Agenda packet — Concord City Council, October 24, 2023 (part 2 of 3)

Consistency Analysis
CEQA Class 32 Categorical Exemption Report 25
The western portion of the project site is developed with a single-family house and associated accessory buildings. Contra Costa County Assessor data indicates this residence may date to 1907.

The City has determined that the residence is not an eligible historic resource and is not a historic resource pursuant to the CEQA Guidelines. The existing building on the project site is not known to be associated with events that have made a significant contribution to California or Concord’s history and cultural heritage, nor with the lives of any persons who have historic importance. The site is not listed under the Contra Costa County Historic Resource Inventory, and the Concord Historical Society has no records pertaining to this property or the building itself. Based on review of the residence and surrounding accessory structures, the building does not embody a distinctive work and is in a depreciated state. Therefore, there would be no impacts to historical resources.

The project site does not contain known historic or archeological resources. Therefore, this exception does not apply to the project.

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City of Concord
1836 Clayton Way Residential Project
26 5 Summary
Based on this analysis, the proposed 1836 Clayton Way project meets all criteria for a Class 32 Categorical Exemption pursuant to Section 15332 of the CEQA Guidelines.

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References
CEQA Class 32 Categorical Exemption Report 27
6 References
Bay Area Air Quality Management District (BAAQMD). 2017. Air Quality Standards and Attainment Status. January 5, 2017. https://www.baaqmd.gov/about-air-quality/research-and-data/airquality-standards-and-attainment-status. ______.2022. Screening for Criteria Air Pollutants and Precursors. https://www.baaqmd.gov/~/media/files/planning-and-research/ceqa/ceqa-guidelines2022/ceqa-guidelines-chapter-4-screening_final-pdf.pdf?la=en.

California Department of Fish and Wildlife (CDFW). 2021. State and Federally Listed Endangered, Threatened, and Rare Plants of California. Available at :

C:/Users/mfajardo/Downloads/CNDDB_Endangered_Threatened_and_Rare_Plants_List.pdf.

California Department of Toxic Substances Control (DTSC). 2021. EnviroStor Hazardous Waste and Substances Site List.
https://www.envirostor.dtsc.ca.gov/public/search.asp?cmd=search&reporttype=CORTESE& site_type=CSITES,OPEN,FUDS,CLOSE&status=ACT,BKLG,COM&reporttitle=HAZARDOUS+WA STE+AND+SUBSTANCES+SITE+LIST.

California Department of Transportation (Caltrans).2018. List of Eligible and Officially Designated State Scenic Highways. https://dot.ca.gov/programs/design/lap-landscape-architectureand-community-livability/lap-liv-i-scenic-highways. ______.2020. Caltrans Vibration Guidance Manual. April 2020. https://dot.ca.gov/programs/environmental-analysis/noise-vibration/guidance-manuals.

California Native Plant Society (CNPS). Rare Plant Program. 2021. Inventory of Rare and Endangered Plants (online edition, v8-03 0.45). California Native Plant Society, Sacramento, CA. Available at: http://www.rareplants.cnps.org.

California Office of Historic Preservation. 2021. California Register of Historical Resources: Sonoma. https://ohp.parks.ca.gov/listedresources/.

Concord, City of. 2007. Concord 2030 General Plan: Volumes I-III. Concord, CA. October 2, 2007. ______.2012. Draft Supplemental Environmental Impact Report to the 2030 Concord General Plan EIR for the Concord Development Code Project. City of Concord, Contra Costa County, California. State Clearinghouse No. 2006062093. April 11, 2012.

Federal Transit Administration (FTA) .2018. Transit Noise and Vibration Impact Assessment Manual.

September 2018. https://www.transit.dot.gov/sites/fta.dot.gov/files/docs/researchinnovation/118131/transit-noise-and-vibration-impact-assessment-manual-fta-report-no0123_0.pdf. ______.2011. Highway Traffic Noise: Analysis and Abatement Guidance. December 2011. https://www.fhwa.dot.gov/environment/noise/regulations_and_guidance/analysis_and_ab atement_guidance/revguidance.pdf (accessed September 2021).

Institute of Transportation Engineers. (2021). Trip Generation Manual (11). Institute of Transportation Engineers.

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City of Concord
1836 Clayton Way Residential Project
28 National Parks Service.2021. National Register of Historic Places. https://www.nps.gov/subjects/nationalregister/index.htm.

State Water Resources Control Board [SWRCB]. 2021. GeoTracker database. https://geotracker.waterboards.ca.gov/map/?CMD=runreport&myaddress=sonoma+boulev ard%2C+vallejo.

United States Fish and Wildlife Service (USFWS). 2021a. Information for Planning and Consultation.

Available at: https://ecos.fws.gov/ipac/.
______.2021b. Wetlands Mapper. November 30, 2021. Available at:
https://www.fws.gov/wetlands/data/mapper.html.

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Appendix A
Arborist Report

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Appendix B
California Emissions Estimator Model Results

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Clayton Way Concord CE Report Custom Report
Table of Contents

1. Basic Project Information

1.1. Basic Project Information

1.2. Land Use Types

1.3. User-Selected Emission Reduction Measures by Emissions Sector

2. Emissions Summary

2.1. Construction Emissions Compared Against Thresholds

2.2. Construction Emissions by Year, Unmitigated

2.3. Construction Emissions by Year, Mitigated

2.4. Operations Emissions Compared Against Thresholds

2.5. Operations Emissions by Sector, Unmitigated

2.6. Operations Emissions by Sector, Mitigated

3. Construction Emissions Details

3.1. Demolition (2023) - Unmitigated

3.2. Demolition (2023) - Mitigated

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3.3. Site Preparation (2023) - Unmitigated

3.4. Site Preparation (2023) - Mitigated

3.5. Grading (2023) - Unmitigated

3.6. Grading (2023) - Mitigated

3.7. Grading (2024) - Unmitigated

3.8. Grading (2024) - Mitigated

3.9. Building Construction (2024) - Unmitigated

3.10. Building Construction (2024) - Mitigated

3.11. Paving (2024) - Unmitigated

3.12. Paving (2024) - Mitigated

3.13. Architectural Coating (2024) - Unmitigated

3.14. Architectural Coating (2024) - Mitigated

4. Operations Emissions Details

4.1. Mobile Emissions by Land Use

4.1.1. Unmitigated

4.1.2. Mitigated

4.2. Energy

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4.2.1. Electricity Emissions By Land Use - Unmitigated

4.2.2. Electricity Emissions By Land Use - Mitigated

4.2.3. Natural Gas Emissions By Land Use - Unmitigated

4.2.4. Natural Gas Emissions By Land Use - Mitigated

4.3. Area Emissions by Source

4.3.2. Unmitigated

4.3.1. Mitigated

4.4. Water Emissions by Land Use

4.4.2. Unmitigated

4.4.1. Mitigated

4.5. Waste Emissions by Land Use

4.5.2. Unmitigated

4.5.1. Mitigated

4.6. Refrigerant Emissions by Land Use

4.6.1. Unmitigated

4.6.2. Mitigated

4.7. Offroad Emissions By Equipment Type

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4.7.1. Unmitigated

4.7.2. Mitigated

4.8. Stationary Emissions By Equipment Type

4.8.1. Unmitigated

4.8.2. Mitigated

4.9. User Defined Emissions By Equipment Type

4.9.1. Unmitigated

4.9.2. Mitigated

4.10. Soil Carbon Accumulation By Vegetation Type

4.10.1. Soil Carbon Accumulation By Vegetation Type - Unmitigated

4.10.2. Above and Belowground Carbon Accumulation by Land Use Type - Unmitigated

4.10.3. Avoided and Sequestered Emissions by Species - Unmitigated

4.10.4. Soil Carbon Accumulation By Vegetation Type - Mitigated

4.10.5. Above and Belowground Carbon Accumulation by Land Use Type - Mitigated

4.10.6. Avoided and Sequestered Emissions by Species - Mitigated

5. Activity Data

5.1. Construction Schedule

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5.2. Off-Road Equipment

5.2.1. Unmitigated

5.2.2. Mitigated

5.3. Construction Vehicles

5.3.1. Unmitigated

5.3.2. Mitigated

5.4. Vehicles

5.4.1. Construction Vehicle Control Strategies

5.5. Architectural Coatings

5.6. Dust Mitigation

5.6.1. Construction Earthmoving Activities

5.6.2. Construction Earthmoving Control Strategies

5.7. Construction Paving

5.8. Construction Electricity Consumption and Emissions Factors

5.9. Operational Mobile Sources

5.9.1. Unmitigated

5.9.2. Mitigated

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5.10. Operational Area Sources

5.10.1. Hearths

5.10.1.1. Unmitigated

5.10.1.2. Mitigated

5.10.2. Architectural Coatings

5.10.3. Landscape Equipment

5.10.4. Landscape Equipment - Mitigated

5.11. Operational Energy Consumption

5.11.1. Unmitigated

5.11.2. Mitigated

5.12. Operational Water and Wastewater Consumption

5.12.1. Unmitigated

5.12.2. Mitigated

5.13. Operational Waste Generation

5.13.1. Unmitigated

5.13.2. Mitigated

5.14. Operational Refrigeration and Air Conditioning Equipment

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5.14.1. Unmitigated

5.14.2. Mitigated

5.15. Operational Off-Road Equipment

5.15.1. Unmitigated

5.15.2. Mitigated

5.16. Stationary Sources

5.16.1. Emergency Generators and Fire Pumps

5.16.2. Process Boilers

5.17. User Defined

5.18. Vegetation

5.18.1. Land Use Change

5.18.1.1. Unmitigated

5.18.1.2. Mitigated

5.18.1. Biomass Cover Type

5.18.1.1. Unmitigated

5.18.1.2. Mitigated

5.18.2. Sequestration

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5.18.2.1. Unmitigated

5.18.2.2. Mitigated

8. User Changes to Default Data

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1. Basic Project Information

1.1. Basic Project Information
Data Field Value
Project Name Clayton Way Concord CE Report
Construction Start Date 12/1/2023
Operational Year 2024
Lead Agency City of Concord
Land Use Scale Project/site
Analysis Level for Defaults County
Windspeed (m/s) 3.60
Precipitation (days) 35.8
Location 1836 Clayton Way, Concord, CA 94519, USA
County Contra Costa
City Concord
Air District Bay Area AQMD
Air Basin San Francisco Bay Area
TAZ 1336
EDFZ 1
Electric Utility Pacific Gas & Electric Company
Gas Utility Pacific Gas & Electric
App Version 2022.1.1.13

1.2. Land Use Types
Land Use Subtype Size Unit Lot Acreage Building Area (sq ft) Landscape Area (sq ft)
Special Landscape
Area (sq ft)
Population Description

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Single Family
Housing

14.0 Dwelling Unit 4.55 27,300 14,893 — 40.0 —

1.3. User-Selected Emission Reduction Measures by Emissions Sector Sector # Measure Title
Construction C-5 Use Advanced Engine Tiers

2. Emissions Summary

2.1. Construction Emissions Compared Against Thresholds Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Un/Mit. TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 2.18 42.9 15.9 21.6 0.05 0.65 0.16 0.80 0.60 0.04 0.63 — 5,383 5,383 0.22 0.05 0.77 5,405 Mit. 0.69 42.7 4.31 31.1 0.04 0.13 0.16 0.28 0.13 0.04 0.16 — 4,827 4,827 0.19 0.05 0.77 4,848 %
Reduced
68% < 0.5% 73% -44% 11% 80% — 64% 79% — 74% — 10% 10% 10% 8% — 10% Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 5.05 4.22 40.6 36.0 0.06 1.90 7.10 9.00 1.75 3.47 5.22 — 6,298 6,298 0.27 0.10 0.04 6,336 Mit. 0.72 0.68 4.16 32.7 0.05 0.13 7.10 7.23 0.13 3.47 3.60 — 6,036 6,036 0.25 0.10 0.04 6,061 %
Reduced
86% 84% 90% 9% 3% 93% — 20% 93% — 31% — 4% 4% 8% 4% — 4% Average
Daily
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 0.49 1.46 3.65 3.80 0.01 0.15 0.28 0.34 0.14 0.14 0.19 — 834 834 0.03 0.01 0.06 838 Page 86 of 336 Clayton Way Concord CE Report Custom Report, 5/18/2023
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Mit. 0.14 1.18 1.13 4.68 0.01 0.03 0.28 0.29 0.03 0.14 0.15 — 827 827 0.03 0.01 0.06 830 %
Reduced
72% 19% 69% -23% — 82% — 16% 81% — 26% — 1% 1% — — — 1% Annual
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 0.09 0.27 0.67 0.69 < 0.005 0.03 0.05 0.06 0.03 0.03 0.04 — 138 138 0.01 < 0.005 0.01 139 Mit. 0.03 0.22 0.21 0.85 < 0.005 0.01 0.05 0.05 < 0.005 0.03 0.03 — 137 137 0.01 < 0.005 0.01 137 %
Reduced
72% 19% 69% -23% 1% 82% — 16% 81% — 26% — 1% 1% 1% 1% — 1%

2.2. Construction Emissions by Year, Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Year TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily -
Summer
(Max)
— — — — — — — — — — — — — — — — — —
2024 2.18 42.9 15.9 21.6 0.05 0.65 0.16 0.80 0.60 0.04 0.63 — 5,383 5,383 0.22 0.05 0.77 5,405 Daily -
Winter
(Max)
— — — — — — — — — — — — — — — — — —
2023 5.05 4.22 40.6 36.0 0.06 1.90 7.10 9.00 1.75 3.47 5.22 — 6,298 6,298 0.27 0.10 0.04 6,336 2024 2.85 2.39 21.4 19.6 0.05 0.93 0.13 1.06 0.85 0.03 0.89 — 5,034 5,034 0.20 0.05 0.02 5,054 Average
Daily
— — — — — — — — — — — — — — — — — —
2023 0.16 0.13 1.25 1.12 < 0.005 0.06 0.28 0.34 0.05 0.14 0.19 — 193 193 0.01 < 0.005 0.02 194 2024 0.49 1.46 3.65 3.80 0.01 0.15 0.02 0.18 0.14 0.01 0.15 — 834 834 0.03 0.01 0.06 838 Annual — — — — — — — — — — — — — — — — — —
2023 0.03 0.02 0.23 0.20 < 0.005 0.01 0.05 0.06 0.01 0.03 0.04 — 31.9 31.9 < 0.005 < 0.005 < 0.005 32.0 2024 0.09 0.27 0.67 0.69 < 0.005 0.03 < 0.005 0.03 0.03 < 0.005 0.03 — 138 138 0.01 < 0.005 0.01 139

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2.3. Construction Emissions by Year, Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Year TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily -
Summer
(Max)
— — — — — — — — — — — — — — — — — —
2024 0.69 42.7 4.31 31.1 0.04 0.13 0.16 0.28 0.13 0.04 0.16 — 4,827 4,827 0.19 0.05 0.77 4,848 Daily -
Winter
(Max)
— — — — — — — — — — — — — — — — — —
2023 0.72 0.68 3.76 32.7 0.05 0.13 7.10 7.23 0.13 3.47 3.60 — 6,036 6,036 0.25 0.10 0.04 6,061 2024 0.65 0.62 4.16 27.8 0.05 0.12 0.13 0.26 0.12 0.03 0.15 — 5,034 5,034 0.20 0.05 0.02 5,054 Average
Daily
— — — — — — — — — — — — — — — — — —
2023 0.02 0.02 0.12 0.99 < 0.005 < 0.005 0.28 0.29 < 0.005 0.14 0.15 — 183 183 0.01 < 0.005 0.02 184 2024 0.14 1.18 1.13 4.68 0.01 0.03 0.02 0.05 0.03 0.01 0.03 — 827 827 0.03 0.01 0.06 830 Annual — — — — — — — — — — — — — — — — — —
2023 < 0.005 < 0.005 0.02 0.18 < 0.005 < 0.005 0.05 0.05 < 0.005 0.03 0.03 — 30.3 30.3 < 0.005 < 0.005 < 0.005 30.4 2024 0.03 0.22 0.21 0.85 < 0.005 0.01 < 0.005 0.01 < 0.005 < 0.005 0.01 — 137 137 0.01 < 0.005 0.01 137

2.4. Operations Emissions Compared Against Thresholds
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Un/Mit. TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 0.70 1.33 0.80 5.04 0.01 0.04 0.29 0.33 0.04 0.05 0.09 6.14 1,446 1,452 0.69 0.04 3.88 1,485 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —

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Unmit. 0.59 1.22 0.86 4.02 0.01 0.04 0.29 0.33 0.04 0.05 0.09 6.14 1,383 1,389 0.70 0.04 0.29 1,420 Average
Daily
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 0.60 1.24 0.61 4.15 0.01 0.02 0.29 0.31 0.02 0.05 0.07 6.14 1,103 1,109 0.69 0.04 1.79 1,141 Annual
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 0.11 0.23 0.11 0.76 < 0.005 < 0.005 0.05 0.06 < 0.005 0.01 0.01 1.02 183 184 0.11 0.01 0.30 189

2.5. Operations Emissions by Sector, Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Sector TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Mobile 0.58 0.54 0.39 4.08 0.01 0.01 0.29 0.30 0.01 0.05 0.06 — 890 890 0.04 0.04 3.68 906 Area 0.10 0.78 0.24 0.89 < 0.005 0.02 — 0.02 0.02 — 0.02 0.00 297 297 0.01 < 0.005 — 297 Energy 0.02 0.01 0.16 0.07 < 0.005 0.01 — 0.01 0.01 — 0.01 — 256 256 0.03 < 0.005 — 257 Water — — — — — — — — — — — 0.98 2.44 3.42 0.10 < 0.005 — 6.65 Waste — — — — — — — — — — — 5.16 0.00 5.16 0.52 0.00 — 18.1 Refrig. — — — — — — — — — — — — — — — — 0.20 0.20
Total 0.70 1.33 0.80 5.04 0.01 0.04 0.29 0.33 0.04 0.05 0.09 6.14 1,446 1,452 0.69 0.04 3.88 1,485 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Mobile 0.55 0.51 0.46 3.85 0.01 0.01 0.29 0.30 0.01 0.05 0.06 — 830 830 0.05 0.04 0.10 843 Area 0.03 0.70 0.23 0.10 < 0.005 0.02 — 0.02 0.02 — 0.02 0.00 295 295 0.01 < 0.005 — 295 Energy 0.02 0.01 0.16 0.07 < 0.005 0.01 — 0.01 0.01 — 0.01 — 256 256 0.03 < 0.005 — 257 Water — — — — — — — — — — — 0.98 2.44 3.42 0.10 < 0.005 — 6.65 Waste — — — — — — — — — — — 5.16 0.00 5.16 0.52 0.00 — 18.1

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Refrig. — — — — — — — — — — — — — — — — 0.20 0.20
Total 0.59 1.22 0.86 4.02 0.01 0.04 0.29 0.33 0.04 0.05 0.09 6.14 1,383 1,389 0.70 0.04 0.29 1,420 Average
Daily
— — — — — — — — — — — — — — — — — —
Mobile 0.54 0.50 0.43 3.68 0.01 0.01 0.29 0.30 0.01 0.05 0.06 — 837 837 0.04 0.04 1.59 851 Area 0.04 0.73 0.01 0.39 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 0.00 8.32 8.32 < 0.005 < 0.005 — 8.33 Energy 0.02 0.01 0.16 0.07 < 0.005 0.01 — 0.01 0.01 — 0.01 — 256 256 0.03 < 0.005 — 257 Water — — — — — — — — — — — 0.98 2.44 3.42 0.10 < 0.005 — 6.65 Waste — — — — — — — — — — — 5.16 0.00 5.16 0.52 0.00 — 18.1 Refrig. — — — — — — — — — — — — — — — — 0.20 0.20
Total 0.60 1.24 0.61 4.15 0.01 0.02 0.29 0.31 0.02 0.05 0.07 6.14 1,103 1,109 0.69 0.04 1.79 1,141 Annual — — — — — — — — — — — — — — — — — —
Mobile 0.10 0.09 0.08 0.67 < 0.005 < 0.005 0.05 0.05 < 0.005 0.01 0.01 — 138 138 0.01 0.01 0.26 141 Area 0.01 0.13 < 0.005 0.07 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 0.00 1.38 1.38 < 0.005 < 0.005 — 1.38 Energy < 0.005 < 0.005 0.03 0.01 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 42.3 42.3 < 0.005 < 0.005 — 42.5 Water — — — — — — — — — — — 0.16 0.40 0.57 0.02 < 0.005 — 1.10 Waste — — — — — — — — — — — 0.85 0.00 0.85 0.09 0.00 — 2.99 Refrig. — — — — — — — — — — — — — — — — 0.03 0.03
Total 0.11 0.23 0.11 0.76 < 0.005 < 0.005 0.05 0.06 < 0.005 0.01 0.01 1.02 183 184 0.11 0.01 0.30 189

2.6. Operations Emissions by Sector, Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Sector TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Mobile 0.58 0.54 0.39 4.08 0.01 0.01 0.29 0.30 0.01 0.05 0.06 — 890 890 0.04 0.04 3.68 906 Area 0.10 0.78 0.24 0.89 < 0.005 0.02 — 0.02 0.02 — 0.02 0.00 297 297 0.01 Page 90 of 336 < 0.005 — 297 Clayton Way Concord CE Report Custom Report, 5/18/2023
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Energy 0.02 0.01 0.16 0.07 < 0.005 0.01 — 0.01 0.01 — 0.01 — 256 256 0.03 < 0.005 — 257 Water — — — — — — — — — — — 0.98 2.44 3.42 0.10 < 0.005 — 6.65 Waste — — — — — — — — — — — 5.16 0.00 5.16 0.52 0.00 — 18.1 Refrig. — — — — — — — — — — — — — — — — 0.20 0.20
Total 0.70 1.33 0.80 5.04 0.01 0.04 0.29 0.33 0.04 0.05 0.09 6.14 1,446 1,452 0.69 0.04 3.88 1,485 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Mobile 0.55 0.51 0.46 3.85 0.01 0.01 0.29 0.30 0.01 0.05 0.06 — 830 830 0.05 0.04 0.10 843 Area 0.03 0.70 0.23 0.10 < 0.005 0.02 — 0.02 0.02 — 0.02 0.00 295 295 0.01 < 0.005 — 295 Energy 0.02 0.01 0.16 0.07 < 0.005 0.01 — 0.01 0.01 — 0.01 — 256 256 0.03 < 0.005 — 257 Water — — — — — — — — — — — 0.98 2.44 3.42 0.10 < 0.005 — 6.65 Waste — — — — — — — — — — — 5.16 0.00 5.16 0.52 0.00 — 18.1 Refrig. — — — — — — — — — — — — — — — — 0.20 0.20
Total 0.59 1.22 0.86 4.02 0.01 0.04 0.29 0.33 0.04 0.05 0.09 6.14 1,383 1,389 0.70 0.04 0.29 1,420 Average
Daily
— — — — — — — — — — — — — — — — — —
Mobile 0.54 0.50 0.43 3.68 0.01 0.01 0.29 0.30 0.01 0.05 0.06 — 837 837 0.04 0.04 1.59 851 Area 0.04 0.73 0.01 0.39 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 0.00 8.32 8.32 < 0.005 < 0.005 — 8.33 Energy 0.02 0.01 0.16 0.07 < 0.005 0.01 — 0.01 0.01 — 0.01 — 256 256 0.03 < 0.005 — 257 Water — — — — — — — — — — — 0.98 2.44 3.42 0.10 < 0.005 — 6.65 Waste — — — — — — — — — — — 5.16 0.00 5.16 0.52 0.00 — 18.1 Refrig. — — — — — — — — — — — — — — — — 0.20 0.20
Total 0.60 1.24 0.61 4.15 0.01 0.02 0.29 0.31 0.02 0.05 0.07 6.14 1,103 1,109 0.69 0.04 1.79 1,141 Annual — — — — — — — — — — — — — — — — — —
Mobile 0.10 0.09 0.08 0.67 < 0.005 < 0.005 0.05 0.05 < 0.005 0.01 0.01 — 138 138 0.01 0.01 0.26 141 Area 0.01 0.13 < 0.005 0.07 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 0.00 1.38 1.38 < 0.005 < 0.005 — 1.38 Energy < 0.005 < 0.005 0.03 0.01 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 42.3 42.3 < 0.005 < 0.005 — 42.5 Water — — — — — — — — — — — 0.16 0.40 0.57 0.02 < 0.005 — 1.10

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Waste — — — — — — — — — — — 0.85 0.00 0.85 0.09 0.00 — 2.99 Refrig. — — — — — — — — — — — — — — — — 0.03 0.03
Total 0.11 0.23 0.11 0.76 < 0.005 < 0.005 0.05 0.06 < 0.005 0.01 0.01 1.02 183 184 0.11 0.01 0.30 189

3. Construction Emissions Details

3.1. Demolition (2023) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

2.63 2.21 21.2 18.2 0.03 1.01 — 1.01 0.92 — 0.92 — 3,293 3,293 0.13 0.03 — 3,304 Demolitio
n
— — — — — — 0.32 0.32 — 0.05 0.05 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.05 0.04 0.41 0.35 < 0.005 0.02 — 0.02 0.02 — 0.02 — 63.1 63.1 < 0.005 < 0.005 — 63.4 Demolitio
n
— — — — — — 0.01 0.01 — < 0.005 < 0.005 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — Page 92 of 336 — — — Clayton Way Concord CE Report Custom Report, 5/18/2023
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Off-Road
Equipment

0.01 0.01 0.07 0.06 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 10.5 10.5 < 0.005 < 0.005 — 10.5 Demolitio
n
— — — — — — < 0.005 < 0.005 — < 0.005 < 0.005 — — — — — — — Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.03 0.03 0.03 0.31 0.00 0.00 0.06 0.06 0.00 0.01 0.01 — 62.9 62.9 < 0.005 < 0.005 0.01 63.7 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.03 0.01 0.38 0.17 < 0.005 < 0.005 0.07 0.07 < 0.005 0.02 0.02 — 275 275 0.02 0.04 0.02 289 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 1.22 1.22 < 0.005 < 0.005 < 0.005 1.24 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling < 0.005 < 0.005 0.01 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 — 5.27 5.27 < 0.005 < 0.005 < 0.005 5.54 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.20 0.20 < 0.005 < 0.005 < 0.005 0.20 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 — 0.87 0.87 < 0.005 < 0.005 < 0.005 0.92

3.2. Demolition (2023) - Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — Page 93 of 336 — — — Clayton Way Concord CE Report Custom Report, 5/18/2023
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Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.31 0.31 1.62 17.2 0.03 0.06 — 0.06 0.06 — 0.06 — 2,788 2,788 0.11 0.02 — 2,797 Demolitio
n
— — — — — — 0.32 0.32 — 0.05 0.05 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.01 0.01 0.03 0.33 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 53.5 53.5 < 0.005 < 0.005 — 53.6 Demolitio
n
— — — — — — 0.01 0.01 — < 0.005 < 0.005 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment
< 0.005 < 0.005 0.01 0.06 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 8.85 8.85 < 0.005 < 0.005 — 8.88 Demolitio
n
— — — — — — < 0.005 < 0.005 — < 0.005 < 0.005 — — — — — — — Onsite
truck

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Worker 0.03 0.03 0.03 0.31 0.00 0.00 0.06 0.06 0.00 0.01 0.01 — 62.9 62.9 < 0.005 < 0.005 0.01 63.7 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.03 0.01 0.38 0.17 < 0.005 < 0.005 0.07 0.07 < 0.005 0.02 0.02 — 275 275 0.02 0.04 0.02 289 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 1.22 1.22 < 0.005 < 0.005 < 0.005 1.24 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling < 0.005 < 0.005 0.01 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 — 5.27 5.27 < 0.005 < 0.005 < 0.005 5.54 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.20 0.20 < 0.005 < 0.005 < 0.005 0.20 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 — 0.87 0.87 < 0.005 < 0.005 < 0.005 0.92

3.3. Site Preparation (2023) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

2.31 1.94 18.8 16.9 0.02 0.89 — 0.89 0.82 — 0.82 — 2,540 2,540 0.10 0.02 — 2,548 Dust
From
Material
Movement
— — — — — — 6.55 6.55 — 3.37 3.37 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Page 95 of 336 Clayton Way Concord CE Report Custom Report, 5/18/2023
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Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.10 0.08 0.77 0.69 < 0.005 0.04 — 0.04 0.03 — 0.03 — 104 104 < 0.005 < 0.005 — 105 Dust
From
Material
Movement
— — — — — — 0.27 0.27 — 0.14 0.14 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.02 0.01 0.14 0.13 < 0.005 0.01 — 0.01 0.01 — 0.01 — 17.3 17.3 < 0.005 < 0.005 — 17.3 Dust
From
Material
Movement
— — — — — — 0.05 0.05 — 0.03 0.03 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.04 0.04 0.04 0.41 0.00 0.00 0.08 0.08 0.00 0.02 0.02 — 83.8 83.8 < 0.005 < 0.005 0.01 84.9 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling < 0.005 < 0.005 0.06 0.03 < 0.005 < 0.005 0.01 0.01 < 0.005 < 0.005 < 0.005 — 44.4 44.4 < 0.005 0.01 < 0.005 46.6 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.02 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 3.48 3.48 < 0.005 < 0.005 0.01 3.53 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Page 96 of 336 Clayton Way Concord CE Report Custom Report, 5/18/2023
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Hauling < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 — 1.83 1.83 < 0.005 < 0.005 < 0.005 1.92 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.58 0.58 < 0.005 < 0.005 < 0.005 0.58 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 — 0.30 0.30 < 0.005 < 0.005 < 0.005 0.32

3.4. Site Preparation (2023) - Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.30 0.29 1.63 13.8 0.02 0.06 — 0.06 0.06 — 0.06 — 2,540 2,540 0.10 0.02 — 2,548 Dust
From
Material
Movement
— — — — — — 6.55 6.55 — 3.37 3.37 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.01 0.01 0.07 0.57 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 104 104 < 0.005 < 0.005 — 105 Dust
From
Material
Movement
— — — — — — 0.27 0.27 — 0.14 0.14 — — — — — — —

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Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment
< 0.005 < 0.005 0.01 0.10 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 17.3 17.3 < 0.005 < 0.005 — 17.3 Dust
From
Material
Movement
— — — — — — 0.05 0.05 — 0.03 0.03 — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.04 0.04 0.04 0.41 0.00 0.00 0.08 0.08 0.00 0.02 0.02 — 83.8 83.8 < 0.005 < 0.005 0.01 84.9 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling < 0.005 < 0.005 0.06 0.03 < 0.005 < 0.005 0.01 0.01 < 0.005 < 0.005 < 0.005 — 44.4 44.4 < 0.005 0.01 < 0.005 46.6 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.02 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 3.48 3.48 < 0.005 < 0.005 0.01 3.53 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 — 1.83 1.83 < 0.005 < 0.005 < 0.005 1.92 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.58 0.58 < 0.005 < 0.005 < 0.005 0.58 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 — 0.30 0.30 < 0.005 < 0.005 < 0.005 0.32

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3.5. Grading (2023) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

1.90 1.59 15.2 11.4 0.03 0.67 — 0.67 0.62 — 0.62 — 3,285 3,285 0.13 0.03 — 3,296 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.01 0.01 0.06 0.04 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 12.9 12.9 < 0.005 < 0.005 — 12.9 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment
< 0.005 < 0.005 0.01 0.01 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 2.13 2.13 < 0.005 < 0.005 — 2.14 Onsite
truck

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Worker 0.04 0.04 0.04 0.41 0.00 0.00 0.08 0.08 0.00 0.02 0.02 — 83.8 83.8 < 0.005 < 0.005 0.01 84.9 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.33 0.33 < 0.005 < 0.005 < 0.005 0.34 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.05 0.05 < 0.005 < 0.005 < 0.005 0.06 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

3.6. Grading (2023) - Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.31 0.31 1.62 18.0 0.03 0.06 — 0.06 0.06 — 0.06 — 3,285 3,285 0.13 0.03 — 3,296 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —

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Off-Road < 0.005 < 0.005 0.01 0.07 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 12.9 12.9 < 0.005 < 0.005 — 12.9 Equipment
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment
< 0.005 < 0.005 < 0.005 0.01 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 2.13 2.13 < 0.005 < 0.005 — 2.14 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.04 0.04 0.04 0.41 0.00 0.00 0.08 0.08 0.00 0.02 0.02 — 83.8 83.8 < 0.005 < 0.005 0.01 84.9 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.33 0.33 < 0.005 < 0.005 < 0.005 0.34 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.05 0.05 < 0.005 < 0.005 < 0.005 0.06 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

3.7. Grading (2024) - Unmitigated

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Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

1.80 1.51 13.8 11.3 0.03 0.61 — 0.61 0.56 — 0.56 — 3,285 3,285 0.13 0.03 — 3,296 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.05 0.04 0.35 0.29 < 0.005 0.02 — 0.02 0.01 — 0.01 — 83.6 83.6 < 0.005 < 0.005 — 83.9 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.01 0.01 0.06 0.05 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 13.8 13.8 < 0.005 < 0.005 — 13.9 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.04 0.04 0.03 0.38 0.00 0.00 0.08 0.08 0.00 0.02 0.02 — 82.2 82.2 < 0.005 < 0.005 0.01 83.3 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 Page 102 of 336 0.00 0.00 0.00 Clayton Way Concord CE Report Custom Report, 5/18/2023
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Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 2.11 2.11 < 0.005 < 0.005 < 0.005 2.15 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.35 0.35 < 0.005 < 0.005 < 0.005 0.36 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

3.8. Grading (2024) - Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.31 0.31 1.62 18.0 0.03 0.06 — 0.06 0.06 — 0.06 — 3,285 3,285 0.13 0.03 — 3,296 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.01 0.01 0.04 0.46 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 83.6 83.6 < 0.005 < 0.005 — 83.9 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Page 103 of 336 Clayton Way Concord CE Report Custom Report, 5/18/2023
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Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment
< 0.005 < 0.005 0.01 0.08 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 13.8 13.8 < 0.005 < 0.005 — 13.9 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.04 0.04 0.03 0.38 0.00 0.00 0.08 0.08 0.00 0.02 0.02 — 82.2 82.2 < 0.005 < 0.005 0.01 83.3 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 2.11 2.11 < 0.005 < 0.005 < 0.005 2.15 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.35 0.35 < 0.005 < 0.005 < 0.005 0.36 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

3.9. Building Construction (2024) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —

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Daily, — — — — — — — — — — — — — — — — — —
Summer
(Max)
Off-Road
Equipment

0.99 0.83 7.53 7.67 0.02 0.31 — 0.31 0.29 — 0.29 — 1,584 1,584 0.06 0.01 — 1,590 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.99 0.83 7.53 7.67 0.02 0.31 — 0.31 0.29 — 0.29 — 1,584 1,584 0.06 0.01 — 1,590 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.41 0.34 3.13 3.19 0.01 0.13 — 0.13 0.12 — 0.12 — 660 660 0.03 0.01 — 662 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.08 0.06 0.57 0.58 < 0.005 0.02 — 0.02 0.02 — 0.02 — 109 109 < 0.005 < 0.005 — 110 Onsite
truck

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Daily, — — — — — — — — — — — — — — — — — —
Winter
(Max)
Worker 0.02 0.02 0.02 0.19 0.00 0.00 0.04 0.04 0.00 0.01 0.01 — 41.4 41.4 < 0.005 < 0.005 < 0.005 42.0 Vendor < 0.005 < 0.005 0.06 0.03 < 0.005 < 0.005 0.01 0.01 < 0.005 < 0.005 < 0.005 — 41.0 41.0 < 0.005 0.01 < 0.005 42.9 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker 0.01 0.01 0.01 0.08 0.00 0.00 0.02 0.02 0.00 < 0.005 < 0.005 — 17.4 17.4 < 0.005 < 0.005 0.03 17.7 Vendor < 0.005 < 0.005 0.02 0.01 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 — 17.1 17.1 < 0.005 < 0.005 0.02 17.9 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 2.89 2.89 < 0.005 < 0.005 0.01 2.93 Vendor < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 — 2.83 2.83 < 0.005 < 0.005 < 0.005 2.96 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

3.10. Building Construction (2024) - Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.27 0.25 2.43 9.14 0.02 0.06 — 0.06 0.06 — 0.06 — 1,584 1,584 0.06 0.01 — 1,590 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —

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Off-Road
Equipment

0.27 0.25 2.43 9.14 0.02 0.06 — 0.06 0.06 — 0.06 — 1,584 1,584 0.06 0.01 — 1,590 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.11 0.11 1.01 3.81 0.01 0.03 — 0.03 0.02 — 0.02 — 660 660 0.03 0.01 — 662 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.02 0.02 0.18 0.69 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 109 109 < 0.005 < 0.005 — 110 Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.02 0.02 0.01 0.23 0.00 0.00 0.04 0.04 0.00 0.01 0.01 — 45.3 45.3 < 0.005 < 0.005 0.19 46.0 Vendor < 0.005 < 0.005 0.06 0.03 < 0.005 < 0.005 0.01 0.01 < 0.005 < 0.005 < 0.005 — 41.0 41.0 < 0.005 0.01 0.11 43.0 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.02 0.02 0.02 0.19 0.00 0.00 0.04 0.04 0.00 0.01 0.01 — 41.4 41.4 < 0.005 < 0.005 < 0.005 42.0 Vendor < 0.005 < 0.005 0.06 0.03 < 0.005 < 0.005 0.01 0.01 < 0.005 < 0.005 < 0.005 — 41.0 41.0 < 0.005 0.01 < 0.005 42.9 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker 0.01 0.01 0.01 0.08 0.00 0.00 0.02 0.02 0.00 < 0.005 < 0.005 — 17.4 17.4 < 0.005 < 0.005 0.03 17.7 Vendor < 0.005 < 0.005 0.02 0.01 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 — 17.1 17.1 < 0.005 < 0.005 0.02 17.9 Page 107 of 336 Clayton Way Concord CE Report Custom Report, 5/18/2023
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Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 2.89 2.89 < 0.005 < 0.005 0.01 2.93 Vendor < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 — 2.83 2.83 < 0.005 < 0.005 < 0.005 2.96 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

3.11. Paving (2024) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

1.11 0.93 8.27 13.1 0.03 0.33 — 0.33 0.31 — 0.31 — 3,599 3,599 0.15 0.03 — 3,612 Paving — 0.00 — — — — — — — — — — — — — — — —
Onsite
truck

0.02 0.01 0.11 0.18 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 49.3 49.3 < 0.005 < 0.005 — 49.5 Paving — 0.00 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment
< 0.005 < 0.005 0.02 0.03 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 8.16 8.16 < 0.005 < 0.005 — 8.19 Page 108 of 336 Clayton Way Concord CE Report Custom Report, 5/18/2023
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Paving — 0.00 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.05 0.05 0.03 0.56 0.00 0.00 0.10 0.10 0.00 0.02 0.02 — 112 112 < 0.005 < 0.005 0.47 114 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Average
Daily
— — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 1.42 1.42 < 0.005 < 0.005 < 0.005 1.44 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.24 0.24 < 0.005 < 0.005 < 0.005 0.24 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

3.12. Paving (2024) - Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —

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Off-Road
Equipment

0.34 0.34 1.77 21.2 0.03 0.07 — 0.07 0.07 — 0.07 — 3,044 3,044 0.12 0.02 — 3,055 Paving — 0.00 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment
< 0.005 < 0.005 0.02 0.29 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 41.7 41.7 < 0.005 < 0.005 — 41.8 Paving — 0.00 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment
< 0.005 < 0.005 < 0.005 0.05 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 6.90 6.90 < 0.005 < 0.005 — 6.93 Paving — 0.00 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.05 0.05 0.03 0.56 0.00 0.00 0.10 0.10 0.00 0.02 0.02 — 112 112 < 0.005 < 0.005 0.47 114 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Average
Daily
— — — — — — — — — — — — — — — Page 110 of 336 — — —
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Worker < 0.005 < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 1.42 1.42 < 0.005 < 0.005 < 0.005 1.44 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.24 0.24 < 0.005 < 0.005 < 0.005 0.24 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

3.13. Architectural Coating (2024) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.17 0.14 0.91 1.15 < 0.005 0.03 — 0.03 0.03 — 0.03 — 134 134 0.01 < 0.005 — 134 Architect
ural
Coatings
— 42.7 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment
< 0.005 < 0.005 0.02 0.03 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 3.29 3.29 < 0.005 < 0.005 — 3.30 Architect
ural
Coatings
— 1.05 — — — — — — — — — — — — — — — —

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Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.05 0.00 0.00 0.01 0.01 0.00 < 0.005 < 0.005 — 9.06 9.06 < 0.005 < 0.005 0.04 9.20 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Average
Daily
— — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.21 0.21 < 0.005 < 0.005 < 0.005 0.21 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.03 0.03 < 0.005 < 0.005 < 0.005 0.03 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

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Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Onsite — — — — — — — — — — — — — — — — — —
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment

0.02 0.02 0.65 0.96 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 134 134 0.01 < 0.005 — 134 Architect
ural
Coatings
— 42.7 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Road
Equipment
< 0.005 < 0.005 0.02 0.02 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 3.29 3.29 < 0.005 < 0.005 — 3.30 Architect
ural
Coatings
— 1.05 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Off-Road
Equipment
< 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 0.55 0.55 < 0.005 < 0.005 — 0.55 Architect
ural
Coatings
— 0.19 — — — — — — — — — — — — — — — —
Onsite
truck

0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Offsite — — — — — — — — — — — — — — — Page 113 of 336 — — — Clayton Way Concord CE Report Custom Report, 5/18/2023
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Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.05 0.00 0.00 0.01 0.01 0.00 < 0.005 < 0.005 — 9.06 9.06 < 0.005 < 0.005 0.04 9.20 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Average
Daily
— — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.21 0.21 < 0.005 < 0.005 < 0.005 0.21 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 — 0.03 0.03 < 0.005 < 0.005 < 0.005 0.03 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 0.00 0.00 0.00 0.00

4. Operations Emissions Details

4.1. Mobile Emissions by Land Use

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

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Single
Family
Housing

0.58 0.54 0.39 4.08 0.01 0.01 0.29 0.30 0.01 0.05 0.06 — 890 890 0.04 0.04 3.68 906 Total 0.58 0.54 0.39 4.08 0.01 0.01 0.29 0.30 0.01 0.05 0.06 — 890 890 0.04 0.04 3.68 906 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing

0.55 0.51 0.46 3.85 0.01 0.01 0.29 0.30 0.01 0.05 0.06 — 830 830 0.05 0.04 0.10 843 Total 0.55 0.51 0.46 3.85 0.01 0.01 0.29 0.30 0.01 0.05 0.06 — 830 830 0.05 0.04 0.10 843 Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing

0.10 0.09 0.08 0.67 < 0.005 < 0.005 0.05 0.05 < 0.005 0.01 0.01 — 138 138 0.01 0.01 0.26 141 Total 0.10 0.09 0.08 0.67 < 0.005 < 0.005 0.05 0.05 < 0.005 0.01 0.01 — 138 138 0.01 0.01 0.26 141

4.1.2. Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing

0.55 0.51 0.46 3.85 0.01 0.01 0.29 0.30 0.01 0.05 0.06 — 830 830 0.05 0.04 0.10 843

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Total 0.55 0.51 0.46 3.85 0.01 0.01 0.29 0.30 0.01 0.05 0.06 — 830 830 0.05 0.04 0.10 843 Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing

0.10 0.09 0.08 0.67 < 0.005 < 0.005 0.05 0.05 < 0.005 0.01 0.01 — 138 138 0.01 0.01 0.26 141 Total 0.10 0.09 0.08 0.67 < 0.005 < 0.005 0.05 0.05 < 0.005 0.01 0.01 — 138 138 0.01 0.01 0.26 141

4.2. Energy

4.2.1. Electricity Emissions By Land Use - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — 48.4 48.4 0.01 < 0.005 — 48.9
Total — — — — — — — — — — — — 48.4 48.4 0.01 < 0.005 — 48.9 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — 48.4 48.4 0.01 < 0.005 — 48.9
Total — — — — — — — — — — — — 48.4 48.4 0.01 < 0.005 — 48.9 Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — 8.01 8.01 < 0.005 < 0.005 — 8.09 Total — — — — — — — — — — — — 8.01 8.01 < 0.005 < 0.005 — 8.09 Page 116 of 336 Clayton Way Concord CE Report Custom Report, 5/18/2023
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4.2.2. Electricity Emissions By Land Use - Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — 48.4 48.4 0.01 < 0.005 — 48.9
Total — — — — — — — — — — — — 48.4 48.4 0.01 < 0.005 — 48.9 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — 48.4 48.4 0.01 < 0.005 — 48.9
Total — — — — — — — — — — — — 48.4 48.4 0.01 < 0.005 — 48.9 Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — 8.01 8.01 < 0.005 < 0.005 — 8.09 Total — — — — — — — — — — — — 8.01 8.01 < 0.005 < 0.005 — 8.09

4.2.3. Natural Gas Emissions By Land Use - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —

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Single 0.02 0.01 0.16 0.07 < 0.005 0.01 — 0.01 0.01 — 0.01 — 207 207 0.02 < 0.005 — 208 Family
Housing
Total 0.02 0.01 0.16 0.07 < 0.005 0.01 — 0.01 0.01 — 0.01 — 207 207 0.02 < 0.005 — 208 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing

0.02 0.01 0.16 0.07 < 0.005 0.01 — 0.01 0.01 — 0.01 — 207 207 0.02 < 0.005 — 208 Total 0.02 0.01 0.16 0.07 < 0.005 0.01 — 0.01 0.01 — 0.01 — 207 207 0.02 < 0.005 — 208 Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
< 0.005 < 0.005 0.03 0.01 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 34.3 34.3 < 0.005 < 0.005 — 34.4 Total < 0.005 < 0.005 0.03 0.01 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 34.3 34.3 < 0.005 < 0.005 — 34.4

4.2.4. Natural Gas Emissions By Land Use - Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing

0.02 0.01 0.16 0.07 < 0.005 0.01 — 0.01 0.01 — 0.01 — 207 207 0.02 < 0.005 — 208 Total 0.02 0.01 0.16 0.07 < 0.005 0.01 — 0.01 0.01 — 0.01 — 207 207 0.02 < 0.005 — 208 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing

0.02 0.01 0.16 0.07 < 0.005 0.01 — 0.01 0.01 — 0.01 — 207 207 0.02 < 0.005 — 208

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Total 0.02 0.01 0.16 0.07 < 0.005 0.01 — 0.01 0.01 — 0.01 — 207 207 0.02 < 0.005 — 208 Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
< 0.005 < 0.005 0.03 0.01 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 34.3 34.3 < 0.005 < 0.005 — 34.4 Total < 0.005 < 0.005 0.03 0.01 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 34.3 34.3 < 0.005 < 0.005 — 34.4

4.3. Area Emissions by Source

4.3.2. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Source TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Hearths 0.03 0.01 0.23 0.10 < 0.005 0.02 — 0.02 0.02 — 0.02 0.00 295 295 0.01 < 0.005 — 295 Consum
er
Products
— 0.58 — — — — — — — — — — — — — — — —
Architect
ural
Coatings
— 0.11 — — — — — — — — — — — — — — — —
Landsca
pe
Equipme
nt

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Consum — 0.58 — — — — — — — — — — — — — — — —
er
Products
Architect
ural
Coatings
— 0.11 — — — — — — — — — — — — — — — —
Total 0.03 0.70 0.23 0.10 < 0.005 0.02 — 0.02 0.02 — 0.02 0.00 295 295 0.01 < 0.005 — 295 Annual — — — — — — — — — — — — — — — — — —
Hearths < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 0.00 1.20 1.20 < 0.005 < 0.005 — 1.20 Consum
er
Products
— 0.11 — — — — — — — — — — — — — — — —
Architect
ural
Coatings
— 0.02 — — — — — — — — — — — — — — — —
Landsca
pe
Equipme
nt

0.01 0.01 < 0.005 0.07 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 0.17 0.17 < 0.005 < 0.005 — 0.17 Total 0.01 0.13 < 0.005 0.07 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 0.00 1.38 1.38 < 0.005 < 0.005 — 1.38

4.3.1. Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Source TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Hearths 0.03 0.01 0.23 0.10 < 0.005 0.02 — 0.02 0.02 — 0.02 0.00 295 295 0.01 < 0.005 — 295 Consum
er
Products
— 0.58 — — — — — — — — — — — — — — — —
Architect
ural
Coatings
— 0.11 — — — — — — — — — — — — — — — —

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Landsca
Equipment

0.08 0.07 0.01 0.79 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 — 2.12 2.12 < 0.005 < 0.005 — 2.13 Total 0.10 0.78 0.24 0.89 < 0.005 0.02 — 0.02 0.02 — 0.02 0.00 297 297 0.01 < 0.005 — 297 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Hearths 0.03 0.01 0.23 0.10 < 0.005 0.02 — 0.02 0.02 — 0.02 0.00 295 295 0.01 < 0.005 — 295 Consum
er
Products
— 0.58 — — — — — — — — — — — — — — — —
Architect
ural
Coatings
— 0.11 — — — — — — — — — — — — — — — —
Total 0.03 0.70 0.23 0.10 < 0.005 0.02 — 0.02 0.02 — 0.02 0.00 295 295 0.01 < 0.005 — 295 Annual — — — — — — — — — — — — — — — — — —
Hearths < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 0.00 1.20 1.20 < 0.005 < 0.005 — 1.20 Consum
er
Products
— 0.11 — — — — — — — — — — — — — — — —
Architect
ural
Coatings
— 0.02 — — — — — — — — — — — — — — — —
Landsca
pe
Equipme
nt

4.4. Water Emissions by Land Use

4.4.2. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual)

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Land TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Use
Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 0.98 2.44 3.42 0.10 < 0.005 — 6.65 Total — — — — — — — — — — — 0.98 2.44 3.42 0.10 < 0.005 — 6.65 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 0.98 2.44 3.42 0.10 < 0.005 — 6.65 Total — — — — — — — — — — — 0.98 2.44 3.42 0.10 < 0.005 — 6.65 Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 0.16 0.40 0.57 0.02 < 0.005 — 1.10 Total — — — — — — — — — — — 0.16 0.40 0.57 0.02 < 0.005 — 1.10

4.4.1. Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 0.98 2.44 3.42 0.10 < 0.005 — 6.65 Total — — — — — — — — — — — 0.98 2.44 3.42 0.10 Page 122 of 336 < 0.005 — 6.65 Clayton Way Concord CE Report Custom Report, 5/18/2023
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Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 0.98 2.44 3.42 0.10 < 0.005 — 6.65 Total — — — — — — — — — — — 0.98 2.44 3.42 0.10 < 0.005 — 6.65 Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 0.16 0.40 0.57 0.02 < 0.005 — 1.10 Total — — — — — — — — — — — 0.16 0.40 0.57 0.02 < 0.005 — 1.10

4.5. Waste Emissions by Land Use

4.5.2. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 5.16 0.00 5.16 0.52 0.00 — 18.1
Total — — — — — — — — — — — 5.16 0.00 5.16 0.52 0.00 — 18.1 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 5.16 0.00 5.16 0.52 0.00 — 18.1
Total — — — — — — — — — — — 5.16 0.00 5.16 0.52 Page 123 of 336 0.00 — 18.1 Clayton Way Concord CE Report Custom Report, 5/18/2023
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Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 0.85 0.00 0.85 0.09 0.00 — 2.99
Total — — — — — — — — — — — 0.85 0.00 0.85 0.09 0.00 — 2.99

4.5.1. Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 5.16 0.00 5.16 0.52 0.00 — 18.1
Total — — — — — — — — — — — 5.16 0.00 5.16 0.52 0.00 — 18.1 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 5.16 0.00 5.16 0.52 0.00 — 18.1
Total — — — — — — — — — — — 5.16 0.00 5.16 0.52 0.00 — 18.1 Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — 0.85 0.00 0.85 0.09 0.00 — 2.99
Total — — — — — — — — — — — 0.85 0.00 0.85 0.09 0.00 — 2.99

4.6. Refrigerant Emissions by Land Use

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4.6.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — — — — — 0.20 0.20
Total — — — — — — — — — — — — — — — — 0.20 0.20
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — — — — — 0.20 0.20
Total — — — — — — — — — — — — — — — — 0.20 0.20
Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — — — — — 0.03 0.03
Total — — — — — — — — — — — — — — — — 0.03 0.03

4.6.2. Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —

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Single — — — — — — — — — — — — — — — — 0.20 0.20
Family
Housing
Total — — — — — — — — — — — — — — — — 0.20 0.20
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — — — — — 0.20 0.20
Total — — — — — — — — — — — — — — — — 0.20 0.20
Annual — — — — — — — — — — — — — — — — — —
Single
Family
Housing
— — — — — — — — — — — — — — — — 0.03 0.03
Total — — — — — — — — — — — — — — — — 0.03 0.03

4.7. Offroad Emissions By Equipment Type

4.7.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipme
nt
Type
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —

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Total — — — — — — — — — — — — — — — — — —

4.7.2. Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipme
nt
Type
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.8. Stationary Emissions By Equipment Type

4.8.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipme
nt
Type
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —

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Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.8.2. Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipme
nt
Type
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.9. User Defined Emissions By Equipment Type

4.9.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipme
nt
Type
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
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Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.9.2. Mitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Equipme
nt
Type
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.10. Soil Carbon Accumulation By Vegetation Type

4.10.1. Soil Carbon Accumulation By Vegetation Type - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Vegetatio
n
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e

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Daily, — — — — — — — — — — — — — — — — — —
Summer
(Max)
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.10.2. Above and Belowground Carbon Accumulation by Land Use Type - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.10.3. Avoided and Sequestered Emissions by Species - Unmitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Species TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e

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Daily,——————————————————
Summer
(Max)
Avoided——————————————————
Subtotal——————————————————
Sequest
ered
——————————————————
Subtotal——————————————————
Remove d——————————————————
Subtotal——————————————————
———————————————————
Daily,
Winter
(Max)
——————————————————
Avoided——————————————————
Subtotal——————————————————
Sequest
ered
——————————————————
Subtotal——————————————————
Remove d——————————————————
Subtotal——————————————————
———————————————————
Annual——————————————————
Avoided——————————————————
Subtotal——————————————————
Sequest
ered
——————————————————
Subtotal——————————————————

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Remove — — — — — — — — — — — — — — — — — —
d
Subtotal — — — — — — — — — — — — — — — — — —
— — — — — — — — — — — — — — — — — — —

4.10.4. Soil Carbon Accumulation By Vegetation Type - Mitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Vegetatio
n
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.10.5. Above and Belowground Carbon Accumulation by Land Use Type - Mitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —

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Total — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Total — — — — — — — — — — — — — — — — — —

4.10.6. Avoided and Sequestered Emissions by Species - Mitigated Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Species TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Avoided — — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Sequest
ered
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Remove
d
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
— — — — — — — — — — — — — — — — — — —
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Avoided — — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Sequest
ered
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Remove
d
— — — — — — — — — — — — — — — — — —
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— — — — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Avoided — — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Sequest
ered
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
Remove
d
— — — — — — — — — — — — — — — — — —
Subtotal — — — — — — — — — — — — — — — — — —
— — — — — — — — — — — — — — — — — — —

5. Activity Data

5.1. Construction Schedule
Phase Name Phase Type Start Date End Date Days Per Week Work Days per Phase Phase Description Demolition Demolition 12/1/2023 12/11/2023 5.00 7.00 —
Site Preparation Site Preparation 12/9/2023 12/30/2023 5.00 15.0 — Grading Grading 12/30/2023 1/13/2024 5.00 10.0 —
Building Construction Building Construction 1/13/2024 8/13/2024 5.00 152 — Paving Paving 8/13/2024 8/19/2024 5.00 5.00 —
Architectural Coating Architectural Coating 8/20/2024 8/31/2024 5.00 9.00 —

5.2. Off-Road Equipment

5.2.1. Unmitigated
Phase Name Equipment Type Fuel Type Engine Tier Number per Day Hours Per Day Horsepower Load Factor Page 134 of 336 Clayton Way Concord CE Report Custom Report, 5/18/2023
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Demolition Rubber Tired Dozers Diesel Average 1.00 8.00 500 0.40 Demolition Rubber Tired Loaders Diesel Average 1.00 8.00 75.0 0.73 Demolition Excavators Diesel Average 1.00 8.00 257 0.38 Site Preparation Rubber Tired Dozers Diesel Average 1.00 8.00 500 0.40 Site Preparation Tractors/Loaders/Backh
oes
Diesel Average 1.00 8.00 104 0.37
Site Preparation Cement and Mortar
Mixers
Diesel Average 1.00 8.00 10.0 0.56
Site Preparation Rubber Tired Loaders Diesel Average 1.00 8.00 75.0 0.36 Grading Plate Compactors Diesel Average 1.00 8.00 275 0.41 Grading Graders Diesel Average 1.00 8.00 140 0.38
Grading Scrapers Diesel Average 1.00 8.00 394 0.37
Grading Rubber Tired Dozers Diesel Average 1.00 8.00 104 0.40 Building Construction Cranes Diesel Average 1.00 7.00 367 0.29 Building Construction Forklifts Diesel Average 1.00 8.00 82.0 0.20 Building Construction Generator Sets Diesel Average 1.00 8.00 14.0 0.74 Building Construction Welders Diesel Average 1.00 8.00 46.0 0.45 Building Construction Tractors/Loaders/Backh
oes
Diesel Average 1.00 7.00 84.0 0.37
Paving Tractors/Loaders/Backh
oes
Diesel Average 1.00 8.00 104 0.37
Paving Plate Compactors Diesel Average 1.00 6.00 142 0.56 Paving Rubber Tired Dozers Diesel Average 1.00 8.00 500 0.42 Paving Paving Equipment Diesel Average 1.00 6.00 144 0.36 Paving Graders Diesel Average 1.00 6.00 140 0.38
Architectural Coating Air Compressors Diesel Average 1.00 6.00 37.0 0.48

5.2.2. Mitigated
Phase Name Equipment Type Fuel Type Engine Tier Number per Day Hours Per Day Horsepower Load Factor

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Demolition Rubber Tired Dozers Diesel Tier 4 Final 1.00 8.00 500 0.40 Demolition Rubber Tired Loaders Diesel Tier 4 Final 1.00 8.00 75.0 0.73 Demolition Excavators Diesel Tier 4 Final 1.00 8.00 257 0.38 Site Preparation Rubber Tired Dozers Diesel Tier 4 Final 1.00 8.00 500 0.40 Site Preparation Tractors/Loaders/Backh
oes
Diesel Tier 4 Final 1.00 8.00 104 0.37
Site Preparation Cement and Mortar
Mixers
Diesel Average 1.00 8.00 10.0 0.56
Site Preparation Rubber Tired Loaders Diesel Tier 4 Final 1.00 8.00 75.0 0.36 Grading Plate Compactors Diesel Tier 4 Final 1.00 8.00 275 0.41 Grading Graders Diesel Tier 4 Final 1.00 8.00 140 0.38
Grading Scrapers Diesel Tier 4 Final 1.00 8.00 394 0.37 Grading Rubber Tired Dozers Diesel Tier 4 Final 1.00 8.00 104 0.40 Building Construction Cranes Diesel Tier 4 Final 1.00 7.00 367 0.29 Building Construction Forklifts Diesel Tier 4 Final 1.00 8.00 82.0 0.20 Building Construction Generator Sets Diesel Average 1.00 8.00 14.0 0.74 Building Construction Welders Diesel Tier 4 Final 1.00 8.00 46.0 0.45 Building Construction Tractors/Loaders/Backh
oes
Diesel Tier 4 Final 1.00 7.00 84.0 0.37
Paving Tractors/Loaders/Backh
oes
Diesel Tier 4 Final 1.00 8.00 104 0.37
Paving Plate Compactors Diesel Tier 4 Final 1.00 6.00 142 0.56 Paving Rubber Tired Dozers Diesel Tier 4 Final 1.00 8.00 500 0.42 Paving Paving Equipment Diesel Tier 4 Final 1.00 6.00 144 0.36 Paving Graders Diesel Tier 4 Final 1.00 6.00 140 0.38
Architectural Coating Air Compressors Diesel Tier 4 Final 1.00 6.00 37.0 0.48

5.3. Construction Vehicles

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5.3.1. Unmitigated
Phase Name Trip Type One-Way Trips per Day Miles per Trip Vehicle Mix Demolition — — — —
Demolition Worker 7.50 11.7 LDA,LDT1,LDT2
Demolition Vendor 0.00 8.40 HHDT,MHDT
Demolition Hauling 3.71 20.0 HHDT
Demolition Onsite truck 0.00 — HHDT
Site Preparation — — — —
Site Preparation Worker 10.0 11.7 LDA,LDT1,LDT2
Site Preparation Vendor 0.00 8.40 HHDT,MHDT
Site Preparation Hauling 0.60 20.0 HHDT
Site Preparation Onsite truck 0.00 — HHDT
Grading — — — —
Grading Worker 10.0 11.7 LDA,LDT1,LDT2
Grading Vendor 0.00 8.40 HHDT,MHDT
Grading Hauling 0.00 20.0 HHDT
Grading Onsite truck 0.00 — HHDT
Building Construction — — — —
Building Construction Worker 5.04 11.7 LDA,LDT1,LDT2
Building Construction Vendor 1.50 8.40 HHDT,MHDT
Building Construction Hauling 0.00 20.0 HHDT
Building Construction Onsite truck 0.00 — HHDT
Paving — — — —
Paving Worker 12.5 11.7 LDA,LDT1,LDT2
Paving Vendor 0.00 8.40 HHDT,MHDT
Paving Hauling 0.00 20.0 HHDT
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Architectural Coating — — — —
Architectural Coating Worker 1.01 11.7 LDA,LDT1,LDT2
Architectural Coating Vendor 0.00 8.40 HHDT,MHDT
Architectural Coating Hauling 0.00 20.0 HHDT
Architectural Coating Onsite truck 0.00 — HHDT

5.3.2. Mitigated
Phase Name Trip Type One-Way Trips per Day Miles per Trip Vehicle Mix Demolition — — — —
Demolition Worker 7.50 11.7 LDA,LDT1,LDT2
Demolition Vendor 0.00 8.40 HHDT,MHDT
Demolition Hauling 3.71 20.0 HHDT
Demolition Onsite truck 0.00 — HHDT
Site Preparation — — — —
Site Preparation Worker 10.0 11.7 LDA,LDT1,LDT2
Site Preparation Vendor 0.00 8.40 HHDT,MHDT
Site Preparation Hauling 0.60 20.0 HHDT
Site Preparation Onsite truck 0.00 — HHDT
Grading — — — —
Grading Worker 10.0 11.7 LDA,LDT1,LDT2
Grading Vendor 0.00 8.40 HHDT,MHDT
Grading Hauling 0.00 20.0 HHDT
Grading Onsite truck 0.00 — HHDT
Building Construction — — — —
Building Construction Worker 5.04 11.7 LDA,LDT1,LDT2
Building Construction Vendor 1.50 8.40 HHDT,MHDT
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Building Construction Onsite truck 0.00 — HHDT
Paving — — — —
Paving Worker 12.5 11.7 LDA,LDT1,LDT2
Paving Vendor 0.00 8.40 HHDT,MHDT
Paving Hauling 0.00 20.0 HHDT
Paving Onsite truck 0.00 — HHDT
Architectural Coating — — — —
Architectural Coating Worker 1.01 11.7 LDA,LDT1,LDT2
Architectural Coating Vendor 0.00 8.40 HHDT,MHDT
Architectural Coating Hauling 0.00 20.0 HHDT
Architectural Coating Onsite truck 0.00 — HHDT

5.4. Vehicles

5.4.1. Construction Vehicle Control Strategies
Control Strategies Applied PM10 Reduction PM2.5 Reduction Water unpaved roads twice daily 55% 55%

5.5. Architectural Coatings
Phase Name Residential Interior Area Coated
(sq ft)
Residential Exterior Area Coated
(sq ft)
Non-Residential Interior Area
Coated (sq ft)
Non-Residential Exterior Area
Coated (sq ft)
Parking Area Coated (sq ft)
Architectural Coating 55,283 18,428 0.00 0.00 —

5.6. Dust Mitigation

5.6.1. Construction Earthmoving Activities

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Phase Name Material Imported (Cubic Yards) Material Exported (Cubic Yards) Acres Graded (acres) Material Demolished (Building Acres Paved (acres) Square Footage)
Demolition 0.00 0.00 0.00 2,200 —
Site Preparation 72.0 0.00 22.5 0.00 —
Paving 0.00 0.00 0.00 0.00 0.15

5.6.2. Construction Earthmoving Control Strategies
Non-applicable. No control strategies activated by user.

5.7. Construction Paving
Land Use Area Paved (acres) % Asphalt
Single Family Housing 0.15 0%

5.8. Construction Electricity Consumption and Emissions Factors kWh per Year and Emission Factor (lb/MWh)
Year kWh per Year CO2 CH4 N2O
2023 0.00 204 0.03 < 0.005
2024 0.00 204 0.03 < 0.005

5.9. Operational Mobile Sources

5.9.1. Unmitigated
Land Use Type Trips/Weekday Trips/Saturday Trips/Sunday Trips/Year VMT/Weekday VMT/Saturday VMT/Sunday VMT/Year Single Family
Housing
134 134 134 48,749 1,066 1,066 1,066 389,020

5.9.2. Mitigated

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Land Use Type Trips/Weekday Trips/Saturday Trips/Sunday Trips/Year VMT/Weekday VMT/Saturday VMT/Sunday VMT/Year Single Family
Housing
134 134 134 48,749 1,066 1,066 1,066 389,020

5.10. Operational Area Sources

5.10.1. Hearths

5.10.1.1. Unmitigated
Hearth Type Unmitigated (number)
Single Family Housing —
Wood Fireplaces 0
Gas Fireplaces 14
Propane Fireplaces 0
Electric Fireplaces 0
No Fireplaces 0
Conventional Wood Stoves 0
Catalytic Wood Stoves 0
Non-Catalytic Wood Stoves 0
Pellet Wood Stoves 0

5.10.1.2. Mitigated
Hearth Type Unmitigated (number)
Single Family Housing —
Wood Fireplaces 0
Gas Fireplaces 14
Propane Fireplaces 0
Electric Fireplaces 0

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No Fireplaces 0
Conventional Wood Stoves 0
Catalytic Wood Stoves 0
Non-Catalytic Wood Stoves 0
Pellet Wood Stoves 0

5.10.2. Architectural Coatings
Residential Interior Area Coated (sq ft) Residential Exterior Area Coated (sq ft) Non-Residential Interior Area Coated (sq ft)
Non-Residential Exterior Area Coated
(sq ft)
Parking Area Coated (sq ft)
55282.5 18,428 0.00 0.00 —

5.10.3. Landscape Equipment
Season Unit Value
Snow Days day/yr 0.00
Summer Days day/yr 180

5.10.4. Landscape Equipment - Mitigated
Season Unit Value
Snow Days day/yr 0.00
Summer Days day/yr 180

5.11. Operational Energy Consumption

5.11.1. Unmitigated
Electricity (kWh/yr) and CO2 and CH4 and N2O and Natural Gas (kBTU/yr) Land Use Electricity (kWh/yr) CO2 CH4 N2O Natural Gas (kBTU/yr) Single Family Housing 86,588 204 0.0330 0.0040 647,107

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5.11.2. Mitigated
Electricity (kWh/yr) and CO2 and CH4 and N2O and Natural Gas (kBTU/yr) Land Use Electricity (kWh/yr) CO2 CH4 N2O Natural Gas (kBTU/yr) Single Family Housing 86,588 204 0.0330 0.0040 647,107

5.12. Operational Water and Wastewater Consumption

5.12.1. Unmitigated
Land Use Indoor Water (gal/year) Outdoor Water (gal/year) Single Family Housing 509,493 217,250

5.12.2. Mitigated
Land Use Indoor Water (gal/year) Outdoor Water (gal/year) Single Family Housing 509,493 217,250

5.13. Operational Waste Generation

5.13.1. Unmitigated
Land Use Waste (ton/year) Cogeneration (kWh/year)
Single Family Housing 9.58 —

5.13.2. Mitigated
Land Use Waste (ton/year) Cogeneration (kWh/year)
Single Family Housing 9.58 —

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5.14. Operational Refrigeration and Air Conditioning Equipment

5.14.1. Unmitigated
Land Use Type Equipment Type Refrigerant GWP Quantity (kg) Operations Leak Rate Service Leak Rate Times Serviced Single Family Housing Average room A/C &
Other residential A/C
and heat pumps
R-410A 2,088 < 0.005 2.50 2.50 10.0
Single Family Housing Household refrigerators
and/or freezers
R-134a 1,430 0.12 0.60 0.00 1.00

5.14.2. Mitigated
Land Use Type Equipment Type Refrigerant GWP Quantity (kg) Operations Leak Rate Service Leak Rate Times Serviced Single Family Housing Average room A/C &
Other residential A/C
and heat pumps
R-410A 2,088 < 0.005 2.50 2.50 10.0
Single Family Housing Household refrigerators
and/or freezers
R-134a 1,430 0.12 0.60 0.00 1.00

5.15. Operational Off-Road Equipment

5.15.1. Unmitigated
Equipment Type Fuel Type Engine Tier Number per Day Hours Per Day Horsepower Load Factor

5.15.2. Mitigated
Equipment Type Fuel Type Engine Tier Number per Day Hours Per Day Horsepower Load Factor

5.16. Stationary Sources

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5.16.1. Emergency Generators and Fire Pumps
Equipment Type Fuel Type Number per Day Hours per Day Hours per Year Horsepower Load Factor

5.16.2. Process Boilers
Equipment Type Fuel Type Number Boiler Rating (MMBtu/hr) Daily Heat Input (MMBtu/day) Annual Heat Input (MMBtu/yr)

5.17. User Defined
Equipment Type Fuel Type
— —

5.18. Vegetation

5.18.1. Land Use Change

5.18.1.1. Unmitigated
Vegetation Land Use Type Vegetation Soil Type Initial Acres Final Acres

5.18.1.2. Mitigated
Vegetation Land Use Type Vegetation Soil Type Initial Acres Final Acres

5.18.1. Biomass Cover Type

5.18.1.1. Unmitigated
Biomass Cover Type Initial Acres Final Acres

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5.18.1.2. Mitigated
Biomass Cover Type Initial Acres Final Acres

5.18.2. Sequestration

5.18.2.1. Unmitigated
Tree Type Number Electricity Saved (kWh/year) Natural Gas Saved (btu/year)

5.18.2.2. Mitigated
Tree Type Number Electricity Saved (kWh/year) Natural Gas Saved (btu/year)

8. User Changes to Default Data
Screen Justification
Construction: Construction Phases Changes based on applicant provided data request, note that some phases may be concurrent rather than consecutive.

Construction: Off-Road Equipment Changes made based on applicant provided data request, specific horsepower for all phases changed based on models the applicant provided in the data request (Construction and architectural coating phase left as defaults due to no info provided).

Construction: Dust From Material Movement Based on applicant provided data request info Operations: Hearths Changes made based on applicant provided data request Land Use Landscape Area provided in project plans
Construction: Off-Road Equipment EF Emissions factors for rubber tired loaders used in demolition phase and compactors used in grading phase would not accept defaults, inputted conservative estimates based on other equipment defaults with similar horsepower
Operations: Vehicle Data Weekday, saturday, and sunday trip generation all changed to be the same to get the most conservative weekend trip calcualations

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Appendix C
Roadway Construction Noise Model Results

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Roadway Construction Noise Model (RCNM),Version 1.1
Report date:########
Case Description: 1836 Claton Way
---- Receptor #1 ----
Baselines (dBA)
DescriptionLand Use Daytime Evening Night
Sorrounding Residential Residential 65 60 55
Equipment
Spec Actual Receptor Estimated
Impact Lmax Lmax Distance Shielding
Description Device Usage(%) (dBA) (dBA) (feet) (dBA)
Dozer No 40 81.7 100 0
Compactor (ground) No 20 83.2 100 0
Grader No 40 85 100 0
Scraper No 40 83.6 100 0
Results
Calculated (dBA) Noise Limits (dBA)
Day Evening Night
Equipment *Lmax Leq Lmax Leq Lmax Leq Lmax
Dozer 75.6 71.7 N/A N/A N/A N/A N/A
Compactor (ground) 77.2 70.2 N/A N/A N/A N/A N/A
Grader 79 75 N/A N/A N/A N/A N/A
Scraper 77.6 73.6 N/A N/A N/A N/A N/A
Total 79 79 N/A N/A N/A N/A N/A
*Calculated Lmax is the Loudest value.

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Noise Limit Exceedance (dBA)
Day Evening Night
Leq Lmax Leq Lmax Leq Lmax Leq

N/A N/A N/A N/A N/A N/A N/A

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Appendix D
Stormwater Control Plan

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1836 Clayton Way, Concord Page 1 of 14 January 2023

STORMWATER CONTROL PLAN
for
Darlene Peters
1836 Clayton Way

CONCORD, CALIFORNIA
January 2023
prepared by:

Milani & Associates
2655 Stanwell Drive, Suite 105
Concord, Ca. 94520
(925) 465-2033
Fax (925) 674-9279
[email protected]
Attn: Michael E. Milani
RCE 35121 exp. 09-30-23
QSD 351 exp. 02-17-23

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TABLE OF CONTENTS
I. Project Data ..................................................................................................................4 II. Setting ..........................................................................................................................5 II.A. Project Location and Description ................................................................................................................ 5 II.B. Existing Site Features and Conditions ........................................................................................................ 5 II.C. Opportunities and Constraints for Storm Water Control ....................................................................... 5 III. Low Impact Development Design Strategies ..............................................................5 III.A. Optimization of Site Layout.......................................................................................................................... 5 III.A.1. Limitation of development envelope: 5
III.A.2. Preservation of Natural drainage features: 5
III.A.3. Setbacks from creeks, wetlands and riparian habitats: 6 III.A.4. Minimization of imperviousness: 6
III.A.5. Use of drainage as a design element: 6
III.B. Use of Permeable Pavements ....................................................................................................................... 6 III.C. Dispersal of Runoff to Pervious Areas ....................................................................................................... 6 III.D. Integrated Management Practices ................................................................................................................ 6 IV. Documentation of Drainage Design .............................................................................6 IV.A. Descriptions of each Drainage Management Area ................................................................................... 6 IV.A.1. Table of Drainage Management Areas 6
IV.A.2. Drainage Management Area Descriptions 7
IV.B. Tabulation and Sizing Calculations .............................................................................................................. 8 IV.B.1. Information Summary for IMP Design 8
IV.B.2. Self-Treating Areas 8
IV.B.3. Self-Retaining Areas 8
IV.B.4. Areas Draining to Self-Retaining Areas 8
IV.B.5. Areas Draining to IMPs 8
IV.C. Integrated Management Practice Descriptions .......................................................................................... 8 V. Source Control Measures .............................................................................................9 V.A. Site activities and potential sources of pollutants ...................................................................................... 9 V.B. Source Control Table ..................................................................................................................................... 9 V.C. Features, Materials, and Methods of Construction of Source Control BMPs ................................... 11 VI. Stormwater Facility Maintenance ..............................................................................11 VI.A. Ownership and Responsibility for Maintenance in Perpetuity ............................................................. 11 VI.B. Summary of Maintenance Requirements for Each Storm Water Facility ........................................... 11 VII. Construction Plan C.3 Checklist Table #6 .................................................................12 VIII.Certifications ..............................................................................................................13

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Tables
Table 1. Project Data .......................................................................................................................................... 4 Table 2. Non-LID Treatment Measures ...................................................................................................... 6-7 Table 3. Sources and Source Control Measures ........................................................................................... 10 Table 4. Construction Plan C.3 Checklist ...................................................................................................... 12 Figures
Vicinity Map ...................................................................................................................................................... 14 Attachments
C3 Exhibit
Stormwater Control Plan Exhibit
NRCS Soils Report
NRCS Soils Map
Contra Costa County IMP Calculator Printout.

IMP Detail / Cross-Section

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I. PROJECT DATA
Table 1. Project Data
Project Name/Number 1836 Clayton Way
Application Submittal Date 01-25-2023
Project Location 1836 Clayton Way, Concord, Ca 94519
Name of Developer Darlene Peters
Project Phase No. N/A
Project Type and Description Single Family Residential – 14 lots Project Watershed Walnut Creek Watershed
Total Project Site Area (acres) 1.67 Acres
Total Area of Land Disturbed (acres) 1.67 ac±
Total New Impervious Surface Area (sq. ft.) 39,364 sqft± Total Replaced Impervious Surface Area 2,608 sqft±
Total Pre-Project Impervious Surface Area 4,995 sqft±
Total Post-Project Impervious Surface Area 44,359 sqft± 50% Rule[*] Applies
Project Density F.A.R. = 0.26
Applicable Special Project Categories
[Complete even if all treatment is LID]
N/A
Percent LID and non LID treatment 100% LID
HMP Compliance [†] N/A
[*50% rule applies if:

Total Replaced Impervious Surface Area > 0.5 x Pre-Project Impervious Surface Area] [†HMP applies if:
(Total New Impervious Surface Area + Total Replaced Impervious Surface Area) ≥ 1 acre]

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1836 Clayton Way, Concord Page 5 of 14 January 2023
II. SETTING
II.A. Project Location and Description
General Information:

Address: 1836 Clayton Way, Concord, Ca 94519
APN: 114-220-019-3

The project is located at 1836 Clayton Way in the City of Concord. The site currently consists of a single vacant home, a detached garage, and a shed.

The site is bound by public street, Clayton Way, along the west, and residences along the north, east, and south. Several non-native and native trees and shrubs exist on site.

II.B. Existing Site Features and Conditions
The project is accessed from Clayton Way on the West side. The site is relative flat.

The site topography varies in elevation from 131.4’ to 129.0’ from the southeast corner of the property to the northwest corner of the property. Along the south side of the project is an existing water tank with wellhead. An existing overhead electrical line encroaches onto the property from the west and connects to an existing electrical meter adjacent to the existing residence.

The site is within Quarternary-age, undivided surficial deposits as indicated in the Henry Justiniano & Associates’ preliminary geotechnical report contained in appendix section of this report. The site is also underlain by Pleistocene age, alluvial fan and fluvial deposits. The project is considered to be in Hydrologic group “C” per the Hydrologic Soil Group Map from USDANRCS.

II.C. Opportunities and Constraints for Storm Water Control The relatively flat topography of the site serves as an opportunity for storm water control. There are no additional existing opportunities to aid in providing natural storm water control. The soil make up of the site is of low permeability, which serves as a general constraint for storm water control.

III. LOW IMPACT DEVELOPMENT DESIGN STRATEGIES
III.A. Optimization of Site Layout
III.A.1. Limitation of development envelope:

The development envelope is bordered on three of four sides by existing residential areas. The fourth side borders Clayton Way.

III.A.2. Preservation of Natural drainage features:

The existing project does not have preservable natural features.

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III.A.3. Setbacks from creeks, wetlands and riparian habitats:

The existing and proposed development does not create any additional impact.

III.A.4. Minimization of imperviousness:

The site is designed to incorporate as much landscape as possible.

III.A.5. Use of drainage as a design element:

We are utilizing flow-through planters to capture runoff.

III.B. Use of Permeable Pavements
No permeable pavements are proposed on this project.

III.C. Dispersal of Runoff to Pervious Areas
The proposed site drainage design does not include dispersal of runoff to landscaped areas.

III.D. Integrated Management Practices
Flow-through planters will be integrated with the site layout to treat runoff and infiltrate some runoff prior to discharging into the municipal storm drain.

IV. DOCUMENTATION OF DRAINAGE DESIGN
IV.A. Descriptions of each Drainage Management Area
IMPs are flow-through planters.

See table below for remaining DMA type.

IV.A.1. Table of Drainage Management Areas
Table 3. Drainage Management Areas
DMA Name Treatment Type Surface Type Area (square feet) DMA-1 Drains to IMP-1 Paving 2,005
DMA-2 Drains to IMP-2 Roof 1,925
DMA-3 Drains to IMP-2 Landscape 3,223
DMA-4 Drains to IMP-2 Roof 2,030
DMA-5 Drains to IMP-2 Roof 1,925
DMA-6 Drains to IMP-2 Roof 1,018
DMA-7 Drains to IMP-2 Roof 1,121
DMA-8 Drains to IMP-2 Landscape 7,904

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DMA-9 Drains to IMP-2 Roof 1,121
DMA-10 Drains to IMP-2 Roof 1,018
DMA-11 Drains to IMP-2 Paving 14,858
DMA-12 Drains to IMP-2 Roof 2,030
DMA-13 Drains to IMP-2 Roof 2,030
DMA-14 Drains to IMP-2 Landscape 4,668
DMA-15 Drains to IMP-2 Roof 1,925
DMA-16 Drains to IMP-3 Landscape 2,457
DMA-17 Drains to IMP-3 Roof 2,030
DMA-18 Drains to IMP-3 Paving 1,603
DMA-19 Drains to IMP-3 Roof 1,925
DMA-20 Drains to IMP-3 Landscape 1,719
DMA-21 Drains to IMP-4 Landscape 1,608
DMA-22 Drains to IMP-4 Roof 2,030
DMA-23 Drains to IMP-4 Paving 1,506
DMA-24 Drains to IMP-4 Roof 1,925
DMA-25 Drains to IMP-4 Landscape 1,719
DMA-26 Drains to DMA-27 Paving 336
DMA-27 Self-Retaining Landscape 201
DMA-28 Self-Retaining Landscape 1,677
IV.A.2. Drainage Management Area Descriptions
Buttonwood Entry (DMA-1, totaling 2,005 square feet), drains to street gutter, which drains to Bioretention Area 1 (IMP-1).

Roofs (DMAs 2, 4, 5, 6, 7, 9, 10, 12, 13, 15, 17, 19, 22, and 24, totaling 24,051 square feet), drain via roof drains to driveways or swales adjacent to the driveways to the street gutters, which drain to Bioretention Areas 2, 3, and 4.

Buttonwood Lane, Court “A”, Court “B” driveways (DMAs 11, 18, and 23, totaling 17,967 square feet), drain via street gutters, which drain to Bioretention Areas 2, 3, and 4.

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Front and Rear Yards (DMAs 3, 8, 14, 16, 20, 21, and 25, totaling 23,298 square feet), drain via area storm drains through curb drain, which outlet to street gutters, which drain to Bioretention Areas 2, 3, and 4.

Sidewalks (DMA-26, totaling 336 square feet), sheet drains to Self-Retaining Area (DMA-27) Self-Retaining Landscape (DMAs 27 and 28, totaling 1,879 square feet), Self-Retaining No non-LID treatment is being utilized as a part of this project.

IV.B. Tabulation and Sizing Calculations
IV.B.1. Information Summary for IMP Design
The project is utilizing bio-retention throughout the project to treat impervious areas. A portion of the project is listed as self-treating.

Total Project Area (Square Feet) 73,008
Mean Annual Precipitation 17”
IMPs Designed For: [treatment only]
IV.B.2. Self-Treating Areas
This project and the table above does not include self-treating areas.

IV.B.3. Self-Retaining Areas
This project and the table above includes self-retaining areas.

IV.B.4. Areas Draining to Self-Retaining Areas
Concrete Sidewalk (DMA-26) drains to Self-Retaining Area, DMA-27. See Table 3 above.

IV.B.5. Areas Draining to IMPs
See Table 3 above.

IV.C. Integrated Management Practice Descriptions
Runoff from impervious areas on the site, including roofs and paved areas, will be routed to four (4) different flow-through planters (see Exhibit).

IMP #1 is located in the southwest corner of the property. The facility is adjacent to the proposed street, Buttonwood Lane and existing street, Clayton Way.

IMP #2 is located in the northwest corner of the property. The facility is adjacent to the proposed street, Buttonwood Lane and Lot 14.

IMP #3 is located between Lots 11 and 12. The facility is at the end of Court “B”.

IMP #4 is located between Lots 3 and 4. The facility is at the end of Court “A”.

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Each of the facilities will be designed and constructed to the criteria in the Stormwater C.3 Guidebook 8th Edition, including the following features:
• Surrounded by concrete curb. Where adjacent to pavement, curbs will be deepened, reinforced, and impermeable.
• Each layer built flat, level, and to the elevations specified in the plans:
o Finish Grade of soil (FG)
o Overflow Grate (GRATE or RIM)
o Invert (INV)
o Top of Curb (TC)
• 12 inches Class 2 permeable, Caltrans specification 68-2.02F(3). • 18 inches soil mix meeting the specifications proposed by BASMAA and accepted by Water Board staff approved April 18, 2016.
• 6-inch diameter PVC SDR 35 perforated pipe underdrain, installed with the invert at the top of the Class 2 permeable layer with perforations facing down, and connected to the overflow structure at that same elevation
• 6-inch deep ponding between top of soil elevation and overflow grate elevation • Concrete drop inlet with frame overflow structure with grate set to specified elevation, connected to storm drain in Concord Blvd.
• Deepened curb to protect adjacent pavement
• Plantings selected for water conservation
V. SOURCE CONTROL MEASURES
V.A. Site activities and potential sources of pollutants Potential sources of pollutants in a residential project include discharge of wash water or other liquids into storm drain inlets, pesticides (both outdoor and indoor), and vehicles. A variety of garbage and other pollutants are sometimes disposed in storm drain inlets. Sub-contractors may use pesticides on landscaping and garden areas to protect the site from insects. Impervious areas such as roofs, roadways, and driveways collect fine sediment, oils, and other debris. These areas of the project where these potential pollutant sources exist will drain to the IMP for treatment prior to discharge to the underground storm drain collect and convey system.

V.B. Source Control Table
Source Control Table #5

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Potential Sources of
Runoff Pollutants
Permanent IMPs Operational IMPs
Storm Drain Inlets • Mark all inlets with the words “No Dumping! Drains to Creek” or similar. (City Approved)
• Inlet markings will be inspected annually
and replaced or repainted as necessary.
• Storm water pollution prevention
information will be provided to new
homeowners.
• Inlets, pipes, & swales conveying water to
BMPs will be inspected & maintained as
part of the BMP Operation & Maintenance
Plan.

Need for future indoor
and structural pest
control.
• Standard building design minimizes potential
need for future pest control.
• Standard building design ensuring finished
ground is 6” below the wall, which prevents
water from rotting the wall and attracting
termites, window sills are sloped to prevent
water ponding and wood rot, attic vents and
windows will have screens to deter pests from
entering the structure.
• Developer will receive integrated pest
management information.

Landscape/Outdoor
Pesticide Use
• Final Landscape Plans are designed to minimize
required irrigation and runoff, and to minimize
the use of fertilizers and pesticides that can
contribute to storm water pollution.
• Final Landscape Plans are designed to use pest
resistant plants (where possible), especially for
locations adjacent to hardscape.
• Final Landscape Plans are designed to use
plants appropriate to site soils, slopes, climate,
sun, wind, rain, land use, air movement,
ecological consistency, and plant interactions.
• Developer will receive integrated pest
management information.
• Landscaping is to be maintained using IPM
principles, with minimal or no use of
pesticides.
• Developer contractors will utilize current
BMP’s to reduce adverse environmental
impacts.

Sidewalks, Patios • Patios, walkways, and any other impervious features drain to IMPs for treatment rather than
directly to storm drains.
• Developer will receive storm water
pollution prevention information.

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1836 Clayton Way, Concord Page 11 of 14 January 2023
V.C. Features, Materials, and Methods of Construction of Source Control BMPs VI. STORMWATER FACILITY MAINTENANCE
VI.A. Ownership and Responsibility for Maintenance in Perpetuity The applicant, WRSJG LLC, accepts responsibility for the maintenance and responsibility of each IMP residing on the respected parcel. The Owner will commit to executing any necessary agreements.

VI.B. Summary of Maintenance Requirements for Each Storm Water Facility These facilities remove pollutants primarily by filtering runoff slowly through an active layer of soil. Routine maintenance is needed to ensure that flow is unobstructed, that erosion is prevented, and that soils are held together by plant roots and are biologically active.

General Maintenance Rules
At no time will synthetic pesticides or fertilizers be applied, nor will any soil amendments, other than aged compost mulch or sand/compost mix, be introduced. The top of soil surface will be maintained at or near the design elevation throughout. Irrigation systems will be maintained to conserve water while maintaining plant health.

Although it is unlikely to be needed, if plants are not thriving compost tea may be applied at a recommended rate of 5 gallons mixed with 15 gallons of water per acre, up to once per year between March and June. Compost tea will not be applied when temperatures are below 50°F or above 90°F or when rain is forecast within the next 48 hours.

The following may be applied for pest control if needed:
 Beneficial nematodes
 Safer® products
 Neem oil
If mosquito larvae are present and persistent, contact the Contra Costa Mosquito and Vector Control District for information and advice. Mosquito larvicides should be applied only when absolutely necessary and then only by a licensed individual or contractor.

Routine Maintenance
The facilities will be examined [daily for commercial; weekly for residential] for visible trash, and trash will be removed. Any graffiti, vandalism, or other damage will be noted and addressed within 48 hours.

The planted areas will be weeded by hand approximately monthly. At this time, plants will be inspected for health and the irrigation system will be turned on manually and checked for any leaks or broken lines, misdirected spray patterns etc. Any dead plants will be replaced.

Following Significant Rain Events
A significant rain event is one that produces approximately a half-inch or more rainfall in a 24-hour period. Within 24 hours after each such event, the following will be conducted:
 The surface of the facility will be observed to confirm ponding is not prolonged.

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1836 Clayton Way, Concord Page 12 of 14 January 2023
 The surface of the mulch layer will be inspected for movement of material. Mulch will be replaced and raked smooth if needed.
 Inlets will be inspected, and any accumulations of trash or debris will be removed. Any erosion at inlets should be restored to grade.
• Side slopes, if any, will be inspected for evidence of instability or erosion, and corrections will be made as necessary.
• Check dams will be inspected for movement and corrections made as necessary. • Outlet structures will be inspected for any obstructions.

Prior to the Start of the Rainy Season
In September of each year, facility inlets and outlets [including flow-control orifices, if any] will be inspected to confirm there is no accumulation of debris that would block flow.

Stormwater should drain freely into the bioretention facilities.

If not previously addressed during monthly maintenance, any growth and spread of plantings that blocks inlets or the movement of runoff across the surface of the facility will be cut back or removed.

Annually During Winter
Once, in December – February of each year, vegetation will be cut back as needed, debris removed, and plants and mulch replaced as needed. The concrete work will be inspected for damage. The elevation of the top of soil and mulch layer will be confirmed to be consistent with the 6-inch reservoir depth.

VII. CONSTRUCTION PLAN C.3 CHECKLIST TABLE #6
Stormwater Control Plan
Page #
BMP Description See Plan Sheet #s
Table on
C.3 Compliance Exhibit
Bioretention Areas Tentative Map, Sheet C-9
Source Control Table Drain Inlets to be marked with “no dumping” message Stormwater Control Plan (pg. 10, “Source Control Table”), City of
Concord Standard Detail S-39
Source Control Table Plant selection to minimize irrigation, minimize use of fertilizers and pesticides, and pest resistance
Stormwater Control Plan (pg. 10,
“Source Control Table”)
Source Control Table Pavement, driveways, and parking areas drain to IMPs Tentative Map, Sheets C-7 & C-8

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VIII.CERTIFICATIONS
The selection, sizing, and preliminary design of storm water treatment and other control measures in this plan meet the requirements of Regional Water Quality Control Board Order R2-2015-0049. ________________________________ ___________
Michael E. Milani, P.E. (Civil Engineer) Date
R.C.E. No. 35121 Exp. 9-30-2023

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1836 Clayton Way, Concord Page 14 of 14 January 2023

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United States
Department of
Agriculture
A product of the National
Cooperative Soil Survey,
a joint effort of the United
States Department of
Agriculture and other
Federal agencies, State
agencies including the
Agricultural Experiment
Stations, and local
participants
Custom Soil Resource
Report for
Contra Costa
County, California Natural
Resources
Conservation
Service
January 25, 2023

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Preface
Soil surveys contain information that affects land use planning in survey areas.

They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers.

Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment.

Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions.

The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations.

Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/ portal/nrcs/main/soils/health/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/? cid=nrcs142p2_053951).

Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations.

The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey.

Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information.

The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2

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alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer.
3

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Contents
Preface....................................................................................................................2 How Soil Surveys Are Made..................................................................................5 Soil Map.................................................................................................................. 8 Soil Map................................................................................................................9 Legend................................................................................................................10 Map Unit Legend................................................................................................ 11 Map Unit Descriptions.........................................................................................11 Contra Costa County, California..................................................................... 13 RbA—Rincon clay loam, 0 to 2 percent slopes, MLRA 14..........................13 References............................................................................................................15 4

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How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity.

Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA.

The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape.

Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil-vegetation-landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries.

Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units).

Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil 5

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scientists classified and named the soils in the survey area, they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research.

The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas.

Soil scientists make many field observations in the process of producing a soil map.

The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil-landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil-landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded.

These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components. Properties of each soil typically vary from one point to another across the landscape.

Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties.

While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field-observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management.

Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil.

Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date.

After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and Custom Soil Resource Report
6

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identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately.

Custom Soil Resource Report
7

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Soil Map
The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. 8

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9 Custom Soil Resource Report
Soil Map
4204030 4204050 4204070 4204090 4204110 4204130 4204150 4204170 4204190 4204210 4204230 4204030 4204050 4204070 4204090 4204110 4204130 4204150 4204170 4204190 4204210 4204230 4204250 587310 587330 587350 587370 587390 587410 587430 587450 587310 587330 587350 587370 587390 587410 587430 587450 587470 37° 58' 54'' N
122° 0' 21'' W
37° 58' 54'' N
122° 0' 14'' W
37° 58' 46'' N
122° 0' 21'' W
37° 58' 46'' N N 122° 0' 14'' W
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84 0 50 100 200 300
Feet
0 15 30 60 90
Meters
Map Scale: 1:1,100 if printed on A portrait (8.5" x 11") sheet.

Soil Map may not be valid at this scale.

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MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.

Warning: Soil Map may not be valid at this scale.

Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale.

Please rely on the bar scale on each map sheet for map
measurements.

Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:

Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required.

This product is generated from the USDA-NRCS certified data as of the version date(s) listed below.

Soil Survey Area: Contra Costa County, California
Survey Area Data: Version 19, Aug 31, 2022
Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: Mar 9, 2022—Mar 11, 2022
The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident.

Custom Soil Resource Report
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Map Unit Legend
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI RbA Rincon clay loam, 0 to 2
percent slopes, MLRA 14

2.2 100.0%
Totals for Area of Interest 2.2 100.0%
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit.

A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class.

Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils.

Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape.

The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas.

Custom Soil Resource Report
11 Page 176 of 336
An identifying symbol precedes the map unit name in the map unit descriptions.

Each description includes general facts about the unit and gives important soil properties and qualities.

Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement.

Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.

Some map units are made up of two or more major soils or miscellaneous areas.

These map units are complexes, associations, or undifferentiated groups.

A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps.

The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example.

An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example.

An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.

Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example.

Custom Soil Resource Report
12 Page 177 of 336
Contra Costa County, California
RbA—Rincon clay loam, 0 to 2 percent slopes, MLRA 14
Map Unit Setting
National map unit symbol: 2tb8n
Elevation: 10 to 1,940 feet
Mean annual precipitation: 11 to 27 inches
Mean annual air temperature: 58 to 61 degrees F
Frost-free period: 250 to 320 days
Farmland classification: Prime farmland if irrigated
Map Unit Composition
Rincon and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Rincon
Setting
Landform: Alluvial fans, terraces
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Alluvium derived from sedimentary rock Typical profile
A - 0 to 6 inches: clay loam
Ap - 6 to 12 inches: clay loam
Bt - 12 to 29 inches: clay
Bk - 29 to 38 inches: silty clay loam
Ck - 38 to 79 inches: loam
Properties and qualities
Slope: 0 to 2 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Runoff class: Medium
Capacity of the most limiting layer to transmit water (Ksat): Moderately low to moderately high (0.06 to 0.20 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Calcium carbonate, maximum content: 5 percent
Maximum salinity: Nonsaline to very slightly saline (0.0 to 2.0 mmhos/cm) Available water supply, 0 to 60 inches: High (about 10.5 inches) Interpretive groups
Land capability classification (irrigated): 2s
Land capability classification (nonirrigated): 4s
Hydrologic Soil Group: C
Ecological site: R014XE025CA - FINE LOAMY BOTTOM
Hydric soil rating: No
Custom Soil Resource Report
13 Page 178 of 336
Minor Components
Brentwood
Percent of map unit: 5 percent
Hydric soil rating: No
Capay
Percent of map unit: 3 percent
Hydric soil rating: No
San ysidro
Percent of map unit: 2 percent
Hydric soil rating: No
Cropley
Percent of map unit: 1 percent
Danville
Percent of map unit: 1 percent
Yolo
Percent of map unit: 1 percent
Clear lake
Percent of map unit: 1 percent
Lockwood
Percent of map unit: 1 percent
Custom Soil Resource Report
14 Page 179 of 336
References
American Association of State Highway and Transportation Officials (AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition.

American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00.

Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31.

Federal Register. July 13, 1994. Changes in hydric soils of the United States.

Federal Register. September 18, 2002. Hydric soils of the United States.

Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States.

National Research Council. 1995. Wetlands: Characteristics and boundaries.

Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.

U.S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/ nrcs/detail/national/soils/?cid=nrcs142p2_054262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http:// www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053577 Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http:// www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053580 Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section.

United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1.

United States Department of Agriculture, Natural Resources Conservation Service.

National forestry manual. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/ home/?cid=nrcs142p2_053374
United States Department of Agriculture, Natural Resources Conservation Service.

National range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/ detail/national/landuse/rangepasture/?cid=stelprdb1043084 15 Page 180 of 336
United States Department of Agriculture, Natural Resources Conservation Service.

National soil survey handbook, title 430-VI. http://www.nrcs.usda.gov/wps/portal/ nrcs/detail/soils/scientists/?cid=nrcs142p2_054242
United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/? cid=nrcs142p2_053624
United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. http:// www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf Custom Soil Resource Report
16 Page 181 of 336
Project Name: 1836 Clayton Way
Project Type: Treatment Only
APN: 114-220-019-3
Drainage Area: 73,008
Mean Annual Precipitation: 17.0
II. Self-Retaining Areas
Self-Retaining DMA
DMA Name Area (sq ft)
DMA27 201
DMA28 1,677
III. Areas Draining to Self-Retaining Areas
DMA Name Area (sq ft) Surface Type Runoff Factor Product (Area x Runoff
Factor) [A]
Receiving Self
Retaining DMA
Receiving
Self-Retaing
DMA Area (sq
ft) [B]
Ratio [A]/[B]
DMA26 336 Concrete or Asphalt 1.0 336.0 DMA27 201 1.67
IV. Areas Draining to IMPs
IMP Name: IMP1
IMP Type: Bioretention Facility
Soil Group: IMP1
DMA Name Area (sq ft) Post Project
Surface Type
DMA Runoff
Factor
DMA Area x
Runoff Factor IMP Sizing
DMA1 2,005 Concrete or
Asphalt

1.00 2,005 IMP Sizing
Factor
Rain
Adjustment
Factor
Minimum
Area or
Volume
Proposed
Area or
Volume Total 2,005
Area 0.040 1.000 80 99
IMP Name: IMP2
IMP Type: Bioretention Facility
Soil Group: IMP2
DMA Name Area (sq ft) Post Project
Surface Type
DMA Runoff
Factor
DMA Area x
Runoff Factor IMP Sizing
DMA2 1,925 Conventional
Roof

1.00 1,925 IMP Sizing
Factor
Rain
Adjustment
Factor
Minimum
Area or
Volume
Proposed
Area or
Volume DMA3 3,223 Landscape 0.10 322
DMA4 2,030 Conventional
Roof

1.00 2,030

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DMA5 1,925 Conventional
Roof

1.00 1,925
DMA6 1,018 Conventional
Roof

1.00 1,018
DMA7 1,121 Conventional
Roof

1.00 1,121
DMA8 7,904 Landscape 0.10 790
DMA9 1,121 Conventional
Roof

1.00 1,121
DMA10 1,018 Conventional
Roof

1.00 1,018
DMA11 14,858 Concrete or
Asphalt

1.00 14,858
DMA12 2,030 Conventional
Roof

1.00 2,030
DMA13 2,030 Conventional
Roof

1.00 2,030
DMA14 4,668 Landscape 0.10 467
DMA15 1,925 Conventional
Roof

1.00 1,925
Total 32,581
Area 0.040 1.000 1,303 2,262
IMP Name: IMP3
IMP Type: Bioretention Facility
Soil Group: IMP3
DMA Name Area (sq ft) Post Project
Surface Type
DMA Runoff
Factor
DMA Area x
Runoff Factor IMP Sizing
DMA16 2,457 Landscape 0.10 246 IMP Sizing
Factor
Rain
Adjustment
Factor
Minimum
Area or
Volume
Proposed
Area or
Volume
DMA17 2,030 Conventional
Roof

1.00 2,030
DMA18 1,603 Concrete or
Asphalt

1.00 1,603
DMA19 1,925 Conventional
Roof

1.00 1,925
DMA20 1,719 Landscape 0.10 172
Total 5,976
Area 0.040 1.000 239 538
IMP Name: IMP4
IMP Type: Bioretention Facility
Soil Group: IMP4
DMA Name Area (sq ft) Post Project
Surface Type
DMA Runoff
Factor
DMA Area x
Runoff Factor IMP Sizing
DMA21 1,608 Landscape 0.10 161 IMP Sizing Rain Minimum Proposed

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DMA22 2,030 Conventional
Roof

1.00 2,030 Factor Adjustment
Factor
Area or
Volume
Area or
Volume
DMA23 1,506 Concrete or
Asphalt

1.00 1,506
DMA24 1,925 Conventional
Roof

1.00 1,925
DMA25 1,719 Landscape 0.10 172
Total 5,794
Area 0.040 1.000 232 538
Report generated on 1/12/2023 12:00:00 AM by the Contra Costa Clean Water Program IMP Sizing Tool software (version 1.3.1.0).

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Appendix E
Archeological and Historic Resources Assessment

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Rincon Consultants, Inc.
4 4 9 1 5 th S t r e e t, S u i te 3 0 3
Oakland, California 94612
510 8 3 4 4 4 5 5
i n f o @ ri n c o n c o n s u l t a n ts .c o m
w w w . r i n c o n c o n s u l t a n t s . c o m
E n v i r o n m e n t a l S c i e n t i s t s P l a n n e r s E n g i n e e r s November 17, 2021
Project Number 21-11715
Michael Hart, Assistant Planner
City of Concord, Community Development Department
1950 Parkside Drive, MS/53
Concord, California 94519
Via email: [email protected]
Subject: Archaeological – Historical Resources Assessment 1836 Clayton Way, Concord, Contra Costa County, California Dear Mr. Hart:

The City of Concord (City) retained Rincon Consultants, Inc. (Rincon) to prepare a Categorical Exemption (CE) under the California Environmental Quality Act (CEQA) for the 1836 Clayton Way residential subdivision project, located at 1836 Clayton Way (project site) in Concord (Figure 1 – Attachment A). The project site is currently developed with a single-family house, a detached garage, and a shed building.

The proposed project would demolish the existing buildings and subdivide the property into six lots for the construction of single-family residences on each lot. Each residence’s driveway would be accessed from a central driveway extending from Clayton Way into the site, with a three-point turnaround area near the end of the driveway.

Pursuant to Public Resources Code Section 21084(e) and State CEQA Guidelines Section 15300.2, a CE may not be used if the project would result in the substantial adverse change in the significance of a historical resource. Archaeological resources have the potential to qualify as historical resources pursuant to CEQA, should the resource be determined eligible for listing in the California Register of Historical Resources. The current assessment was prepared to enable the City, as the lead agency, to determine if there are any archaeological cultural resources that may qualify as historical resources and that may have potential to be impacted by the proposed project. Efforts for the current assessment included records searches of the California Historical Resources Information System (CHRIS) at the Northwest Information Center (NWIC) and the Native American Heritage Commission’s (NAHC) Sacred Lands File (SLF); as of the preparation of this memorandum, the results from the SLF search have not yet been received. An archaeological field survey of the project site was also completed to identify the presence of any archaeological cultural resources; the survey did not include the recordation or evaluation of any built environment properties, per the City of Concord.

This assessment was managed by Rincon Architectural Historian JulieAnn Murphy, MS. Rincon Archaeologist Elaine Foster, MA, Registered Professional Archaeologist (RPA), conducted the field survey. Rincon Senior Architectural Historian Steven Treffers, MHP, and Principal Andrew Pulcheon, MA, RPA, reviewed this assessment for quality control. All contributors to this assessment meet the Secretary of the Interior’s Professional Qualifications Standards in their respective fields (36 CFR Part 61).

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Archaeological - Historical Resources Assessment
1836 Clayton Way

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Cultural Resources Records Search
To identify previously conducted cultural resources studies and previously recorded cultural resources within the project site and a 0.5-mile radius, Rincon performed a search of the CHRIS at the NWIC at Sonoma State University on November 2, 2021. The CHRIS records search also included a review of the National Register of Historic Places (NRHP), the California Register of Historical Resources (CRHR), the California Points of Historical Interest list, the California Historical Landmarks list, the Archaeological Determinations of Eligibility list, and the California Built Environment Resource Directory (BERD).

The NWIC records search identified 17 previous studies within a 0.5-mile radius of the project site. None of the reports were located within the project site. The NWIC records search identified 12 previously recorded cultural resources within a 0.5-mile radius of the project site, all of which consist of historicaged buildings; none are located within or adjacent to the project site. The BERD did not identify any previously recorded cultural resources within or adjacent to the project site. No previously recorded archaeological cultural resources are located within the 0.5-mile radius of the project site. A detailed summary of the results of the CHRIS records search is included in Attachment B.

Sacred Lands File Search
Rincon contacted the NAHC on October 26, 2021, to request a search of the SLF at the NAHC (Attachment C). As of the writing of this memorandum, the results of the SLF search have not been received.

Archaeological Field Survey
On November 2, 2021, Rincon archaeologist Elaine Foster conducted a pedestrian survey of the project site. Ms. Foster walked a series of transects spaced no more than 5 meters apart across the project site.

Areas of exposed ground were inspected for prehistoric artifacts (e.g., flaked stone tools, tool-making debris, stone milling tools), ecofacts (marine shell and bone), soil discoloration that might indicate the presence of a cultural midden, and features that might indicate the presence of former structures or buildings (e.g., standing exterior walls, foundations) or historic debris (e.g., metal, glass, ceramics).

Subsurface soils associated with animal burrows were also visually inspected.

The survey indicated that the western portion of the project site is developed with a single-family house and associated accessory buildings with an approximately 20-foot-wide unpaved drive at the center of the site, and a curved dirt path along the western and southern sides of the single-family house (Figure 2 – Attachment A). Contra Costa County Assessor data indicates this residence may date to 1907; however, the recordation or evaluation of any built environment properties was outside of the scope of this assessment. The eastern portion of the project site consists of an undeveloped field (Figure 3 – Attachment A). Ground visibility was excellent (90-100%) in undeveloped areas and poor (0-10%) in areas developed with driveways or structures.

Soils within this area are brown, semi-fine loam, which was wet and muddy due to recent rainfall. Soils included some areas of deposited sand (Figure 4 – Attachment A). Vegetation included light grass coverage, as well as Oak and other varieties of trees. Disturbances with the project site include the previous development at the western edge of the site as well as associated utilities and other related items, such as sprinklers (Figure 5 – Attachment A). Modern trash was observed throughout the site including metal fragments, milled-wood piles, clear and brown glass bottles, and plastics.

The field survey did not identify any archaeological cultural resources in the project site.

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Archaeological - Historical Resources Assessment
1836 Clayton Way

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Conclusions
As summarized above, the CHRIS records search did not identify any archaeological cultural resources within the project site and a 0.5-mile radius. The field survey also did not identify any archaeological resources within the project site. A historic-era residence and associated buildings were identified; however, the recordation or evaluation was outside the scope of this assessment, per the City of Concord. A SLF search was requested but has not yet been received. However, the CHRIS records search and archaeological field survey did not identify any resources of Native American origin within the project site. Based on this data there is no information to suggest the site contains any archaeological cultural resources which are present or qualify as historical resources pursuant to Section 15064.5 of the CEQA Guidelines qualify as historical resources and be impacted by the proposed project.

Unanticipated Discovery of Archaeological Resources
If archaeological resources are encountered during ground-disturbing activities, work in the immediate area should be halted and an archaeologist meeting the Secretary of the Interior’s Professional Qualification Standards for archaeology (National Park Service 1983) should be contacted immediately to evaluate the find. If necessary, the evaluation may require preparation of a treatment plan and archaeological testing for CRHR eligibility. If the discovery proves to be significant under CEQA and cannot be avoided by the project, additional work, such as data recovery excavation, may be warranted to mitigate any significant impacts to historical resources.

Unanticipated Discovery of Human Remains
The discovery of human remains is always a possibility during ground-disturbing activities. If human remains are found, the State of California Health and Safety Code Section 7050.5 states that no further disturbance shall occur until the County Coroner has made a determination of origin and disposition pursuant to Public Resources Code Section 5097.98. In the event of an unanticipated discovery of human remains, the Contra Costa County Coroner must be notified immediately. If the human remains are determined to be prehistoric, the Coroner will notify the Native American Heritage Commission, which will determine and notify a Most Likely Descendant (MLD). The MLD shall complete the inspection of the site and provide recommendations for treatment to the landowner within 48 hours of being granted access.

Should you have any questions concerning this study, please do not hesitate to contact the undersigned at 925-326-1159 or at [email protected].

Sincerely,
Rincon Consultants, Inc.

JulieAnn Murphy
Architectural Historian Project Manager
Andrew Pulcheon, RPA, AICP, CEP
Principal

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Archaeological - Historical Resources Assessment
1836 Clayton Way

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Attachments:

Attachment A: Figures
Attachment B: Records Search Results
Attachment C: Sacred Land File Request

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Archaeological - Historical Resources Assessment
1836 Clayton Way

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Figure 1 Project SiteLocation

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Archaeological - Historical Resources Assessment
1836 Clayton Way

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Figure 2 Western Portion of Project Site, Unpaved Drive, View Southeast

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Archaeological - Historical Resources Assessment
1836 Clayton Way

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Figure 3 Overview of Proejct Site Field, View East

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Archaeological - Historical Resources Assessment
1836 Clayton Way

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Figure 4 Soils Within Project Site, View South

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Archaeological - Historical Resources Assessment
1836 Clayton Way

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Figure 5 Overview of Developed Portion of Project Site, View West

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Report List
Report No. Other IDs Year Author(s) Title Affiliation Resources S-001569 1979 Archaeological Reconnaissance of a Sewer
Construction Project Involving Parts of
Clayton and Concord, Contra Costa,
California.

California State University,
Chico
Peter M. Jensen 07-000104, 07-000105, 07-000192
S-015500 1993 Cultural Resources Overview, Naval
Weapons Station, Concord, Contra Costa
County, California
William Self, Greg William Self Associates, Inc.

Mattson, Carrie Wills,
Norm Dyer, and Ann
Samuelson
07-000402, 07-000403, 07-002683,
07-002871, 07-004707, 07-004708,
07-004710
Agency Nbr -
Contract No. N62474-
92-M-3638
S-018439 1996 Archaeological Inventory of a Portion of NWS Concord and an Archaeological Assessment
and Field Condition Review of CA-CCO-680,
Warehouse Site and Associated Access
Roads Naval Weapons Station, Concord,
Contra Costa County, California; Final Report
Basin Research Associates,
Inc.

Colin I. Busby, Donna M.

Garaventa, Stuart A.

Guedon, and Melody E.

Tannam
07-000003, 07-000485
S-018440 1996 Class II Archaeological Survey of the Contra Costa Canal, Contra Costa County, California
U.S. Bureau of
Reclamation, Mid-Pacific
Region
G. James West and
Patrick Welch
07-002695
S-035036 2008 Final Report for Concord Inland BRAC
Disposal Archaeological Survey, Naval
Weapons Station, Seal Beach, Detachment
Concord, Contra Costa County, California,
Contract No. N68711-04-D-3620, Task Order
0015
Arleen Garcia-Herbst and ASM Affiliates, Inc.

Micah Hale
07-000003, 07-000485, 07-000860,
07-000861, 07-002683, 07-002856,
07-002857, 07-002858, 07-002859,
07-002860, 07-002861, 07-002862,
07-002863, 07-002864, 07-002865,
07-002866, 07-002867, 07-002868,
07-002870, 07-002871, 07-002872,
07-002873
Other - Task Order
0015;
Submitter - Contract
No. N68711-04-D3620;
Voided - S-46207
S-037022 2008 Historic Resources Evaluation Report,
Proposed Concord Boulevard Gap Closure --
Phase 2 Project, Concord, California, 04-CC0-CND, CML-5135 (033) Matthew Davis and Karen Carey & Co., Inc.

McNeill
07-002695, 07-003018, 07-003019,
07-003020, 07-003021, 07-003022,
07-003023, 07-003024, 07-003025,
07-003026, 07-003027, 07-003028,
07-003029, 07-003030, 07-003031,
07-003032, 07-003033, 07-003034,
07-003035, 07-003036, 07-003037,
07-003038, 07-003039, 07-003040,
07-003041, 07-003042, 07-003043,
07-003044, 07-003045, 07-003046,
07-003047, 07-003048, 07-003049,
07-003050

OHP PRN - FHWA
081014A;

OHP PRN - FHWA
081017A;
Voided - 37023
S-037022a VOIDED-duplicate of main report.

S-037022b 2008 Archaeological Survey Report for Proposed Concord Boulevard Gap Closure -- Phase 2
Project, Concord, Contra Costa Conty,
California, 04-CC-O-CND, CML-5135 (033)
Sunshine Psota Holman & Associates

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Report List
Report No. Other IDs Year Author(s) Title Affiliation Resources S-037022c 2008 Historic Property Survey Report for the
proposed Concord Boulevard Gap Closure --
Phase 2 Project, Concord, Contra Costa
Conty, California, 04-CC-O-CND, CML-5135
(033)
Sunshine Psota Holman & Associates
S-037465 2010 Cultural Resources Records Search and Site for T-Mobile West Corpporation a Delaware
Corporation Candidate BA41426-B (MDUSD
Dent Center), 1936 Carlotta Drive, Concord,
Contra Costa County, California. (Letter
Report)
Michael Brandman
Associates
Carrie D. Wills

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Report List
Report No. Other IDs Year Author(s) Title Affiliation Resources S-046155 2009 Historic Building Inventory and Evaluation Update Report, Concord Naval Weapons
Station, Contra Costa County, California
JRP Historical Consulting
Services
Rand F. Herbert, Polly S.

Allen, Karen Clementi,
Jama Jones, and
Rebecca Flores
07-000806, 07-002079, 07-002080,
07-002081, 07-002082, 07-002083,
07-002084, 07-002085, 07-002086,
07-002087, 07-002088, 07-002089,
07-002090, 07-002091, 07-002092,
07-002093, 07-002094, 07-002095,
07-002096, 07-002097, 07-002098,
07-002099, 07-002100, 07-002101,
07-002102, 07-002103, 07-002104,
07-002105, 07-002106, 07-002107,
07-002108, 07-002109, 07-002110,
07-002111, 07-002112, 07-002113,
07-002114, 07-002115, 07-002116,
07-002117, 07-002118, 07-002119,
07-002120, 07-002121, 07-002122,
07-002123, 07-002124, 07-002125,
07-002126, 07-002127, 07-002128,
07-002129, 07-002130, 07-002131,
07-002132, 07-002133, 07-002134,
07-002135, 07-002136, 07-002137,
07-002138, 07-002139, 07-002140,
07-002141, 07-002142, 07-002143,
07-002144, 07-002145, 07-002146,
07-002147, 07-002148, 07-002149,
07-002150, 07-002151, 07-002152,
07-002153, 07-002154, 07-002155,
07-002156, 07-002157, 07-002158,
07-002159, 07-002160, 07-002161,
07-002162, 07-002163, 07-002164,
07-002165, 07-002166, 07-002167,
07-002168, 07-002169, 07-002170,
07-002171, 07-002172, 07-002173,
07-002174, 07-002175, 07-002176,
07-002177, 07-002178, 07-002179,
07-002180, 07-002181, 07-002182,
07-002183, 07-002184, 07-002185,
07-002186, 07-002187, 07-002188,
07-002189, 07-002190, 07-002191,
07-002192, 07-002193, 07-002194,
07-002195, 07-002196, 07-002197,
07-002198, 07-002199, 07-002200,
07-002201, 07-002202, 07-002203,
07-002204, 07-002205, 07-002206,
07-002207, 07-002208, 07-002209,
07-002210, 07-002211, 07-002212,
07-002213, 07-002214, 07-002215,

OHP PRN -
USN990510A;
Submitter - Contract
No. DACA05-97-D0013

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Report List
Report No. Other IDs Year Author(s) Title Affiliation Resources 07-002216, 07-002217, 07-002218,
07-002219, 07-002220, 07-002221,
07-002222, 07-002223, 07-002224,
07-002225, 07-002226, 07-002227,
07-002228, 07-002229, 07-002230,
07-002231, 07-002232, 07-002233,
07-002234, 07-002235, 07-002236,
07-002237, 07-002238, 07-002239,
07-002240, 07-002241, 07-002242,
07-002243, 07-002244, 07-002245,
07-002246, 07-002247, 07-002248,
07-002249, 07-002250, 07-002251,
07-002252, 07-002253, 07-002254,
07-002255, 07-002256, 07-002257,
07-002258, 07-002259, 07-002260,
07-002261, 07-002262, 07-002263,
07-002264, 07-002265, 07-002266,
07-002267, 07-002268, 07-002269,
07-002270, 07-002271, 07-002272,
07-002273, 07-002274, 07-002275,
07-002276, 07-002277, 07-002278,
07-002279, 07-002280, 07-002281,
07-002282, 07-002283, 07-002284,
07-002285, 07-002286, 07-002287,
07-002288, 07-002289, 07-002290,
07-002291, 07-002292, 07-002293,
07-002294, 07-002295, 07-002296,
07-002297, 07-002298, 07-002299,
07-002300, 07-002301, 07-002302,
07-002303, 07-002304, 07-002305,
07-002306, 07-002307, 07-002308,
07-002309, 07-002310, 07-002311,
07-002312, 07-002313, 07-002314,
07-002315, 07-002316, 07-002317,
07-002318, 07-002319, 07-002320,
07-002321, 07-002322, 07-002323,
07-002324, 07-002325, 07-002326,
07-002327, 07-002328, 07-002329,
07-002330, 07-002331, 07-002332,
07-002333, 07-002334, 07-002335,
07-002336, 07-002337, 07-002338,
07-002339, 07-002340, 07-002341,
07-002342, 07-002343, 07-002344,
07-002345, 07-002346, 07-002347,
07-002348, 07-002349, 07-002350,
07-002351, 07-002352, 07-002353,

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Report List
Report No. Other IDs Year Author(s) Title Affiliation Resources 07-002354, 07-002355, 07-002356,
07-002357, 07-002358, 07-002359,
07-002360, 07-002361, 07-002362,
07-002363, 07-002364, 07-002365,
07-002366, 07-002367, 07-002368,
07-002369, 07-002370, 07-002371,
07-002372, 07-002373, 07-002374,
07-002375, 07-002376, 07-002377,
07-002378, 07-002379, 07-002380,
07-002381, 07-002382, 07-002383,
07-002384, 07-002385, 07-002386,
07-002387, 07-002388, 07-002389,
07-002390, 07-002391, 07-002392,
07-002393, 07-002394, 07-002395,
07-002396, 07-002397, 07-002398,
07-002399, 07-002400, 07-002401,
07-002402, 07-002403, 07-002404,
07-002405, 07-002406, 07-002407,
07-002408, 07-002409, 07-002410,
07-002411, 07-002412, 07-002413,
07-002414, 07-002415, 07-002416,
07-002417, 07-002418, 07-002419,
07-002420, 07-002421, 07-002422,
07-002423, 07-002424, 07-002425,
07-002426, 07-002427, 07-002428,
07-002429, 07-002430, 07-002431,
07-002432, 07-002433, 07-002434,
07-002435, 07-002436, 07-002437,
07-002438, 07-002439, 07-002440,
07-002441, 07-002442, 07-002443,
07-002444, 07-002445, 07-002446,
07-002447, 07-002448, 07-002449,
07-002450, 07-002451, 07-002452,
07-002453, 07-002454, 07-002695,
07-004709, 07-004710
S-046155a 1998 DRAFT - Inventory and Evaluation of National Register Eligibility of Cold War Era And
Selected Other Buildings and Structures,
Naval Weapons Support Facility, Seal Beach,
Detachment Concord, Contra Costa County,
California
JRP Historical Consulting
Services

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Report List
Report No. Other IDs Year Author(s) Title Affiliation Resources S-046155b 1998 Inventory and Evaluation of National Register Eligibility of Cold War Era and Selected Other
Buildings and Structures, Weapons Station
Seal Beach, Detachment Concord, Contra
Costa County, California
JRP Historical Consulting
Services
S-046155c 1999 USN990510A; Inventory and Evaluation of
National Register Eligibility of Cold War Era
and Selected Other Buildings and Structures,
Weapons Station Seal Beach, Detachment
Concord, Contra Costa County
Department of the Army,
California Office of Historic
Preservation
Daniel Abeyta and Louis
S. Wall
S-049678 2016 Historic Property Survey Report for the SR4/Bailey Road Interchange Pedestrian & Bicycle Improvement Project, Bay Point,
Contra Costa, California, CCPWD Project:
0662-6R4121, EA: 04-3G840, EFIS: 04-1300-
0199
California Department of
Transportation, District 4
Caltrans - EA: 04- Aimee Arrigoni 07-002695
3G840;
Caltrans - EFIS: 04-
1300-0199;
OTIS Report
Number -
FHWA_2016_0419_0
01 S-049678a 2016 Archaeological Survey Report, SR-4/Bailey Road Interchange Pedestrian & Bicycle
Improvement Project, Bay Point, Contra
Costa, California, CCPWD Project: 0662-
6R4121, EA: 04-3G840/Project ID:
0413000199
Teresa Bulger WSA, Inc.

S-049678b 2016 Finding of No Adverse Effect-Non-Standard Conditions: SR-4/Bailey Road Interchange
Pedestrian & Bicycle Improvement Project,
Bay Point, Contra Costa, California, CCPWD
Project: 0662-6R4121, EA: 04-3G840/Project
ID: 0413000199
Aimee Arrigoni WSA, Inc.

S-049678c 2016 FHWA_2016_0419_001, Finding of No
Adverse Effect for the Proposed State Route
4/Bailey Road Interchange Pedestrian &
Bicycle Improvement Project, Contra Costa
County, CA
California Department of
Transportation; California
Office of Historic
Preservation
Kelly Hobbs and Julianne
Polanco

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Primary No. Trinomial
Resource List
Other IDs Type Age Attribute codes Recorded by Reports
P-07-002695 Resource Name - Contra Costa
Canal;
OTIS Resource Number -
645123;
Other - East Contra Costa
Irrigation District Main Canal
Complex;
OHP Z-number - CCO-Z00004;
Other - SW-57;
Other - Map Ref. No. 5 (2008 Site
Record);
Other - BV-106, BV-106(n), BV106(s);
OHP PRN - BUR 060505A;
OHP Property Number - 154520;
OHP PRN - FHWA050131A;
OHP PRN - BUR910227A;
Other - A/HC-161;
OHP Property Number - 154520;
National Register - 07-0055;
Voided - P-07-000492
S-017993, S018440, S-022812,
S-030592, S030653, S-031372,
S-031700, S031872, S-034865,
S-035244, S037022, S-037023,
S-037578, S038082, S-038392,
S-039289, S040646, S-043685,
S-043830, S043849, S-043866,
S-045838, S046155, S-046889,
S-047775, S047893, S-049670,
S-049678, S051501, S-051534,
S-052636, S053113, S-053134,
S-053160
Structure Historic HP20 1993 ([none], JRP Historical
Consulting Services);
1995 (Hatoff, Voss, Waechter, Wee,
Bente, Woodward-Clyde
Consultants);
2003 (Rand Herbert, JRP Historical
Consulting Services);
2005 (Rand Herbert, Kate
McLoughlin, JRP Historical
Consulting Services);
2008 (Karen McNeill and Matthew
Davis, Carey & Co.);
2008 (Cassidy DeBaker, Kruger
Frank, Garcia & Associates);
2009 (Rand Herbert, JRP Historical
Consultants);
2010 (R. Windmiller, Consulting
Archaeologist)
P-07-003029 Resource Name - 3535 Concord
Boulevard (Map reference no. 13)
Building Historic HP02 2008 (Karen McNeill, Matthew S-037022 Davis, Carey & Co., Inc.)
P-07-003030 Resource Name - 3537 Concord
Boulevard (Map reference no. 14)
Building Historic HP02 2008 (Karen McNeill, Matthew S-037022 Davis, Carey & Co., Inc.)
P-07-003031 Resource Name - 3549 Concord
Boulevard (Map reference no. 15)
Building Historic HP02 2008 (Karen McNeill, Matthew S-037022 Davis, Carey & Co., Inc.)
P-07-003032 Resource Name - 3553 Concord
Boulevard (Map reference no. 16)
Building Historic HP02 2008 (Karen McNeill, Matthew S-037022 Davis, Carey & Co., Inc.)
P-07-003044 Resource Name - 3484 Concord
Boulevard (Map reference no. 28)
Building Historic HP02 2008 (Karen McNeill, Matthew S-037022 Davis, Carey & Co., Inc.)
P-07-003045 Resource Name - 3496 Concord
Boulevard (Map reference no. 29)
Building Historic HP02 2008 (Karen McNeill, Matthew S-037022 Davis, Carey & Co., Inc.)
P-07-003046 Resource Name - 3498 Concord
Boulevard (Map reference no. 30)
Building Historic HP02 2008 (Karen McNeill, Matthew S-037022 Davis, Carey & Co., Inc.)
P-07-003047 Resource Name - 1799 Felicia
Lane (Map reference no. 31)
Building Historic HP02 2008 (Karen McNeill, Matthew S-037022 Davis, Carey & Co., Inc.)
P-07-003048 Resource Name - 3512 Concord
Boulevard (Map reference no. 32)
Building Historic HP02 2008 (Karen McNeill, Matthew S-037022 Davis, Carey & Co., Inc.)

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Primary No. Trinomial
Resource List
Other IDs Type Age Attribute codes Recorded by Reports
P-07-003049 Resource Name - 3520 Concord
Boulevard (Map reference no. 33)
Building Historic HP02 2008 (Karen McNeill, Matthew S-037022 Davis, Carey & Co., Inc.)
P-07-003050 Resource Name - 3540 Concord
Boulevard (Map reference no. 34)
Building Historic HP02 2008 (Karen McNeill, Matthew S-037022 Davis, Carey & Co., Inc.)

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Sacred Lands File & Native American Contacts List Request

NATIVE AMERICAN HERITAGE COMMISSION
1550 Harbor Blvd, Suite 100
Sacramento, CA 95814
(916) 373-3710
(916) 373-5471 – Fax
[email protected]
Information Below is Required for a Sacred Lands File Search Project: 1836 Clayton Way Residence Project
County: Contra Costa
USGS Quadrangle Name: Walnut Creek
Township: 02N Range: 01W Section(s): 29-32
Company/Firm/Agency: Rincon Consultants, Inc.

Contact Person: Elaine Foster
Street Address: 449 15th Street, Suite 303
City: Oakland Zip: 94612
Phone: 510-379-7006
Email: [email protected]
Project Description: The project would involve subdividing a 1.66-acre property with frontage on the east side of Clayton Way just south of its intersection with Wren Avenue into six lots and constructing single family residences on each lot.

Driveways will be accessed from a central driveway extending Clayton Way into the site with a three-point turnaround area near the end of the driveway. The project would also require the removal of a number of trees of varying sizes, including live oak and valley oak trees.

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CONDITIONS OF APPROVAL

BUTTONWOOD VILLAGE SUBDIVISION
PL23017 – TM, UP, DR, RT
1836 CLAYTONW WAY
APN 114-220-019

PERMIT DESCRIPTION

1. These Conditions of Approval apply to and constitute the approval of a Tentative Map (PL23017-TM) consisting of 14 single-family residential parcels, one private street parcel (Parcel A), three stormwater treatment parcels (Parcels B through D), and a landscape parcel (Parcel E) on a 1.67-gross acre lot.

These Conditions apply to and constitute the approval of a Planned Development Use Permit (PDUP) for PL23017-UP consisting of 14 units with the following development standards Standards Required/
Allowed
Provided
Lot Area (min.) 1,920 sq. ft. 2,321–4,900 sq. ft.

Density (max.) 10 du/net acre 10.33 du/net acre1
Lots 1,920 –
2,999 sq. ft.
24 feet 38–46.5 feet
Lots 3,000 –
3,999 sq. ft.
30 feet 48.5–48 feet
Lot width (min.)
Lots 4,000 –
4,999 sq. ft.
40 feet 48–49 feet
Lots 1,920 –
2,999 sq. ft.
80 feet 59.5 feet1
Lots 3,000 –
3,999 sq. ft.
80 feet 83 feet
Lot Depth (min.)
Lots 4,000 –
4,999 sq. ft.
100 feet 100 feet
Lots 1,920 –
2,999 sq. ft.
55 percent 38–48 percent
Lots 3,000 –
3,999 sq. ft.
50 percent 47–53 percent1
Lot Coverage on
Individual Lots (max.)
Lots 4,000 –
4,999 sq. ft.
45 percent 41–43 percent
Lots 1,920 –
2,999 sq. ft.
35 feet Plan 1: 24’-9”
Plan 1X: 27’-1”
Lots 3,000 –
3,999 sq. ft.

Height (max.)
Lots 4,000 –
30 feet Plan 2: 26’-9”
Plan 3: 28’-8”
1 Allowed pursuant to State Density Bonus Law.

Exhibit B to Attachment 1

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2 Standards Required/
Allowed
Provided
4,999 sq. ft.

Lots 1,920 –
2,999 sq. ft.

N/A 10.3–15.8 feet
Lots 3,000 –
3,999 sq. ft.
10 feet 11–16.5 feet
Front Setback (min.)
Lots 4,000 –
4,999 sq. ft.
15 feet 15–16.5 feet
Lots 1,920 –
2,999 sq. ft.

N/A 5 feet
Lots 3,000 –
3,999 sq. ft.
3 feet 4–5.5 feet
Interior Side Setback
(min.)
Lots 4,000 –
4,999 sq. ft.
4 feet 5–5.5 feet
Lots 1,920 –
2,999 sq. ft.
5 feet 6.5–11.5 feet
Lots 3,000 –
3,999 sq. ft.
6 feet 7 feet
Street Side Setback
(min.; corner lots)
Lots 4,000 –
4,999 sq. ft.
8 feet N/A
Lots 1,920 –
2,999 sq. ft.

N/A 5 feet
Lots 3,000 –
3,999 sq. ft.
10 feet 10–12 feet
Rear Setback (min.)
Lots 4,000 –
4,999 sq. ft.
15 feet 23 feet
Aggregate Lot Coverage (max.) 40 percent 33 percent
Landscape Strip Adjoining RS district
(min. width)
5 feet 5 feet
Building setback from adjacent RS
district (min.)
8 feet 8 feet
Private 300 square feet 225–1,613 square
feet1
Open Space per lot
Common 175 square feet
(2,450 sq. ft.)
0 1
Parking Spaces (min.) 2.5 spaces/unit
(35 total spaces)1
48 spaces
Fence Height (max.) 3 ft. in front
yards;
6 ft. in side & rear
yards (plus 1 ft.
lattice)
7 foot solid wood
fence along Clayton
Way and adjacent
to Buttonwood
Lane1; 6 ft. (plus 1
ft. lattice)
surrounding
remaining site
perimeter and in

Page 208 of 336 ends

3 Standards Required/
Allowed
Provided
side and rear yards

2. These Conditions apply to and constitute approval of Tree Removal Permit (PL23017-RT) for the removal of 12 Protected Trees, as referenced in the Arborist Report prepared by James S. Duncan and date stamp received March 28, 2023 by the Planning Division. (PLNG)

3. These Conditions apply to and constitute approval of a Design and Site Review (PL23017- DR) for building elevations and landscape plans for 14 single-family homes and five common area parcels. Final colors and materials shall be consistent with the color and materials exhibit dated May 4, 2023, prepared by Robert Lee, Mark Retherford, and Rick Stover and recommended for approval by the Design Review Board. Exterior building materials and color shall be in substantial conformance with the approved plans as follows:

Elevation ‘A’ – Scheme 1
Material Location Manufacturer Product Name
(Color/Style)
Product
Number
Roof Tiles N/A GAF Grand Canyon
Shingles:

Stonewood
N/A
Vinyl Windows N/A Milgard (or
equal)
White N/A
Gutters &
Downspouts
N/A Sherwin
Williams
Match adjacent N/A
Corner Boards N/A Sherwin
Williams
Match adjacent N/A
Siding Color Lap
Siding/Stucco
Sherwin
Williams
Retreat SW6207
Trim Color #1 Braces, gable
siding, garage
door, posts, pot
shelves,
secondary doors,
trim
Sherwin
Williams
Paperwhite SW 7105
Trim Color #2 Barge boards,
corbels, eaves,
fascia, front
door
Sherwin
Williams
Otter SW 6041
Elevation ‘A’ – Scheme 2
Material Location Manufacturer Product Name
(Color/Style)
Product
Number
Roof Tiles N/A GAF Grand Canyon
Shingles: Black
N/A

Page 209 of 336 ends

4 Oak
Vinyl Windows N/A Milgard (or
equal)
Match adjacent N/A
Gutters &
Downspouts
N/A Sherwin
Williams
Match adjacent N/A
Corner Boards N/A Sherwin
Williams
Match adjacent N/A
Siding Color Lap Siding Sherwin
Williams
Tin Lizzie SW 9163
Trim Color #1 Gable siding,
garage door,
posts,
secondary
doors, stucco,
trim
Sherwin
Williams
Creamy SW 7012
Trim Color #2 Barge boards,
eaves, fascia
Sherwin
Williams
Peppercorn SW 7674
Accent Color Front door Sherwin
Williams
Sommelier SW 7595
Elevation ‘B’ – Scheme 3
Material Location Manufacturer Product Name
(Color/Style)
Product
Number
Roof Tiles N/A GAF Grand Canyon
Shingles: Black
Oak
N/A
Vinyl Windows N/A Milgard (or
equal)
Match adjacent N/A
Manufactured
Thin Brick &
Cap
N/A H.C. Muddox Midnight Smoke N/A
Grout at Brick N/A Orco Soft white N/A
Gutters &
Downspouts
N/A Sherwin
Williams
Match adjacent N/A
Stucco Color N/A Sherwin
Williams
Felted Wool SW 9171
Trim Color #1 Barge boards,
braces, corbels,
eaves, fascia,
gable vents,
garage door,
secondary
doors, trim
Sherwin
Williams
Aged White SW 9180
Accent Color Front door,
shutters
Sherwin
Williams
Iron Ore SW 7069

Page 210 of 336 ends

5 Elevation ‘B’ – Scheme 4
Material Location Manufacturer Product Name
(Color/Style)
Product
Number
Roof Tiles N/A GAF Grand Canyon
Shingles:

Stonewood
N/A
Vinyl Windows N/A Milgard (or
equal)
Match adjacent N/A
Manufactured
Thin Brick &
Cap
N/A H.C. Muddox Coventry N/A
Grout at Brick N/A Orco Soft white N/A
Gutters &
Downspouts
N/A Sherwin
Williams
Match adjacent N/A
Stucco Color N/A Sherwin
Williams
Medici Ivory SW 7558
Trim Color #1 Barge Boards,
braces, corbels,
eaves, fascia,
gable vents,
secondary
doors, trim
Sherwin
Williams
Sealskin SW 7675
Trim Color #2 Gable siding,
garage door
Sherwin
Williams
Brainstorm
Bronze
SW 7033
Accent Color Front door,
shutters
Sherwin
Williams
Foxhall Green SW 9184
Elevation ‘C’ – Scheme 5
Material Location Manufacturer Product Name
(Color/Style)
Product
Number
Roof Tiles N/A GAF Grand Canyon
Shingles: Storm
Cloud
N/A
Vinyl Windows N/A Milgard (or
equal)
Match adjacent N/A
Gutters &
Downspouts
N/A Sherwin
Williams
Match adjacent N/A
Corner Boards N/A Sherwin
Williams
Match adjacent N/A
Stucco Color N/A Sherwin
Williams
Repose Gray SW 7015
Siding Color Lap Siding Sherwin
Williams
Pewter Cast SW 7673
Trim Color Barge Boards,
eaves, fascia,
gable vents,
garage door,
Sherwin
Williams
Alabaster SW 7008

Page 211 of 336 ends

6 posts, railing,
secondary
doors, trim
Accent Color #1 Front door Sherwin
Williams
Distance SW 6243
Accent Color #2 Shutters Sherwin
Williams
Black Magic SW 6991
Elevation ‘C’ – Scheme 6
Material Location Manufacturer Product Name
(Color/Style)
Product
Number
Roof Tiles N/A GAF Grand Canyon
Shingles:

Mission Brown
N/A
Vinyl Windows N/A Milgard (or
equal)
Match adjacent N/A
Gutters &
Downspouts
N/A Sherwin
Williams
Match adjacent N/A
Corner Boards N/A Sherwin
Williams
Match adjacent N/A
Stucco Color N/A Sherwin
Williams
Studio Clay SW 9172
Siding Color Lap Siding Sherwin
Williams
Rookwood Dark
Red
SW 2801
Trim Color Barge boards,
eaves, fascia,
gable vents,
garage door,
posts, railing,
secondary
doors, trim
Sherwin
Williams
Aged White SW 9180
Accent Color Front door,
shutters
Sherwin
Williams
Black Bean SW 6006

4. The following attachments, date stamped received by the City of Concord, on May 4, 2023, are approved and shall be incorporated as Conditions of Approval.

Plan Date Prepared Prepared by Sheet
Cover Sheet 5-4-2023 WHA Architects CS
Conceptual Site Plan 5-4-2023 WHA Architects SP1
Project Information 5-4-2023 WHA Architects SP2
Streetscene Exhibits 5-4-2023 WHA Architects SS1
Plan 1 Floor Plans 5-4-2023 WHA Architects A1.1
Plan 1 Roof Plan 5-4-2023 WHA Architects A1.2
Plan 1 Exterior Elevations
‘A’
5-4-2023 WHA Architects A1.3
Plan 1 Section 5-4-2023 WHA Architects A1.4

Page 212 of 336 ends

7 Plan 1X Floor Plans 5-4-2023 WHA Architects A1X.1
Plan 1X Roof Plan 5-4-2023 WHA Architects A1X.2
Plan 1X Exterior
Elevations ‘B’
5-4-2023 WHA Architects A1X.3
Plan 1X Section 5-4-2023 WHA Architects A1X.4
Plan 2 Floor Plans 5-4-2023 WHA Architects A2.1
Plan 2 Roof Plans 5-4-2023 WHA Architects A2.2
Plan 2 Exterior Elevations
‘C’
5-4-2023 WHA Architects A2.3
Plan 2 Exterior Elevations
‘C’ w/ Opt. Covered Patio
5-4-2023 WHA Architects A2.4
Plan 2 Section 5-4-2023 WHA Architects A2.5
Plan 3 Floor Plans 5-4-2023 WHA Architects A3.1
Plan 3 Roof Plans 5-4-2023 WHA Architects A3.2
Plan 3 Exterior Elevations
‘B’
5-4-2023 WHA Architects A3.3
Plan 3 Exterior Elevations
‘B’ w/ Opt. Covered Patio
5-4-2023 WHA Architects A3.4
Plan 3 Section 5-4-2023 WHA Architects A3.5
Architectural Details 5-4-2023 WHA Architects A4.1
Exterior Color & Materials 5-4-2023 WHA Architects CM1.1 Exterior Color & Materials 5-4-2023 WHA Architects CM1.2 Exterior Color & Materials 5-4-2023 WHA Architects CM1.3 Preliminary Landscape
Plan
5-4-2023 RW Stover &
Associates, Inc.

L1
Preliminary Plan Images 5-4-2023 RW Stover &
Associates, Inc.

L2
Cover Sheet 5-4-2023 Milani & Associates C-1
Boundary & Topographic
Survey
5-4-2023 Milani & Associates C-2
Existing Conditions –
Aerial Photo
5-4-2023 Milani & Associates C-3
Demolition & Tree
Removal Plan
5-4-2023 Milani & Associates C-4
Subdivision Lotting 5-4-2023 Milani & Associates C-5
Structure
Setbacks/Structure
Separation Exhibit
5-4-2023 Milani & Associates C-6
Composite Site Plan 5-4-2023 Milani & Associates C-7
Preliminary Grading and
Drainage Plan
5-4-2023 Milani & Associates C-8
Preliminary Utility Plan 5-4-2023 Milani & Associates C-9 C.3 Compliance Plan 5-4-2023 Milani & Associates C-10
Earthwork Analysis 5-4-2023 Milani & Associates C-11
Erosion Control Plan 5-4-2023 Milani & Associates C-12
Erosion Control Notes 5-4-2023 Milani & Associates C-13

Page 213 of 336 ends

8 Signing, Striping, & Site
Visibility Plan
5-4-2023 Milani & Associates C-14
Photo Index 5-4-2023 Milani & Associates C-15
Cross Sections 5-4-2023 Milani & Associates C-16
Details 5-4-2023 Milani & Associates C-17
Details 5-4-2023 Milani & Associates C-18

PROJECT-SPECIFIC CONDITIONS

5. The project shall be granted the following in conformance with the State’s Density Bonus Law (Government Code Section 65915): 1) increased density for the project of up to

10.33 du/net acre; 2) one concession granting relief from any requirement or in-lieu fee for undergrounding utilities for the current project; and 3) eight reductions to development standards: a) reduction of the minimum lot depth for Lots 6 through 9 from 80 to 59 feet; b) reduction of private open space requirements under Concord Development Code (CDC) Section 18.150.100(C) for lots 6 through 9 from 300 square feet to 225 square feet; c) elimination of common open space (interior park) requirement for the project; d) elimination of any interior sidewalks, other than the connection along Lot 1’s frontage to the sidewalk along Clayton Way; e) increase the maximum lot coverage for Lots 2, 4, and 10 to 53 percent; f) reduction of the size of the required trees in the C.3 landscape areas from 24-inch boxes to 15-gallon containers; g) increase in maximum fence height from seven feet (six feet plus one foot of lattice) along side and rear property lines and three feet along Clayton Way, to seven feet around the entire perimeter; and h) reduction of the recessed garage requirement of five feet from the primary façade of the residence to three-foot six-inches for Plan 3 and four-foot twoinches for Plan 1X . (PLNG, HSG, ENGR)

6. Owner/property manager shall ensure that all occupants park their vehicles on site within the garages. Language shall be included in the CC&R’s stating owners or tenants shall park onsite in the project’s garage, and not on the street in the neighborhood.

Garages shall not be used for storage of goods or materials, nor as a workshop or other use if such storage or use would prevent the use of the garage from being utilized for the parking of automobiles within the garage. This restriction shall be included within the tenant agreement and a copy of the agreement with said language shall be submitted to the City, prior to building occupancy, for review and approval of the City’s Planning Division and City Attorney. (PLNG)

7. The Covenants Conditions and Restrictions (CC&Rs) shall be submitted for review and approval by the City’s Planning Division and City Attorney and recorded prior to Final Map approval. A Homeowners Association (HOA) shall be created for this project to ensure proper ongoing maintenance of improvements utilized in common. The Association shall be governed by CC&Rs in accordance with CMC Section 17.35.110 (Covenants, conditions, and restrictions). (PLNG, CAO)

8. The CC&R’s and deed disclosure shall include a requirement that, in the event that there is a future local undergrounding district to underground utilities along the Clayton Way frontage, all lots in the subdivision would be required to participate in the costs of the undergrounding. (ENGR, CAO)

Page 214 of 336 ends

9 GENERAL CONDITIONS

9. The Conditions are the responsibility of the applicant and all contractors. Compliance shall occur as specified in the Conditions or at one of the following project milestones:
a) With the submittal of Grading, Improvement, Landscape, or Building Plans. b) Prior to issuance of Encroachment, Grading, or Building Permits, whichever comes first.
c) Prior to Construction.
d) On going during Construction.
e) Prior to approval of the Final Map.
f) Prior to occupancy approval.

If timing for compliance is not specified, it shall be determined by the Divisions listed after the Condition. (PLNG, BLDG, ENGR)

10. Where a plan or further information is required, it is subject to review and approval by the applicable City Department/Division, as noted at the end of each Condition. The Division listed first shall be the primary contact for implementation of that Condition. (PLNG, BLDG, ENGR)

11. The project shall comply with all applicable Federal and State laws, Responsible Agency(ies) requirements, and Concord Municipal Code (CMC) requirements. (PLNG, BLDG, ENGR)

12. Minor modifications that are found to be in substantial conformance with the approved plans such as colors, plant materials, or minor lot line adjustments, may be approved administratively. Major modifications shall be approved by the applicable decision making body. (PLNG, ENGR)

13. The Conditions of Approval shall be listed on a plan sheet that is included in the construction plan set (Grading, Utility, Landscape, and Building Plans). (PLNG, ENGR)

14. Two annotated copies of the Conditions of Approval specifying how each applicable condition has been satisfied, shall be submitted as follows:
a) At the time Grading, Utility, Landscape, and/or Building Plans are submitted for plan check, whichever comes first.
b) Prior to occupancy approval. (PLNG, ENGR)

15. If deemed necessary by the Planning Division to address neighborhood complaints, the project site and area surrounding the site shall be fenced and maintained in a weed and litter free condition for the period prior to construction. (BLDG, PLNG)

16. Submit a site plan with the parking details for all temporary real estate offices and model homes to Planning and Engineering prior to issuance of Building Permits.

Page 215 of 336 ends

10 17. Existing fencing shall remain around the site during construction or an alternative perimeter fence provided as approved by the City. (PLNG)

ARCHITECTURAL

18. All composition shingle roofing shall be architecturally laminated style with a minimum weight of 280 lbs/square. (PLNG)

19. Vents, gutters, downspouts, flashing, electrical conduits, etc., shall be painted to match the color of the adjacent surface, unless otherwise approved by the Planning Division. (PLNG)

20. All mechanical, electrical, and utility equipment shall be located, screened, or incorporated into the design of the homes so as not to be visible from off-site. Vents, gutters, downspouts, flashing, electrical conduits, etc., shall be painted to match the color of the adjacent surface, unless otherwise approved by the Planning Division. (PLNG)

LANDSCAPING

21. All of the trees shown on the landscape plan date stamp received May 4, 2023, shall be deed restricted to remain onsite in their approved locations and replaced in kind only if they are dying and/or dead as determined by a licensed arborist and as approved by the HOA and the City. Said arborist report and proposed replacement planting shall be approved by the City. (PLNG, PARKS).

22. The applicant shall submit Final Landscape Plans prepared by a licensed Landscape Architect, registered by the State of California, for review and approval with the Grading, Improvement, or Building Plans, whichever comes first, prior to the issuance of any permit. The Plan shall be drawn on or consistent with the Site Plan prepared by the Civil Engineer, with the following information:
a) A legend that lists all plant species (Latin and common name), including size, quantities, spacing, and ultimate height and width.
b) Specifications and details for planting, including staking of trees and planting in bioswales or other stormwater treatment areas. c) Utility information on the base map, screened back.
d) Existing trees to be saved and identification of all replacement trees. e) Trees (minimum size 24-inch box) and shrubs (minimum 5-gallon; accent or subshrubs may be 1-gallon). f) Six-inch vertical concrete curbs around landscaped areas. (PLNG, ENGR)

23. Irrigation Plans shall be submitted with the Final Landscape Plans in compliance with the requirements of CMC Chapter 18.170 “Water Efficient Landscaping” prior to issuance of a building permit. The Final Landscape Plans shall be peer-reviewed by a licensed landscape architect, at the applicant’s expense, for consistency with the approved landscape plans and all applicable landscape and irrigation standards of the Development Code. (PLNG)

Page 216 of 336 ends

11 24. All common area landscaping shall be installed prior to issuance of first certificate of occupancy. Contact the Planning Division at least two weeks prior to Occupancy, to request a site inspection of all exterior improvements including buildings, driveways, parking lots, landscaping, irrigation, lighting, and walls. (PLNG)

25. Prior to occupancy approval, the licensed Landscape Architect shall submit a Landscape Documentation Package with the following mandated elements:
a) Application
b) Certification of Compliance for Landscape Design
c) Certification of Compliance for Landscape Installation d) Certification of Compliance for Landscape Audit
e) Certification of Compliance for Landscape Maintenance f) Water Budget work sheets (if applicable)
g) Landscape Plans
h) Landscape and Maintenance Schedule
i) Provide a signed letter of compliance with the final construction documents stating that the Landscape Architect has met all State and City requirements. (PLNG)

26. Any vegetation damaged or destroyed on adjacent properties during construction shall be replaced with like or comparable plant materials, and if damage occurs off-site, the replacement plants shall be approved by the property owner and the Planning Division, prior to occupancy approval. (PLNG)

27. Submit a fence/wall plan showing the location, design, height, and construction details, for all fencing and walls consistent with, and as a part of, the Grading, Improvement, Landscape, and Building Plans, whichever comes first, and provide a timetable for installation. (PLNG, ENGR)

28. Fences and walls shall be a maximum height of three feet in required front yards and sight visibility triangles, and a maximum height of six feet on side and rear property lines except where otherwise approved. (PLNG) CMC

TREE REMOVAL

29. A Tree Permit may be revoked or modified, as provided in CMC § 18.310.080(C) (Revocation), if it is found that the tree removal, relocation, or protection activities: (1) no longer support the original findings; (2) resulted from misrepresentation or fraud; (3) have not met, or have violated any condition of approval; or (4) constitute a nuisance. (PLNG, CA)

30. Prior to demolition, site preparation, grading, or construction activity on a site with trees to be preserved, the following measures from CMC Chapter 18.310 “Tree Preservation and Protection”, shall be required:
a) All trees to be preserved shall be clearly indicated on the Grading, Utility, Civil Site, and Landscape Plans.

Page 217 of 336 ends

12 b) A temporary six foot fence shall be installed around the drip line of the trees, prior to on-site activity such as grading and construction activities. Prior to grading or construction, the City shall inspect and approve the placement of the fencing. c) No grading, compaction, stockpiling, trenching, paving or change in ground elevation shall be permitted within the drip line of any tree to be saved, until a report prepared by a certified Arborist has been submitted to and approved by the City, providing specific guidelines for each case.
d) No construction waste, either liquid or solid or other substance (oil, gasoline, chemicals, or other harmful materials) shall be deposited, disposed of, or stored, within the drip line or within an area near the tree, which could enter into the root system of the tree.
e) Wires, signs, ropes, pulleys, etc., shall not be attached to any tree. (PLNG, PARKS) CMC

31. The Arborist shall conduct site inspections during grading and construction, and may require additional measures to protect the trees to be preserved, including stopping construction activities, if necessary. (PLNG, PARKS)

32. Comply with the Tree Preservation Guidelines contained in the Arborist Report. One year after occupancy, a Certified Arborist, retained by the applicant at their expense, shall evaluate tree health, vigor and acclamation to the new environment. The Arborist shall identify any tree(s) that is found to be in poor condition due to the impact of construction. The Arborist shall identify measures to restore the tree’s health. If the tree can’t be restored, replacement trees shall be required at a ratio and size consistent with the value of the damaged tree, but no less than a minimum ratio of three to one 36-inch box trees or as otherwise determined by the City. (PARKS, PLNG)

LIGHTING

33. Show all exterior lighting including: building fixtures, walkway lighting, parking lot lighting, and street lights on the Site, Utility, Landscape, and Building Plans, prior to the issuance of the first building permit. The height and style of fixtures shall be shown. Energy-saving fixtures shall be used and noted on the plans. (PLNG, ENGR, BLDG)

34. Submit a Photometric Plan for review and approval, showing the location of all light sources, streetlight spacing, intensity of luminance, and uniformity ratio, in accordance with the City’s specifications, with the Improvement, Utility, or Building Plans, whichever comes first. The photometric analysis shall be reviewed by the Transportation Division for the determination of streetlight spacing. (ENGR, TRANS, BLDG, PD)

35. Photometric Plan shall be consistent with Utility Plan sheet C-9, for the location of the existing pole to be relocated 2’ (min) behind face of curb on Clayton Way. The relevant standards for private residential streets shall be met, including a minimum average illumination of 0.4 fc and a maximum average/minimum ratio of 6. (TRANS)

Page 218 of 336 ends

13 36. Exterior lighting shall be residential in type and character, shielded to minimize glare onto adjacent properties and the public right-of-way, and improve nighttime visibility and safety for pedestrians and vehicles. (ENGR, TRANS, BLDG, PD)

STREET IMPROVEMENTS

37. Construct improvements along the frontage on Clayton Way including but not limited to: driveway; pavement replacement; ADA ramps; concrete curb, gutter and sidewalk; ADA compliant concrete driveway approach; storm drainage system; conforms to existing improvements; and repair/replacement of deficient frontage improvements as determined by the City Engineer, prior to occupancy approval or Acceptance of Improvements. (ENGR)

38. Any trenching for underground utilities shall comply with the modified City Standard Detail S-17 for pavement repair and possible slurry placement. (ENGR)

39. Install “No Parking” signs where parking is prohibited, prior to Acceptance of Improvements or the first Occupancy, whichever comes first. (ENGR, TRANS)

40. Construct all public facilities in accordance with the current Americans with Disabilities Act (ADA), including driveways and curb ramps. (ENGR)

41. Install slurry seal on Clayton Way along the project frontage after completion of utility undergrounding and frontage improvements and prior to the Acceptance of Improvements. (ENGR)

PARKING

42. Parking shall comply with CMC Chapter 18.160 “Parking, Loading, and Access” including motorcycle and bicycle parking spaces, drive aisle and parking space dimensions, turning radii, back-out dimensions, driveway clearances, landscape median dimensions, and other relevant information. (ENGR, PLNG) CMC

43. Standard one-car garages shall be a minimum 10 feet wide by 22 feet deep with nine-foot door opening; standard two-car garages shall be a minimum of 20 feet wide by 22 feet deep with a 16-foot door opening. No interior door shall open into a garage space unless the door will open fully without encroaching into the above-specified areas. (PLNG) CMC

SIGNAGE

44. All signage, including temporary signs, off-site subdivision signs, banners, flags, etc., shall comply with CMC Chapter 18.180 “Signs”. (PLNG) CMC

45. A temporary sign shall be installed onsite with the name, phone number, and email address of a designated contact person available during all construction activities, in the evening, and on weekends to respond to complaints and take actions necessary to address issues. (BLDG,

ENGR, PLNG)

Page 219 of 336 ends

14 NOISE

46. Noise producing site preparation and construction activities shall be limited to the days and hours as set forth below:

Monday through Friday 7:30 a.m. to 6:00 p.m., excluding federal holidays.

Construction on Saturdays may be allowed only upon prior approval by the Building, Engineering, and Planning Divisions. No changes to these construction hours shall be allowed without the prior written consent of the City. (BLDG, ENGR, PLNG)

CONSTRUCTION ACTIVITIES

47. Contact Engineering Services to arrange for a Pre-Construction Meeting prior to issuance of Site Development or Building Permits, whichever comes first. (ENGR)

48. Implement a dust and construction noise control plan as part of the erosion control plan.

Submit the plan to Engineering Services for review and approval prior to issuance of the Grading Permit. (ENGR)

49. Construction equipment shall not be serviced at the site at any time. During construction no deliveries shall be made to the site and no delivery vehicles (including gasoline tanker trucks) shall enter the site between 6:00 p.m. and 7:30 a.m. on weekdays, and between 5:00 p.m. and 8:00 a.m. on weekends and federal holidays. Delivery vehicles shall have their engines turned off during unloading. (BLDG, ENGR, PLNG)

50. Employ the quietest construction equipment available, to muffle noise from construction equipment and keep all mufflers in good working order in accordance with State law. (BLDG,

ENGR, PLNG)

51. Implement the following measures during construction:
a) Gather all construction debris on a regular basis and place them in a dumpster or other container that is emptied or removed on a weekly basis. When appropriate, use tarps on the ground to collect fallen debris or splatters that could contribute to storm water pollution.
b) Remove all dirt, gravel, rubbish, refuse, and green waste from the street pavement, and storm drains adjoining the project site. During wet weather, avoid driving vehicles off paved areas.
c) Broom sweep the public street pavement adjoining the project site on a daily basis.

Caked-on mud or dirt shall be scraped from these areas before sweeping. d) Install filter materials (e.g., sandbags and filter fabric) at the storm drain inlet nearest the downstream side of the site in order to preclude any debris or dirt from flowing into the City storm drain system. Filter materials shall be maintained and/or replaced as necessary to ensure effectiveness and to prevent street flooding. Dispose of filter particles in an approved trash receptacle.

Page 220 of 336 ends

15 e) Create a contained and covered area on the site for the storage of bags, cement, paints, flammable, oils, fertilizers, pesticides, or any other materials used on the site that have the potential for being discharged to the storm drain system by being windblown or in the event of a material spill.
f) Never clean items such as machinery, tools, and brushes or rinse containers in a street, gutter, or storm drain.
g) Ensure that concrete, gunite, plaster, or similar supply trucks do not discharge wash water into street gutters or drains. (ENGR, BLDG)

52. No equipment shall be started or staging area be established on the streets or the site before or after the specified hours of construction. (ENGR, BLDG)

53. Ensure that no debris or construction scrap material is placed on any adjoining lot, open space area, or street, and that any such material stored on an adjoining site shall be completely removed and the site cleaned, prior to occupancy approval. (ENGR, BLDG)

54. At no time shall campers, trailers, motor homes, or any other vehicle be used as living or sleeping quarters on the construction site unless authorized for site security. (ENGR, BLDG)

55. There shall be no parking of construction equipment or construction worker's vehicles on residential streets at any time; all vehicles shall be maintained on-site. (ENGR, BLDG)

56. Portable toilets used during construction shall be kept as far as possible from adjacent properties, public view, and shall be emptied on a regular basis as necessary to prevent odor. (ENGR, BLDG)

57. For trucks over 50 tons, identify truck routes for the import or export of cut/fill material and/or construction debris for review and approval by the City Engineer prior to the issuance of permits. Repair any damage to City streets (private and public) caused by activity associated with this project. (ENGR)

58. In the event an archaeological deposit or human remains be encountered during project subsurface construction activities, all ground-disturbing activities within 25 feet shall be redirected and a qualified archaeologist meeting the Secretary of the Interior’s Professional Qualification Standards for Archaeology shall be contacted to assess the situation, determine if the deposit qualifies as a historical resource, consult with agencies as appropriate, and make recommendations for the treatment of the discovery. If the deposit is found to be significant (i.e., eligible for listing in the California Register of Historical Resources), the applicant shall be responsible for funding and implementing appropriate mitigation measures. If human remains are encountered, the County Coroner shall also be contacted to complete an assessment. All excavation, analysis, and reburial of Native American human remains shall be done in consultation with the Native American Most Likely Descendent, as identified by the California Native American Heritage Commission. (PLNG, ENGR, BLDG)

59. In the event that fossils are encountered, construction shall be temporarily halted, the Planning Division shall be notified immediately, a qualified paleontologist shall evaluate the fossils, and steps needed to photo-document or recover the fossils shall be taken. IF the fossils are found

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16 during construction activities, grading in the vicinity shall be temporarily suspended while the fossils are evaluated for scientific significance and fossil recovery, if warranted. The applicant shall be responsible for all costs associated with the professional investigation and implementation. (PLNG, ENGR, BLDG)

CONSTRUCTION PLAN REVIEW/PRE-PERMIT REQUIREMENTS

60. Submit an electronic copy of a Preliminary Title Report, prepared within three months prior to plan submittal. (ENGR)

61. The proposed buildings are within the Floodplain Zone (X), at a minimum, the project shall comply with the City of Concord Municipal Code requirements in establishing building finished floor elevations. The Grading Plan shall be referenced to the same elevation datum as the FEMA map, and shall show the finished floor elevations of the proposed buildings, 100- year Base Flood Elevations (BFE), and building setback line per CMC. (ENGR) CMC

62. The Improvement Plans shall show frontage improvements including but not limited to:
drainage improvements, curb, gutter and sidewalk per City Standard Detail S-10, and driveway construction per City Standard Detail S-14 and repair/replacement of deficient frontage improvements as determined by the City Engineer. Any unusable existing driveway shall be replaced with standard curb, gutter, and sidewalk per S-10 above. Any trenching for utility installation shall comply with the modified City Standard Detail S-17 for pavement repair and possible slurry placement. (ENGR)

63. Design improvements in accordance with the City Standard Plans S-34 and S-36 for sight distance, sidewalk, back up, fencing, geometrics at intersection and corner setback requirements, prior to the Acceptance of Improvements. Plans shall be subject to review and approval by Engineering Services. (ENGR)

64. Obtain an Encroachment Permit from the City prior to performing any work within the public right-of-way or public easements. (ENGR) CMC

SUBDIVISIONS/SITE DEVELOPMENT PLANS

65. Common areas (e.g. stormwater planters, private roadways, landscaping strips) shall be encompassed by an easement or separate lot, and maintained by the HOA. (ENGR)

66. The Tentative Map received by the Planning Division on May 4, 2023 is not approved for construction. Submit Grading, Erosion Control, Improvement, and Stormwater Control Plans prepared by a Registered Civil Engineer to Engineering Services for review and approval prior to issuance of an Encroachment, Grading, and Building Permit. Where applicable, evidence of compliance with the State General Construction Permit shall be provided. (ENGR)

67. The Final Map shall be prepared by a qualified Civil Engineer or Licensed Land Surveyor and shall be subject to review and approval by Engineering Services. (ENGR)

68. If building occupancy occurs in phases, all physical improvements shall be in place prior to occupancy per an approved phasing plan. No individual unit/house shall be occupied until the

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17 adjoining area is made safe, accessible, provided with all reasonable services and amenities, and completely separated from any remaining construction-related activity. (BLDG, PLNG, ENGR)

69. Approved street names shall be shown on the Final Map prior to recordation of the map. (ENGR, PLNG)

70. Submit a written request for new street names with a site plan showing their location to the Planning Division for review and approval, at the time of submittal of Improvement Plans and Final Map. Include a list of alternatives for each name, as some names may not be acceptable. (PLNG)

71. Contact the Geographic Information Systems (GIS) Technician, in the Information Technology Department, (925) 671-3051, for addressing requirements, and coordinate with the Contra Costa County Fire Protection District for their approval, prior to issuance of a Building Permit. (PLNG)

72. Three copies of project Covenants, Codes and Restrictions (CC&Rs) shall be submitted with the Grading and Improvement Plans and Final Map, for review and approval. The CC&Rs shall include the following provisions and shall be recorded prior to Final Map approval:
a) A Homeowners Association (HOA), shall be formed and shall be responsible in perpetuity, for the maintenance, repair, and replacement of:
i. All parcels and improvements held in common, open space and common area improvements including, private streets, access easements, pedestrian paths, landscaping, irrigation systems, fencing, retaining walls, soundwalls, signage, trash and recycling areas and utilities.
ii. All landscaping and irrigation equipment within the common area and public right-of-way.
iii. All permanent stormwater management facilities included in the approved Stormwater Control Plan and the approved Stormwater Control Operations and Maintenance Plan.
iv. All private sanitary sewer and storm drain lines within the private road or easements.
b) Contain a statement that in the event these areas or facilities are not properly maintained, repaired or replaced according to the approved plans, each property owner shall be responsible for their proportionate share of these costs, secured by a lien on the property in favor of the HOA, in accordance with the HOA procedures. c) Provide reciprocal easements over all common parcels for maintenance purposes. d) The HOA shall be responsible for enforcing the CC&Rs and providing written notice of any violation to the property owners.
e) The HOA shall provide the Planning Division with the name, address and phone number of the current HOA representative. (PLNG, ENGR, CA)

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18 GRADING/EROSION CONTROL/GEOLOGIC

73. Submit a geologic investigation to demonstrate that proposed buildings will not be constructed across active faults. A licensed geologist must prepare an evaluation and written report. If an active fault is found, a structure for human occupancy cannot be placed over the trace of the fault and must be set back from the fault (generally 50 feet). (ENGR)

74. Submit a Geotechnical Report with the Grading Plans and Building Plans, pursuant to CMC Section 16.10.030 and Section 17.20.120 that addresses and provides recommendations for grading, drainage, walls, building foundations, and pavement structural sections. (ENGR)

75. All grading shall require a Grading and Drainage Plan prepared by a registered Civil Engineer, a Soils Report prepared by a registered Geotechnical Engineer and receipt of a Grading Permit approved by the City Engineer. The Grading Plans and Soils Report shall require review by the City’s Geotechnical consultant with all costs to be borne by the applicant. (ENGR)

76. Contour grading techniques shall be employed, to the maximum extent practicable, throughout the project to achieve a more natural appearance, even where this will increase the amount of grading. Tops of cuts or toes of fills adjacent to existing public rights-of-way or easements shall be set back two feet minimum from said rights-of-way and easements. All cut-and-fill slopes in excess of five feet in height shall be rounded both horizontally and vertically. (ENGR)

77. Grading on adjacent properties shall require written approval from the affected property owners. (ENGR)

78. On-site finish grading work shall require drainage to be directed away from adjacent properties and all building foundations at a minimum slope of 2 percent and a maximum slope of 20 percent toward approved drainage facilities or swales. Non-paved drainage swales shall have a minimum slope of 1 percent. (ENGR)

79. The project engineer shall inspect the finished grading and certify that it conforms to the compaction and elevations shown on the Grading Plan and Soils Report. (ENGR) CMC

80. Submit Plot Plan signed and sealed by the project surveyor and soils engineer indicating the building pads were constructed per approved plans, prior to completion of the building pads.

81. At all times seasonally appropriate erosion control measures shall be implemented per plans approved by the City Engineer for all grading work at all times. Wet season measures shall be in place October through April at a minimum and when rain is otherwise predicted. At the time of approval of the Improvement and/or Grading Plans, an approved Erosion Control Plan prepared by a registered Civil Engineer shall be filed with the City Engineer. (ENGR)

82. All graded slopes and stockpiles of loose soil shall be hydromulched/hydroseeded by October of any given year. During grading work between October and April, if rain is forecast, stop all grading work two days before the rain forecast and implement BMPs to insure that the site is protected from erosion. (ENGR)

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19 83. Comply with the applicable provisions of the Grading Ordinance and the Storm Water Management and Discharge Control Ordinance. (ENGR) CMC

84. If the project disturbs an acre or more, provide Waste Discharger Identification (WDID) number on the project cover sheet. (ENGR)

85. The private road(s) referenced as “Parcel A” on the Tentative Subdivision Map, shall be constructed in accordance with City of Concord standards. (ENGR) CMC

86. Designate the private street, if required, as a required fire access lane thereby prohibiting parking on one or both sides of the street at all times. Signs and/or curb striping shall be installed according to the regulations established by the Contra Costa County Fire Protection District, the Concord Police Department, and Engineering Services. The signs shall include, the Police Department telephone number and a notification that a citation may be issued for the violation with vehicle removal at the owner’s expense. (ENGR, CCCFPD, TRANS)

UTILITIES

87. New electrical transformers shall be placed underground or screened from view. (PLNG, ENGR)

88. No above ground utility facilities/structures shall be located between the face of curb and back of sidewalk in the public right-of-way. (ENGR)

89. All the utility lines within the private road(s) referenced as “Parcel A and B” on the Tentative Subdivision Map, shall be private and maintained by the property owners or the Home Owner Association. The City will not accept maintenance of any utility lines within the private right of way. (ENGR)

90. Install streetlights along the private access road frontage. Submit streetlight plans in accordance with the City Standard Specifications showing pole type, luminaries type, conductor and wiring schedule, connection points, lamp wattage and pull box locations, at the time of submittal of improvement plans. Streetlights shall be completely installed and operational prior to occupancy approval. (TRANS)

91. All new utilities shall be constructed underground prior occupancy approval. (ENGR)

92. Coordinate all facility adjustments, relocations, or additions to utility services with the appropriate utility companies. (ENGR)

93. Utility areas, electrical and gas meters shall be screened from view architecturally or with landscaping. (PLNG)

94. The location of all outdoor, above-ground and/or at-grade pad mounted transformers, utility equipment, electrical and gas meters, vaults, irrigation control boxes, back flow prevention devices, and the like shall be subject to approval by Planning and Engineering Services prior to the issuance of the Grading or Building Permit, whichever comes first and shall be located within the private property. All such equipment shall be screened from view either

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20 architecturally or with landscaping and painted forest green or other approved color as approved by the Planning Division. Any changes to the approved Utility Plans, including location or screening details shall be reviewed and approved by the Planning Division. (PLNG, ENGR)

95. Provide cable companies a set of approved site diagrams in electronic format showing the joint trench layout for dry utilities for cable service to be provided to the site. (ENGR)

96. Connect all buildings to the sanitary sewer collection facilities of the City, and pay all current sewer connection and service fees prior to occupancy approval. Fee amounts shall be those in effect at the time of preliminary application submittal pursuant to Government Code Section 65941.1 (November 14, 2022). (ENGR) CMC

97. Submit proof acceptable to Engineering Services that all work within the existing (new) private waterline easement(s) are reviewed and approved by the easement owner of record. (ENGR)
DRAINAGE/STORMWATER C.3 REQUIREMENTS

98. Submit a Stormwater Control Plan (SWCP) prepared in accordance with the current Contra Costa Clean Water Program Stormwater C.3 Guidebook for review and approval by Engineering Services prior to issuance of any permit. The SWCP shall be prepared and certified by a Civil Engineer, registered in the State of California, demonstrating an understanding of the design of treatment measures for water quality and groundwater protection principles applicable to the project site. (ENGR)

99. Prior to issuance of permits for building, site improvements, or landscaping, applicant shall submit a permit application consistent with the applicant’s approved Stormwater Control Plan (SWCP), and include drawings and specifications necessary for construction of site design features, measures to limit directly connected impervious area, pervious pavements, selfretaining areas, treatment BMP's, permanent source control BMP’s, and other features that control stormwater flow and potential stormwater pollutants. The Contra Costa Clean Water Program permit application shall include a completed “Construction Plan C.3 Checklist” as described in the Stormwater C.3 Guidebook, and a detailed draft Stormwater BMP Operation and Maintenance Plan consistent with the general O&M plan included in the applicant’s approved Stormwater Control Plan. Guidelines for the preparation of Stormwater BMP Operation and Maintenance Plans are in Appendix F of the Stormwater C.3 Guidebook. (ENGR)
100. Construct stormwater treatment measures per the approved SWCP prior to occupancy approval. (ENGR)
101. Submit a final Stormwater BMP Operation and Maintenance Plan (O&M Plan) in accordance with City of Concord Guidelines, for review and approval by Engineering Services, prior to issuance of Grading, Encroachment, or Building permits, whichever comes first. This O&M Plan shall incorporate City comments on the draft O&M Plan and any revisions resulting from

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21 changes made during construction. The implementation of the O&M Plan shall be the responsibility of the property owner or the HOA where one exists. (ENGR) 102. Execute any agreements identified in the SWCP which pertain to the transfer of ownership, right-of-entry for inspection or abatement, and/or long-term maintenance of stormwater treatment or hydrograph modification BMPs, prior to issuance of Grading, Encroachment, or Building permits, whichever comes first. (ENGR)
103. Prevent site drainage from draining across sidewalks and driveways in a concentrated manner. (ENGR)
104. Collect and convey all stormwater entering and/or originating from the site to an adequate downstream drainage facility. Submit hydrologic and hydraulic calculations for a 10-year storm with the Improvement Plans to Engineering Services for review and approval. (ENGR) 105. Install City of Concord “No Dumping, Drains to Creek” curb marker (English and Spanish version) on all catch basins Per City of Concord Standard Detail S-39. (ENGR) 106. Include erosion control/storm water quality measures on the final Grading Plan that specifically address measures to prevent soil, dirt, and debris from entering the storm drain system. Such measures may include, but are not limited to, hydroseeding, hay bales, sandbags, and siltation fences and are subject to review and approval of the Engineering Division. The necessary erosion control/storm water quality measures shall be shown on the Site Plan submitted for an on-site permit, subject to review and approval of the Director of Building Inspection. The applicant shall be responsible for ensuring that the contractor is aware of and implements such measures. (ENGR, BLDG)
107. Ensure that the area surrounding the project such as the streets stay free and clear of construction debris such as silt, dirt, dust, and tracked mud coming in from or in any way related to project construction. Areas that are exposed for extended periods shall be watered regularly to reduce wind erosion. Paved areas and access roads shall be swept on a regular basis. All trucks shall be covered. (ENGR)
108. Clean all on-site stormdrain facilities a minimum of twice a year, once immediately prior to October 15 and once in January. Additional cleaning may be required if found necessary by the City Engineer/Director of Building Inspection. (ENGR, BLDG) 109. Submit a Construction Best Management Practice (BMP) Program for review and approval by the Engineering Development Services Department prior to issuance of a Building and/or Grading Permit. The general contractor and all subcontractors and suppliers of materials and equipment shall implement these BMPs. Construction site cleanup and control of construction debris shall also be addressed in this program. Failure to comply with the approved construction BMP may result in the issuance of correction notices, citations, or a project stop work order. (ENGR)

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22 SOLID WASTE/RECYCLING
110. The project shall be designed to ensure compliance with Senate Bill 1383 (SB 1383), subject to review and approval by City and/or Mount Diablo Resource Recovery staff prior to issuance of any building permit.
111. Comply with CMC Chapter 8, Solid Waste, Article III, Construction and Demolition (C&D) Waste Recycling, Section 8.20.400, as applicable. (BLDG) 112. Design and implement City approved Source Reduction/Recycling Plan and demonstrate that interior and exterior refuse enclosures have been sufficiently designed and located for the storage and pick up of recyclable materials in accordance with CMC Section 8.20.260, Source Reduction and Recycling, prior to issuance of a Building Permit. (PW) 113. Comply with the provisions of the CMC, Central Contra Costa Sanitary District and the disposal service regarding access requirements, and the number of required individual refuse receptacles based upon waste pickup schedules.

AGREEMENTS, FEES, BONDS
114. Prior to the issuance of building permits, the applicant shall enter into an affordable housing agreement with the City to facilitate the marketing and sale of one (1) unit to very low-income households. The units will be marketed to very low-income homebuyers, as applicable, through the City’s Below Market Rate Homeownership Program, and the sale price shall be restricted, subject to the affordable housing agreement recorded against the property, for a period of 45 years. Qualified program participants will have an opportunity to purchase the unit at a price set by the City Housing Division as affordable to households of very low-income (up to 50% of Area Median Income). (HSNG)
115. Inclusionary units shall be consistent with CDC Section 18.185.040(F), Design Standards. (HSNG)
116. All fees noted below are the fees currently in effect as of October 25, 2022 per the Resolution of Fees and Charges. The fees and charges are reviewed annually as part of the budget public hearing process. Fee adjustments are based on a number of factors and vary depending on the type of fee:

Service-based fees are adjusted annually based on the San Francisco-San JoseOakland Area Consumer Price Index; Improvement based fees (also called impact fees) are adjusted annually based on Engineering News Record Construction Cost Index (San Francisco Bay Area); and the Parkland Fee is adjusted per Section 19.15 of the Concord Municipal Code.

The fees become effective as of the date set forth in Exhibit A of Resolution No. 78-6042, Fees and Charges for Various Municipal Services, as most recently amended and approved by

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23 the City Council. Persons interested in how a particular fee is calculated should contact the City Department administering the fee or the Finance Department. (ENGR) 117. The applicant shall pay all applicable fees shown on the Resolution of Fees and Charges effective at the time of preliminary application submittal pursuant to Govt. Code Section 65941.1 (November 14, 2022). In the event of any conflict between this condition and any other condition, this condition shall govern. (ENGR)
118. Provide a $5,000 cash deposit to the Planning Division to cover Condition Compliance and Mitigation Monitoring costs, at the time of submittal of plans and documents to Engineering Services or the Building Division for plan check. Planning staff’s time will be charged to this deposit for work performed to implement the Conditions of Approval, from the time of project approval to occupancy approval. The deposit will be placed in a refundable account and any unused funds will be returned upon completion. If the initial deposit is insufficient to cover actual costs, an additional deposit will be required. (PLNG) 119. Prior to approval of the Final Map, submit three signed copies, one notarized, of the City’s “Property Maintenance Agreement”, to ensure on-going repair, replacement and maintenance of all commonly owned exterior and underground improvements by the Homeowners Association including, where applicable, buildings, parking areas, private roads, walkways, landscaping, irrigation, signs, fences, walls, storm drains outside of the public street right of way, street lights and other privately maintained improvements pursuant to CMC Section

17.35.190 “Streets”. (PLNG, ENGR)
120. Enter into a Subdivision Agreement with the City agreeing to construct and complete all improvements necessary to service the subdivision. The Agreement shall be executed and submitted to the City prior to approval of the Final Map. As part of the Agreement, provide securities acceptable to the City, guaranteeing construction of the required improvements. (ENGR)
121. All improvement agreements required in connection with said plans shall be submitted to and approved by the City and other agencies having jurisdiction over said project prior to approval of the Final Map or issuance of the Building or Grading Permit, whichever comes first. (ENGR)
122. All required faithful performance bonds and labor materials bonds in a penal amount equal to 100 percent of the approved estimates of construction costs of improvements shall be submitted to and approved by the City and other agencies having jurisdiction prior to approval of the Final Map or issuance of the Building or Grading Permit, whichever comes first. (ENGR)
123. Site Development Permit Application:
a) Pay the current Filing Fee at the time of submittal of permit application, improvement plans and supporting documents to City Engineering Services for review. b) Provide a restoration security before issuance of the Encroachment Permit. The security shall be in an amount sufficient to restore existing public improvements to a serviceable condition should development improvement activity cause damage. The

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24 amount of the security shall be determined by, and be in a form acceptable to the City Engineer.
c) Pay the current Grading Permit Fees at submittal of a Grading Permit application. The grading permit fees are indicated in fees and charges for various municipal services D.

Permit Center Fees number 20.
d) Provide a $10,000 cash deposit for Erosion Control prior to issuance of Grading Permit. The deposit will be placed in a refundable account. Any unused funds will be returned at project completion. If the initial deposit is insufficient to cover actual costs, an additional deposit in an amount determined by the City Engineer will be required. (ENGR)
124. Final Map Application:
a) Pay the Current Final Map review fee at the time of submittal of Final Map documents to Engineering Services for review. Current review fee is $5,580.00, plus $236.00 per lot.
b) Pay the current Final Map filing fee prior to scheduling the Subdivision Agreement for consideration by the City Council. The current fee is $2,790.00. c) Pay the current Improvement Plan review fee at the time of submittal of Improvement Plans and supporting documents to Engineering Services for review. The current fee is based on the cost evaluation and are indicated in fees and charges for various municipal services D. Permit Center Fees number 23.
d) Pay the current Construction Inspection fee prior to issuance of the Construction Permits or scheduling the Subdivision Agreement for consideration by the City. The current fee is based on the cost evaluation.
e) Pay the current Drainage Acreage Fee prior to scheduling the Subdivision Agreement for consideration by the City Council. The current fee is $2,417.00/acre. (Drainage Area 92).
f) Pay the current Parkland Fee prior to scheduling the Subdivision Agreement for consideration by the City Council. The current fee is $16,691.00 per living unit for Density Designation.
g) Submit a fully executed Subdivision Agreement and provide all necessary bonds, securities, and insurance required in the Agreement prior at the time the Final Map is scheduled for consideration by the City Council. The current subdivision agreement processing fee is $8,694.00.
h) Pay new street monument fee of $314.00 per monument, prior to approval of the Final Map.
i) Pay new parcel fee of $512.00 per parcel prior to the approval of the Final Map. j) Pay acceptance of improvements and dedications fee of $2,049.00 prior to scheduling items for action by City Council.

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25 125. Sewer Connection Permit:
a) Pay the current Sanitary Sewer connection fee. The current sewer connection fee is $5,530.00 per single-family dwelling unit and shall be paid prior to approval of the Final Map.
b) Pay the current sewer service fee prior to approval of the Final Map. The current fee is $760.00 per year and is pro-rated by the month that connection is made. (ENGR) 126. Traffic Mitigation Fee:

Pay Offsite Street Improvement Program (OSIP) fee less possible fee credit. The OSIP fee shall be the fee in effect at the time of preliminary application submittal pursuant to Gov. Code Section 65941 (November 14, 2022). The current OSIP Fee is $3,251.00 per single-family dwelling unit. (TRANS)
127. These Conditions of Approval include and impose certain fees, dedications, reservations, and other exactions. Pursuant to Government Code Section 66020(d)(1), the cover letter that includes these Conditions of Approval constitutes written notice of the statement of the amount of such fees and/or a description of the dedications, reservations, and other exactions imposed on this project and Applicant is hereby notified that the 90-day approval period in which it may protest these fees, dedications, reservation, and other exactions, pursuant to Government Code Section 66020(a), has begun as of the date of the cover letter. If Applicant fails to file a protest within the 90-day period complying with all of the requirements of Section 66020, Applicant will be legally barred from later challenging such fees, dedications, reservation, and other exactions. (CA)

OTHER/MISCELLANEOUS
128. Contact local postal authorities to get their requirements for mail facilities for the project. The design and location of mail receptacles shall be reviewed and approved by the Planning Division and shown on the Utility, Landscape, and Building Plans, prior to issuance of Grading or Building Permits, whichever comes first. Mail facilities shall be installed prior to occupancy approval. (PLNG)
129. The applicant shall apply for a “Change of Address” from the Building Division via the Virtual Permit Center to request a new address(es) for the project site. The request shall be submitted at the time of Improvement Plan and Final Map submittal. (BLDG, ENGR) 130. Comply with the requirements of the Contra Costa County Health Department for the abandonment of existing septic tanks or wells. (ENGR) CMC 131. Comply with the requirements of the Contra Costa Fire Protection District. Submit complete sets of plans and specifications to the Fire District for review and approval at:

Contra Costa County Fire Protection District
4005 Port Chicago Hwy, Ste. 250
Concord CA 94520

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26 Plan review fees are assessed at that time. The City is not responsible for the collection of fees or enforcement of requirements imposed by the Fire District. (CCCFPD) 132. The applicant shall defend (with counsel approved by City), indemnify and hold harmless the City, any agency or instrumentality thereof, and its/their respective agents, officers, officials, volunteers, and employees from and against any and all administrative and/or legal claims, actions or proceedings to attack, set aside, void, or annul approval of the project, including without limitation, any related application, permit, certification, condition, environmental determination, other approval, compliance or failure to comply with applicable laws and regulations, and/or processing methods (“Challenge”), with the exception of a Challenge arising out of the City’s sole negligence or willful misconduct. The City shall have the right to pre-approve any material decision involved in defending any such Challenge, including settlement, and may (but is not obligated to) participate in the defense of any Challenge. If applicant does not promptly defend any Challenge, City may (but is not obligated to) defend such Challenge as City, in its sole discretion, determines appropriate, all at applicant’s sole cost and expense. The applicant shall bear any and all losses, damages, injuries, liabilities, costs, and expenses (including, without limitation, staff time and in-house attorney's fees on a fully-loaded basis, attorney’s fees for outside legal counsel, expert witness fees, court costs, and other litigation expenses) arising out of or related to any Challenge (“Costs”), whether incurred by Developer, City, or awarded to any third party, and shall pay to the City upon demand any Costs incurred by the City. No modification of the project, any application, permit, certification, condition, environmental determination, other approval, change in applicable laws and regulations, or change in processing methods shall alter the applicant’s indemnity obligation. Pursuant to Government Code Section 66474.9, the applicant’s indemnification obligation with respect to any claim, action or proceeding to attack, set aside, void, or annul an approval of City concerning a subdivision (tentative, parcel, or final map application or approval) shall be limited to actions brought within the time period provided for in Government Code Section 66499.37, unless such time period is extended for any reason.

The City shall promptly notify applicant of any Challenge, and shall cooperate fully in the defense. (CA)
133. The permit and approval shall expire in two years from the date on which they became effective unless construction permits are obtained and work has begun. All permits approved concurrently with a Tentative Map shall be valid for the life of the map. The effective date of the permit and approval is July 18, 2023. (PLNG)
134. A request for a time extension from the expiration date of July 18, 2025 can be considered if an application with required fee is filed at least 10 days before the original expiration date, otherwise a new application is required. A public hearing will be required for all extension applications, except those involving only Design Review. Extensions are not automatically approved. Changes in conditions, City policies, surrounding neighborhood, and other factors permitted to be considered under the law, may require, or permit denial. (PLNG)

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Buttonwood Village at Clayton Way
City of Concord, California 94519
May 16, 2023
Project Information:

Building Type: VB
Occupancy: R-3
Address: 1836 Clayton Way
Parcel Number: 114-220-019
Vicinity Map Sheet Index Project Team:

Cover Sheet ..................................................................... CS Conceptual Site Plan ........................................................ SP1 Project Information........................................................... SP2 Streetscene Exhibits ......................................................... SS1 Plan 1 Floor Plans ............................................................ A1.1 Plan 1 Roof Plan .............................................................. A1.2 Plan 1 Exterior Elevations 'A' ............................................ A1.3 Plan 1 Section ................................................................. A1.4 Plan 1X Floor Plans .......................................................... A1X.1 Plan 1X Roof Plan ............................................................ A1X.2 Plan 1X Exterior Elevations 'B'........................................... A1X.3 Plan 1X Section................................................................ A1X.4 Plan 2 Floor Plans ............................................................ A2.1 Plan 2 Roof Plans ............................................................ A2.2 Plan 2 Exterior Elevations 'C'............................................. A2.3 Plan 2 Exterior Elevations 'C' w/ Opt. Covered Patio........... A2.4 Plan 2 Section ................................................................. A2.5 Plan 3 Floor Plans ............................................................ A3.1 Plan 3 Roof Plans ............................................................ A3.2 Plan 3 Exterior Elevations 'B'............................................. A3.3 Plan 3 Exterior Elevations 'B' w/ Opt. Covered Patio........... A3.4 Plan 3 Section ................................................................. A3.5 Architectural Details ......................................................... A4.1 Exterior Color & Materials................................................. CM1.1 Exterior Color & Materials................................................. CM1.2 Exterior Color & Materials................................................. CM1.3 PLAN 3
Elevation B
Color Scheme 4
PLAN 2
Elevation C
Color Scheme 6
PLAN 1
Elevation A
Color Scheme 1
PLAN 1X
Elevation B
Color Scheme 3
ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
Client/Owner: Jeffery B Peters & Darlene Peters
959 Chandler Court
Concord, CA 94518
Client Representative: JP Morris & Company
1460 Laurenita Way
Alamo, CA 94507
Contact: Bob Nichols
925.708.0517
Architect: WHA Architects
5000 Executive Parkway, Suite 375
San Ramon, CA 94582
Contact: Robert Lee & Mark Retherford
925.463.1700
Civil Engineering: Milani & Associates
2655 Stanwell Drive, Suite 105
Concord, CA 94520
Contact: Michael E Milani
925.674.9082
CS
concord blvd
wren ave
clayton way
farm bureau rd
SITE
N.T.S.

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JP MORRIS BUTTONWOOD VILLAGE AT CLAYTON WAY

CONCORD, CA
SP1
0 10 20 40

ILLUSTRATIVE SITE PLAN
1 3
2 5
6 7 8 9
10 13
4 11 12
P3 14
P3R
P2 P3R
P1X P1R P1 P1XR
P2 P3R
P2 P3R P2
P2R
Buttonwood Lane
Clayton Way
Court 'A'
Court 'B'
Elevation 'B'
Color Scheme 3
Elevation 'B'
Color Scheme 4
Elevation 'C'
Color Scheme 6
Elevation 'B'
Color Scheme 3
Elevation 'B'
Color Scheme 3
Elevation 'A'
Color Scheme 2
Elevation 'A'
Color Scheme 1
Elevation 'B'
Color Scheme 4
Elevation 'C'
Color Scheme 6
Elevation 'B'
Color Scheme 3
Elevation 'C'
Color Scheme 5
Elevation 'B'
Color Scheme 4
Elevation 'C'
Color Scheme 6
Elevation 'C'
Color Scheme 5

SIGHT VISIBILITY TRIANGLE PER CITY
OF CONCORD STANDARD DETAIL S-36,
"CORNER AND DRIVEWAY VISIBILITY
REQUIREMENTS"

Page 234 of 336 ends

JP MORRIS BUTTONWOOD VILLAGE AT CLAYTON WAY

CONCORD, CA
SP2
General Plan
Existing Zoning
Proposed Zoning
Gross Site Area (include Lot 1 and 2) ± 1.676 AC s.f.

Net Site Area (Less internal streets) ± 1.355 AC s.f.

Total # of Dwelling Units 14 Dwelling Units 10.33
Base Density (Units per Net Site Area) 13 Dwelling Units 9.59 w/ State Density Bonus 1 State Density Bonus Unit 0.7 Dwelling Unit / Net Ac. 59,043

PROJECT SUMMARY
APN #
RS10 District - Single-Family Residential
73,008
Low Density Residential (LDR)
RS District - Single Family Residential Small lots
114-220-019-3
Dwelling Unit / Net Ac.

Dwelling Unit / Net Ac.

FIRE SPRINKLER SYSTEM Single fire service for each building CONSTRUCTION TYPE Type VB: Building C and D
No projections may occur with a fire separation distance of less than 2'-0" NFPA 13D system
ALLOWABLE # OF STORIES VB = 3 Stories
Projections (eaves and similar elements Non-rated with a fire separation distance of 3'-0" or more per CRC Table R302.1(2)

BUILDING CODE
REFERENCE 2022 California Code: CBC
California Building, Fire, Electrical, Mechanical, Plumbing Codes, CAL Green OCCUPANCY R-3 with attached garage
1 3963 3 1 4 3 2-Car Garage 2626 1727 160 1887 0.44 0.48 75 792 867 2 3901 2 1 4 3 2-Car Garage 2483 1825 205 2030 0.47 0.52 154 773 927 3 3984 3 1 4 3 2-Car Garage 2626 1727 160 1887 0.43 0.47 75 800 875 4 3984 2 1 4 3 2-Car Garage 2483 1825 205 2030 0.46 0.51 154 766 920 5 3860 3 1 4 3 2-Car Garage 2626 1727 160 1887 0.45 0.49 75 768 843 6 2459 1X 1 4 2.5 1-Car Garage 1618 1018 0 1018 0.41 0.41 36 188 225 7 2321 1 1 4 2.5 1-Car Garage 1637 1121 0 1121 0.48 0.48 127 229 356 8 2321 1 1 4 2.5 1-Car Garage 1637 1121 0 1121 0.48 0.48 127 229 356 9 2705 1X 1 4 2.5 1-Car Garage 1618 1018 0 1018 0.38 0.38 36 239 275 10 3860 2 1 4 3 2-Car Garage 2483 1825 205 2030 0.47 0.53 154 773 927 11 3984 3 1 4 3 2-Car Garage 2626 1727 160 1887 0.43 0.47 75 800 875 12 4900 2 1 4 3 2-Car Garage 2483 1825 205 2030 0.37 0.41 154 1424 1578 13 4612 3 1 4 3 2-Car Garage 2626 1727 160 1887 0.37 0.41 75 1538 1613 14 4765 2 1 4 3 2-Car Garage 2483 1825 205 2030 0.38 0.43 154 1406 1560 Total 51,616 13 1 - 32,055 22,038 1,825 23,863 1,472 10,725 12,197 Average 3,687 2,290
Aggregate &
Total Gross
Site Area [3]
73,008 0.30 0.33
Note: [1] Affordable Housing provided 10% @ Very Low Income (VLI) Plan Type Unit Mix Unit Size Total Sq.ft
Plan 1 2 1637 3274
Plan 1X 2 1618 3236
Plan 2 5 2483 12415
Plan 3 5 2626 13130
14 32055
QTY
Market
Rate Private Rear Yard
Space [4]
QTY
Affordable
Housing [1]
Lot Size
Building Coverage
without Opt. Covered
Patio
Lots with Opt.

Covered Patio.

Lots 1, 2, 3, 4, 5,
10, 11, 12,13 and
14 Lot / Site Coverage [2, 3]
Individual &
Aggregate Lot
Coverage without Opt.

Covered Patio
Individual &
Aggregate Lot
Coverage with Opt.

Covered Patio
Total Building
Coverage w/
Covered Patio
included. Lots 1,
2,3,4,5,10,11,12,13
and 14
[2 ] per section 18.155.040(b) Lot Coverage limits apply to individual, subdivided parcels. Lots 2, 4 and 10 is granted a waiver to exceed the individual Lot Coverage (maximum 50%) by up to 3% (maximum 53%). See table above for actual Individual Lot Coverage.

RESIDENTIAL SMALL LOT -UNIT MIX, LOT COVERAGE AND PRIVATE OPEN SPACE [5] per CDC 18.150.100 (C) Private and Open Space Requirement. Development with three or more dwelling units shall provide at least 200 sq. ft. of of private and/or open space per dwelling unit. This requirement may be met by providing a combination of private and common open space as long as each unit has a minimum private open space of 60 sq. ft. [4] per CDC 18.150.100 (F) Private Open Space may include, but not be limited to, decks, balconies, porches, patios, and enclosed yards. Have a minimum dimension of 10 ft. for ground level units and 6 ft. for above-ground units (e.g., balconies).

Front Porch
Area
Sub-Total Private
Open Space per
Lot
Private Open Space [5]
871
[3] per section 18.155.050 (A) Aggregate Lot Coverage: For projects in the RS and RL zones, the sum total coverage of all proposed buildings and structures shall not exceed 40 percent of the gross land area of the subdivision.

Lot Number Plan
Type
Max. # of
Bdrm # of Bath Garage
Total Unit Sq.Ft.
per 2-Story
Dwelling (+/-).

STANDARD RS and RL DISTRICT PROPOSED
Minimum Lot Size (sq. ft.) 1920 [1] 2300 (sq. ft.)
Minimum Lot Width 24 feet 39 feet
Minimum Lot Depth 80 feet 59 feet
Lot Area: Category #1
Standard
Lot Area: Category
#2: Standard
Lot Area: Category
#3: Standard
Lot Area: Category
#1 Provided (Lot #
6 - 9)
Lot Area: Category
#2: Provided ( Lot
# 1-5 & Lot #10,
11)
Lot Area: Category
#3: Provided ( Lot #
12 -14)
Lot Size Range (min.-max.) 1,920 - 2,999 3,000 - 3,999 4,000 - 4,999 2300 - 2682 3,900 - 3,984 4,600 - 4,999 Lot Width (min) 24 feet 30 feet 40 feet 39 feet 47 feet 47 feet Lot Depth (min) 80 feet [2]- Detached.
60 feet - Attached. 80 feet 100 feet 59 feet - Detached. 83 feet 100 feet Aggregate Lot Coverage (max) [3]
Height 35 feet 30 feet 30 feet
Front Setback N/A 10 feet[4] 15 feet [4] 6 feet 10 feet 15 feet Interior Side Setback N/A [5] 3 feet/3 feet [5, 6] 4 feet / 4 feet [6, 7] 4 feet 4 feet 5 feet Street Side Setback 5 feet 6 feet 8 feet 6 feet 6 feet 10 feet Rear Setback [9] N/A [5] 10 feet 15 feet 5 feet 10 feet 20 feet Interior Side Setback
Rear Setback [9]
Height Limit (Max.)
Landscape Planter Strip (Min.) along
Property Line
Notes:
1,920 - 2,999 3,000 - 4,356 4,357 - 5,999 1,920 - 2,999 3,000 - 4,356 4,357 - 5,999 Min. Private Open Space Per Lot
(square feet) 150 sq.ft. 300 sq.ft.

Common Open Space Per Lot
(square feet) [1, 2] 150 sq. ft. 175 sq. ft.

Note:
(*) These requirements supersede the 200 square foot/unit standard established by Chapter 18.150 CDC. [1] For projects with fewer than 10 lots, wider planting strips may be substituted for common open space areas. [2] All subdivisions are also subject to the park land dedication requirements in Chapter 19.20 CMC. Partial credit for common open space may be provided to the allowances set by that chapter. [3] Request Waiver to apply CDC 18.150.100 (C) Private and Open Space Requirements to entire project lots. Developments with three or more dwelling units shall provide at least 200 sq. ft. of private and/or open space per dwelling unit. This requirement may be met by providing a combination of private and common open space as long as each unit has a minimum private open space of 60 sq. ft.

Min. 1,578 sq. ft.

PROVIDED [3]
Average Lot Area (square feet)
[1] Standards are for individual lots and not for the subdivision as a whole. [2] Can be reduced to 60 feet if at least 15 percent of the net developable area on the site is set aside as a single, continguous common open space. 28 percent
Per Chapter 18.155: Table 18.155.050 - Open Space Requirements for Small Lot Subdivisions

TRANSITIONAL STARNDARDS - ADJACENT TO RS OR RR DISTRICTS 8 feet
20 feet
30 feet
8 feet
23 feet
29 feet
5 feet 5 feet
[7] A reduce setback (as low as zero) is acceptable on one side yard; provided, that the sum of both side yard setbacks is at least eight feet. [1] Small lot subdivision in the RL and RS area are subject to maximum density of 10 units per net acre.

SETBACKS (Min.)
Per Chapter 18.155: Table 18.155.040(A) - Minimum Lot Sizes and Dimensions for Small Lots in the RS and RL Zoning Districts Comments
Lot # 7 & 8
Lot # 7 & 8
Lots # 6 - 9
40 percent
29 feet
Per Chapter 18.155: Table 18.155.040(B) - LOT AREA (Square Feet) PROVIDED - LOT AREA (Square Feet) Objective Development Standards for Small Lots
[3] Development in the RL and RS zoning districts are subject to an aggregate lot coverage limit for the entire subdivision. Per CDC 18.155.050(A) Aggregate Lot Coverage: For projects in the RS and RL zones, the sum total coverage of all proposed buildings and structures shall not exceed 40 percent of the gross land area of the subdivision. [4] Additional requirements apply for street-facing garages. See CDC 18.155.060 (H)(8). [5] Additional requirements may apply where the yard abuts an RS or RL zone. See CDC 18l155.050(B). Additionally, side yard setbacks for detached housing units without alleys shall be sufficient width on one side of the house to accommodate side yard trash enclosures and allow for easy maneuvering of waste receptacles in and out of such enclosures. [6] A reduce setback (as low as zero) is acceptable on one side yard; provided, that the sum of both side yard setbacks is at least six feet and one setback is at least four feet. 200 sq.ft.
see CDC 18.150.100
STANDARDS (*)
Min. 204 sq. ft. Min. 843 sq.ft.
[8] A reduce setback (as low as zero) is acceptable on one side yard; provided, that the sum of both side yard setbacks is at least ten feet. [9] The buildings setback from the adjacent RS or RR district properties shall be 20 feet for rear yards for lots 3,000 to 5,999 sq. ft. (Transitional Standards 18.155.050) Parking Spaces LOTS 6-9 LOTS 1-5 & 10-14 Sub-Total
1- Enclosed Garage
Space
4 4
2-Enclosed Garage
Space
20 20
Driveway (Tandem)
Space
4 20 24
Total Spaces 35 8 40 48
Average Space / Unit 2.5 2.0 4.0 3.4
Note:

Onsite spaces may be provided through tandem or uncovered parking, but not on-street parking. Requesting these parking standards does not count as an incentive or concession, a developer may request further parking reductions as an incentive or concession.

2.0 Onsite Parking

2.5 Onsite Parking 14 Units
0 units
Four or more Bedroom Units
State Density Bonus Law- Maximum Parking Requirements
State Density Bonus Law: Maximum Parking PROVIDED
Requirements
Two and Three Bedroom Units

PROJECT INFORMATION

Page 235 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO

BUTTONWOOD VILLAGE AT CLAYTON WAY

JP MORRIS
SS1
0 4 8 16

VIEW ALONG BUTTONWOOD LANE

VIEW ALONG CLAYTON WAY
Buttonwood
Lane

VIEW ALONG COURT 'A'
Buttonwood
Lane PLAN 2
Lot 2
Elevation 'C'
Color Scheme 5
PLAN 2
Lot 2
Elevation 'C'
Color Scheme 5
PLAN 3
Lot 1
Elevation 'B'
Color Scheme 3
PLAN 3
Lot 1
Elevation 'B'
Color Scheme 3
PLAN 1
Lot 8
Elevation 'A'
Color Scheme 1
PLAN 1R
Lot 7
Elevation 'A'
Color Scheme 2
PLAN 1XR
Lot 9
Elevation 'B'
Color Scheme 3
PLAN 1X
Lot 6
Elevation 'B'
Color Scheme 4
PLAN 3R
Lot 3
Elevation 'B'
Color Scheme 4
PLAN 3R
Lot 3
Elevation 'B'
Color Scheme 4
(shown w/ optional covered patio) (shown w/ optional covered patio)

Page 236 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A1.1

JP MORRIS
Key Map NTS

Page 237 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A1.2

JP MORRIS
PLAN 1
Roof Plan

SOLAR ZONE

Page 238 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A1.3

JP MORRIS
PLAN 1
Elevation A
Exterior Materials:

Elevation A (Color Scheme 1)
Roof: Composition Shingles
Stucco
Gable Siding: Fiber Cement
Lap Siding: Fiber Cement
Windows: Insulated Vinyl
Garage Door: Metal Sectional Roll-Up
Entry Door: Fiberglass
Light Fixture: Refer to Sheet CM1.1
1 2
3 4
5 6
7 8
2 5 3 4 1
6 8 7

Page 239 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A1.4

JP MORRIS
T.O.P.

F.F./T.O.C.

T.O.P. T.O.P.

F.F. F.F.

T.O.P.

F.F./T.O.C.
1-CAR GARAGE DINING
BATH 1 BATH 2
ATTIC
C 2022 WILLIAM HEZMALHALCH ARCHITECTS, INC. dba WHA. | 2022231 | 05-04-23

BUTTONWOOD VILLAGE AT CLAYTON WAY

CONCORD, CA
0 2 4 8

JP MORRIS
PLAN 1
A1.4
Section
Sections
PLAN 1
Section

Page 240 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A1X.1

JP MORRIS
Key Map NTS

Page 241 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A1X.2

JP MORRIS
PLAN 1X
Roof Plan

SOLAR ZONE

Page 242 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A1X.3

JP MORRIS
PLAN 1X
Elevation B
Exterior Materials:

Elevation B (Color Scheme 3)
Roof: Composition Shingles
Stucco
Gable Siding: Fiber Cement
Windows: Insulated Vinyl
Shutters: Wood
Brick: Manufactured Veneer
Garage Door: Metal Sectional Roll-Up
Entry Door: Fiberglass
Light Fixture: Refer to Sheet CM1.1
1 2
3 4
5 6
7 8
9 3
1 4 2 8
8 7 5 6

Page 243 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A1X.4

JP MORRIS
T.O.P.

F.F./T.O.C.

T.O.P. T.O.P.

F.F. F.F.

T.O.P.

F.F./T.O.C.
1-CAR GARAGE DINING
BATH 1 BATH 2
ATTIC
C 2022 WILLIAM HEZMALHALCH ARCHITECTS, INC. dba WHA. | 2022231 | 05-04-23

BUTTONWOOD VILLAGE AT CLAYTON WAY

CONCORD, CA
0 2 4 8

JP MORRIS
PLAN 1X
A1X.4
Section
Sections
PLAN 1X
Section

Page 244 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A2.1

JP MORRIS
Key Map NTS

Page 245 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A2.2

JP MORRIS
PLAN 2
Roof Plan

SOLAR ZONE

Page 246 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A2.3

JP MORRIS
PLAN 2
Elevation C
Exterior Materials:

Elevation C (Color Scheme 5)
Roof: Composition Shingles
Stucco
Lap Siding: Fiber Cement
Windows: Insulated Vinyl
Shutters: Wood
Garage Door: Metal Sectional Roll-Up
Entry Door: Fiberglass
Light Fixture: Refer to Sheet CM1.1
1 2
3 4
5 6
7 8
1 5 3 4
2 6 8 7

Page 247 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A2.4

JP MORRIS
PLAN 2
Elevation C
w/ Opt. Covered Patio
w/ Opt. Covered Patio
w/ Opt. Covered Patio

Page 248 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A2.5

JP MORRIS
T.O.P.

F.F./T.O.C.

T.O.P. T.O.P.

F.F. F.F.

T.O.P.

F.F./T.O.C.
2-CAR GARAGE
BEDROOM 2
ATTIC

LAUNDRY
C 2022 WILLIAM HEZMALHALCH ARCHITECTS, INC. dba WHA. | 2022231 | 05-04-23

BUTTONWOOD VILLAGE AT CLAYTON WAY

CONCORD, CA
0 2 4 8

JP MORRIS
PLAN 2
A2.5
Section
Sections
PLAN 2
Section

Page 249 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A3.1

JP MORRIS
Key Map NTS

Page 250 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A3.2

JP MORRIS
PLAN 3
Roof Plan

SOLAR ZONE

Page 251 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A3.3

JP MORRIS
PLAN 3
Elevation B
Exterior Materials:

Elevation B (Color Scheme 4)
Roof: Composition Shingles
Stucco
Windows: Insulated Vinyl
Brick: Manufactured Veneer
Garage Door: Metal Sectional Roll-Up
Entry Door: Fiberglass
Light Fixture: Refer to Sheet CM1.1
1 2
3 4
5 6
7 1 2 3
7 5 4 6

Page 252 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A3.4

JP MORRIS
PLAN 3
Elevation B
w/ Opt. Covered Patio
w/ Opt. Covered Patio w/ Opt. Covered Patio

Page 253 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A3.5

JP MORRIS
T.O.P.

F.F./T.O.C.

T.O.P. T.O.P.

F.F. F.F.

T.O.P.

F.F./T.O.C.

W/H KITCHEN
LAUNDRY BATH 2
ATTIC

PANTRY ENTRY
C 2022 WILLIAM HEZMALHALCH ARCHITECTS, INC. dba WHA. | 2022231 | 05-04-23

BUTTONWOOD VILLAGE AT CLAYTON WAY

CONCORD, CA
0 2 4 8

JP MORRIS
PLAN 3
A3.5
Section
Sections
PLAN 3
Section

Page 254 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY A4.1

JP MORRIS
Architectural Details
C 2022 WILLIAM HEZMALHALCH ARCHITECTS, INC. dba WHA. | 2022231 | 05-02-23 ARCHITECTS . PLANNERS . DESIGNERS
ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO

BUTTONWOOD VILLAGE AT CLAYTON WAY

CONCORD, CA
0 2 4 8

JP MORRIS
A4.1

SECTION DETAILS

TYPICAL ROOF DETAILS - COMPOSITION SHINGLE ROOF

VALLEY RIDGE/HIP
DIM. PER ROOF
MFR.

ROOF TO WALL 1" 3"
2 932"
2" MIN.

LAP
3"
21 2
"
MIN.
2"
MIN.

RAKE TO WALL
2 1
2 "
MIN.

WINDOW SILL

WINDOW HEAD
2x BLOCKING

WHERE OCCURS
GYP. BD.

INSULATION
SEALANT, PER SPECS.
1 4
"
SL.

SEALANT, PER SPECS.

WINDOW FRAME
DOUBLE 2x SILL

WINDOW INSTALLATION

WOOD TRIM

FLASHING PER WINDOW

INSTALLATION
12" SELF-ADHERED RAINBUSTER

WATERPROOFING MEMBRANE
6''

WINDOW FRAME

WHERE OCCURS

INSULATION
HEADER
GYP. BD.

SEALANT- EACH SIDE PER SPECS
2X BLOCKING
2X4, SPRUCE, ROUGH SAWN, KILN
DRIED TRIM, PRE-PRIMED.

WINDOW FLASHING INSTALLATION
12" SELF-ADHERED RAINBUSTER

WATERPROOFING MEMBRANE
SL.
(2) LAYER 60 MIN. GRADE 'D' BLDG.

PAPER

METAL FLASHING WITH

DRIP (EXTEND FLASHING

WHERE OCCURS)

FIBER CEMENT PANEL PER
ELEV.
1X3 FIBER CEMENT BATTENS
@ 16" O.C. (U.N.O.)
1/4''
TYP.

PER PLAN

WINDOW MULLION
NOTE:

1. ALL DRYWALL CORNERS ARE BULLNOSE.

2. ELEVATION TRIM PROFILES AND ACTUAL TRIM STYLES TO MATCH ELEVATION SHEETS.

3. CONTRACTOR TO CONSTRUCT AND CERTIFY THAT EXTERIOR OPENINGS EXPOSED TO THE WEATHER SHALL BE FLASHED IN SUCH A MANNER AS TO MAKE THEM WEATHER-RESISTANT PER CRC SECTION R703.1, FLASHING AND COUNTER FLASHING.
(2) LAYERS 60 MIN. GRADE
'D' BUILDING PAPER

FIBER CEMENT PANEL PER
ELEV.
1X3 FIBER CEMENT BATTENS
@ 16" O.C. (U.N.O.)
1-1/2''
TYP.

SL.

STUCCO BASE AND FINISH

HEADER PER
GYP. BD.

INSULATION WHERE
WOOD

WEATHERSTRIP
DOOR
CASING

STUCCO 'J' MOLD

WOOD DOOR FRAME

SET IN SEALANT
1" RIGID FOAM
OCCURS

WINDOW FRAME

CONTINUOUS BEAD

VAPOR BARRIER

STUCCO 'J' MOLD
FRAME

WOOD DOOR
1"
TYP.

BULDING PAPER 1"
TYP.

MFR. INSTRUCTIONS

COLOR COAT OVER

RIGID FOAM TRIM -
SIZE PER ELEV.-

OVER STUCCO BASE

COAT-INSTALL PER

WHERE OCCURS -

DOOR/WINDOW

DOOR HEAD

STUCCO BASE AND FINISH

DOOR HEAD/JAMB DETAIL
2X4 WALL WITH STUCCO

WEATHERSTRIP
DOOR

PER PLAN
GYP. BD.
2X FRAMING

WOOD CASING

DIMENSION
STRUCT.

OF SEALANT

SEALANT

VAPOR BARRIER
1 4
"
1 4
"

SET IN SEALANT

COATS OVER GALVANIZED

METAL LATH

COATS OVER GALVANIZED

METAL LATH

BULDING PAPER
1" RIGID FOAM
MFR. INSTRUCTIONS

COLOR COAT OVER

RIGID FOAM TRIM -
SIZE PER ELEV.-

OVER STUCCO BASE

COAT-INSTALL PER

WHERE OCCURS -
3"=1'-0" 3"=1'-0" 3"=1'-0"
2X3 (U.N.O.) OVER 2X4, SPRUCE,

ROUGH SAWN, KILN DRIED TRIM,
PRE-PRIMED. ASSEMBLE TWO-PIECE

TRIM PRIOR TO INSTALLATION AT

WINDOW SILL

TYPICAL WINDOW TRIM

ELEVATION B

ELEVATION A
TYP. ENTRY DOOR TRIM

ELEVATION C
6"
6"
2"
2"
3"
2"
3"
2"
3"
2"
6"
6"
4" 2"
4"
4" 2"
4"
4"
4"
4" 2" 4" 2"
4"
4"
4" 2"
4"
4"
4"
4"

ELEVATION B

ELEVATION A

ELEVATION C
2"=1'-0" 2"=1'-0"

DOOR & WINDOW TRIMS

Page 255 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY CM1.1

JP MORRIS
Lighting Fixtures
Elevation B
Plans 1X & 3
Elevation A
Plan 1
Elevation C
Plan 2
Manufacturer: Sea Gull Lighting (or similar)
(One Light Outdoor Wall Lantern)
Product Number: 88240EN3-12
Finish: Black
Dimensions: W: 7” H 10 1/2”
Manufacturer: Generation Lighting (or similar)
(One Light Outdoor Wall Lantern)
Product Number: 8737401EN3-12
Finish: Black
Dimensions: W: 14” H 13 1/2”
Manufacturer: Sea Gull Lighting (or similar)
(One Light Outdoor Wall Lantern)
Product Number: 8652701-12
Finish: Black
Dimensions: W: 8 1/4” H 14”

Page 256 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY CM1.2

BUTTONWOOD VILLAGE AT CLAYTON WAY EXTERI
Concord, California

JP MORRIS
January 13, 2023 | 2022231
ROOFING - GAF Grand Canyon Shingles: Black Oak
ROOFING - GAF Grand Canyon Shingles: Stonewood
COLOR SCHEME 1 - ‘A’ ELEVATIONS ONLY COLOR SCHEME 3 - ‘B’ ELEVATIONS ONLY COLOR SCHEME 5 - ‘C’ ELE COLOR SCHEME 2 - ‘A’ ELEVATIONS ONLY COLOR SCHEME 4 - ‘B’ ELEVATIONS ONLY COLOR SCHEME 6 - ‘C’ ELE ROOFING - GAF Grand Canyon Shingles: Stonewood
ROOFING - GAF Grand Canyon Shingles: Black Oak
ROOFING - GAF Grand Canyon Shingles: Storm Cloud

FASCIA, TRIM

FRONT DOOR, SHUTTERS

GARAGE DOOR
STUCCO

FASCIA, GARAGE DOOR, TRIM SIDING

BRICK FRONT DOOR, SHUTTERS

GARAGE DOOR, TRIM STUCCO
FASCIA

FASCIA, FRONT DOOR

FRONT DOOR

SIDING, STUCCO
BRICK
STUCCO

STUCCO, GARAGE DOOR, TRIM STUCCO

SIDING SIDING
ROOFING - GAF Grand Canyon Shingles: Mission Brown
Concord, California

JP MORRIS
January 3, 2023 | 2022231
PAGE 1 OF 9
REVISIONS:

Number Date Description
1 1/13/23 Revise roofing specification to GAF Grand Canyon Shingles.

Exterior Color & Materials
SCHEME 1 OF 6 ‘A’ ELEVATIONS ONLY
Material Color Manufacturer
Roofing:

Composition Shingles
1 Stonewood
1 Grand Canyon Shingles GAF
Vinyl Windows (factory finish) White Milgard (or equal) Gutters & Downspouts Match Adjacent Color Sherwin Williams Corner Boards Match Adjacent Color Sherwin Williams
Siding Color (applied to):

Lap Siding
Stucco
SW 6207
Retreat Sherwin Williams
Trim Color #1 (applied to):

Braces
Gable Siding
Garage Door
Posts
Pot Shelves
Secondary Doors
Trim
SW 7105
Paperwhite Sherwin Williams
Trim Color #2 (applied to):

Barge Boards
Corbels
Eaves
Fascia
Front Door
SW 6041
Otter Sherwin Williams
Garage Door Weatherstrip (factory finish) Match Garage Door Color TBD NOTE: Notify WHA if any variation occurs between these
schemes and the construction documents prior to purchase.

BUTTONWOOD VILLAGE AT CLAYTON WAY
Concord, California

JP MORRIS
January 3, 2023 | 2022231
PAGE 2 OF 9
ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
REVISIONS:

Number Date Description
1 1/13/23 Revise roofing specification to GAF Grand Canyon Shingles.

Exterior Color & Materials
SCHEME 2 OF 6 ‘A’ ELEVATIONS ONLY
Material Color Manufacturer
Roofing:

Composition Shingles
1 Black Oak
1 Grand Canyon Shingles GAF
Vinyl Windows (factory finish) White Milgard (or equal) Gutters & Downspouts Match Adjacent Color Sherwin Williams Corner Boards Match Adjacent Color Sherwin Williams
Siding Color (applied to):

Lap Siding
SW 9163
Tin Lizzie Sherwin Williams
Trim Color #1 (applied to):

Gable Siding
Garage Door
Posts
Secondary Doors
Stucco
Trim
SW 7012
Creamy Sherwin Williams
Trim Color #2 (applied to):

Barge Boards
Eaves
Fascia
SW 7674
Peppercorn Sherwin Williams
Accent Color (applied to):

Front Door
SW 7595
Sommelier Sherwin Williams
Garage Door Weatherstrip (factory finish) Match Garage Door Color TBD NOTE: Notify WHA if any variation occurs between these
schemes and the construction documents prior to purchase.

Exterior Color & Materials
Elevation 'A'

Page 257 of 336 ends

ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
BUTTONWOOD VILLAGE AT CLAYTON WAY CM1.3

JP MORRIS
ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO

AT CLAYTON WAY EXTERIOR COLOR & MATERIALS
ROOFING - GAF Grand Canyon Shingles: Black Oak
ROOFING - GAF Grand Canyon Shingles: Stonewood
1 - ‘A’ ELEVATIONS ONLY COLOR SCHEME 3 - ‘B’ ELEVATIONS ONLY COLOR SCHEME 5 - ‘C’ ELEVATIONS ONLY 2 - ‘A’ ELEVATIONS ONLY COLOR SCHEME 4 - ‘B’ ELEVATIONS ONLY COLOR SCHEME 6 - ‘C’ ELEVATIONS ONLY Stonewood
Black Oak
ROOFING - GAF Grand Canyon Shingles: Storm Cloud

FASCIA, GARAGE DOOR, TRIM

FASCIA, TRIM

SHUTTERS

FRONT DOOR, SHUTTERS

FRONT DOOR

GARAGE DOOR
STUCCO

FASCIA, GARAGE DOOR, TRIM SIDING

BRICK FRONT DOOR, SHUTTERS

GARAGE DOOR, TRIM STUCCO

FASCIA FASCIA, GARAGE DOOR, TRIM

FASCIA, FRONT DOOR

FRONT DOOR FRONT DOOR, SHUTTERS
BRICK
STUCCO
STUCCO
SIDING
ROOFING - GAF Grand Canyon Shingles: Mission Brown
Concord, California

JP MORRIS
January 3, 2023 | 2022231
PAGE 3 OF 9
Exterior Color & Materials
SCHEME 3 OF 6 ‘B’ ELEVATIONS ONLY
REVISIONS:

Number Date Description
1 1/13/23 Revise roofing specification to GAF Grand Canyon Shingles.

Material Color Manufacturer
Roofing:

Composition Shingles
1 Black Oak
1 Grand Canyon Shingles GAF
Vinyl Windows (factory finish) White Milgard (or equal) Manufactured Thin Brick & Cap Midnight Smoke H.C. Muddox Grout @ Brick Soft White Orco
Gutters & Downspouts Match Adjacent Color Sherwin Williams Stucco Color SW 9171
Felted Wool Sherwin Williams
Trim Color (applied to):

Barge Boards
Braces
Corbels
Eaves
Fascia
Gable Vents
Garage Door
Secondary Doors
Trim
SW 9180
Aged White Sherwin Williams
Accent Color (applied to):

Front Door
Shutters
SW 7069
Iron Ore Sherwin Williams
Garage Door Weatherstrip (factory finish) Match Garage Door Color TBD NOTE: Notify WHA if any variation occurs between these
schemes and the construction documents prior to purchase.

BUTTONWOOD VILLAGE AT CLAYTON WAY
Concord, California

JP MORRIS
January 3, 2023 | 2022231
PAGE 4 OF 9
ORANGE COUNTY . LOS ANGELES . BAY AREA . SACRAMENTO
Exterior Color & Materials
SCHEME 4 OF 6 ‘B’ ELEVATIONS ONLY
REVISIONS:

Number Date Description
1 1/13/23 Revise roofing specification to GAF Grand Canyon Shingles.

Material Color Manufacturer
Roofing:

Composition Shingles
1 Stonewood
1 Grand Canyon Shingles GAF
Vinyl Windows (factory finish) White Milgard (or equal) Manufactured Thin Brick & Cap Coventry H.C. Muddox
Grout @ Brick Soft White Orco
Gutters & Downspouts Match Adjacent Color Sherwin Williams Stucco Color SW 7558
Medici Ivory Sherwin Williams
Trim Color #1 (applied to):

Barge Boards
Braces
Corbels
Eaves
Fascia
Gable Vents
Secondary Doors
Trim
SW 7675
Sealskin Sherwin Williams
Trim Color #2 (applied to):

Gable Siding
Garage Door
SW 7033
Brainstorm Bronze Sherwin Williams
Accent Color (applied to):

Front Door
Shutters
SW 9184
Foxhall Green Sherwin Williams
Garage Door Weatherstrip (factory finish) Match Garage Door Color TBD NOTE: Notify WHA if any variation occurs between these
schemes and the construction documents prior to purchase.

Exterior Color & Materials
Elevation 'B'

Page 258 of 336 ends

Concord City CouncilOctober 24, 2023

Concord City Council
October 24, 2023