Appendix D - SUSMP1
STANDARD URBAN STORMWATER MITIGATION PLAN
(SUSMP)
For:
GARVEY EARLE PLAZA
MIXED-USE DEVELOPMENT
(7-UNIT COMMERCIAL AND 35-UNIT CONDOMINIUM)
8449 GARVEY AVE.,
ROSEMEAD, CA 91770
Prepared For:
WAIKIKI PROPERTY LLC/ MR.GERARD YANG
120 E.VALLEY BLVD,
SAN GABRIEL, CA 91776
CONTACT: CINDY LAU
CLAUHAMKT@AOL.COM
(626) 307-0062
Prepared By:
JACK C. LEE, PE, GE, LS
CAL LAND ENGINEERING, INC.
576 E. LAMBERT ROAD
BREA, CA 92821
(714) 671-1050
MAY 16, 2017
2
OWNER'S CERTIFICATION
STANDARD URBAN STORMWATER MITIGATION PLAN
for
GARVEY EARLE PLAZA
MIXED-USE DEVELOPMENT
(7-UNIT COMMERCIAL AND 35-UNIT CONDOMINIUM)
This Standard Urban Stormwater Mitigation Plan (SUSMP) for Garvey Earle Plaza has
been prepared for Waikiki Property LLC/ Mr. Gerard Yang by Calland Engineering, Inc.
The SUSMP is intended to comply with the requirements of the City of Rosemead, County
of Los Angeles, requiring the preparation of a project specific SUSMP.
I certify under penalty of law that this document and all attachments were prepared under
my jurisdiction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information submitted. Based on my
inquiry of the person or persons who manage the system or those persons directly
responsible for gathered the information, to the best of my knowledge and belief, the
information submitted is true, accurate, and complete. I am aware that there are significant
penalties for submitting false information, including the possibility of fine and imprisonment
for knowing violations.
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 Los Angeles County
Stormwater Quality Management Plan (SQMP), and the intent of the stormwater and
urban run-off NPDES Permit and Waste Discharge Requirements for the County of Los
Angeles, Los Angeles County Flood Control District and the incorporated Cities of Los
Angeles County under the jurisdiction of the Los Angeles Regional Water Quality Board. A
copy of this SUSMP will be maintained at the project site/office.
This SUSMP will be reviewed with the facility operator, facility supervisors, employees,
tenants, maintenance and service contractors, or any other party having responsibility for
implementing portions of this SUSMP. At least one copy of the approved and certified
copy of this SUSMP shall be available on the subject property in perpetuity. Once the
undersigned transfers its interest in the property, its successors-in-interest shall bear the
aforementioned responsibility to implement and amend the SUSMP.
__ WAIKIKI PROPERTY LLC
Owner’s Signature Company
GERARD YANG/ Owner _ 120 E.Valley BLVD., San Gabriel, CA 91776
Printed name / Title Company Address
_(626) 307-0062__________________ _____________________________
Telephone No. Date
3
PREPARER'S (ENGINEER) CERTIFICATION
STANDARD URBAN STORMWATER MITIGATION PLAN
for
GARVEY EARLE PLAZA
MIXED-USE DEVELOPMENT
(7-UNIT COMMERCIAL AND 35-UNIT CONDOMINIUM)
Engineer’s Name: Jack Lee
Engineer’s Title: R.C.E
Company: Cal Land Engineering INC.
Address: 576 E.Lambert Road, Brea, CA 92821
Email: Lee@callandeng.com
Telephone No.: (714) 671-1050
I hereby certify that this Low Impact Development Plan is in compliance with, and meets
the requirements set forth in, Order No. R4-2012-0175, of the Los Angeles Regional Water
Quality Control Board.
Engineer’s
Signature
Date 05/18/2017
Place
Stamp
Here
4
TABLE OF CONTENTS
I. PROJECT DESCRIPTION .................................................................................. 5
II. BEST MANAGEMENT PRACTICES (BMPS) ..................................................... 9
III. INSPECTION AND MAINTENANCE RESPONSIBILITY FOR BMP’S .............. 13
IV. OPERATION & MAINTENANCE ....................................................................... 14
V. HYDROLOGY CALCULATIONS ....................................................................... 36
VI. VICINITY MAP AND SITE PLAN ...................................................................... 55
VII. STORMWATER BIOFILTRATION SYSTEM ..................................................... 57
VIII. URBANGREEN SRPE CISTERN ...................................................................... 58
IX. DRAINAGE INSERT (FILTER) .......................................................................... 59
X. GOULDS PUPMS.............................................................................................. 61
XI. GEOTECHNICAL INFORMATION .................................................................... 64
XII. EDUCATION MATERIALS ................................................................................ 72
5
I. PROJECT DESCRIPTION
a. Project Owner:
Name of Project Owner: Waikiki Property, LLC
Add. of Project Owner: 120 E.Valley BLVD., San Gabriel, CA 91776
Telephone for Project Owner: (626) 307-0062
Waikiki Property, LLC owned all of the land on which the project site is
located and Waikiki Property, LLC will be responsible for maintaining the
building and grounds of the site.
Project Site Address: 8449 Garvey Avenue, Rosemead, CA 91770.
No Infrastructure will be transferred to Public Agencies
b. Permits
This permit is for 8449 Garvey Avenue, Rosemead, CA 91770. Other permits
required are, grading plan, Erosion Control
City of Rosemead Building Permit
City of Rosemead Grading Permit
c. Project Description
The project site is approximately 37,810 sf (0.868 acres) (after dedication @
Earle Avenue 260 sf). The proposed development of the site is to construct
commercial and 35-unit condominium.
Most of paved areas are composed of the building, parking lot and driveway.
Detailed development characteristics are following:
Approximate 9,637 square feet of the Building
Approximate 25,949 square feet of parking/drive way, sidewalk
Approximate 2,224 square feet of the landscape area and natural surface
During the construction period, material and products for construction use will
be stored temporarily in temporary staging area. Construction waste will be
generated and will be collected by subcontractor or general contractor
Several new sewer laterals will be proposed to be constructed on-site. The
sewer main connection will be coming from Garvey Avenue.
No new Street, roads or highway project is involved with this project. The work
of Garvey Avenue and Earle Avenue will be limited to improving the street from
its current stage to satisfy structures needed for this new development.
6
d. Site Description
The project site is located at the east north side of intersection Garvey Avenue
and Earle Avenue, City of Rosemead. The project is relatively flat, existing
drainage flow drains to south direction from north. Hydraulic calculation is
based on 50-year storm event. There is no off-site drainage for the lot. The
proposed development is to construct commercial and 35-unit condominium.
e. Drainage Characteristics
Because the project lies on bedrock area (See the Geotechnical Information
section for more details), the infiltration system will not be used. Capture and
reuse was considered at first for this project but since the expected volume of
stormwater that is needed to be capture needs to be irrigated within 72 hours
and because of the limited area for landscaping to irrigate, this condition cannot
be met. Thus, Capture and reuse will not be use as BMP for this project.
Therefore, capturing and using biofiltration system to treat 85th percentile rain
storm and pump out to street is applied.
All of run-off from roof, landscape, and parking areas will be diverted by
downspouts, catch basins and will be stored in Urbangreen SRPE Cisterns and
treated for pollutant by a modular Wetland System (model# MWS-L-8-12-V)
located at the northwest corner of the property below the basement parking.
After treated, the stormwater will be pump to street through a parkway drain.
Overflow from the biofiltration system will drain out through a parkway drain to
Earle Avenue. This storage and treatment device will mitigate all concerned
impairments. The sizing and volume of systems will be based on the 85th
percentile rain storm. See Section V for size and volume calculations.
f. Project Schedule
The proposed structures are anticipated to be constructed during February
2018 and completed the construction around February 2019.
g. Hydro modification
Los Angeles Regional Water Quality Control Board has jurisdiction over this
project site and the site is located in Los Angeles River watershed and is within
the Rio Hondo sub-watershed. Rio Hondo Reach 1 and Reach 2 are currently
listed in the Clean water act 303 (d) list due to impairment of Coliform Bacteria,
copper, lead, pH2, zinc and Trash. An underground drywell system will be
installed to mitigate storm water before leaving the project site
.
Impervious Area Estimate
Based on the available information, the whole site which is approximately 37,810 sf
(0.868 acres) (after dedication @ Earle Avenue 260 sf) will be disturbed. The site
has approximately
Ex. Pervious Percentage = 1.20% Ex. Impervious Percentage = 98.80%
Prop. Pervious Percentage = 5.88% Prop. Impervious Percentage = 94.12%
7
Peak Storm Water Runoff Discharge Rates
The site is currently occupied by a car rental. The design post-development peak
storm water runoff discharge rates will be lower than the estimated pre-
redevelopment rate for the project site. The decrease of flow rate is because of the
decrease of slope of the flow length on the propose design.
The computation for determining the runoff coefficients of the project site has been
performed and presented in the following:
Per Hydrology report:
Existing Q50-YR = 2.912 CFS
Proposed Q50-YR = 2.723 cfs
In accordance with our calculations, it is concluded that the proposed development
will not exceed the estimated runoff rate of the existing conditions.
Stormwater Quality Design Flow Calculation (SQDF)
Per Hydrology calculation
A = site area = 0.868 acres
Stormwater Quality Design for BMP (85th percentile storm)
QP, SWQDf = 0.287 cfs (see Section V)
SWQDv = 2,398.8 cf (see Section V)
VP, SWQDv = 3,598.2 cf (see Section V)
Per Hydrology Calculation
G Pollutants of Concerns
Storm water runoff from the site has the potential to contribute primarily bacteria
and viruses, nutrients, pesticides, sediments, trash and debris and oxygen
demanding substances. These pollutants are listed in the US EPA Report EPA-
840-B-92-002. These pollutants are considered potentially toxic to human, flora
and fauna if the detectable amount of the pollutants is in the water.
The site may expose storm water to Trash & litter that are in the driveway area
maybe exposed to storm water. Pesticide, nutrients and pathogens will be
considered because of the maintenance of the proposed landscape area of the
site.
H Mitigation
In an effort to mitigate the storm water flowing out of the site, all of run-off from
roof, landscape, and parking areas will be diverted by downspouts, catch basins
and will be stored in Urbangreen SRPE Cisterns and treated for pollutant by a
modular Wetland System (model# MWS-L-8-12-V) located at the northwest corner
of the property below the basement parking. After treated, the stormwater will be
pump to street through a parkway drain. Overflow from the biofiltration system will
8
drain out through a parkway drain to Earle Avenue. This storage and treatment
device will mitigate all concerned impairments. The sizing and volume of systems
will be based on the 85th percentile rain storm (3,598.2 cf). See Section V for size
and volume calculations.
The sizes and models of these cisterns and stormwater treatment are based on the
approved Hydraulic Calculations report. The cisterns can store a total volume
3,611.9 cubic feet of stormwater; also, stormwater biofiltration system model #
MWS-L-8-12-V has a primary peak treatment flow rate of 0.287 cfs. The project
85th percentile requires only 3,598.2 cf of stormwater stored and 0.346 cfs treated.
Therefore, the sizes of the underground cisterns and stormwater biofiltration
system are more than enough to mitigate the whole site. Also storm drain structure
will include an overflow that can handle the 50-year storm event (See Hydraulic
Calculations Report).
9
II. BEST MANAGEMENT PRACTICES (BMPs)
This section discusses the best Management Practices (BMPs) identified for this
project to reduce predictable pollutants in runoff entering storm drain systems that
drain to the ocean.
Structural and non-structural BMPs are defined as follows:
Structural BMPs – engineered facilities designed to function with and
compliment the project drainage system and address treatment of urban
pollutant problems.
Non-structural BMPs – consist of educational programs, management
practices, and regulatory approaches aimed at reducing pollutants in runoff
entering storm drain systems that drain to the ocean.
A. Site Design BMPs
Minimize Impervious Areas: Implemented
The project site has landscape areas and underground cisterns which are pervious
areas.
Preserve existing drainage patterns and time of concentration: Implemented
The driveway, walkway along the building matches the natural slope of the site.
This minimizes creating new retaining walls and; having the same slope and
materials used, the project mimics the natural drainage pattern and time of
concentration of the storm water run-off.
Utilize vegetated drainage swales in place of underground pipe: Not Implemented
Almost underground pipes of the project run under parking lots; hence, the
vegetated drainage swales cannot be implied.
Protect existing vegetation and sensitive areas: Not implemented
Existing site is a car rental; therefore. It has few of existing vegetation or sensitive
areas on the project site.
B. Source Control BMPs
The following presents the source control BMPs (routine non-structural and routine
structural) included in this project and those that were not included.
Routine Non-Structural BMPs
N1 Education for Property Owners and Occupants
Practical information material will be provided to the owner on general good
housekeeping practices for each type of site occupancy that contributes to
protection of storm water quality. Such information will include, but not be limited
to the attachments provided at the end of this report. In addition to the
attachments, the following resource can be contacted to obtain updated
educational information and pertinent ordinances free of charge:
10
American Oceans website – www.americanoceans.org/runoff/epa-bro.htm
This website provides a listing of the brochures available from various State
of California county and city agencies. The phone numbers of each of the
agencies are also provided on this website.
N2 Activity Restrictions
The following is a list of activity restrictions for the project site:
No car washing will be permitted on the premises.
No changing of oil or other auto repairs will be permitted on the premises.
Do not sweep grass clippings, dead leaves into catch basins, or other
landscaping related debris into catch basins.
Do not perform paint cleanup activities in paved areas or allow rinse water
from these activities to enter the storm drain system. Clean brushes
containing water-based paint in a sink that is connected to the sanitary
sewer system.
Do not use detergents or other chemical additives when washing concrete
sidewalks or building exteriors, use potable water only and collect wash
water runoff using a vacuum truck, for proper offsite disposal.
Keep premises, as well as trash container areas, free of litter.
N4 BMP Maintenance
The responsible party (owner, agency name, phone number, and address) for
implementation of each non-structural BMP and scheduled cleaning of all structural
BMP controls shall be identified in this SUSMP.
N5 Title 22 CCR Compliance
Compliance with Title 22 of the California Code of Regulations and relevant
sections of the California Health & Safety Code regarding hazardous waste
management, to be enforced by the Los Angeles County Fire Hazardous Materials
Division on behalf of the State.
N10 Uniform Fire Code Implementation
The site shall comply with the Article 80 of the Uniform Fire Code enforced by the
fire protection agency.
N11 Common Area Litter Control
Regular maintenance will be conducted, consisting, at a minimum of site-wide litter
control, emptying of trash receptacles in common areas, and sweeping of
dumpster enclosure areas in order to reduce the likelihood of polluting storm water
runoff. Litter control maintenance shall be performed on the as-needed and
regular basis.
N14 Common Area Catch Basin Inspection
For development with POAs or commercial property and privately maintained
drainage systems, require the POA/owner to have privately owned catch basins (if
applicable) cleaned and maintained, as frequently as necessary, to prevent
sediment, garden waste, and trash, or other pollutants from entering the public
streets and storm drain systems. Also, area drains will be inspected a minimum of
once per year and cleaned if necessary
11
N15 Street Sweeping Private Streets and Parking Lots
Drive aisles and parking lots shall be swept on a regular basis using a vacuum
sweeper to reduce the discharge of pollutants into the storm drain system from
paved surfaces. Street sweeping shall be performed on the regular and as needed
basis.
Routine Structural BMPs
The following presents the routine structural source control BMPs which may be
applicable to the site.
SD-10 Site Design and Landscape Planning
Site Design will be used for allowing maximum pervious areas and landscaping.
Landscaping is proposed along the entire boundary fronting the street except
driveway approach
SD-11 Roof Runoff Control
Roof runoff will be connected to proposed pipes and diverted to the proposed
biofiltration system
SD-12 Efficient Irrigation
Irrigation systems shall be installed and programmed to apply proper volume of
water and avoid excess runoff. An Irrigation Management Plan shall be
implemented to verify the following minimum:
Water sensors are functioning properly (make adjustments as necessary);
Irrigation heads are adjusted properly to eliminate over-spray to hardscape
areas;
Irrigation timing and cycle lengths are adjusted in accordance with water
demands, time of year, weather, and day or nighttime temperatures; and
Plants with similar water requirements are grouped together (BMP S3).
The irrigation system proposed is part of the landscape plan. An Irrigation
Management Plan shall be implemented to verify that plants are grouped according
to similar water requirements in order to reduce excess irrigation runoff. A Smart
irrigation control should be installed with the irrigation plan.
SD-13 Storm Drain System Stenciling and Signage
The phrase “NO DUMPING – DRAINS TO OCEAN” or equally effective phrase
shall be stenciled on catch basins to alert the public and employees to the
destination of pollutants discharged into the storm drain system.
Catch basin stenciling shall be inspected and maintained on the regular and as
needed basis.
SD-32 Trash Storage Area
Trash container (dumpster) areas shall have drainage from adjoining roofs and
pavements diverted around the area(s), and: Dumpsters shall be leak proof and
have attached workable covers.
12
C. Treatment BMPs
Because the project lies on bedrock area (See the Geotechnical Information
section for more details), the infiltration system will not be used. Capture and reuse
was considered at first for this project but since the expected volume of stormwater
that is needed to be capture needs to be irrigated within 72 hours and because of
the limited area for landscaping to irrigate, this condition cannot be met. Thus,
Capture and reuse will not be use as BMP for this project. Therefore, capturing and
using biofiltration system to treat 85th percentile rain storm and pump out to street
is applied.
MP-52 Drain Inserts (Kristar FloGard Insert Filter)
The proposed catch basins will have catch basin inserts (Kristar FloGard Insert
Filter) installed in addition to protection bars to collect debris and litter prior to
entering the on-site treatment system. The filter inserts have been selected to
accommodate, up to and including, the 85th percentile storm event. Calculations of
the sizing can be found on Section V. The operations and maintenance of the
drainage system can be found on Section IV. Details can be found on Section IX.
Storage System (Urbangreen SRPE Cisterns) and Biofiltration Device
(Wetland System MWS-L-8-12-V)
The purpose of this BMPs, Urbangreen SRPE Cisterns and Wetland System
MWS-L-8-12-V, is to capture and treat 85th percentile storm event. Calculations of
the sizing can be found on Section V. The operations and maintenance of the
drainage system can be found on Section IV. Details can be found on Section VI
and VII.
All of run-off from roof, landscape, and parking areas will be diverted by
downspouts, catch basins and will be stored in Urbangreen SRPE Cisterns and
treated for pollutant by a modular Wetland System (model# MWS-L-8-12-V)
located at the northwest corner of the property below the basement parking. After
treated, the stormwater will be pump to street through a parkway drain. Overflow
from the biofiltration system will drain out through a parkway drain to Earle Avenue.
13
III. INSPECTION AND MAINTENANCE RESPONSIBILITY FOR BMP’S
The Entity Responsible for Maintenance
Waikiki Property, LLC is the property owners, see title page for name, address,
phone no. and will serve as the property management team for the site and will be
responsible for the inspection, implementation, and maintenance of the structural
and non-structural BMP Maintenance before sold.
Provide Proof of Ongoing BMP Maintenance
Minimum frequency for inspection and maintenance to ensure the effectiveness of
each structural source control BMP and each Treatment Control BMP.
To provide verification of maintenance provisions through appropriate means has
been included, see “Maintenance Covenant”, accepting responsibility for all structural
and treatment control BMP maintenance until the time the property is transferred,
The transfer of property to a private or public owner must have conditions requiring
the recipient to assume responsibility for maintenance of any Structural or Treatment
Control BMP to be included in the sales or lease agreement for that property.
Structural or Treatment Control BMP are located within a public area proposed for
transfer must meet design standards adopted by the public entity for the BMP
installed and should be approved by the County or other appropriated public agency
prior to its installation.
Appropriate mechanism for the long-term operation and maintenance shall be
included in the condition of transfer that property owners conduct maintenance
inspection of all Structural or Treatment Control BMP.
Please see attached operation and maintenance for frequency and procedure for
Structural BMPs
14
IV. OPERATION & MAINTENANCE
The following chart indicates the Source Control (Non-Structural) BMPs will be implemented at this site:
BMP BMP BMP Start Up
I.D. # Description Description of BMP and Method of Implementation Responsibility Date
N1
Education for
Property
Owners,
Tenant and
Occupants
Provide Literature including, but not limited to, the materials attached in
Education Materials.
Owners1 Prior to rain
events; as
needed
N2
Activity
restrictions
Pesticides and Herbicides shall be applied in accordance with the California
Department of Pesticides requirements. Must be performed by a state
certified applicator
Owners1 As needed
N4
Common Area
Catch Basin
Inspection
Regular maintenance will be conducted, consisting, at a minimum of cleaning
and/or inspection of the catch basin inserts. Detailed configuration of the
approved catch basin is attached with this plan and should be incorporated
into the site’s drainage design. This cleaning/inspection should be conducted
on a monthly basis and prior to any rainy season).
This will be implemented upon occupancy
Owners1 Upon start of
operation
N10 Uniform Fire
Code
Implementation
Check if there are necessary updates required Owners1 Once, upon
purchase of
unit
1. Owner will be responsible for initial BMP operation and maintenance. As the property is sold, new property owner shall be
responsible for operation and maintenance of each BMP’s on his/her respective lot.
2. The Owner is aware of the maintenance responsibilities of the proposed BMPs. A funding mechanism is in place to maintain the
BMPs at the frequency stated in the SUSMP Plan.
Owner: Waikiki Property LLC/ Mr.Gerard Yang
Address: 120 E. Valley Blvd., San Gabriel, CA 91776
Phone No.: (626) 307-0062
15
Post Construction Treatment (Structural) BMPs Installation
Complete the following chart by indicating which Structural BMPs will be installed at this site and provide (attach) a site map locating
structural BMPs as well as a detail drawing of each BMP which will be constructed to reduce storm water pollution after construction
is complete.
BMP BMP Description of BMP including dimensions, Maintenance Funding Source Maintenance Start Up
I.D. # Description details, make & model, etc. Responsibility For O & M Schedule Date
SD-13 Storm
Drain
System
Stenciling
and
Signage
All on-site storm drain inlets/ catch basins will
be labeled with "No Dumping Drains to Ocean"
or an equivalent message as directed by the
City.
Owner1 Owner1 Bi-monthly Upon start
of operation
SD-32 Trash
Container
Areas
Trash container area will have drainage from
adjoining roofs and pavements diverted
around the area. Dumpster shall be leak proof
and have attached workable covers. Keep lid
closed all the time and remove debris around
the container and within enclosure every two
weeks. This will be inspected every two
weeks.
Owners1 Owners1 On-going During
construction
1. Owner will be responsible for initial BMP operation and maintenance. As the property is sold, new property owner shall be
responsible for operation and maintenance of each BMP’s on his/her respective lot.
2. The Owner is aware of the maintenance responsibilities of the proposed BMPs. A funding mechanism is in place to maintain the
BMPs at the frequency stated in the SUSMP Plan.
Owner: Waikiki Property LLC/ Mr.Gerard Yang
Address: 120 E. Valley Blvd., San Gabriel, CA 91776
Phone No.: (626) 307-0062
16
Specific Operation and Maintenance Plan for Goulds Pump WS15D4.
See Attached
Specific Operation and Maintenance Plan for Wetland System MWS-L-8-12-V.
See Attached
Specific Operation and Maintenance Plan for Catch Basin Filter inserts.
See Attached
1. Owner will be responsible for initial BMP operation and maintenance. As the property is sold, new property owner shall be
responsible for operation and maintenance of each BMP’s on his/her respective lot.
2. The Owner is aware of the maintenance responsibilities of the proposed BMPs. A funding mechanism is in place to maintain the
BMPs at the frequency stated in the SUSMP Plan.
Owner: Waikiki Property LLC/ Mr.Gerard Yang
Address: 120 E. Valley Blvd., San Gabriel, CA 91776
Phone No.: (626) 307-0062
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
V. HYDROLOGY CALCULATIONS
Determine SWQDv
52
53
The project will be designed to comply with NPDES by capturing and treating the 85th
percentile 24-hr rainfall event.
Urbangreen SRPE Cistern
SWQDv = 2,398.80 cf
VRequest = 1.5 x SWQDv = 1.5 x 2,398.80 = 3,598.2 cf
Use two (2) Underground Cisterns
Diameter: 60 Inch = 5’
Length: 95’
Storage per L.F. = 19.01 C.F.
VProvide = 95’ x 19.01 x 2 = 3,611.9 cf
VProvide > VRequest OK
Stormwater Biofiltration System
QRequest = 0.287 cfs,
Using Stormwater Biofiltration System Model# MWS-L-8-12-V
QProvide = 0.36 CFS
QProvide > QRequest OK
Drainage Insert (Filter)
QRequest = 0.287 cfs,
Using FloGard Catch Basin Filter Model# FG-M2424 (to match the size of provided catch
basins)
QProvide = 1.7 CFS
QProvide > QRequest OK
Goulds Pupms
QProvide = 0.36 CFS
A: Calculation of total flow rate
Discharge rate: Q = 0.36 cfs = 162 gpm
Use one SUMP pump pit with two pumps
two (2) pumps to be used; each pump at 50% duty
Therefore the pump shall handle 81 gpm
B: Calculation of total dynamic head
Sump Elevation: 245.50’ Outlet Elevation: 266.11’
Length of Pipe: say 38’ (4” pipe)
1.Friction loss, 4” PVC pipe
a. 4” Horizontal pipe = 38’
b. 4” vertical pipe = 20.61’
c. one(1) 4” 90 degree elbow=10.1’
54
d. one(1) 4” PVC check valve=33.6’
e. Tee standard = 20.1
f. total equivalent length= 122.41’
Friction loss= 0.81/100x 122.41’x 0.54 (Coefficient factor) = 0.54’
Static head= 266.11 – 245.50 = 20.61’ (maximum)
2. Total dynamic head=friction loss + static head = 20.61 + 0.54 = 21.15’
C: Each pump shall deliver 81 gpm @ 21.15’ TDH
D: Pump model: Goulds pump model WS15D4, 1750 rpm, 230V/1 Phase, 1.5hp.
Control Panel: Rhombus, NEMA 4X duplex control panel
55
VI. VICINITY MAP AND SITE PLAN
56
57
VII. STORMWATER BIOFILTRATION SYSTEM
58
VIII. URBANGREEN SRPE CISTERN
59
IX. DRAINAGE INSERT (FILTER)
60
61
X. GOULDS PUPMS
62
63
64
65
XI. GEOTECHNICAL INFORMATION
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
XII. EDUCATION MATERIALS