HomeMy WebLinkAboutCorrespondenceCarmel High School Parking Lot Addition
Erosion Control Estimate
Stormwater Permit: SW-2021-00005
TRANSMITTAL
SKIL1.1UIq�
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RIP-
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PROJECT: Carmel High School Parking Lot Addition
TO: Hamilton County Recorder's Office
ATTN.
DATE:
PROJECT NUMBER: N/A
•
WE ARE SENDING.
SUBMITTED :FOR:
ACTION TAKEN:
Shop Drawings
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Approval
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Letter
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Your Use
Approved as Noted
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Prints
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As Requested
Returned After Loan
Change Order
FXReview
and Comment
Resubmit
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Plans
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ITEM NO COPIES DATE
DESCRIPTION
1 1 Cannel High School Parking Lot Addition — Stormwater O&M Manual
Received By (Print): ''y t,
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Received By (Signature):
Signed: Brad Pawloski, Assistant Project Manager
The Skillman Corporation
Date: 9,1�
STATUS
1
7
G 114� arF Cap me l S+or mwa&e-r Perrn,'+ s W - a0a I - ocUp 5
Storm water Infrastructure
Operations and Maintenance Manual
2021010432 MISC $25.00
02/09/2021 03:42:14P 20 PGS
Jennifer Hayden
Carmel high School HAMILTON County Recorder IN
Recorded as Presented
Parking Lot Addition IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIUIIIIIIIIIIIIIIIIIIIIII______
520 E. Main Street
Carmel., Indiana
Owner,:
Carmel Clay Schools
5201 E. Main Street
Carmel, Indiana 46033
TLF Project 2020-266
November 25, 2020
b
CONSULTING ENGINEERS
TLF, Inc.
3901 West 86th Street
Indianapolis, IN 46268
Phone (317) 334-1500
Fax (317) 334-1552
TABLE OF CONTENTS
I. Owner Information
II. Site Information
III. BMP Owner Acknowledgement Agreement
IV. Storm Sewer Structure Maintenance
V. Storm Sewer Pipe Maintenance
VI. Aqua -Swirl (Hydrodynamic Separator) Maintenance
VII. Underground Detention Basin Maintenance
VIII. Site Diagrams and Stormwater Details
IX. Inspection and Maintenance Schedule
X. Sample Inspection Checklists
a. Storm Sewer Structure Inspection Checklist
b. Storm Sewer Pipe Inspection Checklist
c. Aqua -Swirl (Hydrodynamic Separator) Inspection Checklist
d. Underground Detention Basin Inspection Checklist
TLF#2020-266 10-October-20
I - OWNER INFORMATION
BMP Owner Name: Carmel Clay Schools
5201 E. Main Street
Carmel, Indiana 46033
Contact: TBD
General Information
The purpose of water quality Best Management Practices (BMPs) is to filter the first flush of
rainwater before it enters the downstream lakes and streams. Through the use of these BMPs,
the sediment and pollutant load in stormwater runoff is reduced, and in many cases the
quantity of stormwater runoff generated is also reduced. The use of BMPs also helps to reduce
hydrocarbons, trash, and debris from entering waterways.
Owner Responsibility
The BMP Owner shall be responsible for all maintenance and costs associated with the
proposed BMPs. In addition, it is the owner's responsibility to perform and/or pay for
inspections and maintenance as recommended below.
Right of Entry
City of Carmel representatives have the right to enter the property to inspect and, if required,
maintain the BMPs at any time.
Annual Inspection Reports
Annual inspection reports shall be submitted to the City of Carmel for each BMP. 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 discrepancies 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 of Carmel.
TLF#2020-266 10-October-20
I
11— SITE INFORMATION
The site contains a Best Management Practices (BMP) for the purpose of sediment removal.
The Mechanical BMP and Underground Detention System are located at the northern portion
of the project site.
City of Carmel will require annual inspection reports of the water quality BMPs.
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TLF#2020-266
LOCATION MAP
10-October-20
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III - BMP OWNER ACKNOWLEDGEMENT AGREEMENT
TLF#2020-266 10-October-20
Owner Acknowledgeinent 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 ("BMP8") listed below, and to follow and
abide by the inspection schedule andmaintenance activities listed in this .Manual. The
Owner also hereby agrees to provide, at Owner's. cost, all additional maintenance, re
pair,
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: Aquaswirl AS-?'
Isolator Row - Underground Storm Water Detention Chambers
Owner Signature Bate
R V- y- C(A 0
Printed Name
STATE OF INDIANA
NOTARY
SS: :,nO PUBLIC
COUNTY OF HAMILTON) �i 1
11� � SEAL L
It
'.d% T vron codpp.
BEFORE ME, Pte unde • igned, a Notai `said County and Mate,
personally appeared on a,,r r4 tid r11111111t06wner subscribed and
sworn before this �-'day of —4:±iA
County of Residence Signature
b4h h0f 1 5.16a7
Commission Expiration Date
�a
Printed Nam
P—j` q1
%0
Pankov"
R;,k E Ri Ca D n C G
"affirm, under the penalties for perjury, that I have
taken reasonable. care to redact each. Social Security
number in this document, unless required by law.'
(name). In IT:grl.
I
IV — STORM SEWER STRUCTURE MAINTENANCE
Storm structures are set at storm sewer pipe connections. Unless you have OSHA approved
training and equipment, never enter a manhole.
Inspection
All inlet castings should be inspected monthly and after each rainfall event. More frequent
inspections should be performed in areas where there is higher potential for trash or litter and
during the fall when leaves are present on the ground. Check the frame and lid for cracks and
wear, such as rocking lids or lids moved by traffic.
Storm structures and the surrounding areas should be inspected annually for pollutants such as
leaks from dumpsters, minor spills, and oil dumping. Take action to have the pollutant source
removed.
Cleaning
Clean structures when there is a blockage of a water flow path or when sediment depth
reaches 6 Cleaning should be performed in a way that ensures removed sediment and water
is not discharged back into the storm sewer.
Safety
Work inside underground structures requires special OSHA -required confined space equipment
and procedures. The most practical option may be to contract with a sewer cleaning
contractor.
Materials Handling
Disposal of waste from .maintenance of drainage facilities shall be conducted in accordance
with federal, state, and local regulations. Removed sediment must be disposed in the garbage
as a solid waste. Water should be disposed of in a sanitary sewer after oils are removed using
oil absorbent materials or other mechanical means. Used oil absorbents should be recycled or
disposed according to the manufacturer's instructions.
Repairs
Repair all security and access features so they are fully functional. This includes locking lids,
covers, and ladder rungs. Replace broken parts or lids that rock or are moved by traffic.
TLF#2020-266 10-October-20
V — STORM SEWER PIPE MAINTENANCE
Storm sewer pipes convey stormwater. Pipes are built from many materials and are sometimes
perforated to allow stormwater to infiltrate into the ground. Storm pipes are cleaned to
remove sediment or blockages when problems are identified. Storm pipes must be clear of
obstructions and breaks to prevent localized flooding.
Inspection
Pipes are difficult to inspect requiring special equipment and training. Usually, if a problem
occurs, the owner needs to call a sewer or plumbing contractor to inspect, repair, or clean
pipes.
Cleaning
Clean pipes when sediment depth is greater than % of the pipe diameter, with a maximum
sediment depth of 6". 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. Generally, use mechanical methods to remove root obstructions
from inside storm sewer pipes. Do not put root -dissolving chemicals in storm sewer pipes. If
there is a problem, remove the vegetation over the line.
Safety
Work inside underground structures requires special OSHA -required confined space equipment
and procedures. The most practical option may be to contract with a sewer cleaning
contractor.
Materials Handling
Disposal of waste from maintenance of drainage facilities shall be conducted in accordance
with federal, state, and local regulations. Removed sediment must be disposed in the garbage
as a solid waste. Water should be disposed of in a sanitary sewer after oils are removed using
oil absorbent materials or other mechanical means. Used oil absorbents should be recycled or
disposed according to the manufacturer's instructions.
Repairs
Repair or replace pipes when a dent or break closes more than 20 percent of the pipe diameter.
Repair or replace pipes damaged by deterioration.
TLF#2020-266 10-October-20
VI — HYDRODYNAMIC SEPARATOR MAINTENANCE
This site contains three AquaSwirl BMP structures. AquaSwirls are designed to remove
sediment, debris, and free oil from entering the sewer system. After construction, the
AquaSwirl structures should be inspected every six months and cleaned as needed or once a
year regardless of whether it has reached full pollutant storage capacity. Disposal of all
sediment, in addition to local requirements, must be in accordance with all federal and state
requirements. See the attached manufacture O&M Manual for complete details of inspection
and cleaning.
Inspection
Inspect the unit every six months. The inspection should determine sediment depth,
accumulation of trash and litter, and the specific maintenance and repairs needed. Annually
check for cracks large enough to let soil enter the vault, broken or defective plates and baffles,
and crushed or damaged pipes.
Cleaning
Remove trash and litter from the vault, inlet, and piping when present. Remove sediment
when it accumulates to 7" or per the manufacturer's maximum recommended depth. Cleaning
should be performed in a way that ensures removed sediment and water is not discharged back
into the storm sewer.
Safety
Work inside underground structures requires special OSHA -required confined space equipment
and procedures. The most practical option may be to contract with a sewer cleaning
contractor.
Materials Handling
Disposal of waste from maintenance of drainage facilities shall be conducted in accordance
with federal, state, and local regulations. Removed sediment must be disposed in the garbage
as a solid waste. Water should be disposed of in a sanitary sewer after oils are removed using
oil absorbent materials or other mechanical means. Used oil absorbents should be recycled or
disposed according to the manufacturer's instructions.
Repairs
Repair any cracked or defective plates or baffles. Repair all security and access features so they
are fully functional. This includes locking lids, covers, and ladder rungs. Replace broken parts
or lids that rock or are moved by traffic.
TLF#2020-266 10-October-20
VII — UNDERGROUND DETENTION BASIN MAINTENANCE
This site contains one underground detention basin as shown on the site exhibit. The basin
discharges into a 12" storm sewer and then to the existing 24" RCP located on the north side of
the project site.
Detention facilities are designed to hold and slowly release stormwater by use of underground
chambers and a specially designed control structure.
Inspection
Inspection is the key to effective maintenance and is easily performed. StormTech recommends
ongoing quarterly inspections of the accumulated sediment. Sediment deposition and transport
may vary from year to year and quarterly inspections will help insure that the systems are
cleaned out at the appropriate time. Inspections should be performed more often in the winter
months in climates where sanding operations may lead to rapid accumulations, or in equipment
washdown areas. It is very useful to keep a record of each inspection.
Systems should be cleaned when inspection reveals that accumulated sediment or trash is
clogging the discharge orifice. StormTech suggests that all systems be designed with an
access/inspection manhole situated at or near the inlet and the outlet orifice.
Should it be necessary to get inside the system to perform maintenance activities, all
appropriate precautions regarding confined space entry and OSHA regulations should be
followed.
Cleaning
Maintaining an underground detention system is the easiest when there is no flow entering the
system, for this reason it is a good idea to schedule the cleanout during dry weather.
Accumulated sediment and trash can typically be evacuated through the manhole over the
outlet orifice. Manhole covers should be securely seated following cleaning activities.
Materials Handling
Disposal of waste from maintenance of drainage facilities shall be conducted in accordance
with federal, state, and local regulations. Removed sediment must be disposed in the garbage
as a solid waste. Water should be disposed of in a sanitary sewer after oils are removed using
oil absorbent materials or other mechanical means. Used oil absorbents should be recycled or
disposed according to the manufacturer's instructions.
TLF#2020-266 10-October-20
I
VIII — SITE DIAGRAMS AND STORMWATER DETAILS
TLF#2020-266
10-October-20
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IX— INSPECTION AND MAINTENANCE SCHEDULE
Structure/BMP
Inspection
Maintenance
Storm Structure Casting
Monthly & after rain events
6" of sediment accumulation
Storm Structure Sump
Annually & after heavy rain
events
6" of sediment accumulation
Storm Sewer Pipe
When problems occur
6" of sediment accumulation
Hydrodynamic Separator
Every 6 months
7" of sediment accumulation
Underground Detention Basin
Every 6 months
As necessary (at a minimum,
annually)
TLF#2020-266 10-October-20
r
X —SAMPLE INSPECTION CHECKLISTS
TLF#2020-266
10-October-20
Storm Sewer Structure Operation, Maintenance, and Management Inspection Checklist for BMP Owners
Project: Owner Change since last inspection? Y N
Owner Name, Address, Phone:
Number:
Location:
Site Status
Date:
Time:
Inspector:
Maintenance Item
Satisfactory/
Unsatisfactory
Comments
Storm Casting and Grate (Inspect monthly and after major storms.)
1. Trash/Debris obstructing inflow
Affected Structures:
2. Silt/Sediment accumulation
Affected Pipes:
3. Other (describe)
Structure Sump (Inspect annually and after major storms)
1. Sediment/Debris in sump
Affected Structures:
2. Other (describe)
Headwall Structures (Inspect annually and after major storms)
1. Vegetation around headwall
2. Erosion around headwall
3. Animal burrows
4. Headwall clear of obstructions
5. Sediment Accumulation
Affected Structures:
6. Other (describe)
Additional Comments:
Actions to be taken: Timeframe:
Storm Sewer Pipes Operation, Maintenance, and Management Inspection Checklist for BMP owners
Project: Owner Change since last inspection? Y N
Owner Name, Address, Phone:
Number:
Location:
Site Status
Date:
Time:
Inspector:
Maintenance Item
Satisfactory/
Unsatisfactory
Comments
Storm sewer pipes (Inspect annually and after major storms)
1. Trash/Debris obstructing inflow
Affected Pipes:
2. Silt/Sediment accumulation
Affected Pipes:
3. Other (describe)
Additional Comments:
Actions to be taken: Timeframe:
Aqua -Swirl Water Quality Structure Operation, Maintenance, and Management Inspection Checklist for
BMP Owners
Project: Owner Change since last inspection? Y N
Owner Name, Address, Phone:
Number:
Location:
Site Status:
Date:
Time:
Inspector:
Maintenance Item
Satisfactory/
Unsatisfactory
Comments
Aqua -Swirl Concentrator (Inspect quarterly and after major storms)
1. Condition of Structure
2. Trash/Debris obstructing inflow
Affected Structures:
3. Silt/Sediment accumulation
Affected Pipes:
4. Other (describe)
Filtration Chamber (Cleaned annually at a minimum)
1. Condition of Chamber and Filter Trays
2. Color of Filter Media
3. Sediment/Debris in sediment chamber
pumped and unit is pressure washed
4. Other (describe)
Additional Comments:
Actions to be taken Timeframe:
y
Underground Detention Operation, Maintenance, and Management Inspection Checklist for BMP Owners
Project: Owner Change since last inspection? Y N
Owner Name, Address, Phone:
Number:
Location:
Site Status
Date:
Time:
Inspector:
Maintenance Item
Satisfactory/
Unsatisfactory
Comments
Inflow Points (Inspect every 6 months)
1. Trash/Debris/Sediment obstructing inflow
Affected Pipes:
2. Structure Condition
3. Pipe Condition
4. Other (describe)
Underground Chambers
1. Debris/Sediment accumulation
2. Access condition
3. Chambers structural condition
4. Weir condition
5. Leaking chambers
6. Oil accumulation
7. Proper drainage
8. Other (describe)
Outlet Device
1. Debris/Sediment obstructing outflow
2. Structure condition
3. Pipe Condition
4. Orifice Plate/outlet pipe blockage
5.Other (describe)
Additional Comments:
Actions to be taken: Timeframe: