Pasadena City Council
May 18, 2026

811 W. 7th Street, Suite 200
Los Angeles, CA 90017
(213) 935-1901
www.impactsciences.com

PROJECTS THROUGHOUT CALIFORNIA

MEMORANDUM
To: Rathar
Duong, Senior Planner
City of Pasadena, Planning & Community Development Department Design & Historic Preservation Section
From: Brett Pomeroy, Associate Principal, Impact Sciences Subject: 600 North Rosemead Boulevard Project (Case No. DHP 2026-00073); Response to Appeal
Date: May 8, 2026

INTRODUCTION
The 600 North Rosemead Boulevard Project (Case No. DHP 2026-00073) was approved by the City of Pasadena Design Commission on April 14, 2026. The approval was later appealed on April 24, 2026, by Lower Hastings Ranch Association. Impact Sc iences prepared the Noise and Vibration Technical Report (April 2026) associated with the Project’s Class 32 Categorical Exemption. The appellant states: “The Noise and Vibration Technical Report used to grant a CEQA Class 32 Exemption was incomplete and/or inaccurate, in that it did not state or explain the aggregate noise levels caused by the proposed 150 HVAC outdoor cond enser units and the impact on sensitive receptor sites.” While the Project’s Noise and Vibration Techni cal Report (Technical Report) appropriately addressed the less-than-significant noise impacts due to the operation of HVAC equipment, this memorandum further substantiates the impact conclusion therein.

PROJECT HVAC EQUIPMENT
The Project would include rooftop-mo unted HVAC condenser units and asso ciated mechanical equipment on Buildings A and B. As shown in Attachment A, Project Mechanical Equipment , the rooftop equipment layout diagram illustrates HVAC equipment would generally be centrally located on the roof and screened by equipment screens/louvers in accordance with Pasadena Munici pal Code Section 17.40.150. The Project includes approximately 150 outdoor HVAC condenser units associated with the proposed residential uses across Buildings A and B. HVAC equipment would consist of residential-sc ale ductless outdoor condensing units typical of multi- family residential development.

ATTACHMENT E

Impact Sciences, Inc. 2 600 North Rosemead Boulevard Project 1136.019 May 2026

EXISTING CONDITIONS
The Project Site currently includes existing rooftop me chanical equipment and associated rooftop mechanical screening related to the existing commercial office use. Existing rooftop mechanical equipment is centrally located on the roof and screened from surr ounding views by rooftop screening el ements. Project plans indicate that existing rooftop mechanical equipment would be removed and replaced as part of the proposed adaptive reuse and redevelopment of the site. In addition, surrounding residential and commercial uses in the Project vicinity also include mechanical and HVAC equi pment typically associated with urban residential and commercial development. Thus, the Project’s placement and use of HVAC equipment would be consistent with the existing noise environment in the vicinity of the Project Site.

Noise Sensitive Receptors
As discussed in the Project’s Technical Report, the clos est noise-sensitive receptor s to the Project Site are residences to the south along North Rosemead Boulevard (1 5 feet to the nearest structure), adjacent residences to the east along Rim Road (59 feet to the nearest stru cture), the Sierra Madre Villa Avenue Baseball Field and Church of Jesus Christ of Latter-day Saints (361 feet), and residences across Sierra Madre Villa Avenue (474 feet).

Based on a review of the roof plans in Attachment A, the nearest distances from the rooftop HVAC equipment to the adjacent property lines are approximately 41 feet to the southern property line, 52 feet to the eastern property line, and 74 feet to the northern property line.

Ambient Noise Levels
As discussed in the Technical Report, existing noise levels were monitored at five locati ons in the vicinity of the Project Site. The noise survey was conducted in Janua ry 2026 and February 2026 usin g the Larson Davis Sound Expert 821 (Type 1) sound level meter, which conforms to industry standards set forth in ANSI S1.4-1983 (R2006) – Specification for Sound Level Meters/Type 1. This inst rument was calibrated and operated according to the manufacturer’s written specifications. At the measuremen t sites, the microphone was placed at a height of approximately five feet above grade. As shown in the Technical Report, the daytime ambient noise levels ranged from 51.0 dB(A) Leq to 67.0 dB(A) Leq in the vicinity th e Project Site. Noise from existing mechanical equipment was observed and recorded during ambient noise measurements collected on the Project Site. A noise level of 51 dB(A) Leq was recorded while mechanical equipment was operating on the Project Site at an approximate distance of 30 feet from the measurement. The daytime, evenin g and nighttime noise measurements collected at the Project Site were used to calculate a 24-hour CNEL in the vicinity of the Project Site. The estimated 24-hour ambient noise level at the Project Site fronting Rosemead Boulevard is 71.9 dB(A) CNEL.

Impact Sciences, Inc. 3 600 North Rosemead Boulevard Project 1136.019 May 2026

REGULATORY SETTING
City of Pasadena Municipal Code
As stated in the Technical Report, the City has jurisdiction over noise regulation, as stated in the City’s Municipal Code, Title 9, Chapter 36 Noise Restrictions (Noise Ordi nance). The Noise Ordinance is intended to enforce the City’s policy to prohibit “unnecessary, excessive, and annoying noises from all sources.” The Noise Ordinance generally limits the generation of noise that exceeds the actual measured existing ambient noise level by 5 dB(A) at neighboring properties, with adjustments made for steady audible tones, repeated impulsive noise, and noise occurring for limited periods. Sectio n 9.36.060 sets interior noise level standards for multifamily residential development at 60 dB(A) during daytime hours (7:00 AM to 10:00 PM) and 50 dB(A) during nighttime hours (10:00 PM to 7:00 AM).

Section 9.36.090: Machinery, equipment, fans and air conditioning Except for emergency work, as defined in this chapter it is unlawful for any person to operate any machinery, equipment, pump, fan, air conditioning apparatus or similar mechanical device in any manner so as to create any noise which would cause the noise level at the property line of any property to exceed the ambient noise level by more than 5 decibels.

Section 17.40.150: Screening
A. General requirement. Except as otherwise specified, all new exte rior mechanical equipment, except solar collectors, shall be screened or located out of view from public rights-of-way (not including freeways).

Equipment to be screened includes air conditioning and refrigeration equipment, duct work, heating, plumbing lines, and satellite receiving antennas.

B. Utility meters. Aboveground utility meters shall not be located between the front property line and the front foot of building occupancy or the corner side property line and the front foot of building occupancy.

C. Screening specification. At a minimum, screening materials shall have evenly distributed openings or perforations not exceeding 50 percent of surface area and shall effectively screen mechanical equipment.

D. Exceptions. The following are exceptions to the above screening requirements:

1. Screening requirements are not applicable to an ante nna array consisting of a whip antenna that does not exceed a height of 15 feet or to satellite earth station antennas that are preempted by Part 25 of Title 47 of the Code of Federal Regulations.

Impact Sciences, Inc. 4 600 North Rosemead Boulevard Project 1136.019 May 2026

2. The Zoning Administrator may allow utility meters to be located between the front property line and the front foot of building occupancy or the corner side property line and the front foot of building occupancy when no other location is feasible . Aboveground utility meters located in front or corner yards shall be screened from view from the public right-of-way.

3. Exceptions to the screening of mechanical equipmen t may be approved for projects subject to Design Review in Chapter 17.42 when the equipment is designed as an integral part of the architecture or where the screening enclosure substantially increases the visual mass on the roof line of a structure and alternative treatment may be preferable.

METHODOLOGY
The Project’s potential noise generation from HVAC equipment was assessed by identifying the proposed HVAC noise sources and evaluating the sound levels that could occur at adjacent properties based on the manufacturer- provided sound pressure levels, the number of units proposed, distance attenuation, surrounding ambient noise levels, and applicable City noise standards. Estimated combined sound levels from multiple HVAC units were calculated using methodologies provided in AHRI St andard 275-2018 (R2023) for outdoor unitary equipment sound pressure level calculations. 1 HVAC equipment locations, property line setbacks, and screening features were reviewed based on the rooftop equipment layout diagram and associated architectural plans (see Attachment A).

PROJECT HVAC NOISE IMPACTS
As shown in Attachment A , rooftop HVAC equipment would be setback from surrounding roof edges and clustered within designated screened equipment areas. Based on a review of the roof plans, the nearest rooftop HVAC equipment would be located approximately 41 feet from the southern property line, 52 feet from the eastern property line, and 74 feet from the northern pr operty line. In addition, rooftop HVAC equipment would be screened by equipment screens/louvers in accordance with Pasadena Municipal Code (PMC) Section 17.40.150.

The rooftop equipment screen detail identifies aluminum louver equipment screens with supporting framing intended to visually screen rooftop mechanical equipment from adjacent properties and public viewpoints.

As shown in Attachment A, the HVAC specification sheets provided for the Project identify outdoor sound pressure levels for the proposed condenser units of approximately 58 dBA. Although the manufacturer does not specify a reference distance for this data, HVAC sound pressure ratings are commonly reported at a standardized reference

1 Air-Conditioning, Heating, and Refrigeration Institute, 2018 (Reaffirmed 2023) Standard for Application of Outdoor Unitary Equipment A-weighted Sound Power Rating, 2023. Available at: https://www.ahrinet.org/search-standards/ahri- 275-application-outdoor-unitary-equipment-weighted-sound-power-ratings-sii-p

Impact Sciences, Inc. 5 600 North Rosemead Boulevard Project 1136.019 May 2026
distance of approximately 1 meter (3.3 feet) under laboratory test conditions.2 Accordingly, the reported value is assumed to represent a sound level of approxim ately 58 dBA at 3.3 feet from the equipment. 3 This analysis conservatively assumes concurrent operation of all 150 r ooftop condenser units und er maximum operating conditions. In addition, the analysis conservatively assumes that all units operate at the nearest rooftop HVAC setback distance to each adjacent property line, although the rooftop equipment plans indicate that equipment is distributed across multiple roofto p locations at varying distances from adjacent property lines. Furthermore, while the Project complies with PMC screening requ irements through the use of rooftop equipment screens/louvers (see Attachment A ), the calculations below do not acco unt for additional noise attenuation associated with rooftop screening, building shielding, atmospheric absorption, or other intervening features that may further reduce line-of-sight sound transmi ssion to adjacent properties. As shown in Table 1, Estimated Operational HVAC Noise Levels at Adjacent Property Lines, concurrent operation of all 150 HVAC units would not exceed the ambient noise level by more than 5 decibels at any adjacent property line. Sensitive receptors located at distances beyond the adjacent property lines would experience noise levels below those shown in Table 1. Thus, under a worst-case scenario, the Project would be cons istent with PMC Section 9.36.090 and impacts would be less than significant.

Table 1
Estimated Operational HVAC Noise Levels at Adjacent Property Lines

Adjacent
Property Line
Distance from Nearest HVAC
Equipment (ft)
Ambient Noise
Level (dB(A) Leq)a
Estimated HVAC
Noise Level (dBA Leq)b
Exceed Ambient
Noise by 5 dBA?
South 41 67.0 57.9 No
East 52 51.0 55.8 No
North 74 51.0 52.7 No

a Ambient noise levels and associated measurement data are presented in the Project’s Noise and Vibration Technical Report (April 2026). b Estimated noise levels were calculated assuming each HVAC unit generates 58 dBA at 3.3 feet (1 meter). Calculations conservati vely assume concurrent operation of 150 pieces of HVAC equipment. The combined sound levels for 150 HVAC units were logarithmically added using AHRI methodology presented in Section 4.3.1, equation 3 of AHRI Standard 275-2018.

Source: Air-Conditioning, Heating, and Refrigeration Institute (AHRI). 2023. Application of outdoor unitary equipment A-weighte d sound power ratings (AHRI Standard 275-2018). Page 7. https://www.ahrinet. org/search-standards/ahri-275-application-outdoor-unitary-equipment- weighted-sound-power-ratings-sii-p Impact Sciences, 2026.

2 Air-Conditioning, Heating, and Refrigeration Institute, 2018 (Reaffirmed 2023) Standard for Application of Outdoor Unitary Equipment A-weighted Sound Power Rating, 2023. Available at: https://www.ahrinet.org/search-standards/ahri- 275-application-outdoor-unitary-equipment-weighted-sound-power-ratings-sii-p 3 Ibid.

Impact Sciences, Inc. 6 600 North Rosemead Boulevard Project 1136.019 May 2026

CONCLUSION
As demonstrated above, und er a worst-case scenario, operation of the Project’s HVAC equipment would not exceed applicable City noise standards nor would result in a substantial increase to ambient noise levels at nearby sensitive receptors. Furthermoe, the HVAC equipment proposed by the Project would be typical of residential and infill development within the City and would not repres ent unique or unusual sources of noise. As such, the Project’s Noise and Vibration Technica l Report appropriately concluded noise impacts with respect to HVAC equipment would be less than significant.

Attachment: A (P roject Mechanical Equipment)

ATTACHMENT A
Project Mechanical Equipment

Prepared for:

City of Pasadena
Planning and Development Department
175 North Garfield Avenue
Pasadena, CA 91101
Prepared by:

Impact Sciences, Inc.
811 W. 7th Street, Suite 200
Los Angeles, CA 90017
Contact: Brett Pomeroy, Associate Principal
600 North Rosemead Boulevard Project
Noise and Vibration
Technical Report
April 2026

ATTACHMENT E

Impact Sciences, Inc. 1 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026

TABLE OF CONTENTS
Section Page

1.0 Introduction .................................................................................................................................................. 1

1.1 Project Location .............................................................................................................................. 1

1.2 Existing Site Zoning and Land Use Designations ..................................................................... 1

1.3 Project Characteristics ................................................................................................................... 3

1.4 Project Construction Sequencing ................................................................................................. 5

2.0 Environmental Setting ................................................................................................................................. 6

2.1 Fundamentals of Noise & Vibration ............................................................................................ 6

2.2 Noise Sensitive Receptors ........................................................................................................... 11

2.3 Existing Conditions ...................................................................................................................... 14

3.0 Regulatory Framework .............................................................................................................................. 16

3.1 Federal ........................................................................................................................................... 16

3.2 State ................................................................................................................................................ 17

3.3 Local ............................................................................................................................................... 18

4.0 Noise Analysis ............................................................................................................................................ 21

4.1 Thresholds of Significance .......................................................................................................... 21

4.2 Methodology ................................................................................................................................. 21

4.3 Impact Analysis ............................................................................................................................ 22

5.0 References .................................................................................................................................................... 28 Appendix
A Noise & Vibration Data
B Mechanical Equipment

LIST OF TABLES
Table Page
1 Project Summary .......................................................................................................................................... 3 2 A-Weighted Decibel Scale ........................................................................................................................... 7 3 Building Noise Reduction Factors.............................................................................................................. 8 4 Existing Noise Levels in the Vicinity of the Project Site ........................................................................ 14 5 Guideline Vibration Damage Potential Threshold Criteria .................................................................. 17 6 Land Use Compatibility for Community Noise Environments ........................................................... 20 7 Estimated Exterior Construction Noise ................................................................................................... 23 8 Vibration Levels at Off-Site Structures from Project Construction ..................................................... 26

LIST OF FIGURES
Figure Page
1 Aerial Photograph of Project Site ............................................................................................................... 2 2 Project Site Plan ............................................................................................................................................ 4 3 Noise Monitoring and Sensitive Receptor Location Map. .................................................................... 13

Impact Sciences, Inc. 1 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026

1.0 INTRODUCTION
This Noise and Vibration Technical Report describes the potential for noise and groundborne vibration impacts resulting from implementation of the proposed project located at 600 North Rosemead Boulevard Project (Project) in the City of Pasadena (City). This report includes an evaluation of potential impacts associated with substantial temporary and permanent changes in ambient noise levels in the vicinity of the Project Site in excess of standards established in the City’s General Plan or Noise Ordinance or. applicable standards of other agencies. This rep ort also evaluates whether the Project would result in generation of excessive groundborne vibration or groundborne noise levels, and whether the Project would expose people residing or working the project area to excessive noise levels related to an airpo rt or airstrip. This report has been prepared by Impact Sciences, Inc., in support of the City of Pasadena's (lead agency's) environmental review of the Project being conducted pursuant to the California Environmental Quality Act (CEQA).

1.1 PROJECT LOCATION
The Project Site is located at 600 N. Rosemead Boulevard (APN: 5757-006-060) and is currently developed with a two-story office building and two -story parking structure. Surrounding uses include multi- family residential buildings at the adjacent property to the south, commercial uses to the north and west (acro ss N. Rosemead Boulevard), and low-density residential uses to the east of the Project Site. See Figure 1, Aerial Photograph of the Project Site, which illustrates the location of the Project Site.

1.2 EXISTING CONDITIONS
The Project Site is within the East Pasadena Specific Plan area (EPSP). The City’s General Plan designates the Project Site as ESPS Subarea 2 Commercial Office and is zoned EPSP-D2-CO-D-2. The EPSP-D2-CO-D- 2 zone permits multi- family residential land uses subject to compliance with all development standards.

Pursuant to Pasadena Municipal Code § 17.32.050, multi -family residential uses are permitted in this district, and the East Pasadena Specific Plan requires that such development comply with applicable multi- family (RM) development standards. The Project applies high density residential (RM -48) zone standards which allow for 0 -48 dwelling units per acre, characterized by higher density multi -family complexes in neighborhoods with densities of up to 48 dwelling units per acre and two to three story buildings. 1 1 City of Pasadena, Land Use Element, amended January 2016 and May 2022. Available online at:
https://www.cityofpasadena.net/planning/wp-content/uploads/sites/30/Land-Use-Element-2022-05-

25.pdf?v=1752250820103, accessed January 10, 2026.

Aerial Photograph of the Project Site
FIGURE 1
1136.019•01/26
SOURCE: Esri, 2026

1.0 Introduction
Impact Sciences, Inc. 3 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026

1.3 PROJECT CHARACTERISTICS
The Project would demolish the existing two-story parking structure, convert and expand the existing two- story, 42,518-square-foot office building into a 60,650 sf, 51 -unit affordable housing building (Building A) , and construct a new five-story, 76,089-square-foot building (Building B) with 82 affordable units for a total of 133 units. Each building would include one level of at grade parking. The Project would provide a total of 55 parking spaces and would include 22 on- site bicycle parking spaces. The Pr oject would have an approximate floor area ratio (“FAR”) of 1.29:1 and a maximum height of 71’. The Project would also provide approximately 15,000 sf of open space area within the Project Site and adjacent street frontages (see Figure 2, Project Site Plan). Table 1, Project Summary, below, summarizes the Project’s development envelope.

Table 1
Project Summary

Maximum Allowable/Required Project
Units 103 units + 103 bonus density units (Per PMC
Section 17.22.060 + AB 1287)
133 units
Residential Building Square
Footage
121,030 sf (Per PMC Section 17.22.060) 118,607 sf
Parking Square Footage None 18,132 sf
FAR 1.99:1 (Per PMC Section 17.22.060 + AB 1287
density bonus)

1.29:1
Height 71 feet (with the affordable housing density
bonus per PMC Chapter 17.22 & Chapter 17.42
Section 17.43.040)
71’
Vehicle Parking None (per AB 2097) 55 spaces
Bicycle Parking 22 bicycle parking spaces (per PMC Chapter

17.46, Section 17.46.320)
22 spaces
Open Space 14,850 sf (per PMC Chapter 17.40 + PMC 3.23.010 open space reduction)
15,000 sf

Sources: Project application materials, Pasadena Municipal Code (PMC) 2026, and Impact Sciences 2026.

Access and Parking
As described above, the Project would provide a one level parking garage in each building for a 55 total parking spaces. Vehicular ingress/egress to the Project’s parking garage s would be provided via one driveway for Building A and one driveway for Building B along N. Rosemead Boulevard. To encourage and facilitate the use of public transportation and bicycle use by residents and visitors, the Project would also include 22 bicycle parking spaces.


























 




 
















 





 


 



 



 










 






  


     
 


 
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Project Site Plan
FIGURE 2
1136.019•01/26
SOURCE: Fry Architects, October 2024

1.0 Introduction
Impact Sciences, Inc. 5 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026

1.4 PROJECT CONSTRUCTION SEQUENCING
For the purpose of analyzing impacts associated with construction activities, this analysis assumes a construction schedule of approximately 27 months beginning in 2026. This analysis assumes the Project will be fully operational in 2028. It should be noted that the construction assumptions identified herein are conceptual and are intended to identify worst-case daily impacts. If the Project is built out more slowly and at later dates than those assumed herein, the daily construction intensity would be reduced and associated daily impacts would be generally reduced. Construction activities associated with the Project would involve: (1) demolition, (2) site preparation/grading/foundation preparation, and (3) building construction (including painting and paving).

Demolition and removal of existing debris would occur for approximately two months. This phase would include the demolition of the two- story parking structure on site. Approximately 3,153 cubic yards of building demolition would be required.
2 Site preparation, grading/excavation, and foundation preparation would occur for approximately one month and up to 500 cubic yards (cy) of soil may be exported.

Building construction would occur for approximately 12 months and would include the construction of the proposed structures, connection of utilities, and landscaping the Project Site.

Painting would occur for approximately 12 months with paving occurring concurrently during the final month.

The following maximum daily equipment by phase will be assumed:
• Demolition: 1 concrete/industrial saw, 1 excavator, 1 skid steer loader, 1 tractor/loader/backhoe • Site preparation/grading/foundation preparation: 1 excavator, 1 roller, 1 tractor/loader/backhoe • Building construction: 1 crane, 1 forklift
• Paving and painting: 1 cement and mortar mixer, 1 paver, 1 paving equipment, 2 rollers 1 tractor/loader/backhoes, 1 air compressor

2 Debris volume estimated using the FEMA 329 General Building Formula (LxWxDx0.33/27), which accounts for air space reduction during demolition. The 3,153 cubic yards of demolition debris would generate approximately 1,577 tons, based on the standard Cal Recycle conversion factor of 0.5 tons per cubic yard for mixed construction and demolition debris.

Impact Sciences, Inc. 6 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026

2.0 ENVIRONMENTAL SETTING

2.1 FUNDAMENTALS OF NOISE & VIBRATION
Noise
Noise is usually defined as unwanted sound that is an undesirable byproduct of society’s normal day- to- day activities. Sound becomes unwanted when it interferes with normal activities, when it causes actual physical harm, and/or when it has adverse effects on health. Noise is measured on a logarithmic scale of sound pressure level known as a decibel (dB). The human ear does not respond uniformly to sounds at all frequencies. For example, the human ear is less sensitive to low and high frequencies than mediu m frequencies, which more closely correspond with human speech. In response to the sensitivity of the human ear to different frequencies, the A -weighted noise level (or scale), which corresponds better with people’s subjective judgment of sound levels, has been developed. This A-weighted sound level, referenced in units of dB(A), is measured on a logarithmic scale such that a doubling of sound energy results in a 3 dB(A) increase in noise level. Typically, changes in a community noise level of less than 3 dB(A) are not noticed by the human ear
.3 Changes from 3 to 5 dB(A) may be noticed by some individuals who are sensitive to changes in noise. A greater than 5 dB(A) increase is readily noticeable, while the human ear perceives a 10 dB(A) increase in sound level to be a doubling of sound.

On the A-weighted scale, the range of human hearing extends from approximately 3 to 140 dB(A). Table 2, A-Weighted Decibel Scale, provides examples of A-weighted noise levels from common sources. Noise sources occur in two forms: (1) point sources, such as stationary equipment or individual motor vehicles; and (2) line sources, such as a roadway with a large number of point sources (motor vehicles). Sound generated by a point source typically diminishes (attenuates) at a rate of 6 dB(A) for each doubling of distance from the source to the receptor at acoustically “hard” sites and 7.5 dB(A) at acoustically “soft” sites.4 For example, if a noise source produces a noise level of 89 dB(A) at a reference distance of 50 feet, the noise level would be 83 dB(A) at a distance of 100 feet from the noise source, 77 dB(A) at a distance of 200 feet, and so on. Noise generated by a line source will decrease by approximately 3 dB(A) over hard surfaces and 4.5 dB(A) over soft surfaces for each doubling of distance.

3 California Department of Transportation (Caltrans). 2013. Technical Noise Supplement to the Traffic Noise Analysis Protocol. Available at: https://dot.ca.gov/-/media/dot-media/programs/environmental- analysis/documents/env/tens-sep2013-a11y.pdf
4 Federal Highway Administration, Highway Noise Fundamentals, (1980) 97. Examples of “hard” or reflective sites include asphalt, concrete, and hard and sparsely vegetated soils. Examples of acoustically “soft” or absorptive sites include soft, sand, plowed farmland, grass, crops, heavy ground cover, etc.

2.0 Environmental Setting
Impact Sciences, Inc. 7 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026

Table 2
A-Weighted Decibel Scale

Typical A-Weighted Sound Levels Sound Level (dB(A), Leq) Threshold of Pain 140
Jet Takeoff at 100 Meters 125
Jackhammer at 15 Meters 95
Heavy Diesel Truck at 15 Meters 85
Conversation at 1 Meter 60
Soft Whisper at 2 Meters 35

Source: United States Occupational Safety & Health Administration, Noise and Hearing Conservation Technical Manual, 1999.

Sound levels also can be attenuated by man-made or natural barriers (e.g., sound walls, berms, and ridges), as well as elevational differences. Noise is most audible when traveling by direct line -of-sight, an interrupted visual path between the noise source and noise receptor. Barriers, such as walls or buildings that break the line -of-sight between the source and the receiver, can greatly reduce noise levels from the source since sound can only reach the receiver by diffraction. However, if a barrier is no t high or long enough to break the line-of-sight from the source to the receiver, its effectiveness is greatly reduced.

Solid walls and berms may reduce noise levels by 5 to 10 dB(A) depending on their height and distance relative to the noise source and the noise receptor.
5 Sound levels may also be attenuated 3 dB(A) by a first row of houses and 1.5 dB(A) for each additional row of houses.6 The minimum noise attenuation provided by typical structures in California is provided in Table 3, Building Noise Reduction Factors.

5 Federal Highway Administration, Highway Noise Mitigation, (1980) 18. 6 California Department of Transportation (Caltrans). 2013. Technical Noise Supplement to the Traffic Noise Analysis Protocol. Available at: https://dot.ca.gov/-/media/dot-media/programs/environmental- analysis/documents/env/tens-sep2013-a11y.pdf

2.0 Environmental Setting
Impact Sciences, Inc. 8 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026

Table 3
Building Noise Reduction Factors

Building Type Window Condition
Noise Reduction Due to
Exterior of the Structure
(dB(A))
All Open 10
Light Frame
Ordinary Sash (closed) 20
Storm Windows 25
Masonry
Single Glazed 25
Double Glazed 35

Source: Federal Highway Administration, Highway Traffic Noise: Analysis and Abatement Guidance. December 2011.

Sound Rating Scales
Various rating scales approximate the human subjective assessment to the “loudness” or “noisiness” of a sound. Noise metrics have been developed to account for additional parameters, such as duration and cumulative effect of multiple events. Noise metrics are categorized as single event metrics and cumulative metrics, as summarized below.

In order to simplify the measurement and computation of sound loudness levels, frequency weighted networks have obtained wide acceptance. The A -weighted scale, discussed above, has become the most prominent of these scales and is widely used in community noise analysis. Its advantages are that it has shown good correlation with community response and is easily measured. The metrics used in this analysis are all based upon the dB(A) scale.

Equivalent Noise Level
Equivalent Noise Level (Leq) is the sound level corresponding to a steady- state A-weighted sound level containing the same total energy as several single event noise exposure level events during a given sample period. Leq is the “acoustic energy” average noise level during the period of the sample. It is based on the observation that the potential for noise annoyance is dependent on the total acoustical energy content of the noise. The equivalent noise level is expressed in units of dB(A). Leq can be measured for any period, but is typically measured for 15 minutes, 1 hour, or 24 hours. Leq for a 1-hour period is used by the Federal Highway Administration (FHWA) for assessing highway noise impacts. Leq for 1 hour is referred to as the Hourly Noise Level (HNL) in the California Airport Noise Regulations and is used to develop Community

2.0 Environmental Setting
Impact Sciences, Inc. 9 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026 Noise Equivalent Level values for aircraft operations. Construction noise levels and ambient noise measurements in this section use the Leq scale.

Community Noise Equivalent Level
Community Noise Equivalent Level (CNEL) is a 24-hour, time-weighted energy average noise level based on the A-weighted decibel. It is a measure of the overall noise experienced during an entire day. The term “time-weighted” refers to the penalties attached to noise events occurring during certain sensitive periods.

In the CNEL scale, 5 decibels (dB) are added to measured noise levels occurring between the hours of 7 P.M. and 10 P.M. For measured noise levels occurring between the hours of 10 P.M. and 7 A.M., 10 dB are added.

These decibel adjustments are an attempt to account for the higher sensitivity to noise in the evening and nighttime hours and the expected lower ambient noise levels during these periods. Existing and projected future traffic noise levels in this section use the CNEL scale.

Day-Night Average Noise Level
The day-night average sound level (Ldn) is another average noise level over a 24-hour period. Noise levels occurring between the hours of 10 P.M. and 7 A.M. are increased by 10 dB . This noise is weighted to take into account the decrease in community background noise of 10 dB(A) during this period. Noise levels measured using the Ldn scale are typically similar to CNEL measurements.

Adverse Effects of Noise Exposure
Noise is known to have several adverse effects on humans, which has led to laws and standards being set to protect public health and safety, and to ensure compatibility between land uses and activities. Adverse effects of noise on people include hearing loss, communication interference, sleep interference, physiological responses, and annoyance. P ublic agencies have established quantitative thresholds to address potential human health effects associated with noise exposure. Prolonged exposure to high noise levels can result in hearing loss, with occupational standards establishing a limit of 90 dBA Leq over an 8 - hour period to protect workers from permanent hearing damage. 7 At the community level, noise exposure
has been shown to result in increased annoyance and sleep disturbance, which are recognized contributors to stress and reduced quality of life. Studies indicate that the percentage of individuals highly annoyed by noise increases from approximately 7 percent at 55 dBA Ldn to 23 percent at 70 dBA Ldn. 8 In addition,
noise levels of 40 to 50 dBA may interfere with the ability to fall asleep, while noise levels of 70 dBA or

7 Cal/OSHA, Title 8 Regulations, Subchapter 7. General Industry Safety Orders, Group 15. Occupational Noise, Article 105. Control of Noise Exposure, §5096. Exposure Limits for Noise, Table N-1 Permissible Noise Exposure. 8 EPA, Noise Effects Handbook: A Desk Reference to Health and Welfare Effects of Noise, October 1979, Revised July 1981.

2.0 Environmental Setting
Impact Sciences, Inc. 10 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026 higher can result in awakening.9 Each of these potential noise impacts on people is briefly discussed in the following narrative.

Hearing Loss
Hearing loss is generally not a community noise concern, even near a major airport or a major freeway. The potential for noise-induced hearing loss is more commonly associated with occupational noise exposures in heavy industry, very noisy work environment s with long -term exposure, or certain very loud recreational activities (e.g., target shooting and motorcycle or car racing). The Occupational Safety and Health Administration (OSHA) identifies a noise exposure limit of 90 dB(A) for 8 hours per day to prot ect from hearing loss (higher limits are allowed for shorter duration exposures). Noise levels in neighborhoods, even in very noisy neighborhoods, are not sufficiently loud enough to cause hearing loss.

Communication Interference
Communication interference is one of the primary concerns in environmental noise. Communication interference includes speech disturbance and intrusion with activities such as watching television. Noise can also interfere with communications such as within school classrooms. Normal conversational speech is in the range of 60 to 65 dB(A) and any noise in this range or louder may interfere with speech.

Sleep Interference
Noise can make it difficult to fall asleep, create momentary disturbances of natural sleep patterns by causing shifts from deep to lighter stages, and cause awakening. Noise may even cause awakening that a person may or may not be able to recall.

Physiological Responses
Physiological responses are those measurable effects of noise on people that are realized as changes in pulse rate, blood pressure, and other physical changes. Studies to determine whether exposure to high noise levels can adversely affect human health hav e concluded that, while a relationship between noise and health effects seems plausible, there is no empirical evidence of the relationship.

Annoyance
Annoyance is an individual characteristic and can vary widely from person to person. Noise that one person considers tolerable can be unbearable to another of equal hearing capability. The level of annoyance

9 EPA, Noise Effects Handbook: A Desk Reference to Health and Welfare Effects of Noise, Page 6 -2, October 1979, Revised July 1981

2.0 Environmental Setting
Impact Sciences, Inc. 11 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026 depends both on the characteristics of the noise (including loudness, frequency, time, and duration), and how much activity interference (such as speech interference and sleep interference) results from the noise.

However, the level of annoyance is also a function of the attitude of the receiver. Attitudes may also be affected by the relationship between the person affected and the source of noise, and whether attempts have been made to abate the noise.

Vibration
Vibration consists of waves transmitted through solid material. Groundborne vibration propagates from a source through the ground to adjacent buildings by surface waves. Vibration may comprise a single pulse, a series of pulses, or a continuous oscillatory motion. The frequency of a vibrating object describes how rapidly it is oscillating and is measured in hertz (Hz). Most environmental vibrations consist of a composite, or “spectrum” of many frequencies, and are generally classified as broadband or random vibrations. The normal frequency range of most groundborne vibration that can be felt generally starts from a low frequency of less than one Hz to a high of about 200 Hz. Vibration is often measured in terms of the peak particle velocity (PPV) in inches p er second (in/sec) when considering impacts on buildings or other structures, as PPV represents the maximum instantaneous peak of vibration that can stress buildings.

Because it is a representation of acute vibration, PPV is often used to measure the tempo rary impacts of short-term construction activities that could instantaneously damage -built structures. Vibration is often also measured by the root mean squared (RMS) because it best correlates with human perception and response. Specifically, RMS represents “smoothed” vibration levels over an extended period of time and is often used to gauge the long -term chronic impact of a p roject’s operation on the adjacent environment.

RMS amplitude is the average of a signal’s squared amplitude. It is most commonly m easured in decibel notation (VdB).

Vibration energy attenuates as it travels through the ground, causing the vibration amplitude to decrease with distance away from the source. High frequency vibrations reduce much more rapidly than low frequencies, so that in the far-field from a source, the low frequencies tend to dominate. Soil properties also affect the propagation of vibration. When groundborne vibration interacts with a building, there is usually a ground-to-foundation coupling loss (i.e., the foundation of the structure does not move in sync with the ground vibration), but the vibration can also be amplified by the structural resonances of the walls and floors. Vibration in buildings is typically perceived as rattling of windows or items on shelves, or the motion of building surfaces. At high levels, vibration can result in damage to structures.

Manmade groundborne vibration is generally limited to areas within a few hundred feet of certain types of construction activities, especially pile driving. Road vehicles rarely create enough groundborne vibration to be perceptible to humans unless the road surface is poorly maintained and there are potholes or bumps.

2.0 Environmental Setting
Impact Sciences, Inc. 12 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026 If traffic induces perceptible vibration in buildings, such as window rattling or shaking of small loose items (typically caused by heavy trucks in passing), then it is most likely an effect of low-frequency airborne noise or ground characteristics. Human annoyance by vibration is related to the number and duration of events.

The more events or the greater the duration, the more annoying it will be to humans.

2.2 NOISE SENSITIVE RECEPTORS
Noise-sensitive land uses are generally considered to include those uses where noise exposure could result in health-related risks to individuals, as well as places where quiet is an essential element of their intended purpose. Residential dwellings are of primary concern because of the potential for increased and prolonged exposure of individuals to both interior and exterior noise levels. Additional land uses such as certain passive use parks, historic sites, cemeteries, and natural recreation areas are c onsidered sensitive to increases in exterior noise levels. Schools, churches, hotels, libraries, and other places where low interior noise levels are essential are also considered noise-sensitive land uses. The closest noise-sensitive receptors to the Proj ect Site are residences to the south along North Rosemead Boulevard (15 feet to the nearest structure), adjacent residences to the east along Rim Road (59 feet to the nearest structure), the Sierra Madre Villa Avenue Baseball Field and Church of Jesus Chri st of Latter -day Saints 10 (361 feet), and residences
across Sierra Madre Villa Avenue (474 feet).See Figure 3, Noise Monitoring and Sensitive Receptor Location Map.

10 While sports fields are generally not sensitive noise receptors, this analysis conservatively considers the park/open space component of this use as a noise sensitive receptor.

Noise Monitoring and Sensitive Receptor Location Map
FIGURE 3
1136.019•03/26
SOURCE: Esri, 2026

2.0 Environmental Setting
Impact Sciences, Inc. 14 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026

2.3 EXISTING CONDITIONS
Measured Ambient Noise Levels
To establish baseline noise conditions, existing noise levels were monitored at five locations in the vicinity of the Project Site. The locations of where the noise measurements were taken are depicted in Figure 3, Noise Monitoring and Sensitive Receptor Location Map. The noise survey was conducted in January 2026 and February 2026 using the Larson Davis Sound Expert 821 (Type 1) sound level meter, which conforms to industry standards set forth in ANSI S1.4 -1983 (R2006) – Specification for Sound Level Meters/Type 1 .

This instrument was calibrated and operated according to the manufacturer’s written specifications. At the measurement sites, the microphone was placed at a height of approximately five feet above grade. The results of the measurements are summarized in Table 4, Existing Noise Levels in the Vicinity of the Project Site. As shown in Table 4, the daytime ambient noise levels ranged from 5 1.0 dB(A) Leq to 6 7.0 dB(A) Leq in the vicinity the Project Site. The daytime, evening and night noise measurements collected at Noise Monitoring Location 1 (presented in Table 4) were used to calculate 24-hour CNEL in the vicinity of the Project Site. The estimated 24-hour ambient noise level at the Project Site fronting Rosemead Boulevard (Noise Monitoring Location 1) is 71.9 dB(A) CNEL. See Appendix A to this report.

Table 4
Existing Noise Levels in the Vicinity of the Project Site

Noise Monitoring Locations Primary Noise Sources Noise Levels [dB(A)] Leq Lmin Lmax
Daytime (7AM – 7 PM)

1. Project Site Vehicle Traffic, Neighborhood Activity 67.0 45.0 78.4

2. Residences to the southeast Vehicle Traffic, Neighborhood Activity 59.3 32.5 84.0

3. Sierra Madre Villa Avenue
Baseball Field Vehicle Traffic, Neighborhood Activity 63.6 33.6 78.8

4. Residences along Sierra Madre
Villa Avenue Vehicle Traffic, Neighborhood Activity 66.6 48.8 81.6

5. Residences to the east Wind, Project Site Mechanical Equipment 51.0 46.3 67.0 Evening (7PM -10PM)

1. Project Site Vehicle Traffic, Neighborhood Activity 64.2 48.8 79.5 Night (10PM – 7AM)

1. Project Site Vehicle Traffic 65.0 46.6 78.1

Source: Impact Sciences, Inc., February 2026. See Appendix A, Noise Data. As shown therein, 15 -minute Leq data was collected for all locations.

2.0 Environmental Setting
Impact Sciences, Inc. 15 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026 Existing Groundborne Vibration Levels
The main sources of groundborne vibration near the Project Site are heavy -duty vehicular travel (e.g., refuse trucks, delivery trucks, and transit buses) on local roadways. Trucks and buses typically generate groundborne vibration velocity levels of around 63 VdB at 50 feet, and these levels could reach 72 VdB where trucks and buses pass over bumps in the road. In terms of PPV levels, a heavy-duty vehicle traveling at a distance of 50 feet can result in a vibration level of approximately 0.001 inch per seco nd.

Impact Sciences, Inc. 16 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026

3.0 REGULATORY FRAMEWORK

3.1 REGULATORY FRAMEWORK
There are several plans, regulations, and programs that include policies, requirements, and guidelines regarding noise and vibration at the federal, state, regional, and local levels. As described below, these plans, guidelines, and laws include the following:
• Occupational Safety and Health Act of 1970
• Noise Control Act of 1972
• Federal Transit Administration Vibration Standards
• Office of Planning and Research Guidelines for Noise Compatible Land Use • Los Angeles County Airport Land Use Commission Comprehensive Land Use Plan • City of Pasadena General Plan
• Pasadena Municipal Code
The following documents and studies were also considered in the evaluation and determination of impacts for the Project:
• EPA – Noise Effects Handbook: A Desk Reference to Health and Welfare Effects of Noise • Cal/OSHA – Title 8 Regulations, Subchapter 7. General Industry Safety Orders, Group 15, Occupational Noise, Article 105. Control of Noise Exposure, §5096.
• Caltrans – Traffic Noise Analysis Protocol, Chapter 3.2 • Caltrans – Technical Noise Supplement to the Traffic Noise Analysis Protocol • Caltrans – Transportation and Construction Vibration Guidance Manual, Chapter 7.3 Evaluating Potential Vibration Impacts
Federal
Occupational Safety and Health Act of 1970. Under the Occupational Safety and Health Act of 1970 (29 U.S.C. §1919 et seq.), the Occupational Safety and Health Administration (OSHA) has adopted regulations designed to protect workers against the effects of occupational noise exposure. These regulations list permissible noise level exposure as a function of the amount of time during which the worker is exposed.

The regulations further specify a hearing conservation program that involves monitoring noise to wh ich

3.0 Regulatory Framework
Impact Sciences, Inc. 17 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026 workers are exposed, ensuring that workers are made aware of overexposure to noise, and periodically testing the workers’ hearing to detect any degradation. 11 Noise Control Act of 1972 . Under the authority of the Noise Control Act of 1972, the United States Environmental Protection Agency (U.S. EPA) established noise emission criteria and testing methods published in Parts 201 through 205 of Title 40 of the Code of Federal Regulations (CFR) that apply to some transportation equipment (e.g., interstate rail carriers, medium trucks, and heavy trucks) and construction equipment. In 1974, U.S. EPA issued guidance levels for the protection of public health and welfare in residential areas of an outdoor L
dn of 55 dBA and an indoor L dn of 45 dBA. These guidance levels are not standards or regulations and were developed without consideration of technical or economic feasibility.

Federal Transit Administration Vibration Standards. There are no federal vibration standards or regulations adopted by any agency that are applicable to evaluating vibration impacts from activities associated with the Project. However, the Federal Transit Administration (FTA) has adopted vibration criteria for use in evaluating vibration impacts from construction activities. The vibration damage criteria adopted by the FTA are shown in Table 5, Construction Vibration Damage Criteria.

Table 5
Construction Vibration Damage Criteria

Building Category PPV (in/sec)
I. Reinforced-concrete, steel, or timber (no plaster) 0.5 II. Engineered concrete and masonry (no plaster) 0.3
III. Non-engineered timber and masonry buildings 0.2
IV. Buildings extremely susceptible to vibration damage 0.12

Source: FTA, Transit Noise and Vibration Impact Assessment Manual, 2018.

State
Office of Planning and Research Guidelines for Noise Compatible Land Use. The State of California has not adopted statewide standards for environmental noise, but the Governor’s Office of Planning and Research (OPR) has established guidelines for evaluating the compatibility of various land uses as a function of community noise exposure. The City has developed its own compatibility guidelines in the

11 United States Department of Labor. OSH Act of 1970. https://www.osha.gov/laws -regs/oshact/completeoshact.

Accessed August 2025.

3.0 Regulatory Framework
Impact Sciences, Inc. 18 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026 Noise Element of the General Plan based in part on OPR Guidelines, see Table 6, Guidelines for Noise Compatible Land Use (CNEL) later in this report. California Government Code Section 65302 requires each county and city in the State to prepare and adopt a comprehensive long-range general plan for its physical development, with Section 65302(f) requiring a noise element to be included in the general plan. The noise element must: (1) identify and appraise noise problems in the community; (2) recognize Office of Noise Control guidelines; and (3) analyze and quantify current and projected noise levels.

Title 24, California Code of Regulations. The California Noise Insulation Standards of 1988 (California Code of Regulations Title 24, Section 3501 et seq.) require that interior noise levels from the exterior sources not exceed 45 dB(A) Ldn/community noise equivalent level (CNEL) 12 in any habitable room of a multi - residential use facility (e.g., hotels, motels, dormitories, long-term care facilities, and apartment houses and other dwellings, except detached single-family dwellings) with doors and windows closed. Where exterior noise levels exceed 60 dB(A) CNEL/Ldn, an acoustical analysis is required to show that the building construction achieves an interior noise level of 45 dB(A) CNEL/Ldn or less.

Local
City of Pasadena General Plan
The City of Pasadena General Plan contains policies and programs to achieve and maintain noise levels compatible with various types of land uses. The Noise Element provides policy-level direction for the City to limit people’s exposure to noise. The following policies are found in the Noise Element of the Pasadena General Plan:

Objective 2 The City will work to reduce the effects of traffic -generated noise from major roadways on residential and other sensitive land uses.

Policy 2a The City will encourage noise -compatible land uses along major roadways.

Policy 2b The City will encourage site planning and traffic control measures that minimize the effects of traffic noise in residential zones.

Policy 2e The City will work to reduce the effects of traffic -related noise in residential neighborhoods, including but not limited to neighborhoods adjacent to South Orange Grove Boulevard, Saint John Avenue, Pasadena

12 Measurements are based on Ldn or CNEL.

3.0 Regulatory Framework
Impact Sciences, Inc. 19 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026 Avenue, California Boulevard, and other busy streets passing through residential neighborhoods.

Objective 7 The City will minimize the effects of nuisance noise on sensitive land uses to the degree feasible.

Policy 7b The City will encourage limitations on construction activities adjacent to sensitive noise receptors.

Policy 7c The City will encourage construction and landscaping activities that employ techniques to minimize noise.

Policy 7d The City will enforce noise level restrictions contained in the City of Pasadena Noise Regulations (Chapter 9.36 of the Municipal Code), except during federal, State, or local emergencies (such as power generators required for energy emergencies).

City of Pasadena Municipal Code
The City has jurisdiction over noise regulation, as stated in the City’s Municipal Code, Title 9, Chapter 36 Noise Restrictions (Noise Ordinance). The Noise Ordinance is intended to enforce the City’s policy to prohibit “unnecessary, excessive, and annoyin g noises from all sources.” The Noise Ordinance generally limits the generation of noise that exceeds the actual measured existing ambient noise level by 5 dB(A) at neighboring properties, with adjustments made for steady audible tones, repeated impulsive noise, and noise occurring for limited periods. Section 9.36.060 sets interior noise level standards for multifamily residential development at 60 dB(A) during daytime hours (7:00 AM to 10:00 PM) and 50 dB(A) during nighttime hours (10:00 PM to 7:00 AM).

The City’s noise ordinance includes specific provisions regarding construction noise. Section 9.36.070 of the Municipal Code prohibits the operation of construction equipment and construction activity except from 7:00 AM to 7:00 PM Monday through Friday, and from 8:00 AM to 5:00 PM on Saturday in or within 500 feet of a residential district. Operation of construction equipment is prohibited on Sunday and on defined holidays. Section 9.36.080 of the Municipal Code prohibits the operation of powered construct ion equipment that generates a noise level of 85 dB(A) when measured at 100 feet.

3.0 Regulatory Framework
Impact Sciences, Inc. 20 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026

Table 6
Land Use Compatibility for Community Noise Environments

Land Use Category
Community Noise Exposure (dB, Ldn or CNEL)
55 60 65 70 75 80 Residential - Low Density Single-Family, Duplex,
Mobile Homes

Residential - Multi-Family and Mixed
Commercial/Residential Use

Transient Lodging - Motels Hotels

Schools, Libraries, Churches, Hospitals, Nursing Homes

Auditoriums, Concert Halls, Amphitheaters

Sports Arena, Outdoor Spectator Sports

Playgrounds, Neighborhood Parks

Golf Courses, Riding Stables, Water Recreation,
Cemeteries

Office Buildings, Business Commercial and Professional

Industrial, Manufacturing, Utilities, Agriculture

Clearly Acceptable - Specified land use is satisfactory, based upon the assumption that any buildings involved are of normal conventional construction without any special noise insulation requirements.

Normally Acceptable - New construction or development should be undertaken only after a detailed analysis of the noise reduction requirements is made and needed noise insulation features included in the design. Conventional construction, but with closed windows and fresh air supply system or air conditioning will normally suffice.

Conditionally Acceptable - If new construction or development proceeds, an analysis of the noise reduction requirements should be made and needed noise insulation features included in the design.

Normally Unacceptable - New construction or development should generally not be undertaken, unless it can be demonstrated that an interior level of 45 dBA can be achieved.

*Please note that these guidelines are general and may not apply to specific sites.

Source: California General Plan Guidelines, 1998, as modified by the City of Pasadena General Plan Noise Element, 2002.

Impact Sciences, Inc. 21 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026

4.0 NOISE & VIBRATION ANALYSIS

4.1 THRESHOLDS OF SIGNIFICANCE
The impacts of the Project related to noise and vibration would be considered significant if they would exceed any of the following Thresholds of Significance, in accordance with Appendix G of the California Environmental Quality Act (CEQA) Guidelines:
• Generation of a substantial temporary or permanent increase in ambient noise levels in the vicinity of the Project Site in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies;
• Generation of excessive ground-borne vibration or ground-borne noise levels; and • For a project located within the vicinity of a private airstrip or an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the Project expose people residing or working in the Project area to excessive noise levels.

The State CEQA Guidelines do not provide a definition for “substantial increase” of noise and do not establish a numerical threshold of significance for potential noise or vibration impacts. Accordingly, the thresholds of significance used in this analysis are based on applicable regulatory standards, the City’s General Plan Noise Element, and the Pasadena Municipal Code (PMC). These standards do not specify a daytime numerical threshold because ambient noise levels are naturally higher during the day due t o sources such as traffic, maintenance, and construction activities. Daytime construction activities are temporary and periodic. This approach accounts for the urban environment of the City and recognizes that such activities are common and generally not e xpected to disturb the general public’s sleep . Daytime construction noise levels are further reduced by existing building codes for certain types of structures. For example, the State has established noise insulation standards for new multi-family residential units, hotels, and motels through the California Noise Insulation Standards (Title 24, California Code of Regulations).

These standards set an interior noise limit of 45 dBA CNEL in any habitable room and require an acoustical analysis demonstrating that dwelling units are designed to meet this standard where exterior noise levels exceed 60 dBA CNEL.

4.2 METHODOLOGY
Noise levels associated with project -related construction activities were calculated using the FHWA Roadway Construction Noise Model (RCNM). Noise levels were compared to the City’s noise ordinance

4.0 Noise Analysis
Impact Sciences, Inc. 22 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026 which includes provisions regarding construction noise levels, which prohibits a noise level of 85 dB(A) when measured at 100 feet.

The Project’s potential to result in significant noise impacts from on -site operational noise sources (i.e., mechanical equipment and parking activities) was assessed by considering the impact that they could produce given the nature of the source (i.e., loudness and whether noise would be produced during daytime or more-sensitive nighttime hours), distances to nearby sensitive receptors, surrounding ambie nt noise levels, the presence of similar noise sources in the vicinity, and maximum allowable noise lev els permitted by the City’s municipal code. CEQA Guidelines Section 21085 states: "for residential projects, the effects of noise generated by project occupants and their guests on human beings is not a significant effect on the environment.” Thus, noise generated by Project occupants and their guests is not further assessed in this report.

The State CEQA Guidelines do not define the levels at which noise would be considered substantial increases. Thus, for purposes of this analysis, the Project would normally have a significant impact on off- site roadway noise levels from project operations if the project causes the ambient noise level measured at the property line of affected uses to increase by 3 dB(A) if the total ambient noise levels without the Project exceed the City’s General Plan exterior noise standards, or any 5 dB(A) or greater noise increase when total ambient noise levels without the Project are within the City’s exterior noise standards.

Construction activities have the greatest potential to generate groundborne vibration affecting nearby receivers. Since groundborne vibration could cause physical damage to structures, vibration impacts were modeled based on FTA guidance and on the distance from the location of vibration-intensive construction activities to nearby structures.

4.3 IMPACT ANALYSIS
Impact NOI-1 Would the project result in generation of a substantial temporary or permanent increase in ambient noise levels in the vicinity of the p roject in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies? (Less than Significant).

Construction Noise
Construction of the Project would require the use of heavy equipment for demolition, grading, building fabrication, paving and finishing. Construction activities could also involve the use of smaller power tools, generators, and other sources of noise. During each stage of construction, several types of equipment potentially could be operating concurrently, and noise levels would vary based on the amount of

4.0 Noise Analysis
Impact Sciences, Inc. 23 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026 equipment in operation and the location of the activity. The FHWA RCNM has compiled data regarding the noise-generating characteristics of specific types of construction equipment and typical construction activities.

With the use of the RCNM, as detailed in Appendix A to this report, 13 the construction noise levels forecasted for each phase of construction are presented in Table 7, Estimated Exterior Construction Noise.

Noise levels would diminish notably with distance from the construction site at a rate of 6 dB(A) per doubling of distance (noise from stationary or point sources is reduced by about 6 dB(A) for every doubling of distance at acoustically hard locations). For example, a noise level of 86 dB(A) Leq measured at 50 feet from the noise source to the receptor would decline to 80 dB(A) Leq at 100 feet from the source to the receptor and fall by another 6 dB(A) Leq to 74 dB(A) Leq at 200 feet from the source to the receptor. These noise attenuation rates assume a flat and unobstructed distance between the noise generator and the receptor. Intervening structures and vegetation would further attenuate (reduce) the noise. Furthermore, it should be noted that increases in noise levels at sensitive receptors during construction would be intermittent and temporary and would not generate continuously high noise levels.

Table 7
Estimated Exterior Construction Noise

Construction Phase
Estimated Temporary
Noise Levels at 100 Feet
[dB(A) Leq]
Exceed Municipal Code
Standards?
Demolition 81.0 No
Grading 76.2 No
Building Construction 76.9 No
Source: Impact Sciences, Inc., March 2026. See Appendix A to this report. Building construction includes construction equipment anticipated for building fabrication, paving and architectural coatings.

As noted above, S ection 9.36.080 of the Pasadena Municipal Code requires that construction equipment noise not exceed 85 dB(A) when measured within a radius of 100 feet from such equipment. As shown in Table 7, construction noise levels would not exceed the standards set forth in the Pasadena Municipal Code. Furthermore, the Project would adhere to City regulations governing hours of construction, noise levels generated by construction and mechanical equipment, and the allowed level of ambient noise (Chapter 9.36 of the Pasadena Municipal Code). In accordance with these regulations, construction noise

13 Project construction noise levels were calculated based on the Project’s anticipated mix of construction equipment with the FHWA RCNM Version 1.1.

4.0 Noise Analysis
Impact Sciences, Inc. 24 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026 would be limited to normal working hours (7 a.m. to 7 p.m. Monday through Friday, 8 a.m. to 5 p.m. on Saturday, in or within 500 feet of a residential area).

Construction noise generated by the Project would be generally consistent with noise levels and source types commonly associated with urban development and redevelopment activities in the City of Pasadena.

Typical construction activities for residential, commercial, and infrastructure projects including home remodels, additions, and site improvements utilize similar equipment (e.g., excavators, loaders, compressors, and power tools) and generate comparable noise levels. As such, construction noise is a common and expected part of the existing noise environment in developed urban areas such as the Project Site. While these activities can result in temporary increases in noise levels, they are intermittent in nature and regulated by the City’s Municipal Code. Therefore, project -related construction noise would not represent a new or unusual source of noise beyond what is typically experienced in the Project vicinity. As such, construction noise impacts would be less than significant.

Operational Noise
Traffic Noise
As discussed previously, operational traffic noise level increases would be considered significant if the Project causes ambient noise levels measured at the property line of affected uses to increase by 3 dBA if the total ambient noise levels without the Project exceed the City’s General Plan exterior noise standards as shown in Table 6, Land Use Compatibility for Community Noise Environments , or any 5 dBA or greater noise increase. Studies have shown that a 3 dB(A) increase in sound level pressure is barely detectable by the human ear. A 3 dB(A) increase in roadway noise levels requires an approximate doubling of roadway traffic volume, assuming that travel speeds and fleet mix remain constant. 14 This traffic noise analysis relies on the data provided in the Project’s Trip Generation Estimates (see Appendix A to this report). As shown therein, the Project would generate a maximum of 486 net daily trips.

The closest roadway to the Project Site with a recorded average daily traffic volume is N. Rosemead Boulevard, located adjacent to the Project Site. According to City data, N. Rosemead Boulevard carries approximately 14,971 average daily trips. 15 Since it would take a doubling (i.e., a 100% increase) of roadway traffic volume to increase noise levels by 3 dBA, the addition of traffic volume from operation of the Project (486 daily trips) would not increase traffic to levels capable of producing a 3 dBA ambient noise

14 California Department of Transportation, Technical Noise Supplement to the Traffic Noise Analysis Protocol, 2013,. Available online at: https://dot.ca.gov/-/media/dot-media/programs/environmental- analysis/documents/env/tens-sep2013-a11y.pdf, accessed March 6, 2026. 15 City of Pasadena, Rosemead Boulevard Traffic Count Data, available at:
https://pasadena.public.ms2soft.com/tcds/tsearch.asp?mod=tcds , accessed March 4, 2026.

4.0 Noise Analysis
Impact Sciences, Inc. 25 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026 increase. As such, any noise increase due to vehicle trips would be imperceptible, and impacts would be less than significant.

Parking Noise
Various noise events would occur periodically from the Project’s parking garage . Such periodic events would include activation of car alarms, sounding of car horns, slamming of car doors, engine revs, and tire squeals. Automobile movements would comprise the most continuous noise source and would generate a noise level of approximate ly 65 dB(A) at a distance of 25 feet. Car alarm and horn noise events generate sound levels as high as 75 dB(A) at a reference distance of 25 feet, however these noise sources would be sporadic.

The Project would demolish an existing two -story parking garage containing 120 spaces and provide 55 parking spaces in a one-story garage at the ground level. Thus, the Project would generally reduce on-site parking noise sources and parking-related noise sources would not be visible from off-site locations due to the enclosed design. It should also be noted that the existing urban environment of the Project Site currently generates noise levels associated with parking and vehicular noise sources identifie d above. Although the Project would include on- site parking, the types of noise associated with parking would be similar or reduced compared to those currently occurring on site and in the vicinity of the Project Site. As such, noise impacts from the parking areas would be less than significant.

Stationary Noise Sources
As part of the Project, new mechanical equipment, HVAC units, and exhaust fans could be installed on the roof or near the proposed structures. Although the operation of this equipment would generate noise, the design of these on-site HVAC units and exhaust fans would be required to comply with the regulations of the PMC. Specifically, PMC Section 9.36.090 provides regulations for noise from machinery, equipment, fans and air conditioning. As stated therein, it is unlawful to operate any machinery, equipment , pump, fan, air conditioning apparatus or similar mechanical device in any manner so as to create any noise which would cause the noise level at the property line of any property to exceed the ambient noise level by more than 5 decibels. As shown previously in Table 4 , noise from mechanical equipment was observed and recorded during ambient noise measurements collected on the Project Site. A noise level of 51 dB(A) Leq was recorded at location 5, while mechanical equipment was operating on the Project Site at an approximate distance of 30 feet from the measurement. The P roject include s the use of similar outdoor mechanical equipment, typical of a multi-family residential use (see Appendix B, Mechanical Equipment).

According to the engineering manual for the proposed mechanical equipment , outdoor equipment noise

4.0 Noise Analysis
Impact Sciences, Inc. 26 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026 levels would range between 47 and 56 dB(A).16 Thus, noise from mechanical equipment would not exceed 56 dB(A) Leq at the nearest sensitive receptor. Furthermore, a s shown in Table 4, ambient noise levels in the Project Site vicinity reach up to 67.0 dB(A) Leq. Based on an estimated noise level of 5 6 dB(A) Leq for the proposed HVAC equipment, noise levels from such equipment would generally not exceed ambient noise levels and would not have the potential to increase ambient noise levels at off-site sensitive receptors by greater than 5 dB(A). Furthermore, as the Project is an infill residential development and is surrounded by existing residential and commercial uses, mechanical and HVAC noise from the Project would be substantially similar to existing conditions in the Project area. As such, noise from stationary sources would be less than significant.

Impact NOI-2 Would the p roject result in the generation of excessive groundborne vibration or groundborne noise levels? (Less than Significant).

There are no vibration standards or regulations adopted by any agency that are applicable to evaluating vibration impacts from activities associated with the Project. However , the FTA has published vibration criteria for use in evaluating vibration impacts from construction activities for FTA projects, which can be utilized as general guidance. The vibration damage criteria published by the FTA are shown previously in Table 5.

The vibration levels at nearby receptors are shown below in Table 8, Vibration Levels at Off -Site Uses from Project Construction.

16 LG, R32 Single -Zone Four -Way Cassette Engineering Manual , available at:
https://www.supplyhouse.com/product_files/LG-KUSXB091A-Engineering.pdf, accessed March 25, 2026.

Reference noise levels were measured in an anechoic chamber under ISO Standard 3745.

4.0 Noise Analysis
Impact Sciences, Inc. 27 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026

Table 8
Vibration Levels at Off-Site Uses from Project Construction

Off-Site Receptorsa Distance to
Project Site (ft.)
Receptor
Significance
Threshold PPV
(in./sec)
Estimated PPV
(in./sec)

1. Residential structures to the south of the Project Site 15 feet 0.20 0.19

2. Commercial structures to the north 24 feet 0.20 0.09

3. Residential structures to the east of the Project Site 59 feet 0.20 0.02

a See Figure 3, Noise Monitoring and Sensitive Receptor Location Map.

Source: Impact Sciences, Inc., March 2026. See Appendix A to this report.

The vibration velocities predicted to occur at the nearest receptors to the Project Site (residential structures to the south ) would be 0.19 in/sec PPV. The residences to the south were built in 1994, the commercial structures to the north were built in 1981, and the residential structures to the east were built in 1950.17 For these reasons, this analysis conservatively applies the vibration damage criterion of 0. 20 inch/sec PPV for “non-engineered timber and masonry buildings” to all nearby buildings pursuant to FTA guidance. As shown in Table 8, vibration levels at these receptors would not exceed the vibration damage criterion of

0.20 inch/sec PPV during construction activities at the Project Site. As such, construction vibration impacts associated with building damage would be less than significant.

Impact NOI-3 For a project located within the vicinity of a private airstrip or an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the Project expose people residing or working in the Project area to excessive noise levels? (No Impact).

The Project Site is not in the vicinity of a private airstrip or airport land use plan. Likewise, the Project Site is not located within an airport land use plan or within two miles of a public airport or public use airport.

The closest airport is the San Gabriel Valley Airport which is located 7.4 miles southeast of the Project Site.

As such, the Project would not expose people residing or working in the project area to excessive airport - related noise levels. No impact would occur.

17 Los Angeles County Assessor Portal, LA County Parcels, 2026, available at:
https://portal.assessor.lacounty.gov/mapsearch , accessed March 9, 2026.

Impact Sciences, Inc. 28 600 North Rosemead Boulevard Project 1136.019 Noise & Vibration Technical Report – April 2026

5.0 REFERENCES
Federal Transit Administration. 2018. Transit Noise and Vibration Impact Assessment Manual. Available at: https://www.transit.dot.gov/sites/fta.dot.gov/files/docs/research-innovation/118131/transit- noise-and-vibration-impact-assessment-manual-fta-report-no-0123_0.pdf California Department of Transportation (Caltrans), Technical Noise Supplement to the Traffic Noise Analysis Protocol., 2013 Available at: https://dot.ca.gov/ -/media/dot- media/programs/environmental-analysis/documents/env/tens-sep2013-a11y.pdf City of Pasadena, Rosemead Boulevard Traffic Count Data, available at:
https://pasadena.public.ms2soft.com/tcds/tsearch.asp?mod=tcds , accessed March 4, 2026.

Federal Highway Administration, Highway Noise Fundamentals, (1980) 97.

Federal Highway Administration, Highway Noise Mitigation, (1980) 18 FHWA Noise Barrier Design Handbook, Table 4, July 14, 2011.

FHWA Noise Barrier Design Handbook, Terminology, July 14, 2011 Los Angeles County Assessor Portal, LA County Parcels, 2026, available at:
https://portal.assessor.lacounty.gov/mapsearch , accessed March 9, 2026 United States Department of Labor. OSH Act of 1970. https://www.osha.gov/laws - regs/oshact/completeoshact . Accessed March 6, 2026.

APPENDIX A
Noise & Vibration Data

APPENDIX B
Mechanical Equipment
DATE PLOTTED: 10/3/2024 10:10 PM BY: ROEL HECHANOVA LAST SAVED: RHECHANOVA FILE NAME: H:\PROJECTS\294 FSY ARCHITECTS\25-001 - 1ST & TOWNSEND APARTMENTS\01 - CAD\MECHANICAL\M2.01 MECHANICAL GROUND FLOOR PLAN.DWG ORIGINAL SIZE: ARCH FULL BLEED D (24.00 X 36.00 INCHES) PLOT SCALE: 1:1 PLOT STYLE: BREEN DESIGN GROUP.STB

DRAWN BYJTORAL

DESIGNED BYECRISTOBAL

CHECKED BYBLIM

APPROVED BYPBREEN

PROJECT NUMBER
PROJECT NAME:

LOS ANGELES, CA 90039
TEL : 323.255.4343
FAX : 323.255.4848
WWW.FSYARCHITECTS.COM
[email protected]
PROJECT ADDRESSES:

NOT FOR CONSTRUCTION
CLIENT NAME:CLIENT ADDRESS
Client Address
600 N. ROSEMEAD
AVE
600 N. ROSEMEAD

AVE, PASADENA CA
91107

ELYSIAN HOUSING
Scale
Date
Drawn by
Checked by
DRAWING TITLE:
2902 KNOX AVE, 2ND FLOOR
:
294-25-002
02/06/2026

SEE QA/QC STAMP

DESIGN DEVELOPMENT
COPYRIGHT ©2026 BREEN DESIGN GROUP

SEE QA/QC STAMP
WWW.BREENDESIGN.COM
3825 DEL AMO BOULEVARD
PH: 310 464 8404
TORRANCE, CA 90503
BA-M0.02
NONE
MECHANICAL SCHEDULES - BLDG. A

BUILDING A - SPLIT SYSTEM OUTDOOR UNIT SCHEDULE
MARKQTY.MAKEMODELTONSREFRIGERANT
TYPE

NOMINAL CAPACITYELECTRICAL DATAREFRIGERANT LINES

WEIGHT (LBS)VIBRATION

ISOLATORSFAN COIL UNITREMARKS
COOLING BTUH SEER2/EER2HEATING BTUHHSPF2V PH MCA MOCPTOTAL PIPE LENGTH (FT) VERTICAL LIFT (FT) CU-150LGKUSXB181A1.5R-3218,00017.5/12.420,0009.2208/230 116.0 25.0164.098.4136.0SPRING ISOLATORFC-1 PROVIDE VIBRATION SPRING ISOLATOR AND REFRIGERANT PORT LOCKING CAP. DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. REFRIGERANT PIPING SIZING AND OTHER CONSIDERATIONS SHALL BE PER MANUFACTURER'S RECOMMENDATION.

CU-21LGKUSXB241A2.0R-3223,00017.0/11.827,0009.5208/230 116.0 25.0164.098.4136.0SPRING ISOLATORFC-2 CU-35LGKUSXB301A2.5R-3229,00018.5/11.734,0009.4208/230 119.1 30.0164.098.4141.1SPRING ISOLATORFC-3 CU-41LGKUSXB121A1.0R-3212,00016.4/12.015,00010.5208/230 113.4 15.065.649.275.0SPRING ISOLATORFC-4 CU-51LGZRUMU48GSS04.0R-3248,00017.0/12.2054,00010.0208/230 131.0 40.0984.0164.257.0SPRING ISOLATORFC-5 CU-61LGKUSXB181A1.5R-3218,00020.5/13.020,0009.5208/230 116.0 25.0164.098.4136.0SPRING ISOLATORFC-6 CU-71LGKUSXB091A0.75R-329,00022.2/13.911,00010.0208/230 113.4 15.065.649.275.0SPRING ISOLATORFC-7

BUILDING A - SPLIT SYSTEM INDOOR UNIT SCHEDULE
MARKQTY.MAKEMODELTONSREFRIGERANT
TYPE

COOLING CAPACITYHEATING CAPACITY
BTUH

BLOWERELECTRICAL DATA

SERVICEWEIGHT (LBS)REMARKS
NOMINAL BTUH SENSIBLE BTUHCFMESP. (IN. WC)POWER V PH MCA MOCP FC-1 50LGKNUJB181A1.5R-3218,00013,50020,0005250.24-208/2301--STUDIO/1-BEDROOM61.5 PROVIDE CONDENSATE OVERFLOW SWITCH AND TITLE 24 COMPLIANT PROGRAMMABLE THERMOSTAT. OUTDOOR UNITS POWERS INDOOR UNIT. SEE PLUMBING DRAWINGS FOR PRIMARY CONDENSATE PIPING. PROVIDE 2" MERV 13 FILTERS. DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE REFRIGERANT LEAK DETECTION ACCESSORY WITH CONTROLS TO PROVIDE AIR CIRCULATION, IN ACCORDANCE WITH UL 60335-2-40.

FC-21LGKNUJB241A2.0R-3223,00017,25027,0007000.24-208/2301--2-BEDROOM64.2 FC-35LGKNUJB301A2.5R-3229,00021,75034,0008750.24-208/2301--COMMUNITY ROOM85.3 FC-41LGKNUJB121A1.0R-3212,0009,00015,0003500.24-208/2301--LEASING OFFICE61.7 FC-51LGZRNU483M3AA4.0R-3248,10036,07554,2001,4000.79-208/2301--MAIN LOBBY93.7 FC-61LGKNUDB181A1.5R-3218,00013,50020,000525--208/230 1--GYM30.9PROVIDE CONDENSATE OVERFLOW SWITCH AND TITLE 24 COMPLIANT PROGRAMMABLE THERMOSTAT. OUTDOOR UNITS POWERS INDOOR UNIT. SEE PLUMBING DRAWINGS FOR PRIMARY CONDENSATE PIPING. DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE REFRIGERANT LEAK DETECTION ACCESSORY WITH CONTROLS TO PROVIDE AIR CIRCULATION, IN ACCORDANCE WITH UL 60335-2-40. FC-71LGKNUDB091A0.75R-329,0006,75011,000265--208/230 1--SERVERY28.4 BUILDING A - VRF SYSTEM INDOOR UNIT SCHEDULE MARKQTY.MAKEMODELTONSREFRIGERANT
TYPE

COOLING CAPACITYHEATING CAPACITY
BTUH

BLOWERELECTRICAL DATA

SERVICEWEIGHT (LBS)REMARKS
NOMINAL BTUH SENSIBLE BTUHCFMESP. (IN. WC)POWER V PH FLA FC-84LGZRNU093TRAA0.75R-329,6007,20010,900265--208/230 10.25OFFICES29.1PROVIDE CONDENSATE OVERFLOW SWITCH AND TITLE 24 COMPLIANT PROGRAMMABLE THERMOSTAT. SEE PLUMBING DRAWINGS FOR PRIMARY CONDENSATE PIPING.

DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE REFRIGERANT LEAK DETECTION ACCESSORY WITH CONTROLS TO PROVIDE AIR CIRCULATION, IN ACCORDANCE WITH UL 60335-2-40. FC-92LGZRNU123TRAA1.0R-3212,3009,22513,600350--208/230 10.25CONFERENCE ROOM, BREAK ROOM29.1

BUILDING A - VRF SYSTEM OUTDOOR UNIT SCHEDULE
MARKQTY.MAKEMODELTONSREFRIGERANT
TYPE

NOMINAL CAPACITYELECTRICAL DATAREFRIGERANT LINES

WEIGHT (LBS)VIBRATION

ISOLATORSFAN COIL UNITREMARKS
COOLING BTUH SEER2/EER2HEATING BTUHHSPF2V PH MCA MOCPTOTAL PIPE LENGTH (FT) VERTICAL LIFT (FT) CU-81LGZRUM060GSS05.0R-3260,00023.0/13.067,00010.0208/230 132.9 40.0984.0164.0267.0SPRING ISOLATORFC-8, FC-9PROVIDE VIBRATION SPRING ISOLATOR AND REFRIGERANT PORT LOCKING CAP. DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. REFRIGERANT PIPING SIZING AND OTHER CONSIDERATIONS SHALL BE PER MANUFACTURER'S RECOMMENDATION.

BUILDING A - FAN SCHEDULE
MARKQTY.MAKEMODELFAN TYPE TOTAL CFMESP (IN)MAX. RPM

MOTOR DATA

SERVICEWEIGHT (LBS)REMARKS

POWERAMPSVPH
EF-151PANASONICFV-0511VKS2DIRECT DRIVE30-1100.19209.9 W0.11201RESIDENTIAL BATHROOMS11.9ENERGY STAR COMPLIANT FAN. PROVIDE WITH BACKDRAFT DAMPER. PROVIDE TWO-SPEED FAN WITH TIMER AND HUMIDITY SENSOR. FAN SHALL BE CAPABLE OF HIGH/LOW SETTING. FAN SHALL RUN CONTINUOUSLY AT LOW SETTING OF 30 CFM AND SWITCH TO HIGH SPEED TO MAINTAIN RELATIVE HUMIDITY AT 60% OR WHEN MANUALLY SWITCHED ON. PROVIDE DEDICATED FAN SWITCH.

EF-251BROANBCSEK130DIRECT DRIVE100-2400.11,65678.0 W0.651201RESIDENTIAL KITCHEN17.4 30" EXHAUST HOOD WITH HVI CERTIFIED FAN. PROVIDE BACKDRAFT DAMPER.

EF-32PANASONICFV-0511VQ1DIRECT DRIVE800.18215.9 W0.111201NON-RESIDENTIAL RESTROOMS11.0ENERGY STAR COMPLIANT FAN. DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE WITH BACKDRAFT DAMPER. INTERLOCK WITH LIGHTSWITCH.

EF-42AIRKINGF130DDIRECT DRIVE1300.2-26 W0.51151PART 1 - LEVEL 2 & 3 CORRIDORS-DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. FAN TO RUN CONTINUOUSLY.

EF-52AIRKINGF130DDIRECT DRIVE500.2-26 W0.511512/F & 3/F LAUNDRY-DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. FAN TO RUN CONTINUOUSLY. INTERLOCK WITH SF-4.

EF-62GREENHECKSQ-90DIRECT DRIVE3000.311,3001/25 HP-1151PART 2 - LEVEL 2 & 3 CORRIDORS35.0DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. FAN TO RUN CONTINUOUSLY.

EF-71GREENHECKAX-63-190-0625DIRECT DRIVE6,8001.531,7705 HP16.72083GARAGE259FAN TO RUN CONTINUOUSLY. INTERLOCK WITH CO SENSORS AND CONTROL SYSTEM. DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE HARDWARE CLOTH AT INLET.

EF-81GREENHECKG-070-VGDIRECT DRIVE1200.251,2261/6 HP1.520812/F & 3/F TRASH ROOM36.0DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. FAN TO RUN CONTINUOUSLY. INTERLOCK WITH SF-4.

SF-12AIRKINGF130DDIRECT DRIVE1300.2-26 W0.51151PART 1 - LEVEL 2 & 3 CORRIDORS-DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE WITH BACKDRAFT DAMPER. INTERLOCK WITH LIGHTSWITCH.

SF-21GREENHECKUSF-06DIRECT DRIVE6000.51,7151/4 HP-1151PART 2 - LEVEL 2 & 3 CORRIDORS-DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE WITH BACKDRAFT DAMPER. INTERLOCK WITH LIGHTSWITCH.

SF-31GREENHECKSQ-120-VGDIRECT DRIVE6500.561,0801/2 HP3.82081MAIN LOBBY 200A110.0DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE WITH BACKDRAFT DAMPER. INTERLOCK WITH LIGHTSWITCH.

SF-41GREENHECKUSF-10DIRECT DRIVE1200.51,1191 HP-20632/F & 3/F TRASH ROOM156.0DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. FAN TO RUN CONTINUOUSLY. INTERLOCK WITH EF-8.

OF-151AIRKINGF130DDIRECT DRIVE40-1300.2-26 W0.51151RESIDENTIAL UNITS-DISCONNECT SWITCH BY ELECTRICAL. PROVIDE BACKDRAFT DAMPER. PROVIDE 2" MERV 13 FILTER. FAN SHALL RUN CONTINUOUSLY.

OF-21GREENHECKSQ-7-M1-VGDIRECT DRIVE8301.233,4511/2 HP6.61151SERVERY, GYM, LEASING, OFFICES, COMMUNITY, CONFERENCE & BREAK ROOMSDISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE WITH BACKDRAFT DAMPER. FAN TO RUN CONTINUOUSLY DURING OCCUPIED HOURS.

JF-1, JF-2 & JF-32SYSTEM AIRIV50-ECDIRECT DRIVE3,517N/A1,4001.67 KW11.32081GARAGE162.0DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. FAN TO RUN CONTINUOUSLY.

BUILDING A - AIR DISTRIBUTION SCHEDULE
TYPEQTY.MAKEMODEL CFM RANGE USETYPESIZE (IN)MAX PD
(IN)MAX NCREMARKS
S-1104PRICE6200-350SALOUVERED SUPPLY GRILLE12"X12"0.024 15 NECK SIZE PER PLAN. PROVIDE O.B.D. ALL AIR RETURNS TO
SUPPORT 2" FILTERS
S-25PRICESPD0-225SALOUVERED SUPPLY DIFFUSER24"X24"0.057 15 S-320PRICE6200-350SALOUVERED SUPPLY GRILLE12"X10" 0.016 15 S-42PRICE6200-60SALOUVERED SUPPLY GRILLE8"X8" 0.006 15
R-151PRICE630FF0-700RALOUVERED RETURN GRILLE24"X12"0.044 20 R-26PRICE630FF0-875RALOUVERED RETURN DIFFUSER 24"X24"0.05017 R-32PRICE630FF0-875RALOUVERED RETURN GRILLE28"X14" 0.044 20 M-1 2PRICE5200-130MALOUVERED SUPPLY DIFFUSER10"X10" 0.014 15 M-22PRICE5200-300MALOUVERED SUPPLY GRILLE14"X14"0.014 15 M-31PRICE5200-650MALOUVERED SUPPLY GRILLE14"X14"0.01917 E-16PRICE800-130EAEGG CRATE GRILLE8"X8" 0.013 15
E-22PRICE800-300EAEGG CRATE GRILLE14"X14"0.013 15
OA-151PRICE6200-50OALOUVERED SUPPLY DIFFUSER8"X8" 0.014 15 02/17/2026
DATE PLOTTED:10/3/2024 10:10 PMBY:ROEL HECHANOVALAST SAVED:RHECHANOVAFILE NAME:H:\PROJECTS\294 FSY ARCHITECTS\25-001 - 1ST & TOWNSEND APARTMENTS\01 - CAD\MECHANICAL\M2.01 MECHANICAL GROUND FLOOR PLAN.DWGORIGINAL SIZE:ARCH FULL BLEED D (24.00 X 36.00 INCHES)PLOT SCALE:1:1PLOT STYLE:BREEN DESIGN GROUP.STB

DRAWN BYLCARMELOTESDESIGNED BYECRISTOBALCHECKED BYBLIMAPPROVED BYPBREEN PROJECT NUMBERPROJECT NAME:

LOS ANGELES, CA 90039TEL : 323.255.4343FAX : [email protected] PROJECT ADDRESSES:

NOT FOR CONSTRUCTION
CLIENT NAME:CLIENT ADDRESSClient Address
600 N. ROSEMEADAVE600 N. ROSEMEADAVE, PASADENA CA91107ELYSIAN HOUSING ScaleDateDrawn byChecked byDRAWING TITLE:
2902 KNOX AVE, 2ND FLOOR
:294-25-002
02/06/2026SEE QA/QC STAMPDESIGN DEVELOPMENT
COPYRIGHT ©2026 BREEN DESIGN GROUPSEE QA/QC STAMP
WWW.BREENDESIGN.COM3825 DEL AMO BOULEVARDPH: 310 464 8404TORRANCE, CA 90503 BB-M0.02NONE
MECHANICAL SCHEDULES - BLDG. B
BUILDING B - SPLIT SYSTEM OUTDOOR UNIT SCHEDULEMARKQTY.MAKEMODELTONSREFRIGERANTTYPENOMINAL CAPACITYELECTRICAL DATAREFRIGERANT LINESWEIGHT (LBS)VIBRATIONISOLATORSFAN COIL UNITREMARKS COOLING BTUHSEER2/EER2HEATING BTUHHSPF2VPHMCAMOCPTOTAL PIPE LENGTH (FT)VERTICAL LIFT (FT)CU-115LGKUSXB181A1.5R-3218,00017.5/12.420,0009.2208/230116.025.0164.098.4136.0SPRING ISOLATORFC-1PROVIDE VIBRATION SPRING ISOLATOR AND REFRIGERANT PORT LOCKING CAP. DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. REFRIGERANT PIPING SIZING ANDOTHER CONSIDERATIONS SHALL BE PER MANUFACTURER'S RECOMMENDATION.CU-267LGKUSXB241A2.0R-3223,00017.0/11.827,0009.5208/230116.025.0164.098.4136.0SPRING ISOLATORFC-2 CU-31LGKUSXB481A4.0R-3245,50018.0/11.750,0009.4208/230132.040.0246.098.4190.2SPRING ISOLATORFC-3 CU-43LGKUSXB241A2.0R-3223,00017.0/11.8--208/230116.025.0164.098.4136.0SPRING ISOLATORFC-4 BUILDING B - SPLIT SYSTEM INDOOR UNIT SCHEDULEMARKQTY.MAKEMODELTONSREFRIGERANTTYPECOOLING CAPACITYHEATING CAPACITYBTUHBLOWERELECTRICAL DATASERVICEWEIGHT (LBS)REMARKS NOMINAL BTUHSENSIBLE BTUHCFMESP. (IN. WC)POWERVPHMCAMOCP FC-115LGKNUJB181A1.5R-3218,00013,50020,0005250.24-208/2301--STUDIO/1-BEDROOM61.5PROVIDE CONDENSATE OVERFLOW SWITCH AND TITLE 24 COMPLIANT PROGRAMMABLE THERMOSTAT. OUTDOOR UNITS POWERS INDOOR UNIT. SEE PLUMBINGDRAWINGS FOR PRIMARY CONDENSATE PIPING. PROVIDE 2" MERV 13 FILTERS. DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE REFRIGERANT LEAKDETECTION ACCESSORY WITH CONTROLS TO PROVIDE AIR CIRCULATION, IN ACCORDANCE WITH UL 60335-2-40. FOR FC-4, SET THERMOSTAT TO COOLING MODEONLY. FC-267LGKNUJB241A2.0R-3223,00017,25027,0007000.24-208/2301--2-BEDROOM/3-BEDROOM64.2 FC-31LGKNSLB481A4.0R-3245,50034,12550,0001,4000.40-208/2301--COMMUNITY ROOM146.0 FC-43LGKNUJB241A2.0R-3223,00017,250-7000.24-208/2301--MPOE, E.C.R., ELECTRICAL ROOM64.2 BUILDING B - VRF SYSTEM INDOOR UNIT SCHEDULEMARKQTY.MAKEMODELTONSREFRIGERANTTYPECOOLING CAPACITYHEATING CAPACITYBTUHBLOWERELECTRICAL DATASERVICEWEIGHT (LBS)REMARKS NOMINAL BTUHSENSIBLE BTUHCFMESP. (IN. WC)POWERVPHFLA FC-51LGZRNU093TRAA0.75R-329,6007,20010,900265--208/23010.25MAIL ROOM29.1PROVIDE CONDENSATE OVERFLOW SWITCH AND TITLE 24 COMPLIANT PROGRAMMABLE THERMOSTAT. SEE PLUMBING DRAWINGS FOR PRIMARY CONDENSATE PIPING.DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE REFRIGERANT LEAK DETECTION ACCESSORY WITH CONTROLS TO PROVIDE AIR CIRCULATION, IN ACCORDANCEWITH UL 60335-2-40.FC-61LGZRNU123TRAA1.0R-3212,3009,22513,600350--208/23010.25LEASING OFFICE29.1 BUILDING B - VRF SYSTEM OUTDOOR UNIT SCHEDULEMARKQTY.MAKEMODELTONSREFRIGERANTTYPENOMINAL CAPACITYELECTRICAL DATAREFRIGERANT LINESWEIGHT (LBS)VIBRATIONISOLATORSFAN COIL UNITREMARKS COOLING BTUHSEER2/EER2HEATING BTUHHSPF2VPHMCAMOCPTOTAL PIPE LENGTH (FT)VERTICAL LIFT (FT)CU-51LGZRUN024GSS02.0R-3224,00020.05/14.8027,00010.20208/230126.430.0984.0164.0148.0SPRING ISOLATORFC-4, FC-5PROVIDE VIBRATION SPRING ISOLATOR AND REFRIGERANT PORT LOCKING CAP. DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. REFRIGERANT PIPING SIZING ANDOTHER CONSIDERATIONS SHALL BE PER MANUFACTURER'S RECOMMENDATION.BUILDING B - FAN SCHEDULEMARKQTY.MAKEMODELFAN TYPETOTAL CFMESP (IN)MAX. RPMMOTOR DATASERVICEWEIGHT (LBS)REMARKS POWERAMPSVPH EF-1116PANASONICFV-0511VKS2DIRECT DRIVE30-1100.19209.9 W0.11201RESIDENTIAL BATHROOMS11.9ENERGY STAR COMPLIANT FAN. PROVIDE WITH BACKDRAFT DAMPER. PROVIDE TWO-SPEED FAN WITH TIMER AND HUMIDITY SENSOR. FAN SHALL BE CAPABLE OF HIGH/LOW SETTING. FAN SHALL RUNCONTINUOUSLY AT LOW SETTING OF 40 CFM (FOR 1-BED), 60 CFM (FOR 2-BED), & 80 CFM (FOR 3-BED) AND SWITCH TO HIGH SPEED TO MAINTAIN RELATIVE HUMIDITY AT 60% OR WHEN MANUALLYSWITCHED ON. PROVIDE DEDICATED FAN SWITCH.EF-283BROANBCSEK130DIRECT DRIVE100-2400.11,65678.0 W0.651201RESIDENTIAL KITCHEN17.430" EXHAUST HOOD WITH HVI CERTIFIED FAN. PROVIDE BACKDRAFT DAMPER.EF-35GREENHECKSP-B80DIRECT DRIVE600.2690018.0 W0.1611511/F - 5/F TRASH ROOMS9.0DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE WITH BACKDRAFT DAMPER. FAN TO RUN CONTINUOUSLY.EF-41GREENHECKSP-A250DIRECT DRIVE2500.251,00063.0 W0.561151BASEMENT TRASH ROOM24.0DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE WITH BACKDRAFT DAMPER. FAN TO RUN CONTINUOUSLY.EF-51PANASONICFV-0511VQ1DIRECT DRIVE800.18215.9 W0.111201NON-RESIDENTIAL RESTROOMS11.0ENERGY STAR COMPLIANT FAN. DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE WITH BACKDRAFT DAMPER. INTERLOCK WITH LIGHTSWITCH.EF-61GREENHECKSP-A125DIRECT DRIVE1100.251,10017 W0.181151LAUNDRY ROOM17.0DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. INTERLOCK WITH LIGHTSWITCH.SF-11GREENHECKSQ-90-VGDIRECT DRIVE2500.251,1151/6 HP2.81151BASEMENT TRASH ROOM34.0DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE WITH BACKDRAFT DAMPER. FAN TO RUN CONTINUOUSLY.OF-182AIRKINGF130DDIRECT DRIVE40-1300.2-26 W0.51151RESIDENTIAL UNITS-DISCONNECT SWITCH BY ELECTRICAL. PROVIDE BACKDRAFT DAMPER. PROVIDE 2" MERV 13 FILTER. FAN SHALL RUN CONTINUOUSLY.OF-21AIRKINGF130DDIRECT DRIVE800.2-26 W0.51151LEASING OFFICE, MAIL ROOM-DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. PROVIDE WITH BACKDRAFT DAMPER. FAN TO RUN CONTINUOUSLY DURING OCCUPIED HOURS.JF-1JF-22ZOO FANSJVEC-SPDIRECT DRIVE3,475N/A1,8003 HP-4803GARAGE210.0DISCONNECT SWITCH BY ELECTRICAL CONTRACTOR. FAN TO RUN CONTINUOUSLY.BUILDING B - AIR DISTRIBUTION SCHEDULETYPEQTY.MAKEMODELCFM RANGEUSETYPESIZE (IN)MAX PD(IN)MAX NCREMARKS S-1298PRICE6200-350SALOUVERED SUPPLY GRILLE12"X12"0.02415NECK SIZE PER PLAN. PROVIDE O.B.D. ALL AIR RETURNS TOSUPPORT 2" FILTERSS-25PRICERCD0-280SAROUND CONE DIFFUSER10"Ø0.04415 R-182PRICE630FF0-700RALOUVERED RETURN GRILLE24"X12"0.04420 R-21PRICE630FF0-1,400RALOUVERED RETURN GRILLE28"X20"0.04420 M-11PRICE5200-100MALOUVERED SUPPLY DIFFUSER8"X8"0.01415 OA-182PRICE6200-50OALOUVERED SUPPLY DIFFUSER8"X8"0.01415 02/17/2026
78 9
B1C1D1 A1GG
DATE PLOTTED:10/3/2024 10:10 PMBY:ROEL HECHANOVALAST SAVED:RHECHANOVAFILE NAME:H:\PROJECTS\294 FSY ARCHITECTS\25-001 - 1ST & TOWNSEND APARTMENTS\01 - CAD\MECHANICAL\M2.01 MECHANICAL GROUND FLOOR PLAN.DWGORIGINAL SIZE:ARCH FULL BLEED D (24.00 X 36.00 INCHES)PLOT SCALE:1:1PLOT STYLE:BREEN DESIGN GROUP.STB N

DRAWN BYJTORALDESIGNED BYECRISTOBALCHECKED BYBLIMAPPROVED BYPBREEN PROJECT NUMBERPROJECT NAME:

LOS ANGELES, CA 90039TEL : 323.255.4343FAX : [email protected] PROJECT ADDRESSES:

NOT FOR CONSTRUCTION
CLIENT NAME:CLIENT ADDRESSClient Address
600 N. ROSEMEADAVE600 N. ROSEMEADAVE, PASADENA CA91107ELYSIAN HOUSING ScaleDateDrawn byChecked byDRAWING TITLE:
2902 KNOX AVE, 2ND FLOOR
:294-25-002
02/06/2026SEE QA/QC STAMPDESIGN DEVELOPMENT

KEY PLAN
COPYRIGHT ©2026 BREEN DESIGN GROUPSEE QA/QC STAMP
WWW.BREENDESIGN.COM3825 DEL AMO BOULEVARDPH: 310 464 8404TORRANCE, CA 90503 BA-M2.411/8" = 1'-0"
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DRAWN BYJTORALDESIGNED BYECRISTOBALCHECKED BYBLIMAPPROVED BYPBREEN PROJECT NUMBERPROJECT NAME:

LOS ANGELES, CA 90039TEL : 323.255.4343FAX : [email protected] PROJECT ADDRESSES:

NOT FOR CONSTRUCTION
CLIENT NAME:CLIENT ADDRESSClient Address
600 N. ROSEMEADAVE600 N. ROSEMEADAVE, PASADENA CA91107ELYSIAN HOUSING ScaleDateDrawn byChecked byDRAWING TITLE:
2902 KNOX AVE, 2ND FLOOR
:294-25-002
02/06/2026SEE QA/QC STAMPDESIGN DEVELOPMENT

KEY PLAN
COPYRIGHT ©2026 BREEN DESIGN GROUPSEE QA/QC STAMP
WWW.BREENDESIGN.COM3825 DEL AMO BOULEVARDPH: 310 464 8404TORRANCE, CA 90503 BA-M2.421/8" = 1'-0"
MECHANICAL BLDG. A (PART 2) - ROOFPLAN
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DRAWN BYJTORALDESIGNED BYECRISTOBALCHECKED BYBLIMAPPROVED BYPBREEN PROJECT NUMBERPROJECT NAME:

LOS ANGELES, CA 90039TEL : 323.255.4343FAX : [email protected] PROJECT ADDRESSES:

NOT FOR CONSTRUCTION
CLIENT NAME:CLIENT ADDRESSClient Address
600 N. ROSEMEADAVE600 N. ROSEMEADAVE, PASADENA CA91107ELYSIAN HOUSING ScaleDateDrawn byChecked byDRAWING TITLE:
2902 KNOX AVE, 2ND FLOOR
:294-25-002
02/06/2026SEE QA/QC STAMPDESIGN DEVELOPMENT

KEY PLAN
COPYRIGHT ©2026 BREEN DESIGN GROUPSEE QA/QC STAMP
WWW.BREENDESIGN.COM3825 DEL AMO BOULEVARDPH: 310 464 8404TORRANCE, CA 90503 BB-M2.51MECHANICAL BLDG. B - ROOF PLANN1/8" = 1'-0"N
REFERENCE NOTESCONDENSING UNIT ON EQUIPMENT PAD.1GENERAL NOTESALL CONDENSERS MUST BE PROPERLY LABELEDAFTER INSTALLATION TO SHOW WHICH SPACE IT ISSERVING.1 CU21(9 TYP.)
CU51
CU11(7 TYP.)
CU41(3 TYP.)CU21(20 TYP.)
CU11(8 TYP.)
CU21(12 TYP.)CU31 CU21(26 TYP.)
02/17/2026

Prepared for:

City of Pasadena
Planning and Development Department
175 North Garfield Avenue
Pasadena, CA 91101
Prepared by:

Impact Sciences, Inc.
811 W. 7th Street, Suite 200
Los Angeles, CA 90017
Contact: Brett Pomeroy, Associate Principal
600 North Rosemead Boulevard Project
Air Quality Technical Report
April 2026
Impact Sciences, Inc. i 600 North Rosemead Boulevard Project 1136.019 Air Quality Technical Report – April 2026

TABLE OF CONTENTS
Section Page

1.0 Introduction .................................................................................................................................................. 1

1.1 Project Location .............................................................................................................................. 1

1.2 Existing Conditions ........................................................................................................................ 1

1.3 Project Characteristics ................................................................................................................... 3

1.4 Project Construction Sequencing ................................................................................................. 5

2.0 Environmental Setting ................................................................................................................................. 6

2.1 Air Quality Setting ......................................................................................................................... 6

2.2 Ambient Air Quality ...................................................................................................................... 8

3.0 Regulatory Framework .............................................................................................................................. 13

3.1 Federal ........................................................................................................................................... 13

3.2 State ................................................................................................................................................ 14

3.3 Regional ......................................................................................................................................... 18

4.0 Air Quality Analysis .................................................................................................................................. 22

4.1 Thresholds and Methodology .................................................................................................... 22

4.2 Project Impacts ............................................................................................................................. 27

5.0 References .................................................................................................................................................... 37

Appendix
A Air Quality Data

LIST OF FIGURES
Figure Page
1 Aerial Photograph of the Project Site ......................................................................................................... 2 2 Project Site Plan ............................................................................................................................................ 4 3 Source Receptor Area Location Map ......................................................................................................... 7

LIST OF TABLES
Table Page
1 Project Summary .......................................................................................................................................... 3 2 Criteria Pollutants Summary of Common Sources and Effects ............................................................. 8 3 Air Monitoring Station Ambient Pollutant Concentrations ................................................................... 9 4 Attainment Status of the South Coast Air Basin .................................................................................... 10 5 National Ambient Air Quality Standards ............................................................................................... 14 6 California Ambient Air Quality Standards ............................................................................................. 15 7 South Coast AQMD Air Quality Significance Thresholds .................................................................... 23

Impact Sciences, Inc. ii 600 North Rosemead Boulevard Project 1136.019 Air Quality Technical Report – April 2026
LIST OF TABLES (Continued)
Table Page
8 Construction-Related Criteria Pollutant and Precursor Emissions – Maximum Pounds per Day ............................................................................................................................................................... 30 9 Long-Term Operational Emissions – Maximum Pounds per Day ...................................................... 31 10 Localized Significance of Construction Emissions – Maximum Pounds per Day ............................. 33 11 Localized Significance of On-Site Operational Emissions – Maximum Pounds per Day ................ 34 Impact Sciences, Inc. 1 600 North Rosemead Boulevard Project 1136.019 Air Quality Technical Report – April 2026

1.0 INTRODUCTION
This Air Quality Technical Report evaluates air quality impacts associated with the proposed 600 North Rosemead Boulevard Project (Project) in the City of Pasadena (City). This report has been prepared by Impact Sciences, Inc., to support the City of Pasadena's (lead agency's) environmental review of the Project being conducted pursuant to the California Environmental Quality Act (CEQA). This analysis considers both the temporary air quality impacts from Project construction and long -term impacts associated with operation of the Project.

1.1 PROJECT LOCATION
The Project Site is located at 600 N. Rosemead Boulevard (APN: 5757-006-060) and is currently developed with a two-story office building and two -story parking structure. Surrounding uses include multi- family residential buildings at the adjacent property to the south, commercial uses to the north and west (acro ss N. Rosemead Boulevard), and low-density residential uses to the east of the Project Site. See Figure 1, Aerial Photograph of the Project Site, which illustrates the location of the Project Site.

1.2 EXISTING CONDITIONS
The Project Site is within the East Pasadena Specific Plan area (EPSP). The City’s General Plan designates the Project Site as ESPS Subarea 2 Commercial Office and is zoned EPSP-D2-CO-D-2. The EPSP-D2-CO-D- 2 zone permits multi- family residential land uses subject to compliance with all development standards.

Pursuant to Pasadena Municipal Code § 17.32.050, multi -family residential uses are permitted in this district, and the East Pasadena Specific Plan requires that such development comply with applicable multi- family (RM) development standards. The Project applies high density residential (RM -48) zone standards which allow for 0 -48 dwelling units per acre, characterized by higher density multi- family complexes in neighborhoods with densities of up to 48 dwelling units per acre and two to three st ory buildings.1

1 City of Pasadena, Land Use Element, amended January 2016 and May 2022. Available online at:
https://www.cityofpasadena.net/planning/wp-content/uploads/sites/30/Land-Use-Element-2022-05-

25.pdf?v=1752250820103, accessed January 10, 2026.

Aerial Photograph of the Project Site
FIGURE 1
1136.019•01/26
SOURCE: Esri, 2026

1.0 Introduction
Impact Sciences, Inc. 3 600 North Rosemead Boulevard Project 1136.019 Air Quality Technical Report – April 2026

1.3 PROJECT CHARACTERISTICS
The Project would demolish the existing two-story parking structure, convert and expand the existing two- story, 42,518-square-foot office building into a 60,650 sf, 51 -unit affordable housing building (Building A) , and construct a new five-story, 76,089-square-foot building (Building B) with 82 affordable units for a total of 133 units. Each building would include one level of at grade parking. The Project would provide a total of 55 parking spaces and would include 22 on- site bicycle parking spaces. The Project would have an approximate floor area ratio (“FAR”) of 1.29:1 and a maximum height of 71’. The Project would also provide approximately 15,000 sf of open space area within the Project Site and adjacent street frontages (see Figure 2, Project Site Plan). Table 1, Project Summary, below, summarizes the Project’s development envelope.

Table 1
Project Summary

Maximum Allowable/Required Project
Units 103 units + 103 bonus density units (Per PMC
Section 17.22.060 + AB 1287)
133 units
Residential Building Square
Footage
121,030 sf (Per PMC Section 17.22.060) 118,607 sf
Parking Square Footage None 18,132 sf
FAR 1.99:1 (Per PMC Section 17.22.060 + AB 1287
density bonus)

1.29:1
Height 71 feet (with the affordable housing density
bonus per PMC Chapter 17.22 & Chapter 17.42
Section 17.43.040)
71’
Vehicle Parking None (per AB 2097) 55 spaces
Bicycle Parking 22 bicycle parking spaces (per PMC Chapter

17.46, Section 17.46.320)
22 spaces
Open Space 14,850 sf (per PMC Chapter 17.40 + PMC 3.23.010 open space reduction)
15,000 sf

Sources: Project application materials, Pasadena Municipal Code (PMC) 2026, and Impact Sciences 2026.

Access and Parking
As described above, the Project would provide a one level parking garage in each building for a 55 total parking spaces. Vehicular ingress/egress to the Project’s parking garage s would be provided via one driveway for Building A and one driveway for Building B along N. Rosemead Boulevard. To encourage and facilitate the use of public transportation and bicycle use by residents and visitors, the Project would also include 22 bicycle parking spaces.


























 




 
















 





 


 



 



 










 






  


     
 


 
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Project Site Plan
FIGURE 2
1136.019•01/26
SOURCE: Fry Architects, October 2024

1.0 Introduction
Impact Sciences, Inc. 5 600 North Rosemead Boulevard Project 1136.019 Air Quality Technical Report – April 2026

1.4 PROJECT CONSTRUCTION SEQUENCING
For the purpose of analyzing impacts associated with construction activities, this analysis assumes a construction schedule of approximately 27 months beginning in 2026. This analysis assumes the Project will be fully operational in 2028. It should be noted that the construction assumptions identified herein are conceptual and are intended to identify worst-case daily impacts. If the Project is built out more slowly and at later dates than those assumed herein, the daily construction intensity would be reduced and associated daily impacts would be generally reduced. Construction activities associated with the Project would involve: (1) demolition, (2) site preparation/grading/foundation preparation, and (3) building construction (including painting and paving).

Demolition and removal of existing debris would occur for approximately two months. This phase would include the demolition of the two -story parking structure on site. Approximately 3,153 cubic yards of building demolition would be required.
2 Site preparation, grading/excavation, and foundation preparation would occur for approximately one month and up to 500 cubic yards (cy) of soil may be exported.

Building construction would occur for approximately 12 months and would include the construction of the proposed structures, connection of utilities, and landscaping the Project Site.

Painting would occur for approximately 12 months with paving occurring concurrently during the final month.

The following maximum daily equipment by phase will be assumed:
• Demolition: 1 concrete/industrial saw, 1 excavator, 1 skid steer loader, 1 tractor/loader/backhoe • Site preparation/grading/foundation preparation: 1 excavator, 1 roller, 1 tractor/loader/backhoe • Building construction: 1 crane, 1 forklift
• Paving and painting : 1 cement and mortar mixer, 1 paver, 1 paving equipment, 2 rollers , 1 tractor/loader/backhoe, 1 air compressor

2 Debris volume estimated using the FEMA 329 General Building Formula (LxWxDx0.33/27), which accounts for air space reduction during demolition. The 3,153 cubic yards of demolition debris would generate approximately 1,577 tons, based on the standard Cal Recycle conversion factor of 0.5 tons per cubic yard for mixed construction and demolition debris.

Impact Sciences, Inc. 6 600 North Rosemead Boulevard Project 1136.019 Air Quality Technical Report – April 2026

2.0 ENVIRONMENTAL SETTING

2.1 AIR QUALITY SETTING
South Coast Air Basin
The Project Site is located within the Los Angeles County portion of the South Coast Air Basin (Basin). The Basin includes all of Orange County and the non- desert portions of Los Angeles, San Bernardino, and Riverside Counties. The regional climate within the Basin is considered semi- arid and is characterized by warm summers, mild winters, infrequent seasonal rainfall, moderate daytime onshore breezes, and moderate humidity. The air quality within the Basin is primarily influenced by meteorological conditio ns and a wide range of emissions sources, such as dense population centers, heavy vehicular traffic, and industry. The South Coast Air Quality Management District (SCAQMD) divides the Basin into source receptor areas (SRAs) in which monitoring stations ope rate to monitor the various concentrations of air pollutants in the region. As shown in Figure 3, Source Receptor Area Location Map , the Project Site is located within SRA 8, which covers the West San Gabriel Valley area.

Air Pollutants of Concern
Criteria air pollutants are defined as pollutants for which the federal and state governments have established ambient air quality standards for outdoor concentrations. The federal and state standards have been set at levels above which concentrations coul d be harmful to human health and welfare. These standards are designed to protect the most sensitive persons such as children, pregnant women, and the elderly, from illness or discomfort. Criteria air pollutants include ozone (O 3), nitrogen dioxide (NO 2),
carbon monoxide (CO), sulfur dioxide (SO 2), particulate matter 2.5 microns or less in diameter (PM2.5), particulate matter ten microns or less in diameter (PM10), and lead (Pb). Note that reactive organic gases (ROGs), which are also known as reactive organic compounds (ROCs) or volatile organic compounds (VOCs), and nitrogen oxides (NOx) are not classified as criteria pollutants. However, ROGs and NOx are widely emitted from land development projects and participate in photochemical reactions in the atmosphere to form O
3; therefore, NOx and ROGs are relevant to the Proposed Project and are of concern in the Basin. As such, they are listed below along with the criteria pollutants. Sources and health effects commonly associated with criteria pollutants are summarized in Table 2, Criteria Pollutants Summary of Common Sources and Effects.

Project Site
Source Receptor Area Location Map
FIGURE 3
1136.019•03/26
SOURCE: SCAQMD, 2026

2.0 Environmental Setting
Impact Sciences, Inc. 8 600 North Rosemead Boulevard Project 1136.019 Air Quality Technical Report – April 2026

Table 2
Criteria Pollutants Summary of Common Sources and Effects

Pollutant Major Man-Made Sources Human Health & Welfare Effects Carbon Monoxide (CO)
An odorless, colorless gas formed when
carbon in fuels is not burned completely;
a component of motor vehicle exhaust.

Reduces the ability of blood to deliver
oxygen to vital tissues, affecting the
cardiovascular and nervous system.

Impairs vision, causes dizziness, and can
lead to unconsciousness or death.

Nitrogen Dioxide (NO2)
A reddish-brown gas formed during fuel
combustion for motor vehicles and
industrial sources. Sources include moto
vehicles, electric utilities, and other
sources that burn fuel.

Respiratory irritant; aggravates lung and
heart problems. Precursor to ozone and
acid rain. Contributes to global warming
and nutrient overloading which
deteriorates water quality. Causes brown
discoloration of the atmosphere.

Ozone (O3)
Formed by a chemical reaction between
volatile organic compounds (VOC) and
nitrous oxides (NOx) in the presence of
sunlight. VOCs are also commonly
referred to as reactive organic gases
(ROGs). Common sources of these
precursor pollutants include motor
vehicle exhaust, industrial emissions,
gasoline storage and transport, solvents,
paints, and landfills.

Irritates and causes inflammation of the
mucous membranes and lung airways;
causes wheezing, coughing, and pain
when inhaling deeply; decreases lung
capacity; aggravates lung and heart
problems. Damages plants; reduces crop
yield. Damages rubber, some textiles, and
dyes.

Particulate Matter (PM10 & PM2.5)
Produced by power plants, steel mills,
chemical plants, unpaved roads and
parking lots, wood-burning stoves and
fireplaces, automobiles, and others.

Increased respiratory symptoms, such as
irritation of the airways, coughing or
difficulty breathing; aggravated asthma;
development of chronic bronchitis;
irregular heartbeat; nonfatal heart attacks;
and premature death in people with heart
or lung disease. Impairs visibility (haze).

Sulfur Dioxide (SO2)
A colorless, nonflammable gas formed
when fuel containing sulfur is burned;
when gasoline is extracted from ore.

Examples are petroleum refineries,
cement manufacturing, metal processing
facilities, locomotives, and ships.

Respiratory irritant; aggravates lung and
heart problems. In the presence of
moisture and oxygen, sulfur dioxide
converts to sulfuric acid which can
damage marble, iron, and steel. Damages
crops and natural vegetation. Impairs
visibility. Precursor to acid rain.

Source: California Air Resources Board, Common Air Pollutants, available online at: https://ww2.arb.ca.gov/resources/common-air-pollutants, accessed March 3, 2026.

2.2 AMBIENT AIR QUALITY
Criteria Air Pollutant Monitoring Data
Ambient air quality in Pasadena can be inferred from ambient air quality measurements conducted at nearby air quality monitoring stations. Existing levels of ambient air quality and historical trends and projections are documented by measurements made by the SCAQMD, the air pollution regulatory agency

2.0 Environmental Setting
Impact Sciences, Inc. 9 600 North Rosemead Boulevard Project 1136.019 Air Quality Technical Report – April 2026
in the Basin. The SCAQMD maintains air quality monitoring stations which process ambient air quality measurements throughout the Basin.

The purpose of the monitoring station is to measure ambient concentrations of pollutants and determine whether ambient air quality meets the National Ambient Air Quality Standards (NAAQS) and the California Ambient Air Quality Standards (CAAQS). Ozone and particulate matter (PM10 and PM2.5) are pollutants of particular concern in the Basin. The monitoring station located closest to the Project Site and most representative of air quality is SCAQMD Station No. 088 located in Pasadena. Ambient emission concentrations vary due to localized variations in emissions sources and climate and should be considered “generally” representative of ambient concentrations near the Project Site. See Table 3, Air Monitoring Station Ambient Pollutant Concentrations.

Table 3
Air Monitoring Station Ambient Pollutant Concentrations

Pollutant Standards1 Year
2022 2023 2024
Carbon Monoxide (CO)
Maximum 1-hour concentration monitored (ppm) 1.6 1.3 1.4 Maximum 8-hour concentration monitored (ppm) 9 ppm 1.3 1.0 1.1 Number of days exceeding state 1-hour standard 20 ppm 0 0 0 Number of days exceeding federal 1-hour standard 35 ppm 0 0 0 Ozone (O3)
Maximum 1-hour concentration monitored (ppm) 0.143 0.109 0.143 Maximum 8-hour concentration monitored (ppm) 0.102 0.090 0.099 Number of days exceeding state 1-hour standard 0.09 ppm 12 24 21 Number of days exceeding federal/state 8-hour standard 0.070 ppm 23 34 42 Nitrogen Dioxide (NO2)
Maximum 1-hour concentration monitored (ppm) 0.066 0.049 0.062 Annual average concentration monitored (ppm) 0.013 0.011 0.013 Number of days exceeding state 1-hour standard 0.18 ppm 0 0 0 Fine Particulate Matter (PM2.5)
Maximum 24-hour concentration monitored (µg/m3) 22.10 22.20 51.30 Annual average concentration monitored (µg/m3) 9.11 8.74 10.89 Number of samples exceeding federal standard 35 µg/m3 0 0 2

Source: South Coast Air Quality Management District. Historical Data By Year. Available at: https://www.aqmd.gov/home/air- quality/historical-air-quality-data/historical-data-by-year, accessed October 2025.

NA = not available
1 Parts by volume per million of air (ppm), micrograms per cubic meter of air (µg/m3), or annual arithmetic mean (aam). 2 The 8-hour federal O3 standard was revised from 0.075 ppm to 0.070 ppm in 2015. The statistics shown are based on the 2015 standard of

0.070 ppm.

2.0 Environmental Setting
Impact Sciences, Inc. 10 600 North Rosemead Boulevard Project 1136.019 Air Quality Technical Report – April 2026
The attainment status for the Basin region is included in Table 4, Attainment Status of Criteria Pollutants in the South Coast Air Basin . Areas that meet ambient air quality standards are classified as attainment areas, while areas that do not meet these standards are classified as nonattainment areas. The Basin region is designated as a nonattainment area for federal ozone, PM2.5, and lea d standards and is designated as nonattainment for state ozone, PM10, and PM2.5 standards.

Table 4
Attainment Status of Criteria Pollutants in the South Coast Air Basin

Air Pollutant CAAQS NAAQS
Ozone (1-Hour) Nonattainment Nonattainment (Extreme)
Ozone (8-Hour) Nonattainment Nonattainment (Extreme)
Carbon Monoxide
(1-Hour and 8-Hour) Attainment Attainment (Maintenance) Nitrogen Dioxide (1-Hour) Attainment Unclassified/Attainment Nitrogen Dioxide (Annual) Attainment Attainment (Maintenance) Sulfur Dioxide (1-Hour) n/a Unclassified/Attainment
Sulfur Dioxide (24-Hour) n/a Unclassified/Attainment
PM2.5 (24-Hour) n/a Nonattainment (Serious)
PM2.5 (Annual) Nonattainment Pending
PM10 (24-Hour) Nonattainment Attainment (Maintenance)
PM10 (Annual) Nonattainment n/a
Lead (Pb) n/a Nonattainment (Partial)

Source: Southern California Air Quality Management District (SCAQMD), National Ambient Air Quality Standards (NAAQS) and California Ambient Air Quality Standards (CAAQS) Attainment Status for South Coast Air Basin, available at:
http://www.aqmd.gov/docs/default-source/clean-air-plans/air-quality-management-plans/naaqs-caaqs-feb2016.pdf, accessed March 3, 2026.

Toxic Air Contaminants
In addition to the criteria pollutants discussed above, toxic air contaminants (TACs) are another group of pollutants of concern. TACs are considered either carcinogenic or noncarcinogenic based on the nature of the health effects associated with exposure to the pollutant. For regulatory purposes, carcinogenic TACs are assumed to have no safe threshold below which health impacts would not occur, and cancer risk is expressed as excess cancer cases per one million exposed individuals. Noncarcinogenic TACs differ in that there is generally assumed to be a safe level of exposure below which no negative health impact is believed to occur. These levels are determined on a pollutant-by-pollutant basis.

2.0 Environmental Setting
Impact Sciences, Inc. 11 600 North Rosemead Boulevard Project 1136.019 Air Quality Technical Report – April 2026
There are many different types of TACs, with varying degrees of toxicity. Sources of TACs include industrial processes, such as petroleum refining and chrome -plating operations; commercial operations, such as gasoline stations and dry cleaners; and motor v ehicle exhaust. Public exposure to TACs can result from emissions from normal operations, as well as from accidental releases of hazardous materials during upset conditions. The health effects associated with TACs are quite diverse and generally are assessed locally, rather than regionally. TACs can cause long -term health effects such as cancer, birth defects, neurological damage, asthma, bronchitis, or genetic damage, or short -term acute affects such as eye watering, respiratory irritation (a cough), running nose, throat pain, and headaches.

To date, the California Air Resources Board (CARB) has designated 244 compounds as TACs. Additionally, CARB has implemented control measures for a number of compounds that pose high risks and show potential for effective control. The majority of the estima ted health risks from TACs can be attributed to a relatively few compounds.
3 CARB identified diesel particulate matter (DPM) as a TAC. DPM differs from other TACs in that it is not a single substance but rather a complex mixture of hundreds of substances. Diesel exhaust is a complex mixture of particulates and gases produced when an engine burns diesel fuel. DPM is a concern because it causes lung cancer; many compounds found in diesel exhaust are carcinogenic. DPM includes the particle- phase constituents in diesel exhaust. The chemical composition and particle sizes of DPM vary bet ween different engine types (heavy -duty, light-duty), engine operating conditions (idle, accelerate, decelerate), fuel formulations (high/low sulfur fuel), and the year of the engine. Some short-term (acute) effects of diesel exhaust include eye, nose, throat, and lung irritation, and diesel exhaust can cause coughs, headaches, light- headedness, and nausea. DPM poses the greatest health risk among the TACs. Almost all diesel exhaust particle mass is 10 microns or less in diameter. Because of their extremely small size, these particles can be inhaled and eventually trapped in the bronchial and alveolar regions of the lung.

Sensitive Receptors
Some land uses are considered more sensitive to air pollution than others due to the types of population groups or activities involved. Sensitive population groups include children, the elderly, the acutely ill, and the chronically ill, especially those with cardiovascular diseases. 4 3 California Air Resources Board, “CARB Identified Toxic Air Contaminants.” Available online at:
https://ww2.arb.ca.gov/resources/documents/carb-identified-toxic-air-contaminants, accessed March 4, 2026. 4 California Air Resources Board, “Sensitive Receptor Assessment.” Available online at:
https://ww2.arb.ca.gov/capp-resource-center/community-assessment/sensitive-receptor-assessment, accessed March 4, 2026.

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Residential areas are considered sensitive receptors to air pollution because residents (including children and the elderly) tend to be at home for extended periods of time, resulting in sustained exposure to any pollutants present. Children are considered more susceptible to health effects of air pollution due to their immature immune systems and developing organs. 5 As such, schools are also considered sensitive receptors, as children are present for extended durations and engage in regular outdoor activities.

Recreational land uses are considered moderately sensitive to air pollution. Although exposure periods are generally short, exercise places a high demand on respiratory functions, which can be impaired by air pollution. In addition, noticeable air pollution can detract from the enjoyment of recreation. The closest air quality sensitive receptors to the Project Site are the adjacent residences to the south along North Rosemead Boulevard (15 feet to the nearest structure) , adjacent residences to the east along Rim Road (59 feet to the nearest structure) , the Sierra Madre Villa Avenue Baseball Field (361 feet), a nd residences across S ierra Madre Villa Avenue (474 feet).

5 Office of Environmental Health Hazard Assessment and The American Lung Association of California, “Air Pollution and Children’s Health.” Available online at: https://oehha.ca.gov/air/air-pollution-and-childrens- health-fact-sheet-oehha-and-american-lung-association, accessed March 4, 2026.

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3.0 REGULATORY FRAMEWORK

3.1 FEDERAL
Clean Air Act
The Clean Air Act (CAA) of 1970 and the CAA Amendments of 1971 required the U.S. Environmental Protection Agency (U.S. EPA) to establish NAAQS, with states retaining the option to adopt more stringent standards or to include other specific pollutants. On A pril 2, 2007, the Supreme Court found that carbon dioxide is an air pollutant covered by the CAA.. On February 12, 2026, EPA finalized a rule rescinding the Endangerment Finding for greenhouse gas emissions from motor vehicles under Section 202(a) of the CAA and repealed associated federal greenhouse gas emission standards for light -, medium-, and heavy -duty vehicles. No NAAQS have been established for carbon dioxide. These standards are the levels of air quality considered safe, with an adequate margin of safety, to protect the public health and welfare. They are designed to protect those “sensitive receptors” most susceptible to further respiratory distress such as asthmatics, the elderly, very young children, people already weakened by other disease or illness, and persons engaged in strenuous work or exercise. Healthy adults can tolerate occasional exposure to air pollutant concentrations considerably above these minimum standards before adverse effects are observed.

The U.S. EPA has classified air basins (or portions thereof) as being in attainment, nonattainment, or unclassified for each criteria air pollutant, based on whether the NAAQS have been achieved. If an area is designated unclassified, it is because inadequate air quality data were available as a basis for nonattainment or attainment designations. Table 4 lists the federal attainment status of the Basin for the criteria pollutants.

National Emissions Standards for Hazardous Air Pollutants Program Under federal law, 187 substances are currently listed as hazardous air pollutants (HAPs). Major sources of specific HAPs are subject to the requirements of the National Emissions Standards for Hazardous Air Pollutants (NESHAPS) program. The U.S. EPA is establishing regulatory schemes for specific source categories and requires implementation of the Maximum Achievable Control Technologies (MACT) for major sources of HAPs in each source category. State law has established the framework for California’s TAC identification and control program, which is generally more stringent than the federal program and is aimed at HAPs that are a problem is California. The state has formally identified 244 substances as TACs and is adopting appropriate control measures for each. Once adopted at the state level, each air district will be required to adopt a measure that is equally or more stringent.

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National Ambient Air Quality Standards
The federal CAA required the U.S. EPA to establish NAAQS. The NAAQS set primary standards and secondary standards for specific air pollutants. Primary standards define limits for the intention of protecting public health, which include sensitive populations such as asthmatics, children, and the elderly.

Secondary Standards define limits to protect public welfare to include protection against decr eased visibility, damage to animals, crops, vegetation, and buildings. A summary of the federal ambient air quality standards is shown in Table 5, National Ambient Air Quality Standards.

Table 5
National Ambient Air Quality Standards

Pollutant Primary/Secondary Averaging Time Level
Carbon monoxide Primary
8 hours 9 ppm
1 hour 35 ppm
Lead Primary and secondary Rolling 3-month average 0.15 µg/m3 Nitrogen dioxide
Primary 1 hour 100 ppb
Primary and secondary Annual 53 ppb
Ozone Primary and secondary 8 hours 0.070 ppm
Particulate
Matter
PM2.5
Primary Annual 9 µg/m3
Secondary Annual 15 µg/m3
Primary and secondary 24 hours 35 µg/m3
PM10 Primary and secondary 24 hours 150 µg/m3
Sulfur dioxide
Primary 1 hour 75 ppb
Secondary Annual 10 ppb

Source: United States Environmental Protection Agency. December 2024. NAAQS Table. Available online at: https://www.epa.gov/criteria-air- pollutants/naaqs-table

3.2 STATE
California Clean Air Act of 1988
The California CAA of 1988 (CCAA) allows the state to adopt ambient air quality standards and other regulations provided that they are at least as stringent as federal standards. CARB, a part of the California Environmental Protection Agency (Cal EPA), is responsible for the coordination and administration of both federal and state air pollution control programs within California, including setting the CAAQS. The CCAA, amended in 1992, requires all air quality management districts (AQMDs) in the state to achieve and maintain the CAAQS. The CAAQS are generally stricter than national standards for the same pollutants and has also established state standards for sulfates, hydrogen sulfide, vinyl chloride, and visibility-

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reducing particles, for which there are no national standards. CARB also conducts research, compiles emission inventories, develops suggested control measures, and provides oversight of local programs.

CARB also has primary responsibility for the development of California’s State Implementation Plan (SIP), for which it works closely with the federal government and the local air districts.

California Ambient Air Quality Standards
The federal CAA permits states to adopt additional or more protective air quality standards if needed.

California has set standards for certain pollutants, such as particulate matter and ozone, which are more protective of public health than respective federal standards. California has also set standards for some pollutants that are not addressed by federal standards. The state standards for ambient air quality are summarized in Table 6, California Ambient Air Quality Standards .

Table 6
California Ambient Air Quality Standards

Pollutant Averaging Time Level
Carbon monoxide
8 hours 9 ppm
1 hour 20 ppm
Lead 30-day average 1.5 µg/m3
Nitrogen dioxide
1 hour 0.180 ppm
Annual 0.030 ppm
Ozone
8 hours 0.070 ppm
1 hour 0.09 ppm
Particulate matter
PM2.5 Annual 12 µg/m3
PM10
24 hours 50 µg/m3
Annual 20 µg/m3
Sulfur dioxide
1 hour 0.25 ppm
24 hours 0.04 ppm
Sulfates 24 hours 25 µg/m3
Hydrogen sulfide 1 hour 0.03 ppm
Vinyl chloride 24 hours 0.01 ppm

Source: California Air Resources Board. July 2025. Table of Ambient Air Quality Standards. Available online at:
https://ww2.arb.ca.gov/sites/default/files/2024-08/AAQS%20Table_ADA_FINAL_07222024.pdf.

California State Implementation Plan
The federal CAA (and its subsequent amendments) requires each state to prepare an air quality control plan referred to as a State Implementation Plan (SIP). The SIP is a living document that is periodically modified to reflect the latest emissions inventories, plans, and rules and regulations of air basins as reported

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by the agencies with jurisdiction over them. The CAA Amendments dictate that states containing areas violating the NAAQS revise their SIPs to include extra control measures to reduce air pollution. The SIP includes strategies and control measures to attain the NAAQS by deadlines established by the CAA. The EPA has the responsibility to review all SIPs to determine if they conform to the requirements of the CAA.

State law makes CARB the lead agency for all purposes related to the SIP. Local air districts and other agencies prepare SIP elements and submit them to CARB for review and approval. CARB then forwards SIP revisions to the EPA for approval and publication in the Federal Register. The 2022 Air Quality Management Plan (2022 AQMP) is the SIP for the Basin. The AQMP identifies the control measures that will be implemented to reduce major sources of pollutants. Implementation of control measures established in t he previous AQMPs has substantially decreased the population’s exposure to unhealthful levels of pollutants, even while population growth has occurred in the SCAB.

On December 2, 2022, the SCAQMD Governing Board approved the 2022 AQMP that lays a path for improving air quality and meeting federal air pollution standards by 2037. The AQMP aims to, among other goals, reduce almost 70 percent of smog forming emissions b y 2037 beyond existing regulations, require zero-emission technologies across all sectors, and lay out specific actions needed from the federal government to reduce emissions from ships, trains, aircraft, and other sources primarily under federal regulatory authority. The 2022 AQMP also focuses on communities disproportionately impacted by air pollution with a dedicated chapter on environmental justice. 6 The future air quality levels forecast in the 2022 AQMP are based on the most recent assumptions provided by both CARB and the Southern California Association of Governments (SCAG) for motor vehicle emissions and demographic updates and includes updated tr ansportation conformity budgets. 7 For
example, future growth projections were based on demographic growth forecasts for various socioeconomic categories (e.g., population, housing, employment by industry) developed by SCAG for their 2020-2045 Regional Transportation Plan/Sustainable Communities Strategy (RTP/SCS). 8 Although a
more recent RTP/SCS has been adopted by the SCAG (Connect SoCal 2024), the 2020 -2045 RTP/SCS was utilized in the formation of the AQMP. The 2022 AQMP also assumes that development projects will include strategies (mitigation measures) to reduce emissions generated during construction and operation in accordance with SCAQMD and local jurisdiction regulations, which are designed to address air quality

6 South Coast Air Quality Management District, South Coast AQMD Finalizes Most Ambitious Strategy to Cut Pollution, 2022. Available online at: http://www.aqmd.gov/docs/default-source/news-archive/2022/aqmp- adopted-dec2-2022.pdf, accessed March 4, 2026.
7 Ibid.
8 Ibid. The RTP/SCS is available online at: https://scag.ca.gov/sites/main/files/file-attachments/0903fconnectsocal- plan_0.pdf?1606001176 .

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impacts and pollution control measures. The 2022 AQMP acknowledges that the most significant air quality challenge in the Basin is to reduce NOX emissions sufficiently to meet the upcoming ozone standard deadlines. The 2022 AQMP incorporates the latest sci entific and technical information and planning assumptions, including SCAG’s 2020-2045 RTP/SCS emission inventory methodologies for various source categories and growth forecasts. The 2022 AQMP includes integrated strategies and measures to meet the NAAQS.

California Air Toxics “Hot Spots” Information and Assessment Act (AB 2588) The California Air Toxics Program is supplemented by the Air Toxics “Hot Spots” program, which became law (Assembly Bill [AB] 2588, Statutes of 1987) in 1987. In 1992, the AB 2588 program was amended by Senate Bill 1731 to require facilities that pose a significant health risk to the community to perform a risk reduction audit and reduce their emissions through implementation of a risk management plan. Under this program, which is required under the Air Toxics “Hot Spots” Information and Assessment Act (Sec tion 44363 of the California Health and Safety Code), facilities are required to report their air toxics emissions, assess health risks, and notify nearby residents and workers of significant risks when present.

Typically, land development projects generate diesel emissions from construction vehicles during the construction phase, as well as some diesel emissions from small trucks during the operational phase. Diesel exhaust is mainly composed of particulate matte r and gases, which contain potential cancer -causing substances. Emissions from diesel engines currently include over 40 substances that are listed by the U.S.

EPA as hazardous air pollutants and by CARB as TACs. On August 27, 1998, CARB identified particulate matter in diesel exhaust as a TAC, based on data linking diesel particulate emissions to increased risks of lung cancer and respiratory disease.
9 In March 2015, the Office of Environmental Health Hazard Assessment (OEHHA) adopted The Air Toxics Hot Spots Program Guidance Manual for Preparation of Health Risk Assessments in accordance with the Health and Safety Code, Section 44300. The 2015 OEHHA Final Guidance Manual incorporates the scientific basis from three earlier developed Technical Support Documents to assess risk from exposure to facility emissions. The 2015 OEHHA Final Guidance Manual has key changes including greater age sensitivity in particular for children, decreased exposure durations, and higher breathing rate profiles. Because cancer risk could be up to three times greater using this new guidance, it may result in greater mitigation requirements, more agency backlog, and increased diff iculty in getting air permits. Regardless of the

9 Diesel exhaust is included within pollutants subject to the hotspot program. Please refer to OEHHA’s Air Toxics Hot Spot Program Risk Assessment Guidelines. https://oehha.ca.gov/air/crnr/notice-adoption-air-toxics-hot- spots-program-guidance-manual-preparation-health-risk-0

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change in calculation methodology, actual emissions and cancer risk within South Coast Air Basin has declined by more than 50 percent since 2005.

The CARB provides a computer program, the Hot Spots Analysis and Reporting Program (HARP), to assist in a coherent and consistent preparation of a Health Risk Assessment (HRA). HARP2, an update to HARP, was released in March 2015. HARP2 has a more refined risk characterization in HRA and CEQA documents and incorporates the 2015 OEHHA Final Guidance Manual.

3.3 REGIONAL
South Coast Air Quality Management District
The SCAQMD is the air pollution control district for Orange County and the non- desert portions of Los Angeles, Riverside, and San Bernardino Counties. The agency’s primary responsibility is ensuring that the Basin region meets attainment for the federal an d state standards. The SCAQMD is responsible for preparing an air quality management plan in order to meet federal attainment status. The SCAQMD is also responsible for adopting and enforcing rules and regulations concerning air pollutant sources, issuing permits for stationary sources of air pollutants, inspecting stationary sources of air pollutants, responding to citizen complaints, monitoring ambient air quality and meteorological conditions, awarding grants to reduce motor vehicle emissions, and conduc ting public education campaigns, as well as many other activities. All projects are subject to SCAQMD rules and regulations in effect at the time of construction.

SCAQMD Rules and Regulations
The following is a list of noteworthy SCAQMD rules that are required of construction activities associated with the Project:
• Rule 402 (Nuisance) – This rule prohibits the discharge from any source whatsoever such quantities of air contaminants or other material which cause injury, detriment, nuisance, or annoyance to any considerable number of persons or to the public, or which endanger the comfort , repose, health, or safety of any such persons or the public, or which cause, or have a natural tendency to cause, injury or damage to business or property. This rule does not apply to odors emanating from agricultural operations necessary for the growing of crops or the raising of fowl or animals. • Rule 403 (Fugitive Dust) – This rule requires fugitive dust sources to implement best available control measures for all sources, and all forms of visible particulate matter are prohibited from crossing any property line. This rule is intended to reduce PM10 emissions from any tra nsportation, handling,

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construction, or storage activity that has the potential to generate fugitive dust. PM10 suppression techniques are summarized below.
− Portions of a construction site to remain inactive longer than a period of three months will be seeded and watered until grass cover is grown or otherwise stabilized. − All on-site roads will be paved as soon as feasible or watered periodically or chemically stabilized. − All material transported off -site will be either sufficiently watered or securely covered to prevent excessive amounts of dust.
− The area disturbed by clearing, grading, earthmoving, or excavation operations will be minimized at all times.
− Where vehicles leave a construction site and enter adjacent public streets, the streets will be swept daily or washed down at the end of the work day to remove soil tracked onto the paved surface. • Rule 1113 (Architectural Coatings) – This rule requires manufacturers, distributors, and end- uses of architectural and industrial maintenance coatings to reduce ROG emissions from the use of these coatings, primarily by placing limits on the ROG content of various coating categories. • Rule 445 (Wood-Burning Devices) – The purpose of this rule is to reduce the emission of particulate matter from wood-burning devices and establish contingency measures for applicable ozone standards for the reduction of volatile organic compounds.

The rule requires that any new residential or commercial development that begins construction on or after March 9, 2009, only install gaseous-fueled fireplaces and stoves. 10 Southern California Association of Governments
SCAG is the regional planning agency for Los Angeles, Ventura, Orange, Riverside, San Bernardino, and Imperial Counties. SCAG develops long- range regional transportation plans including sustainable communities’ strategy and growth forecast components, regi onal transportation improvement programs, regional housing needs allocations and a portion of the South Coast Air Quality management plans. As required by federal and state law, SCAG develops plans pertaining to transportation, growth management,

10 SCAQMD, Rule 445 – Wood Burning Devices Local Government, Builder, Contractor, Architect Answers to Frequently Asked Questions (FAQs), October 2019. Available online at: http://www.aqmd.gov/docs/default-source/rule- book/support-documents/rule-445/detailed-rule-445-information.pdf., accessed March 4, 2026.

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hazardous waste management, housing, and air quality. SCAG data are used in the preparation of air quality forecasts and the conformity analysis included in the AQMP.

To implement SB 375 and reduce greenhouse gas (GHG) emissions by correlating land use and transportation planning, SCAG adopted the RTP/SCS on April 4, 2024. 11 The Connect SoCal 2024 outlines a vision for a more resilient and equitable future, with investment, policies and strategies for achieving the region’s shared goals of health, prosperity, accessibility, and connectedness through 2050, with a particular focus on system management, revitalization, and reuse, such as infill development and repurposing underutilized properties. The vision for the region incorporates a range of best practices for increasing transportation choices, reducing dependence on persona l automobiles, further improving air quality, and encouraging growth in walkable, mixed -use communities with ready access to transit infrastructure and employment. More and varied housing types and employment opportunities would be located in and near job centers, transit stations and walkable neighborhoods where goods and services are easily accessible via shorter trips. To support shorter trips, people would have the choice of using neighborhood bike networks, car share or micro -mobility services like sha red bicycles or scooters. For longer commutes, people would have expanded regional transit services and more employer incentives to carpool or vanpool. Other longer trips would be supported by on-demand services such as micro transit, carshare, and citywide partnerships with ride hailing services. For those that choose to drive, hotspots of congestion would be less difficult to navigate due to cordon pricing and using an electric vehicle will be easier thanks to an expanded regional charging network. The RTP/SCS is expected to reduce per capita transportation emissions by 19 percent by 2035, which is consistent with SB 375 compliance with respect to meeting the State’s GHG emission reduction goals.
12 The RTP/SCS states that the SCAG region is home to about 18.8 million people and currently includes approximately 6.0 million homes and 9 million jobs.
13 The integrated growth forecast projects that, by 2050, these figures will increase by 2 million people, with nearly 1.6 million more housing units and 1.3 million more jobs.
14 The RTP/SCS overall land use pattern reinforces the trend of focusing on new housing and employment in the region’s Priority Development Areas (PDAs). PDAs account for 8.2 percent of the region’s total land area, but implementation of SCAG’s recommended g rowth strategies will help these areas accommodate 66 percent of forecasted household growth and 54 percent of forecasted employment

11 SCAG, Connect SoCal 2024 RTP/SCS, April 4, 2024. Available online at: https://scag.ca.gov/sites/default/files/2024- 05/23-2987-connect-socal-2024-final-complete-040424.pdf, accessed March 4, 2026. 12 SCAG, Final Connect SoCal 2024, Chapter 3: The Plan, p. 74, accessed March 4, 2026. 13 SCAG, Final Connect SoCal 2024, Chapter 2: Our Region Today, p. 24, accessed March 4, 2026. 14 SCAG, Final Connect SoCal 2024, Chapter 1: Executive Summary, p. 4, accessed March 4, 2026.

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growth between 2019 and 2050. The Project Site is located within a PDA. 15 PDAs are areas within the SCAG region where future growth can be located to help the region reach Plan goals; PDAs in the Connect SoCal 2024 include Neighborhood Mobility Areas, Transit Priority Areas (TPAs), Livable Corridors, and Spheres of Influence (in unincorporated areas only). PDAs follow the principles of center -focused placemaking, providing locations where many Connect SoCal strategies can be fully realized. This more compact form of regional development, if fully realized, can reduce travel dista nces, increase mobility options, improve access to workplaces and conserve the region’s resource areas.

15 SCAG, Connect SoCal 2024 RTP/SCS, April 4, 2024. Available online at: https://scag.ca.gov/sites/default/files/2024- 05/23-2987-connect-socal-2024-final-complete-040424.pdf, accessed March 4, 2026.

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4.0 AIR QUALITY ANALYSIS

4.1 THRESHOLDS AND METHODOLOGY
Thresholds of Significance
The impact analysis provided below is based on the application of the following California Environmental Quality Act (CEQA) Guidelines Appendix G, which indicates that a Project would have a significant impact on air quality if it would:

1. Conflict with or obstruct implementation of any applicable air quality plan.

2. Result in a cumulatively considerable net increase of any criteria pollutant for which the project region is nonattainment under an applicable federal or state ambient air quality standard.

3. Expose sensitive receptors to substantial pollutant concentrations.

4. Result in other emissions (such as those leading to odors), adversely affecting a substantial number of people.

Consistency with the Applicable AQMP
The SCAQMD has adopted criteria for consistency with regional plans and the regional AQMP in its CEQA Air Quality Handbook. Specifically, the indicators of consistency are: 1) whether the project would increase the frequency or severity of existing air quality violations or cause or contribute to new air quality violations; and 2) whether the project would exceed the assumptions utilized in preparing the AQMP.

Violation of Standards or Substantial Contribution to Air Quality Violations As the agency principally responsible for comprehensive air pollution control in the Basin, the SCAQMD recommends that projects should be evaluated in terms of air pollution control thresholds established by the SCAQMD and published in the CEQA Air Quality Handbook. These thresholds were developed by the SCAQMD to provide quantifiable levels to which projects can be compared. The most current significance thresholds, shown in Table 7, South Coast AQMD Air Quality Significance Thresholds , are used in this analysis.

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Table 7
South Coast AQMD Air Quality Significance Thresholds

Mass Daily Thresholds a
Pollutant Construction b Operation c
NOx 100 lbs/day 55 lbs/day
VOC 75 lbs/day 55 lbs/day
PM10 150 lbs/day 150 lbs/day
PM2.5 55 lbs/day 55 lbs/day
SOx 150 lbs/day 150 lbs/day
CO 550 lbs/day 550 lbs/day
Lead 3 lbs/day 3 lbs/day
Toxic Air Contaminants (TACs), Odor, and Greenhouse Gas (GHG) Thresholds TACs
(including carcinogens and non-
carcinogens)
Maximum Incremental Cancer Risk ≥ 10 in 1 million
Cancer Burden > 0.5 excess cancer cases (in areas ≥ 1 in 1 million) Chronic & Acute Hazard Index ≥ 1.0 (Project increment)
Odor Project creates an odor nuisance pursuant to South Coast AQMD Rule 402 GHG 10,000 MT/yr CO2eq for industrial facilities
Ambient Air Quality Standards for Criteria Pollutants d NO2
1-hour average
annual arithmetic mean
South coast AQMD is in attainment; Project is significant if it causes or contributes to an exceedance of the following attainment standards:

0.18 ppm (state)

0.03 ppm (state) and 0.0534 ppm (federal)
PM10
24-hour average
annual average

10.4 µg/m3 (construction) e & 2.5 µg/m3 (operation)

1.0 µg/m3
PM2.5
24-hour average 10.4 µg/m3 (construction) e & 2.5 µg/m3 (operation) SO2
1-hour average
24-hour average

0.25 ppm (state) & 0.075 ppm (federal - 99th percentile)

0.04 ppm (state)
Sulfate
24-hour average 25 µg/m3 (state)
CO

1-hour average
8-hour average
South Coast AQMD is in attainment; Project is significant if it causes or contributes to an exceedance of the following attainment standards:
20 ppm (state) and 35 ppm (federal)

9.0 ppm (state/federal)
Ambient Air Quality Standards for Criteria Pollutants d (continued) Lead
30-day Average
Rolling 3-month average

1.5 µg/m3 (state)

0.15 µg/m3 (federal)

a Source: South Coast AQMD CEQA Handbook (South Coast AQMD, 1993) b Construction thresholds apply to both the South Coast Air Basin and Coachella Valley (Salton Sea and Mojave Desert Air Basins). c For Coachella Valley, the mass daily thresholds for operation are the same as the construction thresholds. d Ambient air quality thresholds for criteria pollutants based on South Coast AQMD Rule 1303, Table A-2 unless otherwise stated. e Ambient air quality threshold based on South Coast AQMD Rule 403.

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Cumulatively Considerable Increase of Criteria Pollutants The SCAQMD’s CEQA Air Quality Handbook identifies several methods to determine the cumulative significance of land use projects (i.e., whether the contribution of a project is cumulatively considerable).

However, the SCAQMD no longer recommends the use of these methodologies. Instead, the SCAQ MD recommends that any construction- related emissions and operational emissions from individual development projects that exceed the project-specific mass daily emissions thresholds identified above also be considered cumulatively considerable.16 The SCAQMD neither recommends quantified analyses of the emissions generated by a set of cumulative development projects nor provides thresholds of significance to be used to assess the impacts associated with these emissions.

Exposure of Sensitive Receptors to Substantial Pollutant Concentrations The SCAQMD currently recommends that impacts to sensitive receptors be considered significant when a project generates localized pollutant concentrations of NO 2, CO, PM10, or PM2.5 at sensitive receptors near
a project site that exceed the localized pollutant concentration thresholds listed above or when a project’s traffic causes CO concentrations at sensitive receptors located near congested intersections to ex ceed the national or state ambient air quality standards. The roadway CO thresholds would also a pply to the contribution of emissions associated with cumulative development. Additionally, the SCAQMD recommends impacts to sensitive receptors be considered significant if a project exceeds the TAC thresholds detailed in Table 7 above.

In addition, the SCAQMD has established localized significance thresholds in the form of ambient air quality standards for criteria pollutants. To minimize the need for detailed air quality modeling to assess localized impacts, SCAQMD developed mass- based localized significance screening criteria that are the amount of pounds of emissions per day that can be generated by a project that would cause or contribute to adverse localized air quality impacts. These screening criteria, are found in the mass rate lo ok-up tables in the “Final Localized Significance Threshold Methodology” document prepared by the SCAQMD. 17 The
screening criteria represent the maximum emissions from a project that are not expected to cause or contribute to an exceedance of the most stringent applicable federal or state ambient air quality standards, and are developed based on the ambient concentrations of that pollutant for each SRA.

16 SCQMD, White Paper on Regulatory Options for Addressing Cumulative Impacts from Air Pollution Emissions, SCAQMD Board Meeting, September 5, 2003, Agenda No. 29, Appendix D, p. D-3. 17 SCAQMD, Final Localized Significance Threshold Methodology, June 2003, Revised July 2008. Available online at:
https://www.aqmd.gov/docs/default-source/ceqa/handbook/localized-significance-thresholds/appendix-c-mass- rate-lst-look-up-tables.pdf?sfvrsn=8e641d61_2, accessed March 4, 2026.

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Exposure to Objectionable Odors
A significant impact may occur if objectionable odors occur that would adversely impact sensitive receptors. Odors are typically associated with industrial projects involving the use of chemicals, solvents, petroleum products, and other strong -smelling ele ments used in manufacturing processes, as well as sewage treatment facilities and landfills.

Methodology
This analysis focuses on the nature and magnitude of the change in the air quality environment due to implementation of the Project. Air pollutant emissions associated with the Project would result from Project operations and from Project -related traffic v olumes. Construction activities would also generate air pollutant emissions at the Project Site and on roadways resulting from construction-related traffic. The net increase in Project Site emissions generated by these activities and other secondary source s have been quantitatively estimated and compared to thresholds of significance recommended by the SCAQMD (see Project Impacts subsection, below).

Construction Emissions
The regional construction emissions associated with the Project were calculated using the California Emissions Estimator Model (CalEEMod).
18 CalEEMod was developed in collaboration with the air districts of California as a statewide land use emissions computer model designed to provide a uniform platform for government agencies, land use planners, and environmental professionals to quantify potential criteria pollutant and greenhouse gas (GHG) emissions associated with both construction and operations from a variety of land use projects.

Construction activities associated with demolition, grading and building construction would generate pollutant emissions. Specifically, these construction activities would temporarily create emissions of dust, fumes, equipment exhaust, and other air contaminants. These construction emissions were compared t o the thresholds established by the SCAQMD.

In addition to the SCAQMD’s regional significance thresholds, the SCAQMD has established localized significance criteria in the form of ambient air quality standards for criteria pollutants. For the purposes of a CEQA analysis, the SCAQMD considers a sensitive receptor to be a receptor such as residence, hospital, or convalescent facility where it is possible that an individual could remain for 24 hours. Thus, according to the SCAQMD, the localized significance thresholds (LSTs) for PM10 and PM2.5, which ar e based on a

18 California Air Pollution Control Officers Association, CalEEMod. Available online at: caleemod.com.

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24-hour averaging period, would be appropriate to evaluate the localized air quality impacts of a project on nearby sensitive receptors. Additionally, since a sensitive receptor is considered to be present onsite for 24 hours, LSTs based on shorter averaging times, such as the one-hour NO2 or the one-hour and eight-hour CO ambient air quality standards, would also apply when evaluating localized air quality impacts on sensitive receptors. However, LSTs based on shorter averaging periods, such as the NO2 and CO LSTs, are applied to receptors such as industrial or commercial facilities since it is reasonable to assume that workers at these sites could be present for periods of one to eight hours. 19 Therefore, this analysis evaluates localized air quality impacts from construction activities associated with the Project on sensitive receptors for NO2, CO, PM10, and PM2.5, and on “non -sensitive” receptors (e.g., industrial or commercial facilities) for NO2 and CO.

Operational Emissions
Operational emissions associated with the Project were also calculated using CalEEMod. Operational emissions associated with the Project would comprise mobile source emissions, energy demand, and other area source emissions. Mobile source emissions are generated by the increase in motor vehicle trips to and from the Project Site associated with operation of the Project. Area source emissions are generated by natural gas consumption for space and water heating, landscape maintenance equipment, application of architectural coatings, and consumer products. To determine if a regional air quality impact would occur, the increase in emissions is compared with the SCAQMD’s recommended regional thresholds for operational emissions.

As discussed above, the SCAQMD has developed LSTs that are based on the amount of pounds of emissions per day that can be generated by a project that would cause or contribute to adverse localized air quality impacts. However, because the LST methodology is applicable to projects where emission sources occupy a fixed location, LST methodology would typically not apply to the operational phase of the Project because emissions are primarily generated by mobile sources traveling on local roadways over potentially large distances or areas. LSTs would apply to the operational phase of a project if the project includes stationary sources or attracts mobile sources that may spend long periods queuing and idling at the site. For example, the LST methodology applies to operational projects such as warehouse/transfer facilities.
20 As the Project would consist of a residential care facility, an operational analysis against the LST methodology is not directly applicable.

19 California Air Pollution Control Officers Association, CalEEMod. Available online at: caleemod.com 20 SCAQMD, Sample Construction Scenarios for Projects Less than Five Acres in Size, February 2005, page 1-3.

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4.2 PROJECT IMPACTS
AQ Impact 1 Would implementation of the Proposed Project conflict with or obstruct implementation of any applicable air quality plan? (Less than Significant).

As part of its enforcement responsibilities, the U.S. EPA requires each state with nonattainment areas to prepare and submit a SIP that demonstrates the means to attain the federal standards. The SIP must integrate federal, state, and local plan components and regulations to identify specific measures to reduce pollution in nonattainment areas, using a combination of performance standards and market -based programs. Similarly, under state law, the CCAA requires an air quality attainment plan to be prepared f or areas designated as nonattainment with regard to the federal and state ambient air quality standards. Air quality attainment plans outline emissions limits and control measures to achieve and maintain these standards by the earliest practical date.

Drafted by the SCAQMD, the 2022 AQMP
21 was developed in effort with CARB, SCAG, and the U.S. EPA to establish a program of rules and regulations to reduce air pollutant emissions to achieve CAAQS and NAAQS. The AQMP’s pollutant control strategies are based on SCAG’s 2020 -2045 RTP/SCS. Although SCAG has adopted the Connect SoCal 2024 RTP/SCS, the SCAQMD has not released an updated AQMP that utilizes data from the most recently adopted RTP/SCS. The SCAQMD has incorporated demographic growth forecasts from the 2020-2045 RTP/SCS into the 2022 AQMP.

Criteria for determining consistency with the AQMP are defined in Chapter 12, Section 12.2 and Section

12.3 of the SCAQMD’s 1993 CEQA Air Quality Handbook, and include the following:
• Consistency Criterion No. 1 : The Proposed Project will not result in an increase in the frequency or severity of an existing air quality violation, or cause or contribute to new violations, or delay the timely attainment of air quality standards or the interim emissions reductions specified in the AQMP. • Consistency Criterion No. 2 : The Proposed Project will not exceed the assumptions in the AQMP or increments based on the years of the Project build-out phase.

With respect to the first criterion, area air quality planning, including the AQMP, assumes that there will be emissions from new growth, but that such emissions may not impede the attainment and may actually contribute to the attainment of applicable air quality standards within the Basin. As discussed herein (see AQ Impact 2 and AQ Impact 3 ), the Project would not result in construction air quality emissions that exceed the SCAQMD thresholds of significance. Construction -related emissions would be tempora ry in

21 SCAQMD, Air Quality Management Plan, December 2022. Available online at: http://www.aqmd.gov/home/air- quality/clean-air-plans/air-quality-mgt-plan, accessed March 4, 2026.

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nature, lasting only for the duration of the construction period, and would not have a long-term impact on the region’s ability to meet state and federal air quality standards. Furthermore, the Project is required to comply with applicable SCAQMD rules and regulations for new or modified sources. For example, the Project must comply with SCAQMD Rule 403 for the control of fugitive dust during construction. By meeting SCAQMD rules and regulations, project construction activities would be consistent with the goals and objectives of the AQMP to improve air quality in the Basin. Also discussed herein (see AQ Impact 2 and AQ Impact 3 ), the Project would not result in operational air quality emissions that exceed the SCAQMD thresholds of significance. And, as discussed in more detail below, projects, land uses, and activities that are consistent with the applicable assumptions used in the development of the AQMP would not jeopardize attainment of the air quality levels identified in the AQMP. Th us, the Project would be consistent with the first criterion.

With respect to the second criterion, the AQMP was prepared to achieve national and state air pollution standards within the region. A project that is considered to be consistent with the AQMP would not interfere with attainment of AQMP goals because the g rowth from the Project is included in the regional projections used to formulate the AQMP. Therefore, projects, land uses, and activities that are consistent with the applicable assumptions used in the development of the AQMP (i.e., the RTP/SCS) would not jeopardize attainment of the air quality levels identified in the AQMP. The City’s General Plan designates the Project Site as ESPS Subarea 2 Commercial Office and is zoned EPSP -D2-CO-D-2. The Project is consistent with t his designation as the EPSP-D2-CO-D-2 zone permits multi- family residential land uses subject to compliance with all development standards. The Project proposes a total of 133 residential units within two buildings over one level of parking. According to the City’s Housing Element, in 2020 the City had an average household size of 2.44 persons per household. 22 Utilizing this value, the Project could
accommodate up to 324 residents. Conservatively assuming that all 324 Project-generated residents relocate from outside of the City, potential population growth associated with the Project would represent less than one percent of the City’s 2020 population of 138,699 persons. Population growth impacts are also assessed based on a project’s consistency with adopted plans that have addressed growth management from a local and regional standpoint. SCAG growth forecasts estimate the City’s population to reach 145,200 persons by 2050, representing a total increase of 358 persons.
23 The Project’s potential maximum incre ase of 32 5
persons would represent 90 percent of the City’s projected population increase between 2020 and 2050. As previously mentioned, this is conservatively assuming that all Project -generated residents relocate from

22 City of Pasadena, 2021-2029 General Plan Housing Element, July 18, 2022. Available online at:
https://www.cityofpasadena.net/planning/wp-content/uploads/sites/30/2021-2029-Pasadena-Housing- Element.pdf?v=1755116357598, accessed March 4, 2026.
23 SCAG, Connect SoCal 2024 Local Data Growth Forecast Data. Available online at:
https://view.officeapps.live.com/op/view.aspx?src=https%3A%2F%2Fscag.ca.gov%2Fsites%2Fdefault%2Ffiles%2 F2024-05%2Fscag2024-frtp-sed.xlsx&wdOrigin=BROWSELINK, accessed March 4, 2026.

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outside of the City, when more than likely the Project would be accommodating existing Pasadena residents. Additionally, the Project would contribute to the City’s SCAG Regional Housing Needs Assessment (RHNA) goal of developing a total of 9,429 dwelling units during the 6th-cycle planning period from 2021-2029.24 Thus, the Project is also consistent with the second criterion. As the Project is consistent with Criterion Nos. 1 and 2, it would not conflict with or obstruct implementation of any applicable air quality plan, and this impact is less than significant.

AQ Impact 2 Would implementation of the Proposed Project result in a cumulatively considerable net increase of any criteria pollutant for which the Project region is nonattainment under an applicable federal or state ambient air quality standard? (Less than Significant).

A project may have a significant impact if project -related emissions would result in a cumulatively considerable net increase for a criteria pollutant for which the region in nonattainment under applicable federal or state ambient air quality standards. The cumulat ive analysis of air quality impacts follows the SCAQMD’s guidance such that construction or operational project emissions will be considered cumulatively considerable if project-specific emissions exceed an applicable SCAQMD recommended daily threshold.

Regional Construction Significance Analysis
For purposes of this analysis, it is estimated that the Project would be constructed in approximately 2 7 months with construction beginning in 20 26 and the Project being operational in 2028. While construction may begin at a later date and/or take place over a longer period, these assumptions represent the earliest and fastest build-out potential resulting in a worst-case daily impact scenario for purposes of this analysis.

Construction activities associated with the Project would involve: (1) demolition, ( 2) site preparation/grading/foundation preparation, (3) building construction, and (4) paving and architectural coatings. The demolition phase includes the demolition of the two-story parking structure on site, resulting in approximately 3,153 cubic yards of demolitio n debris. Grading and site preparation of the Project Site would require the export of approximately 500 cubic yards of soil.

The analysis of regional daily construction emissions has been prepared utilizing the CalEEMod computer model recommended by the SCAQMD. Predicted maximum daily construction -generated emissions for the Project are summarized in Table 8, Construction-Related Criteria Pollutant and Precursor Emissions

24 City of Pasadena, 2021- 2029 General Plan Housing Element, July 18, 2022. Available online at:
https://www.cityofpasadena.net/planning/wp-content/uploads/sites/30/2021-2029-Pasadena-Housing- Element.pdf?v=1755116357598, accessed March 4, 2026.

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– Maximum Pounds per Day. These calculations assume that appropriate dust control measures would be implemented as part of the Project during each phase of development, as specified by SCAQMD Rule 403 (Fugitive Dust). Rule 403 control requirements include, but are not limited to, applying water in sufficient quantities to prevent the generation of visible dust plumes; applying soil binders to uncovered areas; reestablishing ground cover as quickly as possible; utilizing a wheel washing system to remove bulk material from tires and vehicle undercarriages before vehicles exit the Project Site; and maintaining effective cover over exposed areas. In addition, these calculations assume construction activities would be consistent with SCAQMD Rule 1113 (Architectural Coatings), which regulates the amount of VOC per liter of coating. As shown in Table 8, the peak daily emissions generated during the construction of the Project would not exceed any of the regional emission thresholds recommended by the SCAQMD. Therefo re, Project construction would not result in a cumulatively considerable increase of any criteria air pollutant for which the Project region is nonattainment under an applicable federal or state ambient air quality standard. Impacts in this regard would be less than significant.

Table 8
Construction-Related Criteria Pollutant and
Precursor Emissions – Maximum Pounds per Day

Construction Year ROG NOx CO SO2 PM10 PM2.5
2026 0.99 9.11 14.85 0.03 1.73 0.56
2027 4.01 6.56 14.62 0.02 1.99 0.62
2028 3.93 6.80 12.21 0.01 0.76 0.33
Regional Threshold 75 100 550 150 150 55
Exceed? No No No No No No

Source: Impact Sciences March 2026. See Appendix A to this report. Emissions shown are the highest daily from either summer or winter season.

Note: Project emissions account for the reductions from SCAQMD Rule 403 (Fugitive Dust).

Regional Operational Significance Analysis
Project-generated emissions would be associated with motor vehicle use , energy use, and area sources, such as the use of landscape maintenance equipment, consumer cleaning products, and architectural coatings associated with the operation of the Project. The operational emissions from the Project were calculated with CalEEMod and the operational emissions were compared against SCAQMD regional thresholds to determine Project significance. This report evaluates emissions from the Project without accounting for a reduction in emissions from existing on- site uses. As such, this represents a conservative analysis. Long-term operational emissions attributable to the Project are summarized in Table 9, Long -

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Term Operational Emissions – Maximum Pounds per Day . As shown, the operational emissions generated by the Project would not exceed the regional thresholds of significance set by the SCAQMD.

Table 9
Long-Term Operational Emissions – Maximum Pounds per Day

Source ROG NOx CO SO2 PM10 PM2.5
Mobile Source 1.45 1.02 12.16 0.03 2.90 0.75
Area Source 3.54 0.08 8.35 <0.01 <0.01 <0.01
Energy Use 0.02 0.37 0.16 <0.01 0.03 0.03
Total 5.01 1.47 20.67 0.03 2.93 0.78
Regional Threshold 55 55 550 150 150 55
Exceed? No No No No No No

Source: Impact Sciences, March 2026. See Appendix A to this report.

As shown in Table 8 and Table 9, the Project’s construction and operational emissions would not exceed the SCAQMD’s thresholds for any criteria air pollutants. Thus, the Project would also not result in a cumulatively considerable increase of any criteria air pollutant for which the Pro ject region is nonattainment under an applicable federal or state ambient air quality standard. These impacts are less than significant.

Air Quality Health Impacts
Criteria air pollutants are defined as those pollutants for which the federal and state governments have established air quality standards for outdoor or ambient concentrations to protect public health. The national and state ambient air quality standards have been set at levels to protect human health with a determined margin of safety.
25 As discussed previously, the Basin is in state non- attainment for PM2.5, PM10, and Ozone (O3) and federal non-attainment for PM2.5 and O3. Therefore, an increase in emissions of particulate matter or ozone precursors (ROG and NOx) has the potential to push the region further from reaching attainment status and, as a result, are the pollutants of greatest concern in the region. As noted in Table 8 and Table 9 above, the Project would emit criteria air pollutants during construction and operation.

However, the Project emissions would not exceed SCAQMD thresholds for ozone precursors (ROG and NOx), PM2.5, PM10, or any other criteria air pollutants, and would not result in a cumulatively significant impact for which the region is in non- attainment. Thus, with respect to the Project’s increase in criteria pollutant emissions, the Project would not have the potential cause significant air quality health impacts.

25 SCAQMD, Guidance Document for Addressing Air Quality Issues in General Plans and Local Planning, May 6, 2005.

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With respect to the Project’s potential TAC and DPM impacts upon sensitive receptors, please refer to the discussion under AQ Impact 3.

AQ Impact 3 Would implementation of the Proposed Project expose sensitive receptors to substantial air pollutant concentrations? (Less than Significant).

Localized Construction Significance Analysis
As detailed in the methodology section of this report , the SCAQMD has developed screening criteria for the LST for construction areas that are one, two, and five acres in size to simplify the evaluation of localized emissions. LST screening criteria represent the maximum emissions from a project that are not expected to cause or contribute to an exceedance of the applicable federal or State ambient air quality standard. LST screening criteria are provided for each source receptor area (SRA) and various dist ances from the source of emissions. The closest air quality sensitive receptor s are the adjacent residences along North Rosemead Boulevard.

In the case of this analysis, the Project Site is located within SRA 8 – West San Gabriel Valley with receptors located within 25 meters.
26 The Project Site is 2.15 acres and therefore LST screening criteria for a two-acre site in SRA 8 with sensitive receptors located within 25 meters were utilized to address the potential localized NOx, CO, PM10, and PM2.5 impacts. As shown in Table 10, Localized Significance of Construction Emissions – Maximum Pounds per Day, the Project would not exceed any of the mass rate screening criteria identified for localized thresholds of significance during construction. Therefore, the Project’s construction would not expose sensitive receptors to substantial air pollutant concentrations, and these impacts would be less than significant.
26 As discussed previously under ‘Methodology,’ LSTs based on shorter averaging periods, such as the NO2 and CO LSTs, are applied to receptors such as industrial or commercial facilities since it is reasonable to assume that workers at these sites could be present for periods of one to eight hours. Therefore, this analysis evaluates localized air quality impacts from construction activities associated with the Project on sensitive receptors for NO
2, CO, PM10, and PM2.5, and on “non-sensitive” receptors (e.g., industrial or commercial facilities) for NO2 and CO.

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Table 10
Localized Significance of Construction Emissions – Maximum Pounds per Day

Construction Phase NOx CO PM10 PM2.5
Demolition 6.56 9.09 0.66 0.25
Grading 8.76 13.75 0.31 0.28
Building Construction 11.72 15.72 0.45 0.41
SCAQMD Localized Significance
Mass Rate Screening Criteria 98.0 812.00 6.00 4.00
Exceed? No No No No

Source: Impact Sciences, March 2026. See Appendix A to this report.

Notes: Calculations assume compliance with SCAQMD Rule 403 – Fugitive Dust. As the proposed construction area is approximately 2.15 acres, analysis applied LST screening criteria for a two-acre site with a receptor distance of 25 meters (82 feet) in SCAQMD’s SRA 8. The building construction emission total includes architectural coating and paving emissions.

Localized Operational Significance Analysis
As discussed previously, because the LST methodology is applicable to projects where emission sources occupy a fixed location, LST methodology would typically not apply to the operational phase of a residential project because emissions for these projects are primarily generated by mobile sources traveling on local roadways over generally large distances or areas. LSTs would apply to the operational phase of a project if the project includes stationary sources or attracts mobile sources that may spend long periods queuing and idling at the site. For example, the LST methodology applies to operational projects such as warehouse/transfer facilities.
27 As the Project would not include warehouse or transfer facilities, an operational analysis against the LST methodology is not directly applicable to the Project. Nevertheless, Table 11, Localized Significance of On -Site Operational Emissions – Maximum Pounds per Day , has been included to illustrate the potential on-site emissions during Project operation. As shown in Table 11, the Project would not exceed any of the identified localized thresholds of significance. Therefore, the Project’s operation would not expose sensitive receptors to substantial air pollutant concentrations, and these impacts would be less than significant.

27 SCAQMD, Sample Construction Scenarios for Projects Less than Five Acres in Size, February 2005, page 1-3.

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Table 11
Localized Significance of On-Site Operational Emissions – Maximum Pounds per Day

Emissions Source NOx CO PM10 PM2.5
Area Sources 0.08 8.35 <0.01 <0.01
Energy Demand 0.37 0.16 0.03 0.03
Total On-Site Emissions 0.45 8.51 0.03 0.03
SCAQMD Localized Significance
Mass Rate Screening Criteria 98.00 812.00 2.00 1.00
Exceed? No No No No

Source: Impact Science, March 2026. See Appendix A to this report.

The Project would not result in potentially significant CO “hot spots” and a Project -specific CO hotspots analysis is not required to reach this conclusion. It has long been recognized that CO exceedances (“hot spots”) are caused by vehicular emissions, primarily when idling at intersections. Vehicle emissions standards have become increasingly more stringent in the last twenty years. With the turnover of older vehicles, introduction of cleaner fuels and implementation of control technology on industrial facilities, CO concentrations for the Project vicinity have historically met state and federal attainment status for the air quality standards. Based on the measured concentrations provided previously in Table 3, CO concentrations in SRA 8 are substantially below the California one -hour or eight-hour CO standards of 20 or 9.0 ppm, respectively. Accordingly, with the steadily decreasing CO emissions from vehicles, even very busy intersections do not result in excee dances of the CO standard. Therefore, the Proj ect would not have the potential to cause or contribute to an exceedance of the California one-hour or eight-hour CO standards of 20 or 9.0 ppm, respectively. Impacts with respect to localized CO concentrations would be less than significant.

Diesel Particulate Matter
Construction would result in the generation of DPM emissions from the use of off -road diesel equipment required for demolition, grading and excavation, building construction, and other construction activities.

The amount to which the receptors are exposed (a function of concentration and duration of exposure) is the primary factor used to determine health risk (i.e., potential exposure to TAC emission levels that exceed applicable standards). Health -related risks associated with diesel- exhaust emissions are primarily linked to long-term exposure and the associated risk of contracting cancer.

In March 2015, OEHHA adopted revised guidelines that update previous guidance by incorporating advances in risk assessment with consideration of infants and children using Age Sensitivity Factors (ASF).

The intent of the OEHHA 2015 guidance is to provide HRA procedures for use in the Air Toxics Hot Spots

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Program or for the permitting of existing, new, or modified stationary sources. As the Project is not part of the Air Toxics Hot Spots Program and is considered an urban infill residential development consisting primarily of mobile and area sources (i.e., non- stationary sources), the OEHHA 2015 guidance is not directly applicable.

The use of diesel -powered construction equipment would be temporary and episodic. The duration of exposure would be short and exhaust from construction equipment dissipates rapidly. Current methodology for conducting health risk assessments is associated w ith long term exposure periods (9, 30, and 70 years). Therefore, short -term construction activities such as the Project would not be expected to generate a significant health risk. Furthermore, the proposed construction area is approximately 2.15 acres.

Generally, construction for projects contained in a site of such size represent less than significant health risks due to limitations of the off -road diesel equipment able to operate. When compared to larger sites, smaller sites such as the Project would gen erally result in reduced DPM emissions, reduced dust - generating ground-disturbance, and reduced duration of construction activities. Furthermore, construction would be subject to and would comply with California regulations limiting the idling of heavy- duty construction equipment to no more than five (5) minutes, which would further reduce nearby sensitive receptors’ exposure to temporary and variable DPM emissions. 28 For these reasons, DPM generated by
construction activities would not expose sensitive receptors to substantial amounts of air toxics and these impacts would be less than significant.

AQ Impact 4 Would the Proposed Project include sources that could create other emissions (such as those leading to odors) adversely affecting a substantial number of people? (Less than Significant).

The SCAQMD CEQA Air Quality Handbook (1993) identifies certain land uses as sources of odors. These land uses include agriculture (farming and livestock), wastewater treatment plants, food processing plants, chemical plants, composting facilities, refineries, landfills, dairies, and fibergla ss molding. The Project would not include any of the land uses that have been identified by the SCAQMD as odor sources.

Construction activities associated with the Project may generate detectable odors from heavy -duty equipment exhaust and architectural coatings. However, construction -related odors would be short -term in nature and cease upon Project completion. In addition, the Project would be required to comply with the California Code of Regulations, Title 13, sections 2449(d)(3) and 2485, which minimizes the idling time of construction equipment either by shutting it off when not in use or by reducing the time of idling to no

28 California Air Resources Board, Frequently Asked Questions Regulation for In-Use Off-Road Diesel-Fueled (Off-Road Regulation), 2014. Available online at:
https://ww2.arb.ca.gov/sites/default/files/classic/msprog/ordiesel/faq/fleetaverage.pdf, accessed August 1, 2025

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more than five minutes. This would reduce the detectable odors from heavy-duty equipment exhaust. The Project would also be required to comply with the SCAQMD Rule 1113 – Architectural Coating, which would minimize odor impacts from ROG emissions during ar chitectural coating. Any odor impacts to existing adjacent land uses would be short-term and not substantial. As such, the Project would not result in other emissions (such as those leading to odors) adversely affecting a substantial number of people.

Impacts would be less than significant.

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5.0 REFERENCES
California Air Pollution Control Officers Association, CalEEMod. Available online at: caleemod.com California Air Resources Board, “CARB Identified Toxic Air Contaminants.” Available online at:
https://ww2.arb.ca.gov/resources/documents/carb-identified-toxic-air-contaminants, accessed March 4, 2026.

California Air Resources Board, “Sensitive Receptor Assessment.” Available online at:
https://ww2.arb.ca.gov/capp-resource-center/community-assessment/sensitive-receptor- assessment, accessed March 4, 2026.

California Air Resources Board, Frequently Asked Questions Regulation for In-Use Off-Road Diesel-Fueled (Off- Road Regulation) , 2014. Available online at:
https://ww2.arb.ca.gov/sites/default/files/classic/msprog/ordiesel/faq/fleetaverage.pdf , accessed March 4, 2026
City of Pasadena, Central District Specific Plan, 2023, available at:
https://www.cityofpasadena.net/planning/wp-content/uploads/sites/30/Central-District-Specific- Plan-2023.pdf?v=1743003354773 , accessed March 4, 2026.

Office of Environmental Health Hazard Assessment and The American Lung Association of California, “Air Pollution and Children’s Health.” Available online at: https://oehha.ca.gov/air/air -pollution- and-childrens-health-fact-sheet-oehha-and-american-lung-association, accessed March 4, 2026.

SCAG, Connect SoCal 2024 RTP/SCS , April 4, 2024. Available online at:
https://scag.ca.gov/sites/default/files/2024-05/23-2987-connect-socal-2024-final-complete- 040424.pdf, accessed March 4, 2026.

SCAQMD, Air Quality Management Plan , December 2022. Available online at:
http://www.aqmd.gov/home/air-quality/clean-air-plans/air-quality-mgt-plan, accessed March 4, 2026.

SCAQMD, Final Localized Significance Threshold Methodology, June 2003, Revised July 2008. Available online at: https://www.aqmd.gov/docs/default-source/ceqa/handbook/localized-significance- thresholds/appendix-c-mass-rate-lst-look-up-tables.pdf?sfvrsn=8e641d61_2, accessed March 4, 2026.

SCAQMD, Guidance Document for Addressing Air Quality Issues in General Plans and Local Planning , May 6, 2005.

SCAQMD, Rule 445 – Wood Burning Devices Local Government, Builder, Contractor, Architect Answers to Frequently Asked Questions (FAQs), October 2019. Available online at:
http://www.aqmd.gov/docs/default-source/rule-book/support-documents/rule-445/detailed-rule- 445-information.pdf., accessed March 4, 2026.

SCAQMD, Sample Construction Scenarios for Projects Less than Five Acres in Size, February 2005, page 1 -3.

5.0 References
Impact Sciences, Inc. 38 600 North Rosemead Boulevard Project 1136.019 Air Quality Technical Report – April 2026
SCAQMD, Sample Construction Scenarios for Projects Less than Five Acres in Size, February 2005, page 1 -3.

SCQMD, White Paper on Regulatory Options for Addressing Cumulative Impacts from Air Pollution Emissions, SCAQMD Board Meeting, September 5, 2003, Agenda No. 29, Appendix D, p. D -3.

South Coast Air Quality Management District, South Coast AQMD Finalizes Most Ambitious Strategy to Cut Pollution, 2022. Available online at: http://www.aqmd.gov/docs/default -source/news- archive/2022/aqmp-adopted-dec2-2022.pdf, accessed March 4, 2026.

APPENDIX A
Air Quality Data
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600 N Rosemead 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

2.2.1. Total Construction Emissions by Y ear, Unmitigated

2.2.2. Onsite Construction Emissions by Y ear, Unmitigated

2.2.3. Offsite Construction Emissions by Y ear, Unmitigated

2.3. Operations Emissions Compared Against Thresholds

2.4. Operations Emissions by Sector, Unmitigated

3. Construction Emissions Details

3.1. Demolition (2026)

3.1.1. Onsite - Unmitigated
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3.1.2. Offsite - Unmitigated

3.2. Grading (2026)

3.2.1. Onsite - Unmitigated

3.2.2. Offsite - Unmitigated

3.3. Building Construction (2026)

3.3.1. Onsite - Unmitigated

3.3.2. Offsite - Unmitigated

3.4. Building Construction (2027)

3.4.1. Onsite - Unmitigated

3.4.2. Offsite - Unmitigated

3.5. Paving (2028)

3.5.1. Onsite - Unmitigated

3.5.2. Offsite - Unmitigated

3.6. Architectural Coating (2027)

3.6.1. Onsite - Unmitigated

3.6.2. Offsite - Unmitigated

3.7. Architectural Coating (2028)

3.7.1. Onsite - Unmitigated
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3.7.2. Offsite - 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

4.7. Offroad Emissions By Equipment Type

4.7.1. Unmitigated

4.8. Stationary Emissions By Equipment Type
600 N Rosemead Custom Report, 3/13/2026
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4.8.1. Unmitigated

4.9. User Defined Emissions By Equipment Type

4.9.1. Unmitigated

4.10. Soil Carbon Accumulation By Vegetation Type

4.10.1. Soil Carbon Accumulation By Vegetation Type - Unmitigated

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

4.10.3. Avoided and Sequestered Emissions by Species - Unmitigated

5. Activity Data

5.1. Construction Schedule

5.2. Off-Road Equipment

5.2.1. Unmitigated

5.3. Construction Vehicles

5.3.1. Unmitigated

5.4. Vehicles

5.4.1. Construction Vehicle Control Strategies

5.5. Architectural Coatings

5.6. Dust Mitigation

5.6.1. Construction Earthmoving Activities
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5.6.2. Construction Earthmoving Control Strategies

5.7. Construction Paving

5.8. Construction Electricity Consumption and Emissions Factors

5.9. Operational Mobile Sources

5.9.1. Unmitigated

5.10. Operational Area Sources

5.10.1. Hearths

5.10.2. Architectural Coatings

5.10.3. Landscape Equipment

5.11. Operational Energy Consumption

5.11.1. Unmitigated

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

5.15. Operational Off-Road Equipment
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5.15.1. Unmitigated

5.16. Stationary Sources

5.16.1. Emergency Generators and Fire Pumps

5.16.2. Process Boilers

5.17. User Defined

5.18. Vegetation

5.18.1. Land Use Change

5.18.1.1. Unmitigated

5.18.1. Biomass Cover Type

5.18.1.1. Unmitigated

5.18.2. Sequestration

5.18.2.1. Unmitigated

8. User Changes to Default Data

8.1. Justifications

8.3. Land Use

8.4. Construction

8.4.1. Construction Phases

8.4.2. Off-Road Equipment
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8.4.6. Trips and VMT

8.5. Operations

8.5.1. Mobile Sources

8.5.1.1. Vehicle Data
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1. Basic Project Information

1.1. Basic Project Information
Data Field Value
Project Name 600 N Rosemead
Construction Start Date 7/1/2026
Operational Y ear 2028
Lead Agency —
Land Use Scale Project/site
Analysis Level for Defaults County
Windspeed (m/s) 0.50000
Precipitation (days) 24.4000
Location 34.15702192545486, -118.07953653068421
County Los Angeles-South Coast
City Pasadena
Air District South Coast AQMD
Air Basin South Coast
TAZ 4936
EDFZ 7
Electric Utility Pasadena Water & Power
Gas Utility Southern California Gas
App Version 2022.1.1.41

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
Apartments Mid
Rise
133.000 Dwelling Unit 2.15000 118,607 15,000.0 — 394.000 — 600 N Rosemead Custom Report, 3/13/2026
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Enclosed Parking
Structure
133.000 Space 1.19700 18,132.0 0.00000 — — —

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. TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 4.21096 4.01148 9.10636 14.8465 0.02868 0.31367 1.76853 1.98954 0.28878 0.42070 0.62434 — 3,631.29 3,631.29 0.15113 0.14323 6.50771 3,684.26 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 4.08818 3.92576 6.81587 11.8694 0.01609 0.22838 1.49829 1.72667 0.20770 0.35736 0.56422 — 3,187.70 3,187.70 0.13637 0.13621 0.16058 3,231.86 Average
Daily
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 2.06223 1.95600 3.52332 7.24337 0.00942 0.11696 0.91460 1.03156 0.10777 0.21745 0.32521 — 1,883.28 1,883.28 0.05464 0.07588 1.47710 1,908.74 Annual
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 0.37636 0.35697 0.64301 1.32192 0.00172 0.02134 0.16692 0.18826 0.01967 0.03968 0.05935 — 311.799 311.799 0.00905 0.01256 0.24455 316.014

2.2. Construction Emissions by Y ear

2.2.1. Total Construction Emissions by Y ear, Unmitigated Includes both onsite and offsite emissions.

Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) 600 N Rosemead Custom Report, 3/13/2026
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Y ear TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily -
Summer
(Max)
— — — — — — — — — — — — — — — — — —
2026 1.19469 0.99598 9.10636 14.8465 0.02868 0.31367 1.49829 1.72667 0.28878 0.35736 0.56422 — 3,359.48 3,359.48 0.14134 0.13621 6.18717 3,383.37 2027 4.21096 4.01148 6.56319 14.6162 0.01782 0.22101 1.76853 1.98954 0.20364 0.42070 0.62434 — 3,631.29 3,631.29 0.15113 0.14323 6.50771 3,684.26 2028 4.08907 3.92666 6.79659 12.2129 0.01468 0.22576 0.53166 0.75743 0.20770 0.12462 0.33232 — 2,014.67 2,014.67 0.06557 0.03132 1.51353 2,027.15 Daily -
Winter
(Max)
— — — — — — — — — — — — — — — — — —
2026 1.10776 0.93156 6.11639 11.7848 0.01609 0.22838 1.49829 1.72667 0.20687 0.35736 0.56422 — 3,187.70 3,187.70 0.13637 0.13621 0.16058 3,231.86 2027 3.14322 3.10916 5.77224 11.3074 0.01609 0.20196 1.49829 1.70025 0.18612 0.35736 0.54347 — 3,151.95 3,151.95 0.09421 0.13235 0.14653 3,193.89 2028 4.08818 3.92576 6.81587 11.8694 0.01468 0.22576 0.53166 0.75743 0.20770 0.12462 0.33232 — 1,987.13 1,987.13 0.06647 0.03132 0.03914 1,998.16 Average
Daily
— — — — — — — — — — — — — — — — — —
2026 0.39749 0.33227 2.48281 4.25724 0.00740 0.08330 0.36921 0.45251 0.07608 0.08328 0.15937 — 1,100.01 1,100.01 0.04678 0.03562 0.57476 1,112.36 2027 2.06223 1.95600 3.52332 7.24337 0.00942 0.11696 0.91460 1.03156 0.10777 0.21745 0.32521 — 1,883.28 1,883.28 0.05464 0.07588 1.47710 1,908.74 2028 0.82304 0.80664 0.60519 1.16754 0.00127 0.01756 0.08147 0.09903 0.01616 0.01908 0.03523 — 200.698 200.698 0.00589 0.00398 0.10193 202.135 Annual — — — — — — — — — — — — — — — — — —
2026 0.07254 0.06064 0.45311 0.77695 0.00135 0.01520 0.06738 0.08258 0.01389 0.01520 0.02908 — 182.118 182.118 0.00774 0.00590 0.09516 184.165 2027 0.37636 0.35697 0.64301 1.32192 0.00172 0.02134 0.16692 0.18826 0.01967 0.03968 0.05935 — 311.799 311.799 0.00905 0.01256 0.24455 316.014 2028 0.15020 0.14721 0.11045 0.21308 0.00023 0.00320 0.01487 0.01807 0.00295 0.00348 0.00643 — 33.2278 33.2278 0.00098 0.00066 0.01688 33.4657

2.2.2. Onsite 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 TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily -
Summer
(Max)
— — — — — — — — — — — — — — — — — —
2026 1.11344 0.93560 8.76111 13.7493 0.02722 0.31102 0.46931 0.66318 0.28614 0.07107 0.28615 — 2,947.16 2,947.16 0.11955 0.02391 0.00000 2,957.28 2027 3.67736 3.55511 5.56939 6.89593 0.01395 0.21715 0.00000 0.21715 0.19977 0.00000 0.19977 — 1,457.20 1,457.20 0.05911 0.01182 0.00000 1,462.20 600 N Rosemead Custom Report, 3/13/2026
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2028 3.93080 3.78767 6.65804 9.91858 0.01468 0.22576 0.00000 0.22576 0.20770 0.00000 0.20770 — 1,483.80 1,483.80 0.06019 0.01204 0.00000 1,488.89 Daily -
Winter
(Max)
— — — — — — — — — — — — — — — — — —
2026 0.64018 0.53793 5.04849 5.79459 0.01223 0.22065 0.00000 0.22065 0.20300 0.00000 0.20300 — 1,323.72 1,323.72 0.05370 0.01074 0.00000 1,328.26 2027 3.06095 3.03715 4.73823 5.77054 0.01223 0.19810 0.00000 0.19810 0.18225 0.00000 0.18225 — 1,323.69 1,323.69 0.05369 0.01074 0.00000 1,328.23 2028 3.93080 3.78767 6.65804 9.91858 0.01468 0.22576 0.00000 0.22576 0.20770 0.00000 0.20770 — 1,483.80 1,483.80 0.06019 0.01204 0.00000 1,488.89 Average
Daily
— — — — — — — — — — — — — — — — — —
2026 0.29837 0.25036 2.21434 2.94217 0.00644 0.08142 0.05658 0.13800 0.07491 0.00857 0.08348 — 685.169 685.169 0.02779 0.00556 0.00000 687.520 2027 1.78492 1.72100 2.92663 3.61806 0.00735 0.11489 0.00000 0.11489 0.10570 0.00000 0.10570 — 770.665 770.665 0.03126 0.00625 0.00000 773.310 2028 0.79868 0.78528 0.58076 0.85002 0.00127 0.01756 0.00000 0.01756 0.01616 0.00000 0.01616 — 121.185 121.185 0.00492 0.00098 0.00000 121.601 Annual — — — — — — — — — — — — — — — — — —
2026 0.05445 0.04569 0.40412 0.53695 0.00117 0.01486 0.01033 0.02519 0.01367 0.00156 0.01523 — 113.437 113.437 0.00460 0.00092 0.00000 113.827 2027 0.32575 0.31408 0.53411 0.66030 0.00134 0.02097 0.00000 0.02097 0.01929 0.00000 0.01929 — 127.592 127.592 0.00518 0.00104 0.00000 128.030 2028 0.14576 0.14331 0.10599 0.15513 0.00023 0.00320 0.00000 0.00320 0.00295 0.00000 0.00295 — 20.0636 20.0636 0.00081 0.00016 0.00000 20.1324

2.2.3. Offsite 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 TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily -
Summer
(Max)
— — — — — — — — — — — — — — — — — —
2026 0.46833 0.39667 0.99199 6.96226 0.00387 0.00773 1.49829 1.50602 0.00387 0.35736 0.36122 — 1,936.52 1,936.52 0.08040 0.12547 6.18717 1,982.11 2027 0.53360 0.45638 0.99380 7.72030 0.00387 0.00387 1.76853 1.77239 0.00387 0.42070 0.42457 — 2,174.10 2,174.10 0.09202 0.13141 6.50771 2,222.06 2028 0.15827 0.13899 0.13855 2.29429 0.00000 0.00000 0.53166 0.53166 0.00000 0.12462 0.12462 — 530.868 530.868 0.00538 0.01928 1.51353 538.262 Daily -
Winter
(Max)
— — — — — — — — — — — — — — — — — —
2026 0.46757 0.39363 1.06790 5.99023 0.00387 0.00773 1.49829 1.50602 0.00387 0.35736 0.36122 — 1,863.98 1,863.98 0.08268 0.12547 0.16058 1,903.60 2027 0.44509 0.37540 1.03401 5.53682 0.00387 0.00387 1.49829 1.50215 0.00387 0.35736 0.36122 — 1,828.27 1,828.27 0.04052 0.12161 0.14653 1,865.67 600 N Rosemead Custom Report, 3/13/2026
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2028 0.15738 0.13810 0.15782 1.95084 0.00000 0.00000 0.53166 0.53166 0.00000 0.12462 0.12462 — 503.330 503.330 0.00628 0.01928 0.03914 509.272 Average
Daily
— — — — — — — — — — — — — — — — — —
2026 0.09911 0.08191 0.26846 1.31507 0.00096 0.00188 0.31263 0.31451 0.00117 0.07472 0.07589 — 414.837 414.837 0.01899 0.03006 0.57476 424.844 2027 0.27732 0.23500 0.59669 3.62532 0.00207 0.00207 0.91460 0.91667 0.00207 0.21745 0.21951 — 1,112.62 1,112.62 0.02338 0.06963 1.47710 1,135.43 2028 0.02436 0.02136 0.02443 0.31752 0.00000 0.00000 0.08147 0.08147 0.00000 0.01908 0.01908 — 79.5129 79.5129 0.00098 0.00300 0.10193 80.5336 Annual — — — — — — — — — — — — — — — — — —
2026 0.01809 0.01495 0.04899 0.24000 0.00018 0.00034 0.05706 0.05740 0.00021 0.01364 0.01385 — 68.6809 68.6809 0.00314 0.00498 0.09516 70.3378 2027 0.05061 0.04289 0.10890 0.66162 0.00038 0.00038 0.16692 0.16729 0.00038 0.03968 0.04006 — 184.207 184.207 0.00387 0.01153 0.24455 187.984 2028 0.00445 0.00390 0.00446 0.05795 0.00000 0.00000 0.01487 0.01487 0.00000 0.00348 0.00348 — 13.1643 13.1643 0.00016 0.00050 0.01688 13.3333

2.3. Operations Emissions Compared Against Thresholds
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Un/Mit. TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 5.23024 5.01647 1.46738 20.6643 0.03283 0.05309 2.87649 2.92958 0.05063 0.73060 0.78123 62.5468 5,223.43 5,285.98 6.51534 0.15008 9.36570 5,502.95 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 4.38060 4.21282 1.48420 11.3834 0.03119 0.04817 2.87649 2.92466 0.04692 0.73060 0.77752 62.5468 5,072.36 5,134.91 6.52040 0.15583 1.07027 5,345.42 Average
Daily
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 4.94083 4.74061 1.54725 17.3865 0.03179 0.05154 2.83158 2.88311 0.04946 0.71938 0.76884 62.5468 5,122.79 5,185.34 6.52001 0.15628 4.52670 5,399.44 Annual
(Max)
— — — — — — — — — — — — — — — — — —
Unmit. 0.90170 0.86516 0.28237 3.17304 0.00580 0.00941 0.51676 0.52617 0.00903 0.13129 0.14031 10.3553 848.137 858.492 1.07946 0.02587 0.74945 893.939 600 N Rosemead Custom Report, 3/13/2026
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2.4. Operations Emissions by Sector, Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Sector TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Mobile 1.59877 1.45450 1.01632 12.1582 0.03008 0.01800 2.87649 2.89449 0.01675 0.73060 0.74736 — 3,076.46 3,076.46 0.14352 0.11943 8.51623 3,124.15 Area 3.58782 3.54014 0.07809 8.34740 0.00037 0.00493 — 0.00493 0.00372 — 0.00372 — 23.4173 23.4173 0.00098 0.00020 — 23.4999 Energy 0.04365 0.02182 0.37297 0.15871 0.00238 0.03016 — 0.03016 0.03016 — 0.03016 — 2,024.71 2,024.71 0.09172 0.00693 — 2,029.07 Water — — — — — — — — — — — 9.49958 98.8443 108.344 0.97725 0.02353 — 139.787 Waste — — — — — — — — — — — 53.0472 0.00000 53.0472 5.30188 0.00000 — 185.594 Refrig. — — — — — — — — — — — — — — — — 0.84946 0.84946 Total 5.23024 5.01647 1.46738 20.6643 0.03283 0.05309 2.87649 2.92958 0.05063 0.73060 0.78123 62.5468 5,223.43 5,285.98 6.51534 0.15008 9.36570 5,502.95 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Mobile 1.58399 1.43804 1.11123 11.2247 0.02881 0.01801 2.87649 2.89450 0.01676 0.73060 0.74737 — 2,948.80 2,948.80 0.14956 0.12537 0.22081 2,990.12 Area 2.75296 2.75296 — — — — — — — — — — — — — — — —
Energy 0.04365 0.02182 0.37297 0.15871 0.00238 0.03016 — 0.03016 0.03016 — 0.03016 — 2,024.71 2,024.71 0.09172 0.00693 — 2,029.07 Water — — — — — — — — — — — 9.49958 98.8443 108.344 0.97725 0.02353 — 139.787 Waste — — — — — — — — — — — 53.0472 0.00000 53.0472 5.30188 0.00000 — 185.594 Refrig. — — — — — — — — — — — — — — — — 0.84946 0.84946 Total 4.38060 4.21282 1.48420 11.3834 0.03119 0.04817 2.87649 2.92466 0.04692 0.73060 0.77752 62.5468 5,072.36 5,134.91 6.52040 0.15583 1.07027 5,345.42 Average
Daily
— — — — — — — — — — — — — — — — — —
Mobile 1.57240 1.42666 1.12080 11.5104 0.02915 0.01800 2.83158 2.84958 0.01676 0.71938 0.73613 — 2,983.20 2,983.20 0.14850 0.12569 3.67724 3,028.04 Area 3.32479 3.29212 0.05349 5.71739 0.00026 0.00338 — 0.00338 0.00255 — 0.00255 — 16.0392 16.0392 0.00067 0.00013 — 16.0958 Energy 0.04365 0.02182 0.37297 0.15871 0.00238 0.03016 — 0.03016 0.03016 — 0.03016 — 2,024.71 2,024.71 0.09172 0.00693 — 2,029.07 Water — — — — — — — — — — — 9.49958 98.8443 108.344 0.97725 0.02353 — 139.787 Waste — — — — — — — — — — — 53.0472 0.00000 53.0472 5.30188 0.00000 — 185.594 600 N Rosemead Custom Report, 3/13/2026
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Refrig. — — — — — — — — — — — — — — — — 0.84946 0.84946 Total 4.94083 4.74061 1.54725 17.3865 0.03179 0.05154 2.83158 2.88311 0.04946 0.71938 0.76884 62.5468 5,122.79 5,185.34 6.52001 0.15628 4.52670 5,399.44 Annual — — — — — — — — — — — — — — — — — —
Mobile 0.28696 0.26037 0.20455 2.10065 0.00532 0.00329 0.51676 0.52005 0.00306 0.13129 0.13434 — 493.902 493.902 0.02459 0.02081 0.60881 501.327 Area 0.60677 0.60081 0.00976 1.04342 0.00005 0.00062 — 0.00062 0.00047 — 0.00047 — 2.65547 2.65547 0.00011 0.00002 — 2.66485 Energy 0.00797 0.00398 0.06807 0.02896 0.00043 0.00550 — 0.00550 0.00550 — 0.00550 — 335.214 335.214 0.01518 0.00115 — 335.936 Water — — — — — — — — — — — 1.57276 16.3648 17.9376 0.16179 0.00390 — 23.1433 Waste — — — — — — — — — — — 8.78257 0.00000 8.78257 0.87779 0.00000 — 30.7272 Refrig. — — — — — — — — — — — — — — — — 0.14064 0.14064 Total 0.90170 0.86516 0.28237 3.17304 0.00580 0.00941 0.51676 0.52617 0.00903 0.13129 0.14031 10.3553 848.137 858.492 1.07946 0.02587 0.74945 893.939

3. Construction Emissions Details

3.1. Demolition (2026)

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

0.97723 0.81821 6.56564 9.09612 0.02195 0.19387 — 0.19387 0.17836 — 0.17836 — 2,278.71 2,278.71 0.09243 0.01849 — 2,286.53 Demoliti
on
— — — — — — 0.46931 0.46931 — 0.07107 0.07107 — — — — — — — Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
600 N Rosemead Custom Report, 3/13/2026
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Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.11780 0.09863 0.79147 1.09652 0.00265 0.02337 — 0.02337 0.02150 — 0.02150 — 274.694 274.694 0.01114 0.00223 — 275.637 Demoliti
on
— — — — — — 0.05657 0.05657 — 0.00857 0.00857 — — — — — — — Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Annual — — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.02150 0.01800 0.14444 0.20011 0.00048 0.00427 — 0.00427 0.00392 — 0.00392 — 45.4787 45.4787 0.00184 0.00037 — 45.6348 Demoliti
on
— — — — — — 0.01032 0.01032 — 0.00156 0.00156 — — — — — — — Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000

3.1.2. Offsite - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.06234 0.05523 0.05820 0.96877 0.00000 0.00000 0.19606 0.19606 0.00000 0.04596 0.04596 — 203.230 203.230 0.00843 0.00711 0.68763 206.247 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.01892 0.00516 0.28704 0.12844 0.00146 0.00265 0.05562 0.05827 0.00265 0.01523 0.01787 — 209.083 209.083 0.01336 0.03347 0.45776 219.848 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Average
Daily
— — — — — — — — — — — — — — — — — —
600 N Rosemead Custom Report, 3/13/2026
16 / 49
Worker 0.00747 0.00658 0.00857 0.10431 0.00000 0.00000 0.02326 0.02326 0.00000 0.00545 0.00545 — 23.5680 23.5680 0.00106 0.00086 0.03586 23.8857 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00225 0.00061 0.03624 0.01558 0.00018 0.00032 0.00662 0.00694 0.00032 0.00182 0.00213 — 25.2132 25.2132 0.00161 0.00403 0.02371 26.4794 Annual — — — — — — — — — — — — — — — — — —
Worker 0.00136 0.00120 0.00156 0.01904 0.00000 0.00000 0.00425 0.00425 0.00000 0.00099 0.00099 — 3.90195 3.90195 0.00017 0.00014 0.00594 3.95455 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00041 0.00011 0.00661 0.00284 0.00003 0.00006 0.00121 0.00127 0.00006 0.00033 0.00039 — 4.17434 4.17434 0.00027 0.00067 0.00393 4.38397

3.2. Grading (2026)

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

1.11344 0.93560 8.76111 13.7493 0.02722 0.31102 — 0.31102 0.28614 — 0.28614 — 2,947.16 2,947.16 0.11955 0.02391 — 2,957.28 Dust
From
Material
Movement
— — — — — — 0.00006 0.00006 — 0.00001 0.00001 — — — — — — — Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Average
Daily
— — — — — — — — — — — — — — — — — —
600 N Rosemead Custom Report, 3/13/2026
17 / 49
170.145—0.001380.00688169.563169.563—0.01646—0.016460.01789—0.017890.001570.791060.504060.053830.06406Off-Roa d
Equipm
ent
Dust
From
Material
Movement
— — — — — — <

0.000005
<

0.000005
— <

0.000005
<

0.000005
— — — — — — —
Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Annual — — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.01169 0.00982 0.09199 0.14437 0.00029 0.00327 — 0.00327 0.00300 — 0.00300 — 28.0731 28.0731 0.00114 0.00023 — 28.1694 Dust
From
Material
Movement
— — — — — — <

0.000005
<

0.000005
— <

0.000005
<

0.000005
— — — — — — —
Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000

3.2.2. Offsite - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.06234 0.05523 0.05820 0.96877 0.00000 0.00000 0.19606 0.19606 0.00000 0.04596 0.04596 — 203.230 203.230 0.00843 0.00711 0.68763 206.247 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.01892 0.00516 0.28704 0.12844 0.00146 0.00265 0.05562 0.05827 0.00265 0.01523 0.01787 — 209.083 209.083 0.01336 0.03347 0.45776 219.848 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
600 N Rosemead Custom Report, 3/13/2026
18 / 49
——————————————————Average
Daily
Worker 0.00357 0.00314 0.00409 0.04978 0.00000 0.00000 0.01110 0.01110 0.00000 0.00260 0.00260 — 11.2484 11.2484 0.00050 0.00041 0.01711 11.4000 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00107 0.00029 0.01730 0.00744 0.00008 0.00015 0.00316 0.00331 0.00015 0.00087 0.00102 — 12.0336 12.0336 0.00077 0.00193 0.01132 12.6379 Annual — — — — — — — — — — — — — — — — — —
Worker 0.00065 0.00057 0.00075 0.00909 0.00000 0.00000 0.00203 0.00203 0.00000 0.00047 0.00047 — 1.86229 1.86229 0.00008 0.00007 0.00283 1.88740 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00020 0.00005 0.00316 0.00136 0.00002 0.00003 0.00058 0.00060 0.00003 0.00016 0.00019 — 1.99230 1.99230 0.00013 0.00032 0.00187 2.09235

3.3. Building Construction (2026)

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

0.64018 0.53793 5.04849 5.79459 0.01223 0.22065 — 0.22065 0.20300 — 0.20300 — 1,323.72 1,323.72 0.05370 0.01074 — 1,328.26 Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.64018 0.53793 5.04849 5.79459 0.01223 0.22065 — 0.22065 0.20300 — 0.20300 — 1,323.72 1,323.72 0.05370 0.01074 — 1,328.26 Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 600 N Rosemead Custom Report, 3/13/2026
19 / 49
Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.11651 0.09790 0.91881 1.05459 0.00222 0.04016 — 0.04016 0.03695 — 0.03695 — 240.912 240.912 0.00977 0.00195 — 241.738 Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Annual — — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.02126 0.01787 0.16768 0.19246 0.00041 0.00733 — 0.00733 0.00674 — 0.00674 — 39.8857 39.8857 0.00162 0.00032 — 40.0226 Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000

3.3.2. Offsite - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.42960 0.38060 0.40111 6.67644 0.00000 0.00000 1.35121 1.35121 0.00000 0.31672 0.31672 — 1,400.60 1,400.60 0.05812 0.04900 4.73895 1,421.39 Vendor 0.03873 0.01607 0.59088 0.28581 0.00387 0.00773 0.14707 0.15480 0.00387 0.04063 0.04450 — 535.921 535.921 0.02228 0.07648 1.44822 560.716 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.42960 0.37832 0.45011 5.69760 0.00000 0.00000 1.35121 1.35121 0.00000 0.31672 0.31672 — 1,327.78 1,327.78 0.06039 0.04900 0.12300 1,344.02 Vendor 0.03797 0.01531 0.61779 0.29264 0.00387 0.00773 0.14707 0.15480 0.00387 0.04063 0.04450 — 536.194 536.194 0.02228 0.07648 0.03759 559.578 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Average
Daily
— — — — — — — — — — — — — — — — — —
600 N Rosemead Custom Report, 3/13/2026
20 / 49
Worker 0.07777 0.06844 0.08918 1.08526 0.00000 0.00000 0.24206 0.24206 0.00000 0.05668 0.05668 — 245.217 245.217 0.01099 0.00892 0.37308 248.523 Vendor 0.00698 0.00286 0.11308 0.05271 0.00070 0.00141 0.02641 0.02782 0.00070 0.00731 0.00801 — 97.5561 97.5561 0.00406 0.01392 0.11368 101.919 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Annual — — — — — — — — — — — — — — — — — —
Worker 0.01419 0.01249 0.01627 0.19806 0.00000 0.00000 0.04418 0.04418 0.00000 0.01034 0.01034 — 40.5985 40.5985 0.00182 0.00148 0.06177 41.1458 Vendor 0.00127 0.00052 0.02064 0.00962 0.00013 0.00026 0.00482 0.00508 0.00013 0.00133 0.00146 — 16.1515 16.1515 0.00067 0.00230 0.01882 16.8738 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000

3.4. Building Construction (2027)

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

0.61641 0.51796 4.73823 5.77054 0.01223 0.19810 — 0.19810 0.18225 — 0.18225 — 1,323.69 1,323.69 0.05369 0.01074 — 1,328.23 Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.61641 0.51796 4.73823 5.77054 0.01223 0.19810 — 0.19810 0.18225 — 0.18225 — 1,323.69 1,323.69 0.05369 0.01074 — 1,328.23 Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Average
Daily
— — — — — — — — — — — — — — — — — —
600 N Rosemead Custom Report, 3/13/2026
21 / 49
Off-Roa
Equipment

0.32932 0.27672 2.53138 3.08289 0.00653 0.10583 — 0.10583 0.09737 — 0.09737 — 707.175 707.175 0.02869 0.00574 — 709.602 Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Annual — — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.06010 0.05050 0.46198 0.56263 0.00119 0.01931 — 0.01931 0.01777 — 0.01777 — 117.081 117.081 0.00475 0.00095 — 117.483 Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000

3.4.2. Offsite - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.41592 0.36693 0.35667 6.20924 0.00000 0.00000 1.35121 1.35121 0.00000 0.31672 0.31672 — 1,373.79 1,373.79 0.05812 0.04900 4.28073 1,394.12 Vendor 0.03449 0.01607 0.56579 0.26922 0.00387 0.00387 0.14707 0.15094 0.00387 0.04063 0.04450 — 525.548 525.548 0.02228 0.07261 1.37084 549.114 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.41137 0.36009 0.44555 5.26116 0.00000 0.00000 1.35121 1.35121 0.00000 0.31672 0.31672 — 1,302.43 1,302.43 0.01823 0.04900 0.11094 1,317.60 Vendor 0.03373 0.01531 0.58846 0.27566 0.00387 0.00387 0.14707 0.15094 0.00387 0.04063 0.04450 — 525.838 525.838 0.02228 0.07261 0.03560 548.068 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker 0.21977 0.19238 0.23803 2.95382 0.00000 0.00000 0.71057 0.71057 0.00000 0.16638 0.16638 — 706.084 706.084 0.00974 0.02618 0.98565 715.115 Vendor 0.01842 0.00838 0.31628 0.14565 0.00207 0.00207 0.07754 0.07960 0.00207 0.02145 0.02351 — 280.837 280.837 0.01190 0.03879 0.31598 293.010 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 600 N Rosemead Custom Report, 3/13/2026
22 / 49
Annual — — — — — — — — — — — — — — — — — —
Worker 0.04011 0.03511 0.04344 0.53907 0.00000 0.00000 0.12968 0.12968 0.00000 0.03036 0.03036 — 116.900 116.900 0.00161 0.00433 0.16319 118.395 Vendor 0.00336 0.00153 0.05772 0.02658 0.00038 0.00038 0.01415 0.01453 0.00038 0.00391 0.00429 — 46.4957 46.4957 0.00197 0.00642 0.05231 48.5112 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000

3.5. Paving (2028)

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

0.74648 0.62588 5.84990 8.80025 0.01296 0.21041 — 0.21041 0.19358 — 0.19358 — 1,350.28 1,350.28 0.05477 0.01095 — 1,354.92 Paving 0.13067 0.13067 — — — — — — — — — — — — — — — —
Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.74648 0.62588 5.84990 8.80025 0.01296 0.21041 — 0.21041 0.19358 — 0.19358 — 1,350.28 1,350.28 0.05477 0.01095 — 1,354.92 Paving 0.13067 0.13067 — — — — — — — — — — — — — — — —
Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Average
Daily
— — — — — — — — — — — — — — — — — —
600 N Rosemead Custom Report, 3/13/2026
23 / 49

89.0903—0.000720.0036088.785688.7856—0.01273—0.012730.01384—0.013840.000850.578650.384650.041150.04908Off-Roa d
Equipm
Paving 0.00859 0.00859 — — — — — — — — — — — — — — — —
Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Annual — — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.00896 0.00751 0.07020 0.10560 0.00016 0.00252 — 0.00252 0.00232 — 0.00232 — 14.6995 14.6995 0.00060 0.00012 — 14.7499 Paving 0.00157 0.00157 — — — — — — — — — — — — — — — —
Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000

3.5.2. Offsite - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.07782 0.06834 0.06812 1.12811 0.00000 0.00000 0.26142 0.26142 0.00000 0.06128 0.06128 — 261.029 261.029 0.00265 0.00948 0.74421 264.664 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.07738 0.06790 0.07760 0.95923 0.00000 0.00000 0.26142 0.26142 0.00000 0.06128 0.06128 — 247.488 247.488 0.00309 0.00948 0.01925 250.410 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker 0.00506 0.00444 0.00507 0.06594 0.00000 0.00000 0.01692 0.01692 0.00000 0.00396 0.00396 — 16.5134 16.5134 0.00020 0.00062 0.02117 16.7254 600 N Rosemead Custom Report, 3/13/2026
24 / 49
Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Annual — — — — — — — — — — — — — — — — — —
Worker 0.00092 0.00081 0.00093 0.01203 0.00000 0.00000 0.00309 0.00309 0.00000 0.00072 0.00072 — 2.73398 2.73398 0.00003 0.00010 0.00350 2.76908 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000

3.6. Architectural Coating (2027)

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

0.13715 0.11335 0.83116 1.12539 0.00173 0.01905 — 0.01905 0.01752 — 0.01752 — 133.513 133.513 0.00542 0.00108 — 133.971 Architect
ural
Coating
s

2.92380 2.92380 — — — — — — — — — — — — — — — —
Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.13715 0.11335 0.83116 1.12539 0.00173 0.01905 — 0.01905 0.01752 — 0.01752 — 133.513 133.513 0.00542 0.00108 — 133.971 600 N Rosemead Custom Report, 3/13/2026
25 / 49
————————————————2.923802.92380Architect
ural
Coating
Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.06522 0.05390 0.39525 0.53517 0.00082 0.00906 — 0.00906 0.00833 — 0.00833 — 63.4904 63.4904 0.00258 0.00052 — 63.7083 Architect
ural
Coating
s

1.39038 1.39038 — — — — — — — — — — — — — — — —
Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Annual — — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.01190 0.00984 0.07213 0.09767 0.00015 0.00165 — 0.00165 0.00152 — 0.00152 — 10.5116 10.5116 0.00043 0.00009 — 10.5476 Architect
ural
Coating
s

0.25374 0.25374 — — — — — — — — — — — — — — — —
Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000

3.6.2. Offsite - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.08318 0.07339 0.07133 1.24185 0.00000 0.00000 0.27024 0.27024 0.00000 0.06334 0.06334 — 274.758 274.758 0.01162 0.00980 0.85615 278.825 600 N Rosemead Custom Report, 3/13/2026
26 / 49
Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.08227 0.07202 0.08911 1.05223 0.00000 0.00000 0.27024 0.27024 0.00000 0.06334 0.06334 — 260.486 260.486 0.00365 0.00980 0.02219 263.520 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker 0.03912 0.03425 0.04238 0.52585 0.00000 0.00000 0.12650 0.12650 0.00000 0.02962 0.02962 — 125.699 125.699 0.00173 0.00466 0.17547 127.306 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Annual — — — — — — — — — — — — — — — — — —
Worker 0.00714 0.00625 0.00773 0.09597 0.00000 0.00000 0.02309 0.02309 0.00000 0.00541 0.00541 — 20.8108 20.8108 0.00029 0.00077 0.02905 21.0770 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000

3.7. Architectural Coating (2028)

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

0.12985 0.10731 0.80814 1.11833 0.00173 0.01536 — 0.01536 0.01413 — 0.01413 — 133.517 133.517 0.00542 0.00108 — 133.975 600 N Rosemead Custom Report, 3/13/2026
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————————————————2.923802.92380Architect
ural
Coating
Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.12985 0.10731 0.80814 1.11833 0.00173 0.01536 — 0.01536 0.01413 — 0.01413 — 133.517 133.517 0.00542 0.00108 — 133.975 Architect
ural
Coating
s

2.92380 2.92380 — — — — — — — — — — — — — — — —
Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Average
Daily
— — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.03151 0.02604 0.19610 0.27138 0.00042 0.00373 — 0.00373 0.00343 — 0.00343 — 32.3994 32.3994 0.00131 0.00026 — 32.5106 Architect
ural
Coating
s

0.70949 0.70949 — — — — — — — — — — — — — — — —
Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Annual — — — — — — — — — — — — — — — — — —
Off-Roa
d
Equipm
ent

0.00575 0.00475 0.03579 0.04953 0.00008 0.00068 — 0.00068 0.00063 — 0.00063 — 5.36410 5.36410 0.00022 0.00004 — 5.38250 600 N Rosemead Custom Report, 3/13/2026
28 / 49
————————————————0.129480.12948Architect
ural
Coating
s
Onsite
truck

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000

3.7.2. Offsite - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Location TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.08045 0.07065 0.07042 1.16618 0.00000 0.00000 0.27024 0.27024 0.00000 0.06334 0.06334 — 269.839 269.839 0.00273 0.00980 0.76933 273.598 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Worker 0.07999 0.07019 0.08022 0.99161 0.00000 0.00000 0.27024 0.27024 0.00000 0.06334 0.06334 — 255.842 255.842 0.00319 0.00980 0.01990 258.862 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Average
Daily
— — — — — — — — — — — — — — — — — —
Worker 0.01930 0.01692 0.01936 0.25158 0.00000 0.00000 0.06455 0.06455 0.00000 0.01511 0.01511 — 62.9995 62.9995 0.00077 0.00238 0.08076 63.8082 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Annual — — — — — — — — — — — — — — — — — —
Worker 0.00352 0.00309 0.00353 0.04591 0.00000 0.00000 0.01178 0.01178 0.00000 0.00276 0.00276 — 10.4303 10.4303 0.00013 0.00039 0.01337 10.5642 Vendor 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Hauling 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 600 N Rosemead Custom Report, 3/13/2026
29 / 49

4. Operations Emissions Details

4.1. Mobile Emissions by Land Use

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

1.59877 1.45450 1.01632 12.1582 0.03008 0.01800 2.87649 2.89449 0.01675 0.73060 0.74736 — 3,076.46 3,076.46 0.14352 0.11943 8.51623 3,124.15 Enclose
d
Parking
Structure

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Total 1.59877 1.45450 1.01632 12.1582 0.03008 0.01800 2.87649 2.89449 0.01675 0.73060 0.74736 — 3,076.46 3,076.46 0.14352 0.11943 8.51623 3,124.15 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise

1.58399 1.43804 1.11123 11.2247 0.02881 0.01801 2.87649 2.89450 0.01676 0.73060 0.74737 — 2,948.80 2,948.80 0.14956 0.12537 0.22081 2,990.12 Enclose
d
Parking
Structure

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Total 1.58399 1.43804 1.11123 11.2247 0.02881 0.01801 2.87649 2.89450 0.01676 0.73060 0.74737 — 2,948.80 2,948.80 0.14956 0.12537 0.22081 2,990.12 Annual — — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise

0.28696 0.26037 0.20455 2.10065 0.00532 0.00329 0.51676 0.52005 0.00306 0.13129 0.13434 — 493.902 493.902 0.02459 0.02081 0.60881 501.327 600 N Rosemead Custom Report, 3/13/2026
30 / 49
Enclose
Parking
Structure

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 Total 0.28696 0.26037 0.20455 2.10065 0.00532 0.00329 0.51676 0.52005 0.00306 0.13129 0.13434 — 493.902 493.902 0.02459 0.02081 0.60881 501.327

4.2. Energy

4.2.1. Electricity Emissions By Land Use - Unmitigated
Criteria Pollutants (lb/day for daily, ton/yr for annual) and GHGs (lb/day for daily, MT/yr for annual) Land
Use
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — — 1,372.56 1,372.56 0.04408 0.00534 — 1,375.25 Enclose
d
Parking
Structure
— — — — — — — — — — — — 178.730 178.730 0.00574 0.00070 — 179.081 Total — — — — — — — — — — — — 1,551.29 1,551.29 0.04982 0.00604 — 1,554.33 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — — 1,372.56 1,372.56 0.04408 0.00534 — 1,375.25 Enclose
d
Parking
Structure
— — — — — — — — — — — — 178.730 178.730 0.00574 0.00070 — 179.081 Total — — — — — — — — — — — — 1,551.29 1,551.29 0.04982 0.00604 — 1,554.33 Annual — — — — — — — — — — — — — — — — — —
600 N Rosemead Custom Report, 3/13/2026
31 / 49
227.689—0.000880.00730227.243227.243————————————Apartme nts
Enclose
d
Parking
Structure
— — — — — — — — — — — — 29.5908 29.5908 0.00095 0.00012 — 29.6489 Total — — — — — — — — — — — — 256.833 256.833 0.00825 0.00100 — 257.337

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

0.04365 0.02182 0.37297 0.15871 0.00238 0.03016 — 0.03016 0.03016 — 0.03016 — 473.424 473.424 0.04190 0.00089 — 474.737 Enclose
d
Parking
Structure

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 — 0.00000 — 0.00000 0.00000 0.00000 0.00000 — 0.00000 Total 0.04365 0.02182 0.37297 0.15871 0.00238 0.03016 — 0.03016 0.03016 — 0.03016 — 473.424 473.424 0.04190 0.00089 — 474.737 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise

0.04365 0.02182 0.37297 0.15871 0.00238 0.03016 — 0.03016 0.03016 — 0.03016 — 473.424 473.424 0.04190 0.00089 — 474.737 Enclose
d
Parking
Structure

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 — 0.00000 — 0.00000 0.00000 0.00000 0.00000 — 0.00000 Total 0.04365 0.02182 0.37297 0.15871 0.00238 0.03016 — 0.03016 0.03016 — 0.03016 — 473.424 473.424 0.04190 0.00089 — 474.737 Annual — — — — — — — — — — — — — — — — — —
600 N Rosemead Custom Report, 3/13/2026
32 / 49
Apartme
Mid Rise

0.00797 0.00398 0.06807 0.02896 0.00043 0.00550 — 0.00550 0.00550 — 0.00550 — 78.3808 78.3808 0.00694 0.00015 — 78.5982 Enclose
d
Parking
Structure

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 0.00000 — 0.00000 — 0.00000 0.00000 0.00000 0.00000 — 0.00000 Total 0.00797 0.00398 0.06807 0.02896 0.00043 0.00550 — 0.00550 0.00550 — 0.00550 — 78.3808 78.3808 0.00694 0.00015 — 78.5982

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 TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Consum
er
Product
s

2.54229 2.54229 — — — — — — — — — — — — — — — —
Architect
ural
Coating
s

0.21067 0.21067 — — — — — — — — — — — — — — — —
Landsca
pe
Equipm
ent

0.83486 0.78717 0.07809 8.34740 0.00037 0.00493 — 0.00493 0.00372 — 0.00372 — 23.4173 23.4173 0.00098 0.00020 — 23.4999 Total 3.58782 3.54014 0.07809 8.34740 0.00037 0.00493 — 0.00493 0.00372 — 0.00372 — 23.4173 23.4173 0.00098 0.00020 — 23.4999 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Consum
er
Product
s

2.54229 2.54229 — — — — — — — — — — — — — — — —
600 N Rosemead Custom Report, 3/13/2026
33 / 49
Architect
Coatings

0.21067 0.21067 — — — — — — — — — — — — — — — —
Total 2.75296 2.75296 — — — — — — — — — — — — — — — —
Annual — — — — — — — — — — — — — — — — — —
Consum
er
Product
s

0.46397 0.46397 — — — — — — — — — — — — — — — —
Architect
ural
Coating
s

0.03845 0.03845 — — — — — — — — — — — — — — — —
Landsca
pe
Equipm
ent

0.10436 0.09840 0.00976 1.04342 0.00005 0.00062 — 0.00062 0.00047 — 0.00047 — 2.65547 2.65547 0.00011 0.00002 — 2.66485 Total 0.60677 0.60081 0.00976 1.04342 0.00005 0.00062 — 0.00062 0.00047 — 0.00047 — 2.65547 2.65547 0.00011 0.00002 — 2.66485

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
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — 9.49958 98.8443 108.344 0.97725 0.02353 — 139.787 Enclose
d
Parking
Structure
— — — — — — — — — — — 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 Total — — — — — — — — — — — 9.49958 98.8443 108.344 0.97725 0.02353 — 139.787 600 N Rosemead Custom Report, 3/13/2026
34 / 49
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — 9.49958 98.8443 108.344 0.97725 0.02353 — 139.787 Enclose
d
Parking
Structure
— — — — — — — — — — — 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 Total — — — — — — — — — — — 9.49958 98.8443 108.344 0.97725 0.02353 — 139.787 Annual — — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — 1.57276 16.3648 17.9376 0.16179 0.00390 — 23.1433 Enclose
d
Parking
Structure
— — — — — — — — — — — 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 Total — — — — — — — — — — — 1.57276 16.3648 17.9376 0.16179 0.00390 — 23.1433

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
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — 53.0472 0.00000 53.0472 5.30188 0.00000 — 185.594 600 N Rosemead Custom Report, 3/13/2026
35 / 49

0.00000—0.000000.000000.000000.000000.00000———————————Enclose d
Parking
Structure
Total — — — — — — — — — — — 53.0472 0.00000 53.0472 5.30188 0.00000 — 185.594 Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — 53.0472 0.00000 53.0472 5.30188 0.00000 — 185.594 Enclose
d
Parking
Structure
— — — — — — — — — — — 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 Total — — — — — — — — — — — 53.0472 0.00000 53.0472 5.30188 0.00000 — 185.594 Annual — — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — 8.78257 0.00000 8.78257 0.87779 0.00000 — 30.7272 Enclose
d
Parking
Structure
— — — — — — — — — — — 0.00000 0.00000 0.00000 0.00000 0.00000 — 0.00000 Total — — — — — — — — — — — 8.78257 0.00000 8.78257 0.87779 0.00000 — 30.7272

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
TOG ROG NOx CO SO2 PM10E PM10D PM10T PM2.5E PM2.5D PM2.5T BCO2 NBCO2 CO2T CH4 N2O R CO2e Daily,
Summer
(Max)
— — — — — — — — — — — — — — — — — —
600 N Rosemead Custom Report, 3/13/2026
36 / 49
Apartme
Mid Rise
— — — — — — — — — — — — — — — — 0.84946 0.84946
Total — — — — — — — — — — — — — — — — 0.84946 0.84946
Daily,
Winter
(Max)
— — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — — — — — — 0.84946 0.84946
Total — — — — — — — — — — — — — — — — 0.84946 0.84946
Annual — — — — — — — — — — — — — — — — — —
Apartme
nts
Mid Rise
— — — — — — — — — — — — — — — — 0.14064 0.14064
Total — — — — — — — — — — — — — — — — 0.14064 0.14064

4.7. Offroad Emissions By Equipment Type

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

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

4.9. User Defined Emissions By Equipment Type

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

4.10. Soil Carbon Accumulation By Vegetation Type

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

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

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

5. Activity Data

5.1. Construction Schedule
Phase Name Phase Type Start Date End Date Days Per Week Work Days per Phase Phase Description Demolition Demolition 7/1/2026 8/31/2026 5.00000 44.0000 — Grading Grading 9/1/2026 9/29/2026 5.00000 21.0000 —
Building Construction Building Construction 9/30/2026 9/30/2027 5.00000 262.000 — Paving Paving 3/31/2028 5/3/2028 5.00000 24.0000 —
Architectural Coating Architectural Coating 5/3/2027 5/3/2028 5.00000 263.000 —

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 Demolition Concrete/Industrial
Saws
Diesel Average 1.000000 8.00000 33.0000 0.73000
Demolition Excavators Diesel Average 1.000000 8.00000 367.000 0.40000 Demolition Skid Steer Loaders Diesel Average 1.000000 8.00000 71.0000 0.37000 Demolition Excavators Diesel Average 3.00000 8.00000 36.0000 0.38000 600 N Rosemead Custom Report, 3/13/2026
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Grading Excavators Diesel Average 1.000000 8.00000 148.000 0.41000 Grading Rollers Diesel Average 1.000000 8.00000 367.000 0.40000 Grading Tractors/Loaders/Back
hoes
Diesel Average 3.00000 8.00000 84.0000 0.37000
Grading Excavators Diesel Average 1.000000 8.00000 36.0000 0.38000 Building Construction Cranes Diesel Average 1.000000 7.00000 367.000 0.29000 Building Construction Forklifts Diesel Average 3.00000 8.00000 82.0000 0.20000 Paving Cement and Mortar
Mixers
Diesel Average 2.00000 6.00000 10.00000 0.56000
Paving Pavers Diesel Average 1.000000 8.00000 81.0000 0.42000 Paving Paving Equipment Diesel Average 2.00000 6.00000 89.0000 0.36000 Paving Rollers Diesel Average 2.00000 6.00000 36.0000 0.38000 Paving Tractors/Loaders/Back
hoes
Diesel Average 1.000000 8.00000 84.0000 0.37000
Architectural Coating Air Compressors Diesel Average 1.000000 6.00000 37.0000 0.48000

5.3. Construction Vehicles

5.3.1. Unmitigated
Phase Name Trip Type One-Way Trips per Day Miles per Trip Vehicle Mix Demolition Worker 15.0000 18.5000 LDA,LDT1,LDT2
Demolition Vendor — 10.2000 HHDT,MHDT
Demolition Hauling 6.00000 10.00000 HHDT
Demolition Onsite truck — — HHDT
Grading Worker 15.0000 18.5000 LDA,LDT1,LDT2
Grading Vendor — 10.2000 HHDT,MHDT
Grading Hauling 6.00000 10.00000 HHDT
Grading Onsite truck — — HHDT
Building Construction Worker 103.375 18.5000 LDA,LDT1,LDT2 600 N Rosemead Custom Report, 3/13/2026
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Building Construction Vendor 17.1895 10.2000 HHDT,MHDT
Building Construction Hauling 0.00000 20.0000 HHDT
Building Construction Onsite truck — — HHDT
Paving Worker 20.0000 18.5000 LDA,LDT1,LDT2
Paving Vendor — 10.2000 HHDT,MHDT
Paving Hauling 0.00000 20.0000 HHDT
Paving Onsite truck — — HHDT
Architectural Coating Worker 20.6751 18.5000 LDA,LDT1,LDT2 Architectural Coating Vendor — 10.2000 HHDT,MHDT
Architectural Coating Hauling 0.00000 20.0000 HHDT
Architectural Coating Onsite truck — — HHDT

5.4. Vehicles

5.4.1. Construction Vehicle Control Strategies
Non-applicable. No control strategies activated by user.

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 240,179 80,059.7 2,346.36 260.707 3,128.48

5.6. Dust Mitigation

5.6.1. Construction Earthmoving Activities
Phase Name Material Imported (Cubic
Y ards)
Material Exported (Cubic
Y ards)
Acres Graded (acres) Material Demolished (Ton of
Debris)
Acres Paved (acres)
Demolition 0.00000 0.00000 0.00000 1,577.00 0.00000
Grading — 500.000 0.00000 0.00000 0.00000
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Paving 0.00000 0.00000 0.00000 0.00000 1.44700

5.6.2. Construction Earthmoving Control Strategies
Control Strategies Applied Frequency (per day) PM10 Reduction PM2.5 Reduction Water Exposed Area 2 61% 61%
Water Demolished Area 2 36% 36%

5.7. Construction Paving
Phase Name Land Use Area Paved (acres) % Asphalt
Paving Apartments Mid Rise 0.25000 0%
Paving Enclosed Parking Structure 1.19700 100%

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
2026 0.00000 1,027.54 0.03300 0.00400
2027 0.00000 1,027.54 0.03300 0.00400
2028 0.00000 1,027.54 0.03300 0.00400

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
485.450 485.450 485.450 177,189 4,056.98 4,056.98 4,056.98 1,480,798 Enclosed Parking
Structure

0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 600 N Rosemead Custom Report, 3/13/2026
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5.10. Operational Area Sources

5.10.1. Hearths
Land Use Hearth Type Unmitigated (number) Mitigated (number) Apartments Mid Rise Wood Fireplaces 0 0
Apartments Mid Rise Gas Fireplaces 0 0
Apartments Mid Rise Propane Fireplaces 0 0
Apartments Mid Rise Electric Fireplaces 0 0
Apartments Mid Rise No Fireplaces 0 0
Apartments Mid Rise Conventional Wood Stoves 0 0
Apartments Mid Rise Catalytic Wood Stoves 0 0
Apartments Mid Rise Non-Catalytic Wood Stoves 0 0
Apartments Mid Rise Pellet Wood Stoves 0 0
Enclosed Parking Structure Wood Fireplaces 0 0
Enclosed Parking Structure Gas Fireplaces 0 0
Enclosed Parking Structure Propane Fireplaces 0 0
Enclosed Parking Structure Electric Fireplaces 0 0
Enclosed Parking Structure No Fireplaces 0 0
Enclosed Parking Structure Conventional Wood Stoves 0 0 Enclosed Parking Structure Catalytic Wood Stoves 0 0
Enclosed Parking Structure Non-Catalytic Wood Stoves 0 0 Enclosed Parking Structure Pellet Wood Stoves 0 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)
240,179 80,059.7 2,346.36 260.707 3,128.48
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5.10.3. Landscape Equipment
Season Unit Value
Snow Days day/yr 0.00000
Summer Days day/yr 250.000

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 487,556 1,027.54 0.0330 0.0040 1,477,210 Enclosed Parking Structure 63,488.0 1,027.54 0.0330 0.0040 0.00000

5.12. Operational Water and Wastewater Consumption

5.12.1. Unmitigated
Land Use Indoor Water (gal/year) Outdoor Water (gal/year) Apartments Mid Rise 4,957,415 257,117
Enclosed Parking Structure 0.00000 0.00000

5.13. Operational Waste Generation

5.13.1. Unmitigated
Land Use Waste (ton/year) Cogeneration (kWh/year)
Apartments Mid Rise 98.4290 0.00000
Enclosed Parking Structure 0.00000 0.00000
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5.14. Operational Refrigeration and Air Conditioning Equipment

5.14.1. Unmitigated
Land Use 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 2,088.00 0.00225 2.50000 2.50000 10.00000
Apartments Mid Rise Household
refrigerators and/or
freezers
R-134a 1,430.00 0.11538 0.60000 0.00000 1.000000

5.15. Operational Off-Road Equipment

5.15.1. Unmitigated

5.16. Stationary Sources

5.16.1. Emergency Generators and Fire Pumps

5.16.2. Process Boilers

5.17. User Defined

5.18. Vegetation

5.18.1. Land Use Change

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

5.18.1. Biomass Cover Type
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5.18.1.1. Unmitigated
Biomass Cover Type Initial Acres Final Acres

5.18.2. Sequestration

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

8. User Changes to Default Data

8.1. Justifications
Screen Justification
Land Use Based on the Project's Site Plan
Construction: Construction Phases Based on applicant construction questionnaire Construction: Off-Road Equipment Based on the Project's construction questionnaire Construction: Trips and VMT Based on construction questionnaire Operations: Vehicle Data Based on the Project's trip generation estimate Operations: Hearths Based on Project Site Plan

8.3. Land Use
Model Parameter Units Default Value New Value
Lot Area acre 3.50000 2.15000
Building Area sq. ft 127,680 118,607
Landscape Area sq. ft — 15,000.0
Building Area sq. ft 53,200.0 18,132.0
Landscape Area sq. ft — 0.00000
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8.4. Construction

8.4.1. Construction Phases
Phase Type Phase Name Model Parameter Default Value New Value Demolition Demolition End Date 7/29/2026 8/31/2026
Demolition Demolition Work Days per Phase 20.0000 44.0000 Grading Grading Start Date 8/7/2026 9/1/2026
Grading Grading End Date 8/18/2026 9/29/2026
Grading Grading Work Days per Phase 8.00000 21.0000
Building Construction Building Construction Start Date 8/19/2026 9/30/2026 Building Construction Building Construction End Date 7/7/2027 9/30/2027 Building Construction Building Construction Work Days per Phase 230.000 262.000 Paving Paving Start Date 7/8/2027 3/31/2028
Paving Paving End Date 8/2/2027 5/3/2028
Paving Paving Work Days per Phase 18.0000 24.0000
Architectural Coating Architectural Coating Start Date 8/3/2027 5/3/2027 Architectural Coating Architectural Coating End Date 8/28/2027 5/3/2028 Architectural Coating Architectural Coating Work Days per Phase 18.0000 263.000

8.4.2. Off-Road Equipment
Phase Name Equipment Type Model Parameter Default Value New Value Demolition Excavators Number per Day 2.00000 1.000000

8.4.6. Trips and VMT
Phase Name Trip Type Model Parameter Default Value New Value Demolition Hauling One-Way Trips per Day 8.97727 6.00000 Demolition Hauling Miles per Trip 20.0000 10.00000
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Grading Hauling One-Way Trips per Day 3.00000 6.00000
Grading Hauling Miles per Trip 20.0000 10.00000

8.5. Operations

8.5.1. Mobile Sources

8.5.1.1. Vehicle Data
Land Use Model Parameter Units Default Value New Value
Apartments Mid Rise Weekday Trip Rate size/day 5.44000 3.65000 Apartments Mid Rise Saturday Trip Rate size/day 4.91000 3.65000 Apartments Mid Rise Sunday Trip Rate size/day 4.09000 3.65000

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TABLE OF CONTENTS

1 Introduction .................................................................................................................................................. 3

1.1 Project Description ............................................................................................................................. 3 2 Existing Transportation Network .................................................................................................................. 5

2.1 Existing Transit Service ....................................................................................................................... 7 3 Transportation Analysis Methodology .......................................................................................................... 9

3.1 Vehicle Miles Traveled per Capita .................................................................................................... 10

3.2 Vehicle Trips per Capita .................................................................................................................... 10

3.3 Proximity and Quality of Bicycle Network ........................................................................................ 10

3.4 Proximity and Quality of Transit Network ........................................................................................ 11

3.5 Pedestrian Accessibility .................................................................................................................... 11 4 Transportation Impact Analysis .................................................................................................................. 12

4.1 VMT and VT Analysis ......................................................................................................................... 12

4.2 Proximity and Quality of Bicycle and Transit Networks .................................................................... 12

4.3 Pedestrian Accessibility .................................................................................................................... 13 5 Conclusions ................................................................................................................................................. 14 Appendix A – TDF Model Outputs ....................................................................................................................... 15

TABLES
Table 1: Existing Transit Service Stop Locations ................................................................................................... 7 Table 2: City of Pasadena CEQA Thresholds of Significance ................................................................................. 9 Table 3: Bicycle Facilities Hierarchy .................................................................................................................... 10 Table 4: Transit Facilities Hierarchy .................................................................................................................... 11 Table 5: VMT and VT Performance Measures Analysis Results .......................................................................... 12 Table 6: Proximity and Quality of Bicycle and Transit Network Performance Measures Analysis Results ......... 12 Table 7: Pedestrian Accessibility Analysis Results............................................................................................... 13

FIGURES
Figure 1 – Project Site Plan ................................................................................................................................... 4 Figure 2 – Roadway Classification ......................................................................................................................... 6

Rosemead Family Apartments
CEQA Evaluation
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1 INTRODUCTION
This report summarizes the results of the California Environmental Quality Act (CEQA) evaluation for the proposed Rosemead Family Apartments project, hereinafter referred to as the “project”, located at 600 North Rosemead Boulevard in the City of Pasadena. This report provides detailed CEQA analysis including the net changes in vehicle miles traveled (VMT) per capita, vehicle trips per capita (VT), the project impact on service population proximity access to transit and bike facilities and walk accessibility score.

1.1 Project Description
The proposed project consists of a two-story and a five-story family housing development with a total of 133 units (131 affordable housing units and 2 manager’s units). The project is planned to provide a total of 55 vehicle parking spaces and 22 bicycle parking spaces with two full-access driveways off of Rosemead Boulevard to the south of the project site. The primary pedestrian access would be through access points fronting Rosemead Boulevard. The project would include amenities such as office, club rooms, laundry room, landscaped patios, open courtyard, playground areas, and other recreational amenities. The existing project site consists of a 56,828 square-foot two-story office building (west building) and a two-story parking garage (east building), for a total area of approximately 93,760 square feet. The construction of this project would require the west building to be repurposed and converted to a residential building and east building to be demolished. Figure 1 presents the project’s site plan.

Figure 1Project Site PlanVehicle AccessMain Pedestrian Access Main Pedestrian AccessCity of PasadenaRosemead Family ApartmentsLocal Mobility Analysis & CEQA

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2 EXISTING TRANSPORTATION NETWORK

This section describes the roadway system within the project vicinity. The existing configurations of the transportation network, within the study area, are described below:

Orange Grove Boulevard, oriented in an east-west direction, is designated as a City Connector. The roadway is undivided, and consists of two lanes in each direction. On-street parking is generally permitted in both directions. The roadway has a posted speed limit of 40 mph.

Rosemead Boulevard, oriented in an east-west direction, is designated as a City Connector. The roadway is divided with a two-way-left-turn lane, and consists of two lanes in each direction in the study area. On-street parking is generally permitted in both directions, but a portion of the west side is unavailable for on-street parking as it is designated as No Stopping at Any Time. The roadway has a posted speed limit of 40 mph.

Rosemead Boulevard is the sole vehicular and pedestrian access point for the project site.

Foothill Boulevard, oriented in an east-west direction, is designated as a City Connector. The roadway is partially divided with raised medians and partially divided with a two-way-left-turn lane, and consists of two lanes in each direction in the study area. On-street parking is generally prohibited in both directions, except a short section east of Halstead Street, where on-street parking is permitted in both directions with a two-hour limit. The roadway has a posted speed limit of 35 mph.

Hastings Ranch Drive, oriented in an east-west direction, is designated as a Neighborhood Connector. The roadway is undivided, and consists of one lane in each direction. On-street parking is generally permitted in both directions. The roadway has a posted speed limit of 35 mph.

Sierra Madre Villa Avenue, oriented in a north-south direction, is designated as a City Connector. The roadway is partially undivided and partially divided with a two-way-left-turn lane, and consists of one lane in each direction south of Hermanos Street and two lanes in each direction north of Hermanos Street. On-street parking is generally permitted in both directions north of Orange Grove Boulevard – Rosemead Boulevard.

South of Orange Grove Boulevard – Rosemead Boulevard, on-street parking is generally permitted in the southbound direction with a two-hour limit. The roadway has a posted speed limit of 30 mph.

Greenhill Road, oriented in a north-south direction, is designated as a Neighborhood Connector. The roadway is undivided, and consists of one lane in each direction. On-street parking is generally prohibited in both directions. The roadway has a posted speed limit of 25 mph.

Halstead Street, oriented in a north-south direction, is designated as a Neighborhood Connector. The roadway is divided with a two-way-left-turn lane, and consists of one lane in each direction. On-street parking is generally prohibited in the northbound direction and is generally permitted in the southbound direction with a two-hour limit. The roadway assumes the prima facie speed of 25 mph.

Figure 2 shows the existing street network and classifications in the study area.

Figure 2Roadway Classifications

NOT TO SCALE
City of PasadenaRosemead Family ApartmentsLocal Mobility Analysis & CEQA

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2.1 Existing Transit Service
LA Metro, Pasadena Transit, and Foothill Transit provide transit services in the study area. The bus stop locations, per line, are summarized in Table 1.

Table 1: Existing Transit Service Stop Locations
Location LA Metro Pasadena Transit Foothill Transit
Sierra Madre Villa Ave / Orange Grove Blvd / Rosemead Blvd:

Northwest corner 268 32 None
Southwest corner None 33
40 None
Southeast corner 268 32 None
Sierra Madre Villa Ave / Alameda St:

Northwest corner None 32 None
Sierra Madre Villa Ave / Foothill Blvd:

Northwest corner 487/489 31
60 None
Northeast corner 268 32 187
Southeast corner
266
268
487/489
31 32
33 40
60 187
Sierra Madre Villa Ave / I-210 Ramps (Sierra Madre Villa Station):

Northeast corner
266
268
487/489
31 32
33 40
60 None
Southeast corner A Line None None
Greenhill Rd / Halstead St / Rosemead Blvd:

Northwest corner None 33
40 None
Halstead St / Foothill Blvd:

Northwest corner None 33 None
Northeast corner None 33 None
Southeast corner 266 40
60 None
Trader Joe’s Driveway / Rosemead Blvd:

Southwest corner None 40 None

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Location LA Metro Pasadena Transit Foothill Transit
Ralph’s Driveway / Foothill Blvd:

Northwest corner None 40
60 None
Hastings Ranch Dr / Rosemead Blvd:

Southwest corner None 40 None
Rosemead Blvd / Foothill Blvd:

Northwest corner 266 40
60 187
Northeast corner None 40
60 None
Southwest corner 266 None 187

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3 TRANSPORTATION ANALYSIS METHODOLOGY

This section discusses the methodologies and thresholds used in the CEQA transportation analysis. There are several performance measures that are analyzed for this study. These performance measures assess the quality of walking, biking, transit, and vehicular activity in the City:

 Vehicle Miles Traveled (VMT) per Capita;
 Vehicle Trips (VT) per Capita;
 Proximity and Quality of the Bicycle Network;
 Proximity and Quality of the Transit Network; and
 Pedestrian Accessibility.

Analyzing these performance measures is critical to being consistent with the sustainability goals of the General Plan and evaluating different travel modes to understand the needs of the community. After the performance measures are calculated, the values are compared to the City of Pasadena CEQA thresholds of significance to determine significant impact. Table 2 details the thresholds of significance used in the study.

Table 2: City of Pasadena CEQA Thresholds of Significance Metric Description Impact Threshold
VMT per Capita Vehicle Miles Traveled (VMT) in the City of Pasadena per service population (population + jobs/employees)
Net change in VMT per capita is 16.8% below
Citywide average baseline
2017 Baseline: 35.6

16.8% Below Baseline Threshold: 29.6
VT per Capita Vehicle Trips (VT) in the City of Pasadena per service population
Net change in VT per service population is

16.8% below Citywide average baseline
2017 Baseline: 4.2

16.8% Below Baseline Threshold: 3.5
Proximity and
Quality of Bicycle
Network
Percent of service population within a ¼ mile of
bicycle facility types.

Any decrease in baseline Citywide service
population within a ¼ mile of Level 1 or 2 bike
facilities.
2017 Baseline: 32.3%
Proximity and
Quality of Transit
Network
Percent of service population located within a ¼ mile
of transit facility
Any decrease in baseline Citywide service
population within a ¼ miles of Level 1 or 2
transit facilities.
2017 Baseline: 66.8%
Pedestrian
Accessibility
The Pedestrian Accessibility Score uses the mix of
destinations and a network-based walkshed to
evaluate walkability
Any decrease in the Citywide Pedestrian
Accessibility Score
2017 Baseline: 3.9

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3.1 Vehicle Miles Traveled per Capita
VMT per capita is calculated by aggregating the miles traveled for trips from the City of Pasadena Travel Demand Model, which is derived from the Southern California Association of Governments (SCAG) regional model. The total VMT consists of 100% of the miles traveled for trips that start and finish within the City and 100% of the miles traveled for trips with one end outside of the City. The total VMT is divided by the City’s total service population (population + jobs/employees) to derive VMT per capita.

VMT tends to increase with the addition of number of people/residents in the population. Therefore, the City can reduce VMT per capita with strategic land use policies that reduce the distance average Pasadena residents travel daily and build more developments in areas with access to diverse modes of transportation, such as transit and bikes.

3.2 Vehicle Trips per Capita
VT per capita is the sum of the origin and destination trips within the City, which is generated by the City of Pasadena Travel Demand Model. Regional VT is calculated by aggregating the VT within the City and 100% of the VT that either start or end in the City with one trip end outside of the City. The final City’s VT is divided by the City’s total service population (population + jobs/employees).

Similar to the VMT, VT tends to increase with the addition of number of people/residents in the population.

Therefore, the City can reduce VT per capita with strategic land use policies that reduce the distance average Pasadena residents travel daily and build more developments in areas with access to diverse modes of transportation, such as transit and bikes.

3.3 Proximity and Quality of Bicycle Network
The proximity and quality of bicycle network is measured by the percentage of the City’s service population, which are residents and number of jobs/employees, located within a quarter mile of bicycle facility types. There are three levels of bicycle facilities based on the City’s Bicycle Transportation Plan, and those three levels are summarized in Table 3.

Table 3: Bicycle Facilities Hierarchy
Level Description Facilities Included
1 Advanced Facilities
Bike Paths
Multipurpose Paths
Cycle Tracks/Protected Bike Lanes
2 Dedicated Facilities
Buffered Bike Lanes
Bike Lanes
Bike Boulevards
3 Basic Facilities
Bike Routes
Enhanced Bike Routes
Emphasized Bikeways

For the analysis, total service population within a quarter-mile buffer of levels 1 and 2 bicycle networks was identified.

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3.4 Proximity and Quality of Transit Network
The proximity and quality of transit network is measured by the percentage of the City’s service population located within a quarter mile of transit facility types. There are three levels of transit facilities as summarized in Table 4.

Table 4: Transit Facilities Hierarchy
Level Facilities Included
1 Includes all A Line (i.e., Gold Line) stops as well as corridors with transit service, whether it be a single route or multiple routes combined, with headways of five minutes or less during peak periods. 2 Includes corridors with transit headways of between six and 15 minutes in peak periods. 3 Includes corridors with transit headways of 16 minutes or more at peak periods.

For the analysis, total service population located within a quarter-mile buffer of levels 1 and 2 transit networks was identified.

3.5 Pedestrian Accessibility
Pedestrian accessibility score is calculated by measuring the average walkability in the project TAZ, based on an accessibility metric. The metric consists of a number of land use types accessible to a resident or an employee in the project TAZ within a 5-minute walk. The land uses used in the metric are:

 Retail
 Personal Services
 Restaurant
 Entertainment
 Office (including private sector and government offices)  Medical (including medical office and hospital uses)
 Culture (including churches, religious, and other cultural uses)  Park and Open Space
 School (including elementary and high schools)
 College

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4 TRANSPORTATION IMPACT ANALYSIS
This section includes the CEQA transportation impact analysis utilizing the methodologies described in Section

3. 4.1 VMT and VT Analysis
VMT per Capita and VT are analyzed using the City’s travel demand model which utilizes TransCAD software to simulate travel volumes and patterns for the City of Pasadena. Multi-family land use was used for the project.

Table 5 summarizes the results of the proposed project’s VMT and VT impacts on the transportation system using the travel demand model and performance measure module. The results are based on the project’s motorized and non-motorized travel patterns, trip lengths, surrounding land uses, and the City’s transportation network. Appendix A includes the model output module used to calculate the performances measures.

Table 5: VMT and VT Performance Measures Analysis Results Transportation Performance Measures 16.8% Baseline Value Project-related Incremental Change Impact?
VMT Per Capita 29.6 VMT per Capita 8.2 VMT per Capita No VT Per Capita 3.5 VT per Capita 3.3 VT per Capita No

As summarized in Table 5, the incremental/net change in VMT per capita and VT per capita are not forecast to exceed the thresholds set forth in the City’s guidelines.

4.2 Proximity and Quality of Bicycle and Transit Networks The proposed affordable housing project would increase the service population on the site as compared to the existing use. As such, citywide population in the existing plus project scenario would be greater than the citywide population in the existing scenario. Table 6 summarizes the existing and existing plus project evaluation of the Proximity and Quality of Bicycle and Transit networks.

Table 6: Proximity and Quality of Bicycle and Transit Network Performance Measures Analysis Results Transportation Performance Measures Existing Value Existing Plus Project Value Impact? Proximity and Quality of Bicycle Network 32.3% of population and jobs ≥ 32.3% of population and jobs No Proximity and Quality of Transit Network 66.8% of population and jobs ≥ 66.8% of population and jobs No

As summarized in Table 6, the project is not forecast to exceed the Proximity and Quality of Bicycle and Transit Network thresholds.

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4.3 Pedestrian Accessibility
Given the average walkability in the zone because of the number of land use types accessible to the service population, the Pedestrian Accessibility score would not be decreased. Therefore, the project is not forecast to exceed the Pedestrian Accessibility threshold. Table 7 summarizes the existing and existing plus project evaluation of the pedestrian accessibility.

Table 7: Pedestrian Accessibility Analysis Results
Transportation Performance Measures Existing Value Existing Plus Project Value Impact? Pedestrian Accessibility C – 3.9 land use types C – 3.9 land use types No

As summarized in Table 7, the project is not forecast to exceed the pedestrian accessibility threshold.

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5 CONCLUSIONS
Iteris prepared a CEQA transportation impact analysis for the proposed affordable housing development located at 600 North Rosemead Boulevard (Rosemead Family Apartments) in the City of Pasadena. The following describes the results of the CEQA analysis:

 The project is not forecast to exceed the VMT per capita threshold.  The project is not forecast to exceed the VT per capita threshold.  The project is not forecast to exceed the proximity and quality of bicycle network thresholds.  The project is not forecast to exceed the proximity and quality of transit network thresholds.  The project is not forecast to exceed the pedestrian accessibility threshold.

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APPENDIX A – TDF MODEL OUTPUTS

Project:

METRIC DESCRIPTION IMPACT THRESHOLD EXISTING VALUE PLUS PROJECT VALUE IMPACT VMT Per Capita
Vehicle Miles Traveled (VMT) in
the City of Pasadena per service
population (population + jobs)
Net change in VMT per service
population is 16.8% below
Citywide average baseline
2017 Baseline: 35.6 29.6 VMT per capita 8.2 VMT per capita No VT Per Capita
Vehicle Trips (VT) in the City of
Pasadena per service population
Net change in VT per service
population is 16.8% below
Citywide average baseline
2017 Baseline: 4.2 3.5 VT per capita 3.3 VT per capita No Proximity and
Quality of Bicycle
Network
Percent of service population
within a ¼ mile of bicycle facility
types
Any decrease in baseline
Citywide service population
within a ¼ mile of Level 1 or 2
bike facilities

32.3% of population
and jobs

32.3% of population
and jobs No
Proximity and
Quality of Transit
Network
Percent of service population
located within a ¼ mile of transit
facility types
Any decrease in baseline
Citywide service population
within a ¼ mile of Level 1 or 2
transit facilities

66.8% of population
and jobs

66.8% of population
and jobs No
Pedestrian
Accessibility
The Pedestrian Accessibility Score
uses the mix of destinations and a
network-based walk shed to
evaluate walkability
Any decrease in the Citywide
Pedestrian Accessibility Score C – 3.9 land use types C – 3.9 land use types No Pasadena Project Level Performance Criteria
Rosemead Family Apartments
3/16/2026
Daily Trips Internal External Pop 137,182
Internal 381,849 335,668 Emp 113,025
External 335,668 534,549 Ext. Factor 100%
EMFAC
Speed Internal External Regional Total INPUT
5 178 0 5,268 5,446 0%
10 1,337 653 28,816 30,805 0%
15 10,306 3,119 89,008 102,434 1%
20 18,689 11,177 184,432 214,298 2%
25 107,895 24,255 344,000 476,151 5%
30 512,796 115,649 676,288 1,304,733 15%
35 856,781 261,727 760,115 1,878,624 21%
40 154,529 89,753 477,223 721,505 8%
45 102,781 41,565 366,070 510,417 6%
50 79,374 14,051 440,952 534,377 6%
55 70,055 169,321 460,361 699,736 8%
60 97,011 37,190 424,975 559,176 6%
65 505,883 90,508 319,425 915,816 10%
70 1,880 412 801,557 803,849 11%
75 0 0 137,625 137,625
80 0 0 0 0
85 0 0 0 0
SUM 2,519,495 859,380 5,516,116 8,894,991 100%
Metric Internal External Regional Total Capita
VMT 2,519,495 859,380 5,516,116 8,894,991 35.6
VT 381,849 671,336 - 1,053,185 4.2
Length 6.6 1.3 - 8.4 -
Metric Internal External Regional Total Capita
VMT 2,519,495 859,380 5,516,116 8,894,991 35.6
VT 381,849 671,336 - 1,053,185 4.2
Length 6.6 1.3 - 8.4 -
Pop Emp VMT VT VMT/Cap VT/Cap
137,182 113,025 8,894,991 1,053,185 35.6 4.2
Pop Emp VMT VT VMT/Cap VT/Cap
136,911 113,160 8,893,871 1,052,731 35.6 4.2
Pop Emp VMT VT VMT/Cap VT/Cap
271 -135 1,119 455 8.2 3.3

PASS PASS

FINAL DAILY SCENARIO SUMMARY
2017 EXISTING SUMMARY

INCREMENTAL SCENARIO RESULTS

REDUCED DAILY SUMMARY

TOTAL RAW DAILY SUMMARY

FINAL REDUCED DAILY VMT BY SPEED BIN

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