to install a similar reservoir, booster pumps, and booster line on the 16th Street well pipeline and develop a well at or near 4th Avenue and San Antonio Avenue in the Chino basin (Ibid.).

According to SAWCo,the reservoir, which is known as Reservoir 1, is a 1-million-gallon tank that was built in the 1930s to provide irrigation water for the local citrus groves (SAWCo 2024b).Although no news articles regarding the construction process or its completion were found, 1930 advertisements related to Schulhof ranch reference the "new reservoir" east of Euclid Avenue and north of 19th Street (The Daily Report 1930). The Schulhof ranch residence was located on the northwest corner of 20th Street and Sapphire Street (now Flower Court).The reservoir first appears on topographic maps dated 1933 and is clearly visible in aerial photographs from 1938 (Historicaerials.com var.).

The lands adjacent to the Project area to the west and north were cultivated with agricultural uses that likely dated to at least the 1890s,when they were owned and farmed by early pioneer Hugo Sontag (San Bernardino County Sun 1923). Sontag was reportedly producing Zinfandel grapes on the property as early as 1886 and built his stone cabin there in 1889 (The Ontario Record 1886;San Bernardino County Sun 1924).The ranch was purchased from Sontag by the Schulhof family in 1923 (San Bernardino County Sun 1923). Research indicates they operated the ranch,where they grew fruits, nuts, and melons, until the mid-1970s (San Bernardino County Sun 1923, 1974).Today, Reservoir 1 is primarily used to supply nonpotable water to Holliday Rock Quarry, located approximately 400 feet to the east of the Project area,generally at the northeast corner of East 20th Street and North Campus Avenue (SAWCo 2024b).

Historic aerial photographs reveal that in 1938, lands to the north and west of the Project area were developed with groves, while the property to the south and east was largely undeveloped (Historicaerials.com var.). By the mid-1960s,there was a new water tank south of the Project area and some residential development southwest of it, but it was not until after 1985 that the nearby groves disappeared completely(Ibid.). Although there were two above-ground tanks (still extant) south of the 1930 reservoir by the mid-1990s, the Project area appears to have remained largely undeveloped (Ibid.). Route 210 was constructed adjacent to the south of the Project area by 2005; P:\20241723_San Antonio Driveway Expansion\PRODUCTS\Technical Studies\Cultural Resources\Draft Report\San Antonio Driveway CRA-CEQA.docx(09/19/24) 11

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at that time,the reservoir appears to be the only structure on site (Ibid.). The residences on East Kenwood Street and Flower Court, south of East 20th Street and adjacent to the west of the Project area,were not constructed until after 2012 (Ibid.).

Previous Studies
In 1988,the subject reservoir(36-020141)was documented and evaluated by the California Department of Transportation (Caltrans) as not eligible for listing in the National Register of Historic Places (National Register) (Parks and Gallup 1988; see Appendix A).At that time, it was noted that the reservoir was in excellent condition and still supplied irrigation water to the few remaining citrus groves in the immediate vicinity. However, it was one of many such facilities in the area and did not appear to have "made significant individual contributions to local history and development" (Parks and Gallup 1988:2).

In 1989, an Archaeological Site Record was prepared for the Cucamonga Spreading Grounds (36- 006255) located north and east of the Project area.The Archeological Site Location Map associated with that documentation includes the subject property(Hammond 1989:9).The site record states that"A concrete circular reservoir(Reservoir 1) recorded during the Historical Architectural Survey for this project is associated with the Cucamonga Spreading grounds. Water from well Nos. 14 and 19, (located east of the spreading grounds, between 19th St and 20th St),traveled to the reservoir via a 22"San Antonio Water Company Pipeline,which is aligned along Distributing Ditch No. 4" (Hammond 1989:3).The Archaeological Site Record did not evaluate the reservoir or the spreading grounds.

In 2014, a water system associated with the Cucamonga Spreading Grounds was documented on a Department of Parks and Recreation (DPR) 523 form but was not evaluated for significance (ECORP 2014).

NATIVE AMERICAN CONSULTATION ASSISTANCE
Please see Appendix C for results of the SLF search and consultation assistance. Please note consultation is an ongoing process throughout the life of the Project, and, as such,the City will continue to consult with any interested Native American Tribes as the Project moves forward.

ARCHAEOLOGICAL FIELD SURVEY
The July 30, 2024,field survey revealed that there was severe disturbance in the area caused by earth-moving and development. Although overall visibility of the surface was 100 percent, no intact native soil was exposed because it was completely obscured by a highly disturbed dirt surface and modern development (see Photos 1 through 3). Access was easily gained via gate. Construction and concrete debris were noted throughout the Project area. No cultural resources were identified.

ARCHITECTURAL FIELD SURVEY
During the architectural field survey, the following were observed in the Project area: a partially subterranean water reservoir, a modern metal building, a metal cargo container, a concrete slab with metal cabinets, large pipes,various equipment, and piles of rubble (see Photos 1 through 3).

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A solid wall surrounds the property and screens it from view from the public right-of-way. Aside from the water reservoir, all of the built environment features in the Project area are modern.The setting consists of modern single-family residences to the north and west, Route 210 to the south, and undeveloped land to the east and northeast. The historic-period water reservoir is described below. Photographs were taken by reaching over the wall.

The water reservoir is located in the northwestern part of the Project area. It is round and approximately 130 feet in diameter. Depending on the terrain, approximately 2 to 3 feet of the reservoir, including the roof, are above grade.The reservoir wall is concrete.There is a wood truss system mounted on top of the wall to support the roof.The conical roof has a very slight pitch, is sheathed with composition sheets, extends slightly beyond the reservoir walls, and has a center- mounted monitor(see Photo 1).There is a large, in-ground, elbow pipe that enters the reservoir on the west side (see Photo 1).There is also a board-formed concrete box on the northwest side of the reservoir(see Photo 1). Equipment is attached to the northeast side of the reservoir(see Photo 2).

S F
Photo 1: Water reservoir, view east(8/6/24).

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__-
Photo 2: Equipment on the northeast side of the reservoir, view southwest(8/6/24). 1 . :, ti - _
rr 1
Photo 3: Water reservoir behind(north of)modern building and equipment, view northeast(8/6/24).

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SIGNIFICANCE EVALUATION
Based on the research results discussed above,the following sections present the historical significance evaluation for the historic-period water reservoir in the Project area and the conclusion on whether it qualifies as a "historical resource" as defined by CEQA.

DEFINITIONS
CEQA(PRC Chapter 2.6, Section 21083.2 and California Code of Regulations [CCR] Title 145, Chapter 3,Article 5, Section 15064.5) calls for the evaluation and recordation of historical resources.The criteria for determining the significance of impacts to historical resources are based on Section 15064.5 of the State CEQA Guidelines and Guidelines for the Nomination of Properties to the California Register. Properties eligible for listing in the California Register of Historical Resources (California Register) and subject to review under CEQA are those meeting the criteria for listing in the California Register or National Register, or designation under a local ordinance.

California Register of Historical Resources
The California Register criteria are based on National Register criteria. For a property to be eligible for inclusion in the California Register, one or more of the following criteria must be met:

1. It is associated with the events that have made a significant contribution to the broad patterns of local or regional history, or the cultural heritage of California or the United States;

2. It is associated with the lives of persons important to local, California, or national history;

3. It embodies the distinctive characteristics of a type, period, region, or method or construction, or represents the work of a master, or possesses high artistic values; and/or

4. It has yielded, or has the potential to yield, information important to the prehistory or history of the local area, California, or the nation.

In addition to meeting one or more of the above criteria,the California Register requires that sufficient time has passed since a resource's period of significance to "obtain a scholarly perspective on the events or individuals associated with the resource." Fifty years is used as a general estimate of time needed to develop the perspective to understand the resource's significance (CCR 4852 [d][2])•
The California Register also requires that a resource possess integrity, which is defined as "the authenticity of an historical resource's physical identity evidenced by the survival of characteristics that existed during the resource's period of significance" (California Office of Historic Preservation 1999:2).To retain integrity, a resource should have its original location, design, setting, materials, workmanship,feeling, and association. Which of these factors is most important depends on the particular criterion under which the resource is considered eligible for listing (California Office of Historic Preservation 1999).

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City of Upland—Chapter 17.26 Historic Preservation
The City of Upland provides the criteria for designating a cultural resource to the Local Register (Chapter 17.26.100(F)).The cultural resource must meet one or more of the following criteria:

1. It embodies distinguishing architectural characteristics, valuable to the study of a period, style, method of construction, or the use of indigenous materials or craftsmanship.

2. It exemplifies, symbolizes, or manifests elements of the cultural, social, economic, political, or architectural history of the city.

3. It is identified with historic persons or with important events in local, state, or national history.

4. It is representative of the work or product of a notable builder, designer, or architect.

5. Its unique location or singular physical characteristics represent an established and familiar visual feature of a neighborhood.

6. It contributes to the continuity or character of a visually or thematically cohesive street, neighborhood, or area.

7. It has integrity as a natural or manmade environment that strongly contributes to the well-being of the people of the community.

EVALUATION
In summary, the Project area includes a historic-period, concrete reservoir that is predominantly subterranean. Known as Reservoir 1, it was built in 1930 by SAWCo to provide irrigation water to local citrus groves. Originally, its setting included undeveloped land to the northeast, east, and south and groves to the north, west, and southwest.Today, there are modern residential neighborhoods to the north and west, a modern section of Route 210 to the south, a small piece of undeveloped land to the east, and a rock quarry to the northeast.The reservoir's primary purpose now is to provide nonpotable water to the nearby Holliday Rock Quarry.The reservoir is evaluated below using the California Register and City criteria.

Many of the City's criteria for designation are similar to those of the California Register. Where appropriate, these have been grouped together to avoid redundancy.

California Register Criterion 1: It is associated with the events that have made a significant contribution to the broad patterns of local or regional history, or the cultural heritage of California or the United States.

City Criterion 3: It is identified with historic persons or with important events in local,state, or national history.

This reservoir is associated with SAWCo which was incorporated in 1882 and developed a water system that played a critical role in the early settlement and development of the City and P:\20241723_San Antonio Driveway Expansion\PRODUCTS\Technical Studies\Cultural Resources\Draft Report\San Antonio Driveway CRA-CEQA.docx(09/19/24) 16

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neighboring Ontario. However,this reservoir, which was built in 1930, nearly 50 years after the company incorporated, did not contribute to the early success of the community. It is one of many facilities built by the company over several decades to support the continued growth of the area. No indication was found that it made any important contributions to local history or development. It is not significant under these criteria.

California Register Criterion 2: It is associated with the lives of persons important to local, California, or national history.

City Criterion 3: It is identified with historic persons or with important events in local,state,or national history.

No evidence was found that this reservoir is associated with historically significant people. It is not significant under these criteria.

California Register Criterion 3: It embodies the distinctive characteristics of a type, period, region, or method or construction,or represents the work of a master, or possesses high artistic values.

City Criterion 4: It is representative of the work or product of a notable builder, designer, or architect.

The reservoir is identifiable as an early 20th century reservoir based on its construction materials (poured in place concrete and wood truss roof supports). However,those materials and the related methods of construction are common for the period and region. No evidence was found that the reservoir is the work of a master engineer or builder, and it does not possess high artistic values. It is not significant under these criteria.

California Register Criterion 4: It has yielded, or has the potential to yield, information important to the prehistory or history of the local area, California, or the Nation.

City Criterion 1: It embodies distinguishing architectural characteristics,valuable to the study of a period, style, method of construction,or the use of indigenous materials or craftsmanship.

The reservoir was built in 1930 using common methods and materials and is not valuable to the study of a period, style, method of construction, or the use of indigenous materials or craftsmanship. It does not have the potential to yield information important to the prehistory or history of the area. It is not significant under these criteria.

The following addresses the remaining City criteria for designation.

City Criterion 2: It exemplifies, symbolizes, or manifests elements of the cultural, social,economic, political,or architectural history of the city.

The reservoir is one element of the SAWCo water system that played an important role in the development of the Ontario and Upland communities in the late 1800s and early 1900s. As a relatively late piece of infrastructure (1930),this reservoir is not associated with the early P:\20241723_San Antonio Driveway Expansion\PRODUCTS\Technical Studies\Cultural Resources\Draft Report\San Antonio Driveway CRA-CEQA.docx(09/19/24) 17

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settlement of those communities and did not play a role in the development or success of the citrus industry. It does not exemplify or symbolize that system and is not significant under this criterion.

City Criterion 5: Its unique location or singular physical characteristics represent an established and familiar visual feature of a neighborhood.

The reservoir has existed in this location for nearly 100 years. However, there is nothing unique about its location and it does not have unusual physical characteristics that cause it to stand out.

Furthermore, because it is mostly subterranean it has never been particularly visible from beyond its immediate surroundings. For these reasons, despite its long history in this location, it is not a familiar visual feature. It is not significant under this criterion.

City Criterion 6: It contributes to the continuity or character of a visually or thematically cohesive street, neighborhood,or area.

The reservoir was constructed in 1930, when the surrounding area was developed with citrus groves.Today,the area is developed with modern homes that have no relationship to the agricultural past of the area or the reservoir. It is not significant under this criterion.

City Criterion 7: It has integrity as a natural or manmade environment that strongly contributes to the well-being of the people of the community.

The reservoir is part of the manmade environment. Originally, it contributed to the irrigation system that supported nearby citrus groves.Today, it supports the quarry located to the northeast. It is not strongly connected to the well-being of the people in the community. It is not significant under this criterion.

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RECOMMENDATIONS
The foregoing report has provided background information on the Project area, outlined the methods used in the current study, and presented the results of the various avenues of research.

The only historic-period (50 years of age or older) resource that was identified in the Project area is a mostly subterranean, concrete water reservoir that was built in 1930 as part of the irrigation system for nearby citrus groves.The reservoir was evaluated for historical significance using the criteria for listing in the California Register and designation as a City Cultural Resource. It did not meet any of the State or local criteria.

No archaeological resources are documented within a 0.5 mile, and none were identified during the archaeological survey. Despite the lack of surface visibility,the parcel has been severely disturbed and the sensitivity for subsurface resources appears low.

Throughout the course of the study, no "historical resources," as defined by CEQA,were encountered within or adjacent to the Project area.Therefore,the City may reach a finding of No Impact regarding cultural (historic or prehistoric) resources. No mitigation measures are recommended for cultural resources. However,the following standard regulatory compliance measures regarding buried cultural resources are required in conformance with Section 15064.5(e) of the State CEQA Guidelines, PRC Section 5097.98, and State Health and Safety Code Section 7050.5.
• In the event that archaeological materials are encountered during construction, all construction work should be halted and a qualified archaeologist consulted to determine the appropriate treatment of the discovery (CCR Title 14, Chapter 3, Section 15064.5(f)). • In the event human remains are encountered, State Health and Safety Code Section 7050.5 states that no further disturbance shall occur until the County Coroner has made a determination of origin and disposition pursuant to PRC Section 5097.98.The County Coroner must be notified of the find immediately. If the remains are determined to be Native American, the County Coroner will notify the NAHC, which will determine and notify a Most Likely Descendant(MLD). With permission from the landowner or his/her authorized representative, the MLD may inspect the site of the discovery.The MLD shall complete the inspection within 48 hours of notification by the NAHC. The MLD will have the opportunity to offer recommendations for the disposition of the remains.

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REFERENCES
Anonymous
2024a Upland, California. Accessed online in September 2024 at: https://en.wikipedia.org/ wiki/Upland,_California#cite_note-8.
2024b Rancho Cucamonga. Accessed online in September 2024 at: https://en.wikipedia.org/ wiki/Rancho_Cucamonga#:—:text=4%20See%20also-,History,adobe%20house%20on% 20Red%20Hill.

California Office of Historic Preservation
1999 Technical Assistance Series#6 California Register and National Register: A Comparison (for purposes of determining eligibility for the California Register). Accessed online in September 2024 at: https://ohp.parks.ca.gov/pages/1069/files/technical%20assistance% 20bulletin%206%202011%2Oupdate.pdf.

City of Ontario
n.d. Historic Preservation.Accessed online in September 2024 at: https://www.ontarioca.gov/ Planning/HistoricPreservation.
2013 Euclid Avenue Historic District. Accessed online in September 2024 at:
https://www.ontarioca.gov/sites/default/files/Ontario-Files/Planning/Historic_ Preservation/euclid_avenue.pdf.

ECORP
2014 Department of Parks and Recreation forms for P36-006255. Provided by the South Central Coastal Information Center.

Hammond, Steve
1989 Archeological Site Record P36-006255. Provided by the South Central Coastal Information Center.

Historicaerials.com
Var. Historic aerial photographs and historic topographic maps of the Project area and vicinity.

Various years reviewed. Accessed online in September 2024 at:
https://www.historicaerials.com/viewer .

Masters, Nathan
2011 New Mexico to Southern California:The Old Spanish Trail, Explained. PBS SoCal. Accessed online in September 2024 at: https://www.pbssocal.org/shows/lost-la/new-mexico-to- southern-california-the-old-spanish-trail-explained.

Ontario Fruit Grower
1882a Water Contract. Between Chaffey Brothers and San Antonio Water Company. December 4, page 1.

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1882b Ontario. The Most Attractive Settlement in Southern California. December 4, page 2. 1883 The Ontario Water System. November 28, page 3.
1884 Systems of Irrigation. May 7, page 1.

Parks, Bonnie and Aaron Gallup
1988 California Department of Transportation Architectural Inventory/Evaluation Form for 36- 020141. Provided by the South Central Coastal Information Center.

San Antonio Water Company (SAWCo)
2024a About. San Antonio Water Company website.Accessed online in September 2024 at:
https://www.sawaterco.com/about-us#:— :text=History,shareholders%20for%20over %20130%20yea rs.
2024b Personal communication via email with Brian C. Lee, General Manager/CEO, San Antonio Water Company on September 9.

San Bernardino County Sun
1923 Early Pioneer Answers Call.January 13, page 14. 1924 Fail to Locate Prized Papers. February 24, page 14. 1974 Legal advertisement.June 17, page 25.

The Claremont Colleges
n.d. Map of the Ontario Colony Lands. Model Colony Map Collection. Accessed online in September 2024 at: https://ccdl.claremont.edu/digital/collection/cwd/id/5000/rec/1 .

The Daily Report
1928 Stockholders of Concern Approve$215,000 Project.August 1, page 3. 1930 For sale advertisement. August 13, page 8.
1931 For sale advertisement. September 17, page 8.

The Ontario Record
1886 About Town. October 13, page 3.

Upland Heritage
2024 History of Early Upland. Accessed online in September 2024 at: https://uplandheritage . org/early-upland.

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APPENDIX A
DEPARTMENT OF PARKS AND RECREATION (DPR) 523 FORMS
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State of California—The Resources Agency Primary# 36-020141 DEPARTMENT OF PARKS AND RECREATION HRI#
PRIMARY RECORD Trinomial
NRHP Status Code 6Z
Other Listings
Review Code Reviewer Date

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P1. Other Identifier: San Antonio Water Company Reservoir#1 *P2. Location: 0 Not for Publication 0 Unrestricted *a. County: San Bernardino and(P2b and P2c or P2d. Attach a Location Map as necessary.)
*b. USGS 7.5'Quad: Mt. Baldy, CA Date: T 1 N; R 7W. unsectioned land, S.B.B.M. c. Address: City: Upland, CA Zip:
d. UTM: Zone: 11; mE/ mN (G.P.S.)
e. Other Locational Data: (e.g.,parcel#,directions to resource,elevation,etc.,as appropriate):APN 1044-091-22; southeast corner of East 20th Street and Flower Court, north of Route 210. *P3a. Description: (Describe resource and its major elements. Include design,materials,condition,alterations,size,setting,and boundaries) The water reservoir is located in the northwestern part of the property. It is round and approximately 130 feet in diameter.

Depending on the terrain, approximately 2 to 3 feet of the reservoir, including the roof, are above grade. The reservoir wall is concrete. There is a wood truss system mounted on top of the wall to support the roof. The conical roof has a very slight pitch, is sheathed with composition sheets, extends slightly beyond the reservoir walls, and has a center-mounted monitor. There is a large, in-ground, elbow pipe that enters the reservoir on the west side. There is also a board-formed concrete box on the northwest side of the reservoir. Equipment is attached to the northeast side of the reservoir. The reservoir appears to be in fair condition.

The property also includes a modern metal building, a metal cargo container, a concrete slab with metal cabinets, large pipes, various equipment, and piles of rubble. A solid wall surrounds the property and screens it from view from the public right-of-way.

Aside from the water reservoir, all of the built environment features on the property are modern. The setting consists of modern single-family residences to the north and west, Route 210 to the south, and undeveloped land to the east and northeast. *P3b. Resource Attributes: (Original uses) HP22-Reservoir *P4. Resources Present: Building ❑Structure ❑Object ❑Site ❑District ❑Element of District ❑Other(Isolates,etc.) P5a. Photo or Drawing (Photo required for buildings,structures,and objects.) P5b. Description of Photo: (View, date,accession#) Reservoir#1,
view east(8/6/24)
$ *P6. Date Constructed/Age and
1 Sources: ❑x Historic
❑Prehistoric ❑Both
_ 1930 (The Daily Report 1928 and
'
1930)
_ *P7. Owner and Address:
• San Antonio Water Company
139 North Euclid Avenue
:'_fir Upland, CA 91786
- �- *P8. Recorded by: (Name,
affiliation,and address)
Casey Tibbet, M.A.

LSA Associates, Inc.
1500 Iowa Avenue, Suite 200
Riverside, CA 92507
*P9. Date Recorded:

August 6, 2024
*P10. Survey Type: (Describe) Intensive-level CEQA compliance *P11. Report Citation: (Cite survey report and other sources, or enter "none.") Cultural Resources Assessment, San Antonio Water Company Headquarters, City of Upland, San Bernardino County, California. Prepared by LSA Associates, Inc. in 2024. *Attachments: ❑NONE x❑Location Map ❑Sketch Map ❑O Continuation Sheet ❑x Building, Structure, and Object Record ❑Archaeological Record ❑District Record ❑Linear Feature Record ❑Milling Station Record ORock Art Record ❑Artifact Record ❑Photograph Record 0 Other(List):

DPR 523A(1/95) FeirrT Y Mn1a3iaM

State of California—The Resources Agency Primary# 36-020141 DEPARTMENT OF PARKS AND RECREATION HRI#

BUILDING, STRUCTURE, AND OBJECT RECORD

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*Resource Name or#(Assigned by recorder) Reservoir#1 B1. Historic Name:

B2. Common Name:

B3. Original Use: Reservoir B4. Present Use: Reservoir *B5. Architectural Style: Utilitarian
*B6. Construction History: (Construction date,alterations,and date of alterations) No original permits or plans for this reservoir were found. According to the San Antonio Water Company, it was built in the 1930s (San Antonio Water Company 2024). A search of news articles found that in summer 1928, the San Antonio Water Company adopted a recommendation that "a reservoir to equalize the flow and prevent fluctuation of the heads, [should] be constructed on the Nineteenth street well pipe line just west of Campus avenue and Twentieth street [location of subject property] and that booster pumps [should] be installed there and a steel booster line constructed from that point north to Twenty-second street and west thereon to San Antonio avenue. This would permit boosting water to the upper section in periods of shortage or if the East Twenty-third street pump should break down. Estimated cost, $44,530" (The Daily Report 1928). Although no news articles regarding the construction process or its completion were found, 1930 advertisements related to Schulhof ranch reference the "new reservoir" east of Euclid Avenue and north of 19th Street (The Daily Report 1930). The Schulhof ranch residence was located on the northwest corner of 20th and Sapphire Streets (now Flower Court).

The reservoir first appears on topographic maps dated 1933 and is clearly visible in aerial photographs from 1938 (Historicaerials.com var.).
*B7. Moved? ONo ❑Yes ❑Unknown Date: Original Location:
*B8. Related Features: A modern metal building, a metal cargo container, a concrete slab with metal cabinets, large pipes, and various equipment.

B9a.Architect: None found b. Builder: San Antonio Water Company *B10. Significance: Theme: Area:

Period of Significance: Property Type: Applicable Criteria: NA (Discuss importance in terms of historical or architectural context as defined by theme,period,and geographic scope.Also address integrity.) This 1930 concrete reservoir does not meet the criteria for listing in the California Register of Historical Resources (California Register)or designation under the City of Upland Cultural Resources ordinance. It is not a"historical resource"for purposes of the California Environmental Quality Act(CEQA). (See Continuation Sheet) Historic Context. Refer to the related report(see P11 on page 1).

B11. Additional Resource Attributes: (List attributes and codes) *B12. References:

Historicaerials.com
Var. Historic aerial photographs and historic topographic maps of the project area and vicinity. Various years reviewed.

Accessed online in September 2024 at:
https://www.historicaerials.com/viewer .
(Sketch Map with north arrow required.)
San Antonio Water Company
2024 Personal communication via email with Brian C. Lee, General Manager/CEO, San Antonio Water Company on September 9. Refer to Location Map The Daily Report
1928 Stockholders of Concern Approve $215,000 Project. August 1, page 3.
1930 For sale advertisement.August 13, page 8.

B13. Remarks:
*B14. Evaluator: Casey Tibbet, M.A., LSA Associates, Inc., 1500 Iowa Avenue, Suite 200, Riverside, CA 92507
(This space reserved for official comments.)
*Date of Evaluation: September 2024
DPR 523B(1/95) * equire information

Page 7 ends

State of California-The Resources Agency
DEPARTMENT OF PARKS AND RECREATION Primary# 36-020141 CONTINUATION SHEET HRI#
Trinomial

Page 3 of 5 ends

*Recorded by LSA Associates, Inc. *Date: September 2024 X Continuation Update *B10. Significance (continued from page 2)
This resource is being evaluated under the criteria for listing in the California Register and designation as a City of Upland Cultural Resource (Chapter 17.26.100(F) of the City's Municipal Code). Many of the City's criteria for designation are similar to those of the California Register. Where appropriate, these have been grouped together to avoid redundancy.

City Criterion 3: It is identified with historic persons or with important events in local, state,or national history.

This reservoir is associated with the San Antonio Water Company, which was incorporated in 1882 and developed a water system that played a critical role in the early settlement and development of Upland and neighboring Ontario. However, this reservoir, which was built in 1930, nearly 50 years after the company incorporated, did not contribute to the early success of the community. It is one of many facilities built by the company over several decades to support the continued growth of the area. No indication was found that it made any important contributions to local history or development. It is not significant under these criteria.

California Register Criterion 2: It is associated with the lives of persons important to local, California, or national history.

City Criterion 3: It is identified with historic persons or with important events in local, state,or national history.

No evidence was found that this reservoir is associated with historically significant people. It is not significant under these criteria.

California Register Criterion 3: It embodies the distinctive characteristics of a type, period, region, or method or construction, or represents the work of a master,or possesses high artistic values.

City Criterion 4: It is representative of the work or product of a notable builder,designer,or architect.

The reservoir is identifiable as an early 20th century reservoir based on its construction materials (poured-in-place concrete and wood truss roof supports). However, those materials and the related methods of construction are common for the period and region. No evidence was found that the reservoir is the work of a master engineer or builder, and it does not possess high artistic values. It is not significant under these criteria.

California Register Criterion 4: It has yielded, or has the potential to yield, information important to the prehistory or history of the local area, California,or the Nation.

City Criterion 1: It embodies distinguishing architectural characteristics, valuable to the study of a period, style, method of construction, or the use of indigenous materials or craftsmanship.

The reservoir was built in 1930 using common methods and materials and is not valuable to the study of a period, style, or method of construction, or the use of indigenous materials or craftsmanship. It does not have the potential to yield information important to the prehistory or history of the area. It is not significant under these criteria.

The following addresses the remaining City criteria for designation.

City Criterion 2: It exemplifies, symbolizes, or manifests elements of the cultural, social, economic, political, or architectural history of the city.

The reservoir is one element of the San Antonio Water Company water system that played an important role in the development of the Ontario and Upland communities in the late 1800s and early 1900s. As a relatively late piece of infrastructure (1930), this reservoir is not associated with the early settlement of those communities and did not play a role in the development or success of the citrus industry. It does not exemplify or symbolize that system and is not significant under this criterion.

City Criterion 5: Its unique location or singular physical characteristics represent an established and familiar visual feature of a neighborhood.

The reservoir has existed in this location for nearly 100 years. However, there is nothing unique about its location and it does not have unusual physical characteristics that cause it to stand out. Furthermore, because it is mostly subterranean it has never been particularly visible from beyond its immediate surroundings. For these reasons, despite its long history in this location, it is not a familiar visual feature. It is not significant under this criterion.

See Continuation Sheet
DPR 523L(1/95) *Required Information

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State of California-The Resources Agency
DEPARTMENT OF PARKS AND RECREATION Primary# 36-020141 CONTINUATION SHEET HRI#
Trinomial

Page 4 of 5 ends

*Recorded by LSA Associates, Inc. *Date: September 2024 X Continuation Update *B10. Significance (continued from page 3)
City Criterion 6: It contributes to the continuity or character of a visually or thematically cohesive street, neighborhood, or area.

The reservoir was constructed in 1930, when the surrounding area was developed with citrus groves. Today, the area is developed with modern homes that have no relationship to the agricultural past of the area or the reservoir. It is not significant under this criterion.

City Criterion 7: It has integrity as a natural or manmade environment that strongly contributes to the well-being of the people of the community.

The reservoir is part of the manmade environment. Originally, it contributed to the irrigation system that supported nearby citrus groves.

Today, it supports the quarry located to the northeast. It is not strongly connected to the well-being of the people in the community. It is not significant under this criterion.

DPR 523L(1/95) *Required Information

Page 773 of 1374 ends

State of f'alifornia-Resource Agency Primary# 36-020141 DEPARTMENT OF PARKS AND RECREATION HRI#
LOCATION MAP Trinomial

Page 5 of 5 ends

*Map Name:USGS 7.5'Quad.Mt.Baldy;Nearmap *Scale: 1:24000 *Date of Map: 1988;2024 7,
, f• -!.1rL-1•;=:4"i4r:-1"i"-r-.N-.4 ivc—..-0-,_-4--.-*„.r..,7 71 r.'ti i �' �ta:.:lr` ...
`j y M .} 1 1 -= i .... 1''- • %• 7� ..r `■ r M1 3. i "pe,t .,: ^sal . .72'.
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riTi 10 L. _Frit, ../ . ' L' / .\-- — — / ...Will V->_,_--- ---„,-,.-.,.. , , ..'.r, ,' All , .., y `. M1— s flis rt [ � ' �i:..t, �a ;r' ift, )
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1000 0 1000 2000 3000 4000 5000 6000 7000 FEET N {a a ci, • 15
F . •may .. �y .—. 0 y. 1 KILOMETER f I I'I I f I:.2024,20241723',GIS\Pro+San Antonio Waller t'mnpany 1-leadyuarterti.San Antonio Wa[cr Company Headquarlers.aprx(8/23/2024) DPR323J (1/95) *IQ ge47Y4of„1t3 4

CALIFORNIA DEPARTMENT OF TRANSPORTATION
ARCHITECTURAL INVENTORY/EVALUATION FORM MAP REFERENCE NO. 31 County - Route - Postmile: Sad-30 0.0/22.8 ( ) LISTED ( ) DETERMINED ELIGIBLE ( ) APPEARS ELIGIBLE (xx ) APPEARS INELIGIBLE
L IDENTIFICATION Pf PrQ.T 0F Z62-(pc)557/7 (a-00 i.7S

1.Common Name: Reservoir

2.Historic Name: Unknown

3.Street or rural address: South side of 20th Street, east of Euclid Avenue lit
City: Upland Zip Code: 91786 County: San Bernardino

4.Parcel Number: 1044-091-01 Present Owner: San Antonio Water Company II Address: P. 0. Box 877 City: Upland Zip Code: 91786

5.Ownership Is: ( ) Public ( x ) Private
II6.Present Use: Reservoir Original Use: Reservoir

IDESCRIPTION
7a.Architectural Style: nla
I 7b.Brlefly describe the present PHYSICAL CONDITION of the site or structure and describe any major alterations from its original condition:

This large, circular reservoir is covered by a low pitched conical roof with a monitor in the center. The reservoir is concrete. The roof is supported on evenly spaced 2x4s with occasional diagonal braces between them, providing a one foot air space between the reservoir and the roof. The roof surface is rolled composition. There is a dry laid cobblestone retaining wall on the southwest perimeter of the reservoir. Below the retaining wall on the south is a concrete settling tank, Immediately to the southwest of the tank is a corrugated metal pumping plant, with a cross Igable roof,on which is inscribed "SAW. Co. B.1" (San Antonio Water Company). The property is surrounded by a chain link fence.

8. Construction date
Estimated: (1930) Factual: ( )
I 9. Architect: Unknown

10. Builder: Unknown

71. Approx.properly size(in feet)
I - Frontage: 695' Depth: 62T

12. Date(s)of enclosed photograph(s):

November 1988
f'

Page 775 of 1374 ends

-o!o/ 1/
I •

13.Condltion: Excellent ( x ) Good ( ) Fair ( ) Deteriorated ( )

14.Alteratlons: As noted in item 7b.

15.Surroundings: (Check more than one if necessary) Open land ( x ) Scattered buildings ( ) Densely built-up ( ) Residential ( x ) Industrial ( ) Commercial ( ) Other:

16.Threats to site: None known ( ) Private Development ( ) Zoning ( ) Vandalism ( ) Public Works Project (x )

17.1s the structure: On its original site? ( x ) Moved? ( ) Unknown? ( ) 1 18.Related features: As noted in item 7b.

SIGNIFICANCE

19.Brlefly state historical and/or architectural importance(include dates, events, and persons associated with the site):

An aerial photo from 1930 shows this reservior newly built with the land around it scarred by the construction.

Subsequent photos show vegetation returning. The reservoir and corrugated metal pumping plant belongs to the San Antonio Water Company; it still supplies irrigation water to the few remaining citrus groves in the immediate ' vicinity. This is one of many such facilities built throughout the local area. It does not appear to have made significant individual contributions to local history and development, and does not appear to meet the eligibility 1 criteria of the National Register.

I
Location sketch map {draw&label
site and surrounding streets, roads,
and prominent landmarks} See Map 3.

20.Main theme of the historic resource: (If more than one is checked, number in order of importance.)
r Architecture ( ) Arts & Leisure ( )
Economic/Industrial ( ) Exploration/Settlement ( ) Government ( ) Military ( ) Religion ( )
■ Social/Education ( )

21.Sources (List books, documents, surveys, personal
interviews and their dates.)
Fairchild Aerial Photo Collection,Whittier College(Photos C829-19/20, 1930; 4061-39, 1936, 05042-25/6, 1938; 13990 3-54, 1949); San Bernardino County Assessor, Map 1044

22.Date form prepared: December 14, 1988
By: Bonnie Parks. Aaron Gallup
Organization: Caltrans
' Address: 1120 N Street
City: Sacramento Zip Code: 95814
Phone: (916) 920-7680
I

Page 776 of 1374 ends

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4.•1`01'.81 ,� ROUTE •30 SCALE ROUTE 30 FREEWAY ALTERNATIVE 1, ALTERNATIVE AN aL`t I� 1161117. �° p' r. CTTY OF io OF 27 .r «... ... -w -•r — .i:kvsr, ENVIRONMENTAL ASSESSMENT MENT ti7RT w v w — UPLAND
'Pa,- n�ai4( a. .S&P-60s5 --

Page 777 of 1374 ends

CULTURAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS PROJECT L C A SEPTEMBER 2024 UPLAND,CALIFORNIA J`(`

APPENDIX B

RECORDS SEARCH RESULTS
P:\20241723_San Antonio Driveway Expansion\PRODUCTS\Technical Studies\Cultural Resources\Draft Report\San Antonio Driveway CRA-CEQA.docx(09/19/24)

Page 778 of 1374 ends

Report List
LSA2412
Report No. Other IDs Year Author(s) Title Affiliation Resources SB-01595 NADB-R-1061595; 1986 BISSELL, RONALD M. CULTURAL RESOURCES ASSESSMENT Voided-86-10.3 OF PROPOSED CONSTRUCTION OF
CAMPUS AVENUE BETWEEN 19TH
STREET AND 22ND STREET,CITY OF

UPLAND,SAN BERNARDINO COUNTY,

CALIFORNIA
SB-01601 NADB-R-1061601; 1986 HATHEWAY, ROGER G. HISTORIC PROPERTY SURVEY REPORT: SCIENTIFIC RESOURCE Voided-86-11.5 and ROGER D. MASON EUCLID AVENUE IMPROVEMENT SURVEYS

PROJECT,CITY OF UPLAND,CALIFORNIA,
PROJECT 3645
SB-01660 NADB-R-1061660; 1987 GROSS, LORRAINE S., CULTURAL AND PALEONTOLOGICAL SCIENTIFIC RESOURCE Voided-87-3.14 KEVIN J. PETER,and RESOURCE INVESTIGATIONS OF THE SURVEYS WILLIAM B. GILMOUR LAKES AT SAN ANTONIO PROJECT,CITY

OF UPLAND,SAN BERNARDINO COUNTY,

CALIFORNIA
SB-02530 NADB-R-1062530; 1989 GALLUP,AARON A., HISTORICAL ARCHITECTURAL SURVEY HARVEY SAWYER 36-016474 Voided-89-3.12 BONNIE W. PARKS, REPORT AND HISTORIC RESOURCE

DENISE O'CONNOR, EVALUATION REPORT FOR A PROPOSED
and STEPHEN D. HIGHWAY ON NEW ALIGNMENT

MIKESELL
SB-03568 NADB-R-1063568 1979 KING,L.D. EUCLID AVE.TRAFFIC IMPROVEMENT 36-002910,36-018222,36-018593, PROJECT M-5083 INFORMATIONAL 36-018594,36-018596,36-018598, REPORT ON EFFECTS SEC 106-HISTORIC 36-018600,36-018602, 36-018603, PRESERVATION ACT.75PP 36-018604
SB-03781 NADB-R-1063781 2000 DUKE, CURT CULTURAL RESOURCE ASSESSMENT LSA 36-006255

FOR AT&T WIRELESS SERVICES
FACILITY C960.1,COUNTY OF SAN
BERNARDINO, CA.4PP
SB-03782 NADB-R-1063782 2002 DUKE, CURT CULTURAL RESOURCE ASSESSMENT: LSA 36-006255

AT&T WIRELESS SERVICES FACILITY
C960A, SAN BERNARDINO COUNTY,CA.
7PP
SB-05800 NADB-R-1065800 2007 Bonner,Wayne H.and Cultural Resource Record Search and Site Marnie Aislin-Kay Visit for Royal Street Communications, LLC Candidate LA22154A(SCE Campus&20th)
Southwest Corner of the Intersection at
Campus Street and 24th Street, Upland,San
Bernardino County,California.

SB-05801 NADB-R-1065801 2007 Eddy,John J.and Daniel Historical/Archaeological Resources Survey Ballester Report:Proposed Zone III Reservoir,City of Upland,San Bernardino County,California.

Page 1 of 2 ends

Page 779 of 1374 ends

Report List
LSA2412
Report No. Other IDs Year Author(s) Title Affiliation Resources SB-06624 NADB-R-1066624 2009 Wlodarski, Robert J. Record Search and Field Reconnaissance Phase for the Proposed AT&T Wireless
Communications Site LAC960(Euclid
Highway 30)located at 1933 Campus Drive,
Upland,California.

SB-07873 NADB-R-1067873 2014 Wills,Carrie D.and Cultural Resource Records Search and Site First Carbon Soluitions Kathleen A.Crawford Visit Results for Verizon Wireless Candidate 'Winston', East 20th Street, Upland,San
Bernardino County,California.

Page 2 of 2 ends

Page 780 of 1374 ends

CULTURAL RESOURCES ASSESSMENT SAN ANTONIO WATER COMPANY HEADQUARTERS PROJECT L C A SEPTEMBER 2024 UPLAND,CALIFORNIA J`(`

APPENDIX C

NATIVE AMERICAN CONSULTATION ASSISTANCE
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u 'T — '' STATE OF CALIFORNIA Gavin Newsom, Governor ' ! k NATIVE AMERICAN HERITAGE COMMISSION
f, `°' July 8,2024
Jaimi Starr
CHAIRPERSON LSA Associates, Inc.

Reginald Pagaling
Chumash Via Email to:[email protected]

VICE-CHAIRPERSON
BufFy McQuillan Re:San Antonio Water Co. Headquarters& Driveway(20241723)Project, San Bernardino County Yokayo Porno, Yuki,
Nomiaki
To Whom It May Concern:

SECRETARY �Sara Dutschke A record search of the Native American Heritage Commission (NAHC) Sacred Lands File (SLF) Miwok was completed for the information submitted for the above referenced project.The results were positive. Please contact the Gabrieleno Band of Mission Indians- Kizh Nation on the attached list for information. Please note that tribes do not always record their sacred sites in PARLIAMENTARIAN the SLF, nor are they required to do so. A SLF search is not a substitute for consultation with tribes Wayne Nelson that are traditionally and culturally affiliated with a project's geographic area. Other sources of EuiSena
cultural resources should also be contacted for information regarding known and recorded sites,such as the appropriate regional California Historical Research Information System (CHRIS) COMMISSIONER archaeological Information Center for the presence of recorded archaeological sites.

Isaac Bojorquez
ohione-Costanoan Attached is a list of Native American tribes who may also have knowledge of cultural resources in the project area.This list should provide a starting place in locating areas of potential COMMISSIONER adverse impact within the proposed project area. Please contact all of those listed; if they Stanley Rodriguez cannot supply information, they may recommend others with specific knowledge. By Kumeyaoy contacting all those listed,your organization will be better able to respond to claims of failure to consult with the appropriate tribe. If a response has not been received within two weeks of COMMISSIONER notification,the Commission requests that you follow-up with a telephone call or email to Laurena Bolden ensure that the project information has been received.

Serrano
If you receive notification of change of addresses and phone numbers from tribes, please notify COMMISSIONER the NAHC. With your assistance, we can assure that our lists contain current information.

Reid Milanovich
CahuiNa If you have any questions or need additional information, please contact me at my email address:[email protected]

COMMISSIONER
Bennae Calac Sincerely,
Pauma-Yuima Band of
Luiseno Indians
Warty_ Z76Wee.

EXECUTIVE SECRETARY
Raymond C. Murphy Donahue
Hitchcock Cultural Resources Analyst
Miwok,Nisenan
NAHC HEADQUARTERS Attachment
1550 Harbor Boulevard
Suite 100
West Sacramento,
California 95691
(916)373-3710
[email protected]
NAHC.ca.gov

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Native American Heritage Commission
Native American Contact List
San Bernardino County
7/8/2024
County Tribe Name Fed(F) Contact Person Contact Address Phone# Fax# Email Address Cultural Affiliation Counties Last Updated Non-Fed(NI
San Bernardino Agua Caliente Band of Cahuilla Indians F Lacy Padilla,Director of Historic 5401 Dinah Shore Drive (760)333-5222 (760)699-6919 [email protected] Imperial,Riverside,San Bernardino,San Diego 1/11/2024 Preservation/THPO Palm Springs,CA,92264
Cahuilla Band of Indians F Erica Schenk,Chairperson 52701 CA Highway 371 (951)590-0942 (951)763-2808 [email protected] Cahuilla Imperial,Los Angeles,Orange,Riverside,San 2/1/2024 Anza,CA,92539 Bernardino,San Diego
Cahuilla Band of Indians F Anthony Madrigal,Tribal Hlstorlc52701 CA Highway 371 (951)763-5549 [email protected] Cahuilla Imperial,Los Angeles,Orange,Riverside,San 6/28/2023 Preservation Officer Anza,CA,92539 Bernardino,San Diego Cahuilla Band of Indians F BobbyRay Esparza,Cultural 52701 CA Highway 371 (951)763-5549 [email protected] Cahuilla Imperial,Los Angeles,Orange,Riverside,San 6/28/2023 Director Anza,CA,92539 Bernardino,San Diego
Gabrieleno Band of Mission Indians- N Andrew Sales,Chairperson P.O.Box 393 (844)390-0787 [email protected] Gabrieleno Los Angeles,Orange,Riverside,San 8/18/2023 Klzh Nation Covina,CA,91723 Bernardino,Santa Barbara,Ventura Gabrieleno Band of Mission Indians- N Christina Swindell Martinez, P.O.Box 393 (844)390-0787 [email protected] Gebrieleno Los Angeles,Orange,Riverside,San 8/18/2023 Klzh Nation Secretary Covina,CA,91723 Bernardino,Santa Barbara,Ventura Gabrieleno/Tongva San Gabriel Band of N Anthony Morales,Chairperson P.O.Box 693 (626)483-3564 (626)286-1262 [email protected] Gebrieleno Los Angeles,Orange,Riverside,San 12/4/2023 Mission Indians San Gabriel,CA,91778 Bernardino,Santa Barbara,Ventura Gabrielino Tongva Indians of Callfomla N Robert Dorame,Chairperson P.O.Box 490 (562)761-6417 (562)761-6417 [email protected] Gabriellno Los Angeles,Orange,Riverside,San 3/16/2023 Tribal Council Bellflower,CA,90707 Bernardino,Santa Barbara,Ventura Gabriellno Tongva Indians of California N Christina Conley,Cultural P.O.Box 941078 (626)407-8761 [email protected] Los Angeles,Orange,Riverside,San 3/16/2023 Tribal Council Resource Administrator Simi Valley,CA,93094 du Bernardino,Santa Barbara,Ventura Gabrielino/Tongva Nation N Sandonne Goad,Chairperson 1061/2 Judge John Also St, (951)807-0479 [email protected] Gabriellno Los Angeles,Orange,Riverside,San 3/28/2023 #231 Bernardino,Santa Barbara,Ventura
Los Angeles,CA,90012
Gabriellno-Tongva Tribe N Sam Dunlap,Cultural Resource P.O.Box 3919 (909)262-9351 tongvatcr@gmallcom Gabriellno Los Angeles,Orange,Riverside,San 5/30/2023 Director Seal Beach,CA,90740 Bernardino,Santa Barbara,Ventura Gabriellno-Tongva Tribe N Charles Alvarez,Chairperson 23454 Vanowen Street (310)403-6048 [email protected] Gabriellno Los Angeles,Orange,Riverside,San 5/30/2023 West Hills,CA,91307 Bernardino,Santa Barbara,Ventura Morongo Band of Mission Indians F Ann Briefly,THPO 12700 Pumana Road (951)7555259 (951)572-6004 [email protected] Cahuilla Imperial,Kem,Los Angeles,Riverside,San Banning,CA,92220 Serrano Bernardino,San Diego
Morongo Band of Mission Indians F Robert Martin,Chairperson 12700 Pumarra Road (951)7555110 (951)7555177 [email protected] Cahuilla Imperial,Kem,Los Angeles,Riverside,San Banning,CA,92220 Serrano Bernardino,San Diego
Ouechan Tribe of the Fort Yuma F Manfred Scott,Acting Chairman P.O.Box 1899 (928)210-8739 culturalcommittee@quechanbibe0uechan Imperial,Kem,Los Angeles,Riverside,San 5/16/2023 Reservation Kwts'an Cultural Committee Yuma,AZ,85366 .corn Bernardino,San Diego Ouechan Tribe of the Fort Yuma F Jill McCormick,Historic P.O.Box 1899 (928)261-0254 historicpreservation@quechantri Ouechan Imperial,Kem,Los Angeles,Riverside,San 5/16/2023 Reservation Preservation Officer Yuma,AZ,85366 be.com Bernardino,San Diego Ouechan Tribe of the Fort Yuma F Jordan Joaquin,President, P.O.Box 1899 (760)919-3600 executivesecretary@quechantribQuechan Imperial,Kern,Los Angeles,Riverside,San 5/16/2023 Reservation Ouechan Tribal Council Yuma,AZ,85366 P.com Bernardino,San Diego San Manuel Band of Mission Indians F Alexandre McCleary,Senior 26569 Community Center Drive(909)633-0054 alexandra.mccleary@sanmanuelSerrano Kern,Los Angeles,Riverslde,San Bernardino 1/16/2024 Manager of Cultural Resources Highland,CA,92346 nsn.gov Mananemen
Santa Rosa Band of Cahuilla Indians F Vanessa Mott,Tribal P.O.Box 391820 (951)659-2700 (951)659-2228 [email protected] Cahuilla Imperial,Los Angeles,Orange,Riverside,San 4/8/2024 Administrator Anza,CA,92539 Bernardino,San Diego Santa Rosa Band of Cahuilla Indians F Steven Estrada,Tribal ChairmanP.O.Box 391820 (951)659-2700 (951)659-2228 [email protected] Cahuilla Imperial,Los Angeles,Orange,Riverside,San 4/8/2024 Anza,CA,92539 Bernardino,San Diego
Serrano Nation of Mission Indians N Wayne Walker,Co-Chairperson P.O.Box 343 (253)370-0167 [email protected] Serrano Kern,Los Angeles,Riverside,San Bernardino 10/10/2023 Patton,CA,92369
Serrano Nation of Mission Indians N Mark Cochrane,Co-ChalrpersonP.O.Box 343 (909)578-2598 [email protected] Serrano Kern,Los Angeles,Riverslde,San Bernardino 10/10/2023 Patton,CA,92369
Soboba Band of Lulseno Indians F Jessica Valdez,Cultural P.O.Box 487 (951)663-6261 (951)654-4198 [email protected] Cahuilla Imperial,Los Angeles,Orange,Riverside,San 7/14/2023 Resource Specialist San Jacinto,CA,92581 Lulseno Bernardino,San Diego Soboba Band of Lulseno Indians F Isaiah Vivanco,Chairperson P.O.Box 487 (951)654-5544 (951)654-4198 [email protected] Cahuilla Imperial,Los Angeles,Orange,Riverside,San 7/14/2023 San Jacinto,CA,92581 Lulseno Bernardino,San Diego Soboba Band of Lulseno Indians F Joseph Ontiveros,Tribal HlstorioP.O.Box 487 (951)663-5279 (951)654-4198 [email protected] Cahuilla Imperial,Los Angeles,Orange,Riverside,San 7/14/2023 Preservation Officer San Jacinto,CA,92581 Lulseno Bernardino,San Diego This list is current only as of the date of this document.Distribution of this list does not relieve any person of statutory responsibility as defined in Section 7050.5 of the Health and Safety Code,Section 5097.94 of the Public Resource Section 5097.98 of the Public Resources Code. ecord:ram-zoza-ooasva Report Tyre n of mel
counel maramo
This list is only applicable for contacting local Native Americans with regard to cultural resources assessment for the proposed San Antonio Water Co.Headquarters 8 Driveway(20241723)Protect,San Bernardino County. rvnrvc Group:All 07/08/272112,0PM Page 783 of 1374

City of Upland
AB52 Tribal Consultation Notification
Gabrieleno Band of Mission Indians - Kizh Nation
Andrew Salas, Chairperson
P.O. Box 393
Covina, California 91723
[email protected]
Gabrieleno/Tongva San Gabriel Band of Mission Indians
Anthony Morales, Chairperson
P.O. Box 693
San Gabriel, California 91778
[email protected]
Yuhaaviatam of San Manuel Nation
Alexandra McCleary, Cultural Lands Manager
26569 Community Center
Highland, California 92346
[email protected]
Torres Martinez Desert Cahuilla Indians
Michael Mirelez, Cultural Resources Coordinator
Abraham Becerra, Cultural Coordinator
P.O. Box 1160
Thermal, CA 92274
[email protected]

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INITIAL STIIOYIMITISATED NEGATIVE DECLARATION SAN ANTONI❑WATER COMPANY HEADQUARTERS PROTECT ` s A AUGUST 2025 UPLAND,CALIFORNIA rL.

APPENDIX D

REPORT OF GEOTECHNICAL EVALUATIONS
P:\2O24\2O241723San Antonia Driveway Expansion\PRODUCTS\CEQA\Public Review❑raft\5an Antonio Water Headquarters ISMND_08.08.25.dacx(08/08/25)

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SOILS SOUTHWEST, INC.
tit)II'\ 11\II Rl115 1NI) I NlIF.()\111 N111 I1r,INI I I:I!tt,(()NM 1 I1\Iti 897 VIA LATA, SUITE N• COLTON,CA 92324 •(909)370-0474 • (909) 370-0481 •FAX (909) 370•3156 l erjt j1 of Get:technical evaluation`anti
Sails 1nliltratian Testing far WI M17-II3M1F Starinwater t isnnsal Design Planned New San Antonio Water District Headquarters Office and Maintenance Facility 400 E. 20th Street
Upland, CA
APN: 1044-091-22
Project No. 24036-F/BMP
August 28, 2024
Prepared for:

CEDG, Inc.
do Mr. Erik Peterson
401 E. Columbia Avenue
Pomona, CA 91767
soil ssouthwestpa ol.com
Established 1984 Page 788 of 1374

SOILS SOUTHWEST, INC.
111I I RI\I ti \NI)I N\Ik(1N 111\11I I NUM I kING COW it 11N I ti 897 VIA LATA, SUITE N -COLTON,CA 92324 -(909)370-0474 •(909) 370.0481 •FAX(909)370-3156 August 28, 2024 Project No.24001-F/BMP
CEDG, Inc.
401 E. Columbia Avenue
Pomona, CA 91767
Attention: Mr. Erik Peterson
Subject: Report of Geotechnical Evaluations and
Soils Infiltration Rates for WQMP-BMP Stormwater Disposal Design Planned New San Antonio Water District Headquarters Office and Maintenance Facility 400 E_ 20th Street
Upland, CA
APN: 1044-091-22
Reference: Preliminary Site Plan Provided by Addressee Dear Mr. Peterson,
Presented herewith is the report of(i) Geotechnical Evaluations and (ii) Soils Infiltration Rates for WQMP- BMP Stormwater Disposal Design proposed for the planned new administrative office and maintenance structures, parking, along with shallow depth basin and underground infiltration disposal systems to be located 400 East 20th Street, Upland, California. in absence of detailed development plans review, the opinions and recommendations included should be considered as"preliminary". Revised and/or updated recommendations may be warranted following precise grading and development plans review.

Based on the referenced site plan, it is understood that the subject development will primarily include two new near grade structures including one maintenance shop and one administrative office structure.

Construction of wood and stucco, concrete tilt-up or concrete framed, or concrete block construction with concrete slabs-on-grade is assumed. Supplemental construction is to include on-site driveways and parking and paving for auto/heavy-duty truck traffic , along with the installation of a couple WQMP-BMP stormwater disposal systems to complete the project. Moderate site preparations and grading should be expected. For estimation purposes, the anticipated structural loadings of 80 kips and 8 klf are assumed for isolated column and conventional wall spread foundations, respectively.

Based on the test explorations and laboratory testing completed at this time, it is our opinion that the soils encountered primarily consist of upper 3 feet of variegating layers of gravels and silty fine to medium coarse gravel sand mixtures with high concentrations of rocks, cobbles, and occasional small boulders to the refusal depth of 3 feet explored. Descriptions of the soils encountered are provided in the attached Log of Borings.

Na shallow-depth groundwater or impermeable layers were encountered. Historical and shallow-depth groundwater is reported at approximately 267 feet below grade as measured at the nearest water well, 01 N07W28N002S. Based on such, and as described in the Special Publication SP117, published by the State of California Department of Conservation, Division of Mines and Geology, it is our opinion that the site is considered non-susceptible to seismically induced soils liquefaction thereby requiring no special geotechnical design recommendations other than those as recommended herein. [email protected]
Established 1984 Page 789 of 1374

San Antonio Water District Headquarters/400 E.20"'Street.Upland,CA. 24036-FfOMP Based on review of the available USGS (California Geologic Survey) publication, it is understood that the site is not situated within an A-P Special Studies Zone where a known seismic fault passes through the site or its adjacent. Supplemental information is provided in Appendix C.

Following review of the online FEMA National Flood Hazard Layer Mapping, it is understood that the project site is classified as a Zone X, Area of Minimal Flood Hazard.

Based on the evaluations completed at this time, it is our opinion that from a geotechnical viewpoint, the site should be considered suitable for the proposed development provided that the recommendations and opinions included are considered in design and construction.

Final grading and detailed development plan review is suggested to verify the applicability of the certain assumptions as used in preparing this report.

This report has been substantiated by subsurface explorations and mathematical analysis made in accordance with the generally accepted engineering principles, including those field and laboratory testing considered necessary in the circumstances.

We offer no other warranty, expressed or implied.

Respectfully submitted,
Soils Southwest, Inc.
eSSION
Malay Gupta, RCE 3 708 C
QP �� John Flippin
y�` K'GU,o Project Coordinator

4. w31708a12-31-24
` CIO- q,
9�FOF CA�-�F�
SSW August 28,2024 pn.

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San Antonio Water District Headquarters/400 E.20'F'Street, Lipiand,CA- 24036-F/BMP

1.0 Introduction

1.1 Purpose and Scope of Work
This report presents the results of(I) Geotechnical Evaluations and (ii)Soils Infiltration Testing for WQMP-BMP Stormwater Disposal System Design for the new administrative office and maintenance structures, parking, along with shallow depth and underground infiltration design systems to be located 400 East 20th Street, Upland, California- In absence of precise grading and/or detailed development plans, the recommendations and opinions included may require updating and revisions recommendations following detailed development plans review.

Thesoils encountered as described herein are based on visual observations made during test explorations, supplemented by the necessary laboratory testing completed at this time. Being beyond scope of work, no geologic investigations or Phase I Environmental Site Assessment(ESA)are included. Reports of such will be supplied upon request.

The recommendations contained reflect our best estimate of the soils' conditions as encountered during field explorations as conducted for the site. It is not to be considered as a warranty of the soils' conditions for other areas or for the depth beyond the explorations advanced at this time.

The recommendations supplied should be considered valid and applicable following review of the final grading and development plans when supplied and when the following conditions are observed:

Pre-grade meeting with the contractor, public agency, and the geotechnical engineer, ii. Excavated bottom inspections and verifications by the geotechnical engineer prior to backfill placement,
iii. Continuous observations and testing during site preparation and structural fill soils placement, iv- Observation and inspection of footing trenching prior to steel and concrete placement, v. Plumbing trenches backfill placement prior to concrete slab-on-grade placement, vi. On and off-site utility trenches backfill testing and verifications, and vii. Consultations as required during construction or upon your request.

1.2 Site Description
The rectangular shaped subject parcel of 4.92 acres is currently a water district yard facility in operation .

In general, the site is bounded by East 20'h Street to the north, by Interstate 210 Freeway on the south, by vacant undeveloped property on the east, and by Flower Court on the west. Following review of the available site drawings, overall vertical relief within the property is unknown, however, based on site reconnaissance, sheet flow from incidental rainfall is estimated to flow towards the south and southwest.

Other than an existing reservoir tank, pump station, and numerous soil, rock, and asphalt debris stockpiles in the center portion of the property, along with a satellite tower at the southeast corner, presence of no other significant features were noted.

1.3 Proposed Development
No precise grading and/or detailed development plans are available for review; however, it is understood that the subject development will primarily include two (2) structures near existing grade to accommodate, among others, a maintenance building and an administrative office- Use of wood and stucco framed, concrete block, or metal framed construction with concrete slabs-on-grade is assumed. Supplemental construction is anticipated to include on-site driveways, parking and paving, along with the installation of two (2) WQMP-BMP stormwater disposal systems. Considering existing offsite paving, curb-gutter, and drive approaches, off-site street improvements is not anticipated at this time.

Moderatesite preparations and grading are anticipated as described in the following sections- ssw .: s

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San Antonio Water District I-feadquarters/404 E.26"'Street, Upland,CA. 24036-FIBI1/MP

1.4 Subsurface Investigation
The geotechnical evaluations include subsurface explorations, soil sampling, necessary laboratory testing, engineering analyses, and preparation of this report. Being beyond scope of work, no geologic investigations or Phase I Environmental Site Assessments are included. Reports on such will be supplied on request.

In general, our scope of work included the following: review of the referenced site plan supplied along with three (6) test borings (B-1 to B-a) explored by using a Hollow-Stem Auger(HSA) drill rig advanced to the refusal depth of 3 feet below grade along with four(4) infiltration test borings to maximum depths between 3 and 8 feet(P-1 and P-4)as requested for WQMP-BMP Stormwater Disposal Design. During explorations, the soils encountered were continuously logged, bulked, and undisturbed samples were procured and recorded. Collected samples were subsequently transferred to our laboratory for necessary geotechnical testing.

Descriptions of the soils encountered are provided on the attached Log of Borings. Approximate test locations are shown on the attached Plate A.
o Laboratory testing conducted on the selected bulk and undisturbed samples were programmed according to the project requirements. The laboratory testing included determinations of • Moisture Density Determination (ASTM D2216),
• Maximum Dry Density and Optimum Moisture Content(ASTM D1557), • Soils' Peak and Residual Shear Strengths (ASTM D3080), • Soils' Consolidation Characteristics(ASTM D2435),
• Soils' Sieve Analyses(ASTM D422),
• Soils' R-value(ASTM D2844), and
• Soils' Sand Equivalent, SE (ASTM D2419),
o Based on the field investigation and laboratory testing completed the necessary engineering analyses and evaluations were made on which to base our preliminary recommendations for foundation design, slab-on-grade, site preparations and grading, utility trenches backfill, and o Preparation of this report for initial use by the project design professionals.

The recommendations supplied should be considered "tentative" and may require revisions and/or upgrading following final grading and detailed development plans review.

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San Antonio Water District Headquarters/400 E.20`"'Street, Upland,CA. 24036-FIBIVIP

2.0 Geotechnical Evaluations

2.1 Site Soils Description
The soils encountered primarily consist of upper 3 feet of variegating layers of gravels and silty fine to medium coarse gravel sand mixtures with high concentrations of rocks, cobbles, and occasional small boulders to the refusal depth of 3 feet explored. Descriptions of the soils encountered are provided in the attached Log of Borings.

Based on review of the USDA Natural Resources Conservation Service: Web Soil Survey for the subject area, it is our understanding that the soil classification within the structural pad areas is identified as being SpC-Soboba stony loamy sand, 2 to 9 percent slopes with the upper 60 inches consisting of stony loamy stand and very stony sands below existing grade, whereas the soils within the planned underground infiltration disposal system at the southwest portion of the property being classified as HaC-Hanford coarse sandy loam, 2 to 9 percent slopes consisting of sandy loam and fine sandy loam up to five (5) feet below existing grade. Following review of the Geological Map of the Mount Baldy Quadrangle(2002), the project site is designated as consisting of Qg alluvial gravel and sand of stream channels.

Based on review of the available USGS(California Geologic Survey) publications, it is understood that the site is not situated within an A-P Special Studies Zone where seismic fault passes through the site or its adjacent.

No groundwater or impermeable soils were encountered within the refusal depth of 3 feet explored.

According to California Department of Water Resources, the historical groundwater level is at a depth of approximately 267 feet which is in excess of 50 feet below grade as measured at the nearest water well (01N07W28N0025) . Based on such and as described in the Special Publication SP117, published by the State of California Department of Conservation, Division of Mines and Geology, it is our opinion that the site is considered non-susceptible to seismically induced soils liquefaction.

Laboratory shear tests conducted on the upper soils remolded to 90% indicate"moderate"shear strengths under increased moisture conditions. Results of the laboratory shear tests are provided on Plate B.

Consolidation tests conducted on remolded samples indicate"slight" potential for compressibility along with slight to moderate hydro-collapse potential under anticipated static structural loadings with potential for "tolerable"settlements to footings and concrete slabs-on-grade. Areas of slight to moderate compressibility and/or hydro collapsible potential may require further excavation and/or compaction effort. Results of the laboratory determined soils consolidation potential are shown in Appendix B.

Fine to medium coarse to coarse sands with traces of silts along with rocks and cobbles encountered are considered "low" in expansion potential requiring no special construction requirements other than those as recommended herein. Supplemental soil expansion testing, however, is recommended following mass grading completion to provide supplemental/revised foundation recommendations, if warranted,

2.2 Subsurface Variations
During site preparations and grading, buried irrigation, debris, organic and others may be encountered. In addition, variations in soil strata, their continuity and orientations may be expected. Due to the deposition characteristics of the soils encountered, care should be exercised in interpolating or extrapolating the subsurface soils conditions existing in between and beyond the test explorations conducted.

2.3 Excavatibility
It is our opinion that the grading required for the project may be accomplished by using conventional heavy- duty construction equipment. No blasting or jackhammering should be warranted. However, considering the presence of high concentration of cobbles and boulders, it is suggested to use rocks no greater than 6- 8 inches in compacted fills, but directly beneath footings and slabs should be avoided.

AurJusi 1B,2(1a,/ I..i. ,.

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San Antonio Water District Headquarters(400 E.2Q'"Street, Upiand,CA. 24036-F/BMP

1. Chloride concentration equal to 29 mg/Kg does not exceed 10,000 ppm is non-corrosive to ferrous metals,

2. pH equal to 7.93 units exceeding 4.0 units is non-corrosive to buried metals,

3. Sulfate concentration equal to 82 mg/Kg does not exceed 2000 ppm is non-corrosive to concrete, and

4. Resistivity equal to 3,640 ohms/cm is`moderately"corrosive to buried metals.

Soil chemical test results are included in Appendix B.

It is suggested that following mass grading completions. soils corrosivity potential evaluations should be made to determine, at a minimum, concentrations of pH, sulfate, chloride, and resistivity. Further corrective recommendations should be provided by Corrosion Engineer.

2.5 Groundwater
No groundwater or bedrock was encountered within the refusal depth of 3 feet explored. However,following review of the available recorded groundwater well data as shown in the table below, historical groundwater was measured at approximately 267 feet below the existing well grade. The following table describes the historical and the current groundwater level as recorded in the nearest well as listed by the local reporting agency.

GROUNDWATER TABLE
Reporting Agency California Department of Water Resources Marcelo Montagna 2008 Maps
httq://wd I.water.ca.qov/waterdata li b rary/
Well Number 01 N107W 28N002S Cucamonga-1000547 Well Monitoring Agency Chino Basin
Well Location: Township/Range/Section T01 N-RO7W-Section 28 Well Elevation: 1.675
Current Depth to Water(Measured in feet) 469
Current Date Water was Measured March 26,2024
Depth to Water (Measured in feet) 267
(Shallowest)
Date Water was Measured (Shallowest) December 16,1983 Fluctuations in groundwater levels, however, can occur due to seasonal variations in the amount of rainfall, runoff, altered natural drainage paths, and other factors not evident at the time the test borings completed.

Accordingly, for the planned development, it is our opinion that provisions should be maintained to dispose incidental surface runoff away from the individual structural pads, once constructed. • ,

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San Antonio Water District Headquarters/400 E.20'h Street, Upland,CA. 24036-FIBMP

3.0 Faulting and Seismicity

3.1 Faulting and Seismicity
Based on the information published by the USGS (currently known as California Geologic Survey) Department of Conservation, State of California, it is understood that the site is not situated within an A-P Special Study Zone where earthquake fault(s) runs through or adjacent to the subject site. In the absence of shallow(less than 50 feet)depth groundwater,the site is considered non-susceptible to soils liquefaction in the event of a strong motion earthquake. However, the site being within Southern California where potentials for seismically induced structural hazards could not be ignored, it is our opinion that implementation of the current CBC seismic design parameters in structural design as described herein may reduce the potential for seismically induced structural distress to some"acceptable"tolerable limits.

Seismically induced site-specific potential hazards are discussed in the following sections_

3.2 Direct or Primary Seismic Hazards
Surface ground rupture along with active fault zones and ground shaking represent primary or direct seismic hazards to structures. There are no known active or potentially active faults that pass through or towards the subject site and the site is not situated within an A-P Special Studies Zone. According to the current 2022 CBC, the site is considered situated within Seismic Zone 4- As a result, it is likely that during the life expectancy of the structures built, moderate to severe ground shaking may have some adverse effects to the structures built.

3.3 Induced or Secondary Seismic Hazards
In addition to ground shaking, effects of seismic activity may include surface rupture, flooding, Iandsliding, lateral spreading, settlements, and subsidence. Potential effects of such are as described below.

3.3.1 Liquefaction
Liquefaction is caused by build-up of excess hydrostatic pressure in saturated cohesionless soils due to cyclic stress generated by ground shaking during an earthquake. The significant factors on which liquefaction potential of a soil deposit depends, among others include, soil type, relative soil density, intensity of earthquake, duration of ground shaking, and depth of ground water.

No groundwater was encountered within the refusal depth of 3 feet explored. In absence of historically reported groundwater within 50 feet below grade, and based on review the Special Publication SP117, published by the State of California Department of Conservation, Division of Mines and Geology, it is our opinion that the site is considered non-susceptible to seismically induced soils liquefaction thereby requiring no special geotechnical design recommendations other than those as recommended herein-

3.3.2 Shallow Depth Ground Rupture
The site is not situated within an A-P Special Studies Zone. Based on review of the existing geologic information, no major fault is noted to cross through or extend towards the site- The potential for surface rupture resulting from nearby fault movement is not known for certainty; however, in our opinion it is considered"remote"due to the distance of the site to the recorded nearby earthquake fault

3.3.3 Flooding
Flooding hazards include tsunamis (seismic sea waves), Seiches, or failure of manmade reservoirs, tanks, and aqueducts. The potential for these hazards is considered "remote" considering the inland site location and in absence of nearby known bodies of water. Based on review of the FEMA National Flood Hazard Layer FIRMette map, it is our understanding that the subject area is delineated as Zone X, Area of Minimal Flood Hazard on its eastern half while the western half is delineated as being in an area with "Reduced Flood Risk due to Levee as shown in the attached Appendix C.

August 28,2024 i -

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San Antonio Water District Headquartersl400 E.20"'Street,Upiand,CA. 24036-FIBMP

3.3.4 Landslides
Seismically induced landslides and other slope failures are common occurrences during or soon after an earthquake. Considering the site and its adjacent being relatively flat, it is our opinion that potential for seismically induced landslides should be considered "remote".

3.3.5 Lateral Spreading
Seismically induced lateral spreading involves lateral movement of soils due to ground shaking. Lateral spreading is demonstrated by near vertical cracks with predominantly horizontal movement of the soil mass involved. The topography of the site being near level, it is our opinion that the potential for seismically induced lateral spreading should be considered "remote".

3.3.6 Seismically Induced Settlement
Considering the proximity of the earthquake fault as described, it is our opinion that potential for some total and differential settlements due to ground shaking may be anticipated as described herein.

3.4 Seismic Design Parameters
The design spectrum was developed based on the 2022 CBC. Site Coordinates of 34.135692°N, -117.645040°W were used to establish the seismic parameters presented below.

3.4.1 Seismic Design Coefficients
The site is situated at approximately 1.3 miles from the Cucamonga Fault capable of generating an earthquake magnitude, M of 6.7 and Peak Horizontal Ground Acceleration, PGA of 0.753g at 10% probability of exceedance in 50-year return period_
Forfoundation and structural design use of the following seismic parameters are suggested as based on the current 2022 CBC:

Recommended values are based upon the online review of ASCE 7-22 Hazard Tool coefficient parameters.

The following presents the seismic design parameters evaluated based on the available publications published by California Geological Survey (CGS), 2022 CBC, and ASCE Standard 7-16.

TABLE 3.4.1 Al: Seismic Design Parameters
Seismic Source Type
Based on California Geological Survey-Probabilistic Seismic Hazard Assessment Peak Horizontal Ground Acceleration (PGA) having a 10% probability of exceedance in a 50-year period is described as below:

Seismic Source Type I Appendix C
Nearest Maximum Fault Magnitude M?6.7
Peak Horizontal Ground Acceleration (PGA) 0.753g
In design, vertical acceleration may be assumed to about 1/3 to 213 of the estimated horizontal ground accelerations (PGA)described.

Aug Lis , •I•

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San Antonio Water District Headquarters/400 E.20"'Street, Upland,CA. 24036-F!BMP It should be noted that lateral force requirement in design should be intended to resist total structural collapse due to the described PGA of 4.753g or greater. However, during the lifetime use of the structure built, it is our opinion that some structural damage may be anticipated requiring structural repairs and/or replacement. Use of flexible lifeline connections are suggested.

TABLE 3.4.1 A2: Seismic Design Coefficients
CBC Chapter 16 2022 ASCE 7-16 Standard Recommended Seismic Design Parameters Values
1613A.5.2 Site Class D
1613.5.1 The mapped spectral accelerations at short period Ss 1613.5.1 The mapped spectral accelerations at 1.0-second period S1 1613A5.3(1) Seismic Coefficient, Ss 1.766g
1613A5.3(2) Seismic Coefficient, Si 0.658g 1613A5.3(1) Site Class D 1 Seismic Coefficient, F, 1g 1613A5.3(2) Site Class D 1 Seismic Coefficient, n/a • 16A-37 Equation Spectral Response Accelerations,SMMS=F,Ss 1.766g 16A-38 Equation Spectral Response Accelerations, Snit =FV Sin/a 16A-39 Equation Design Spectral Response Accelerations, Soy=2/3 x Sin; 1.177g 16A-40 Equation Design Spectral Response Accelerations,Sol =2/3 x Sn;z n/a Mi ust 28,2024 141. 1 i

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San Antonio Water District Headquarters/400 E.20'h Street,Upland,CA. 24036-FIOMP

4.0 Evaluations and Recommendations

4.1 General Evaluations
Based on field explorations, laboratory testing, and subsequent engineering analyses, the following tentative conclusions and recommendations are presented for initial study:
(I) From a geotechnical viewpoint, the site is considered grossly stable for the proposed development, provided that the recommendations supplied herein are incorporated in design and construction.

Foundation design should reflect considerations of the seismically induced PGA as described. (II) Based on the dry, silty, gravelly, variable consistency nature of the upper soils existing as encountered, it is our opinion that for structural support the load bearing soils should be reworked in the form of subexcavations, followed by scarification, moisturization, and their replacement as engineered fills compacted to minimum 90%. In the event that new fill soils are required over the current grade surface such should be placed on the original grades when prepared as described. (Ill) The subexcavation depths during mass grading as described in the following section should be considered as "minimum". During grading, localized deeper subexcavations may be required within areas underlain by buried debris, utilities, localized fills or soft soils and others. It will be the responsibility of the grading contractor to inform the project geotechnical engineer of the presence of such prior to further site preparations and grading.
(IV) In order to minimize potential for differential settlements, it is recommended that structural footings should be established exclusively into engineered fills of local soils compacted to the minimum as recommended in this report. Construction of footings and slabs straddling over cut and fill transition conditions shall be avoided.
(V) Structural design consideration should include probability for "moderate" peak ground acceleration from relatively active nearby earthquake faults. Implementing the seismic design parameters and procedures as outlined in the current CBC and as described earlier, however, may minimize the adverse effects for the structures proposed.
(VI) Although no groundwater was encountered, provisions should be maintained during construction to divert incidental rainfall away from the structural pads constructed. (VII) It is our opinion that, if site preparations and grading are performed as recommended and as per the generally accepted construction practices and current CBC, the proposed development will not adversely affect the stability of the site or its adjacent.

4.1.1 Recommendations for Site Preparations and Grading for Structural Support In absence of detailed development plans review, the planned structural pad grades are assumed at/or near the existing grade surface. For adequate structural support, it is our opinion that moderate site preparations and grading should be included in the form of subexcavations of the near grade dry, silty, gravelly, variable consistency soils and their replacement as engineered fills compacted to minimum 90%.

In general, site preparations and grading should include subexcavations of the near surface soils to about:
(i) minimum 5 feet below the current grade surface or
(ii)to the depth as required to expose the underlying moist and dense natural subgrades or (iii) to the depth as required to maintain a 24-inch-thick compacted fill mat blanket below foundation bottoms, whichever is greater.

The site preparations and grading described should encompass, at a minimum, the proposed structural footprint areas and minimum 5 feet beyond or as suggested by the geotechnical engineer during grading. No cut and fill transition conditions should be allowed.
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San Antonio Water District Headquarters/400 E.2011 Street.Upland,CA. 2403E-F/BMP Within areas requiring fill soils, if any, such may be placed following sufficient subexcavations to expose the underlying dense subgrades as approved by the project geotechnical engineer. During grading, the engineered fills placed should be compacted to near Optimum Moisture and with minimum 90% compaction of soils' Maximum Dry Density as determined by ASTM 01557.

The subexcavation depths described should be considered as "preliminary". Localized additional subexcavations may be required within areas underlain by undocumented old fills, buried utilities and abandoned sewer and/or buried septic systems. It is recommended that the excavated subgrades should be verified and approved by the geotechnical engineer prior to structural fill soil placement. Supplemental recommendations may be warranted following detailed development plans review.

Mass grading required for the project is recommended to encompass, at a minimum, the entire individual structural pads and beyond.

For reference, supplemental general mass grading recommendations are included Section 5 of this report.

4.2 Structural Fill Material Requirements
The local and/or imported fills, if required, should be gravelly sand, free of organics, roots, debris, and rocks larger than 6 to 8-inch in diameter.

Although no significant variations in soil conditions are anticipated, actual soils conditions may vary during grading. It will be the contractor's responsibility to notify Soils Southwest, Inc. about such variations for revised/updated geotechnical recommendations.

Non-expansive in nature, the on-site soils free of organic, debris, and rocks larger than 8-inch in load bearing structural backfills placed should be compacted to minimum 90%of the soils' Maximum Dry Density as determined by ASTM D1557 test method. Import soils, if required, should be non-expansive, gravelly sand and meeting the following criteria:

Liquid Limit <35
Plasticity Index <15
Expansion Index <20

4.2.1 Structural Fill Soils Placement
Within the areas of structural loadings, it is our opinion that the near grade soils should be subexcavated to minimum 5 feet depth. For adequate structural bearing, it is our opinion that the excavated soils may be placed in 6 to 8-inch lifts with near Optimum Moisture Conditions compacted to minimum 90°/0. No structural fills should be placed during unfavorable weather conditions.

4.2.2 Cut and Fill Transition Conditions Pad Preparations (if applicable) Use of cut and fill transition conditions should be avoided to minimize potential for differential settlements to footings and concrete slabs-on-grade. Within cut and fill transition areas, if it becomes essential, it is suggested that following the necessary cut, the entire structural pad should be prepared so as to establish a uniform bearing compacted fill mat prepared in conformance to the general guidelines as described below. •.•v j'.i,i Vlt?� . , ,..,, i

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Upland City CouncilJanuary 12, 2026

Upland City Council
January 12, 2026