Crossings Campus Project ESA / D202100410.00
Noise Analysis Report for Off-Hours Construction i August 2023
TABLE OF CONTENTS
Executive Summary ........................................................................................................... ES-1 Section 1: Introduction ............................................................................................................ 1
1.1 Purpose ............................................................................................................................ 1
1.2 Project Location ................................................................................................................ 1
1.3 Surrounding Land Uses ................................................................................................... 2 Section 2: Project Description ............................................................................................... 5
2.1 Project Understanding ...................................................................................................... 5
2.2 Description of Off-Hours Construction ............................................................................. 5 Section 3: Environmental and Regulatory Setting ............................................................... 7
3.1 Noise Characteristics and Descriptors ............................................................................. 7
3.1.1 Noise Exposure and Community Noise .................................................................. 7
3.1.2 Noise Effects on People .......................................................................................... 8
3.1.3 Noise Attenuation .................................................................................................... 9
3.2 Existing Conditions ......................................................................................................... 10
3.2.1 Noise Sensitive Receptors .................................................................................... 10
3.2.2 Existing Ambient Noise Levels ............................................................................. 11
3.3 Regulatory Setting .......................................................................................................... 13
3.3.1 Culver City General Plan Noise Element .............................................................. 13
3.3.2 Culver City Municipal Code................................................................................... 13 Section 4: Impacts and Mitigation Measures...................................................................... 14
4.1 Methodology ................................................................................................................... 14
4.2 Impact Thresholds .......................................................................................................... 14
4.3 Project Impact Analysis .................................................................................................. 15
4.3.1 Noise 15
4.3.2 Air Quality .............................................................................................................. 22
4.3.3 Lighting .................................................................................................................. 28 Section 5: References ........................................................................................................... 30
Appendices
A Off-hours Scope of Work
B Ambient Noise Measurement at Nearest Noise Sensitive Receptor C Off-Hours Construction Noise Calculations
D Air Quality Modeling and Calculations
E Night Construction Lighting Calculations
Figures
Figure 1 Regional and Project Vicinity Locations ..................................................................... 3 Figure 2 Aerial Photograph with Surrounding Land Uses ........................................................ 4 Figure 3 Noise Measurement Locations ................................................................................ 12
Noise Analysis & Updated Environmental Review
The Culver Studios CPA 7 TUP ESA / 190574
Noise & Lighting Technical Report ii June 2019
Tables
Table ES-1 Off-Hours Construction Noise Levels at Offsite Noise-Sensitive Receptors .............................................................................................................. 2 Table ES-2 Existing and Existing plus Project Construction Vehicular Traffic Noise Levels .................................................................................................................... 3 Table 1 Summary of Ambient Noise Measurements ....................................................... 11 Table 2 Culver City Noise Standards ............................................................................... 13 Table 3 Off-hours Construction Equipment Reference Noise Levels .............................. 17 Table 4 Off-Hours Construction Noise Levels at Offsite Noise-Sensitive Receptors ............................................................................................................ 18 Table 5 Existing and Existing plus Project Construction Vehicular Traffic Noise Levels .................................................................................................................. 20 Table 6 Off-Hours Construction Noise Levels at Offsite Noise-Sensitive Receptors – SEL Analysis ................................................................................... 21 Table 7 SCAQMD Regional Emissions Thresholds ......................................................... 25 Table 8 Estimated Maximum Mitigated Regional Construction Emissions ...................... 26 Table 9 Estimated Maximum Unmitigated Localized Construction Emissions ................ 27
Crossings Campus Project ESA / D202100410.00
Noise Analysis Report for Off-Hours Construction ES-1 August 2023
EXECUTIVE SUMMARY
The City of Culver City evaluated environmental impacts for the Crossing Campus Project (the Project) in the Crossings Campus Environmental Impact Report (EIR) (State Clearinghouse No. 2021110079), which was prepared in accordance with the California Environmental Quality Act (CEQA). A Notice of Determination was filed on December 13, 2022.
Chapter 9.07 of the City of Culver City Municipal Code (CCMC) provides specific noise restrictions and exemptions for noise sources within the City. CCMC noise regulations state that construction activity shall be prohibited, except between the hours of 8:00 a.m. and 8:00 p.m.
Mondays through Fridays; 9:00 a.m. and 7:00 p.m. Saturdays; 10:00 a.m. and 7:00 p.m. Sundays.
The EIR included an evaluation of extended construction hours, with construction beginning at 7:00 a.m. and lasting through 10:00 p.m.
Culver Crossings Properties LLC (Applicant) proposes off-hours construction activities for the Project located at 8825 National Boulevard in Culver City, CA. For the purposes of this report, the Project refers to the off-hours construction activities. The Applicant is submitting an application to Culver City (City) to obtain a temporary use permit (TUP) to allow for off-hours concrete pours at the Project site beginning at 2:00 a.m. and grading/excavation and soils export beginning at 5:00 a.m., instead of 7:00 a.m. No change to the construction end time of 10:00 p.m., as was analyzed in the EIR, is being requested. The Applicant is proposing an off-hours construction work plan to the City to obtain a TUP to the City’s noise ordinance to conduct project construction activities outside of the allowable construction hours specified the City’s noise ordinance.
The Applicant is requesting permission for the off-hours construction activities to ensure the highest quality of the concrete structure and to reduce the overall impact to the surrounding communities through a shortened construction duration and peak activities. The off-hours work would result in limiting the number of mat foundation pours to yield maximum strength of the material and prevent cracking, and reduce the potential for concrete spoiling in concrete truck during delivery. Most importantly, extended hours will reduce the number of days required for mat foundation activities.
The off-hours construction activities would also include soil excavation and haul truck export of the excavated material. The off-hours work would result in reducing the number of days required to excavate the site and export the soil. The extended hours will reduce the number of days and duration for excavation and export activities.
This report has been prepared to support the City’s environmental review process regarding potential noise and other environmental impacts associated with the proposed off-hours Project’s construction. This analysis is required as part of the Project’s proposed off-hours construction Section 1. Introduction
Crossings Campus Project ESA / D202100410.00
Noise Analysis Report for Off-Hours Construction ES-2 August 2023 work plan to be submitted to the City to obtain a TUP allowing an exception to the City’ noise ordinance to work outside of the City’s allowable construction hours. The noise analysis will estimate the noise levels generated by the proposed off-hours activities including the noise attenuation provided by the distance between noise sources and receptors and whether the noise levels would exceed applicable City noise standards or substantially increase existing ambient noise levels at the adjacent noise sensitive receptors (i.e., residential uses in the surrounding area).
This report summarizes the Project off-hours construction noise levels generated on-site and attenuated by distance and the existing sound wall to the nearest noise sensitive receptors off-site, and the potential for the Project to conflict with the applicable Culver City noise regulations, standards, and thresholds. The Project would incorporate and implement all applicable project design features (PDFs) and mitigation measures that were included in the Crossings Campus EIR to reduce noise impacts. The results of the analysis for on-site construction noise sources are summarized in Table ES-1. As shown therein, accounting for exterior-to-interior noise attenuation1 and with implementation of applicable PDFs and mitigation measures, construction noise impacts from on-site sources associated with the off-hours construction activities would not exceed Culver City noise regulations, standards, and thresholds for any sensitive receptors.
TABLE ES-1
OFF-HOURS CONSTRUCTION NOISE LEVELS AT OFFSITE NOISE-SENSITIVE RECEPTORS Construction Phases
Sensitive Receptors
Estimated Unmitigated
Average Construction
Noise Levels (dBA Leq)
a
Estimated Mitigated
Average Construction
Noise Levels (dBA Leq)
Noise Threshold
(Ambient + 5
dBA) a b
Exceeds
Threshold?
Grading/Excavation
R1 – Ground Floors
R1 – Upper Floors
R2 – Ground Floors
R2 – Upper Floors
R3 – Ground Floors
R3 – Upper Floors
R4
53.4 53.4
61.1 61.1
53.9 53.9
49.3 35.4
45.4 43.1
53.1 35.9
45.9 31.3
60.7 60.7
68.7 68.7
64.4 64.4
64.4 No
No
No
No
No
No
No
Foundations/Concrete Pour
R1 – Ground Floors
R1 – Upper Floors
R2 – Ground Floors
R2 – Upper Floors
R3 – Ground Floors
R3 – Upper Floors
R4
51.8 51.8
59.2 59.2
52.5 52.5
48.1 33.8
43.8 41.2
51.2 34.5
44.5 30.1
54.6 54.6
58.7 58.7
57.5 57.5
57.5 No
No
No
No
No
No
No
1 Per the LAX South Airfield Improvement Project EIR (SCH 2004081039), buildings with windows open would provide approximately 13 dBA exterior/interior noise reduction.
Section 1. Introduction
Crossings Campus Project ESA / D202100410.00
Noise Analysis Report for Off-Hours Construction ES-3 August 2023 Construction Phases
Sensitive Receptors
Estimated Unmitigated
Average Construction
Noise Levels (dBA Leq)
a
Estimated Mitigated
Average Construction
Noise Levels (dBA Leq)
Noise Threshold
(Ambient + 5
dBA) a b
Exceeds
Threshold?
Tower Crane Erection/
Disassembly
R1 – Ground Floors
R1 – Upper Floors
R2 – Ground Floors
R2 – Upper Floors
R3 – Ground Floors
R3 – Upper Floors
R4
46.5 46.5
54.1 54.1
47.0 47.0
42.4 28.5
38.5 36.1
46.1 29.0
39.0 24.4
54.6 54.6
58.7 58.7
57.5 57.5
57.5 No
No
No
No
No
No
No
a Per the LAX South Airfield Improvement Project EIR (SCH 2004081039), buildings with windows open would provide approximately 13 dBA exterior/interior noise reduction.
b Existing measured ambient levels at the project and receptor site boundary, as shown in Table 1, already exceed these standards; therefore, the existing ambient levels (plus 5 dBA) are assumed to be the standards not to exceed (e.g., 62 dBA Leq measured on a weekday from 7:00 a.m. to 8:00 a.m. is greater than the City’s daytime standard of 50 dBA Leq, therefore, the adjusted day standard for this weekday off-hour would be 67 dBA Leq).
c R4 is assumed to have a similar ambient noise environment as R3 and uses the same noise threshold.
SOURCE: ESA, 2023, Culver City 2015.
The results of the analysis for off-site construction noise sources are summarized in Table ES-2.
As shown therein, with implementation of applicable PDFs and mitigation measures, off-site construction noise impacts associated with the off-hours construction activities would not exceed Culver City noise regulations, standards, and thresholds (same finding as the Crossings Campus EIR).
TABLE ES-2
EXISTING AND EXISTING PLUS PROJECT CONSTRUCTION VEHICULAR TRAFFIC NOISE LEVELS Roadway Segment Adjacent Land Use
Leq (dBA) a, b
Existingc
Existing +
Constructiond
Increase over
Existing
Venice Boulevard
Between Cattaraugus Ave and La Cienega Blvd Commercial / Residential 49.6 53.6 4.0 Between Helms Ave and Cattaraugus Ave Commercial / Residential 49.6 53.6 4.0 Between La Cienega Blvd and I-10 Westbound
Off-Ramp/Cadillac Ave
Commercial / Residential 49.6 53.6 4.0
Between National Blvd and Helms Ave Commercial / Residential 49.6 53.6 4.0 East of I-10 Westbound Off-Ramp/Cadillac Ave Commercial / Residential 49.6 53.6 4.0 a Calculated based on existing traffic volumes provided by Fehr & Peers, July 2022. Values are rounded to the nearest tenth decimal place. The distance from roadside receiver traffic noise level to roadway centerline was estimated using Web -based satellite imaging for each roadway segment analyzed.
b Residential roadway segments where haul trucks would not travel were removed. c The existing traffic noise level is represented by the lowest hourly average noise level at receptor R1, which is the closest receptor to the haul route.
d The traffic noise levels from off hours construction include a 13 dBA reduction from exterior -to-interior noise attenuation for buildings with windows open.
SOURCE: ESA, 2023.
Section 1. Introduction
Crossings Campus Project ESA / D202100410.00
Noise Analysis Report for Off-Hours Construction ES-4 August 2023 As demonstrated above, the TUP to allow extended nighttime construction hours would not result in adverse noise impacts to ground floor sensitive receptors or to upper floor receptors during construction activities.
The off-hours construction would extend the construction day and result in a relatively small increase in daily air pollutant emissions. An air quality analysis was conducted to determine the maximum daily emissions from the off-hours construction combined with the maximum daily construction emissions identified in the Crossing Campus EIR. With implementation of mitigation measures identified in the Crossing Campus EIR, the off-hours construction would not result in an exceedance of the South Coast Air Quality Management District significance thresholds for daily regional emission or localized emissions for all applicable criteria pollutants and ozone precursors. Therefore, impacts would continue to be less than significant with mitigation, as was determined in the Crossing Campus EIR. Therefore, the TUP to allow extended nighttime construction hours would not result in adverse air quality impacts.
The Project would involve lighting to support nighttime construction. However, the lighting analysis provided herein has demonstrated that no significant lighting impacts would occur at the nearby residential locations. Therefore, the TUP to allow extended nighttime construction hours would not result in adverse lighting impacts.
Crossings Campus Project ESA / D202100410.00
Noise Analysis Report for Off-Hours Construction 1 August 2023 SECTION 1
Introduction
1.1 Purpose
The City of Culver City evaluated environmental impacts in the Crossings Campus Environmental Impact Report (EIR) (State Clearinghouse No. 2021110079), which was prepared in accordance with the California Environmental Quality Act (CEQA). A Notice of Determination was filed on December 13, 2022.
Chapter 9.07 of the City of Culver City Municipal Code (CCMC) provides specific noise restrictions and exemptions for noise sources within the City. CCMC noise regulations state that construction activity shall be prohibited, except between the hours of 8:00 a.m. and 8:00 p.m.
Mondays through Fridays; 9:00 a.m. and 7:00 p.m. Saturdays; 10:00 a.m. and 7:00 p.m. Sundays.
The EIR included an evaluation of extended construction hours, with construction beginning at 7:00 a.m. and lasting through 10:00 p.m.
Culver Crossings Properties LLC (Applicant) proposes off-hours construction activities for the proposed Crossings Campus development located at 8825 National Boulevard in Culver City, CA (Project). This report considers the potential noise, lighting, and air quality impacts from the extended construction hours. This report has been prepared to support the City’s environmental review process regarding potential noise and other environmental impacts associated with the proposed off-hours construction. This analysis is required as part of the Crossings Campus Project’s proposed off-hours construction work plan to be submitted to the City to obtain a Temporary Use Permit (TUP) allowing an exception to allow work outside of the City’s allowable construction hours specified in the City’s noise ordinance.
This report identifies applicable City noise regulations and evaluates potential noise, lighting, and air quality impacts associated with the proposed off-hours construction of the Project.
Information used to prepare this analysis includes the environmental analyses in the Crossings Campus Environmental Impact Report (EIR), the City’s General Plan Noise Element and Municipal Code noise ordinance, off-hours construction data provided by the Applicant, and other sources identified herein.
1.2 Project Location
The Culver City Parcel is located to the east of the Downtown District of Culver City and in the Washington National Transit Oriented Development District. The Los Angeles Parcel is located in the West Adams–Baldwin Hills–Leimert Community Plan area of Los Angeles. Primary regional access is provided by two freeways; the Santa Monica Freeway (I-10) located approximately 630 Section 1. Introduction
Crossings Campus Project ESA / D202100410.00
Noise Analysis Report for Off-Hours Construction 2 August 2023 feet north of the Project Site and the San Diego Freeway (1-405), located approximately 2.09 miles west of the Project Site. See Figure 1, Regional and Project Vicinity Locations, for the location of the Project Site. The Project Site is also served by the Los Angeles County Metropolitan Transportation Authority (Metro) “E” Line and multiple Metro and local bus lines that provide service along Venice, National, and Washington Boulevards.
1.3 Surrounding Land Uses
The area surrounding the Project Site is developed primarily with a mix of commercial and residential uses. Land uses located adjacent to the Project Site include: a two-story office building to the north (across Venice Boulevard), the Helms Bakery Complex single-story warehouse and retail building to the east, the 8777 Washington four-story office building and the Access Culver City five-story mixed use residential building to the south (across Washington Boulevard), and the six to seven-story Ivy Station mixed-use project consisting of office, residential, hotel, and retail uses to the west across National Boulevard. Existing buildings on the Project are set back approximately 24 feet from the Helms Bakery Building and are only approximately 2 feet off the property line at Venice Boulevard. See Figure 2, Project Location – Aerial Photograph, for an aerial image of the Project Site and surrounding development.
The parcels surrounding the Project Site in Culver City have a General Plan land use designation of General Corridor. The parcels surrounding the Project Site in the City of Los Angeles are designated by the West Adams–Baldwin Hills–Leimert Community Plan for Hybrid Industrial, Neighborhood Commercial, Limited Industrial, and Open Space land uses (i.e., Venice Boulevard landscaped median), and are within the CM-2D-CPIO (Commercial Manufacturing), C2-2D- CPIO (Commercial), and (Q)M1-2D and M1-1 (Limited Industrial) and OS-1XL (Open Space) zones.
PROJECT
SITE
Venice Boulevard
Path: \\azr-file01\GIS_SHARE\GIS\GIS\Projects\2021xxx\D202100410_Culver_Crossings\03_MXDs_Projects\DEIR\Fig2-1_Reg Proj Vicinity Loc.mxd, dkaneshiro 5/2/2022 SOURCE: Open Street Map, 2021
N
0 300
Feet
Project Boundary
Crossings Campus
Figure 1
Regional and Project Vicinity Locations
PROJECT
SITE
Washington Boulevard
National Boulevard
Venice Boulevard
Wesley Street
Ivy Street
Curts Avenue