HomeMy WebLinkAboutStormwater Operations and Maintenance ManualDrury Plaza Hotel
96th Street and US-31
Carmel, IN 46240
Stormwater
Operation and Maintenance Manual
Including:
Site Information
Operation and Maintenance
Inspection Checklist
Owner/Developer:
Drury Development Corporation
721 Emerson Rd., Suite 200
St. Louis, MO 63141
September 19, 2013
Proposed Hotel BMP Operations and Maintenance Manual
OWNER/OPERATOR
Drury Development Corporation
721 Emerson Rd., Suite 200
St. Louis, MO 63141
INSPECTIONS & CHECKLISTS
An inspection checklist is included to assist in the inspection of the stormwater best
management practices. These checklists must be completed and sent to The City of
Carmel Stormwater Department.
It is recommended that inspection and maintenance be performed quarterly following the
end of construction of the Aquaswirl.
After the 1st year, it is recommended that the BMP’s be inspected semi-annually.
The City of Carmel will require yearly inspection reports of the water quality BMPs. The
owner hereby grants the City of Carmel a right of entry for inspections and maintenance
as necessary. Vehicles may need to be vacated to allow for the City of Carmel to inspect
and maintain the Aquaswirl on site. The City of Carmel will give 24 hour notice to the
owner to have these parking spaces vacated. The first inspection will be due one year
after the Notice of Termination is submitted.
OWNER RESPONSIBILITY
It is the owner’s responsibility to perform and/or pay for inspections and maintenance
costs as recommended above.
In the event that an association is established to maintain the BMP, the owner must notify
the City of Noblesville regarding the transfer of responsibility.
OWNER ACKNOWLEDGEMENT
Signature Date
Printed
Aquaswirl
There is one Aquaswirl located on-site. It is located to the southeast of the site, close to
Parkwood Crossing.
Aquaswirl units are designed to remove sediment, debris, and free oil from entering the sewer
system. After construction the Aquaswirl should be inspected every six months and cleaned as
needed or once a year regardless of whether it has reached full pollutant storage capacity. See the
attached O&M Manual for the Aquaswirl for complete details of inspection and cleaning.
WET DETENTION POND
One wet detention pond is located off site to the east. The wet detention pond is
located across Parkwood Crossing Drive.
Detention ponds function more effectively when they are regularly inspected and
maintained. Routine maintenance of the pond includes mowing of the embankment and
buffer areas and inspection for erosion and nuisance problems (e.g. burrowing animals,
weeds, odors) (SEWRPC, 1991). Trash and debris should be removed routinely to
maintain an attractive appearance and to prevent the outlet from becoming clogged. In
general, detention ponds should be inspected after every storm event. The embankment
and emergency spillway should also be routinely inspected for structural integrity,
especially after major storm events. Embankment failure could result in severe
downstream flooding. The outlet structures should be checked routinely and cleaned
when necessary. When any problems are observed during routine inspections, necessary
repairs should be made immediately. Failure to correct minor problems may lead to larger
and more expensive repairs or even to pond failure. Typically, maintenance includes
repairs to the embankment, emergency spillway, inlet, and outlet; removal of sediment;
and control of algal growth, insects, and odors (SEWRPC, 1991). Large vegetation or
trees that may weaken the embankment should be removed. Periodic maintenance may
also include the stabilization of the outfall area (e.g. adding rip-rap) to prevent erosive
damage to the embankment and the stream bank. In most cases, sediments removed from
wet detention ponds are suitable for landfill disposal; however, where available, on-site
use of removed sediments for soil amendment will reduce maintenance costs.
7260 SHADELAND STATION
INDIANAPOLIS, IN 46256-3957
TEL 317.547.5580 FAX 317.543.0270
www.structurepoint.com
1"=100'
09/19/2013
ILT
2013.01784
System Maintenance
3
Sediment inspection
using a stadia rod
Inspection
All AquaShield™ products can be inspected from the surface, eliminating the
need to enter the systems to determine when cleanout should be performed.
In most cases, AquaShield™ recommends a quarterly inspection of the
Stormwater Treatment Systems for the first year of operation to develop an
appropriate schedule of maintenance.
Based on experience of the system’s first year in operation, we recommend that
the inspection schedule be revised to reflect the site-specific conditions
encountered. Typically, the inspection schedule for subsequent years is reduced
to semi-annual inspection.
Aqua-Swirl™ Maintenance
The Aqua-Swirl™ has been designed to minimize and simplify the inspection and
maintenance process. The system can be inspected and maintained completely
from the surface, thereby eliminating the need for confined space entry.
Furthermore, the entire structure (specifically, the floor) is accessible for visual
inspection from the surface. There are no areas of the structure that are blocked
from visual inspection or periodic cleaning.
Inspection of any free-floating oil and floatable debris can be directly observed
and maintained through the manhole access provided directly over the swirl
chamber.
Aqua-Swirl™ Inspection Procedure
To inspect the Aqua-Swirl™, a hook is needed to remove
the manhole cover. AquaShield™ provides a customized
manhole cover with our logo to make it easy for
maintenance crews to locate the system in the field. We
also provide a permanent metal information plate attached
inside the access riser, which provides our contact
information, the Aqua-Swirl™ model size, and serial
number.
System Maintenance
4
Vacuum truck cleans the
Aqua-Swirl™
The only tools needed to inspect the Aqua-Swirl™ system are a flashlight and a
measuring device such as a stadia rod or pole. Given the tremendous
accessibility provided, floating oil and debris can be observed directly from the
surface. Sediment depths can easily be determined
by lowering a measuring device to the top of the
sediment pile and to the surface of the water.
When the sediment pile is within 30 to 36 inches of
the water surface, the system should be
maintained.
It should be noted that in order to avoid
underestimating the volume of sediment in the
chamber, the measuring device must be carefully
lowered to the top of the sediment pile. The finer
sediment at the top of the pile, typically offers less
resistance to the measuring device than the larger
particles.
Aqua-Swirl™ Cleanout Procedure
Clean out of the Aqua-Swirl™ is simple. Free-floating oil
and floatable debris can be observed and removed directly
through the 30-inch service access provided.
A vacuum truck can be used to remove the accumulated
sediment and debris. It is important to note that the entire
sediment storage area can be reached with a vacuum hose
from the surface (reaching all the sides).
Disposal of the material is typically treated in the same
fashion as catch basin cleanouts. AquaShield™
recommends that all materials removed be handled and
disposed of in accordance with local and state requirements.
An “Inspection and Maintenance Manual” is provided with each Aqua-Swirl™
system for more detailed maintenance procedures. On the following page, you
will find sample Inspection Data Sheets.
System Maintenance
5
Aqua-Swirl™ Inspection Data Sheet
Location:
Date Inspector
Name
Distance to
Sediment
(in.)
Distance to
Water
(in.)
Floatable
Layer
Thickness
(describe)
Maintenance
Required?
(yes/no)
System Maintenance
6
Aqua-Swirl™ Maintenance Data Sheet
Inspector: Date:
Location: Time:
INSPECTION
General Site Condition
Visible Evidence of Spills/ Releases (oils, grease, fuels, paints, chemicals):
Visible Evidence of Heavy Sediment Deposition:
Swirl
Condition of Swirl:
Condition of Baffle:
Distance to Sediment:
Distance to Water:
**Note: If sediment is less than 30 to 36 inches below water surface, sediment
should be removed.
CONTAMINATION REMOVAL DATA
Floating Oil and Debris
Approx. Volume:
Description:
Elapsed Removal Time:
Sediment
Approx. Volume:
Description:
Elapsed Removal Time:
Other Comments
Aqua-Swirl™
Model
Swirl
Chamber
Diameter
Water Quality
Treatment
Flow2
Oil/Debris
Storage
Capacity
Sediment
Storage
Capacity
(ft.)(cfs)(gal)(ft3)
On/Offline CFD1
812
AS-33.2510161.811020
AS-44.2512183.219032
AS-55.0012244.427045
AS-66.0014306.339065
AS-77.0016368.654090
AS-88.00184211.2710115
AS-99.00204814.2910145
AS-1010.0225417.51130180
AS-1212.0244825.21698270
AS-XXCustom---->26----
*Higher water quality treatment flow rates can be designed with multiple swirls.
1)
2)
10
Aqua-Swirl™ Sizing Chart (English)
ThedesignandorientationoftheAqua-Filter™generallyentailssomedegreeofcustomization.For
assistanceindesignandspecificsizingusinghistoricalrainfalldata,pleaserefertoanAquaShield™
representativeorvisitourwebsiteatwww.AquaShieldInc.com.CADdetailsandspecificationsareavailable
upon request.
Maximum
Stub-Out Pipe
Outer Diameter
(in.)
The Aqua-Swirl™ConveyanceFlowDiversion(CFD)providesfulltreatmentofthe
"firstflush,"whilethepeakdesignstormisdivertedandchanneledthroughthemain
conveyance pipe. Please refer to your local representative for more information.
Many regulatory agencies areestablishing "waterquality treatment flow rates"fortheir
areasbasedontheinitialmovementofpollutantsintothestormdrainagesystem.The
treatmentflowrateoftheAqua-Swirl™systemisengineeredtomeetorexceedthe
localwaterqualitytreatmentcriteria.This "waterqualitytreatmentflowrate"
typically represents approximately 90% to 95% of the total annual runoff volume.
AS-22.501.137
Company Name:
Street Address:
City, State, Zip:
Contact:
Office Phone:
Mobile Phone:
Pager:
Date of cleaning:(Next inspection should be 3 months from this date for the first year).
Time of cleaning:
Date of next inspection:
Floatable debris present (Y/N)?
Oil present (Y/N)?Oil depth (inches):
Any structural damage?YNWhere?
Any evidence of structural wear?YNWhere?
Odors present?YNDescribe:
Any plugging?YNDescribe:
Activity Log
Structural Conditions and Comments
Maintenance Company Information
Aqua-SwirlTM O and M Manual
Page 1
Additional Comments and/or Actions to Be TakenTime Frame
NOTES
Aqua-SwirlTM O and M Manual
Page 2
Date Construction Started:
Date Construction Ended:
Activity 123456789101112
Inspect and Clean as Needed XXXX
Inspect Bypass Structures XXXX
(if applicable) and Maintain
As Needed
Clean System*X*
* The Aquaswirl should be cleaned once a year regardless of whether it has reached full pollutant
storage capacity. In addition, the system should be cleaned at the end of construction regardless
of whether it has reach full pollutant storage capacity.
Activity 123456789101112
Inspect and Clean as Needed XXXX
Inspect Bypass Structures XXXX
(if applicable) and Maintain
As Needed
Clean System*X*
* The Aquaswirl should be cleaned once a year regardless of whether it has reached full pollutant
storage capacity.
Activity 123456789101112
Inspect and Clean as Needed*XX
Inspect Bypass Structures*XX
(if applicable) and Maintain
As Needed
Clean System*XX
*If the Aquaswirl did not reach full sediment or floatable pollutant capacity in the First Year Post-Construction,
the system can be inspected every six months and cleaned once annually.
If the Aquaswirl reached full sediment or floatable pollutant capacity in less than 12 months in the First Year
Post-Construction, the system should be inspected as frequently as past history warrants (once every six months minimum)
and cleaned as needed. The Aquaswirl should be cleaned annually regardless of whether it
reaches its sediment or floatable pollutant capacity. External bypass structures, if present, should be inspected whenever the
Aquaswirl is inspected and maintained as needed.
Aquaswirl
TABULAR MAINTENANCE SCHEDULE
Second and Subsequent Years Post-Construction
Month
During Construction
Month
First Year Post-Construction
Month
Aqua-SwirlTM O and M Manual
Page 3
TABULAR MAINTENANCE SCHEDULE (WET POND)
Date Construction Started:
Date Construction Ended:
During Construction
Month
Activity 1 2 3 4 5 6 7 8 9 10 11 12
Inspect and Clean as Needed X X X X
Inspect Outfall Structure X X X X
and Maintain As Needed
Clean Pond* X*
* The Pond should be cleaned once it has reached full pollutant storage capacity.
First Year Post-Construction
Month
Activity 1 2 3 4 5 6 7 8 9 10 11 12
Inspect and Clean as Needed X X X X
Inspect Outfall Structure X X X X
and Maintain as Needed
Clean Pond* X*
* The Pond should be cleaned once it has reached full pollutant storage capacity.
Second and Subsequent Years Post-Construction
Month
Activity 1 2 3 4 5 6 7 8 9 10 11 12
Inspect and Clean as Needed* X X
Inspect Outfall Structure X X
and Maintain as Needed
Clean System* X X
*The Pond should be cleaned once it has reached full pollutant storage capacity.