11 & 12 - Attachment A - Exhibit C-J - Housing Element Update (2008-2014) - Addendums 1-8 — Newport Beach City Council, April 9, 2024 (part 32 of 33)

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Preliminary Water Quality Management Plan (PWQMP)
1401 Quail Street
Section II Project Description
II.1 Project Description
Development Category
(Verbatim from WQMP):

Project Area (W): 74,212
Narrative Project
Description:

Project Area
Pre -Project Conditions
Post -Project Conditions
Drainage
Patterns/ Connections
Description of Proposed Project
All significant redevelopment projects, where significant redevelopment is defined as the addition or replacement of 5,000 or more square feet of impervious surface on an already developed site.
........................................................................r............................

Number of Dwelling Units: 78 SIC Code: 6513
......................................................................... ............................

This project is a residential redevelopment.

The project site consists of the demolition of one existing commercial building, paved parking lot, and certain utilities. The proposed includes the construction of a multi -story building above an underground parking garage. Proposed BMPs, locations as shown on WQMP plan in c Attachment C, will treat runoff for the entire site. A private round -a- bout alley will be constructed for ingress/egress along Spruce Avenue. .............................................................r.............................................................

Pervious Impervious
................................ r............................. _................................. r.............................

Area Area
Percentage Percentage
(acres or sq ft) (acres or sq ft)
:................................:............................:.................................:............................. 10,060 sq ft E 13.6% : 64,152 sq ft E 86.4%
10,332sq ft : 13.9% 63,880sq ft E 86.1%
E The existing site drainage pattern is generally flowing from the south corner of the site to the north corner of the site with surface slopes of around 0.3% to 4.0%. The majority of the site is graded to flow to an E existing concrete swale which discharges at the north corner of the site E to Quail Street. The runoff will then flow southeasterly alongside the curb and gutter where it will eventually drain into an existing catch basin located at the northwest corner of the intersection of Quail Street and Spruce Avenue.

The east side of the building's runoff flows perpendicularly away from the building, towards the City right-of-way. The runoff will also eventually drain into the existing catch basin as described above.

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E The catch basin discharges through a public 18" RCP storm drain that connects to a public 42" RCP storm drain. The storm drain eventually discharges to San Diego Creek which leads to Upper Newport Bay.

II.2 Potential Stormwater Pollutants
Pollutants of Concern
Circle One:

E=Expected to
Pollutant
be of concern
Additional Information and Comments
N=Not Expected
to be of concern
Suspended -Solid/ Sediment
E ® N ❑
Landscaping will exist.
......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

Nutrients
E ® N ElLandscaping
will exist.
.......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

Heavy Metals
E ® N ElParking
and an entrance/ exit street will exist.
......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

Pathogens (Bacteria/ Virus)
E El N ®
Land use does not involve food or animal waste
products.
......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

Pesticides
E ® N ❑
Landscaping will exist.

Oil and Grease
E ® N ❑
Vehicle traffic expected.
.......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

Toxic Organic Compounds
E ® N ❑
Landcape maintenance and waste handling
areas will exist.

Trash and Debris
E ® N ❑
Trash and debris expected.

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II.3 Hydrologic Conditions of Concern
❑ No - Show map - OCFD Drainage Map is included in Attachment C. ® Yes - Describe applicable hydrologic conditions of concern below. Refer to Section 2.2.3 in the TGD.

The project site is located in area that is potentially susceptible to hydromodification impacts. The site discharge also does not remain in an engineered or stabilized channel in its entire path to a receiving water body.

In order to address the hydrologic conditions of concern. The 2 year, 24-hr post -development runoff volume does not exceed the pre -development runoff volume by more than 5 percent. The totals for the runoff volume can be seen below.

Pre -Development: 6,316 cubic feet
Post -Development: 6,011 cubic feet
Post -Development: 4.8% Decrease
Hydrology calculations and map can be found in Attachment D of this report for reference.

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IIA Post Development Drainage Characteristics
The proposed drainage is to have two different DMA's, DMA -A and DMA-B. DMA -A will include the entirety of the building along with the adjacent areas between the building and the right-of- way/property line on the north, west, and east side of the building. DMA-B will be the area south of the building, which includes the entire round -a -bout access street and the area leading to the main entry of the building.

DMA -A will utilize Biotreatment BMPs in the form of Bioretention Planters with Permavoid Boxes in lieu of gravel and underdrain to treat/retain its required DCV of 2,644 W. The reason Permavoid Boxes will be used instead of gravel is because Permavoid Boxes have a 95% porosity rate compared to the 40% porosity of gravel. This allows a much greater volume of retainment with a smaller footprint. Another reason is Permavoid Boxes allows for runoff to be used as a means of irrigation for the planter box. Permavoid Boxes will infiltrate runoff upwards via capillary rise through the engineered soil media and then be used to irrigate the landscaped area of the planter box.

In regards to drainage, the majority of the DMA's runoff will be collected through roof drains.

Runoff will be discharged directly on top of the Planter Boxes via roof downspout drains. Runoff will be bio-treated as it infiltrates through the engineered soil media of the planter boxes and then the runoff will be retained within the Permavoid structures/soil media/ponding. As the planter boxes are filled and the required DCV is treated/retained, runoff will be captured by an overflow inlet located at the top of ponding of the planter boxes. Runoff will then be ultimately discharged to Quail Street and Spruce Avenue via parkway culverts.

DMA-B will utilize a Harvest and Use BMP by using Permavoid Boxes for its required DCV of 1,066 W. Unlike DMA -A, runoff will discharge directly underground to the Permavoid Boxes. This means runoff will not be bio-treated by an engineered soil media before being retained. The retained runoff will be used for irrigation purposes however.

The runoff of DMA-B will sheet flow to catch basins located on the south side of the proposed round -a -bout access street. The catch basins will have Flogard Filter Inserts installed to pre -treat the runoff before entering the storm drain system. The storm drain system will then direct the runoff to the bottom of a Permavoid Boxes located at the south side of the building. The entirety of the DCV will be captured and retained within the Permavoid Boxes. Runoff will infiltrate upwards via capillary rise through the engineered soil media and then be used to irrigate the landscaped area above the Permavoid Boxes. During large storm events where the Permavoid Boxes are fully saturated and the required DCV is retained, runoff will be discharged to a parkway culvert that discharges to Spruce Avenue. The landscaped areas above the Permavoid boxes will also have supplemental irrigation provided for both cases of DMA -A and DMA-B.

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II S Property Ownership/Management
The project site is owned by Intracorp SW, LLC. The project site is to be developed into a Podium structure with retail units and condominium units. A blanket easement will be recorded over the site for access and maintenance. A property management company will be formed and will be responsible for the maintenance of all proposed infrastructure and BMP's.

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Section III Site Description
III.1 Physical Setting
Planning Area/ N/A
Community Name
Location/Address
West corner of Quail Street and Spruce Avenue
1401 Quail Street Newport Beach, CA 92660
Land Use Proposed Condominium Complex
Zoning Planned Community - PC11 Newport Place
Acreage 1.71 acres
Predominant Soil Type Soil Type D
Ill, 2 Site Characteristics
Precipitation Zone 0.75-inch Design Capture Storm Depth (per TGD Figure XVI-1) The existing site is generally flat. The surrounding areas of the Topography
project site are a commercial building and parking lot to the northwest, a commercial building and parking lot to the southwest, Spruce Avenue to the southeast, and Quail Street to the northeast.

The pattern drainage is generally from north to south. In the site's Drainage
existing condition, there are no on -site drainage systems and the Patterns/Connections runoff would eventually flow off -site to a catch basin located at the northwest corner of the intersection of Quail Street and Spruce Avenue.

The upper 20 feet of the site is predominantly clay with low permeability which may not be suitable for infiltration. Although the Soil Type, Geology, and soil after 20 feet is sand and has good infiltration rates, groundwater Infiltration Properties was encountered at -25 feet, therefor infiltration is not recommended.

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The maps in the TGD indicate that the site has soil Type D. Based on this, infiltration is not feasible for the project as well.

Site Characteristics (continued)
..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

Hydrogeologic Groundwater was encountered at approximately 25 feet below site (Groundwater) Conditions grade.

The site is not in favor of infiltration. This is due to the site having soil type D and having mostly clay with low permeability within the Geotechnical Conditions upper 20 feet of the ground. Although infiltration tested well after 20 (relevant to infiltration) feet, groundwater is located shortly after at approximately 25 feet below grade. Due to this, the site is not suitable for an infiltration bmp.

Off -Site Drainage There are no concerns of off -site run on to the project.

In the site's existing condition, there are no on -site drainage systems.

Utility and Infrastructure The runoff would eventually flow off -site to a catch basin located at Information the northwest corner of the intersection of Quail Street and Spruce Avenue.

III.3 Watershed Description
San Diego Creek Reach 1
Receiving Waters Newport Bay, Upper (Ecological Reserve) Newport Bay, Lower
...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

San Diego Creek (Reach 1): Benthic Community Effects, DDT, Indicator Bacteria, Malathion, Nutrients, Sedimentation/Siltation, Selenium, Toxaphene, Toxicity
303(d) Listed Impairments
Newport Bay, Upper (Ecological Reserve): Chlordane, Copper, DDT, Indicator Bacteria, Malathion, Nutrients, PCBs
(Polychlorinated biphenyls), Sedimentation/Siltation, and Toxicity.

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....................................................................................................................................................................................................................................................................................................................................................................................................................................................................

Lower Newport Bay: Chlordane, Copper, DDT, Indicator Bacteria, Nutrients, PCBs, Toxicity.
.................................................................................................................................................,..................................................................................

San Diego Creek (Reach 1): Nutrients, Pesticides and
Turbidity/Siltation.

Applicable TMDLs Upper Newport Bay (Ecological Reserve): Bacteria Indicators/Pathogens, Metals, Nutrients, Pesticides, and Turbidity/ Siltation.

Lower Newport Bay: Nutrients, Pesticides
.................................................................................................................................................:................................

Pollutants of concern: Suspended Solid/Sediments, Nutrients, Pollutants of Concern for Pathogens, Pesticides, Oil & Grease, Trash & Debris. the Project Primary Pollutants of Concern: Suspended Solid/Sediments, Nutrients, Pathogens and Pesticides.

Environmentally Sensitive
and Special Biological There is no ESA within 200 feet of the project site.

Significant Areas
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Section IV Best Management Practices (BMPs)
IV. 1 Project Performance Criteria
(NOC Permit Area only) Is there an approved WIHMP or equivalent for the project area that includes more stringent LID feasibility YES ❑ NO criteria or if there are opportunities identified for implementing LID on regional or sub -regional basis?
If yes, describe WIHMP
feasibility criteria or N/A
regional/sub-regional LID
opportunities.

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Project Performance Criteria (continued)
If HCOC exists,
list applicable
hydromodification
control HCOC is not applicable for this project. See section II.3 of the report for performance more information.
criteria (Section

7.II-2.4.2.2 in
MWQMP)
Priority Projects must infiltrate, harvest and re -use, evapotranspire, or bio treat/bio filter, the 85th percentile, 24- hour storm event (Design Capture List applicable LID ;Volume).
performance A properly designed Bio treatment system may only be considered if criteria (Section infiltration harvest re -use and evapotranspiration (ET) cannot be feasibly

7.II-2.4.3 from implemented for the full design capture volume. In this case, infiltration, MWQMP)
List applicable
treatment control
BMP performance
criteria (Section

7.II-3.2.2 from
MWQMP)
Calculate LID
design storm
capture volume
for Project.
harvest re -use, and ET practices must be implemented to the greatest extent feasible and bio treatment may be provided for the remaining design capture volume.

Satisfaction of LID performance criteria also fully satisfies treatment control performance criteria. If it is not feasible to meet LID performance criteria through retention and/ or bio treatment provided on site or at a sub - regional scale, then treatment control of treatment control BMP's shall be provided on site or offsite prior to discharge to waters of the US DCV = design storm capture volume, cu-ft
C = runoff coefficient = (0.75 x imp + 0.15)
Imp = impervious fraction of drainage area (ranges from 0 to 1) d = storm depth (inches)
A = tributary area (acres)
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IV.2. SITE DESIGN AND DRAINAGE PLAN
The following section describes the site design BMPs used in this project and the methods used to incorporate them. Careful consideration of site design is a critical first step in storm water pollution prevention from new developments and redevelopments.

Site Design BMPs
Minimize Impervious Area
• Impervious surfaces have been minimized by incorporating landscaped areas throughout the site surrounding the proposed building. Landscaping will be provided throughout the site within the common areas as well as around the perimeter of the building.

Preserve Existing Drainage Patterns and Time of Concentration Runoff from the site will continue to flow similar to existing conditions. Low -flows and first - flush runoff will drain to a Permavoid Planter Boxes. The Permavoid Planter Boxes are sized to be able to treat the required DCV of their respective DMA's.

Disconnect Impervious Areas
• Landscaping will be provided adjacent to sidewalks and along the perimeter of the building.

Low -flows will drain to the proposed Permavoid Planter Box BMP's.

Protect Existing Vegetation and Sensitive Areas, and Revegetate Disturbed Areas There are no existing vegetated or sensitive areas to preserve on the project site. All disturbed areas will either be paved or landscaped.

Drainage Management Areas:

In accordance with the MS4 permit and the 2013 OC TGD, the project site has been divided into Drainage Management Areas (DMAs) to be utilized for defining drainage areas and sizing LID and other treatment control BMPs. DMAs have been delineated based on the proposed site grading patterns, drainage patterns, storm drain and catch basin locations.

The Drainage Management Areas (DMA) locations, design capture volumes (DCV) and treatment flow rates (QDesign) for each DMA are illustrated and calculated in Attachment A-BMP Site Plan and Attachment B-BMP Calculations. These have been derived utilizing the "Simple Method" in accordance with the TGD Section I1I.1.2.

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IV.3 LID BMP SELECTION AND PROJECT CONFORMANCE ANALYSIS IV.3.1 Hydrologic Source Controls
HSC's are not utilized for this project. Runoff will be treated by Harvest and Use BMPs and Bio- treatment BMPs.

Name
Included?
Localized on -lot infiltration
❑
Impervious area dispersion (e.g. roof top
disconnection)
❑
Street trees (canopy interception)
❑
Residential rain barrels (not actively managed)
❑
Green roofs/Brown roofs
❑
Blue roofs
❑
Impervious area reduction (e.g. permeable
pavers, site design)
❑
Other:
❑
Other:
❑
Other:
❑
Other:
❑
Other:
❑
Other:
❑
Other:
❑
Other:
❑
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IV.3.2 Infiltration BMPs
Name
Included?
Bioretention without underdrains
❑
Rain gardens
❑
Porous landscaping
❑
Infiltration planters
❑
Retention swales
❑
Infiltration trenches
❑
Infiltration basins
❑
Drywells
❑
Subsurface infiltration galleries
❑
French drains
❑
Permeable asphalt
❑
Permeable concrete
❑
Permeable concrete pavers
❑
Other:
❑
Other:
❑
Per the soils report, infiltration is not feasible due to high groundwater and poor infiltration rates. Also, the TGD Map in Attachment C indicates presence of Type D soils which are not suitable for infiltration.

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IV.3.3 Evapotranspiration, Rainwater Harvesting BMPs
Name
Included?
All HSCs; See Section IV.3.1
❑
Surface -based infiltration BMPs
❑
Biotreatment BMPs
❑
Above -ground cisterns and basins
❑
Underground detention
❑
Other: Permavoid Boxes
Other:
❑
Other:
❑
Per the soils report, infiltration is not feasible due to high groundwater and poor infiltration rates. Also, the TGD Map in Attachment C indicates presence of Type D soils which are not suitable for infiltration.

DMA-B will utilize Permavoid Boxes as a Rainwater Harvest and Use BMP. Runoff of DMA-B will be collected via catch basins that have Flogard Filters installed as a pre-treatment method.

Runoff will then flow through the storm drain system directly to the underground Permavoid Boxes. The entirety of DMA-B's DCV will be retained within the Permavoid Boxes which have a porosity of 95%. Once the required DCV is retained, the runoff will infiltrate upwards through via capillary rise and then be used to irrigate the plants/landscaping area above the Permavoid Boxes.

During large storm events where the Permavoid Boxes are fully saturated and the required DCV is retained, runoff will be discharged to a parkway culvert that discharges to Spruce Avenue.

This discharge method will be designed to handle a 100-year storm event.

See attachment B for BMP Calculations and fact sheets.

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IV.3.4 Biotreatment BMPs
Name
Included?
Bioretention with underdrains
❑
Stormwater planter boxes with underdrains
❑
Rain gardens with underdrains
❑
Constructed wetlands
❑
Vegetated swales
❑
Vegetated filter strips
❑
Proprietary vegetated biotreatment systems
❑
Wet extended detention basin
❑
Dry extended detention basins
❑
Other: Bioretention Planters with Permavoid
Boxes
ED
Other:
❑
Per the soils report, infiltration is not feasible due to high groundwater and poor infiltration rates. Also, the TGD Map in Attachment C indicates presence of Type D soils which are not suitable for infiltration.

DMA -A will utilize Biotreatment BMPs in the form of Bioretention Planters with Permavoid Boxes in lieu of gravel and underdrain. The reason DMA-A's BMP is considered biotreatment is because runoff will discharge directly on top of the planter boxes, where it will then be bio- treated by the engineered soil media.

A Permavoid Planter Box effectively operates the same as a bioretention planter with underdrain without the need for gravel and an underdrain pipe. Runoff will discharge directly on top of the planter box via roof drain downspouts. Runoff will then infiltrate downwards and be treated by the engineered soil media. Below the engineered soil media will be the Permavoid Boxes, which retain the treated runoff as if it were the gravel of a bioretention basin.

Once the Planter Box is at capacity, meaning the ponding, soil media, and Permavoid Boxes are fully saturated with stormwater, runoff will be collected by an overflow inlet at the top of Intracorp SW, LLC
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ponding. The overflow inlet will discharge the runoff through an outlet pipe and then to a parkway culvert where runoff ultimately ends in either Spruce Avenue or Quail Street.

See attachment B for BMP Calculations and fact sheets.

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IV.3.8 Non-structural Source Control BMPs
Non -Structural Source Control BMPs
Check One
If not applicable, state brief
Included
Not
Identifier
Name
reason
Applicable
N1
Education for Property Owners,
®
❑
Tenants and Occupants
..........................ctivi
N2
t.....y ...R...estrc... ic.ti`..ons......................................

A
® ..................
❑.......................................................... ..................................................................................................................................................................

N3
Common Area Landscape
®
❑
Management
..................................................................................................................................................................

N4
BMP Maintenance
®
❑
..................................................................................................................................................................

N5
Title 22 CCR Compliance (How
❑
®
Not required onsite
development will comply)
..................................................................................................................................................................

N6
Local Industrial Permit Compliance
❑
®
Does not pertain to site
..................................................................................................................................................................

N7
Spill Contingency Plan
El®
No spill concern onsite
.....................

N8
...........................................................................................................................................

Underground Storage Tank
❑
®
Not present onsite
Compliance
......................

N9
.......................................................................

Hazardous Materials Disclosure
❑
................................................................... ®
Not present onsite
Compliance
N10
I
.Uniform.Fire Code Implementation ...
......® ....
....... ❑.......
...........................................
. ...
..................

IN11
...................................................... ...

Common Area Litter Control
.... ....
....... ...
®
...... .....
....... ...
❑
............................................ .
.....................

N12
...........................................................................................................................................

Employee Training
®
❑
..................................................................................................................................................................

N13
Housekeeping of Loading Docks
®
❑
..................................................................................................................................................................

N14
I
Common Area Catch Basin Inspection
®
❑
..................................................................................................................................................................

N15
Street Sweeping Private Streets and
®
❑
Parking Lots
..............................................................................................

N16
i Retail Gasoline Outlets
❑
................................................................... ®
Not present onsite
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IV.3.9 Structural Source Control BMPs
Structural Source Control BMPs
Check One
Identifier
Name
If not applicable, state brief
Included
Not
reason
Applicable
S1
Provide storm drain system stenciling
®
❑
and signage
Design and construct outdoor material
S2
storage areas to reduce pollution
❑
®
Outdoor storage is not anticipated
introduction
Design and construct trash and waste
S3
storage areas to reduce pollution
®
❑
introduction
Use efficient irrigation systems &
S4
landscape design, water conservation,
®
❑
smart controllers, and source control
S5
Protect slopes and channels and
El®
No slopes anticipated onsite
provide energy dissipation
Incorporate requirements applicable to
individual priority project categories
❑
®
Project not located in SDRWQCB
(from SDRWQCB NPDES Permit)
S6
Dock areas
❑
®
Not present onsite
S7
Maintenance bays
❑
®
Not present onsite
S8
Vehicle wash areas
❑
®
Not present onsite
S9
Outdoor processing areas
❑
®
Not present onsite
S10
Equipment wash areas
❑
®
Not present onsite
S11
Fueling areas
❑
®
Not present onsite
S12
Hillside landscaping
❑
®
Not present onsite
S13
Wash water control for food
❑
®
Not present onsite
preparation areas
S14
Community car wash racks
❑
®
Not present onsite
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IV.4 ALTERNATIVE COMPLIANCE PLAN (IF APPLICABLE)
IV.4.1 Water Quality Credits
I Description of Proposed Project 11
Project Types that Qualify for Water Quality Credits (Select all that apply):
projects that reduce the
overall impervious
footprint of the project
site.
❑Brownfield redevelopment, meaning
redevelopment, expansion, or reuse of real
property which may be complicated by the
presence or potential presence of hazardous
substances, pollutants or contaminants, and
which have the potential to contribute to
adverse ground or surface WQ if not
redeveloped.
❑ Mixed use development, such as a
combination of residential, commercial,
industrial, office, institutional, or other land
uses which incorporate design principles
that can demonstrate environmental benefits
that would not be realized through single
use projects (e.g. reduced vehicle trip traffic
with the potential to reduce sources of water
or air pollution).
❑ Higher density development projects which
include two distinct categories (credits can only
be taken for one category): those with more than
seven units per acre of development (lower credit
allowance); vertical density developments, for
example, those with a Floor to Area Ratio (FAR)
of 2 or those having more than 18 units per acre
(greater credit allowance).
❑ Transit -oriented developments, such as a mixed
use residential or commercial area designed to
maximize access to public transportation; similar to
above criterion, but where the development center is
within one half mile of a mass transit center (e.g. bus, rail, light rail or commuter train station). Such
projects would not be able to take credit for both
categories, but may have greater credit assigned
❑ Redevelopment
projects in an established
historic district, historic
preservation area, or
similar significant city
area including core City
Center areas (to be
defined through
mapping).
❑
❑ Live -work developments, a
❑In -fill projects, the
❑Developments with
ElDevelopments
variety of developments designed
conversion of empty lots
dedication of undeveloped
i Developments in historic
to support residential and
and other underused
portions to parks,
;districts ori
in a city center 1
vocational needs together - i
spaces into more
preservation areas and
;historic
similar to criteria to mixed use 1
beneficially used spaces,
other pervious uses.
area.
i preservation
development; would not be able
such as residential or
areas.
to take credit for both categories.
commercial areas.

Calculation of
Water Quality
Credits N/A
(if applicable)
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IV.4.2 Alternative Compliance Plan Information
Not Applicable
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Section V Inspection/Maintenance
Responsibility for BMPs
BMP Inspection/Maintenance
Inspection/
Minimum
Responsible
BMP
Maintenance
Frequency of
Party(s)
Activities Required
Activities
Permavoid Planter
-Inspect semiannually for
Areas
Owner
beginning (October) and end of
Ongoing
the wet season (April)
Educational materials will be
provided to tenants
Education for
annually. Materials to be
Property Owners,
distributed are found in
Tenants and
Owner
Attachment F. Tenants will be
Annually
Occupants
provided these materials
by the Owner prior to
occupancy and periodically
thereafter
The Owner will prescribe
activity restrictions to protect
surface water quality, through
lease terms or other
Activity Restrictions
Owner
equally effective measure, for
Ongoing
the property.

Restrictions include, but are
not limited to, prohibiting
vehicle maintenance or
vehicle washing.

Maintenance shall be
Common Area
consistent with City
Landscape
Owner
requirements. Fertilizer
Monthly
Management
and/or pesticide usage shall
be consistent with County
Management Guidelines
Intracorp SW, LLC
F-26
Section V

Page 25 ends

Preliminary Water Quality Management Plan (PWQMP)
1401 Quail Street
for Use of Fertilizers (OC
DAMP Section 5.5) as well
as local requirements.

Maintenance includes
mowing, weeding, and debris
removal on a weekly
basis. Trimming, replanting,
and replacement of
mulch shall be performed on
an as -needed basis to
prevent exposure of erodible
surfaces. Trimmings,
clippings, and other landscape
wastes shall be
properly disposed of in
accordance with local
regulations. Materials
temporarily stockpiled during
maintenance activities shall
be placed away from
water courses and storm
drain inlets.

Litter patrol and
other litter control activities
Common Area Litter
Owner
shall be performed on a
Weekly
Control
weekly basis and in
conjunction with routine
maintenance activities.

Educate all new employees/
managers on storm
water pollution prevention,
particularly good
Employee Training
Owner
housekeeping practices, prior
Annually
to the start of the rainy
season (October 1). Refresher
courses shall be
conducted on an as needed
basis.

Drive aisles & parking areas
Street Sweeping
must be swept at least
Private Streets and
Owner
quarterly (every 3 months),
Quarterly
Parking Lots
including prior to the start
of the rainy season (October
1).

Intracorp SW, LLC
F-27
Section V

Page 26 ends

Preliminary Water Quality Management Plan (PWQMP)
1401 Quail Street
Common Area Catch
Basin Inspection
Owner
Catch basin inlets and other
drainage facilities shall
be inspected after each storm
event and once per
year. Inlets and other
facilities shall be cleaned prior
to the rainy season, by
October 1 each year.

Annually
Storm drain stencils shall be
inspected for legibility, at
Storm Drain
minimum, once prior to the
Stencilling and
Owner
storm season, no later
Annually
Signage
than October 1 each year.

Those determined to be
illegible will be re -stencilled
as soon as possible.

In conjunction with routine
maintenance activities,
verify that landscape design
continues to function
properly by adjusting
properly to eliminate
overspray to hardscape areas,
Use efficient
and to verify that irrigation
irrigation systems &
timing and cycle lengths are
landscape design,
adjusted in accordance
water conservation,
Owner
with water demands, given
Twice per year
smart controllers,
time of year, weather, and
and source control
day or night time
temperatures. System testing
shall occur twice per year.

Water from testing/flushing
shall be collected and
properly disposed to the
sewer system and shall not
discharge to the storm drain
system.

Intracorp SW, LLC
F-28
Section V

Page 27 ends

Preliminary Water Quality Management Plan (PWQMP)
1401 Quail Street
Section VI Site Plan and Drainage Plan

VIA SITE PLAN AND DRAINAGE PLAN
• Refer to Attachment A
Intracorp SW, LLC
F-29
Section VII

Page 28 ends

ATTACHMENT A

BMP SITE PLAN
F-30

LEGEND

BMP CATCHMENT AREA
-SD PROPOSED SD

DIRECTION OF FLOW

RD ROOF DRAIN

CATCH BASIN WITH STENCILING

AND PRE-TREATMENT FILTER INSERT

COMMON AREA EFFICIENT IRRIGATION
& RUN-OFF MINIMIZING LANDSCAPE

IMPERVIOUS AREA

PERMAVOID PLANTER BOX

PROPOSED BUILDING

CATCH BASIN

DRAINAGE AREA

DMA-X AREA (ACRE)
X.XX

ROOF DRAIN

PER PLAN

EROSION PREVENTIC
ENGIN
60-
15-259
10-20% CLEAP
8-12% ORGANI
I

NON-WOVENFILT
-MI
PERMAVi
95%
#5 ® 16" .C. E.W.

M GRATE
FLOW
PIPE
i" FREE BOARD

PONDING DEPTH

ION-WOVENFILTER FABRIC
-MIRAFI 140N

VC OUTLET PIPE

RAPPED IN

ON-WOVENFILTER
\BRIC -MIRAFI 140N

WATER PROOFING

MIRAFI IMPERMEABLE
LINER

BIORETENTION PLANTERS WITH PERMAVOID FOR DMA -A

NOT TO SCALE
ENGINEERED f
60-70% S)
15-25% COMPI
10-20% CLEAN TOP S
8-12% ORGANIC CONTI
pH 5.5-

PERMAVOID BOX
95% POROSI

PVC INLET PIPE

PER PLAN

DVENFILTER FABRIC
140N

PVC OUTLET PIPE

WRAPPED IN

NON-WOVENFILTER
FABRIC -MIRAFI 140N

ER PROOFING

MIRAFI IMPERMEABLE
LINER

HARVEST AND USE PERMAVOID PLANTER FOR DMA-B

NOT TO SCALE

DRAINAGE AREAS

DRAINAGE
AREA

AREA (ACRE)

PERVIOUS

AREA (ACRE)

IMPERVIOUS

AREA (ACRE)
% PERVIOUS
% IMPERVIOUS

DCV (CF)
DMA -A

1.19 0.13

1.06 10.9

89.1 2644
DMA-13

0.52 0.10

0.42 19.0

81.0 1066
TOTAL

1.71 0.23

1.48 13.9

86.1 -
I I\VI . I I\VI .

DISCHARGE DISCHARGE
II

SPRUCE AVENUE
W
III
20' 0' 10' 20' 40'
SCALE: 1 " = 20'
F-31

ATTACHMENT B

BMP CALCULATIONS
F-32

TECHNICAL GUIDANCE DOCUMENT APPENDICES
Worksheet B: Simple Design Capture Volume Sizing Method Step 1: Determine the design capture storm depth used for calculating volume 1 Enter design capture storm depth from Figure III.1, d (inches) d=
inches
Enter the effect of provided HSCs, dHsc (inches)
2 (Worksheet A)
dHsc=
inches
Calculate the remainder of the design capture storm
3 depth, d,emainde, (inches) (Line 1 - Line 2)
dremainder—_
inches
Step 2: Calculate the DCV
1 Enter Project area tributary to BMP (s), A (acres)
A=
acres
2 Enter Project Imperviousness, im (unitless)
imp=
3 Calculate runoff coefficient, C= (0.75 x imp) + 0.15
C=
Calculate runoff volume, Vdesign— (C x dremainder x A x 43560 x Vdesign-_
Cu-ft
4 (1112))
Step 3: Design BMPs to ensure full retention of the DCV Step 3a: Determine design infiltration rate
Enter measured infiltration rate, Kobservea (in/hr)
Kobseroed=
In/hr
1 (Appendix VII)
Enter combined safety factor from Worksheet H, Stotal
Stotai_
2 unitless
3 Calculate design infiltration rate, Kdesi n = KobservedlStotal Kdeslgn=
In/hr
Step 3b: Determine minimum BMP footprint
4 Enter drawdown time, T (max 48 hours)
T=
Hours
Calculate max retention depth that can be drawn down within �max=
feet
5 the drawdown time (feet), D = K x Tx (1112)
max desin
Calculate minimum area required for BMP (sq-ft), Amin = Amin=
sq-ft
6 Vdesi n/ dmax
'Kobseved is the vertical infiltration measured in the field, before applying a factor of safety. If field testing measures a rate that is different than the vertical infiltration rate (for example, three-dimensional borehole percolation rate), then this rate must be adjusted by an acceptable method (for example, Porchet method) to yield the field estimate of vertical infiltration rate, Kobseved• See Appendix VII.

III-16
F-33
December 20, 2013

III-16
F-34
December 20, 2013

ABTINC.
3 WWW.ABTDRAINS.COM
PH: (BOO) 438 - 5057
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Los Angeles Low Impact Development
BMP Design & Material Summary -_
Project Number: PV323388 Date: 4/24/2023
Street Address: Quail St. Project, Newport CA ECD: 0 0
85th Rainfall Depth: 0.75 inches
Design Summary
Material Summary
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At
Ai
Acat
Vcap
Ap
Vcu
Vbf
PF
Dsoil
Dpond
Dip
4A
System
36/60+
23/160T
g5s
85HD
PV150
36/90
W
ID - #
(ft2)
(%)
(ft2)
(ft3)
(ft2)
(ft3)
(ft3)
---
(in.)
(in.)
(in.)
Type
24/30
Pairs
CUB-1
51,836

89.1%
42,132
2633
1,989
1,860
1,160

0.44 18.0

2.0 35.0
150x2
1,468
1,468
332
7,340
245
121.6
CU-2
22,651

81.0%
16,943
1,059
1,133
1,059
0 0.44

18.0 N/A

30.0 150x2
836
836
190
41180
140

69.2 Total
74,487
---
59,075
3,692
3,122
2,919
1,160
---
---
---
---
---
0 0
2,304
0 0
2,304
522
11,520
385
190.8
Permavoid Los Angeles LID Table 1.1
Permavoid Planter Soil Requirements (non -traffic loading):
75% (+/- 5%) by weight shall consist of sand meeting the following:
- For soil depths of 6 to 12 inches, average particle size shall be 500/tm (0.020 in.) - For soil depths of 12 to 24 inches, average particle size shall be 300µm (0.012 in.) • Soils shall have a uniformity coefficient of 4.0 or less.

Soils shall have less than 10% fines (passing 200 sieve) by weight.

Soils used for biofiltration shall meet "Attachment H. Biofiltration/Biofiltration Design Criteria " as provided by the California Regional Water Quality Control Board.

REF:OOPV323388c4846G
F-35

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WWW.ABTDRAINS.COM Los Angeles Low Impact Development _
PH: (BOD) 436 - 6057 Capture & Use / Biofiltration Planter Design Calculations Project Name: Quail St. Project, Newport CA Date: 4/24/2023 Project Number: PV323388
Planter ID Number:

CUB
1 Catchment Area:

Acat
42,132
85th Percentile Storm Depth:

D85

0.0625
Soil Depth:

Dsoil

18.0 Soil Available Water:

Wa
0%
Ponding Depth:

Dpond

2.0 Soil Saturated Infiltration Rate:

Ksat

5.0 Safety Factor:

2.0 Time To Fill:

2.0 Permavoid System Depth:
150x2

11.8 Permavoid Voids:

Vpv
95 7-Month Reference Evapotranspiration:

ETo7

21.7 Permavoid Irrigation Efficiency:

0.85 Calculate the Design Capture Volume (Vcap):

Vcap = D85 • Acat
Vcap = 0.0625ft • 42132.3ft2
Vcap = 2633.3 ft3
Calculate the Permavoid Capture & Use Depth (Dcu):

Dcu = (150x2 Vpv) + (Dsoil • Wa)
Dcu = (11.8in. 95%) + (18in. • 0%)
Dcu = 11.22 in. = 0.935 ft
Calculate the Planter Area (Ap):

Ap = 1989.1 ft2
Calculate the Capture & Use Volume (Vcu):

Vcu = Ap • Dcu
Vcu = 1989.1 ft2 • 0.935ft
Vcu = 1859.7 ft3
Calculate the Biofiltration Volume (Vbf):

Vbf = 1.5 (Vcap - Vcu)
Vbf = 1.5 (2633.3 ft3 - 1859.7 ft3)
Vbf = 1160.3 ft3
Calculate the Minimum Area Required (Amin):

Amin = Vbf / [Tf • (Ksat/SF) + Dpond]
Amin = 1160.3 ft3 / ([2hrs • (S.Oin/hr / 2) + 2in.] / 12ipf) Amin = 1989.1 ft2
ft2
ft
in.
in.
in/hr
hrs
in.
in.

Check the Planter Area (Ap) vs. the Minimum Area Required (Amin):

Ap vs. Amin
1989.1 ft2 vs. 1989.1 ft2
1989.1 ft2 = 1989.1 ft2
Ap = Amin ✓ - CHECKED
Calculate the Minimum Required Plant Factor (PF):

PF = (Vcu • IE) / (ETo7 • Ap)
PF = (1859.7 ft3 • 0.85) / [(21.7in. / 12ipf) • 1989.1 ft2] PF = 0.44
Calculate the 7-Month Estimated Total Water Use (ETWU-7):

ETWU-7 = (ETo7 • PF • Ap) / IE
ETWU-7 = [(21.7in. / 12ipf) • 0.44 • 1989.1 ft2] / 0.85 ETWU-7 = 1859.7 ft3
Design Summary
Planter Area:

Ap
1989.1 ft2
Capture & Use Volume:

Vcu
1859.7 ft3
Biofiltration Volume:

Vbf
1160.3 ft3
Plant Factor (min.):

0.44 Internal Planter Depth:

Dip
35 in.

Material Requirements
Permavoid Units:

PV-150
1468 Units
Capillary Cones:
23/160 T
1468 Pairs
Wicking Geotextile Length:

Cap. Tex.
232 - 332 ft
Planting Media:

By Others
121.6 CY
*NOTES: Quantities are for estimation only. Fluctuations in material quatities will occur based on the precise configuration. Contact ABT-Permavoid for planting media recommendations based on soil depth.

Check the Capture & Use Volume (Vcu) vs. the 7-Month Estimated Total Water Usage (ETWU-7):

Vcu vs. ETWU-7
1859.7 ft3 vs. 1859.7 ft3
1859.7 ft3 = 1859.7 ft3
Vcu = ETWU-7 ✓ -CHECKED
F-36
Aid OrMNILIVIr

STRUCTURAL SUBBASE

PERMEABLE SUBBASE
s

TREE SOLUTIONS

GREEN STREETS

BLUE J GREEN ROOFS

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aIa/► Via► pod
WWW.AE3TDRAINS.00M Los Angeles Low Impact Development _ PH: (800) 436 - 6057 Capture & Use / Biofiltration Planter Design Calculations Project Name: Quail St. Project, Newport CA Date: 4/24/2023 Project Number: PV323388
Planter ID Number:

CU
2 Catchment Area:

Acat
16,943
85th Percentile Storm Depth:

D85

0.0625
Soil Depth:

Dsoil

18.0 Soil Available Water:

Wa
0%
Ponding Depth:

Dpond

0.0 Soil Saturated Infiltration Rate:

Ksat
N/A
Safety Factor:

2.0 Time To Fill:

2.0 Permavoid System Depth:
150x2

11.8 Permavoid Voids:

Vpv
95 7-Month Reference Evapotranspiration:

ETo7

21.7 Permavoid Irrigation Efficiency:

0.85 Calculate the Design Capture Volume (Vcap):

Vcap = D85 • Acat
Vcap = 0.0625ft • 16942.9ft2
Vcap = 1058.9 ft3
Calculate the Permavoid Capture & Use Depth (Dcu):

Dcu = (150x2 Vpv) + (Dsoil • Wa)
Dcu = (11.8in. 95%) + (18in. • 0%)
Dcu = 11.22 in. = 0.935 ft
Calculate the Planter Area (Ap):

Ap = 1132.6 ft2
Calculate the Capture & Use Volume (Vcu):

Vcu = Ap • Dcu
Vcu = 1132.6 ft2 • 0.935ft
Vcu = 1058.9 ft3
Calculate the Minimum Required Plant Factor (PF):

PF = (Vcu • IE) / (ETo7 • Ap)
PF = (1058.9 ft3 • 0.85) / [(21.7in. / 12ipf) • 1132.6 ft2] PF = 0.44
Calculate the 7-Month Estimated Total Water Use (ETWU-7):

ETWU-7 = (ETo7 • PF • Ap) / IE
ETWU-7 = [(21.7in. / 12ipf) • 0.44 • 1132.6 ft2] / 0.85 ETWU-7 = 1058.9 ft3
ft2
ft
in.

Allowed
in.
rol
Design Summary
Planter Area:

Ap
1132.6 ft2
Capture & Use Volume:

Vcu
1058.9 ft3
Biofiltration Volume:

Vbf
N/A
Plant Factor (min.):

0.44 Internal Planter Depth:

Dip
30 in.

Material Requirements
Permavoid Units:

PV-150
836 Units
Capillary Cones:
23/160 T
836 Pairs
Wicking Geotextile Length:

Cap. Tex.
134 - 189 ft
Planting Media:

By Others

69.2 CY
*NOTES: Quantities are for estimation only. Fluctuations in material quatities will occur based on the precise configuration. Contact ABT-Permavoid for planting media recommendations based on soil depth.

Check the Capture & Use Volume (Vcu) vs. the 7-Month Estimated Total Water Usage (ETWU-7):

Vcu vs. ETWU-7
1058.9 ft3 vs. 1058.9 ft3
1058.9 ft3 = 1058.9 ft3
Vcu = ETWU-7 ✓ -CHECKED
F-37
Aid OrMNILIVIr

STRUCTURAL SUBBASE

PERMEABLE SUBBASE
s

TREE SOLUTIONS

GREEN STREETS

BLUE J GREEN ROOFS

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WATER IS OUR MOST PRECIOUS RESOURCE:

ABT Permavoid is a multi -functional stormwater management & water conservation system that mimics the natural water cycle and can save up to 30% on overall site drainage costs.

RETENTION / Modular units with 95% void ratio interlock with patented lateral connectors to create a monolithic DETENTION stormwater management system eliminating the need for end of line ponds and tanks.

PERMEABLE The ultra -shallow profile promotes stormwater infiltration over the largest area possible, including INFILTRATION under traditional pavements like asphalt and concrete removing the added costs of permeable paving.

STRUCTURAL The ultra -high strength (104 psi yield) safely and reliably transfers traffic loads to subgrade soils SUBBASE replacing large volumes of hauled subbase stone.

WATE R Stormwater is efficiently transported to discharge locations or landscaped areas for natural reuse CONVEYANCE eliminating drainage and irrigation pipes.

CAPILLARY Patented wicking cones employ capillary action to bring stormwater directly to the root zone of IRRIGATION landscaped areas while keeping it away from evaporative heat and sunlight for up to 60% savings vs traditional sprinkler irrigation.

Since its introduction ABT Permavoid has revolutionized the way about which stormwater is thought. Its unique capabilities allow even the most challenging developed sites to behave like their natural pre -development counterparts. Whether returned to the community water cycle through infiltration or utilized locally through capillary irrigation, ABT Permavoid promotes the most natural, environmentally friendly methods of managing water. It is the clear choice on sites both large and small when designing sustainable, resilient landscapes that enhance neighborhood aesthetics, mitigate flood risks and during periods of drought, conserve our most precious resource.

F-38 1218

ABT 'INC.

WWW.ABTORAINS.COM
PH: (800) 438 - 6057
PERMAVOID INLET DETAIL - PVIOC-109
...................... .....
.............. ....

THE FOUNDATION FOR OUR FUTURE
Freeboard
Dpond
Scour Prevention Stones / Mat Per Plans
Planter Housing Per Plans
Membrane Liner 30 mil HDPE or LLDPE or Approved)
Permavoid Irrieation - (See Permavoid Planter Details) ° V0
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F-39
0719

ABT 'INC.

WWW.ABTORAINS.COM
PH: (800) 438 - 6057
PERMAVOID INLET DETAIL - PVIOC-101
Permavoid
Outlet Pipe Size & Slope Per Plans
TF Catch Basin Invert & Top Of Grate Per Plans
ABT TrenchFormer Catch Basin or Approved Equal
w/ ABT FirstFlush Pre -Treatment or Approved Equal
In - (See Permavoid Planter Details)
mil HDPE or LLDPE or Approved)
Watertiaht Pine Inlet Connection
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THE FOUNDATION FOR OUR FUTURE
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NOTES:

1. All direct pipe connections to Permavoid systems shall have pre-treatment measures to prevent sedimentation such as ABT FirstFlush or approved alternates.

2. Water fed through direct pipe connections to Permavoid is not eligible for biofiltration.

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F-40

ATTACHMENT C

ORANGE COUNTY RAINFALL ZONES MAP
F-41

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' 3 : I I, dra 151ad I
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u :E Fulferton
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* - F; 4th St 13 11
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Barb* San fidrff a8Y{ya� , M_
oce a C
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L�1r�I E�aeh lder�or � a
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h Ave
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ar
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z
0 W o
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ta IRA�L oQ L
- o
r
0 2.5 5 10
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Miles
0 1.8 3.6 7.2
San pgdro
clralnrlrl
0 LC`II IIS fi'2C � -
Orange
.Santa �j
An
a
E i5farner Ave .Y
r.

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0 r pIT, F:1ti.,-
9J
Citrus St P, _71 A 'a
G
m
r6de LEGEND
*Qinnal
Park AM
-
\hino HMua 9taf9 Park I `
City Boundaries
Hydrologic Soil Groups
�,."'✓� A Soils
I ,,.,''� B Soils
eo r-Qna C Soils
L.

D Soils
71 Source:

Soils: Natural Resources Conservation Service (NRCS)
='r Soil Survey - soil_ca678, Orange County & Western Riverside �aor Date of publication: 2006-02-08
r http://websoiIsurvey.nres.usda.gov/app/HomePage.htm
Q �
1 jk
Ep
= Springs
.tea \ti^ �� $e��fv■
`� ✓�� Lake Il+l.�thwsr
f y�
q A -i
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R
}
- r
r.
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11 ale
11 f +�*
i v
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�I
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k
cv fir
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Ocean ►
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fan Daorgo counTY
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0 off`
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camp
PenR11 lbrl r 40rie
0 0
�J U
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w
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0 O
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FIGURE
XVI-2a
F-43

x
L6
O
O
CV
31 N
O
D
0 0
C_
Q
nI
N
X
N
IL
I
LJ_I
cv
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rn
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0 N
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V
C_
/
0 Q
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L
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LU
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CT
SerFsRO#
4lrporl
4 Ft � } LEGEND
'` c• HillsGwupbCa�l7I 'c
P1.3dU
!I Depth To First Groundwater Contours
l
�( � v 'L.II' •'r:hl�tl�F � ''="' -O �}•anJ�+M1
2■ 4. ,�`r fi.115;i s 1 II/ t Whi.1her &IvA
F a ; . City Boundaries
¢ IIL�LL E JI}'lll:�:: y
� } LJ f.:' YJ r P_ j,r � n � • E F•■Ilcly fv■ {a
T ti n ` b G
_La Warn ti �t,r.,:.l�r �_■_■_� OCWD Groundwater Basin Protection Boundary Hills
ep
1a2-
�: •{ , 4 -• `- I !III - 4�, w rlk+ >:,� k �� L; __ �•� {' -- ■, r.n R I, ',✓ ^ - Note: Data are not available for South Orange County at this time.

Mirada '.�� iI•.1+.' 111 RaYI�
�r Source:

LL
R ■r�-■-■.♦ Sp rotte Fuller and Greenwood 1980.
z
+ ; La hrlrrada ko4iw,;,Y T �/ +'
x ° _ I California Division of Mines and Geology;
-jb California Geological Survey
9 ti z CVI Irf/1 - I• 11 Y' I '{rr.Frn ; W� b Linda U ✓ � ~ � a` cll r #■ � 3 Lam• `♦ .. 4' �_ -µ '
a ° I Cal dasauf4k'
pla cen tia �. 4
r
4 A I —A 61VC L 1 - .. �__ - --- _ ti h a -T :4 r.1�' Norfe q ' r#gslo X r .
x x Corona
� '+ram'' \
_
! %■ r 'ai' •1 �lY .k�.,'.,. I �„nr.r.q,,,. r.�rr
OLI �I� S
a = i ■ ■ n
m}
r, ff U. o N■r W k a ■ ry 4 '
U ,S € a rlrtrnlr + +o
LakeWoo
' '}CI r11-II> I,I•rl: _� a iIna k ♦ , _ � � {' r � -
4 Li 4T '� : '� h- - •�' y a rPark
r
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a •410
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. 1 r I I ■�
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upro�■ c \ •b'pp•A'r5 QfaFIge
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UNWf�rK Lcr'7 r cYi ril;hr �L• Jdhr. '� rr bllperld A-
Cleve.y
�' 318A a111 rlu. ♦ `/
Gae.n `•' 0 t I = Nanapl ♦ L �.�
s
K I E Sur _. : {■�♦ l 5 rl� ■
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Miles
0 1.25 2.5 5
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r
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w
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=
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N
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,W
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Q
FIGURE
F-44

SUSCEPTIBILITY MAP UPDATE (DEC 2012)

ATTACHMENT C

ORANGE COUNTY RAINFALL ZONES MAP
F-46

T
a_
u
r 7
LJ
i�� ELEV. 45.2 FL
"'" IQ2=1.73 CFS
o II u o II JA = 1. 2 1 AC
1�
L--425'
k#
■
IN
n
ELEV. 48.5 FL 10.0
-- — — — — — — —�H GH PT. — — — — — — —
N40'38'15"E 631.61'
Now—
- —
� l� - - - - - - - - - - - - - - - - - - - -
ELEV. 43.6 FL
ZQ2=2.45 CFS
YA=1.71 AC
120.01
EXISTING CONDITION 2—YEAR STORM

TOTAL AREA

PEAK FLOW

TC (MINUTES)

VOLUME (CUBIC FT)
(AC)
(CFS)

1.71 2.45

9.04 6,316
AREA CALCULATIONS:

TOTAL IMPERVIOUS AREA = 64,152 SF = 1.47 AC
TOTAL PERVIOUS AREA = 10,060 SF = 0.24 AC
TOTAL AREA = 74,212 SF = 1.71 AC
PERCENT IMPERVIOUS: 86.4%
PERCENT PERVIOUS: 13.6%
LEGEND

AREA BOUNDARY
■■■■■■■■■■■■■■■■E SUB -AREA BOUNDARY
---- (--- ( --- ( - FLOWLINE

EXISTING UTILITIES

EXISTING STORM DRAIN

FLOW ARROW
ELEV. XXX.XX XXX SURFACE FLOW NODE
TC= XX.XX MIN PIPE FLOW NODE
Q25 =XX.XX CFS

SUB -AREA DESIGNATION
Al

AREA NODE
Ac

SUB -AREA (ACRES)
20' 15' 10' 5' 0' 20' 40'
GRAPHIC SCALE. 1 "=20'
F-47

DEVELOPED CONDITION 2—YEAR STORM

TOTAL AREA

PEAK FLOW

TC (MINUTES)

VOLUME (CUBIC FT)
(AC)
(CFS)

1.71 2.95

6.3 6,011
AREA CALCULATIONS:

TOTAL IMPERVIOUS AREA = 62,043 SF = 1.42 AC
TOTAL PERVIOUS AREA = 12,169 SF = 0.29 AC
TOTAL AREA = 74,212 SF = 1.71 AC
PERCENT IMPERVIOUS: 83.6%
PERCENT PERVIOUS: 16.4%
LEGEND

AREA BOUNDARY
■■■■■■■■■■■■■■■■M SUB -AREA BOUNDARY
---- (--- ( --- ( - FLOWLINE

EXISTING UTILITIES

EXISTING STORM DRAIN

FLOW ARROW
ELEV. XXX.XX XXX SURFACE FLOW NODE
TC= XX.XX MIN PIPE FLOW NODE
Q25 =XX.XX CFS

SUB -AREA DESIGNATION
Al

AREA NODE
Ac

SUB -AREA (ACRES)
20' 15' 10' 5' 0' 20' 40'
GRAPHIC SCALE. 1 "=20'
F-48

****************************************************************************

RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE
(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)
(c) Copyright 1983-2008 Advanced Engineering Software (aes) Ver. 15.0 Release Date: 04/01/2008 License ID 1204
************************** DESCRIPTION OF STUDY ************************** * PRE -DEVELOPMENT
* 2 YEAR STORM ANALYSIS
* 22-2434 QUAIL 1401
************************************************************************** FILE NAME: 2434E.DAT
TIME/DATE OF STUDY: 10:21 12/13/2022
---------------------------------------------------------------------------- ---------------------------------------------------------------------------- USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
--*TIM E-OF-CONCENTRATION MODEL* --
USER SPECIFIED STORM EVENT(YEAR) = 2.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 3.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.95 *DATA BANK RAINFALL USED*
*ANTECEDENT MOISTURE CONDITION (AMC) I ASSUMED FOR RATIONAL METHOD* *USER -DEFINED STREET -SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL* HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER -GEOMETRIES: MANNING

WIDTH CROSSFALL IN- / OUT -/PARK- HEIGHT WIDTH LIP HIKE FACTOR N0. (FT) (FT) SIDE/SIDE/WAY (FT) (FT) (FT) (FT) (n)
--- ------------------------------- ------ ----- ------ ------------ --- ------------------------------- ------ ----- ------ ------------ 1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0312 0.167 0.0150 GLOBAL STREET FLOW -DEPTH CONSTRAINTS:

1. Relative Flow -Depth = 0.00 FEET
as (Maximum Allowable Street Flow Depth) - (Top -of -Curb)

2. (Depth)* (Velocity) Constraint = 6.0 (FT*FT/S)
*PIPE MAY BE SIZED TO HAVE A FLOW CAPACITY LESS THAN
UPSTREAM TRIBUTARY PIPE.*
*USER -SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED **************************************************************************** FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21 F-49

»»>RATIONAL METHOD INITIAL SUBAREA ANALYSIS«« >USE TIME -OF -CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA ADDITION OF SUBAREA TO MAINLINE PEAK FLOW««< MAINLINE Tc(MIN.) = 9.04
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.611
SUBAREA LOSS RATE DATA(AMC I ):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
COMMERCIAL D 0.50 0.20 0.100 57
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 0.50 SUBAREA RUNOFF(CFS) = 0.72
EFFECTIVE AREA(ACRES) = 1.71 AREA -AVERAGED Fm(INCH/HR) = 0.02 AREA -AVERAGED Fp(INCH/HR) = 0.20 AREA -AVERAGED Ap = 0.10 TOTAL AREA(ACRES) = 1.7 PEAK FLOW RATE(CFS) = 2.45
---------------------------------------------------------------------------- ---------------------------------------------------------------------------- END OF STUDY SUMMARY:

TOTAL AREA(ACRES) = 1.7 TC(MIN.) = 9.04
EFFECTIVE AREA(ACRES) = 1.71 AREA -AVERAGED Fm(INCH/HR)= 0.02 AREA -AVERAGED Fp(INCH/HR) = 0.20 AREA -AVERAGED Ap = 0.100 PEAK FLOW RATE(CFS) = 2.45

END OF RATIONAL METHOD ANALYSIS
F-50

****************************************************************************

SMALL AREA UNIT HYDROGRAPH MODEL
---------------------------------------------------------------------------- (C) Copyright 1989-2008 Advanced Engineering Software (aes) Ver. 15.0 Release Date: 04/01/2008 License ID 1204
Analysis prepared by:
**************************************************************************** Problem Descriptions:

PRE -DEVELOPMENT HYDROGRAPH
2 YEAR STORM ANALYSIS
22-2434 QUAIL 1401
---------------------------------------------------------------------------- RATIONAL METHOD CALIBRATION COEFFICIENT =

0.90 TOTAL CATCHMENT AREA(ACRES)
= 1.71
SOIL -LOSS RATE, Fm,(INCH/HR) = 0.020
LOW LOSS FRACTION = 0.250
TIME OF CONCENTRATION(MIN.)
= 9.04

SMALL AREA PEAK Q COMPUTED

USING PEAK FLOW

RATE FORMULA
ORANGE COUNTY "VALLEY" RAINFALL VALUES ARE
USED
RETURN FREQUENCY(YEARS) =
2 5-MINUTE POINT RAINFALL
VALUE(INCHES) =

0.19 30-MINUTE POINT RAINFALL
VALUE(INCHES) =

0.40 1-HOUR POINT RAINFALL
VALUE(INCHES) =

0.53 3-HOUR POINT RAINFALL
VALUE(INCHES) =

0.89 6-HOUR POINT RAINFALL
VALUE(INCHES) =

1.22 24-HOUR POINT RAINFALL
VALUE(INCHES) =

2.05 TOTAL CATCHMENT RUNOFF VOLUME(ACRE-FEET) = 0.22
TOTAL CATCHMENT SOIL -LOSS VOLUME(ACRE-FEET) = 0.07
**************************************************************************** TIME VOLUME Q 0. 2.5 5.0 7.5 10.0
(HOURS) (AF) (CFS)
----------------------------------------------------------------------------

0.03 0.0000 0.00 Q

0.18 0.0002 0.04 Q

0.33 0.0007 0.04 Q

0.48 0.0012 0.04 Q

0.63 0.0016 0.04 Q

0.78 0.0021 0.04 Q

0.93 0.0026 0.04 Q

1.08 0.0030 0.04 Q

1.23 0.0035 0.04 Q

1.39 0.0040 0.04 Q

1.54 0.0045 0.04 Q

1.69 0.0050 0.04 Q

1.84 0.0055 0.04 Q

1.99 0.0060 0.04 Q
F-51

2.14 0.0065

0.04 Q

2.29 0.0070

0.04 Q

2.44 0.0075

0.04 Q

2.59 0.0080

0.04 Q

2.74 0.0085

0.04 Q

2.89 0.0090

0.04 Q

3.04 0.0095

0.04 Q

3.19 0.0101

0.04 Q

3.34 0.0106

0.04 Q

3.49 0.0111

0.04 Q

3.65 0.0116

0.04 Q

3.80 0.0122

0.04 Q

3.95 0.0127

0.04 Q

4.10 0.0133

0.04 Q

4.25 0.0138

0.04 Q

4.40 0.0144

0.04 Q

4.55 0.0149

0.05 Q

4.70 0.0155

0.05 Q

4.85 0.0161

0.05 Q

5.00 0.0167

0.05 Q

5.15 0.0172

0.05 Q

5.30 0.0178

0.05 Q

5.45 0.0184

0.05 Q

5.60 0.0190

0.05 Q

5.75 0.0196

0.05 Q

5.91 0.0202

0.05 Q

6.06 0.0208

0.05 Q

6.21 0.0214

0.05 Q

6.36 0.0221

0.05 Q

6.51 0.0227

0.05 Q

6.66 0.0233

0.05 Q

6.81 0.0240

0.05 Q

6.96 0.0246

0.05 Q

7.11 0.0253

0.05 Q

7.26 0.0259

0.05 Q

7.41 0.0266

0.05 Q

7.56 0.0273

0.05 Q

7.71 0.0280

0.06 Q

7.86 0.0286

0.06 Q

8.01 0.0293

0.06 Q

8.17 0.0300

0.06 Q

8.32 0.0308

0.06 Q

8.47 0.0315

0.06 Q

8.62 0.0322

0.06 Q

8.77 0.0330

0.06 Q

8.92 0.0337

0.06 Q

9.07 0.0345

0.06 Q

9.22 0.0353

0.06 Q

9.37 0.0360

0.06 Q

9.52 0.0368

0.06 Q

9.67 0.0376

0.06 Q

9.82 0.0385

0.07 Q

9.97 0.0393

0.07 Q

10.12 0.0401

0.07 Q

10.27 0.0410

0.07 Q

10.43 0.0418

0.07 Q

10.58 0.0427

0.07 Q
F-52

10.73 0.0436

0.07 Q

10.88 0.0445

0.07 Q

11.03 0.0455

0.08 Q

11.18 0.0464

0.08 Q

11.33 0.0474

0.08 Q

11.48 0.0484

0.08 Q

11.63 0.0494

0.08 Q

11.78 0.0504

0.08 Q

11.93 0.0515

0.09 Q

12.08 0.0525

0.09 Q

12.23 0.0538

0.11 Q

12.38 0.0552

0.12 Q

12.53 0.0567

0.12 Q

12.69 0.0582

0.12 Q

12.84 0.0598

0.13 Q

12.99 0.0614

0.13 Q

13.14 0.0631

0.14 Q

13.29 0.0648

0.14 Q

13.44 0.0666

0.15 Q

13.59 0.0684

0.15 Q

13.74 0.0704

0.16 Q

13.89 0.0724

0.16 Q

14.04 0.0745

0.17 Q

14.19 0.0767

0.19 Q

14.34 0.0791

0.20 Q

14.49 0.0817

0.21 Q

14.64 0.0843

0.22 Q

14.79 0.0872

0.23 Q

14.95 0.0902

0.26 Q

15.10 0.0935

0.27 Q

15.25 0.0971

0.31 Q

15.40 0.1011

0.33 Q

15.55 0.1053

0.34 Q

15.70 0.1098

0.39 Q

15.85 0.1158

0.58 Q

16.00 0.1244

0.80 Q

16.15 0.1446

2.45 Q.

16.30 0.1627

0.46 Q

16.45 0.1676

0.32 Q

16.60 0.1714

0.29 Q

16.75 0.1747

0.24 Q

16.90 0.1776

0.22 Q

17.05 0.1801

0.19 Q

17.21 0.1824

0.17 Q

17.36 0.1844

0.15 Q

17.51 0.1862

0.14 Q

17.66 0.1880

0.13 Q

17.81 0.1896

0.13 Q

17.96 0.1911

0.12 Q

18.11 0.1925

0.11 Q

18.26 0.1937

0.08 Q

18.41 0.1947

0.08 Q

18.56 0.1957

0.08 Q

18.71 0.1967

0.07 Q

18.86 0.1976

0.07 Q

19.01 0.1985

0.07 Q

19.16 0.1993

0.07 Q
F-53

19.31 0.2002

0.07 Q

19.47 0.2010

0.06 Q

19.62 0.2017

0.06 Q

19.77 0.2025

0.06 Q

19.92 0.2032

0.06 Q

20.07 0.2040

0.06 Q

20.22 0.2047

0.06 Q

20.37 0.2054

0.05 Q

20.52 0.2060

0.05 Q

20.67 0.2067

0.05 Q

20.82 0.2074

0.05 Q

20.97 0.2080

0.05 Q

21.12 0.2086

0.05 Q

21.27 0.2092

0.05 Q

21.42 0.2098

0.05 Q

21.57 0.2104

0.05 Q

21.73 0.2110

0.05 Q

21.88 0.2116

0.05 Q

22.03 0.2121

0.04 Q

22.18 0.2127

0.04 Q

22.33 0.2132

0.04 Q

22.48 0.2138

0.04 Q

22.63 0.2143

0.04 Q

22.78 0.2148

0.04 Q

22.93 0.2153

0.04 Q

23.08 0.2158

0.04 Q

23.23 0.2163

0.04 Q

23.38 0.2168

0.04 Q

23.53 0.2173

0.04 Q

23.68 0.2178

0.04 Q

23.83 0.2182

0.04 Q

23.99 0.2187

0.04 Q

24.14 0.2192

0.04 Q

24.29 ----------------------------------------------------------------------------

0.2194

0.00 Q
F-54

****************************************************************************

RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE
(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)
(c) Copyright 1983-2008 Advanced Engineering Software (aes) Ver. 15.0 Release Date: 04/01/2008 License ID 1204
Analysis prepared by:
************************** DESCRIPTION OF STUDY ************************** * POST -DEVELOPMENT
* 2 YEAR STORM ANALYSIS
* 22-2434 QUAIL 1401
************************************************************************** FILE NAME: 2434P.DAT
TIME/DATE OF STUDY: 17:40 12/12/2022
---------------------------------------------------------------------------- ---------------------------------------------------------------------------- USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
--*TIME-OF-CONCENTRATION MODEL* --
USER SPECIFIED STORM EVENT(YEAR) = 2.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 3.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.95 *DATA BANK RAINFALL USED*
*ANTECEDENT MOISTURE CONDITION (AMC) I ASSUMED FOR RATIONAL METHOD* *USER -DEFINED STREET -SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL* HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER -GEOMETRIES: MANNING

WIDTH CROSSFALL IN- / OUT -/PARK- HEIGHT WIDTH LIP HIKE FACTOR NO. (FT) (FT) SIDE/SIDE/WAY (FT) (FT) (FT) (FT) (n)
--- ------------------------------- ------ ----- ------ ------------ --- ------------------------------- ------ ----- ------ ------------ 1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0312 0.167 0.0150 GLOBAL STREET FLOW -DEPTH CONSTRAINTS:

1. Relative Flow -Depth = 0.00 FEET
as (Maximum Allowable Street Flow Depth) - (Top -of -Curb)

FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21 »»>RATIONAL METHOD INITIAL SUBAREA ANALYSIS«« >USE TIME -OF -CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA COMPUTE PIPE -FLOW TRAVEL TIME THRU SUBAREA«« USING USER -SPECIFIED PIPESIZE (EXISTING ELEMENT)«« ADDITION OF SUBAREA TO MAINLINE PEAK FLOW««< ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- MAINLINE Tc(MIN.) = 6.46
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.954
SUBAREA LOSS RATE DATA(AMC I ):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
F-56

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
APARTMENTS D 0.54 0.20 0.200 57
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200
SUBAREA AREA(ACRES) = 0.54 SUBAREA RUNOFF(CFS) = 0.93
EFFECTIVE AREA(ACRES) = 0.83 AREA -AVERAGED Fm(INCH/HR) = 0.04 AREA -AVERAGED Fp(INCH/HR) = 0.20 AREA -AVERAGED Ap = 0.20 TOTAL AREA(ACRES) = 0.8 PEAK FLOW RATE(CFS) = 1.43
**************************************************************************** FLOW PROCESS FROM NODE 11.10 TO NODE 30.00 IS CODE = 41 »»>COMPUTE PIPE -FLOW TRAVEL TIME THRU SUBAREA«« USING USER -SPECIFIED PIPESIZE (EXISTING ELEMENT)«« MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 «« CLEAR THE MAIN -STREAM MEMORY«« RATIONAL METHOD INITIAL SUBAREA ANALYSIS«« >USE TIME -OF -CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- INITIAL SUBAREA FLOW-LENGTH(FEET) = 135.00
ELEVATION DATA: UPSTREAM(FEET) = 51.50 DOWNSTREAM(FEET) = 49.10 F-57

Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.161
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 2.223
SUBAREA Tc AND LOSS RATE DATA(AMC I ):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
APARTMENTS D 0.31 0.20 0.200 57 5.16
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200
SUBAREA RUNOFF(CFS) = 0.61
TOTAL AREA(ACRES) = 0.31 PEAK FLOW RATE(CFS) = 0.61
**************************************************************************** FLOW PROCESS FROM NODE 21.00 TO NODE 21.10 IS CODE = 41 ---------------------------------------------------------------------------- »»>COMPUTE PIPE -FLOW TRAVEL TIME THRU SUBAREA«« USING USER -SPECIFIED PIPESIZE (EXISTING ELEMENT)«« ADDITION OF SUBAREA TO MAINLINE PEAK FLOW««< ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- MAINLINE Tc(MIN.) = 6.19
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 2.002
SUBAREA LOSS RATE DATA(AMC I ):

DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS

LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
APARTMENTS D 0.57 0.20 0.200 57
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.200
SUBAREA AREA(ACRES) = 0.57 SUBAREA RUNOFF(CFS) = 1.01
EFFECTIVE AREA(ACRES) = 0.88 AREA -AVERAGED Fm(INCH/HR) = 0.04 AREA -AVERAGED Fp(INCH/HR) = 0.20 AREA -AVERAGED Ap = 0.20 F-58

TOTAL AREA(ACRES) = 0.9 PEAK FLOW RATE(CFS) = 1.55
**************************************************************************** FLOW PROCESS FROM NODE 21.10 TO NODE 30.00 IS CODE = 41 »»>COMPUTE PIPE -FLOW TRAVEL TIME THRU SUBAREA«« USING USER -SPECIFIED PIPESIZE (EXISTING ELEMENT)«« CONFLUENCE MEMORY BANK # 1 WITH THE MAIN -STREAM MEMORY««< ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 1.55 6.30 1.982 0.20( 0.04) 0.20 0.9 20.00
LONGEST FLOWPATH FROM NODE 20.00 TO NODE 30.00 = 490.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 1.43 6.63 1.925 0.20( 0.04) 0.20 0.8 10.00
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 30.00 = 524.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 2.95 6.30 1.982 0.20( 0.04) 0.20 1.7 20.00
2 2.94 6.63 1.925 0.20( 0.04) 0.20 1.7 10.00
TOTAL AREA(ACRES) = 1.7
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:

F-59

PEAK FLOW RATE(CFS) = 2.95 Tc(MIN.) = 6.303
EFFECTIVE AREA(ACRES) = 1.67 AREA -AVERAGED Fm(INCH/HR) = 0.04 AREA -AVERAGED Fp(INCH/HR) = 0.20 AREA -AVERAGED Ap = 0.20 TOTAL AREA(ACRES) = 1.7
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 30.00 = 524.00 FEET.

END OF STUDY SUMMARY:

TOTAL AREA(ACRES) = 1.7 TC(MIN.) = 6.30
EFFECTIVE AREA(ACRES) = 1.67 AREA -AVERAGED Fm(INCH/HR)= 0.04 AREA -AVERAGED Fp(INCH/HR) = 0.20 AREA -AVERAGED Ap = 0.200 PEAK FLOW RATE(CFS) = 2.95
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 2.95 6.30 1.982 0.20( 0.04) 0.20 1.7 20.00
2 2.94 6.63 1.925 0.20( 0.04) 0.20 1.7 10.00
----------------------------------------------------------- -----------------------------------------------------------

END OF RATIONAL METHOD ANALYSIS
F-60

****************************************************************************

POST -DEVELOPMENT HYDROGRAPH
2 YEAR STORM ANALYSIS
22-2434 QUAIL 1401
---------------------------------------------------------------------------- RATIONAL METHOD CALIBRATION COEFFICIENT =

0.90 TOTAL CATCHMENT AREA(ACRES)
= 1.71
SOIL -LOSS RATE, Fm,(INCH/HR) = 0.040
LOW LOSS FRACTION = 0.250
TIME OF CONCENTRATION(MIN.)
= 6.30

SMALL AREA PEAK Q COMPUTED

USING PEAK FLOW

RATE FORMULA
ORANGE COUNTY "VALLEY" RAINFALL VALUES ARE
USED
RETURN FREQUENCY(YEARS) =
2 5-MINUTE POINT RAINFALL
VALUE(INCHES) =

0.19 30-MINUTE POINT RAINFALL
VALUE(INCHES) =

0.40 1-HOUR POINT RAINFALL
VALUE(INCHES) =

0.53 3-HOUR POINT RAINFALL
VALUE(INCHES) =

0.89 6-HOUR POINT RAINFALL
VALUE(INCHES) =

1.22 24-HOUR POINT RAINFALL
VALUE(INCHES) =

2.05 TOTAL CATCHMENT RUNOFF VOLUME(ACRE-FEET) = 0.21
TOTAL CATCHMENT SOIL -LOSS VOLUME(ACRE-FEET) = 0.08
**************************************************************************** TIME VOLUME Q 0. 2.5 5.0 7.5 10.0
(HOURS) (AF) (CFS)
----------------------------------------------------------------------------

0.04 0.0000 0.00 Q

0.14 0.0002 0.04 Q

0.25 0.0005 0.04 Q

0.35 0.0008 0.04 Q

0.46 0.0011 0.04 Q

0.56 0.0015 0.04 Q

0.67 0.0018 0.04 Q

0.77 0.0021 0.04 Q

0.88 0.0024 0.04 Q
F-61

0.98 0.0028

0.04 Q

1.09 0.0031

0.04 Q

1.19 0.0034

0.04 Q

1.30 0.0038

0.04 Q

1.40 0.0041

0.04 Q

1.51 0.0045

0.04 Q

1.61 0.0048

0.04 Q

1.72 0.0051

0.04 Q

1.82 0.0055

0.04 Q

1.93 0.0058

0.04 Q

2.03 0.0062

0.04 Q

2.14 0.0065

0.04 Q

2.24 0.0069

0.04 Q

2.35 0.0072

0.04 Q

2.45 0.0076

0.04 Q

2.56 0.0079

0.04 Q

2.66 0.0083

0.04 Q

2.77 0.0086

0.04 Q

2.87 0.0090

0.04 Q

2.98 0.0094

0.04 Q

3.08 0.0097

0.04 Q

3.19 0.0101

0.04 Q

3.29 0.0105

0.04 Q

3.40 0.0108

0.04 Q

3.50 0.0112

0.04 Q

3.61 0.0116

0.04 Q

3.71 0.0119

0.04 Q

3.82 0.0123

0.04 Q

3.92 0.0127

0.04 Q

4.03 0.0131

0.04 Q

4.13 0.0135

0.04 Q

4.24 0.0139

0.04 Q

4.34 0.0142

0.04 Q

4.45 0.0146

0.05 Q

4.55 0.0150

0.05 Q

4.66 0.0154

0.05 Q

4.76 0.0158

0.05 Q

4.87 0.0162

0.05 Q

4.97 0.0166

0.05 Q

5.08 0.0170

0.05 Q

5.18 0.0174

0.05 Q

5.29 0.0178

0.05 Q

5.39 0.0182

0.05 Q

5.50 0.0187

0.05 Q

5.61 0.0191

0.05 Q

5.71 0.0195

0.05 Q

5.82 0.0199

0.05 Q

5.92 0.0203

0.05 Q

6.02 0.0208

0.05 Q

6.13 0.0212

0.05 Q

6.23 0.0216

0.05 Q

6.34 0.0221

0.05 Q

6.44 0.0225

0.05 Q

6.55 0.0229

0.05 Q

6.65 0.0234

0.05 Q

6.76 0.0238

0.05 Q

6.86 0.0243

0.05 Q
F-62

6.97 0.0247

0.05 Q

7.07 0.0252

0.05 Q

7.18 0.0257

0.05 Q

7.28 0.0261

0.05 Q

7.39 0.0266

0.05 Q

7.49 0.0271

0.05 Q

7.60 0.0275

0.05 Q

7.70 0.0280

0.06 Q

7.81 0.0285

0.06 Q

7.91 0.0290

0.06 Q

8.02 0.0295

0.06 Q

8.12 0.0300

0.06 Q

8.23 0.0305

0.06 Q

8.34 0.0310

0.06 Q

8.44 0.0315

0.06 Q

8.55 0.0320

0.06 Q

8.65 0.0325

0.06 Q

8.76 0.0330

0.06 Q

8.86 0.0335

0.06 Q

8.96 0.0341

0.06 Q

9.07 0.0346

0.06 Q

9.18 0.0351

0.06 Q

9.28 0.0357

0.06 Q

9.38 0.0362

0.06 Q

9.49 0.0368

0.06 Q

9.60 0.0373

0.07 Q

9.70 0.0379

0.07 Q

9.80 0.0385

0.07 Q

9.91 0.0391

0.07 Q

10.01 0.0396

0.07 Q

10.12 0.0402

0.07 Q

10.23 0.0408

0.07 Q

10.33 0.0414

0.07 Q

10.43 0.0420

0.07 Q

10.54 0.0427

0.07 Q

10.65 0.0433

0.07 Q

10.75 0.0439

0.07 Q

10.85 0.0446

0.07 Q

10.96 0.0452

0.08 Q

11.06 0.0459

0.08 Q

11.17 0.0465

0.08 Q

11.27 0.0472

0.08 Q

11.38 0.0479

0.08 Q

11.48 0.0486

0.08 Q

11.59 0.0493

0.08 Q

11.70 0.0500

0.08 Q

11.80 0.0507

0.08 Q

11.90 0.0515

0.09 Q

12.01 0.0522

0.09 Q

12.11 0.0531

0.11 Q

12.22 0.0540

0.11 Q

12.32 0.0549

0.11 Q

12.43 0.0559

0.11 Q

12.53 0.0569

0.11 Q

12.64 0.0579

0.12 Q

12.74 0.0589

0.12 Q

12.85 0.0599

0.12 Q
F-63

12.95 0.0610

0.12 Q

13.06 0.0620

0.12 Q

13.16 0.0631

0.13 Q

13.27 0.0642

0.13 Q

13.38 0.0654

0.13 Q

13.48 0.0665

0.13 Q

13.59 0.0677

0.14 Q

13.69 0.0689

0.14 Q

13.80 0.0702

0.15 Q

13.90 0.0714

0.15 Q

14.01 0.0727

0.15 Q

14.11 0.0741

0.16 Q

14.22 0.0755

0.17 Q

14.32 0.0770

0.17 Q

14.43 0.0785

0.18 Q

14.53 0.0801

0.18 Q

14.63 0.0817

0.20 Q

14.74 0.0835

0.20 Q

14.85 0.0853

0.22 Q

14.95 0.0872

0.23 Q

15.05 0.0893

0.25 Q

15.16 0.0914

0.26 Q

15.27 0.0938

0.29 Q

15.37 0.0964

0.30 Q

15.48 0.0990

0.29 Q

15.58 0.1016

0.32 Q

15.68 0.1047

0.40 Q

15.79 0.1085

0.47 Q

15.90 0.1135

0.69 Q

16.00 0.1207

0.96 Q

16.10 0.1379

3.00 Q

16.21 0.1533

0.55 Q

16.32 0.1572

0.35 Q

16.42 0.1601

0.30 Q

16.52 0.1625

0.27 Q

16.63 0.1647

0.24 Q

16.73 0.1667

0.21 Q

16.84 0.1684

0.19 Q

16.94 0.1700

0.18 Q

17.05 0.1714

0.16 Q

17.16 0.1728

0.15 Q

17.26 0.1741

0.14 Q

17.36 0.1753

0.14 Q

17.47 0.1764

0.13 Q

17.58 0.1776

0.13 Q

17.68 0.1786

0.12 Q

17.78 0.1797

0.12 Q

17.89 0.1807

0.11 Q

17.99 0.1816

0.11 Q

18.10 0.1825

0.09 Q

18.20 0.1832

0.08 Q

18.31 0.1840

0.08 Q

18.42 0.1847

0.08 Q

18.52 0.1854

0.08 Q

18.62 0.1860

0.08 Q

18.73 0.1867

0.07 Q

18.83 0.1873

0.07 Q
F-64

18.94 0.1879

0.07 Q

19.05 0.1885

0.07 Q

19.15 0.1891

0.07 Q

19.26 0.1897

0.07 Q

19.36 0.1903

0.06 Q

19.47 0.1908

0.06 Q

19.57 0.1914

0.06 Q

19.67 0.1919

0.06 Q

19.78 0.1924

0.06 Q

19.89 0.1929

0.06 Q

19.99 0.1934

0.06 Q

20.09 0.1939

0.06 Q

20.20 0.1944

0.06 Q

20.31 0.1949

0.06 Q

20.41 0.1954

0.05 Q

20.52 0.1959

0.05 Q

20.62 0.1963

0.05 Q

20.73 0.1968

0.05 Q

20.83 0.1972

0.05 Q

20.93 0.1977

0.05 Q

21.04 0.1981

0.05 Q

21.14 0.1985

0.05 Q

21.25 0.1989

0.05 Q

21.36 0.1994

0.05 Q

21.46 0.1998

0.05 Q

21.57 0.2002

0.05 Q

21.67 0.2006

0.05 Q

21.77 0.2010

0.05 Q

21.88 0.2014

0.05 Q

21.98 0.2018

0.04 Q

22.09 0.2022

0.04 Q

22.19 0.2025

0.04 Q

22.30 0.2029

0.04 Q

22.41 0.2033

0.04 Q

22.51 0.2037

0.04 Q

22.61 0.2040

0.04 Q

22.72 0.2044

0.04 Q

22.83 0.2047

0.04 Q

22.93 0.2051

0.04 Q

23.03 0.2055

0.04 Q

23.14 0.2058

0.04 Q

23.25 0.2061

0.04 Q

23.35 0.2065

0.04 Q

23.45 0.2068

0.04 Q

23.56 0.2072

0.04 Q

23.67 0.2075

0.04 Q

23.77 0.2078

0.04 Q

23.88 0.2081

0.04 Q

23.98 0.2085

0.04 Q

24.08 0.2088

0.04 Q

24.19 ----------------------------------------------------------------------------

0.2090

0.00 Q
F-65

ATTACHMENT C

ORANGE COUNTY RAINFALL ZONES MAP
F-66

GEOTECHNICAL BORING LOG LB-1
Project No.
13542.001
Date Drilled
5-20-22
Project
Intracorp Quail St
Logged By
LFO
Drilling Co.

Martini Drilling Corp
Hole Diameter
8"
Drilling Method
Hollow Stem Auger - 1401b - Autohammer - 30" Drop
Ground Elevation
44'
Location
See Figure 2 - Geotechnical Map
Sampled By
LFO
c
0 SOIL DESCRIPTION
y
O�
��
V
0 Z
OM
U)
o
iY
�;-.

BB-1
@Surface: 3" asphalt over 8" CLAY w/ Sand base
---
----
---------------------------------------------
Undocumented Artificial Fill (Afu)
R-1
12 SM
@2': Silty SAND, reddish brown, medium dense, predominantly 9 fine sand, trace medium and coarse sand, some rootlets, 9 slightly moist
40 ---
---
--
--
--
--
— — — — — — — — — — — — — — — — — — — — — — — — — — — - R-2
4 CL
@4': Sandy CLAY, dark yellow brown, very stiff, fine sand, low 5 9
plasticity, weakly laminated, moist
11 R-3
5 CL
@6': Sandy CLAY, reddish brown, very stiff, fine sand, low to 11 medium plasticity, laminated, moist
12 R-4
6 CL
@8': CLAY, reddish brown mottled gray, very stiff, some fine 35 8
sand, low to medium plasticity, trace MnO, moist
13 10
R-5
8 CL
@10': CLAY, reddish brown mottled gray, very stiff, some fine 13 sand, low to medium plasticity, some MnO and carbonate 21 blebs, moist
30 15
S-6
3 CL
@15': CLAY, gray brown mottled white, very stiff, trace fine 5 sand, low plasticity, large carbonate blebs, moist
10 25
20 R-7
14 ML
@20': Sandy SILT, gray brown mottled yellow and orange
20 (heavily Fe -stained), dense, predominantly fine sand, trace 28 medium sand, friable, very moist
20 25
S-8
4 SP
@25': Poorly -graded SAND, gray brown, dense, predominantly 8 medium sand, trace fine and coarse sand, Fe -stained, 16 micaceous, friable, wet
15 SAMPLE TYPES: TYPE OF TESTS:

B BULK SAMPLE -200 % FINES PASSING DS DIRECT SHEAR SA SIEVE ANALYSIS C CORE SAMPLE AL ATTERBERG LIMITS El EXPANSION INDEX SE SAND EQUIVALENT G GRAB SAMPLE CN CONSOLIDATION H HYDROMETER SG SPECIFIC GRAVITY f1/ Leig hton

R RING SAMPLE CO COLLAPSE MD MAXIMUM DENSITY UC UNCONFINED COMPRESSIVE

S SPLIT SPOON SAMPLE CR CORROSION PP POCKET PENETROMETER STRENGTH

T TUBE SAMPLE CU UNDRAINED TRIAXIAL RV R VALUE
* * * This log is a part of a report by Leighton and should not be used as a stand-alone document. * * * Page 1 of 2 F-68

GEOTECHNICAL BORING LOG LB-1
Project No.
13542.001
Date Drilled
5-20-22
Project
Intracorp Quail St
Logged By
LFO
Drilling Co.

Borehole backfilled with soil cuttings and patched with -10
cold -patch asphalt.
55 -15
SAMPLE TYPES: TYPE OF TESTS:

R RING SAMPLE CO COLLAPSE MD MAXIMUM DENSITY UC UNCONFINED COMPRESSIVE

S SPLIT SPOON SAMPLE CR CORROSION PP POCKET PENETROMETER STRENGTH

T TUBE SAMPLE CU UNDRAINED TRIAXIAL RV R VALUE
* * * This log is a part of a report by Leighton and should not be used as a stand-alone document. * * * Page 2 of 2 F-69

GEOTECHNICAL BORING LOG LB-2
Project No.
13542.001
Date Drilled
5-20-22
Project
Intracorp Quail St
Logged By
LFO
Drilling Co.

Martini Drilling Corp
Hole Diameter
8"
Drilling Method
Hollow Stem Auger - 1401b - Autohammer - 30" Drop
Ground Elevation
43'
Location
See Figure 2 - Geotechnical Map
Sampled By
LFO
c
0 SOIL DESCRIPTION
y
O�
��
V
0 Z
OM
U)
o
iY
�;-.

0.p
gradual.
0 �-
BB-1
@Surface: 8" asphalt over 4" CLAY w/ Sand base
— — —
— — —
--
--
--
--
----------------------------
Undocumented Artificial Fill (Afu)
R-1
6 SM
@2': Silty SAND, reddish brown, medium dense, fine sand, trace 40 8
clay, slightly moist
10 — — —
— — —
R-2
— —
10 — —
— —
— —
CL
— — — — — — — — — — — — — — — — — — — — — — — — — — — - @4': Sandy CLAY, reddish brown mottled gray, very stiff, fine 5 12
sand, trace MnO, moist
14 R-3
7 SM
@6': Silty SAND, orange brown, dense, predominantly fine sand, 14 trace medium sand, friable, moist
23 35
R-4
8 CL
@8': Lean CLAY, reddish brown, hard, low plasticity, some MnO 16 stringers, moist
23 10
R-5
7 CL
@10': Lean CLAY, reddish brown, very stiff, low plasticity, some 13 MnO blebs, moist
21 30
15 S-6
3 CL
@15': Sandy CLAY, gray brown, very stiff, fine sand, low 6 plasticity, abundant carbonate blebs, moist
12 25
20 R-7
13 ML
@20': Sandy SILT, gray brown mottled orange from Fe -staining, 20 dense, fine sand, weakly laminated, friable, moist
25 20
25 S-8
5 SP
@25': Poorly -graded SAND, graybrown mottled orange from 13 Fe -staining, dense, predominantly fine to medium sand, trace 20 coarse sand, very moist
T.D. 26.5 feet bgs
15 Groundwater encountered at 25 feet bgs.

Borehole backfilled with soil cuttings and patched with cold -patch asphalt.
g�
SAMPLE TYPES: TYPE OF TESTS:

R RING SAMPLE CO COLLAPSE MD MAXIMUM DENSITY UC UNCONFINED COMPRESSIVE

S SPLIT SPOON SAMPLE CR CORROSION PP POCKET PENETROMETER STRENGTH

T TUBE SAMPLE CU UNDRAINED TRIAXIAL RV R VALUE
* * * This log is a part of a report by Leighton and should not be used as a stand-alone document. * * * Page 1 of 1 F-70

GEOTECHNICAL BORING LOG LB-3
Project No.
13542.001
Date Drilled
5-20-22
Project
Intracorp Quail St
Logged By
LFO
Drilling Co.

Martini Drilling Corp
Hole Diameter
8"
Drilling Method
Hollow Stem Auger - 1401b - Autohammer - 30" Drop
Ground Elevation
42'
Location
See Figure 2 - Geotechnical Map
Sampled By
LFO
c
0 SOIL DESCRIPTION
y
O�
��
V
0 Z
OM
U)
o
iY
�;-.

MCI)
4)
Q.y
Q.p
Q
C
y
q
UV
This Soil Description applies only to a location of the exploration at the >
4)
w J
p s?.
+r
time of sampling. Subsurface conditions may differ at other locations O
W
cLL
E
M
m
s',
o
_uj
o�
and may change with time. The description is a simplification of the 4)
Q
d
p
C.)0)
-
actual conditions encountered. Transitions between soil types may be >,
gradual.
0 BB-1
@Surface: 4" asphalt over 4" CLAY base
---
---
--
--
-------------------------------------
Undocumented Artificial Fill (Afu)
40 R-1
5 SM
@3': Silty SAND, yellow brown, dense, predominantly fine sand, 13 trace medium sand, trace clay, weakly laminated, moist 22 5
— — —
— — —
--
--
--
--
— — — — — — — — — — — — — — — — — — — — — — — — — — — - R-2
9 SC
@5': Clayey SAND, gray yellow brown, medium dense, fine 14 sand, low plasticity, moist
21 35
R-3
7 CL
@7': Sandy CLAY, orange brown, very stiff, fine sand, low 13 plasticity, trace MnO, some carbonate blebs, slightly moist 19 10
R-4
6 CL
@10': Sandy CLAY, reddish brown mottled gray brown, very 14 stiff, fine sand, low plasticity, slightly moist
20 30
15 R-5
6 CL
@15': Sandy CLAY, gray brown, very stiff, fine sand, low 10 plasticity, abundant carbonate blebs, slightly moist 15 25
SM
@17': Changes to yellow Silty SAND in tailings
20 S-6
4 SM
@20': Silty SAND, gray mottled yellow and orange from
8 Fe -staining, medium dense, fine sand, trace clay, friable, very 9 moist
20 25
S-7
7 SP
@25': Poorly -graded SAND, gray brown, very dense, fine sand, 17 friable, micaceous, very moist
21 15
T.D. 26.5 feet bgs
Groundwater encountered at 25 feet bgs.

Borehole backfilled with soil cuttings and patched with cold -patch asphalt.
g�
SAMPLE TYPES: TYPE OF TESTS:

R RING SAMPLE CO COLLAPSE MD MAXIMUM DENSITY UC UNCONFINED COMPRESSIVE

S SPLIT SPOON SAMPLE CR CORROSION PP POCKET PENETROMETER STRENGTH

T TUBE SAMPLE CU UNDRAINED TRIAXIAL RV R VALUE
* * * This log is a part of a report by Leighton and should not be used as a stand-alone document. * * * Page 1 of 1 F-71

GEOTECHNICAL BORING LOG LP-1
Project No.
13542.001
Date Drilled
5-20-22
Project
Intracorp Quail St
Logged By
LFO
Drilling Co.

Martini Drilling Corp
Hole Diameter
8"
Drilling Method
Hollow Stem Auger - 1401b - Autohammer - 30" Drop
Ground Elevation
41'
Location
See Figure 2 - Geotechnical Map
Sampled By
LFO
c
0 SOIL DESCRIPTION
y
O�
��
V
0 Z
OM
U)
o
iY
�;-.

MCI)
4)
Q.y
Q.p
Q
C
y
q
UV
This Soil Description applies only to a location of the exploration at the >
4)
w J
p s?.
+r
time of sampling. Subsurface conditions may differ at other locations O
W
cLL
E
M
m
s',
o
_uj
o�
and may change with time. The description is a simplification of the 4)
Q
p
C.)Il
0) -
actual conditions encountered. Transitions between soil types may be >,
gradual.
0 ��
BB-1
@Surface: 4" asphalt over 5" CLAY base
40 ---
---
--
--
--
--
— — — — — — — — — — — — — — — — — — — — — — — — — — — - Undocumented Artificial Fill (Afu)
Silty SAND w/ Clay, yellow brown, fine sand, low plasticity, friable, slightly moist
5 ---
—
R 1
—
--
--
—
SP-
— — — -- — -- — — -
@5': Poorly -graded SAND w/ Silt and Clay, yellow brown, dense, 35 14
fine sand, low plasticity, friable, slightly moist
22 R-2
7 SP-SM
@7': Poorly -graded SAND w/ Silt, yellow brown, medium dense, 11 predominantly fine sand, trace medium sand, trace clay, 15 slightly moist
10 R-3
8 SP
@10': Poorly -graded SAND, orange brown, predominantly fine to 30 13
medium sand, medium dense, micaceous, friable, slightly 19 moist
@11': Lean CLAY, orange brown mottled gray brown, low
plasticity, trace MnO staining, moist
15 R-4
7 CL
@15': Lean CLAY, gray, very stiff, low plasticity, abundant 25 BB-2
12 carbonate blebs, moist
18 20
S-5
4 SP
@20': Poorly -graded SAND, mustard yellow, medium dense, 20 9
predominantly fine sand, friable, micaceous, moist
10 T.D. 21.5 feet bgs
No groundwater encountered during drilling.

Borehole backfilled with soil cuttings and patched with cold -patch asphalt.
25 15
SAMPLE TYPES: TYPE OF TESTS:

R RING SAMPLE CO COLLAPSE MD MAXIMUM DENSITY UC UNCONFINED COMPRESSIVE

S SPLIT SPOON SAMPLE CR CORROSION PP POCKET PENETROMETER STRENGTH

T TUBE SAMPLE CU UNDRAINED TRIAXIAL RV R VALUE
* * * This log is a part of a report by Leighton and should not be used as a stand-alone document. * * * Page 1 of 1 F-72

Project Number:

Project Name:

Earth Description:

Liquid Description:

Tested By:

Time Interval Standard
Start Time for Pre -Soak:

Start Time for Standard:

Standard Time Interval
Between Readings, mins:

Borine Percolation Test Data Sheet
13542.001
IntraCorp Quail Street
Alluvium
Tap water

BTM/LFO
8:21 AM
8:59 AM
13 5
Test Hole Number: LP-1
Date Excavated: 5/20/2022
Date Tested: 5/20/2022
Depth of boring (ft): 20
Radius of boring (in): 4
Radius of casing (in): 1
Length of slotted of casing (ft):

Depth to Initial Water Depth (ft):

Porosity of Annulus Material, n :

Bentonite Plug at Bottom:

Field Percolation Data - Falling Head Test
Reading
Time
Time Interval,
At (min.)
Initial/Final
Depth to
Water (ft.)
Initial/Final
Water Height,
Ho/Hf
(in.)
Total Water
Drop, Ad (in.)
Infiltration
Rate (in./hr.)
P1
8:21
13 15.00

60.0 54.0

5.56 8:34

19.50 6.0
P2
8:39
15 15.00

60.0 54.0

4.99 8:55

19.50 6.0
1 8:59
5 15.00

60.0 27.8

5.43 9:04

17.32 32.2
2 9:06
5 15.00

60.0 28.3

5.55 9:11

17.36 31.7
3 9:12
5 15.00

60.0 28.9

5.70 9:17

17.41 31.1
4 9:19
5 15.00

60.0 28.7

5.64 9:24

17.39 31.3
5 9:25
5 15.00

60.0 29.0

5.73 9:30

17.42 31.0
6 9:32
5 15.00

60.0 28.6

5.61 9:37

17.38 31.4
7 9:38
5 15.00

60.0 28.6

5.61 9:43

17.38 31.4
8 9:45
5 15.00

60.0 29.0

5.73 9:50

17.42 31.0
9 9:54
5 15.00

60.0 28.8

5.67 9:59

17.40 31.2
10 10:02
5 15.00

60.0 25.4

4.84 10:07

17.12 34.6
11 10:09
5 15.00

60.0 29.8

5.92 10:14

17.48 30.2
12 10:16
5 15.00

60.0 29.3

5.80 10:21

17.44 30.7
13 10:24
5 15.00

60.0 29.4

5.83 10:29

17.45 30.6
14 10:30
5 15.00

60.0 30.1

6.02 10:35

17.51 29.9
15 10:38
5 15.00

60.0 29.9

5.95 10:43

17.49 30.1
16 10:44
5 15.00

60.0 29.4

5.83 10:49

17.45 30.6
17 10:52
5 15.00

60.0 30.0

5.98 10:57

17.50 30.0
18 10:58
5 15.00

60.0 28.9

5.70 11:03

17.41 31.1
19 10:07
5 15.00

60.0 28.9

5.70 11:12

17.41 31.1
20 11:13
5 15.00

60.0 28.9

5.70 11:18

17.41 31.1
17 11:19
5 15.00

60.0 30.5

6.11 11:24

17.54 29.5
18 11:27
5 15.00

60.0 30.4

6.08 11:32

17.53 29.6
19 11:35
5 15.00

60.0 30.8

6.21 11:40

17.57 29.2
20 11:41
5 15.00

60.0 30.8

6.21 11:46

17.57 29.2
21 11:48
5 15.00

60.0 30.0

5.98 11:53

17.50 30.0
22 11:54
5 15.00

60.0 30.1

6.02 11:59

17.51 29.9
Infiltration Rate (1) = Discharge Volume/Surface Area of Test Section/Time Interval Measured Infiltration Rate, I (Average of Last 3 Readings) = 6.07 5 0.35
No
in./hr.

F-73

ATTACHMENT E

EDUCATIONAL MATERIALS
F-74

For more information,
please call the
Orange County Stormwater Program
at 1-877-89-SPILL (1-877-897-7455)
or visit
www.ocwatersheds.com
To report a spill,
call the
Orange County 24-Hour
Water Pollution Problem
Reporting Hotline
at 1-877-89-SPILL (1-877-897-7455) .

For emergencies, dial 911.

The tips contained in this brochure provide useful
information to help prevent water pollution. If
you have other suggestions, please contact your
city's stormwater representatives or call the Orange
County Stormwater Program.

Sk _«1
Printed on Recycled Paper
'The OC4an 114�1115 ` 4ti
at Your Front Door
�.:
i�Lti�Yl
fit::

Pool Maintenance
All pool water discharged to the curb, gutter or
permitted pool drain from your property must meet the
following water quality criteria:

The residual chlorine does not exceed

0.1 mg/L (parts per
million) .

The pH is between

6.5 and 8.5.

The water is free
of any unusual
coloration.

There is no discharge
of filter media or acid
cleaning wastes.

Some cities have ordinances that do not allow pool
water to be discharged to the storm drain. Check with
your city.

Landscape and
Hardscape Drains
The following recommendations will help reduce or
prevent pollutants from your landscape and hardscape
drains from entering the street, gutter or storm drain.

Unlike water that enters the sewer (from sinks and
toilets), water that enters a landscape or hardscape
drain is not treated before entering our creeks, rivers, bays and ocean.

Household Activities
■ Do not rinse spills of materials or chemicals to any
drain.
■ Use dry cleanup methods such as applying cat
litter or another absorbent material, then sweep it
up and dispose of it in the trash. If the material is
hazardous, dispose of it at a Household Hazardous
Waste Collection Center (HHWCC). For locations,
call (714) 834-6752 or visit www.oclandfills.com .
■ Do not hose down your driveways, sidewalks or
patios to your landscape or hardscape drain.

Sweep up debris and dispose of it in the trash.
■ Always pick up after your pet. Flush waste down
the toilet or dispose of it in the trash.
■ Do not store items such as cleaners, batteries,
automotive fluids, paint products, TVs, or
computer monitors uncovered outdoors. Take
them to a HHWCC for disposal.

Yard Maintenance
■ Do not overwater. Water by hand or set
automated irrigation systems to reflect seasonal
water needs.
■ Follow directions on
pesticides and fertilizers
(measure, do not estimate
amounts) and do not use
if rain is predicted within
48 hours.
■ Cultivate your garden
often to control weeds
and reduce the need to
use chemicals.

Vehicle Maintenance
■ Never pour oil or antifreeze down your
landscape or hardscape drain. Recycle these
substances at a service station, a waste collection
center or used oil recycling center. For
locations, contact the Used Oil Program at 1-800-
CLEANUP or visit www.CLEANUP.org .
■ Whenever possible, take your vehicle to a
commercial car wash.
■ If you do wash your vehicle at home, do not
allow the washwater to go down your landscape
or hardscape drain. Instead, dispose of it in
the sanitary sewer (a sink or toilet) or onto an
absorbent surface such as your lawn.
■ Use a spray nozzle that will shut off the water
when not in use.

j
lean beaches and healthy
creeks, rivers, bays and
ocean are important
to Orange County. However,
many common activities such as
pest control can lead to water
pollution if you're not careful.

Pesticide treatments must be
planned and applied properly
to ensure that pesticides do
not enter the street, gutter or
storm drain. Unlike water in
sanitary sewers (from sinks and
toilets), water in storm drains is
not treated before entering our
waterways.

You would never dump pesticides
into the ocean, so don't let it
enter the storm drains. Pesticides
can cause significant damage
to our environment if used
improperly. If you are thinking
of using a pesticide to control a
pest, there are some important
things to consider.

Help Prevent Ocean Pollution:

Responsible
Pest Control
).anegins
iffronfflm

Key Steps to Follow:

St 1: Correctly identify the pest (insect,
weed, rodent, or disease) and verify that it is
actually causing the problem.

This is important
because beneficial
insects are often
mistaken for pests
and sprayed with
pesticides needlessly.

Three life stages of the common lady Consult with a
beetle, a beneficial insect.

Certified Nursery
Professional at a local nursery or garden center
or send a sample of the pest to the Orange
County Agricultural Commissioner's Office.

Determine if the pest is still present — even
though you see damage, the pest may have left.

Step 2: Determine
how many pests are
present and causing
damage.

Small pest populations
may be controlled
more safely using non -
pesticide techniques. These include removing
food sources, washing off leaves with a strong
stream of water, blocking entry into the home
using caulking and replacing problem plants
with ones less susceptible to pests.

Integrated Pest Management (IPM)
usually combines several least toxic pest
control methods for long-term prevention
and management of pest problems
without harming you, your family,
University r or the environment.

California
fmpera�ve Earemioo
St 3: If a pesticide must be used, choose
the Feast toxic chemical.

Obtain information on the least toxic pesticides
that are effective at controlling the target
pest from the UC Statewide Integrated Pest
Management (IPM) Program's Web site at
www.ipm.ucdavis.edu .

Seek out the assistance of a Certified Nursery
Professional at a local nursery or garden center
when selecting a pesticide. Purchase the
smallest amount of pesticide available.

Apply the pesticide to the pest during its most
vulnerable life stage. This information can be
found on the pesticide label.

Step 4: Wear appropriate protective clothing.

Follow pesticide labels regarding specific types
of protective equipment you should wear.

Protective clothing should always be washed
separately from other clothing.

S 5: Continuously monitor external
conditions when applying pesticides such as
weather, irrigation, and the presence of children
and animals.

Never apply pesticides when rain is predicted
within the next 48 hours. Also, do not water
after applying pesticides unless the directions say
it is necessary.

Apply pesticides when the air is still; breezy
conditions may cause the spray or dust to drift
away from your targeted area.

In case of an emergency call 911 and/or the
regional poison control number at
(714) 634-5988 or (800) 544-4404 (CA only).

F-78
For general questions you may also visit
www.calpoison.org .

Step 6: In the event of accidental spills,
sweep up or use an absorbent agent to remove
any excess pesticides. Avoid the use of water.

Be prepared. Have a broom, dust pan, or dry
absorbent material, such as cat litter, newspapers
or paper towels, ready to assist in cleaning up
spills.

Contain and clean up the spill right away. Place
contaminated materials in a doubled plastic bag.

All materials used to clean up the spill should
be properly disposed of according to your local
Household Hazardous Waste Disposal site.

Step / : Properly store and dispose of unused
pesticides.

Purchase Ready -To -
Use (RTU) products
to avoid storing
large concentrated
quantities of
pesticides.

Store unused chemicals in a locked cabinet.

Unused pesticide chemicals may be disposed
of at a Household Hazardous Waste Collection
Center.

Empty pesticide containers should be triple
rinsed prior to disposing of them in the trash.

Household Hazardous Waste
Collection Center P R o, e c r
(714) 834-6752 POMAIOVI
www.oclandfills.com P� �� T N

lean beaches
and healthy
creeks, rivers, bays
and ocean are important to
Orange County. However,
many common activities
can lead to water pollution
if you're not careful.

Fertilizers, pesticides and
other chemicals that are left
on yards or driveways can
be blown or washed into
storm drains that flow to the
ocean. Overwatering lawns
can also send materials into
storm drains. Unlike water
in sanitary sewers (from sinks
and toilets), water in storm
drains is not treated before
entering our waterways.

You would never pour
gardening products into the
ocean, so don't let them enter
the storm drains. Follow
these easy tips to help prevent
water pollution.

Help Prevent Ocean Pollution:

Tips for
Landscape 8c Gardening
i ..

I
%-A-

Never allow gardening products or
polluted water to enter the street, gutter
or storm drain.

General Landscaping Tibbs
■ Protect stockpiles and materials from
wind and rain by storing them under
tarps or secured plastic sheeting.
■Prevent erosion of slopes by planting
fast-growing, dense ground covering
plants. These will shield and bind the
soil.
■Plant native vegetation
to reduce the amount
of water, fertilizers, and
pesticide applied to the
landscape.
■Never apply pesticides
or fertilizers when rain is
predicted within the next 48 hours.

Garden & Lawn Maintenance
■Do not overwater. Use irrigation
practices such as drip irrigation,
soaker hoses or micro spray systems.

Periodically inspect and fix leaks and
misdirected sprinklers.
■ Do not rake or blow
leaves, clippings or
pruning waste into
the street, gutter
or storm drain.

Instead, dispose
of green waste by
composting, hauling
it to a permitted
landfill, or recycling it through your
city's program.
■ Use slow -release fertilizers to
minimize leaching, and use organic
fertilizers.
■ Read labels and use only as directed.

Do not over -apply pesticides or
fertilizers. Apply to spots as needed,
rather than blanketing an entire
area.
■ Store pesticides, fertilizers and other
chemicals in a dry covered area to
prevent exposure that may result
in the deterioration
of containers and
packaging.
■ Rinse empty
pesticide containers
and re -use rinse water
as you would use the
product. Do not dump rinse water
down storm drains. Dispose of empty
containers in the trash.
■ When available, use non -toxic
alternatives to traditional pesticides,
and use pesticides specifically
designed to control the pest you are
targeting. For more information, visit
www.ipm.ucdavis.edu .
■ If fertilizer is spilled, sweep up the
spill before irrigating. If the spill is
liquid, apply an absorbent material
such as cat litter, and then sweep it up
and dispose of it in the trash.
■ Take unwanted pesticides to a
Household Hazardous Waste
Collection Center to be recycled.

Locations are provided below.

F-80

Preventing water
pollution at your
commercial/industrial site
Clean beaches and healthy creeks, rivers,
bays and ocean are important to Orange
County. However, many landscape and
building maintenance activities can lead to
water pollution if you're not careful. Paint,
chemicals, plant clippings and other materials
can be blown or washed into storm drains that
flow to the ocean. Unlike water in sanitary
sewers (from sinks and toilets), water in storm
drains is not treated before entering our
waterways.

You would never pour soap or fertilizers into
the ocean, so why would you let them enter the
storm drains? Follow these easy tips to help
prevent water pollution.

Some types of industrial facilities are required
to obtain coverage under the State General
Industrial Permit. For more information visit:
www.swrcb.ca.gov/stormwater/industrial.html
For more information,
please call the
Orange County Stormwater Program
at 1-877-89-SPILL (1-877-897-7455)
or visit
www.ocwatersheds.com
To report a spill,
call the
Orange County 24-Hour
Water Pollution Problem
Reporting Hotline
at 1-877-89-SPILL (1-877-897-7455) .

For emergencies, dial 911.

RECYCLE

USED OIL

P R O J E C T
PH44fiOn

P R E V E N T I O N
Printed on #egxcled Paper

Landscape Maintenance
■ Compost grass clippings, leaves, sticks
and other vegetation, or dispose of it at
a permitted landfill or in green waste
containers. Do not dispose of these
materials in the street, gutter or storm
drain.
■ Irrigate slowly and inspect the system
for leaks, overspraying and runoff.

Adjust automatic timers to avoid
overwatering.
■ Follow label directions for the use and
disposal of fertilizers and pesticides.
■ Do not apply pesticides or fertilizers if
rain is expected within 48 hours or if
wind speeds are above 5 mph.
■ Do not spray pesticides within 100 feet
of waterways.
■ Fertilizers should be worked into the
soil rather than dumped onto the
surface.
■ If fertilizer is spilled on the pavement
or sidewalk, sweep it up immediately
and place it back in the container.

Building Maintenance
■ Never allow washwater, sweepings or
sediment to enter the storm drain.
■ Sweep up dry spills and use cat litter,
towels or similar materials to absorb wet
spills. Dispose of it in the trash.
■ If you wash your building, sidewalk or
parking lot, you must contain the water.

Use a shop vac to collect the water and
contact your city or sanitation agency
for proper disposal information. Do
not let water enter the street, gutter or
storm drain.
■ Use drop cloths underneath outdoor
painting, scraping, and sandblasting
work, and properly dispose of materials
in the trash.
■ Use a ground cloth or oversized tub for
mixing paint and cleaning tools.
■ Use a damp mop or broom to clean
floors.
■ Cover dumpsters to keep insects,
animals, rainwater and sand from
entering. Keep the area around the
dumpster clear of trash and debris. Do
not overfill the dumpster.
■ Call your trash hauler to replace leaking
dumpsters.
■
Do not dump any toxic substance or
liquid waste on the pavement, the
ground, or near a
storm drain. Even
materials that
seem harmless
such as latex paint
or biodegradable
cleaners can
damage the
environment.
■ Recycle paints, solvents and other
materials. For more information about
recycling and collection centers, visit
www.ociandfills.com .
■ Store materials indoors or under cover
and away from storm drains.
■ Use a construction and demolition
recycling company to recycle lumber,
paper, cardboard, metals, masonry,
carpet, plastic, pipes, drywall, rocks,
dirt, and green waste. For a listing of
construction and demolition recycling
locations in your area, visit
www.ciwmb.ca.gov/recycle .
■ Properly label materials. Familiarize
employees with Material P R O J E G T
Safety Data Sheets. PC)Bt4fiOn
P R E V E N T 1 O N
F-82

ATTACHMENT C

ORANGE COUNTY RAINFALL ZONES MAP
F-83

WQMP
Operation &Maintenance (O&M) Plan
Prepared for:
1401 Quail Street
Newport Beach, CA 92660
F-84

Legal Project Description:

REAL PROPERTY IN THE CITY OF NEWPORT BEACH, COUNTY OF ORANGE, STATE OF CALIFORNIA, DESCRIBED AS FOLLOWS:

PARCEL 1 OF PARCEL MAP NO. 341, AS PER MAP FILED IN BOOK 44, PAGE 38

OF PARCEL MAPS, IN THE OFFICE OF THE COUNTY RECORDER OF SAID COUNTY.

EXCEPT THE FULL RIGHTS TO ALL MINERALS, PETROLEUM, GAS AND OTHER HYDROCARBON SUBSTANCES EXISTING BELOW 500 FEET FROM THE

SURFACE OF SAID REAL PROPERTY DESCRIBED ABOVE, PROVIDED,

HOWEVER, THAT GRANTOR HEREBY EXPRESSLY WAIVES THE RIGHT TO

ENTER UPON THE SURFACE OF SAID REAL PROPERTY FOR THE PURPOSE OF

EXPLORING FOR, OR PRODUCING THE MINERALS, PETROLEUM, GAS AND

OTHER HYDROCARBON SUBSTANCES SO RESERVED, AS RESERVED IN THE DEED RECORDED AUGUST 22, 1973 IN BOOK 10863, PAGE 782 OF OFFICIAL RECORDS.

APN: 427-332-04
F-85

BMP Inspection/Maintenance
Inspection/
Minimum
Responsible
BMP
Maintenance
Frequency of
Party(s)
Activities Required
Activities
Permavoid Planter
-Inspect semiannually for
Areas
Owner
beginning (October) and end of
Ongoing
the wet season (April)
Educational materials will be
provided to tenants
Education for
annually. Materials to be
Property Owners,
distributed are found in
Tenants and
Owner
Attachment F. Tenants will be
Annually
Occupants
provided these materials
by the Owner prior to
occupancy and periodically
thereafter
The Owner will prescribe
activity restrictions to protect
surface water quality, through
lease terms or other
Activity Restrictions
Owner
equally effective measure, for
Ongoing
the property.

Restrictions include, but are
not limited to, prohibiting
vehicle maintenance or
vehicle washing.

Maintenance shall be
consistent with City
requirements. Fertilizer
and/or pesticide usage shall
be consistent with County
Common Area
Management Guidelines
Landscape
Owner
for Use of Fertilizers (OC
Monthly
Management
DAMP Section 5.5) as well
as local requirements.

Maintenance includes
mowing, weeding, and debris
removal on a weekly
basis. Trimming, replanting,
and replacement of
F-86

mulch shall be performed on
an as -needed basis to
prevent exposure of erodible
surfaces. Trimmings,
clippings, and other landscape
wastes shall be
properly disposed of in
accordance with local
regulations. Materials
temporarily stockpiled during
maintenance activities shall
be placed away from
water courses and storm
drain inlets.

Litter patrol and
other litter control activities
Common Area Litter
Owner
shall be performed on a
Weekly
Control
weekly basis and in
conjunction with routine
maintenance activities.

Catch basin inlets and other
drainage facilities shall
be inspected after each storm
Common Area Catch
Owner
event and once per
Annually
Basin Inspection
year. Inlets and other
facilities shall be cleaned prior
to the rainy season, by
October 1 each year.

F-87

Storm Drain
Stencilling and
Signage
Owner
Storm drain stencils shall be
inspected for legibility, at
minimum, once prior to the
storm season, no later
than October 1 each year.

Those determined to be
illegible will be re -stencilled
as soon as possible.

Annually
In conjunction with routine
maintenance activities,
verify that landscape design
continues to function
properly by adjusting
properly to eliminate
oversprayto hardscape areas,
Use efficient
and to verify that irrigation
irrigation systems &
timing and cycle lengths are
landscape design,
adjusted in accordance
water conservation,
Owner
with water demands, given
Twice per year
smart controllers,
time of year, weather, and
and source control
day or night time
temperatures. System testing
shall occur twice per year.

Water from testing/flushing
shall be collected and
properly disposed to the
sewer system and shall not
discharge to the storm drain
system.

F-88

BMP OPERATION & MAINTENANCE LOG
Today's Date:

Name of Person Performing Activity
(Printed):

Signature:

BMP Name Brief Description of Implementation, Maintenance, and (As Shown in 0&M Plan) Inspection Activitv Performed
F-89

TRAINING / EDUCATIONAL LOG
Date of Training/Educational Activity:

Name of Person Performing Activity
(Printed):

Signature:

Topic of Training/Educational Activity:

Name of Participant Signature of Participant
For newsletter or mailer educational activities, please include the following information:
■ Date of mailing
■ Number distributed
■ Method of distribution
■ Topics addressed
If a newsletter article was distributed, please include a copy of it.

F-90

1401 QUAIL STREET RESIDENTIAL PROJECT EIR ADDENDUM

CITY OF NEWPORT BEACH
Appendices
Appendix G Noise Impact Analysis
PlaceWorks

1401 QUAIL STREET RESIDENTIAL PROJECT EIR ADDENDUM

CITY OF NEWPORT BEACH
Appendices
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Marcb 2024'��

U'#�URBAM

CROSSROADS
1401 Quail Street
Residential Apartments

NOISE IMPACT ANALYSIS

CITY OF NEWPORT BEACH
PREPARED BY:

Bill Maddux
[email protected]
(619) 778-1971
NOVEMBER 29, 2023
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1401 Quail Street Residential Apartments Noise Impact Analysis

TABLE OF CONTENTS
TABLE OF CONTENTS............................................................................................................................. I APPENDICES.........................................................................................................................................

II
LIST OF EXHIBITS..................................................................................................................................

II
LIST OF TABLES...................................................................................................................................

III
LIST OF ABBREVIATED TERMS.............................................................................................................

III
EXECUTIVE SUMMARY......................................................................................................................... 1 1 INTRODUCTION........................................................................................................................... 3

1.1 Site Location.................................................................................................................................. 3

1.2 Project Description........................................................................................................................ 3 2 FUNDAMENTALS.........................................................................................................................7

2.1 Range of Noise.............................................................................................................................. 7

2.2 Noise Descriptors..........................................................................................................................8

2.3 Sound Propagation........................................................................................................................8

2.4 Noise Control................................................................................................................................ 9

2.5 Noise Barrier Attenuation.............................................................................................................9

2.6 Land Use Compatibility With Noise.............................................................................................. 9 2.7 Community Response to Noise................................................................................................... 10 2.8 Vibration..................................................................................................................................... 11 2.8 Vibration..................................................................................................................................... 11 3 REGULATORY SETTING.............................................................................................................. 15 3.1 State of California Noise Requirements......................................................................................15

3.2 State of California Building Code................................................................................................15

3.3 City of Newport Beach General Plan Noise Element.................................................................. 15 3.4 City of Newport Beach Stationary (Non -Transportation) Noise Standards ................................ 18 3.5 Construction Vibration Standards............................................................................................... 21 3.6 Airport Land Use Compatibility................................................................................................... 22 4 SIGNIFICANCE CRITERIA............................................................................................................ 25 4.1 Significance Criteria for Construction Noise and Vibration........................................................ 25 4.2 Significance Criteria for Operation.............................................................................................. 25 4.3 Significance Criteria Summary.................................................................................................... 26 5 OFF -SITE TRANSPORTATION NOISE IMPACTS............................................................................ 27 6 RECEIVER LOCATIONS................................................................................................................ 29 7 OPERATIONAL NOISE IMPACTS................................................................................................. 31 7.1 Operational Noise Sources.......................................................................................................... 31 7.2 Reference Operational Noise Levels...........................................................................................31

7.3 CadnaA Noise Prediction Model.................................................................................................34

7.4 Project Operational Noise Levels................................................................................................34

7.5 Project Operational Noise Level Compliance.............................................................................. 35 7.6 Project Operational Noise Level Increase...................................................................................36 8 CONSTRUCTION NOISE IMPACTS............................................................................................... 37 8.1 Construction Noise Sources........................................................................................................37

8.2 Construction Reference Noise Levels......................................................................................... 39 15418-06 Noise_Study.docx
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1401 Quail Street Residential Apartments Noise Impact Analysis

8.3 Construction Noise Analysis........................................................................................................ 39

8.4 Construction Noise Level Compliance........................................................................................40

8.5 Construction Vibration Impacts..................................................................................................41 9 AIRPORT NOISE EXPOSURE........................................................................................................ 45 10 REFERENCES..............................................................................................................................47 11 CERTIFICATION..........................................................................................................................49

APPENDICES
APPENDIX 3.1: CITY OF NEWPORT BEACH MUNICIPAL CODE CHAPTER 10.26 APPENDIX 3.2: CITY OF NEWPORT BEACH MUNICIPAL CODE CHAPTER 10.28 APPENDIX 7.1: OPERATIONAL NOISE LEVEL CALCULATIONS
APPENDIX 8.1: CONSTRUCTION NOISE LEVEL CALCULATIONS

LIST OF EXHIBITS
EXHIBIT 1-A: LOCATION MAP.............................................................................................................. 4 EXHIBIT1-13: SITE PLAN........................................................................................................................ 5 EXHIBIT 2-A: TYPICAL NOISE LEVELS.................................................................................................... 7 EXHIBIT 2-13: NOISE LEVEL INCREASE PERCEPTION............................................................................. 11 EXHIBIT 2-C: TYPICAL LEVELS OF GROUND -BORNE VIBRATION.......................................................... 13 EXHIBIT 3-A: LAND USE NOISE COMPATIBILITY MATRIX.................................................................... 19 EXHIBIT 3-13: AIRPORT COMPATIBILITY NOISE LEVELS BY LAND USE .................................................... 23 EXHIBIT 3-C: JOHN WAYNE AIRPORT NOISE LEVEL CONTOUR BOUNDARIES ...................................... 24 EXHIBIT 6-A: RECEIVER LOCATIONS................................................................................................... 30 EXHIBIT 7-A: OPERATIONAL NOISE SOURCES..................................................................................... 32 EXHIBIT 8-A: CONSTRUCTION ACTIVITY AND RECEIVER LOCATIONS ................................................... 38 15418-06 Noise_Study.docx
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1401 Quail Street Residential Apartments Noise Impact Analysis

LIST OF TABLES
TABLE ES-1: SUMMARY OF CEQA SIGNIFICANCE FINDINGS.................................................................. 1 TABLE 3-1: OPERATIONAL NOISE STANDARDS................................................................................... 20 TABLE 3-2: CONSTRUCTION NOISE STANDARDS................................................................................ 21 TABLE 3-3 CONSTRUCTION VIBRATION STANDARDS.......................................................................... 21 TABLE 4-1: SIGNIFICANCE CRITERIA SUMMARY MATRIX..................................................................... 26 TABLE 7-1: REFERENCE NOISE LEVEL MEASUREMENTS...................................................................... 33 TABLE 7-2: DAYTIME PROJECT OPERATIONAL NOISE LEVELS.............................................................. 35 TABLE 7-3: NIGHTTIME PROJECT OPERATIONAL NOISE LEVELS.......................................................... 35 TABLE 7-4: OPERATIONAL NOISE LEVEL COMPLIANCE....................................................................... 36 TABLE 8-1: CONSTRUCTION REFERENCE NOISE LEVELS...................................................................... 39 TABLE 8-2: CONSTRUCTION ACTIVITY NOISE LEVEL SUMMARY.......................................................... 40 TABLE 8-3: CONSTRUCTION EQUIPMENT NOISE LEVEL COMPLIANCE ................................................. 41 TABLE 8-4: VIBRATION SOURCE LEVELS FOR CONSTRUCTION EQUIPMENT ........................................ 42 TABLE 8-5: CONSTRUCTION EQUIPMENT VIBRATION LEVELS............................................................. 43 LIST OF ABBREVIATED TERMS
(1)
Reference
ADT
Average Daily Traffic
ANSI
American National Standards Institute
Calveno
California Vehicle Noise
CEQA
California Environmental Quality Act
CNEL
Community Noise Equivalent Level
dBA
A -weighted decibels
FHWA
Federal Highway Administration
FTA
Federal Transit Administration
INCE
Institute of Noise Control Engineering
Leq
Equivalent continuous (average) sound level
Lmax
Maximum level measured over the time interval
Lmin
Minimum level measured over the time interval
mph
Miles per hour
PPV
Peak Particle Velocity
Project
1401 Quail Street Residential Apartments
REMEL
Reference Energy Mean Emission Level
RMS
Root -mean -square
VdB
Vibration Decibels
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1401 Quail Street Residential Apartments Noise Impact Analysis

EXECUTIVE SUMMARY
Urban Crossroads, Inc. has prepared this noise study to determine the potential noise impacts and the necessary noise mitigation measures, if any, for the proposed 1401 Quail Street Residential Apartments ("Project"). The Project site is a 1.71-acre site located at 1401 Quail Street in Newport Beach (APN 427-332-04). The property is at the southwest corner of Quail Street and Spruce Avenue and currently has a single -story commercial office building totaling approximately 22,536 square feet.

The Project would develop 78 multifamily residential units, including a 50 percent density bonus request, of which 62 units would be market rate and 16 units are affordable housing units.

The results of this 1401 Quail Street Residential Apartments Noise Impact Analysis are summarized below based on the significance criteria in Section 4 of this report consistent with Appendix G of the California Environmental Quality Act (CEQA) Guidelines. (1) Table ES-1 shows the findings of significance for each potential noise and/or vibration impact under CEQA. All impacts are considered less than significant without mitigation.

TABLE ES-1: SUMMARY OF CEQA SIGNIFICANCE FINDINGS
Analysis
Report
Section
Significance Findings
Unmitigated
Mitigated
Off -Site Traffic Noise
5 Less Than Significant
-
Operational Noise
7 Less Than Significant
-
Construction Noise
8 Less Than Significant
-
Construction Vibration
Less Than Significant
-
Airport Exposure
9 Less Than Significant
-
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1401 Quail Street Residential Apartments Noise Impact Analysis 1 INTRODUCTION
This noise analysis has been completed to determine the noise impacts associated with the development of the proposed 1401 Quail Street Residential Apartments ("Project"). This noise study briefly describes the proposed Project, provides information regarding noise fundamentals, describes the local regulatory setting, provides the study methods and procedures for an analysis of the potential Project -related long-term operational noise and short-term construction noise and vibration impacts.

1.1 SITE LOCATION
The Project is a 1.71-acre site located at 1401 Quail Street in Newport Beach (APN 427-332-04), as shown on Exhibit 1-A. The property is at the northwest corner of Quail Street and Spruce Avenue and currently has a single -story commercial office building totaling approximately 22,536 square feet. Surrounding land uses include miscellaneous commercial uses, including retail, office, banks, service uses, medical offices, and restaurants.

1.2 PROJECT DESCRIPTION
The Project would develop 78 multifamily residential units, including a 50 percent density bonus request, of which 62 units would be market rate and 16 units are affordable housing units. 15418 06 Noise_Study.docx ��► URBAN
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1401 Quail Street Residential Apartments Noise Impact Analysis 15418-06 Noise_Study.docx
EXHIBIT 1-A: LOCATION MAP
increment P Corp., GEBt, USGS, FAO, NPS,
Nftr-4 kLeogase, IGN, duster Nt, Ordnance
Survey, EsH.6pdn, MET! Esri China (Hong Kong),
(c) Open$tregthlap cunt butars, aAd the GIs
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1401 Quail Street Residential Apartments Noise Impact Analysis 15418-06 Noise_Study.docx
EXHIBIT 1-B: SITE PLAN
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1401 Quail Street Residential Apartments Noise Impact Analysis 2 FUNDAMENTALS
Noise is simply defined as "unwanted sound." Sound becomes unwanted when it interferes with normal activities, when it causes actual physical harm or when it has adverse effects on health.

Noise is measured on a logarithmic scale of sound pressure level known as a decibel (dB). A - weighted decibels (dBA) approximate the subjective response of the human ear to broad frequency noise source by discriminating against very low and very high frequencies of the audible spectrum. They are adjusted to reflect only those frequencies which are audible to the human ear. Exhibit 2-A presents a summary of the typical noise levels and their subjective loudness and effects that are described in more detail below.

EXHIBIT 2-A: TYPICAL NOISE LEVELS

COMMON OUTDOOR

COMMON INDOOR

A - WEIGHTED
511BJECTIVE EFFECTS OF

ACTIVITIES

ACTIVITIES
SOUND LEVEL dBA

LOUDNESS NOISE

THRESHOLD OF PAIN
14D
tERARLE
EAFENIN[i
►WA�i45 It M

NEAR JET ENGINE
130
120
JET FLY -OVER AT 3DOm (I GOO ft)

ROCK BAND
110

LOUD AUTO HORN
1OD
GAS LAWN MOWER AT 1m (3 ft)
90 VERY N415Y
DIESEL TRUCK AT 1Sm (50ft),
FOOD BLENDER AT 1m (3 ft)
110
at 90 kmlhr (50 mph)
NOISY URBAN AREA. DAYTIME
VACUUM CLEANER AT 3m (I Oft)
70 SPEECH
LOUD

INTEIRPERENCE
HEAVY TRAFFIC AT 90m (300ft)
NORMAL SPEECH AT I (3 ft)
60 QUIET URBAN DAYTIME

LARGE BUSINESS OFFICE
SO

MODERATE
SLEEP

DISTURBANCE

QUIET URBAN NIGHTTIME

THEATER, LARGE CONFERENCE
40 ROOM (BACKGROUND)

QUIET SUBURBAN NIGHTTIME

LIBRARY
30 FAINT

QUIET RURAL NIGHTTIME

BEDROOM AT NIGHT, CONCERT
20 HALL (BACKGROUND)

BROADCASTIRECORDING
TO

NO EFFECT
STUDIO

VERY FAINT

LOWEST THRESHOLD OF HUMAN

LOWEST TH RES HOLD OF HUMAN
0 HEARING

HEARING

2.1 RANGE OF NOISE
Since the range of intensities that the human ear can detect is so large, the scale frequently used to measure intensity is a scale based on multiples of 10, the logarithmic scale. The scale for measuring intensity is the decibel scale. Each interval of 10 decibels indicates a sound energy ten times greater than before, which is perceived by the human ear as being roughly twice as loud. (2) The most common sounds vary between 40 dBA (very quiet) to 100 dBA (very loud). Normal conversation at three feet is roughly at 60 dBA, while loud jet engine noises equate to 110 dBA at approximately 100 feet, which can cause serious discomfort. (3) Another important aspect of noise is the duration of the sound and the way it is described and distributed in time. 15418-06 Noise_Study.docx ► URBAN
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1401 Quail Street Residential Apartments Noise Impact Analysis

2.2 NOISE DESCRIPTORS
Environmental noise descriptors are generally based on averages, rather than instantaneous, noise levels. The most used figure is the equivalent level (Leq). Equivalent sound levels are not measured directly but are calculated from sound pressure levels typically measured in A - weighted decibels (dBA). The equivalent sound level (Leq) represents a steady state sound level containing the same total energy as a time varying signal over a given sample period and is commonly used to describe the "average" noise levels within the environment.

Peak hour or average noise levels, while useful, do not completely describe a given noise environment. Noise levels lower than peak hour may be disturbing if they occur during times when quiet is most desirable, namely evening and nighttime (sleeping) hours. To account for this, the Community Noise Equivalent Level (CNEL), representing a composite 24-hour noise level is utilized. The CNEL is the weighted average of the intensity of a sound, with corrections for time of day, and averaged over 24 hours. The time -of -day corrections require the addition of 5 decibels to dBA Leq sound levels in the evening from 7:00 p.m. to 10:00 p.m., and the addition of 10 decibels to dBA Leq sound levels at night between 10:00 p.m. and 7:00 a.m. These additions are made to account for the noise sensitive time periods during the evening and night hours when sound appears louder. CNEL does not represent the actual sound level heard at any time, but rather represents the total sound exposure. The City of Newport Beach relies on the 24-hour CNEL level to assess land use compatibility with transportation related noise sources.

2.3 SOUND PROPAGATION
When sound propagates over a distance, it changes in level and frequency content. The way noise reduces with distance depends on the following factors.

2.3.1 GEOMETRIC SPREADING
Sound from a localized source (i.e., a stationary point source) propagates uniformly outward in a spherical pattern. The sound level attenuates (or decreases) at a rate of 6 dB for each doubling of distance from a point source. Highways consist of several localized noise sources on a defined path and hence can be treated as a line source, which approximates the effect of several point sources. Noise from a line source propagates outward in a cylindrical pattern, often referred to as cylindrical spreading. Sound levels attenuate at a rate of 3 dB for each doubling of distance from a line source. (2)

2.3.2 GROUND ABSORPTION
The propagation path of noise from a highway to a receiver is usually very close to the ground.

Noise attenuation from ground absorption and reflective wave canceling adds to the attenuation associated with geometric spreading. Traditionally, the excess attenuation has also been expressed in terms of attenuation per doubling of distance. This approximation is usually sufficiently accurate for distances of less than 200 ft. For acoustically hard sites (i.e., sites with a reflective surface between the source and the receiver, such as a parking lot or body of water), no excess ground attenuation is assumed. For acoustically absorptive or soft sites (i.e., those 15418-06 Noise_Study.docx ► URBAN
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1401 Quail Street Residential Apartments Noise Impact Analysis sites with an absorptive ground surface between the source and the receiver such as soft dirt, grass, or scattered bushes and trees), an excess ground attenuation value of 1.5 dB per doubling of distance is normally assumed. When added to the cylindrical spreading, the excess ground attenuation results in an overall drop-off rate of 4.5 dB per doubling of distance from a line source. (4)

2.3.3 ATMOSPHERIC EFFECTS
Receivers located downwind from a source can be exposed to increased noise levels relative to calm conditions, whereas locations upwind can have lowered noise levels. Sound levels can be increased at large distances (e.g., more than 500 feet) due to atmospheric temperature inversion (i.e., increasing temperature with elevation). Other factors such as air temperature, humidity, and turbulence can also have significant effects. (2)

2.3.4 SHIELDING
A large object or barrier in the path between a noise source and a receiver can substantially attenuate noise levels at the receiver. The amount of attenuation provided by shielding depends on the size of the object and the frequency content of the noise source. Shielding by trees and other such vegetation typically only has an "out of sight, out of mind" effect. That is, the perception of noise impact tends to decrease when vegetation blocks the line -of -sight to nearest residents. However, for vegetation to provide a substantial, or even noticeable, noise reduction, the vegetation area must be at least 15 feet in height, 100 feet wide and dense enough to completely obstruct the line -of sight between the source and the receiver. This size of vegetation may provide up to 5 dBA of noise reduction. The FHWA does not consider the planting of vegetation to be a noise abatement measure. (4)

2.4 NOISE CONTROL
Noise control is the process of obtaining an acceptable noise environment for an observation point or receiver by controlling the noise source, transmission path, receiver, or all three. This concept is known as the source -path -receiver concept. In general, noise control measures can be applied to these three elements.

2.5 NOISE BARRIER ATTENUATION
Effective noise barriers can reduce noise levels by up to 10 to 15 dBA, cutting the loudness of traffic noise in half. A noise barrier is most effective when placed close to the noise source or receiver. Noise barriers, however, do have limitations. For a noise barrier to work, it must be high enough and long enough to block the path of the noise source. (4)

2.6 LAND USE COMPATIBILITY WITH NOISE
Some land uses are more tolerant of noise than others. For example, schools, hospitals, churches, and residences are more sensitive to noise intrusion than are commercial or industrial developments and related activities. As ambient noise levels affect the perceived amenity or 15418 06 Noise_Study.docx �1 URBAN

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1401 Quail Street Residential Apartments Noise Impact Analysis livability of a development, so too can the mismanagement of noise impacts impair the economic health and growth potential of a community by reducing the area's desirability as a place to live, shop and work. For this reason, land use compatibility with the noise environment is an important consideration in the planning and design process. The FHWA encourages State and Local government to regulate land development in such a way that noise -sensitive land uses are either prohibited from being located adjacent to a highway, or that the developments are planned, designed, and constructed in such a way that noise impacts to sensitive land uses are minimized. (5)

2.7 COMMUNITY RESPONSE TO NOISE
Community responses to noise may range from registering a complaint by telephone or letter, to initiating court action, depending upon everyone's susceptibility to noise and personal attitudes about noise. Several factors are related to the level of community annoyance including:
• Fear associated with noise producing activities;
• Socio-economic status and educational level;
• Perception that those affected are being unfairly treated; • Attitudes regarding the usefulness of the noise -producing activity; • Belief that the noise source can be controlled.

Approximately ten percent of the population has a very low tolerance for noise and will object to any noise not of their making. Consequently, even in the quietest environment, some complaints will occur. Twenty-five percent of the population will not complain even in very severe noise environments. Thus, a variety of reactions can be expected from people exposed to any given noise environment. (6) Surveys have shown that about ten percent of the people exposed to traffic noise of 60 dBA will report being highly annoyed with the noise, and each increase of one dBA is associated with approximately two percent more people being highly annoyed. When traffic noise exceeds 60 dBA or aircraft noise exceeds 55 dBA, people may begin to complain. (6) Despite this variability in behavior on an individual level, the population can be expected to exhibit the following responses to changes in noise levels as shown on Exhibit 2-13. A change of 3 dBA are considered barely perceptible, and changes of 5 dBA are considered readily perceptible. (4)
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1401 Quail Street Residential Apartments Noise Impact Analysis EXHIBIT 2-13: NOISE LEVEL INCREASE PERCEPTION
Twice as Loud
Readily Perceptible
Barely Perceptible
Just Perceptible
0 1 2 3 4 5 6 7 8 9 10
Noise Level Increase (dBA)

2.8 VIBRATION

2.8 VIBRATION
Per the Federal Transit Administration (FTA) Transit Noise and Vibration Impact Assessment Manual, vibration is the periodic oscillation of a medium or object. The rumbling sound caused by the vibration of room surfaces is called structure -borne noise. Sources of ground -borne vibrations include natural phenomena (e.g., earthquakes, volcanic eruptions, sea waves, landslides) or human -made causes (e.g., explosions, machinery, traffic, trains, construction equipment). Vibration sources may be continuous, such as factory machinery, or transient, such as explosions. As is the case with airborne sound, ground -borne vibrations may be described by amplitude and frequency.

Additionally, in contrast to airborne noise, ground -borne vibration outdoors is not a common environmental problem and annoyance from ground -borne vibration is almost exclusively an indoor phenomenon (7). Therefore, the effects of vibrations should only be evaluated at a structure and the effects of the building structure on the vibration should be considered. Wood - frame buildings, such as typical residential structures, are more easily excited by ground vibration than heavier buildings. In contrast, large masonry buildings with spread footings have a low response to ground vibration (7). In general, the heavier a building is, the lower the response will be to the incident vibration energy. However, all structurers reduce vibration levels due to the coupling of the building to the soil.

There are several different methods that are used to quantify vibration. The peak particle velocity (PPV) is defined as the maximum instantaneous peak of the vibration signal (7). The PPV is most frequently used to describe vibration impacts to buildings but is not always suitable for evaluating human response (annoyance) because it takes some time for the human body to respond to vibration signals. Instead, the human body responds to average vibration amplitude often described as the root mean square (RMS). The RMS amplitude is defined as the average of the squared amplitude of the signal and is most frequently used to describe the effect of vibration on the human body (7). However, the RMS amplitude and PPV are related mathematically, and the RMS amplitude of equipment is typically calculated from the PPV reference level. The RMS amplitude is approximately 70% of the PPV (8). Thus, either can be used on the description of vibration impacts.
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1401 Quail Street Residential Apartments Noise Impact Analysis While not universally accepted, vibration decibel notation (VdB) is another vibration notation developed and used by the FTA in their guidance manual to describe vibration levels and provide a background of common vibration levels and set vibration limits (9). Decibel notation (VdB) serves to reduce the range of numbers used to describe vibration levels and is used in this report to describe vibration levels.

As stated in the FTA guidance manual, the background vibration -velocity level in residential areas is generally 50 VdB. Ground -borne vibration is normally perceptible to humans at approximately 65 VdB. For most people, a vibration -velocity level of 75 VdB is the approximate dividing line between barely perceptible and distinctly perceptible levels. Typical outdoor sources of perceptible ground -borne vibration are construction equipment, steel -wheeled trains, and traffic on rough roads. If a roadway is smooth, the ground -borne vibration is rarely perceptible. The range of interest is from approximately 50 VdB, which is the typical background vibration -velocity level, to 100 VdB, which is the general threshold where minor damage can occur in fragile buildings. Exhibit 2-C illustrates common vibration sources and the human and structural response to ground -borne vibration.
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1401 Quail Street Residential Apartments Noise Impact Analysis EXHIBIT 2-C: TYPICAL LEVELS OF GROUND -BORNE VIBRATION
Velocity Typical Sources
Human/Structural Response Level" (50 ft from source)
Threshold, mirror cosmetic damage
fragile buildings
Difficulty with tasks such as
reading a VDT screen
Residential annoyance, infrequent
events (e.g. commuter rail)
Blasting from construction pro3ects
Bulldozers and other heavy tracked
90 I+ construction equipment
--- Commuter rail. upper range
801 '* Rapid transit, upper range
#— Commuter rail, typical
Residential annoyance, frequent — — Bus or truck over bump events (e.g. rapid transit)
70 Rapid transit, typical
Limit for vibration sensitive
equipment. Approx. threshold for
human perception of vibration
60 361
— Bus or truck, typical
Typical background vibration
' RMS Vibration Velocity Level in VdB restive fa 10-6 incheslsecond Source: Federal Transit Administration (FTA) Transit Noise and Vibration Impact Assessment Manual. 15418 06 Noise_Study.docx �"► URBAN

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1401 Quail Street Residential Apartments Noise Impact Analysis 3 REGULATORY SETTING
To limit population exposure to physically and/or psychologically damaging as well as intrusive noise levels, the federal government, the State of California, various City governments, and most municipalities in the state have established standards and ordinances to control noise. In most areas, automobile and truck traffic is the major source of environmental noise. Traffic activity generally produces an average sound level that remains constant with time. Air and rail traffic, and commercial and industrial activities are also major sources of noise in some areas. Federal, state, and local agencies regulate different aspects of environmental noise. Federal and state agencies generally set noise standards for mobile sources such as aircraft and motor vehicles, while regulation of stationary sources is generally left to by local agencies.

3.1 STATE OF CALIFORNIA NOISE REQUIREMENTS
The State of California regulates freeway noise, sets standards for sound transmission, provides occupational noise control criteria, identifies noise standards, and provides guidance for local land use compatibility. State law requires that each County and City adopt a General Plan that includes a Noise Element which is to be prepared per guidelines adopted by the Governor's Office of Planning and Research (OPR). (10) The purpose of the Noise Element is to limit the exposure of the community to excessive noise levels. In addition, the California Environmental Quality Act (CEQA) requires that all known environmental effects of a project be analyzed, including environmental noise impacts.

3.2 STATE OF CALIFORNIA BUILDING CODE
The State of California's noise insulation standards are codified in the California Code of Regulations, Title 24, Building Standards Administrative Code, Part 2, and the California Building Code. These noise standards are applied to new construction in California for the purpose of controlling interior noise levels resulting from exterior noise sources. The regulations specify that acoustical studies must be prepared when noise -sensitive structures, such as residential buildings, schools, or hospitals, are developed near major transportation noise sources, and where such noise sources create an exterior noise level of 60 dBA CNEL or higher. Acoustical studies that accompany building plans for noise -sensitive land uses must demonstrate that the structure has been designed to limit interior noise in habitable rooms to acceptable noise levels.

For new residential buildings, schools, and hospitals, the acceptable interior noise limit for new construction is 45 dBA CNEL. The Project is required to comply with this standard by State law and the City verifies compliance during the plan check process as ministerial process.

3.3 CITY OF NEWPORT BEACH GENERAL PLAN NOISE ELEMENT
The City of Newport Beach has adopted a Noise Element of the General Plan to control noise in the planning process in order to maintain compatible land use with environmental noise levels and to ensure that Newport Beach residents will be protected from excessive noise intrusion. (11)
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1401 Quail Street Residential Apartments Noise Impact Analysis

3.3.1 NOSE POLICIES
To protect City of Newport Beach residents from excessive noise, the Noise Element contains the following policies related to the Project.

Noise and Land Use Compatibility
N 1.1 Noise Compatibility of New Development: Require that all proposed projects are compatible with the noise environment through use of Table N2 and enforce the interior and exterior noise standards shown in Table N3.

N 1.2 Noise Exposure Verification for New Development: Applicants for proposed residential or mixed -use projects located in areas projected to be exposed to 65-70 CNEL, as shown on Figure N5 must conduct a noise study to provide evidence that the depicted noise contours do not adequately account for local noise exposure circumstances due to such factors as, topography, variation in traffic speeds, and other applicable conditions. These findings shall be used to determine the level of exterior or interior noise attenuation needed to attain an acceptable noise exposure level and the feasibility of such measures when other planning considerations are taken into account, consistect with Title 21 of the California Code of Regulations. (Imp 2.1)
N 1.4 New Developments in Urban Areas: Require that applicants of residential portions of mixed -use projects and high density residential developments in urban areas (such as the Airport Area and Newport Center) demonstrate that the design of the structure will adequately isolate noise between adjacent uses and units (common floor/ceilings) in accordance with the California Building Code. (Imp 7.1) N 1.5 Infill Projects: Allow a higher (above 65 CNEL) exterior noise level standard for infill projects in existing residential areas adjacent to major arterials if it can be shown that there are no feasible mechanisms to meet the exterior noise levels. The interior standard of 45 dBA CNEL shall be enforced for any new residential project or mixed -use project containing a residential component consistent with Title 21 of the California Code of Regulations. (Imp 2.1, 7.1)
N1.5A Airport Area Infill Projects:

Allow infill residential projects proximate to John Wayne Airport to have a higher exterior noise level standard (65-70 dBA CNEL) if it can be shown that there are no practical mechanisms or designs to meet the exterior noise levels. The interior standard of 45 dBA CNEL shall be enforced for any residential component of projects. No residential units may be located on parcels wholly within the John Wayne Airport 65 dBA CNEL noise contour area as shown in Figure N5, of the Noise Element of the General Plan, unless and until the City determines, based on substantial evidence, that the sites wholly within such contour area are needed for the City to satisfy its Sixth Cycle RHNA mandate. Nonresidential uses are encouraged on parcels located wholly within the 65 dBA CNEL contour area, shown in
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1401 Quail Street Residential Apartments Noise Impact Analysis Figure N5.

N 1.8 Significant Noise Impacts: Require the employment of noise mitigation measures for existing sensitive uses when a significant noise impact is identified. A significant noise impact occurs when there is an increase in the ambient CNEL produced by new development impacting existing sensitive uses. The CNEL increase is shown in the table below.

CNEL (dBA)
dBA increase
55 3
60 2
65 1
70 1
Over 75
Any increase is considered significant
Transportation -Related Noise
N 2.1 New Development: Require that proposed noise -sensitive uses in areas of 60 dBA and greater, as determined the analyses stipulated by Policy N1.1, demonstrate that they meet interior and exterior noise levels.

N 2.2 Design of Sensitive Land Uses: Require the use of walls, berms, interior noise insulation, double -paned windows, advanced insulation systems, or other noise mitigation measures, as appropriate, in the design of new residential developments to attenuate noise levels to not exceed 45 dBA CNEL interior. Other new noise sensitive land uses that are adjacent to major roads arterials and located proximate to John Wayne Airport (e.g., infill residential) and within the 65-70 dBA CNEL noise contour area are required to be indoor - oriented to reduce noise impacts on outdoor living or recreational areas. Application of the Noise Standards in Table N2 shall govern this requirement. (Imp 7.1) Aircraft Noise
N 3.1 New Development: Ensure new development is compatible with the noise environment proximate to John Wayne Airport by not allowing residential units on parcels located wholly within the John Wayne Airport 65 dBA CNEL noise contour, as shown in Figure N5 of the Noise Element of the General Plan, unless and until the City determines, based on substantial evidence, that the sites wholly within such contour area are needed for the City to satisfy its Sixth Cycle RHNA mandate.

N 3.2 Residential Development: Require that residential development proximate to the John Wayne Airport shall not be located on parcels wholly within the John Wayne Airport 65 dBA CNEL noise contour shown in Figure N5 of the Noise Element of the General Plan, unless and until the City determines, based on substantial evidence, that the sites wholly within such contour area are needed for the City to satisfy its Sixth Cycle RHNA mandate..

Require developers of residential or mixed -use land uses with a residential component to notify prospective purchasers or tenants of aircraft noise. Additionally, require outdoor common areas or recreational areas of residential or mixed -used developments to be posted with signs notifying users regarding the proximity to John Wayne Airport and the presence of operating aircraft and noise. (Imp 2.1, 3.1, 4.1) Nontransportation-Related Noise
N 4.1 Stationary Noise Sources: Enforce interior and exterior noise standards outlined in Table N3, and in the City's Municipal Code to ensure that sensitive noise receptors are not 15418 06 Noise_Study.docx �"► URBAN
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1401 Quail Street Residential Apartments Noise Impact Analysis exposed to excessive noise levels from stationary noise sources, such as heating, ventilation, and air conditioning equipment.

N 4.6 Maintenance or Construction Activities: Enforce the Noise Ordinance noise limits and limits on hours of maintenance or construction activity in or adjacent to residential areas, including noise that results from in -home hobby or work -related activities.

Construction Noise
N 5.1 Limiting Hours of Activity: Enforce the limits on hours of construction activity.

3.3.2 LAND USE COMPATIBILITY
The noise criteria identified in the City of Newport Beach Noise Element (Table N2) are guidelines to evaluate the land use compatibility of transportation related noise. The compatibility criteria, shown on Exhibit 3-A, provides the City with a planning tool to gauge the compatibility of land uses relative to existing and future exterior noise levels and prevent noise/land use conflicts. The Land Use Noise Compatibility Matrix in the City of Newport Beach General Plan provides guidelines to evaluate the acceptability of transportation -related noise level impacts.

3.4 CITY OF NEWPORT BEACH STATIONARY NON -TRANSPORTATION) NOISE STANDARDS In addition to the noise/land use compatibility guidelines contained in the General Plan Noise Element, the City of Newport Beach has adopted Community Noise Control policies and standards as part of its Municipal Code to limit unnecessary, excessive and annoying noise in the City. To analyze noise impacts originating from a designated fixed location or private property such as the 1401 Quail Street Residential Apartments Project, stationary -source noise such as the expected roof -top mechanical, outdoor activity, pool activity, and parking lot activity and noise from construction activities are typically evaluated against standards established under the City's Municipal Code.

The Project's residential uses are considered normally compatible with exterior noise levels below 65 dBA CNEL. For normally compatible uses, new construction or development should be undertaken only after detailed analysis of the noise reduction requirements are made and needed noise insulation feature in the design are determined. Conventional construction, with closed windows and fresh air supply systems or air conditioning, will normally suffice.

In addition, the City of Newport Beach Noise Element indicates that while California requires that interior noise levels in multi -family residential uses not exceed 45 LDN (day -night noise level); it is commonly used as an interior standard for all residential uses, but is not required under the California Administrative Code, Title 24, and Part 2. This is consistent the City of Newport Beach Noise Element Policy N 1.5 that requires an interior noise standard of 45 dBA CNEL. 15418 06 Noise_Study.docx �I ► URBAN
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1401 Quail Street Residential Apartments Noise Impact Analysis EXHIBIT 3-A: LAND USE NOISE COMPATIBILITY MATRIX
Land Use Categories I Communitv Noise Equivalent Level
V N tiI CID
Ln �o 'n n r,
Categories I Uses
Residential Single Family, Two Family, Multiple Family A A I B C C D D Residential MixedUse A A � ,A C" � C C ❑
_.._
Residential Mobile Home A A B C C D ❑
Commercial ;Hotel, Motel, Transient Lodging A A B B C C D Regional, district
------._.--------------------._.--------------
Commercial
Regional, Village Commercial Retail, Bank, Restaurant, Movie Theatre A A A A B B C District, Special
Commercial Industrial Office Building, Research and Development. A A A B B C D Institutional Professional Offices, City Office Building Commercial �
Recreational Amphitheatre, Concert Hall Auditorium Meeting Hall C I C D D I D Institutional
Civic Center
Commercial Children's Amusement Park, Miniature Golf Course, A A- A B B D D Recreation Go-cart Track, Equestrian Center, Sports Club Commercial I -----------
Automobile Service Station, Auto Dealership,
General, Special A A A A B B B
Industrial, Institutional Manufacturing, Warehousing, Wholesale, Utilities Institutional Hospital, Church, Library, SchoolsClassroom A A B C C D ❑ Open Space Parks A A A B C D D
Golf Course Cemeteries, Nature Centers Wildlife
Open Space A A A A B C C
Reserves Wildlife Habitat
Agriculture Agriculture A A A A A A A
SOURCE: Newport Beach, 2006
Zone A: Clearly Compatible —Specified land use is satisfactory, based upon the assumption that any buildings involved are of normal conventional construction without any special noise insulation requirements.

Zone B: Normally Compatible--i construction or development should be undertaken only after detailed analysis of the noise reduction requirements and are made and needed noise insulation features in the design are determined. Conventional construction, with closed windows and fresh air supply systems or air conditioning, will normally suffice.

Zone G: Normally Incompatble-New construction or development should generally be discouraged. If new construction or development does proceed, a detailed analysis of noise reduction requirements must be made and needed noise insulation features included in the design.

Zone D: Clearly Incompatible -New construction or development should generally not be undertaken. 15418-06 Noise Study.docx URBAN
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1401 Quail Street Residential Apartments Noise Impact Analysis

3.4.1 OPERATIONAL NOISE STANDARDS
The City of Newport Beach Municipal Code, Chapter 10.26 Community Noise Control, establishes the permissible exterior noise levels that may intrude into a neighboring property. According to Section 10.26.025(A) exterior noise levels at single-, two or multiple -family residential land uses (Noise Zone 1) shall not exceed 55 dBA Leq during the daytime hours (7:00 a.m. to 10:00 p.m.) and 50 dBA Leq during the nighttime hours (10:00 p.m. to 7:00 a.m.). (12) For commercial uses, exterior noise levels shall not exceed 65 dBA Leq during the daytime hours (7:00 a.m. to 10:00 p.m.) and 60 dBA Leq during the nighttime hours (10:00 p.m. to 7:00 a.m.).

According to Section 10.26.025(C), in the event the ambient noise level exceeds the noise standard, the maximum allowable noise level under said category shall be increased to reflect the maximum ambient noise level. While the Section 10.26.025(C) of City of Newport Beach Municipal Code permits the use of the existing ambient noise level to describe the base exterior noise level standards, this analysis relies on the more conservative and restrictive standards in Section 10.26.025(A). The City of Newport Beach Municipal Code, Chapter10.26 Community Noise Control exterior noise level standards are shown on Table 3-1 and are included in Appendix

3.1. TABLE 3-1: OPERATIONAL NOISE STANDARDS
Land
me
Base Exterior Noise
City
Level Standards
Use
Pelriod
(dBA Leq)z
Residential
Daytime
55 Nighttime
50 Newport
(Noise Zone 1)
Commercial
Daytime
65 Beach'
Nighttime
60 (Noise Zone II)
' Source: City of Newport Beach Municipal Code, Section 10.26.025 (Appendix 3.1).

Z Base exterior noise level standards. If the ambient level exceeds allowable exterior Leq noise level, the ambient shall be the standard per Section 10.26.025 (C) of the City of Newport Beach Municipal Code. "Daytime" = 7:00 a.m. to 10:00 p.m.; "Nighttime" = 10:00 p.m. to 7:00 a.m.

3.4.2 CONSTRUCTION NOISE STANDARDS
The City of Newport Beach has set restrictions to control noise impacts associated with the construction of the proposed Project. According to the City of Newport Beach Municipal Code Section 10.28.040 (included in Appendix 3.2), construction activities are considered exempt from the noise standards of the noise ordinance if limited to the hours of 7:00 a.m. to 6:30 p.m. on Mondays to Fridays, and 8:00 a.m. to 6:00 p.m. on Saturdays, with no activity allowed on Sundays or national holidays. (13) Section 10.28.040 allowed hours are summarized in Table 3-2. 15418 06 Noise_Study.docx III,
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1401 Quail Street Residential Apartments Noise Impact Analysis TABLE 3-2: CONSTRUCTION NOISE STANDARDS
City
Permitted Hours of
Construction Activity
7:00 a.m. to 6:30 p.m. Mondays to Fridays;
Newport Beach'
8:00 a.m. to 6:00 p.m. on Saturdays;
no activity on Sundays or national holidays
' Source: City of Newport Beach Municipal Code, Section 10.28.040 (Appendix 3.1).

Neither the City of Newport Beach General Plan Noise Element or Municipal Code establish numeric maximum acceptable construction source noise levels at potentially affected receivers.

Therefore, a numerical comparison is provided herein based on the Federal Transit Administration (FTA) Transit Noise and Vibration Impact Assessment Manual, which considers a daytime exterior construction noise level of 80 dBA Leq as reasonable for noise sensitive residential land use. (14 p. 179)

3.5 CONSTRUCTION VIBRATION STANDARDS
Construction activity can result in varying degrees of ground -borne vibration, depending on the equipment and methods used, distance to the affected structures and soil type. (14) Construction vibration is generally associated with pile driving and rock blasting. Other construction equipment such as air compressors, light trucks, hydraulic loaders, etc., generates little or no ground vibration. (14) Occasionally large bulldozers and loaded trucks can cause perceptible vibration levels at close proximity.

The City of Newport Beach has not identified or adopted vibration standards. However, the 2006 General Plan Environmental Impact Report (EIR) (15) identified a limit of 72 VdB for frequent events (more than 70 vibrations events per day) at residential uses and buildings where people normally sleep. (14) For infrequent events with fewer than 70 vibration events per day, the vibration limit is 80 VdB. These limits were derived from the FTA guidelines (14) for determining the relative significance of potential Project vibration impacts due to on -site construction activities as shown on Table 3-3.

TABLE 3-3 CONSTRUCTION VIBRATION STANDARDS
Vibration Criteria
Vibration Decibels (VdB)
at 25 feet'
2006 GP EIR - Human Annoyance (Residential)'
72 FTA - Human Annoyance (Residential Daytime)Z
78 FTA - Human Annoyance (Residential Nighttime)Z
72 FTA - Human Annoyance (Office)Z
84 'City of Newport Beach General Plan EIR
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1401 Quail Street Residential Apartments Noise Impact Analysis It should be noted that the General Plan EIR conservatively identified a residential -nighttime threshold of 72 VdB for all circumstances of vibrational energy; including for construction activities which would almost never be expected to occur during the nighttime period (10pm to 7am). The FTA has established vibration criteria of 72 VbB for Residential -Nighttime land use, when no construction activities would be allowed per City of Newport Beach Code Section

10.28.040. The FTA criteria for Residential -Daytime land use is 78 VdB, which would be more applicable to the daytime construction activities. Based on the FTA interpretation for Residential - Daytime use, at 78 VdB Vibration is barely felt.

3.6 AIRPORT LAND USE COMPATIBILITY
John Wayne Airport (JWA) is located approximately 0.3 miles north/northwest of the Project site.

The AELUP (16) prepared by the Orange County Airport Land Use Commission (ALUC), identifies noise compatibility policies to safeguard the general welfare of the inhabitants within the vicinity of the airport and to ensure the continued operation of the airport. Specifically, the AELUP plan seeks to protect the public from the adverse effects of aircraft noise, to ensure that people and facilities are not concentrated in areas susceptible to aircraft accidents, and to ensure that no structures or activities adversely affect navigable airspace.

The basic function of the AELUP is to promote compatibility between the airport and the land uses that surround it. As required by State law, the AELUP provides guidance to affected local jurisdictions regarding airport land use compatibility. The main objective of the AELUP is to avoid future compatibility conflicts rather than to remedy existing incompatibilities. Also, the AELUP is aimed at addressing future land uses and development, not airport activity. The AELUP does not place any restrictions on the present and future role, configuration, or use of the airport. The AELUP establishes aircraft noise exposure exterior noise level compatibility thresholds for new developments by land use category. According to the exterior noise thresholds outlined in Exhibit 3-13, residential development is considered normally consistent with exterior noise levels of less than 60 dBA CNEL, conditionally consistent with exterior noise levels between 60 and 65 dBA CNEL and normally inconsistent with exterior noise level above 65 dBA CNEL. The ALEUP does not require any additional considerations for exterior locations exposed to noise levels below 70 dBA CNEL. As shown on Exhibit 3-C, based on Annual CNEL Noise Contours contained in the City of Newport Beach General Plan, the Project Site is located between the 65 dBA CNEL and 60 dBA CNEL aircraft noise level contours. (17) Thus a portion of the site considered noise impact Zone

2. According to the AELUP, "[n]oise impact in this area is sufficient to require sound attenuation as set forth in the California Noise Insulation Standards, Title 25, California Code of Regulations.

Single noise events in this area create serious disturbances to many inhabitants. Even though the Commission would not find residential units incompatible in this area, the Commission strongly recommends that residential units be limited or excluded from this area unless sufficiently sound attenuated. The residential use interior sound attenuation requirement shall be a CNEL value not exceeding an interior level of 45 dB. In addition, it is recommended that designated outdoor common or recreational areas within Noise Impact Zone 2 provide outdoor signage informing the public of the presence of operating aircraft." 15418 06 Noise_Study.docx �1 URBAN
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1401 Quail Street Residential Apartments Noise Impact Analysis Based on the location of the Project within the JWA notification area. The AELUP recommends all future residents be notified of potential aircraft overflight consistent with the following:

The property is presently located in the vicinity of an airport, within what is known as an airport influence area. For that reason, the property may be subject to some of the annoyances or inconveniences associated with proximity to airport operations (for example: noise, vibration or odors). Individual sensitives to those annoyances, if any are associated with the property before you complete your purchase and determine where they are acceptable to you." EXHIBIT 3-13: AIRPORT COMPATIBILITY NOISE LEVELS BY LAND USE

AIRPORT LAND USE COMMISSION FOR ORANGE COUNTY

AIRPORT ENVIRONS LAND USE PLAN

LIMITATIONS ON LAND USE DUE TO NOISE
(Applicable to Aircraft Noise Sources)
COMMUNITY NOISE EQUIVALENT LEVEL dB
55 60 65 70 75 80

LAND USE CATEGORY
Residential (all types):

Single and Multi -Family Residences
Community Facilities:

Churches. Libraries. Schools.

Preschools. Day -Care Centers.

Hospitals. Nursing/Convalescent
Homes. & Other noise sensitive uses
Commercial:

Retail. Office
Industrial:

NORMALLY CONSISTENT
Conventional construction methods used. No special noise reduction requirements.

CONDITIONALLY CONSISTENT
Must use sound attenuation as required by the California Noise Insulation Standards, Title 25. California Code of Regulations. Residential use sound attenuation required to ensure that the interior CNEL does not exceed 45 dB_ Commercial and industrial structures shall be sound attenuated to meet Noise Impact Zone "I " criteria (refer to Section 3.2.3).

NORMALLY INCONSISTENT
All residential units are Inconsistent unless are sound attenuated to ensure that the interior CNEL does not exceed 45 dB, and that all units are indoor oriented so as to preclude noise impingement on outdoor living areas.
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1401 Quail Street Residential Apartments Noise Impact Analysis EXHIBIT 3-C: JOHN WAYNE AIRPORT NOISE LEVEL CONTOUR BOUNDARIES Radisson 7 r
fr Kbtel
r, stapkas r Pairmonl
roriryrh a Hotel
Cc� ' /
/ o
� r
' oy�d'
/ nit f� D
IF
gio 40' / Q� I Airport Area
�'
' I
53 ff �ort Ptac� Ot
h / 3d
n 3
00 Site
/ S
d
F
F��r' r�rrhq� / `s P, 73Lexue � I+bwport o a
'� `0 // •T� S,P, oho
Santa Ana
Heights`/
c` /
�' /I 3
a
� _ Ey a�� gTyvlew Cn
Er � Pbwport Beach
`rik �yaA Nlarro dt Bayvew.

K k lc he r Jo ne za
v V hk-rc Odes Benz y
c a
Sources: Es ' R Gormfn, later
increment P I BCO, USGS, FAj, NPS,
>?ayv49w F.,rk Upper v
i Back Bay NRCAN, GeoR I , Kvdosrer Nt, trdnance
c Survey, Esri lapak. MET], Esri China (Hong Kong),
(c) OpenStreetMo contributors, and the GIS
LEGEND:

L-� Project Site 60 dBA CNEL - 1 65 dBA CNEL - 1 70 dBA CNEL 15418-06 Noise_Study.docx ��► URBAN

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1401 Quail Street Residential Apartments Noise Impact Analysis 4 SIGNIFICANCE CRITERIA
The following significance criteria are based on currently adopted guidance provided by Appendix G of the California Environmental Quality Act (CEQA) Guidelines. (1) For the purposes of this report, impacts would be potentially significant if the Project results in or causes:

A. Generation of a substantial temporary or permanent increase in ambient noise levels in the vicinity of the project in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies?
B. Generation of excessive ground -borne vibration or ground -borne noise levels? C. 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? While the City of Newport Beach General Plan Guidelines provide direction on noise compatibility and establish noise standards by land use type that are sufficient to assess the significance of noise impacts, they do not define the levels at which increases are considered substantial for use under Guideline A. CEQA Appendix G Guideline C applies to nearest public and private airports, if any, and the Project's land use compatibility.

4.1 SIGNIFICANCE CRITERIA FOR CONSTRUCTION NOISE AND VIBRATION The Project's construction noise and vibration impacts are significant if:
• If Project -related construction activities that generate noise are not in compliance with the City of Newport Beach Municipal Code, Section 10.28.040.
• If short-term Project generated construction vibration levels exceed the FTA's vibration threshold of 78 VdB at residential daytime use. (14)

4.2 SIGNIFICANCE CRITERIA FOR OPERATION
The Project's operational noise impacts are significant if:
• If Project -related operational (stationary -source) noise levels exceed the exterior 55 dBA Leq daytime or 50 dBA Leq nighttime noise level standards at nearby noise sensitive residential receiver locations (City of Newport Beach Municipal Code, Section 10.26.025). • If Project -related operational (stationary -source) noise levels exceed the exterior 65 dBA Leq daytime or 60 dBA Leq nighttime noise level standards at nearby commercial receiver locations (City of Newport Beach Development Code, Section 10.26.025). • If the existing ambient noise levels at the noise -sensitive receivers near the Project site:
o are less than 55 dBA CNEL and the Project creates a barely perceptible 3 dBA CNEL or greater Project -related noise level increase; or
o range from 55 to 60 dBA CNEL and the Project creates a 2 dBA CNEL or greater Project - related noise level increase; or
o range from 60 to 75 dBA CNEL and the Project creates a 1 dBA CNEL or greater Project - related noise level increase; or
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1401 Quail Street Residential Apartments Noise Impact Analysis o already exceed 75 dBA CNEL, and the Project create any noise level increase.

4.3 SIGNIFICANCE CRITERIA SUMMARY
Noise impacts shall be considered significant if any of the following occur as a direct result of the proposed development. Table 4-1 shows the significance criteria summary matrix.

TABLE 4-1: SIGNIFICANCE CRITERIA SUMMARY MATRIX
Analysis
ReceivingSignificance
Land Use
Conditions)
Criteria
Daytime
Nighttime
On -Site
Traffic Noise'
Residential
Interior Noise Level Standard
45 dBA CNEL
Residential'
Exterior Noise Level Standards
55 dBA Leq
50 dBA Leq
Commercial'
Exterior Noise Level Standards
65 dBA Leq
60 dBA Leq
Operational
Noise
Noise-
Sensitive'
If ambient is _ 3 dBA CNEL Project Increase
If ambient is 55 - 60 dBA CNEL
>_ 2 dBA CNEL Project Increase
If ambient is 60 - 75 dBA CNEL
>_ 1 dBA CNEL Project Increase
If ambient is > 75 dBA CNEL
Any Project Increase
All
Noise Level Threshold
Compliance with Municipal Code
Section 10.28.040
Construction
Residential4
Vibration Level Threshold
78 n/a
Commercial4
84 Airport Noise
Exposure
p
All 5
Exterior Noise Level Standards
Exhibit 3-B
Interior Noise Level Standards
City of Newport Beach General Plan Noise Element Policy N 1.5. z City of Newport Beach Municipal Code, Section 10.26.025 (Appendix 3.1). 3 City of Newport Beach General Plan Policy N 1.8
" Federal Transit Administration Transit Noise and Vibration Impact Assessment Manual. 5 Orange County Land Use Plan For John Wayne Airport.
"Daytime" = 7:00 a.m. to 10:00 p.m.; "Nighttime" = 10:00 p.m. to 7:00 a.m.; "n/a" = No nighttime construction activity is permitted, so no nighttime construction noise level limits are identified; "VdB" = Vibration Decibels
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1401 Quail Street Residential Apartments Noise Impact Analysis 5 OFF -SITE TRANSPORTATION NOISE IMPACTS
The Project would result in a small increase in regional and local traffic volumes. The expected Project is anticipated to generate a net increase of 110 average daily trips which would represent an incremental increase to the existing roadway volumes and is not expected to double traffic or generate a perceptible noise level increase (i.e., less than 3 dBA CNEL) at nearby sensitive land uses adjacent to study area roadways. Due to the low traffic volumes generated by the Project, the off -site traffic noise levels generated by the Project are considered less than significant and no further analysis is required.
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1401 Quail Street Residential Apartments Noise Impact Analysis 6 RECEIVER LOCATIONS
To assess the potential for long-term operational and short-term construction noise impacts, the following sensitive receiver locations, as shown on Exhibit 6-A, were identified as representative locations for analysis. Sensitive receivers are generally defined as locations where people reside or where the presence of unwanted sound could otherwise adversely affect the use of the land.

Noise -sensitive land uses are generally considered to include schools, hospitals, single-family dwellings, mobile home parks, churches, libraries, and recreation areas. Moderately noise - sensitive land uses typically include multi -family dwellings, hotels, motels, dormitories, out- patient clinics, cemeteries, golf courses, country clubs, athletic/tennis clubs, and equestrian clubs. Land uses that are considered relatively insensitive to noise include business, commercial, and professional developments. Land uses that are typically not affected by noise include:
industrial, manufacturing, utilities, agriculture, undeveloped land, parking lots, warehousing, liquid and solid waste facilities, salvage yards, and transit terminals.

To describe the potential off -site Project noise levels, four receiver locations in the vicinity of the Project site were identified. All distances are measured from the Project site boundary to the outdoor living areas (e.g., private backyards) or at the building fagade, whichever is closer to the Project site. The selection of receiver locations is based on FHWA guidelines and is consistent with additional guidance provided by Caltrans and the FTA, as previously described in Section 5.2.

Other sensitive land uses in the Project study area that are located at greater distances than those identified in this noise study will experience lower noise levels than those presented in this report due to the additional attenuation from distance and the shielding of intervening structures. Distance is measured in a straight line from the Project boundary to each receiver location.

R1: Location R1 represents existing office use at 1400 Quail Street, approximately 99 feet northwest of the Project site. Receiver R1 is placed at the building fagade facing the Project site.

R2: Location R2 represents existing office use at 1400 Bristol Street North, approximately 59 feet southwest of the Project site. Receiver R2 is placed at the building fagade facing the Project site.

RI Location R3 represents a noise sensitive residence at 20051 Orchid Street, approximately 968 feet southwest of the Project site. Receiver R3 is placed at the use area (back yard) facing the Project site.

R4: Location R4 represents existing office use at 1451 Bristol Street North, approximately 49 feet northwest of the Project site. Receiver R4 is placed at the building fagade facing the Project site.
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1401 Quail Street Residential Apartments Noise Impact Analysis EXHIBIT 6-A: RECEIVER LOCATIONS
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I-! Site Boundary Receiver Locations —+ Distance from receiver to Project site boundary din feet) 15418 06 Noise_Study.docx ��► URBAN
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1401 Quail Street Residential Apartments Noise Impact Analysis 7 OPERATIONAL NOISE IMPACTS
The proposed residential development is considered a noise -sensitive receiving land use and is not expected to include any specific type of operational noise levels beyond the typical noise sources associated with residential land use in the Project study area. However, this section analyzes the potential stationary -source operational noise impacts at the nearby receiver locations, identified in Section 6, resulting from the typical the operation of the Project. Exhibit 7-A identifies the representative noise source locations used to assess the operational noise levels.

7.1 OPERATIONAL NOISE SOURCES
This noise analysis describes the noise level impacts associated with the expected typical operational activities related to residential use at the Project site. The on -site Project -related operational noise sources are expected to include: roof -top mechanical, outdoor activity, pool activity, and parking lot activity.

7.2 REFERENCE OPERATIONAL NOISE LEVELS
To estimate the Project operational noise impacts, reference noise level measurements were collected from similar types of activities to represent the noise levels expected with the development of the proposed Project. This section provides a detailed description of the reference noise level measurements shown on Table 7-1 used to estimate the Project operational noise impacts. It is important to note that the following projected noise levels assume the worst - case noise environment with the roof -top mechanical, outdoor activity, pool activity, and parking lot activity. Appendix 7.1 includes the detailed calculations for the Project operational noise levels presented in this section.

7.2.1 MEASUREMENT PROCEDURES
The reference noise level measurements presented in this section were collected using a combination of Type 1 and Type 2 sound level meters. Each sound level meter was programmed in "slow" mode to record noise levels in "A" weighted form and calibrated prior to each measurement. The sound level meters and microphones were equipped with a windscreen during all measurements. All noise level measurement equipment satisfies the American National Standards Institute (ANSI) standard specifications for sound level meters ANSI S1.4- 2014/IEC 61672-1:2013. (18)
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1401 Quail Street Residential Apartments Noise Impact Analysis EXHIBIT 7-A: OPERATIONAL NOISE SOURCES
14001
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L-] Site Boundary Q Parking Lot Vehicle Movements U Pool Activity O Roof -Top Air Conditioning Unit Outdoor Activity Area 15418-06 Noise_Study.docx URBAN
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1401 Quail Street Residential Apartments Noise Impact Analysis TABLE 7-1: REFERENCE NOISE LEVEL MEASUREMENTS
Noise Source
Noise
Source
Height
(Feet)
Min./Hour4
Reference
Noise
Level
(dBA Leq)
Sound
Power
Level
(dBA)6
Day
Night
Roof -Top Mechanical Exhaust'
3'
45 30

43.4 75.0
Outdoor Activity'
5'
60 0

62.9 94.5
Pool Activity'
5'
60 0

48.7 80.3
Parking Lot Activity'
5'
60 60

44.7 76.3
' Reference Carrier model 24ACC4
'As measured by Urban Crossroads, Inc.
'Anticipated duration (minutes within the hour) of noise activity during typical hourly conditions expected at the Project site. "Daytime" = 7:00 a.m. to 10:00 p.m.; "Nighttime" = 10:00 p.m. to 7:00 a.m.

7.2.2 REFERENCE ROOF -TOP MECHANICAL EXHAUST
To assess the noise levels created by the roof -top air conditioning units, reference noise levels were taken from the Carrier model 24ACC4 product data sheet. The product data sheet for Carrier model 24ACC4 planned for the Project will produce a maximum sound power level of 75 dBA. The roof -top air conditioning units were modeled as operating 45 minutes per hour during the daytime and 30 minutes during the nighttime, which represents typical maximum operating conditions. For this noise analysis, the air conditioning units are expected to be located on the roof of the proposed buildings. The roof -top air conditioning units are anticipated to be located 3 feet above the roof.

7.2.3 OUTDOOR ACTIVITY
To describe the outdoor activity areas, a reference noise level measurement was taken. At 50 feet, the reference noise level is 62.9 dBA Leq at a noise source height of 5 feet. The reference noise level measurement includes outdoor eating, drinking, with laughing and talking with background music etc. collected by Urban Crossroads, Inc. The outdoor activity is expected to be limited to the daytime hours of 7:00 a.m. to 10:00 p.m.

7.2.4 SWIMMING POOL ACTIVITY
To represent the noise levels associated with pool activities, Urban Crossroads collected a reference noise level measurement at a clubhouse pool in an unincorporated community of County of Orange. The measured reference noise level at the uniform 50-foot reference distance is 48.7 dBA Leq for pool activity. The pool activity noise levels include kids playing, running, screaming, splashing, playing with a ball, and parents talking. The swimming pool activity is expected to be limited to the daytime hours of 7:00 a.m. to 10:00 p.m.

7.2.5 PARKING LOT ACTIVITY
To determine the noise levels associated with parking lot vehicle movements, Urban Crossroads collected reference noise level measurements over a 24-hour period at a parking lot similar in 15418 06 Noise_Study.docx �1► URBAN

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1401 Quail Street Residential Apartments Noise Impact Analysis size as proposed for the Project. The measured reference noise level at 50 feet from parking lot vehicle movements was measured at 44.7 dBA Leq. The parking lot noise levels are mainly due to cars pulling in and out of spaces and people talking. Noise associated with parking lot vehicle movements is expected to operate for the entire hour (60 minutes) day and night.

7.3 CADNAA NOISE PREDICTION MODEL
To fully describe the exterior operational noise levels from the Project, Urban Crossroads, Inc. developed a noise prediction model using the CadnaA (Computer Aided Noise Abatement) computer program. CadnaA can analyze multiple types of noise sources using the spatially accurate Development Site plan, georeferenced Nearmap aerial imagery, topography, buildings, and barriers in its calculations to predict outdoor noise levels.

Using the ISO 9613 protocol, CadnaA will calculate the distance from each noise source to the noise receiver locations, using the ground absorption, distance, and barrier/building attenuation inputs to provide a summary of noise level at each receiver and the partial noise level contributions by noise source. Consistent with the ISO 9613 protocol, the CadnaA noise prediction model relies on the reference sound power level (PWL) to describe individual noise sources. While sound pressure levels (e.g. Leq) quantify in decibels the intensity of given sound sources at a reference distance, sound power levels (PWL) are connected to the sound source and are independent of distance. Sound pressure levels vary substantially with distance from the source and diminish from intervening obstacles and barriers, air absorption, wind, and other factors. Sound power is the acoustical energy emitted by the sound source and is an absolute value that is not affected by the environment. The operational noise level calculations provided in this noise study account for the distance attenuation provided due to geometric spreading, when sound from a localized stationary source (i.e., a point source) propagates uniformly outward in a spherical pattern. A default ground attenuation factor of 0.5 was used in the CadnaA noise analysis to account for a mix of hard and soft site conditions. Appendix 7.1 includes the detailed noise model inputs.

7.4 PROJECT OPERATIONAL NOISE LEVELS
Using the reference noise levels to represent the proposed Project operations that include roof- top mechanical, outdoor activity, pool activity, and parking lot activity, Urban Crossroads, Inc. calculated the operational source noise levels that are expected to be generated at the Project site and the Project -related noise level increases that would be experienced at each of the sensitive receiver locations. Table 7-2 shows the Project operational noise levels during the daytime hours of 7:00 a.m. to 10:00 p.m. The daytime hourly noise levels at the off -site receiver locations are expected to range from 36.1 to 57.2 dBA Leq. 15418 06 Noise_Study.docx �"► URBAN

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1401 Quail Street Residential Apartments Noise Impact Analysis TABLE 7-2: DAYTIME PROJECT OPERATIONAL NOISE LEVELS
Noise Sources
Operational Noise Levels by Receiver Location (dBA Leq) R1
R2
R3
R4
Roof -Top Mechanical Exhaust

34.1 33.6

25.8 32.4
Outdoor Activity

31.6 57.1

38.5 37.5
Pool Activity

11.0 31.0

17.1 16.5
Parking Lot Activity

2.4 34.2

13.3 9.5
Total (All Noise Sources)

36.1 57.2

38.8 38.7
' See Exhibit 7-A for the noise source locations. CadnaA noise model calculations are included in Appendix 7.1.

Table 7-3 shows the Project operational noise levels during the nighttime hours of 10:00 p.m. to 7:00 a.m. The nighttime hourly noise levels at the off -site receiver locations are expected to range from 23.5 to 35.2 dBA Leq. The differences between the daytime and nighttime noise levels is largely related to the duration of noise activity (Table 7-1).

TABLE 7-3: NIGHTTIME PROJECT OPERATIONAL NOISE LEVELS
Noise Sources
Operational Noise Levels by Receiver Location (dBA Leq) R1
R2
R3
R4
Roof -Top Mechanical Exhaust

31.5 30.9

23.1 29.7
Outdoor Activity

0.0 0.0

0.0 0.0
Pool Activity

0.0 0.0

0.0 0.0
Parking Lot Activity

1.5 33.2

12.3 8.5
Total (All Noise Sources)

31.5 35.2

23.5 29.7
' See Exhibit 7-A for the noise source locations. CadnaA noise model calculations are included in Appendix 7.1.

7.5 PROJECT OPERATIONAL NOISE LEVEL COMPLIANCE
To demonstrate compliance with local noise regulations, the Project -only operational noise levels are evaluated against the City of Newport Beach exterior noise level standards at nearest noise - sensitive receiver locations. For the noise -sensitive residential land use, the City of Newport Beach has established exterior noise level standards of 55 dBA Leq during the daytime hours (7:00 a.m. to 10:00 p.m.) and 50 dBA Leq during the nighttime hours (10:00 p.m. to 7:00 a.m.) and 65 dBA Leq during daytime hours and 60 dBA Leq during nighttime hours at commercial properties. (12) In the event the ambient noise level exceeds the noise standard, the maximum allowable noise level under said category shall be increased to reflect the maximum ambient noise level (Section 10.26.025(C)). While the Section 10.26.025(C) of City of Newport Beach Municipal Code permits the use of the existing ambient noise level to describe the base exterior noise level standards, this analysis relies on the more conservative and restrictive standards outlined in Section 10.26.025(A). Table 7-4 shows that the operational noise levels associated with 1401 Quail Street Residential Apartments Project will satisfy the City of Newport Beach exterior noise 15418 06 Noise_Study.docx �1 URBAN

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1401 Quail Street Residential Apartments Noise Impact Analysis level standards at all nearest receiver locations. Therefore, the operational noise impacts are considered less than significant at the nearest noise -sensitive receiver locations.

TABLE 7-4: OPERATIONAL NOISE LEVEL COMPLIANCE
Receiver
Location'
Project Operational
Noise Levels (dBA Leq)'
Noise Level Standards
(dBA Leq)3
Noise Level Standards
Exceeded?°
Daytime
Nighttime
Daytime
Nighttime
Daytime
Nighttime
R1

36.1 31.5
65 60
No
No
R2

57.2 35.2
65 60
No
No
R3

38.8 23.5
55 50
No
No
R4

38.7 29.7
65 60
No
No
'See Exhibit 7-A for the noise source locations.
z Proposed Project operational noise levels as shown on Tables 7-2 and 7-3. s Based on Section 10.26.025(A).
n Do the estimated Project operational noise source activities exceed the noise level standards? "Daytime" = 7:00 a.m. to 10:00 p.m.; "Nighttime" = 10:00 p.m. to 7:00 a.m.

7.6 PROJECT OPERATIONAL NOISE LEVEL INCREASE
To describe the Project operational noise level increases, the Project operational noise levels are combined with the existing ambient noise levels measurements for the nearest receiver locations potentially impacted by Project operational noise sources. Since the units used to measure noise, decibels (dB), are logarithmic units, the Project -operational and existing ambient noise levels cannot be combined using standard arithmetic equations. (2) Instead, they must be logarithmically added using the following base equation:

SPLTotal = 10log1p[10SPL1/10 + 10SPL2/10 + 10SPLn/10]
Where "SPL1," "SPL2," etc. are equal to the sound pressure levels being combined, or in this case, the Project -operational and existing ambient noise levels. The difference between the combined Project and ambient noise levels describes the Project noise level increases to the existing ambient noise environment.

The Project site is located approximately 400 feet north of SR-73 and located along the 60 CNEL noise level contour of the JWA. According to the 2021 Caltrans traffic census data, in the vicinity of the Project site, SR-73 has average daily traffic (ADT) volumes ranging from 120,000 to 130,000, which would expose the site to traffic noise levels up to 74 to 76 dBA Leq. (19) Therefore, ambient noise levels in the Project area are anticipated to range from 60 to 76 dBA Leq. Based on Table 7-4, Project generated noise levels at the nearest noise sensitive receiver (R3) are anticipated to range from 23.5 to 38.8 dBA Leq. Adding the on the minimum ambient noise level anticipated in the Project area of approximately 60 dBA Leq and the Project's maximum noise level of 38.8 dBA Leq, the Project would not result in any increase in noise levels at the nearest noise sensitive receiver (133). Therefore, Project -related operational noise level increases will satisfy the operational noise level increase significance criteria presented on Table 4-1.

Therefore, the incremental Project operational noise level increase is considered less than significant at all receiver locations.
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1401 Quail Street Residential Apartments Noise Impact Analysis 8 CONSTRUCTION NOISE IMPACTS
Construction noise represents the combination of several types of equipment, the location of the equipment, and the duration of the noise -generating activities through different stages of construction. Each stage of construction involves the use of different types of construction equipment with unique noise characteristics operating at the varying distances within the construction activity area.

This section analyzes potential impacts resulting from the short-term construction activities associated with the development of the Project. Exhibit 8-A shows the construction activity boundaries in relation to the nearest sensitive receiver locations.

8.1 CONSTRUCTION NOISE SOURCES
Noise generated by the Project construction source equipment will include a combination of trucks, power tools, concrete mixers, and portable generators that when combined can reach high levels. The number and mix of construction equipment is expected to occur in the following stages:
• Demolition
• Site Preparation
• Grading
• Building Construction
• Paving
• Architectural Coating
This construction noise analysis was prepared using reference noise level measurements taken by Urban Crossroads, Inc. to describe the typical construction activity noise levels for each stage of Project construction. The construction reference noise level measurements represent a list of typical construction activity noise levels. Noise levels generated by heavy construction equipment can range from approximately 68 dBA to more than 80 dBA when measured at 50 feet. However, these noise levels diminish with distance from the construction site at a rate of 6 dBA per doubling of distance. For example, a noise level of 80 dBA measured at 50 feet from the noise source to the receiver would be reduced to 74 dBA at 100 feet from the source to the receiver, and would be further reduced to 68 dBA at 200 feet from the source to the receiver. At distances of less than 50 feet the noise levels will increase at a rate of 6 dBA per halving of distance.
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1401 Quail Street Residential Apartments Noise Impact Analysis EXHIBIT8-A: CONSTRUCTION ACTIVITY AND RECEIVER LOCATIONS 41 �i 4 T �` 4 -•O F
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® Construction Activity ii� Receiver Locations Distance from receiver to construction activity (in feet) 15418 06 Noise_Study.docx ��► URBAN
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1401 Quail Street Residential Apartments Noise Impact Analysis

8.2 CONSTRUCTION REFERENCE NOISE LEVELS
To describe construction noise activities, this construction noise analysis was prepared using reference construction equipment noise levels from the Federal Highway Administration (FHWA) published the Roadway Construction Noise Model (RCNM), which includes a national database of construction equipment reference noise emission levels. (20) The RCNM equipment database, provides a comprehensive list of the noise generating characteristics for specific types of construction equipment. In addition, the database provides an acoustical usage factor to estimate the fraction of time each piece of construction equipment is operating at full power (i.e., its loudest condition) during a construction operation. The reference noise level summary shown in Table 8-1 describes construction activity noise levels with multiple pieces of equipment operating simultaneously.

TABLE 8-1: CONSTRUCTION REFERENCE NOISE LEVELS
Construction
Stage
Reference
Construction
Equipmnet
Reference Noise
Level @ 50 Feet
(dBA Leq)
Composite Reference
Noise Level
(dBA Leq)
Demolition
Concrete Saw

83.0 84.4
Excavator

77.0 Backhoe

74.0 Site
Preparation
Tractor

80.0 82.9
Front End Loader

75.0 Dozer

78.0 Grading
Tractor

80.0 84.2
Grader

81.0 Compactor (ground)

76.0 Building
Construction
Crane

73.0 82.1
Generator

78.0 Gradall

79.0 Paving
Paver

74.0 77.8
Dump Truck

72.0 Roller

73.0 Architectural
Coating
Man Lift

68.0 76.2
Compressor (air)

74.0 Generator (<25kVA)

70.0 ' FHWA Road Construction Noise Model.

8.3 CONSTRUCTION NOISE ANALYSIS
Table 8-2 provides a summary of the construction noise levels at the nearest noise -sensitive receiver locations. Using the reference construction equipment noise levels and the CadnaA noise prediction model, calculations of the Project construction noise level impacts at the nearby 15418 06 Noise_Study.docx �10 URBAN

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1401 Quail Street Residential Apartments Noise Impact Analysis sensitive receiver locations were completed. To account for the dynamic nature of construction activities, the Project construction noise analysis models the typical construction equipment as combination of the highest reference level as multiple moving points within the construction area (Project site boundary). Appendix 8.1 includes the detailed calculations for the Project construction noise levels presented in this section.

TABLE 8-2: CONSTRUCTION ACTIVITY NOISE LEVEL SUMMARY
Construction Noise Levels (dBA L,)
Receiver
Locations
Demolition
Site
preparation
Grading
Building
Construction
paving
Architectural
Coating
Highest
LevelSZ
R1

66.9 65.7

64.0 64.2

60.4 59.2

66.9 R2

70.3 69.1

67.4 67.6

63.8 62.6

70.3 R3

53.1 51.9

50.2 50.4

46.6 45.4

53.1 R4

71.5 70.3

68.6 68.8

65.0 63.8

71.5 Noise receiver locations are shown on Exhibit 6-A.

Construction noise level calculations based on distance from the construction activity, which is measured from the Project site boundary to the nearest receiver locations. CadnaA construction noise model inputs are included in Appendix 8.1.

8.4 CONSTRUCTION NOISE LEVEL COMPLIANCE
The applicant has stated that they will abide by restrictions set by The City of Newport Beach to control noise impacts associated with the construction of the proposed Project. According to the City of Newport Beach Municipal Code Section 10.28.040 (included in Appendix 3.2):

A. No person shall, while engaged in construction, remodeling, digging, grading, demolition, painting, plastering or any other related building activity, operate any tool, equipment or machine in a manner which produces loud noise that disturbs, or could disturb, a person of normal sensitivity who works or resides in the vicinity, unless authorized to do so in accordance with subsection (B) of this section.

B. The provisions of subsection (A) of this section shall not apply to the following:

1. Work performed on any weekday, which is not a federal holiday, between the hours of 7:00 a.m. and 6:30 p.m.

2. Work performed on a Saturday, in any area of the City that is not designated as a high - density area, between the hours of 8:00 a.m. and 6:00 p.m.

3. Emergency work performed pursuant to written authorization of the Community Development Director, or his or her designee.

Construction activities are considered exempt from the noise standards of the noise ordinance if limited to the hours of 7:00 a.m. to 6:30 p.m. on Mondays to Fridays, and 8:00 a.m. to 6:00 p.m. 15418 06 Noise_Study.docx �1 URBAN
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1401 Quail Street Residential Apartments Noise Impact Analysis on Saturdays, with no activity allowed on Sundays or national holidays. (13) For informational purposes, the Project's construction noise levels are compared against the FTA's acceptable noise level of 80 dBA Leq for sensitive receiver locations. Table 8-3 shows the highest construction noise levels at the potentially impacted receiver locations are estimated to range from 53.1 to 71.5 dBA Leq The noise impact due to Project construction noise levels is considered a less than significant impact at all nearest sensitive receiver locations.

TABLE 8-3: CONSTRUCTION EQUIPMENT NOISE LEVEL COMPLIANCE Receiver
Location'
Land Use'
Highest Construction
Noise Levels (dBA LeQ)'
R1- (1150 Granville Dr.)
Office

66.9 R2 - (210 Newport Center Drive)
Office

70.3 R3 - (Civic Center Park)
Residential

53.1 R4 - (160 Newport Center Drive)
Office

71.5 Noise receiver locations are shown on Exhibit 6-A. z City of Newport Beach Interactive Map (Zoning)
s Estimated construction noise levels during peak operating conditions, as shown on Table 8-2.

These less than significant findings are consistent with the 2006 General Plan Environmental Impact Report (EIR) (15): Construction activities would be an ongoing occurrence in the City and, in particular cases, could occur in close proximity to noise -sensitive uses. Although the proposed General Plan Update limits construction activities to specific days of the week and hours of the day, construction equipment generates high noise levels, as shown in Table 4.9-9 and may not always be reducible to the levels specified in the City Noise Ordinance. Section 10.26.035 of the Municipal Code (Exemptions), exempts "noise sources associated with construction, repair, remodeling, demolition, or grading of any real property." Section 10.26.035 also states that construction noise should fall under the provisions of Section 10.28 of the Code (Loud and Unreasonable Noise). Thus, construction noise is not subject to the noise standards in the Municipal Code, but only during limited hours of the day and days of the week. In sum, existing and future construction noise levels at individual construction sites may not substantially differ, but previously unexposed areas could experience new sources of construction noise. Both existing and future noise would be exempt from the City code and when construction noise occurs, impacts would be considered less than significant.

8.5 CONSTRUCTION VIBRATION IMPACTS
Construction has the potential to result in varying degrees of temporary ground vibration, depending on the specific construction activities and equipment used. Ground vibration levels associated with various types of construction equipment are summarized on Table 8-4. Based on the representative vibration levels presented for various construction equipment types, it is possible to estimate the human response (annoyance) using the following vibration assessment 15418 06 Noise_Study.docx �1 URBAN

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1401 Quail Street Residential Apartments Noise Impact Analysis methods defined by the FTA. To describe the human response (annoyance) associated with vibration impacts the FTA provides the following equation: LVdB(D) = LVdB(25 ft) — 30log(D/25).

TABLE 8-4: VIBRATION SOURCE LEVELS FOR CONSTRUCTION EQUIPMENT Equipment
Vibration Decibels (VdB)
at 25 feet'
Small bulldozer
58 Jackhammer
79 Loaded Trucks
86 Large bulldozer
87 Source: Federal Transit Administration, Transit Noise and Vibration Impact Assessment It is expected that ground -borne vibration from Project construction activities would cause only intermittent, localized intrusion. The proposed Project's construction activities most likely to cause vibration impacts are:
• Heavy Construction Equipment: Although all heavy mobile construction equipment has the potential of causing at least some perceptible vibration while operating close to buildings, the vibration is usually short-term and is not of sufficient magnitude to cause building damage. • Trucks: Trucks hauling building materials to construction sites can be sources of vibration intrusion if the haul routes pass through residential neighborhoods on streets with bumps or potholes. Repairing the bumps and potholes generally eliminates the problem.

Ground -borne vibration levels resulting from construction activities occurring within the Project site were estimated by data published by the Federal Transit Administration (FTA). Using the vibration source level of construction equipment provided on Table 8-4 and the construction vibration assessment methodology published by the FTA, it is possible to estimate the Project vibration impacts. Table 8-5 shows the highest construction vibration levels are estimated to range from 10.4 to 78.2 VdB. Using the construction vibration assessment methods provided by the FTA, Project construction vibration levels would not exceed the 78 VdB threshold at the nearest residential receiver location or the 84 VdB threshold at any commercial receiver location, and therefore, is considered a less than significant impact. Further, vibration levels at the site of the closest sensitive receiver are unlikely to be sustained during the entire construction period but will occur rather only during the times that heavy construction equipment is operating at the Project site perimeter.
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1401 Quail Street Residential Apartments Noise Impact Analysis TABLE 8-5: CONSTRUCTION EQUIPMENT VIBRATION LEVELS
Receiver Vibration Levels (VdB)z
Distance to
Highest
Receiver
Land
Construction
Threshold
Threshold
Location'
Use
Activity
Small
Jack-
Loaded
Large
Vibration
(VdB)3
Exceeded?'
(Feet)
Bulldozer
hammer
Trucks
Bulldozer
Levels
R1
Office
99,

40.1 61.1

68.1 69.1

69.1 84
No
R2
Office
59'

46.8 67.8

74.8 75.8

75.8 84
No
R3
Residential
968'

10.4 31.4

38.4 39.4

39.4 84
No
R4
Office
49'

49.2 70.2

77.2 78.2

78.2 84
No
'Noise receiver locations are shown on Exhibit 6-A.

Based on the Vibration Source Levels of Construction Equipment included on Table 8-4. s Federal Transit Administration, Transit Noise and Vibration Impact Assessment. n Does the vibration level exceed the FTA acceptable vibration level for the given land use? 15418-06 Noise_Study.docx
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1401 Quail Street Residential Apartments Noise Impact Analysis 9 AIRPORT NOISE EXPOSURE
As shown on Exhibit 3-13, based on Annual CNEL Noise Contours contained in the City's General Plan, the Project site is located between the 65 CNEL and the 60 dBA CNEL aircraft noise level contours. Therefore, according to the AELUP, the Project site is considered conditionally consistent for residential land uses with JWA aircraft noise exposure exterior noise level compatibility threshold. Furthermore, this is consistent with the City of Newport Beach General Plan land use and noise compatibility policies related to airport noise.

Typical building construction will provide a Noise Reduction (NR) of approximately 12 dBA with "windows open" and a minimum 25 dBA noise reduction with "windows closed." Based on JWA aircraft noise levels ranging from 60 to 63 dBA CNEL, interior noise levels would range from 35 dBA to 38 dBA CNEL. Thus, this noise level analysis shows that the 45 dBA CNEL interior noise standard can be satisfied using standard construction and complying with statutory and regulatory noise requirements for all residential units exposed to aircraft noise from JWA.

Therefore, the Project would not expose people residing or working in the project area to excessive noise levels from airport or aircraft operations, and impacts would be less than significant.

In addition, the County of Orange has adopted the General Aviation Noise Ordinance (GANG) that prohibits commercial aircraft departures between the hours of 10:00 p.m. and 7:00 a.m. and arrivals between the hours of 11:00 p.m. and 7:00 a.m. (21) These restrictions substantially reduce the aircraft noise levels impacts during the noise sensitive nighttime hours for residential use.
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1401 Quail Street Residential Apartments Noise Impact Analysis 10 REFERENCES

1. State of California. California Environmental Quality Act, Appendix G & Amendments and Additions to the State CEQA Guidelines. 2019.

2. California Department of Transportation Environmental Program. Technical Noise Supplement - A Technical Supplement to the Traffic Noise Analysis Protocol. Sacramento, CA : s.n., September 2013.

3. Environmental Protection Agency Office of Noise Abatement and Control. Information on Levels of Environmental Noise Requisite to Protect Public Health and Welfare with an Adequate Margin of Safety. March 1974. EPA/ONAC 550/9/74-004.

4. U.S. Department of Transportation, Federal Highway Administration, Office of Environment and Planning, Noise and Air Quality Branch. Highway Traffic Noise Analysis and Abatement Policy and Guidance. June, 1995.

5. U.S. Department of Transportation, Federal Highway Administration. Highway Traffic Noise in the United States, Problem and Response. April 2000. p. 3.

6. U.S. Environmental Protection Agency Office of Noise Abatement and Control. Noise Effects Handbook -A Desk Reference to Health and Welfare Effects of Noise. October 1979 (revised July 1981).

EPA 550/9/82/106.

7. U.S. Department of Transportation, Federal Transit Administration. Transit Noise and Vibration Impact Assessment Manual, FTA Report No. 0123. September 2018.

8. California Department of Transportation. Transportation and Construction Vibration Guidance Manual. April 2020.

9. U.S. Department of Transportation, Federal Transit Administration. Transit Noise and Vibration Impact Assessment Manual, FTA-VA-90-1003-06. May 2006.

10. Office of Planning and Research. State of California General Plan Guidelines. 2018.

11. City of Newport Beach. General Plan Noise Element. November, 2006.

12. -. Municipal Code, Chapter 10.26 Community Noise Control.

13. -. Municipal Code, Chapter 10.28 Loud and Unreasonable Noise.

14. U.S. Department of Transportation, Federal Transit Administration. Transit Noise and Vibration Impact Assessment Manual. September 2018.

15. City of Newport Beach. Draft Environmental Impact Report General Plan 2006 Update. April 2006.

16. Orange County Airport Land Use Commission. Land Use Plan for John Wayne Airport. April 2008.

17. John Wayne Airport Orange County. 2022 Annual Community Noise Egivalent Level (CNEL) Contours. s.l.: HMMH, Inc., 2022.

18. American National Standards Institute (ANSI). Specification for Sound Level Meters ANSI 51.4- 201411EC 61672-1:2013.

19. California Department of Transportation. Traffic Census Program, Traffic Volumes: Annual Average Daily Traffic (AADT), 2021 AADT. 2022.

20. U.S. Department of Transportation, Federal Highway Administration, Office of Environment and Planning. FHWA Roadway Construction Noise Model. January, 2006.

21. County of Orange. General Aviation Operations Sec. 2-1-30.5. 2015. 15418-06 Noise_Study.docx
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1401 Quail Street Residential Apartments Noise Impact Analysis 11 CERTIFICATION
The contents of this noise study report represent an accurate depiction of the noise environment and impacts associated with the proposed 1401 Quail Street Residential Apartments Project. The information contained in this noise study report is based on the best available data at the time of preparation. If you have any questions, please contact me directly at (619) 778-1971.

William Maddux
Senior Associate
URBAN CROSSROADS, INC.
(619) 788-1971
bmaddux(@urbanxroads.com

EDUCATION
Bachelor of Science in Urban and Regional Planning
California Polytechnic State University, Pomona • June 2000

PROFESSIONAL AFFILIATIONS
ASA — Acoustical Society of America
AEP —Association of Environmental Planners
AWMA—Air and Waste Management Association
INCE — Institute of Noise Control Engineers

PROFESSIONAL CERTIFICATIONS
Approved Acoustical Consultant • County of San Diego
FHWA Traffic Noise Model of Training • November 2004
CadnaA Basic and Advanced Training Certificate • October 2008. 15418-06 Noise_Study.docx ► URBAN
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1401 Quail Street Residential Apartments Noise Impact Analysis APPENDIX 3.1:

CITY OF NEWPORT BEACH MUNICIPAL CODE CHAPTER 10.26
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Chapter 10.26

COMMUNITY NOISE CONTROL
Sections:

10.26.005 Declaration of Policy.

10.26.010 Definitions.

10.26.015 Decibel Measurement Criteria.

10.26.020 Designated Noise Zones.

10.26.025 Exterior Noise Standards.

10.26.030 Interior Noise Standards.

10.26.035 Exemptions.

10.26.040 Schools, Day Care Centers, Churches, Libraries, Museums, Health Care Institutions —Special Provisions.

10.26.045 Heating, Venting and Air Conditioning —Special Provisions.

10.26.050 Sound -Amplifying Equipment.

10.26.055 Noise Level Measurement.

10.26.065 Proposed Developments.

10.26.070 Prima Facie Violation.

10.26.075 Violations.

10.26.080 Violations —Additional Remedies —Injunctions.

10.26.085 City Manager Waiver.

10.26.090 Noise Abatement Programs.

10.26.095 Manner of Enforcement.

10.26.100 Severability.

10.26.005 Declaration of Policy.
..................................................................................................................................................................................................................................................................................................................................

A. In order to control unnecessary, excessive and annoying noise in the City of Newport Beach, it is declared to be the policy of the City to prohibit such noise generated from or by all sources as specified in this chapter.

B. It is determined that certain noise levels are detrimental to the public health, welfare and safety and contrary to public interest, therefore, the City Council of the City of Newport Beach does ordain and declare that creating, maintaining, causing or allowing to be created, caused or maintained, any noise in a manner prohibited by, or not in conformity with, the provisions of this chapter, is a public nuisance and may be punished as a public nuisance.

The ordinance codified in this chapter is effective thirty (30) days from adoption, however, all fixed noise sources existing at the date of adoption shall have ninety (90) days from the date of adoption to achieve compliance with this chapter. (Ord. 95-38 § 11 (part), 1995)

10.26.010 Definitions.
..................................................................................................................................................................................................................................................................................................................................

The following words, phrases and terms as used in this chapter shall have the meanings as indicated here:
"Agricultural property" means a parcel of real property which is undeveloped for any use other than agricultural purposes.
"Ambient noise level" means the all -encompassing noise level associated with a given environment, being a composite of sounds from all sources, excluding the alleged offensive noise, at the location and approximate time at which a comparison with the alleged offensive noise is to be made. "A -weighted sound level" means the total sound level meter with a reference pressure of twenty (20) micropascals using the A -weighted network (scale) at slow response. The unit of measurement shall be defined as DBA.

"Code Enforcement Officer" means the Code Enforcement Officer of the City or his duly authorized deputy. "Commercial property" means a parcel of real property which is used as either in part or in whole for commercial purposes.
"Cumulative period" means an additive period of time composed of individual time segments which may be continuous or interrupted.
"Decibel (Db)" means a unit which denotes the ratio between two quantities which are proportional to power: the number of decibels corresponding to the ratio of two amounts of power is ten times the logarithm to the base ten of this ratio.
"Dwelling unit" means any area within a structure on any parcel which:

1. Contains separate or independent living facilities for one or more persons, with an area or equipment for sleeping, sanitation and food preparation, and which has independent exterior access to ground level; or

2. Is being utilized for residential purposes by one or more persons separately or independently from occupants of other areas within the structure.
"Emergency machinery, vehicle, work or alarm" means any machinery, vehicle, work or alarm used, employed, performed or operated in an effort to protect, provide or restore safety conditions in the community or for the citizenry, or work by private or public utilities when restoring utility service. "Equivalent, noise, level, leq." means the sound level corresponding to a steady state noise level over a given measurement period with the same amount of acoustic energy as the actual time varying noise level. Also known as the energy average noise level during the measurement period. The measurement period shall be fifteen (15) minutes under the terms of this chapter.
"Fixed noise source" means a stationary device which creates sounds while fixed or motionless including but not limited to residential, agricultural, industrial and commercial machinery and equipment, pumps, fans, compressors, air conditioners and refrigeration equipment. "Grading" means any excavating of filling of earth material or any combination thereof conducted at a site to prepare said site for construction or other improvements thereon. "Health care institution" means any hospital, convalescent home or other similar facility excluding residential. "Hertz (HZ)" means the unit which describes the frequency of a function periodic in time which is the reciprocal of the period.
"Impulsive noise" means a noise of short duration usually less than one second and of high intensity, with an abrupt onset and rapid decay.
"Industrial property" means a parcel of real property which is used either in part or in whole for manufacturing purposes.
"Intruding noise level" means the total sound level, in decibels, created, caused, maintained or originating from an alleged offensive source at a specified location while the alleged offensive source is in operation. "Licensed" means the issuance of a formal license or permit by the appropriate jurisdictional authority, or where no permits or licenses are issued, the sanctioning of the activity by the jurisdiction as noted in public record. "Major roadway" means any street, avenue, boulevard or highway used for motor vehicle traffic which is owned or controlled by a public government entity.

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"Mobile noise source" means any noise source other than a fixed noise source. "Person" means any individual, firm, partnership, association, corporation, company or organization of any kind, including public agencies.
"Residential property" means a parcel of real property which is used either in part or in whole for residential purposes, other than transient uses such as hotels and motels, and residential care facilities. Residential property includes the residential portion of mixed use properties. "Simple tone noise" means a noise characterized by a predominant frequency or frequencies so that other frequencies cannot be readily distinguished. If measured, simple tone noise shall exist if the one-third octave band sound pressure levels in the band with the tone exceeds the arithmetic average of the sound pressure levels of the two continuous one-third octave bands as follows: five Db for frequencies of five hundred (500) Hertz (Hz) and above or, by fifteen (15) Db for frequencies less than or equal to one hundred twenty-three (123) Hz. "Sound level meter" means an instrument meeting American National Standard Institute's Standard S1.4-1971 or most recent revision thereof for Type 2 sound level meters or an instrument and the associated recording and analyzing equipment which will provide equivalent data. "Sound pressure level" of a sound, in decibels, means twenty (20) times the logarithm to the base ten of the ratio of the pressure of the sound to a reference pressure which shall be explicitly stated. "Vibration" means any movement of the earth, ground or other similar surface created by a temporal and spatial oscillation device or equipment located upon, affixed in conjunction with that surface. (Ord. 95-38 § 11 (part), 1995)

10.26.015 Decibel Measurement Criteria.
..................................................................................................................................................................................................................................................................................................................................

Any decibel measurement made pursuant to the provisions of this chapter shall be based on a reference sound pressure of twenty (20) micropascals as measured with a sound level meter using the A -weighted network (scale) at slow response. (Ord. 95-38 § 11 (part), 1995)

10.26.020 Designated Noise Zones.
..................................................................................................................................................................................................................................................................................................................................

The properties hereinafter described assigned to the following noise zones:

Noise Zone I — All single-, two- and multiple -family
residential properties;
Noise Zone 11 — All commercial properties;
Noise Zone III — The residential portion of mixed -use
properties;
Noise Zone IV — All manufacturing or industrial properties.

The actual use of the property shall be the determining factor in establishing whether a property is in Noise Zone I, 11, III or IV provided that the actual use is a legal use in the City of Newport Beach. (Ord. 95-38 § 11 (part), 1995)

10.26.025 Exterior Noise Standards.
..................................................................................................................................................................................................................................................................................................................................

A. The following noise standards, unless otherwise specifically indicated, shall apply to all property with a designated noise zone:

ALLOWABLE EXTERIOR NOISE LEVEL (Equivalent Noise
Level, Leq)

NOISE TYPE OF LAND

ZONE USE
7 a.m. to 10 p.m.
10 p.m. to 7 a.m.

I Single-, two -or
55 DBA
50 DBA
multiple -family
residential
II Commercial
65 DBA
60 DBA
III Residential
60 DBA
50 DBA
portions of
mixed -use
properties
IV Industrial or
70 DBA
70 DBA
manufacturing
If the ambient noise level exceeds the resulting standard, the ambient shall be the standard.

B. It is unlawful for any person at any location within the incorporated area of the City to create any noise, or to allow the creation of any noise on property owned, leased, occupied or otherwise controlled by such person, which causes the noise level when measured on any other property, to exceed either of the following:

1. The noise standard for the applicable zone for any fifteen -minute period;

2. A maximum instantaneous noise level equal to the value of the noise standard plus twenty (20) DBA for any period of time (measured using A -weighted slow response).

C. In the event the ambient noise level exceeds the noise standard, the maximum allowable noise level under said category shall be increased to reflect the maximum ambient noise level.

D. The Noise Zone III standard shall apply to that portion of residential property falling within one hundred (100) feet of a commercial property, if the intruding noise originates from that commercial property.

E. If the measurement location is on boundary between two different noise zones, the lower noise level standard applicable to the noise zone shall apply. (Ord. 95-53 § 1, 1995; Ord. 95-38 § 11 (part), 1995)

10.26.030 Interior Noise Standards.
..................................................................................................................................................................................................................................................................................................................................

A. The following noise standard, unless otherwise specifically indicated, shall apply to all residential property within all noise zones:

NOISE TYPE OF LAND

ZONE USE
I Residential
III Residential
portions of
mixed -use
properties
ALLOWABLE INTERIOR NOISE LEVEL (Equivalent Noise
Level, Leq)
7a.m.to10p.m
45 DBA
45 DBA
10 p.m. to 7 a.m.
40 DBA
40 DBA
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If the ambient noise level exceeds the resulting standard, the ambient shall be the standard.

B. It shall be unlawful for any person at any location within the incorporated area of the City to create any noise or to allow the creation of any noise on property owned, leased, occupied or otherwise controlled by such a person which causes the noise level when measured on any other property, to exceed either of the following:

1. The noise standard for the applicable zone for any fifteen -minute period;

2. A maximum instantaneous noise level equal to the value of the noise standard plus twenty (20) DBA for any period of time (measured using A -weighted slow response).

C. In the event the ambient noise level exceeds the noise standard, the noise standard applicable to said category shall be increased to reflect the maximum ambient noise level.

E. If the measurement location is on a boundary between two different noise zones, the lower noise level standard applicable to the noise zone shall apply. (Ord. 95-53 § 2, 1995; Ord. 95-38 § 11 (part), 1995)

10.26.035 Exemptions.
..................................................................................................................................................................................................................................................................................................................................

The following activities shall be exempted from the provisions of this chapter:

A. Any activity conducted on public property, or on private properly with the consent of the owner, by any public entity, or its officers, employees, representatives, agents, subcontractors, permittees, licensees, or lessees, which are consistent with, and in furtherance of, the governmental functions or services the public entity has authorized, or responsible, to perform, activities which are exempt from the provisions of this chapter include, without limitation, sporting and recreational activities which are sponsored or co -sponsored by the City of Newport Beach or the Newport Mesa Unified School District;
B. Occasional outdoor gatherings, public dances, show, sporting and entertainment events, provided said events are conducted pursuant to a permit or license issued by the appropriate jurisdiction relative to the staging of said events;
C. Any mechanical device, apparatus or equipment used, related to or connected with emergency machinery, vehicle, work or warning alarm or bell, provided the sounding of any bell or alarm on any building or motor vehicle shall terminate its operation within forty-five (45) minutes in any hour of its being activated; D. Noise sources associated with construction, repair, remodeling, demolition or grading of any real property.

Such activities shall instead be subject to the provisions of Chapter 10.28 of this title; E. Noise sources associated with construction, repair, remodeling, demolition or grading of public rights -of -way or during authorized seismic surveys;
F. All mechanical devices, apparatus or equipment associated with agriculture operations provided that:

1. Operations do not take place between eight p.m. and seven a.m. on weekdays, including Saturday, or at any time Sunday or a federal holiday, or

2. Such operations and equipment are utilized for the protection or salvage of agricultural crops during periods of potential or actual frost damage or other adverse weather conditions, or

3. Such operations and equipment are associated with agricultural pest control through pesticide application, provided the application is made in accordance with permits issued by or regulations enforced (63

by the California Department of Agriculture;
G. Noise sources associated with the maintenance of real property. Such activities shall instead be subject to the provisions of Chapter 10.28 of this title;
H. Any activity to the extent regulation thereof has been preempted by state or federal law. NOTE: Preemption may include motor vehicle, aircraft in flight, and railroad noise regulations; I. Any noise sources associated with people and/or music associated with a party at a residential property. Such noise is difficult to measure under the terms of this chapter and instead shall be subject to the provisions of Chapters 10.28 and 10.58 of this title;
J. Any noise sources associated with barking dogs or other intermittent noises made by animals on any properly within the City of Newport Beach. Such noise is difficult to measure under the terms of this chapter and instead shall be subject to the provisions of Chapter 7.20 of this Code; K. Any noise sources associated with the operation of a permanently installed heating, venting and air conditioning (HVAC) equipment on a residential property permitted under the provisions of Section 10.26.045(B) and (C);
L. Any noise sources specifically identified and mitigated under the provisions of a use permit, modification permit, development agreement or planned community district development plan adopted prior to the date of adoption of this chapter. (Ord. 95-53 § 3, 1995; Ord. 95-38 § 11 (part), 1995)

10.26.040 Schools, Day Care Centers, Churches, Libraries, Museums, Health Care Institutions —Special Provisions.
..................................................................................................................................................................................................................................................................................................................................

It is unlawful for any person to create any noise which causes the noise level at any school, day care center, hospital or similar health care institution, church, library or museum while the same is in use, to exceed the noise standards specified in Section 10.26.025 prescribed for the assigned Noise Zone I (residential uses). (Ord. 95-38 § 11 (part), 1995)

10.26.045 Heating, Venting and Air Conditioning —Special Provisions.

A. New HVAC Equipment. New permits for heating, venting and air conditioning (HVAC) equipment in or adjacent to residential areas shall be issued only where installations can be shown by computation, based on the sound rating of the proposed equipment, not to exceed an A -weighted sound pressure level of fifty (50) DBA or not to exceed an A -weighted sound pressure level of fifty-five (55) dBA and be installed with a timing device that will deactivate the equipment during the hours of ten p.m. to seven a.m. The method of computation used shall be that specified in "Standard Application of Sound Rated Outdoor Unitary Equipment," Standard 275, Air conditioning and Refrigeration Institute, 1984 or latest revision thereof.

B. Existing HVAC Equipment.

1. HVAC equipment legally installed prior to April 22, 1981, shall be permitted to operate with an exterior noise limit of sixty-five (65) dBA until January 1, 1998.

2. HVAC equipment legally installed prior to April 22, 1981, shall be exempted from the interior noise level standard as specified in Section 10.26.030 of this chapter until January 1, 1998.

3. HVAC equipment legally installed after April 22, 1981, and prior to the date of adoption of this chapter shall not exceed a maximum exterior noise limit of fifty-five (55) dBA during the ninety -day compliance period set forth in Section 10.26.005.
(�94

C. In the event that HVAC equipment cannot meet the requirements set forth in this chapter, then the exterior noise limit for such equipment may be raised to sixty-five (65) dBA and exempted from the interior noise level standard as specified in Section 10.26.030 of this chapter, provided that the applicant obtains the written consent of all the owners of the affected properties. (Ord. 95-38 § 11 (part), 1995)

10.26.050 Sound -Amplifying Equipment.
.........................................................................................................................................

Loudspeakers, sound amplifiers, public address systems or similar devices used to amplify sounds shall be subject to the provisions of Chapter 10.32 of this title. Such sound -amplifying equipment shall not be construed to include electronic devices, including but not limited to, radios, tape players, tape recorders, compact disc players, electric keyboards, music synthesizers, record players or televisions, which are designed and operated for personal use, or used entirely within a building and are not designed or used to convey the human voice, music or any other sound to an audience outside such building, or which are used in vehicles and heard only by occupants of the vehicle in which installed, which shall be subject to the provisions of Chapter 10.28 of this title. (Ord. 95-38 § 11 (part), 1995)

10.26.055 Noise Level Measurement.
............................................................................................................................

A. The location selected for measuring exterior noise levels in a residential area shall be at any part of a private yard, patio, deck or balcony normally used for human activity and identified by the owner of the affected property as suspected of exceeding the noise level standard. This location may be the closest point in the private yard or patio, or on the deck or balcony, to the noise source, but should not be located in nonhuman activity areas such as trash container storage areas, planter beds, above or contacting a property line fence, or other areas not normally used as part of the yard, patio, deck or balcony. The location selected for measuring exterior noise levels in a nonresidential area shall be at the closest point to the noise source. The measurement microphone height shall be five feet above finish elevation or, in the case of a deck or balcony, the measurement microphone height shall be five feet above the finished floor level.

B. The location selected for measuring interior noise levels shall be made within the affected residential unit.

The measurements shall be made at a point at least four feet from the wall, ceiling or floor, or within the frame of a window opening, nearest the noise source. The measurements shall be made with windows in an open position. (Ord. 95-38 § 11 (part), 1995)

10.26.065 Proposed Developments.
........................................................................................................................

Each department whose duty it is to review and approve new projects or changes to existing projects that result or may result in the creation of noise shall consult with the Code Enforcement Officer prior to any such approval.

If at any time the Code Enforcement Officer has reason to believe that a standard, regulation, action, proposed standard, regulation or action of any department respecting noise does not conform to the provisions as specified in this chapter, the Code Enforcement Officer may request such department to consult with him on the advisability of revising such standard or regulation to obtain uniformity. (Ord. 95-38 § 11 (part), 1995)

10.26.070 Prima Facie Violation.

Any noise exceeding the noise level standard as specified in Section 10.26.025 and 10.26.030 of this chapter, shall be deemed to be prima facie evidence of a violation of the provisions of this chapter. (Ord. 95-38 § 11 (part), 1995)

10.26.075 Violations.
...........................................................................

Any persons violating any of the provisions of this chapter shall be deemed guilty of an infraction. (Ord. 95-38 § 11 (part), 1995)
( 65

10.26.080 Violations —Additional Remedies —Injunctions.

A. As an additional remedy, the operation or maintenance of any device, instrument, vehicle or machinery in violation of any provisions of this chapter which operation or maintenance causes or creates sound levels exceeding the allowable standards as specified in this chapter shall be deemed and is declared to be a public nuisance and may be subject to abatement summarily by a restraining order or injunction issued by a court of competent jurisdiction.

B. Any violation of this chapter is declared to be a public nuisance and may be abated in accordance with law.

The expense of this chapter is declared to be public nuisance and may be by resolution of the City Council declared to be a lien against the property on which such nuisance is maintained, and such lien shall be made a personal obligation of the property owner. (Ord. 95-38 § 11 (part), 1995)

10.26.085 City Manager Waiver.

The City Manager is authorized to grant a temporary waiver to the provisions of this chapter for a period of time not to exceed thirty (30) days if such temporary waiver would be in the public interest and there is no feasible and prudent alternative to the activity, or the method of conducting the activity, for which the temporary waiver is sought. (Ord. 95-38 § 11 (part), 1995)

10.26.090 Noise Abatement Programs.

A. In circumstances which adopted community -wide noise standards and policies prove impractical in controlling noise generated from a specific source, the City Council may establish a noise abatement program which recognizes the characteristics of the noise source and affected property and which incorporates specialized mitigation measures.

B. Noise abatement programs shall set forth in detail the approved terms, conditions and requirements for achieving maximum compliance with noise standards and policies. Said terms, conditions and requirements may include, but shall not be limited to, limitations, restrictions, or prohibitions on operating hours, location of operations, and the types of equipment. (Ord. 95-38 § 11 (part), 1995)

10.26.095 Manner of Enforcement.
.........................................................................................................................................................................................................................................................................................................................

A. The City Code Enforcement Officer is directed to enforce the provisions of this chapter and may issue citations for any violation of the provisions of this chapter or violations of this chapter may be prosecuted or enforced in the same manner as other infractions pursuant to this Code; provided, however, that in the event of an initial violation of the provisions of this chapter, a written notice may be given to the alleged violator which specifies the time by which the condition shall be corrected.

B. No person shall interfere with, oppose or resist any authorized person charged with the enforcement of this chapter while such person is engaged in the performance of his/her duty.

C. In the event the alleged violator cannot be located in order to serve any notice, the notice shall be deemed to be given upon mailing such notice by registered or certified mail to the alleged violator at his last known address or at the place where the violation occurred in which event the specified time period for abating the violation or applying for a variance shall commence at the date of the day following the mailing of such notice. (Ord. 95-38 § 11 (part), 1995)

10.26.100 Severability.
..................................................................................................................................................................................................................................................................................................................................

If any provision, clause, sentence, or paragraph of this chapter, or the application thereof to any person or circumstance shall be held invalid, such invalidity shall not affect the other provisions of this chapter which can be

1401 Quail Street Residential Apartments Noise Impact Analysis APPENDIX 3.2:

CITY OF NEWPORT BEACH MUNICIPAL CODE CHAPTER 10.28
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Chapter 10.28
LOUD AND UNREASONABLE NOISE*
Sections:

10.28.005 Policy.

10.28.007 Loud and Unreasonable Noise is Prohibited.

10.28.010 Loud and Unreasonable Noise.

10.28.020 Loud and Raucous Noise from Sound -Making or Amplifying Devices Prohibited.

10.28.040 Construction Activity —Noise Regulations.

10.28.045 Real Property Maintenance —Noise Regulations.

10.28.050 Exceptions.

Sound -amplifying equipment —See Chapter 10.32.

Prior history: 1949 Code § 4208; Ords. 1191, 1802, 87-11, 87-17 and 93-7.

10.28.005 Policy.
..................................................................................................

It is found and declared as follows:

A. The making, allowing, creation or maintenance of loud and unreasonable, unnecessary, or unusual noises which are prolonged, unusual, annoying, disturbing and/or unreasonable in their time, place and use are a detriment to public health, comfort, convenience, safety, general welfare and the peace and quiet of the City and its inhabitants.

B. The necessity in the public interest for the provisions and prohibitions contained and enacted is to declare as a matter of legislative determination and public policy, and it is further declared that the provisions and prohibitions contained and enacted are in pursuance of and for the purpose of securing and promoting the public health, comfort, convenience, safety, general welfare and property and the peace and quiet of the City and its inhabitants. (Ord. 2001-4 § 1, 2001)

10.28.007 Loud and Unreasonable Noise is Prohibited.
...............................................................................................................................................................................................................................................................................................................................

It is unlawful for any person or property owner to make, continue, cause or allow to be made any loud, unreasonable, unusual, penetrating or boisterous noise, disturbance or commotion which annoys, disturbs, injures or endangers the comfort, repose, health, peace and quiet within the limits of the City, and the acts and things listed in this chapter, among others, are declared to be loud, disturbing, injurious and unreasonable noises in violation of this Chapter, but shall not be deemed to be exclusive. (Ord. 2001-4 § 2, 2001)

10.28.010 Loud and Unreasonable Noise.

It is unlawful for any person or property owner to willfully make, allow, continue or cause to be made, allowed, or continued, any loud and unreasonable, unnecessary, or disturbing noise, including, but not limited to, yelling, shouting, hooting, whistling, singing, playing music, or playing a musical instrument, which disturbs the peace, comfort, quiet or repose of any area or which causes discomfort or annoyance to any reasonable person of normal sensitivities in the area, after a peace or code enforcement officer has first requested that the person or property owner cease and desist from making or continuing, or causing to make or continue, such loud, unreasonable, unnecessary, excessive or disturbing noise.

The factors, standards, and conditions which should be considered in determining whether a violation of the provisions of this section has been committed, include, but are not limited to, the following:

A. The level of the noise;

B. Whether the nature of the noise is usual or unusual; C. Whether the origin of the noise is natural or unnatural; D. The level and intensity of the background (ambient) noise, if any; E. The proximity of the noise to residential or commercial sleeping areas; F. The nature and zoning of the area within which the noise emanates; G. The density of inhabitation of the area within which the noise emanates; H. The time of day and night the noise occurs;
I. The duration of the noise;
J. Whether the noise is constant, or recurrent or intermittent; and K. Whether the noise is produced by a commercial or noncommercial activity; L. If the noise is produced by a commercial activity, whether the use is lawful under the provisions of Title 20 of this Code and whether the noise is one that could reasonably be expected from the commercial activity.

M. Penalties. Any person who violates any provision of this section is guilty of a misdemeanor, unless the violation is deemed an infraction pursuant to the provisions of Section 1.04.010 of this Code. (Ord. 2001-4 § 3 (part), 2001: Ord. 95-38 § 3 (part), 1995)

10.28.020 Loud and Raucous Noise from Sound -Making or Amplifying Devices Prohibited. ..................................................................................................................................................................................................................................................................................................................................

A. It is unlawful for any person to cause, allow or permit the emission or transmission of any loud or raucous noise from any sound -making or sound -amplifying device in his possession or under his control:

1. Upon any private property; or

2. Upon any public street, alley, sidewalk or thoroughfare; or

3. In or upon any public park, beach or other public place or property.

B. The words "loud and raucous noise," as used herein, shall mean any sound or any recording thereof when amplified or increased by any electrical, mechanical or other device to such volume, intensity or carrying power as to unreasonably interfere with the peace and quiet of other persons within or upon any one or more of such places or areas, or as to unreasonably annoy, disturb, impair or endanger the comfort, repose, health, or safety of other persons within or upon any one or more such places or areas.

C. The word "unreasonably," as used herein, shall include, but not be limited to, consideration of the hour, place, nature and circumstances of the emission or transmission of any such loud and raucous noise.

D. Penalties. Any person who violates any provision of this section is guilty of a misdemeanor unless the violation is deemed an infraction pursuant to the provisions of Section 1.04.010 of this Code. (Ord. 2001-4 § 3 (part), 2001: Ord. 95-38 § 3 (part), 1995)

10.28.040 Construction Activity —Noise Regulations.
..................................................................................................................................................................................................................................................................................................................................

noise that disturbs, or could disturb, a person of normal sensitivity who works or resides in the vicinity, unless authorized to do so in accordance with subsection (B) of this section.

B. The provisions of subsection (A) of this section shall not apply to the following:

1. Work performed on any weekday, which is not a federal holiday, between the hours of 7:00 a.m. and 6:30 p.m.

2. Work performed on a Saturday, in any area of the City that is not designated as a high -density area, between the hours of 8:00 a.m. and 6:00 p.m.

3. Emergency work performed pursuant to written authorization of the Community Development Director, or his or her designee.

4. Maintenance, repair or improvement of any public work or facility by public employees, by any person or persons acting pursuant to a public works contract, or by any person or persons performing such work or pursuant to the direction of, or on behalf of, any public agency; provided, however, this exception shall not apply to the City of Newport Beach, or its employees, contractors or agents, unless:
a. The City Manager or department director determines that the maintenance, repair or improvement is immediately necessary to maintain public services;
b. The maintenance, repair or improvement is of a nature that cannot feasibly be conducted during normal business hours; or
c. The City Council has approved project specifications, contract provisions, or an environmental document that specifically authorizes construction during hours of the day which would otherwise be prohibited pursuant to this section.

C. No landowner, construction company owner, contractor, subcontractor, or employer shall permit or allow any person or persons working under their direction and control to operate any tool, equipment or machine in violation of the provisions of this section.

D. Any person who violates any provision of this section is guilty of a misdemeanor unless the violation is deemed an infraction pursuant to the provisions of Section 1.04.010, or any successor section, of this Code.

E. Designated High -Density Area. The term "designated high -density area" shall mean any shaded area on the following map. See Exhibit A*. The geographical boundaries of a homeowners' association, as defined in subsection (F) of this section, shall be excluded from the definition of a "designated high -density area" if the City Council adopts a resolution pursuant to subsection (F) of this section.

F. A homeowners' association located within a designated high -density area may exclude the geographical boundaries of the homeowners' association from the definition of a designated high -density area if:

1. The board of directors of the homeowners' association votes to approve a resolution or letter declaring its desire to exempt its geographical boundaries from the definition of a designated high -density area;

2. The board of directors submits the approved resolution or letter to the City Clerk for consideration by the City Council; and

3. The City Council adopts a resolution finding that exempting the geographical boundaries of the homeowners' association from the definition of a designated high -density area will not negatively affect surrounding property owners.

For the purpose of this subsection, a "homeowners' association" means an organization consisting of at least thirty (30) voting members whose properties connect in a contiguous manner and whose operation is governed by a board of directors. (Ord. 2019-11 §§ 1, 2, 2019; Ord. 2019-9 § 1, 2019: Ord. 2013-11 § 35, 2013; Ord. 2001-4 § 3 (part), 2001: Ord. 95-38 § 3 (part), 1995)
"Exhibit A is on file in the City Clerk's office.

10.28.045 Real Property Maintenance —Noise Regulations.

A. Weekdays and Saturdays. No person shall, while engaged in maintenance of real property, operate any tool, equipment or machine in a manner which produces loud noise that disturbs, or could disturb, a person of normal sensitivity who works or resides in the vicinity, except between the hours of seven a.m. and six -thirty p.m., Monday through Friday, nor on any Saturday, except between the hours of eight a.m. and six p.m.

B. Sundays and Holidays. No person shall, while engaged in maintenance of real property, operate any tool, equipment or machine in a manner which produces loud noise that disturbs, or could disturb, a person of normal sensitivity who works or resides in the vicinity, on any Sunday or any federal holiday.

C. No landowner, gardener, property maintenance service, contractor, subcontractor or employer shall permit or allow any person or persons working under their direction and control to operate any tool, equipment or machine in violation of the provisions of this section.

D. After January 1, 1996, mechanical blowers, as defined in Section 6.04.055, shall not be operated at a noise level that exceeds an A -weighted sound pressure level of seventy (70) dBA, as measured at a distance of fifty (50) feet. After January 1, 1999, such equipment shall not be operated at a noise level that exceeds an A - weighted sound pressure level of sixty-five (65) dBA, as measured from a distance of fifty (50) feet.

E. Exceptions. The provisions of this section shall not apply to the following:

1. Emergency property maintenance authorized by the Community Development Director, or his or her designee;

2. The maintenance, repair or improvement of any public work or facility by public employees, by any person or persons acting pursuant to a public works contract, or by any person or persons performing such work or pursuant to the direction of, or on behalf of, any public agency; provided, however, this exception shall not apply to the City of Newport Beach, or its employees, contractors or agents, unless:
a. The City Manager or department director determines that the maintenance, repair or improvement is immediately necessary to maintain public service,
b. The maintenance, repair or improvement is of a nature that cannot feasibly be conducted during normal business hours,
c. The City Council has approved project specifications, contract provisions, or an environmental document that specifically authorizes construction during hours of the day which would otherwise be prohibited pursuant to this section;

3. Greens maintenance on golf courses conducted between the hours of six a.m. and eight p.m. and all other types of golf course maintenance between the hours of seven a.m. and eight p.m., provided no maintenance activity commences before six a.m.

F. Penalties. Any person who violates any provision of this section is guilty of a misdemeanor unless the violation is deemed an infraction pursuant to the provisions of Section 1.04.010 of this Code. (Ord. 2019-9 § 2, 2019; Ord. 2001-4 § 3 (part), 2001: Ord. 95-38 § 3 (part), 1995) ��2

1401 Quail Street Residential Apartments Noise Impact Analysis APPENDIX 7.1:

OPERATIONAL NOISE LEVEL CALCULATIONS
15418-06 Noise_Study.docx
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15418-06 Noise_Study.docx
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15418 - 1401 Quail Street
CadnaA Noise Prediction Model- 15418-020peration.cna
Date: 18.06.23
Analyst: B. Maddux
Calculation Configuration
Configuration
Parameter
Value
General
Max. Error (dB)

0.00 Max. Search Radius (#(Unit,LEN))
2000.01
Min. Dist Src to Rcvr

0.00 Partition
Raster Factor

0.50 Max. Length of Section (#(Unit,LEN))
999.99
Min. Length of Section (#(Unit,LEN))

1.01 Min. Length of Section (%)

0.00 Proj. Line Sources
On
Proj. Area Sources
On
Ref. Time
Daytime Penalty (dB)

0.00 Rear. Time Penalty (dB)

5.00 Night-time Penalty (dB)

10.00 DTM
Standard Height (m)

0.00 Model of Terrain
Triangulation
Reflection
max. Order of Reflection
2 Search Radius Src
100.00
Search Radius Rcvr
100.00
Max. Distance Source -Rcvr
1000.001000.00
Min. Distance Rvcr - Reflector

1.001.00
Min. Distance Source - Reflector

0.10 Industrial (ISO 9613)
Lateral Diffraction
some Obj
Obst. within Area Src do not shield
On
Screening
Incl. Ground Att. over Barrier
Dz with limit (20/2S)
Barrier Coefficients C1,2,3

3.0 20.0 0.0
Temperature (#(Unit,TEMP))
10 rel. Humidity(%)
70 Ground Absorption G

0.5o
Wind Speed for Dir. (#(Unit,SPEED))

3.0 Roads (TNM)
Railways(FTA/FRA)
Aircraft (???)
Strictly acc. to AzB
Receiver Noise Levels
Name
M.

ID
Level Lr
Limit. Value
Land Use
Height
Coordinates
Day
Night
CNEL
Day
Night
CNEL
Type
Auto
Noise Type
X
y
2 (dBA)
(dBA)
(dBA)
(dBA)
(dBA)
(dBA)
(ft)
(ft)
(ft)
(ft)
R1
R1

36.1 31.5

38.6 0.0

0.0 0.0
x
Total

5.00 r 6069408.52
2187818.22

5.00 R2
R2

57.2 35.2

54.4 0.0

0.0 0.0
x
Total

5.00 r 6069020.30
2187524.66

5.00 R3
R3

38.7 23.5

36.6 0.0

0.0 0.0
x
Total

5.00 r 6068211.67
2187042.22

5.00 R4
R4

38.7 29.8

38.6 0.0

0.0 0.0
x
Total

5.00 r 6069046.70
2187811.88

5.00 Point Source(s)
Name
M.

ID
Result. PWL
Lw/Li
Operating Time
Height
Coordinates
Day
Evening
Night
Type
Value
norm.

Day
Special
Night
X
y
2 (dBA)
(dBA)
(dBA)
dB(A)
(min)
(min)
(min)
(ft)
(ft)
(ft)
(ft)
A0001
A0001

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069175.55
2187645.58

67.50 AC002
AC002

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069116.20
2187696.58

67.50 A0003
A0003

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069184.99
2187613.01

67.50 AC004
AC004

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069123.45
2187740.85

67.50 A0005
A0005

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069155.35
2187777.63

67.50 AC006
AC006

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069184.10
2187811.60

67.50 A0007
A0007

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069166.85
2187791.20

67.50 AC008
AC008

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069143.74
2187764.29

67.50 A0009
A0009

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069187.14
2187814.85

67.50 AC010
AC010

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069120.52
2187737.48

67.50 AC011
AC011

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069137.88
2187757.67

67.50 AC012
AC012

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069152.20
2187774.16

67.50 AC013
AC013

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069126.27
2187744.32

67.50 AC014
AC014

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069135.06
2187754.09

67.50 AC015
AC015

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6669106.091
2187720.67

67.50 AC016
AC016

75.0 75.0

75.0 Lw
1 75
1 1 675.001

0.001
275.001

3.001
g 1 6069181.281
2187808.23

67.50 Urban Crossroads, Inc. (�-95

Name
M.

ID
Result. PWL
Lw/Li
Operating Time
Height
Coordinates
Day
Evening
Night
Type
Value
norm.

Day
Special
Night
X
y
2 (dBA)
(dBA)
(dBA)
dB(A)
(min)
(min)
(min)
(ft)
(ft)
(ft)
(ft)
AC017
AC017

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069094.69
2187706.89

67.50 AC018
AC018

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069189.96
2187818.32

67.50 AC019
AC019

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069117.59
2187734.01

67.50 ACO20
ACO20

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069161.21
2187784.69

67.50 ACO21
ACO21

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069140.70
2187761.03

67.50 ACO22
ACO22

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069129.20
2187747.36

67.50 ACO23
ACO23

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069114.77
2187730.65

67.50 ACO24
ACO24

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069195.71
2187824.83

67.50 ACO25
ACO25

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069109.12
2187723.92

67.50 ACO26
ACO26

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069169.67
2187794.56

67.50 ACO27
ACO27

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069091.65
2187703.74

67.50 ACO28
ACO28

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069198.64
2187828.20

67.50 ACO29
ACO29

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069178.35
2187804.76

67.50 AC030
AC030

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069163.92
2187787.72

67.50 AC031
AC031

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069193.00
2187821.47

67.50 AC032
AC032

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069158.06
2187781.10

67.50 AC033
AC033

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069149.60
2187771.12

67.50 AC034
AC034

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069172.71
2187798.14

67.50 AC035
AC035

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069132.34
2187750.83

67.50 AC036
AC036

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069103.48
2187716.98

67.50 AC037
AC037

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069201.57
2187831.56

67.50 AC038
AC038

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069146.67
2187767.76

67.50 AC039
AC039

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069175.42
2187801.29

67.50 AC040
AC040

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069086.12
2187696.90

67.50 AC041
AC041

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069088.83
2187700.16

67.50 AC042
AC042

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069111.94
2187727.18

67.50 AC043
AC043

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069204.70
2187834.97

67.50 AC044
AC044

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069296.88
2187751.27

67.50 AC045
AC045

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069256.52
2187704.39

67.50 AC046
AC046

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069247.51
2187693.87

67.50 AC047
AC047

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069250.66
2187697.34

67.50 AC048
AC048

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069291.02
2187744.54

67.50 AC049
AC049

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069212.90
2187653.72

67.50 AC050
AC050

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069233.19
2187677.37

67.50 AC051
AC051

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069236.01
2187680.74

67.50 AC052
AC052

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069268.02
2187717.85

67.50 AC053
AC053

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069207.26
2187646.88

67.50 AC054
AC054

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069215.83
2187657.19

67.50 AC055
AC055

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069293.95
2187747.90

67.50 AC056
AC056

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069253.37
2187700.81

67.50 AC057
AC057

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069210.08
2187650.35

67.50 AC058
AC058

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069285.27
2187738.03

67.50 AC059
AC059

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069204.44
2187643.63

67.50 AC060
AC060

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069282.45
2187734.56

67.50 AC061
AC061

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069181.43
2187616.61

67.50 AC062
AC062

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069276.59
2187727.94

67.50 AC063
AC063

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069259.23
2187707.43

67.50 AC064
AC064

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069186.97
2187623.44

67.50 AC065
AC065

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069262.16
2187710.90

67.50 AC066
AC066

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069273.66
2187724.46

67.50 AC067
AC067

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069198.79
2187636.68

67.50 AC068
AC068

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069184.15
2187619.86

67.50 AC069
AC069

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069244.91
2187690.83

67.50 AC070
AC070

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069221.58
2187664.03

67.50 AC071
AC071

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069227.66
2187670.54

67.50 AC072
AC072

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069218.76
2187660.55

67.50 AC073
AC073

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069224.51
2187667.06

67.50 AC074
AC074

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069288.31
2187741.17

67.50 AC075
AC075

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069190.00
2187626.59

67.50 AC076
AC076

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069239.05
2187683.99

67.50 AC077
AC077

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069201.40
2187640.37

67.50 AC078
AC078

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069270.73
2187720.99

67.50 AC079
AC079

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069264.98
2187714.26

67.50 AC080
ACOSO

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069279.41
2187731.30

67.50 AC081
AC081

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069241.98
2187687.46

67.50 ACO82
ACO82

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069230.37
2187673.79

67.50 AC083
AC083

75.0 75.0

75.0 Lw
75 675.00

0.00 275.00

3.00 g 6069299.37
2187754.44

67.50 Pooll
Pooll

80.3 80.3

80.3 Lw

80.3 900.00

0.00 0.00

5.00 g 6069158.45
2187686.49

26.00 Poo12
Poo12

80.3 80.3

80.3 Lw

80.3 900.00

0.00 0.00

5.00 g 6069187.96
2187720.87

26.00 Outdoorl
Outdoorl

94.5 94.5

94.5 Lw

94.5 900.00

0.00 0.00

5.00 g 6069215.22
2187752.29

26.00 Outdoor2
Outdoor2

94.5 94.5

94.5 Lw

94.5 900.00

0.00 0.00

5.00 g 6069167.13
2187717.92

26.00 Outdoor3
Outdoor3

94.5 94.5

94.5 Lw

94.5 900.00

0.00 0.00

5.00 g 6069189.87
2187698.99

26.00 Outdoor4
Outdoor4

94.5 94.5

94.5 Lw

94.5 900.00

0.00 0.00

5.00 g 6069207.75
2187725.03

26.00 Outdoors
Outdoors

94.5 94.5

94.5 Lw

94.5 900.00

0.00 0.00

5.00 g 6069188.83
2187740.66

26.00 Outdoor6
Outdoor6

94.5 94.5

94.5 Lw

94.5 900.00

0.00 0.00

5.00 r 6069148.19
2187612.80

5.00 Outdoor7
Outdoor7

94.5 94.5

94.5 Lw

94.5 900.00

0.00 0.00

5.00 r 6069133.00
2187625.90

5.00 Outdoor8
Outdoor8

94.5 94.5

94.5 Lw

94.5 900.00

0.00 0.00

5.00 r 6069114.68
2187607.33

5.00 Urban Crossroads, Inc. G 96

Name
M.

ID
Result. PWL
Lw/Li
Operating Time
Height
Coordinates
Day
Evening
Night
Type
Value
norm.

Day
Special
Night
X
y
z
(dBA)
(dBA)
(dBA)
dB(A)
(min)
(min)
(min)
(ft)
(ft)
(ft)
(ft)
Outdoor9
Outdoor9

94.5 94.5

94.5 Lw

94.5 900.00

0.00 0.001

5.00 r 6069132.48
1 2187591.53

5.00 Parkingl
Parkingl

76.3 76.3

76.3 Lw

76.3 900.00

0.00 540.001

5.00 r 6069131.43
2187561.46

5.00 Line
Name I M.I ID Result. PWL Result. PWL' Lw / Li Operating Time Moving It. Src Height Dav Evening Night Dav Evening Night Tvoe Value norm. Dav Special Night Number Soeed I I I (dBA) I (dBA) (dBA) I (dBA) (dBA) I (dBA) dB(A) I (min) I (min) I (min) I Day I Evening I Night I (mph) I (ft) NamelID1 Height I Coordinates
Begin End x y z Ground
(ft) (ft) (ft) (ft) (ft) (ft)
Area Source(s)
Name M. ID Result.PWL Result.PW"' Lw/Li Operating Time Height Day Evening Night Day Evening Night Type Value norm. Day Special Night (ft) (dBA) I (dBA) (dBA) I (dBA) (dBA) I (dBA) dB(A) I (min) I (min) (min) NamelID1 Height I Coordinates
Begin End x y z Ground
(ft) (ft) (ft) (ft) (ft) (ft)
I Name I Sel. I M. I ID I Absorption I Z-Ext. I Cantilever I Height I Coordinates sett 1 ngnt norz. vert. Begin tna x y z erouna
(ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft) (ft)
Buildinels)
Name
Sel.

ID
RB
Residents
Absorption
Height
Coordinates
Begin
x
y
z
Ground
(ft)
(ft)
(ft)
(ft)
(ft)

BUILDING
BUILDING00001
x
0 21.00
a 6069176.60
2187874.04

21.00 0.00
6069217.54
2187838.27

21.00 0.00
6069218.23
2187839.04

21.00 0.00
6069235.52
2187824.45

21.00 0.00
6069234.90
2187823.55

21.00 0.00
6069247.75
2187812.79

21.00 0.00
6069249.27
2187814.52

21.00 0.00
6069271.67
2187795.37

21.00 0.00
6069269.74
2187793.08

21.00 0.00
6069274.79
2187788.70

21.00 0.00
6069275.21
2187789.28

21.00 0.00
6069283.23
2187782.66

21.00 0.00
6069283.70
2187783.24

21.00 0.00
6069301.04
2187768.44

21.00 0.00
6069300.11
2187767.14

21.00 0.00
6069309.38
2187759.28

21.00 0.00
6069306.88
2187756.20

21.00 0.00
6069338.78
2187728.77

21.00 0.00
6069316.67
2187702.93

21.00 0.00
6069315.70
2187703.81

21.00 0.00
6069274.94
2187656.47

21.00 0.00
6069275.72
2187655.89

21.00 0.00
6069236.56
2187610.36

21.00 0.00
6069235.80
2187611.09

21.00 0.00
6069180.62
2187546.05

21.00 0.00
6069169.93
2187555.08

21.00 0.00
6069171.54
2187557.01

21.00 0.00
6069141.65
2187582.22

21.00 0.00
6069169.56
2187614.81

21.00 0.00
6069148.33
2187632.95

21.00 0.00
6069146.16
2187630.35

21.00 0.00
6069138.26
2187637.12

21.00 0.00
6069131.36
2187629.18

21.00 0.00
6069123.07
2187636.30

21.00 0.00
6069117.99
2187630.22

21.00 0.00
6069109.44
2187637.34

21.00 0.00
6069114.74
2187643.33

21.00 0.00
6069106.29
2187650.41

21.00 0.00
6069113.37
2187658.39

21.00 0.00
6069105.29
2187665.03

21.00 0.00
6069107.51
2187667.73

21.00 0.00
6069081.20
2187689.88

21.00 0.00
6069080.16
2187688.58

21.00 0.00
Urban Crossroads, Inc. G�7

Name
Sel.

ID
RB
Residents
Absorption
Height
Coordinates
Begin
x
y
z
Ground
(ft)
(ft)
(ft)
(ft)
(ft)
6069053.94
2187710.80

21.00 0.00
6069054.62
2187711.61

21.00 0.00
6069045.56
2187719.34

21.00 0.00
6069088.44
2187770.01

21.00 0.00
6069087.71
2187770.66

21.00 0.00
6069104.22
2187789.98

21.00 0.00
6069104.97
2187789.36

21.00 0.00
6069121.49
2187808.84

21.00 0.00
6069120.88
2187809.36

21.00 0.00
6069137.41
2187828.57

21.00 0.00
6069162.09
2187857.43

21.00 0.00

BUILDING
BUILDING00002
x
0 43.50
g 6069182.54
2187866.88

64.50 0.00
6069220.08
2187835.25

64.50 0.00
6069213.48
2187827.34

64.50 0.00
6069224.80
2187817.75

64.50 0.00
6069231.33
2187825.74

64.50 0.00
6069247.75
2187812.79

64.50 0.00
6069249.27
2187814.52

64.50 0.00
6069271.67
2187795.37

64.50 0.00
6069269.74
2187793.08

64.50 0.00
6069285.62
2187779.52

64.50 0.00
6069279.02
2187771.54

64.50 0.00
6069290.31
2187761.99

64.50 0.00
6069296.73
2187769.80

64.50 0.00
6069309.38
2187759.28

64.50 0.00
6069305.76
2187755.74

64.50 0.00
6069327.37
2187737.34

64.50 0.00
6069307.23
2187713.90

64.50 0.00
6069316.35
2187706.43

64.50 0.00
6069273.99
2187657.30

64.50 0.00
6069265.92
2187664.07

64.50 0.00
6069226.94
2187618.50

64.50 0.00
6069234.93
2187611.64

64.50 0.00
6069195.00
2187565.29

64.50 0.00
6069155.75
2187598.69

64.50 0.00
6069169.56
2187614.81

64.50 0.00
6069143.09
2187637.60

64.50 0.00
6069159.40
2187656.43

64.50 0.00
6069161.84
2187654.35

64.50 0.00
6069169.04
2187662.77

64.50 0.00
6069174.68
2187658.08

64.50 0.00
6069189.53
2187675.36

64.50 0.00
6069184.40
2187679.70

64.50 0.00
6069208.45
2187707.65

64.50 0.00
6069213.31
2187703.74

64.50 0.00
6069228.50
2187721.36

64.50 0.00
6069222.17
2187726.75

64.50 0.00
6069244.91
2187753.48

64.50 0.00
6069239.87
2187758.08

64.50 0.00
6069246.38
2187765.72

64.50 0.00
6069223.64
2187784.91

64.50 0.00
6069217.04
2187777.61

64.50 0.00
6069212.01
2187781.69

64.50 0.00
6069188.66
2187755.30

64.50 0.00
6069182.50
2187760.34

64.50 0.00
6069167.48
2187742.63

64.50 0.00
6069172.34
2187738.38

64.50 0.00
6069148.29
2187710.51

64.50 0.00
6069143.17
2187714.68

64.50 0.00
6069128.33
2187697.23

64.50 0.00
6069134.06
2187692.72

64.50 0.00
6069126.42
2187683.78

64.50 0.00
6069128.94
2187681.95

64.50 0.00
6069112.96
2187663.29

64.50 0.00
6069082.16
2187689.08

64.50 0.00
6069082.57
2187689.49

64.50 0.00
6069077.43
2187693.86

64.50 0.00
6069082.64
2187700.04

64.50 0.00
6069064.76
2187715.46

64.50 0.00
6069059.62
2187708.93

64.50 0.00
6069049.93
2187717.13

64.50 0.00
6069049.22
2187716.22

64.50 0.00
6069045.56
2187719.34

64.50 0.00
6069089.97
2187770.79

64.50 0.00
6069094.55
2187767.20

64.501

0.00 6069108.93
2187783.87

64.50 0.00
6069104.45
2187787.88

64.50 0.00
Urban Crossroads, Inc. IS /$

Name
Sel.

ID
RB
Residents
Absorption
Height
Coordinates
Begin
x
y
z
Ground
(ft)
(ft)
(ft)
(ft)
(ft)
6069122.99
2187809.39

64.50 0.00
6069127.57
2187805.48

64.50 0.00
6069142.52
2187822.83

64.50 0.00
6069138.04
2187826.52

64.50 0.00
6069164.84
2187858.03

64.50 0.00
6069170.67
2187852.87

64.50 0.00
Ground Absorption(s)
NamelSel.11M.11DI G I Coordinates
x y
(ft) (ft)
Urban Crossroads, Inc. (j-/g

1401 Quail Street Residential Apartments Noise Impact Analysis APPENDIX 8.1:

CONSTRUCTION NOISE LEVEL CALCULATIONS
15418-06 Noise_Study.docx
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15418-06 Noise_Study.docx
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15418 - 1401 Quail Street
CadnaA Noise Prediction Model: 15418-O2_Construction.cna Date: 18.06.23
Analyst: B. Maddux
Calculation Configuration
Configuration
Parameter
Value
General
Max. Error (dB)

0.00 Max. Search Radius (#(Unit,LEN))
2000.01
Min. Dist Src to Rcvr

0.00 Partition
Raster Factor

0.50 Max. Length of Section (#(Unit,LEN))
999.99
Min. Length of Section (#(Unit,LEN))

1.01 Min. Length of Section (%)

0.00 Proj. Line Sources
On
Proj. Area Sources
On
Ref. Time
Daytime Penalty (dB)

0.00 Rear. Time Penalty (dB)

5.00 Night-time Penalty (dB)

10.00 DTM
Standard Height (m)

0.00 Model of Terrain
Triangulation
Reflection
max. Order of Reflection
2 Search Radius Src
100.00
Search Radius Rcvr
100.00
Max. Distance Source -Rcvr
1000.001000.00
Min. Distance Rvcr - Reflector

1.001.00
Min. Distance Source - Reflector

0.10 Industrial (ISO 9613)
Lateral Diffraction
some Obj
Obst. within Area Src do not shield
On
Screening
Incl. Ground Att. over Barrier
Dz with limit (20/25)
Barrier Coefficients C1,2,3

3.0 20.0 0.0
Temperature (#(Unit,TEMP))
10 rel. Humidity(%)
70 Ground Absorption G

0.50 Wind Speed for Dir. (#(Unit,SPEED))

3.0 Roads (TNM)
Railways(FTA/FRA)
Aircraft (???)
Strictly acc. to AzB
Receiver Noise Levels
Name
M.

ID
Level Lr
Limit. Value
Land Use
Height
Coordinates
Day
Night
CNEL
Day
Night
CNEL
Type
Auto
Noise Type
X
Y
2 (dBA)
(dBA)
(dBA)
(dBA)
(dBA)
(dBA)
(ft)
(ft)
(ft)
(ft)
Rl
R1

66.9 -33.1

63.9 0.0

0.0 0.0
x
Total

5.00 r 6069408.52
2187818.22

5.00 R2
R2

70.3 -29.7

67.3 0.0

0.0 0.0
x
Total

5.00 r 6069020.30
2187524.66

5.00 R3
R3

53.1 -46.9

50.1 0.0

0.0 0.0
x
Total

5.00 r 6068211.67
2187042.22

5.00 R4
R4

71.5 -28.5

68.5 0.0

0.0 0.0
x
Total

5.00 r 6069046.70
2187811.88

5.00 Point Source(s)
Name
M.

ID Result.PWL
Lw/Li
Operating Time
Height
Coordinates
Day
Evening
Night
Type
Value norm.

Day
Special
Night
X
Y
2 (dBA) I (dBA) I (dBA) dB(A)
(min) I (min) I (min)
(ft) (ft)
(ft) (ft)
Line Source(s)
NamelM.11DI
Result. PWL
I Result. PWL'
Lw/Li
Operating Time
Moving Pt. Src
Height
Day
I Evening
I Night
I Day
I Evening
I Night
I Type
I Value I
norm. I
Day
I Special
I Night
Number
Speed
I I I (dBA) I (dBA) (dBA) I (dBA) (dBA) I (dBA) dB(A) I (min) I (min) I (min) I Day I Evening I Night I (mph) I (ft) NamejlDj Height Coordinates
Begin End x y z Ground
(ft) (ft) (ft) (ft) (ft) (ft)
Area Source(s)
Urban Crossroads, Inc. G R2

Name
M.

ID
Result. PWL
Result. PWL"
Lw/Li
Operating Time
Height
Day
Evening
Night
Day
Evening
Night
Type
Value
norm.

Day
Special
Night
(ft)
(dBA)
(dBA)
(dBA)
(dBA)
(dBA)
(dBA)
dB(A)
(min)
(min)
(min)

SITEBOUNDARY
SITEBOUNDARY00001
116.0

16.0 16.0

77.6 -22.4
-22.4
PWL-Pt
116.
8 a
Name
ID
Height
Coordinates
Begin
End
x
y
z
Ground
(ft)
(ft)
(ft)
(ft)
(ft)
(ft)

SITEBOUNDARY
SITEBOUNDARY00001

8.00 a
6069148.34
2187494.04

8.00 0.00
6068968.52
2187645.35

8.00 0.00
6069175.82
2187886.90

8.00 0.00
6069342.75
2187743.60

8.00 0.00
6069346.06
2187739.58

8.00 0.00
6069347.14
2187737.20

8.00 0.00
6069347.79
2187734.67

8.00 0.00
6069347.99
2187732.07

8.00 0.00
6069347.74
2187729.47

8.00 0.00
6069347.04
2187726.95

8.00 0.00
6069344.39
2187722.47

8.00 0.00
I Name l Sel. I M. 1 ID I Absorption I Z-Ext. 1 Cantilever I Height I Coordinates (ft) I (ft) I (ft) I (ft) I (ft) I (ft) I (ft) I (ft) I (ft) Building(s)
Name Sel. M. ID RB Residents Absorption Height Coordinates Begin x y zTround
(ft) (ft) (ft) (ft) (ft)
Ground Absorption(s)
NamejSeI.jM.jIDj G I Coordinates
x y
(ft) (ft)
73 Urban Crossroads, Inc. (j-

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15418-06 Noise_Study.docx
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1401 QUAIL STREET RESIDENTIAL PROJECT EIR ADDENDUM

CITY OF NEWPORT BEACH
Appendices
Appendix H Sewer Study
PlaceVorks

1401 QUAIL STREET RESIDENTIAL PROJECT EIR ADDENDUM

CITY OF NEWPORT BEACH
Appendices
This page intentionally left blank.

Marcb 2024'��

70862
V tit.

A .N�
Sewer Capacity Study
FOR
1401 Quail Street
Newport Beach, CA 92660
Prepared By:

ADAMS STREETER
C i v i l E n g i n e e r s
Adams -Streeter Civil Engineers, Inc.
16755 Von Karman Avenue, Suite 150, Irvine CA 92606
F (949) 474-2330
October 20, 2023
H-1

TABLE OF CONTENTS
I. Introduction
II. Existing and Developed Site Conditions
III. Existing and Proposed Sewer System Layout
IV. Design Criteria
IV.1. Sewer Design Criteria
IV.2. Maximum Allowed Flow
IV.3. Existing Flow Rates
IVA. Proposed Flow Rates
V. Results and Conclusion

APPENDICES
A. Vicinity Map
B. Sewer Design Criteria
C. Existing Flow Calculations and Segment Capacity
D. City of Newport Beach SMP Exhibits
H-2

I. INTRODUCTION:

The purpose of this study is to provide a site -specific sewer capacity study to assess the amount of wastewater generated by the proposed development of the project site at 1401 Quail Street, Newport Beach, CA. This sewer study will assess if the city sewer system capacity is sufficient when the project site is redeveloped from a commercial site to a residential site and if the change in the sewer usage complies with the City of Newport Beach's design criteria indicated in the City's Sewer Master Plan (SMP).

H-3

II. EXISTING AND DEVELOPED SITE CONDITIONS:

Existing Conditions:

The proposed project site, approximately 1.71 acres, is located in the City of Newport Beach, Orange County, California. The site is at the North-West corner of Quail Street and Spruce Avenue and has an existing office building structure along with a surface parking lot. The current land use is for a 1-story office complex. The site is relatively flat and drains from south to north, and is identified as Assessor Parcel Number 427-332-

04. The zoning code is PC-11 and the site is enclosed by an existing parking lot to the West, Spruce Street to the South -East, and Quail Street to the North-East. See Figure 1 in Appendix A for the project Vicinity Map Information.

Developed Conditions:

The proposed project is comprised of a 7-story podium apartment building with one level of subterranean parking. Vehicular access to the building will be from the proposed driveway entrance on Spruce Avenue.
2 H-4

III. EXISTING AND PROPOSED SEWER LAYOUT:

Existing Sewer Layout
An existing sewer lateral off Spruce Street connects the private street to the existing 8" VCP public sewer main. The public sewer main originates on Spruce Street at the existing sewer laterals, with manhole ID MHM28_019, and drains in the northeast direction to manhole MHM28 018 at Quail Street. The sewer main then increases to a 10" diameter VCP and continues to the southeast to MHM28 033, located at the intersection of Quail Street and Dove Street. The sewer system maintains a 10" diameter and continues to the north to manhole MHM28 003, located at the intersection of Dove Street and Newport Place. The sewer main then increases to 15" diameter and continues to the east to Macarthur Blvd. and then to the north to MHM28 051. The sewer main then increases to an 18" diameter and continues for a short run to MHM27 to discharge in to the Orange County Sanitation District sewer main. For data analyzing purposes, the study will separate this sewer path into 4 different segments. See Figure 1 below for a graphic representation of the existing sewer system. a]
ti
4t�~
N1HM28 ❑51
491
R Segment#4
MHM28-003 01+ w .,ix + �•t
Segment#3
,r-
ProJect Area MHM28-018
0 MHM28-019 0
Segment#1
Segment#2 MHM 28-033
{4
r
a�
,4
Figure 1. Existing Sewer System at Project Site
H-5

Proposed Sewer Layout
No change to the public sewer system is proposed as part of this project and the existing 8" VCP sewer lateral servicing the site is proposed to be re -used for the development. The only change proposed will be made for the land use of the project site from a commercial use to a residential use. The project site is currently an office complex with a surface -level parking lot. The proposed project will redevelop the site to construct a 7-story 16-unit podium building, with 6 levels of residential apartment over 1 level of slab grade parking garage, and 1 level of sub-terranean parking. The change in use for the site is anticipated to increase the rate of discharge to the system and are further detailed and justified below.

IV. DESIGN CRITERIA:

IVA. Sewer Design Criteria
Design criteria utilized in this report are based on the City of Newport Beach's Sewer Master Plan (SMP) prepared by AKM Consulting Engineers (August 2010) The focus of this study is to calculate the generation rates for the existing and proposed development based on land use generation rates in order to calculate the projected ratio of flow depth versus pipe diameter (d/D).
d/D Requirements: Based on the City's SMP, existing sewer pipes are considered deficient if this ratio is greater than 0.6 at peak dry weather flows and 0.8 at peak wet weather flows.

Manning's Friction Factor: Per City's SMP requirements, a Manning's friction factor of

0.013 has been utilized on all flow calculations.

Flow Generation Rates: Since water use records were unavailable to the parcels in the sewer system, a typical unit flow factor of 2500 gallons per day per acre (gpd/ac) is 4 H-6

utilized for the project based on the commercial use and the maps provided in the City's SMP (See Appendix D).

Peaking Factor (Dry Weather): Per the City's SMP, a peaking factor formal has been applied to the calculated daily generation rates as follows:

PDWF (mgd) = 2.20 x ADWF (mgd)0.92
See Table 1 below for a brief summary of the key design factors utilized in the report and Appendix B for a listing of the City's required design criteria for sewer systems.

Table 1. Sewer Design Criteria
Flow Depth vs Pipe
Diameter Ratio (d/D)
Manning's Friction
Factor (n value}
Unit Flow Factor
(gpd jac)
Peaking Factor

0.6 for all pipe sizes at peak
dry weather flaw
}DWF (rngd) =

0.013

2.'��
�L.2Q x ADVifF (rngd} o.�z

0.8 for all pipe sizes at peak
wet weather flow
IV.2. Maximum Allowed Flow
The maximum allowed flow for each segment has been determined by identifying the minimum diameter and slope of pipe within the segment, and calculating the flows for the given pipe diameter and slope at a d/D ratio = 0.6. Pipe flows were calculated utilizing the above noted design factors and the software, Hydraulic Toolbox, for each critical pipe segment (See Appendix C). The results of the calculations are included in the Table 2 below.

H-7

Table 2. Maximum Allowed Flow Segment Capacity of the Existing Sewer System Depth
Maximum
Pipe
Pipe
Minimum
of Flow
Allowed
Segment
MH Reach from
MH Reach to
Diameter D
Diameter D
Slope in
@
Flow @
Number
(in)
(ft)
Reach (%)
d/D=0.6
d/D = 0.6
(ft)
(CFS)
#1
MHM28 019
MHM28 018
8 0.67
1 0.4

0.82 #2
MHM28 018
MHM28 033
10 0.83

0.26 0.5

0.75 #3
MHM28 033
MHM28 003
10 0.83

0.4 0.5

0.93 #4
MHM28 003
MHM28 051
15 1.25

0.2 0.75

1.94 -
MHM28 051
MHM27
18 1.5

0.2 0.9

3.16 IV.3. Existing Flow Rates
The formula for the Average Dry Weather Flows (ADWF) is a function of the total tributary parcel acreage and the above noted generation rates. The formula is listed 70m
Q = A * 2500 gpd/ac
Where: Q = ADWF (gpd)
A = Tributary Area (Acres)
Known residential developments captured in this report include:
• 1300 Bristol St — 193 units @ 160 gpd/unit
• 1400 Bristol St — 221 units @ 160 gpd/unit
• 1600 Dove St — 249 units @ 160 gpd/unit
• Newport Crossing (1660 Dove SO701 Corinthian Way) — 350 units See figure 2 below for the assumed tributaries for each segment and refer to Appendix C for a listing of all Area -Based Flow Calculations.
h
H-8

Figure 2. Tributary Areas and Existing Wastewater Flows Given the Q values for the segments noted in Figure 2, the Q is converted to million gallon per day (mgd) which was subsequently used to calculate the peak dry weather flow for each segment based on the Peaking Factor Formula provided in the City's SMP. The calculated peak dry weather flow was then converted to cubic feet per second (cfs) and compared to the maximum allowed flow for the given segment (see 7 H-9

Table 2 for reference of existing segment capacities). See Table 3 below for a summary of the total peak flows compared to the maximum allowed flow of each segment.

Table 3. Existing Peak Flows and Maximum Allowed Flow

EXISTING PEAK DRY WEATHER FLOWS (PDWF) AND MAXIMUM ALLOWED FLOW Segment
#1
Segment
#2
Segment #3
Segment
#4
PDWF (mgd)

0.20 0.43

0.62 1.19
PDWF (cfs)

0.31 0.67

0.96 1.84
Maximum Allowed Flow
d/D = 0.6 (cfs)

0.82 0.75

0.93 1.94
Available Flow (cfs)

0.51 0.08
-0.03

0.10 Capacity Compliance
0 0

DEFICIENT
0 IVA. Proposed Flow Rates
The total area of the project site at 1401 Quail St, Newport Beach, CA is 1.71 acres.

Utilizing the typical unit flow factor of 2500 gpd/ac, the existing flow at the project location is calculated as 4,275 gpd. According to the City's SMP, the residential unit flow factors range from 110 gpd/du to 240 gpd/du (see Appendix D for the City's SMP Unit Flow Factor Map). Based on review of similar parcels within the City, a generation rate of 160 gpd/du has been selected for the subject parcel. Given the proposed 78 dwelling units, the calculated daily flow for the proposed condition is 12,480 gpd. As a result, the total increase in daily flow is calculated as the difference between the proposed flow and the existing flow at the project site, being 8,205 gpd. Results of this calculation are u u . -.170reTTV i 61@1W,I
Table 4. Total Daily Flow Increase at the Project Site
Existing Flow at Project
Proposed Flow at Project
Total Increase in Flow (GPD)
Site (GPD)
Site (GPD)
4,275
12,480
8,205
Based on the above noted increase in daily sewer generation rates, the total system peak flows were re -calculated with the additional 8,205 gpd added into each segment's calculations. The results of the proposed system flows are presented in Table 5 below. 8 H-10

Table 5. Peak Flows (Existing + Development) and Maximum Allowed Flow

PROPOSED PEAK DRY WEATHER FLOWS (PDWF) AND MAXIMUM ALLOWED FLOW Segment
#1
Segment
#2
Segment #3
Segment
#4
PDWF (mgd)

0.22 0.45

0.64 1.21
PDWF (cfs)

0.34 0.70

0.99 1.87
Maximum Allowed Flow
d/D = 0.6 (cfs)

0.82 0.75

0.93 1.94
Available Flow

0.48 0.05
-0.06

0.07 Capacity Compliance
0 0

DEFICIENT
0 V. RESULTS AND CONCLUSIONS:

Based on the above noted calculations, data, and the City's SMP guidelines, the existing sewer system has adequate capacity to handle the increase in projected daily sewer generation rates from the proposed development. Although when adding the sewer generation rates of other future developments in the surrounding area, the capacity of Segment #3 becomes deficient.

Sewer Segment #3, a 10" VCP sewer main located on Dove Street between Newport Place and Bowspirit Drive, would be considered deficient by the City's design requirements for the depth to diameter ratio. This is due not solely because of this development, but because of future development of other projects in the region. While the removal of the existing 10" VCP and installation of new 12" VCP sewer main would be required if all developments were to occur, it is not the scope of work for this project. 9 H-11

Appendix A: Vicinity Map
405
SITE
ti

UNIVERSITY OF

GALIFORNIA
WINE

VICINITY MAP
N_T_S_
H-12

Appendix B: Sewer Design Criteria
H-13

Sewer System Criteria
Collection Svstem
Ml tilmuro PIpe SIze
i I:

Minirnum VeW
2-0 fV80c at avorags flow

3.0 fVsoc. at peak dry weather flow
Pips Depth to Diameter

0.60 for el I pipe sizes at peak dry weather Now
Rabb for Exoslr" Pipes

0.80 for al pipe SizeS at peak wet weather flow
Pipe Depth to Diameter

0.50 for pipes 15-inches and smaller at peak dry weather flow Ratio for New

0.60 for pipes 18-inches and larger at peak dry weather flow GonsIraclion

0.80 for al I pipe sizes at peak wet weather flow
Minim urn Seror Slopes
Serer
Size
2 fVse c
veav-rity
3 fiVsoc
Woo ky
10 0.0022

0.0049
12 0.0017'
00038
is
0,0013

0.0029
is
0-0010

0.0022
21 0.0008

0.0018
24 O-O D07

0. 00115
* ssumaog &D = 0, 60 and n=0.013
H-14

Appendix C- Existing Flow Calculations
]2
H-15

8 Inch VCP @ 1.0% Slope
Segment #1 - MHM28_019 to MHM28_018
Channel Analysis
Type: I Circular Define...

Side Slope 1 (Z1 ): 0.0 H : 1V
Side Slope 2 (Z2): 0.0 H : 1V
Channel Width [B]: 0.0 [fk]
Pipe Diameter [D]: 0.67 [fk]
Longitudinal Slope: Jam [ftlft]
Manning's Roughness: O.0130
Enter Flow: 0.816 [cfs]
Enter Depth: O.400 [fk]
Calculate 1
Plot... Compute Curves...

Parameter
Flow
Value

0.816
nits
cfs
Depth

0.400
fk
Area of Flow

0.220
sq fk
Wetted Perimeter

1.183
fk
Hydraulic Radius

0.186
fk
Average Velocity

3.719
fps
Top Width [T]

0.657
fk
Froude Number

1.134
Critical Depth

0.427
fk
Critical Velocity

3.444
fps
Critical Slope

0.00023
fklfk
Critical Top Width

0.644
fk
Max Shear Stress

0.250
Iblft" 2
Avg Shear Stress

0.7 D_6
05 C 0-4
0 m
m 0_3
A
02 01
0 Station (ft)
H-16

10 Inch VCP @ 0.26% Slope
Segment #2 - MHM28_018 to MHM28_033
10 Inch VCP @ 0.26 io SlcrE
Type: I Circular Define...

Side Slope 1 (Z1): 10.0 H : 1V
Side Slope 2 (Z2): 0.0 H : 1V
Channel Width f8l 0.0 fftl
Pipe Diameter (D): 0.83 (ft)
Longitudinal Slope: 0.0026 (ft/ft)
Manning's Roughness: 0.0130
f' Enter Flow: 0.747 (cfs)
CO'Enter Depth: 10,500 (ft)
Calculate
.................Plot.... _Compute Curves...

X
Parameter Value I Units
Flow U. A cfs
Depth 0.500
ft
Area of Flow

0.341
sq ft
Wetted Perimeter

1.475
ft
Hydraulic Radius

0.231
ft
Average Velocity

2.194
fps
Top Width (T)

0.812
ft
Froude Number

0.597
Critical Depth

0.302
ft
Critical Velocity

3.075
fps
Critical Slope

0.00634
ft/ft
Critical Top Width

0.827
ft
Max Shear Stress

0.0 0.7
a�

0.4 w

0.3 0.2
0 0 0.2

0.4 0.6
Station (ft)

0.8 H-17

10 Inch VCP @ 0.40% Slope
Segment #3 - MHM28_033 to MHM28_003
10 Inch VCP @ 0.40% Slcre
Type: Circular Define...

Side Slope 1 (Z1): 10.0 H : 1V
Side Slope 2 (Z2): 0.0 H : 1V
Channel Width (B): 0.0 (ft)
Pipe Diameter (D): 0.83 (ft)
Longitudinal Slope: 0.004 (ft/ft)
Manning's Roughness: 0.0130
{' Enter Flaw: 0.927 (cfs)
Enter Depth: 0.500 (ft)
Calculate
If ..................Plot....................... Compute Curves... , XI
Parameter Value Units
Flow 0.927 ofs
Depth 0.500
ft
Area of Flow

0.341
sq ft
Wetted Perimeter

1.475
ft
Hydraulic Radius

0.231
ft
Average Velocity

2.721
fps
Tap Width (T)

0.812
ft
Froude Number

0.741
Critical Depth

0.427
ft
Critical Velocity

3.302
fps
Critical Slope

0.00663
ft/ft
Critical Top Width

0.830
ft
Max Shear Stress

0.125
Ib�-2
Avg Shear Stress

0.2 0.4 0.6 0.8
Station (ft)
H-18

15 Inch VCP @ 0.20% Slope
Segment #4 - MHM28_003 to MHM28_051
15In€h IrCP @ 0.20% Slope
Type: ICircular Define...

Side Slope 1 (Z1): 10.0 H : 1V
Side Slope 2 (Z2): 0.0 H : 1V
Chr nnel Wir"h [B]: 0.0 [ft]
Pipe Diameter [D]: 1.25 [ft]
Longitudinal Slope: 0.002 (ft/ft)
Manning's Roughness: 0.0130
f' Enter Flow: 1.941 [cfs]
Enter Depth: 0.750 (ft)
Calculate
Plot... Compute Curves... J
X
I Parameter
Value
I Units
Flow

1.941
cfs
Depth

0.750
It
Area of Flow

0.769
sq ft
Wetted Perimeter

2.215
It
Hydraulic Radius

0.347
ft
Average Velocity

2.525
fps
Top Width [T]

1.225
It
Froude Number

0.562
Critical Depth

0.555
ft
Critical Velocity

3.690
fps
Critical Slope

0.00546
ft/ft
Critical Top Width

1.242
It
Max Shear Stress
"0.043lb/ft
Avg Shear Stress
O Cancel
Circular Channel - Double click in pl... — ❑
Circular Charnel
0-5 1-0
Station (ft)
H-19

18 Inch VCP @ 0.20% Slope
MHM28_051 to MHM27
16 Inch VCP @ 0.20% Slope
Type: I Circular Define...

Side Slope 1 (Z1 ): 10.0 H : 1V
Side Slope 2 (Z2): 0.0 H : 1V
Channel Width (13): 0.0 [ft]
Pipe Diameter [D]: 1.5 [ft]
Longitudinal Slope: 0.002 (ft/ft)
Manning's Roughness: 0.0130
r Enter Flow: 130156 [cfs]
r Enter Depth: 0.900 [ft]
Calculate
Plot... I Compute Curves...

Parameter
Value
I Units
Flaw

3.156
cfs
Depth

0.900
ft
Area of Flaw

1.107
sq ft
Wetted Perimeter

2.650
ft
Hydraulic Radius

0.416
ft
Average Velocity

2.051
fps
Top Width [T]

1.470
ft
Froude Number

0.579
Critical Depth

0.676
ft
Critical Velocity

4.004
fps
Critical Slope

0.00510
ft/ft
Critical Top Width

1.493
ft
Max Shear Stress

0.112
Iblft"2
Avg Shear Stress

0.052
Ib/ft"2
O Cancel
Circular Channel - Double click in plat far... — ❑ X
Circular Cha el
14 12

1.0 r-
M
o
w 0-0

0.4 02
A 0_5 1.0 1_5
State on
H-20

AREA BASED SEWER
GENERATION RATES (2,500 GPD/AC)
Address or Parcel #
Area (acre)

AREA NAME
Tributary to
Segment #
Flow (GPD)
1400 Bristol St (221 DU)

2.38 A
1 35,360*
1300 Brsitol St (193 DU)

1.97 A
1 30,880*
1401 Quail St

1.70 A
1 4,250
1301 Quail St

1.85 A
1 4,625
SEGMENT 1 SUMMARY

7.90 A
-
75,115
*Flow is increased reflect actual future condition per sewer study reports prepared by Tait & Associates, August 2021 and December 2022.
1400 Quail St

1.47 B
2 3,675
1451 Quail St

0.71 B
2 1,763
1451 Quail St

0.71 B
2 1,763
1500 Quail St

1.59 B
2 3,967
1500 Quail St

0.79 B
2 1,983
1501 Quail St

1.11 B
2 2,775
1501 Quail St

1.11 B
2 2,775
1701 Quail St

1.22 B
2 3,050
1811 Quail St

0.69 B
2 1,725
No Site Address

2.15 B
2 5,381
3880 Birch St

1.21 B
2 3,025
2 Upper Newport Plaza Dr

0.18 B
2 450
6 Upper Newport Plaza Dr

0.76 B
2 1,900
3 Upper Newport Plaza Dr

0.20 B
2 500
4 Upper Newport Plaza

0.54 B
2 1,350
6 Upper Newport Plaza Dr

0.76 B
2 1,900
6 Upper Newport Plaza Dr

0.76 B
2 1,900
7 Upper Newport Plaza Dr

0.31 B
2 775
6 Upper Newport Plaza Dr (Different)

0.23 B
2 575
3620 Birch St

0.90 B
2 2,250
3610 Birch St

1.13 B
2 2,825
3600 Birch St

0.93 B
2 2,325
1550 Bristol St N

0.86 B
2 2,150
6 Upper Newport Plaza Dr

0.18 B
2 450
1 Upper Newport Plaza Dr

0.21 B
2 525
3636 Birch St

2.38 B
2 5,950
1800 Quail St

0.51 B
2 1,275
1900 Quail St

0.37 B
2 925
1300 Quail St

1.50 C
2 3,750
1301 Quail St

1.85 C
2 4625
1200 Quail St

1.00 C
2 2500
1100 Quail St

1.15 C
2 2,875
1101 Quail St

1.00 C
2 2,500
1000 Bristol St

3.91 C
2 9775
1000 Quail St

1.52 C
2 3800
895 Dove St

1.98 C
2 4,938
901 Dove St

0.57 C
2 1,425
SEGMENT 2 SUMMARY

46.34 A+B+C
-
171,210
900 Bristol St

1.00 D
3 2500
3601 Jamboree Rd

2.87 D
3 7,175
895 Dove St

1.975
D
3 4,938
3901 McArthur Blvd

2.67 D
3 6,675
H-21

3901 McArthur Blvd

2.67 D
3 6,675
3901 McArthur Blvd

2.67 E
3 6,675
901 Dove St

0.57 E
3 1,425
901 Dove St

0.57 E
3 1,425
3991 McArthur Blvd

0.83 E
3 2,075
1001 Dove St

1.51 E
3 3,775
1101 Dove St

1.49 E
3 3,725
1000 Dove St

0.90 E
3 2,250
1151 Dove St

1.75 E
3 4,375
1201 Dove St

1.80 E
3 4,488
1201 Dove St

1.80 E
3 41488
1200 Dove St

2.17 E
3 5,417
1200 Dove St

2.17 E
3 5,417
3991 McArthur Blvd

0.83 E
3 2,075
1050 Dove St

1.56 E
3 3,900
SEGMENT 3 SUMMARY

78.13 A+B+C+D+E
-
250,683
1600 Dove St (249 DU)

2.49 F
4 39,840*
1701 Corinthian Way & 1660 Dove St
Newport Crossings (350 DU)

5.68 F
4 76,050*
1401 Dove St

1.92 F
4 4,800
1301 Dove St

6.46 F
4 16,150
4100 Newport Place Dr

1.25 F
4 3,117
4241 McArthur Blvd

0.72 F
4 1,800
4221 McArthur Blvd

1.10 F
4 2,750
4100 Newport Place Dr

1.25 F
4 3,117
1601 Dove St

1.00 F
4 2,494
1601 Dove St

1.00 F
4 2,494
No Site Address

2.15 F
4 5,381
4000 Westerly PI

1.46 F
4 3,650
No Site Address

2.15 F
4 5,381
3990 Westerly PI

1.46 F
4 3,650
1500 Quail St

1.59 F
4 3,967
1500 Quail St

0.79 F
4 1,983
No Site Address

2.15 F
4 5,381
4200 Birch St

0.60 F
4 1,500
4200 Birch St

0.60 F
4 1,500
4250 Birch St

0.70 F
4 1,750
4250 Birch St

0.70 F
4 1,750
4251 McArthur Blvd

1.08 F
4 2,700
4229 McArthur Blvd

1.45 F
4 3,625
4301 McArthur Blvd

0.50 F
4 1,250
4301 McArthur Blvd

0.50 F
4 1,250
4341 McArthur Blvd

0.94 F
4 2,350
4343 McArthur Blvd

1.00 F
4 2,500
4545 McArthur Blvd

3.16 F
4 7,900
4545 McArthur Blvd

3.16 F
4 7,900
1375 Dove St

1.68 F
4 4,200
3901 Westerly PI

0.64 F
4 1,600
3919 Westerly PI

0.37 F
4 925
3900 Birch St

0.97 F
4 2,425
4000 Birch St

0.52 F
4 1,300
4001 Westerly PI

0.86 F
4 2,150
H-22

4020 Birch St

0.72 F
4 1,800
4029 Westerly PI

0.52 F
4 1,300
4100 Birch St

0.38 F
4 950
4120 Birch St

0.58 F
4 1,450
4101 Westerly PI

0.97 F
4 2,425
1901 Dove St

0.51 F
4 1,275
1801 Dove St

0.38 F
4 950
4100 Newport Place Dr

1.25 G
4 3,117
1200 Dove St

2.17 G
4 5,417
4141 McArthur Blvd

2.23 G
4 5,575
4101 McArthur Blvd

0.79 G
4 1,975
SEGMENT 4 SUMMARY
144.66
A+B+C+D+E+F+G
-
512,485
*Flow is increased reflect actual future condition per sewer study report prepared by Tait & Associates, January 2023 and Fuscoe Engineering, May 2017.

H-23

Appendix D — City of Newport Beach SMP Exhibits
13 H-24

CITY
OF

HUNTINGTON
BEACH

PACIFIC OCEAN
0 2,000 4,000
Newport Pier
8,000
N Feet
Balboa Pier

PACIFIC OCEAN
1a
Br
e a ohs
f
,00
a�
-go Creek Channel
1 1
I
l
J0
mac.`
San
?Spo 0,9
�atioh . o OSo
r
CITY
OF
IRVINE
Legend
City Boundary
Service Area Boundary
Commercial
General Industrial
Mixed Use Horizontal
_
Mixed Use Vertical and Water Related
_
Open Space
Public Facilities
Private Institutions
Parks and Recreations
Multiple Unit Residential
Single Unit Residential Attached
Single Unit Residential Detached
Two Unit Residential
Tideland and Submerged Lands
CITY
OF

LAGUNA BEACH
p .�
iA�
��
�� g.lk
i ��
PROJECT NO: 310735.10
DATE: May 2009

CITY OF NEWPORT BEACH

SEWER MASTER PLAN
Genaral Plan
Land Use
Figure 3-4

/V
TF

1401 QUAIL STREET RESIDENTIAL PROJECT EIR ADDENDUM

CITY OF NEWPORT BEACH
Appendices
Appendix I Assessment of Water Availability
PlaceWorks

1401 QUAIL STREET RESIDENTIAL PROJECT EIR ADDENDUM

CITY OF NEWPORT BEACH
Appendices
This page intentionally left blank.

Marcb 2024'��

Assessment of Water Availability for
Proposed Residential Development
FOR
1401 Quail Street
Newport Beach, CA 92660
Prepared By:

CIS

ADAMS STREETER
C i v i l E n g i n e e r s
Adams -Streeter Civil Engineers, Inc.
16755 Von Karman Avenue, Suite 150, Irvine CA 92606
F (949) 474-2330
r.�i70862
April 18, 2023
10z
clti�
�' CK�

TABLE OF CONTENTS
Introduction
II. Existing Conditions Analysis
III. Proposed Conditions Analysis
IV. Capacity Assessment and Conclusion

APPENDICES
A. Fire Hydrant Flow Test
B. WaterCAD Model and Results
1-2

I. INTRODUCTION:

The subject site is currently occupied by an office building on a 1.71-acre lot located at the north-west corner of Quail Street and Spruce Avenue with a land use classification of "General Commercial - Office". The proposed site will have a land use classification of "Very High Residential". The proposed site is anticipated to result in an increased local water demand and utilizes an existing 16" water main on Spruce St. for domestic water service. The purpose of this study is to determine the adequacy of the existing facilities to serve the proposed residential development. It is not meant to be a Water Supply Assessment under California SB610/SB221.

II. EXISTING CONDITIONS ANALYSIS
The existing facility is currently served by a fire water service and a second domestic water service, both of which connect to a 16" main located on Spruce St. Existing peak flows have been calculated based on section 4.4 "Land Use Demand Factors" of the City of Newport Beach Water Master Plan (WMP) based on the land use classification of "General Commercial - Office". Based on the WMP, average demand for the site is calculated as follows.

1.71 Acres x 2,000 GPD/acre = 3420 GPD or 2.38 GPM
Per City WMP, a peaking factor of 2.6 is required to calculate peak hour demand.

However, in order to provide a factor of safety, a peaking factor of 3.0 has been used for the purpose of calculating peak flow rates. Peak flow calculations are as follows:

2.38 GPM x 3.00 = 7.14 GPM of domestic water at peak demand 1-3

For this analysis, existing flow and pressure at the site were determined from a fire hydrant flow test conducted by the City of Newport Beach Utilities Department on 11/22/2022 (See Appendix A). The Fire hydrant tested (FH#B17) is located on Spruce Street, approximately 230 feet away in the south-westerly direction from the project site.

The findings of this flow test were then used to create a model of the domestic water pipe network in the immediate vicinity of the site using WaterCAD by Bentley Systems, Inc.

The following parcels on Quail Street and Spruce Street were considered in the water model. The land use is a combination of "Mixed -Use" and "General Commercial — Office" parcels. It was assumed that the 16" water main on Spruce street as well as the 16" & 8" water mains on Quail Street are servicing the existing parcels near the project site.

The same methodology that was used to gather the peak flow demand of the project site is used to find the peak flow demand of the other parcels. Please refer to the GIS map and the table below for clarification:
1-4

Land Use
Area
(acre)
GPD/Area
GPD
GPM
GPM x
Safety
Factor of
3 Project Site
General Commercial Office

1.710
2,000
3,420

2.38 7.14
Parcel #1
Mixed -use

1.151
2,200
2,532

1.76 5.28
Parcel #2
Mixed -use

1.000
2,200
2,200

1.53 4.58
Parcel #3
Mixed -use

1.506
2,200
3,313

2.30 6.90
Parcel #4
Mixed -use

1.472
2,200
3,238

2.25 6.75
Parcel #5
Mixed -use

3.700
2,200
8,140

5.65 16.96
Parcel #6*
Very High Residential

1.970
3,800
7,486

5.20 15.60
Parcel #7
General Commercial Office

1.415
2,000
2,830

1.97 5.90
Parcel #8
General Commercial Office

2.215
2,000
4,430

3.08 9.23
Parcel #9
General Commercial Office

4.775
2,000
9,550

6.63 19.90
Parcel #10*
Very High Residential

2.376
3,800
9,029

6.28 18.84
Total
-

23.290
-
56,169

39.02 117.07
*Land use for Parcel #6 & #10 has been changed to Very High Residential to reflect actual future condition per Water Study Reports prepared by Tait and Associates, Dec. 2021 and Dec. 2022.

III. PROPOSED CONDITIONS ANALYSIS
The site will be developed to have a categorized land use of "Very High Residential".

The proposed development will utilize a new domestic water, fire water, and irrigation water service laterals with a connection to the 16" water main on Spruce Street.

Proposed peak flows have been calculated based on section 4.4 "Land Use Demand Factors" of the City of Newport Beach Water Master Plan (WMP) based on the noted land use "Very High Residential". Based on the WMP, average demand for the site is calculated as follows:

1.71 acres x 3,800 GPD/acre = 6,498 or 4.51 GPM
Peak flow calculations are as follows:

4.51 GPM x 3.00 = 13.53 GPM of domestic water at peak demand 1-5

The peak demand for the proposed site would be 13.53 GPM which is 6.40 GPM higher than the existing condition.

The tables below depict the junction and pipe line serving the project site in both the existing and proposed condition. The full results of the model can be found in Appendix B.

EXISTING JUNCTION
DATA
Elevation
Demand
Hydraulic
Pressure
Label
(ft)
(gpm)
Grade (ft)
(psi)

PROJECT

41.5 7
273.56
100
SITE

PROPOSED JUNCTION DATA
Elevation
Demand
Hydraulic
Pressure
Label
(ft)
(gpm)
Grade (ft)
(psi)

PROJECT

41.5 14
273.52
100
SITE

EXISTING PIPE
DATA
Headloss
Length (Scaled)
Diameter
Flow
Velocity
Label
Material
Hazen -Williams C
Gradient
(ft)
(in)
(gpm)
(ft/s)
(ft/ft)
Asbestos
L-P
23 6
140
7 0.08
0 Cement

PROPOSED PIPE DATA
Headloss
Length (Scaled)
Diameter
Flow
Velocity
Label
Material
Hazen -Williams C
Gradient
(ft)
(in)
(gpm)
(ft/s)
(ft/ft)
Asbestos
L-P
23 6
140
14 0.16
0 Cement
0 1-6

IV. CAPACITY ASSESMENT AND CONCLUSION
An analysis of the existing conditions for both domestic water mains on Spruce Street and Quail Street resulted in velocity changes less than 0.08 FT/S and a pressure change of less than 1 PSI for domestic water usages which can be considered negligible. Therefore, it has been determined the existing public water system at the project site is more than adequate to handle the increased demand of the proposed residential development and will not adversely affect the existing network's ability to serve the surrounding developments.
_5
1-7

Appendix A: Fire Hydrant Flow Test
1-8

AMOUNT PAID: $458.00
CHECK NO:

TEST NO:

PROJECT:

PROJECT LOCATION:

TEST CONDUCTED FOR:

TEST PERFORMED BY:

TEST WITNESSED BY:

CITY OF NEWPORT BEACH

UTILITIES DEPARTMENT

FIRE HYDRANT FLOW TEST

SPRUCE AV ENUE
Nick Streeter

O'CAM PO/ AUGER
DATE: 11 /22/2022
TIME: 6:OOAM
WEATHER: CLEAR

FIELD OBSERVATIONS AND FLOW DATA
STATIC HYDRANT # : 817
LOCATION: 3661 Spruce
F/H MANUFACTURER: AVK
NUMBER & SIZE OF OUTLETS:

STATIC PRESSURE, (Ps , psi), PRE -FLOW:
98 RESIDUAL PRESSURE, (Pr, psi) FLOWING:
85 FLOW HYDRANT # : 818
LOCATION: 1400 Bristol
F/H MANUFACTURER: AVK
NUMBER & SIZE OF OUTLETS:

STATIC PRESSURE, PRE -FLOW (INFO ONLY, NOT FOR TEST CALCS) :

F/H OUTLET SIZE (2.5 or 4.0):

2.5 (d, inches)
FLOW LOSS COEFFICIENT - TUBE C=1.0 / BUTT C=0.9 0.9
PITOT GAUGE READING (p, psi ):
67 OBSERVED FLOW: THE OBSERVED FLOW FROM A HYDRANT OUTLET IS CALCULATED FROM THE FOLLOWING EQUATION: Q s = 29. 83(Cd 2) 2 P
2-2.5" 14"
2-2.5" 14"
WHERE; Q IS THE OBSERVED FLOW IN GPM; d IS THE OUTLET DIAMETER IN INCHES; p IS THE PITOT GAUGE PRESSURE IN PSI; AND C IS THE FLOW LOSS COEFFICIENT (C = 1.0 FOR FLOW TUBES AND C = 0.9 FOR BUTT FLOW READINGS ).

OBSERVED FLOW (Qs, gpm):
1373 GPM
DISCHARGE CALCS: THE DISCHARGE FOR A GIVEN FIRE HYDRANT CAN BE DETERMINED FROM THE FOLLOWING

EQUATION USING THE INITIAL ( STATIC) WATER PRESSURE AND THE RESIDUAL ( DYNAMIC ) WATER PRESSURE:

Q — s
Cp 20 �0.54
s
ps —pr
WHERE; Q ( STATIC OR RESIDUAL) IS THE FLOW IN GPM; AND P ( STATIC OR RESIDUAL) IS THE PRESSURE IN PSI. NOTE: A 10 PSI DROP IS REQUIRED FOR VALID TEST! CALCULATED FLOW AT 20 psi (Qr, gpm):
3614 JGPM
1-9

Appendix B: WaterCAD Model and Results
Im

Water Analysis for Existing Conditions
FlexTable: Junction Table
Label
Elevation
(ft)
Demand
(gpm)
Hydraulic
Grade (ft)
Pressure
(psi)
J-1

38.5 5
273.56
102
J-2

37.5 5
273.56
102
J-3

38.5 7
273.56
102
J-4

39.5 7
273.56
101
J-5

41.5 17
273.56
100
J-6

47.3 16
273.56
98 J-7

39.5 6
273.56
101
J-8

40.5 9
273.56
101
J-9

39.5 20
273.55
101
J-10

48.5 19
273.56
97 PROJECT SITE

41.5 7
273.56
100
ME

FlexTable: Pipe Table
Label
Length
(Scaled) (ft)
Diameter
(in)
Material
Hazen -Williams
C
Flow
(gpm)
Velocity (ft/s)
Headloss Gradient
(ft/ft)
L-1
57 6
Asbestos Cement
140
5 0.06
0 L-2
58 6
Asbestos Cement
140
5 0.06
0 L-3
57 6
Asbestos Cement
140
7 0.08
0 L-4
57 6
Asbestos Cement
140
7 0.08
0 L-5
80 6
Asbestos Cement
140
17 0.19
0 L-6
77 6
Asbestos Cement
140
16 0.18
0 L-7
26 6
Asbestos Cement
140
6 0.07
0 L-8
34 6
Asbestos Cement
140
9 0.1
0 L-9
57 6
Asbestos Cement
140
20 0.23
0 L-10
23 6
Asbestos Cement
140
19 0.22
0 L-P
23 6
Asbestos Cement
140
7 0.08
0 MP-1
4 48
Asbestos Cement
140
118

0.02 0
MP-2
77 16
Asbestos Cement
140
118

0.19 0
MP-3
30 16
Asbestos Cement
140
102

0.16 0
MP-4
182
16 Asbestos Cement
140
83 0.13
0 MP-5
36 16
Asbestos Cement
140
76 0.12
0 MP-6
224
16 Asbestos Cement
140
59 0.09
0 MP-7
17 16
Asbestos Cement
140
24 0.04
0 MP-8
120
16 Asbestos Cement
140
17 0.03
0 MP-9
204
16 Asbestos Cement
140
10 0.02
0 MP-10
128
16 Asbestos Cement
140
5 0.01
0 MP-11
140
16 Asbestos Cement
140
0 0
0 MP-12
268
16 Asbestos Cement
140
35 0.06
0 MP-13
188
16 Asbestos Cement
140
9 0.01
0 MP-141
148
1 16
1 Asbestos Cement
1 140
1 0
1 0
1 0
FlexTable: Pump Table
Hydraulic
Hydraulic
Flow
Label
Elevation
Grade
Grade
(Total)
Pump Head
(ft)
(ft)
(Suction) (ft)
(Discharge) (ft)
(gpm)
PMP-1

52.1 47.5
273.56
118
226.06
1-12

Water Analysis for Proposed Conditions
FlexTable: Junction Table
Label
Elevation
(ft)
Demand
(gpm)
Hydraulic
Grade (ft)
Pressure
(psi)
J-1

38.5 5
273.52
102
J-2

37.5 5
273.52
102
J-3

38.5 7
273.52
102
J-4

39.5 7
273.52
101
J-5

41.5 17
273.52
100
J-6

47.3 16
273.52
98 J-7

39.5 6
273.52
101
J-8

40.5 9
273.52
101
J-9

39.5 20
273.52
101
J-10

48.5 10
273.52
97 PROJECT SITE

41.5 14
273.52
100
1-13

0.02 0
MP-2
77 16
Asbestos Cement
140
125

0.2 0
MP-3
30 16
Asbestos Cement
140
109

0.17 0
MP-4
182
16 Asbestos Cement
140
90 0.14
0 MP-5
36 16
Asbestos Cement
140
76 0.12
0 MP-6
224
16 Asbestos Cement
140
59 0.09
0 MP-7
17 16
Asbestos Cement
140
24 0.04
0 MP-8
120
16 Asbestos Cement
140
17 0.03
0 MP-9
204
16 Asbestos Cement
140
10 0.02
0 MP-10
128
16 Asbestos Cement
140
5 0.01
0 MP-11
140
16 Asbestos Cement
140
0 0
0 MP-12
268
16 Asbestos Cement
140
35 0.06
0 MP-13
188
16 Asbestos Cement
140
9 0.01
0 MP-141
148
1 16
1 Asbestos Cement
1 140
1 0
1 0
1 0
FlexTable: Pump Table
Hydraulic
Hydraulic
Flow
Label
Elevation
Grade
Grade
(Total)
Pump Head
(ft)
(ft)
(Suction) (ft)
(Discharge) (ft)
(gpm)
PMP-1

52.1 47.5
273.52
125
226.02
1-14

22-2434-Water Study.wtg
12/14/2022
WaterCAD Model
Bentley Systems, Inc. Haestad Methods Solution Center
76 Watertown Road, Suite 2D Thomaston, CT 06787 USA +1-203-755- 1666
WaterCAD
[10.03.05.05]

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Newport Beach City CouncilApril 9, 2024

Newport Beach City Council
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