HomeMy WebLinkAboutPA2023-0043_20230216_Rizko_WQMPPreliminary Water Quality
Management Plan
(pWQMP)
Project Name:
306 Via Lido Nord, Newport Beach, CA
Prepared for:
Camille & Joumana Rizko
224 Via Eboli
Newport Beach, CA 92663
Prepared by:
Toal Engineering, Inc.
139 Avenida Navarro
San Clemente, CA 92672
Tel: (949) 492-8586
______________________
Caleb Rios R.C.E 57587
Date Prepared: 02/13/23
Date revised: ________
JN 22225
Water Quality Management Plan (WQMP) 306 Via Lido Nord, Newport Beach, CA
RIZKO RESIDENCE Owner’s Certification
22225-WQMP
This Water Quality Management Plan (WQMP) has been prepared for Camille & Joumana
Rizko by Toal Engineering, Inc. The WQMP is intended to comply with the requirements of the
local NPDES Stormwater Program requiring the preparation of the plan.
The undersigned, while it owns the subject property, is responsible for the implementation of
the provisions of this plan and will ensure that this plan is amended as appropriate to reflect
up-to-date conditions on the site consistent with the current Orange County Drainage Area
Management Plan (DAMP) and the intent of the non-point source NPDES Permit for Waste
Discharge Requirements for the County of Orange, Orange County Flood Control District and
the incorporated Cities of Orange County within the Santa Ana Region. Once the undersigned
transfers its interest in the property, its successors-in-interest shall bear the aforementioned
responsibility to implement and amend the WQMP. An appropriate number of approved and
signed copies of this document shall be available on the subject site in perpetuity.
Owner:
Name/Title Camille and/or Joumana Rizko
Company
Address 224 Via Eboli, Newport Beach, CA 92663
Email
Telephone # (818) 288-8847
Signature Date
Project Owner’s Certification
Permit/Application No. Grading Permit No.
Tract/Parcel Map No.
Lots 846 &
Por. Lot 845,
Tract 907
Building Permit No.
CUP, SUP, and/or APN (Specify Lot Numbers if Portions of Tract) APN: 423-144-14
Water Quality Management Plan (WQMP) 306 Via Lido Nord, Newport Beach, CA
RIZKO RESIDENCE Table of Contents
22225-WQMP
Contents Page No.
I Discretionary Permit(s) and Water Quality Conditions…………………………...3
II.1 Project Description ...........................................................................................4
II.2 Potential Stormwater Pollutants .................................................................... 5
II.3 Hydrologic Conditions of Concern ................................................................. 6
II.4 Post Development Drainage Characteristics ................................................. 7
II.5 Property Ownership/Management ................................................................. 7
III.1 Physical Setting ............................................................................................... 8
III.2 Site Characteristics.......................................................................................... 9
III.3 Watershed Description .................................................................................. 10
IV. 1 Project Performance Criteria ......................................................................... 11
IV.3.1 Hydrologic Source Controls ........................................................................... 14
IV.3.2 Infiltration BMPs ............................................................................................ 15
IV.3.3 Evapotranspiration, Rainwater Harvesting BMPs ...................................... 16
IV.3.4 Biotreatment BMPs ......................................................................................... 17
IV.3.5 Hydromodification Control BMPs .................................................................. 18
IV.3.6 Regional/Sub-Regional LID BMPs ................................................................ 18
IV.3.7 Treatment Control BMPs ................................................................................ 18
IV.3.8 Non-structural Source Control BMPs ........................................................... 19
IV.3.9 Structural Source Control BMPs ................................................................... 20
IV.4.1 Water Quality Credits ..................................................................................... 21
IV.4.2 Alternative Compliance Plan Information ................................................... 22
V Inspection/Maintenance Responsibility for BMPs…………………………….23
VI Site Plan and Drainage Plan…………………………..………………………….…24
VII Educational Materials…………………………………..………………………….…25
Attachments
Attachment A………………………………………………………Operations & Maintenance Plan
Attachment B…………………………………………..BMP Fact Sheets and Sizing Calculations
Attachment C……………………………………………………………………Educational Materials
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Section I Discretionary Permit(s) and
Water Quality Conditions
Project Infomation
Permit/Application No. Tract/Parcel Map No.
Lots 846 &
Por. Lot 845,
Tract 907
Additional Information/
Comments:
306 Via Lido Nord
APN: 423-144-14
Water Quality Conditions
Water Quality Conditions
(list verbatim) There are no specific water quality conditions for this development.
Watershed-Based Plan Conditions
Provide applicable
conditions from watershed -
based plans including
WIHMPs and TMDLS.
At the time of this report, the 2012 Central Orange County (COC)
Watershed Management Area (WMA) Integrated Regional Watershed
Management Plan (IRWMP) is in effect for the Newport Coastal Streams
watershed. The WIHMP for Newport Bay – Newport Coast has not been
approved at this time. Watershed and impairment information is provided
in Section III.3.
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Section II Project Description
II.1 Project Description
Description of Proposed Project
Development Category
(Verbatim from WQMP):
Development in close proximity to an ESA:
Impervious surface of 2,500 square feet or more located within, directly
adjacent to (within 200 feet), or discharging directly into receiving waters
within Environmentally Sensitive Areas (ESAs).
Project Area (ft2): 4,050 Number of Dwelling Units: 1 SIC Code: 1521
Narrative Project
Description:
The project consists of: 1) the demolition and removal of on-site
improvements within the property; and 2) construction of a single-family
residence with attached garage, and appurtenant hardscape, landscape,
and drainage improvements.
Project Area
Pervious Impervious
Area
(acres or sq ft) Percentage Area
(acres or sq ft) Percentage
Pre-Project Conditions 115 sq. ft. 3% 3,935 sq. ft. 97%
Post-Project Conditions 40 sq. ft. 1% 4,010 sq. ft. 99%
Drainage
Patterns/Connections
Under existing conditions, the front ~40’ of the lot drains southerly via
surface flow into Via Lido Nord; runoff within the remaining portion of
the site is collected by area drains and presumably piped to the rear of the
lot for off-site discharge toward Newport Bay. There are no visible curb
cores on Via Lido Nord, and no visible outlets through the wall facing
Newport Bay. Runoff within Via Lido Nord is collected by the City storm
drain and discharged to Newport Bay.
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II.2 Potential Stormwater Pollutants
Pollutants of Concern
Pollutant
Choose One:
E=Expected to
be of concern
N=Not Expected
to be of concern
Additional Information and Comments
Suspended-Solid/ Sediment E N Expected pollutant for residential development.
Nutrients E N Expected pollutant for residential development.
Heavy Metals E N
Pathogens (Bacteria/Virus) E N Expected pollutant for residential development.
Pesticides E N Expected pollutant for residential development.
Oil and Grease E N Expected pollutant for residential development.
Toxic Organic Compounds E N
Trash and Debris E N Expected pollutant for residential development.
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II.3 Hydrologic Conditions of Concern
Determine if streams located downstream from the project area are determined to be potentially
susceptible to hydromodification impacts.
No – Show map
Yes – Describe applicable hydrologic conditions of concern below.
All post-project runoff will be conveyed to Via Lido Nord via surface flow or pipe discharge.
Street runoff then flows in a northwesterly direction before it is collected by the City storm drain
system and discharged directly to Lower Newport Bay. There are no potential
hydromodification impacts.
SITE
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II.4 Post Development Drainage Characteristics
Post-development roof and site runoff will be collected and conveyed via surface flow and pipe
flow to Via Lido Nord. Prior to off-site discharge, all roof and side yard runoff flows through
trench drain filter inserts for pollutant reduction; peak storm flows exceeding the capacity of the
trench drain filters will bypass and discharge directly into the street. Runoff discharged to Via
Lido Nord will then follow the existing off-site drainage pattern. The selected filter inserts are
discussed in further detail in Section IV.3.7
II.5 Property Ownership/Management
The property is currently privately owned and managed by Camille & Joumana Rizko.
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Section III Site Description
III.1 Physical Setting
Planning Area/
Community Name
Lido Isle
Location/Address 306 Via Lido Nord, Newport Beach, CA 92663
Project Area Description The subject site is a rectangular residential lot located on the northeast
side of Lido Isle, at the intersection of Via Lido Nord and Dijon. The
property is currently developed, with a residential building, attached
garage, and associated hardscape features such as walkways, patios,
concrete driveway, walls, and fences. The project site is bounded on
the north by Newport Bay, on the south by Via Lido Nord, and on the
east and west by similarly sized residential properties.
Land Use RM: Multiple Residential
Zoning RM: Multiple Residential
Acreage The project site measures 4,050 square feet (0.093 acres).
Predominant Soil Type Hydrologic Soil Group D per Orange County GIS Hydro Group Soils
Data.
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III.2 Site Characteristics
Precipitation Zone Per the Orange County Rainfall Zones Map, the project site is within the
rainfall zone with a Design Capture Storm Depth of 0.70 inches.
Topography
Based upon the existing site elevations shown on the Preliminary Grading Plan
prepared by Toal Engineering, Inc., there is roughly 12” of elevation difference
across the pad.
Drainage
Patterns/Connections
See discussions in Sections II.1 and II.4. Existing development runoff flows
south (toward Via Lido Nord) and northeast toward Newport Bay from a ridge
located ~40 feet from the Via Lido Nord right-of-way. Post-development
runoff is collected, treated, and discharged off-site onto Via Lido Nord.
Runoff within the street is collected by the City storm drain system and
discharged to Lower Newport Bay.
Soil Type, Geology, and
Infiltration Properties
This site is within an area designated “Soil Type HSG-D” per Orange County
GIS Hydro Group Soils Data
Site Characteristics (continued)
Hydrogeologic
(Groundwater)
Conditions
Per a recent report for the site prepared by Geofirm entitled “Preliminary
Geotechnical Investigation, Proposed Residence Remodel”, and dated
December 18, 2020 (Project No. 75239-00), hereinafter “Geofirm Report”,
groundwater was measured at an inferred depth of ~10 feet below grade.
Geotechnical Conditions
(relevant to infiltration)
Per the Geofirm Report, the site shall be constructed such that “no water
ponds in the vicinity of footings,” and roofs shall be guttered and discharge
conducted away from the house in a non-erosive manner…”.
Off-Site Drainage
The proposed pad is above the street grade on Via Lido Nord and the walkway
behind the house facing Newport Bay, and there are walls on both side yards
to prevent run-on from adjacent streets and properties.
Utility and Infrastructure
Information
Service laterals will be taken from utility main lines within the adjacent street
right-of-way.
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III.3 Watershed Description
Receiving Waters City Storm Drain Lower Newport Bay
303(d) Listed Impairments Lower Newport Bay is 303(d) listed for: Chlordane, Copper, DDT, Indicator
Bacteria, Nutrients, PCBs, Pesticides, and Sediment Toxicity.
Applicable TMDLs
Total Maximum Daily Loads (TMDLs) have been established for Copper,
Indicator Bacteria, Nutrients, and Pesticides; TMDLs are proposed for the
remaining 303(d) listed pollutants, but are not currently in effect.
Pollutants of Concern for
the Project
The Pollutants of Concern for this project include: Indicator Bacteria,
Nutrients, and Pesticides.
Environmentally Sensitive
and Special Biological
Significant Areas
Lower Newport Bay is an ESA, listed on the CWA Section 303(d) list of
impaired waters.
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Section IV Best Management Practices (BMPs)
IV. 1 Project Performance Criteria
Describe project performance criteria. Several steps must be followed in order to determine what
performance criteria will apply to a project. These steps include:
• If the project has an approved WIHMP or equivalent, then any watershed specific criteria
must be used and the project can evaluate participation in the approved regional or sub-
regional opportunities. The local Permittee planning or NPDES staff should be consulted
regarding the existence of an approved WIHMP or equivalent.
• Determine applicable hydromodification control performance criteria.
• Determine applicable LID performance criteria.
• Determine applicable treatment control BMP performance criteria.
• Calculate the LID design storm capture volume for the project.
Is there an approved WIHMP or equivalent for the project area that
includes more stringent LID feasibility criteria or if there are
opportunities identified for implementing LID on regional or sub-
regional basis?
YES NO
If yes, describe WIHMP
feasibility criteria or
regional/sub-regional LID
opportunities.
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Project Performance Criteria (continued)
If HCOC exists,
list applicable
hydromodification
control
performance
criteria (Section
7.II-2.4.2.2 in
MWQMP)
For projects that may have an impact on the site’s hydrologic regime, an assessment of
potential hydromodification impacts and appropriate controls is required. If an
HCOC exists, priority projects shall implement on-site or regional hydromodification
controls such that:
• Post-development runoff volume for the two-year frequency storm does not
exceed that of the predevelopment condition by more than five percent, and
• Time of concentration of post-development runoff for the two-year storm event is
not less than that for the predevelopment condition by more than five percent.
List applicable LID
performance
criteria (Section
7.II-2.4.3 from
MWQMP)
• Priority Projects must infiltrate, harvest and use, evapotranspirate, or
biotreat/biofilter, the 85th percentile, 24-hour storm event (Design Capture
Volume).
• A properly designed biotreatment system may only be considered if infiltration,
harvest and use, and evapotranspiration (ET) cannot be feasibly implemented for
the full design capture volume. In this case infiltration, harvest and use, and ET
practices must be implemented to the greatest extent feasible and biotreatment
may be provided for the remaining design capture volume.
List applicable
treatment control
BMP performance
criteria (Section
7.II-3.2.2 from
MWQMP)
• If treatment control BMPs can treat all of the remaining unmet volume and have a
medium to high effectiveness for reducing the primary POCs, the project is
considered to be in compliance.
• If the cost of providing treatment control BMPs greatly outweighs the pollution
control benefits they would provide, a waiver of treatment control and LID
requirements can be requested and alternative compliance approaches must be
used to fulfill the remaining unmet volume.
Calculate LID
design storm
capture volume
for Project.
V = C * d * A * 43,560 sq. ft./acre * 1/12 in./ft
Where:
C = runoff coefficient = 0.75 * imp + 0.15 (imp = impervious area fraction = 0.99) = 0.89
d = Design Capture Storm Depth (0.70 in. per Orange County Rainfall Zones Map)
A = project area = 0.093 acres (4,050 sq. ft.)
V = 0.89 * 0.70 in. * 0.093 * 43560 sq. ft./acre * 1/12 in./ft
V = 210 cu. ft.
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IV.2. SITE DESIGN AND DRAINAGE PLAN
The following Site Design Practices have been considered for the proposed residential development:
- Preserve Existing Drainage Patterns and Time of Concentration (to the MEP)
- Minimize Construction Footprint (construction will be limited to only the area designated for
improvements)
The proposed site improvements include the single-family residence, driveway, exterior impervious walkways,
patios, and landscaping improvements. The construction footprint shall be limited to only the areas
designated for improvements per the Grading and Drainage Plans prepared by Toal Engineering, Inc.
There is a single Drainage Management Areas (DMA) for this single-family residential development. The
selected BMP will be used to meet the calculated Design Flow for the project DMA:
- Trench Drain Filters (Filter Inserts) – sized via capture efficiency method per the TGD.
DMA Area (sq. ft.) % Impervious BMP Type Sizing
1 4,050 0.99 PRE-2: Filter Inserts SWQDF
See discussion for the selected Treatment BMP in Section IV.3.7.
See the WQMP – BMP Site Plan provided in Section VI of this report for locations of site improvements,
drainage improvements, and Filter Insert BMPs.
See Attachment B for all sizing calculations related to the Filter Insert BMPs.
The GIS coordinates for the site are: 33.615468, -117.921189 (filter inserts located at all four corners).
33.
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IV.3 LID BMP SELECTION AND PROJECT CONFORMANCE ANALYSIS
IV.3.1 Hydrologic Source Controls
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)
As noted in Section II.1, there is limited pervious surface area; this is typical of the narrow lots on Lido Isle.
Further, the Geofirm Report recommends against ponding water in the vicinity of footings, which makes
infiltration infeasible for this development with 5’ setbacks.
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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:
Infiltration is not feasible. As noted earlier, the Geofirm Report recommends against water ponding in the
vicinity of footings, and groundwater occurs at an inferred depth of ~10 feet (limiting Infiltration BMP
options).
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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:
Other:
Other:
There is insufficient on-site landscaping for Harvest and Reuse of water as irrigation.
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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:
Exterior areas around the building are limited in size and specifically provide access to the home and around
its perimeter on this narrow lot. There are no significant areas beyond the development footprint for
construction of this BMP type.
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IV.3.5 Hydromodification Control BMPs
N/A - The property drains to Via Lido Nord, where runoff is collected by the City storm drain
system and discharged directly to Lower Newport Bay. No hydromodification controls are
required.
IV.3.6 Regional/Sub-Regional LID BMPs
Regional/Sub-Regional LID BMPs
N/A - This project will not participate in any Regional or Sub-Regional LID BMPs
IV.3.7 Treatment Control BMPs
Treatment Control BMPs
BMP Name BMP Description
PRE-2: Trench Drain Filters
Trench drain filters shall be placed inside the trench drains
located at the four corners of the development for treatment of
roof and side yard runoff.
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IV.3.8 Non-structural Source Control BMPs
Fill out non-structural source control check box forms or provide a brief narrative explaining if non-
structural source controls were not used.
Non-Structural Source Control BMPs
Identifier Name
Check One If not applicable, state brief
reason Included Not
Applicable
N1 Education for Property Owners,
Tenants and Occupants
N2 Activity Restrictions N/A; residential construction
N3 Common Area Landscape
Management
N4 BMP Maintenance
N5 Title 22 CCR Compliance (How
development will comply) N/A; residential construction
N6 Local Industrial Permit Compliance N/A; residential construction
N7 Spill Contingency Plan N/A; residential construction
N8 Underground Storage Tank
Compliance No underground storage tanks.
N9 Hazardous Materials Disclosure
Compliance No bulk storage of hazardous
materials
N10 Uniform Fire Code Implementation No bulk storage of hazardous
materials
N11 Common Area Litter Control N/A; residential construction
N12 Employee Training N/A; residential construction
N13 Housekeeping of Loading Docks No loading docks present
N14 Common Area Catch Basin Inspection Covered under N3 for SFR.
N15 Street Sweeping Private Streets and
Parking Lots Street sweeping performed by
Big Canyon HOA.
N16 Retail Gasoline Outlets N/A to this development.
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IV.3.9 Structural Source Control BMPs
Fill out structural source control check box forms or provide a brief narrative explaining if
Structural source controls were not used.
Structural Source Control BMPs
Identifier Name
Check One If not applicable, state brief
reason Included Not
Applicable
S1 Provide storm drain system stenciling
and signage All drain inlets are on private
property.
S2
Design and construct outdoor material
storage areas to reduce pollution
introduction
No outdoor material storage areas
S3
Design and construct trash and waste
storage areas to reduce pollution
introduction
S4
Use efficient irrigation systems &
landscape design, water conservation,
smart controllers, and source control
S5 Protect slopes and channels and
provide energy dissipation There are no significant on-site
slopes requiring protection.
Incorporate requirements applicable to
individual priority project categories
(from SDRWQCB NPDES Permit)
S6 Dock areas No dock areas.
S7 Maintenance bays No maintenance bays
S8 Vehicle wash areas No designated vehicle wash areas
S9 Outdoor processing areas No outdoor processing areas.
S10 Equipment wash areas No designated equipment wash
areas.
S11 Fueling areas No onsite fueling areas.
S12 Hillside landscaping No onsite hillside areas.
S13 Wash water control for food
preparation areas No outdoor food preparation
areas.
S14 Community car wash racks N/A; residential development
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IV.4 ALTERNATIVE COMPLIANCE PLAN (IF APPLICABLE)
IV.4.1 Water Quality Credits
Determine if water quality credits are applicable for the project.
Description of Proposed Project
Project Types that Qualify for Water Quality Credits (Select all that apply):
Redevelopment
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.
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).
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).
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).
Developments with
dedication of undeveloped
portions to parks,
preservation areas and
other pervious uses.
Developments
in a city center
area.
Developments
in historic
districts or
historic
preservation
areas.
Live-work developments, a
variety of developments designed
to support residential and
vocational needs together –
similar to criteria to mixed use
development; would not be able
to take credit for both categories.
In-fill projects, the
conversion of empty lots
and other underused
spaces into more
beneficially used spaces,
such as residential or
commercial areas.
Calculation of
Water Quality
Credits
(if applicable)
Water Quality Credits are not applicable to this single-family residential development.
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IV.4.2 Alternative Compliance Plan Information
Describe an alternative compliance plan (if applicable). Include alternative compliance obligations
(i.e., gallons, pounds) and describe proposed alternative compliance measures.
An Alternative Compliance Plan is not needed for this development, where the water quality design volume has
been met using Treatment BMPs.
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Section V Inspection/Maintenance
Responsibility for BMPs
The responsible party for this property will be the homeowners, Camille & Joumana Rizko.
See O&M Plan in Attachment A.
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Section VI Site Plan and Drainage Plan
VI.1 SITE PLAN AND DRAINAGE PLAN
Include a site plan and drainage plan sheet containing the following minimum information:
• Project location
• Site boundary
• Land uses and land covers, as applicable
• Suitability/feasibility constraints
• Structural BMP locations
• Drainage delineations and flow information
• Drainage connections
• BMP details
PROPOSED
RESIDENCE
F.F.=13.61
T/SLAB=13.42
PAD=______
PROPOSED
GARAGE
1 3 9 A v e n i d a N a v a r r o
S a n C le m e n t e , C A 9 2 6 7 2
9 4 9 .4 9 2 .8 5 8 6
w w w.t o ale n g i n ee r i n g .co m
C I V I L E N G I N E E R I N G
L A N D S U R V E Y I N G
STO RM WA TE R Q UA LI TY
CAMILLE & JOUMANA RIZKO
224 VIA EBOLI
NEWPORT BEACH, CA 92663
TEL: (818) 288-8847
PROPOSED SINGLE-FAMILY RESIDENCE
RUNOFF FLOW DIRECTION
CONCRETE SURFACE (IMPERVIOUS)
DRAIN INLET / DOWNSPOUT
WQMP LEGEND
PROPOSED DRAIN LINE
TREATMENT BMP: FILTER INSERT
PROPOSED LANDSCAPE (PERVIOUS)
STORMWATER PUMP
BMP TABLE
PROJECT INFORMATION:
PROPOSED FORCE MAIN PIPE
RAISED WALK OVER CONCRETE (IMPERVIOUS)
SD
FM
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Section VII Educational Materials
Refer to the Orange County Stormwater Program (ocwatersheds.com) for a library of materials
available. For the copy submitted to the Permittee, only attach the educational materials specifically
applicable to the project. Other materials specific to the project may be included as well and must
be attached.
Education Materials
Residential Material
(http://www.ocwatersheds.com)
Check If
Applicable
Business Material
(http://www.ocwatersheds.com)
Check If
Applicable
The Ocean Begins at Your Front Door Tips for the Automotive Industry
Tips for Car Wash Fund-raisers Tips for Using Concrete and Mortar
Tips for the Home Mechanic Tips for the Food Service Industry
Homeowners Guide for Sustainable
Water Use Proper Maintenance Practices for Your
Business
Household Tips
Other Material Check If
Attached Proper Disposal of Household
Hazardous Waste
Recycle at Your Local Used Oil
Collection Center (North County) R-4 Home and Garden Care Activities
Recycle at Your Local Used Oil
Collection Center (Central County)
Recycle at Your Local Used Oil
Collection Center (South County)
Tips for Maintaining a Septic Tank System
Responsible Pest Control
Sewer Spill
Tips for the Home Improvement Projects
Tips for Horse Care
Tips for Landscaping and Gardening
Tips for Pet Care
Tips for Pool Maintenance
Tips for Residential Pool, Landscape and
Hardscape Drains
Tips for Projects Using Paint
Attachments
Attachment A
Operations and Maintenance Plan
Operations and Maintenance (O&M) Plan
for
The Rizko Residence
306 Via Lido Nord
Newport Beach, CA 92663
APN 423-144-14
Overall Responsible Party/Owner:
Camille & Joumana Rizko
224 Via Eboli
Newport Beach, CA 92663
Operations and Maintenance
BMP Reponsible Parties Inspection/ Maintenance Activities Required Minimum Frequency of Activities
PRE-2 – Catch Basin Inserts Owner and/or contracted
maintenance personnel Maintain per manufacturer’s instructions included herewith. Per schedule
N1 – Education for Property Owners,
Tenants and Occupants Owner
Practical information materials on general housekeeping
practices that contribute to the protection of storm water
quality are included in this WQMP.
Annually
N3 – Common Area Landscape
Management
Owner and/or contracted
maintenance personnel
The Owner may hire a landscape maintenance contractor to
maintain site landscaping. The Owner shall verify that
landscape activities are consistent with those in the County
Water Conservation Resolution (or city equivalent) that
include fertilizer and/or pesticide usage consistent with
Management Guidelines for Use of Fertilizers (DAMP Section
5.5).
Upon completion of construction.
N4 – BMP Maintenance Owner and/or contracted
maintenance personnel
Maintain BMPs in accordance with the information in this
table and the Operations and Maintenance Plan in this
WQMP.
Per schedule
N11 - Common Area Litter Control Owner and/or contracted
maintenance personnel Litter patrol and disposal. Weekly
N12 – Employee Training Owner and/or contracted
maintenance personnel
If the Owner hires a landscape maintenance contractor, the
maintenance contractor shall be provided a copy of the
WQMP.
Upon hire
N14 – Common Area Catch Basin
Inspection
Owner and/or contracted
maintenance personnel Inspect drain inlets and drain lines for proper function. Before and after storm events
S3 – Trash Storage Areas Owner and/or contracted
maintenance personnel
Clean out litter receptacles Weekly or when full
Keep waste collection areas clean Daily
Inspect solid waste containers for structural damage or leaks
regularly. Repair or replace as necessary. Weekly
S4 – Efficient Irrigation Systems Owner and contracted
maintenance personnel
Inspect irrigation system for leaks. Repair as soon as
observed. Weekly
Observe irrigation and check for excess watering / runoff. Weekly
Required Permits
This section must list any permits required for the implementation, operation, and maintenance of the BMPs. Possible examples are:
• Permits for connection to sanitary sewer
• Permits from California Department of Fish and Game
• Encroachment permits
If no permits are required, a statement to that effect should be made.
No permits required.
Forms to Record BMP Implementation, Maintenance, and Inspection
The form that will be used to record implementation, maintenance, and inspection of BMPs is attached.
Recordkeeping
All records must be maintained for at least five (5) years and must be made available for review upon request.
RECORD OF BMP IMPLEMENTATION, MAINTENANCE, AND INSPECTION
Today’s Date:
Name of Person Performing Activity (Printed):
Signature:
BMP Name (As Shown in O&M Plan) Brief Description of Implementation, Maintenance, and Inspection Activity Performed
Inspection and Maintenance Guide
FLOGARD® LOPRO TRENCH DRAIN FILTER
DRAIN A G E P R OTECTION SY
ST
E
M
S
A division of
Oldcastle Infrastructure
SCOPE:
Federal, State and Local Clean Water Act regulations and those of insurance carriers require that stormwater filtration systems be maintained and serviced on a recurring basis. The intent of the regulations is to ensure
that the systems, on a continuing basis, efficiently remove pollutants from stormwater runoff thereby preventing
pollution of the nation’s water resources. These specifications apply to the FloGard® LoPro Trench Drain Filter.
RECOMMENDED FREQUENCY OF SERVICE:
Drainage Protection Systems (DPS) recommends that installed FloGard LoPro Trench Drain Filters be serviced on
a recurring basis. Ultimately, the frequency depends on the amount of runoff, pollutant loading and interference
from debris (leaves, vegetation, cans, paper, etc.); however, it is recommended that each installation be serviced a minimum of three times per year, with a change of filter medium once per year. DPS technicians are available to do an on-site evaluation, upon request.
RECOMMENDED TIMING OF SERVICE:
DPS guidelines for the timing of service are as follows:
1. For areas with a definite rainy season: Prior to, during and following the rainy season.
2. For areas subject to year-round rainfall: On a recurring basis (at least three times per year).3. For areas with winter snow and summer rain: Prior to and just after the snow season and during the summer rain season.
4. For installed devices not subject to the elements (washracks, parking garages, etc.): On a recurring
basis (no less than three times per year).
SERVICE PROCEDURES:
1. The trench drain grate(s) shall be removed and set to one side.
2. The service shall commence with collection and removal of sediment and debris (litter, leaves, papers,
cans, etc.).
3. The trench drain shall be visually inspected for defects and possible illegal dumping. If illegal dumping has occurred, the proper authorities and property owner representative shall be notified as soon as practicable.
4. Using an industrial vacuum, the collected materials shall be removed from the filter liner. (Note: DPS
uses a truck-mounted vacuum for servicing FloGard LoPro Trench Drain Filters.)
5. When all of the collected materials have been removed, the filter assembly shall be removed from the drainage inlet. The outer filter liner shall be removed from the filter assembly and filter medium pouches shall be removed by unsnapping the tether from the interior ring and sent to one side.
The filter liner, PVC body and fittings shall be inspected for continued serviceability. Minor damage
or defects found shall be corrected on the spot and a notation made on the Maintenance Record.
More extensive deficiencies that affect the efficiency of the filter (torn liner, etc.), if approved by the customer representative, will be corrected and a quote submitted to the representative along with the Maintenance Record.
6. The filter liner and filter medium pouches shall be inspected for defects and continued serviceability
and replaced as necessary and the pouch tethers re-attached to the PVC body interior ring.
7. The grate(s) shall be replaced.
2
INSPECTION AND MAINTENANCE GUIDE
3
REPLACEMENT AND DISPOSAL OF EXPOSED FILTER MEDIUM AND COLLECTED
DEBRIS
The frequency of filter medium exchange will be in accordance with the existing DPS-Customer Maintenance
Contract. DPS recommends that the medium be changed at least once per year. During the appropriate service,
or if so determined by the service technician during a non-scheduled service, the filter medium pouches will be replaced. Once the exposed pouches and debris have been removed, DPS has possession and must dispose of it in accordance with local, state and federal agency requirements.
DPS also has the capability of servicing all manner of storm drain filters, catch basin inserts and catch basins
without inserts, underground oil/water separators, stormwater interceptors and other such devices. All DPS personnel are highly qualified technicians and are confined-space trained and certified. Call us at (888) 950-8826 for further information and assistance.
Attachment B
Worksheets, BMP Fact Sheets, and Excerpts
from
Technical Guidance Document
for
WQMP Section IV
Section IV.3.2
Infiltration BMPs
Table 2.7: Infiltration BMP Feasibility Worksheet
Infeasibility Criteria Yes No
1
Would Infiltration BMPs pose significant risk for
groundwater related concerns? Refer to Appendix VII
(Worksheet I) for guidance on groundwater-related
infiltration feasibility criteria.
X
Provide basis: Per the project geotechnical report, “groundwater was measured at an inferred depth of ~10 feet below grade.” Certain BMP types have restrictions when groundwater is within 10 feet
of the infiltrating surface.
2
Would Infiltration BMPs pose significant risk of increasing
risk of geotechnical hazards that cannot be mitigated to
an acceptable level? (Yes, if the answer to any of the
following questions is yes, as established by a geotechnical
expert):
• The BMP can only be located less than 50 feet away
from slopes steeper than 15 percent
• The BMP can only be located less than eight feet from
building foundations or an alternative setback.
• A study prepared by a geotechnical professional or an
available watershed study substantiates that stormwater
infiltration would potentially result in significantly
increased risks of geotechnical hazards that cannot be
mitigated to an acceptable level.
X
Provide basis: Narrow lot on Lido Isle with 5’ setbacks. All foundations are within 8 feet of property lines.
3 Would infiltration of the DCV from drainage area violate
downstream water rights? X
Provide basis: Per TGD Section 2.4.2.4, it is not anticipated that infiltration of runoff would violate water
rights in Orange County.
Worksheets from Orange County Technical Guidance Document (12-20-2013) See TGD for instructions and/or examples related to these worksheets www.ocwatersheds.com/WQMP.aspx
Partial Infeasibility Criteria Yes No
4
Is proposed infiltration facility located on HSG D soils or the
site geotechnical investigation identifies presence of soil
characteristics which support categorization as D soils?
X
Provide basis: The site is comprised of Hydrologic Soil Group D per County of Orange Hydro Soils Group GIS data.
5
Is measured infiltration rate below proposed facility less
than 0.3 inches per hour? This calculation shall be based
on the methods described in Appendix VII.
X
Provide basis: No infiltration testing performed because of the presence of HSC-D soils as confirmed by soils report.
6
Would reduction of over predeveloped conditions cause
impairments to downstream beneficial uses, such as
change of seasonality of ephemeral washes or increased
discharge of contaminated groundwater to surface
waters?
X
Provide citation to applicable study and summarize findings relative to the amount of
infiltration that is permissible:
No ephemeral washes or contaminated groundwater in the vicinity of the project.
7
Would an increase in infiltration over predeveloped conditions
cause impairments to downstream beneficial uses, such
as change of seasonality of ephemeral washes or
increased discharge of contaminated groundwater to
surface waters?
X
Provide citation to applicable study and summarize findings relative to the amount of
infiltration that is permissible:
No ephemeral washes or contaminated groundwater in the vicinity of the project.
8
Is there substantial evidence that infiltration from the project would result in a significant increase in I&I to the sanitary
sewer that cannot be sufficiently mitigated? (See Appendix XVII)
X
Provide narrative discussion and supporting evidence: Sewer Inflow and Infiltration information has not yet been added to the TGD.
Worksheets from Orange County Technical Guidance Document (12-20-2013) See TGD for instructions and/or examples related to these worksheets www.ocwatersheds.com/WQMP.aspx
Infiltration Screening Results (check box corresponding to result):
9
If any answer from row 1-3 is yes: infiltration of any volume is not feasible within the DMA or equivalent.
Provide basis:
Infiltration would increase geotechnical hazards with respect to proposed
foundations, and the project site is within Hydrologic Soil Group D.
Further, groundwater measured at 10 feet below grade would exclude
the use of most Infiltration BMPs.
X
10
If any answer from row 4-8 is yes, infiltration is permissible but is not
presumed to be feasible for the entire DCV. Criteria for designing biotreatment BMPs to achieve the maximum feasible infiltration and ET shall apply.
Provide basis:
11 If all answers to rows 1 through 10 are no, infiltration of the full DCV is potentially feasible, BMPs must be designed to infiltrate the full DCV to the maximum extent practicable.
Section IV.3.3
Rainwater Harvesting BMPs
Section IV.3.4
Biotreatment BMPs
Worksheet D: Capture Efficiency Method for Flow-Based BMPs
Step 1: Determine the design capture storm depth used for calculating volume
1 Enter the time of concentration, Tc (min) (See Appendix IV.2) Tc= 5
2
Using Figure III.4, determine the design intensity at which the estimated time of concentration (Tc) achieves 80% capture efficiency, I1 I1= 0.26 in/hr
3 Enter the effect depth of provided HSCs upstream, dHSC
(inches) (Worksheet A) dHSC= - inches
4 Enter capture efficiency corresponding to dHSC, Y2
(Worksheet A) Y2= - %
5
Using Figure III.4, determine the design intensity at which the
time of concentration (Tc) achieves the upstream capture
efficiency(Y2), I2
I2= -
6 Determine the design intensity that must be provided by BMP,
Idesign= I1-I2 Idesign= 0.26
Step 2: Calculate the design flowrate
1 Enter Project area tributary to BMP (s), A (acres) A= 0.093 acres
2 Enter Project Imperviousness, imp (unitless) imp= 0.99
3 Calculate runoff coefficient, C= (0.75 x imp) + 0.15 C= 0.89
4 Calculate design flowrate, Qdesign= (C x idesign x A) Qdesign= 0.022 cfs
Supporting Calculations
Describe system:
The project area is split into quadrants, with each having a similar tributary area to filter inserts installed within trench drains at the 4 corners of the site. The filtered runoff flow for each unit would be ~0.006
cfs, however, all trench drain filters will be adequately sized for treatment of the full design capture flowrate of 0.022 cfs (conservative design).
Provide time of concentration assumptions:
For this 1/10-acre site, with a total lot length of 90 feet, the time of concentration is estimated to be 5 minutes.
Worksheets from Orange County Technical Guidance Document (12-20-2013) See TGD for instructions and/or examples related to these worksheets www.ocwatersheds.com/WQMP.aspx
Worksheet D: Capture Efficiency Method for Flow-Based BMPs
Graphical Operations
Provide supporting graphical operations. See Example III.7.
TECHNICAL GUIDANCE DOCUMENT APPENDICES
XIV-78 December 20, 2013
PRE-2: Catch Basin Insert Fact Sheet
Catch basin inserts are manufactured filters or fabric placed in
a drop inlet to remove sediment and debris and may include
sorbent media (oil absorbent pouches) to remove floating oils
and grease. Catch basin inserts are selected specifically based
upon the orientation of the inlet and the expected sediment
and debris loading.
Opportunity Criteria
x Catch basin inserts come in such a wide range of
configurations that it is practically impossible to generalize
the expected performance. Inserts should mainly be used for
catching coarse sediments and floatable trash and are
effective as pretreatment in combination with other types of
structures that are recognized as water quality treatment
BMPs. Trash and large objects can greatly reduce the effectiveness of catch basin inserts with
respect to sediment and hydrocarbon capture.
x Catch basin inserts are applicable for drainage area that include parking lots, vehicle
maintenance areas, and roadways with catch basins that discharge directly to a receiving water.
OC-Specific Design Criteria and Considerations
□ Frequent maintenance and the use of screens and grates to keep trash out may decrease the
likelihood of clogging and prevent obstruction and bypass of incoming flows.
□ Consult proprietors for specific criteria concerning the design of catch basin inserts.
□ Catch basin inserts can be installed with specific media for pollutants of concern.
Proprietary Manufacturer / Supplier Websites
x Table XIV.2 is a list of manufacturers that provide catch basin inserts. The inclusion of these
manufacturers does not represent an endorse of their products. Other devices and manufacturers
may be acceptable for pretreatment.
Table XIV.2: Proprietary Catch Basin Insert Manufacturer Websites
Device Manufacturer Website
AbTech Industries Ultra-
Urban Filter™ AbTech Industries www.abtechindustries.com
Aquashield Aqua-
Guardian™ Catch Basin
Insert
Aquashield™ Inc. www.aquashieldinc.com
Bowhead StreamGuard™ Bowhead Environmental & Safety,
Inc. http://www.shopbowhead.com/
Contech® Triton Catch
Basin Filter™
Contech® Construction Products
Inc. www.contech-cpi.com
Contech® Triton Curb Inlet
Filter™
Contech® Construction Products
Inc. www.contech-cpi.com
Also known as:
¾Drop Inlet Filters
¾Catch Basin Filters
Catch Basin Insert (DrainPac™)
TECHNICAL GUIDANCE DOCUMENT APPENDICES
XIV-79 December 20, 2013
Table XIV.2: Proprietary Catch Basin Insert Manufacturer Websites
Device Manufacturer Website
Contech® Triton Basin
StormFilter™
Contech® Construction Products
Inc. www.contech-cpi.com
Contech® Curb Inlet
StormFilter™
Contech® Construction Products
Inc. www.contech-cpi.com
Curb Inlet Basket SunTree Technologies Inc. www.suntreetech.com
Curb Inlet Grates EcoSense International™ http://www.ecosenseint.com/
DrainPacTM United Storm Water, Inc. http://www.unitedstormwater.com
Grate Inlet Skimmer Box SunTree Technologies Inc. www.suntreetech.com
KriStar FloGard+PLUS® KriStar Enterprises Inc. www.kristar.com
KriStar FloGard® KriStar Enterprises Inc. www.kristar.com
KriStar FloGard LoPro
Matrix Filter® KriStar Enterprises Inc. www.kristar.com
Nyloplast Storm-PURE
Catch Basin Insert
Nyloplast Engineered Surface
Drainage Products www.nyloplast-us.com
StormBasin® FabCo® Industries Inc. www.fabco-industries.com
Stormdrain Solutions
Interceptor FabCo® Industries Inc. www.fabco-industries.com
Stormdrain Solutions
Inceptor® Stormdrain Solutions www.stormdrains.com
StormPod® FabCo® Industries Inc. www.fabco-industries.com
Stormwater Filtration
Systems EcoSense International™ http://www.ecosenseint.com/
Ultra-CurbGuard® UltraTech International Inc. www.spillcontainment.com
Ultra-DrainGuard® UltraTech International Inc. www.spillcontainment.com
Ultra-GrateGuard® UltraTech International Inc. www.spillcontainment.com
Ultra-GutterGuard® UltraTech International Inc. www.spillcontainment.com
Ultra-InletGuard® UltraTech International Inc. www.spillcontainment.com
Attachment C
Educational Materials