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Home My WebLink AboutRC 20260618000994Instrument Number: 20260618000994 Document:COV Rec: S323.50 Page-1 of 21 Record Date:6/18/2026 4:23 PM 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: Unico Longacres Commercial East LLC and Unico Longacres Commercial South LLC Grantee: City of Renton, a Washington municipal corporation Legal Description: New Lots 4, 5, and 6 of Renton LLA LUA23000366, REC. No. 20240301900006 Assessor's Tax Parcel ID#: 0886700220, 0886700130, 0886700210 IN CONSIDERATION of the approved City of Renton (check one of the following) ❑ Residential Building Permit ❑Commercial Building Permit El Clearing and Grading Permit ❑✓ Civil Construction or Utility Permit for Permit(s) CC22005747, PLR-4238 (construction/Building/Utility Permit#) 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-423801 (Project Plan #) on file with the City of Renton and submitted to the City of Renton for the review and approval of permit(s) CC22005747, PLR-4238 (Construction/Building/Utility Permit#). 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 21 Instrument Number: 20260618000994 Document:COV Rec: $323.50 Page-2 of 21 Record Date:6/18/2026 4:23 PM 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 2 of 21 Instrument Number: 20260618000994 Document:COV Rec: S323.50 Page-3 of 21 Record Date:6/18/2026 4:23 PM King County, WA 6. Any notice or consent required to be given or otherwise provided for by the provisions of this Agreement shall be effective upon personal delivery, or three (3) days after mailing by Certified Mail, return receipt requested. 7. With regard to the matters addressed herein, this agreement constitutes the entire agreement between the parties, and supersedes all prior discussions, negotiations, and all agreements whatsoever whether oral or written. 8. This Declaration of Covenant is intended to protect the value and desirability and promote efficient and effective management of surface water drainage of the real property described above, and shall inure to the benefit of all the citizens of the City of Renton and its successors and assigns. This Declaration of Covenant shall run with the land and be binding upon Grantor(s), and Grantor's(s') successors in interest, and assigns. 9. This Declaration of Covenant may be terminated by execution of a written agreement by the Owners and the City that is recorded by King County in its real property records. IN WITNESS WHEREOF, this Declar tion of Coven nt for the Inspection and Maintenance of Drainage Facilities is executed this day of _ a, 20 a GRANTOR, owner oft �eropetrty GRANTOR, owner of the Property Acting Senior Vice President of Portfolio Management of UNIDO INVESMENT GROUP LLG, a Delaware limited liability company STATE OF WASHINGTON ) COUNTY OF KING )ss. i. • ��-. � to me known to be the individual(s) described in and who executed the within and foregoing instrument and acknowledged that they signed the same as their free and voluntary act and deed, for the uses and purposes therein stated. Given under my hand and official seal this Page 3 of 21 Instrument Number: 20260618000994 Document:COV Rec: 5323.50 Page-4 of 21 Record Date:6/18/2026 4:23 PM King County, WA Exhibit A - SITE PLAN IrA� Legend 8" SD @ xx% STORM DRAINAGE PIPE \,' ®e ■�� YD/CO/CB/CB 2/MH Instrument Number: 20260618000994 Document:COV Rec: 5323.50 Page-5 of 21 Record Date:6/18/2026 4:23 PM King County, WA I Legend 8" SD @ xx% STORM DRAINAGE PIPE ®• nco YD/CO/CB/CB 2/MH 41, L '-- Instrument Number: 20260618000994 Document:COV Rec: 5323.50 Page-6 of 21 Record Date:6/18/2026 4:23 PM King County, WA FILTERRA BIOSCAPE STORMWATER TREATMENT FACILITY SITE STORMWATER — DISCHARGE LOCATION SITE STORMWATER DISCHARGE LOCATION FLOOD MITIGATION DISCHARGE LOCATION -)FLOOD', MITIGATION /DISCHARGE LOCATION Legend 8" SD @ W16 STORM DRAINAGE PIPE Ill 0 EOo YD/CO/CB/CB 2/MH UNDERFIELD FLOOD MITIGATION STORAGE UNDERFIELD FLOOD MITIGATION STORAGE Instrument Number: 20260618000994 Document:COV Rec: S323.50 Page-7 of 21 Record Date:6/18/2026 4:23 PM King County, WA I I I I I I a UNDERFIELD' FLOOD MITIGATION STORAGE UNDERFIELD FLOOD — MITIGATION STORAGE SPILL CONTROL STRUCTURE I'I Legend 8" SD @ xx% STORM DRAINAGE PIPE ®• N ■COO YD/CO/CB/CB 2/MH Instrument Number: 20260618000994 Document:COV Rec: $323.50 Page-8 of 21 Record Date:6/18/2026 4:23 PM King County, WA Exhibit B - Operations and Maintenance Page 5 of Instrument Number: 20260618000994 Document:COV Rec: 5323.50 Page-9 of 21 Record Date:6/18/2026 4:23 PM King County, WA Htera Bioscape Minimum Requirements The minimum requirements for Filterra® Bioscape®Activation are as follows: 1. The purchaser must have sourced vegetation meeting the requirements outlined in the Filterra® Bioscape° Activation Package 2. A pre -construction meeting is required to discuss site requirements, logistics planning and activation FAQ and red flags. 3. The site landscaping must be fully stabilized, i.e. full landscaping installed and some grass cover (not just straw and seed) is required to reduce sediment transport. Construction debris and materials should be removed from surrounding area. 4. Final paving must be completed. Final paving ensures that paving materials will not enter and contaminate the Filterra® system during the paving process, and that the plant will receive runoff from the drainage area, assisting with plant survival for the Filterra® system. 5. All immediate upstream and downstream structures should be placed with piping into the system already installed for connection during activation. An Activation Checklist is included in the Filterra® Bioscape® Activation Package to ensure proper conditions are met for Activation. A charge of $1500.00 will be invoiced for each Supervised Activation visit requested by Customer where Contech determines that the site does not meet the conditions required for Activation. Filterra Plant Selection Overview A Plant List is available on the Contech website highlighting recommended plants for Filterra® Bioscape® systems in your area. Keep in mind that plants are subject to availability due to seasonality. Plants installed in the Filterra® Bioscape® system shall be container -grown plants (max 15 gallon) from nursery stock and will be immature in height and spread at Activation. It is the responsibility of the owner to provide adequate irrigation when necessary to the plant of the Filterra® Bioscape® system. The "Filterra® Bioscape® Activation Package" document is included as an appendix and discusses proper selection of the plants within Filterra® Bioscape® systems. Warranty Overview Refer to the Contech® Engineered Solutions LLC Stormwater Treatment System LIMITED WARRANTY for further information. The following conditions may void the Filterra® Bioscape® system's warranty and waive the manufacturer provided Final Site Assessment (if applicable): • Unauthorized activation or performance of any of the items listed in the activation overview without Contech supervision or input • Removal of any Filterra® system components • Failure to prevent construction related runoff from entering the Filterra® system • Failure to properly store and protect any Filterra® components (including media and underdrain stone) that are shipped separately to the site Routine Maintenance Guidelines With proper routine maintenance, the biofiltration media within the Filterra® Bioscape® system should last as Long as traditional bioretention media. Routine maintenance can be provided by certified maintenance providers listed on the Contech website. Training can also be provided to other stormwater maintenance or Landscape providers. Instrument Number: 20260618000994 Document:COV Rec: $323.50 Page-10 of 21 Record Date:6/18/2026 4:23 PM King County, WA Filtera Bioscape Why Maintain? All stormwater treatment systems require maintenance for effective operation. This necessity is often incorporated in your property's permitting process as a legally binding BMP maintenance agreement. Other reasons to maintain are: • Avoiding legal challenges from your jurisdiction's maintenance enforcement program. • Prolonging the expected lifespan of your Filterra® media. • Avoiding more costly media replacement. • Helping reduce pollutant loads leavingyour property. Simple maintenance of the Filterra® Bioscape® is required to continue effective pollutant removal from stormwater runoff before discharge into downstream waters. This procedure will also extend the longevity of the living biofilter system. The unit will recycle and accumulate pollutants within the biomass, but is also subjected to other materials entering the inlet. This may include trash, silt and leaves etc. which will be contained above the mulch layer. Too much silt may inhibit the Filterra's flow rate, which is the reason for site stabilization before activation. Regular replacement of the mulch stops accumulation of such sediment. When to Maintain? Maintenance visits are typically scheduled seasonally; the springvisit aims to clean up afterwinter loads including salts and sands while the fall visit helps the system by removing excessive leaf litter. It has been found that in regions which receive between 30-50 inches of annual rainfall, (2) two visits are generally recommended; In regions with less rainfall often only (1) one visit per annum is sufficient. Varying Land uses can affect maintenance frequency; e.g. some fast food restaurants require more frequent trash removal. Contributing drainage areas which are subject to new development wherein the recommended erosion and sediment control measures have not been implemented may require additional maintenance visits. Some sites may be subjected to extreme sediment or trash loads, requiring more frequent maintenance visits. This is the reason for detailed notes of maintenance actions per unit, helping the Manufacturer and Owner predict future maintenance frequencies, reflecting individual site conditions. Owners must promptly notify the maintenance provider of any damage to the plant(s), which constitute(s) an integral part of the bioretention technology. Exclusion of Services Clean up due to major contamination such as oils, chemicals, toxic spills, etc. will result in additional costs and are not included as part of the Final Site Assessment (if applicable). Should a major contamination event occur the Owner must block off the outlet pipe of the Filterra® (where the cleaned runoff drains to, such as drop inlet) and block off the throat of the Filterra®. The Supplier should be informed immediately. Instrument Number: 20260618000994 Document:COV Rec: $323.50 Page-11 of 21 Record Date:6/18/2026 4:23 PM King County, WA Filtera Bioscape Maintainenance Visit Summary Maintenance visits are typically scheduled seasonally; the spring visit aims to clean up after winter loads including salts and sands while the fall visit helps the system by removing excessive Leaf Litter. 1. Inspection of Filterra® Bioscape® and surrounding area 2. Removal of erosion control stones 3. Removal of debris, trash and mulch 4. Removal and disposal of erosion control sockfrom system perimeter (should be completed at 6 month or 12 month maintenance depending upon site characteristics). A new erosion control sock is no Longer needed after the first year. 5. Mulch replacement 6. Plant health evaluation and pruning or replacement as necessary 7. Clean area around Filterra® 8. Complete paperwork Plant Care for Filterra® Systems After Activation, the Contractor is responsible for proper care of the vegetation until the site is handed over to the Owner. After that, it is the Site Owner's responsibility to care for the vegetation. Contech recommends the following care for the plants: 1. To prevent transplant shock (especially if planting takes place in the hot season), it may be necessary to prune some of the foliage to compensate for reduced root uptake capacity. This is accomplished by pruning away some of the smaller secondary branches or a main scaffold branch if there are too many. Too much foliage relative to the root ball can dehydrate and damage the plant. 2. Plant staking may be required. 3. With all trees/shrubs, remove dead, diseased, crossed/rubbing, sharply crotched branches or branches growing excessively long or in wrong direction compared to majority of branches. 4. Contech recommends irrigation of the Filterra® Vegetation. The following guidance will help to ensure the vegetation is properly irrigated. Irrigation Recommendations: • Each Filterra® system must receive adequate irrigation to ensure survival of the living system during periods of drier weather. • Irrigation sources include rainfall runoff from downspouts and/or gutter flow, applied water through the tree grate or in some cases from an irrigation system with emitters installed during construction. • At Activation: Apply about one (cool climates) to two (warm climates) gallons of water per inch of trunk diameter over the root ball. • During Establishment: In common withal[ plants, each Filterra® plant will require more frequent watering during the establishment period. One inch of applied water per week for the first three months is recommended for cooler climates (2 to 3 inches for warmer climates). If the system is receiving rainfall runoff from the drainage area, then irrigation may not be needed. Inspection of the soil moisture content can be evaluated by gently brushing aside the mulch Layer and feeling the soil. Be sure to replace the mulch when the assessment is complete. Irrigate as needed**. • Established Plants: Established plants have fully developed root systems and can access the entire water column in the media. Therefore irrigation is less frequent but requires more applied waterwhen performed. For a mature system assume 3.5 inches of available water within the media matrix. Irrigation demand can be Instrument Number: 20260618000994 Document:COV Rec: S323.50 Page-12 of 21 Record Date:6/18/2026 4:23 PM King County, WA Filtera Bioscape estimated as 1" of irrigation demand per week. Therefore if dry periods exceed 3 weeks, irrigation may be required. ** Five gallons per square yard approximates 1 inch of water. Therefore for a 6' x 6 foot Filterra® approximately 20-60 gallons of applied water is needed. To ensure even distribution of water it needs to be evenly sprinkled over the entire surface of the filter bed, with special attention to make sure the root ball. is completely wetted. NOTE: if needed, measure the time it takes to fill a five gallon bucket to estimate the applied water flow rate. Then calculate the time needed to irrigate the Filterra®, For example is the flow rate of the sprinkler is 5 gallons/minute then it would take 12 minutes to irrigate a 6'x6' filter. Plant Replacement: In some cases, plants will require replacement. Please follow the procedures below to ensure a properly functioning Filterra® system. 1. Remove the existing plant, and Leave as much of the Filterra® media in place as possible. 2. Select a replacement per the Filterra® Bioscape® Activation Package. 3. Prior to removingthe plant from the container, ensure the soil moisture is sufficient to maintain the integrity of the root ball. If needed, pre -wet the container plant. 4. Cut away any roots which are growing out of the container drain holes. 5. Plant(s) should be carefully removed from the pot by gently pounding on the sides of the container with the fist to Loosen root ball. Then carefully slide out. Do not lift plant(s) by trunk as this can break roots and cause soil to fall off. Extract the root ball in a horizontal position and support it to prevent it from breaking apart. Alternatively, the pot can be cut away to minimize root ball disturbance. 6. Excavate a hole with a diameter 4" greater than the root ball, gently place the plant(s). 7. Plant the tree/shrub/grass with the top of the root ball 1" above surrounding media to allow for settling. 8. ALl plants should have the main stem centered in the tree grate (where applicable) upon completion of installation. 9. Reinstall or add mulch to a depth of 3" per Contech's mulch specifications for Filterra® systems. Instrument Number: 20260618000994 Document:COV Rec: $323.50 Page-13 of 21 Record Date:6/18/2026 4:23 PM King County, WA Filtera Bioscape Maintenance Visit Procedure Keep sufficient documentation of maintenance actions to predict location specific maintenance frequencies and needs. An example Maintenance Report is included in this manual. 1MInspection of Filterra and surrounding area • Record individual unit before maintenance with photograph (numbered). Record on Maintenance Report (see example in this document) the following: 20Removal of erosion control stones • Set aside erosion control stones for reuse after mulch has been replaced. • Dig out silt (if any) and mulch and remove trash &foreign items. 30Removal of debris, trash and mulch • After removal of mulch and debris, measure distance from the top of the Filterra engineered media soil to the top of the top slab. Compare the measured distance to the distance shown on the approved Contract Drawings for the system. Add Filterra media (not top soil or other) to bring media up as needed to distance indicated on drawings. Instrument Number: 20260618000994 Document:COV Rec: 5323.50 Page-14 of 21 Record Date:6/18/2026 4:23 PM King County, WA Ritera Bioscape 40Removal and Disposal of Erosion Control Sock • Remove and dispose of erosion control sock if site conditions allow (site should be fully stabilized). Erosion control sock is no Longer needed after 1-year post activation. 50Mulch Replacement • Add mulch evenly across entire system to a depth of three inches. 60Vegetation health evaluation and pruning • Examine the vegetation health and replace if necessary. Prune vegetation to encourage growth in the correct directions. Since Filterra® Bioscape® systems can contain many plants, only notation of individual damaged or unhealthy plants is necessary. Record on Maintenance Report the following: Vegetation Health Vegetation Damage Document damaged or unhealthy plants with photographs. 70Clean side slopes and area around the Filterra Bioscape system • Remove all trash and debris to be disposed of appropriately. 80Complete paperwork • Complete Maintenance Report. Some jurisdictions require submission of maintenance reports in accordance with approvals. It is the responsibility of the owner to comply with local regulations. Maintenance Tools, Safety Equipment and Supplies Ideal tools include: camera, bucket, shovel, broom, pruners, hoe/rake, and tape measure. Appropriate Personal Protective Equipment (PPE) should be used in accordance with local or company procedures. This may include impervious gloves where the type of trash is unknown, high visibility clothing, barricades when working in close proximity to traffic and safety hats, glasses, and shoes. Most visits require minor trash removal and a full replacement of mulch. Mulch should be a double shredded, hardwood variety. Instrument Number: 20260618000994 Document:COV Rec: S323.50 Page-15 of 21 Record Date:6/18/2026 4:23 PM King County, WA F'iltera Bioscape 9m Inspection and Maintenance 9M Isolator Row Plus Inspection Regular inspection and maintenance are essential to assure a properly functioning stormwater system. Inspection is easily accomplished through the manhole or optional inspection ports of an Isolator Row Plus. Please follow local and OSHA rules for a confined space entry. Inspection ports can allow inspection to be accomplished completely from the surface without the need for a con- fined space entry. Inspection ports provide visual access to the system with the use of a flashlight. A stadia rod may be inserted to determine the depth of sediment. If upon visual inspection it is found that sediment has accumulated to an average depth exceeding 3" (76 mm), cleanout is required. A StormTech Isolator Row Plus should initially be inspected immediately after completion of the site's construction. While every effort should be made to prevent sediment from entering the system during construction, it is during this time that excess amounts of sediments are most Likely to enter any stormwater system. Inspection and maintenance, if necessary, should be performed prior to passing responsibility over to the site's owner. Once in normal service, a StormTech Isolator Row Plus should be inspected bi-annually until an understanding of the sites characteristics is developed. The site's maintenance manager can then revise the inspection schedule based on experience or local requirements. 9LM Isolator Row Plus Maintenance JetVac maintenance is recommended if sediment has been collected to an average depth of 3" (76 mm) inside the Isolator Row Plus. More frequent maintenance may be required to maintain minimum flow rates through the Isolator Row Plus. The JetVac process utilizes a high pressure water nozzle to propel itself down the Isolator Row Plus while scouring and suspending sediments. As the nozzle is retrieved, a wave of suspended sediments is flushed back into the manhole for vacuuming. Most sewer and pipe maintenance companies have vacuum/ JetVac combi- nation vehicles. Fixed nozzles designed for culverts or large diameter pipe cleaning are preferable. Rear facingjets with an effective spread of at least 45" (1143 mm) are best. StormTech recommends a maximum nozzle pressure of 2000 psi be utilized during cleaning. The JetVac process shall only be performed on StormTech Rows that have ADS Plus fabric over the foundation stone. A Ramp (flared end ramp) is attached to the inlet pipe on the inside of the chamber end cap to provide a smooth transition from pipe invert to fabric bottom. It is configured to improve chamber function performance over time by distributing sediment and debris that would otherwise collect at the inlet. It also serves to improve the fluid and solid flow back into the inlet pipe during maintenance and cleaning, and to guide cleaning and inspection equipment back into the inlet pipe when complete. FlamFlared End Ram A typical JetVac truck (this is not a p ( p) StormTech product.) Examples of culvert cleaning nozzles appropriate for Isolator Row Plus maintenance. (These are not StormTech products). Instrument Number: 20260618000994 Document:COV Rec: $323.50 Page-16 of 21 Record Date:6/18/2026 4:23 PM King County, WA Underfield DrainageSystem The field systems are self -filtering, as such there is not any sediment that gets into the pipes that would require cleaning. Instrument Number: 20260618000994 Document:COV Rec: S323.50 Page-17 of 21 Record Date:6/18/2026 4:23 PM King County, WA APPENDIX AMAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON -SITE BMPS t RESULTS EXPECTED WHEN MAINTENANCE DEFECT OR CONDITION WHEN MAINTENANCE IS MAINTENANCE IS COMPONENT PROBLEM NEEDED PERFORMED Structure Sediment Sediment exceeds 60% of the depth from Sump of catch basin contains no accumulation the bottom of the catch basin to the invert sediment. of the lowest pipe into or out of the catch basin or is within 6 inches of the invert 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 which is located immediately in front of the potentially blocking entrance to catch basin opening or is blocking catch basin. capacity of the catch basin by more than 10%. Trash or debris in the catch basin that No trash or debris in the catch exceeds'/3 the depth from the bottom of basin to invert the lowest pipe into or out basin. of the basin. Dead animals or vegetation that could No dead animals or vegetation generate odors that could cause present within catch basin. complaints or dangerous gases (e.g., methane). Deposits of garbage exceeding 1 cubic No condition present which would foot in volume. attract or support the breeding of insects or rodents. Damage to frame Corner 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 inches or cracks wider than '/4 inch. cracks. 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 bottom 3 feet, any evidence of soil particles structurally 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 inch wide 1 foot at the joint of any inlet/outlet pipe or at the joint of inlet/outlet 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 misalignment or has rotated more than 2 inches out of design standards. alignment. Damaged pipe joints Cracks wider than'% -inch at the joint of No cracks more than'% -inch wide the inlet/outlet pipes or any evidence of at the joint of inlet/outlet pipes. soil entering the catch basin at the joint of the inlet/outlet pipes. 6/22/2022 2022 City of Renton Surface Water Design Manual A-12 Instrument Number: 20260618000994 Document:COV Rec: S323.50 Page-18 of 21 Record Date:6/18/2026 4:23 PM King County, WA APPENDIX AMAINTENANCE REQUIREMENTS FOR STORMWATER FACILTTIES AND ON -SITE BMPS RESULTS EXPECTED WHEN MAINTENANCE DEFECT OR CONDITION WHEN MAINTENANCE IS MAINTENANCE IS COMPONENT PROBLEM NEEDED PERFORMED Contaminants and Any evidence of contaminants or pollution Materials removed and disposed pollution such as oil, gasoline, concrete slurries or of according to applicable paint. regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Inlet/Outlet Pipe Sediment Sediment filling 20% or more of the pipe. Inlet/outlet pipes clear of accumulation sediment. Trash and debris Trash and debris accumulated in No trash or debris in pipes. inlet/outlet pipes (includes floatables and non-floatables). Inlet/Outlet Pipe Damaged inlet/outlet Cracks wider than ''Y inch at the joint of No cracks more than'/ -inch wide (cont.) pipe the inlet/outlet pipes or any evidence of at the joint of the inlet/outlet pipe. soil entering at the joints of the inlet/outlet pipes. Metal Grates Unsafe grate opening Grate with opening wider than 7/8 inch. Grate opening meets design (Catch Basins) standards. Trash and debris Trash and debris that is blocking more Grate free of trash and debris. than 20% of grate surface. Damaged or missing Grate missing or broken member(s) of the Grate is in place and meets grate grate. Any open structure requires design standards. urgent maintenance. Manhole Cover/Lid Cover/lid not in place Cover/lid is missing or only partially in Cover/lid protects opening to place. Any open structure requires structure. urgent maintenance. Locking mechanism Mechanism cannot be opened by one Mechanism opens with proper not working maintenance person with proper tools. tools. Bolts cannot be seated. Self-locking cover/lid does not work. Cover/lid difficult to One maintenance person cannot remove Cover/lid can be removed and remove cover/lid after applying 80 lbs. of lift. reinstalled by one maintenance person. 2022 City of Renton Surface Water Design Manual 6/22/2022 A-13 Instrument Number: 20260618000994 Document:COV Rec: S323.50 Page-19 of 21 Record Date:6/18/2026 4:23 PM King County, WA APPENDIX AMAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES AND ON -SITE BMPS RESULTS EXPECTED MAINTENANCE DEFECT OR CONDITIONS WHEN WHEN MAINTENANCE IS COMPONENT PROBLEM MAINTENANCE IS NEEDED PERFORMED Pipes Sediment & 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. growth in pipe movement of water through pipes. Contaminants and Any evidence of contaminants or pollution Materials removed and disposed pollution such as oil, gasoline, concrete slurries or of according to applicable paint. regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Damage to protective Protective coating is damaged; rust or Pipe repaired or replaced. coating or corrosion corrosion is weakening the structural integrity 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 1,000 square feet of ditch and slopes. ditches. Sediment Accumulated sediment that exceeds 20% Ditch cleaned/flushed of all accumulation of the design depth. sediment and debris so that it matches design. Noxious weeds Any noxious or nuisance vegetation which Noxious and nuisance may constitute a hazard to City personnel vegetation removed according to or the public. applicable regulations. No 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 pollution such as oil, gasoline, concrete slurries or of according to applicable paint. regulations. Source 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 growth water through ditches. 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 place or missing (If native soil area 5 square feet or more, any standards. applicable) exposed native soil. 6/22/2022 2022 City of Renton Surface Water Design Manual A-14 Instrument Number: 20260618000994 Document:COV Rec: S323.50 Page-20 of 21 Record Date:6/18/2026 4:23 PM King County, WA APPENDIX AMAINTENANCE REQUIREMENTS FOR STORMWATER FACILTTIES AND ON -SITE BMPS MAINTENANCE DEFECT OR COMPONENT PROBLEM Site Trash and debris Sediment accumulation Structure Cracked, broken, or loose pipe or structure Bars I Incorrect bar spacing CONDITION WHEN MAINTENANCE IS NEEDED Trash or debris plugging more than 20% of the area of the barrier. Sediment accumulation of greater than 20% of the area of the barrier Structure which bars attached to is damaged — pipe is loose or cracked or concrete structure is cracked, broken, or loose. Bar spacing exceeds 6 inches Damaged or missing Bars are bent out of shape more than 3 bars inches. Bars are missing or entire barrier missing Bars are loose and rust is causing 50% deterioration to any part of barrier. RESULTS EXPECTED WHEN MAINTENANCE IS PERFORMED. Barrier clear to receive capacity flow. Barrier clear to receive capacity flow. Structure barrier attached to is sound. Bars have at most 6 inches spacing. Bars in place with no bends more than % inch. Bars in place according to design. Repair or replace barrier to design standards. 2022 City of Renton Surface Water Design Manual 6/22/2022 A-15 Instrument Number: 20260618000994 Document:COV Rec: S323.50 Page-21 of 21 Record Date:6/18/2026 4:23 PM King County, WA Exhibit C - Legal Description Legal Description NEW LOTS 4, 5, AND 6 OF CITY OF RENTON LLA NO. LUA23000366, REC. NO. 20240301900006, KING COUNTY, WASHINGTON. Page 6 of