HomeMy WebLinkAbout20150807000633 STORM WATER EASEMENT AND MAINT AGREEMENT 05/11/2015 N €. of -2I- o9 o3ok
Return Address: 111 I 111 III 111 I II II II II 1111 II II II
City of Auburn
City Clerk
•
25 West Main
Auburn,WA 98001 20150807000633
FIRST RIIERICAN EAS 174.00
PAGE-001 OF 031
08/07/2015 12:02
KING COUNTY, WA
•
Above this line reserved for recording information.
STORM WATER EASEMENT AND MAINTENANCE AGREEMENT
GRA14-0032 /BLD14-0362
Reference # (if applicable):
Grantor/Borrower: HEBERT `B' STREET, LLC
Grantee/Assignee/Beneficiary: CITY OF AUBURN
Legal Description/STR: Lot 4 Of The City Of Auburn Short Plat#Sp108-0012
Per King County Re. No. 20090514900001, Said Short
Nat Being Located In Lot 1 Block 4 Of The
Christopher Garden Tracts, King County WA
Assessor's Tax Parcel ID#: 158060-0235
THIS EASEMENT AND AGREEMENT made and entered into this 11 day of
1114.v , 2015, by and between the City of Auburn, a municipal corporation of
King County, Washington, hereinafter referred to as "CITY" and
Henry Hebert hereinafter referred to as "PROPERTY OWNER".
WHEREAS, PROPERTY OWNER has applied for certain permits with the CITY
for the construction of facilities for Hebert B Street Lot 4 located at 3514 B St NW,
which create impervious surface; and
WHEREAS, the PROPERTY OWNER will complete a storm system; and
WHEREAS, the PROPERTY OWNER 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
WHEREAS, maintenance requirement is a covenant running with the land and
binding upon all heirs, successors and assigns of both parties; and
Storm Water Easement and Maintenance Agreement Sa>d Vin^':n me WAIF'fPI.r$et
Page 1 of 31 ritrarn I e,:o..111)aOdatiOnor'i1v,
It has not been examined As ec1
proper execution or as to its effe,t
EXCISE TAX NOT REQUIRED upon title.
Kin! Co. R_.•.., D' Isione
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 OWNER hereby provides 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 property as showing on the approved Record
Drawings revised pursuant to construction records for the City of Auburn under Permit No.
GRA14-0032, 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.
Section 2, HEIRS, SUCCESSORS AND ASSIGNS
This Agreement shall be binding upon the heirs, successors and assigns of the
parties.
Section 3, MAINTENANCE
The PROPERTY OWNER agrees to maintain the storm system in accordance with
the ordinances and all applicable codes of the CITY and the Storm Water Pollution
Prevention Maintenance and Operation Schedule attached as Exhibit "C" and incorporated
herein by this reference. The PROPERTY OWNER does hereby agree that the CITY may
enter onto the property of the PROPERTY OWNER via the easement described above to
inspect and perform necessary maintenance if, after the PROPERTY OWNER is given
notice to maintain, the PROPERTY OWNER fails to maintain. Further, the PROPERTY
OWNER agrees the CITY may enter onto the property of PROPERTY OWNER via the
easement described above to perform emergency maintenance in the event of the storm
system's failure which might result in adverse impacts(s) on public facilities or private
facilities of other property owners. -
Storm Water Easement and Maintenance Agreement
Page 2 of 31
•
•
•
In both events the PROPERTY OWNER agrees 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 OWNER agrees to pay reasonable attorney's fees and
all costs incurred by the CITY.
Section 4, ACKNOWLEDGMENT OF OTHER ENFORCEMENT ACTIONS
PROPERTY OWNER acknowledges 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.
EXECUTED as of the date first written above.
' , �'� 21 20\S
• Owner Date
�gnLt.C2:r�s� l'nptn&pr
Owner Date
STATE OF WASHINGTON)
) ss
COUNTY OF KING
I certify I know or have satisfactory evidence that iar,t / W{gip' t;
is/arm, the person(s) who appeared}.b?toreine;',and said
person(s) acknowledged that he/she/they signed this instrument s n oath :stated;,that
he/she/they was/were authorized to execute the instrument and>'acllhow�edge.4s; the
ofhc.e ,tut;n• , rsrf•-a and a s " • ..
g • - a limited liaI5ilityocor�pany;`to be the
free and voluntary act of such party for the uses and purposes ment pri d`in:the,i i ttrun ent.
Dated Ear-, t)OIS
Notary Public " '`��
State of Washington t« fr. /-0,4;
Marti M McGibbon No ry Public in and for the State of Washington
Commission ExpiriaS 02-154 ding at itoptp UbItttcj IA .)F)
• Is , appointment expires 91-1 S'a0 1 ?
Storm Water Easement and Maintenance Agreement
Page 3 of 31
CITY OF AUBURN
tn Carlaw, 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 tl / tS
J
,,1t1,,, ,C A AA ¶ A �J
—r 8 q I
QIM+ �4¢ Notary Public in and for the Sate of Washington
1 fig. . = ) z Residing at --�tM ee (xDo-r1 ?`I
see . au J'���O 3 My appointment expires t I /t y/kC
tP '
/441 St0F W P"
..,-.] `t":''V o e i2 t !
ST/tlb I notiGi3OM M i rYEt`st j
File: ; 't?"•,f1 t�` 4 ,io e&ri Q)li•
REF.H:\Development\Projects\1lebert'13' Street LLC LOT 4 Building\GRAt40032WegaPDocuriie`nts'\2015
Storm Water Easement and Maintenance Agreement
Page 4 of 31
EXHIBIT `A'
LOT 2 LEGAL DESCRIPTION
LOT 2 OF THE CITY OF AUBURN SHORT PLAT #SPL08-0012 PER K.C. REC. NO.
20090514900001, SAID SHORT PLAT BEING LOCATED IN LOT 1 BLOCK 4 OF
THE CHRISTOPHER GARDEN TRACTS, KING COUNTY, WA.
LOT 3 LEGAL DESCRIPTION
LOT 3 OF THE CITY OF AUBURN SHORT PLAT #SPLOS-0012 PER K.C. REC. NO.
20090514900001, SAID SHORT PLAT BEING LOCATED IN LOT 1 BLOCK 4 OF
THE CHRISTOPHER GARDEN TRACTS, KING COUNTY, WA.
LOT 4 LEGAL DESCRIPTION
LOT 4 OF THE CITY OF AUBURN SHORT PLAT#SPLOS-0012 PER K.C. REC. NO.
20090514900001, SAID SHORT PLAT BEING LOCATED IN LOT 1 BLOCK 4 OF
THE CHRISTOPHER GARDEN TRACTS, KING COUNTY, WA.
Storm Water Easement and Maintenance Agreement
Page 5 of 31
S 69'48'36.86' :6%23)7_5— — — 407.254' — —
I '<
t LT 2 1
I
0230 0 � I 1
o fS 8N
=1 �/I 1z.oc'� 895115.11" E ti
121.195 �}-- —=r— 185•006'
t S 89'58'06.85' E 1D0003'
DETENTION m
GALLERY, I o
�I -,.; ,.; TIP. 01 (3) IN
LOT 4
LOT 3
AI
CL3 ' �23� � -� .
(623:-.) M
I l I
NI , �
DISCHARGE CONTROL
TO WETLAND STRUCTURE — I —' -^
100.00' . .� 1ba 008
N 89'47'35.83' W; --m r_-_ '.:.v.;_-2 2
1 DETENTION
EC0-STORM/ PIPE
ECO-STORM PLUS (24)
laW.Q.
SITE EXHIBIT B fi
1"=80'
I
•
Storm Water Easement and Maintenance Agreement
Page 6 of 31
EXHIBIT `C'
STORM WATER POLLUTION PREVENTION PLAN
MAINTENANCE and OPERATION SCHEDULE
for
Hebert B Street Lot 4
Building Expansion
GRA14-0032
Site Address:
The project is located in NE 'h of Section 1, T21N, R4E, W.M., at 3514 B
Street N.W. in Auburn WA. The tax parcel number is 158060-0235.
Introduction:
This storm water pollution prevention plan has been prepared to address
the City of Auburn's site development and storm drainage requirements for
the proposed Hebert B Street Lot 4 Building Expansion project located at
3514 B Street NW. The project proposes to expand the prior building
permitted under GRA13-0023 by adding additional building area to the
North & South ends of the building. The total building area proposed is
19,552sf versus'the previous 11,656sf building, along with associated
paving, parking and landscaping on the 0.59 acre site. The site has
previously been graded & stabilized and a 94' x 124' slab poured for the
previously permitted building.
The existing storm system was installed under GRA13-0015 and consists
of(3) quarry rock detention galleries, and off-sae conveyance/discharge
and water quality. The existing detention galleries are located north &
south of the building permitted on the site as well as on the adjacent site to
the East. The current proposal will required the detention gallery south of
the building be eliminated and the gallery north of the building to be
reduced from 64' x 85' to 35' x 85'. Additional off-site detention volume will
be provided by adding a new 24' x 146' detention gallery to the southeast of
the site, replacing the downstream conveyance pipe with detention pipe,
and relocating the control structure adjacent to the existing water quality
system. The water quality and discharge will remain as previously
constructed utilizing a Royal Environmental Systems, Inc ecoStorm /
Storm Water Easement and Maintenance Agreement
Page 7 of 31
ecoStrom plus treatment train with high flows by-passing the water quality
system by using a flow splitter manhole.
Storm runoff is detained, filtered and discharged to an off-site wetland area
to the west of the site, and then to the public storm system in B Street NW
per the FAC09-0001 permit drawings.
According to the City of Auburn's Standards for storm water management,
the City requires storm water quantity and quality control to all proposed
developments, unless exempt. The proposed detention system, control
structure, flow splitter, and ecoStorm I ecoStrom plus treatment train
(D.O.E. GULD approved) have been installed to satisfy these requirements.
The site is also located within the City of Auburn's Groundwater Protection
Zone 4, and several BMP's are listed as required for this designation.
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.
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 paved lot,
installing storm drainage stenciling and provide spill control procedures. In
case of spill call DOE at 1-425-649-7000. The catch basins,control structure/
flow splitter, and ecoStorm I ecoStrom plus treatment train 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. 3—Closed Detention Systems (tanks/gallery)
No. 4—Control Structure/Flaw Restrictor
No. 5—Catch Basins
Royal Environmental Systems, Inc ecoStorm/plus Manual
Storm Water Easement and Maintenance Agreement
Page 8 of 31
• City of Auburn Surface Water Management BMP's (November 2009,
attached at the end of this plan)
No. A306— Landscape Management
No. A409— Parking and Storage for Vehicles/Equipment
No. A708—Roof and Building Drains
No. A713— Maintenance of Stormwater Drainage/Treatment
Facilities
Treatment BMP'S:
The Royal Environmental Systems, Inc ecoStorm /ecoStorm plus treatment
train has been provided to meet D.O.E. requirements for water quality. The
flow splitter will also provide baffling to trap oils and suspended solids. In
addition catch basin & manhole sumps will provide settling basins.
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 care of landscaping and the
removal of trash and debris from the drainage system. The paved areas and
driveways should be kept clean and in repair. Events such as major storms or
heavy winds will require immediate inspections for damages.
To ensure proper water quality and treatment, the detention system and
ecoStrom/ecoStrom plus manholes 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:
Hebert B Street LLC
Go Mr. Henry Hebert
2020 A Street SE
Auburn, WA 98002
(253) 931-8888
Storm Water Easement and Maintenance Agreement
Page 9 of 31
Design Engineer:
POE Engineering, Inc.
do Mr. Alan F. Poe
1314 8fh Street NE #201
Auburn WA 98002
(253) 833-4052
Plan and/or Information Updates:
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.
Stonn Water Easement and Maintenance Agreement
Page 10 of 31
•
INSPECTION/MAINTENANCE CHECKLIST
STRUCTURE s DATEf0 INS E :id MA k C x� �
Results/ -
Maintenance Date
Closed Detention Inspection
System Results
Maintenance
Done
Control Structure/ Inspection
Flow Restrcitor Results ___
Maintenance
Done
Catch Basins Inspection
Results
Maintenance
Done
ecoStorm/ Inspection
ecoStrom plus Results
Maintenance
Done
Maintenance Standards for Drainage Facilities:
The facility-specific maintenance standards contained in this section are
intended to be conditions for determining it 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.
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
Storm Water Easement and Maintenance Agreement
Page 11 of 31
No.3—Closed Detention Systems(tanks/gallery)
Maintenance' Defect ct Conditions When Maintenance hsNeeded Results Expectetl
Werect? 3_.
Storage Area Plugged Air Vents One-halt of the cross section of a vent is Vents open and
blocked at any point or the vent is damaged. functioning.
Debris and Sediment Accumulated sediment depth exceeds 10% All sediment and
of the diameter of the storage area for 1/2 debris removed from
length of storage vault or any point depth storage area.
exceeds 15%of diameter.
(Example:72-inch storage tank would
require leaning when sediment reaches
depth of 7 inches for more than 1/2 length of
tank.)
Joints Between Any openings or voids allowing material to All joint between
Tank/Pipe Section be transported into facility. tank/pipe sections
are sealed.
(Will require engineering analysis to
determine structural stability).
Tank Pipe Bent Out Any part of tank/pipe is bent out of shape Tank/pipe repaired or
of Shape more than 10%of its design shape. replaced to design.
(Review required by engineer to determine
structural stability).
Vault Structure Cracks wider than 1/2-inch and any Vault replaced or
Includes Cracks in evidence of soil particles entering the repaired to design
Wall.Bottom, structure through the cracks,or specifications and is
Damage to Frame maintenance/inspection personnel structurally sound.
andlor Top Slab determines that the vault is not structurally
sound.
Cracks wider than 1/2-inch at the joint of No cracks more than
any inlet/outlet pipe or any evidence of soil 1/4-inch wide at the
particles entering the vault through the joint of the inlet/outlet
walls. pipe.
Manhole Cover Not in Place Cover is missing or only partially in place. Manhole is dosed.
My open manhole requires maintenance.
Locking Mechanism One maintenance person with proper tools Mechanism opens
Not Working cannot open mechanism. Botts into frame with proper tools.
have less than 1/2 inch of thread(may not
apply to self-locking lids).
Cover Difficult to One maintenance person cannot remove lid Cover can be
Remove after applying normal lifting pressure. Intent removed and
is to keep cover from sealing off access to reinstalled by one
maintenance. maintenance person.
Ladder Rungs Unsafe Ladder is unsafe due to missing rungs, Ladder meets design
misalignment,not securely attached to standards. Allows
structure wall.rust,or cracks. maintenance person
safe access.
Catch Basins See°Catch Basins' See'Catch Basins"(No.5). See'Catch Basins'
(No.5) (No.5).
Storm Water Easement and Maintenance Agreement
Page 12 of 31
No.3—Closed Detention Systems(tanks/gallery)
Maintenance�� Defect �a'� Conditions When Maintenance is Needed Results Expected
WiComponent r s,, en Maintenace
liriformetl :" -
Storage Area Plugged Air Vents One-half of the cross section of a vent is Vents open and
blocked at any point or the vent is damaged. functioning.
Debris and Sediment Accumulated sediment depth exceeds 10% An sediment and
of the diameter of the storage area for 1/2 debris removed from
length of storage vault or any point depth storage area.
exceeds 15%of diameter.
(Example:72-inch storage tank would
require cleaning when sediment reaches
depth of 7 inches for more than 112 length of
tank.)
Joints Between Any openings or voids allowing material to All joint between
Tank/Pipe Section be transported into facility. tank/pipe sections
are sealed.
{W8 require engineering analysis to
determine structural stability).
Tank Pipe Bent Out Any part of tank/pipe is bent out of shape Tank'pipe repaired or
of Shape more than 10%of its design shape. replaced to design.
(Review required by engineer to determine
structural stability).
Vault Structure Cracks wider than 12-inch and any Vault replaced or
Includes Cracks in evidence of soil particles entering the repaired to design
Wall,Bottom, structure through the cracks,or specifications and is
Damage to Frame maintenance/inspection personnel structurally sound.
acrd/or Top Slab determines that the vault is not structurally
sound.
Cracks wider than 12-inch at the joint of No cracks more than
any inlet/outlet pipe or any evidence of soil 1/4-inch wide at the
particles entering the vault through the joint of the inlet/outlet
walls. pipe. .
Manhole Cover Not in Place Cover is missing or only partially in place. Manhole is dosed.
Any open manhole requires maintenance.
Locking Mechanism One maintenance person with proper tools Mechanism opens
Not Working cannot open mechanism. Bolts into frame with proper tools.
have less than 1/2 inch of thread(may not
apply to self-locking lids).
Cover Difficult to One maintenance person cannot remove lid Cover can be
Remove after applying normal lifting pressure. Intent removed and
is to keep cover from sealing off access to reinstalled by one
maintenance. maintenance person.
Ladder Rungs Unsafe Ladder is unsafe due to missing rungs, Ladder meets design
misalignment,not securely attached to standards. Allows
structure watt,rust,or cracks. maintenance person
safe access.
Catch Basins See°Catch Basins' See'Catch Basins' (No.5). See'Catch Basins'
(No.5) (No.5).
Storm Water Easement and Maintenance Agreement
Page 13 of 31
No.4—Control Structure/Flow Restrictor
Maihterrancet ,Defect - , Condition When Maintenance is Needed ' Results Expected'
When Maintenance
Atz`ty
Is Perfprliled
General Trash and Debris Material exceeds 25%of sump depth or 1 Control structure
(Includes Sediment) foot below orifice plate orifice is not blocked.
All trash 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 up Structure in correct
to 10%from plumb). position.
Connections to outlet pipe are not watertight Connections to outlet
and show signs of rust. pipe are watertight:
structure repaired or
replaced and works
as designed.
Any holes,other than designed holes,in the Structure has no
structure holes other than
designed holes.
Cleanout Gate Damaged or Missing Cleanout gate is not watertight or is missing. Gate is watertight
and works as
designed.
One maintenance person cannot move up Gate moves up and
and down gate. down easily and is
watertight.
Chainlrod leading to gate is missing or Chain is in place and
damaged. works as designed.
Gate is rusted over 50%of its surface area. Gate is repaired or
replaced to meet
design standards.
Orifice Plate Damaged or Missing Control device is not working properly due Plate is in place and
to missing,out of place,or bent orifice plate. works as designed. •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 bloGdng(or having the Pipe is free of all
potential of blocking)the overflow pipe. obstructions and
works as designed.
Manhole See'Closed See'Closed Detention Systems'(No.3). See'Closed
Detention Systems' Detention Systems'
(No.3). (No.3).
Catch Basin See'Catch Basins See'Catch Basins"(No.5). See'Catch Basins'
(No.5). (No.5).
Storm Water Easement and Maintenance Agreement
Page 14 of 31
No.5—Catch Basins
Maintenance t" - Defect.>� Conditions When Maintenance is:Neededa Results Expected When-`.
Cocrt-r M tMi a r> - Maintenance rs aE' ;
.,. 4 *V""
.... .cerfORf1EU
General Trash& Trash or debris which is located immediately No Trash or debris
Debris in front of the catch basin opening or is located immediately in
blocking intetting 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 free
blocking more than 1/3 of its height. of trash or debris.
Dead animals or vegetation that could No dead animals or
generate odors that could cause complaints vegetation present within
or 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.
Flame 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 the riser rings or lop slab
frame 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 secure at basin wall.
joint 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 No vegetation blocking
more than 10%of the basin opening, opening to basin,
Storm Water Easement and Maintenance Agreement
Page 15 of 31
No.5—Catch Basins
iiatriteZicte4441Defectscli-ajr",4 2Conditrons?Vben'Maintenanceil?NeTededi, i,.-Results,jEip:ecle03.1(h, eiV
rerrailt*5:" Afg.;11-r, ferineWa.,131W1,1:4,4413;141ti giArria-KaWee-ijetaLiS,
'11*it4r.V..;14-i-arkit -%"‘R-4;
11-19-PvInn9,M1,-Ifirilv??N.t3:
Vegetation growing in inlet/outlet 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 Catch basin cover is
Cover Place Any 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, standards and allows
misalignment,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 16 of 31
•
EWWWNFXML SYSiEYSac "a���-+ ecoStorm
ecoStorm® plus maintenance program
The eaiStoema phis is a high-e4e1eney storetwater 5hr don system.
To ensure mndnual efficiency,paioruc maintenance must be performs:
ouch h unit.
Because each projea site is different,each system will exp-mieuce
different rates of sediment,heavy mewl,and nmtiant loadings. For sites
with heavy sediment loading,the Blum should be checked after my store
ate exceeding 1"pa hoar in rainfall intensity,or any rafuhall event in
games of F. For shoe with light sediment loading,the filter shock be
checked after any corm event ex¢-dii'g 2"per hour in rainfall urtamly
or any rain event in excess of i: (:ee a combined total of 6"of rain •
has fallen on any air,regardless of the=dime-at loading,the systems ___
shouldhe checked and maintained - . If the tap of the fitter is not red,Royal E itronmcsal
System.^.recommads claming the filter.Drop along rod trough
To develop an inhiod foal for the loadat at a specific site,the system the 12"standpix an17 fillle.t ety=loans separator,and into the
should he checked no less fnxln_-ntly than at two,faun tight and 12 sunup. Attempt an reach the bottom oft the suuCme sad actin a f el
weeks following the initial installatoa This will pro-ride an initial for the amoursnfseaa'meatthat has wilt-ted Tn2'stump is
gorge for to loading,but events such as snowm:lt may at need th M &shoed to collect and tap Sediment that has not sealed a the
.eonsid ss' Ara minimum Royal Fnvunnm-anal System,gUieltS apsncam drop mvcaire. nit drop structure and the eeoSmms Phis
cleaning t system three dines annually to ensure intended per-for-Matt sunip should be va added lain when approximately 4"of
sediment has callatet Checkthe drop smvcnuc for flossing debris
Inspection_procedure and remove anyaccunnladdn. If neither urscnue requires
Remove t:e antet cas ing sod perform a visual check. The wirer' cleaning,replace the=Tugs and recheck following ten schedule
devotion should be it or sligidy below the invert elevation of the ' deembed above.
clout-steam pipel<A clean Liter is bright S in color
Storm Water Easement and Maintenance Agreement
Page 17 of 3
Page 2 of 2
• -
Cleanout procedure Refill the structure
Remove the rams castg. If free oils are present on the water surface, To perform correctly,the structure must be refilled with clean water
rt to the Fran Oil Rumaval document for appropriate proadu.<s. prior to finishing. The water love:mirz be renamed to the invert
Check upsnean drop scacnxe for trfl»mi Row. If influent flow S elevation of the downstream pipe,thus waning that the Slur is
plug the inlet pipe to the drop scuteme. Using atypical vacuum Iraek, submergA. Refill the structure with clean water,pouring watt
vacuum water,doming debris and all collected sediment from the drop over the filter until the water level is at tic cutlet pipe elevation.
structure fay?orimately 700 gallons). Thoroughly vaetmm any - Using this procedure,the drop manhole is also Fined Total clean
collected fine particles off the top of the fitter,then drop die ere or 5 water required is approximately 1,700 gallons. Be cererl to not
vacuum hose into the 12"standpipe all the way into the sump. Rotate damage the top surface of the filth:or the sealant whh excess water
tbs.-hose within the 12"pips and vacuum all the sediment and water out pressure. Replace the street casting Remove plug from drop
of the stmcauc (approseanaty 1,000 gallons). Using a 75 gpm manhole if instilled
minimum dintharge thin a water tank,Rush down the satire too of the
pier_ Forcing water down from the top will"back-;hush"the filter,but
he careful not to damn the top=face of the filter or the sealant
between blocks with the high-pressure water. A miniature of 1,200 to
1,500 gallons of clean water is required to properly bacic-fmsh the filter.
Note: The saucnue must be installed v aretight,with zero ex-
. f'itration allowed. Fin time the system is checked and ctrvnd,
verity that ware level is at or near the invert oft the outlet pipe
(tome evaporation may occur over long periods of dry weather). At
all Mmes,the water ele;aEon must be above the top of the filter to
Note: Vora that the I2 overflow standpipe is well fast oisrl at aq - maintain a submerged situation If the water level has dropped.,any.
tunes. Using a vacuum and high water flow to clean out t e sump may leak must be fond and repaired to keep the filter anetioning as
have atendency m dtsaru the overflow pipe. If the pipe is not sealed intended
securely to the Sider,bypath of untried water may omur.
Depending oavasman truck capacities,multiple fillings of clean
water tank and decanting of the debris tank is expected'The total
amount of clean water required is approximately 3500 gallon
DO NOT DECf.NT THE COLLECTED DIRTY WATER INTO
TIM STORM SEWER
Proper OSHA safety procedures should be followed at all times
to ensure workers'safety. It Is the responsibility of the
contractor/owner to follow these procedures
protectiTODAY fry
buildingforTOMORR Mv wvwroyalentarpdsc:.net 651-462-2130 • 800417-3240
Storm Water Easement and Maintenance Agreement
Page 18 of 3 l
Royal
ENVIRONMENTAL aws .t� �e = eco5ton
A[his=a flga Eelrpmm Amen-a •• - nS eta nn,,oll.U'J p
ecoStorm® plus filter replacement
The ecoStorm plus is a high-e5cimey stormvater filuni:on Rotate the hose in the pipe and vacumn all the sediment ant
system. To eon e its continued efa ency,the filter must be water out of the sflcmre.
periodically replaced.
The seven block sections must be removed individually. 11
To et tead the life of the filter,reE_r to the ecoStorm plus foam sealant in between each section must be cut the entire
maintenance program fact sheet for routine maintenance 10"thickness of the block and on all sides of the blocks,
information. It is suggested that each unit be checked in including the circumference of the 60"structure..A
accordance with this program to ensure that the system is standard compass handsaw or reciprocating saw with a
performing as intended. Because each project site is different, minimum 12"blade works well to penetrate the cued sealer
each system will experience different rates of sedimer,t heavy and easily cuts through the 10"depth.
metal,and minim-it loadings. Once the filter is no longer
performing as intended,a Royal Environmental Systems certified
ins Ealta should replace the filter as follows:
1. Removing the existing filter
Remove the casting pow&and the outlet TEE. Remove the 17'
PVC standpipe and clean any remaining student from the outside
diameter of the pipe. This pipe will be re-used,so it must not be
cut or damaged using a typical vacuum truck,drop the 4"or 6"
vacuum hose into the 12"standpipe all the way into the sump.
Once the foam is art,attach z chain or other properly rated
OSHA-approved supporting soap to the sinless steel lifting
eyes in the top of a block,and begin extracting it through the
casting. The blocks are designed to pass through the casting
opening. Rotate the blocks vertically as needed from C°to
_.. , 9D°by using a second snap and stainless steel eye threaded
Storm Water Easement and Maintenance Agreement
Page 19 of 31
Page 2
into the insert on the tmderaide of the filter. An OSHA- structur ,remove the liffing eye from the bottom side of the
approved tripod,ajib crane on a maintenance truck,or a block so it can be reused on other blocks. Position the block
small loader or backhoe can help lift the approximately 250- onto the stainless steel supports(see attached drawing ple
pound blocks. The first biodc will be the most difficult to —19112.for properinstailation).
remove due to the adhesion of the old sealant (Note: It is
the owner's responsibility to properly dispose of the used
filter blocks in accordance with local regulations)
3. Repeat step two for all blocks
There should be an approximately ye"gap between all block
edges,including the cadre circumftzence of the structure if
all blocks are correctly spaced on the supports. Adjust the
blocks as needed to obtain this''A"gap to ensure the proper
2. Re-installing the filter media blocks scaling between all blot(see steps fourand five).
Once the existing blocks are removed,clean the old sealant
from the interior wall of the=care and the stainless stet Note: DO NOT remove the stainless sr l eyebolts from the
support brackets. Gently lower a new block through the top of individual filter blocks. Each block must have an
casting opening,t"i�"g care not to damage the filter section. eyebolt threaded into the stainers steel insert encapsued
Rotate the block as needed from 0°to 90°,using two straps inside the aggregafe. This will prevent the insert from filling
and stainless steal Ling eyes. Once the block is inside the
with pollutants and will allow for lifting the blocks out of the
structure during funre filter replacement.
Storm Water Easement and Maintenance Agreement
Page 20 of 31
•
Page 3 of 5
5. Final sealing of the gaps
Using approximately See-six cans of foam,c ontinue to Ll:
the rest of the'/"gaps in two or three separate lies,allowing
the foam to expand to the top of the alter blocks. Be careful
to ensure minimal excess foam above the gaps when cured.
4. Initial sealing of the gaps
Twelve cans of ffilti Insulating FillerFoam CF 116-14 have
been provided to seal the W'gaps. However,experience has
shown that approximately 10 coma will complain the job.
While standing on top of the filter,insert the 8"nozzle
extension on each can as far down into the'A"gaps as
possibleandstarr t ruing the gapsarouatd the bottom of the 6. Install the 12" cleanout pipe
Biter. Continue around the entire circumference and in
between all blocks. Spray Insert the previously removed 12"PVC standpipe in the
ray only enough foam to create an
initial seal on the bottom that is 2"to 3"of the 10"deep center block and seal around the pipe with the FEN leant
filter,being careful not to overfill initially,as the foam may Ensure the pipe is perfectly vertical during the curing
swell to several times its original size.and cover the process, If the pipe is not sealed securely to the filter,the
underside of dv filter. This will seal the bosom gaps of the ps bypass of untreated water may occur.
to avoid wasting the sealauL Approximately three cans
•
should consulate this initial seal.
•
Storm Water Easement and Maintenance Agreement
Page 21 of 31
Page 4 of 5
7. Refill the structure Note: The structure must be initially installed to be
watertight with zero ex-filtration mowed. Each time the
The savcnre must be refilled with clean water prier-to
finishing the installation. The wafer level must be returned system is checked and cleaned;verify that the water level is
to the invert elevation of the downsteam nice,thus ensurer'
nsuring at or near the invert of the outlet pipe(some evaporation may
that the filter is submc-ral, The sxlant should be allowed tc
occur over long periods of dry weather). At all times,the
cure for a minimum of one hour prior to refilling the water elevation must be above the top of the filter to
structure, While filling the sttucmre from Sttet level with a maintain a submerged situation. If the water level has
Water hose,be careful not to damage the top surface of the d'upped,any leak Tour be sound and repaired to keep the
filter or sealant with excess water pressure. If the sealant nlfilter functioning as intend .
es
separates from the filtm,it hasn't had sufficient time to cure.
Verify that the 12"overflow standpipe is well$.stencd at2°r Proper ORE L&safety procedures should be followed at all
times to ensure worker safety. It is the responsibility of
filling it with water. If the pipe is loose,bypass of untreated
water may omur. Replace the PVC on the outlet pipe and
the contractor/owner to follow these procedures.
the casting cover.
Storm Water Easement and Maintenance Agreement
Page 22 of 3 l
•
ecoStormi;plus standard details Pages of
Fill X'Netts between Jr ^PVO
blocks and around / Oven-low Pipe
Sreomfvsre wilnduenisl ,
Foam Scalaot Provided T
T[�/ Fl!Gapwim.
4 Inl.Craw Poem
Sealant provides .,•
Filter Media - I i -
e
• l I of
Channel C37.5 304 Smir] 'A,.r%
24"Icngmllcdto It30"& i
Bolted to rot olemtl. y5"Oz4Y"SS Wedi_Author Bob ..±„ .
.. ,' T91" (Ices
X-I "� --.-\:/t-
2 2t" R-[6't
ndahalm See Note ^1.';',..:::::-'1<1.4...•
Support l '�.
Support Pnstallauon Notes ' 'q' =•
1. IBnm /
Support E5' lJ IJ � �
muubeimugd22S `' ' �- ..
cmtab centerand psrrnlld /=`` .. •. e '
to each other. r •
i Xdamn(masural at _ II' n • ' 1 BI34 ;
midpoint of Beam should be - _ •
enctiv tit same onbot e. t3. -..... ....:,1 i{7I
si lc*tbo 18,75'shown. 011" : --' .
mom..pl.tus.rcra.zes.a
a a
Loyal!
wwcc.royaleat prisesnet ,
RESITDDAY A.°
buildin g'^70MORROW c'? ` % ..•
? ,'• 060"OMantou
X 60"0 - Filter Media Block Installation Fiat,4 Eplus-FM2
ecoStornz "plus"-Standard Details
Rev.Date:
P.O.Box 430•30622 Forest Blvd•Stacy,MN 55079•Ph:651.4622130 J 1-11-10 SEG
Storm Water Easement and Maintenance Agreement
Page 23 of 31
SURFACE WATER MANAGEMENT MANUAL
NOVEMBER 2009
4.4.6 BMP A306: Landscaping and LawnNegetation Management
4.4.6.1 Description of Pollutant Sources
. Landscaping can include grading, soil transfer,vegetation removal,pesticide and fertilizer application,
and watering. Stornwater contaminants include toxic organic compounds, heavy metals,oils,total
suspended solids, colcom bacteria,fertilizers,and pesticides.
Lawn and vegetation management can indude control of objectionable weeds,insects.mold,
bacteria,and other pests with chemical pestckes and is conducted commercially at commercial,
industrial,and residential sites. Examples include weed control on golf course lawns, access roads,
and utility corridors and during landscaping;sap stain and insect control on lumberand logs; rooftop
moss removal;killing nuisance rodents;fungicide application to patio decks;and residential
lawn/plant care.Toxic pesticides such as penia_chlorbpfi'enol, caibamates,and drganorietallics can
be released to the environment by leaching and dripping from treated parts,container leaks, product
misuse, and-outside storage of pesticide contaminated materials and equipment. Poor management
of the vegetation,poor application of pesticides or fertilizers, and non-targeted irrigation water or over
watering can cause appreciable stormwater contamination.
4,4.6.2 Pollutant Control Approach
Control of fertilizer and pesticide applications,soil erosion,and site debris to prevent contamination of
stormwater. -
Develop and implement an integrated Pest Management Plan(IPM)and use pesticides only as a
last resort Refer to Volume IV,Appendix C—Example of an Integrated Pest Management Program
for more-information. If pesticides/herbicides are used they must be_carefully applied,inaccordance
with label instructions on U.S. Environmental Protection Agency(EPA)registered materials.Maintain
appropriate vegetation,with proper fertilizer application Where practicable,to control erosion and the
discharge of stormwater pollutants.Where practicable,grow plant species appropriate for the site, or
adjust the soil properties of the subject site to°row desired plant species.
4.4.6.3 Required BMPS for Landscaping
•
• Install engineered soil/landscape systems to improve the infiltration and regulation of
stormwater in-landscaped areas.
• Do not dispose of collected vegetation into wetlands, waterways or storm drainage
systems:
4_4.6.4 Recommended BMPs for Landscaping
•
• Conduct mulch-mowing whenever practicable.
• Dispose of grass clippings, leaves, sticks, or other collected vegetation by
composting, if feasible.
• Collect all clippings, leaves, bark, and trimmings blown onto the sidewalk or street.
Do not leave this material in the gutter or where it can be washed into the storm
drainage system.
Storm Water Easement and Maintenance Agreement
Page 24 of 31
•
SURFACE WATER MANAGEMENT MANUAL
N O V E M B E R 2 0 0 9
• Use mulch or other erosion control measures when soils are exposed for more than
one week during the dry season or two days during the rainy season.
• If oil or other chemicals are handled, store and maintain appropriate oil and chemical
spill cleanup materials in readily accessible locations. Ensure that employees are
familiar with proper spill cleanup procedures.
• T ill fertilizers into the soil rather than dumping or broadcasting onto the surface.
Determine the proper fertilizer application for the types of soil and vegetation
encountered.
• Till a topsoil mix or composted organic material into the soil to create a well-mixed
transition layer that encourages deeper root systems and drought-resistant plants.
• Use manual and/or mechanical methods of vegetation removal rather than applying
herbicides, where practical.
• Target irrigation water on vegetated areas and limit irrigation time to reduce the
potential of carrying fertilizers and pesticides off-site.
4.4.6.5 Required BMPs for the Use of Pesticides
• Develop and implement an integrated pest management system (IPM) (See section
on IPM at end of BMP)and use pesticides only as a last resort.
• Implement a pesticide-use plan and include at a minimum: a list of selected
. pesticides and their specific uses; brands,formulations, application methods, and
quantities to be used; equipment use and maintenance procedures; safety, storage,
and disposal methods; and monitoring, record keeping, and public notice
procedures.All procedures shall conform to the requirements of Chapter 17.21 RCW
and Chapter 16-228 WAC(Appendix 4— D.R7).
• Choose the least toxic pesticide available that is capable of reducing the infestation
to acceptable levels.The pesticide should readily degrade in the environment and/or
have properties that strongly bind it to the soil.Any pest control used should be
conducted at the life stage when the pest is most vulnerable. Any method used
should be site-specific and not used wholesale over a wide area.
• Apply the pesticide according to label directions. Under no conditions shall pesticides
be applied in quantities that exceed manufacturer's instructions.
• Mix the pesticides and clean the application equipment in an area where accidental
spills will not enter surface or groundwaters, and wiil not contaminate the soil.
• Store pesticides in enclosed areas or in covered impervious containment. Ensure
that pesticide contaminated stormwater or spills/leaks of pesticides are not
discharged to storm drains. Do not hose down paved areas to a storm drain or
conveyance ditch. Store and maintain appropriate spill cleanup materials in a
location known to all near the storage area.
• Clean up any spilled pesticides and ensure that the pesticide contaminated v,'aste
materials are.kept in designated covered and contained areas.
Storm Water Easement and Maintenance Agreement
Page 25 of 31
SURFACE WATER MANAGEMENT MANUAL
NOVEMBER 2009
• The pesticide application equipment must be capable of immediate shutoff in the
event of an emergency.
• Do not spray pesticides within 100 feet of open waters including wetlands; ponds;
and streams, sloughs, and any drainage ditch or channel that leads to open water,
except when approved by Ecology or by the City of Auburn.All sensitive areas
including wells, creeks, and wetlands must be flagged prior to spraying.
• As required by the City of Auburn or by Ecology, complete public posting of the area
to be sprayed prior to the application. •
• Spray applications should only be conducted during weather conditions as specified
in the label direction and applicable focal and state regulations. Do not apply during
rain or immediately before expected rain.
4.4.6.6 Recommended BMPs for the use of Pesticides
• Consider alternatives to the use of pesticides such as covering or harvesting weeds,
substitute vegetative growth, and manual weed control/moss removal:
• Consider the use of soil amendments, such as compost,that are known to control
some common diseases in plants, such as Pythium root rot, ashy stem blight, and
parasitic nematodes.The following are three possible mechanisms for disease
control by compost addition (USEPA Publication 530-F-9-014):
e Successful competition for nutrients by antibiotic production;
o Successful predation against pathogens by beneficial microorganism; and
o Activation of disease-resistant genes in plants by composts.
Installing an amended soiUlandscaoe system can preserve both the plant system and the soil
system more effectively,This type of approach provides a soil/landscape system with
adequate depth, permeability, and organic matter to sustain itself and continue working as an
effective stomnvater infiltration system and a sustainable nutrient cycle.
• Once a pesticide is applied, its effectiveness should be evaluated for possible
improvement. Records,should be kept showing the applicability and inapplicability of
the pesticides considered.
• An annual evaluation procedure should be developed including a review of the
effectiveness of pesticide applications, impact on buffers and sensitive areas
(including potable wells), public concerns, and recent toxicological information on
pesticides used/proposed for use. If individual or public potable wells are located in
the proximity of commercial pesticide applications, contact the regional Ecology
hydrologist to determine if additional pesticide application control measures are
necessary.
• Rinsate from equipment cleaning and/or triple-rinsing of pesticide containers should
be used as product or recycled into product.
For more information,contact the WSU Extension Home-Assist Program at 253-445-4556; Bio-
Integral Resource Center(BIRC), P.O. Box 7414, Berkeley, CA 94707;or the Washington
Department of Ecology to obtain`Hazardous Waste Pesticides"(Publication#89-41);contact EPA to
Storm Water Easement and Maintenance Agreement
Page 26 of 31
•
S U R F A C E W A T E R M A N A G E M E N T M A N U A L
NOVEMBER 2009
obtain a publication entitled"Suspended,Canceled and Restricted Pesticides*which lists all
restricted pesticides and the specific uses that are allowed.Valuable information from these sources
may also be available on the in tercet.
4.4.6.7 Required BMPs for Vegetation Management
• Use at least an eight-inch topsoil layer With at least 8 percent organic matter to
provide a sufficient vegetation—growing medium.
• Select the appropriate.turf grass mixture for climate and soil type based on
recommendations from a licensed landscape architect
• Selection of desired plant species can be made by adjusting the soil properties of the
subject site. For example, a constructed wetland can be designed to resist the
invasion of reed canary grass by layering specific strata of organic matters (e.g.,
compost forest product residuals)and creating a mildly acidic pH and carbon-rich soil
medium. Consult a soil restoration specialist for site-specific conditions.
• Aerate lawns regulariy in areas of heavy use, where the soil tends to become
compacted.Aeration shall be conducted while the grasses in the lawn are growing
most vigorously. Remove layers of thatch greater than%-inch deep.
• Set the mowing height at the highest acceptable level and mow at times and
intervals designed to minimize stression the turf. Generally mowing only 113 of the
grass blade height will prevent stressing the turf.
4.4.6.8 Fertilizer Management:
• Fertilization needs vary by site depending on plant, soil, and climatic conditions.
Evaluation of soil nutrient levels through regular testing ensures the best possible
efficiency and economy of fertilization. For details on soils testing, contact the Pierce
Conservation District or Cooperative Extension Service.
• Fertilizers shall be applied in amounts appropriate for the target vegetation and at the
time of year that minimizes losses to surface and groundwaters. Do not fertilize
during a drought or when the soil is dry.Alternatively, do not apply fertilizers within
three days prior to predicted rainfall.The longer the period between fertilizer
application and either rainfall or irrigation, the less fertilizer runoff occurs.
• Use slow release fertilizers such as methylene urea,-IDBtJ;or resin coated fertilizers
when appropriate,generally in the spring. Use of slow release fertilizers is especially
important in areas with sandy or gravelly soils.
• Time the fertilizer application to periods of maximum plant uptake. Generally fail and
spring applications are recommended.
• Properly trained persons shall apply all fertilizers. Fertilizers shall not be applied to
grass swales,filter strips, or buffer areas that drain to surface water bodies.
Storm Water Easement and Maintenance Agreement
Page 27 of 31
SURFACE WATER MANAGEMENT MANUAL
NOVEMBER 2009
4.4.6.9 Integrated Pest Management
•
An IPM program might consist of the following steps:
1. Correctly identify problem pests and understand their life cycle.
2. Establish tolerance thresholds far pests.
3. Monitor to detect and prevent pest problems.
4. Modify the maintenance program to promote healthy plants and discourage pests.
5. Use cultural,physical, mechanical, or biological controls first if pests exceed the
tolerance thresholds.
6. Evaluate and record the effectiveness of the control and modify maintenance practices
to support lawn or landscape recovery and prevent recurrence.
For an elaboration of these steps refer to Volume IV,Appendix C—Example of an Integrated Pest
Management Pmgram.
Storm Water Easement and Maintenance Agreement
Page 28 of 31
•
SURFACE WATER MANAGEMENT MANUAL
NOVEMBER 2009
4.8.8 BMP A708: Roof and Building Drains at Manufacturing and Commercial
Buildings
4.8.8.1 Description of Pollutant Sources
Stormwater runoff from roofs and sides of manufacturing and commercial buildings can be sources of
pollutants caused by leaching of roofing materials, building vents, and other air emission sources.
Vapors and entrained liquid and solid droplets/particles have beeh identified as potential pollutants in
roof/buiiding runoff. Metals, solvents, acidic/alkaline pH, BOD, and organics are some of the pollutant
constituents identified.
4.8.8.2 Pollutant Control Approach
Evaluate the potential sources of stormwater pollutants and apply source control BMPs where
feasible.Use dust filtration/collection systems such as bag house filters,cyclone separators, etc. to
control vented dust emissions that could contaminate stormwater. It may be necessary to monitor
roof tops for possible accumulations of materials and take appropriate measures to prevent this
material from entering the storm drainage system.Control of dusts at foundries,metal shredders, and
material transfer and handling facilities are some examples.
4.8.8.3 Required BMPs
• Bare galvanized metal shall not be used for materials that convey stormwater, such
as roofs, canopies, siding, gutters,downspouts, roof drains, and pipes. Any
galvanized materials shall have an inert; non-leachable-inish, such as baked
enamel,fluorocarbon paint (such as Kynar® or Hylar®), factory-applied epoxy, pure
aluminum, or asphalt coating.Acrylic paint, polyester paint, field-applied, and part
zinc (such as Galvalume®)coatings are not acceptable. •
• If leachates and/or emissions from buildings are suspected sources of stormwater
pollutants, then sample and analyze the stormwater draining from the building. •
' • If a roof/building stormwater pollutant source is identified, implement appropriate
source control measures such as air pollution control equipment, selection of
materials, operational changes, material recycle, process changes, etc.
• Water quality treatment BMPs are found in Volume V of this manual.
Storm Water Easement and Maintenance Agreement
Page 29 of 31
•
SURFACE WATER MANAGEMENT MANUAL
N O V E M B E R 2 0 0 9
4.8.13 BMP A713: Maintenance of Storwater Drainage age and
Treatment Facilities
- 4.8.13.1 Description of Pollutant Sources
Facilities include roadside catch basins on arterials and within residential areas,conveyance
systems,detention facilities such as ponds and vaults, oil and water separators, biofilters, settling
basins,infiltration systems,and allottiertypes of storrnwater teatment systems presented in
Volume V. Roadside catch basins can remove from 5 to 15 percent of the pollutants present in
stormwater.When catch basins are about 60 percent full of sedimerit,they cease remdvirig
sediments. Oil and grease,hydrocarbons,debris,heavy metals,sediments,and contaminated water
are found in catch basins,oil and water separators,setiling basins,at
4.8.13.2 Pollutant Control Approach
Provide maintenance and cleaning of debris,sediments, and oil from stormwater collection,
conveyance, and treatment systems to obtain proper operation.
4.8.13.3 Required BMPs
Maintain stormwater treatment facilities according to the O&M procedures presented in
Volume I,Appendix D, in addition to the following BMPs:
• Inspect and clean treatment BMPs, conveyance systems, and catch basins as
needed, and determine whether improvernents in O&M are needed.
• Promptly repair any deterioration threatening the structural integrity of the facilities.
These include replacement of clean-out gates, catch basin lids, and rock in
emergency spillways.
• Ensure that storm sewer capacities are not exceeded and that heavy sediment
discharges to the sewer system are prevented.
• Regularly remove debris and solids from BMPs used for peak-rate control, treatment,
etc. and discharge to a sanitary sewer if approved by the City of Auburn,or truck to a
local or state government approved disposal site.
• Clean catch basins in accordance with The information provided in Volume I,
Appendix D.Additional information is also included in BMP S109: Cleaning Catch
Basins-
• Clean debris in a catch basin as frequently as needed to ensure proper operation of
the catch basin.
• Post warning signs or curb markers;"Dump No Waste-Drains to Groundwater,"
"Streams,*"Lakes,"or emboss on or adjacent to all storm drain inlets where
practical:
• Disposal of sediments and liquids from the catch basins must comply with
°Recommendations for Management of Street Wastes"described in Appendix 0 of
this volume.
Storm Water Easement and Maintenance Agreement
Page 30 of 31
S U R F A C E•
W A T E R M A N A G E M E N T M A N U A L •
NOVEMBER 2009
Select additional applicable BMPs from Chapter 4 of this volume depending on the
pollutant sources and activities coneucted at the facility.Those BMPs indude:
o A407 Storage of Liquid, Food Waste, or Dangerous Waste Containers.
o A603 Soil Erosion and Sediment Control at Industrial Sites
a A709 Urban Str>ets
•
o A714 Spills of Oil and Hazardous Substances
o 5101 Eliminate Illicit Storm Drainage System Connections
Storm Water Easement and Maintenance Agreement
Page 31 of 31