DOCS-#219820-v1-STORMWATER_MAINTENANCE_AG___RECORDED_A739696Document Number: A739696
Filed and/or Recorded on
Dec 28, 2021 1:54 PM
Office of the County Recorder/Registrar of Titles
Carver County, Minnesota
Kaaren Lewis, County Recorder
Deputy DL
Document Recording Fees $ 46.00
Document Total $ 46.00
Requesting Party: City of Chanhassen
Pages: 36
This cover page has been added to this document by Carver County Land Records
and is now an official part of this recorded document
STORMWATER MAINTENANCE AGREEMENT/
BEST MANAGEMENT PRACTICE FACILITIES
THIS AGREEMENT is made and entered into as of the & day of , 2021, by and
between CBH PROPERTIES CHANHASSEN, LLC, a Minnesota limited liability company, hereinafter
refereed to as the "Owner" and the CITY OF CHANHASSEN, a Minnesota municipal corporation,
hereinafter referred to as the "City".
RECITALS
A. The Owner is the owner of certain real property located in Carver County, Minnesota,
legally described as follows:
Lot 3, Block 1, Crossroads of Chanhassen
("Property"); and
B. The Owner is proposing construction and implementation of an underground and surface
level stormwater (Best Management Practice) BMP system within the Property; and
C. The submitted permit application, hereinafter called the "Plans", which are expressly made
a part hereof, as approved by the City, provides for filtration/infiltration of stormwater within the confines
of the Property via an underground and surface level stormwater BMP system; and
D. The City and the Owner agree that the health, safety, and welfare of the residents of the
City of Chanhassen, Minnesota, require that on -site stormwater management/BMP facilities be
constructed and maintained on the Property; and
E. The City requires that the on -site underground and surface Stormwater BMP facilities
("Stormwater Facilities") as shown on the Plans be constructed and adequately maintained by the Owner
as a condition of final permit approval; and
F. The Owner is required to enter into this Agreement and grant to the City a license to enter
the Property to inspect and, if necessary, complete work required under the terms of this Agreement.
NOW, THEREFORE, in consideration of mutual covenants of the parties set forth herein and other
valuable consideration, the receipt and sufficiency of which are hereby aclmowledged, the parties agree as
follows
1. Construction of Stormwater Improvements. Owner shall construct the Stormwater
Facilities in accordance with the plans and specifications identified in the Plan.
2. Maintenance of Stormwater Irn rovements.
A. The Owner shall adequately maintain the Stormwater Facilities in accordance with the City
engineering standards for stoimwater treatment facilities attached hereto as Exhibit A. This includes all
216829v1
pavement, pipes, channels, and other conveyances built to convey stormwater to the facility, as well as all
structures, improvements, and vegetation provided to control the quantity and quality of the stormwater.
Adequate maintenance is herein defined as good working condition so that these Stormwater Facilities are
performing their design functions.
B. The Owner will perform the work necessary to keep these Stormwater Facilities in good
working order as appropriate. In the event a maintenance schedule for the Stormwater Facilities (including
sediment removal) is outlined on the approved Plans, the schedule will be followed and comply with all
applicable federal, state, and local regulations relating to the disposal of material, such as sediment.
3. Inspection and Reporting. The Owner shall inspect the Stormwater Facilities and submit
an inspection report annually and shall be responsible for the payment of any associated costs. The purpose
of the inspection is to assure safe and proper functioning of the facilities. The inspection shall cover the
entire facilities. Deficiencies shall be noted in the inspection report set forth in Exhibit A.
4. City Access and Maintenance Rights.
A. The Owner hereby grants a license to the City, its authorized agents and employees, to
enter upon the Property to inspect the Stornwater Facilities whenever the City deems necessary as shown
on Exhibit B, and to complete any maintenance, if necessary subject and pursuant to the terms of
subparagraph B, below. The City shall provide written notice to the Owner fourteen (14) days prior to
entry. The City shall provide the Owner, copies of the inspection findings and a directive to commence
with the repairs if necessary ("Inspection Report").
B. In the event the Owner fails to maintain the Stormwater Facilities in good working
condition acceptable to the City and such failure continues for 60 days after the City gives the Owner
written notice of such failure, the City may enter upon the Property and take whatever steps necessary,
including excavation and the storage of materials and equipment-, to correct deficiencies identified in the
Inspection Report. The City's notice shall specifically state which maintenance tasks are to be performed.
The City may charge the costs, including assessing the City's costs to the Owner's property taxes, to the
Owner. This provision shall not be construed to allow the City to erect any structure of permanent nature
outside of the area of the Stormwater Facilities. It is expressly understood and agreed that the City is under
no obligation to routinely maintain or repair said Stormwater Facilities, and in no event shall this
Agreement be construed to impose any such obligation on the City. In addition, Owner agrees that it is,
and will be, solely responsible to address complaints and legal claims brought by any third party with
regard to the maintenance and operation and the consequences there from the Stormwater Facilities. The
Owner shall defend and hold the City harmless from any such third -party claim, except to the extent of
the City's or its agents', contractors' or employees' negligence or willful misconduct.
5. Reimbursement of Costs. The Owner shall reimburse the City for all costs reasonably
incurred by the City in the enforcement of this Agreement, or any portion thereof, including court costs
and reasonable attorneys' fees.
6. Indemnification. This Agreement imposes no liability of any kind whatsoever on the City.
The Owner shall indemnify and hold harmless the City and its agents and employees against any and all
claims, demands, losses, damages, and expenses (including reasonable attorneys' fees) arising out of or
2
216829v1
resulting from the Owner or the Owner's agents' or employees' negligent or intentional acts, violation of
any safety law, regulation or code, without regard to any inspection or review made or not made by the
City, its agents or employees or failure by the City, its agents or employees to take any other prudent
precautions, except to the extent of the City's or its agents', contractors' or employees' negligence or
willful misconduct. In the event the City, upon the failure of the Owner to comply with any conditions of
this Agreement, performs said conditions pursuant to its authority in this Agreement, the Owner shall
indemnify and hold harmless the City, its employees, agents and representatives from any cost, damage
or harm, except to the extent resulting from the City's or its agents', or employees' negligent acts or willful
misconduct in the perfonnance of the Owner's required work under this Agreement. Failure to perform
any of the Owner's required work shall not be considered negligence by the City, its employees, agents
or representatives.
7. Notice. All notices required under this Agreement shall either be personally delivered or
be sent by certified or registered mail and addressed as follows:
To the Owner: CBIH Properties Chanhassen, LLC
Attention: Legal Department
17725 Katy Freeway, Suite 200
Houston, Texas 77094
To the City: City of Chanhassen
Attention: Water Resources Coordinator
7700 Market Boulevard
P.O. Box 147
Chanhassen, Minnesota 55317
All notices given hereunder shall be deemed given when personally delivered or two business days after
being placed in the mail properly addressed as provided herein.
8. Successors/Covenants Run With the Proper . The terms and conditions of this
Agreement shall run with the Property. All duties and obligations of Owner under this Agreement shall be
duties and obligations of Owner's successors and assigns, jointly and severally. In connection with the
development of the Property, Owner, or its successors or assigns, shall record a declaration against the
Property and establish a homeowner's association to govern certain matters relating to the Property under
the terms of such declaration which shall include the obligation of the homeowner's association to be comply
with the terms of this Agreement. Effective upon the recording of the declaration against the Property and
conveyance of a parcel within the Lot 3, Block 1 Crossroads of Chanhassen plat, such association, as
Owner's assign hereunder, shall thereafter be a party hereto and Owner shall thereafter have no further
rights, duties and/or obligations under or pursuant to this Agreement as to the parcel conveyed.
9. Covenants Run with Property. The terms and conditions of this Agreement shall run with
the Property and shall be binding upon future owners of the Property.
[Remainder of page intentionally left blank.
Signature pages (2) follow.]
216829vl
Owner:
CBH PROPERTIES CHANHASSEN, LLC
a Minnesota limited liability company
Jacqu s Crargf ice President
STATE OF TEXAS
) ss.
COUNTY OF HARRIS )
The foregoing instnunent was acknowledgefore me this day of , 2021,
by Jacques Craig, the Vice President of CBJ4 Properties Chanhassen, LLC, a Minnesota limited
liability company, on behalf of said entity. 14
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tu9y Notary !® # 13028088g
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216829V1
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CITY:
STATE OF MINNESOTA )
)ss.
COUNTY OF CARVER ) y
The foregoing instrument was acknowledged before me this ay o ��,2021,by
Elise Ryan and Laurie Hokkanen, respectively, the Mayor and City Manager, of the City of Chanhassen,
a Minnesota municipal corporation, on behalf of the corporation and pursuant to the authority granted by its
City Council.
n
THIS INSTRUMENT WAS DRAFTED BY:
CAmmr,, LL KNuTSON
Professional Association
Grand Oak Office Center I
860 Blue Gentian Road, Suite 290
Eagan, Minnesota 55121
Telephone: (651) 452-5000
AMP/jmo
T. MEUWISSEN1:*::K'
otary Pubji nnesota
Commission Expires Jan 31, 2025
216829v1
5
EXHIBIT A
TO
STORMWATER MAINTENANCE AGREEMENT
Operations and Maintenance of Stormwater Facility
The Owner, shall be vested with and shall be responsible for conducting an annual inspection of the
stormwater facility as depicted and attached hereto, utilizing the stormwater facility maintenance inspection
checklist, attached hereto, and shall snake any repairs to the stormwater facility necessary for its intended
design and function, as reasonably determined by the City's Water Resources Coordinator for the remaining
life of the Stormwater Facility.
SEE ATTACHED PLANS AND SPECIFICATIONS
6
216929v1
Christian Brothers Automotive
Chanhassen, MN
OPERATIONS AND MAINTENANCE PLAN
8941 Crossroads Blvd.
Chanhassen, MN
Prepared for:
Christian Brothers Automotive
July 22, 2021
Prepared By:
Kimley-Horn and Associates, Inc.
767 Eustis Street, Suite 100
St. Paul, MN 55114
(651)645-4197
I hereby certify that this plan,
specification, or report was prepared by
me or under my direct supervision, and
that I am a duly Registered Professional
Engineer under the laws of the State of
Minnesota.
Brandon R. Elegert, P.E.
Date: 07/22/2021 Registration No. 50387
STORMWATER MANAGEMENT OPERATION & MAINTENANCE PLAN - 1
Christian Brothers Automotive
Chanhassen, MN
CHRISTIAN BROTHERS AUTOMOTIVE CHANHASSEN
STORMWATER MANAGEMENT
OPERATION & MAINTENANCE PLAN
Activity__Frequency..._.__.___
Water plants
As necessary during first growing season
Water plants during dry periods
As needed after first growing season
Re -mulch void areas
As needed
Treat diseased trees and shrubs
As needed
Inspect soil and repair eroded areas
Monthly
Inspect integrity of storm sewer castings
and remove accumulated debris from
rates
As needed
Remove litter and debris
Monthly
Add additional mulch
Once per year
Sum ed Manholes
Once per year and as needed
BMP # 1 — ADS Stormtech
Twice per year and as needed
BMP #IA - ADS Ba Filter
Twice per year and as needed
BMP # 1 B — Hydra International
Downstream Defender
Once per year and as needed
Stormwater Reuse Irrigation Equipment
Oncer per year, as needed and
recommended by Manufacturer
Access
Sufficient access shall be provided to the facility to allow all necessary inspection and
maintenance activities to be completed. Maintenance of access areas shall include removal
of tree seedlings and woody vegetation, repair of eroded areas and removal of litter and
debris.
Erosion
The soil and mulch in the facility and in areas draining to the facility shall be inspected for
eroded areas. Eroded areas shall be filled with soil or mulch and vegetated.
Outlet Structure Maintenance
The Owner will be responsible for outlet structure maintenance. Periodically, the low flow
orifice may clog with debris. Debris should be removed and disposed of outside of the
facility limits.
STORMWATER MANAGEMENT OPERATION & MAINTENANCE PLAN - 2
Christian Brothers Automotive
Chanhassen, MN
Debris & Litter
Debris and litter should be removed on a monthly basis to maintain appearance and
functionality of the facility.
Plant Maintenance
The vegetation type and amount are important to ensure that the facility operates correctly.
Proper vegetation maintenance includes watering plants during dry periods, re -mulching
void areas, treating diseased trees and shrubs and mowing turf areas.
MAINTENANCE OF UNDERGROUND
ADS SC-310 DETENTION SYSTEM
Regular inspection and maintenance are critical to the effective operation of the
underground filtration systems. It is the responsibility of the property owner to maintain
all stormwater BMPs in accordance with the minimum design standards and other
guidance provided in this manual. See Appendix A for ADS Stormtech guidelines for
additional operation and maintenance procedures.
Inspection Schedule
One inspection form shall be completed for the underground detention system on a monthly
or annual basis as specified on the checklist.
Erosion
The soil and mulch on the property shall be inspected for eroded areas. Eroded areas shall
be filled with soil or mulch and vegetated. In the event that erosion persists in a particular
area, compacted aggregate shall be used to further stabilize the slope and to mitigate future
erosion.
Sediment Accumulation & Clogging
Sediment accumulation within the facility may reduce the infiltration capacity and impair
proper performance of the facility. The facility shall be inspected for accumulation of
sediment as part of the inspection. Excessive sediment accumulation shall be removed.
Outlet Structure Maintenance
The Owner will be responsible for outlet structure maintenance. Periodically, the outlet
pipe may clog with debris, Debris should be removed and appropriately disposed of off -
site.
Standing Water/Pipe Inspection
Visual inspection of the pipe chamber system shall occur once per year until a cleaning
schedule can be established based on the amount of sediment that is left within the system.
Prior to entry into the underground system, the user shall follow all applicable OSHA and
local safety regulations.
STORMWATER MANAGEMENT OPERATION & MAINTENANCE PLAN - 3
Christian Brothers Automotive
Chanhassen, MN
Inspections should occur at least 2-3 days after the most recent rainfall event. The system
should be visually inspected at all manhole locations. Utilizing a sediment pole, measure
and document the amount of silt at each manhole locations. Inspect each pipe opening to
ensure that the silt level or any foreign objects are not blocking the pipes. The sediment
level should be measured and recorded during the inspection process.
The system should be cleaned once the available depth of sediment is 3" above the bottom
of the chambers. Cleaning of the system can be done by a vacuum truck every 3-5 years
based on actual sediment accumulation.
If the facility has standing water more than 48 hours after a rain event, the system shall be
cleaned. To clean, remove the manhole cover at the top of the system and lower a vacuum
hose into one of the rows of the pipe system. Open the manhole at the opposite end of the
system and use sewer jetting equipment to force water in the same row from one end of the
pipe system row to the opposite side. Place the vacuum hose and the sewer jetting
equipment in the next row and repeat the process.
Prior to freezing each year, the stone detention layer shall be cleared of standing water to
prevent freezing and damage to the underground system.
Inspection and Maintenance (per manufacturer recommendations)
Inspect isolator row for sediment. If sediment is at or above 3", clean out isolator row using
the letvac process, vacuum structure sump as required. Replace all covers, grates, filters,
and lids; record observations and actions. Inspect and clean basins and manholes upstream
of the Stormtech system. Refer to manufacturer for complete inspection and maintenance
requirements and recommendations.
Inspect every 6 months during the first year of operation. Adjust the inspection interval
based on previous observations of sediment accumulation and high-water elevations.
Conduct jetting and vactoring annually or when inspection shows that maintenance is
necessary.
WATER REUSE MONITORING AND REPORTING
Water reuse shall be monitored throughout the duration of the irrigation timeframe on a
monthly basis. The volume of water reused onsite for irrigation purposes shall be
calculated and documented to ensure proper function of the stormwater reuse irrigation
equipment. Proper operation and maintenance of all pumps, panels, and other equipment
associated with the stormwater harvest and reuse shall be inspected and maintained in
accordance with Manufacturer's recommendations.
5TORMWATER MANAGEMENT OPERATION & MAINTENANCE PLAN - 4
Christian Brothers Automotive
Chanhassen, MN
MAINTENANCE OF ADS SAYFILTER
See Owner's Manual, Appendix A for operation and maintenance procedures.
MAINTENANCE OF HYDOR INTERNATIONAL DOWNSTREAM DEFENDER
See Owner's Manual, Appendix A for operation and maintenance procedures.
STORMWATER MANAGEMENT OPERATION & MAINTENANCE PLAN - 5
Christian Brothers Automotive
Chanhassen, MN
INSPECTION FORM
BMP #1 Underground Detention Sys em ADS SC-310 StormTech System)
Date:
Time: Weather:
Inspector:
Maintenance Item
Comments on Condition
Actions to be Taken
As Needed
Remove Trash and debris
Stabilize tributary drainage area
when erosion is evident
Inflow and outflow at inlet and
outlet structures are clean
Catch Basins are functioning
properly and free of litter and debris
Semi Annually (Or After several storm events/extreme storm events
Inspect inflow/outflow and pre-
treatment systems for clogging (off-
line systems) and remove any
sediment
Annuall in Fall
Inspect and remove any sediment
and debris build up in pretreatment
areas
Inspect inflow points and surface
for buildup of road sand associated
with spring melt, remove as needed
Note signs of pollution, such as oil
sheens, discolored water, or
unpleasant odors.
Comments and Actions Re uired:
STORMWATER MANAGEMENT OPERATION & MAINTENANCE PLAN - 6
Christian Brothers Automotive
Chanhassen, MN
INSPECTION FORM
stem
BMP #lA Cartridge Filter System ADS Ba Filter S )
Date:
Time:
Weather:
Inspector:
Maintenance Item
Comments on Condition
Actions to be Taken
As Needed
Remove Trash and debris
Stabilize tributary drainage area
when erosion is evident
Inflow and outflow at inlet and
outlet structures are clean
Catch Basins are functioning
properly and free of litter and debris
Semi Annuall Or After several storm events/extreme storm events
Inspect inflow/outflow and pre-
treatment systems for clogging (off-
line systems) and remove any
sediment
Annually in Fall
Inspect and remove any sediment
and debris build up in pretreatment
areas
Inspect inflow points and surface
for buildup of road sand associated
with spring melt, remove as needed
Note signs of pollution, such as oil
sheens, discolored water, or
unpleasant odors.
-Comments and Actions Required.
STORMWATER MANAGEMENT OPERATION & MAINTENANCE PLAN - 7
Christian Brothers Automotive
Chanhassen, MN
INSPECTION FORM
BMP #1B Hydrodynamic Separator (Hydro International Downstream Defender
Date:
Time:
Weather:
Inspector:.._
Maintenance Item
Comments on Condition
Actions to be Taken
As Needed
Remove Trash and debris
Stabilize tributary drainage area
when erosion is evident
Inflow and outflow at inlet and
outlet structures are clean
Catch Basins are functioning
properly and free of litter and debris
Semi Ann . u . ally fOr After several storm events/extreme storm events
Inspect inflow/outflow and pre-
treatment systems for clogging (off-
line systems) and remove any
sediment
Annually in Fail
Inspect and remove any sediment
and debris build up in pretreatment
areas
Inspect inflow points and surface
for buildup of road sand associated
with spring melt, remove as needed
Note signs of pollution, such as oil
sheens, discolored water, or
unpleasant odors.
-Comments and Actions Re wired:
STORMWATER MANAGEMENT OPERATION & MAINTENANCE PLAN - 8
Christian Brothers Automotive
Chanhassen, MN
Appendix A
STORMWATER MANAGEMENT OPERATION & MAINTENANCE PLAN - 9
StormTech®
(1e144 f a 4 f�'lli=an I r (/;1J111V
all n tip <<,�;Lralh
Isolator ° Row
O&M Manual
THE MOST ,A NAME 1N WATER MANAGEMENT SOLUTIONS"'
W
INTRODUCTION
An important component of any Stormwater Pollution Prevention
Plan is inspection and maintenance. The StormTech isolator Row is a
technique to inexpensively enhance Total Suspended Solids (TSS) and
Total Phosphorus (TP) removal with easy access for inspection and
maintenance.
THE ISOLATOR ROW
The Isolator Row is a row of StormTech chambers, either SC-160, SC-
310, SC-310-3, SC-740, DC-780, MC-3500 or MC-4500 models, that is
surrounded with filter fabric and connected to a closely located manhole
for easy access. The fabric -wrapped chambers provide for settling
and filtration of sediment as storm water rises in the Isolator Row and
ultimately passes through the filter fabric. The open bottom chambers
and perforated sidewalls (SC-310, SC 310-3 and SC-740 models) allow
storm water to flow both vertically and horizontally out of the chambers.
Sediments are captured in the Isolator Row protecting the storage areas
of the adjacent stone and chambers from sediment accumulation.
A woven geotextile fabric is placed between the stone and the Isolator
Row chambers. The woven geotextile provides a media for stormwater
filtration, a durable surface for maintenance, prevents scour of the
underlying stone and remains intact during high pressure jetting. A non-
woven fabric is placed over the chambers to provide a filter media for
flows passing through the perforations in the sidewall of the chamber.
The non -woven fabric is not required over the SC-160, DC-780, MC-3500
or MC-4500 models as these chambers do not have perforated side
walls.
The Isolator Row is typically designed to capture the "first flush" and
offers the versatility to be sized on a volume basis or flow rate basis.
An upstream manhole provides access to the Isolator Row and
typically includes a high flow weir. When flow rates or volumes exceed
the Isolator Row weir capacity the water will flow over the weir and
discharge through a manifold to the other chambers.
Another acceptable design uses one open grate inlet structure. Using
a "highllow" design (low invert elevation on the Isolator Row and a higher
invert elevation on the manifold) an open grate structure can provide the
advantages of the Isolator Row by creating a differential between the
Isolator Row and manifold thus allowing for settlement in the Isolator Row.
The Isolator Row may be part of a treatment train system. The design
of the treatment train and selection of pretreatment devices by the
design engineer is often driven by regulatory requirements. Whether
pretreatment is used or not, the Isolator Row is recommended by
StormTech as an effective means to minimize maintenance requirements
and maintenance costs.
Note: See the StormTech Design Manual for detailed information on
designing inlets for a StormTech system, including the Isolator Row.
Looking down the Isolator Row from the
manhole opening, woven geotextile is shown
between the chamber and stone base.
StormTech Isolator Row with
Overflow Spillway (not to scale)
OPTIONAL
PRE-TRFATMFNT
STORMTECH
ISOLATOR ROW
MANHOLE
wrrH
OVERFLOW
WEIR FIR
ECCENTRIC "
HEACER
OPTIONAL \
ACCESS l f _- STORMTECH CHAMBERS
... .e
o-.
INSPECTION
a,
The frequency of inspection and maintenance varies by location. A
routine inspection schedule needs to be established for each individual
location based upon site specific variables. The type of land use (i.e.
industrial, commercial, residential), anticipated pollutant load, percent
imperviousness, climate, etc. all play a critical role in determining the
>a actual frequency of inspection and maintenance practices.
At a minimum, StormTech recommends annual inspections. Initially,
Awe the Isolator Row should be inspected every 6 months for the first year
of operation. For subsequent years, the inspection should be adjusted
based upon previous observation of sediment deposition.
The Isolator Row incorporates a combination of standard manhole(s) and strategically located inspection ports
(as needed). The inspection ports allow for easy access to the system from the surface, eliminating the need to
perform a confined space entry for inspection purposes.
If upon visual inspection it is found that sediment has accumulated, a stadia rod should be inserted to
determine the depth of sediment. When the average depth of sediment exceeds 3 inches throughout the length
of the Isolator Row, clean -out should be performed.
MAINTENANCE
The Isolator Row was designed to reduce the cost of periodic maintenance, By "isolating" sediments to just
one row, costs are dramatically reduced by eliminating the need to clean out each row of the entire storage
bed. If inspection indicates the potential need for maintenance, access is provided via a manhole(s) located on
the end(s) of the row for cleanout. If entry into the manhole is required, please follow local and OSHA rules for a
confined space entries.
Maintenance is accomplished with the JetVac process. The JetVac process utilizes a high pressure water
nozzle to propel itself down the Isolator Row while scouring and suspending sediments. As the nozzle is
retrieved, the captured pollutants are flushed back into the manhole for vacuuming. Most sewer and pipe
maintenance companies have vacuum/JetVac combination vehicles. Selection of an appropriate JetVac nozzle
will improve maintenance efficiency.. Fixed nozzles designed for culverts or large diameter pipe cleaning are
preferable.. Rear facing jets with an effective spread of at least 45" are best. Most JetVac reels have 400 feet
of hose allowing maintenance of an Isolator Row up to 50 chambers long. The JetVac process shall only
be performed on StormTech Isolator Rows that have AASHTO class 1 woven geotextile (as specified by
StormTech) over their angular base stone.
StormTech Isolator Row (not to scale)
Note: Non -woven fabric is only required over the inlet pipe connection into the end cap for SC-16OLP, DC-180, MC-3500 and MC-4500 chamber
models and is not required over the entire Isolator Row.
iG]4D, SGa10' LOVER ENTIRE ISCEATOR ROW WR'H ACS
GEp5YN1HETl�'-s bC1T N,730.T EN MIN
W LE
'c-Ik. 9' IA m)1,IIN WIPE
SC-]i V. 5' (1S mj AIIN WIUE
>AC45 .. RAC-35W, OC3MD. SC
cONN" n"TO
GEOSYNF HETIUS 601T NON 1
SAW QE
RTE OP.1,
[am—] I'll
24. 166am) NUPE ACCESS PIP E AECUIR€O:NG49 ,LVG3M SC-M DC-9a
I (W5m NUPEACCESS PIPE REQUIRED SWI3
9' i2W.) HOPE ACCESS PIPE REQUIRED_ - lfiAl.F
pPTIOM I EK11ON PORT
STORMTECHCHANBER
STORAITECH ENO GAF
MAMUERS, CO IN OOSFAM TEPPIO P SEAMS
;HAt.18€R5, COtiTINtiQllS FABRIC WRHOIP 6€AMS
l30a
B�eS' I2S rn} AUk WIDE: IAG�SdA
5' It.5 ml MIN WIPES OG-TfiT, SG749
4' (I,Z m) IAiN WIDE SG1TA. S11 1
STEP i
Inspect Isolator Row for sediment.
A) Inspection ports (if present)
i. Remove lid from floor box frame
ii. Remove cap from inspection riser
iii. Using a flashlight and stadia rod,measure depth of sediment and record results on maintenance log.
iv. if sediment is at or above 3 inch depth, proceed to Step 2. If not, proceed to Step 3.
B) All Isolator Rows
i. Remove cover from manhole at upstream end of Isolator Row
ii. Using a flashlight, inspect down Isolator Row through outlet pipe
1. Mirrors on poles or cameras may be used to avoid a confined space entry
2. Follow OSHA regulations for confined space entry if entering manhole
iii. If sediment is at or above the Lower row of sidewall holes (approximately 3 inches), proceed to Step 2.
If not, proceed to Step 3.
STEP 2
Clean out Isolator Row using the JetVac process.
A) A fixed floor cleaning nozzle with rear facing nozzle spread of 45 inches or more is preferable
B) Apply multiple passes of JetVac until backflush water is clean
C) Vacuum manhole sump as required
STEP 3
Replace all caps, lids and covers, record observations and actions.
STEP 4
Inspect & clean catch basins and manholes upstream of the StormTech system.
SAMPLE MAINTENANCE LOG
BAYSAVER
TECHNOLOGIES"
BayFilter'"
Design Manual
L
C71136a*-
THE MOST AVVANCED NAME IN WATER MANAGEMENT SOLUTIONS"'
i
Pre -Assembled Manifold
In some areas the vaults can be provided with pre -in-
stalled manifold systems. Please contact your local ADS
or BaySaver representatives for additional details.
Inspection and Maintenance
The BayFilter system requires periodic maintenance
to continue operating at the design efficiency. The
maintenance process is comprised of the removal
and replacement of each BayFilter cartridge,
vertical drain down module; and the cleaning of
the vault or manhole with a vacuum truck.
The maintenance cycle of the BayFilter system will be
driven mostly by the actual solids load on the filter. The
system should be periodically monitored to be certain
it is operating correctly. Since stormwater solids loads
can be variable, it is possible that the maintenance cycle
could be more or less than the projected duration.
BayFilter systems in volume -based applications
are designed to treat the WQv in 24 to 48 hours
initially. Late in the operational cycle of the BayFilter,
the flow rate will diminish as a result of occlusion.
When the drain down exceeds the regulated
standard, maintenance should be performed.
When a BayFilter system is first installed, it is recommended
that it be inspected every six (6) months. When the filter
system exhibits flows below design levels the system should
be maintained. Filter cartridge replacement should also
be considered when sediment levels are at or above the
level of the manifold system. Please contact the BaySaver
Technologies Engineering Department for maintenance
cycle estimations or assistance at 1.800.229.7283.
Maintenance Procedures
1. Contact BaySaver Technologies for replacement filter
cartridge pricing and availability at 1-800-229-7283.
2. Remove the manhole covers and open all
access hatches.
3. Before entering the system make sure the air
is safe per OSHA Standards or use a breathing
apparatus. Use low 0., high CO, or other applicable
warning devices per regulatory requirements.
4. Using a vacuum truck remove any liquid and
sediments that can be removed prior to entry.
5. Using a small lift or the boom of the vacuum truck,
remove the used cartridges by lifting them out.
6. Any cartridges that cannot be readily lifted
can be easily slid along the floor to a location
BayFilter System Cieanout
Vactor Truck Maintenance
Jet Vactoring Through Access Match
they can be lifted via a boom lift.
7. When all the cartridges have been removed, it is
not practical to remove the balance of the solids
and water. Loosen the stainless clamps on the
Fernco couplings for the manifold and remove
the drain pipes as well. Carefully cap the manifold
and the Ferncos and rinse the floor, washing away
the balance of any remaining collected solids.
8. Clean the manifold pipes, inspect, and reinstall.
9. Install the exchange cartridgess and close all covers.
10. The used cartridges may be sent back to
BaySaver Technologies for recycling.
BayFilter Availability and Cost
BayFilter systems are available throughout the
United States from BaySaver Technologies. Material,
installation, and maintenance costs vary with location.
For BayFilter pricing in your area, please contact
BaySaver Technologies at 1-800-229-7283.
BayFilter cartridges and outlet components can be
shipped anywhere in the world. Manholes and precast
vaults are also supplied by BaySaver Technologies as
part of a complete stormwater filtration system.
BayFilter Specifications
Products
A. Internal components: all components including
concrete structure(s), PVC manifold piping
and filter cartridges, shall be provided by
BaySaver Technologies 1-800-229-7283).
B. PVC manifold piping: all internal PVC pipe and
fittings shall meet ASTM D1785. Manifold piping
shall be provided to the contractor pre-cut and/or pre -
assembled. Minor field modifications may be necessary.
C. Filter cartridges: external shell of the filter cartridges
shall be substantially constructed of polyethylene
or equivalent material acceptable to the manufacturer.
Filtration media shall be arranged in a spiral layered
fashion to maximize available filtration area. An orifice
flow control (i.e. flow disk) shall be supplied with each
cartridge to restrict the flow rate to a maximum of
45 gpm (170 I/min).
D. Filter media: filter media shall be a proprietary mix
produced by BaySaver Technologies and may consist
of the following materials: zeolite, perlite, and activated
alumina and/or other materials required to meet the
project pollutant removal requirements.
Manifold Tee View of a Cleaned System
Cartridge Hoist Point
E. Precast concrete vault: concrete structures shall be
provided according to ASTM C478, C858, and C913.
The materials and structural design of the devices shall
be per ASTM C478 and ACl 318. Precast concrete shall
be provided by BaySaver Technologies.
Performance
A. The stormwater filter system shall be capable of
treating 100% of the required treatment flow at full
sediment load conditions.
B. The stormwater filter system's cartridges shall have
no moving parts..
C. The stormwater treatment unit shall be designed to
remove a minimum of 80% of suspended solids,
60% of total phosphorus, 50% of turbidity, 40%® of total
copper, and 40% of total zinc. All filter designs shall
comply with local regulations.
D. The stormwater filtration system shall not have any
components that leach nitrates, phosphates or metals.
E. The stormwater filtration cartridge shall be equipped
with a hydrodynamic backwash mechanism to extend
the filter's life and optimize its performance.
F. The stormwater filtration system's cartridges shall have
a treated sediment capacity for 80% TSS removal
between 150-350 lbs (68159 kg).
When BayFilter is initially installed, we recommend
that an inspection be performed on the system in the
first six (6) months. After that, the inspection cycle
typically falls into an annual pattern given normal
storm occurrence and actual solids loads.
When BayFilter exhibits flows below design levels,
the system should be inspected and maintained as
soon as practical. If flow monitoring is not available,
BayFilter cartridges should be replaced when sediment
levels are at or above the top of the manifold.
THE MOST A81.0NCE0 NAME IN WATER MANAGEMENT SOLUTIONS""
ADS `Terms and Conditmns of Sale"are availahle no the ADS wehsite, m-.w.ads-pipe.com
The ADS logo aiod the Green Stripe are registered Iradenrarks of Advanced Drainage Systems, Inc..
BayRim "' m a registered trademark of BaySavarTechnologias, Inc.
rcr M18 Advanced Drainage Systems, Inc. If 10951 01/ 18 TAH
1-800-821-6710 www.ads-pipe.com
1-800-229-7283 www.baysaver.com
Vortex Separator for Stormwater Treatment Turning Water Around ...I
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94 Hutchins Drive
Portland, ME 04102
Tel: (207) 756-6200
Fax: (207) 756-6212
stormwaterinquiry@hydro-int.com
Turning Water Around ... I
@Hydro International DD_O+M_C1705
Spring Inspection & Maintenance Form Stormwater Harvesting and Use Systems (Example)
System:
Installer Contact:
Catchment Surfaces (roofs, pavement, etc)
Completed
Additional Action Required?
(Describe under fnllaw-up stems)
Collection
Maintenance
By
(initials)
Date
Rooftop
e.g. remove debris, wash surface
Yes / No
Parking
e.g. spring sweeping
Yes / No
Green Space
Yes / No
Collection System and Pre -storage Treatment
Com
Aeted
Additional Action Required?
(Describe under follow-up Remy
Component
Maintenance
By
(initials)
Date
Gutters/gutter guards
e.g. remove debris and sediment accumulations
Yes I No
Downspouts
Yes / No
First Flush Diverter
Yes / No
C85umps
Yes / No
Alf
I e.g. checkjoints and fitting test the system for leaks
Yes / No
etc.
I
Yes J No
Storage (Tank, Pond) and Distribution
Completed
Additional Action Required?
(Describe under follow-up items)
Component
Maintenance
By
(Initials)
Date
All
e.g. testforleaks -
Yes / No
tank inlet
e.g. clean and free of obstruction
Yes / No
Tank
e.g. clean and in good repair
Yes / No
overflow outlet
Yes / No
etc.
Yes f No
Treatment System
Completed
Additional Action Required?
(De%ribeonderfollow-up items)
Component
Maintenance
By
(Initials)
Date
all
Yes / No
Yes / No
Yes / No
etc.
Yes / No
Distribution System
Completed
Additional Action Required?
(Describe underfollow-up items)
Component
Maintenance
By
(Initials)
Date
all
Yes / No
PUMP
e,g, (ail start up per manufacturer's instructions)
Yes / No
woter level sensor
e.g. testper manufacturer's instructions
Yes / No
backflowpreventer
e.g-(testing per locai codes and regulations)
Yes / No
make-upsupply
Yes / No
etc.
i
Yes / No
Inspection Follow-up Items
Notifications
Required
(Installer, city, etc.)
Action Completed
Inspection
Date
Component
Action Required
ay
(In€tlalsl
Date
EXHIBIT B
STORMWATER BMP EXHIBIT
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