Exhibit A1_800 Dubuque Avenue_ISMND with Appendices — South San Francisco City Council, July 12, 2023 (part 2 of 2)

800 Dubuque Ave, South San Francisco, CA - Cancer Risks from Project Operation Project Emergency Generators
Impacts at Off-Site Gateway Child Development Center YMCA - 1m MEI Receptor Heights Impact at Project MEI (5-year Exposure)
Cancer Risk (per million) = CPF x Inhalation Dose x ASF x ED/AT x FAH x 1.0E6 Where: CPF = Cancer potency factor (mg/kg-day)-1
ASF = Age sensitivity factor for specified age group
ED = Exposure duration (years)
AT = Averaging time for lifetime cancer risk (years)
FAH = Fraction of time spent at home (unitless)
Inhalation Dose = Cair x DBR x A x (EF/365) x 10-6
Where: Cair = concentration in air (μg/m3)
SAF = Student Adjustment Factor (unitless)
= (24 hrs/9 hrs) x (7 days/5 days) = 3.73
8-Hr BR = Eight-hour breathing rate (L/kg body weight-per 8 hrs) A = Inhalation absorption factor
EF = Exposure frequency (days/year)
10-6 = Conversion factor
Infant/Child Adult
Age --> 3rd Trimester 0 - 2 2 - 16 16 - 30
Parameter
ASF = 10 10 3 1
CPF = 1.10E+00 1.10E+00 1.10E+00 1.10E+00
DBR* = 361 1200 520 240
A = 1 1 1 1
EF = 250 250 250 250
AT = 70 70 70 70
FAH = 1.00 1.00 3.73 1.00
* 95th percentile 8-hr breathing rates for moderate intensity activities Construction Cancer Risk by Year - Maximum Impact Receptor Location Infant/Child - Exposure Information Infant/Child
Exposure Age Cancer
Exposure Duration DPM Conc (ug/m3) Sensitivity Risk Hazard Fugitive Total Year (years) Age Year Annual Factor (per million) Index PM2.5 PM2.5 1 1 0 - 1 2028 0.0012 3 0.08
2 1 1 - 2 2029 0.0012 3 0.08
3 1 2 - 3 2030 0.0012 3 0.08 0.00024 0.0012 0.0024
4 1 3 - 4 2031 0.0012 3 0.08 0.00024 0.0012 0.0024
5 1 4 - 5 2032 0.0012 3 0.08 0.00024 0.0012 0.0024
Total Increased Cancer Risk 0.38 Max 0.00024 0.0012 0.0024

Evaporative Cooling Tower PM Emissions
Total Water Flow Rate (gpm) 750
Cooling Tower Circulating Water TDS (ppm)* 96
Mist Eliminator Efficiency (%) 0.001
Total Cooling Tower Drift (gpm) 0.01
Particulate Matter Emissions
PM PM10 PM2.5
Fraction of PM** 1.00 0.70 0.42
Hourly (lb/hr) 3.60E-04 2.52E-04 1.51E-04
Daily (lb/day) 0.01 0.01 0.00
Annual lb/yr) 3.16 2.21 1.33
Annual (ton/yr) 0.00 0.00 0.00
* Maximum TDS value based on 2021 South San Francisco Water Quality Report ** South Coast AQMD, Final-Methodology to Calculate Particulate Matter (PM) 2.5 and PM2.5 Significance Thresholds, Appendix A. 800 Dubuque Avenue, South San Francisco, CA - Project Cooling Tower - PM2.5 AERMOD Risk Modeling Parameters and Maximum Concentrations - Project Cooling Tower at Gateway Child Development Center YMCA MEI Receptor (1 m receptor height) Emission Year 2028
Receptor Information Childcare MEI receptor
Number of Receptors 1
Receptor Height 1 meter
Receptor Distances At Childcare MEI location
Meteorological Conditions
BAQMD San Francisco International Airp2013-2017
Land Use Classification Urban
Wind Speed Variable
Wind Direction Variable
PM2.5 Maximum Concentrations
Meteorological
Data Years
2013-2017
PM2.5 Concentration (μg/m3)
Preschool MEI

0.00075

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Cumulative Operation - Highway 101
DPM Modeling - Roadway Links, Traffic Volumes, and DPM Emissions Year = 2023
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
DPM_NB_101 Highway 101 Northbound NB 4 758.0 0.47 20.6 67.7 3.4 68 94,760 DPM_SB_101 Highway 101 Southbound SB 4 757.9 0.47 20.6 67.7 3.4 63 94,760 Total 189,520
Emission Factors
Speed Category 1 234
Travel Speed (mph) 70 65 60
Emissions per Vehicle (g/VMT) 0.00054 0.000544 0.000486 Emisson Factors from CT-EMFAC2017
2023 Hourly Traffic Volumes and DPM Emissions - DPM_NB_101 Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.26% 1196 8.51E-05 9 6.16% 5840 4.16E-04 17 6.02% 5704 4.06E-04 2 0.78% 736 5.24E-05 10 5.95% 5641 4.02E-04 18 6.33% 6001 4.27E-04 3 0.60% 571 4.06E-05 11 5.73% 5430 3.86E-04 19 5.61% 5319 3.79E-04 4 0.65% 620 4.41E-05 12 5.85% 5548 3.95E-04 20 4.51% 4269 3.04E-04 5 1.29% 1219 8.67E-05 13 6.07% 5749 4.09E-04 21 3.87% 3669 2.61E-04 6 3.08% 2922 2.08E-04 14 5.84% 5532 3.94E-04 22 3.48% 3297 2.35E-04 7 4.76% 4512 3.21E-04 15 5.96% 5644 4.02E-04 23 2.69% 2552 1.82E-04 8 5.70% 5403 3.85E-04 16 5.98% 5666 4.03E-04 24 1.82% 1722 1.23E-04 Total 94,760
2023 Hourly Traffic Volumes Per Direction and DPM Emissions - DPM_SB_101 Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.12% 1062 7.56E-05 9 5.45% 5167 3.68E-04 17 6.96% 6599 4.20E-04 2 0.69% 653 4.65E-05 10 5.52% 5229 3.32E-04 18 6.86% 6502 4.13E-04 3 0.62% 584 4.15E-05 11 5.57% 5275 3.35E-04 19 5.66% 5367 3.41E-04 4 0.80% 761 5.41E-05 12 5.89% 5580 3.55E-04 20 4.46% 4228 3.01E-04 5 1.49% 1416 1.01E-04 13 5.97% 5656 3.60E-04 21 3.71% 3513 2.50E-04 6 2.76% 2611 1.86E-04 14 6.13% 5807 3.69E-04 22 3.30% 3129 2.23E-04 7 3.87% 3663 2.61E-04 15 6.76% 6404 4.07E-04 23 2.68% 2536 1.80E-04 8 5.11% 4845 3.45E-04 16 6.83% 6474 4.12E-04 24 1.79% 1700 1.21E-04 Total 94,760

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Cumulative Operation - Highway 101
PM2.5 Modeling - Roadway Links, Traffic Volumes, and PM2.5 Emissions Year = 2023
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
PM2.5_NB_101 Highway 101 Northbound NB 4 758.0 0.47 20.6 68 1.3 67.708333 94,760 PM2.5_SB_101 Highway 101 Southbound SB 4 757.9 0.47 20.6 68 1.3 62.916667 94,760 Total 189,520
Emission Factors - PM2.5
Speed Category 1 234
Travel Speed (mph) 70 65 60
Emissions per Vehicle (g/VMT) 0.001734 0.00163 0.001434 Emisson Factors from CT-EMFAC2017
2023 Hourly Traffic Volumes and PM2.5 Emissions - PM2.5_NB_101 Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.26% 1196 2.71E-04 9 6.16% 5840 1.24E-03 17 6.02% 5704 1.22E-03 2 0.78% 736 1.67E-04 10 5.95% 5641 1.20E-03 18 6.33% 6001 1.28E-03 3 0.60% 571 1.29E-04 11 5.73% 5430 1.16E-03 19 5.61% 5319 1.21E-03 4 0.65% 620 1.41E-04 12 5.85% 5548 1.18E-03 20 4.51% 4269 9.69E-04 5 1.29% 1219 2.76E-04 13 6.07% 5749 1.23E-03 21 3.87% 3669 8.32E-04 6 3.08% 2922 6.63E-04 14 5.84% 5532 1.18E-03 22 3.48% 3297 7.48E-04 7 4.76% 4512 1.02E-03 15 5.96% 5644 1.20E-03 23 2.69% 2552 5.79E-04 8 5.70% 5403 1.15E-03 16 5.98% 5666 1.21E-03 24 1.82% 1722 3.91E-04 Total 94,760
2023 Hourly Traffic Volumes Per Direction and PM2.5 Emissions - PM2.5_SB_101 Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.12% 1062 2.26E-04 9 5.45% 5167 1.10E-03 17 6.96% 6599 1.24E-03 2 0.69% 653 1.39E-04 10 5.52% 5229 9.81E-04 18 6.86% 6502 1.22E-03 3 0.62% 584 1.24E-04 11 5.57% 5275 9.90E-04 19 5.66% 5367 1.01E-03 4 0.80% 761 1.62E-04 12 5.89% 5580 1.05E-03 20 4.46% 4228 9.01E-04 5 1.49% 1416 3.02E-04 13 5.97% 5656 1.06E-03 21 3.71% 3513 7.49E-04 6 2.76% 2611 5.56E-04 14 6.13% 5807 1.09E-03 22 3.30% 3129 6.67E-04 7 3.87% 3663 7.81E-04 15 6.76% 6404 1.20E-03 23 2.68% 2536 5.40E-04 8 5.11% 4845 1.03E-03 16 6.83% 6474 1.21E-03 24 1.79% 1700 3.62E-04 Total 94,760

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Cumulative Operation - Highway 101
TOG Exhaust Modeling - Roadway Links, Traffic Volumes, and TOG Exhaust Emissions Year = 2023
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
TEXH_NB_AIR
Highway 101
Northbound NB 4 758.0 0.47 20.6 68 1.3 67.708333 94,760 TEXH_SB_AIR
Highway 101
Southbound SB 4 757.9 0.47 20.6 68 1.3 62.916667 94,760 Total 189,520
Emission Factors - TOG Exhaust
Speed Category 1 234
Travel Speed (mph) 70 65 60
Emissions per Vehicle (g/VMT) 0.03830 0.03537 0.03132
Emisson Factors from CT-EMFAC2017
2023 Hourly Traffic Volumes and TOG Exhaust Emissions - TEXH_NB_AIR Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.26% 1196 5.99E-03 9 6.16% 5840 2.70E-02 17 6.02% 5704 2.64E-02 2 0.78% 736 3.69E-03 10 5.95% 5641 2.61E-02 18 6.33% 6001 2.78E-02 3 0.60% 571 2.86E-03 11 5.73% 5430 2.51E-02 19 5.61% 5319 2.67E-02 4 0.65% 620 3.11E-03 12 5.85% 5548 2.57E-02 20 4.51% 4269 2.14E-02 5 1.29% 1219 6.11E-03 13 6.07% 5749 2.66E-02 21 3.87% 3669 1.84E-02 6 3.08% 2922 1.46E-02 14 5.84% 5532 2.56E-02 22 3.48% 3297 1.65E-02 7 4.76% 4512 2.26E-02 15 5.96% 5644 2.61E-02 23 2.69% 2552 1.28E-02 8 5.70% 5403 2.50E-02 16 5.98% 5666 2.62E-02 24 1.82% 1722 8.63E-03 Total 94,760
2023 Hourly Traffic Volumes Per Direction and TOG Exhaust Emissions - TEXH_SB_AIR Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.26% 1196 5.53E-03 9 6.16% 5840 2.70E-02 17 6.02% 5704 2.34E-02 2 0.78% 736 3.40E-03 10 5.95% 5641 2.31E-02 18 6.33% 6001 2.46E-02 3 0.60% 571 2.64E-03 11 5.73% 5430 2.22E-02 19 5.61% 5319 2.18E-02 4 0.65% 620 2.87E-03 12 5.85% 5548 2.27E-02 20 4.51% 4269 1.98E-02 5 1.29% 1219 5.64E-03 13 6.07% 5749 2.36E-02 21 3.87% 3669 1.70E-02 6 3.08% 2922 1.35E-02 14 5.84% 5532 2.27E-02 22 3.48% 3297 1.53E-02 7 4.76% 4512 2.09E-02 15 5.96% 5644 2.31E-02 23 2.69% 2552 1.18E-02 8 5.70% 5403 2.50E-02 16 5.98% 5666 2.32E-02 24 1.82% 1722 7.97E-03 Total 94,760

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Cumulative Operation - Highway 101
TOG Evaporative Emissions Modeling - Roadway Links, Traffic Volumes, and TOG Evaporative Emissions Year = 2023
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
TEVAP_NB_AIR Highway 101 Northbound NB 4 758.0 0.47 20.6 68 1.3 67.708333 94,760 TEVAP_SB_AIR Highway 101 Southbound SB 4 757.9 0.47 20.6 68 1.3 62.916667 94,760 Total 189,520
Emission Factors - PM2.5 - Evaporative TOG
Speed Category 1 234
Travel Speed (mph) 70 65 60
Emissions per Vehicle per Hour (g/hour) 1.22842 1.22842 1.22842 Emissions per Vehicle per Mile (g/VMT) 0.01755 0.01890 0.02047 Emisson Factors from CT-EMFAC2017
2023 Hourly Traffic Volumes and TOG Evaporative Emissions - TEVAP_NB_AIR Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.26% 1196 2.75E-03 9 6.16% 5840 1.44E-02 17 6.02% 5704 1.41E-02 2 0.78% 736 1.69E-03 10 5.95% 5641 1.39E-02 18 6.33% 6001 1.48E-02 3 0.60% 571 1.31E-03 11 5.73% 5430 1.34E-02 19 5.61% 5319 1.22E-02 4 0.65% 620 1.42E-03 12 5.85% 5548 1.37E-02 20 4.51% 4269 9.80E-03 5 1.29% 1219 2.80E-03 13 6.07% 5749 1.42E-02 21 3.87% 3669 8.42E-03 6 3.08% 2922 6.71E-03 14 5.84% 5532 1.37E-02 22 3.48% 3297 7.57E-03 7 4.76% 4512 1.04E-02 15 5.96% 5644 1.40E-02 23 2.69% 2552 5.86E-03 8 5.70% 5403 1.34E-02 16 5.98% 5666 1.40E-02 24 1.82% 1722 3.95E-03 Total 94,760
2023 Hourly Traffic Volumes Per Direction and TOG Evaporative Emissions - TEVAP_SB_AIR Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.26% 1196 2.96E-03 9 6.16% 5840 1.44E-02 17 6.02% 5704 1.53E-02 2 0.78% 736 1.82E-03 10 5.95% 5641 1.51E-02 18 6.33% 6001 1.61E-02 3 0.60% 571 1.41E-03 11 5.73% 5430 1.45E-02 19 5.61% 5319 1.42E-02 4 0.65% 620 1.53E-03 12 5.85% 5548 1.49E-02 20 4.51% 4269 1.06E-02 5 1.29% 1219 3.01E-03 13 6.07% 5749 1.54E-02 21 3.87% 3669 9.07E-03 6 3.08% 2922 7.22E-03 14 5.84% 5532 1.48E-02 22 3.48% 3297 8.15E-03 7 4.76% 4512 1.12E-02 15 5.96% 5644 1.51E-02 23 2.69% 2552 6.31E-03 8 5.70% 5403 1.34E-02 16 5.98% 5666 1.52E-02 24 1.82% 1722 4.26E-03 Total 94,760

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Cumulative Operation - Highway 101
Fugitive Road PM2.5 Modeling - Roadway Links, Traffic Volumes, and Fugitive Road PM2.5 Emissions Year = 2023
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
FUG_NB_AIR Highway 101 Northbound NB 4 758.0 0.47 20.6 68 1.3 67.708333 94,760 FUG_SB_AIR Highway 101 Southbound SB 4 757.9 0.47 20.6 68 1.3 62.916667 94,760 Total 189,520
Emission Factors - Fugitive PM2.5
Speed Category 1 234
Travel Speed (mph) 70 65 60
Tire Wear - Emissions per Vehicle (g/VMT) 0.00206 0.00206 0.00206 Brake Wear - Emissions per Vehicle (g/VMT) 0.01720 0.01720 0.01720 Road Dust - Emissions per Vehicle (g/VMT) 0.00769 0.00769 0.00769 otal Fugitive PM2.5 - Emissions per Vehicle (g/VMT) 0.02694 0.02694 0.02694 Emisson Factors from CT-EMFAC2017
2023 Hourly Traffic Volumes and Fugitive PM2.5 Emissions - FUG_NB_AIR Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.26% 1196 4.22E-03 9 6.16% 5840 2.06E-02 17 6.02% 5704 2.01E-02 2 0.78% 736 2.59E-03 10 5.95% 5641 1.99E-02 18 6.33% 6001 2.11E-02 3 0.60% 571 2.01E-03 11 5.73% 5430 1.91E-02 19 5.61% 5319 1.87E-02 4 0.65% 620 2.19E-03 12 5.85% 5548 1.96E-02 20 4.51% 4269 1.50E-02 5 1.29% 1219 4.29E-03 13 6.07% 5749 2.03E-02 21 3.87% 3669 1.29E-02 6 3.08% 2922 1.03E-02 14 5.84% 5532 1.95E-02 22 3.48% 3297 1.16E-02 7 4.76% 4512 1.59E-02 15 5.96% 5644 1.99E-02 23 2.69% 2552 8.99E-03 8 5.70% 5403 1.90E-02 16 5.98% 5666 2.00E-02 24 1.82% 1722 6.07E-03 Total 94,760
2023 Hourly Traffic Volumes Per Direction and Fugitive PM2.5 Emissions - FUG_SB_AIR Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.26% 1196 4.22E-03 9 6.16% 5840 2.06E-02 17 6.02% 5704 2.01E-02 2 0.78% 736 2.59E-03 10 5.95% 5641 1.99E-02 18 6.33% 6001 2.11E-02 3 0.60% 571 2.01E-03 11 5.73% 5430 1.91E-02 19 5.61% 5319 1.87E-02 4 0.65% 620 2.18E-03 12 5.85% 5548 1.95E-02 20 4.51% 4269 1.50E-02 5 1.29% 1219 4.29E-03 13 6.07% 5749 2.03E-02 21 3.87% 3669 1.29E-02 6 3.08% 2922 1.03E-02 14 5.84% 5532 1.95E-02 22 3.48% 3297 1.16E-02 7 4.76% 4512 1.59E-02 15 5.96% 5644 1.99E-02 23 2.69% 2552 8.99E-03 8 5.70% 5403 1.90E-02 16 5.98% 5666 2.00E-02 24 1.82% 1722 6.07E-03 Total 94,760

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Cumulative Operation - Airport Blvd
DPM Modeling - Roadway Links, Traffic Volumes, and DPM Emissions Year = 2023
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
DPM_NB_AIR Airport Blvd Northbound NB 2 759.4 0.47 13.3 43.7 3.4 35 11,196 DPM_SB_AIR Airport Blvd Southbound SB 2 759.6 0.47 13.3 43.7 3.4 35 11,196 Total 22,392
Emission Factors
Speed Category 1 234
Travel Speed (mph) 35
Emissions per Vehicle (g/VMT) 0.00025
Emisson Factors from CT-EMFAC2017
2023 Hourly Traffic Volumes and DPM Emissions - DPM_NB_AIR Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 3.81% 427 1.42E-05 9 6.66% 746 2.47E-05 17 6.50% 728 2.41E-05 2 3.15% 353 1.17E-05 10 8.16% 913 3.03E-05 18 3.85% 431 1.43E-05 3 2.32% 260 8.62E-06 11 6.33% 709 2.35E-05 19 2.35% 263 8.74E-06 4 1.00% 111 3.69E-06 12 7.66% 858 2.84E-05 20 1.19% 133 4.43E-06 5 1.00% 111 3.69E-06 13 6.83% 765 2.54E-05 21 3.02% 338 1.12E-05 6 2.16% 241 8.00E-06 14 6.66% 746 2.47E-05 22 5.01% 560 1.86E-05 7 4.67% 523 1.74E-05 15 6.00% 672 2.23E-05 23 3.32% 371 1.23E-05 8 3.35% 375 1.24E-05 16 4.34% 486 1.61E-05 24 0.66% 74 2.46E-06 Total 11,196
2023 Hourly Traffic Volumes Per Direction and DPM Emissions - DPM_SB_AIR Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 3.81% 427 1.42E-05 9 6.66% 746 2.48E-05 17 6.50% 728 2.41E-05 2 3.15% 353 1.17E-05 10 8.16% 913 3.03E-05 18 3.85% 431 1.43E-05 3 2.32% 260 8.62E-06 11 6.33% 709 2.35E-05 19 2.35% 263 8.74E-06 4 1.00% 111 3.70E-06 12 7.66% 858 2.84E-05 20 1.19% 133 4.43E-06 5 1.00% 111 3.70E-06 13 6.83% 765 2.54E-05 21 3.02% 338 1.12E-05 6 2.16% 241 8.01E-06 14 6.66% 746 2.48E-05 22 5.01% 560 1.86E-05 7 4.67% 523 1.74E-05 15 6.00% 672 2.23E-05 23 3.32% 371 1.23E-05 8 3.35% 375 1.24E-05 16 4.34% 486 1.61E-05 24 0.66% 74 2.46E-06 Total 11,196

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Cumulative Operation - Airport Blvd
PM2.5 Modeling - Roadway Links, Traffic Volumes, and PM2.5 Emissions Year = 2023
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
PM2.5_NB_AIR Airport Blvd Northbound NB 2 759.4 0.47 13.3 44 1.3 35 11,196 PM2.5_SB_AIR Airport Blvd Southbound SB 2 759.6 0.47 13.3 44 1.3 35 11,196 Total 22,392
Emission Factors - PM2.5
Speed Category 1 234
Travel Speed (mph) 35
Emissions per Vehicle (g/VMT) 0.001407
Emisson Factors from CT-EMFAC2017
2023 Hourly Traffic Volumes and PM2.5 Emissions - PM2.5_NB_AIR Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.12% 125 2.31E-05 9 7.12% 797 1.47E-04 17 7.43% 832 1.53E-04 2 0.41% 46 8.53E-06 10 4.37% 490 9.03E-05 18 8.24% 922 1.70E-04 3 0.37% 42 7.74E-06 11 4.65% 521 9.60E-05 19 5.72% 640 1.18E-04 4 0.17% 19 3.52E-06 12 5.89% 659 1.22E-04 20 4.30% 482 8.88E-05 5 0.46% 52 9.50E-06 13 6.17% 691 1.27E-04 21 3.25% 364 6.71E-05 6 0.85% 95 1.75E-05 14 6.05% 678 1.25E-04 22 3.31% 371 6.84E-05 7 3.73% 418 7.70E-05 15 7.06% 790 1.46E-04 23 2.48% 278 5.13E-05 8 7.77% 870 1.60E-04 16 7.19% 805 1.48E-04 24 1.87% 210 3.87E-05 Total 11,196
2023 Hourly Traffic Volumes Per Direction and PM2.5 Emissions - PM2.5_SB_AIR Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.12% 125 2.31E-05 9 7.12% 797 1.47E-04 17 7.43% 832 1.54E-04 2 0.41% 46 8.53E-06 10 4.37% 490 9.03E-05 18 8.24% 922 1.70E-04 3 0.37% 42 7.74E-06 11 4.65% 521 9.61E-05 19 5.72% 640 1.18E-04 4 0.17% 19 3.52E-06 12 5.89% 659 1.22E-04 20 4.30% 482 8.89E-05 5 0.46% 52 9.50E-06 13 6.17% 691 1.27E-04 21 3.25% 364 6.71E-05 6 0.85% 95 1.75E-05 14 6.05% 678 1.25E-04 22 3.31% 371 6.84E-05 7 3.73% 418 7.71E-05 15 7.06% 790 1.46E-04 23 2.48% 278 5.13E-05 8 7.77% 870 1.60E-04 16 7.19% 805 1.48E-04 24 1.87% 210 3.87E-05 Total 11,196

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Cumulative Operation - Airport Blvd
TOG Exhaust Modeling - Roadway Links, Traffic Volumes, and TOG Exhaust Emissions Year = 2023
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
TEXH_NB_AIR Airport Blvd Northbound NB 2 759.4 0.47 13.3 44 1.3 35 11,196 TEXH_SB_AIR
Airport Blvd
Southbound SB 2 759.6 0.47 13.3 44 1.3 35 11,196
Total 22,392
Emission Factors - TOG Exhaust
Speed Category 1 234
Travel Speed (mph) 35
Emissions per Vehicle (g/VMT) 0.03611
Emisson Factors from CT-EMFAC2017
2023 Hourly Traffic Volumes and TOG Exhaust Emissions - TEXH_NB_AIR Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.12% 125 5.94E-04 9 7.12% 797 3.77E-03 17 7.43% 832 3.94E-03 2 0.41% 46 2.19E-04 10 4.37% 490 2.32E-03 18 8.24% 922 4.37E-03 3 0.37% 42 1.99E-04 11 4.65% 521 2.46E-03 19 5.72% 640 3.03E-03 4 0.17% 19 9.03E-05 12 5.89% 659 3.12E-03 20 4.30% 482 2.28E-03 5 0.46% 52 2.44E-04 13 6.17% 691 3.27E-03 21 3.25% 364 1.72E-03 6 0.85% 95 4.49E-04 14 6.05% 678 3.21E-03 22 3.31% 371 1.76E-03 7 3.73% 418 1.98E-03 15 7.06% 790 3.74E-03 23 2.48% 278 1.32E-03 8 7.77% 870 4.12E-03 16 7.19% 805 3.81E-03 24 1.87% 210 9.93E-04 Total 11,196
2023 Hourly Traffic Volumes Per Direction and TOG Exhaust Emissions - TEXH_SB_AIR Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.12% 125 5.94E-04 9 7.12% 797 3.77E-03 17 7.43% 832 3.94E-03 2 0.41% 46 2.19E-04 10 4.37% 490 2.32E-03 18 8.24% 922 4.37E-03 3 0.37% 42 1.99E-04 11 4.65% 521 2.47E-03 19 5.72% 640 3.03E-03 4 0.17% 19 9.03E-05 12 5.89% 659 3.12E-03 20 4.30% 482 2.28E-03 5 0.46% 52 2.44E-04 13 6.17% 691 3.27E-03 21 3.25% 364 1.72E-03 6 0.85% 95 4.49E-04 14 6.05% 678 3.21E-03 22 3.31% 371 1.76E-03 7 3.73% 418 1.98E-03 15 7.06% 790 3.74E-03 23 2.48% 278 1.32E-03 8 7.77% 870 4.12E-03 16 7.19% 805 3.81E-03 24 1.87% 210 9.93E-04 Total 11,196

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Cumulative Operation - Airport Blvd
TOG Evaporative Emissions Modeling - Roadway Links, Traffic Volumes, and TOG Evaporative Emissions Year = 2023
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
TEVAP_NB_AIR Airport Blvd Northbound NB 2 759.4 0.47 13.3 44 1.3 35 11,196 TEVAP_SB_AIR Airport Blvd Southbound SB 2 759.6 0.47 13.3 44 1.3 35 11,196 Total 22,392
Emission Factors - PM2.5 - Evaporative TOG
Speed Category 1 234
Travel Speed (mph) 35
Emissions per Vehicle per Hour (g/hour) 1.19210
Emissions per Vehicle per Mile (g/VMT) 0.03406
Emisson Factors from CT-EMFAC2017
2023 Hourly Traffic Volumes and TOG Evaporative Emissions - TEVAP_NB_AIR Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.12% 125 5.60E-04 9 7.12% 797 3.56E-03 17 7.43% 832 3.72E-03 2 0.41% 46 2.07E-04 10 4.37% 490 2.19E-03 18 8.24% 922 4.12E-03 3 0.37% 42 1.87E-04 11 4.65% 521 2.32E-03 19 5.72% 640 2.86E-03 4 0.17% 19 8.52E-05 12 5.89% 659 2.94E-03 20 4.30% 482 2.15E-03 5 0.46% 52 2.30E-04 13 6.17% 691 3.08E-03 21 3.25% 364 1.62E-03 6 0.85% 95 4.24E-04 14 6.05% 678 3.03E-03 22 3.31% 371 1.66E-03 7 3.73% 418 1.87E-03 15 7.06% 790 3.53E-03 23 2.48% 278 1.24E-03 8 7.77% 870 3.88E-03 16 7.19% 805 3.59E-03 24 1.87% 210 9.37E-04 Total 11,196
2023 Hourly Traffic Volumes Per Direction and TOG Evaporative Emissions - TEVAP_SB_AIR Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.12% 125 5.60E-04 9 7.12% 797 3.56E-03 17 7.43% 832 3.72E-03 2 0.41% 46 2.07E-04 10 4.37% 490 2.19E-03 18 8.24% 922 4.12E-03 3 0.37% 42 1.87E-04 11 4.65% 521 2.33E-03 19 5.72% 640 2.86E-03 4 0.17% 19 8.52E-05 12 5.89% 659 2.94E-03 20 4.30% 482 2.15E-03 5 0.46% 52 2.30E-04 13 6.17% 691 3.08E-03 21 3.25% 364 1.62E-03 6 0.85% 95 4.24E-04 14 6.05% 678 3.03E-03 22 3.31% 371 1.66E-03 7 3.73% 418 1.87E-03 15 7.06% 790 3.53E-03 23 2.48% 278 1.24E-03 8 7.77% 870 3.88E-03 16 7.19% 805 3.59E-03 24 1.87% 210 9.37E-04 Total 11,196

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Cumulative Operation - Airport Blvd
Fugitive Road PM2.5 Modeling - Roadway Links, Traffic Volumes, and Fugitive Road PM2.5 Emissions Year = 2023
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
FUG_NB_AIR Airport Blvd Northbound NB 2 759.4 0.47 13.3 44 1.3 35 11,196 FUG_SB_AIR Airport Blvd Southbound SB 2 759.6 0.47 13.3 44 1.3 35 11,196 Total 22,392
Emission Factors - Fugitive PM2.5
Speed Category 1 234
Travel Speed (mph) 35
Tire Wear - Emissions per Vehicle (g/VMT) 0.00205
Brake Wear - Emissions per Vehicle (g/VMT) 0.01681
Road Dust - Emissions per Vehicle (g/VMT) 0.01487
otal Fugitive PM2.5 - Emissions per Vehicle (g/VMT) 0.03373 Emisson Factors from CT-EMFAC2017
2023 Hourly Traffic Volumes and Fugitive PM2.5 Emissions - FUG_NB_AIR Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.12% 125 5.54E-04 9 7.12% 797 3.52E-03 17 7.43% 832 3.68E-03 2 0.41% 46 2.04E-04 10 4.37% 490 2.17E-03 18 8.24% 922 4.08E-03 3 0.37% 42 1.86E-04 11 4.65% 521 2.30E-03 19 5.72% 640 2.83E-03 4 0.17% 19 8.43E-05 12 5.89% 659 2.91E-03 20 4.30% 482 2.13E-03 5 0.46% 52 2.28E-04 13 6.17% 691 3.05E-03 21 3.25% 364 1.61E-03 6 0.85% 95 4.20E-04 14 6.05% 678 3.00E-03 22 3.31% 371 1.64E-03 7 3.73% 418 1.85E-03 15 7.06% 790 3.49E-03 23 2.48% 278 1.23E-03 8 7.77% 870 3.85E-03 16 7.19% 805 3.56E-03 24 1.87% 210 9.28E-04 Total 11,196
2023 Hourly Traffic Volumes Per Direction and Fugitive PM2.5 Emissions - FUG_SB_AIR Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.12% 125 5.55E-04 9 7.12% 797 3.52E-03 17 7.43% 832 3.68E-03 2 0.41% 46 2.05E-04 10 4.37% 490 2.17E-03 18 8.24% 922 4.08E-03 3 0.37% 42 1.86E-04 11 4.65% 521 2.30E-03 19 5.72% 640 2.83E-03 4 0.17% 19 8.43E-05 12 5.89% 659 2.91E-03 20 4.30% 482 2.13E-03 5 0.46% 52 2.28E-04 13 6.17% 691 3.05E-03 21 3.25% 364 1.61E-03 6 0.85% 95 4.20E-04 14 6.05% 678 3.00E-03 22 3.31% 371 1.64E-03 7 3.73% 418 1.85E-03 15 7.06% 790 3.49E-03 23 2.48% 278 1.23E-03 8 7.77% 870 3.85E-03 16 7.19% 805 3.56E-03 24 1.87% 210 9.28E-04 Total 11,196

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Cumulative Operation - Dubuque Ave
DPM Modeling - Roadway Links, Traffic Volumes, and DPM Emissions Year = 2023
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
DPM_NB_DUB
Dubuque Avenue
Northbound NB 1 773.1 0.48 9.7 31.7 3.4 30 9,325
DPM_SB_DUB
Dubuque Avenue
Southbound SB 1 767.5 0.48 9.7 31.7 3.4 30 9,325
Total 18,650
Emission Factors
Speed Category 1 234
Travel Speed (mph) 30
Emissions per Vehicle (g/VMT) 0.00026
Emisson Factors from CT-EMFAC2017
2023 Hourly Traffic Volumes and DPM Emissions - DPM_NB_DUB Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 3.81% 356 1.25E-05 9 6.66% 621 2.19E-05 17 6.50% 606 2.13E-05 2 3.15% 294 1.04E-05 10 8.16% 761 2.68E-05 18 3.85% 359 1.26E-05 3 2.32% 216 7.63E-06 11 6.33% 591 2.08E-05 19 2.35% 219 7.73E-06 4 1.00% 93 3.27E-06 12 7.66% 714 2.52E-05 20 1.19% 111 3.92E-06 5 1.00% 93 3.27E-06 13 6.83% 637 2.24E-05 21 3.02% 281 9.91E-06 6 2.16% 201 7.08E-06 14 6.66% 621 2.19E-05 22 5.01% 467 1.64E-05 7 4.67% 436 1.54E-05 15 6.00% 560 1.97E-05 23 3.32% 309 1.09E-05 8 3.35% 312 1.10E-05 16 4.34% 405 1.43E-05 24 0.66% 62 2.18E-06 Total 9,325
2023 Hourly Traffic Volumes Per Direction and DPM Emissions - DPM_SB_DUB Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 3.81% 356 1.24E-05 9 6.66% 621 2.17E-05 17 6.50% 606 2.12E-05 2 3.15% 294 1.03E-05 10 8.16% 761 2.66E-05 18 3.85% 359 1.25E-05 3 2.32% 216 7.57E-06 11 6.33% 591 2.07E-05 19 2.35% 219 7.67E-06 4 1.00% 93 3.24E-06 12 7.66% 714 2.50E-05 20 1.19% 111 3.89E-06 5 1.00% 93 3.24E-06 13 6.83% 637 2.23E-05 21 3.02% 281 9.84E-06 6 2.16% 201 7.03E-06 14 6.66% 621 2.17E-05 22 5.01% 467 1.63E-05 7 4.67% 436 1.52E-05 15 6.00% 560 1.96E-05 23 3.32% 309 1.08E-05 8 3.35% 312 1.09E-05 16 4.34% 405 1.42E-05 24 0.66% 62 2.16E-06 Total 9,325

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Cumulative Operation - Dubuque Ave
PM2.5 Modeling - Roadway Links, Traffic Volumes, and PM2.5 Emissions Year = 2023
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
PM2.5_NB_DUB
Dubuque Avenue
Northbound NB 1 773.1 0.48 9.7 32 1.3 30 9,325
PM2.5_SB_DUB
Dubuque Avenue
Southbound SB 1 767.5 0.48 9.7 32 1.3 30 9,325
Total 18,650
Emission Factors - PM2.5
Speed Category 1 234
Travel Speed (mph) 30
Emissions per Vehicle (g/VMT) 0.001668
Emisson Factors from CT-EMFAC2017
2023 Hourly Traffic Volumes and PM2.5 Emissions - PM2.5_NB_DUB Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.12% 104 2.33E-05 9 7.12% 664 1.48E-04 17 7.43% 693 1.54E-04 2 0.41% 39 8.58E-06 10 4.37% 408 9.08E-05 18 8.24% 768 1.71E-04 3 0.37% 35 7.78E-06 11 4.65% 434 9.65E-05 19 5.72% 533 1.19E-04 4 0.17% 16 3.54E-06 12 5.89% 549 1.22E-04 20 4.30% 401 8.93E-05 5 0.46% 43 9.55E-06 13 6.17% 575 1.28E-04 21 3.25% 303 6.75E-05 6 0.85% 79 1.76E-05 14 6.05% 564 1.26E-04 22 3.31% 309 6.88E-05 7 3.73% 348 7.74E-05 15 7.06% 658 1.46E-04 23 2.48% 232 5.15E-05 8 7.77% 724 1.61E-04 16 7.19% 670 1.49E-04 24 1.87% 175 3.89E-05 Total 9,325
2023 Hourly Traffic Volumes Per Direction and PM2.5 Emissions - PM2.5_SB_DUB Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.12% 104 2.31E-05 9 7.12% 664 1.47E-04 17 7.43% 693 1.53E-04 2 0.41% 39 8.51E-06 10 4.37% 408 9.01E-05 18 8.24% 768 1.70E-04 3 0.37% 35 7.72E-06 11 4.65% 434 9.58E-05 19 5.72% 533 1.18E-04 4 0.17% 16 3.51E-06 12 5.89% 549 1.21E-04 20 4.30% 401 8.86E-05 5 0.46% 43 9.48E-06 13 6.17% 575 1.27E-04 21 3.25% 303 6.70E-05 6 0.85% 79 1.75E-05 14 6.05% 564 1.25E-04 22 3.31% 309 6.83E-05 7 3.73% 348 7.69E-05 15 7.06% 658 1.45E-04 23 2.48% 232 5.12E-05 8 7.77% 724 1.60E-04 16 7.19% 670 1.48E-04 24 1.87% 175 3.86E-05 Total 9,325

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Cumulative Operation - Dubuque Ave
TOG Exhaust Modeling - Roadway Links, Traffic Volumes, and TOG Exhaust Emissions Year = 2023
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
TEXH_NB_DUB
Dubuque Avenue
Northbound NB 1 773.1 0.48 9.7 32 1.3 30 9,325
TEXH_SB_DUB
Dubuque Avenue
Southbound SB 1 767.5 0.48 9.7 32 1.3 30 9,325
Total 18,650
Emission Factors - TOG Exhaust
Speed Category 1 234
Travel Speed (mph) 30
Emissions per Vehicle (g/VMT) 0.03611
Emisson Factors from CT-EMFAC2017
2023 Hourly Traffic Volumes and TOG Exhaust Emissions - TEXH_NB_DUB Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.12% 104 5.03E-04 9 7.12% 664 3.20E-03 17 7.43% 693 3.34E-03 2 0.41% 39 1.86E-04 10 4.37% 408 1.97E-03 18 8.24% 768 3.70E-03 3 0.37% 35 1.68E-04 11 4.65% 434 2.09E-03 19 5.72% 533 2.57E-03 4 0.17% 16 7.66E-05 12 5.89% 549 2.64E-03 20 4.30% 401 1.93E-03 5 0.46% 43 2.07E-04 13 6.17% 575 2.77E-03 21 3.25% 303 1.46E-03 6 0.85% 79 3.81E-04 14 6.05% 564 2.72E-03 22 3.31% 309 1.49E-03 7 3.73% 348 1.68E-03 15 7.06% 658 3.17E-03 23 2.48% 232 1.12E-03 8 7.77% 724 3.49E-03 16 7.19% 670 3.23E-03 24 1.87% 175 8.42E-04 Total 9,325
2023 Hourly Traffic Volumes Per Direction and TOG Exhaust Emissions - TEXH_SB_DUB Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.12% 104 5.00E-04 9 7.12% 664 3.17E-03 17 7.43% 693 3.32E-03 2 0.41% 39 1.84E-04 10 4.37% 408 1.95E-03 18 8.24% 768 3.67E-03 3 0.37% 35 1.67E-04 11 4.65% 434 2.07E-03 19 5.72% 533 2.55E-03 4 0.17% 16 7.60E-05 12 5.89% 549 2.63E-03 20 4.30% 401 1.92E-03 5 0.46% 43 2.05E-04 13 6.17% 575 2.75E-03 21 3.25% 303 1.45E-03 6 0.85% 79 3.78E-04 14 6.05% 564 2.70E-03 22 3.31% 309 1.48E-03 7 3.73% 348 1.66E-03 15 7.06% 658 3.15E-03 23 2.48% 232 1.11E-03 8 7.77% 724 3.47E-03 16 7.19% 670 3.21E-03 24 1.87% 175 8.36E-04 Total 9,325

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Cumulative Operation - Dubuque Ave
TOG Evaporative Emissions Modeling - Roadway Links, Traffic Volumes, and TOG Evaporative Emissions Year = 2023
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
TEVAP_NB_DUB
Dubuque Avenue
Northbound NB 1 773.1 0.48 9.7 32 1.3 30 9,325
TEVAP_SB_DUB
Dubuque Avenue
Southbound SB 1 767.5 0.48 9.7 32 1.3 30 9,325
Total 18,650
Emission Factors - PM2.5 - Evaporative TOG
Speed Category 1 234
Travel Speed (mph) 30
Emissions per Vehicle per Hour (g/hour) 1.19210
Emissions per Vehicle per Mile (g/VMT) 0.03974
Emisson Factors from CT-EMFAC2017
2023 Hourly Traffic Volumes and TOG Evaporative Emissions - TEVAP_NB_DUB Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.12% 104 5.54E-04 9 7.12% 664 3.52E-03 17 7.43% 693 3.68E-03 2 0.41% 39 2.04E-04 10 4.37% 408 2.16E-03 18 8.24% 768 4.07E-03 3 0.37% 35 1.85E-04 11 4.65% 434 2.30E-03 19 5.72% 533 2.83E-03 4 0.17% 16 8.42E-05 12 5.89% 549 2.91E-03 20 4.30% 401 2.13E-03 5 0.46% 43 2.27E-04 13 6.17% 575 3.05E-03 21 3.25% 303 1.61E-03 6 0.85% 79 4.19E-04 14 6.05% 564 2.99E-03 22 3.31% 309 1.64E-03 7 3.73% 348 1.84E-03 15 7.06% 658 3.49E-03 23 2.48% 232 1.23E-03 8 7.77% 724 3.84E-03 16 7.19% 670 3.56E-03 24 1.87% 175 9.27E-04 Total 9,325
2023 Hourly Traffic Volumes Per Direction and TOG Evaporative Emissions - TEVAP_SB_DUB Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.12% 104 5.50E-04 9 7.12% 664 3.49E-03 17 7.43% 693 3.65E-03 2 0.41% 39 2.03E-04 10 4.37% 408 2.15E-03 18 8.24% 768 4.04E-03 3 0.37% 35 1.84E-04 11 4.65% 434 2.28E-03 19 5.72% 533 2.81E-03 4 0.17% 16 8.36E-05 12 5.89% 549 2.89E-03 20 4.30% 401 2.11E-03 5 0.46% 43 2.26E-04 13 6.17% 575 3.03E-03 21 3.25% 303 1.60E-03 6 0.85% 79 4.16E-04 14 6.05% 564 2.97E-03 22 3.31% 309 1.63E-03 7 3.73% 348 1.83E-03 15 7.06% 658 3.46E-03 23 2.48% 232 1.22E-03 8 7.77% 724 3.81E-03 16 7.19% 670 3.53E-03 24 1.87% 175 9.20E-04 Total 9,325

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Cumulative Operation - Dubuque Ave
Fugitive Road PM2.5 Modeling - Roadway Links, Traffic Volumes, and Fugitive Road PM2.5 Emissions Year = 2023
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
FUG_NB_DUB
Dubuque Avenue
Northbound NB 1 773.1 0.48 9.7 32 1.3 30 9,325
FUG_SB_DUB
Dubuque Avenue
Southbound SB 1 767.5 0.48 9.7 32 1.3 30 9,325
Total 18,650
Emission Factors - Fugitive PM2.5
Speed Category 1 234
Travel Speed (mph) 30
Tire Wear - Emissions per Vehicle (g/VMT) 0.00205
Brake Wear - Emissions per Vehicle (g/VMT) 0.01681
Road Dust - Emissions per Vehicle (g/VMT) 0.01487
otal Fugitive PM2.5 - Emissions per Vehicle (g/VMT) 0.03373 Emisson Factors from CT-EMFAC2017
2023 Hourly Traffic Volumes and Fugitive PM2.5 Emissions - FUG_NB_DUB Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.12% 104 4.70E-04 9 7.12% 664 2.99E-03 17 7.43% 693 3.12E-03 2 0.41% 39 1.73E-04 10 4.37% 408 1.84E-03 18 8.24% 768 3.46E-03 3 0.37% 35 1.57E-04 11 4.65% 434 1.95E-03 19 5.72% 533 2.40E-03 4 0.17% 16 7.15E-05 12 5.89% 549 2.47E-03 20 4.30% 401 1.81E-03 5 0.46% 43 1.93E-04 13 6.17% 575 2.59E-03 21 3.25% 303 1.36E-03 6 0.85% 79 3.56E-04 14 6.05% 564 2.54E-03 22 3.31% 309 1.39E-03 7 3.73% 348 1.57E-03 15 7.06% 658 2.96E-03 23 2.48% 232 1.04E-03 8 7.77% 724 3.26E-03 16 7.19% 670 3.02E-03 24 1.87% 175 7.86E-04 Total 9,325
2023 Hourly Traffic Volumes Per Direction and Fugitive PM2.5 Emissions - FUG_SB_DUB Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.12% 104 4.67E-04 9 7.12% 664 2.97E-03 17 7.43% 693 3.10E-03 2 0.41% 39 1.72E-04 10 4.37% 408 1.82E-03 18 8.24% 768 3.43E-03 3 0.37% 35 1.56E-04 11 4.65% 434 1.94E-03 19 5.72% 533 2.38E-03 4 0.17% 16 7.10E-05 12 5.89% 549 2.45E-03 20 4.30% 401 1.79E-03 5 0.46% 43 1.92E-04 13 6.17% 575 2.57E-03 21 3.25% 303 1.35E-03 6 0.85% 79 3.53E-04 14 6.05% 564 2.52E-03 22 3.31% 309 1.38E-03 7 3.73% 348 1.55E-03 15 7.06% 658 2.94E-03 23 2.48% 232 1.03E-03 8 7.77% 724 3.24E-03 16 7.19% 670 3.00E-03 24 1.87% 175 7.81E-04 Total 9,325

800 Dubuque Ave, South San Francisco, CA - Highway 101 Traffic - TACs & PM2.5 AERMOD Risk Modeling Parameters and Maximum Concentrations at Construction Residential MEI Receptors (1 Location - 1 meter receptor height) Emission Year 2023
Receptor Information Construction School MEI receptor
Number of Receptors 1
Receptor Height 1 Meter
Receptor Distances At Construction School MEI location
Meteorological Conditions
BAAQMD San Francisco International Airport M 2013-2017
Land Use Classification Urban
Wind Speed Variable
Wind Direction Variable
Construction School MEI Cancer Risk Maximum Concentrations Meteorological
Data Years DPM Exhaust TOG Evaporative TOG
2013-2017 0.0022 0.1500 0.0789
Construction School MEI PM2.5 Maximum Concentrations
Meteorological
Data Years Total PM2.5 Fugitive PM2.5 Vehicle PM2.5
2013-2017 0.1201 0.1133 0.0068
Concentration (μg/m3)*
PM2.5 Concentration (μg/m3)*

800 Dubuque Ave, South San Francisco, CA - Airport Blvd Traffic - TACs & PM2.5 AERMOD Risk Modeling Parameters and Maximum Concentrations at Construction Residential MEI Receptors (1 Location - 1 meter receptor height) Emission Year 2023
Receptor Information Construction School MEI receptor
Number of Receptors 1
Receptor Height 1 Meter
Receptor Distances At Construction School MEI location
Meteorological Conditions
BAAQMD San Francisco International Airport M 2013-2017
Land Use Classification Urban
Wind Speed Variable
Wind Direction Variable
Construction School MEI Cancer Risk Maximum Concentrations Meteorological
Data Years DPM Exhaust TOG Evaporative TOG
2013-2017 0.0001 0.0147 0.0138
Construction School MEI PM2.5 Maximum Concentrations
Meteorological
Data Years Total PM2.5 Fugitive PM2.5 Vehicle PM2.5
2013-2017 0.0143 0.0137 0.0006
Concentration (μg/m3)*
PM2.5 Concentration (μg/m3)*

800 Dubuque Ave, South San Francisco, CA - Dubuque Avenue Traffic - TACs & PM2.5 AERMOD Risk Modeling Parameters and Maximum Concentrations at Construction Residential MEI Receptors (1 Location - 1 meter receptor height) Emission Year 2023
Receptor Information Construction School MEI receptor
Number of Receptors 1
Receptor Height 1 Meter
Receptor Distances At Construction School MEI location
Meteorological Conditions
BAAQMD San Francisco International Airport M 2013-2017
Land Use Classification Urban
Wind Speed Variable
Wind Direction Variable
Construction School MEI Cancer Risk Maximum Concentrations Meteorological
Data Years DPM Exhaust TOG Evaporative TOG
2013-2017 0.0001 0.0157 0.0173
Construction School MEI PM2.5 Maximum Concentrations
Meteorological
Data Years Total PM2.5 Fugitive PM2.5 Vehicle PM2.5
2013-2017 0.0154 0.0147 0.0007
Concentration (μg/m3)*
PM2.5 Concentration (μg/m3)*

800 Dubuque Ave, South San Francisco, CA - Highway 101 Traffic Cancer Risk Impacts at Construction School MEI - 1 meter receptor height 30 Year Residential Exposure
Cancer Risk Calculation Method
Cancer Risk (per million) =CPF x Inhalation Dose x ASF x ED/AT x FAH x 1.0E6 Where: CPF = Cancer potency factor (mg/kg-day)-1
ASF = Age sensitivity factor for specified age group
ED = Exposure duration (years)
AT = Averaging time for lifetime cancer risk (years)
FAH = Fraction of time spent at home (unitless)
Inhalation Dose = Cair x DBR x A x (EF/365) x 10-6
Where: Cair = concentration in air (μg/m3)
DBR = daily breathing rate (L/kg body weight-day)
A = Inhalation absorption factor
EF = Exposure frequency (days/year)
10-6 = Conversion factor
Cancer Potency Factors (mg/kg-day)-1
CPF

1.10E+00
Vehicle TOG Exhaust 6.28E-03
Vehicle TOG Evaporative 3.70E-04
Values
Infant/Child Adult
Age --> 3rd Trimester 0 - 2 2 - 16 16 - 30
Parameter
ASF = 10 10 3 1
DBR* = 361 1090 572 261
A = 1 1 1 1
EF = 350 350 350 350
AT = 70 70 70 70
FAH = 1.00 1.00 1.00 0.73
* 95th percentile breathing rates for infants and 80th percentile for children and adults Construction Cancer Risk by Year - Maximum Impact Receptor Location Exposure
Exposure Duration DPM
Exhaust
TOG
Evaporative

TOG DPM
Year (years) Age
0 0.25 -0.25 - 0* 10 0.0022 0.1500 0.0789 0.030 0.012 0.0004 0.04 Hazard
Index
Fugitive
PM2.5
Total
PM2.5
1 1 0 - 1 10 0.0022 0.1500 0.0789 0.360 0.141 0.0044 0.50 0.0004 0.11 0.12 2 1 1 - 2 10 0.0022 0.1500 0.0789 0.360 0.141 0.0044 0.50 3 1 2 - 3 3 0.0022 0.1500 0.0789 0.057 0.022 0.0007 0.08 4 1 3 - 4 3 0.0022 0.1500 0.0789 0.057 0.022 0.0007 0.08 5 1 4 - 5 3 0.0022 0.1500 0.0789 0.057 0.022 0.0007 0.08 6 1 5 - 6 3 0.0022 0.1500 0.0789 0.057 0.022 0.0007 0.08 7 1 6 - 7 3 0.0022 0.1500 0.0789 0.057 0.022 0.0007 0.08 8 1 7 - 8 3 0.0022 0.1500 0.0789 0.057 0.022 0.0007 0.08 9 1 8 - 9 3 0.0022 0.1500 0.0789 0.057 0.022 0.0007 0.08 10 1 9 - 10 3 0.0022 0.1500 0.0789 0.057 0.022 0.0007 0.08 11 1 10 - 11 3 0.0022 0.1500 0.0789 0.057 0.022 0.0007 0.08 12 1 11 - 12 3 0.0022 0.1500 0.0789 0.057 0.022 0.0007 0.08 13 1 12 - 13 3 0.0022 0.1500 0.0789 0.057 0.022 0.0007 0.08 14 1 13 - 14 3 0.0022 0.1500 0.0789 0.057 0.022 0.0007 0.08 15 1 14 - 15 3 0.0022 0.1500 0.0789 0.057 0.022 0.0007 0.08 16 1 15 - 16 3 0.0022 0.1500 0.0789 0.057 0.022 0.0007 0.08 17 1 16-17 1 0.0022 0.1500 0.0789 0.006 0.002 0.0001 0.01 18 1 17-18 1 0.0022 0.1500 0.0789 0.006 0.002 0.0001 0.01 19 1 18-19 1 0.0022 0.1500 0.0789 0.006 0.002 0.0001 0.01 20 1 19-20 1 0.0022 0.1500 0.0789 0.006 0.002 0.0001 0.01 21 1 20-21 1 0.0022 0.1500 0.0789 0.006 0.002 0.0001 0.01 22 1 21-22 1 0.0022 0.1500 0.0789 0.006 0.002 0.0001 0.01 23 1 22-23 1 0.0022 0.1500 0.0789 0.006 0.002 0.0001 0.01 24 1 23-24 1 0.0022 0.1500 0.0789 0.006 0.002 0.0001 0.01 25 1 24-25 1 0.0022 0.1500 0.0789 0.006 0.002 0.0001 0.01 26 1 25-26 1 0.0022 0.1500 0.0789 0.006 0.002 0.0001 0.01 27 1 26-27 1 0.0022 0.1500 0.0789 0.006 0.002 0.0001 0.01 28 1 27-28 1 0.0022 0.1500 0.0789 0.006 0.002 0.0001 0.01 29 1 28-29 1 0.0022 0.1500 0.0789 0.006 0.002 0.0001 0.01 30 1 29-30 1 0.0022 0.1500 0.0789 0.006 0.002 0.0001 0.01 Total Increased Cancer Risk 1.63 0.637 0.020 2.29
* Third trimester of pregnancy
2027
2028
2029
2030
TAC
DPM
Maximum - Exposure Information
2026
Maximum
2023
2023
2024
2025
TOTAL
Year
Age
Sensitivity
Factor
Exhaust
TOG
Evaporative
TOG
Concentration (ug/m3) Cancer Risk (per million)
2031
2044
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2032
2051
2052
2045
2046
2047
2048
2049
2050

800 Dubuque Ave, South San Francisco, CA - Airport Blvd Traffic Cancer Risk Impacts at Construction School MEI - 1 meter receptor height 30 Year Residential Exposure
Cancer Risk Calculation Method
Cancer Risk (per million) =CPF x Inhalation Dose x ASF x ED/AT x FAH x 1.0E6 Where: CPF = Cancer potency factor (mg/kg-day)-1
ASF = Age sensitivity factor for specified age group
ED = Exposure duration (years)
AT = Averaging time for lifetime cancer risk (years)
FAH = Fraction of time spent at home (unitless)
Inhalation Dose = Cair x DBR x A x (EF/365) x 10-6
Where: Cair = concentration in air (μg/m3)
DBR = daily breathing rate (L/kg body weight-day)
A = Inhalation absorption factor
EF = Exposure frequency (days/year)
10-6 = Conversion factor
Cancer Potency Factors (mg/kg-day)-1
CPF

TOG DPM
Year (years) Age
0 0.25 -0.25 - 0* 10 0.0001 0.0147 0.0138 0.001 0.001 0.0001 0.00 Hazard
Index
Fugitive
PM2.5
Total
PM2.5
1 1 0 - 1 10 0.0001 0.0147 0.0138 0.018 0.014 0.0008 0.03 0.0000 0.01 0.01 2 1 1 - 2 10 0.0001 0.0147 0.0138 0.018 0.014 0.0008 0.03 3 1 2 - 3 3 0.0001 0.0147 0.0138 0.003 0.002 0.0001 0.01 4 1 3 - 4 3 0.0001 0.0147 0.0138 0.003 0.002 0.0001 0.01 5 1 4 - 5 3 0.0001 0.0147 0.0138 0.003 0.002 0.0001 0.01 6 1 5 - 6 3 0.0001 0.0147 0.0138 0.003 0.002 0.0001 0.01 7 1 6 - 7 3 0.0001 0.0147 0.0138 0.003 0.002 0.0001 0.01 8 1 7 - 8 3 0.0001 0.0147 0.0138 0.003 0.002 0.0001 0.01 9 1 8 - 9 3 0.0001 0.0147 0.0138 0.003 0.002 0.0001 0.01 10 1 9 - 10 3 0.0001 0.0147 0.0138 0.003 0.002 0.0001 0.01 11 1 10 - 11 3 0.0001 0.0147 0.0138 0.003 0.002 0.0001 0.01 12 1 11 - 12 3 0.0001 0.0147 0.0138 0.003 0.002 0.0001 0.01 13 1 12 - 13 3 0.0001 0.0147 0.0138 0.003 0.002 0.0001 0.01 14 1 13 - 14 3 0.0001 0.0147 0.0138 0.003 0.002 0.0001 0.01 15 1 14 - 15 3 0.0001 0.0147 0.0138 0.003 0.002 0.0001 0.01 16 1 15 - 16 3 0.0001 0.0147 0.0138 0.003 0.002 0.0001 0.01 17 1 16-17 1 0.0001 0.0147 0.0138 0.000 0.000 0.0000 0.00 18 1 17-18 1 0.0001 0.0147 0.0138 0.000 0.000 0.0000 0.00 19 1 18-19 1 0.0001 0.0147 0.0138 0.000 0.000 0.0000 0.00 20 1 19-20 1 0.0001 0.0147 0.0138 0.000 0.000 0.0000 0.00 21 1 20-21 1 0.0001 0.0147 0.0138 0.000 0.000 0.0000 0.00 22 1 21-22 1 0.0001 0.0147 0.0138 0.000 0.000 0.0000 0.00 23 1 22-23 1 0.0001 0.0147 0.0138 0.000 0.000 0.0000 0.00 24 1 23-24 1 0.0001 0.0147 0.0138 0.000 0.000 0.0000 0.00 25 1 24-25 1 0.0001 0.0147 0.0138 0.000 0.000 0.0000 0.00 26 1 25-26 1 0.0001 0.0147 0.0138 0.000 0.000 0.0000 0.00 27 1 26-27 1 0.0001 0.0147 0.0138 0.000 0.000 0.0000 0.00 28 1 27-28 1 0.0001 0.0147 0.0138 0.000 0.000 0.0000 0.00 29 1 28-29 1 0.0001 0.0147 0.0138 0.000 0.000 0.0000 0.00 30 1 29-30 1 0.0001 0.0147 0.0138 0.000 0.000 0.0000 0.00 Total Increased Cancer Risk 0.08 0.062 0.003 0.15
* Third trimester of pregnancy
2051
2052
2045
2046
2047
2048
2049
2050
2031
2044
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2032
Maximum
2023
2023
2024
2025
TOTAL
Year
Age
Sensitivity
Factor
Exhaust
TOG
Evaporative
TOG
Concentration (ug/m3) Cancer Risk (per million)
2027
2028
2029
2030
TAC
DPM
Maximum - Exposure Information
2026

800 Dubuque Ave, South San Francisco, CA - Dubuque Avenue Traffic Cancer Risk Impacts at Construction School MEI - 1 meter receptor height 30 Year Residential Exposure
Cancer Risk Calculation Method
Cancer Risk (per million) =CPF x Inhalation Dose x ASF x ED/AT x FAH x 1.0E6 Where: CPF = Cancer potency factor (mg/kg-day)-1
ASF = Age sensitivity factor for specified age group
ED = Exposure duration (years)
AT = Averaging time for lifetime cancer risk (years)
FAH = Fraction of time spent at home (unitless)
Inhalation Dose = Cair x DBR x A x (EF/365) x 10-6
Where: Cair = concentration in air (μg/m3)
DBR = daily breathing rate (L/kg body weight-day)
A = Inhalation absorption factor
EF = Exposure frequency (days/year)
10-6 = Conversion factor
Cancer Potency Factors (mg/kg-day)-1
CPF

TOG DPM
Year (years) Age
0 0.25 -0.25 - 0* 10 0.0001 0.0157 0.0173 0.002 0.001 0.0001 0.00 Hazard
Index
Fugitive
PM2.5
Total
PM2.5
1 1 0 - 1 10 0.0001 0.0157 0.0173 0.020 0.015 0.0010 0.04 0.0000 0.01 0.02 2 1 1 - 2 10 0.0001 0.0157 0.0173 0.020 0.015 0.0010 0.04 3 1 2 - 3 3 0.0001 0.0157 0.0173 0.003 0.002 0.0002 0.01 4 1 3 - 4 3 0.0001 0.0157 0.0173 0.003 0.002 0.0002 0.01 5 1 4 - 5 3 0.0001 0.0157 0.0173 0.003 0.002 0.0002 0.01 6 1 5 - 6 3 0.0001 0.0157 0.0173 0.003 0.002 0.0002 0.01 7 1 6 - 7 3 0.0001 0.0157 0.0173 0.003 0.002 0.0002 0.01 8 1 7 - 8 3 0.0001 0.0157 0.0173 0.003 0.002 0.0002 0.01 9 1 8 - 9 3 0.0001 0.0157 0.0173 0.003 0.002 0.0002 0.01 10 1 9 - 10 3 0.0001 0.0157 0.0173 0.003 0.002 0.0002 0.01 11 1 10 - 11 3 0.0001 0.0157 0.0173 0.003 0.002 0.0002 0.01 12 1 11 - 12 3 0.0001 0.0157 0.0173 0.003 0.002 0.0002 0.01 13 1 12 - 13 3 0.0001 0.0157 0.0173 0.003 0.002 0.0002 0.01 14 1 13 - 14 3 0.0001 0.0157 0.0173 0.003 0.002 0.0002 0.01 15 1 14 - 15 3 0.0001 0.0157 0.0173 0.003 0.002 0.0002 0.01 16 1 15 - 16 3 0.0001 0.0157 0.0173 0.003 0.002 0.0002 0.01 17 1 16-17 1 0.0001 0.0157 0.0173 0.000 0.000 0.0000 0.00 18 1 17-18 1 0.0001 0.0157 0.0173 0.000 0.000 0.0000 0.00 19 1 18-19 1 0.0001 0.0157 0.0173 0.000 0.000 0.0000 0.00 20 1 19-20 1 0.0001 0.0157 0.0173 0.000 0.000 0.0000 0.00 21 1 20-21 1 0.0001 0.0157 0.0173 0.000 0.000 0.0000 0.00 22 1 21-22 1 0.0001 0.0157 0.0173 0.000 0.000 0.0000 0.00 23 1 22-23 1 0.0001 0.0157 0.0173 0.000 0.000 0.0000 0.00 24 1 23-24 1 0.0001 0.0157 0.0173 0.000 0.000 0.0000 0.00 25 1 24-25 1 0.0001 0.0157 0.0173 0.000 0.000 0.0000 0.00 26 1 25-26 1 0.0001 0.0157 0.0173 0.000 0.000 0.0000 0.00 27 1 26-27 1 0.0001 0.0157 0.0173 0.000 0.000 0.0000 0.00 28 1 27-28 1 0.0001 0.0157 0.0173 0.000 0.000 0.0000 0.00 29 1 28-29 1 0.0001 0.0157 0.0173 0.000 0.000 0.0000 0.00 30 1 29-30 1 0.0001 0.0157 0.0173 0.000 0.000 0.0000 0.00 Total Increased Cancer Risk 0.09 0.067 0.004 0.16
* Third trimester of pregnancy
TAC
DPM
Maximum - Exposure Information Concentration (ug/m3) Cancer Risk (per million) 2034
Maximum
2025
2025
2026
2027
2028
TOTAL
Year
Age
Sensitivity
Factor
Exhaust
TOG
Evaporative
TOG
2029
2030
2031
2032
2033
2046
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2053
2054
2047
2048
2049
2050
2051
2052

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Project Trips - Dubuque Ave
DPM Modeling - Roadway Links, Traffic Volumes, and DPM Emissions Year = 2028
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
DPM_NB_DUB
Dubuque Avenue
Northbound NB 1 773.1 0.48 9.7 31.7 3.4 30 2,818
DPM_SB_DUB
Dubuque Avenue
Southbound SB 1 767.5 0.48 9.7 31.7 3.4 30 2,818
Total 5,635
Emission Factors
Speed Category 1 234
Travel Speed (mph) 30
Emissions per Vehicle (g/VMT) 0.00022
Emisson Factors from CT-EMFAC2017
2028 Hourly Traffic Volumes and DPM Emissions - DPM_NB_DUB Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 4.02% 113 3.25E-06 9 6.62% 187 5.35E-06 17 6.46% 182 5.22E-06 2 3.38% 95 2.73E-06 10 8.04% 226 6.50E-06 18 3.89% 110 3.14E-06 3 2.57% 72 2.08E-06 11 6.11% 172 4.94E-06 19 2.28% 64 1.85E-06 4 0.96% 27 7.80E-07 12 7.59% 214 6.13E-06 20 0.96% 27 7.80E-07 5 0.96% 27 7.80E-07 13 7.11% 200 5.74E-06 21 2.89% 82 2.34E-06 6 2.25% 63 1.82E-06 14 6.62% 187 5.35E-06 22 4.82% 136 3.90E-06 7 4.50% 127 3.64E-06 15 6.14% 173 4.96E-06 23 3.54% 100 2.86E-06 8 3.25% 92 2.63E-06 16 4.21% 119 3.40E-06 24 0.80% 23 6.50E-07 Total 2,818
2028 Hourly Traffic Volumes Per Direction and DPM Emissions - DPM_SB_DUB Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 4.02% 113 3.23E-06 9 6.62% 187 5.32E-06 17 6.46% 182 5.19E-06 2 3.38% 95 2.71E-06 10 8.04% 226 6.45E-06 18 3.89% 110 3.12E-06 3 2.57% 72 2.06E-06 11 6.11% 172 4.90E-06 19 2.28% 64 1.83E-06 4 0.96% 27 7.74E-07 12 7.59% 214 6.09E-06 20 0.96% 27 7.74E-07 5 0.96% 27 7.74E-07 13 7.11% 200 5.70E-06 21 2.89% 82 2.32E-06 6 2.25% 63 1.81E-06 14 6.62% 187 5.32E-06 22 4.82% 136 3.87E-06 7 4.50% 127 3.61E-06 15 6.14% 173 4.93E-06 23 3.54% 100 2.84E-06 8 3.25% 92 2.61E-06 16 4.21% 119 3.38E-06 24 0.80% 23 6.45E-07 Total 2,818

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Project Trips - Dubuque Ave
PM2.5 Modeling - Roadway Links, Traffic Volumes, and PM2.5 Emissions Year = 2028
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
PM2.5_NB_DUB
Dubuque Avenue
Northbound NB 1 773.1 0.48 9.7 32 1.3 30 2,818
PM2.5_SB_DUB
Dubuque Avenue
Southbound SB 1 767.5 0.48 9.7 32 1.3 30 2,818
Total 5,635
Emission Factors - PM2.5
Speed Category 1 234
Travel Speed (mph) 30
Emissions per Vehicle (g/VMT) 0.001299
Emisson Factors from CT-EMFAC2017
2028 Hourly Traffic Volumes and PM2.5 Emissions - PM2.5_NB_DUB Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.12% 31 5.46E-06 9 7.12% 201 3.48E-05 17 7.43% 209 3.63E-05 2 0.41% 12 2.02E-06 10 4.37% 123 2.14E-05 18 8.23% 232 4.02E-05 3 0.37% 10 1.82E-06 11 4.65% 131 2.27E-05 19 5.74% 162 2.80E-05 4 0.18% 5 8.70E-07 12 5.89% 166 2.88E-05 20 4.31% 121 2.10E-05 5 0.46% 13 2.24E-06 13 6.16% 174 3.01E-05 21 3.25% 92 1.59E-05 6 0.85% 24 4.13E-06 14 6.05% 170 2.95E-05 22 3.31% 93 1.62E-05 7 3.73% 105 1.82E-05 15 7.06% 199 3.45E-05 23 2.48% 70 1.21E-05 8 7.76% 219 3.79E-05 16 7.19% 202 3.51E-05 24 1.88% 53 9.16E-06 Total 2,818
2028 Hourly Traffic Volumes Per Direction and PM2.5 Emissions - PM2.5_SB_DUB Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.12% 31 5.42E-06 9 7.12% 201 3.45E-05 17 7.43% 209 3.60E-05 2 0.41% 12 2.00E-06 10 4.37% 123 2.12E-05 18 8.23% 232 3.99E-05 3 0.37% 10 1.81E-06 11 4.65% 131 2.25E-05 19 5.74% 162 2.78E-05 4 0.18% 5 8.64E-07 12 5.89% 166 2.86E-05 20 4.31% 121 2.09E-05 5 0.46% 13 2.22E-06 13 6.16% 174 2.99E-05 21 3.25% 92 1.58E-05 6 0.85% 24 4.10E-06 14 6.05% 170 2.93E-05 22 3.31% 93 1.61E-05 7 3.73% 105 1.81E-05 15 7.06% 199 3.42E-05 23 2.48% 70 1.20E-05 8 7.76% 219 3.76E-05 16 7.19% 202 3.48E-05 24 1.88% 53 9.09E-06 Total 2,818
800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Project Trips - Dubuque Ave
TOG Exhaust Modeling - Roadway Links, Traffic Volumes, and TOG Exhaust Emissions Year = 2028
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
TEXH_NB_DUB
Dubuque Avenue
Northbound NB 1 773.1 0.48 9.7 32 1.3 30 2,818
TEXH_SB_DUB
Dubuque Avenue
Southbound SB 1 767.5 0.48 9.7 32 1.3 30 2,818
Total 5,635
Emission Factors - TOG Exhaust
Speed Category 1 234
Travel Speed (mph) 30
Emissions per Vehicle (g/VMT) 0.03916
Emisson Factors from CT-EMFAC2017
2028 Hourly Traffic Volumes and TOG Exhaust Emissions - TEXH_NB_DUB Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.12% 31 1.65E-04 9 7.12% 201 1.05E-03 17 7.43% 209 1.09E-03 2 0.41% 12 6.08E-05 10 4.37% 123 6.44E-04 18 8.23% 232 1.21E-03 3 0.37% 10 5.49E-05 11 4.65% 131 6.84E-04 19 5.74% 162 8.44E-04 4 0.18% 5 2.62E-05 12 5.89% 166 8.68E-04 20 4.31% 121 6.34E-04 5 0.46% 13 6.74E-05 13 6.16% 174 9.07E-04 21 3.25% 92 4.79E-04 6 0.85% 24 1.25E-04 14 6.05% 170 8.90E-04 22 3.31% 93 4.88E-04 7 3.73% 105 5.49E-04 15 7.06% 199 1.04E-03 23 2.48% 70 3.66E-04 8 7.76% 219 1.14E-03 16 7.19% 202 1.06E-03 24 1.88% 53 2.76E-04 Total 2,818
2028 Hourly Traffic Volumes Per Direction and TOG Exhaust Emissions - TEXH_SB_DUB Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.12% 31 1.63E-04 9 7.12% 201 1.04E-03 17 7.43% 209 1.09E-03 2 0.41% 12 6.04E-05 10 4.37% 123 6.39E-04 18 8.23% 232 1.20E-03 3 0.37% 10 5.45E-05 11 4.65% 131 6.80E-04 19 5.74% 162 8.38E-04 4 0.18% 5 2.60E-05 12 5.89% 166 8.61E-04 20 4.31% 121 6.29E-04 5 0.46% 13 6.69E-05 13 6.16% 174 9.01E-04 21 3.25% 92 4.75E-04 6 0.85% 24 1.24E-04 14 6.05% 170 8.84E-04 22 3.31% 93 4.84E-04 7 3.73% 105 5.45E-04 15 7.06% 199 1.03E-03 23 2.48% 70 3.63E-04 8 7.76% 219 1.13E-03 16 7.19% 202 1.05E-03 24 1.88% 53 2.74E-04 Total 2,818
800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Project Trips - Dubuque Ave
TOG Evaporative Emissions Modeling - Roadway Links, Traffic Volumes, and TOG Evaporative Emissions Year = 2028
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
TEVAP_NB_DUB
Dubuque Avenue
Northbound NB 1 773.1 0.48 9.7 32 1.3 30 2,818
TEVAP_SB_DUB
Dubuque Avenue
Southbound SB 1 767.5 0.48 9.7 32 1.3 30 2,818
Total 5,635
Emission Factors - PM2.5 - Evaporative TOG
Speed Category 1 234
Travel Speed (mph) 30
Emissions per Vehicle per Hour (g/hour) 1.01325
Emissions per Vehicle per Mile (g/VMT) 0.03377
Emisson Factors from CT-EMFAC2017
2028 Hourly Traffic Volumes and TOG Evaporative Emissions - TEVAP_NB_DUB Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.12% 31 1.42E-04 9 7.12% 201 9.04E-04 17 7.43% 209 9.44E-04 2 0.41% 12 5.25E-05 10 4.37% 123 5.55E-04 18 8.23% 232 1.05E-03 3 0.37% 10 4.73E-05 11 4.65% 131 5.90E-04 19 5.74% 162 7.28E-04 4 0.18% 5 2.26E-05 12 5.89% 166 7.48E-04 20 4.31% 121 5.47E-04 5 0.46% 13 5.81E-05 13 6.16% 174 7.83E-04 21 3.25% 92 4.13E-04 6 0.85% 24 1.07E-04 14 6.05% 170 7.68E-04 22 3.31% 93 4.21E-04 7 3.73% 105 4.74E-04 15 7.06% 199 8.96E-04 23 2.48% 70 3.15E-04 8 7.76% 219 9.86E-04 16 7.19% 202 9.12E-04 24 1.88% 53 2.38E-04 Total 2,818
2028 Hourly Traffic Volumes Per Direction and TOG Evaporative Emissions - TEVAP_SB_DUB Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.12% 31 1.41E-04 9 7.12% 201 8.98E-04 17 7.43% 209 9.37E-04 2 0.41% 12 5.21E-05 10 4.37% 123 5.51E-04 18 8.23% 232 1.04E-03 3 0.37% 10 4.70E-05 11 4.65% 131 5.86E-04 19 5.74% 162 7.23E-04 4 0.18% 5 2.25E-05 12 5.89% 166 7.43E-04 20 4.31% 121 5.43E-04 5 0.46% 13 5.77E-05 13 6.16% 174 7.77E-04 21 3.25% 92 4.10E-04 6 0.85% 24 1.07E-04 14 6.05% 170 7.62E-04 22 3.31% 93 4.18E-04 7 3.73% 105 4.70E-04 15 7.06% 199 8.89E-04 23 2.48% 70 3.13E-04 8 7.76% 219 9.79E-04 16 7.19% 202 9.06E-04 24 1.88% 53 2.36E-04 Total 2,818

800 Dubuque Ave, South San Francisco, CA - Off-Site Residential Project Trips - Dubuque Ave
Fugitive Road PM2.5 Modeling - Roadway Links, Traffic Volumes, and Fugitive Road PM2.5 Emissions Year = 2028
Road Link Description Direction
No.

Lanes
Link
Length
(m)
Link
Length
(mi)
Link
Width
(m)
Link
Width
(ft)
Release
Height
( m)
Average
Speed
(mph)
Average
Vehicles
per Day
FUG_NB_DUB
Dubuque Avenue
Northbound NB 1 773.1 0.48 9.7 32 1.3 30 2,818
FUG_SB_DUB
Dubuque Avenue
Southbound SB 1 767.5 0.48 9.7 32 1.3 30 2,818
Total 5,635
Emission Factors - Fugitive PM2.5
Speed Category 1 234
Travel Speed (mph) 30
Tire Wear - Emissions per Vehicle (g/VMT) 0.00204
Brake Wear - Emissions per Vehicle (g/VMT) 0.01682
Road Dust - Emissions per Vehicle (g/VMT) 0.01506
otal Fugitive PM2.5 - Emissions per Vehicle (g/VMT) 0.03393 Emisson Factors from CT-EMFAC2017
2028 Hourly Traffic Volumes and Fugitive PM2.5 Emissions - FUG_NB_DUB Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s Hour
% Per
Hour VPH g/s
1 1.12% 31 1.43E-04 9 7.12% 201 9.08E-04 17 7.43% 209 9.48E-04 2 0.41% 12 5.27E-05 10 4.37% 123 5.58E-04 18 8.23% 232 1.05E-03 3 0.37% 10 4.75E-05 11 4.65% 131 5.93E-04 19 5.74% 162 7.32E-04 4 0.18% 5 2.27E-05 12 5.89% 166 7.52E-04 20 4.31% 121 5.49E-04 5 0.46% 13 5.84E-05 13 6.16% 174 7.86E-04 21 3.25% 92 4.15E-04 6 0.85% 24 1.08E-04 14 6.05% 170 7.71E-04 22 3.31% 93 4.23E-04 7 3.73% 105 4.76E-04 15 7.06% 199 9.00E-04 23 2.48% 70 3.17E-04 8 7.76% 219 9.90E-04 16 7.19% 202 9.16E-04 24 1.88% 53 2.39E-04 Total 2,818
2028 Hourly Traffic Volumes Per Direction and Fugitive PM2.5 Emissions - FUG_SB_DUB Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile Hour
% Per
Hour VPH g/mile
1 1.12% 31 1.42E-04 9 7.12% 201 9.02E-04 17 7.43% 209 9.41E-04 2 0.41% 12 5.23E-05 10 4.37% 123 5.54E-04 18 8.23% 232 1.04E-03 3 0.37% 10 4.72E-05 11 4.65% 131 5.89E-04 19 5.74% 162 7.26E-04 4 0.18% 5 2.26E-05 12 5.89% 166 7.46E-04 20 4.31% 121 5.45E-04 5 0.46% 13 5.80E-05 13 6.16% 174 7.81E-04 21 3.25% 92 4.12E-04 6 0.85% 24 1.07E-04 14 6.05% 170 7.66E-04 22 3.31% 93 4.20E-04 7 3.73% 105 4.72E-04 15 7.06% 199 8.93E-04 23 2.48% 70 3.14E-04 8 7.76% 219 9.83E-04 16 7.19% 202 9.10E-04 24 1.88% 53 2.37E-04 Total 2,818

800 Dubuque Ave, South San Francisco, CA - Dubuque Avenue Traffic - TACs & PM2.5 - Project Trips AERMOD Risk Modeling Parameters and Maximum Concentrations at Construction Residential MEI Receptors (1 Location - 1 meter receptor height) Emission Year 2023
Receptor Information Construction School MEI receptor
Number of Receptors 1
Receptor Height 1.5 Meters
Receptor Distances At School MEI location
Meteorological Conditions
BAAQMD San Francisco International Airport M 2013-2017
Land Use Classification Urban
Wind Speed Variable
Wind Direction Variable
Construction School MEI Cancer Risk Maximum Concentrations Meteorological
Data Years DPM Exhaust TOG Evaporative TOG
2013-2017 0.0000 0.0051 0.0044
Construction School MEI PM2.5 Maximum Concentrations
Meteorological
Data Years Total PM2.5 Fugitive PM2.5 Vehicle PM2.5
2013-2017 0.0046 0.0045 0.0002
Concentration (μg/m3)*
PM2.5 Concentration (μg/m3)*
800 Dubuque Avenue, South San Francisco, CA - Dubuque Avenue Traffic Cancer Risk - Project Trips Impacts at Construction School MEI - 1 meter receptor height 30 Year Residential Exposure
Cancer Risk Calculation Method
Cancer Risk (per million) =CPF x Inhalation Dose x ASF x ED/AT x FAH x 1.0E6 Where: CPF = Cancer potency factor (mg/kg-day)-1
ASF = Age sensitivity factor for specified age group
ED = Exposure duration (years)
AT = Averaging time for lifetime cancer risk (years)
FAH = Fraction of time spent at home (unitless)
Inhalation Dose = Cair x DBR x A x (EF/365) x 10-6
Where: Cair = concentration in air (μg/m3)
DBR = daily breathing rate (L/kg body weight-day)
A = Inhalation absorption factor
EF = Exposure frequency (days/year)
10-6 = Conversion factor
Cancer Potency Factors (mg/kg-day)-1
CPF

TOG DPM
Year (years) Age
0 0.25 -0.25 - 0* 10 0.0000 0.0051 0.0044 0.000 0.000 0.0000 0.00 Hazard
Index
Fugitive
PM2.5
Total
PM2.5
1 1 0 - 1 10 0.0000 0.0051 0.0044 0.005 0.005 0.0002 0.01 0.0000 0.00 0.00 2 1 1 - 2 10 0.0000 0.0051 0.0044 0.005 0.005 0.0002 0.01 3 1 2 - 3 3 0.0000 0.0051 0.0044 0.001 0.001 0.0000 0.00 4 1 3 - 4 3 0.0000 0.0051 0.0044 0.001 0.001 0.0000 0.00 5 1 4 - 5 3 0.0000 0.0051 0.0044 0.001 0.001 0.0000 0.00 6 1 5 - 6 3 0.0000 0.0051 0.0044 0.001 0.001 0.0000 0.00 7 1 6 - 7 3 0.0000 0.0051 0.0044 0.001 0.001 0.0000 0.00 8 1 7 - 8 3 0.0000 0.0051 0.0044 0.001 0.001 0.0000 0.00 9 1 8 - 9 3 0.0000 0.0051 0.0044 0.001 0.001 0.0000 0.00 10 1 9 - 10 3 0.0000 0.0051 0.0044 0.001 0.001 0.0000 0.00 11 1 10 - 11 3 0.0000 0.0051 0.0044 0.001 0.001 0.0000 0.00 12 1 11 - 12 3 0.0000 0.0051 0.0044 0.001 0.001 0.0000 0.00 13 1 12 - 13 3 0.0000 0.0051 0.0044 0.001 0.001 0.0000 0.00 14 1 13 - 14 3 0.0000 0.0051 0.0044 0.001 0.001 0.0000 0.00 15 1 14 - 15 3 0.0000 0.0051 0.0044 0.001 0.001 0.0000 0.00 16 1 15 - 16 3 0.0000 0.0051 0.0044 0.001 0.001 0.0000 0.00 17 1 16-17 1 0.0000 0.0051 0.0044 0.000 0.000 0.0000 0.00 18 1 17-18 1 0.0000 0.0051 0.0044 0.000 0.000 0.0000 0.00 19 1 18-19 1 0.0000 0.0051 0.0044 0.000 0.000 0.0000 0.00 20 1 19-20 1 0.0000 0.0051 0.0044 0.000 0.000 0.0000 0.00 21 1 20-21 1 0.0000 0.0051 0.0044 0.000 0.000 0.0000 0.00 22 1 21-22 1 0.0000 0.0051 0.0044 0.000 0.000 0.0000 0.00 23 1 22-23 1 0.0000 0.0051 0.0044 0.000 0.000 0.0000 0.00 24 1 23-24 1 0.0000 0.0051 0.0044 0.000 0.000 0.0000 0.00 25 1 24-25 1 0.0000 0.0051 0.0044 0.000 0.000 0.0000 0.00 26 1 25-26 1 0.0000 0.0051 0.0044 0.000 0.000 0.0000 0.00 27 1 26-27 1 0.0000 0.0051 0.0044 0.000 0.000 0.0000 0.00 28 1 27-28 1 0.0000 0.0051 0.0044 0.000 0.000 0.0000 0.00 29 1 28-29 1 0.0000 0.0051 0.0044 0.000 0.000 0.0000 0.00 30 1 29-30 1 0.0000 0.0051 0.0044 0.000 0.000 0.0000 0.00 Total Increased Cancer Risk 0.02 0.022 0.001 0.05
* Third trimester of pregnancy
2029
2030
2031
2032
TAC
DPM
Maximum - Exposure Information
2028
Maximum
2025
2025
2026
2027
TOTAL
Year
Age
Sensitivity
Factor
Exhaust
TOG
Evaporative
TOG
Concentration (ug/m3) Cancer Risk (per million)
2033
2046
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2034
2053
2054
2047
2048
2049
2050
2051
2052
Rail Line Emissions
800 Dubuque Ave - South San Francisco
DPM Modeling - Rail Line Information and DPM Emission Rates Caltrain Electrification and Diesel-Powered Freight
DPM Emission Rates
Year Description
Modeled
No. Lines
Link
Width
(ft)
Link
Width
(m)
Link
Length
(ft)
Link
Length
(miles)
Link
Length
(m)
Release
Height
(m)
No.

Trains
per Day
Train
Travel
Speed
(mph)
Average Daily
Emission Rate
(g/mi/day)
Average Daily
Emission Rate
(g/day)
Link
Emission
Rate
(g/s)
Link
Emission
Rate
(lb/hr)
2023-2024 Caltrain 1 15 4.6 2,422 0.46 738 5.0 83 40 186.3 85.5 9.89E-04 7.85E-03 Freight Trains 1 15 4.6 2,422 0.46 738 5.0 4 40 16.7 7.7 8.88E-05 7.05E-04 Total - - - 2,935 0.56 894 - 87 - 203.0 93.1 1.08E-03 8.56E-03 2025-2027 Caltrain 1 15 4.6 2,422 0.46 738 5.0 18 40 33.2 15.2 1.76E-04 1.40E-03 Freight Trains 1 15 4.6 2,422 0.46 738 5.0 4 40 13.9 6.4 7.40E-05 5.87E-04 Total - - - 2,935 0.56 894 - 22 - 47.2 21.6 2.50E-04 1.99E-03 Notes: Emission based on Emission Factors for Locomotives, USEPA 2009 (EPA-420-F-09-025) Average emissions calculated for periods 2023-2024 and 2025-2027.

Fuel correction factors from Offroad Modeling Change Technical memo, Changes to the Locomotive Inventory, CARB July 2006.

PM2.5 calculated as 92% of PM emissions (CARB CEIDERS PM2.5 fractions) Passenger trains assumed to operate for
Freight trains assumed to operate for
Caltrain
Passenger Trains
Passenger trains - weekday =
Passenger trains - weekend =
Passenger trains - Sat only =
Total Trains =
Annual average daily trains =
Locomotive horsepower =
Locomotives per train =
Engine load =
Freight
Freight trains per day = 4 7 days/week
Locomotive horsepower = 2300
Locomotives per train = 2
Total horsepower = 4600
Locomotive engine load = 0.5
DPM Locomotive Emission Factors (g/hp-hr)
Train Type
2023-
2024
2025-
2027
Passenger 0.077 0.059
Freight 0.087 0.072
2025+ emissions are average for 2025-2054.

PM2.5 to PM ratio = 1
CARB Fuel Adj Factor
2010 2011+
Passenger 0.717 0.709
Freight 0.851 0.840
Diesel Trains

0.5 24
4 0
28 18
3467
1 0.5
136
83 3285
1 Diesel Trains
104
32 0
24 hours per day
24 hours per day
2023-2024
(Existing)
2025-2027 (with
Electrification)
Rail Line Impacts at Project Construction MEI
800 Dubuque Ave, South San Francisco, CA - Rail Impacts at Construction MEI Receptor Maximum DPM Cancer Risk and PM2.5 Calculations For Rail Operation at MEI Impacts at Gateway Child Development Center YMCA - 1 meter - Infant Exposure Student Cancer Risk (per million) = CPF x Inhalation Dose x ASF x ED/AT x 1.0E6 Where: CPF = Cancer potency factor (mg/kg-day)-1
ASF = Age sensitivity factor for specified age group
ED = Exposure duration (years)
AT = Averaging time for lifetime cancer risk (years)
Inhalation Dose = Cair x SCAF x 8-Hr BR x A x (EF/365) x 10-6 Where: Cair = concentration in air (μg/m3)
SCAF = School Child Adjustment Factor (unitless) for source operation and exposures different than 8 hours/day
= (24/SHR) x (7days/SDay) x (SCHR/8 hrs)
SHR = Hours/day of emission source operation
SDay = Number of days per week of source operation
SCHR = School operation hours while emission source in operation 8-Hr BR = Eight-hour breathing rate (L/kg body weight-per 8 hrs) A = Inhalation absorption factor
EF = Exposure frequency (days/year)
10-6 = Conversion factor
Values
Infant Child
Age --> 0 - <2 2 - <16
Parameter
ASF = 10 3
DPM CPF = 1.10E+00 1.10E+00
8-Hr BR* = 1200 520
SCHR = 9 9
SHR = 24 24
SDay = 7 7
A = 1 1
EF = 250 250
AT = 70 70
SCAF = 1.13 1.13
* 95th percentile 8-hr breathing rates for moderate intensity activities Construction Cancer Risk by Year - Maximum Child Development Center Receptor Child - Exposure Information Child
Exposure Age* Cancer Maximum
Exposure Duration DPM Conc (ug/m3) Sensitivity Risk Hazard Total Year (years) Age Year Annual Factor (per million) Index PM2.5 1 1 0 - 1 2023 0.0148 10 2.15 0.0030 0.015
2 1 1 - 2 2024 0.0148 10 2.15 0.0030 0.015
3 1 2 - 3 2025 0.0034 3 0.06 0.0007 0.003
4 1 3 - 4 2026 0.0034 3 0.06 0.0007 0.003
5 1 4 - 5 2027 0.0034 3 0.06 0.0007 0.003
Total Increased Cancer Risk 4.50
* Children assumed to be 3 months of age with 5 years of exposure to construction emissions Date of Request 6/28/2022
Contact Name Zachary PalmAffiliation Illingworth & Rodkin, Inc.Phone 707‐794‐0400 x117Email [email protected] Name 800 DubuqueAddress 800 Dubuque AveCity South San FranciscoCounty San MateoType (residential, commercial, mixed use, industrial, etc.) Office/R&DProject Size (# of units or building square feet) 900ksqft Table A: Requester Contact Information
Comments:

Risk & Hazard Stationary Source Inquiry FormThis form is required when users request stationary source data from BAAQMDThis form is to be used with the BAAQMD's Google Earth stationary source screening tables.

Click here for guidance on coducting risk & hazard screening, including roadways & freeways, refer to the District's Risk & Hazard Analysis flow chart.

Click here for District's Recommended Methods for Screening and Modeling Local Risks and Hazards document.

For Air District assistance, the following steps must be completed:

1. Complete all the contact and project information requested in . Incomplete forms will not be processed. Please include a project site map.

2. Download and install the free program Google Earth, http://www.google.com/earth/download/ge/, and then download the county specific Google Earth stationary source application files from the District's website, http://www.baaqmd.gov/Divisions/Planning‐and‐Research/CEQA‐GUIDELINES/Tools‐and‐ Methodology.aspx. The small points on the map represent stationary sources permitted by the District (Map A on right). These permitted sources include diesel back‐up generators, gas stations, dry cleaners, boilers, printers, auto spray booths, etc. Click on a point to view the source's Information Table, including the name, location, and preliminary estimated cancer risk, hazard index, and PM2.5 concentration.3. Find the project site in Google Earth by inputting the site's address in the Google Earth search box.4. Identify stationary sources within at least a 1000ft radius of project site. Verify that the location of the source on the map matches with the source's address in the Information Table, by using the Google Earth address search box to confirm the source's address location. Please report any mapping errors to the District.5. List the stationary source information in blue section only.

6. Note that a small percentage of the stationary sources have Health Risk Screening Assessment (HRSA) data INSTEAD of screening level data. These sources will be noted by an asterisk next to the Plant Name (Map B on right). If HRSA values are presented, these values have already been modeled and cannot be adjusted further.7. Email this completed form to District staff. District staff will provide the most recent risk, hazard, and PM2.5 data that are available for the source(s). If this information or data are not available, source emissions data will be provided. Staff will respond to inquiries within three weeks.

Note that a public records request received for the same stationary source information will cancel the processing of your SSIF request.Submit forms, maps, and questions to Areana Flores at 415‐749‐4616, or [email protected] Table A: Requester Contact Information
Table B
Table A
Construction MEIs
Distance from
Receptor (feet) or
MEI1 Plant No. Facility Name Address Cancer Risk2 Hazard Risk2 PM2.52 Source No.3 Type of Source4 Fuel Code5 Status/Comments Distance
Adjustment
Multiplier
Adjusted
Cancer Risk
Estimate
Adjusted
Hazard
Risk
Adjusted
PM2.5
200 16024 Genentech, Inc 611 Gateway Boulevard 1.95 0.00 0.00 Generator 2020 Dataset 0.41 0.80 0.002 0.00150 14010 Boston Properties 601 Gateway Boulevard 6.07 0.00 0.01 Generator 2020 Dataset 0.58 3.52 0.001 0.00950 20236 Biotech Gateway ‐ HCP c/o CBRE 2 Corporate Drive 1.66 0.00 0.00 Generator 2020 Dataset 0.04 0.07 0.000 0.00 850 19179 MacroGenics West,Inc One Corporate Drive 39.61 0.02 0.05 Generator 2020 Dataset 0.06 2.38 0.001 0.00530 17584 Alexandria Real Estate Equities Inc 681 GATEWAY BLVD 17.49 0.01 0.02 Generator 2020 Dataset 0.10 1.75 0.001 0.00 1000+ 18401 Lowe's HIW Inc 720 Dubuque Avenue 9.47 0.00 0.01 Generator 2020 Dataset 0.04 0.38 0.000 0.00 1000+ 23311 Health Plan of San Mateo 801 Gateway Boulevard 1.49 0.00 0.00 Generator 2020 Dataset 0.04 0.06 0.000 0.00320 24794 611 Gateway Center LP 611 Gateway Boulevard 2.44 0.01 0.43 No Data 2020 Dataset 0.51 1.23 0.003 0.22630 24795 601 & 651 Gateway Center LP 651 Gateway Boulevard 20.25 0.03 0.33 No Data 2020 Dataset 0.27 5.49 0.009 0.091000+ 111170_1 Airport Boulevard Shell 899 Airport Blvd 19.36 0.09 0.00 Gas Dispensing Facility 2020 Dataset 0.02 0.29 0.001 0.00 Footnotes:

1. Maximally exposed individual
c. BAAQMD Reg 11 Rule 16 required that all co‐residential (sharing a wall, floor, ceiling or is in the same building as a residential unit) dry cleaners cease use of perc on July 1, 2010.

Date last updated: 03/13/2018
g. This spray booth is considered to be insignificant.

4. Permitted sources include diesel back‐up generators, gas stations, dry cleaners, boilers, printers, auto spray booths, etc.11. Further information about common sources:
a. Sources that only include diesel internal combustion engines can be adjusted using the BAAQMD's Diesel Multiplier worksheet. b. The risk from natural gas boilers used for space heating when <25 MM BTU/hr would have an estimated cancer risk of one in a million or less, and a chronic hazard index of Therefore, there is no cancer risk, hazard or PM2.5 concentrations from co‐residential dry cleaning businesses in the BAAQMD. d. Non co‐residential dry cleaners must phase out use of perc by Jan. 1, 2023. Therefore, the risk from these dry cleaners does not need to be factored in over a 70‐year period, but instead should reflect the number of years perc use will continue after the project's residents or other sensitive receptors (such as students, patients, etc) take occupancy. e. Gas stations can be adjusted using BAAQMD's Gas Station Distance Mulitplier worksheet.

6. If a Health Risk Screening Assessment (HRSA) was completed for the source, the application number will be listed here.7. The date that the HRSA was completed.8. Engineer who completed the HRSA. For District purposes only.9. All HRSA completed before 1/5/2010 need to be multiplied by an age sensitivity factor of 1.7.10. The HRSA "Chronic Health" number represents the Hazard Index.5. Fuel codes: 98 = diesel, 189 = Natural Gas.2. These Cancer Risk, Hazard Index, and PM2.5 columns represent the values in the Google Earth Plant Information Table.3. Each plant may have multiple permits and sources. f. Unless otherwise noted, exempt sources are considered insignificant. See BAAQMD Reg 2 Rule 1 for a list of exempt sources.

Table B: Google Earth data

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CULTURAL RECORDS SEARCH, NATIVE AMERICAN HERITAGE

COMMISSION RESPONSE

ATTACHMENT B
to the
800 Dubuque Avenue Project Initial Study / Mitigated Negative Declaration July 26, 2022 NWIC File No.: 22-0094
Jenna Sunderlin
Lamphier-Gregory, Inc.
4100 Redwood Road, STE 20A - #601
Oakland, CA 94619
Re: Record search results for the proposed 800 Dubuque Avenue Project in the City of South San Francisco
Dear Jenna Sunderlin:

Per your request received by our office on the 18th of July, 2022, a rapid response records search was conducted for the above referenced project by reviewing pertinent Northwest Information Center (NWIC) base maps that reference cultural resources records and reports, historic-period maps, and literature for Alameda County. Please note that use of the term cultural resources includes both archaeological resources and historical buildings and/or structures.

The project proposes to demolish all existing improvements and construct approximately 900,000 square feet of office/R&D space in 3 new buildings, including accessory event center, food/beverage, and fitness center uses. The project will involve excavation for subsurface parking across the majority of the site extending to depths of approximately 48 feet below ground surface.

Review of the information at our office indicates that there has been five cultural resource studies that cover up to approximately 100% of the 800 Dubuque Avenue project area. One study by Cartier (1984: S-6529) covered up to 100% of the project area with field survey and testing. Jurich et al (2011: S-48738) included 100% of the project area within its Research Area only, and the other three studies were larger adjacent studies that included up to 10% of the current project area; Hatoff et al 1995: S-17993, Carrico et al 2000: S-26045, and Nelson et al 2002: S-29657. See enclosed Report List.

This 800 Dubuque Avenue project area contains no recorded archaeological resources. The State Office of Historic Preservation Built Environment Resources Directory (OHP BERD), which includes listings of the California Register of Historical Resources, California State Historical Landmarks, California State Points of Historical Interest, and the National Register of Historic Places, lists no recorded buildings or structures within or adjacent to the proposed 800 2 22‐0094
Dubuque Avenue project area. In addition to these inventories, the NWIC base maps show no recorded buildings or structures within the proposed 800 Dubuque Avenue project area.

At the time of Euroamerican contact, the Native Americans that lived in the area were speakers of the Ramaytush language, which is part of the Costanoan/Ohlone language family (Levy 1978:485). There is one Native American resource within or adjacent to the proposed 800 Dubuque Avenue project area that are referenced in the ethnographic literature [village of Sipliskin (Levy 1978: 485, Milliken 1995, Nelson 1909)].

Based on an evaluation of the environmental setting and features associated with known sites, Native American resources in this part of San Mateo County have been found in areas marginal to San Francisco Bay and inland on ridges, midslope benches, in valleys, near intermittent and perennial watercourses and near areas populated by oak, buckeye, manzanita, and pine, as well as near a variety of plant and animal resources. The 800 Dubuque Avenue project area is located at the western end of Point San Bruno, at a low point between San Bruno Mountain and the westernmost hill of Point San Bruno. The project area is located approximately 140 meters from the historic San Francisco bayshore margins and associated marshlands, and adjacent to a former creek. Aerial maps indicate a fully paved over parcel with buildings. Given the similarity of these environmental factors and the archaeological and ethnographic sensitivity of the area, there is a moderately high potential for unrecorded Native American resources to be within the proposed 800 Dubuque Avenue project area.

Review of historical literature and maps indicated historic-period activity within the 800 Dubuque Avenue project area. Early San Mateo County maps indicated the project area was located within the landholdings of the South San Francisco Land & Improvement Co, and adjacent to a portion of the Southern Pacific Railroad. As there are no buildings indicated on the maps at that time, it is unclear if the area was developed at that time. With this information in mind, there is a moderate potential for unrecorded historic-period archaeological resources to be within the proposed 800 Dubuque Avenue project area.

The 1956 San Francisco South USGS 7.5-minute topographic quadrangle depicts one building and a railroad spur within the 800 Dubuque Avenue project area. If present, these unrecorded building and structure meet the Office of Historic Preservation’s minimum age standard that buildings, structures, and objects 45 years or older may be of historical value.

RECOMMENDATIONS:
1) There is a moderately high potential for Native American archaeological resources and a moderate potential for historic-period archaeological resources to be within the project area. Due to the passage of time since the previous study that included approximately 100% of the project area (Cartier 1984), and the changes in archaeological theory and method since that time, we recommend a qualified archaeologist conduct further archival and field study for the entire project area to identify archaeological resources.

Our usual recommendation would include archival research and a field examination.

The proposed project area, however, has been highly developed and is presently covered with asphalt, buildings, or fill that obscures the visibility of original surface soils, which negates the feasibility of an adequate surface inspection.
3 22‐0094
Field study may include, but is not limited to, hand auger sampling, shovel test units, or geoarchaeological analyses as well as other common methods used to identify the presence of buried archaeological resources. Please refer to the list of consultants who meet the Secretary of Interior’s Standards at http://www.chrisinfo.org.
2) We recommend the lead agency contact the local Native American tribe(s) regarding traditional, cultural, and religious heritage values. For a complete listing of tribes in the vicinity of the project, please contact the Native American Heritage Commission at 916/373-3710. 3) If the proposed project area contains buildings or structures that meet the minimum age requirement, prior to commencement of project activities, it is recommended that this resource be assessed by a professional familiar with the architecture and history of San Mateo County. Please refer to the list of consultants who meet the Secretary of Interior’s Standards at http://www.chrisinfo.org.
4) Review for possible historic-period buildings or structures has included only those sources listed in the attached bibliography and should not be considered comprehensive. 5) If archaeological resources are encountered during construction, work should be temporarily halted in the vicinity of the discovered materials and workers should avoid altering the materials and their context until a qualified professional archaeologist has evaluated the situation and provided appropriate recommendations. Project personnel should not collect cultural resources. Native American resources include chert or obsidian flakes, projectile points, mortars, and pestles; and dark friable soil containing shell and bone dietary debris, heataffected rock, or human burials. Historic-period resources include stone or adobe foundations or walls; structures and remains with square nails; and refuse deposits or bottle dumps, often located in old wells or privies.
6) It is recommended that any identified cultural resources be recorded on DPR 523 historic resource recordation forms, available online from the Office of Historic Preservation’s website: https://ohp.parks.ca.gov/?page_id=28351
Due to processing delays and other factors, not all of the historical resource reports and resource records that have been submitted to the Office of Historic Preservation are available via this records search. Additional information may be available through the federal, state, and local agencies that produced or paid for historical resource management work in the search area. Additionally, Native American tribes have historical resource information not in the California Historical Resources Information System (CHRIS) Inventory, and you should contact 4 22‐0094
the California Native American Heritage Commission for information on local/regional tribal contacts.

The California Office of Historic Preservation (OHP) contracts with the California Historical Resources Information System’s (CHRIS) regional Information Centers (ICs) to maintain information in the CHRIS inventory and make it available to local, state, and federal agencies, cultural resource professionals, Native American tribes, researchers, and the public.

Recommendations made by IC coordinators or their staff regarding the interpretation and application of this information are advisory only. Such recommendations do not necessarily represent the evaluation or opinion of the State Historic Preservation Officer in carrying out the OHP’s regulatory authority under federal and state law.

Thank you for using our services. Please contact this office if you have any questions, (707) 588-8455.

Sincerely,
Jillian Guldenbrein
Researcher

5 22‐0094

LITERATURE REVIEWED
In addition to archaeological maps and site records on file at the Northwest Information Center of the Historical Resources Information System, the following literature was reviewed:

Barrows, Henry D., and Luther A. Ingersoll
2005 Memorial and Biographical History of the Coast Counties of Central California.

Three Rocks Research, Santa Cruz (Digital Reproduction of The Lewis Publishing Company, Chicago: 1893.)
Bowman, J.N.
1951 Adobe Houses in the San Francisco Bay Region. In Geologic Guidebook of the San Francisco Bay Counties, Bulletin 154. California Division of Mines, Ferry Building, San Francisco, CA.

Brabb, Earl E., Fred A. Taylor, and George P. Miller
1982 Geologic, Scenic, and Historic Points of Interest in San Mateo County, California.

Miscellaneous Investigations Series, Map I-1257-B, 1:62,500. Department of the Interior, United States Geological Survey, Washington, D.C.

Bromfield, Davenport
1894 Official Map of San Mateo County, California
General Land Office
1858, 1864 Survey Plat for Rancho Buri Buri, Township 3 South/Range 5 West.

Heizer, Robert F., editor
1974 Local History Studies, Vol. 18., “The Costanoan Indians.” California History Center, DeAnza College, Cupertino, CA.

Helley, E.J., K.R. Lajoie, W.E. Spangle, and M.L. Blair 1979 Flatland Deposits of the San Francisco Bay Region - Their Geology and Engineering Properties, and Their Importance to Comprehensive Planning.

Geological Survey Professional Paper 943. United States Geological Survey and Department of Housing and Urban Development.

Kroeber, A.L.
1925 Handbook of the Indians of California. Bureau of American Ethnology, Bulletin 78, Smithsonian Institution, Washington, D.C. (Reprint by Dover Publications, Inc., New York, 1976)
Levy, Richard
1978 Costanoan. In California, edited by Robert F. Heizer, pp. 485-495. Handbook of North American Indians, vol. 8, William C. Sturtevant, general editor. Smithsonian Institution, Washington, D.C.

Milliken, Randall
1995 A Time of Little Choice: The Disintegration of Tribal Culture in the San Francisco Bay Area 1769-1810. Ballena Press Anthropological Papers No. 43, Menlo Park, CA.
6 22‐0094
Myers, William A. (editor)
1977 Historic Civil Engineering Landmarks of San Francisco and Northern California.

Prepared by The History and Heritage Committee, San Francisco Section, American Society of Civil Engineers. Pacific Gas and Electric Company, San Francisco, CA.

Nelson, N.C.
1909 Shellmounds of the San Francisco Bay Region. University of California Publications in American Archaeology and Ethnology 7(4):309-356. Berkeley. (Reprint by Kraus Reprint Corporation, New York, 1964)
Nichols, Donald R., and Nancy A. Wright
1971 Preliminary Map of Historic Margins of Marshland, San Francisco Bay, California.

U.S. Geological Survey Open File Map. U.S. Department of the Interior, Geological Survey in cooperation with the U.S. Department of Housing and Urban Development, Washington, D.C.

Postel, Mitchell P.
1994 San Mateo, A Centennial History. Scottwall Associates, San Francisco, CA.

San Mateo County Historic Resources Advisory Board
1984 San Mateo County: Its History and Heritage. Second Edition. Division of Planning and Development Department of Environmental Management.

State of California Department of Parks and Recreation
1976 California Inventory of Historic Resources. State of California Department of Parks and Recreation, Sacramento.

State of California Department of Parks and Recreation and Office of Historic Preservation 1988 Five Views: An Ethnic Sites Survey for California. State of California Department of Parks and Recreation and Office of Historic Preservation, Sacramento.

State of California Office of Historic Preservation **
2021 Built Environment Resources Directory. Listing by City (through September 14-15, 2021). State of California Office of Historic Preservation, Sacramento.

Woodbridge, Sally B.
1988 California Architecture: Historic American Buildings Survey. Chronicle Books, San Francisco, CA.

Works Progress Administration
1984 The WPA Guide to California. Reprint by Pantheon Books, New York. (Originally published as California: A Guide to the Golden State in 1939 by Books, Inc., distributed by Hastings House Publishers, New York.)
**Note that the Office of Historic Preservation’s Historic Properties Directory includes National Register, State Registered Landmarks, California Points of Historical Interest, and the California Register of Historical Resources as well as Certified Local Government surveys that have undergone Section 106 review.

Report List
Report No. Other IDs Year Author(s) Title Affiliation
NWIC File # 22-0094 800 Dubuque Ave, South SF
S-006529 1984 Subsurface Archaeological Testing of the
Dubuque Packing Plant Site on Dubuque
Avenue in the City of South San Francisco,
County of San Mateo
Archaeological Resource
Management
Robert Cartier
S-017993 1995 Cultural Resources Inventory Report for the Proposed Mojave Northward Expansion
Project
Woodward-Clyde
Consultants
Brian Hatoff, Barb Voss,
Sharon Waechter,
Stephen Wee, and
Vance Bente
S-017993a 1995 Proposed Mojave Northward Expansion
Project: Appendix A - Native American
Consultation
Woodward-Clyde
Consultants
S-017993b 1995 Proposed Mojave Northward Expansion
Project: Appendix B - Looping Segments -
Class 1
Woodward-Clyde
Consultants
S-017993c 1995 Proposed Mojave Northward Expansion
Project: Appendix C -Monitoring and
Emergency Discovery Plan
Woodward-Clyde
Consultants
S-017993d 1995 Proposed Mojave Northward Expansion
Project: Appendix D - General Construction
Information
Woodward-Clyde
Consultants
S-017993e 1995 Proposed Mojave Northward Expansion
Project: Appendix E - Archaeological Site
Records
Woodward-Clyde
Consultants

Page 1 of 7 ends

Report List
Report No. Other IDs Year Author(s) Title Affiliation
NWIC File # 22-0094 800 Dubuque Ave, South SF
S-017993f 1995 Proposed Mojave Northward Expansion
Project: Appendix F - Historic Features
Evaluation Forms
Woodward-Clyde
Consultants
S-017993g 1995 Proposed Mojave Northward Expansion
Project: Appendix G - Railroad Crossing
Evaluation Forms
Woodward-Clyde
Consultants
S-017993h 1995 Proposed Mojave Northward Expansion
Project: Appendix H - Crossing Diagrams and
Plan View Maps
Woodward Clyde
Consultants
S-017993I 1995 Proposed Mojave Northward Expansion
Project: Appendix I - Railroad Depot NRHP
Nomination Forms and Related Records
Woodward-Clyde
Consultants
S-017993j 1995 Proposed Mojave Northward Expansion
Project: Appendix J - Looping Segment and
Compressor Station Site Records
Woodward-Clyde
Consultants
S-017993k 1995 Proposed Mojave Northward Expansion
Project: Appendix K - Historic Site Records /
Isolate Forms
Woodward-Clyde
Consultants
S-017993l 1995 Proposed Mojave Northward Expansion
Project: Appendix L - Photodocumentation
Woodward-Clyde
Consultants
S-017993m 1995 Proposed Mojave Northward Expansion
Project: Appendix M - Curricula Vitae of Key
Preparers
Woodward-Clyde
Consultants

Page 2 of 7 ends

Report List
Report No. Other IDs Year Author(s) Title Affiliation
NWIC File # 22-0094 800 Dubuque Ave, South SF
S-026045 2000 Cultural Resources Reconnaissance Survey
and Inventory Report for the Metromedia
Fiberoptic Cable Project, San Francisco Bay
Area and Los Angeles Basin Networks
Richard Carrico, Mooney & Associates
Theodore Cooley, and
William Eckhardt

Page 3 of 7 ends

Report List
Report No. Other IDs Year Author(s) Title Affiliation
NWIC File # 22-0094 800 Dubuque Ave, South SF
S-029657 2002 Archaeological Inventory for the Caltrain Electrification Program Alternative in San
Francisco, San Mateo, and Santa Clara
Counties, California
Far Western
Anthropological Research
Group, Inc.

Wendy J. Nelson,
Tammara Norton, Larry
Chiea, and Reinhard
Pribish

OHP PRN -
FTA021021A;
Voided - S-37863;
Voided - S-42672;
Voided - S-43525
S-029657a 2002 Finding of No Adverse Effect, Caltrain
Electrification Program, San Francisco, San
Mateo, and Santa Clara Counties, California
JRP Historical Consulting
Services
Rand F. Herbert
S-029657b 2002 Historic Property Survey for the Proposed Caltrain Electrification Program, San
Francisco, San Mateo, and Santa Clara
Counties, California
Parsons; JRP Historical
Consulting Services; Far
Western Anthropological
Research Group, Inc.

S-029657c 2002 FTA021021A; Caltrain Electrification
Program, San Francisco, San Mateo, and
Santa Clara Counties
Office of Historic
Preservation
Knox Mellon
S-029657d 2003 Final Finding of Effect Amendment, Caltrain Electrification Project, San Francisco, San
Mateo, and Santa Clara Counties, California
JRP Historical Consulting
Services
Meta Bunse

Page 4 of 7 ends

Report List
Report No. Other IDs Year Author(s) Title Affiliation
NWIC File # 22-0094 800 Dubuque Ave, South SF
S-029657e 2001 Draft Finding of No Adverse Effect, Caltrain Electrification Program, San Francisco, San
Mateo, and Santa Clara Counties, California
JRP Historical Consulting
Services
Rand F. Herbert
S-029657f 2008 Cultural Resources Addendum for the
Caltrain Electrification Program Alternative:

San Francisco, San Mateo, and Santa Clara
Counties, California
Far Western
Anthropological Research
Group, Inc.

Sharon A. Waechter,
Jack Meyer, and Laura
Leach-Palm
S-029657g 2008 Addendum Finding of Effect, Caltrain
Electrification Program, San Francisco to San
Jose (MP 0.0 to 52.0); San Francisco, San
Mateo, and Santa Clara Counties, California
JRP Historical Consulting,
LLC
Meta Bunse
S-029657h 2002 Inventory and Evaluation of Historic
Resources, Caltrain Electrification Program,
San Francisco to Gilroy (MP 0.0 to 77.4)
(Draft)
JRP Historical Consulting
Services

Page 5 of 7 ends

Report List
Report No. Other IDs Year Author(s) Title Affiliation
NWIC File # 22-0094 800 Dubuque Ave, South SF
S-048738 2011 California High-Speed Train Project,
Environmental Impact Report/Environmental
Impact Statement, San Francisco to San
Jose Section, Archaeological Survey Report,
Technical Report [Draft]
Denise Jurich and Amber PBS&J
Grady

Page 6 of 7 ends

Report List
Report No. Other IDs Year Author(s) Title Affiliation
NWIC File # 22-0094 800 Dubuque Ave, South SF
S-048738a 2011 California High-Speed Train Project,
Environmental Impact Report/Environmental
Impact Statement, San Francisco to San
Jose Section, Historic Architectural Survey
Report, Technical Report [Draft]
Amber Grady and PBS&J
Richard Brandi

Page 7 of 7 ends

STATE OF CALIFORNIA Gavin Newsom, Governor

NATIVE AMERICAN HERITAGE COMMISSION

Page 1 of 2 ends

August 25, 2022
Rebecca Auld
Lamphier-Gregory
Via Email to: [email protected]
Re: Native American Consultation, Pursuant to Senate Bill 18 (SB18), Government Codes §65352.3 and §65352.4, as well as Assembly Bill 52 (AB52), Public Resources Codes §21080.1, §21080.3.1 and §21080.3.2, 800 Dubuque Ave Project, San Mateo County Dear Ms. Auld:

Attached is a consultation list of tribes with traditional lands or cultural places located within the boundaries of the above referenced counties or projects.

Government Codes §65352.3 and §65352.4 require local governments to consult with California Native American tribes identified by the Native American Heritage Commission (NAHC) for the purpose of avoiding, protecting, and/or mitigating impacts to cultural places when creating or amending General Plans, Specific Plans and Community Plans.

Public Resources Codes §21080.3.1 and §21080.3.2 requires public agencies to consult with California Native American tribes identified by the Native American Heritage Commission (NAHC) for the purpose of avoiding, protecting, and/or mitigating impacts to tribal cultural resources as defined, for California Environmental Quality Act (CEQA) projects.

The law does not preclude local governments and agencies from initiating consultation with the tribes that are culturally and traditionally affiliated within your jurisdiction. The NAHC believes that this is the best practice to ensure that tribes are consulted commensurate with the intent of the law.

Best practice for the AB52 process and in accordance with Public Resources Code §21080.3.1(d), is to do the following:

Within 14 days of determining that an application for a project is complete or a decision by a public agency to undertake a project, the lead agency shall provide formal notification to the designated contact of, or a tribal representative of, traditionally and culturally affiliated California Native American tribes that have requested notice, which shall be accomplished by means of at least one written notification that includes a brief description of the proposed project and its location, the lead agency contact information, and a notification that the California Native American tribe has 30 days to request consultation pursuant to this section.

The NAHC also recommends, but does not require that lead agencies include in their notification letters, information regarding any cultural resources assessment that has been completed on the area of potential affect (APE), such as:

CHAIRPERSON
Laura Miranda
Luiseño

VICE CHAIRPERSON
Reginald Pagaling
Chumash

PARLIAMENTARIAN
Russell Attebery
Karuk

SECRETARY
Sara Dutschke
Miwok

COMMISSIONER
William Mungary
Paiute/White Mountain
Apache

COMMISSIONER
Isaac Bojorquez
Ohlone-Costanoan

COMMISSIONER
Buffy McQuillen
Yokayo Pomo, Yuki,
Nomlaki

COMMISSIONER
Wayne Nelson
Luiseño

COMMISSIONER
Stanley Rodriguez
Kumeyaay

EXECUTIVE SECRETARY
Raymond C.

Hitchcock
Miwok/Nisenan

NAHC HEADQUARTERS
1550 Harbor Boulevard
Suite 100
West Sacramento,
California 95691
(916) 373-3710
[email protected]
NAHC.ca.gov

Page 2 of 2 ends

1. The results of any record search that may have been conducted at an Information Center of the California Historical Resources Information System (CHRIS), including, but not limited to:
• A listing of any and all known cultural resources have already been recorded on or adjacent to the APE, such as known archaeological sites;
• Copies of any and all cultural resource records and study reports that may have been provided by the Information Center as part of the records search response; • Whether the records search indicates a low, moderate or high probability that unrecorded cultural resources are located in the APE; and
• If a survey is recommended by the Information Center to determine whether previously unrecorded cultural resources are present.

2. The results of any archaeological inventory survey that was conducted, including:
• Any report that may contain site forms, site significance, and suggested mitigation measures.

All information regarding site locations, Native American human remains, and associated funerary objects should be in a separate confidential addendum, and not be made available for public disclosure in accordance with Government Code Section 6254.10.

3. The result of the Sacred Lands File (SFL) check conducted through the Native American Heritage Commission was negative.

4. Any ethnographic studies conducted for any area including all or part of the potential APE; and

5. Any geotechnical reports regarding all or part of the potential APE.

Lead agencies should be aware that records maintained by the NAHC and CHRIS is not exhaustive, and a negative response to these searches does not preclude the existence of a tribal cultural resource. A tribe may be the only source of information regarding the existence of a tribal cultural resource.

This information will aid tribes in determining whether to request formal consultation. In the event, that they do, having the information beforehand well help to facilitate the consultation process.

If you receive notification of change of addresses and phone numbers from tribes, please notify the NAHC. With your assistance we can assure that our consultation list remains current.

If you have any questions, please contact me at my email address:

[email protected].

Sincerely,
Cody Campagne
Cultural Resources Analyst
Attachment
Amah MutsunTribal Band of
Mission San Juan Bautista
Irene Zwierlein, Chairperson
3030 Soda Bay Road
Lakeport, CA, 95453
Phone: (650) 851 - 7489
Fax: (650) 332-1526
[email protected]
Costanoan
Costanoan Rumsen Carmel
Tribe
Tony Cerda, Chairperson
244 E. 1st Street
Pomona, CA, 91766
Phone: (909) 629 - 6081
Fax: (909) 524-8041
[email protected]
Costanoan
Indian Canyon Mutsun Band of
Costanoan
Ann Marie Sayers, Chairperson
P.O. Box 28
Hollister, CA, 95024
Phone: (831) 637 - 4238
[email protected]
Costanoan
Indian Canyon Mutsun Band of
Costanoan
Kanyon Sayers-Roods, MLD
Contact
1615 Pearson Court
San Jose, CA, 95122
Phone: (408) 673 - 0626
[email protected]
Costanoan
Muwekma Ohlone Indian Tribe
of the SF Bay Area
Charlene Nijmeh, Chairperson
20885 Redwood Road, Suite 232
Castro Valley, CA, 94546
Phone: (408) 464 - 2892
[email protected]
Costanoan
Muwekma Ohlone Indian Tribe
of the SF Bay Area
Monica Arellano, Vice
Chairwoman
20885 Redwood Road, Suite 232
Castro Valley, CA, 94546
Phone: (408) 205 - 9714
[email protected]
Costanoan
The Ohlone Indian Tribe
Andrew Galvan,
P.O. Box 3388
Fremont, CA, 94539
Phone: (510) 882 - 0527
Fax: (510) 687-9393
[email protected]
Bay Miwok
Ohlone
Patwin
Plains Miwok
Wuksache Indian Tribe/Eshom
Valley Band
Kenneth Woodrow, Chairperson
1179 Rock Haven Ct.

Salinas, CA, 93906
Phone: (831) 443 - 9702
[email protected]
Foothill Yokut
Mono
1 of 1
This list is current only as of the date of this document and is based on the information available to the Commission on the date it was produced. 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 Resources Code and Section 5097.98 of the Public Resources Code.

This list is applicable only for consultation with Native American tribes under Government Code Sections 65352.3, 65352.4 et seq. and Public Resources Code Sections 21080.3.1 for the proposed 800 Dubuque Ave Project, San Mateo County.

PROJ-2022-
005001
08/25/2022 07:35 AM
Native American Heritage Commission
Tribal Consultation List
San Mateo County
8/25/2022

ENERGY CALCULATIONS

ATTACHMENT C
to the
800 Dubuque Avenue Project Initial Study / Mitigated Negative Declaration To support the Energy Analysis for the following project: 800 Dubuque Construction Equipment/Vehicles
# of
Vehicles
Hrs per
Day
HorsepowerLoad
Factor Days in Phase
Fuel Used
(gallons)
Demolition
Rubber Tired Dozers 1 8 247 0.4 120 5,017
Air Compressors 1 8 78 0.48 120 2,113
Concrete Saws 1 8 81 0.73 120 3,338
Excavators 3 8 153 0.38 120 8,858
Generator Sets 1 8 84 0.74 120 3,509
Plate Compactors 1 8 8 0.43 120 194
Sweepers/Scrubbers 1 4 64 0.46 120 831
Tractors/Loaders/Backhoes 3 8 97 0.37 120 6,078
Grading / Excavation
Bore/Drill Rigs 5 8 221 0.5 234 54,713
Cranes 1 8 231 0.29 234 6,634
Excavators 3 8 153 0.38 234 17,273
Graders 1 8 187 0.41 234 7,593
Pumps 2 8 84 0.74 234 13,684
Pumps 1 24 84 0.74 234 20,527
Rollers 1 4 80 0.38 234 1,673
Rubber Tired Dozers 1 8 247 0.4 234 9,784
Sweepers/Scrubbers 1 4 64 0.46 234 1,620
Tractors/Loaders/Backhoes 2 8 97 0.37 234 7,901
Building Construction
Aerial Lifts 2 8 63 0.31 563 10,344
Aerial Lifts 24 8 63 0.31 563 124,134
Air Compressors 1 8 78 0.48 563 9,915
Cranes 1 3.3 231 0.29 563 6,584
Cranes 2 8 231 0.29 563 31,922
Forklifts 1 8 89 0.2 563 4,714
Generator Sets 1 8 84 0.74 563 16,462
Sweepers/Scrubbers 1 4 64 0.46 563 3,898
Tractors/Loaders/Backhoes 1 4 97 0.37 563 4,752
Welders 12 8 46 0.45 563 65,785
Building - Interior / Architectural Coating
Air Compressors 1 6 78 0.48 130 1,717
Paving
Aerial Lifts 1 8 63 0.31 181 1,663
Pavers 1 8 130 0.42 181 4,182
Paving Equipment 2 8 132 0.36 181 7,280
Plate Compactors 1 8 8 0.43 181 293
Rollers 1 8 80 0.38 181 2,588
Rubber Tired Dozers 1 4 247 0.4 181 3,784
Sweepers/Scrubbers 1 4 64 0.46 181 1,253
Tractors/Loaders/Backhoes 2 8 97 0.37 181 6,112
Total Fuel Used for Construction Equipment/Vehicles 478,724 (diesel) Compression-Ignition Engine Brake-Specific Fuel Consumption (BSFC) Factors [1] used in the above calculations are (in gallons per horsepower-hour/BSFC)

0.0588 <100 horsepower
Construction Energy Use
Energy Calculations Page 1 of 5

0.0529 >100 horsepower
Worker Trips
Phase MPG [2] Trips
Trip
Length
(miles)
Total Miles
per Day Days in Phase
Fuel Used
(gallons)
Demolition 24 28 10.8 302.4 120 1,512
Grading Phase 24 43 10.8 464.4 234 4,528
Building Construction 24 557 10.8 6015.6 563 141,116
Paving 24 20 10.8 216 181 1,629
Building Interior 24 111 10.8 1198.8 130 6,494
Total Fuel Used for Construction Worker Trips 155,278 (gasoline) Construction Energy Use, Continued
Vendor Trips
Phase MPG [2] Trips
Trip
Length
(miles)
Total Miles
per Day Days in Phase
Fuel Used
(gallons)
Demolition 7.4 0 7.3 0 120 0
Grading Phase 7.4 0 7.3 0 234 0
Building Construction 7.4 252 7.3 1839.6 563 139,959
Paving 7.4 0 7.3 0 181 0
Building Interior 7.4 0 7.3 0 130 0
Total Fuel Used for Vendor Trips 139,959 (diesel)
Hauling Trips
Phase MPG [2]
Trips in
Phase
Trip
Length
(miles)
Total Miles
in Phase
Fuel Used
(gallons)
Demolition 7.4 539.4 20 10788 1,458
Grading Phase 7.4 41375 20 827500 111,824
Building Construction 7.4 16800 20 336000 45,405
Paving 7.4 267 20 5340 722
Building Interior 7.4 0 20 0 0
Total Fuel Used for Hauling Trips 159,409 (diesel)
Fuel Use Converted to MMBtu
Source
Fuel
Converted to
Energy Use
Diesel [3] 106,895 MMBtu
Gasoline [4] 17,047 MMBtu
Total Energy Use from Construction Fuel 123,942 MMBtu
Sum of above
155,278
137,381
109,786
Total Construction
Fuel Use (gallons)
Conversion Factor
Btu/gallon
778,092
Energy Calculations Page 2 of 5
Operational Vehicular Fuel Use
Gross Annual VMT 12,405,925
Fleet Class Fleet Mix
VMT per
Class
Fuel Ecomony
[5]
Fuel Consumption
(gallons)
Light Duty Auto (LDA) 0.411757 5108226.5 30.9 165314.77 Light Duty Truck 1 (LDT1) 0.041436 514051.91 26.63 19303.49 Light Duty Truck 2 (LDT2) 0.297526 3691085.2 24.36 151522.38 Medium Duty Vehicle (MDV) 0.170986 2121239.5 20.2 105011.86 Motorcycle (MCY) 0.024361 302220.74 37.06 8154.90 Total Gasoline 449,307 Light Heavy Duty 1 (LHD1) 0.030624 379919.05 18.23 20840.32 gallons Light Heavy Duty 2 (LHD2) 0.007023 87126.811 16.24 5364.95 Medium Heavy Duty (MHD) 0.00842 104457.89 9.43 11077.19 Heavy Heavy Duty (HHD) 0.002436 30220.833 6.42 4707.29
Other Bus (OBUS) 0.002246 27863.708 8.26 3373.33
Urban Bus (UBUS) 0.000679 8423.6231 5.17 1629.33
School Bus (SBUS) 0.000402 4987.1819 7.25 687.89
Motorhome (MH ) 0.002104 26102.066 9.91 2633.91 Total Diesel 50,314 gallons
Note that the above numbers represent gross fuel consumption.

Source
Diesel 50,314 [3] 6,912 MMBtu
Gasoline 449,307 [4] 49,328 MMBtu
Total Energy Use from Operational Fuel 56,240 MMBtu
Operational Built Environment
Type of Energy Annual Usage Units
Converted to
MMBtu
Electricity 1.02E+07 kWh 34697
Natural Gas 2.21E+07 kBtu 22113
*Note that because this analysis was performed prior to adoption of the General Plan 2040, some natural gas usage was assumed in the CalEEMod report. Electricity equivalency conversion does not change conclusions.

Sum of above
Total Annual Operational Energy Use 113,050 MMBtu
Operational Energy Use
137,381
109,786
Fuel Converted to Energy
Use
Total Fuel Use
(gallons)
Conversion Factor
Btu/gallon
Energy Calculations Page 3 of 5
Net Operational Vehicular Fuel Energy Use
Existing Use VMT: 1,786,678
Resultant Net Annual Gasoline Use: 384,599 gallons
Resultant Net Annual Diesel Use: 43,068 gallons
Source
Diesel 43,068 [3] 5,917 MMBtu
Gasoline 384,599 [4] 42,224 MMBtu
Total Energy Use from Net Operational Fuel 48,140 MMBtu Existing and Net Operational Built Environment
Net
Type of Energy Annual Usage Units
Converted to
MMBtu
Energy Use in
MMBtu
Electricity 8.44E+05 kWh 2880 31817
Natural Gas 2.79E+06 kBtu 2791.03 19322
Total 5671 51139
Sum of above
Total Net Annual Operational Energy Use 99,279 MMBtu
Existing and Net Energy Use
To determine the net increase in fuel usage, fuel usage of the existing uses at the site can be subtracted from the gross consumption above. The following number also incorproates the TDM reduction identified in the Operational calculations.

Existing
Net Fuel Use
(gallons)
Conversion Factor Fuel Converted to Energy
Btu/gallon Use
137,381
109,786
Energy Calculations Page 4 of 5
Sources
Unless otherwise noted, information in these calculations is from the project-specific Air Quality/Emissions Assessment for the project, including CalEEMod output tables.
[1] United States Environmental Protection Agency. 2018. Exhaust and Crankcase Emission Factors for Nonroad Compression-Ignition Engines in MOVES2014b . July 2018. Available at:
https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=P100UXEN.pdf. [2] United States Department of Transportation, Bureau of Transportation Statistics. 2018. National Transportation Statistics 2018 . Available at: https://www.bts.gov/sites/bts.dot.gov/files/docs/browse-statistical-products-anddata/nationaltransportation-statistics/223001/ntsentire2018q4.pdf.

https://www.eia.gov/totalenergy/data/monthly/archive/00352205.pdf [4] California Air Resources Board, CA-GREET 2.0 Supplemental Document and Tables of Changes, Appendix C, Supplement to the LCFS CA-GREET 2.0 Model, 12/15/2014 , page C-24, Table 10. Available at:
https://ww2.arb.ca.gov/sites/default/files/barcu/regact/2015/lcfs2015/lcfs15appc.pdf [5] California Air Resources Board (CARB), EMFAC2021 v1.0.0., 2021. Available at https://ww2.arb.ca.gov/ourwork/programs/mobile-source-emissions-inventory/msei-modeling-tools-emfac-software-and [6] Anticipated TDM reduction information is from the the project-specific CEQA Transportation Analysis.

Acronyms used include:

Btu = British Thermal Units
hrs = hours
kBtu = Thousand British Thermal Units
kWH = kilowatt hours
MMBtu = Million British Thermal Units
MPG = miles per gallon
TDM = Transportation Demand Management
VMT = vehicle miles traveled
Energy Calculations Page 5 of 5

TRANSPORTATION ANALYSIS

ATTACHMENT D
to the
800 Dubuque Avenue Project Initial Study / Mitigated Negative Declaration 800 Dubuque Avenue
CEQA Transportation Analysis
Prepared for:

Lamphier-Gregory
March 24, 2023
Hexagon Transportation Consultants, Inc.

Hexagon Office: 4 North Second Street, Suite 400
San Jose, CA 95113
Phone: 408.971.6100
Hexagon Job Number: 22TD03
Client Name: Lamphier-Gregory
800 Dubuque Avenue – CEQA Transportation Analysis
i | Page
Executive Summary
As required by the California Environmental Quality Act (CEQA), this report includes an analysis of Vehicles Miles Travelled (VMT) and an evaluation of potential impacts to transit, pedestrian, and bicycle facilities for the proposed redevelopment of 800 Dubuque Avenue in South San Francisco to a higher density Office/Research & Development uses.

The project is presumed to have a less than significant impact on VMT as it is located less than ½ mile from the South San Francisco Caltrain Station. The project is proposing an FAR of 3.3, would not exceed the required number of parking spaces and is consistent with the land use designation under the City’s 2040 General Plan. The project would also implement a Transportation Demand Management (TDM) program as required by the Municipal Code that requires all non-residential projects that would generate more than 100 daily trips to implement various trip reduction measures to reduce single occupancy vehicle trips (SOV) and achieve a minimum 50% alternative mode use. Given its proximity to the Caltrain station, the project is expected to achieve higher than the minimum 50% alternative mode use. Therefore, a detailed VMT analysis is not required.

The project would not remove any pedestrian facilities, nor would it conflict with any adopted plans or policies for new pedestrian facilities. Accordingly, the project would have no significant impact on pedestrian facilities.

The project would provide on-site bicycle parking facilities. The project would not remove any bicycle facilities, nor would it conflict with any adopted plans or policies for new bicycle facilities.

Accordingly, the project would have no significant impact on bicycle facilities.

The project is expected to add a high number of new transit riders. However, given the extensive services available, the new riders could be accommodated. The project would therefore have no significant impact on transit service.

Adequate corner sight distance should be provided for drivers exiting both project driveways. The project would underground 462 linear feet of electrical line and clear all line-of-sight obstructions along the project’s frontage on Dubuque Avenue. The project shall demonstrate to the satisfaction of the City that the site sight distance is adequate at both project driveways. With the provision of adequate sight distance at both project driveways, the project’s impact on safety would be reduced to less than significant.
800 Dubuque Avenue – CEQA Transportation Analysis
ii | Page
The project would not reroute or change any of the City streets in its vicinity that would impact emergency vehicle access to properties along Dubuque Avenue. The proposed site access roadways would accommodate emergency vehicles. Thus, the project would not result in any emergency vehicle access impact that would be considered significant. 800 Dubuque Avenue – Transportation Analysis
1 | Page
Project Description
The purpose of this report is to analyze the transportation-related impacts of the proposed Office/Research & Development project at 800 Dubuque Avenue in South San Francisco, as required by the California Environmental Quality Act (CEQA).

The proposed project would involve demolition of the three existing buildings located on the 800 to 890 Dubuque Avenue parcels and construction of three new office/research and development (R&D) buildings. The project would be comprised of three buildings: the 10-story North building, the 6-story South building, and the 9-story West building, for a total of up to approximately 900,000 square feet of floor area. The north building would be the tallest at approximately 195 feet (including the mechanical penthouse). The buildings would be connected by a two-story podium that provides open space and an approximately 7,200 square foot fitness center. The center of the site would contain a plaza and courtyard lined with on-site food/beverage and tenant amenity uses totaling approximately 6,600 square feet, as well as an approximately 7,500 square foot event center. The project is intended to be a mix of R&D space and offices.

The west building would be oriented along Dubuque Avenue, and the north and south buildings would be oriented along the internal roadways. The project is located one-quarter mile north of the South San Francisco Caltrain station. The development is consistent with the land use designation in the City’s General Plan, Shape SSF 2040, and related zoning, which plan for higher-density, transitoriented uses at and around the project site. Structured parking would be provided in four stories below grade, with approximately 1,335 parking spaces. Vehicular access to the project site would be provided via two driveways on Dubuque Avenue.

This report includes an analysis of Vehicle Miles Travelled (VMT), potential impacts to pedestrian and bicycle facilities and transit services, and the project’s safety and emergency access. 800 Dubuque Avenue – Transportation Analysis
2 | Page
CEQA Analysis
VMT Analysis
Pursuant to SB 743, the CEQA 2019 Update Guidelines Section 15064.3, subdivision (b) states that vehicle miles travelled (VMT) will be the metric in analyzing transportation impacts for land use projects for California Environmental Quality Act (CEQA) purposes. The City of South San Francisco has adopted certain thresholds of significance based on the project type to guide in determining when a project will have a significant transportation impact. For non-retail land use projects, a significant impact would occur if the VMT would be above the threshold, which is defined as 15% below the regional average.

The City of South San Francisco provides screening criteria for development projects. The criteria are based on the type of project, characteristics, and/or location. If a project meets the City’s screening criteria, the project is expected to result in less-than-significant impacts, and a detailed CEQA VMT analysis is not required. The City’s policy states that projects within ½ mile of an existing or planned highquality transit corridor or major transit station should be presumed to have a less-than-significant impact on VMT. However, this presumption would not apply if the project FAR is less than 0.75, includes parking that is higher than required by the City, is inconsistent with the City’s General Plan, or replaces affordable residential units with a smaller number of market-rate units. The project site is located less than onequarter mile from the South San Francisco Caltrain Station. The project is proposing an FAR of 3.3, would not exceed the required number of parking spaces, and is consistent with the land use proposed in the City’s General Plan, Shape SSF 2040. Therefore, a detailed VMT analysis is not required.

The project would also implement a Transportation Demand Management (TDM) program as required by the Municipal Code, which requires all new developments to implement various trip reduction measures to reduce single occupancy vehicle trips (SOV) based on their anticipated effect on the City’s transportation network. The project would be categorized as a Tier 4 development, which includes all office and R&D projects with at least 400,000 s.f. of gross floor area and requires a minimum 50% alternative mode use. The project would implement TDM measures to encourage employees and visitors to use transit, given its proximity to the Caltrain station.

Cumulative Impact Analysis
According to the Governor’s Office of Planning and Research (OPR), a finding of a less-than-significant project impact based on project screening criteria would imply a less than significant cumulative impact.

The project aligns with the land use controls under the City’s General Plan, Shape SSF 2040, which plans for higher-density, transit-oriented uses at and around the project site: re-imagining the area as a new urban corridor accessible to pedestrians, bicyclists, and transit riders. Therefore, the project would be considered as part of the cumulative solution to meet the General Plan’s long-range transportation goals and would result in a less-than-significant cumulative impact.

Pedestrians, Bicycles and Transit
Pedestrian Facilities
Sidewalks are provided on the east side of Dubuque Avenue from Oyster Point Boulevard to Grand Avenue, and along Grand Avenue from Gateway Boulevard to Airport Boulevard. The signalized intersections at Dubuque Avenue/Oyster Point Boulevard and Dubuque Avenue/Grand Avenue provide crosswalks, curb ramps, and pedestrian-actuated pedestrian-crossing phases on all approaches. The project would reconstruct the sidewalk along its frontage on Dubuque Avenue by moving it away from the curb and configuring it in a winding path through planting and trees to provide enhanced comfort and safety for pedestrians (see Figure 1). Striped crosswalks would be provided across the north and the south driveways to provide connections to existing sidewalks to the north and south of the project site. 800 Dubuque Avenue – Transportation Analysis
3 | Page
As part of the South San Francisco Caltrain Reconstruction Project, a new pedestrian/bicycle undercrossing was constructed under the Caltrain tracks that provides a direct connection for pedestrians and bicyclists between areas to the west (Airport Boulevard) and east (Poletti Way and East Grand Avenue) of the Caltrain tracks. This undercrossing also provides a connection to the new Caltrain station platform.

The South San Francisco Caltrain station is currently pedestrian-accessible from Dubuque Avenue via a staircase located at the northwest corner of the signalized intersection at Dubuque Avenue and Grand Avenue. However, no ADA access is provided to the Caltrain station from Dubuque Avenue. The 580 Dubuque Avenue project, which is located adjacent to the Caltrain station parking lot is currently under development and is conditioned to provide a pedestrian route, including ADA access, to the Caltrain station.

The project is well situated to take advantage of the existing and planned pedestrian facilities in the immediate vicinity. The existing network of sidewalks and crosswalks, together with the planned addition of ADA access to the Caltrain station from Dubuque Avenue (via the 580 Dubuque Avenue project), provide good connectivity and safe routes to transit services and other points of interest in the downtown area.

The project would not remove any pedestrian facilities, nor would it conflict with the Active South City, the City of South San Francisco’s Bicycle and Pedestrian Master Plans. Accordingly, the project would have no significant impact on pedestrian facilities.

Bicycle Facilities
Bicycle access to the project site is currently limited as there are no bike lanes on Dubuque Avenue. As stated above, the new pedestrian/bicycle undercrossing provides bicycle access between East Grand Avenue/Poletti Way and Airport Boulevard, with direct access to the Caltrain station platform. Bicycle access between the project site and the South San Francisco Caltrain station would be provided via the existing Caltrain Station access driveway on Dubuque Avenue. Other existing bicycle facilities in the vicinity of the project site are Class II bike lanes on Airport Boulevard north of Miller Avenue.

The project would provide short-term and long-term bicycle parking facilities on site to meet the requirements of South San Francisco municipal code. The project would not remove any bicycle facilities, nor would it conflict with the City’s Bicycle and Pedestrian Master Plans. Thus, the project would have no significant impact on bicycle facilities.

Transit Facilities
Existing transit service to the study area is provided by Caltrain, Bay Area Rapid Transit (BART), Water Emergency Transit Agency (WETA), San Mateo County Transit District (SamTrans) and commuter shuttles. The project site is located less than one-quarter mile from the Caltrain station.

Caltrain provides commuter rail service between San Francisco and Gilroy. The South San Francisco Caltrain Station serves local and limited-stop trains with 40 to 60-minute headways during weekdays. The project is located one-quarter mile from the South San Francisco Caltrain station.

The recently reconstructed South San Francisco Caltrain station provides passengers access to the downtown from the station’s center platform via ramps connecting to the newly constructed tunnel underneath the Caltrain tracks. The tunnel connects to a pedestrian plaza at Grand Avenue/Airport Boulevard on the west side of the tracks and a transit plaza at the intersection of Grand Avenue and Poletti Way on the east side of the tracks. Buses and shuttles pick up and drop off Caltrain passengers from the new east-side plaza instead of the parking lot on the west side of the station, which results in time savings for passengers commuting to the City’s biotech job center on the east side of the tracks.

Combined with the Caltrain Electrification project, the reconstructed station is expected to see increased service levels, which has been included in Caltrain planning. 800 Dubuque Avenue – Transportation Analysis
4 | Page
The two BART stations closest to the project area are the San Bruno Station and the South San Francisco Station. Both stations are located within 3 miles of the project site. The Genesis One Tower Place shuttle (OTP) operated by commute.org provides service between the South San Francisco Caltrain station and the South San Francisco BART station. The OTP shuttle operates along Dubuque Avenue and currently has a stop on the southern end of the project site. With the proposed redevelopment, the shuttle stop would be facilitated on site along the drop-off zone that would be provided on the north side of the project site via the north driveway (see Figure 2).

WETA provides weekday commuter ferry service between Oakland/Alameda ferry terminals and the South San Francisco Ferry Terminal at Oyster Point. The South San Francisco Ferry terminal is located approximately 2.5 miles from the project site. Shuttle service is provided between the South San Francisco ferry terminal and the Caltrain station.

SamTrans provides bus service primarily on the west side of US 101. The closest bus stops to the project site are approximately 0.5 miles to the west at the intersection of Airport Boulevard and Linden Avenue and are served by Routes 292 and 397. Recently, SamTrans has extended service to the East of 101 Area via Route 130. The closest bus stop served by Route 130 is located at the Gateway Boulevard/Corporate Drive intersection, which is approximately 1 mile from the project site.

Commuter shuttles provide weekday commute connections between the Caltrain station and BART, the WETA ferry terminal, and local employers in the East of 101 Area. All shuttles are wheelchair-accessible and equipped with a bicycle rack on the front of the vehicle. The new transit plaza at the intersection of Grand Avenue and Poletti Way, on the east side of the Caltrain tracks, provides a direct pedestrian connection between the Caltrain station and the following shuttle services: the Genesis One Tower Place (OTP) shuttle, the Oyster Point Caltrain (OPC) shuttle, the Utah-Grand Caltrain (UGC) shuttle, and the Oyster Point Ferry (OPF) shuttle.

The project is expected to add a substantial number of new transit riders. However, with reduced transit ridership following COVID-19 pandemic, and the number of different services available (Caltrain, SamTrans busses, shuttles to the BART and ferry stations), it is anticipated that substantial new ridership could be accommodated.

The project would not produce a detrimental impact to local transit or shuttle service. The project would therefore have no significant impact on transit service.

Safety (Sight Distance)
The site driveways were evaluated to determine whether vehicles exiting the site would have adequate sight distance to see bicycles or motor vehicles traveling on Dubuque Avenue. The minimum acceptable sight distance is what the CA MUTCD has defined as stopping sight distance. Sight distance requirements vary depending on roadway speeds. For Dubuque Avenue, which has a posted speed limit of 30 mph, the stopping sight distance is 250 feet for motor vehicles (based on a design speed of 35 mph). Accordingly, a driver must be able to see 250 feet along Dubuque Avenue to be able to avoid a collision with other vehicles. Factors that can affect sight distance are geometric features such as horizontal and vertical curves in the road, or line-of-sight obstructions like on-street parking, landscaping, and signs. Providing the appropriate sight distance reduces the likelihood of a collision at a driveway or intersection and provides drivers with the ability to exit a driveway or locate sufficient gaps in traffic.

Based on observations conducted in the field, it appears that there would be adequate sight distance for drivers exiting the project site looking right to the north on Dubuque Avenue at both driveways. The project will remove all existing sign boards near the proposed driveways. However, for drivers exiting the project site to travel south on Dubuque Avenue, it appears that there would be inadequate sight distance looking left to the south on Dubuque Avenue due to a slight horizontal curve and line-of-sight obstructions. The line-of-sight obstructions include utility poles, landscaping, sign boards and the metal fence on the south side of the project site (see Figure 3).

The project proposes to underground approximately 462 linear feet of electrical line along the project’s frontage on Dubuque Avenue and clear all line-of sight obstructions along the project’s frontage on 800 Dubuque Avenue – Transportation Analysis
5 | Page
Dubuque Avenue. The project shall demonstrate to the satisfaction of the City that the sight distance is adequate at both project driveways, which could include the following measures. • The applicant shall coordinate with the City to decrease the speed limit on Dubuque Avenue to 25 mph.
• The applicant shall coordinate with the City to remove line-of-sight obstructions (vegetation and sign boards) within the City’s right of way to the south of the project. • The applicant shall coordinate with the adjacent property of 720 Dubuque Avenue/PG&E easement to push back the existing metal fence on the southern border of the project site and remove vegetation to provide a clear zone on the corner of 720 Dubuque Avenue/PG&E easement and the project’s southern driveway.

With the provision adequate sight distance at both project driveways, the project’s impact on safety would be reduced to less than significant.

Emergency and Truck Access
Emergency access was evaluated to determine whether the project would provide adequate vehicular ingress and egress to the project site, and a viable route to and through the project site. A review of the preliminary fire access plan prepared by Perkins & Will shows that adequate access would be provided for emergency vehicles to the site. The project site would be served by two driveways, one that would be located along the northern perimeter and the other that would be located along the southern perimeter of the project site. The two driveways would loop around the project site (see Figure 2) to provide vehicular circulation along the entire perimeter of the project site. The plan shows that the perimeter road would be at least 26 feet wide which would be adequate to facilitate fire apparatus ingress/egress and would be located 15 to 30 feet from outer edge of the building.

The site plan shows that the project would provide a drop-off zone on the north side of the project for passenger loading in front of the west building that would be accessible via the north driveway.

A truck loading area is proposed for the west building on the south side that can be accessed via the southern driveway, and a combined truck loading area is proposed for the north and the south buildings on the east end of the project site that can be accessed via both driveways. The site plan shows trash enclosures for all three buildings adjacent to the truck loading areas.

Hexagon reviewed the truck turning templates prepared by BKF engineers for a WB-40 truck and a frontloading garbage truck (ACX64) as these vehicles would enter and exit the site. The turning templates showed that these vehicles would be able to navigate through the site to and from the loading dock and the trash collection areas without obstruction. Since the trash enclosures would be located next to the loading areas, adequate clearance would be provided for garbage trucks to empty the bins over the truck.

Since garbage collection would occur on-site, along the perimeter road, traffic operations would not be affected along Dubuque Avenue.

The proposed project would not reroute or change any of the City streets in its vicinity that would impact emergency vehicle access to properties along Dubuque Avenue. The proposed site access roadways would accommodate emergency vehicles. Thus, the project would not result in any emergency vehicle access impact that would be considered significant.
800 Dubuque Avenue - CEQA Transportation Analysis
Figure 1
Proposed Pedestrian and Bicycle Access
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800 Dubuque Avenue - CEQA Transportation Analysis
Figure 2
Proposed Vehicular Access
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800 Dubuque Avenue - CEQA Transportation Analysis
Figure 3
Field Visit - Sight Distance
Sight Distance for a Driver Exiting the Southern
Driveway looking Left onto Dubuque Avenue
Sight Distance for a Driver Exiting the Northern
Driveway looking Left onto Dubuque Avenue
800 Dubuque Avenue - CEQA Transportation Analysis
Figure 4
Clear Sight Triangles
Clear Sight Triangle Looking Left - North Dwy Clear Sight Triangle Looking Left - South Dwy

South San Francisco City CouncilJuly 12, 2023

South San Francisco City Council
July 12, 2023