HomeMy WebLinkAboutO&M Manual Revised 09-06-19
O&M MANUAL
VALVOLINE INSTANT OIL CHANGE
9835 Michigan Road – Lot ‘1A’ of North Augusta
Carmel, Indiana 46032
Job #: VIOC.001
Date: 07/17/19
Revised: 09/06/19
Prepared by: Kyle Blanck
Reviewed by: Brian Cross, P.E.
160 West Carmel Drive, Suite 240
Carmel, Indiana 46032
Phone: 317-423-3305 Fax: 317-423-3306
TABLE OF CONTENTS
Section I: Manual
A. About the BMP
B. Contact Information for BMP owner
C. BMP Owner Acknowledgement Agreement
D. Right –of-Entry Statement
E. BMP Description & Operation
F. Maintenance Requirements
G. Site Drawings
H. Inspection Report
I. Spills, Reporting, Containment & Response Per 327 IAC 2-6.1-1
Section II: Appendix
A. BMP Owner Acknowledgment Agreement
B. Right-of-Entry Statement
C. Site Drawings
D. Stormwater Quality Data
E. Maintenance Guidelines
F. Inspection Report
SECTION I: MANUAL
A. About the BMP
A Water quality BMP is a device or methodology used to remove total suspended
solids (TSS) and free oil (TPH) from storm water run-off. This device or
methodology, with proper maintenance, will filter the storm water run-off, to help
prevent downstream contamination of streams and waterways. There are
multiple BMP’s that will be located on the subject site and will satisfy the post
construction stormwater quality for the proposed improvements.
B. Contact Information for the BMP Owner
i. ECC Michigan Road, LLC. (Ryan Conrad)
ii. Address: 725 E. 65th Street, Suite 300; Indianapolis, IN 46220
iii. Phone: 317-574-7448 ext. 101
iv. Email: rconrad@thomasenglish.com
C. BMP Owner Acknowledgement Agreement
See appendix A.
D. Right-of-Entry Statement
Allows the City of Carmel to inspect and maintain the BMP structure as
necessary. See appendix B.
E. BMP Description & Operation
The stormwater runoff from the site will discharge into a Stormwater Quality
Treatment unit manufactured by Hydro-International known as a First Defense®
Storm Water Quality Unit. This hydrodynamic separation method will capture the
required Total Suspended Solids (TSS) along with floating debris and
hydrocarbons prior to discharging into the existing master planned detention
pond system. We have selected a 4-foot diameter model with a maximum
Treatment Flow Rate for this sized structure 1.5 cfs. The calculated peak
discharge treatment rate for the proposed site improvements routed through the
4-foot diameter models is 0.68 cfs. First Defense® is an approved Stormwater
Quality Unit (SQU) in an off-line configuration and meets all the requirements of
the City of Carmel Stormwater Technical Standard Manual; therefore, the
Downstream Defender® Storm Water Quality Unit is an ideal fit for this
development.
The Connecting/Diversion Structure with Sump into the Downstream Defender
should be periodically cleaned and maintained as a BMP.
For more information concerning the BMP locations/structures, see appendix C.
F. Maintenance Requirements
i. See appendix E
ii. See appendix E
iii. See appendix E
iv. See appendix E
v. Property Management Company – Convenience Centers, LLC
G. Site Drawings
i. See appendix C
ii. See appendix C
iii. See appendix C
iv. See appendix C
H. Inspection Reports
The first inspection report is due one year after construction is completed, with
subsequent reports due each year within the same month of the initial report. If
there are any deficiencies found during the inspection, these should be
addressed. If the inspection report is not received within the month it is due, if
there are deficiencies which were not included in the report, or if any deficiencies
included in the report are not addressed in a timely manner, the BMP owner
faces enforcement action from the City. See appendix D for inspection form.
A written yearly inspection report must be submitted to:
City Hall – Department of Engineering
Attn: Stormwater Administrator
One Civic Square
Carmel, IN 46032
I. Spills, Reporting, Containment & Response Per 327 IAC 2-6.1-1
327 IAC 2-6.1-1 Applicability
Authority: IC 13-14-8-7
Affected: IC 13-11-2; IC 13-18-1; IC 13-18-3; IC 13-18-8; IC 13-18-17
Sec. 1. This rule applies to the reporting and containment of, and the response to
those spills of hazardous substances, extremely hazardous substances,
petroleum, and objectionable substances that are of a quantity, type, duration
and in a location as to damage the waters of the state. Nothing in this rule is
intended to affect reporting or clean-up requirements set forth by other Federal,
State, or Local laws. (Water Pollution Control Board; 327 IAC 2-6.1-1; filed Feb
25, 1997, 1:00 p.m.: 20 IR 1731; readopted filed Jan 10, 2001, 3:23 p.m.: 24 IR
1518; readopted filed Nov 21, 2007, 1:16 p.m.: 20071219-IR-327070553BFA)
"Spill" means any unexpected, unintended, abnormal, or unapproved dumping,
leakage, drainage, seepage, discharge, or other loss of petroleum, hazardous
substances, extremely hazardous substances, or objectionable substances. The
term does not include releases to impermeable surfaces when the substance
does not migrate off the surface or penetrate the surface and enter the soil.
Spill Emergency Contact
ECC Michigan Road, LLC.
ATTN: Ryan Conrad
Address: 725 E. 65th Street, Suite 300; Indianapolis, IN 46220
Phone: 317-574-7448 ext. 101
Email: rconrad@thomasenglish.com
SECTION II: APPENDIX
A. BMP Owner Acknowledgment Agreement
Owner Acknowledgement Agreement (“Agreement”)
For good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the undersigned owner (“Owner”) hereby submits this Operation and
Maintenance Manual (“Manual”) to the City of Carmel, Indiana (“City”) as a written
acknowledgement of Owner’s warranty and agreement to institute, maintain, and follow
the water quality Best Management Practices (“BMPs”) listed below, and to follow and
abide by the inspection schedule and maintenance activities listed in this Manual. The
Owner also hereby agrees to provide, at Owner’s cost, all additional maintenance, repair,
and/or replacement services reasonably necessary to maintain the function and longevity
of the BMPs from and including the date this Agreement is executed by Owner to and
including the date on which a new Agreement is filed with the City by another party who
assumes all of the obligations and responsibilities of Owner as set forth herein.
BMPs: ___________________________________________________
___________________________________________________
___________________________________________________
_______________________________ ________________________
Owner Signature Date
_______________________________ ______________________________
Printed Name Company
STATE OF INDIANA )
) SS:
COUNTY OF HAMILTON )
BEFORE ME, the undersigned, a Notary Public in and for said County and State,
personally appeared _________________________________ Owner subscribed and
sworn before this ____ day of __________________, ________.
______________________________ ______________________________
County of Residence Signature
______________________________
Commission Expiration Date
______________________________
Printed Name
B. Right-of-Entry Statement
RIGHT-OF-ENTRY STATEMENT
The current property owner and all heirs, successors, & assigns grants
permission and allows the City of Carmel and their employees, contracted
parties, and constituents the right-of-entry on 9835 Michigan Road (Lot ‘1A’ of
North Augusta & West Carmel Marketplace Block ‘H’) to inspect and maintain the
BMPs as noted on the Valvoline Instant Oil Change construction plans, Project
Number VIOC.001, First Defense Structure BMP, Diversion Manhole Structure
100, as referenced on drawing sheet numbers C3.1 and C7.2, certified: 07/17/19.
C. Site Drawings
2,077±
G
S
F
F.F.E. =
8
8
5.
2
5
EX. "NO BUILD" LINE
E
EXISTING POND "E"
NORMAL POOL = 874.0
100-YR STAGE = 881.14
WA
L
N
U
T
C
R
E
E
K
D
R
I
V
E
EX. CURB INLET
T.C.=883.3
GUT=882.8
INV.=879.25 (SW - 15" RCP)
EX. STORM MH
T.C.=882.94
EX. END SECTION
INV.=875.52 (W - 30" RCP)
EX. STORM MH
T.C.=883.35
INV.=876.48 (N - 30" RCP)
INV.=876.46 (E - 30" RCP)
INV.=877.50 (W - 18" RCP)
NEW 5'Ø STORM MANHOLE
(REMOVE/REPLACE EX. BEEHIVE INLET
AS NECESSARY PER CARMEL STDS.)
T.C.=883.15
INV.=877.55 (E - 18" RCP)
INV.=878.15 (W - 12" RCP)
INV.=878.10 (12" TO BMP)
INV.=878.0 (12" FROM BMP)
EX. 1
8"
R
C
P
MLAG DESIGN
TOP OF CURB GRADE = 883.37
TBM #1
ELEV.=883.55'
TBM #51
ELEV.=883.98'
EX. 30" RC
P
144'± O
F
8
"
Ø
S
D
R
3
5
PVC @
1
.
0
0
%
M
I
N
.
(CON
N
E
C
T
A
L
L
R
O
O
F
DRAIN
S
T
Y
P
.
)MICHIGAN ROAD
(US 421)WA
L
N
U
T
C
R
E
E
K
D
R
I
V
EWALNUT CREEK
DRIVE
57'± O
F
8
"
Ø
S
D
R
3
5
PVC @
1
.
0
0
%
M
I
N
.
(CON
N
E
C
T
A
L
L
R
O
O
F
DRAIN
S
T
Y
P
.
)
FL
FL
T
T
T
W
F FC
F
W FC
PROJECT NUMBER
DRAWING NUMBER
SHEET OF
SCALE:
DATE:
DWN BY:
CHKD. BY:CIVIL SITE GROUP, INC.GROUP, INC.PROF
E
SS
ION A L E NG INEERIND
IA NA
PE10910647
STATE OF
-oNREGIS TER
E
DBR IA N S CR
O
SSVIOC.001
C3.0LEXINGTON, KY 40509100 VALVOLINE WAYVALVOLINE INSTANT OIL CHANGEGRADING & DRAINAGE PLANVALVOLINE INSTANT OIL CHANGE9835 MICHIGAN ROAD - LOT '1A' of NORTH AUGUSTACARMEL, INDIANA 46032REVISION RECORD
07/17/2019
NOTE
REFER TO ARCHITECTURAL &
FOUNDATION PLANS FOR ALL
BUILDING DIMENSIONS.
TOPOGRAPHIC & BOUNDARY NOTE
UTILITY LOCATE NOTE
LEGEND:
18 " OF VERTICAL SEPARATION MUST
BE MAINTAINED FOR ALL UTILITY
CROSSINGS.
ALL CONCRETE PIPE JOINTS SHALL
BE CONTINUOUS O-RING RUBBER
GASKET CONFORMING TO ASTM C 443
FLOOD NOTE
UTILITY VALVE NOTE
STORM SEWER INLET NOTE
ALL STORM WATER INLETS & CATCH BASIN
CASTINGS SHALL BE LABELLED WITH
ENVIRONMENTAL MESSAGING "NO DUMPING,
DRAINS TO STREAM" CAST IN RAISED OR RECESSED
LETTERS AT A MIN. 1-INCH HEIGHT. A SYMBOL OF A
FISH SHALL ALSO BE CAST WITH THE LETTERS
NOTE
GRADING NOTES
GENERAL NOTES
CONTRACTOR TO KEEP EXISTING PAVEMENT SURROUNDING THE SITE
(I.E. MICHIGAN ROAD AND WALNUT CREEK DRIVE) "BROOM CLEAN" AND
FREE OF SOIL OR AGGREGATE THAT MIGHT BE BROUGHT OFF-SITE.
DEPENDING ON THE CONSTRUCTION SEASON, MOISTURE CONTENT AND
PROPERTIES OF THE SOILS ON SITE, CHEMICAL MODIFICATIONS AND/OR
LIME STABILIZATION MAY BE REQUIRED. SEE SHEET C9.0 FOR
SPECIFICATIONS.
ALL CONCRETE PIPE JOINTS SHALL BE CONTINUOUS O-RING RUBBER
GASKET CONFORMING TO ASTM C 443
CONTRACTOR (NOT THE PROJECT SITE OWNER) WILL BE RESPONSIBLE
FOR THE DISPOSAL OF ANY SOIL, MATERIALS, ETC. NO OFF-SITE
BORROWS OR STOCKPILES WILL BE NEEDED FOR THIS PROJECT.
CONTRACTOR SHALL SUBMIT PRECAST STORM SEWER STRUCTURE
SHOP DRAWINGS TO ENGINEER FOR REVIEW/APPROVAL PRIOR TO
MANUFACTURING.
EXISTING CONDITIONS NOTE
CONTRACTOR TO VERIFY ALL EXISTING
CONDITIONS, INCLUDING UTILITIES AND
DRAINAGE INFRASTRUCTURE BEFORE
COMMENCING WITH CONSTRUCTION.
CONTRACTOR TO NOTIFY ENGINEER OF
ANY DISCREPANCIES.
EXISTING RIGHT-OF-WAY NOTE
DAMAGE TO THE EXISTING RIGHT-OF-WAY SHALL BE
RESTORED/REPAIRED TO THE SATISFACTION OF THE CITY AT
THE COMPLETION OF THE PROJECT. THE CONTRACTOR IS
ENCOURAGED TO INSPECT THE RIGHT-OF-WAY WITH THE
CITY PRIOR TO THE START OF CONSTRUCTION TO DOCUMENT
THE EXISTING CONDITION OF THE RIGHT-OF-WAY.
BENCHMARK
MINIMUM FLOOD PROTECTION GRADE &
LOWEST ADJACENT GRADE DEFINITIONS
This project is located at the northeast corner of the intersection of Michigan Road and 98th Street in Hamilton County, City of Carmel, Indiana.
The site will consist of one (1) platted parcel totaling 0.98 +/- acres in size. There is no off-site or upstream acreage being routed through the
site. The site is currently vacant and is covered entirely by greenspace with existing utility and storm infrastructure surrounding the site. The
proposed improvements will consist of a new automobile service shop along with the associated utility and drainage infrastructure and new
hard surface for parking and ingress / egress.
Inlets and subsurface storm sewers will be used to convey storm water to the previously approved Walnut Creek Drive infrastructure. Storm
water will be routed to and collected by the North Augusta Arm #1-Crooked Creek Regulated Drain. Approved design plans (11/2009) for the
North Augusta Arm #1-Crooked Creek Regulated Drain are on file with the Hamilton County Surveyor's Office. The stormwater detention pond
system of West Carmel Marketplace includes the subject site with post-developed conditions in an updated analysis performed by Woolpert,
LLP in June, 2007 and reviewed / approved by the Hamilton County Surveyor's Office (Letter on File). The proposed improvements will
result in a curve number (CN) of 88.8 and a runoff coefficient (C) of 0.57 for the 0.98 acre outlot; therefore, substantially less than the
previously approved drainage master plan. Additional stormwater detention for the subject outlot is NOT required.
The allowable release rates for the 0.98 +/- acre subject site would be 0.1 cfs and 0.29 cfs for the 10-year and 100-year storm events
respectively. However, detention for the subject site is provided for within the West Carmel Marketplace Development. The developed 10-year
and 100-year release rates from the subject site (prior to detention) are XXX cfs and XXX cfs respectively. The required detention volume for
the subject site is provided for within the drainage master plan of West Carmel Marketplace (see drainage calculations referenced above
prepared by Woolpert). The applicable pages from the Approved Master Plan are in the Appendix of the drainage report for this project.
DRAINAGE SUMMARY
We have shown three (3) top-of-curb grades on Michigan Road and four curb/gutter grades along Walnut Creek Drive. The
lowest on each of two are 883.37 (Michigan Road T.O.C.) and 883.0 (Walnut Creek Drive gutter grade). The minimum
F.F.E. is to be at 15” above the Michigan Road Grade (883.37 - highest of the two), which is 884.62. The F.F.E. has been set
at 885.25. The local flood overflow route for the storm inlets is 883.50; therefore, one (1) foot above the aforementioned
elevation would be 884.50, which represents the MFPG . The 100-year elevation of the off-site pond is 881.14 and does not
come into play. Therefore, the MLAG/MFPG has been set at 884.50. The minimum F.F.E. shall be no less than 6" above
finished grade around the building, which results in a minimum F.F.E. of 885.0. The MFPG and MLAG are calculated
correctly and the set F.F.E. of 885.25 is in compliance with the STSM.
STRUCTURE DATA TABLE
ALL PROPERTY CORNER MONUMENTS SHOULD BE MARKED
PRIOR TO COMMENCING WITH CONSTRUCTION AND
PROTECTED DURING ALL CONSTRUCTION ACTIVITY.
PROPERTY CORNER MONUMENTS NOTE
STORM SEWER SYSTEM NOTE
ALL STORM SEWER INFRASTRUCTURE TO BE
CONSTRUCTED WITH THIS PROJECT SHALL
BE PRIVATELY OWNED AND MAINTAINED BY
CURRENT PROPERTY OWNER & ALL HEIRS,
SUCCESSORS, & ASSIGNS.
STRUCTURE DETAILS
DETAILS OF THE PROPOSED STORMWATER
QUALITY UNIT & THE DIVERSION MANHOLE
STRUCTURE ARE LOCATED ON SHEET C7.2.
BMP & DIVERSION PRELI
MI
NA
RY
NOT F
O
R
C
O
NST
R
U
CTI
O
N
PLAN NOTES:
T
FL
ENGINEER:
SURVEYOR:
OWNER:
ARCHITECT:
W
F
FC
JL 11/5/15 SUMP DEPTH
REVISION HISTORY
REV BY DATE DESCRIPTION
AA
Parts List
DESCRIPTIONSIZE (in)ITEM
I.D. PRECAST MANHOLE481
SEPARATION MODULE
2 LEDGER SUPPORT
3
INLET PIPE (BY OTHERS)244
OUTLET PIPE (BY OTHERS)245
6 FRAME AND COVER (OR GRATE) (ROUND)30
Rev.
Approved
Scale
C
Hydro International
CAD Ref:
Project
Drawn
Date
Title
Checked
No.
No.
Drawing
2014
Notes
Any warranty made by Hydro International only applies to those items supplied by it. Hydro International does not accept and expressly disclaims any responsibility or liability for any structure, plant or equipment (or the performance
thereof) designed, built, manufactured or supplied by any third-party. Hydro International has a policy of continuous product development and reserves the right to amend the specifications of any of its products or equipment at any
time. Hydro International expressly disclaims any liability for the performance of its equipment (or any part thereof) used or made subject to conditions outside of the conditions set forth in Hydro International's design specifications.
Hydro International owns the copyright in and to this drawing, which is supplied in confidence, and all intended recipients of the drawing, by their use thereof, agree to hold the drawing in confidence and not to use it for any purpose
other than for which it was supplied and not reproduce, in whole or in part, the drawing or any of the equipment or structures depicted therein, without prior written permission of Hydro International.
GENERAL ARRANGEMENT
HIGH CAPACITY
1/4" = 1'0"
F HC-MAX
AF HCS1
xx-xxxx
11/25/14
RC
14
1
6
4
5
5
3
2
3
2
GENERAL NOTES:
1. General Arrangement drawings only. Contact Hydro International for site specific fabrication drawings.
2. The diameter of the inlet & outlet pipes may be no more than 24".
3. Multiple inlet pipes possible (refer to project plans).
4. Inlet/outlet pipe angle can vary to align with drainage network (refer to project plans).
5. Peak flow rate and minimum height limited by available cover and pipe diameter.
6. Larger sediment storage capacity may be provided with a deeper sump depth.
PRODUCT SPECIFICATIONS:
A.The treatment system shall use an induced vortex to separate pollutants from stormwater runoff.
B.The treatment system shall fit within the limits of excavation (area and depth) as shown in the project plans and
will not exceed the dimensions for the design flow rates specified herein.
C.The treatment system shall remove greater than or equal to 90% of TSS based on the Target Particle Size
(TPS) of 106 microns and/or 80% of TSS based on the TPS of 230 microns at 0.7 cfs and 1.2 cfs, respectively.
D.The treatment system shall convey the Peak On-line Flow Rates of up to 18 cfs without causing upstream
surcharge conditions. Full-scale independent laboratory scour testing shall demonstrate effluent control of less
than or equal to 5 mg/L for all flows up to 200% of MTFR-106.
E.The treatment system shall be capable of capturing and retaining fine silt and sand size particles. Analysis of
captured sediment from full-scale field installations shall demonstrate particle sizes predominately in the
20-micron range
SUMP: 0 in / 0.00 ft
VARIES (SEE NOTE 5)
PREASSEMBLY REFERENCE: 41 1/2 in / 3.46 ft
PIPE INVERTS: 59 5/8 in / 4.97 ft
SECTION A-A
Inlet pipe(s) can
enter anywhere
within 240° arc.
BOTTOM OF INTERNALS: 27 in / 2.25 ft
A
PROJECT NUMBER
DRAWING NUMBER
SHEET OF
SCALE:
DATE:
DWN BY:
CHKD. BY:CIVIL SITE GROUP, INC.GROUP, INC.PROF
E
SS
ION A L E NG INEERIND
IA NA
PE10910647
STATE OF
-oNREGIS TER
E
DBR IA N S CR
O
SSVIOC.001
C7.2LEXINGTON, KY 40509100 VALVOLINE WAYVALVOLINE INSTANT OIL CHANGEGENERAL DETAILSVALVOLINE INSTANT OIL CHANGE9835 MICHIGAN ROAD - LOT '1A' of NORTH AUGUSTACARMEL, INDIANA 4603207/17/2019
REVISION RECORD
PAVEMENT MANHOLE
PLAN VIEW
STR.#100 - 5FT DIA. BMP DIVERSION MANHOLE
INV.-878.15 INV.-877.55
2' SUMP REQ'D.
STORM SEWER INLET NOTE
ALL STORM WATER INLETS & CATCH BASIN
CASTINGS SHALL BE LABELED WITH
ENVIRONMENTAL MESSAGING "NO DUMPING,
DRAINS TO STREAM" CAST IN RAISED OR RECESSED
LETTERS AT A MIN. 1-INCH HEIGHT. A SYMBOL OF A
FISH SHALL ALSO BE CAST WITH THE LETTERS.
CURB MANHOLE
D. Stormwater Quality Data
BMP SIZING
Simulation Basin Group Time Max Flow Max Volume Volume
hrs cfs in ft3
--------------------------------------------------------------------------------------
24HR BMP POST 12.05 0.68 0.595 2117
06/28/07
Exhibit 701-1: Curve Number Calculation for Water Quality Storm Event Water Quality Curve Number7072747678808284868890929496981000 102030405060708090100Percent ImperviousnessWater Quality Curve Number (CNwq)
PROPOSED CONDITIONS
Runoff Curve
Coefficient Number
Impervious Area =0.90 98 **Rooftop
Open Area =0.10 73.9 **Open Space (Good Condition)
Impervious Area =0.85 98.0 **Pavement
Crosby SIlt Loam (CrA - 99.1% Site) Type "C" Soil
Brookston Silty Clay Loam (Br - 0.9% Site) Type "B" Soil
ON SITE (PR1)
Impervious Area Open Area Impervious Area Total Total Composite Composite
Roof (ft^2)(ft^2)Pavement (ft^2)(ft^2)(Acres)"CN""C"
2100 16331 24199 42630 0.98 88.8 0.57
Overland flow seg. 1 Shallow Concentrated Flow
Basin Length S n T_t Length S Paved/Un Vel.T_t T_c
name (ft)%(min)(ft)%(P or U)(ft/s)(min)(min)
PR1 (SEE STORM SEWER SPREADSHEET)16
STORMWATER QUALITY
Impervious Area Total Total Percent CNwq
(ft^2)(ft^2)(Acres)Impervious (see Graph)
26299 42630 0.98 61.7%95.5
City of Indianapolis Stormwater Quality Unit (SQU)
Selection Guide
Pg. 1 1/23/18
Version 12.1
(Check
http://www.indy.gov/eGov/City/DPW/Business/Specs/Pages/UpdatedStormWaterManual.aspx
for current Selection Guide)
Table 1
Rate Based SQUs
Performance Matrix for Manufactured SQUs that remove 80% or more of Test Particles
PLEASE NOTE: All SQUs shall be configured as off-line units unless approved for on-line use.
On-line units must document the peak 10-year flow (per the Stormwater Design and
Construction Specification Manual) is less than the approved maximum10-yr flow rate.
Table 1
Manufactured
SQU SQU System Model
Max
Treatment
Flow
(cfs)
Max 10-yr
On-Line
Flow Rate
(cfs)
STC 450 0.37 N/A
STC 900 0.83 N/A
STC1200 0.83 N/A
STC 1800 0.83 N/A
STC 2400 1.38 N/A
STC 3600 1.38 N/A
STC 4800 2.30 N/A
STC 6000 2.30 N/A
STC 7200 3.22 N/A
STC 11000 4.59 N/A
STC 13000 4.59 N/A
Stormceptor®
2,3
STC 16000 6.43 N/A
4 Foot Diameter 1.3 N/A
6 Foot Diameter 3.58 N/A
8 Foot Diameter 7.35 N/A
Downstream
Defender® 2
10 Foot Diameter 12.85 N/A
VS30 0.28 N/A
VS40 0.58 N/A
VS50 1.01 N/A
VS60 1.60 N/A
VS70 2.35 N/A
VortSentry®2,3
VS80 3.28 N/A
1000 0.49 N/A
2000 1.00 N/A
3000 1.75 N/A
4000 2.76 N/A
Vortechs®2,3
5000 4.05 N/A
City of Indianapolis Stormwater Quality Unit (SQU)
Selection Guide
Pg. 4 1/23/18
Version 12.1
Manufactured
SQU SQU System Model
Max
Treatment
Flow
(cfs)
Max 10-yr
On-Line
Flow Rate
(cfs)
STWQ-12 22.97 N/A
STWQ-55 109.57 N/A
STWQ-105 211.16 N/A
STWQ-153 308.99 N/A
STWQ-200 403.80 N/A
STWQ-I 4.12 N/A
STWQ-II 1.95 N/A
STWQ-III 3.93 N/A
STWQ-IV 1.85 N/A
STWQ-V 1.85 N/A
STWQ-VI 3.75 N/A
STWQ-VII 1.76 N/A
WQU3620 0.6 N/A
WQU3640 1.28 N/A
WQU4220 0.70 N/A
WQU4240 1.49 N/A
WQU4820 0.92 N/A
WQU4840 1.95 N/A
WQU6020 1.18 N/A
Prinsco2
WQU6040 2.51 N/A
4 Foot Diameter 0.70 N/AFirst Defense
2,3 6 Foot Diameter 2.00 N/A
SWQU 36X20-B 0.75 N/A
SWQU 36X40-B 1.5 N/A
SWQU 42X20-B 0.8 N/A
SWQU 42X40-B 1.8 N/A
SWQU 48X20-B 1.1 N/A
SWQU 48X40-B 2.4 N/A
SWQU 60X20-B 1.4 N/A
Haviland2
SWQU 60X40-B 3.1 N/A
3 Foot Diameter 0.73 N/A
4 Foot Diameter 1.50 N/A
5 Foot Diameter 2.62 N/A
6 Foot Diameter 4.13 N/A
7 Foot Diameter 6.07 N/A
First Defense
High
Capacity1,2,3
8 Foot Diameter 8.49 N/A
2-4 0.49 2.12
3-6 1.35 5.83
3-8 1.93 8.34
4-8 2.77 11.97
5-10 4.84 20.91
6-12 7.64 33.00
6-13.75 9.1 39.31
7-14 11.2 48.38
Suntree
Nutrient
Separating
Baffle Box –
Hydro-
Variant
Technology
(NSBB-HVT)7-15 12.2 52.70
ICPR INPUT DATA – BMP SIZING
==========================================================================================
==== Basins ==============================================================================
==========================================================================================
Name: BMP Node: BMP Status: Onsite
Group: POST Type: SCS Unit Hydrograph CN
Unit Hydrograph: Uh484 Peaking Factor: 484.0
Rainfall File: Storm Duration(hrs): 0.00
Rainfall Amount(in): 0.000 Time of Conc(min): 16.00
Area(ac): 0.980 Time Shift(hrs): 0.00
Curve Number: 95.50 Max Allowable Q(cfs): 999999.000
DCIA(%): 0.00
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==== Nodes ===============================================================================
==========================================================================================
Name: BOUNDARY Base Flow(cfs): 0.000 Init Stage(ft): 100.000
Group: POST Warn Stage(ft): 100.000
Type: Time/Stage
Time(hrs) Stage(ft)
--------------- ---------------
0.00 100.000
12.00 100.000
24.00 100.000
==========================================================================================
==== Hydrology Simulations ===============================================================
==========================================================================================
Name: 24HR
Filename: P:\VIOC.001 - 9835 N Michigan Rd.Carmel.IN\Drainage\ICPR\Sims\24HR.R32
Override Defaults: Yes
Storm Duration(hrs): 24.00
Rainfall File: Scsii-24
Rainfall Amount(in): 1.00
Time(hrs) Print Inc(min)
--------------- ---------------
30.000 5.00
==========================================================================================
==== Routing Simulations =================================================================
==========================================================================================
Name: WAT-QUAL Hydrology Sim: 24HR
Filename: P:\VIOC.001 - 9835 N Michigan Rd.Carmel.IN\Drainage\ICPR\Sims\WAT-QUAL.I32
Execute: Yes Restart: No Patch: No
Alternative: No
Max Delta Z(ft): 1.00 Delta Z Factor: 0.00500
Time Step Optimizer: 10.000
Start Time(hrs): 0.000 End Time(hrs): 25.00
Min Calc Time(sec): 0.5000 Max Calc Time(sec): 60.0000
Boundary Stages: Boundary Flows:
Time(hrs) Print Inc(min)
--------------- ---------------
999.000 15.000
Group Run
--------------- -----
POST Yes
E. Maintenance Guidelines
Included Reference Documents
First Defense® - Operation & Maintenance Manual
First Defense® - High Capacity Details & Specifications
Site Specific First Defense Unit Details
Maintenance
Routine Maintenance:
In accordance with these requirements, maintenance will occur semi-annually (June &
December) or as needed. The BMP owner will also be required to perform any maintenance
specified at the City’s discretion. The following criteria shall be considered the minimum routine
maintenance to be performed:
1. Direct maintenance access for appropriate equipment must be provided to the First
Defense® structure. Remove sediment accumulated in the grit chamber at 24-inches
of depth. This measurement shall be taken using a stadia rod, sludge judge or similar
measuring device. All maintenance can be performed from one access point from the
surface with no requirements for Confined Space Entry. If required, entry into the SQU
should be considered an OSHA confined space and guidelines followed. Water and
sediment from the cleaning procedures should NOT be dumped into a sanitary sewer.
Disposal of all sediment must be in accordance with all federal, state and local
requirements.
2. The connecting manhole and diversion weir shall be kept clean of sediment, debris
and trash. Inspect and remove all sediment, debris and trash as needed. Water and
sediment from the cleaning procedures should NOT be dumped into a sanitary sewer.
Disposal of all sediment must be in accordance with all federal, state and local
requirements.
3. Cleanout of the First Defense® structure with a vacuum truck shall be performed as
needed.
4. See attached document from First Defense®.
5. Entry into the First Defense® unit is considered as an OSHA regulated confined space
in which all requirements shall be strictly adhered.
6. Greenspace and landscaping on site shall be maintained to keep grass cover dense
and vigorous. At a minimum, maintenance should include periodic mowing, occasional
spot reseeding, and weed control. Grass must never be mowed close to the ground.
Grass heights in the 4-6” range are recommended. Fertilization of grass shall be done
when needed to maintain the health of the grass, with care not to over-apply the
fertilizer.
7. Remove all trash and debris from storm sewers, inlets and manhole structures.
8. All waste should be disposed of by a certified waste hauler with documentation of the
source and approved disposal location. Water and sediment from the cleaning
procedures should NOT be dumped into a sanitary sewer. Disposal of all sediment
must be in accordance with all federal, state and local requirements.
9. Using a vacuum truck, remove all accumulated oil and water from the sump manholes.
Remedial Maintenance:
Remedial maintenance shall occur whenever deemed necessary either by the BMP owner or
the City of Carmel. (i.e. trash / debris removal, vacuum truck cleaning, etc…)
A. City of Carmel Responsibilities:
The City of Carmel will not be responsible for any required maintenance or associated
costs for the BMP.
BMP Inspection and Maintenance Requirements
BMP INSPECTION
REQUIREMENTS
MAINTENANCE
REQUIREMENTS
FEES REFERENCE
DOCUMENT(S)
First Defense®
4’ Diameter
Semi-annually (June
& December) by
owner and after every
rain event > 1 inch
over a 24hr-period.
Remove sediment
accumulated in the grit
chamber reaches 24-
inches of depth in the
sump. Refer to the
“Maintenance” section
of the O&M Manual.
Cleanout required a
minimum of once per
year.
Annual
Inspections
& fees as
required by
the City
Attached documents
from First Defense®.
City of Indianapolis
Stormwater Quality
Treatment Unit (SQTU)
Selection Guide.
Connecting
Manhole &
Diversion Weir
with Sump
Semi-annually (June
& December) by
owner and after every
rain event > 1 inch
over a 24hr-period or
as directed by City.
Remove sediment and
trash as needed.
Cleanout required a
minimum of once per
year.
N/A N/A
Responsibility
Owner to perform
semi-annual
inspections of BMP for
sedimentation levels.
The BMP owner is
responsible for all
maintenance and costs
associated there with.
Owner is
responsible
for annual
inspection
fees as
outlined in
Section
103.04.
Section 103.04 Pg 1-12
First Defense® INSPECTION CHECKLIST:
1. Maximum SQU sediment depth is 24-inches. Maintenance is required.
2. Sediment depth is done by taking 2 measurements with a sediment probe such as a
Sludge Judge® or similar measuring device; to determine the depth of sediment build-up within the
sump. Refer to Appendix A, Page 6 & Figure 5.
3. On-site Hydrocarbon spills (e.g. gasoline, oil, hydraulic fluids) that enter the subsurface
stormwater collection system and travel to the First Defense® SQU shall require immediate mitigation
by the owner. Absorbent pads or a vacuum truck should be utilized to remove the oily layer.
4. Entry into the First Defense® unit is considered as an OSHA regulated confined space in
which all requirements shall be strictly adhered.
5. Water and sediment generated from the cleaning procedure shall NOT be dumped into a
sanitary sewer. All waste should be disposed of by a certified waste hauler with documentation of the
source and approved disposal location. Disposal of all sediment must be in accordance with all Federal,
State, and Local requirements.
6. Inspection frequency of the First Defense® SQU shall occur every 6 months at a
minimum.
7. Off-line BMP configurations require inspection and maintenance of the connecting &
diversionary manhole structures/weirs.
8. Detail drawing of the First Defense® SQU is included in Appendix C & E of this O&M
Manual.
9. On-site Hydrocarbon spills (e.g. gasoline, oil, hydraulic fluids) that enter the subsurface
stormwater collection system and travel to the First Defense® SQU shall require immediate mitigation
by the owner. Absorbent pads or a vacuum truck should be utilized to remove the oily layer.
10. Disposal of all sediment must be in accordance with all Federal, State, and Local
requirements.
11. Cleanout of the First Defense® SQU shall occur once a year (minimum).
Storm Sewer Inspection and Maintenance Requirements
Storm Sewer
Infrastructure
INSPECTION
REQUIREMENTS
MAINTENANCE REQUIREMENTS
Storm Inlets,
Manholes, Storm
Cleanouts
Semi-annually (April
& October) by owner
and after every rain
event > 1 inch over
a 24hr-period.
More frequent inspections should be performed
in areas where there is higher potential for trash
or litter (e.g. truck docks, trench drains) and
during the Fall when leaves are present on the
ground. Catch basins should also be inspected
for sediment depth. A maximum sediment depth
equal to 6-inches or no greater than ¼ of the
pipe diameter is the point when the catch
basin/pipe should be cleaned of sediment and
debris.
Pipes, Swales,
Ditches
Monthly by owner
and after every rain
event > 1 inch over
a 24hr-period.
Swales/Ditches should be clear of high plant
growth (5-inches maximum); unobstructed by
buildings, fences, vehicles, landscape debris;
and have a uniform slope with 1.3% minimum
preferred. More frequent inspections should be
performed in areas where there is higher
potential for trash or litter (e.g. truck docks,
trench drains) and during the Fall when leaves
are present on the ground. Pipes should also be
inspected for sediment depth. A maximum
sediment depth equal to 6-inches or no greater
than ¼ of the pipe diameter is the point when the
pipe should be cleaned of sediment and debris.
Responsibility Owner to perform
inspections of storm
sewer infrastructure.
The owner is responsible for all maintenance
and costs associated therewith.
Operation and Maintenance Manual
First Defense® and First Defense®High Capacity
Vortex Separator for Stormwater Treatment
First Defense® Operation and Maintenance Manual
Hydro International (Stormwater), 94 Hutchins Drive, Portland ME 04102
Tel: (207) 756-6200 Fax: (207) 756-6212 Web: www.hydro-int.com
Table of Contents
3 First Defense® by Hydro International
- Introduction
- Operation
- Pollutant Capture and Retention
4 Model Sizes & Configurations
- First Defense® Components
5 Maintenance
- Overview
- Maintenance Equipment Considerations
- Determining Your Maintenance Schedule
6 Maintenance Procedures
- Inspection
- Floatables and Sediment Clean Out
8 First Defense® Installation Log
9 First Defense® Inspection and Maintenance Log
COPYRIGHT STATEMENT: The contents of this manual, including the graphics contained herein, are intended for the use of the recipient to whom the
document and all associated information are directed. Hydro International plc owns the copyright of this document, which is supplied in confidence. It
must not be used for any purpose other than that for which it is supplied and must not be reproduced, in whole or in part stored in a retrieval system or
transmitted in any form or by any means without prior permission in writing from Hydro International plc. First Defense® is a trademarked hydrodynamic
vortex separation device of Hydro International plc. A patent covering the First Defense® has been granted.
DISCLAIMER: Information and data contained in this manual is exclusively for the purpose of assisting in the operation and maintenance of Hydro
International plc’s First Defense®. No warranty is given nor can liability be accepted for use of this information for any other purpose. Hydro International
plc has a policy of continuous product development and reserves the right to amend specifications without notice.
Page | 2
First Defense® Operation and Maintenance Manual
I. First Defense® by Hydro International
Page | 3
Introduction
The First Defense® is an enhanced vortex separator
that combines an effective and economical stormwater
treatment chamber with an integral peak flow bypass. It
efficiently removes total suspended solids (TSS), trash and
hydrocarbons from stormwater runoff without washing out
previously captured pollutants. The First Defense® is available
in several model configurations (refer to Section II. Model
Sizes & Configurations, page 4) to accommodate a wide
range of pipe sizes, peak flows and depth constraints.
Operation
The First Defense® operates on simple fluid hydraulics. It is self-
activating, has no moving parts, no external power requirement
and is fabricated with durable non-corrosive components.
No manual procedures are required to operate the unit and
maintenance is limited to monitoring accumulations of stored
pollutants and periodic clean-outs. The First Defense® has
been designed to allow for easy and safe access for inspection,
monitoring and clean-out procedures. Neither entry into the
unit nor removal of the internal components is necessary for
maintenance, thus safety concerns related to confined-space-
entry are avoided.
Pollutant Capture and Retention
The internal components of the First Defense® have been
designed to optimize pollutant capture. Sediment is captured
and retained in the base of the unit, while oil and floatables
are stored on the water surface in the inner volume (Fig.1).
The pollutant storage volumes are isolated from the built-in
bypass chamber to prevent washout during high-flow storm
events. The sump of the First Defense® retains a standing
water level between storm events. This ensures a quiescent
flow regime at the onset of a storm, preventing resuspension
and washout of pollutants captured during previous events.
Accessories such as oil absorbent pads are available for
enhanced oil removal and storage. Due to the separation
of the oil and floatable storage volume from the outlet, the
potential for washout of stored pollutants between clean-outs
is minimized.
• Inlet options include surface grate or multiple inlet pipes
• Integral high capacity bypass conveys large peak flows without
the need for “offline” arrangements using separate junction
manholes
• Proven to prevent pollutant washout at up to 500% of its
treatment flow
• Long flow path through the device ensures a long residence
time within the treatment chamber, enhancing pollutant settling
• Delivered to site pre-assembled and ready for installation
Advantages
• Stormwater treatment at the point of entry into the drainage line
• Sites constrained by space, topography or drainage profiles
with limited slope and depth of cover
• Retrofit installations where stormwater treatment is placed on or
tied into an existing storm drain line
• Pretreatment for filters, infiltration and storage
Applications
Oil Max Oil
Storage Depth
Sediment
StorageSediment
Fig.1 Pollutant storage volumes in the First Defense®.
First Defense® Operation and Maintenance Manual
Hydro International (Stormwater), 94 Hutchins Drive, Portland ME 04102
Tel: (207) 756-6200 Fax: (207) 756-6212 Web: www.hydro-int.com
1
4
6
7
2
3
5
8
II. Model Sizes & Configurations
The First Defense® inlet and internal bypass arrangements are available in several model sizes and configurations. The components
of the First Defense®-4HC and First Defense®-6HC have modified geometries as to allow greater design flexibility needed to
accommodate various site constraints.
Page | 4
First Defense® Components
1. Built-In Bypass
2. Inlet Pipe
3. Inlet Chute
4. Floatables Draw-off Port
5. Outlet Pipe
6. Floatables Storage
a.b.
12
3
4
5
6
7
8
(not pictured)
Fig.2a) First Defense®-4 and First Defense®-6; b) First Defense®-4HC and First Defense®-6HC, with higher capacity dual internal
bypass and larger maximum pipe diameter.
All First Defense® models include the internal components that are designed to remove and retain total suspended solids (TSS),
gross solids, floatable trash and hydrocarbons (Fig.2a - 2b). First Defense® model parameters and design criteria are shown in
Table 1.
7. Sediment Storage
8. Inlet Grate or Cover
First Defense®
High Capacity
Model
Number
Diameter
Typical TSS Treatment
Flow Rates Peak
Online
Flow Rate
Maximum
Pipe
Diameter1
Oil Storage
Capacity
Typical
Sediment
Storage
Capacity2
Minimum
Distance from
Outlet Invert to
Top of Rim3
Standard
Distance
from Outlet
Invert to
Sump
Floor
NJDEP
Certified 106µm
(ft / m)(cfs / L/s)(cfs / L/s)(cfs / L/s)(in / mm)(gal / L)(yd3 / m3)(ft / m)(ft / m)
FD-3HC 3 / 0.9 0.84 / 23.7 1.60 / 45.3 15 / 424 18 / 457 125 / 473 0.4 / 0.3 2.0 - 3.5 / 0.6 - 1.0 3.71 / 1.13
FD-4HC 4 / 1.2 1.50 / 42.4 1.80 / 50.9 18 / 510 24 / 600 191 / 723 0.7 / 0.5 2.3 - 3.9 / 0.7 - 1.2 4.97 / 1.5
FD-5HC 5 / 1.5 2.34 / 66.2 2.94 / 82.1 20 / 566 24 / 609 300 / 1135 1.1 / .84 2.5 - 4.5 / 0.7 - 1.3 5.19 / 1.5
FD-6HC 6 / 1.8 3.38 / 95.7 4.73 / 133.9 32 / 906 30 / 750 496 / 1,878 1.6 / 1.2 3.0 - 5.1 / 0.9 - 1.6 5.97 / 1.8
FD-8HC 8 / 2.4 6.00 / 169.9 7.52 / 212.9 50 / 1,415 48 / 1219 1120 / 4239 2.8 / 2.1 3.0 - 6.0 / 0.9 -1.8 7.40 / 2.2
1Contact Hydro International when larger pipe sizes are required.
2Contact Hydro International when custom sediment storage capacity is required.
3Minimum distance for models depends on pipe diameter.
First Defense® Operation and Maintenance ManualPage | 5
III. Maintenance
Overview
The First Defense® protects the environment by removing a wide range of pollutants from stormwater runoff. Periodic removal of
these captured pollutants is essential to the continuous, long-term functioning of the First Defense®. The First Defense® will capture
and retain sediment and oil until the sediment and oil storage volumes are full to capacity. When sediment and oil storage capacities
are reached, the First Defense® will no longer be able to store removed sediment and oil. Maximum pollutant storage capacities are
provided in Table 1.
The First Defense® allows for easy and safe inspection, monitoring and clean-out procedures. A commercially or municipally owned
sump-vac is used to remove captured sediment and floatables. Access ports are located in the top of the manhole.
Maintenance events may include Inspection, Oil & Floatables Removal, and Sediment Removal. Maintenance events do not require
entry into the First Defense®, nor do they require the internal components of the First Defense® to be removed. In the case of
inspection and floatables removal, a vactor truck is not required. However, a vactor truck is required if the maintenance event is to
include oil removal and/or sediment removal.
Maintenance Equipment Considerations
The internal components of the First Defense®-HC have a centrally located circular shaft through which the sediment storage sump
can be accessed with a sump vac hose. The open diameter of this access shaft is 15 inches in diameter (Fig.3). Therefore, the nozzle
fitting of any vactor hose used for maintenance should be less than 15 inches in diameter.
Determining Your Maintenance Schedule
The frequency of clean out is determined in the field after installation. During the first year of operation, the unit should be inspected
every six months to determine the rate of sediment and floatables accumulation. A simple probe such as a Sludge-Judge® can be
used to determine the level of accumulated solids stored in the sump. This information can be recorded in the maintenance log (see
page 9) to establish a routine maintenance schedule.
The vactor procedure, including both sediment and oil / flotables removal, for a 6-ft First Defense® typically takes less than 30 minutes
and removes a combined water/oil volume of about 765 gallons.
Fig.3 The central opening to the sump of the First Defense®-HC is 15 inches in diameter.
15-in Maintenance Access
First Defense® Operation and Maintenance Manual
Hydro International (Stormwater), 94 Hutchins Drive, Portland ME 04102
Tel: (207) 756-6200 Fax: (207) 756-6212 Web: www.hydro-int.com
Inspection Procedures
1. Set up any necessary safety equipment around the access
port or grate of the First Defense® as stipulated by
local ordinances. Safety equipment should notify passing
pedestrian and road traffic that work is being done.
2. Remove the grate or lid to the manhole.
3. Without entering the vessel, look down into the chamber to
inspect the inside. Make note of any irregularities. Fig.4
shows the standing water level that should be observed.
4. Without entering the vessel, use the pole with the skimmer net
to remove floatables and loose debris from the components
and water surface.
5. Using a sediment probe such as a Sludge Judge®, measure
the depth of sediment that has collected in the sump of the
vessel.
6. On the Maintenance Log (see page 9), record the date, unit
location, estimated volume of floatables and gross debris
removed, and the depth of sediment measured. Also note
any apparent irregularities such as damaged components or
blockages.
7. Securely replace the grate or lid.
8. Take down safety equipment.
9. Notify Hydro International of any irregularities noted during
inspection.
Floatables and Sediment Clean Out
Floatables clean out is typically done in conjunction with
sediment removal. A commercially or municipally owned sump-
vac is used to remove captured sediment and floatables (Fig.5).
Floatables and loose debris can also be netted with a skimmer
and pole. The access port located at the top of the manhole
provides unobstructed access for a vactor hose and skimmer
pole to be lowered to the base of the sump.
Scheduling
• Floatables and sump clean out are typically conducted once
a year during any season.
• Floatables and sump clean out should occur as soon as
possible following a spill in the contributing drainage area.
Recommended Equipment
• Safety Equipment (traffic cones, etc)
• Crow bar or other tool to remove grate or lid
• Pole with skimmer or net (if only floatables are being removed)
• Sediment probe (such as a Sludge Judge®)
• Vactor truck (flexible hose recommended)
• First Defense® Maintenance Log
Fig.4 Floatables are removed with a vactor hose (First Defense
model FD-4, shown).
Page | 6
First Defense® Operation and Maintenance Manual
Floatables and sediment Clean Out Procedures
1. Set up any necessary safety equipment around the access
port or grate of the First Defense® as stipulated by
local ordinances. Safety equipment should notify passing
pedestrian and road traffic that work is being done.
2. Remove the grate or lid to the manhole.
3. Without entering the vessel, look down into the chamber to
inspect the inside. Make note of any irregularities.
4. Remove oil and floatables stored on the surface of the water
with the vactor hose (Fig.5) or with the skimmer or net (not
pictured).
5. Using a sediment probe such as a Sludge Judge®, measure
the depth of sediment that has collected in the sump of the
vessel and record it in the Maintenance Log (page 9).
6. Once all floatables have been removed, drop the vactor hose
to the base of the sump. Vactor out the sediment and gross
debris off the sump floor (Fig.5).
7. Retract the vactor hose from the vessel.
8. On the Maintenance Log provided by Hydro International,
record the date, unit location, estimated volume of floatables
and gross debris removed, and the depth of sediment
measured. Also note any apparent irregularities such as
damaged components, blockages, or irregularly high or low
water levels.
9. Securely replace the grate or lid.
- Regularly during first year of installation
- Every 6 months after the first year of installation
- Once per year, with sediment removal
- Following a spill in the drainage area
- Once per year or as needed
- Following a spill in the drainage area
Activity FrequencyInspection
Oil and Floatables
Removal
Sediment Removal
Maintenance at a Glance
NOTE: For most clean outs the entire volume of liquid does not need to be removed from the manhole. Only remove the
first few inches of oils and floatables from the water surface to reduce the total volume of liquid removed during a clean out.
Fig.5 Sediment is removed with a vactor hose (First Defense
model FD-4, shown).
Page | 7
First Defense® High Capacity
A Simple Solution for your Trickiest Sites
Product Profile
The First Defense® High Capacity is an enhanced vortex separator
that combines an effective stormwater treatment chamber with
an integral peak flow bypass. It efficiently removes sediment total
suspended solids (TSS), trash and hydrocarbons from stormwater
runoff without washing out previously captured pollutants. The First
Defense® High Capacity is available in several model configurations
to accommodate a wide range of pipe sizes, peak flows and depth
constraints (Table 1, next page).
Stormwater Solutions
hydro-int.com/firstdefensehc
How it Works
The First Defense® High Capacity has internal components designed to remove and retain gross debris, total suspended solids (TSS) and
hydrocarbons (Fig.1).
Contaminated stormwater runoff enters the inlet chute from a surface grate and/or inlet pipe. The inlet chute introduces flow into the chamber
tangentially to create a low energy vortex flow regime (magenta arrow) that directs sediment into the sump while oils, floating trash and debris
rise to the surface.
Treated stormwater exits through a submerged outlet chute located opposite to the direction of the rotating flow (blue arrow). Enhanced vortex
separation is provided by forcing the rotating flow within the vessel to follow the longest path possible rather than directly from inlet to outlet.
Higher flows bypass the treatment chamber to prevent turbulence and washout of captured pollutants. An internal bypass conveys infrequent
peak flows directly to the outlet eliminating the need for, and expense of, external bypass control structures. A floatables draw off slot functions
to convey floatables into the treatment chamber prior to bypass.
Components
1. Inlet Grate (optional)
2. Precast chamber
3. Inlet Pipe (optional)
4. Floatables Draw Off Slot
(not pictured)
5. Inlet Chute
6. Internal Bypass
7. Outlet pipe
8. Oil and Floatables Storage
9. Outlet chute
10. Sediment Storage Sump
Fig.1 The First Defense® High Capacity has internal components
designed to efficiently capture pollutants and prevent washout at
peak flows.
Applications
• Stormwater treatment at the point of entry into the drainage line
• Sites constrained by space, topography or drainage profiles
with limited slope and depth of cover
• Retrofit installations where stormwater treatment is placed on or
tied into an existing storm drain line
• Pretreatment for filters, infiltration and storage
• Inlet options include surface grate or multiple inlet pipes
• Integral high capacity bypass conveys large peak flows without
the need for “offline” arrangements using separate junction
manholes
• Proven to prevent pollutant washout at up to 450% of its
treatment flow
• Long flow path through the device ensures a long residence
time within the treatment chamber, enhancing pollutant settling
• Delivered to site pre-assembled and ready for installation
Advantages
Hydro International, 94 Hutchins Drive, Portland, ME 04102
Tel: (207) 756-6200 Fax: (207) 756-6212
Email: stormwaterinquiry@hydro-int.com Web: www.hydro-int.com
1
3
4
7
6
9
8
10
5
2
Verified by NJCAT and NJDEP
First Defense® High Capacity
Stormwater SolutionsHydro International, 94 Hutchins Drive, Portland, ME 04102
Tel: (207) 756-6200 Fax: (207) 756-6212
Email: stormwaterinquiry@hydro-int.com Web: www.hydro-int.com FDHCSS1703
Table 1. First Defense® High Capacity Design Criteria.
First Defense®
High Capacity
Model
Number
Diameter
Typical TSS Treatment
Flow Rates Peak
Online
Flow Rate
Maximum
Pipe
Diameter1
Oil Storage
Capacity
Typical
Sediment
Storage
Capacity2
Minimum
Distance from
Outlet Invert to
Top of Rim3
Standard
Distance
from Outlet
Invert to
Sump
Floor
NJDEP
Certified 110µm
(ft / m)(cfs / L/s)(cfs / L/s)(cfs / L/s)(in / mm)(gal / L)(yd3 / m3)(ft / m)(ft / m)
FD-3HC 3 / 0.9 0.84 / 23.7 1.06 / 30.0 15 / 424 18 / 457 125 / 473 0.4 / 0.3 2.0 - 3.5 / 0.6 - 1.0 3.71 / 1.13
FD-4HC 4 / 1.2 1.50 / 42.4 1.88 / 53.2 18 / 510 24 / 600 191 / 723 0.7 / 0.5 2.3 - 3.9 / 0.7 - 1.2 4.97 / 1.5
FD-5HC 5 / 1.5 2.34 / 66.2 2.94 / 83.2 20 / 566 24 / 600 300 / 1135 1.1 / .84 2.5 - 4.5 / 0.7 - 1.3 5.19 / 1.5
FD-6HC 6 / 1.8 3.38 / 95.7 4.23 / 119.8 32 / 906 30 / 750 496 / 1,878 1.6 / 1.2 3.0 - 5.1 / 0.9 - 1.6 5.97 / 1.8
FD-8HC 8 / 2.4 6.00 / 169.9 7.52 / 212.9 50 / 1,415 48 / 1219 1120 / 4239 2.8 / 2.1 3.0 - 6.0 / 0.9 -1.8 7.40 / 2.2
1Contact Hydro International when larger pipe sizes are required.
2Contact Hydro International when custom sediment storage capacity is required.
3Minimum distance for models depends on pipe diameter.
Sizing & Design
This adaptable online treatment system works easily with large pipes,
multiple inlet pipes, inlet grates and now, contains a high capacity bypass
for the conveyance of large peak flows. Designed with site flexibility in mind,
the First Defense® High Capacity allows engineers to maximize available site
space without compromising treatment level.
This simple online tool will recommend the best
separatror, model size and online/offline arrangement
based on site-specific data entered by the user.
Go to hydro-int.com/sizing to access the tool.
Sizing Calculator for Engineers
hydro-int.com/firstdefensehc
Fig 2. Works with multiple inlet pipes and grates
Fig 3. Maintenance is done with a vactor truck
Inspection and Maintenance
Nobody maintains our systems better than we do. To ensure optimal, ongoing
device performance, be sure to recommend Hydro International as a preferred
service and maintenance provider to your clients.
Call 1 (800) 848-2706 to schedule an
inspection and cleanout or learn more at
hydro-int.com/service
Variable inlet angles
First Defense® Installation Log
HYDRO INTERNATIONAL REFERENCE NUMBER:
SITE NAME:
SITE LOCATION:
OWNER: CONTRACTOR:
CONTACT NAME: CONTACT NAME:
COMPANY NAME: COMPANY NAME:
ADDRESS: ADDRESS:
TELEPHONE: TELEPHONE:
FAX: FAX:
INSTALLATION DATE: / /
MODEL SIZE (CIRCLE ONE): FD-4 FD-4HC FD-6 FD-6HC
INLET (CIRCLE ALL THAT APPLY): GRATED INLET (CATCH BASIN) INLET PIPE (FLOW THROUGH)
Hydro International (Stormwater), 94 Hutchins Drive, Portland ME 04102
Tel: (207) 756-6200 Fax: (207) 756-6212 Web: www.hydro-int.com
First Defense® Operation and Maintenance ManualNotes
PLAN VIEW
SECTION A-A
PARTS LIST
DESCRIPTIONSIZE (mm)SIZE (in)QTYITEM
I.D. PRECAST MANHOLE12004811
INTERNAL COMPONENTS
(PRE-INSTALLED)
12
FRAME AND COVER (ROUND)7503013
OUTLET PIPE (BY OTHERS)600 (MAX)24 (MAX)14
INLET PIPE (BY OTHERS)600 (MAX)24 (MAX)15
A A
ANY WARRANTY GIVEN BY HYDRO INTERNATIONAL WILL APPLY ONLY TO THOSE ITEMS
SUPPLIED BY IT. ACCORDINGLY HYDRO INTERNATIONAL CANNOT ACCEPT ANY RESPONSIBILITY
FOR ANY STRUCTURE, PLANT, OR EQUIPMENT, (OR THE PERFORMANCE THERE OF) DESIGNED,
BUILT, MANUFACTURED, OR SUPPLIED BY ANY THIRD PARTY. HYDRO INTERNATIONAL HAVE A
POLICY OF CONTINUOUS DEVELOPMENT AND RESERVE THE RIGHT TO AMEND THE
SPECIFICATION. HYDRO INTERNATIONAL CANNOT ACCEPT LIABILITY FOR PERFORMANCE OF ITS
EQUIPMENT, (OR ANY PART THEREOF), IF THE EQUIPMENT IS SUBJECT TO CONDITIONS OUTSIDE
ANY DESIGN SPECIFICATION. HYDRO INTERNATIONAL OWNS THE COPYRIGHT OF THIS DRAWING,
WHICH IS SUPPLIED IN CONFIDENCE. IT MUST NOT BE USED FOR ANY PURPOSE OTHER THAN
THAT FOR WHICH IT IS SUPPLIED AND MUST NOT BE REPRODUCED, IN WHOLE OR IN PART,
WITHOUT PRIOR PERMISSION IN WRITING FROM HYDRO INTERNATIONAL.
2019 HYDRO INTERNATIONAL
DO NOT SCALE DRAWING
UNLESS OTHERWISE SPECIFIED,
DIMENSIONS ARE IN INCHES.
TOLERENCES ARE:
FRACTIONS 1/16
DECIMALS .06
ANGLES 1
APPROX WEIGHT:
N/A
SHEET SIZE:
B
SHEET:
1 OF 1
DRAWING NO.:
12-34567-4FDHC_FDHC GA STD
NEXT ASSEMBLY:
12-34567-NEXT ASSY
94 Hutchins Drive
Portland, ME 04102
Tel: +1 (207) 756-6200
Fax: +1 (207) 756-6212
hydro-int.com
Rev:
-
Title
4-ft DIAMETER
FIRST DEFENSE HIGH CAPACITY
DRAWN BY:
ER
CHECKED BY:
MRJ
APPROVED BY
DATE:
5/31/2019
SCALE:
1:30
COMMENTS:
PROJECTION
MATERIAL:
GENERAL ARRANGEMENT
REVISION HISTORYREVBYDESCRIPTION DATE- FIRST RELEASE
5 1. MANHOLE WALL AND SLAB
THICKNESSES ARE NOT TO
SCALE.
2. CONTACT HYDRO
INTERNATIONAL FOR A BOTTOM
OF STRUCTURE ELEVATION
PRIOR TO SETTING FIRST
DEFENSE MANHOLE.
3. CONTRACTOR TO CONFIRM
RIM, PIPE INVERTS, PIPE DIA.
AND PIPE ORIENTATION PRIOR
TO RELEASE OF UNIT TO
FABRICATION.
PRODUCT SPECIFICATION:
1. PEAK HYDRAULIC FLOW: 18.0 cfs (510 l/s)
2. MIN SEDIMENT STORAGE CAPACITY: 0.7 cu. yd. (0.5 cu. m.)
3. OIL STORAGE CAPACITY: 191 gal. (723 liters)
4. MAXIMUM INLET/OUTLET PIPE DIAMETERS: 24 in. (600 mm)
5. THE TREATMENT SYSTEM SHALL USE AN INDUCED VORTEX TO
SEPARATE POLLUTANTS FROM STORMWATER RUNOFF.
6. OK110 110 MICRON 80% TSS REMOVAL 1.88 cfs (53.2 l/s) (NJDEP TEST PROTOCOL)
7. NJDEP CERTIFIED 80% TSS REMOVAL AT 1.5 cfs (42.4 l/s)
GENERAL NOTES:
1. General Arrangement drawings only. Contact Hydro International for site specific drawings.
2. The diameter of the inlet and outlet pipes may be no more than 24".
3. Multiple inlet pipes possible (refer to project plan).
4. Inlet/outlet pipe angle can vary to align with drainage network (refer to project plan.s)
5. Peak flow rate and minimum height limited by available cover and pipe diameter.
6. Larger sediment storage capacity may be provided with a deeper sump depth.
4
1
1
3 2 4
2
Pipe DetailsPIPEMATERIALLENGTHINV IN INV OUT SLOPEOUTLETft%INLET 1 ft %INLET 2 ft %INLET 3 ft %INLET 4 ft %.00 ft [.000 m]BOTTOM OF INTERNALS: .00 ft [.000 m]PREASSEMBLY REFERENCE:
4.97 ft [1.515 m]PIPE ELEV: (MINIMUM)
8.07 ft [2.460 m]T.O.S ELEV.: (MINIMUM)
RIM: VARIES
.00 ft [.000 m]SUMP ELEV:
5
HYDRO FRAME AND
COVER (INCLUDED)
GRADE RINGS BY OTHERS
AS REQUIRED
NOTE: ADDITIONAL HEIGHT MAYBE
REQUIRED DEPENDING ON PIPE SIZE
2.25 ft [.685 m]BOTTOM OF INTERNALS:
3.47 ft [1.057 m]PREASSEMBLY REFERENCE:
F. Inspection Report
First Defense® Inspection and Maintenance Log
Initials Depth of
Floatables
and Oils
Sediment
Depth
Measured
Volume of
Sediment
Removed
Site Activity and
Comments
Date
Hydro International (Stormwater), 94 Hutchins Drive, Portland ME 04102
Tel: (207) 756-6200 Fax: (207) 756-6212 Web: www.hydro-int.com Hydro International (Stormwater), 94 Hutchins Drive, Portland ME 04102
Tel: (207) 756-6200 Fax: (207) 756-6212 Web: www.hydro-int.com
INSPECTION & MAINTENANCE LOG
Diversion Structure
VALVOLINE INSTANT OIL CHANGE
SITE NAME: LOT '1A' of NORTH AUGUSTA & WCM BLOCK 'H'
JOB LOCATION: 9835 Michigan Rd; Carmel, IN 46032
INSPECTION DATE:
INSPECTED: Diversion Structure #100
Depth of Depth of
Floatables/Oil Sediment Site Activity &
Date Initials in Structure(in)in Structure(in)Comments
Inspector Signature Printed