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Home My WebLink AboutRC20221114000186 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-1 of 28 Record Date:ll/14/2022 8:01 AM Electronically Recorded King County,WA Return Address: City Clerk's Office City of Renton 1055 S Grady Way Renton,WA 98057 DECLARATION OF COVENANT FOR INSPECTION AND MAINTENANCE OF DRAINAGE FACILITIES AND ON-SITE BMPS Grantor: City of Renton, a Washington municipal corporation Grantee: Citv of Renton, a Washin�ton municipal corporation Legal Description: HILLMANS LK WN GARDEN OF EDEN# 1 LOT"1" OF RENTON SP #LUA20-000142 REC#20220721900052 SD SP BEING PORTION OF LOT 38 OF SD ADD Assessor's Tax Parcel ID#: 334210-3245 IN CONSIDERATION of the approved City of Renton (check one of thefollowing) ❑ Residential Building Permit �✓ Commercial Building Permit ❑Clearing and Grading Permit Q Civil Construction or Utility Permit for Permit(s)C17005383/B17005413 (construct�on/au��d�nq/ut��tyPerm�t#)relating to the real property ("Property") described above, the Grantor(s), the owner(s) in fee of that Property, hereby covenants (covenant)with the City of Renton ("City of Renton" or"City'), a municipal corporation of the state of Washington,that he/she(they)will observe, consent to,and abide by the conditions and obligations set forth and described in Paragraphs 1 through 9 below with regard to the Property, and hereby grants (grant) an easement as described in Paragraphs 2 and 3. Grantor(s) hereby grants (grant), covenants (covenant), and agrees (agree) as follows: 1. The Grantor(s)or his/her(their)successors in interest and assigns("Owners")shall at their own cost, operate, maintain, and keep in good repair, the Property's drainage facilities constructed as required in the approved construction plans and specifications R-3987 (Project P�an#) on file with the City of Renton and submitted to the City of Renton for the review and approval of permit(5) C17005383/B17005413 _(Construction/euilding/UtilityPermit#).The Property's drainage facilities are shown and/or listed on Exhibit A—Site Plan. The Property's drainage facilities shall be maintained in compliance with the operation and maintenance schedule included and attached herein as Exhibit B—Operations and Maintenance. Drainage facilities include pipes, channels, flow control facilities, water quality facilities, on-site best management practices (BMPs) and other engineered structures designed to manage and/or Page 1 of 28 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-2 of 28 Record Date:ll/14/2022 8:01 AM King County,WA treat stormwater on the Property. On-site BMPs include dispersion and infiltration devices, bioretention, permeable pavements, rainwater harvesting systems, tree retention credit, reduced impervious surface footprint, vegetated roofs and other measures designed to mimic pre-developed hydrology and minimize stormwater runoff on the Property. 2. City of Renton shall have the right to ingress and egress over those portions of the Property necessary to perform inspections of the stormwater facilities and BMPs and conduct maintenance activities specified in this Declaration of Covenant and in accordance with the Renton Municipal Code. City of Renton shall provide at least thirty (30) days' written notice to the Owners that entry on the Property is planned for the inspection of drainage facilities. After the thirty(30) days, the Owners shall allow the City of Renton to enter for the sole purpose of inspecting drainage facilities. In lieu of inspection by the City, the Owners may elect to engage a licensed civil engineer registered in the state of Washington who has expertise in drainage to inspect the drainage facilities and provide a written report describing their condition. If the engineer option is chosen,the Owners shall provide written notice to the City of Renton within fifteen (15)days of receiving the City's notice of inspection.Within thirty(30)days of giving this notice,the Owners, or engineer on behalf of the Owners, shall provide the engineer's report to the City of Renton. If the report is not provided in a timely manner as specified above, the City of Renton may inspect the drainage facilities without further notice. 3. If City of Renton determines from its inspection, or from an engineer's report provided in accordance with Paragraph 2, that maintenance, repair, restoration, and/or mitigation work is required to be done to any of the drainage facilities, City of Renton shall notify the Owners of the specific maintenance, repair, restoration, and/or mitigation work ("Work") required pursuant to the Renton Municipal Code. The City shall also set a reasonable deadline for the Owners to complete the Work, or to provide an engineer's report that verifies completion of the Work. After the deadline has passed, the Owners shall allow the City access to re-inspect the drainage facilities unless an engineer's report has been provided verifying completion of the Work. If the Work is not completed within the time frame set by the City, the City may initiate an enforcement action and/or perform the Work and hereby is given access to the Property for such purposes. Written notice will be sent to the Owners stating the City's intention to perform such Work.This Work will not commence until at least seven(7)days after such notice is mailed. If, within the sole discretion of the City, there exists an imminent or present danger, the seven (7) day notice period will be waived and Work will begin immediately. 4. The Owners shall assume all responsibility for the cost of any Work, or any measures taken by the City to address conditions as described in Paragraph 3. Such responsibility shall include reimbursement to the City within thirty(30)days of the receipt of the invoice for any such Work performed. Overdue payments will require payment of interest at the maximum legal rate allowed by RCW 19.52.020 (currently twelve percent (12%)). If the City initiates legal action to enforce this agreement, the prevailing party in such action is entitled to recover reasonable litigation costs and attorney's fees. 5. The Owners are required to obtain written approval from City of Renton prior to filling, piping, cutting, or removing vegetation (except in routine landscape maintenance) in open vegetated stormwater facilities (such as swales, channels, ditches, ponds, etc.), or performing any alterations or modifications to the drainage facilities referenced in this Declaration of Covenant. Page Z of 28 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-3 of 28 Record Date:ll/14/2022 8:01 AM King County,WA ,, ,} ;, �'<' ';;' '�: 6. �r�y�r�c�trc�rsr��s�ser�t r�quar�d��a b��a��r� �r cath�r�is� prc�vid�d fic�r by��h� pr��isic�r�s�f thi� €� ��r��r��r�t sh�ll b��e�f��ti+��cap��r p�r��!d�li�r�r�r�rthr��3�d�ys�ft�r rra�ilira�by��rtifii�d ��i&, r�t�rr� r�c�ap�r�c��st�d. ';3 7. 1�Oith r��rd tc�th�r�a�t�rs�dd��ss�d h�r�i�o,�h�s��r��rr'en��csr�stAt��s ih��r��rr��r��r��r�t b��na��r� th� p��ti�s, �rad s�op�rs�d�s �II p�izsr dis��r�si�r�s, rr��i�ti�r�se arad �11 ��r��rr,�r�t� s wh��sr��r�rh�th�r c�r�l crr�rrtt�r�. �`' $. 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EIVGIIVEERE� S�LUTI�IVS �►I T'E A �E Cc�tch�casi�a �t�r�rFelt�r'"' ImporFant:These guidelines should be used as a parP of your site storrriwat�r plar�. �verview The CqtchBosin 5tormFilter'"' (CBSF)consists af a multi-chamber Once in the cartridge chamber,polluted water pands and ste�l,concret�,or plastic catch basir�urit that car cortair�up to percolates horizontally through the medic�in the filter cartridges. four SiormFilter cartridges.The steel C6SF is oifered both as a Trepted water colleds in the cartridge's center tube from where it �tandczrd and as a deep unit. is directed by an under-drain manifold to the outle4 pipe on the downstream side of the overflow weir and discharged. 7h�CBSF is insfalled flush wifh the finished grade and is applieable for both cons4rained lat and retrofit appliccafions. It When flows into fhe CBSF exceed the wa4er yuality design ccan also be fitfed with an inlet pipe for roof leaders or similar value,excess wafer spills over the overflow weir,bypassing the appliccations. carfridge bay,and discharges 90 the outle4 pipe. 7he CBSF unit treats peak water qualiiy design flows up to 0.13 Applieations cfs,coupled with an internal weir overflow capacity of 1_0 cfs for The CBSF is parficularly useful where small flows are being the standard unit,and 1.8 cfs for the deep steel and concrete treated or for sifes that are flat and have little availabl�hydraulic units. Plastie uni4s have pn internpl weir overFlaw cppacity of 0.5 head to spare.The unit is ideal for applications in which c$s. standard catch basins are to be used. Both wo4er quality and cptchment issues can be resobed with the use of the CBSF. &�esign�p�ereatic�n The CBSF is insfalled as the primary reeeiver of runafF,similar Retra-F�t fo a standard,grat�d catch basin.7he steel and concrete CBSF The retrofit market has many possible applications for the CBSF. units hove an H-20 rated,frafFic bearing lid that allows the filter 7he C65F can b�installed by replacing an existing catch basin ta be insfalled in parking lots,and for all praciical purposes, without having to"chase the grade,"ihus reduciny the high cost Ycakes up no land area.Plostic units can be used in landscaped of re piping the siorm system. areas and for other non-traffic-bearing applieations. The CBSF consis4s of a sumped inlet chamber and a cartridge chamber(s).RunofF en9ers the sumped inlet chamber either by sheet flow from a paved surface or from an inlef pipe discharging directly to fhe unit vault.The inlet chamber is equipped wi4h an internal bafFle,which traps debris and floating oil and grease,and an overflow weir.While in the inlet chamber, h�crvier solids are allowed to settle into the deep sump,while lighter solids and soluble pollutants are direded under Yhe bafFle and infa the cartridge chamber through a port between the baffle and the overflow weir. Page 1 �;^+yi � �� ' ��`�` www.ContechES.com/stormwater �m��w�r�r�.,d�ru��s am�x�rc�o�re4a�a��m 800-33�-1122 - �2U13 Contech Engineered SoluTions Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-6 of 28 Record Date:ll/14/2022 8:01 AM King County,WA APPENDIX A MAINTENANCE REQUIREMENT�FOR�TORMWATER FACILITIES AND ON-�ITE BMP� ; ,; �V+�,+2-��t�It.T��k'fi'f�N F�GI�.,�'T'IE'3 MAINTENANCE DEFECT OR CONDITIONS WHEN RESULTS EXPECTED WHEN COMPONENT PROBLEM MAINTENANCE IS NEEGEG MAINTENANCE IS PERFORMEu Site Trash and debris Any trash and debris which exceed 1 cubic Trash and debris cleared from site. foot per 1,000 square feet(this is about eGual to the amo��nt of tra�h it woul�take to fill up one standard aize office garbage can).In general,there should be no visual evidence of dumping. Noxious weeds Any noxious or nuisance vegetation which No�cious and nuisance vegetation removed msy corstitute s hazsrd to City personriel accordirg to applieable regulatiors.No or the public. danger of noxious vegetation where City personnel or the public might normally be. Contaminants and Any evidence of contaminants or pollution Materials removed and disposed of pollution such as oil,gasoline,concrete slu�ies or according to applicable regulations. paint. Source control BMPs implemented if 2ppropri2te.No cont2min2nts pre�ent other than a surface oil film. Excessive gro�n?h of Grass or gro�ndcover exceeds 18 inches Grass or gro��ndcover mowed to a height grass/groundcover in height. no greater than 6 inches. Infittration Pond,Top Rodent holes Any evidence of rodent holes if facility is Rodents removed or destroyed and dam or Side Slopes of acting as a dam or berm,or any evidence or berm repaired. Dam,Berm or of water piping through dam or berm via Embankment rodent holes. Tree growth Tree growth threatens integrity of dams, Trees do not hinder facility performance or berms or slopes,does not allow maintenance activities. maintenance access,or interferes with maintenance activity.If trees are not a threat to dam,berm,or embankment integrity or not interfering with access or maintenance,they do not need to be removed. Erosion Eroded damage over 2 inches deep where Slopes stabilized using appropriate cause of damaye is still present or where erosivn contrvl measures.If erosion is there is potential for continued erosion. occurring on compacted slope,a licensed Any erosion observed on a compacted civil engineer should be consulted to slope. resolve source of erosion. Settlement Any part of a dam,berm or embankment Top or side slope restored to design that has settled 4 inches lower than the dimensions.If settlement is significant,a design elevation. licensed civil engineer should be consulted to determine the cause of the settlement. Infittration Pond, Sediment If two inches or more sediment is present Facility infiltrates as designed. Tank,Vault,Trench, accumulation or a percolation test indicates facility is or Small Basin working at or less than 90%of design. Storage Area Liner damaged Liner is visible or pond does not hold water Liner repaired or replaced. (If applicable) as designed. Infiltration Tank Plugged air vent Any blockage of the vent. Tank or vault freely vents. Structure Tank bent out of Any part of tank/pipe is bent out of shape Tank repaired or replaced to design. shape more than 10%of its design shape. Gaps between A gap wider than%-Inch at the Jolnt of any No water or soll entering tank through sections,damaged tank sections or any evidence of soil joints or walls. joints or cracks or particles entering the tank at a joint or tears in wall through a wall. Infittration Vault Damage to wall, Cracks wider than%z-inch,any evidence of Vault is sealed and structurally sound. Structure frame,bottom,and/or soil entering the structure through cracks top slab or qualified inspection personnel determines that the vault is not structurally sound. 12/12/2016 2017 City of Renton Surface Water Design Manual A-4 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-7 of 28 Record Date:ll/14/2022 8:01 AM King County,WA APPENDIX A MAINTENANC'E REQi7IREMENT�FOR�TORMWATER FACILITTE�AND ON-SITE BMP� I.��,,,�,"'��Il.`�"F�4TIflN��11�1�� MAINTENANCE DEFECT OR CONDITIONS WHEN RESULTS EXPECTED WHEN COMPONENT PROBLEM MAINTENANCE IS NEEGEG MAINTENANCE IS PERFORMEu InIeUOutlet Pipes Sediment Sediment filling 20%or more of the pipe. InleUoutlet pipes clear of sediment. accumulation Trash and debris Trash and debris acc.umulated in No trash or debris in pipes. irletloutlet pipes(i�icludes floatables arid non-floatables). Damaged inleUoutlet Cracks wider than%z-inch at the joint of the No cracks more than'/,-inch wide at the pipe inlet/outlet pipes or any evidence of soil joint of the inleUoutlet pipe. e��terirg at the joiiits of the inlet/outlet pipes. Access Manhole Covedlid not in place Covedlid is missing or only partially in Manhole access covered. place.Any open manhole requires immediate maintenance. Locking mechanism Mechanism cannot be opened by one Mechanism opens with proper tools. not working maintenance person with proper tools. Bolts cannot be seated.Self-locking cover/lid does not work. Covedlid difficult to One maintenance person cannot remove Covedlid can be removed and reinstalled remove covedlid after applying 80 Ibs of lift. by one malntenance person. Ladder rungs unsafe Missing rungs,misalignment,rust,or Ladder meets design standards.Allows cracks. maintenance person safe access. Large access Damaged or difficult Large access doors or plates cannot be Replace or repair access door so it can doors/plate to open opened/removed using normal equipment. opened as designed. Gaps,doesn't cover Large access doors not flat and/or access Doors close flat;covers access opening completely opening not completely covered. completely. Lifting rings missing, Lifting rings not capable of lifting weight of Lifting rings sufficient to lift or remove rusted door or plate. door or plate. InfiRration Pond, Plugged fiRer bag(if Filter bag more than'/z full. Replace filter bag or redesign system. Tank,Vault,Trench, applicable) or Small Basin Filter Bags Infiltration Pond, Sediment 6"or more of sediment has accumulated. Pre-settling occurs as designed Tank,Vault,Trench, accumulation or Small Basin Pre- settling Ponds and Vaults Infittration Pond, Plugged rock filter High water level on upstream side of filter Rock filter replaced evaluate need for filter Rock Filter remains for e�dended period of time or little and remove if not necessary. or no water flows through fiRer during heavy rain storms. Infittration Pond Rock missing Only one layer of rock e�tists above native Spillway restored to design standards. Emergency soil in area five square feet or larger,or Overflow Spillway any exposure of native soil at the top of out flow path of spillway.Rip-rap on inside slopes need not be replaced. Tree growth Tree growth impedes flow or threatens Trees removed. stability of spillway. 2017 City of Renton Surface Water Design Manual 12/12/2016 A-5 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-8 of 28 Record Date:ll/14/2022 8:01 AM King County,WA APPENDIX A MAINTENANCE REQUIREMENT�FOR�TORMWATER FACILITIES AND ON-�ITE BMP� t ,, ��7► 3 DETEIN"��C11y"�'�+►I�IK3�Vt7!;V,�4t�LTS MAINTENANCE DEFECT OR CONDITIONS WHEN RESULTS EXPECTED WHEN COMPONENT PROBLEM MAINTENANCE IS NEE[�E[� MAINTENANCE IS PERFORMEv Site Trash and debris Any trash and debris which exceed 1 cubic Trash and debris cleared from site. foot per 1,000 square feet(this is about eG��al#o the amo�n!of#ra�h it wo��l�take to fill up one standard�ize office garbage can).In general,there should be no visual evidence of dumping. Noxious weeds Any noxious or nuisance vegetation which Nouious and nuisance vegetation removed r�5ay constitute a hazurd to City pe�so`riel accordi�g to applicable regulations.No or the public. danger of noxious vegetation where City personnel or the public might normally be. Contaminants and Any evidence of contaminants or pollution Materials removed and disposed of pollution such as oil,gasoline,concrete slurries or according to applicable regulations.Source paint. control BMPs implemented if approp�ate. No cont2min2nts present other th2n 2 surface oil film. Excessive growth of Grass or groundcover exceeds 18 inches Grass or groundcover mowed to a height grass/groundcover in height. no greater than 6 inches. Tank or Vault Trash and debris Any trash and debris accumulated in vault No trash or debris in vault. Storage Area or tank(includes floatables and non- floatables). Sediment Accumulated sediment depth exceeds All sediment removed from storage area. accumulation 10°/a of the diameter of the storage area for '/z length of storage vauR or any point depth exceeds 15%of diameter.Example: 72-inch storage tank would require cleaning when sediment reaches depth of 7 inches for more than%z length of tank. Tank Structure Plugged air vent Any blockage of the vent. Tank or vault fresly vents. Tank bent out of Any part of tank/pipe is bent out of shape Tank repaired or replaced to design. shape more than 10%of its design shape. Gaps between A gap wider than%z-inch at the joint of any No water or soil entering tank through sections,damaged tank sections or any evidence of soil joints or walls. joints or cracks or particles entering the tank at a joint or tears in wall through a wall. Vault Structure pamage to wall, Cracks wider than'/-inch,any evidence of Vault is sealed and structurally sound. frame,bottom,and/or soil errtering the structure through cracks top slab or qualified inspection personnel determines that the vauR is not structurally sound. InIeUOutlet Pipes Sediment Sediment filling 20%or more of the pipe. Inlet/outlet pipes clear of sediment. accumulation Trash and debris Trash and debris accumulated in No trash or debris in pipes. inleUoutlet pipes(includes floatables and non-floatables). Damaged inlet/outlet Cracks wider than'/z-inch at the joint of the No cracks more than'/<-inch wide at the pipes inleUoutlet pipes or any evidence of soil joint of the inleUoutlet pipe. entering at the joints of the inleVoutlet pipes. Access Manhole Covedlid not in place Covedlid is missing or only partially in Manhole access covered. place.Any open manhole requires immediate maintenance. 12/12/2016 2017 City of Renton Surface Water Design Manual A-6 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-9 of 28 Record Date:ll/14/2022 8:01 AM King County,WA APPENDIX A MAINTENANC'E REQi7IREMENT�FOR�TORMWATER FACILITTE�AND ON-SITE BMP� �,� �,„ .;, r.„..� ..", ; :;,, „ '. �,.... , ., :z. �-,w„, ,. � ,. ,, NO 3'-,[3E'I'�hM�`I�1�1 TANK�I�V,D 1(AU1�T� ` '< MAINTENANCE DEFECT OR CONDITIONS WHEN RESULTS EXPECTED WHEN COMPONENT PROBLEM MAINTENANCE IS NEE[�E[� MAINTENANCE IS PERFORMEv Access Manhole Locking mechanism Mechanism cannot be opened by one Mechanism opens with proper tools. (cont.) not working maintenance person with proper tools. Bolts cannof be cea#e�.Self-locking cover/lid does iiotwork. Covedlid difficult to One maintenance person cannot remove Covedlid can be removed and reinstalled remove covedlid after applying�0 Ibs of lift. by one maintenance person. Ladder rungs unsafe Missing rungs,misalignment,rust,or Ladder meets design standards.Allows cracks. irainterarce person safe access. Large access pamaged or difficult Large access doors or plates cannot be Replace or repair access door so it can doors/plate to open opened/removed using normal equipment. opened as designed. Gaps,doesn't cover Larqe access doors not flat and/or access poors close flat;covers access opening completely opening not completely covered. completely. Liking rings missing, Lifting rings not capable of lifting weight of Lifting ings sufficient to lift or remove door rusted door or pl2te. or pl2te. 2017 City of Renton Surface Water Design Manual 12/12/2016 A-7 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-10 of 28 Record Date:ll/14/2022 8:01 AM King County,WA APPENDIX A MAINTENANCE REQUIREMENT�FOR�TORMWATER FACILITIES AND ON-�ITE BMP� „ �. �. '��1� � ��iVIM A�,4�,R.1��11l�Vyr'��'�'1�.�4��•`,1�4.��1.�>��)G'4; .�>„ � i � r, �n . ,,,.�: , ,., , �.., , . , , ,.,, „�.i„�. , �. ,. , � .. .Y . ,,,,. >>�s ' «< ,i. s�,��;�,... ,, r '"a;" ir „<�;,k .�. x'n,. .. . ,>y. ., MAINTENANCE DEFECT OR CONDITION WHEN MAINTENANCE RESULTS EXPECTED WHEN COMPONENT PROBLEM IS NEE[�E[� MAINTENANCE IS PERFORMEv Structure Trash and debris Trash or debris of more than%cubic foot No Trash or debris blocking or potentially which is located immediately in front of the blocking entrance to structure. atn!ct�!re opening or iQ blocking capaci#y of the structure bv more thai i 10 io. Trash or debris in the structure that No trash or debris in the stn!cture. exceeds�/g the depth from the bottom of basin to invert the Iowest pipe into or out of the basir. Deposits of garbage exceeding 1 cubic No condition present which would attract or foot in volume. support the breeding of insects or rodents. Sediment Sediment exceeds 609'0 of the depth from Sump of structure contains no sediment. accumulation the bottom of the structure to the invert of the lowest pipe iiito or out of the structure or the bottom of the FROP-T section or is within 6 inches of the invert of the lowest pipe into or aut of the stn�r_:t�re or the bottom of the FROP-T section. Damage to frame Comer of frame extends more than'/<inch Frame is even with curb. and/or top slab past curb face into the street(If applicable). Top slab has holes larger than 2 square Top slab is free of holes and cracks. inches or cracks wider than'/<inch. Frame not sitting flush on top slab,i.e., Frame is sitting flush on top slab. separation of more than s/.inch of the frame from the top slab. Cracks in walls or Cracks wider than'/z inch and longer than Structure is sealed and structurally sound. bottom 3 feet,any evidence of soil particles entering structure through cracks,or maintenance person judges that structure is unsound. Cracks wider than'/z inch and longer than No cracks more than�/,inch wide at the 1 foot at the joint of any inleUoutlet pipe or joint of inletloutlet pipe. any evidence of soil particles entering structure through cracks. Settlement/ Structure has settled more than 1 inch or Basin replaced or repaired to design misalignment has rotated more than 2 inches out of standards. alignment. Damaged pipe joints Cracks wider than%z-inch at the joint of the No cracks more than'/<-inch wide at the inlet/outlet pipes or any evidence of soil joint of inletloutlet pipes. entering the structure at the joint of the inleUoutlet pipes. Contaminants and Any evidence of contaminants or pollution Materials removed and disposed of pollution such as oil,gasoline,concrete slurries or according to applicable regulations.Source paint. control BMPs implemented if appropriate. No contaminants present other than a surtace oil film. Ladder rungs missing Ladder Is unsafe due to missing rungs, Ladder meets deslgn standards and allows or unsafe misalignment,rust,cracks,or sharp edges. maintenance person safe access. FROP-T Section Damaged FROP-T T section is not securely aKached to T section securely attached to wall and structure wall and outlet pipe structure outlet pipe. should support at least 1,000 Ibs of up or down pressure. Structure is not in upright position(allow up Structure in correct position. to 10%a from plumb). 12/12/2016 2017 City of Renton Surface Water Design Manual A-8 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-11 of 28 Record Date:ll/14/2022 8:01 AM King County,WA APPENDIX A MAINTENANC'E REQi7IREMENT�FOR�TORMWATER FACILITTE�AND ON-SITE BMP� <:., ,< ,. ,,,. .: , ......�- � .:� .. .. ...... .. .. .::.... � �t�,�-�ca�r'r��tQ�s�rRu��ru��'�Qw R��r�r� MAINTENANCE DEFECT OR CONDITION WHEN MAINTENANCE RESULTS EXPECTED WHEN COMPONENT PROBLEM IS NEE[�E[� MAINTENANCE IS PERFORMEv FROP-T Section Damaged FROP-T Connections to outlet pipe are not Connections to outlet pipe are water tight; (cont.) (cont.) watertight or show signs of deteriorated structure repaired or replaced and works gro�!{. a�decigned. Ariy iioles--othertiiar desigiied holes—i�i Structure i�as ro holes oti�er ti�a��desiqi�ed the stn�ct�re. holes. Cleanout Gate Damaged or missing Cleanout gate is missing. Replace cleanout gate. cleanout gate Cleanout gate is not watertight. Gate is watertight and worlcs as designed. Gate cannot be moved up and down by Gate moves up and down easily and is one maintenance person. watertight. Chain/rod leading to gate is missing or Chain is in place and works as designed. damaged. Orifice PI2te D?m?ged or missing Control device is not working properly due Plate is in place�nd works as designed. orifice plate to missing,out of place,or bent orifice plate. Obstructions to orifice Any trash,debris,sediment,or vegetation Plate is free of all obstructions and works plate blocking the plate. as designed. Overflow Pipe Obstructions to Any trash or debris blocking(or having the Pipe is free of all obstructions and works overflow pipe potential of blocking)the overflow pipe. as designed. Deformed or Lip of overflow pipe is bent or deformed. Werflow pipe does not allow overflow at damaged lip of an elevation lower than design overflow pipe InIeUOutlet Pipe Sediment Sediment filling 20%or more of the pipe. InleUoutlet pipes clear of sediment. accumulation Trash and debris Trash and debris accumulated in No trash or debris in pipes. inlet/outlet pipes(includes floatables and non-floatables). Damaged inleUoutlet Cracks wider than'/z-inch at the joint of the No cracks more than'/<-inch wide at the pipe inlet/outlet pipes or any evidence of soil joint of the inlet/outlet pipe. entering at the joints of the inleVoutlet pipes. Metal Grates Unsafe grate opening Grate with opening wider than�/s inch. Grate opening meets design standards. (If applicable) Trash and debris Trash and debris that is blocking more Grate free of trash and debris.footnote to than 20%of grate surface. guidelines for disposal Damaged or missing Grate missing or broken member(s)of the Grate is in place and meets design grate grate. standards. Manhole Cover/Lid Cover/lid not in place Cover/lid is missing or only partially in Cover/lid protects opening to structure. place.Any open structure requires urgent maintenance. Locking mechanism Mechanism cannot be opened by one Mechanism opens with proper tools. not working maintenance person with proper tools. Bolts cannot be seated.Self-locking covedlid does not work. Covedlid difficult to One maintenance person cannot remove Covedlid can be removed and reinstalled remove cover/lid after applying 80 Ibs.of lift. by one maintenance person. 2017 City of Renton Surface Water Design Manual 12/12/2016 A,9 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-12 of 28 Record Date:ll/14/2022 8:01 AM King County,WA APPENDIX A MAINTENANCE REQUIREMENT�FOR�TORMWATER FACILITIES AND ON-�ITE BMP� i��, �=ear�i�B�srr�s,�rui��v�r+��.�s 3 MAINTENANCE DEFECT OR CONDITION WHEN MAINTENANCE RESULTS EXPECTED WHEN COMPONENT PROBLEM IS NEE[�E[� MAINTENANCE IS PERFORMEv Structure Sediment Sediment exceeds 60%of the depth from Sump of catch basin contains no sediment. accumulation the bottom of the catch basin to the invert of the loweat pipe into or o�t of the catch basin or is within fi ii iches of the irroert of the lowest pipe into or out of the catch basin. Trash and debris Trash or debris of more than%cubic foot No Trash or debris blocking or potentially which is locuted irrrrediately ir front of the blocking eiit�arce to catch basi�i. catch basin opening or is blocking capacity of the catch basin by more than 10%. Trash or debris in the catch basin that No trash or debris in the catch basin. exceeds'/a the depth from the bottom of basin to invert the lowest pipe into or out of the ba�in. Dead animals or vegetation that could No dead animals or vegetation present generate odors thar co�ld cause within catch basin. complaints or dangerous gases(e.g., methane). Deposits of garbage exceeding 1 cubic No condition present which would attract or foot in volume. support the breeding of insects or rodents. Damage to frame Comer of frame extends more than'/<inch Frame is even with curb. and/or top slab past curb face into the street(If applicable). Top slab has holes larger than 2 square Top slab is free of holes and cracks. inches or cracks wider than'/<inch. Frame not sitting flush on top slab,i.e., Frame is sitting flush on top slab. separation of more than'/.inch of the frame from the top slab. Cracks in walls or Cracks wider than'/z inch and longer than Catch basin is sealed and is structurally bottom 3 feet,any evidence of soil particles sound. entering catch basin through cracks,or maintenance person judges that catch basin is unsound. Cracks wider than'/z inch and longer than No cracks more than'/4 inch wide at the 1 foot at the joint of any inlet/outlet pipe or joint of inleboutlet pipe. any evidence of soil particles entering catch basin through cracks. Settlement/ Catch basin has settled more than 1 inch Basin replaced or repaired to design misalignment or has rotated more than 2 inches out of standards. alignment. Damaged pipe joints Cracks wider than'/:-inch at the joint of the No cracks more than'/<-inch wide at the inleUoutlet pipes or any evidence of soil joint of inledoutlet pipes. entering the catch basin at the joint of the inlet/outlet pipes. Contaminants and Any evidence of contaminants or pollution Materials removed and disposed of pollution such as oil,gasoline,concrete slurries or according to applicable regulations.Source palnt. control BMPs implemented if approprlate. No contaminants present other than a surface oil film. InIeVOutlet Pipe Sediment Sediment filling 20%or more of the pipe. InleVoutlet pipes clear of sediment. accumulation Trash and debris Trash and debris accumulated in No trash or debris in pipes. inlet/outlet pipes(includes floatables and non-floatables). 12/12/2016 2017 City of Renton Surface Water Design Manual A-10 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-13 of 28 Record Date:ll/14/2022 8:01 AM King County,WA APPENDIX A MAINTENANC'E REQi7IREMENT�FOR�TORMWATER FACILITTE�AND ON-SITE BMP� �, , � ;�Q, �=='CATC�I�ASfi�V�'ANC9r�M,Af�H�L;�� : �� , �,�� ;, MAINTENANCE DEFECT OR CONDITION WHEN MAINTENANCE RESULTS EXPECTED WHEN COMPONENT PROBLEM IS NEE[�E[� MAINTENANCE IS PERFORMEv InIeUOutlet Pipe Damaged inleUoutlet Cracks wider than'/-inch at the joint of the No cracks more than'/,-inch wide at the (cont.) pipe inleUoutlet pipes or any evidence of soil joint of the inlet/outlet pipe. entering at{he joints of the inlet/outlet pipes. Metal Grates Unsafe grate opening Grate with opening wider than'/s inch. Grate opening meets design standards. (Catch Basins) Trash and debris Trash and debris that is blocking more Grate free of trash and debris.footnote to than 20%of grate surface. guidelines for disposal Damaged oi missing Grate missing or broken member(s)of the Grate is in place and meets design grate grate.My open�tructure requires standards. uraent mPinten�nce. Manhole Cover/Lid Cover/lid not in place Cover/lid is missinq or only partialN in Cover/lid protects opening to structure. pl2ce.Any open s4iucture iequiies urge��t��iaii�teiiaiwe. Locking mechanism Mech?ni�m cannot be opened by one Mech�nism opens with proper tools. not worlcing maintenance person with proper tools. Bolts cannot be seated.Self-locking cover/lid does not work. Cover/lid difficult to One maintenance person cannot remove Covedlid can be removed and reinstalled remove coverllid after applying 80 Ibs.of lift. by one maintenance person. 2017 City of Renton Surface Water Design Manual 12/12/2016 A-11 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-14 of 28 Record Date:ll/14/2022 8:01 AM King County,WA APPENDIX A MAINTENANCE REQUIREMENT�FOR�TORMWATER FACILITIES AND ON-�ITE BMP� ��,� �✓Q��,l�,�l��i��F;, ,��Q��r.��s` ` r , ,s. �.. � „�,, s. � „ „�- , ,,, ",., , .. � F;.,,. a u,t,. . MAINTENANCE DEFECT OR CONDITIONS WHEN RESULTS EXPECTED WHEN COMPONENT PROBLEM MAINTENANCE IS NEE[�E[� MAINTENANCE IS PERFORMEv Pipes Sediment 8 debris Accumulated sediment or debris that Water flows freely through pipes. accumulation exceeds 20%of the diameter of the pipe. Vegetation/root Vegetation/roots that reduce free Water flows freely through pipes. qrowth iii pipe iiioveme��t of waterti�rougi�pipes. Contaminants and Any evidence of contaminan��or poll��tion Materi2ls removed and disposed of pollution such as oil,gasoline,concrete slurries or according to applicable regulations.Source paint. control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Damage to protective Protedive coating is damaged;rust or Pipe repaired or replaced. coating or corrosion corrosion is weakening the structural intesrity of any part of pipe. Damaged pipes Any dent that decreases the cross section Pipe repaired or replaced. area of pipe by more than 20%or is determined to have weakened structural integrity of the pipe. Ditches Trash and debris Trash and debris exceeds 1 cubic foot per Trash and debris cleared from ditches. 1,000 square feet of ditch and slopes. Sediment Accumulated sediment that exceeds 20% Ditch cleanedlflushed of all sediment and accumulation of the design depth. debris so that it matches design. Noxious weeds Any noxous or nuisance vegetation which No�tious and nuisance vegetation removed may constitute a hazard to City personnel according to applicable regulations.No or the public. danger of noxious vegetation where City personnel or the public might normally be. Contaminants and Any evidence of contaminants or pollution Materials removed and disposed of pollution such as oil,gasoline,concrete slurries or according to appllcable regulatlons.Source paint. control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Excessive vegetation Vegetation that reduces free movement of Water flows freely through ditches. growth water through ditches. Erosion damage to Any erosion observed on a ditch slope. Slopes are not eroding. slopes Rock lining out of One layer or less of rock exists above Replace rocks to design standards. place or missing(If native soil area 5 square feet or more,any applicable) exposed native soil. 12/12/2016 2017 City of Renton Surface Water Design Manual A-12 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-15 of 28 Record Date:ll/14/2022 8:01 AM King County,WA APPENDIX A MAINTENANC'E REQi7IREMENT�FOR�TORMWATER FACILITTE�AND ON-SITE BMP� �IC� '��'r"�'"aF��U�D��I��"'r�,�1�� t , ,, <<, , ,. � � , �„ � ; .,, MAINTENANCE DEFECT OR CONDITIONS WHEN RESULTS EXPECTED WHEN COMPONENT PROBLEM MAINTENANCE IS NEE[�E[� MAINTENANCE IS PERFORMEv Site Trash and debris Any trash and debris which exceed 1 cubic Trash and debris cleared from site. foot per 1,000 square feet(this is about eG��al#o the amo�n!of#ra�h it wo��l�take to fill up one standard�ize office garbage can).In general,there should be no visual evidence of dumping. Noxious weeds Any noxious or nuisance vegetation which Nouious and nuisance vegetation removed r�5ay constitute a hazurd to City pe�so`riel accordi�g to applicable regulatiofis.No or the public. danger of noxious vegetation where City personnel or the public might normally be. Contaminants and Any evidence of contaminants or pollution Materials removed and disposed of pollution such as oil,gasoline,concrete slurries or according to applicable regulations.Source paint. control BMPs implemented if approp�ate. No cont2min2nts present other th2n 2 surface oil film. Excessive growth of Grass or groundcover exceeds 18 inches Grass or groundcover mowed to a height grass/groundcover in height. no greater than 6 inches. Trees and Shrubs Hazard tree identified Any tree or limb of a tree identifled as No hazard trees in facility. having a potential to fall and cause property damage or threaten human life.A hazard tree identified by a qualified arboris4 mus4 be removed as soon as possible. Damaged tree or Limbs or parts of trees or shrubs that are Trees and shrubs with less than 5%of total shrub identified split or broken which affect more than 25% foliage with split or broken limbs. of the total foliage of the tree or shrub. Trees or shrubs that have been blown No blown down vegetation or knocked over down or knocked over. vegetation.Trees or shrubs free of injury. Trees or shrubs which are not adequately Tree or shrub in place and adequately supported or are leaning over,causing supported;dead or diseased trees exposure of the roots. removed. 2017 City of Renton Surface Water Design Manual 12/12/2016 A-17 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-16 of 28 Record Date:ll/14/2022 8:01 AM King County,WA APPENDIX A MAINTENANC'E REQi7IREMENT�FOR�TORMWATER FACILITTE�AND ON-SITE BMP� „NC� �'1`-I'�U1�F�`I�TARIIF Fi4�GIl,�T1Y CAR'I'F�1�,G"i"E��I.:'�'�F'i SY�'1'�11►�� , MAINTENANCE DEFECT OR CONDITION WHEN MAINTENANCE RESULTS EXPECTED WHEN COMPONENT PROBLEM IS NEE[�E[� MAINTENANCE IS PERFORMEv In addition to the specific maintenance criteria provided below,all manufacturers'requirements shall be followed. Facility Documentation Update facility inspection record after each Maintenance records are up to date. inspection. Provide certification of replaced filter Filter media is certified to meet media. mani�fac:turer spec:ifications. Site Trash and debris Any trash or debris which impairs the Trash and debris removed from facility. function of the facility. Contaminants and Any evidence of contaminants or pollution Mateials removed and disposed of pollution such as oils,gasoline,concrete slurries or according to applicable regulations.Source paint. control BMPs implemented if appropriate. No contaminsnts present other thsn a surface oil film. Life cycle Once per year. Facility is re-inspected and an_y needed m2inten2nce performed. Vault Treatment Sediment on vault Varies—Refer to manufacturers Vault is free of sediment. Area floor requirements. Sediment on top of Varies—Refer to manufacturer s Vault is free of sediment. cartridges requirements. Multiple scum lines Thick or multiple scum lines above top of Cause of plugging corrected,canisters above top of cartridges.Probably due to plugged replaced if necessary. cartridges canisters or underdrain manifold. Vault Structure pamage to wall, Cracks wider than'/�-inch and any Vault replaced or repaired to design frame,bottom,and/or evidence of soil particles entering the specifications. top slab structure through the cracks,or qualified inspection personnel detertnines the vault is not structurally sound. Baffles damaged Baffles corroding,cracking warping,and/or Repair or replace baffles to specification. showing signs of failure as determined by maintenance/inspection person. Filter Media Standing water in Varies—Refer to manufacturers No standing water in vault 24 hours after a vault requirements. rain event. Short circuiting Flows do not properly enter filter Flows go through filter media. cartridges. Underdrains and Sediment and debris Underdrains or clean-outs partially plugged Underdrains and clean-outs free of Clean-Outs or filled with sediment and/or debris. sediment and debris. InIeUOutlet Pipe Sediment Sediment filling 20%or more of the pipe. InleVoutlet pipes clear of sediment. accumulation Trash and debrls Trash and debrls accumulated In No trash or debris In plpes. inleVoutlet pipes(includes floatables and non-floatables). Damaged inleVoutlet Cracks wider than'/z-inch at the joint of the No cracks more than'/<-inch wide at the pipe inlet/outlet pipes or any evidence of soil joint of the inlet/outlet pipe. entering at the joints of the inleUoutlet pipes. 2017 City of Renton Surface Water Design Manual 12/12/2016 A-31 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-17 of 28 Record Date:ll/14/2022 8:01 AM King County,WA APPENDIX A MAINTENANCE REQUIREMENT�FOR�TORMWATER FACILITIES AND ON-�ITE BMP� t ,j��r-��ca�R��r��►c��.rr�c�-r��v��r�.'r��s�r��n� , MAINTENANCE DEFECT OR CONDITION WHEN MAINTENANCE RESULTS EXPECTED WHEN COMPONENT PROBLEM IS NEE[�E[� MAINTENANCE IS PERFORMEv Access Manhole Cover/lid not in place Covedlid is missing or only partially in Manhole access covered. place.Any open manhole requires immedia4e main4enance. Locki��g i�ieci�ariisrr Mechaiiisrn caiaiot be ope�ied by o�ie Meci�ariisrii opeiis witi�proper tools. not working maintenance person with proper tools. Bolts cannot be seated.Self-locking cover/lid does not work. Cover/lid difficult to Oiie r��aii�teriaiice persoi�caiii�ot rer�iove Cover/lid caii be rer�ioved arid rei��stalled remove cover/lid after applying 80 Ibs of lift. by one maintenance person. Ladder rungs unsafe Missing rungs,misalignment,rust,or Ladder meets design standards.Allows cracks. maintenance person safe access. Large Access Damaged or difficult Large access doors or plates cannot be Replace or repair access door so it can Doors/Plate to open opened/removed using normal equipment. opened as designed. Gapc,doecn't cover L2rge?ccess doors not flat and/or accecc Doors cloce fl?t 2nd cover accecc opening completely opening not completely covered. completely. LiRing Rings missing, Lifting rings not capable of lifting weight of Lifting rings sufficient to lift or remove door rusted door or plate. or plate. 12/12/2016 2017 City of Renton Surface Water Design Manual A-32 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-18 of 28 Record Date:ll/14/2022 8:01 AM King County,WA APPENDIX A MAINTENANCE REQUIREMENT�FOR�TORMWATER FACILITIES AND ON-�ITE BMP� � „ „ �c� ,�s` �r,�?1v�;v�c�TA��`sU��ac�Jt�A�r�r��r,�`r��ascA�'�� , ,, " MAINTENANCE DEFECT OR CONDITION WHEN MAINTENANCE RESULTS EXPECTED WHEN COMPONENT PROBLEM IS NEE[�E[� MAINTENANCE IS PERFORME[� Site Trash and debris Trash and debris accumulated on the Native vegetated surface site free of any native vegetated surface/native vegetated trash or debris. lan��cape�ite. Vegetatior Irsufficier�t vegetatior Less thaii two species eacii of iiative A ririr�iurr of two species eaci�of native trees,shn!bs,and gro�ndcover occ�r in trees,shr�!bs,and gro�ndcover is the design area. established and heaRhy. Poor vegetation Less than 90%if the required vegetated A minimum of 90%of the required coverage area i�as healthy growti�. vegetated area i�as healthy growti�. Undesirable Weeds,blackberry,and other undesirable Less than 10%undesirable vegetation vegetation present plants are invading more than 10%of occurs in the required native vegetated vegetated area. surface area. Vegetated Area Soil compaction Soil in the native vegetation area Less than 8%of native vegetation area is compacted. compacted. Insufficient veget?tion Le�s th�n 3.5 squ�re feet of n�tive A minimum of 3.5 squ�re feet of n�tive vegetation area for every 1 square foot of vegetation area for every 1 square foot of impervious surface. impervious surface. Excess slope Slope of native vegetation area greater Slope of native growth area does not than 15%. exceed 15%. �VU.�9�PEf��'OR�41"�@ PIR�C@NN��TI(�I�IS E3M�',;,, r MAINTENANCE DEFECT OR CONDITIONS WHEN RESULTS EXPECTED WHEN COMPONENT PROBLEM MAINTENANCE IS NEEDED MAINTENANCE IS PERFORMED Preventive Blocking,obstructions Debris or trash limiting flow into perforated Outfall of BMP is receiving designed flows pipe system or outfall of BMP is plugged or from perforated pipe connection. othervvise nonfunctioning. Inflow Inflow impeded Inflow into the perforated pipe is partially or Inflow to the perforated pipe is unimpeded. fully blocked or altered to prevent flow from getting into the pipe. Pipe Trench Area Surface compacted Ground surface over the perforated pipe Ground surface over the perforated pipe is trench is compacted or covered with not compacted and free of any impervious impermeable material. cover. Outflow Outflow impeded Outflow from the perforated pipe into the OutFlow to the public drainage system is public drainage system is blocked. unimpeded. Outfall Area Erosion or landslides E�astence of the perforated pipe is causing Perforated pipe system is sealed off and or exasperating erosion or landslides. an alternative BMP is implemented. 12/12/2016 2017 City of Renton Surface Water Design Manual A-40 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-19 of 28 Record Date:ll/14/2022 8:01 AM King County,WA APPENDIX A MAINTENANC'E REQi7IREMENT�FOR�TORMWATER FACILITTE�AND ON-SITE BMP� o- ,;:�0'30' P�1�ME�L�f'A�/�11��IVT BIVI�" ,. �,.��,., � , ; �. _ ., . „. , � ,, , , .,k . �, , �.. ,i MAINTENANCE DEFECT OR CONDITIONS WHEN RESULTS EXPECTED WHEN COMPONENT PROBLEM MAINTENANCE IS NEEGE[� MAINTENANCE IS PERFORME[� Preventive Surface cleaning/ Media surface vacuumed or pressure No dirt,sediment,or debris clogging vegetation control washed annually,vegetation controlled to porous media,or vegetation limiting �esign ma�cim�!m.Wee�growth infiltration. suggesting sedinient accwriulatioii. Porous Concrete, Trash and debris Trash and debris on the pavement No trash or debris interfering with Porous Asphakic interfering with infiltration;leaf drop in fall infiltration. Concrete,and season. Pemieable Pavers Sedineiit Sedir��eiit accu��iulatioi�oi�ti�e paver�ient Fave�i�ent infiltrates as designed;adjacent accumulation interfering with infiltration;runoff from areas stabilized. adjacent areas depositing sedimenUdebris on pavement. Insufficient infiltration Pavement does not infiltrate at a rate of 10 Pavement infiltrates at a rate greater than rate iriches per hour. 10 iri�hes per hour. Excessive ponding Standing water for a long period of time on Standing water infiltrates at the desired the surface of the pavement. rate. Broken or cracked Pavement is broken or cracked. No broken pavement or cracks on the pavement surface of the pavement. Settlement Uneven pavement surface indicating Pavement surface is uniformly level. settlement of the subsurface layer. Moss growth Moss growing on pavement interfering with No moss interferes with infiltration. infiltration. Inflow restricted Inflow to the pavement is diverted, Inflow to pavement is unobstructed and not restricted,or depositing sediment and bringing sediment or debris to the debris on the pavement. pavement. Underdrain not freely Underdrain is not flowing when pavement Underdrain flows freely when water is flowing has been infiltrating water. present. Overflow not Overflow not wntrolling excess water to Overflow permits excess water to leave the controlling excess desired location;native soil is exposed or site at the desired location;Overflow is water other signs of erosion damage are present. stabilized and appropriately armored. Permeable Pavers Broken or missing Broken or missing paving blocks on No missing or broken paving blocks pavers surface of pavement. interfering with infiltration. Uneven surface Uneven surface due to settlement or scour Pavement surface is unifomtly level. of fill in the interstices of the paving blocks. Compaction Poor infiltration due to soil compaction No soil compaction in the interstices of the between paving blocks. paver blocks limiting infiRration. Poor vegetation Grass in the interstices of the paving Healthy grass is growing in the interstices growth(if applicable) blocks is dead. of the paver blocks. 2017 City of Renton Surface Water Design Manual 12/12/2016 A-41 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-20 of 28 Record Date:ll/14/2022 8:01 AM King County,WA APPENDIX A MAINTENANCE REQUIREMENT�FOR�TORMWATER FACILITIES AND ON-�ITE BMP� � Na �'i,w-�31dR.�`fEl�'1`ICII�$MP � MAINTENANCE DEFECT OR CONDITIONS WHEN RESULTS EXPECTED WHEN COMPONENT PROBLEM MAINTENANCE IS NEEUE[i MAINTENANCE IS PERFORME[� Preventive Vegetation Vegetation to be watered and pruned as Healthy vegetation growth with full needed and mulch applied to a minimum of coverage as designed. 2 inches#o maintain healthy growfh. Bioreteiition Area Trasi�and debris Trasi�and debris ii�ti�e biorete��tioii area; No trasi�or debris I��the bioretentioi�area. leaf drop in the fall season. Sediment Sedimant accumulation in the bioretention Water in the bioretention infiltrates as accumulation area interfering with infiltration. designed. Excessive ponding Standing water in the bioretention area for Standing water infiltrates at the desired more than two days. rate. Inflow restricted Inflow not getting into bioretention; Unodstruded and properly routed inflow debris/sediment blockage at inlet features; into bioretention area;inlet is stabilized and native soil is e�cposed or other signs of appropriately armored. erosion damage is present. Overflow not Overflow wa.ter not controlled by outlet Outlet fe?tures control overflow;overflow is controlling excess features;native soil is exposed or other stabilized and appropriately armored. water signs of erosion damage is present. UndeMrain not freely Underdrain is not flowing when bioretention Underdrain flows freely when water is flowing area has been infiltrating water. present. Vegetation Poor vegetation Plants not thriving across at least 80%of Healthy water tolerant plants in coverage the entire design vegetated area within the bioretention area,plants thriving across at BMP;overly dense vegetation requiring least 80%of the entire design vegetated pruning. area within the facility. Insufficient vegetation Plants not water tolerant species. Plants are water tolerant. Weeds present Weeds growing in bioretention area. No weeds in bioretention area. Watering not Planting schedule requires frequent Plants are established and thriving occurring watering(approx.weeklyYear 1,bimonthly Years 2 and 3)for new facilities,and as needed for established plantings or dry periods Pest control Signs of pests,such as wilting or chewed Plant community is pest-free when leaves or bark,spotting or other indicators; following an approved Integrated Pest e�dended ponding period encouraging Management plan;bioretention functioning mosquitoes normally and ponding controlled as needed for pest control Containment Berm Erosion Erosion occurring at earthen slopes or Erosion on the containment berm and side and Earthen Slopes containment berm side slope. slopes has been repaired and the cause of the erosion corrected. Voids created by Voids affecting berm integrity or creating Voids have been repaired;facility is free of nuisance animals leaky pond condition nuisance animals following an approved (e.g.,rodents)or tree Integrated Pest Management plan. roots Settlement Any part of the containment berm top has A minimum of 6 inches freeboard from the less than 6 inches of freeboard from the ma�timum pond level to the top of the maximum pond level to the top of the berm. berm. Amended Soil Poor soil nutrients Soil not providing plant nutrients. Soil providing plant nutrients. Bare spots Bare spots on soil in bioretention area. No bare spots,bioretention area covered with vegetation or mulch mixed into the underlying soil. Compaction Poor infiltration due to soil compaction in No soil compaction in the bioretention the bioretention area. area. 12/12/2016 2017 City of Renton Surface Water Design Manual A-42 Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-21 of 28 Record Date:ll/14/2022 8:01 AM King County,WA STORMTECH SYSTEM - O&M MANUAL ��i h„42 it f'"`�f it �N�F� � t l �ht; t d f -{�i�„ a. (}.,�,r� � t,n,,, :, s�ra,, .t,,r �.,��,� `��+, u�r fIV'TF�ODl1CTlC�Id ,�n import�nt component of any Stormwater Pcsllution�r�verrtion Plan is inspection and maintcrranee.Th�SkarmTech Isalator Row is a kechniqu�to inexp�nsively enhance Tatal Susp�nded Solids(TS�) removal and�arovid�eas�-deeess Tvr i��g��:iivr de�w rr�dii��di�4�. T'Fi�IS�LATC)R ROVI/ 7he I�olatc�r Row is a row af StarmTech chambers,�ither S�-160LP, SG-310,SC-31Q-3,SC-74d,DC-78Q,fViC-3500 or IViC-4500 models, that is surrounded with fil�t�r fabric arrd connected to a closely locateci manhole for easy acc�ss.The fabric-vdrapped chambers pravide for settling�nd filtratBon of�ediment as st�rm water rises in the Isolator Finw and ultimately pa�ses�hrc�ugh the filter fabric.The open be�ttom chamb�rs anci perfora4eci sidewall�(SC-310,SC-31Q-3 and SC-740 madels)allaw storm vvater to flavrr both v€�rtically and horizontally out of th�chambers.S�diments are captured in the Isolafor�ow protecting the storage areas of the aeljacent stone anel chambers from sediment flGGUf11UI2t1011. Two clifferent fabrics are used fior the Isal�tar Raw.�vaoven geatextile fabric is placed betvdeen the stane and the IsolatQr Raw chamb�rs. 7h�tough geotextile provides a media for st�rm water filtration�nd pravide�a durable surface for mainten�nce operation�.It is aiso designed tc�prevent scour of the underlyirrg stone and remain intact during high pressure jetting.A nan-rnroven fabric is plac�d av�r the chambers to pravide a filter meclia for flaws pas�ing through the perfarations in the sidewall of the chamber.Th�nan-waven fabric is nat requireel over th��C-1��L6�,�G-780,RIiG3500 or�VIC-4500 rne�del��s thes�chamber°s do not have perfiarated side walls. Storm'T�ch Isolat�r�ovv�ith The IsalatQr Fivvu is typically designed ta eapture the`"first flush"�nd Overfl�w Spellway(not to scale) off�rs fhe versatility to�e sized arr a valume basis or flow rate basis. �,�r�oN�. An ups�rearn rnanhale not anly pravides acce�s to the Isalatar Fiaw bu� PRE-TRFl\TMEM typically includes a high flow v�reir such that storm dvater flovvrates or �rolumes that exceee!the capacity of the Isalator Row avertap the over ,o;�T�Ro„� flow vveir and discharge thr�ugh a manifold ta the other charnbers. The Ise�lat�r Fdow may alsQ be parr of a tre�tment teain. �y tr�a4irrog �"��; =��°��, � �� ^��'�%, storrn water prior to entry into the chamber system,th�service lif�can ""�"'w,�; '`� '� � "� � � be extencled anci p�llu�ants such as hydrocarbans can be captured. °vER W°R Sf�T—� � i i Pre-treatment best managemenf practices can be as simple as ��[��-� deep sump c�tch basin�,oil-water separators or can be innovative �� sfarm wa4er tr�atment devices.The design of the treatment train and � selection af pretreatment devic�s k�y the design engineer is often EC HFAUER driven by regulatary require�rrents.Wh�ther pretreatment is us�d or not, �� the I�olatar Rovv is recomm�n�ed by StormTech as an�ffec:tive means 1�� to minimize maintenance requirements and mainterrance costs. -�—� /Vo�e: See the S4ormTech D�sign fVlanual for defailed informatian on � designing inlets for a S�ormTech syst�m,including the lsolatar Row. a�,a�,�_ ACCESS �57nRMTECH CHAMBERS Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-22 of 28 Record Date:ll/14/2022 8:01 AM King County,WA !'i„i � � �� , �� r�',x�,�`Y+r,'f.'�r,`'S ��r.�l,,,,.:'�t�",`"' ��"�ry i 2' l� h.� � s io� �'i�' 1�((t�� ('�,�'a��t, �j�{ 1��"1� f}h Ia rl#�(ti�i t�,�}�a (� �'� sd. .U,�i<< �,.}&�ss� 18 1��''�tt {,�}�, if\1r.0 ��',6kV,, dv„_�)!.� ,�u� 4e� x, �I�e7��4/� The frequency of inspection��;^¢�.^.�::r4 v::Bcv�y!.^,^:#�^::.n routine insprection schedule needs tv,be e�ta�li�k�e�#c�r�act��di�iru!a! 6ocation�aseci upan site specific variables.The type of Band u�e(i.e. industrial,comm�rcial,residenfi�l},anticipated pall�tant laad,percent im�aerviausn�s�,climate,eta all play a critical role in d�termining the actual frequency of inspectian and maintenance practices. At a rn6rrirnurn,StormTe�h recommends annual inspectiorrs.Initially, the Isalatar Fiaw should be inspected ev�r�6 months for the first pear of operatiQn�EQr��bses�u�n�_�r��rs,th�insoec��tion should be adiusted based up�n previous abs�rvation af s�diment d�pasition. Th�lsolatc�r Ravu incarparates a cambinatian oi standard manhale(s}and sfrategically lacated inspection ports (as needed).The ins�ectian p�r�s allow for easy access ta the system from the surface,eliminating the need to perfvrm a canfined s�ace entr�a for in�pection purposes. If upon visual inspection it is faund that sediment has accumulated,a stadia rod should be inserted to deter�nin�the depth of�ediment.Wh�n the averag�depth of sediment ezcceeds�inch�s throughout the length �f fhe Isolator Row,clean-aut shauld be perfarm�d. RAAiIVTEfVt�fVCE The Isal�tor Row was designed to reduce tF�e�ast of p�ri�dic maintenance.By"i�alating99 sediments to jus4 ane row,�osts are dramatically r�duced by eliminating th�ne�d to clear�out each raw�f'fFte en�ire s�c�rage bed.If ins�ecti�n indicates the potential need far rnaintenance,access is pravidee!via a manhol�(s)lacated orr the enel(�)of tYre ravv for cleanout.If entry into the manhale is reg�aired9 please fe�llow I�cal and OSHA rules for a canfined��ace entri�s. Maintenarrce is accomplished with the JetVac process.Th�JetVac pr�cess utilizes a hic�h�ressure water nozzl�ta propel itself dorrvn the Isolator Row while scauring and suspendin�s�dirnents.As th�no�zle is retrieved,the captured pollutants are flushed faack inta the manhole for vacuuming.Most sev�rer and pipe rriaintenance campanies ha�re vacuum/JetVac corr�bination vehicl�s.Selection c�f an apprapriate JetVac nozzle will improve rrraintenanc�efficiency.Fixed nozzl�s clesigned far culverts or Iarge diameter pip�cleaning are preferable.R�ar facing jets with an�ffective spread of at leasf 45"are best.fVlast Je'tVac reels have 40(1 feet of ho��allo�nring maintenance of an Isc�lator Raw up fa 50 chambers long.T'h�Jet'04��pr�cess sh�ll only be�erformecl on Storrinl'e�k�Isol�tor F�o�s that hawe AASHTQ�class 1 �oven geoteactile(as s�ecified by S4orrnTech)over tf�eir ar�gular base�tane. Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-23 of 28 Record Date:ll/14/2022 8:01 AM King County,WA I�'' �` t Il �� ' � 2 �ii pti A�r ;k xor �� r�fr4� �b�I� ��'(;j � n" �` � ��yii��a D�t� m m�,�f �i:. ��t v m �jf�� aarc a��o�»<�,:,�}�l,!°�,.�k�,�i<'tr 1r�,�,,a�,{�;� 4��,k,�ts� �hd lN, it d e �,.�tie,, r,�tr��a�kt,�ti� �af i,a 7t��,x��U�Sk��<<,"��u #��, „ 4,��,. �,,, ��.�sr,.��a?�,a„�5,ar,?v S'TEP 1 Inspect Isolatpr F�aw for seeiiment. A)Inspectian ports(if present) i. Remcave lic!frcam floar taax frarne ii. Rerr�ove cap frorn inspectian riser iii. Usin��#V2vh!�y"#�,^,�v#:�Er rw�,w;avd:;r��h m¢vv�;:nG;;:a,^,�:�v^,r�ravultv:;::;;;�6;;±a;;r;;r`:.^,�. iv. If sediment is at-��baue�_i -pro�ee�ta 2.lf-�at,-{�r�c�ed-#a�te�-�. �)All Isolator Raws i. Rernove ce�ver fram rn�nhole at upstream end af Isolator Raw ii. Usirrg a flashlight,inspe�t ciown Isalatar Raw thraugh autlet pip� 1. �lirrors an pal�s ar cameras mau be used_to avoid_a confined space entry 2. Fallaw OSHA reg�ulatians for confir�eci s�ace entry if entering manhole iii. If sediment is at ar abvve the lower rovv vf sidevvall hales(approximately 3 inches),proceed fa Step 2. If not,praceed to Step 3. S7EP 2 Clean out Isalatar Row using th�JetVac process. A)A fixed floar cleaning nazzle with rear facing nozzle spreaci af 45 inches ar mare is preferable �)Apply multiple passes af JetVac until k�ackflush water is clean C)Vacuum manhole sum�a asYequired ST�P 3 �e�l�ce all caps,lids and covers,receard obs�rvatians ar�d actians. S�C�P 4� Insp�ct&�lean catch basins and manhales upstream of the StormTech systern. �)a) _2 -�)N 4 a ��1�R�tE�/��L�� t (�4�'�f�ffi$.'�41r16�`✓ tt r+1£aii�i��3a�{itl\tl�r"�rFt„ '�1 �w: �, §ts��tf7�,1��Y��rlr �i��k��r�{9 �I{{,'L�;%��rJ�ii ,ms tn �ttt xi�'ii}�4t4�F S�lElr-�$�„n s�,x rp��il��a a�at��; sS t L. y i��l�t�tl4:t t fitf R ;{�,i� YYtJI d � � rt f 1 }„f f .:; r F�(�)��J� t�?JIf36`i��'i);s � ltf`'s}i�r��ix�5�t.��i �t !^, ' �'� � �t i �'ih\G��"t'�1� i'�r i�h �. . � 7L�. I�7}{i'�,lA��iti t�%f fz u ttl a t�s�,41�§ ,4� n>�t,t�v�t I�s "t,ce��int�S��.f�$�y� r �i tt 4ti.<,t«..�.: <<s. ,� :. vr 2lF ��s��Srt�,��si�,� �i:.Jw tt'�'�y��;�rl#�>r��. !�A ��a I aiz�h6:��SChf.�")e,i�%��„a'u,ta3rr��,� � ts a�.;:ts..i4Fs%�{„x,i„��.,��;�,.��{na�l.,i�;�Aa , ,-� .s:5z..�:i >7}��u:'�,t�:lrshi�l�isj�,,�.�fr�hi a .,waa �,a�,. t.>.,»;s$,��n�#�� 5��.1 ��Z.�� rrt�rn� � �Pe��,a ttin.kanh�caCfa��, f�L�r��SrvCwt�Cs rc�� m.nn, �aP: �� r�� A'�nc?�.� � � � , � €..s . .. �.�., . .,� � _ �w��m .,.� � .... ��._��. ,,,., a n N�'�� .,.,.�� 912�riY�. �fr 2 p 1 � {Sc�rne r4E eC� �Mf � _ � . t � f �6/20/1.3 ( �S Fc a v � Mucky ��L debrGs v4 �ble 4� rnAtakole o,wd.aen � � 1 ( ssvLaLor I�crw rna�w��a+e.Nce du� � � „,�� . .. ., w,_..,, . . �.,�. ei..w,m _._. . .�. ..e,.�_ r .. .�.. ., u ..w_. ,,..., � � ,,.,._ �,. ,.e� � W r., '�"�f7/].3 E 6.3 �� I o �S�s�rzrn�pctELed av�d va�uar.wred ,�1��lu� � Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-24 of 28 Record Date:ll/14/2022 8:01 AM King County,WA Storrr�Teeh M�in#enance Log Project Name: Location• � �� www.stcarmteah.cerm Stadia Bod 6eadings Fixed poirt to chambrr Fixed poirt to top of Srdirrrt Drptk Date bottom(1) sediment(�) (1)_(�) ObservaYions/Aciions Inspecfor Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-25 of 28 Record Date:ll/14/2022 8:01 AM King County,WA MAINTENANCE INSTRUCTIONS FOR PERMEABLE PAVEMENT (NON-VEGETATED) Your property contains an on-site BMP (best management practice) called"perineable paveme�t," which was installed to minimize the stormwater quantity and quality impacts of some or all of the paved surfaces on your property. Permeable pavements reduce the amount of rainfall that becomes runoff by allowing water to seep through the pavement into a free-draining gravel or sand bed,where it can be infiltrated into the ground. "1'his on-site BMY shall be maintained per Appendix A of the City of Renton's Surface Water Design Manual. Permeable Pavements The type(s) of permeable pavement used on your property is (CHECK THE BOX(ES)THAT APPLY): I� Porous concrete I,� Porous asphalt ❑ Permeable pavers ❑ Modular grid pavement MAINTENANCE RESTRICTIONS The area covered by permeable pavement as depicted by the site plan and design details must be maintaincd as permeable pavement and may not be changcd without written approval from the City of Renton or through a future development permit from the City of Renton. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES • Permeable pavements must be inspected after one major storm each year to make sure it is working properly. More frequent inspection is recommended. • Prolonged ponding or standing water on the pavement surface is a sign that the system is defective and may need to be replaced. If this occurs, contact the pavement installer or the City of Renton for further instructions. • A typical permeable pavement system has a life expectancy of approximately 25 years. To help extend the useful life of the system,the surface of the permeable pavement should be kept clean, stable and free of leaves, debris, and sediinent through regular sweeping or vacuuin sweeping. Aggregate fill in modular grid pavement may need periodic surface replenishment. • The owner is responsible for the repair of all ruts, deformation, and/or broken paving grids or pavers. • Modular grid pavement and permeable pavers filled with gravel or with gravel in the joints may need to be refilled periodically. Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-26 of 28 Record Date:ll/14/2022 8:01 AM King County,WA MAINTENANCE INSTRUCTIONS FOR A BIORETENTION CELL Your property contains an on-sitc BMP (bcst managcmcnt practicc) callcd"bioretention,"which was installed to mitigate the stormwater quantity and quality impacts on both the impervious (paved or roo fl and pervious surfaces (lawn or landscape) on your property. Bioretention cells, like rain gardens, are vegetated closed depressions or ponds that retain and filter stormwater from an area of impervious surface or nonnative pervious surface. Bioretention cells rely on effective infiltration performance more so than rain gardens. The soil in the bioretention cell has bccn cnhanccd to cncouragc and support vigorous plant growth that scrvcs to filtcr thc watcr and sustain a minimum infiltration capacity. Depending on soil conditions,bioretention cells may have water in them throughout the wet season and may overflow during maj or storm events. However, standing water can also be an indicator that periodic maintenance is required to sustain infiltrative performance. This on-site BMP shall be maintained per Appendix A of the City of Renton's Surface Water Design Manual. MAINTENANCE RESTRICTIONS The size,placement, and design of the rain garden as depicted by the site plan and design details must be maintained and may not be changed without written approval from the City of Renton or through a future development permit from the City of Renton. Chemical fertilizers and pesticides must not be used. INSPECTION FREQUENCY AND MAINTENANCE GUIDELINES • Bioretention cells must be inspected annually for physical defects and sediment accumulation. • Biorctcntion cclls have inflow and overflow inlets and outicts. These need to bc maintained to ensure that water is moving into and out of the bioretention area. Check inlets/outlets for debris/sediment blockage,bare spots (exposed soil), or other signs of erosion damage (soil movement). Remove debris and obstructions as necessary. • After maj or storm events,the bioretention cell should be checked to see that the overflow system is working properly and sedimentation is not occurring at the inlet. If erosion damage or bare spots are evident,they should be stabilized with soil,plant material,mulch, or landscape rock. Sediment deposits should be carefully removed and the sediment source eliminated. • Plants must be adapted to wet winter conditions and dry summer conditions. Vegetation is to be watered and pruned as needed. • Frequent watering is required to keep the plants healthy: o Year 1: weekly, o Year 2: bimonthly, o Year 3: bimonthly, o Year 4 and beyond: as needed for established plantings and dry periods. • Chemical fertilizers and pesticides must not be used. • Bioretention soil must be replaced in areas where sediment accumulation is preventing adequate infiltration of water through the soil. Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-27 of 28 Record Date:ll/14/2022 8:01 AM King County,WA • Compactcd soil should bc dccompactcd. • Trash and debris must be removed often from the bioretention depression. • Mulch must be applied to bare soil at a minimum of 2 inches to maintain healthy growth. • Compost may be added if soil nutrients are no longer adequate to support plant growth. • Plant matcrials may bc changcd to suit tastes. • Vegetation should be maintained as follows: 1) Replace all dead vegetation as soon as possible; 2) Remove fallen leaves and debris as needed; 3) Remove all noxious vegetation when discovered; 4) Manually weed without herbicides or pesticides; 5) To protect infiltration performance, do not compact soils in the bioretention cell with heavy maintenance equipmcnt and/or cxcessive foot traffic; 6) During drought conditions,use mulch to prevent excess solar damage and water loss. RECORDING REQUIREMENT These bioretention on-site BMP maintenance and operation instructions must be recorded as an attachment to the required declaration of covenant and grant of easement per Requirement 3 of Section C.13.4 of the City of Renton Surface Water-Design Manual. The intent of these instructions is to explain to future property owners,the purpose of the BMP and how it must be maintained and operated. These instructions are intended to be a minimum;the City of Renton may require additional instructions based on site-specific conditions. See the City of Renton's Surface Water Design Manual website for additional information and updates. Instrument Number: 20221114000186 Document:COV Rec: $230.50 Page-28 of 28 Record Date:ll/14/2022 8:01 AM King County,WA TYPICAL BIQ1tET�NTION CE�I��SPILLWAY(�R C�TCH I3ASTN OI7'TLET) ROCKED SPILLWAY,2'Wx4'L (OR BEYOND BERM IF LONGER),OVERFLOW TO A � VEGETATED SUITABLE DISCHARGE AREA COMPACTED ."'�"� \IG .-""'^ \Il. .*n�` \Ili,.. '� \IG '""� \Ili. 11/a. .,,w•� Yl EARTH BERM ��,. .� �� v °'. ,wu . W � � W . . � . W . . W . �'� �io. . . . . . . . . . . . . � -��^• �ui�.� /TREES,SHRUBS � � x�� i� �� , �,. � �. �� w. BIORETENTION AREA .'m". \Vi.� � � "w^" \Il,,. �•�+� '"'" � � _ GROUND COVER � ��^� '�°`� .,eQ �u�r ..��,.. �ii ui. �- .�. � . ., . . „ . ��- .,.y .,a�a \U. „wu,� �U� .om.,, \IL un,,, .\I/e. .au�,� .\IG, a�n.. \Ilir ' SVc� ..aw ��. ..xn�. \IG PLAN VIEW A NTS TREES TREES � 6"MIN FREEBOARD �,�'�'�'�, � ABOVE OVERFLOW WS �-��,,,.�� f _ TO TOP OF BERM OR ��c� ADJACENT ROADWAY �� GROUND SHRUBS �I 2�MIN TOP WIDTH ��/j\/j 7� \ � \\�\\�\\��\�.�\�� ", _:: ��'��1��%,> COVER ��AiV�jj�V�l�� \ V \� V A, � .�A� .��'� — _ �� /////,�j� OVERFLOW TO 6"MIN TO 12"MAX MAX SLOPE 3H:1V BELOW SUITABLE SURFACE WATER DEPTH OVERFLOW WATER DISCHARGE AREA SURFACE ELEVATION(TYP.) BIORETENTION COMPACTED EARTH SOIL MIX PER � BIORETENTION AREA — BERM(AS NEEDED) REFERENCE 11-C, MIN.18"DEPTH SECTION A-A NTS CATCH BASIN A w/GRATE � 4"RIGID PIPE OUTLET .:�.,. w,,, .^�^ av,. ,b� .w. -��^m �o.. -�m�� .�i� ^ w,z �"^lau� TO STORM SYSTEM �� ,� - � �— .,,. .u4 � VEGETATED �� °" ' " ` ' ' ' " ` ` ` ' ' "'" COMPACTED w� � ,nU �� EARTH BERM, uf TOP WIDTH �� ,� �TREES,SHRUBSI � � °°�� auM 2'MIN .w�, w - � l>``^�`�-�') ��_ ��ao- .,,�,:. BIORETENTION AREA .�,,. �w� (��, �� -�� aio� ��.�� ° °" GROUND COVER, °'� �*"". .,�� w � `�� ..d� �in.. a� .�,��. ,,,w� a . ..� � �� 4 .�,.,. „� .�,.,. �w. .�,. w,�� .g� w� _d� au�F .��u. �� ,. u, �u,�. .a, .>u,.� .,�� i, PLAN VIEW A NTS