San Marcos City Council
September 9, 2025

Project: 22-119 Woodward 46 AQ

AIR QUALITY ASSESSMENT

Woodward 46 Specific Plan
SP22-0005, SP22-0006, GPA22-0004, MFSD22-0005, TSM22-0004 City of San Marcos, CA

Prepared for:

City of San Marcos
1 Civic Center Drive
San Marcos, CA 92069

Prepared By:

42428 Chisolm Trail
Murrieta, CA 92562

January 7, 2025
Ldn Cotallt/ng, Inc.
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TABLE OF CONTENTS

TABLE OF CONTENTS ............................................................................................................................ II LIST OF FIGURES .................................................................................................................................. III LIST OF TABLES ................................................................................................................ ................... III APPENDIX ........................................................................................................................................... III LIST OF COMMON ACRONYMS ............................................................................................................ IV

1.0 INTRODUCTION ....................................................................................................................... 1

1.1 PROJECT DESCRIPTION ..................................................................................................................................... 1

1.2 PROJECT LOCATION ......................................................................................................................................... 1

1.3 PURPOSE OF THIS STUDY .................................................................................................................................. 1

2.0 EXISTING ENVIRONMENTAL SETTING ....................................................................................... 4

2.1 EXISTING SETTING ........................................................................................................................................... 4

2.2 CLIMATE AND METEOROLOGY ........................................................................................................................... 5

2.3 REGULATORY STANDARDS ................................................................................................................................. 5

2.3.1 FEDERAL STANDARDS AND DEFINITIONS .............................................................................................................. 5

2.3.2 STATE STANDARDS AND DEFINITIONS .................................................................................................................. 7

2.3.3 REGIONAL STANDARDS ..................................................................................................................................... 9

2.4 CALIFORNIA ENVIRONMENTAL QUALITY ACT (CEQA) SIGNIFICANCE THRESHOLDS ..................................................... 10

2.5 SDAPCD RULE 20.2 – AIR QUALITY IMPACT ASSESSMENT SCREENING THRESHOLDS ................................................ 11

2.6 LOCAL AIR QUALITY ....................................................................................................................................... 12

3.0 METHODOLOGY ..................................................................................................................... 14

3.1 CONSTRUCTION EMISSIONS CALCULATIONS ........................................................................................................ 14

3.2 CONSTRUCTION ASSUMPTIONS ........................................................................................................................ 15

3.3 OPERATIONAL EMISSIONS ............................................................................................................................... 17

3.4 ODOR IMPACTS ............................................................................................................................................ 17

4.0 FINDINGS ............................................................................................................................... 18

4.1 CONSTRUCTION FINDINGS .............................................................................................................................. 18

4.2 HEALTH RISK ................................................................................................................................................ 19

4.3 ODOR IMPACT FINDINGS ................................................................................................................................ 20

4.4 OPERATIONAL FINDINGS ................................................................................................................................. 20

4.5 CUMULATIVE IMPACTS ................................................................................................................................... 21

4.6 CONCLUSION OF FINDINGS .............................................................................................................................. 22

5.0 REFERENCES .......................................................................................................................... 24

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List of Figures

FIGURE 1-A: PROPOSED PROJECT SITE DEVELOPMENT PLAN ................................................................ 2 FIGURE 1-B: PROJECT VICINITY MAP..................................................................................................... 3 FIGURE 2-A: EXISTING SITE LAYOUT ..................................................................................................... 4

List of Tables

TABLE 2.1: AMBIENT AIR QUALITY STANDARDS .................................................................................. 8 TABLE 2.2: SAN DIEGO COUNTY AIR BASIN ATTAINMENT STATUS BY POLLUTANT ............................. 10 TABLE 2.3: SCREENING LEVEL THRESHOLDS FOR CRITERIA POLLUTANTS ............................................ 11 TABLE 2.4: TWO-YEAR AMBIENT AIR QUALITY SUMMARY NEAR THE PROJECT SITE ........................... 13 TABLE 3.1: EXPECTED CONSTRUCTION EQUIPMENT .......................................................................... 16 TABLE 4.1: EXPECTED CONSTRUCTION EMISSIONS SUMMARY .......................................................... 19 TABLE 4.2: DAILY POLLUTANT GENERATION (SUMMER) ..................................................................... 20 TABLE 4.3: DAILY POLLUTANT GENERATION (WINTER) ....................................................................... 21

Appendix

CALEEMOD ........................................................................................................................................ 26 AERSCREEN FOR PM10 EXHAUST ......................................................................................................... 84 CANCER RISK CALCULATIONS ............................................................................................................. 90

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LIST OF COMMON ACRONYMS

Air Quality Impact Assessments (AQIA)
Assembly Bill 32 (AB32)
California Air Resource Board (CARB)
California Ambient Air Quality Standards (CAAQS)
California Environmental Quality Act (CEQA)
Carbon Dioxide (CO2)
Cubic Yards (CY)
Diesel Particulate Matter (DPM)
Environmental Protection Agency (EPA)
EPA Office of Air Quality Planning and Standards (OAQPS) Hazardous Air Pollutants (HAPs)
Hydrogen Sulfide (H2S)
International Residential Code (IRC)
Level of Service (LOS)
Low Carbon Fuel Standard (LCFS)
Methane (CH4)
National ambient air quality standards (NAAQS)
Nitrous Oxide (N2O)
Reactive Organic Gas (ROG)
Regional Air Quality Strategy (RAQS)
San Diego Air Basin (SDAB)
San Diego Air Pollution Control District (SDAPCD)
South Coast Air Quality Management District (SCAQMD)
Specific Plan Area (SPA)
State Implementation Plan (SIP)
Toxic Air Contaminants (TACs)
Vehicle Miles Traveled (VMT)

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1.0 INTRODUCTION

1.1 Project Description

The project proposes implementation of a Specific Plan to construct 46 multi-family residential units on an 8.57 acre site. Construction would be expected to start sometime in 2025 and be completed as early as late 2026 with full op erations expected in 2027. The project development plan is shown in Figure 1-A.

1.2 Project Location

The vacant 8.57-acre project site having an Assessor Parcel Number (APN) of 220-210-49 is l o c a t e d a l o n g W o o d w a r d S t r e e t n o r t h o f E a s t M i s s i o n R o a d i n t h e C i t y o f S a n M a r c o s .

Regionally, the Specific Plan area is located approximately a half m ile north of Highway 78 and approximately 3.5 miles from Interstate 15 . The Civic Center SPRINTER rail station is located approximately 0.1-mile from the Specific Plan area at the intersection of Mission Road and San Marcos Boulevard. A project vicinity map is shown in Figure 1-B. Residential uses exist to the south, and east of the Project site. To the north of the project site is an area identified as Open Space in the General Plan, with additional residences north of that.

1.3 Purpose of this Study

The purpose of this Air Quality study is to de termine potential significant air quality impacts (if any) that may be generated by constructi on, area or operational emissions from the proposed Project. Should impacts be determined, the intent of this study would be to recommend suitable mitigation measures to bring those impact s to a level that would be considered less than significant under the California Environmental Quality Act (CEQA).

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Figure 1-A: Proposed Project Site Development Plan

Source: (Summa Architecture, 2023)
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Figure 1-B: Project Vicinity Map

Source: (Google, 2023)
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2.0 EXISTING ENVIRONMENTAL SETTING

2.1 Existing Setting

The vacant undeveloped Project site is located north of East Mission Road and east of Woodward Street. The project site is a rocky hilly area with elevations ranging from about 630 to 730 feet above mean sea leve l. The existing site aerial map is shown in Figure 2-A.

The project is mostly surrounded by residential uses with the closest less than 100 feet to the south or east.

Figure 2-A: Existing Site Layout

Source: (Google Earth Pro, 2023)
Project Site

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2.2 Climate and Meteorology

Climate within the San Diego Air Basin (SDAB) area often varies dramatically over short geographical distances with cooler temperatures on the western coast gradually warming to the east as prevailing winds from the west heats up. Most of southern California is dominated by high-pressure systems for much of the year, which keeps San Diego mostly sunny and warm. Typically, during the winter months, the high-pressure systems drop to the south and brings cooler, moister weather from the north.

Meteorological trends within the area generally show daytime highs ranging between 64ºF in the winter to approximately 88ºF in the summer with August usually being the hottest month.

Daytime Low temperatures range from approximately 37ºF in the winter to approximately 59ºF in the summer. Precipitation is generally about 16.2 inches per year (WRCC, 2021).

Prevailing wind patterns for the area vary duri ng any given month during the year and also vary depending on the time of day or night. The predominant pattern though throughout the year is usually from the west or westerly (WRCC, 2018).

2.3 Regulatory Standards

2.3.1 Federal Standards and Definitions

The Federal Air Quality Standards were developed per the requirements of The Federal Clean Air Act, which is a federal law that was passe d in 1970 and further amended in 1990. This law provides the basis for the national air pollution control effort. An important element of the act included the development of national ambient air quality standards (NAAQS) for major air pollutants.

The Clean Air Act established two types of air quality standards otherwise known as primary and secondary standards.

Primary Standards set limits to protect public health which includes sensitive populations such as asthmatics, children and elderly. Secondary Standards set limits to protect pub lic welfare and include prot ection against decreased visibility, damage to animals, crops, vegetation and buildings.

The Environmental Protection Agency’s (EPA O ffice of Air Quality Planning and Standards (OAQPS) has set National Ambient Air Quality Standards (NAAQS) for principal pollutants, which are called "criteria" pollutants. These pollutants are defined below (EPA, 2022):

1. Carbon Monoxide (CO): is a colorless, odorless, and tasteless gas and is produced from the partial combustion of carbon-containing compounds, notably in internal-combustion engines. Carbon monoxide usually forms when there is a reduced availability of oxygen

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present during the combustion process. Exposure to CO near the levels of the ambient air quality standards can lead to fatigue, headaches, confusion, and dizziness. CO interferes with the blood's ability to carry oxygen (EPA, 2022).

2. Lead (Pb): is a potent neurotoxin that accumulates in soft tissues and bone over time.

The major sources of lead emissions have hist orically been motor vehicles (such as cars and trucks) and industrial sources. Because lead is only slowly excreted, exposures to small amounts of lead from a variety of sources can accumulate to harmful levels. Effects from inhalation of lead near the level of the ambient air quality standard include impaired blood formation and nerve conduction. Lead can adversely affect the nervous, reproductive, digestive, immune, and blood-f orming systems. Symptoms can include fatigue, anxiety, short-term memory loss, de pression, weakness in the extremities, and learning disabilities in children (EPA, 2022).

3. Nitrogen Dioxide (NO2): is a reactive, oxidizing gas capable of damaging cells lining the respiratory tract and is one of the nitrogen oxides emitted from high-temperature combustion, such as those occurring in trucks, cars, power plants, home heaters, and gas stoves. In the presence of other air contaminants, NO2 is usually visible as a reddish-brown air layer over urban areas. NO2 along with other traffic-related pollutants is associated with respiratory symptoms, respirat ory illness and respiratory impairment. Studies in animals have reported biochemical, structural, and ce llular changes in the lung when exposed to NO2 above the level of the current state air qu ality standard. Clinical studies of human subjects suggest that NO 2 exposure to levels near the cu rrent standard may worsen the effect of allergens in allergic asthmatics, especially in children (EPA, 2022).

4. Particulate Matter (PM10 or PM2.5): is a complex mixture of tiny particles that consists of dry solid fragments, solid cores with liquid coatings, and small droplets of liquid. These particles vary in shape, size and chemical co mposition, and can be made up of multiple materials such as metal, soot, soil, and dust. PM 10 particles are 10 microns ( μm) or less and PM 2.5 particles are 2.5 ( μm) or less. These particles can contribute significantly to regional haze and reduction of visibility in California. Exposure to PM levels exceeding current air quality standards increases the risk of allergies such as asthma and respiratory illness (EPA, 2022).

5. Ozone (O3): Ozone at the ground level is a high ly oxidative unstable gas capable of damaging the linings of the respiratory trac t. This pollutant forms in the atmosphere through reactions between chemicals directly emitted from vehicles, industrial plants, and many other sources. Exposure to ozone above ambient air quality standards can lead to human health effects such as lung inflamma tion, tissue damage and impaired lung functioning. Ozone can also damage materials such as rubber, fabrics and plasticsInvalid source specified..

It should be noted that Oxides of Nitrogen (NO x) is a family of poisonous, highly reactive gases. These gases form when fuel is burned at high temperatures. NOx pollution is emitted

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by automobiles, trucks and various non-road vehicles (e.g., construction equipment, boats, etc.) as well as industrial sources such as power plants, industrial boilers, cement kilns, and turbines. NOx often appears as a brownish gas. It is a strong oxidizing agent and plays a major role in the atmospheric reactions with Volatile Organic Compounds (VOCs) which produces ozone on hot summer days Invalid source specified..

6. Sulfur Dioxide (SO2): is a gaseous compound of sulfur and oxygen and is formed when sulfur-containing fuel is burned by mobile so urces, such as locomotives, ships, and off- road diesel equipment. SO 2 is also emitted from several industrial processes, such as petroleum refining and metal processing. Effects from SO 2 exposures at levels near the one-hour standard include bronchoconstriction accompanied by symptoms, which may include wheezing, shortness of breath and ches t tightness, especially during exercise or physical activity. Children, the elderly, and people with asthma, cardiovascular disease or chronic lung disease (such as bronchitis or emphysema) are most susceptible to these symptoms. Continued exposure at elevated levels of SO2 results in increased incidence of pulmonary symptoms and disease, decreased pulmonary function, and increased risk of mortality Invalid source specified..

2.3.2 State Standards and Definitions

The State of California Air Resources Board (ARB) sets the laws and regulations for air quality at State level. The California Ambient Air Quality Standards (CAAQS) are either the same as or more restrictive than the NAAQS in that the State standards also restrict four additional contaminants. Table 2.1 on the following page identifies both the NAAQS and CAAQS. The additional contaminants as regulated by the CAAQS are defined below:

1. Visibility Reducing Particles : Particles in the Air that obstruct the visibility (CARB, 2023).

2. Sulfates: are salts of Sulfuric Acid. Sulfates occu r as microscopic particles (aerosols) resulting from fossil fuel and biomass combustion. They increase the acidity of the atmosphere and form acid rain (CARB, 2023).

3. Hydrogen Sulfide (H 2S): is a colorless, toxic and flammable gas with a recognizable smell of rotten eggs or flatulence. H 2S occurs naturally in crude petroleum, natural gas, volcanic gases, and hot springs. Usually, H2S is formed from bacterial breakdown of organic matter. Exposure to low concentrations of hydrogen sulfide may cause irritation to the eyes, nose, or throat. It may also cause diffic ulty in breathing for some asthmatics. Brief exposures to high concentrations of hydrogen sulfide (greater than 500 ppm) can cause a loss of consciousness and possibly death (CARB, 2023).

4. Vinyl Chloride: also known as chloroethene and is a toxic, carcinogenic, colorless gas with a sweet odor. It is an industrial chemical mainly used to produce its polymer, polyvinyl chloride (PVC) (CARB, 2023).

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Table 2.1: Ambient Air Quality Standards
Ambient Air Quality Standards
Pollutant Average Time California Standards 1 Federal Standards 2 Concentration 3 Method 4 Primary 3,5 Secondary 3,6 Method 7 Ozone (O3)8
1 Hour 0.09 ppm
(180 µg/m3) Ultraviolet Photometry
- Same as Primary
Standard Ultraviolet Photometry
8 Hour 0.070 ppm
(137 µg/m3)

0.070 ppm
(137 µg/m3)
Respirable Particulate
Matter (PM10)9
24 Hour 50 µg/m3 Gravimetric or Beta
Attenuation
150 µg/m3 Same as Primary
Standard
Inertial Separation and
Gravimetric Analysis Annual Arithmetic Mean 20 µg/m3 - Fine Particulate Matter
(PM2.5)9
24 Hour No Separate State Standard 35 µg/m3 Same as Primary Standard Inertial Separation and
Gravimetric Analysis Annual Arithmetic Mean 12 µg/m3 Gravimetric or Beta Attenuation 12.0 µg/m3 15 µg/m3
Carbon Monoxide (CO)
8 hour 9.0 ppm
(10mg/m3)
Non-Dispersive Infrared
Photometry (NDIR)
9 ppm (10 mg/m3)
- Non-Dispersive Infrared
Photometry 1 hour 20 ppm
(23 mg/m3)
35 ppm
(40 mg/m3)
8 Hour (Lake Tahoe) 6 ppm
(7 mg/m3) - - -
Nitrogen Dioxide (NO2)10
Annual Arithmetic Mean 0.030 ppm
(57 µg/m3) Gas Phase
Chemiluminescence

0.053 ppm
(100 µg/m3)8
Same as Primary
Standard Gas Phase
Chemiluminescence 1 Hour 0.18 ppm
(339 µg/m3)

0.100 ppm8
(188/ µg/m3) -
Sulfur Dioxide (SO2)11
Annual Arithmetic Mean -
Ultraviolet Fluorescence

0.030 ppm10
(for Certain Areas) -
Ultraviolet Flourescence;
Spectrophotometry
(Pararoosaniline
Method)9
24 Hour 0.04 ppm
(105 µg/m3)

0.14 ppm10
(for Certain Areas)
(See Footnote 9)
-
3 Hour - - 0.5 ppm
(1300 µg/m3)
1 Hour 0.25 ppm
(655 µg/m3)
75 ppb
(196 µg/m3) -
Lead12,13
30 Day Average 1.5 µg/m3
Atomic Absorption
- -
Calendar Quarter - 1.5 µg/m3 Same as Primary
Standard
High Volume Sampler
and Atomic Absorption Rolling 3-Month Average - 0.15 µg/m3 Visibility Reducing
Particles 8 Hour See footnote 13

Sulfates 24 Hour 25 µg/m3 Ion Chromatography
Hydrogen Sulfide 1 Hour 0.03 ppm
(42 µg/m3) Ultraviolet Fluorescence
Vinyl Chloride12 24 Hour 0.01 ppm
(26 µg/m3) Gas Chromatography

1. California standards for ozone, carbon monoxide (except 8-hour Lake Tahoe), sulfur dioxide (1 and 24 hour), nitrogen dioxide, a nd particulate matter (PM10, PM2.5, and visibility reducing particles), are values that are not to be exceeded. All others are not to be equaled or exceeded. California ambient air quality standards are listed in the Table of Standards in Section 70200 of Title 17 of the California Code of Regulations.

2. National standards (other than ozone, particulate matter, and those based on annual arithmetic mean) are not to be exceeded more than once a year. The ozone standard is attained when the fourth highest 8-hour concentration measured at each si te in a year, averaged over three years, is equal to or less th an the standard. For PM10, the 24-hour standard is attained when the expected number of days per calendar year with a 24-hour average concentration above 150 µg/m3 is equal to or less than one. For PM2.5, the 24-hour standard is attained when 98 percent of the daily concentrations, averaged over three years, are equal to or less than the standard. Contact the U.S. EPA for further clarification and current national policies.

3. Concentration expressed first in units in which it was promulgated. Equivalent units given in parentheses are based upon a reference temperature of 25°C and a reference pressure of 760 torr. Most measurements of air quality are to be corrected to a reference temperature of 25°C and a reference pressure of 760 torr; ppm in this table refers to ppm by volume, or micromoles of pollutant per mole of gas.

4. Any equivalent procedure which can be shown to the satisfaction of the ARB to give equivalent results at or near the level of the air quality standard may be used.

5. National Primary Standards: The levels of air quality necessary, with an adequate margin of safety to protect the public health.

6. National Secondary Standards: The levels of air quality necessary to protect the public welfare from any known or anticipated adverse effects of a pollutant.

7. Reference method as described by the EPA. An “equivalent method” of measurement may be used but must have a “consistent relationship to the reference method” and must be approved by the EPA.

8. On October 1, 2015, the national 8-hour ozone primary and secondary standards were lowered from 0.075 to 0.070 ppm.

9. On December 14, 2012, the national annual PM2.5 primary standard was lowered from 15 μg/m3 to 12.0 μg/m3 . The existing national 24- hour PM2.5 standards (primary and secondary) were retained at 35 μg/m3 , as was the annual secondary standard of 15 μg/m3 . The existing 24-hour PM10 standards (primary and secondary) of 150 μg/m3 also were retained. The form of the annual primary and secondary standards is the annual mean, averaged over 3 years.

10. To attain the 1-hour national standard, the 3-year average of the annual 98th percentile of the 1-hour daily maximum concentrat ions at each site must not exceed 100 ppb. Note that the national 1-hour standard is in units of parts per billion (ppb). California standards are in units of parts per million (ppm). To directly compare the national 1-hour standard to the California standards the units can be converted from ppb to ppm. In this case, the national standard of 100 ppb is identical to 0.100 ppm.

11. On June 2, 2010, a new 1-hour SO2 standard was established and the existing 24-hour and annual primary standards were revoked. To attain the 1-hour national standard, the 3- year average of the annual 99th percentile of the 1-hour daily maximum concentrations at each site must not exceed 75 ppb. The 1971 SO2 national standards (24-hour and annual) remain in effect until one year after an area is designated for the 2010 standard, except that in areas designated nonattainment for the 1971 standards, the 1971 standards remain in effect until implementation plans to attain or maintain the 2010 standards are approved.

12. The ARB has identified lead and vinyl chlori de as 'toxic air contaminants' with no threshold level of exposure for adverse heal th effects determined. These actions allow for the implementation of control measures at levels below the ambient concentrations specified for these pollutants.

13. The national standard for lead was revised on October 15, 2008 to a rolling 3-month average. The 1978 lead standard (1.5 μg/m3 as a quarterly average) remains in effect until one year after an area is designated for the 2008 standard, except that in areas designated nonattainment for the 1978 standard, the 1978 standard remains in effect until implementation plans to attain or maintain the 2008 standard are approved.

14. In 1989, the ARB converted both the general statewide 10-mile visibility standard and the Lake Tahoe 30-mile visibility standard to instrumental equivalents, which are "extinction of

0.23 per kilometer" and "extinction of 0.07 per kilometer" for the statewide and Lake Tahoe Air Basin standards, respectively.

Source: (California Air Resources Board, 05/04/2016)

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2.3.3 Regional Standards

The State of California has 35 sp ecific air districts, which are each responsible for ensuring that the criteria pollutants are below the NAAQS and CAAQS. Air basins that exceed either the NAAQS or the CAAQS for any criteria pollutants are designated as “non-attainment areas” for that pollutant. Currently, there are 15 non-attainment areas for the federal ozone standard and two non-attainment areas for the PM 2.5 standard and many areas are in non-attainment for PM10 as well. California therefore created the California State Implementation Plan (SIP), which is designed to provide control measures needed to attain ambient air quality standards.

The San Diego Air Pollution Control District (SDAPCD) is the government agency which regulates sources of air pollution within the county. Therefore, the SDAPCD developed a Regional Air Quality Strategy (RAQS) to provide control measures to try to achieve attainment status for state ozone standards with control measures focused on VOCs and NOX. Currently, San Diego is in “non-attainment” status for federal and state O3 and state PM10 and PM2.5. An attainment plan is available for O3. The RAQS was adopted in 1992 and has been updated as recently as 2022 which was the latest update incorporating minor changes to the prior 2016 update.

The 2022 update mostly summarizes how the 2016 update has lowered NO X and VOCs emissions which reduces ozone and clarifies and enhances emission reductions by introducing for discussion three new VOC and four new NO X reduction measures. NO X and VOCs are precursors to the formation of ozone in the at mosphere. The criteria pollutant standards are generally attained when each monitor within th e region has had no exceedances during the previous three calendar years. A complete listing of the current attainment status for criteria pollutants with respect to both federal and state nonattainment status by pollutants for County is shown in Table 2.2 on the following page (SDAPCD, 2023).

The RAQS is largely based on population predictions by the San Diego Association of Governments (SANDAG). Projects that produce less growth than predicted by SANDAG would generally conform to the RAQS. Projects that create more growth than projected by SANDAG may create a significant impact if the Project produces unmitigable air quality emissions or if the Project produces cumulative impacts.

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Table 2.2: San Diego County Air Basin Attainment Status by Pollutant Criteria Pollutant Federal Designation State Designation Ozone (8-Hour) Nonattainment Nonattainment
Ozone (1-Hour) Attainment * Nonattainment
Carbon Monoxide Attainment Attainment
PM10 Unclassifiable ** Nonattainment
PM2.5 Attainment Nonattainment***
Nitrogen Dioxide Attainment Attainment
Sulfur Dioxide Attainment Attainment
Lead Attainment Attainment
Sulfates No Federal Standard Attainment
Hydrogen Sulfide No Federal Standard Unclassified
Visibility No Federal Standard Unclassified
* The federal 1-hour standard of 12 pphm was in effect from 1979 through June 15, 2005. The revoked standard is referenced here because it was employed for such a long period and because this benchmark is addressed in State Implementation Plans.
** At the time of designation, if the available data does not support a designation of attainment or nonattainment, the area is designated as unclassifiable.
***The California Air Resources Board (CARB) has not reclassified the region to attainment yet due to (1) incomplete data, and (2) the use of non-California Approved Samplers (CAS). While data collected does meet the requirements for designation of attainment with federal PM2.5 standards, the data completeness requirements for state PM2.5 standards substantially exceed federal requirements and mandates, and have historically not been feasible for most air districts to adhere to given local resources. APCD has begun replacing most regional filter-based PM2.5 monitors as they reach the end of their useful life with continuous PM2.5 air monitors to ensure collected data meets stringent completeness requirements in the future. APCD anticipates these new monitors will be approved as "CAS" monitors once CARB review the list of approved monitors, which has not been updated since 2013.
(SDAPCD, 2023)

2.4 California Environmental Qualit y Act (CEQA) Significance Thresholds

The California Environmental Quality Act has provid ed a checklist to identify the significance of air quality impacts. These guidelines are found in Appendix G of the CEQA guidelines and are as follows:

AIR QUALITY -- Where available, the significance criteria established by the applicable air quality management or air pollution control district may be relied upon to make the following determinations. Would the Project:

A: Conflict with or obstruct implementation of the San Diego Regional Air Quality Strategy (RAQS) or applicable portions of the State Implementation Plan (SIP)? B: Result in a cumulatively considerable ne t increase of any criteria pollutant for which the Project region is non-attainment under an applicable Federal or State ambient air quality standard (PM10, PM2.5 or exceed quantitative thresholds for O3 precursors, oxides of nitrogen [NO X] and Volatile Organic Compounds [VOCs])?

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C: Expose sensitive receptors (including, bu t not limited to, schools, hospitals, resident care facilities, or day-care centers) to substantial pollutant concentrations?
D: Result in other emission (such as those leading to odors) adversely affecting a substantial number of people?

2.5 SDAPCD Rule 20.2 – Air Quality Impact Assessment Screening Thresholds

The SDAPCD has established thresholds in Rule 20.2 for new or modified stationary sources.

These screening criteria can be used to demo nstrate that a project’s total emissions would not result in a significant impact as defined by CEQA. Also, since SDAPCD does not have AQI threshold for Volatile Organic Compounds (VOCs), it is acceptable to use the Coachella Valley VOC threshold from South Coast Air Quality Management District. Should emissions be found to exceed these thresholds, additional modeling is required to demonstrate that the project’s total air quality impacts are below the state and federal ambient air quality standards. These screening thresholds for construction and daily operations are shown in Table 2.3 below.

Table 2.3: Screening Level Thresholds for Criteria Pollutants Pollutant Total Emissions (Pounds per Day)
Construction Emissions
Respirable Particulate Matter (PM10 and PM2.5) 100 and 55 Nitrogen Oxide (NOx) 250
Sulfur Oxide (SOx) 250
Carbon Monoxide (CO) 550
Volatile Organic Compounds (VOCs) 75
Reactive Organic Gases (ROG) SCAQMD 75
Operational Emissions
Respirable Particulate Matter (PM10 and PM2.5) 100 and 55 Nitrogen Oxide (NOx) 250
Sulfur Oxide (SOx) 250
Carbon Monoxide (CO) 550
Lead and Lead Compounds 3.2
Volatile Organic Compounds (VOCs) 75
Reactive Organic Gases (ROG) SCAQMD 75

Non-Criteria pollutants such as Hazardous Air Pollutants (HAPs) or Toxic Air Contaminants (TACs) are also regulated by the SDAPCD. Rule 1200 (Toxic Air Contaminants - New Source Review) adopted on June 12, 1996, requires evaluation of potential health risks for any new,

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relocated, or modified emission unit which may increase emissions of one or more toxic air contaminants. The rule requires that projects that propose to increase cancer risk to between 1 and 10 in one million need to implement toxics best available control technology (T-BACT) or impose the most effective emission limitation, emission control device or control technique to reduce the cancer risk. At no time shall the project increase the cancer risk to over 10 in one million. In addition, a project shall not gene rate either a chronic or acute health hazard index greater than one. Projec ts creating cancer risks less than one in one million are not required to implement T-BACT technology.

The U.S. Environmental Protection Agency (U.S. EPA) uses the term Volatile Organic Compounds (VOC) and the California Air Resour ces Board's (CARB's) Emission Inventory Branch (EIB) uses the term Reactive Organic Gases (ROG) to essentially define the same thing. There are minor deviations between compounds that define each term. However, for purposes of this study we will assume they are essentially the same due to the fact SCAQMD interchanges these words and because CalEEMod directly calculates ROG in place of VOC.

2.6 Local Air Quality

Criteria pollutants are measured continuously throughout the San Diego Air Basin. This data is used to track ambient air quality patterns throughout the County. As mentioned earlier, this data is also used to determine attainment status when compared to the NAAQS and CAAQS. The SDAPCD is responsible for monitoring and reporting monitoring data. The District operates 10 monitoring sites, which collect data on criteria pollutants. Table 2.4 identifies the criteria pollutants monitored at the aforementioned station.

SDAPCD published the five-year air quality summary for all of the monitoring stations within the San Diego basin (SDAPCD, 2022). The proposed development project is closest to the Camp Pendleton and Carmel Mountain Ranch Moni toring stations. Table 2.4 identifies the criteria pollutants monitored at the aforementioned station.

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Table 2.4: Two-Year Ambient Air Quality Summary near the Project Site Pollutant
Closest
Recorded
Ambient
Monitoring
Site
Averaging
Time CAAQS NAAQS 2021 2022 Days Exceeded
over 2 years
O3 (ppm)
Camp
Pendleton or
Carmel
Mountain
Ranch
1 Hour 0.09 ppm No
Standard 0.07 0.08 0
8 Hour 0.070 ppm 0.070 ppm 0.06 0.07 0
PM10
(µg/m3)
24 Hour 50 µg/m3 150
µg/m3 PM10 Data Not Available for Monitoring Sites
near Project Site Annual
Arithmetic
Mean
20 µg/m3 No
Standard
* PM2.5
(µg/m3)
24 Hour No
standard - 35 µg/m3 23.5 14.9 N/A
Annual
Arithmetic
Mean
12 µg/m3 15 µg/m3 8.5 7.6 N/A
NO2 (ppm)
Annual
Arithmetic
Mean

0.030 ppm 0.053 ppm 0.013 0.013 N/A
1 Hour 0.18 ppm 0.100 ppm 0.059 0.059 N/A
* CO
(ppm)
1 Hour 20 ppm 35 ppm 3.0 2.2 N/A 8 Hour 9 ppm 9 ppm 1.8 1.2 N/A Notes:

1. - Yearly maximums marked with “-“ indicated data was not available for either monitoring station.

2. * Data was selected from the Carmel Mountain Ranch station which began in 2019. All other data presented was collected at the Camp Pendleton Monitoring Station.

3. SO
2 is only monitored at the El Cajon Monitoring Station. Within the entire County of San Diego, SO2 emissions within the County are essentially Zero for all metrics including the Average, Maximum 24 hour and 1- hour standards. The Highest 1-hr measurement identified is 0.004 ppm and the most restrictive standard (CAAQS for SO2) is 0.25 ppm.

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3.0 METHODOLOGY

3.1 Construction Emissions Calculations

Air Quality impacts related to construction and daily operations were calculated using CalEEMod Version 2022.1 air quality model, which was developed by South Coast Air Quality Management District (SCAQMD) . The construction module in CalEEMod is used to calculate the emissions associated with the constructi on of the Project and uses methodologies presented in the US EPA AP-42 document wit h emphasis on Chapter 11.9. The CalEEMod input/output model is shown in Attachment A to this report.

The AERSCREEN dispersion model was used to determine the concentration for air pollutants at any location near the pollutant generator. Additionally, the model will predict the maximum exposure distance and concentrations. The AERSCREEN input/output file for the proposed Project is shown in
Attachment B at the end of this report. The worst case exhaust emissions generated from the Project from construction equipment was utilized and calculated within the CalEEMod model.

Once the dispersed concentrations of diesel particulates are estimated in the surrounding air, they are used to evaluate estimated exposure to people. Exposure is evaluated by calculating the dose in milligrams per kilogram body weight per day (mg/kg/d). For residential exposure, the breathing rates are determined for specific age groups, so inhalation dose (Dose-air) is calculated for each of these age groups, 3r d trimester, 0<2, 2<9, 2<16, 16<30 and 16-70 years. The following algorithms calculate this dose for expo sure through the inhalation pathways. The worst case cancer risk dose calculation is defined in Equation 1 below (OEHHA, 2015).

Equation 1 Dose air=Cair*(BR/BW)*A*EF*(1x10-6)

Doseair = Dose throu gh inhalation (mg/kg/d)
Cair =
Concentration in air (μg/m3) Annual average DPM concentration in µg/m3 - AERSCREEN predicts a 1-hr concentration and is corrected to an annual average by multiplying the 1-hr average by 0.08 (US EPA, 1992)
BR/BW = Daily breathing rate normalized to body weight (L/kg BW-day). See Table I.2 for the daily breathing rate for each age range.

A = Inhalation ab sorption factor (assumed to be 1)
EF = Exposure frequency (unitless, days/365 days)
1x10-6 = Milligrams to micrograms conversion (10-3 mg/ μg), cubic meters to liters conversion (10-3 m3/l)

Cancer risk is calculated by multiplying the daily inhalation or oral dose, by a cancer potency factor, the age sensitivity factor, the frequency of time spent at home and the exposure duration divided by averaging time, to yield the excess cancer risk. As described below, the

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excess cancer risk is calculated separately for each age grouping and then summed to yield cancer risk for any given location. Specific factors as modeled are shown within the Project models which is provided as Attachment C to this report. The worst case cancer risk calculation is defined in Equation 2 below (OEHHA, 2015).

Equation 2 RISKinh-res=DOSEair × CPF × ASF × ED/AT × FAH

RISKinh-res = Residential i nhalation cancer risk
DOSEair = Dail y inhalation dose (mg/kg-day)
CPF = Inhalation cancer potency factor (mg/kg-day
-1
)
ASF = Age sensitivity factor for a specified age group (unitless) ED = Exposure duration (in years) for a specified age group AT = Averaging time for lifetime cancer risk (years)
FAH = Fraction of time spent at home (unitless)

Office of Environmental Health Hazard Assessment OEHHA recommends that an exposure duration (residency time) of 30 years be used to estimate individual cancer risk for the Maximally Exposed Individual Resident (MEIR) . OEHHA also recommends that the 30-year exposure duration be used as the basis for public notification and risk reduction audits and plans. Exposure durations of 9-years and 70-years are also recommended to be evaluated for the MEIR to show the range of cancer risk based on residency periods. If a facility is notifying the public regarding cancer risk, the 9-and 70-year cancer risk estimates are useful for people who have resided in their current residence for periods shorter and longer than 30 years.

It should be noted that for construction acti vities, the exposure duration would be over a short term duration or less than 9, 30 or 70 years. Because of this, it is recommended that the risk assessment look at the exposure age group bins most effected be utilized to determine risk over the short-term construction duration. Chronic Non-Cancer risks are also known with respect to diesel particulate matter (DPM) and are determined by the hazard index. To calculate hazard index, DPM concentration is divided by its chronic Reference Exposure Levels (REL). Where the total equals or exceeds one, a health hazard is presumed to exist. RELs are published by the Office of Environmental Health Hazard Assessment (OEHHA, February 2015).

Diesel Exhaust has a REL of 5 μg/m3 and targets the respiratory system.

3.2 Construction Assumptions

The project would start grading sometime in 2025 with residential construction to start shortly thereafter. Grading for the proj ect will consist of approximately 41,989 Cubic yards (CY) of cut material and approximately 50,270 CY of fill and 8,281 CY of import. For purposes of this analysis, it is assumed as much as 10,000 CY of import would be required, which is conservative. Earthwork associated with grading within CalEEMod uses a “Grading Equipment

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Passes” methodology which has been approved by SCAQMD in consultation with building estimator references and is used as the basis of emission generation (CAPCOA, 2022). As a design feature, the pr oject’s construction contractor will utilize Tier IV rated diesel construction equipment to minimize diesel pa rticulates from construction equipment. In addition, the Project also may require some blasting-related activities. Table 3.1 below describes the construction equipment and durations.

Table 3.1: Expected Construction Equipment
Equipment Identification Proposed Start Proposed Complete Quantity Site Preparation 6/1/2025 6/15/2025
Rubber Tired Dozers 3
Tractors/Loaders/Backhoes 4
Grading 6/16/2025 7/25/2025
Excavators 1
Graders 1
Rubber Tired Dozers 3
Tractors/Loaders/Backhoes 3
Crushing/Proc. Equipment 1
Building Construction 7/26/2025 6/12/2026
Cranes 1
Forklifts 3
Generator Sets 1
Tractors/Loaders/Backhoes 3
Welders 1
Paving 6/13/2026 7/10/2026
Pavers 2
Paving Equipment 2
Rollers 2
Architectural Coating 6/13/2026 8/7/2026
Air Compressors 1
This equipment list is based upon equipment inventory within CalEEMod. The quantity and types are based upon assumptions provided by the project applicant.

During blasting operations, grading operatio ns would temporarily stop and resume once blasting is completed. Per conversations with th e project Civil Engineer, it is expected that each blast, limited to once a day, would be limited to six tons Ammonium Nitrate for any given blast operation. The area of each blast would be limited to 20,000 SF or (100-foot x 200-foot) area. Blasting operations usually require a chemical material that is capable of extremely rapid combustion resulting in an explosion or detona tion. These materials are usually mixtures of several ingredients but are often oxygen deficient as combustion reactions take place which

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causes a formation of carbon monoxide and to a lesser extent, nitrogen oxides. For ammonium nitrate and fuel oil (ANFO) mixtures it is expected that carbon monoxide would be generated in quantities of 67 lbs per every ton of explosives and nitrogen oxides would be generated at 17 lbs per the same quantity (EPA, 1995). Particulate matter will also be generated from blasting and can be estimate d using Table 11.9-1 of the aforementioned document (EPA, 1995) using the following equation:

𝑃𝑀ଵ଴(𝑙𝑏/𝐵𝑙𝑎𝑠𝑡) = 0.000014 ∗ (𝐵𝑙𝑎𝑠𝑡𝐴𝑟𝑒𝑎(𝑓𝑡ଶ)) ∗ 0.52

3.3 Operational Emissions

Once construction is completed the proposed project would generate emissions from daily operations which would include sources such as Area, Energy, Mobile, Waste and Water uses, which are also calculated within CalEEMod. Area Sources include consumer products, landscaping and architectural coatings as part of regular maintenance. Energy sources would be from uses such as onsite natural gas and electrical use. The operational model results are also shown in
Attachment A at the end of this report.

The traffic inputs for CalEEMod were adjusted to be consistent with the proposed project traffic study. Based on that study, the proposed project would generate 368 daily trips (LL&G, 2023). The CalEEMod 2022.1 Model was run fo r both the winter and summer scenarios and assumed average winter and summer temperatures.

The model also estimates emission predictions for ROG, NO x, CO, SO2, PM10 and PM2.5 for area
source assumptions. Additionally, it was assume d that an average of 10% of the structural surface area will be re-painted each year. Finally, since the pr oposed project would not be installing hearth options, CalEEMod default hear th settings were modified to represent no hearth options. CalEEMod includes landsc aping and consumer prod uct assumptions which would apply to this project. Consumer product emissions are generated by a wide range of product categories, including air fresheners, automotive products, household cleaners, and personal care products. Emissions associated with these products primarily depend on the increased population associated with residential development.

3.4 Odor Impacts

Potential onsite odor generators would include short-term construction odors from activities such as paving and possibly painting. Given this, short-term construction odors would not be considered an impact. Also, since the project is a residential development, no operational odor sources are expected.

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4.0 FINDINGS

4.1 Construction Findings

The project would start grading sometime in 2025 and all building construction would be completed early 2026. Grading will consist of ap proximately 41,989 cubic yards (CY) of cut material and 50,270 CY of fill material requir ing an import of approximately 8,281 CY of material. Conservatively as indicated in Sectio n 3.2 10,000 CY of import was assumed. In addition some blasting may be required during grading. The following design features were assumed within the CalEEMod analysis:

• Construction Design Feature 1: all heav y diesel construction equipment will be classified as Tier IV.

Table 4.1 shows the expected construction emissions. Based on the cumulative totals, project construction would not exceed any of the SDAPCD screening thresholds and impacts would be less than significant.

During blasting operations, grading operations wo uld stop and it is expected that each blast operation would require between 10,000 - 12,000 lbs of Ammonium Nitrate.

The proposed project would ut ilize approximately 6 tons of ammonium nitrate per a blast which would generate up to 402 lbs (67 lbs/ton * 6 tons) of carbon monoxide and up to 102 lbs (17 lbs/ton * 6 tons) of nitrogen oxides during a blast utilizing 6 tons of ammonium nitrate.

These quantities would be additive to the mass grading operations for the entire project site and could be added to the worst-case mass grading daily CO and NO x output. Additional
particulates derived from each blast is estimate d over a 20,000 SF area roughly 100-foot by 200-foot in dimension as identified in Section 3.2 above. Given this, it is estimated that each blast would generate 20.59 lb/blast as is shown in the equation below:

𝑃𝑀ଵ଴(𝑙𝑏/𝐵𝑙𝑎𝑠𝑡) = 0.000014 ∗ (20,000𝑓𝑡ଶ)ଵ.ହ ∗ 0.52 = 20.59( 𝑙𝑏/𝑏𝑙𝑎𝑠𝑡)

It should be noted, a blasting permit is required from the San Marcos Fire Department which would include required terms and should limit the blasting material to 6 tons per day as this was indicated as the expected blast charge.

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Table 4.1: Expected Construction Emissions Summary
Year ROG NOx CO SO2
PM10
(Dust)
PM10
(Exhaust)
PM10
(Total)
PM2.5
(Dust)
PM2.5
(Exhaust)
PM2.5
(Total)
2025 7.17 6.57 33.2 0.07 0. 15 20.9 21 0.15 10.4 10.5
2026 0.37 2.31 15.7 0.02 0.04 0.31 0.36 0.04 0.07 0.12
Blasting
Emissions
calculations
shown in text
above
102 402 20.59 20.59
Construction
w/ Blasting
(Maximum)

7.17 108.57 435.2 0.07 20.74 20.9 41.59 0.15 10.4 10.5
Screening
Level
Threshold
(lb/day)
75 250 550 250 - - 100 - - 55
SDAPCD
Impact? No No No No - - No - - No

4.2 Health Risk

Based upon the air quality modeling, worst-case onsite PM10 from onsite construction exhaust would cumulatively produce 0.0074 tons over the construction duration (432-calendar days) or an average of 1.80x10 -4 grams/second. Utilizing the AERSCREEN dispersion model, the peak maximum 1-hr concentration is 0.197 µg/m3 during the worst-case construction period.

Converting the peak 1-hr concentration to an annual concentration by multiplying it by 0.08 (US EPA, 1992) yields an annual concentration of 0.016 µg/m 3. Therefore, utilizing the risk equation identified above in Section 3.1, the inhalation cancer risk is 2.8 per million over the construction duration. This risk would be expressed at the point of maximum exposure 125 meters away (410 feet) as predicted by AERSCREEN and shown in the model outputs provided within
Attachment B. As a condition of project approval, the Project would be required to utilize Tier 4 diesel equipment. Since the th reshold is 10 per million exposed with T-BACT installed, the project would have a less than significant impact and would be in compliance with SDAPCD thresholds.

It should be noted that sensit ive residential receptors are adjacent to the project site which is approximately 100 feet south or east. Sinc e the maximum risk is 2.8 per million exposed (and the threshold is 10 per million), all sensitive receptors would have cancer risks at or less than 2.8 per million exposed which would also represent a less than significant impact.

There are known chronic health risks associated with diesel exhaust which are considered non-cancer risks. These risks are calculated based on methods identified in Section 3.1 of this

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report. From this we find that the hourly concentration of 0.197 µg/m3 divided by the REL of 5 µg/m3 yields a Health Hazard Index of 0.04, which is less than one. Therefore, based on thresholds for non-cancer risks in Section 3.1 above, non-cancer health risks are considered less than significant.

4.3 Odor Impact Findings

Potential onsite odor generators would include short-term construction odors from activities such as paving and possibly painting. Given this, short-term construction odors would be considered less than significant. Also, the proposed project would not be expected to generate odors during operation since the project is residential in nature. Odor impacts would be less than significant.

4.4 Operational Findings

The proposed project would generate 368 daily trips (LL&G, 2023) once the proposed project is fully operational in the year 2026. This assumption has been incorporated into the CalEEMod file output shown in
Attachment A to this report.

The expected daily pollutant generation can be calculated utilizing the product of the average daily miles traveled and the expected emissi ons inventory calculated by CALEEMOD 2022.1 and can be seen in Tables 4.2 and 4.3 for the summer and winter scen arios, respectively.

Based upon these calculations, the project’s operational emissions in both the summer and winter scenario will not exceed the SDAPCD sc reening thresholds and impacts are less than significant.

Table 4.2: Daily Pollutant Generation (Summer)
ROG NOx CO SOx PM10 PM2.5
Summer Scenario
Mobile Source Emission
Estimates (Lb/Day) 1.35 0.8 8.37 0.02 1.73 0.45
Area Emission Estimates
(Lb/Day) 1.25 0.02 2.61 < 0.005 < 0.005 < 0.005
Energy Emission Estimates
(Lb/Day) < 0.005 0.08 0.03 < 0.005 0.01 0.01
Total (Lb/Day) 2.61 0.9 11 0.02 1.74 0.46
Screening Level Thresholds 75 250 550 250 100 55
Significant? No No No No No No
Daily pollutant generation assumes trip distances within CalEEMod

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Table 4.3: Daily Pollutant Generation (Winter)
ROG NOx CO SOx PM10 PM2.5
Winter Scenario
Mobile Source Emission
Estimates (Lb/Day) 1.31 0.86 8 0.02 1.72 0.45
Area Emission Estimates
(Lb/Day) 1.13 0.01 1.29 < 0.005 < 0.005 11.9
Energy Emission Estimates
(Lb/Day) < 0.005 0.08 0.03 < 0.005 0.01 0.01
Total (Lb/Day) 2.45 0.96 9.32 0.02 1.73 0.45
Screening Level Thresholds 75 250 550 250 100 55
Significant? No No No No No No
Daily pollutant generation assumes trip distances within CalEEMod

4.5 Cumulative Impacts

Projects that are consistent with the currently adop ted General Plan are determined to be consistent with SDAB’s air quality plans, including the RAQS and the SIP. If a project proposes development that is consistent with or less th an estimates provided in the General Plan, the project would not conflict with or obstruct implementation of the RAQS or SIP.

The project site has a General Plan Designation of SPA (Specific Plan Area) and is associated with the Heart of the City Specific Plan (HOCSP). The HOCSP comprises approximately 1,528 acres in the geographic center of the City. In the HOCSP, certain properties along the Mission Road corridor, including the project site, have a sub-plan designation of Richmar Specific Plan.

Development criteria for the Richmar Specific Plan has not been adopted by the City and there is no current City effort to do so. Therefore, properties requesting development within this sub-plan area are required to establish individual specific plans based on the underlying land use for the property as designated by the HOCSP. As such, there is no fixed land use or density currently assigned to the project site. The Richmar Specific Plan identifies commercial, office and multifamily residential as land use options within the Richmar planning area. Given the topographical constraints of the site and the adjacent residential land uses, a multifamily residential land use with a maximum of 50 multif amily residential units could be built on the site given the topographical constraints and the lack of availability of a secondary/emergency vehicle access point. This would result in a density of 5.9 du/acre. The proposed project has a proposed density of 5.7 du/acre. Therefore, the project’s development intensity and density would be slightly less than what is identified in the current General Plan.

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Also, since the project would not generate signif icant direct or cumulative construction or operational impacts, the Project would be consistent with the County’s RAQS and the State’s air quality SIP.

4.6 Conclusion of Findings

During construction of the prop osed Project, fugitive dust emissions will be expected during grading and equipment usage. However, these emissions would not exceed SDAPCD thresholds and impacts would be less than significant. The project has been designed and planned by incorporating design elements and best management practices which are a condition of approval to the project as shown below:

• Construction Design Feature 1: all heav y diesel construction equipment will be classified as Tier IV.

Additionally, emissions will be generated from both area and operat ional sources by the proposed Project which are the result of Proj ect generated traffic, landscaping maintenance equipment, consumer products, and annual maintenance and painting. Operational air quality impacts would be less than significant. This analysis assumes the project would not install hearth options within the development.

The project site is currently zoned SPA as part of the Heart of the City Specific Plan (HOCSP) with residential uses (2 to 4 dwelling units per acre) contemplated for the site. As part of the requested approvals, the project would modify the HOCSP via a Specific Plan Amendment; remove the current Rich mar Sub-Plan designation for the si te; and establish a new Specific Plan (Woodward 46 Specific Plan) which would allow for the development of 46 residential condominiums on the project site. Due to its location and the adjacent residential land uses, a multifamily residential development, under a Specific Plan, is the most suitable land use for the subject property. City policy requires that a secondary access be provided if more than 50 units are proposed. Given the topographica l constraints of the site and the adjacent residential land uses, a multif amily residential land use with a maximum of 50 multifamily residential units could be built on the site given the topographical constraints and the lack of availability of a secondary/emergency vehicle acce ss point. This would result in a density of

5.9 du/acre. The proposed project has a proposed density of 5.7 du/acre. Therefore, the project’s development intensity and density would be slightly less than what is identified in the current General Plan. Since no direct impacts are expected, the Project would not generate cumulative operational impacts.

Cumulative construction impact could be expected if construction of the proposed Project and potentially a hypothetical project in the imme diate vicinity. An impact would exist if the cumulative totals of both projects when adde d together exceed the screening significance

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thresholds. Based on discussions with the app licant, no large construction projects are expected to occur simultaneously and within the immediate vicinity to the Proposed Project.

Because of this, a less than significant cumulative construction impact would be expected.

Also, since the project would not generate signif icant direct or cumulative construction or operational impacts, the Project would be consistent with the County’s RAQS and the State’s air quality SIP.

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5.0 REFERENCES

California Air Resources Board. (05/04/2016). www.arb.ca.gov. Retrieved from Ambient Air Quality Standards: http://www.arb.ca.gov/research/aaqs/aaqs2.pdf CAPCOA. (2022). CalEEMod Verision 2022.1 Calcuation Details (Appendix C). Retrieved from https://www.caleemod.com/documents/user-guide/04_Appendix%20C.pdf CARB. (2023). https://ww2.arb.ca.gov. Retrieved from Sulfate and Health:
https://ww2.arb.ca.gov/resources/sulfate-and-health
CARB. (2023). https://ww2.arb.ca.gov. Retrieved from https://ww2.arb.ca.gov/resources/vinyl- chloride-and-health
CARB. (2023). https://ww2.arb.ca.gov. Retrieved from Hydrogen Sulfide & Health:
https://ww2.arb.ca.gov/resources/hydrogen-sulfide-and-health CARB. (2023). https://ww2.arb.ca.gov. Retrieved from Visibility reducing particles and health:
https://ww2.arb.ca.gov/resources/visibility-reducing-particles-and-health CR Associates. (2023). Capalina Development Transportation Analysis.

EPA. (2022, AUG 9). https://www.epa.gov. Retrieved 2023, from Criteria Air Pollutants:
https://www.epa.gov/criteria-air-pollutants
EPA. (2022). https://www.epa.gov/. Retrieved from What is carbon monoxide?:
https://www.epa.gov/indoor-air-quality-iaq/what-carbon- monoxide#:~:text=Carbon%20monoxide%20(CO)%20is%20a,soluble%20in%20alcohol %20and%20benzene.

EPA. (2022). https://www.epa.gov/. Retrieved from Learn about Lead:
https://www.epa.gov/lead/learn-about-lead#lead
EPA. (2022). https://www.epa.gov/. Retrieved from What is NO2 and how does it get in the air? EPA. (2022). https://www.epa.gov/. Retrieved from What is PM, and how does it get into the air?: https://www.epa.gov/pm-pollution/particulate-matter-pm-basics#PM EPA, U. (1995). EPA-AP 42, Fifth Edition Compilation of Air Pollutant Emission Factors. US EPA.

Retrieved from www.epa.gov/ttn/chief/ap42/ch13/final/c13s03.pdf Google. (2023). Retrieved 2023, from maps.google.com
Google Earth Pro. (2023).

LL&G. (2023). Woodward 46 Apartment Project – Driveway Assessment.

OEHHA. (2015). Risk Assessment Guidelines - Guidance Manual for Preparation of Health Risk Assessments. OEHHHA. Retrieved from
http://oehha.ca.gov/air/hot_spots/2015/2015GuidanceManual.pdf OEHHA. (February 2015). Air Toxics Hot Spots Program - Risk Assessment Guidelines - Guidance Manual for Preparation of Health Risk Assessments. OEHHA.

SDAPCD. (2022). 5 year air quality summary report. Retrieved April 14, 2016, from https://www.sdapcd.org/content/dam/sdapcd/documents/monitoring/5-Year-Air- Quality.pdf
SDAPCD. (2023). Retrieved 2018, from
https://www.sdapcd.org/content/sdapcd/planning/attainment-status.html Summa Architecture. (2023). Site Development Plan.

US EPA. (1992). Screening Procedures for Estimating the Air Quality Impact of Stationary Sources Revised . US EPA. Retrieved from
http://www.epa.gov/scram001/guidance/guide/EPA-454R-92-019_OCR.pdf WRCC. (2018). Retrieved from
https://wrcc.dri.edu/Climate/comp_table_show.php?stype=wind_dir_avg

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WRCC. (2021). ESCONDIDO, CALIFORNIA (042862). Retrieved from https://wrcc.dri.edu/summary/Climsmsca.html: https://wrcc.dri.edu/cgi- bin/cliMAIN.pl?ca2862

ATTACHMENT A

CalEEMod

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Woodward 46 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 Y ear, Unmitigated

2.4. Operations Emissions Compared Against Thresholds

2.5. Operations Emissions by Sector, Unmitigated

3. Construction Emissions Details

3.1. Site Preparation (2025) - Unmitigated

3.3. Grading (2025) - Unmitigated

3.5. Building Construction (2025) - Unmitigated

3.7. Building Construction (2026) - Unmitigated
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3.9. Paving (2026) - Unmitigated

3.11. Architectural Coating (2026) - Unmitigated

4. Operations Emissions Details

4.1. Mobile Emissions by Land Use

4.1.1. Unmitigated

4.2. Energy

4.2.1. Electricity Emissions By Land Use - Unmitigated

4.2.3. Natural Gas Emissions By Land Use - Unmitigated

4.3. Area Emissions by Source

4.3.1. Unmitigated

4.4. Water Emissions by Land Use

4.4.1. Unmitigated

4.5. Waste Emissions by Land Use

4.5.1. Unmitigated

4.6. Refrigerant Emissions by Land Use

4.6.1. Unmitigated

5. Activity Data
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5.1. Construction Schedule

5.2. Off-Road Equipment

5.2.1. Unmitigated

5.3. Construction Vehicles

5.3.1. Unmitigated

5.5. Architectural Coatings

5.7. Construction Paving

5.8. Construction Electricity Consumption and Emissions Factors

5.9. Operational Mobile Sources

5.9.1. Unmitigated

5.10. Operational Area Sources

5.10.1. Hearths

5.10.1.1. Unmitigated

5.10.2. Architectural Coatings

5.10.3. Landscape Equipment

5.11. Operational Energy Consumption

5.11.1. Unmitigated
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5.12. Operational Water and Wastewater Consumption

5.12.1. Unmitigated

5.13. Operational Waste Generation

5.13.1. Unmitigated

5.14. Operational Refrigeration and Air Conditioning Equipment

5.14.1. Unmitigated

8. User Changes to Default Data
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1. Basic Project Information

1.1. Basic Project Information
Data Field Value
Project Name Woodward 46
Construction Start Date 1/1/2025
Operational Y ear 2027
Lead Agency —
Land Use Scale Project/site
Analysis Level for Defaults County
Windspeed (m/s) 2.20
Precipitation (days) 12.8
Location 33.14424278725711, -117.15948514975167
County San Diego
City San Marcos
Air District San Diego County APCD
Air Basin San Diego
TAZ 6278
EDFZ 12
Electric Utility San Diego Gas & Electric
Gas Utility San Diego Gas & Electric
App Version 2022.1.1.21

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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Apartments Mid Rise 46.0 Dwelling Unit 8.57 44,160 46,000 — 128 —

1.3. User-Selected Emission Reduction Measures by Emissions Sector No measures selected

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. ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Daily, Summer
(Max)
— — — — — — — — — —
Unmit. 7.17 6.57 33.2 0.07 0.15 20.9 21.0 0.15 10.4 10.5 Daily, Winter
(Max)
— — — — — — — — — —
Unmit. 0.37 2.31 15.7 0.02 0.04 0.31 0.36 0.04 0.07 0.12 Average Daily
(Max)
— — — — — — — — — —
Unmit. 0.89 1.41 8.46 0.01 0.03 2.38 2.41 0.03 1.16 1.19 Annual (Max) — — — — — — — — — —
Unmit. 0.16 0.26 1.54 < 0.005 0.01 0.43 0.44 0.01 0.21 0.22

2.2. Construction Emissions by Y ear, Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Y ear ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Daily - Summer
(Max)
— — — — — — — — — —
2025 0.68 6.57 33.2 0.07 0.15 20.9 21.0 0.15 10.4 10.5
2026 7.17 2.64 15.8 0.02 0.04 0.31 0.36 0.04 0.07 0.12
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Daily - Winter
(Max)
— — — — — — — — — —
2025 0.37 2.31 15.7 0.02 0.04 0.31 0.36 0.04 0.07 0.12
2026 0.35 2.30 15.6 0.02 0.04 0.31 0.36 0.04 0.07 0.12
Average Daily — — — — — — — — — —
2025 0.19 1.41 8.46 0.01 0.03 2.38 2.41 0.03 1.16 1.19
2026 0.89 0.91 5.74 0.01 0.02 0.11 0.13 0.02 0.03 0.04
Annual — — — — — — — — — —
2025 0.03 0.26 1.54 < 0.005 0.01 0.43 0.44 0.01 0.21 0.22 2026 0.16 0.17 1.05 < 0.005 < 0.005 0.02 0.02 < 0.005 < 0.005 0.01

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. ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Daily, Summer
(Max)
— — — — — — — — — —
Unmit. 2.61 0.90 11.0 0.02 0.02 1.72 1.74 0.02 0.44 0.46 Daily, Winter
(Max)
— — — — — — — — — —
Unmit. 2.35 0.96 8.08 0.02 0.02 1.72 1.74 0.02 0.44 0.46 Average Daily
(Max)
— — — — — — — — — —
Unmit. 2.45 0.96 9.32 0.02 0.02 1.70 1.73 0.02 0.43 0.45 Annual (Max) — — — — — — — — — —
Unmit. 0.45 0.17 1.70 < 0.005 < 0.005 0.31 0.31 < 0.005 0.08 0.08

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) Woodward 46 Custom Report, 1/28/2024
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Sector ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Daily, Summer
(Max)
— — — — — — — — — —
Mobile 1.35 0.80 8.37 0.02 0.01 1.72 1.73 0.01 0.44 0.45 Area 1.25 0.02 2.61 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 Energy < 0.005 0.08 0.03 < 0.005 0.01 — 0.01 0.01 — 0.01 Water — — — — — — — — — —
Waste — — — — — — — — — —
Refrig. — — — — — — — — — —
Total 2.61 0.90 11.0 0.02 0.02 1.72 1.74 0.02 0.44 0.46 Daily, Winter
(Max)
— — — — — — — — — —
Mobile 1.32 0.88 8.05 0.02 0.01 1.72 1.73 0.01 0.44 0.45 Area 1.02 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00
Energy < 0.005 0.08 0.03 < 0.005 0.01 — 0.01 0.01 — 0.01 Water — — — — — — — — — —
Waste — — — — — — — — — —
Refrig. — — — — — — — — — —
Total 2.35 0.96 8.08 0.02 0.02 1.72 1.74 0.02 0.44 0.46 Average Daily — — — — — — — — — —
Mobile 1.31 0.86 8.00 0.02 0.01 1.70 1.72 0.01 0.43 0.45 Area 1.13 0.01 1.29 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 Energy < 0.005 0.08 0.03 < 0.005 0.01 — 0.01 0.01 — 0.01 Water — — — — — — — — — —
Waste — — — — — — — — — —
Refrig. — — — — — — — — — —
Total 2.45 0.96 9.32 0.02 0.02 1.70 1.73 0.02 0.43 0.45 Annual — — — — — — — — — —
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Mobile 0.24 0.16 1.46 < 0.005 < 0.005 0.31 0.31 < 0.005 0.08 0.08 Area 0.21 < 0.005 0.24 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 Energy < 0.005 0.02 0.01 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 Water — — — — — — — — — —
Waste — — — — — — — — — —
Refrig. — — — — — — — — — —
Total 0.45 0.17 1.70 < 0.005 < 0.005 0.31 0.31 < 0.005 0.08 0.08

3. Construction Emissions Details

3.1. Site Preparation (2025) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Onsite — — — — — — — — — —
Daily, Summer
(Max)
— — — — — — — — — —
Off-Road
Equipment

0.50 2.59 28.3 0.05 0.10 — 0.10 0.10 — 0.10
Dust From
Mater
ial
Movement
— — — — — 19.7 19.7 — 10.1 10.1
Onsite truck 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

0.01 0.07 0.78 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 Dust From
Mater
ial
Movement
— — — — — 0.54 0.54 — 0.28 0.28
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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 Annual — — — — — — — — — —
Off-Road
Equipment
< 0.005 0.01 0.14 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 Dust From
Mater
ial
Movement
— — — — — 0.10 0.10 — 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 Offsite — — — — — — — — — —
Daily, Summer
(Max)
— — — — — — — — — —
Worker 0.07 0.05 0.81 0.00 0.00 0.15 0.15 0.00 0.03 0.03 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.07 3.93 1.47 0.02 0.06 0.77 0.83 0.06 0.21 0.27 Daily, Winter
(Max)
— — — — — — — — — —
Average Daily — — — — — — — — — —
Worker < 0.005 < 0.005 0.02 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Hauling < 0.005 0.11 0.04 < 0.005 < 0.005 0.02 0.02 < 0.005 0.01 0.01 Annual — — — — — — — — — —
Worker < 0.005 < 0.005 < 0.005 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Hauling < 0.005 0.02 0.01 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005

3.3. Grading (2025) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Onsite — — — — — — — — — —
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Daily, Summer
(Max)
— — — — — — — — — —
Off-Road
Equipment

0.55 3.39 31.2 0.05 0.11 — 0.11 0.11 — 0.11
Dust From
Mater
ial
Movement
— — — — — 20.2 20.2 — 10.2 10.2
Onsite truck 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

0.04 0.28 2.57 < 0.005 0.01 — 0.01 0.01 — 0.01
Dust From
Mater
ial
Movement
— — — — — 1.66 1.66 — 0.84 0.84
Onsite truck 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 0.05 0.47 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 Dust From
Mater
ial
Movement
— — — — — 0.30 0.30 — 0.15 0.15
Onsite truck 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 0.09 0.07 1.04 0.00 0.00 0.19 0.19 0.00 0.04 0.04 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Hauling 0.04 2.62 0.98 0.01 0.04 0.52 0.55 0.04 0.14 0.18 Daily, Winter
(Max)
— — — — — — — — — —
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Average Daily — — — — — — — — — —
Worker 0.01 0.01 0.08 0.00 0.00 0.02 0.02 0.00 < 0.005 < 0.005 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Hauling < 0.005 0.22 0.08 < 0.005 < 0.005 0.04 0.05 < 0.005 0.01 0.01 Annual — — — — — — — — — —
Worker < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 Vendor 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Hauling < 0.005 0.04 0.01 < 0.005 < 0.005 0.01 0.01 < 0.005 < 0.005 < 0.005

3.5. Building Construction (2025) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Onsite — — — — — — — — — —
Daily, Summer
(Max)
— — — — — — — — — —
Off-Road
Equipment

0.23 2.03 14.3 0.02 0.04 — 0.04 0.04 — 0.04
Onsite truck 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

0.23 2.03 14.3 0.02 0.04 — 0.04 0.04 — 0.04
Onsite truck 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

0.07 0.63 4.45 0.01 0.01 — 0.01 0.01 — 0.01
Onsite truck 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — —
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< 0.005—< 0.005< 0.005—< 0.005< 0.0050.810.120.01Off-Road Equipment
Onsite truck 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 0.13 0.10 1.53 0.00 0.00 0.28 0.28 0.00 0.07 0.07 Vendor < 0.005 0.16 0.08 < 0.005 < 0.005 0.03 0.03 < 0.005 0.01 0.01 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter
(Max)
— — — — — — — — — —
Worker 0.13 0.11 1.34 0.00 0.00 0.28 0.28 0.00 0.07 0.07 Vendor < 0.005 0.17 0.08 < 0.005 < 0.005 0.03 0.03 < 0.005 0.01 0.01 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Average Daily — — — — — — — — — —
Worker 0.04 0.03 0.42 0.00 0.00 0.09 0.09 0.00 0.02 0.02 Vendor < 0.005 0.05 0.02 < 0.005 < 0.005 0.01 0.01 < 0.005 < 0.005 < 0.005 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Annual — — — — — — — — — —
Worker 0.01 0.01 0.08 0.00 0.00 0.02 0.02 0.00 < 0.005 < 0.005 Vendor < 0.005 0.01 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

3.7. Building Construction (2026) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Onsite — — — — — — — — — —
Daily, Summer
(Max)
— — — — — — — — — —
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Off-Road
Equipment

0.23 2.03 14.3 0.02 0.04 — 0.04 0.04 — 0.04
Onsite truck 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

0.23 2.03 14.3 0.02 0.04 — 0.04 0.04 — 0.04
Onsite truck 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

0.07 0.65 4.56 0.01 0.01 — 0.01 0.01 — 0.01
Onsite truck 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 0.12 0.83 < 0.005 < 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 Offsite — — — — — — — — — —
Daily, Summer
(Max)
— — — — — — — — — —
Worker 0.12 0.09 1.43 0.00 0.00 0.28 0.28 0.00 0.07 0.07 Vendor < 0.005 0.16 0.07 < 0.005 < 0.005 0.03 0.03 < 0.005 0.01 0.01 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Daily, Winter
(Max)
— — — — — — — — — —
Worker 0.12 0.10 1.26 0.00 0.00 0.28 0.28 0.00 0.07 0.07 Vendor < 0.005 0.16 0.07 < 0.005 < 0.005 0.03 0.03 < 0.005 0.01 0.01 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Average Daily — — — — — — — — — —
Worker 0.04 0.03 0.41 0.00 0.00 0.09 0.09 0.00 0.02 0.02 Vendor < 0.005 0.05 0.02 < 0.005 < 0.005 0.01 0.01 < 0.005 < 0.005 < 0.005 Woodward 46 Custom Report, 1/28/2024
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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 Annual — — — — — — — — — —
Worker 0.01 0.01 0.07 0.00 0.00 0.02 0.02 0.00 < 0.005 < 0.005 Vendor < 0.005 0.01 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 < 0.005 Hauling 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

3.9. Paving (2026) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Onsite — — — — — — — — — —
Daily, Summer
(Max)
— — — — — — — — — —
Off-Road
Equipment

0.16 1.93 10.6 0.01 0.03 — 0.03 0.03 — 0.03
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 Daily, Winter
(Max)
— — — — — — — — — —
Average Daily — — — — — — — — — —
Off-Road
Equipment

0.01 0.11 0.58 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 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 Annual — — — — — — — — — —
Off-Road
Equipment
< 0.005 0.02 0.11 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 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 Offsite — — — — — — — — — —
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Daily, Summer
(Max)
— — — — — — — — — —
Worker 0.05 0.04 0.65 0.00 0.00 0.13 0.13 0.00 0.03 0.03 Vendor 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 Daily, Winter
(Max)
— — — — — — — — — —
Average Daily — — — — — — — — — —
Worker < 0.005 < 0.005 0.03 0.00 0.00 0.01 0.01 0.00 < 0.005 < 0.005 Vendor 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 Annual — — — — — — — — — —
Worker < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 Vendor 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

3.11. Architectural Coating (2026) - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Onsite — — — — — — — — — —
Daily, Summer
(Max)
— — — — — — — — — —
Off-Road
Equipment

0.02 0.65 0.96 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 Architectural
Coatings

6.91 — — — — — — — — —
Onsite truck 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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Average Daily — — — — — — — — — —
Off-Road
Equipment
< 0.005 0.07 0.11 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 Architectural
Coatings

0.76 — — — — — — — — —
Onsite truck 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 0.01 0.02 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 Architectural
Coatings

0.14 — — — — — — — — —
Onsite truck 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 0.29 0.00 0.00 0.06 0.06 0.00 0.01 0.01 Vendor 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 Daily, Winter
(Max)
— — — — — — — — — —
Average Daily — — — — — — — — — —
Worker < 0.005 < 0.005 0.03 0.00 0.00 0.01 0.01 0.00 < 0.005 < 0.005 Vendor 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 Annual — — — — — — — — — —
Worker < 0.005 < 0.005 0.01 0.00 0.00 < 0.005 < 0.005 0.00 < 0.005 < 0.005 Vendor 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 Woodward 46 Custom Report, 1/28/2024
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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 ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Daily, Summer
(Max)
— — — — — — — — — —
Apartments Mid
Rise

1.35 0.80 8.37 0.02 0.01 1.72 1.73 0.01 0.44 0.45
Total 1.35 0.80 8.37 0.02 0.01 1.72 1.73 0.01 0.44 0.45 Daily, Winter
(Max)
— — — — — — — — — —
Apartments Mid
Rise

1.32 0.88 8.05 0.02 0.01 1.72 1.73 0.01 0.44 0.45
Total 1.32 0.88 8.05 0.02 0.01 1.72 1.73 0.01 0.44 0.45 Annual — — — — — — — — — —
Apartments Mid
Rise

0.24 0.16 1.46 < 0.005 < 0.005 0.31 0.31 < 0.005 0.08 0.08 Total 0.24 0.16 1.46 < 0.005 < 0.005 0.31 0.31 < 0.005 0.08 0.08

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 ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Daily, Summer
(Max)
— — — — — — — — — —
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Apartments Mid
Rise
— — — — — — — — — —
Total — — — — — — — — — —
Daily, Winter
(Max)
— — — — — — — — — —
Apartments Mid
Rise
— — — — — — — — — —
Total — — — — — — — — — —
Annual — — — — — — — — — —
Apartments Mid
Rise
— — — — — — — — — —
Total — — — — — — — — — —

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 ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Daily, Summer
(Max)
— — — — — — — — — —
Apartments Mid
Rise
< 0.005 0.08 0.03 < 0.005 0.01 — 0.01 0.01 — 0.01
Total < 0.005 0.08 0.03 < 0.005 0.01 — 0.01 0.01 — 0.01 Daily, Winter
(Max)
— — — — — — — — — —
Apartments Mid
Rise
< 0.005 0.08 0.03 < 0.005 0.01 — 0.01 0.01 — 0.01
Total < 0.005 0.08 0.03 < 0.005 0.01 — 0.01 0.01 — 0.01 Annual — — — — — — — — — —
Apartments Mid
Rise
< 0.005 0.02 0.01 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 Total < 0.005 0.02 0.01 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 Woodward 46 Custom Report, 1/28/2024
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4.3. Area Emissions by Source

4.3.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Source ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Daily, Summer
(Max)
— — — — — — — — — —
Hearths 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00
Consumer
Products

0.95 — — — — — — — — —
Architectural
Coatings

0.08 — — — — — — — — —
Landscape
Equipment

0.23 0.02 2.61 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 Total 1.25 0.02 2.61 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 Daily, Winter
(Max)
— — — — — — — — — —
Hearths 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00
Consumer
Products

0.95 — — — — — — — — —
Architectural
Coatings

0.08 — — — — — — — — —
Total 1.02 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00
Annual — — — — — — — — — —
Hearths 0.00 0.00 0.00 0.00 0.00 — 0.00 0.00 — 0.00
Consumer
Products

0.17 — — — — — — — — —
Architectural
Coatings

0.01 — — — — — — — — —
Landscape
Equipment

0.02 < 0.005 0.24 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005 Woodward 46 Custom Report, 1/28/2024
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Total 0.21 < 0.005 0.24 < 0.005 < 0.005 — < 0.005 < 0.005 — < 0.005

4.4. Water Emissions by Land Use

4.4.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land Use ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Daily, Summer
(Max)
— — — — — — — — — —
Apartments Mid
Rise
— — — — — — — — — —
Total — — — — — — — — — —
Daily, Winter
(Max)
— — — — — — — — — —
Apartments Mid
Rise
— — — — — — — — — —
Total — — — — — — — — — —
Annual — — — — — — — — — —
Apartments Mid
Rise
— — — — — — — — — —
Total — — — — — — — — — —

4.5. Waste Emissions by Land Use

4.5.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land Use ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Daily, Summer
(Max)
— — — — — — — — — —
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——————————Apartments Mid
Rise
Total — — — — — — — — — —
Daily, Winter
(Max)
— — — — — — — — — —
Apartments Mid
Rise
— — — — — — — — — —
Total — — — — — — — — — —
Annual — — — — — — — — — —
Apartments Mid
Rise
— — — — — — — — — —
Total — — — — — — — — — —

4.6. Refrigerant Emissions by Land Use

4.6.1. Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land Use ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T Daily, Summer
(Max)
— — — — — — — — — —
Apartments Mid
Rise
— — — — — — — — — —
Total — — — — — — — — — —
Daily, Winter
(Max)
— — — — — — — — — —
Apartments Mid
Rise
— — — — — — — — — —
Total — — — — — — — — — —
Annual — — — — — — — — — —
Apartments Mid
Rise
— — — — — — — — — —
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Total — — — — — — — — — —

5. Activity Data

5.1. Construction Schedule
Phase Name Phase Type Start Date End Date Days Per Week Work Days per Phase Phase Description Site Preparation Site Preparation 6/1/2025 6/15/2025 5.00 10.0 — Grading Grading 6/16/2025 7/25/2025 5.00 30.0 —
Building Construction Building Construction 7/26/2025 6/12/2026 5.00 230 — Paving Paving 6/13/2026 7/10/2026 5.00 20.0 —
Architectural Coating Architectural Coating 6/13/2026 8/7/2026 5.00 40.0 —

5.2. Off-Road Equipment

5.2.1. Unmitigated
Phase Name Equipment Type Fuel Type Engine Tier Number per Day Hours Per Day Horsepower Load Factor Site Preparation Rubber Tired Dozers Diesel Tier 4 Final 3.00 8.00 367 0.40 Site Preparation Tractors/Loaders/Backh
oes
Diesel Tier 4 Final 4.00 8.00 84.0 0.37
Grading Excavators Diesel Tier 4 Final 1.00 8.00 36.0 0.38 Grading Graders Diesel Tier 4 Final 1.00 8.00 148 0.41
Grading Rubber Tired Dozers Diesel Tier 4 Final 3.00 8.00 367 0.40 Grading Tractors/Loaders/Backh
oes
Diesel Tier 4 Final 3.00 8.00 84.0 0.37
Grading Crushing/Proc.

Equipment
Diesel Tier 4 Final 1.00 6.00 310 0.30
Building Construction Cranes Diesel Tier 4 Final 1.00 7.00 367 0.29 Building Construction Forklifts Diesel Tier 4 Final 3.00 8.00 82.0 0.20 Woodward 46 Custom Report, 1/28/2024
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Building Construction Generator Sets Diesel Tier 4 Final 1.00 8.00 14.0 0.74 Building Construction Tractors/Loaders/Backh
oes
Diesel Tier 4 Final 3.00 7.00 84.0 0.37
Building Construction Welders Diesel Tier 4 Final 1.00 8.00 46.0 0.45 Paving Pavers Diesel Tier 4 Final 2.00 8.00 81.0 0.42
Paving Paving Equipment Diesel Tier 4 Final 2.00 8.00 89.0 0.36 Paving Rollers Diesel Tier 4 Final 2.00 8.00 36.0 0.38
Architectural Coating Air Compressors Diesel Tier 4 Final 1.00 6.00 37.0 0.48

5.3. Construction Vehicles

5.3.1. Unmitigated
Phase Name Trip Type One-Way Trips per Day Miles per Trip Vehicle Mix Site Preparation — — — —
Site Preparation Worker 17.5 12.0 LDA,LDT1,LDT2
Site Preparation Vendor — 7.63 HHDT,MHDT
Site Preparation Hauling 41.7 20.0 HHDT
Site Preparation Onsite truck — — HHDT
Grading — — — —
Grading Worker 22.5 12.0 LDA,LDT1,LDT2
Grading Vendor — 7.63 HHDT,MHDT
Grading Hauling 27.8 20.0 HHDT
Grading Onsite truck — — HHDT
Building Construction — — — —
Building Construction Worker 33.1 12.0 LDA,LDT1,LDT2
Building Construction Vendor 4.92 7.63 HHDT,MHDT
Building Construction Hauling 0.00 20.0 HHDT
Building Construction Onsite truck — — HHDT
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Paving — — — —
Paving Worker 15.0 12.0 LDA,LDT1,LDT2
Paving Vendor — 7.63 HHDT,MHDT
Paving Hauling 0.00 20.0 HHDT
Paving Onsite truck — — HHDT
Architectural Coating — — — —
Architectural Coating Worker 6.62 12.0 LDA,LDT1,LDT2
Architectural Coating Vendor — 7.63 HHDT,MHDT
Architectural Coating Hauling 0.00 20.0 HHDT
Architectural Coating Onsite truck — — HHDT

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 89,424 29,808 0.00 0.00 —

5.7. Construction Paving
Land Use Area Paved (acres) % Asphalt
Apartments Mid Rise — 0%

5.8. Construction Electricity Consumption and Emissions Factors kWh per Y ear and Emission Factor (lb/MWh)
Y ear kWh per Y ear CO2 CH4 N2O
2025 0.00 540 0.03 < 0.005
2026 0.00 45.1 0.03 < 0.005
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5.9. Operational Mobile Sources

5.9.1. Unmitigated
Land Use Type Trips/Weekday Trips/Saturday Trips/Sunday Trips/Y ear VMT/Weekday VMT/Saturday VMT/Sunday VMT/Y ear Apartments Mid Rise 368 368 368 134,320 2,432 2,432 2,432 887,661

5.10. Operational Area Sources

5.10.1. Hearths

5.10.1.1. Unmitigated
Hearth Type Unmitigated (number)
Apartments Mid Rise —
Wood Fireplaces 0
Gas Fireplaces 0
Propane Fireplaces 0
Electric Fireplaces 0
No Fireplaces 46
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)
89424 29,808 0.00 0.00 —
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5.10.3. Landscape Equipment
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) Apartments Mid Rise 155,980 45.1 0.0330 0.0040 325,608

5.12. Operational Water and Wastewater Consumption

5.12.1. Unmitigated
Land Use Indoor Water (gal/year) Outdoor Water (gal/year) Apartments Mid Rise 1,616,121 840,194

5.13. Operational Waste Generation

5.13.1. Unmitigated
Land Use Waste (ton/year) Cogeneration (kWh/year)
Apartments Mid Rise 33.9 —

5.14. Operational Refrigeration and Air Conditioning Equipment Woodward 46 Custom Report, 1/28/2024
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5.14.1. Unmitigated
Land Use Type Equipment Type Refrigerant GWP Quantity (kg) Operations Leak Rate Service Leak Rate Times Serviced Apartments Mid Rise Average room A/C &
Other
residential A/C
and heat pumps
R-410A 2,088 < 0.005 2.50 2.50 10.0
Apartments Mid Rise Household refrigerators
and/or
freezers
R-134a 1,430 0.12 0.60 0.00 1.00

8. User Changes to Default Data
Screen Justification
Land Use Site is 8.57 acres
Construction: Construction Phases Estimated Construction Schedule Operations: Vehicle Data Per TS
Construction: Dust From Material Movement Material Import Construction: Off-Road Equipment Construction Equipment Construction: Off-Road Equipment EF Tier 4
Operations: Hearths —

ATTACHMENT B

AERSCREEN for PM10 Exhaust

AERSCREEN 21112 / AERMOD 22112                                      01/28/24 12:56:11
TITLE: WOODWARD 46
‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ******************************  AREA PARAMETERS  **************************** ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ SOURCE EMISSION RATE:         0.180E‐03 g/s             0.143E‐02 lb/hr AREA EMISSION RATE:           0.518E‐08 g/(s‐m2)        0.411E‐07 lb/(hr‐m2) AREA HEIGHT:                       3.00 meters               9.84 feet AREA SOURCE LONG SIDE:           186.23 meters             610.99 feet AREA SOURCE SHORT SIDE:          186.23 meters             610.99 feet INITIAL VERTICAL DIMENSION:        1.00 meters               3.28 feet RURAL OR URBAN:                   URBAN
POPULATION:                       79000
FLAGPOLE RECEPTOR HEIGHT:          1.50 meters               4.92 feet INITIAL PROBE DISTANCE =          5000. meters             16404. feet ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ***********************  BUILDING DOWNWASH PARAMETERS  ********************** ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ BUILDING DOWNWASH NOT USED FOR NON‐POINT SOURCES
‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ **************************  FLOW SECTOR ANALYSIS  *************************** 25 meter receptor spacing: 1. meters ‐ 5000. meters
‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ MAXIMUM  IMPACT  RECEPTOR
Zo        SURFACE   1‐HR CONC  RADIAL  DIST   TEMPORAL
SECTOR    ROUGHNESS  (ug/m3)    (deg)   (m)    PERIOD
‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐
1*       1.000    0.1969      45   125.0     WIN
* = worst case diagonal
‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ **********************  MAKEMET METEOROLOGY PARAMETERS
*********************
‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ MIN/MAX TEMPERATURE:    250.0 / 310.0 (K)
MINIMUM WIND SPEED:       0.5 m/s
ANEMOMETER HEIGHT:     10.000 meters
SURFACE CHARACTERISTICS INPUT: AERMET SEASONAL TABLES
DOMINANT SURFACE PROFILE: Urban
DOMINANT CLIMATE TYPE:    Average Moisture
DOMINANT SEASON:          Winter
ALBEDO:                  0.35
BOWEN RATIO:             1.50
ROUGHNESS LENGTH:       1.000 (meters)
SURFACE FRICTION VELOCITY (U*) NOT ADUSTED
METEOROLOGY CONDITIONS USED TO PREDICT OVERALL MAXIMUM IMPACT ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐ YR MO DY JDY HR
‐‐ ‐‐ ‐‐ ‐‐‐ ‐‐
10 01 10  10 01
H0     U*     W*  DT/DZ ZICNV ZIMCH  M‐O LEN    Z0  BOWEN ALBEDO  REF WS ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐  ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐1.30  0.043 ‐9.000  0.020 ‐999.   21.      6.0 1.000   1.50   0.35    0.50 HT  REF TA     HT
‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐

10.0   310.0    2.0
‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ************************ AERSCREEN AUTOMATED DISTANCES ********************** OVERALL MAXIMUM CONCENTRATIONS BY DISTANCE
‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐

MAXIMUM                             MAXIMUM
DIST     1‐HR CONC                  DIST     1‐HR CONC
(m)      (ug/m3)                    (m)      (ug/m3)
‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐               ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐

1.00    0.1439                   2524.99    0.3917E‐02

25.00    0.1562                   2550.00    0.3866E‐02

50.01    0.1678                   2575.00    0.3816E‐02

75.00    0.1783                   2600.00    0.3767E‐02 100.00    0.1880                   2625.01    0.3718E‐02 125.00    0.1969                   2650.00    0.3671E‐02 150.01    0.1408                   2675.00    0.3625E‐02 174.99    0.1149                   2700.00    0.3580E‐02 200.00    0.9449E‐01               2725.00    0.3536E‐02 225.00    0.8082E‐01               2750.00    0.3493E‐02 250.00    0.7086E‐01               2775.00    0.3450E‐02 274.99    0.6316E‐01               2800.00    0.3409E‐02 300.00    0.5698E‐01               2825.00    0.3368E‐02 325.00    0.5191E‐01               2850.00    0.3328E‐02 350.00    0.4760E‐01               2875.00    0.3289E‐02 375.01    0.4392E‐01               2900.00    0.3251E‐02 400.00    0.4074E‐01               2925.00    0.3214E‐02 425.00    0.3793E‐01               2950.00    0.3177E‐02 450.00    0.3547E‐01               2975.00    0.3141E‐02 475.01    0.3326E‐01               2999.99    0.3106E‐02 500.00    0.3131E‐01               3025.00    0.3071E‐02 525.00    0.2952E‐01               3050.00    0.3038E‐02 550.00    0.2791E‐01               3075.00    0.3004E‐02 575.01    0.2645E‐01               3100.00    0.2972E‐02 599.99    0.2511E‐01               3125.00    0.2940E‐02 625.00    0.2389E‐01               3150.00    0.2908E‐02 650.00    0.2277E‐01               3175.00    0.2923E‐02 675.00    0.2174E‐01               3200.00    0.2892E‐02 700.00    0.2078E‐01               3225.00    0.2861E‐02 725.00    0.1989E‐01               3250.00    0.2831E‐02 750.00    0.1907E‐01               3275.00    0.2802E‐02 775.00    0.1831E‐01               3300.00    0.2773E‐02 800.01    0.1759E‐01               3325.00    0.2744E‐02 825.00    0.1692E‐01               3350.00    0.2716E‐02 850.00    0.1629E‐01               3375.00    0.2689E‐02 875.00    0.1571E‐01               3400.00    0.2662E‐02 900.01    0.1516E‐01               3425.00    0.2635E‐02 924.99    0.1464E‐01               3450.00    0.2609E‐02 950.00    0.1415E‐01               3475.00    0.2583E‐02 975.00    0.1369E‐01               3500.00    0.2558E‐02 1000.00    0.1325E‐01               3525.00    0.2533E‐02 1024.99    0.1284E‐01               3550.00    0.2509E‐02 1050.00    0.1244E‐01               3575.00    0.2485E‐02 1075.00    0.1207E‐01               3600.00    0.2461E‐02 1100.00    0.1172E‐01               3625.00    0.2438E‐02 1125.01    0.1139E‐01               3650.00    0.2415E‐02 1150.00    0.1107E‐01               3675.00    0.2393E‐02 1175.00    0.1077E‐01               3700.00    0.2371E‐02 1200.00    0.1047E‐01               3725.00    0.2349E‐02 1225.00    0.1020E‐01               3750.00    0.2328E‐02 1250.00    0.9931E‐02               3775.00    0.2307E‐02 1275.00    0.9677E‐02               3800.00    0.2286E‐02 1300.00    0.9435E‐02               3825.00    0.2265E‐02 1325.00    0.9204E‐02               3850.00    0.2245E‐02 1350.00    0.8983E‐02               3875.00    0.2226E‐02 1375.00    0.8771E‐02               3900.00    0.2206E‐02 1400.00    0.8568E‐02               3925.00    0.2187E‐02 1425.00    0.8372E‐02               3950.00    0.2168E‐02 1449.99    0.8183E‐02               3975.00    0.2149E‐02 1475.00    0.8001E‐02               4000.00    0.2131E‐02 1500.00    0.7825E‐02               4025.00    0.2113E‐02 1525.00    0.7657E‐02               4050.00    0.2095E‐02 1550.00    0.7494E‐02               4075.00    0.2077E‐02 1575.00    0.7337E‐02               4100.00    0.2060E‐02 1600.00    0.7186E‐02               4125.00    0.2043E‐02 1625.00    0.7040E‐02               4150.00    0.2026E‐02 1650.00    0.6900E‐02               4175.00    0.2010E‐02 1675.00    0.6764E‐02               4200.00    0.1993E‐02 1700.00    0.6633E‐02               4225.00    0.1977E‐02 1725.00    0.6506E‐02               4250.00    0.1961E‐02 1750.00    0.6384E‐02               4275.00    0.1946E‐02 1775.00    0.6265E‐02               4300.00    0.1930E‐02 1800.00    0.6150E‐02               4325.00    0.1915E‐02 1825.00    0.6039E‐02               4350.00    0.1900E‐02 1850.00    0.5931E‐02               4375.00    0.1885E‐02 1875.01    0.5827E‐02               4400.00    0.1870E‐02 1900.00    0.5725E‐02               4425.00    0.1856E‐02 1925.00    0.5627E‐02               4450.00    0.1842E‐02 1950.00    0.5531E‐02               4475.00    0.1828E‐02 1975.00    0.5438E‐02               4500.00    0.1814E‐02 2000.01    0.5347E‐02               4525.00    0.1800E‐02 2025.00    0.5259E‐02               4550.00    0.1787E‐02 2050.00    0.5173E‐02               4575.00    0.1773E‐02 2075.00    0.5091E‐02               4600.00    0.1760E‐02 2100.00    0.5011E‐02               4625.00    0.1747E‐02 2125.00    0.4933E‐02               4650.00    0.1734E‐02 2150.00    0.4857E‐02               4675.00    0.1722E‐02 2175.00    0.4783E‐02               4700.00    0.1709E‐02 2200.00    0.4710E‐02               4725.00    0.1697E‐02 2225.00    0.4640E‐02               4750.00    0.1685E‐02 2250.00    0.4571E‐02               4774.99    0.1673E‐02 2275.00    0.4504E‐02               4800.00    0.1661E‐02 2300.00    0.4438E‐02               4825.00    0.1649E‐02 2325.00    0.4374E‐02               4850.00    0.1637E‐02 2350.00    0.4311E‐02               4875.00    0.1626E‐02 2375.00    0.4251E‐02               4900.00    0.1614E‐02 2399.99    0.4191E‐02               4925.00    0.1603E‐02 2425.00    0.4134E‐02               4950.00    0.1592E‐02 2450.00    0.4078E‐02               4975.00    0.1581E‐02 2475.00    0.4023E‐02               5000.00    0.1570E‐02 2500.00    0.3970E‐02
‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ **********************  AERSCREEN MAXIMUM IMPACT SUMMARY  ********************* ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ 3‐hour, 8‐hour, and 24‐hour scaled
concentrations are equal to the 1‐hour concentration as referenced in SCREENING PROCEDURES FOR ESTIMATING THE AIR QUALITY
IMPACT OF STATIONARY SOURCES, REVISED (Section 4.5.4)
Report number EPA‐454/R‐92‐019
http://www.epa.gov/scram001/guidance_permit.htm
under Screening Guidance
MAXIMUM      SCALED      SCALED      SCALED      SCALED 1‐HOUR      3‐HOUR      8‐HOUR     24‐HOUR      ANNUAL
CALCULATION          CONC        CONC        CONC        CONC        CONC PROCEDURE         (ug/m3)     (ug/m3)     (ug/m3)     (ug/m3)     (ug/m3) ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐    ‐‐‐‐‐‐‐‐‐‐  ‐‐‐‐‐‐‐‐‐‐  ‐‐‐‐‐‐‐‐‐‐  ‐‐‐‐‐‐‐ ‐‐‐  ‐‐‐‐‐‐‐‐‐‐ FLAT TERRAIN       0.1982      0.1982      0.1982      0.1982         N/A DISTANCE FROM SOURCE        129.00 meters
IMPACT AT THE
AMBIENT BOUNDARY   0.1439      0.1439      0.1439      0.1439         N/A DISTANCE FROM SOURCE          1.00 meters

ATTACHMENT C

Cancer Risk Calculations
From CalEE Annual Output Emission per day (Ton/Total Constructio n Duration) 0.0074 Construction Start 6/1/2025
Construction Complete 8/7/2026
Days 432
Construction Emission per day (lb/day) 0.034259259
Annual Duration (Days) 365
Annualized Emission Rate (Grams/Second) 1.80E-04
Project Site Size (Acres) 8.57
Project Site Size (meters^2) 34681.55954
Length of Smalles Side (meters) 186.2298567
Used as an input to AERSCREEN Emission Rate over Grading Area( g /s-m^2) 1.97E-01 From AERSCREEN*0.08 Concentration Annual (Ug/M^3) 0.015752 Days Days to years
Duration 432 1.183561644
Age (Years) 3rd Trimester (0.25) 0-2 2-9 2-16 16-30 16-70 Cair (annual) - From F15 0.015752 0.015752 0.015752 0.015752 0.01575 2 0.015752 Breathing Rate per agegroup BR/BW (Page 5-25) 361 1090 861 745 335 29 0 A (Default is 1) 1 1 1 1 1 1
Exposure Frequency = EF (days/365days) 0.96 0.96 0.96 0.96 0.96 0.9 6 10^-6 Microgram to Milligram / liters to m3 0.000001 0.000001 0.00 0001 0.000001 0.000001 0.000001 Dose-inh 0.00000546 0.00001648 0.00001302 0.00001127 0.00000507 0.000 00439 Construction Days 432 1.183561644
potency factor for Diesel 1.1 1.1 1.1 1.1 1.1 1.1
Age Sensitivity Factor 10 10 3 3 1 1
ED 0.25 1.183561644 1.183561644 1.183561644 1.183561644 1.183561644 AT 70 70 70 70 70 70
FAH 0.85 0.85 0.72 0.72 0.73 0.73
Risk for Each Age Group 1.82292E-07 2.60578E-06 5.23057E-07 4.52587 E-07 6.87797E-08 5.95406E-08 Risk per million Exposed 0.182292045 2.605780845 0.523057419 0.4525 8743 0.068779677 0.059540616 Cancer Risk Over Construction Duration 2.79
Air Quality Health Risk Calculations (Worst-Case)
Woodward 46 Unit (PDF Tier 4 )