HomeMy WebLinkAboutO&M Manual
Prepared by: HWC Engineering, Chad James
I 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. Chad James
OPERATIONS AND
MAINTENANCE
MANUAL
OLD MERIDIAN & MAIN
CARMEL, INDIANA
BMP OWNER:
Edward Rose & Sons
11611 N Meridian St, Suite 800
Carmel, IN 46032
CIVIL ENGINEER:
HWC ENGINEERING
135 N Pennsylvania Street, Suite 2800
Indianapolis, IN 46204
317-347-3663 office
317-347-3664 fax
PROPERTY:
Parcel Number Cross Reference:
16-09-25-03-01-002.000
JUNE 2022
HWC PROJECT NUMBER: 2021-274-S
OLD MERIDIAN & MAIN
CARMEL, INDIANA
.
OPERATIONS AND MAINTENANCE MANUAL | HWC ENGINEERING
BMP OWNER CONTACT INFORMATION:
Edward Rose & Sons
11611 N Meridian St #800
Carmel, IN 46032
Business: 317-297-3060
Emergency Contact: 317-569-7629
Bradley_schrage@edwardrose.com
EMERGENCY CONTACT INFORMATION:
City of Carmel Fire Department: 317-571-2600
City of Carmel Public Works & Engineering Department: 317-571-2441
Indiana Department of Environmental Management: 317-232-8603
BMP INFORMATION:
This Operation and Maintenance (O&M) Manual has been prepared for the Old Meridian and Main
Development to help the owner operate and maintain the post‐construction Best Management
Practices (BMPs). Old Meridian and Main will utilize a StormTrap Site Saver and one (1) Aqua-Swirl
Stormwater Quality Unit to handle water quality.
REPORTING REQUIREMENTS:
It is the responsibility of the BMP Owner to operate and maintain the installed BMPs, including
routine monthly and annual inspections. The BMP Owner is responsible for all costs associated with
the BMP inspections and repairs. Maintenance responsibilities shall remain in effect for the life of
the BMP. Inspections must be documented on the inspection form included in the Appendices.
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.
Submit Annual Reports to:
Storm Water Program
Engineering Department
One Civic Square
Carmel, IN 46032
The BMP Owner shall be responsible for all fees as outlined by the City of Carmel.
OLD MERIDIAN & MAINBMP LOCATION EXHIBITCARMEL, INSEPTEMBER 20220'SCALE: 1" = GRAPHIC SCALE50'100'150'50'
OLD MERIDIAN & MAIN
CARMEL, INDIANA
OPERATIONS AND MAINTENANCE MANUAL | HWC ENGINEERING
STORMWATER
QUALITY UNIT BMP
OLD MERIDIAN & MAIN
CARMEL, INDIANA
.
OPERATIONS AND MAINTENANCE MANUAL | HWC ENGINEERING
BMP DESCRIPTION
Stormwater quality structures remove sediment, floatables, oils, etc. from the stormwater
prior to it reaching the adjacent wet pond. These units serve as stormwater pretreatment
measures the downstream detention basin.
BMP MAINTENANCE AND INSPECTION ACTIVITIES
The BMP owner should inspect the structure every three months (minimum) during
construction and clean the system. During the first year post-construction, the structure
must be inspected every six months and cleaned as needed, regardless of whether the
structure has reached its sediment of floatable pollutant storage capacity. After the first
year, if the structure did not reach the full sediment or floatable pollutant capacity in the first
year post construction, the system can then be inspected annually and cleaned as needed
or bi-annually at a minimum. If the structure did reach full sediment or floatable pollutant
capacity during the first year post-construction, they system should be inspected bi-annually
and cleaned as needed. The system should be cleaned bi-annually regardless of whether it
reaches its sediment or floatable pollutant capacity.
The following tasks are considered the routine maintenance:
1. Floatable Debris and Oil:
• Remove manhole lid to expose liquid surface of the structure.
• Remove floatable debris with basket or net if any is present.
• If a hydrocarbon spill has occurred, (e.g. more than a sheen of oil or
gas is present) the system should be cleaned immediately (see
"Cleaning" Figure 3).
i. Note: Water in an stormwater quality structure can appear
black due to the dark body of the surrounding structure. Oil
appears darker than water in the system and is usually
accompanied by debris (e.g. Styrofoam, etc.) with obvious signs
of oil stains. The depth of oil can be measured with an oil/water
interface probe, a stadia rod with water phylic paste, a coliwasa,
or by simply collecting a representative sample with a jar
attached to a rod.
• If hydrocarbon absorbent floc or pads are used, these should be
inspected to determine whether they are loaded with hydrocarbons.
This will be indicated by a dark coloration of the pad or floc. Pads
and/or floc should be removed and disposed of in accordance with
city, state, federal laws if they contain hydrocarbons.
• Remove sediment, oil and other floatable pollutants with a vactor
truck. Dispose of all waste in accordance with city, state, and federal
requirements. Liquids should be taken to an industrial waste water
OLD MERIDIAN & MAIN
CARMEL, INDIANA
.
OPERATIONS AND MAINTENANCE MANUAL | HWC ENGINEERING
treatment facility for treatments. Liquids and solids removed from the
structure should not be dumped back into the stormwater system or
into a sanitary sewer.
2. Sediment Accumulator
• Lower a dipstick tube equipped with a ball valve (e.g. Sludge Judge or
similar device) into structure through the service access provided.
• Measure the depth of the sludge. At a maximum, the sludge should not
exceed 36" depth before maintenance.
3. Diversion Structures
• Inspect weir or other structure for structural decay or damage. Weirs
are more susceptible to damage than offset piping and should be
checked to confirm that they are not crumbling or decaying.
• Inspect diversion structure and by-pass piping for signs of structural
damage or blockage from debris or sediment accumulation.
• Measure elevations on diversion weir or piping to ensure it is
consistent with site plan design.
• Inspect downstream structure in diversion system for signs of blockage
or structural failure.
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 AquaSwirlTM should be cleaned once a year regardless of whether it has reached full pollutant storage capacity during the construction
phase of the project.
Activity 123456789101112
Inspect and Clean as Needed XX
Inspect Bypass Structures XX
(if applicable) and Maintain
As Needed
Clean System*X*
* The AquaSwirlTM should be cleaned at the end of the first year post construction if it is at or near its pollutant storage capcacity.
Otherwise, the system can be cleaned at a later date depending on how quickly the sediment starts to harden.
Activity 123456789101112
Inspect and Clean as Needed*XX
Inspect Bypass Structures*XX
(if applicable) and Maintain
As Needed
Clean System*
*If the AquaSwirlTM did not reach full sediment or floatable pollutant capacity in the First Year Post-Construction, the system can be inspected
once annually. If the AquaSwirlTM 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 and cleaned as needed.
Regardless of whether the AquaSwirlTM reaches full sediment or floatable storage capacity, it should be cleaned
frequently enough to prevent captured sediments from hardening. Normally, cleaning once every two to three years should be sufficient to
prevent sediments from hardening.
*The bypass system should be inspected with each AquaSwirlTM inspection and maintained as needed.
Aqua-Swirl TM
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 5
City of Indianapolis Stormwater Quality Unit (SQU)
Selection Guide
Pg. 1 01/02/19
Version 13.0
(Check
http://www.indy.gov/eGov/City/DPW/Business/Specs/Pages/UpdatedStormWaterManual.aspx
for current Selection Guide)
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.
Rate Based SQUs - Table 1
Manufactured
SQU SQU System Model
Max
Treatment
Flow
(cfs)
Max 10-yr
On-Line
Flow Rate
(cfs)
Cleanout
Depth
(Inches)
Stormceptor®
2,3
STC 450 0.37 N/A 8
STC 900 0.83 N/A 8
STC1200 0.83 N/A 10
STC 1800 0.83 N/A 15
STC 2400 1.38 N/A 12
STC 3600 1.38 N/A 17
STC 4800 2.30 N/A 15
STC 6000 2.30 N/A 18
STC 7200 3.22 N/A 15
STC 11000 4.59 N/A 15
STC 13000 4.59 N/A 18
STC 16000 6.43 N/A 15
Downstream
Defender® 2
4 Foot Diameter 1.3 N/A 18
6 Foot Diameter 3.58 N/A 24
8 Foot Diameter 7.35 N/A 30
10 Foot Diameter 12.85 N/A 36
VortSentry®2,3
VS30 0.28 N/A 36
VS40 0.58 N/A 36
VS50 1.01 N/A 36
VS60 1.60 N/A 36
VS70 2.35 N/A 36
VS80 3.28 N/A 36
Vortechs®2,3
1000 0.49 N/A 30
2000 1.00 N/A 30
3000 1.75 N/A 30
4000 2.76 N/A 30
5000 4.05 N/A 30
7000 5.66 N/A 30
City of Indianapolis Stormwater Quality Unit (SQU)
Selection Guide
Pg. 2 01/02/19
Version 13.0
Manufactured
SQU SQU System Model
Max
Treatment
Flow
(cfs)
Max 10-yr
On-Line
Flow Rate
(cfs)
Cleanout
Depth
(Inches)
9000 7.59 N/A 30
11000 9.88 N/A 30
16000 15.59 N/A 30
PC1319 or 1319 CIP 19.04 N/A 30
PC1421 or 1421 CIP 22.92 N/A 30
1522 CIP 27.23 N/A 30
1624 CIP 32.00 N/A 30
1726 CIP 37.24 N/A 30
1827 CIP 42.96 N/A 30
1929 CIP 49.17 N/A 30
2030 CIP 55.90 N/A 30
2131 CIP 63.15 N/A 30
2233 CIP 70.94 N/A 30
2334 CIP 79.28 N/A 30
2436 CIP 88.18 N/A 30
2538 CIP 97.66 N/A 30
2639 CIP 107.72 N/A 30
2740 CIP 118.37 N/A 30
2842 CIP 129.64 N/A 30
2943 CIP 141.53 N/A 30
3045 CIP 154.05 N/A 30
3146 CIP 167.21 N/A 30
3349 CIP 195.49 N/A 30
3958 CIP 296.83 N/A 30
4060 CIP 316.23 N/A 30
Aqua-Swirl™
2,3
AS-2 0.26 N/A 24
AS-3 0.50 N/A 32
AS-4 0.98 N/A 32
AS-5 1.47 N/A 32
AS-6 2.32 N/A 32
AS-7 3.40 N/A 32
AS-8 4.75 N/A 32
AS-9 6.38 N/A 32
AS-10 8.30 N/A 32
AS-11 10.54 N/A 32
AS-12 13.10 N/A 32
AS-13 16.00 N/A 32
AQUA-SWIRL AS-9 BMP UNITNOT TO SCALE
SiteSaver® Manufacturer’s I nstruction Manual
Regular inspections are recommended to ensure that the system is functioning as designed.
Please contact your Authorized SiteSaver Representa tive if you have questions regarding the
inspection and maintenance of the SiteSaver system. SiteSaver does not require entry into
the system for maintenance; however , it is prudent to note that prior to entry into any
underground storm sewer or underground structure, appropriate OSHA and loca l safety
regulations and guidelines should be followed.
I nspection Scheduling
The frequency of inspections and maintenance is sit e specific. Within the first year of
operation , it is recommended that the unit be inspected every six months to determine the
rate of pollutant accumulation. SiteSaver systems are recommended for inspection whenever
the upstream and downstream catch basins and stormw ater pipes of the stormwater collection
system are inspected or maintained. This will minimize the cost of the inspection if it is done
at the same time. If checked on an annual basis, the inspection should be conducted before
the stormwater season begins to ensure that the system is functioning properly for the
upcoming storm season.
I nspection Process
Inspections should be done such that a sufficient t ime has lapsed since the most recent rain
event to allow for a static water condition. Visually inspect the system at all manhole
locations. For debris accumulation, visually inspect the netting component (if utilized) to
determine bag capacity. Nets containing only minor quantities of debris may be retained in
place. It is recommended to replace the nets when the y appear 1/2 - 2/3 full. Failure to
replace nets and/or remove floatables from bypass screening (if applicable) will lead to
hydraulic relief, drain down deficiencies, and decr ease the long -term functionality of the
system.
For sediment accumulation, u tilize either a sludge sampler or a sediment pole t o measure and
document the amount of sediment accumulation. To d etermine the amount of sediment in
the system with a sludge sampler follow the manufacturer’s instructions. If utilizing a
sediment pole, first insert the pole to the top of the sediment la yer and record the depth.
Then, insert the pole to the bottom of the system and record the depth. The difference in the
two measurements corresponds to the amount of sedim ent in the system. Eight -inches of
sediment accumulation corresponds to the designed s ediment storage capacity, four -inches
equates to 50% capacity, etc. Finally, inspect the inlet pipe opening to ensure that the silt
level or any foreign objects are not blocking the p ipe.
Mainten ance Process – Debris Removal
Maintenance should be done utilizing proper persona l protective equipment such as: safety
glasses, hard -hat, gloves, first aid kit, etc. Maintenance shoul d occur only when a sufficient
time has lapsed since the most recent r ain event to allow for a static water condition for the
duration of the maintenance process.
For floatable debris removal, lift the netting bag by the frame , moving it upwards along the
netting support frame. To ease lifting the nets to the surface, gaff hooks or a service vehicle
(crane/hoist/boom truck) may be used. Slowly raise the netting frame allowing water in the
net to drain as it is raised to allow it to drip dry. Once the netting component is full y removed
from the system, it should be properly disposed of per local, state, and federal guidelines and
regulations. Typically, the netting component can be disposed of in a common dumpster
receptacle.
For sediment removal, the SiteSaver is designed wit h clear access at both the inlet and outlet.
A vacuum truck, or similar trailer mounted equipmen t, can be used to remove the sediment,
hydrocarbons, and water within the unit. For more effective rem oval , it is recommended to
use sewer jetting equipment or a spray lance to for ce the sediment to the vacuum hose.
When the floor is sufficiently cleaned, fill the sy stem back to its normal water elevation (to
the pipe inverts).
Maintenance Process – Net Replacement
Install a new net assembly by sliding the netting f rame down the support frame and ensure
the netting lays over the plate assembly. To order additional disposable nets, contact your
local SiteSaver representative. New nets come with tie wraps temporarily holding the net
material to the frame component for easy handling a nd storage. It is not recommended to
remove the tie wraps until the net is ready to be i nstalled. The frame is tapered from top
(widest part) to bottom, and is also tapered from f ront (towards the sewer) to back. Cut the
tie wraps that secures the netting material to the frame for shipment and lower the net down
the guide rails. If debris has accumulated in the net support frame, remove the objects so
the new net seats fully in the channel when install ed. If utilizing oil sorption socks, insert
them into the net cavity prior to lowering th e net down the guide rails. The oil sorption socks
are designed to absorb approx. ¼ gallon of hydrocar bons; it is typically recommended to use
enough socks to absorb a gallon of hydrocarbons per treated cfs.
When lowering the net the following details should be exercised when placing the net:
• Watch the lowering to make sure that there are no u nexpected entanglements.
• Be careful not to let the toe of the net get caught under the frame when it reaches the
bottom of the support frame. This is typicall y accomplished by holding the toe of the
net until after the net has started to prop into pl ace.
• Finally, secure the access openings and properly di spose of the sediment per local,
state, and federal guidelines and regulations.
In the case of only floatables removal, a vacuum tr uck is not required. However, a vacuum
truck is required i f the mainte nance event is to include oil removal and/or sedime nt removal.
Proof of inspections and maintenance is the responsibility of the owner. All inspection reports
and data should be kept on site or at a location wh ere they will be accessible for years in th e
future. Some municipalities require these inspecti on and cleaning reports to be forwarded to
the proper governmental permitting agency on an ann ual basis. Refer to your local and
national regulations for any additional maintenance requirements and schedules not contained
herein. Inspections should be a part of the standa rd operating procedure. It is good practice
to keep records of rainfall events between maintena nce events and the weight of material
removed , even if no report is required.
STORMTRAP MAINTENANCE MANUAL
1. Introduction
Regular inspections are recommended to ensure that the sys tem is functioning as designed.
Please call your Authorized StormTrap Representative if you have questions in regards to the
inspection and maintenance of the StormTrap system. Prior to entry into any underground
storm sewer or underground detention systems, appropriate OSHA a nd local safety
regulations and guidelines should be followed.
2. Inspection Schedules for Municipalities
StormTrap Stormwater Management Systems are recommen ded for inspection whenever the
upstream and downstream catch basins and stormwater pipes of the stormwater collection
system are inspected or maintained. This will economize the cost of the inspection if it is done
at the same time the Municipal crews are visiting the area.
3. Inspection Schedules for Private Development
StormTrap Stormwater Mangement Systems, for a private d evelopment, are recommended
for inspection after each major storm water event. At a minimum, until a cleaning schedule
can be established, an annual inspection is recommended. If in spected on an annual basis,
the inspection should be conducted before the stormwater season begins to be sure that
everything is functioning properly for the upcoming storm season.
4. Inspection Process
Inspections should be done such that at least 2-3 days has lapsed since the most recent rain
event to allow for draining. Visually inspect the system at all manhole locations. Utilizing a
sediment pole, measure and document the amount of silt at each manhole location (Figure
1). Inspect each pipe opening to ensure that the silt level or any forei gn objects are not
blocking the pipes. Be sure to inspect the outlet pipe(s) because this is typically the smallest
pipe in the system. It is common that most of the larger materials will be coll ected upstream
of the system in catch basins, and it is therefore important at time of inspections to check
these structures for large trash or blockages.
Remove any blockages if you can during the inspection process only if you can do so safely
from the top of the system without entering into the system. Do not go into the system
under any circumstances without proper ventilation equipment and training. Pass any
information requiring action onto the appropriate maintenance personnel if you c annot
remove the blockages from above during the inspection process. Be sure to describe the
location of each manhole and the type of material that needs to be removed.
The sediment level of the system should also be measured and recorded during the inspection
process. Recording the sediment level at each manhole is very i mportant in order get a history
of sediment that can be graphed over time (i.e. years) in order to estimate when the system
will need to be maintained next. It is also important to keep these record s to verify that the
inspection process was actually performed if anyone asks for your records in the future.
The sediment level in the underground detention system can be determined from the outside
of the system by opening up all the manholes and using a sediment pole to measure the
amount of sediment at each location. Force the stick to the bottom of the system an d then
remove it and measure the amount of sediment at that location. Again, do n ot go into the
system under any circumstances without proper ventilation equipment and training.
5. When to Clean the System
Any blockages should be safely removed as soon as practical so that the Stormwater detention
system will fill and drain properly before the next stormwater event.
The Dry Detention System should be completely cleaned whenever the sediment occupies
more than 10% to 15% of the originally designed system’s volume. The Wet Detention
System should be cleaned when the sediment occupies more than 30% or 1/3rd of the
originally designed system’s volume. NOTE: Check with your municipality in regards to
cleaning criteria, as the allowable sediment before cleaning may be more or less then
described above.
6. How to Clean the StormTrap
The system should be completely cleaned back to 100% of the originally designed storage
volume whenever the above sediment levels have been reached. Be sure to wait at least 3
days after a stormwater event to be sure that the system is completely drained (if it is a Dry
Detention System), and all of the sediments have settled to the bottom of the s ystem (if it is
a Wet Detention System).
Do not enter the System unless you are properly trained, equipped, and qualified to enter a
confined space as identified by local occupational safety and health regulations.
There are many maintenance companies that are in business to help you clean your
underground stormwater detention systems and water quality units. Please call your
StormTrap representative for referrals in your area.
A. Dry Detention System Cleaning
Maintenance is typically performed using a vacuum truck. Sediment should be flushed towards
a vacuum hose for thorough removal. For a Dry Detention System, remove the manhole cover
at the top of the system and lower a vacuum hose into one of the rows of the StormTrap
system. Open up the manhole at the opposite end of the StormTrap and use sewer jetting
equipment to force water in the same row from one end of the StormTrap row to the opposite
side. The rows of the StormTrap are completely open in one contiguous channel from one end
to the other for easy cleaning.
Place the vacuum hose and the sewer jetting equipment in the next row and repeat the
process until all of the rows have been cleaned.
When finished, replace all covers that were removed and dispose of the collected
material properly.
B. Wet Detention System Cleaning
If the system was designed to maintain a permanent pool of water, floatables and any oil
should be removed in a separate procedure prior to the removal of all sediment.
The floatable trash is removed first by using a bucket strainer to capture and remove any
floating debris.
The floatable oils are then removed off the top of the water by using the vacuum truck to
suck off any floatable fluids and liquids.
The next step is to use the vacuum truck to gently remove the clarified water above the
sediment layer.
The final step is to clean the sediment for each row as described above in the paragraph “A.
Dry Detention System Cleaning”. For smaller systems, the vacuum truck can remove all of
the sediment in the basin without using the sewer jetting equipment because of the smaller
space.
7. Inspection Reports
Proof of these inspections is the responsibility of the property owner. All inspection reports
and data should be kept on site or at a location where they will be accessible for years in the
future. Some municipalities require these inspection and cleaning reports to be forwarded to
the proper governmental permitting agency on an annual basis.
Refer to your local and national regulations for any addition al maintenance requirements and
schedules not contained herein. Inspections should be a part of your standard operati ng
procedure.
Figure 1. During inspection, measure the distance from finished grade to the top of the
sediment inside the system.
Sample inspection and maintenance log