HomeMy WebLinkAbout20120309001481 STORM WATER EASEMENT AND MAINT AGREEMENT 10/28/2011MSc' AMEWCAN
Return Address:
City of Auburn
City Clerk
25 West Main
Auburn, WA 98001
2012039
FIRST AMERICAN EAS
Above this line reserved for recording information.
uasi
145 00
STORM WATER EASEMENT AND MAINTENANCE AGREEMENT
FAC05 -0007 & FAC10 -0011
Reference # (if applicable):
N/A
Grantors /Borrowers:
B &J Auburn, LLC
Grantors /Borrowers
S &B HospitalitY, LLC
Grantee /Assignee/Beneficiary-
City of Auburn
Legal Description /STR.
SW '/< SW '/, S18 — T21N — R5E
Assessor's Tax Parcel ID#
182105 -9184 K 182105 -9253 6O
THIS EASEMENT AND AGREEMENT made and entered into this OV day of
0Q —kVEP, , 2011, by and between the City of Auburn, a municipal corporation
of King County, Washington, hereinafter referred to as "CITY" and both
B &J Auburn, LLC and S &B Hospitality, LLC, hereinafter referred to as "PROPERTY
OWNERS"
WHEREAS, PROPERTY OWNERS have applied for certain permits with the
CITY for the construction of I'acihties for the
,lack -In- The -Box / Convenience Store / Fuel Station located at 524 A Street SE and
La Quinta Inn located at 225 6`h Street SE respectively, which create impervious surface;
and
WHEREAS, the PROPERTY OWNERS will complete a storm system, and
WHEREAS, the PROPERTY OWNERS and the CITY desire that the storm system
be maintained to provide adequate facilities for controlling both the quantity and quality of
storm drainage; and
WHEREAS, for maintenance of a storm system it is necessary to have appropriate
right -of -way to bring in equipment to conduct maintenance functions; and
Storm Water Easement and Maintenance Agreement I'aD LIPIP11IFYMR aBLF-DyrfA£1DIOR
Page I of 22 ' " °.4•�•,,Q6` "''t'�' ±@!:'E:RTt':A?'i
WHEREAS, maintenance requirement is a covenant running with the land and
binding upon all heirs, successors and assigns of all parties; and
WHEREAS, the parties desire that this Agreement be recorded to advise heirs,
successors and assigns of both parties as to the existence of this easement and agreement;
and
WHEREAS, an easement is needed to bring in maintenance equipment; and
WHEREAS, the parties are both desirous of permitting inspection of the storm
system to make certain that it is functioning properly and for purposes of determining the
appropriate repairs.
NOW, THEREFORE, BASED UPON MUTUAL COVENANTS TO BE
DERIVED THE PARTIES AGREE AS FOLLOWS.
Section 1, EASEMENT
PROPERTY OWNERS hereby provide a non - exclusive easement to the City for
access, inspection, and maintenance for the purposes of this Agreement and the attached
Storm Water Pollution Prevention Plan, over, under and on that real estate described in
Exhibit "A" & "B" and on that portion of the properties as showing on the approved
Record Drawings revised pursuant to construction records for the City of Auburn under
Permits Nos. FAC05 -0007 and FAC10 -0011, which record drawings are hereby
incorporated by reference as if set out in full. This easement shall be a burden to that real
estate which is legally described and attached as Exhibit "A" & "B" and incorporated
herein by this reference, and shall be a benefit to the City Storm Drainage Utility System.
parties.
Section 2, HEIRS, SUCCESSORS AND ASSIGNS
This Agreement shall be binding upon the heirs, successors and assigns of the
Section 3, MAINTENANCE
The PROPERTY OWNERS agree to maintain the storm system in accordance with
the ordinances and all applicable codes of the CITY and the Stonn Water Pollution
Prevention Maintenance and Operation Schedule attached as Exhibit "C" and incorporated
herein by this reference. The PROPERTY OWNERS do hereby agree that the CITY may
enter onto the properties of the PROPERTY OWNERS via the easement described above
Storm Water Easement and Maintenance Agreement
Page 2 of 22
to inspect and perfonn necessary maintenance if, after the PROPERTY OWNERS are
given notice to maintain, the PROPERTY OWNERS fail to maintain.
Further, the PROPERTY OWNERS agree the CITY may enter onto the properties of
PROPERTY OWNERS via the easement described above to perform emergency
maintenance in the event of the storm system's failure which might result in adverse
impacts on public facilities or private facilities of other property owners. In both events the
PROPERTY OWNERS agree to reimburse the CITY for the costs incurred by the CITY in
maintaining the storm system. Should the CITY incur attorney's fees and /or costs in
enforcing the agreement and /or in maintaining or collecting maintenance fees, the
PROPERTY OWNERS agree to pay reasonable attorney's fees and all costs incurred by
the CITY
Section 4, ACKNOWLEDGMENT OF OTHER ENFORCEMENT ACTIONS
PROPERTY OWNERS acknowledge that there may be liability for violations of
codes that could result in additional fines and /or the possibility of incarceration in addition
to the fees for maintenance should violations occur
_ O -
- C
� It
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-
Storm Water Easement and Maintenance Agreement
Page 3 of 22
EXECUTED as of the date first written above.
La Quinta Inn
225 6th ST SE — Parcel # 182105 -9253
—,-r it ---- /0//f L'11
Authorized Signature Date
A 424
Authorized Signature Date
/0//////
STATE OF WASHINGTON)
) ss
COUNTY OF KING )
I certify I have know or have satisfactory evidence that f( u P t AtbE2 1' S a,P A_
and ( aSo h 41 are the persons who! appeared before me, and
said persons acknowledged that they signed this instrument on oath stated that they were
authorized to execute the instrument and acknowledge as the
mANAgF_P-- & MF— ,ff110 EP_
of S & B Hospitality, LLC, a limited liability company, to be the free and voluntary
act of such party for the uses and purposes mentioned in the instrument.
Dated /0 /11/fl
f
7,
>a
Notary Public in and for the State of
Residing at— PLQ_n, CjokAt4
,z�- My appointment expires tf t
fill,
Storm Water Easement and Maintenance Agreement
Page 4 of 22
EXECUTED as of the date first written above.
Jack —In -Tile -Box / Convenience Store / Fuel Station
524 `A' ST SP — Parcel # 182105 -9184
Authorized Signature Date
Authorized Signature Date
STATE OF WASHINGTON)
) ss
COUNTY OF KING )
I certify I have know or have satisfactory evid nce that &V,\ ye- V-\
and gate the person(s) who appeared before me,
l0d said person(s) acknowledged that they signed this instrument on oath stated that
i /she /they was /were authorized to execute the instrument and acknowledge as the
yi
Ji" of B & J Aiubt n, LLC, a limited liability company, to be the free and voluntary act
of such party for the uses and purposes mentioned in the instrument.
Dated tD l Z-1 Ill
KIMBERLY ANNE BJORKLUND
STATE OF WASHINGTON
NOTARY PUBLIC
MY COMMISSION EXPIRES
03 -25 -15
It-Iyv\h P� 1,
Notary Public in land fo the Stat
Residing at
My appointment expires
Storm Water Easement and Maintenance Agreement
Page 5 of 22
CITY OF AUBURN
1 O /mil (
tm C� arlaw, Storm Drainage Engineer Date
STATE OF WASHINGTON)
)ss.
COUNTY OF KING )
I certify that I know or have satisfactory evidence that Tim Carlaw is the person who
appeared before me, and said person acknowledged that he signed this instrument, on oath
stated that he was authorized to execute the instrument and acknowledged it as the
STORM DRAINAGE ENGINEER of THE CITY OF AUBURN to be the free and
voluntary act of such party for the uses and purposes mentioned in this instrument.
Dated �l q
[ IS /t1b
Pile: #1305
Stoma Water Easement and Maintenance Agreement
Page 6 of 22
and for
BtApttt4��
_ �a \q \N \\\11111111 I
Notary Public in
Residing at
My appointment
��111 OF WASNv`.�.
[ IS /t1b
Pile: #1305
Stoma Water Easement and Maintenance Agreement
Page 6 of 22
and for
EXHIBIT `A'
Parcel 182105 -9184:
PROPOSED PARCEL `A' LEGAL DESCRIPTION PER AUBURN LOT LINE
ADJUSTMENT NO LLA05 -0004, AS RECORDED UNDER RECORDING NUMBER
20050321002151 RECORDS OF KING COUNTY, WASHINGTON
SITUATE IN THE CITY OF AUBURN, COUNTY OF KING, STATE OF
WASHINGTON
Parcel 182105 -9253:
PROPOSED PARCEL 'B' LEGAL DESCRIPTION PER AUBURN LOT LINE
ADJUSTMENT NO LLA05 -0004, AS RECORDED UNDER RECORDING NUMBER
20050321002151, RECORDS OF KING COUNTY, WASHINGTON
SITUATE IN THE CITY OF AUBURN, COUNTY OF KING, STATE OF
WASHINGTON
Storm Water Easement and Maintenance Agreement
Page 7 of 22
EXHIBIT `B'
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C C I C C C C C C I C C C
Storm Water Easement and Maintenance Agreement
Page 8 of 22
EXHIBIT `C'
STORM WATER POLLUTION PREVENTION
MAINTENANCE and OPERATION SCHEDULE
for
La Quinta Inn
SEPA NO.
SEP10 -0027
FAC NO.
FAC10 -0011
GRA NO
GRA10 -0014
and
Jack -In- The -Box / Convenience Store / Fuel Station
SEPA NO.
SEP04 -0030
FAC NO
FAC05 -0007
GRA NO
GRA04 -0026
Site Address:
Both projects are located in SW '/4, SW '/4, Section 18, Township 21 North,
Range 5 East, W M. The La Quinta Inn project is located at
225 6th Street SE, Auburn, WA 98002, and the tax parcel number is
182105 -9253. The Jack -In- The -Box / Convenience Store / Fuel Station
project is located at 524 'A' Street SE, WA 98002, and the tax parcel
number is 182105 -9184
Introduction:
This storm drainage technical information report has been prepared to
address the City of Auburn's site development and storm drainage
requirements for the proposed La Quinta Inn located at 225 6'h Street SE
and already constructed Jack -In -The Box / Convenience Store / Fuel
Station located at 524 'A' Street SE. The site has a combined total area
of approximately 2.28 acres, and is mostly built up although the
La Quinta Inn site (approximately 0 85 acres) is mostly vacant, other than a
detention pond at the NW corner of that parcel.
Stonn Water Easement and Maintenance Agreement
Page 9 of 22
The subject site for the Jack -In- The -Box / Convenience Store / Fuel Station
was developed for the retail use it currentlYt serves, along with improving
the street frontage for the property along 6 h Street SE to City standards,
and providing for the overall storm treatment for both parcels when fully
developed
The subject site for the La Quinta Inn will be developed for hotel use, in line
with the heavy commercial zoning The existing detention pond will be
reshaped at the access ramp to provide access around the back side of the
building, the sidewalk fronting 6th Street SE will be improved to City
standards, and the east access will be replaced with two new access points
from neighbor parcel to the east.
According to the City of Auburn's Construction Standards for storm water
management, the city requires storm water quantity and quality control to all
proposed developments We have proposed to collect all of the storm
water runoff from the landscaped, building and pavement areas in a series
of catch basins. This water will be conveyed by storm drainage pipe to a
storm water detention pond located within the Northwest portion of the La
Quinta Inn parcel. A control structure restricts the discharge rate to meet
the detention design criteria of the City of Auburn — detain the volume
created from releasing half the existing 2 -year, 10, 25, and 100 -year storm
events, while holding the developed 2 -year, 10, 25, and 100 -year storm
volumes. A Vortechs® treatment vault is installed after the south outlet
from the pond, on the Jack -In- The -Box / Convenience Store / Fuel Station
parcel, to treat all site runoff prior to discharge to the City storm trunk -line
within 6th Street SE. In the event of failure to overcapacity of the treatment
facility, a gravity overflow will occur at the northwest driveway onto "A"
Street SE.
Plan Goal:
The specific purpose for the storm water facility is to minimize pollution that
is typically associated with modern development. In general, pollution from
motor vehicles and pollution generated from erosion. Attached to this
narrative is a maintenance manual, which offers guidelines to the owner for
storm water facility maintenance.
Storm Water Easement and Maintenance Agreement
Page 10 of 22
Prevention BMP'S:
The catch basins shall have stenciled on them "DUMP NO WASTE —
DRAINS TO STREAM." The owner shall be responsible for sweeping the
lot, installing storm drainage stenciling and provide spill control procedures
In case of spill call DOE at 1- 425 - 649 -7000 The catch basins,
detention /wetpond, and control structures will be visually inspected for
accumulation of debris and silt and will be maintained as required by this
pollution prevention plan and attachments.
Maintenance Standards for Drainage Facilities (from the Department of
Ecology Storm Water Manual, February 2005)
No 1 — Detention Pond
No 4 — Control Structure /Flow Restrictor
No 5 —Catch Basins
Vortechs Treatment Vault
Treatment BMP'S:
A Vortechs® treatment vault has been installed to treat runoff for
conventional pollutants. The treatment vault was designed to the post -
detention discharge for the 2 -year storm event (water quality storm) for
water quality treatment. Since the treatment vault capacity far exceeds this
design treatment rate, the system will be designed to treat 1 4 cfs (max.
allowable vault design treatment = 1 6 cfs)
Inspection /Maintenance.
Regular inspections of the drainage facilities should be carried out twice per
year, in the spring and fall. The responsible party should keep records of
these inspections available for review by the City Additional inspections
may be required after severe storms.
Routine maintenance of the site will include mowing, care of landscaping
and the removal of trash and debris from the drainage system The parking
lots and driveways should be kept clean and in repair. Events such as
major storms or heavy winds will require immediate inspections for
damages
Storm Water Easement and Maintenance Agreement
Page I I of 22
To ensure proper water quality and treatment, the detention pond and
Vortechs® system must be properly maintained. Be careful to avoid
introducing landscape fertilizer to receiving waters or groundwater
Catch basins shall be cleaned when sump is 1/3' full of sediment or debris.
Person of Responsibility:
La Quinta Inn:
S &B Hospitality, LLC
Satpal Sohal
9322 South 216th Place
Kent, WA 98031
(206) 229 -5246
Design Engineer:
La Quinta Inn.
W B Wells & Associates, Inc.
Mark A. Zeman, PE
4230 NE Fremont Street
Portland, OR 97213
(503) 284 -5896
Plan and /or Information Updates:
Jack -In- The -Box:
B &J Auburn, LLC
Su Yong Yen
5892 169th Avenue SE
Bellevue, WA 98006
sam @yenintl.com
Jack -In- The -Box:
Terraforma Design Group, Inc.
Pedro DeGuzman
521237 th Avenue SW
Seattle, WA 98126
(206) 923 -0590
The City of Auburn Storm Drainage Utility section is to review and approve
any changes to this Storm Water Pollution Prevention Plan prior to changes
in its implementation. Additionally, any changes in ownership or person of
responsibility are to be reported to the City Storm Drainage Utility section
(Changes to ownership shall be reported to the City of Auburn's Utilities
Section)
Storm Water Easement and Maintenance Agreement
Page 12 of 22
INSPECTION / MAINTENANCE CHECKLIST
STRUCTURE
i
DATE OF INSPECTION /MAINTENANCE
I
I
Results/
Maintenance
Date
Inspection
All Catch Basins
Results
Maintenance
Done
Storm Detention
Inspection
Pond
Results
Maintenance
Done
Inspection
Conveyance Pipes
Results
Maintenance
Done
Flow Control
Inspection
Structure
Results
Maintenance
Done
Vortechs
Inspection
Treatment Vault
Results
Maintenance
Done
Maintenance Standards for Drainage Facilities:
The facility- specific maintenance standards contained in this section are
intended to be conditions for determining if maintenance actions are
required as identified through inspection They are not intended to be
measures of the facility's required condition at all times between
inspections. In other words, exceeding these conditions at any time
between inspections and /or maintenance does not automatically constitute
a violation of these standards.
Storm Water Easement and Maintenance Agreement
Page 13 of 22
However, based upon inspection observations, the inspection and
maintenance schedules shall be adjusted to minimize the length of time
that a facility is in a condition that requires a maintenance action.
No.1 — Detention Ponds
Maintenance
Defect
Conditions When Maintenance Is
Results Expected When
Component
Needed
Maintenance Is Performed
General
Trash & Debris
Any trash and debris which exceed 5
Trash and debris cleared from
cubic feet per 1,000 square feet (this
site.
is about equal to the amount of trash it
would take to fill up one standard size
garbage can). In general, there
should be no visual evidence of
dumping.
If less than threshold all trash and
debris will be removed as part of next
scheduled maintenance.
Poisonous
Any poisonous or nuisance vegetation
No danger of poisonous
Vegetation and
which may constitute a hazard to
vegetation where maintenance
noxious weeds
maintenance personnel or the public.
personnel or the public might
normally be. (Coordinate with
Any evidence of noxious weeds as
local health department )
defined by State or local regulations
Complete eradication of
(Apply requirements of adopted IPM
noxious weeds may not be
policies for the use of herbicides).
possible. Compliance with
State or local eradication
policies required.
Contaminants
Any evidence of oil, gasoline,
No contaminants or pollutants
and Pollution
contaminants or other pollutants.
present
(Coordinate removal /cleanup with
local water quality response agency).
Rodent Holes
Any evidence of rodent holes if facility
Rodents destroyed and dam or
is acting as a dam or berm, or any
berm repaired (Coordinate
evidence of water piping through dam
with local health department,
or berm via rodent holes.
coordinate with Ecology Dam
Safety Office if pond exceeds
10 acre - feet.)
Stone Water Easement and Maintenance Agreement
Page 14 of 22
No. 1 - Detention Ponds
Maintenance
Defect
Conditions When Maintenance Is
Results Expected When
Component
Needed
Maintenance Is Performed
Beaver Dams
Dam results in change or function of
Facility is returned to design
the facility
function
(Coordinate trapping of beavers
and removal of dams with
appropriate permitting
agencies.)
Insects
When insects such as wasps and
Insects destroyed or removed,
hornets interfere with maintenance
from site.
activities
Apply insecticides in
compliance with adopted IPM
policies.
Tree Growth
Tree growth does not allow
Trees do not hinder
and Hazard
maintenance access or interferes with
maintenance activities.
Trees
maintenance activity (i e , slope
Harvested trees should be
mowing, silt removal, vactoring, or
recycled into mulch or other
equipment movements). If trees are
beneficial uses (e g., alders for
not interfering with access or
firewood)
maintenance, do not remove.
Remove hazard trees.
If dead, diseased, or dying trees are
i
identified.
(Use a certified Arborist to determine
health of tree or removal
requirements.)
Side Slopes
Erosion
Eroded damage over 2 inches deep
Slopes should be stabilized
of Pond
where cause of damage is still present
using appropriate erosion
or where there is potential for
control measure(s); e g , rock
continued erosion.
reinforcement, planting of
grass, compaction.
Any erosion observed on a compacted
berm embankment.
If erosion is occurring on
compacted berms a licensed
civil engineer should be
consulted to resolve source of
erosion.
Storage Area
Sediment
Accumulated sediment that exceeds
Sediment cleaned out to
10% of the designed pond depth
designed pond shape and
unless otherwise specified or affects
depth, pond reseeded if
inletting or outletting condition of the
necessary to control erosion
facility
Liner (If
Liner is visible and has more than
Liner repaired or replaced.
Applicable)
three 1/4 -inch holes in it.
Liner is fully covered.
Storm Water Easement and Maintenance Agreement
Page 15 of 22
No.1 - Detention Ponds
Maintenance
Defect
Conditions When Maintenance Is
Results Expected When
Component
Needed
Maintenance Is Performed
Pond Berms
Settlements
Any part of berm that has settled 4
Dike is built back to the design
(Dikes)
inches lower than the design
elevation
elevation.
If settlement is apparent, measure
berm to determine amount of
settlement.
Settling can be an indication of more
severe problems with the berm or
outlet works. A licensed civil engineer
should be consulted to determine the
source of the settlement.
Piping
Discernable water flow through pond
Piping eliminated. Erosion
berm. Ongoing erosion with potential
potential resolved.
for erosion to continue
(Recommend a Goethechnical
engineer be called in to inspect and
evaluate condition and recommend
repair of condition
Emergency
Tree Growth
Tree growth on emergency spillways
Trees should be removed. If
Overflow/
creates blockage problems and may
root system is small (base less
Spillway and
cause failure of the berm due to
than 4 inches) the root system
Berms over 4
uncontrolled overtopping,
may be left in place Otherwise
feet in height.
the roots should be removed
Tree growth on berms over 4 feet in
and the berm restored A
height may lead to piping through the
licensed civil engineer should
berm which could lead to failure of the
be consulted for proper
berm
berm /spillway restoration.
Piping
Discernable water flow through pond
Piping eliminated Erosion
berm Ongoing erosion with potential
potential resolved.
for erosion to continue
(Recommend a Goethechnical
engineer be called in to inspect and
evaluate condition and recommend
repair of condition.
Emergency
Emergency
Only one layer of rock exists above
Rocks and pad depth are
Overflow/
Overflow/
native soil in area five square feet or
restored to design standards.
Spillway
Spillway
larger, or any exposure of native soil
at the top of out flow path of spillway
(Riprap on inside slopes need not be
replaced.)
Erosion
See "Side Slopes of Pond "
Storin Water Easement and Maintenance Agreement
Page 16 of 22
No. 4 - Control StructurelFlow Restrictor
Maintenance
Defect
Condition When Maintenance is
Results Expected
Component
Needed
When Maintenance is
Performed I
General
Trash and Debris
Material exceeds 25% of sump depth or 1
Control structure orifice
(Includes
foot below orifice plate.
is not blocked. All trash
Sediment)
and debris removed.
Structural Damage
Structure is not securely attached to
Structure securely
manhole wall.
attached to wall and
outlet pipe
Structure is not in upright position (allow
Structure in correct
up to 10% from plumb)
position.
Connections to outlet pipe are not
Connections to outlet
watertight and show signs of rust.
pipe are watertight;
structure repaired or
replaced and works as
designed
Any holes, other than designed hales, in
Structure has no holes
the structure
other than designed
holes.
Cleanout
Damaged or
Cleanout gate is not watertight or is
Gate is watertight and
Gate
Missing
missing
works as designed
One maintenance person cannot move up
Gate moves up and
and down gate.
down easily and is
watertight.
Chain /rod leading to gate is missing or
Chain is in place and
damaged.
works as designed.
Gate is rusted over 50% of its surface
Gate is repaired or
area.
replaced to meet design
standards
Orifice Plate
Damaged or
Control device is not working properly due
Plate is in place and
Missing
to missing, out of place, or bent orifice
works as designed
plate.
Obstructions
Any trash, debris, sediment, or vegetation
Plate is free of all
blocking the plate.
obstructions and works
as designed.
Overflow Pipe
Obstructions
Any trash or debris blocking (or having
Pipe is free of all
the potential of blocking) the overflow
obstructions and works
pipe
as designed.
Manhole
See 'Closed
See "Closed Detention Systems' (No 3)
See "Closed Detention
Detention Systems'
Systems' (No 3)
(No. 3).
Catch Basin
See "Catch Basins'
See Catch Basins" (No. 5)
See "Catch Basins' (No.
(No. 5).
1
5).
Storm Water Easement and Maintenance Agreement
Page 17 of 22
No. 5 — Catch Basins
Maintenance
Defect
Conditions When Maintenance is Needed
Results Expected
Component
When Maintenance is
performed
General
Trash & Debris
Trash or debris which is located immediately
No Trash or debris
in front of the catch basin opening or is
located immediately in
blocking inletting capacity of the basin by
front of catch basin or on
more than 10%
grate opening
Trash or debris (in the basin) that exceeds 60
No trash or debris in the
percent of the sump depth as measured from
catch basin.
the bottom of basin to invert of the lowest pipe
into or out of the basin, but in no case less
than a minimum of six inches clearance from
the debris surface to the invert of the lowest
pipe.
Trash or debris in any inlet or outlet pipe
Inlet and outlet pipes
blocking more than 1/3 of its height
free of trash or debris.
Dead animals or vegetation that could
No dead animals or
generate odors that could cause complaints or
vegetation present within
dangerous gases (e.g., methane).
the catch basin.
Sediment
Sediment (in the basin) that exceeds 60
No sediment in the catch
percent of the sump depth as measured from
basin.
the bottom of basin to invert of the lowest pipe
into or out of the basin, but in no case less
than a minimum of 6 inches clearance from
the sediment surface to the invert of the
lowest pipe.
Structure
Top slab has holes larger than 2 square
Top slab is free of holes
Damage to
inches or cracks wider than 1/4 inch.
and cracks.
Frame and /or
Top Slab
(Intent is to make sure no material is running
into basin)
Frame not sitting flush on top slab, i.e.,
Frame is sitting flush on
separations of more than 3/4 inch of the frame
the riser rings or top slab
from the top slab. Frame not securely
and firmly attached.
attached
Fractures or
Maintenance person judges that structure is
Basin replaced or
Cracks in
unsound,
repaired to design
Basin Walls/
standards
Bottom
Grout fillet has separated or cracked wider
Pipe is regrouted and
than 1/2 inch and longer than 1 foot at the joint
secure at basin wall.
of any inlet/outlet pipe or any evidence of soil
particles entering catch basin through cracks
Settlement/
If failure of basin has created a safety,
Basin replaced or
Misalignment
function, or design problem.
repaired to design
standards.
Vegetation
Vegetation growing across and blocking more
No vegetation blocking
than 10% of the basin opening
opening to basin
Storm Water Easement and Maintenance Agreement
Page 18 of 22
No. 5 —Catch Basins
Maintenance
Defect
Conditions When Maintenance is Needed
Results Expected
Component
When Maintenance is
performed
Vegetation growing in mletloutlet pipe joints
No vegetation or root
that is more than six inches tall and less than
growth present
six inches apart.
Contamination
See "Detention Ponds" (No. 1).
No pollution present.
and Pollution
Catch Basin
Cover Not in
Cover is missing or only partially in place Any
Catch basin cover is
Cover
Place
open catch basin requires maintenance.
closed.
Locking
Mechanism cannot be opened by one
Mechanism opens with
Mechanism
maintenance person with proper tools. Bolts
proper tools.
Not Working
into frame have less than 1/2 inch of thread
Cover Difficult
One maintenance person cannot remove lid
One maintenance person
to Remove
after applying normal lifting pressure.
can remove cover
(Intent is keep cover from sealing off access to
maintenance.)
Ladder
Ladder Rungs
Ladder is unsafe due to missing rungs, not
Ladder meets design
Unsafe
securely attached to basin wall, misalignment,
standards and allows
rust, cracks, or sharp edges.
maintenance person
safe access.
Metal Grates
Grate opening
Grate with opening wider than 7/8 inch.
Grate opening meets
(If Applicable)
Unsafe
design standards
Trash and
Trash and debris that is blocking more than
Grate free of trash and
Debris
20% of grate surface inletting capacity
debris.
Damaged or
Grate missing or broken member(s) of the
Grate is in place and
Missing.
grate
meets design standards
Storm Water Easement and Maintenance Agreement
Page 19 of 22
Vortechs® Treatment Vault
Maintenance
Defect
Condition When Maintenance is
Results Expected When
Component
Needed
Maintenance is Performed
Below
Sediment
Sediment depth exceeds 12- inches in first
No sediment deposits in vault
Ground Vault
Accumulation
chamber Should be inspected every 3
bottom of first chamber
in Vault
months.
Trash /Debris
Trash and debris accumulated on
Trash and debris removed
Accumulation
compost filter bed.
from the compost filter bed.
Access Cover
Cover cannot be opened; one person
Cover repaired to proper
Damaged /Not
cannot open the cover using normal lifting
working specifications or
Working
pressure, corrosion /deformation of cover
replaced.
Vault Structure
Cracks wider than 1/2 -inch or evidence of
Vault replaced or repairs
Includes
soil particles entering the structure
made so that vault meets
Cracks in Wall,
through the cracks, or
design specifications and is
Bottom,
maintenance/inspection personnel
structurally sound
Damage to
determine that the vault is not structurally
Frame and /or
sound
Top Slab
Cracks wider than 1/2 -inch at the joint of
Vault repaired so that no
any inletloutlet pipe or evidence of soil
cracks exist wider than 1/4-
particles entering through the cracks.
inch at the joint of the
inlet/outlet pipe.
Baffles / Weirs
Baffles / weirs corroding, cracking
Baffles repaired or replaced
warping, and /or showing signs of failure
to specifications
as determined by maintenance /
inspection person.
For further reference, Vortechs(D System Maintenance manual is online at
http.//www.contech-
cpi. com/ Desktoi)Modules /Bring2mind /DMX /Download.aspx ?Command =Core Do
wnload &Entryld = 2938 &Portalld= 0 &Tabld =144, including the following information.
The Vortechs® system should be inspected at regular intervals and maintained
when necessary to ensure optimum performance. The rate at which the system
collects pollutants will depend more heavily on site activities than the size of the
unit, e.g., unstable soils or heavy winter sanding will cause the swirl chamber to fill
more quickly but regular sweeping will slow accumulation.
Inspection
Inspection is the key to effective maintenance and is easily performed Pollutant
deposition and transport may vary from year to year and regular inspections will
help ensure that the system is cleaned out at the appropriate time Inspections
should be performed twice per year (i.e spring and fall) however more frequent
inspections may be necessary in equipment wash down areas and in climates
where winter sanding operations may lead to rapid accumulations. It is useful and
often required as part of a permit to keep a record of each inspection
Storm Water Easement and Maintenance Agreement
Page 20 of 22
A simple inspection and maintenance log form for doing so is available on
contechstormwater com.
The Vortechs system should be cleaned when inspection reveals that the
sediment depth has accumulated to within 12 to 18 inches of the dry- weather
water surface elevation. This determination can be made by taking two
measurements with a stadia rod or similar measuring device, one measurement
from the manhole opening to the top of the sediment pile and the other from the
manhole opening to the water surface Note To avoid underestimating the
volume of sediment in the chamber, the measuring device must be carefully
lowered to the top of the sediment pile Finer, silty particles at the top of the pile
typically offer less resistance to the end of the rod than larger particles toward the
bottom of the pile
Cleaning
Cleaning of the Vortechs° system should be done during dry weather conditions
when no flow is entering the system Clean -out of the Vortechs° system with a
vacuum truck is generally the most effective and convenient method of excavating
pollutants from the system If such a truck is not available, a "clamshell' grab may
be used, but it is difficult to remove all accumulated pollutants using a "clamshell
In installations where the risk of petroleum spills is small, liquid contaminants may
not accumulate as quickly as sediment. However, an oil or gasoline spill should
be cleaned out immediately Motor oil and other hydrocarbons that accumulate on
a more routine basis should be removed when an appreciable layer has been
captured. To remove these pollutants, it may be preferable to use absorbent pads
to solidify the oil since these pads are usually much easier to remove from the unit
individually and less expensive to dispose of than the oil /water emulsion that may,
be created by vacuuming the oily layer Floating trash can be netted out if you
wish to separate it from the other pollutants.
Cleaning of a Vortechs system is typically done by inserting a vacuum hose into
the swirl chamber and evacuating this chamber of water and pollutants As water
is evacuated, the water level outside of the swirl chamber will drop to a level
roughly equal to the crest of the lower aperture of the swirl chamber The water
outside the swirl chamber should remain near this level throughout pumping as
the bottom and sides of the swirl chamber are sealed to the tank floor and walls.
This "water lock" feature prevents water from migrating into the swirl chamber,
exposing the bottom of the baffle wall and crating excess pump -out volume.
Floating pollutants will decant into the swirl chamber as the water level is drawn
down. This allows most floating material to be withdrawn from the same access
point above the swirl chamber
Storm Water Easement and Maintenance Agreement
Page 21 of 22
Floating material that does not decant into the swirl chamber during draw down
should be skimmed from the baffle chamber If maintenance is not performed as
recommended, sediment may accumulate outside the swirl chamber If this is the
case, it may be necessary to pump out other chambers. It is advisable to check
for sediment accumulation in all chambers during inspection and maintenance
These maintenance recommendations apply to all Vortechs systems with the
following exceptions
1 It is strongly recommended that when cleaning systems larger than the Model
16000 the fable chamber be drawn down to depth of three feet prior to
beginning clean -out of the swirl chamber Drawing down this chamber prior to
the swirl chamber reduces adverse structural forces pushing upstream on the
swirl chamber once that chamber is empty
2. Entry into a Vortechs® system is generally not required as cleaning can be
done from the ground surface However, if manned entry into a system is
required the entire system should be evacuated of water prior to entry
regardless of the system size
Manhole covers should be securely seated following cleaning activities to prevent
leakage of runoff into the system from above and also to ensure proper safety
precautions. If anyone physically enters the unit, Confined Space Entry
procedures need to be followed.
Disposal of all material removed from the Vortechs® system should be done in
accordance with local regulations. In many locations, disposal of evacuated
sediments may be handled in the same manner as disposal of sediments
removed from catch basins or deep sump manholes Check your local regulations
for specific requirements on disposal.
For assistance with maintaining your Vortechs system, contact us regarding the
CONTECH Maintenance Compliance Certification Program
Storm Water Easement and Maintenance Agreement
Page 22 of 22