HomeMy WebLinkAboutPA2023-0118_20230627_WQMP_dated 6-12-2023Preliminary Water Quality
Management Plan
(pWQMP)
Project Name:
54 Linda Isle - Single Family Residence
Prepared for:
Gloria Mariman
54 Linda Isle
Newport Beach, CA 92660
Email: nbgloria@sbcglobal.net
Prepared by:
Toal Engineering, Inc.
139 Avenida Navarro
San Clemente, CA 92672
Tel: (949) 492-8586
Engineer: Adam L. Toal, PE Registration No.: RCE 59275
Prepared on:
6/12/2023
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence Owner’s Certification
23038 - WQMP
This Water Quality Management Plan (WQMP) has been prepared for Ms. Gloria Mariman 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 Gloria Mariman
Company N/A
Address 54 Linda Isle, Newport Beach, CA 92660.
Email nbgloria@sbcglobal.net
Telephone #
Signature Date
Project Owner’s Certification
Permit/Application No. Grading Permit No.
Tract/Parcel Map No. Lot 54
Tract 4003 Building Permit No.
CUP, SUP, and/or APN (Specify Lot Numbers if Portions of Tract) APN: 050-461-07
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence Table of Contents
23038 - 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
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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Section I Discretionary Permit(s) and
Water Quality Conditions
Project Infomation
Permit/Application No. Tract/Parcel Map No. Lot 54
Tract 4003
Additional Information/
Comments:
54 Linda Isle
APN: 050-461-07
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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Mariman Residence
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Section II Project Description
II.1 Project Description
Description of Proposed Project
Development Category
(Verbatim from WQMP):
Priority Project Category 5:
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): 4,560 Number of Dwelling Units: 1 SIC Code: 1521
Narrative Project
Description:
The project consists of: 1) the demolition and removal of on-site building
and site improvements within the proposed development limits; 2)
construction of a new 2-story single-family residence with an attached
garage, and appurtenant hardscape, landscape, and drainage
improvements; and 3) protection of the existing driveway and parking
stalls in the frontage per HOA guidelines.
Project Area
Pervious Impervious
Area
(acres or sq ft) Percentage Area
(acres or sq ft) Percentage
Pre-Project Conditions 300 sq. ft. 6.6% 4,260 sq. ft. 93.4%
Post-Project Conditions 300 sq. ft. 6.6% 4,260 sq. ft. 93.4%
Drainage
Patterns/Connections
The property is bisected front to back by an existing ridge. Runoff within
the front half flows southerly over the surface towards Linda Isle for
collection by the private Linda Isle drainage system (via curb inlet catch
basin at the southwest corner of the site), and is ultimately discharged to
Lower Newport Bay. The back (north) half of the site is sloped toward
Newport Bay, with runoff flowing as surface flow across the site and over
the bulkhead wall into Lower 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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Mariman Residence
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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.
As shown on the above excerpt from Figure 4 of Appendix XVI.3 in the North Orange County
Technical Guidance Document (TGD), the project site is located outside of the
hydromodification susceptibility area (hatched), and thus is not subject to hydromodification
control criteria.
SITE
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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II.4 Post Development Drainage Characteristics
Post-development roof and site runoff will be collected and conveyed, via drain inlets and pipes, to
the southwest corner of the site for discharge into the existing curb inlet catch basin on Linda Isle.
Prior to off-site discharge, all project area runoff will be treated on-site as discussed in Section IV of
this WQMP. Runoff discharged to Linda Isle then follows the existing off-site drainage pattern,
discharging into Lower Newport Bay via private HOA storm drain pipe. Site runoff will not
discharge directly over the bulkhead wall to Lower Newport Bay.
II.5 Property Ownership/Management
The property is owned by Gloria Mariman.
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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Section III Site Description
III.1 Physical Setting
Planning Area/
Community Name
Linda Isle Community Association
Location/Address 54 Linda Isle, Newport Beach, CA 92660
Project Area Description The subject site is a residential property on the north side of Linda
Isle at the southerly end of Linda Island, within the central section of
Newport Bay near Pacific Coast Highway. The property is currently
developed, with a residential building, attached garage, and
associated hardscape features such as walkways, patios and walls.
The project site is bound on the south by Linda Isle (private street),
the east and west by similar residential properties, and the north by
Newport Bay.
Land Use RS-D: Single-Unit Residential Detached
Zoning R-1: Single-Unit Residential
Acreage The property measures 5,720 square feet (0.131 acres), however, the
front ~1,080 sq. ft. is covered by the project driveway and community
parking spaces required by the HOA to remain “as-is”. The
remainder of the site constitutes the project area, and results in the
addition/replacement of 4,260 sq. ft. of impervious surfaces and 300
sq. ft. of pervious surfaces.
Predominant Soil Type Per the Orange County Public Works - Hydro Groups Soils Map, the
project is located within an area containing Type HSG-D soils.
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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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 and
Drainage Plan prepared by Toal Engineering, Inc., there is approximately 18
inches of relief across the project area.
Drainage
Patterns/Connections
See discussions in Sections II.1, II.4 and IV. Existing development area runoff
flows into the Linda Isle right-of-way and over the bulkhead wall at the rear
yard into Newport Bay via surface flow. Post-development, runoff is treated
and discharged into the community storm drain system for ultimate outlet to
Lower Newport Bay.
Soil Type, Geology, and
Infiltration Properties
This site is within an area designated “Soil Type HSG-D” per the Orange
County Public Works Hydro Groups Soils Map.
Site Characteristics (continued)
Hydrogeologic
(Groundwater)
Conditions
This section to be completed upon review and incorporation of the project
soils report.
Geotechnical Conditions
(relevant to infiltration)
This section to be completed upon review and incorporation of the project
soils report.
Off-Site Drainage
The site includes the following perimeter protections to avoid run-on: 1) block
walls along the side yards; 2) the bulkhead wall at the rear yard (Newport
Bay); and 3) descending surface slope from the development to the curb on
Linda Isle.
Utility and Infrastructure
Information
Service laterals will be taken from utility main lines within the adjacent street
right-of-way.
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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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 by the State Water Resources Control
Board for the following impairments: Chlordane, Copper, DDT, Indicator
Bacteria, Nutrients, and PCBs, Toxicity.
Applicable TMDLs Technical TMDLs for pesticides and toxic organics; TMDLs for remaining
pollutants are in the implementation phase.
Pollutants of Concern for
the Project Indicator Bacteria, Nutrients, and Pesticides.
Environmentally Sensitive
and Special Biological
Significant Areas
Lower Newport Bay is identified as an ESA, as it is a waterbody listed on the
CWA Section 303(d) list of impaired waters.
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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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.
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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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 = 0.93) = 0.85
d = Design Capture Storm Depth (0.70 in. per Orange County Rainfall Zones Map)
A = project area = 0.105 acres (4,560 sq. ft.)
V = 0.85 * 0.70 in. * 0.105 * 43560 sq. ft./acre * 1/12 in./ft
V = 227 cu. ft.
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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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)
- Disconnect Impervious Area (by providing landscape improvements adjacent to proposed impervious
walkways and driveway, where possible)
- Minimize Construction Footprint (construction will be limited to only the area designated for
improvements)
- Re-vegetate Disturbed Areas (disturbed areas not designated for impervious covering will be re-planted
in accordance with project landscape plans.
The proposed site improvements include the single-family residence, hardscape, landscape and drainage
improvements. The construction footprint shall be limited to only the areas designated for improvements per
the Preliminary Grading and Drainage Plans prepared by Toal Engineering, Inc. Impervious areas shall be
designed to drain into adjacent landscaping, to the maximum extent practicable. Disturbed areas within the
limits of project construction shall be re-planted upon completion of the project.
There is one (1) Drainage Management Area (DMA) for this single-family residential development. The
following HSC BMPs will be used to meet the design water quality goals for the project:
- Localized Catch Basin (PRE BMP) – sized via City of Newport Beach standards.
DMA Area (sq. ft.) % Impervious BMP Type Sizing
1 4,560 0.93 PRE-2: Catch Basin Insert City Std.
See discussion for the selected BMPs in Section IV.3.
See the WQMP Site Plan provided in Section VI of this report for locations of site improvements, drainage
improvements, and HSC BMPs.
See Attachment B for sizing calculations related to the selected BMP.
BMP Coordinates: DMA-1 33.61286, -117.90323
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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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)
Limited rear-yard and side yard surface area, the presence of Type D soils, and the proximity of
groundwater and Newport Bay, are all factors limiting the use of Hydrologic Source Control BMPs. Site
walkways are designed to drain into adjacent landscaping where possible, however, the implementation of
this BMP is limited and the effects are not quantified with respect to BMP sizing.
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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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 on site because of constraints due to Type D soils, groundwater, and proximity to
building foundations and the bulkhead wall.
See Infiltration Feasibility Worksheet in Attachment B.
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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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 use of this BMP. Further, the design storm has been addressed
using BMPs as discussed later in Section IV.3.
See Worksheet J in Attachment B.
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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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:
Biotreatment BMPs would require mechanical means (pump system) for stormwater discharge, and this
narrow site with minimal side yards does not provide adequate space for installation or use of this BMP type.
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
23038 - WQMP Page 18
IV.3.5 Hydromodification Control BMPs
As discussed in Section II.3, project runoff connects to the private community storm drain system,
which discharges to Lower Newport Bay. The project is not located within an area of potential
hydromodification susceptibility per the TGD. Hydromodification Control is not required for the
proposed development.
IV.3.6 Regional/Sub-Regional LID BMPs
Regional/Sub-Regional LID BMPs
There are no Regional or Sub-Regional LID BMPs in which this project can participate.
IV.3.7 Treatment Control BMPs
Treatment Control BMPs
BMP Name BMP Description
PRE-2: Catch Basin Insert
To address storm water treatment, Toal Engineering proposes
installation of an REM Triton Crescent Pipe Screen Filter within
the on-site drainage basin immediately upstream of the off-site
discharge point (the private storm drain catch basin on Linda
Isle). This filter is installed in front of the outlet pipe opening,
and is designed to capture sediment and debris on the basin side
of the insert, while filtering the water for other pollutants as it
passes horizontally through the media cartridge.
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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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
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
Linda Isle HOA.
N16 Retail Gasoline Outlets N/A to this development.
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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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
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
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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)
The proposed project does not qualify for water quality credits.
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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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 applicable to this development.
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Mariman Residence
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Section V Inspection/Maintenance
Responsibility for BMPs
Prepare and attach an Operation and Maintenance Plan. Identify the mechanism through which
BMPs will be maintained. Inspection and maintenance records must be kept for a minimum of five
years for inspection by the regulatory agencies.
See ATTACHMENT “A” of this WQMP.
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
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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
DMA-1: 4,560 S.F. (0.105 AC)
IMPERVIOUS AREA = 4,260 S.F.
PERVIOUS AREA = 300 S.F.
BMP-1 (PRE-2):
REM CRESCENT PIPE
SCREEN FILTER INSERT
CL
LI
N
D
A
I
S
L
E
LOT 54
TRACT NO. 4003
M.M. 188/13-19
LOT 55
LOT 53
N7
1
°
5
4
'
5
8
"
W
4
5
.
0
0
'
N18°05'02"E 124.00'
N18°05'02"E 124.00'
N7
1
°
5
4
'
5
8
"
W
4
5
.
0
0
'
CORE DRAIN PIPE
INTO EX. CURB INLET
CATCH BASIN
PROPOSED BUILDING
RUNOFF FLOW DIRECTION
CONCRETE SURFACE (IMPERVIOUS)
DRAIN INLET / DOWNSPOUT
WQMP LEGEND
PROPOSED DRAIN LINE
CATCH BASIN FILTER INSERT (PRE-2)
LANDSCAPING (PERVIOUS)
BMP TABLE
PROJECT INFORMATION:
1 3 9 A v e n i d a N a v a r r o
S a n C le me n t e , C A 9 2 6 7 2
9 4 9 .4 9 2 .8 5 8 6
ww w.to ale n g i n ee ri 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
ST O RMWA TE R Q UA LI TY
ADAM L. TOAL
R.C.E. 59275
DATE:
PAVED SURFACE (IMPERVIOUS)
Water Quality Management Plan (WQMP) 54 Linda Isle, Newport Beach, CA
Mariman Residence
23038 - WQMP Page 25
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
BMP Applicable? Yes/No
BMP Name and BMP Implementation, Maintenance and Inspection Procedures Implementation, Maintenance, and Inspection Frequency and Schedule Person or Entity with Operation & Maintenance Responsibility
Non-Structural Source Control BMPs
Yes N1. Education for Property Owners, Tenants and Occupants. The property owner (and tenants, if any) responsible for site maintenance shall be familiar with this WQMP in its entirety. Education shall be provided to contracted maintenance personnel and new staff using the project WQMP as a reference.
Owner shall keep up to date with BMP requirements. Annual review (minimum). Owner
Yes N2. Activity Restrictions. Reduce the use of water for car washing activities and hosing down of impervious surfaces. Activity restrictions shall continue on an on-going basis. Owner
Yes N3. Common Area Landscape Management. Maintain landscape areas to minimize erosion and over-irrigation, control pesticide and fertilizer use, remove pet waste and debris, and ensure proper filtration. Procedures for BMPs N11 and N14, as listed in this table, shall be implemented as part of this BMP for single family residential development.
Keep garden areas clean, planted, and weed free. Maintain irrigation system (valve run times, sprinkler heads, coverage, etc.) in proper working order. Keep inlet grates clean and clear of debris. Weekly inspection suggested; once per month (minimum)
Owner via maintenance contractors
Yes N4. BMP Maintenance. Inspect and maintain all BMPs as described herein.
All BMPs shall be inspected (1) prior to Oct. 1st each year; (2) during each month between October 1st and April 30th each year; and (3) at least twice during the dry season. Individual BMPs may have more frequent inspection and maintenance requirements as described herein.
Owner via maintenance contractors
No N5. Title 22 CCR Compliance
No N6. Local Water Quality Permit Compliance
No N7. Spill Contingency Plan
No N8. Underground Storage Tank Compliance
No N9. Hazardous Materials Disclosure Compliance
No N10. Uniform Fire Code Implementation
No N11. Common Area Litter Control. Pick up debris and trash to maintain a clean site, especially around trash receptacles and within parking areas.
BMP Applicable? Yes/No
BMP Name and BMP Implementation, Maintenance and Inspection Procedures Implementation, Maintenance, and Inspection Frequency and Schedule Person or Entity with Operation & Maintenance Responsibility
No N12. Employee Training.
No N13. Housekeeping of Loading Docks
No N14. Common Area Catch Basin Inspection. Inspect drain inlets and catch basins. Clean prior to storm season and as necessary no later than Oct. 1st each year. Keep grates in landscape areas clear of debris.
No N15. Street Sweeping Private Streets and Parking Lots.
Structural Source Control BMPs
No S1. Provide Storm Drain System Stenciling and Signage
No S2. Design Outdoor Hazardous Material Storage Areas to Reduce Pollutant Introduction
Yes S3. Design Trash Enclosures to Reduce Pollutant Introduction Keep trash storage areas clean and orderly. Weekly (minimum) Owner via maintenance contractors
Yes S4. Use Efficient Irrigation Systems and Landscape Design Ensure that sprinklers are working properly and minimize unnecessary irrigation.
Weekly (minimum)
Owner via maintenance contractors
No S5. Protect Slopes and Channels
No S6. Loading Dock Areas
No S7. Maintenance Bays and Docks
No S8. Vehicle Wash Areas
No S9. Outdoor Processing Areas
No S10. Equipment Wash Areas
No S11. Fueling Areas
No S12. Hillside Landscaping
No S13. Wash Water Controls for Food Preparation Areas
No S14. Community Car Wash Racks
BMP Name and BMP Implementation, Maintenance and Inspection Procedures Implementation, Maintenance, and Inspection Frequency and Schedule Person or Entity with Operation & Maintenance Responsibility
Treatment BMPs
Filter Insert: REM Triton Crescent Pipe Screen Filter Insert
• Inspect riser/box pipe for debris and sediment accumulation; clean the riser box/pipe when debris accumulations reach 60% (not to exceed 80%).
• Replace filter media cartridges when the outer surface is 50% coated with contaminants.
• Inspect three times per year, prior to, once during, and immediately after the rainy season (Oct. 1 to April 30 each year)
• Inspect filters at debris inspection intervals. Change filters as needed, and at least once per year during the pre-rainy season inspection for the first three years. After three years, the replacement frequency can be adapted to meet site conditions.
Owner via maintenance contractors
Required Permits
No permits are required for the implementation, operation, and maintenance of the BMPs listed in this WQMP.
Forms to Record BMP Implementation, Maintenance, and Inspection
A sample form for use in recording implementation, maintenance, and inspection of BMPs is included at the end of this Plan.
Recordkeeping
All records must be maintained for at least five (5) years and must be made available for review upon request.
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
REM | Revel Environmental Manufacturing, Inc. (888) 526-4736 sales@remfilters.com remfilters.com
Operation & Maintenance (O&M)
and Procedures
REM TRITON Filter Recommended Maintenance Procedures:
Maintenance and Inspections: In order to ensure proper operation, REM (Revel Environmental Manufacturing, Inc.) recommends that REM Stormwater filters be serviced and maintained when debris and pollutant accumulations exceed no more than 80% of the filter’s capacity. REM recommends that the filters are inspected and serviced at a minimum of three times (3X’s) per seasonal cycle year. The frequency and length of duration between inspections and maintenance may fluctuate based on specific site conditions such as local weather conditions, site use, and pollutant type and loading volume. Filter Media Replacement: In order to ensure proper operation, REM recommends that the FOG Media, or other specified media (such as Activated Carbon, and/or Zeolite) be replaced when the outer surface of media is no more than 50% coated with contaminants. (The surface area of REM’s standard FOG media is stark white in color. The media will blacken with encapsulated contaminants over time.) It is recommended that REM media packs and Bioflex be replaced a minimum of one time (1X) per seasonal cycle year. Sites with higher pollutant loading concentrations may require more frequent service and media replacement. Purchase replacement media packs from REM at (888) 526-4736 or sales@remfilters.com. Custom media configurations are available upon. Disposal:
Captured pollutant debris and spent media must be disposed of in accordance with all Federal, State, and
Local Laws and Regulations.
On-site Procedures for Triton Catch Basin Filter Inserts:
1. Secure area (proceed with traffic and pedestrian control plan).
2. Clean surface area immediately around each storm drain utilizing a stiff bristled push-broom, flat
shovel or industrial vacuum.
3. Proceed with confined space procedures as necessary.
4. Remove grate or manhole cover and set aside.
5. Inspect perimeter filter flange gasket. Confirm media cartridge is secure in the filter basin.
6. Remove debris trapped in grate slot openings.
7. Utilize an industrial vacuum to remove debris from within filter basin.
8. Pressure wash media pack through the stainless steel cartridge. (Avoid discharge by utilizing an
industrial vacuum to remove excess water while pressure washing).
9. Inspect media housed inside stainless steel cartridge. REM recommends replacing the filter media
a minimum of once a year (see Filter Media Replacement above).
10. Place grate or manhole cover back on catch basin grate frame.
11. Secure dated service lock-out tag on grate lid.
12. Identify catch basin on site map for tracking and reporting.
13. Note observations, concerns or recommendation regarding specific filter on maintenance report.
14. Remove pedestrian and/or traffic control barricades.
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: Infiltration BMPs will not pose a significant risk to local groundwater. Groundwater in the
vicinity of the project site is not used for drinking water.
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: Infiltration BMPs cannot be located at least 8-feet from building foundations.
3 Would infiltration of the DCV from drainage area violate
downstream water rights? X
Provide basis: There are no downstream water rights holders, since site drainage is conveyed via community storm drain system directly to the receiving water (Lower Newport Bay).
Table 2.7: Infiltration BMP Feasibility Worksheet (continued)
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: This site is within an area designated “Soil Type HSG-D” per the Orange County Public Works
Hydro Groups Soils Map.
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.
Provide basis:
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?
-
Provide citation to applicable study and summarize findings relative to the amount of infiltration
that is permissible:
Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative discussion of study/data source applicability.
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?
-
Provide citation to applicable study and summarize findings relative to the amount of infiltration
that is permissible:
Summarize findings of studies provide reference to studies, calculations, maps, data sources,
etc. Provide narrative discussion of study/data source applicability.
Table 2.7: Infiltration BMP Feasibility Worksheet (continued)
Infiltration Screening Results (check box corresponding to result):
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) Provide narrative discussion and supporting evidence:
Summarize findings of studies provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/data source applicability.
-
9
If any answer from row 1-3 is yes: infiltration of any volume is not feasible within the DMA or equivalent.
Provide basis: See narrative for Items #2 and #4 herein.
INFILTRATION IS NOT FEASIBLE
10
If any answer from row 4-7 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 11 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
Worksheet J: Summary of Harvested Water Demand and Feasibility
1 What demands for harvested water exist in the tributary area (check all that apply):
2 Toilet and urinal flushing □
3 Landscape irrigation □
4 Other:_______________________________________________________ □
5 What is the design capture storm depth? (Figure III.1) d 0.70 inches
6 What is the project size? A 0.105 ac
7 What is the acreage of impervious area? IA 0.098 ac
For projects with multiple types of demand (toilet flushing, irrigation demand, and/or other demand)
8 What is the minimum use required for partial capture? (Table
X.6) gpd
9 What is the project estimated wet season total daily use (Section X.2)? gpd
10 Is partial capture potentially feasible? (Line 9 > Line 8?)
For projects with only toilet flushing demand
11 What is the minimum TUTIA for partial capture? (Table X.7)
12 What is the project estimated TUTIA?
13 Is partial capture potentially feasible? (Line 12 > Line 11?)
For projects with only irrigation demand
14 What is the minimum irrigation area required based on conservation landscape design? (Table X.8) 0.075 ac
15 What is the proposed project irrigated area? (multiply conservation landscaping by 1; multiply active turf by 2) 0.007 ac
16 Is partial capture potentially feasible? (Line 15 > Line 14?) No
Provide supporting assumptions and citations for controlling demand calculation: Line 14: IA * 0.77, where 0.77 = min. required pervious acreage per impervious acre (Irvine Station). Line 15: Pervious project area = 0.007 acres of conservation landscaping.
Section IV.3.7
Treatment Control BMPs
Worksheet D: Capture Efficiency Method for Flow-Based BMPs
DMA - 1
1 Enter the time of concentration, Tc (min) (See Appendix IV.2)Tc=5 min
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=0 inches
4 Enter capture efficiency corresponding to dHSC, Y 2 (Worksheet
A)Y2=0 %
5
Using Figure III.4, determine the design intensity at which the
time of concentration (Tc) achieves the upstream capture
efficiency(Y2), I2
I2=0 in/hr
6 Determine the design intensity that must be provided by BMP,
Idesign = I 1I2 Idesign=0.26 in/hr
1 Enter Project area tributary to BMP (s), A (sf)A=4560 sf
Enter Project area tributary to BMP (s), A (acres)A=0.105 acres
2 Enter Project Imperviousness, imp (unitless) imp=0.93
3 Calculate runoff coefficient, C= (0.75 x imp) + 0.15 C=0.85
4 Calculate design flowrate, Q design= (C x i design x A)Qdesign=0.023 cfs
Provide time of concentration assumptions:
Minimum allowable time of concentration for small lot = 5 minutes.
Step 1: Determine the design capture storm depth used for calculating volume
Step 2: Calculate the design flowrate
Supporting Calculations
Describe system:
REM Triton Crescent Pipe Screen Filter placed around the discharge pipe at the base of the on-site
drainage riser immediately upstream from the point of off-site discharge. The selected model,
TR10CR(8) Crescent, has a filtered flowrate of 0.19 cfs, so it is adequately sized for the calculated
design flow of 0.023 cfs.
Graphical Operations
THE DESIGN AND DETAIL OF THIS
DRAWING IS THE PROPERTY OF
REM INC. AND IS NOT TO BE USED
EXCEPT IN CONNECTION WITH OUR
WORK, DESIGN AND INVENTION
RIGHTS ARE RESERVED.
PATENT PENDING
REM Inc.
PH: (888) 526-4736
DIMENSIONS ARE IN INCHES
UNLESS OTHERWISE NOTED.
DRAWN BY:FOR:REV
C.F.
SCA
LE 1/4 : 1 DATE: 3/1/2015 SHE
ET 1 OF 1
TRITON CPS SERIES
(Crescent Pipe Screen)
Inline Filtering
Notes:
REM TRITON CPS Series (Crescent Pipe Screen)
REM designed the TRITON CPS Filter Series to provide a highly adaptable solution that allows the flexibility to
maximize the filter treatment flow rates and TRASH capturing capacity. TRITON CPS filters are designed to capture
trash and debris, and may be utilized in new construction or retrofitted in existing catch basin structures. They are
sized to spec or modified in the field for drains with unusual dimensions and unique frame and grates. Optional filter
elements may be easily removed when servicing. Media strategy may be optimized for specific pollutant concerns.
Constructed with 10 Gauge Type 304 Welded Stainless Steel, the REM CPS unit offers superior strength to
go along with its “Arched” design.
CPS size may vary by catch basin. Taller
cartridge options provide greater volume
capacity and increased treatment rates.
GRATE
CATCH
BASIN
FILTERED
FLOW
FLOWFLOW
CAPTURED TRASH & DEBRIS
MADE INUSA
STAINLESS STEEL
CARTRIDGE
HOUSING
CATCH
BASIN
FILTER
ELEMENT
GRATE
TRITON CPS CRESCENT PIPE SCREEN
SERIES FILTER
By REM Inc. (888.526.4736)
EXIT
PIPE
OPTIONAL
DEFLECTOR PLATE
OVERFLOW
DEFLECTOR PLATE
(When Needed)
TRASH &
SEDIMENT
INCOMING
PIPE· The TRITON - Crescent Series Filters are available in
sizes to fit most industry standard pipes and catch
basins. Custom sizes are also available to fit most
applications.
· Filter cartridge housings are constructed utilizing 10
Gauge Type 304 Stainless Steel, with 2" welded
square openings.
· Removable CPS tops are constructed utilizing over
90% recycled ABS plastic.· Filter medium is configured with REM FOG media,
charged to capture hydrocarbons, trash and debris.
(Additional media options are available including trash
and debris guard PERF & BFTG, granulated carbon
(AC), Zeolite (ZEO) and mixed blends there of.)· Replacement Media-Pak’s are easily removed for
servicing.
· Filter designs include a high flow overflow bypass to
eliminate pooling or flooding during heavy rain events.
· Optional Deflector Plate routes flow onto the filtering
side of filter. Certain application may not need this
option.
· See our Specifier Sheet for sizes, and flow rates.
· Maintenance information and replacement media
packs are available upon request by contacting REM
at sales@remfilters.com or (888) 526-4736.
FLOW
SPECIFIER CHART
TRITON CRESCENT
FILTERS
FILTERING OF LATERAL PIPES (1" THRU 20" Dia.)
MEDIA REM - BFTG* FILTERED Flow Rate
MEDIA REM - FOG** FILTERED Flow Rate
MEDIA REM - FOG & BFTG*** FILTERED Flow Rate
REM - PERF 4.8MM FILTERED Flow Rate
TOTAL FILTER BYPASS Flow Rate
DEBRIS HOLDING CAPACITY
MODEL:( inch )CFS CFS CFS CFS CFS CUBIC FEET
Standard
10" CRESCENT 1" TO 7" Dia.3' X 3' CB
TR10CR(8) Crescent 0.82 0.19 0.19 1.58 2.57 5.91
TR10CR(16) Crescent 1.54 0.4 0.4 3.11 2.57 11.82
14" CRESCENT 1" TO 10" Dia.3' X 3' CB
TR14CR(8) Crescent 1.31 0.35 0.35 2.21 7.16 5.82
TR14CR(16) Crescent 2.46 0.72 0.72 4.38 7.16 11.6
20" CRESCENT 1" TO 16" Dia.3' X 3' CB
TR20CR(8) Crescent 2.14 0.51 0.51 2.86 15.48 5.43
TR20CR(12) Crescent 3.21 0.76 0.76 4.27 15.48 8.11
24" CRESCENT 1" TO 20" Dia.3' X 3' CB
TR24CR(8) Crescent 2.58 0.61 0.61 3.65 25.65 4.95
TR24CR(16) Crescent 5.15 1.21 1.21 7.59 25.65 9.89
40" CRESCENT 1" TO 36" Dia.3' X 4' CB
TR40CR(8)5.25 1.55 1.55 6.48 42.55 5.09
TR40CR(18)10.69 2.53 2.53 14.23 42.55 11.45
Notes:
REM Technical Support is available to assist with TRITON Series filter configurations, media strategies, and customization of models.
** Please see MEDIA OPTIONS page for different configurations of available media types.
** Standard configurations for the TRITON Crescent Series filter. Please specify if larger capacity filters are required. For shallow catch basins, choose the smaller Crescent height. Crescent heights are listed in ( ) next to each model number. Depending on available space, height adjustments can be made for shallow catch basin configurations. There should be at least 4" - 6" of head space between the top of filter and the grate. This allows for adequate flow through the overflow port when needed.
** Filter debris capacities can be modified to utilize the maximum dimensions of each specific catch basin. Volumes will either increase or decrease depending upon the size of the catch basin and Crescent filter size used. Volume capacities that are shown, are based on the catch basins standard inside wall dimensions, while utilizing the specific Crescent filter. Standard catch basin sizes are listed in the "Debris Holding Capacity" column.
*Flow rates calculated using 6" of head pressure, with gravitational flow. Comparative to filter height.
CAPTURED TRASH
& DEBRIS
TRITON – CRESCENT FILTER SERIES By REM Inc.
(888.526.4736) REMFILTERS.COM
EXIT
FILTERED FLOW
OVERFLOW BYPASS
FILTERED
FLOW
FLOW FLOW
OVERFLOW BYPASS
TRITON – CRESCENT FILTER SERIES By REM Inc. (888.526.4736) REMFILTERS.COM
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