HomeMy WebLinkAboutOM Report1
Operation and Maintenance Manual
Stormwater Treatment System
for
Golf Training/Tennis Pavilion
Carmel, Indiana
TABLE OF CONTENTS
1.0 Introduction ...................................................................................... 1
1.1 Project Description ............................................................................................ 1
1.2 Purpose and Performance ................................................................................ 2
2.0 Water Quality Maintenance .............................................................. 2
2.1 Maintenance and Inspections - Mechanical BMP- Aqua Swirl Units .................. 2
2.2 Maintenance and Inspections - Underground Detention System (UGD) ............ 3
2.3 Documentation .................................................................................................. 4
3.0 Owner’s Acceptance ........................................................................ 4
Owner Acknowledgement Agreement........................................................................... 5
Appendix A – Site Specific Information
Utility Plan Sheet C5-1
Aqua-Swirl Detail
Appendix B – Operations and Maintenance Manual
Aqua-Swirl O&M (Water Quality Unit)
Appendix C – Inspection Checklist
54-Inch CMP Underground Detention Chamber System Inspection Checklist
o Inlet Structure 702A Inspection Checklist
o Outlet Control Structure 702 Inspection Checklist
Aqua-Swirl Water Quality System Maintenance
Structure 703 Inspection Checklist
Trench Drain Inlet – Maintenance Inspection Checklist
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1.0 Introduction
The City of Carmel has adopted a policy in compliance with the National Pollutant
Discharge Elimination System (NPDES) stormwater permit to control and improve the
water quality of stormwater runoff. The water quality management program is based on
the performance of approved structural Best Management Practices (BMP) to remove
80% of total suspended solids (TSS) from the first 1-inch of storm water runoff. Design
requirements and parameters may be found in the City of Carmel Stormwater Technical
Standards Manual.
1.1 Project Description
The Golf Training and Tennis Pavilion project consists of the construction of a 3,026
sq.ft. golf training building and a 1,378 sq.ft. tennis observation pavilion with restrooms.
The proposed improvements will only disturb 1.67 acres of the larger 60+ acre parcel
The project involves, but is not limited to, the following:
Constructing the golf training building at the existing driving range
Removing/rerouting the golf cart path to the new golf training building
Constructing the tennis observation pavilion over the southeast corner over the
existing parking lot
Installation of new water and sanitary services to the new buildings
As part of this project’s stormwater management, a hydrodynamic separator and
underground detention is proposed for stormwater treatment prior to discharging to the
existing 18-inch outlet to the ditch on the east side of the site. Structure 703 will be an
Aqua Swirl XC-3 water quality unit. This Ditch is the primary stormwater outlet point for
the site.
1.2 Purpose and Performance
In order to achieve the 80% target removal rate of TSS from the stormwater runoff
associated with the proposed improvements, flow through BMPs were selected based on
the physical site characteristics, cost, and the ability to meet the water quality treatment
flow rate to be treated per City of Carmel requirements. The benefits of this type of BMP
is a very high pollutant removal rate and ability to address floatables.
The proposed new BMP is located on the downstream end adjacent to the trench drain
along the north end of the proposed tennis courts prior to discharging runoff to the
underground detention 54-inch CMP. The proposed BMP has been sized to treat the
runoff for the site according to the City of Carmel Stormwater Technical Standards
Manual. (See Calculations and Exhibits in the Drainage Report)
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2.0 Water Quality Maintenance
As part of the Water Quality program, the City of Carmel also requires a maintenance and
inspection program by the Owner for each type of BMP.
2.1 Maintenance and Inspections - Mechanical BMP- Aqua Swirl Units
Routine inspections, maintenance, and the costs necessary for the maintenance and
repair of the BMPs are the responsibility of the owner. The following are the
recommended inspection items and timeframes for the Aqua Swirl units.
Inspection Frequency: The manufacturer recommends quarterly inspections;
however, City of Carmel Engineering Department
requires annual inspection reports to be submitted to the
city, in the same month as the initial inspection.
Maintenance and Inspections (Mechanical BMP- Aqua Swirl Units)
Inspection Item:
Sediment – Sediment is to be removed when inspection
reveals a top of sediment depth within 6 in. of the dry-
weather water surface elevation in the structure. Sediment
depths can be easily determined by measuring the distance from
the top of the manhole to the dry water surface elevation and then
measuring the distance from the top of the manhole to the top of
the sediment pile. This can be done with a steel tape or stadia
rod. The system should be pumped clean using a high velocity
vacuum truck.
Free-floating oil and floatable debris – use a high velocity
vacuum truck to clean the pollutants. After recording the
measurements on the Inspection Data Sheet (attached in
Appendix B), the vacuum hose is lowered through the access
opening and the floating debris. The oil may be best removed by
using an absorbent pad. Usually, confined space entry can be
avoided by inspecting from the manhole entrance and cleaning the
system by using a vacuum hose.
Inspection Item:
Foliage or Clogging of Castings: All inlet and dry well open grate
castings shall be inspected monthly and after each rainfall event.
More frequent inspections should occur after outdoor events
located near inlets and during the autumn months if leave foliage
could result in clogging the casting.
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2.2 Maintenance and Inspections – Underground Detention System (UGD)
Routine inspections, maintenance, and the costs necessary for the maintenance and
repair of the underground detention system (UGD) components are the responsibility of
the owner. Inspection of the 54 - inch CMP Underground Detention System is important
for overall operation efficiency of the stormwater management system, stormwater
quality, as well as identifying potential problems. The 54 - inch CMP Underground
Detention System is designed for easy access for inspection and maintenance. The
following are the recommended inspection items and timeframes for the 54 - inch CMP
system.
Inspection Frequency: The manufacturer recommends the underground system
should be inspected every 6 months during the first year
of operation, and at least once per year prior to the rainy
season (typically April). Adjust the inspection interval
based on previous observations of sediment
accumulation and high-water elevations; however, City of
Carmel Engineering Department requires annual
inspection reports to be submitted to the city, in the same
month as the initial inspection.
The 54 - inch CMP Underground Detention System should be inspected and maintained
as follows:
Conduct jetting annually or when inspection shows that maintenance is
necessary.
Remove sediment and debris from subsurface chambers through the inspection
port manholes near the inlet and outlet structures by hand or with a vacuum
truck.
Outlet Structure 702: Sediment and trash may accumulate in front of the outlet
orifice. These regions should be inspected carefully to ensure the outlet orifice is
not clogged with sediment or debris.
Inlet Sump Structure 702A: For structures with sump structures, inspect and
clean sump structures at least twice a year, once before the rainy season.
Sediments and debris shall be removed by hand or with a vacuum truck when
sediment depths exceed ¼ of the pipe diameter with a maximum of 6”.
Sediments and waste shall be disposed of in accordance with the City of Carmel
and any applicable state, and/or federal requirements.
Sediments should be tested for toxicants in compliance with current disposal
requirements if land uses in the catchment include commercial or industrial
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zones or if indications of pollution are noticed. Secure all manhole covers and
seat upon completion of inspection. Disposal of all sediments shall be in
accordance with all federal, state, and local requirements.
If the detention system, inlet dispersion manifold structure, outlet control structure
or pipes are found to need replacement, it is the owner’s responsibility to supply
and replace.
Entry into any manholes and subsurface pipes should be considered an OSHA
confined space and the appropriate guidelines should be followed.
Additional information on inspection and maintenance of the 54 - inch CMP
Underground Detention System is summarized in Appendix C. Checklists should,
at a minimum, address the items identified in this document.
2.3 Documentation
The owner is required to maintain completed inspection reports/records and update the
operations and maintenance plan for the BMP. The inspection reports shall be submitted
to the City of Carmel Engineering Department annually and made available to the City
upon request. The first 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.
3.0 Owner’s Acceptance
Owner Information:
Brad Frawley
Woodland Country Club
100 Woodland Lane
Carmel, IN 46032
317-695-5522
iutraveler@icloud.com
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APPENDIX B
Operation and Maintenance Manual
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APPENDIX C
Inspection Checklist
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54 - Inch CMP Underground Detention Chamber System Inspection Checklist
Site Name:
Owner Changed Since Last Inspection? Y or N
Owner Name, Address, and Phone Number:
Location:
Date:
Time:
Inspector Name:
Underground Detention
Chambers
Satisfactory Comments
Structure (Inspect at least once per year before rainy season)
1. Sediment/Litter
accumulation? Y or N
2. Structure free from
damage? Y or N
3. Control Structure
Orifice/Weir free from
damage?
Y or N
Maintenance Item
1. Sediment/Litter
accumulation? Y or N
2. Structure free from
damage? Y or N
Note: Sediments and debris in chambers shall be removed by hand and with a vacuum
truck with a special attachment that sprays and vacuums sediment at the same time.
Sediments and waste shall be disposed of in accordance with the City of Carmel and any
applicable state, and/or federal requirements.
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Additional Comments and Actions to be Taken: Timeframe:
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Inlet Structure 702A Inspection Checklist
Site Name:
Owner Changed Since Last Inspection? Y or N
Owner Name, Address, and Phone Number:
Location:
Date:
Time:
Inspector Name:
Structure
Maintenance Item
Satisfactory Comments
Inlet Control Structure (Inspect at least once per year before rainy season)
1. Sediment/Litter
accumulation? Y or N
2. Structure free from
damage? Y or N
Storage System Maintenance
1. Sediment/Litter
accumulation? Y or N
2. Structure free from
damage? Y or N
Note: Sediments and debris in chambers and outlet control structure shall be removed
by hand or with a vacuum truck. Sediments and waste shall be disposed of in accordance
with the City of Carmel and any applicable state, and/or federal requirements .
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Additional Comments and Actions to be Taken: Timeframe:
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Outlet Control Structure 702 Inspection Checklist
Site Name:
Owner Changed Since Last Inspection? Y or N
Owner Name, Address, and Phone Number:
Location:
Date:
Time:
Inspector Name:
Outlet Control Structure
Maintenance Item
Satisfactory Comments
Outlet Control Structure (Inspect at least once per year before rainy season)
1. Sediment/Litter
accumulation? Y or N
2. Structure free from damage? Y or N
3. Structure Weir and orifice
free from damage? Y or N
Maintenance Item
1. Sediment/Litter
accumulation? Y or N
2. Structure free from damage? Y or N
Note: Sediments and debris in chambers and outlet control structure shall be removed
by hand or with a vacuum truck. Sediments and waste shall be disposed of in accordance
with the City of Carmel and any applicable state, and/or federal requirements .
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Additional Comments and Actions to be Taken: Timeframe:
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Aqua-Swirl Xcelerator Water Quality System Inspection Checklist: Str 703
Site Name:
Owner Changed Since Last Inspection? Y or N
Owner Name, Address, and Phone Number:
Location:
Date:
Time:
Inspector Name:
Aqua-Swirl
Maintenance Item
Satisfactory Comments
Aqua-Swirl (Inspect at least once per year before rainy season)
1. Sediment/Litter
accumulation? Y or N
2. Structure free from
damage? Y or N
3. Weir free from damage? Y or N
Note: Sediments and debris in the Aqua-Swirl shall be removed by hand or with a
vacuum truck. Sediments and waste shall be disposed of in accordance with City of
Carmel and any applicable state, and/or federal requirements .
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Additional Comments and Actions to be Taken: Timeframe:
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Trench Drain Inlet - Maintenance Inspection Checklist
Site Name:
Owner Changed Since Last Inspection? Y or N
Owner Name, Address, and Phone Number:
Location/ Structure #:
Date:
Time:
Inspector Name:
Maintenance Item Satisfactory Comments
Castings (Inspect monthly or after rain event)
1. Debris accumulation
at casting? Y or N
2. Castings free from
damage? Y or N
Inlets (Inspect at least once per year before rainy season)
1. Sediment/Litter
accumulation? Y or N
2. Structure free from
damage? Y or N
Note: Sediments and debris in inlets and catch basins shall be removed by hand or with
a vacuum truck. Sediments and waste shall be disposed of in accordance with the City
of Carmel and any applicable state, and/or federal requirements .
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Inlet, Manhole, and Sump Structure Maintenance
Site Name:
Owner Changed Since Last Inspection? Y or N
Owner Name, Address, and Phone Number:
Location/ Structure #:
Date:
Time:
Inspector Name:
Maintenance Item Satisfactory/
Unsatisfactory
Comments
Castings (Inspect monthly or after rain event)
1. Debris accumulation at
casting?
2. Castings free from
damage?
Inlets (Inspect at least once per year before rainy season)
1. Sediment/Litter
accumulation?
2. Structure free from
damage?
Manholes (Inspect and clean at least once per year before rainy season)
1. Sediment/Litter
accumulation?
2. Structure free from
damage?
Note: Sediments and debris in inlets and catch basins shall be removed by hand
or with a vacuum truck. Sediments and waste shall be disposed of in accordance
with the City of Carmel and any applicable state, and/or federal requirements.
Additional Comments and Actions to be Taken: Timeframe:
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Conveyances Maintenance (pipes, end sections, culverts, swales, ditches);
Site Name:
Owner Changed Since Last Inspection? Y or N
Owner Name, Address, and Phone Number:
Location on Site:
Date:
Time:
Inspector Name:
Maintenance Item Satisfactory/
Unsatisfactory
Comments
Swales/Ditches (Mow as needed during growing season. Inspect annually)
1. Clear of plants 5” or
more in height?
2. Free from sediment/litter
accumulation?
3. Free from signs of
erosion?
Culverts and End Sections(Inspect and clean at least one per year before rainy season)
1. Sediment/Litter
accumulation? Sediment
should be less than ¼ of
culvert opening
2. Culvert free from
damage?
3. End Section free from
damage?
Pipes – 12” Diameter or more (Inspect and clean at least once per year before rainy season)
1. Sediment/Litter
accumulation? Sediment
should be less than ¼ of
culvert opening
2. Pipe free from damage?
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3. Root obstructions
present?
Pipes – Less than 12” Diameter (Inspect and clean at least twice per year; once occuring before
rainy season)
1. Sediment/Litter
accumulation? Sediment
should be less than ¼ of
culvert opening
2. Pipe free from damage?
3. Root obstructions
present?
Note: Sediments and debris in conveyance systems shall be removed by hand or
with a vacuum truck. When cleaning a pipe, minimize sediment and debris
discharges from pipes to the storm sewer. Install downstream debris traps (where
applicable) before cleaning and then remove material. Sediments and waste
shall be disposed of in accordance with the City of Carmel and any applicable
state, and/or federal requirements.
Additional Comments and Actions to be Taken: Timeframe:
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