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Home My WebLink About2022 - Declaration of Covenant for Inspection and Maintenance of Stormwater Facilities and BMPS - Porter Investment Properties / City of Tukwila - 20220328000815Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -1 of 36 Record Date:3/28/2022 3:15 PM Electronically Recorded King County, WA After Recording Return to: City Clerk City of Tukwila 6200 Southcenter Boulevard Tukwila, WA 98188 DOCUMENT TITLE: Declaration of Covenant for Inspection and Maintenance of Stormwater Facilities and BMPS REFERENCE NUMBER(S) OF RELATED DOCUMENTS: Additional reference numbers at page 2 of document. GRANTOR: PORTER INVESTMENT PROPERTIES, LLC, GRANTEE: City of Tukwila, a Washington Municipal Corporation ABBREVIATED LEGAL DESCRIPTION: PTN OF THE SE 1/4, OF THE SW 1/4 OF SEC. 14, TWP. 23N., RGE 4 EAST, W.M. CITY OF TUKWILA, KING COUNTY, STATE OF WASHINGTON Full legal on page 5 of document. KING COUNTY TAX PARCEL NUMBER: 336590-0830, -0845, -0850, -0855 Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -2 of 36 Record Date:3/28/2022 3:15 PM King County, WA DECLARATION OF COVENANT FOR INSPECTION AND MAINTENANCE OF Sl'ORMWATER FACILITIES AND BMPS 1. Parties 1.1 This Covenant for Inspection and Mailgenance of Stormwater Facilities and Best Management Practices ("Covenant") is made by and 1 Grantor, and the City of Tukwila, a Washington Municipal Corporation, as Grantee. GT/Aeon-and Gane (also denoted as City herein) are each a Party and collectively the Parties to this Agreement. 2. Recitals PUBLIC VVORKS CONSTRUCTION PERMIT - PW20-0070, ISSUED 12-18-20 DEVELOPMENT PERMIT - D21-0044, ISSUED 8-20-21 2.1 Grantor applied to City for issuance of a [type ofpermit] on , 20_. 2.2 Pursuant to TMC 14.30.060, application for and issuance of such permit requires the property owner to enter into this Covenant. 2.3 The subject of the Covenant is the real property located in King County, Washington, bearing King County Tax Parcel No. and legally described in the attached Exhibit A incorporated herein ("Property"). 336590-0830, -0845, -0850, -0855 2.4 The City approved the applications which consist of the following documents, attached and incorporated herein: 20-0070 AND 021-00414 2.4.1 City issued Permit No. , Exhibit B. 2.4.2 Stormwater Facility/BMP Site Plan, Exhibit C. 2.4.3 Operations & Maintenance Plan including schedule, Exhibit D. 3. Terms of Agreement NOW THEREFORE, in consideration of the foregoing recitals and other good and valuable consideration including approval and issuance of City of Tukwila Permit [number and date], the sufficiency and receipt of which are acknowledged, Grantor hereby irrevocably covenants as follows: 3.1 Covenant . The foregoing Recitals and references to documents are incorporated as material terms of this 3.2 The Grantor(s) for itself and its successors in interest having any ownership interest in the Property (collectively Owners) shall at their sole cost and expense retain, uphold, operate, maintain, and repair the stormwater facilities and best management practices ("BMPs") located on the Property pursuant to the schedule within the Operations & Maintenance Plan. 3.3 The obligations required under Section 3.2 above shall be taken consistent the following: 3.3.1 The City shall have the right of ingress and egress over those portions of the Property necessary to perform inspections of the stormwater facilities and BMPs and conduct other activities specified in this Declaration of Covenant and in accordance with Tukwila Municipal Code ("TMC") 14.30.80. This right of ingress and egress, right to inspect, and right to perform required maintenance or repair shall be as provided for in subsection 3.3.2 below. City of Tukwila Page 1 Stormwater Maintenance Declaration of Covenant Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -3 of 36 Record Date:3/28/2022 3:15 PM King County, WA 3.3.2 If the City determines that maintenance or repair work is required to be done to any of the stormwater facilities or BMPs, the Director of Public Works or designee (the "Director") shall give notice of the specific maintenance and/or repair work required pursuant to TMC 14.30.080. The Director shall also set a reasonable time in which such work is to be completed by the Owner. If the above required maintenance or repair is not completed within the time set by the Director, the City may perform the required maintenance or repair, and is hereby granted access to the Property for such purposes. Written notice will be mailed to the Owner 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 Director, there exists an imminent or present danger, the seven (7) day notice period will be waived and maintenance and/or repair work will begin immediately. 3.4 If at any time the City reasonably determines that a stormwater facility or BMP on the Property presents an imminent hazard, as identified by TMC 14.30.080 and herein incorporated by reference, the Director or equivalent municipal successor's official may take measures specified therein. 3.5 The Owner shall assume all responsibility for the cost of any maintenance or repair work completed by the City as described in Covenant. 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 current legal rate as liquidated damages. All such costs and expense shall constitute a lien against the Property, 3.6 The Owners shall obtain a Type C Public Works permit from the City prior to filling, piping, cutting, or removing vegetation (except in routine landscape maintenance such as replacement of plants and pretreatment mulch) in open vegetated stormwater facilities (such as swales, channels, ditches, ponds, etc.), or performing any alterations or modifications to the stormwater facilities and BMPs referenced in this Covenant. Prior to the final approval and issuance of the new permit, a new Covenant with updated exhibits reflecting the changes to the stormwater facilities shall be recorded at the Owner's sole cost, and a copy of the new recorded Declaration of Covenant provided to the City. 3.7 Any notice or consent required to be given or otherwise provided for by the provisions of this Declaration of Covenant shall be effective upon personal delivery, or three (3) days after mailing by Certified Mail, return receipt requested, to the address listed below for that party: To Grantee: City Clerk City of Tukwila 6200 Southcenter Blvd. Tukwila, WA 98188 To Grantor: i1/4S Lies 14,77,4 A 3.8 With regard to the matters addressed herein, this Covenant constitutes the entire agreement between the parties, and supersedes all prior discussions, negotiations, and all agreements whatsoever whether oral or written. This Covenant shall be governed by the laws of the State of Washington. Any suit to enforce or relating to this Covenant shall only be filed in King County Superior Court, King County, Washington, and the Parties consent to the jurisdiction thereof In the event of any legal action by either Party relating to this Covenant, the Parties shall pay their own costs or fees. City of Tukwila Stormwater Maintenance Declaration of Covenant Page 2 Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -4 of 36 Record Date:3/28/2022 3:15 PM King County, WA 3.9 This Covenant is intended to protect the value and desirability of the real property described in Exhibit A, promote the efficient and effective management of stormwater drainage, and shall inure to the benefit of all the citizens of the City and its municipal successors and assigns. References herein to the TMC shall include subsequent amendments to such statutes and all successor statutes. 3.10 This Covenant shall run with the land and shall be binding upon the Owners as defined in Section 3.2 above. 3.11 This Covenant may be amended or terminated only with the advance express written consent of the City as determined pursuant to its discretion. EXECUTED AND EFFECTIVE as of the date last signed below. FOR GRANTOR: Name Title DATE: 3 FOR GRANTEE: City of Tukwila Hari Ponnekanti Public Works Director DATE: L'S NOTARY BLOCKS APPEAR ON FOLLOWING PAGE City of Tukwila Stormwater Maintenance Declaration of Covenant Page 3 Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -5 of 36 Record Date:3/28/2022 3:15 PM King County, WA } STATE OF WASHINGTON COUNTY OF KING ss. 1 certify that I know or have satisfactory evidence that rt.;.(Jl ) f '17t is the person who appeared before me, and said person acknowledged that s/he signed this instrument on behalf of theC'of.-.'te, "T'n ef-,1 rne and acknowledged it to be her/his free and voluntary act for the uses and purposes mentioned in this iljf7P(-1;1' instrument. GIVEN UNDER MY HAND AND OFFICIAL SEAL this rn , 2021: 40,-;70 BETH KIMBALL Notary Public State of Washington Commission # 206976 omm. Expires Apr 18, 2023 } STATE OF WASHINGTON COUNTY OF KING Lit r0 day of Printed Name i" N4. NOTARY PUBLIC in and for the residing at My Commission Expires 9 1 ss. 'eY1 4n0 « State of Washington 17(0' A On this day personally appeared before me ikfl , to me known to be the ) LL)ocKs r of the CITY OF TUKWILA, a municipal corporation and noncharter code city with a council -mayor form of government organized pursuant to RCW Title 35A, that executed the foregoing instrument, and acknowledged such instrument to be her free and voluntary act and deed of said city for the uses and purposes therein mentioned, and on oath stated that s/he was duly authorized to execute such instrument. GIVEN UNDER MY HAND AND OFFICIAL SEAL this ,;';2 day of 202 City of Tukwila Stormwater Maintenance Declaration of Covenant /2 0 Printed a hit ,( r -7-e il L-Ocrek NOTARY PUBLIC in and for the State of Washington, residing at I_K.L.), V, My Commission Expires OS /,C Page 4 Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -6 of 36 Record Date:3/28/2022 3:15 PM King County, WA EXHIBIT A LEGAL DESCRIPTION OF PROPERTY PTN OF THE SE 1/4, OF THE SW 1/4 OF SEC. 14, TWP. 23N., RGE 4 EAST, W.M. CITY OF TUKWILA, KING COUNTY, STATE OF WASHINGTON TAX PARCEL NUMBER: 336590 -0830: PLAT BLOCK 8, PLAT LOT 14-15-16 -0845: PLAT BLOCK 8, PLAT LOT 17 -0850: PLAT BLOCK 8, PLAT LOT 18 -0855: PLAT BLOCK 8, PLAT LOT 19, 20 ZONING DESIGNATION: REGIONAL COMMERCIAL MIXED USED (RCM) GENERAL PLAN DESIGNATION: COMMERCIAL LOT AREA: +-73,500SF (+-1.687 ACRES) City of Tukwila Stonnwater Maintenance Declaration of Covenant Page 5 Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -7 of 36 Record Date:3/28/2022 3:15 PM King County, WA EXHIBIT B Permit [attached] EXHIBIT B INCLUSIONS: PW20-0070 D21.0044 PG 10-15 City of Tukwila Storinwater Maintenance Declaration of Covenant Page 6 Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -8 of 36 Record Date:3/28/2022 3:15 PM King County, WA EXHIBIT C Stormwater Facility/I3MP Site Plan [attached] EXHIBIT C INCLUSIONS: STORMWATER SITE PLAN PG 16 City of Tukwila Stormwater Maintenance Declaration of Covenant Page 7 Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -9 of 36 Record Date:3/28/2022 3:15 PM King County, WA EXI11BIT D Operations & Maintenance Plan with Schedule [attached] EXHIBIT D INCLUSIONS: PG 17-35 } City of Tukwila Storrnwater M aintenance Declaration of Covenant. Page 8 Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -1.0 of 36 Record Date:3/28/2022 3:15 PM King County, WA EXHIBIT B - PERMIT PW20-0070 City of Tukwila Department of Public Works 6300 Southcenter Boulevard, Suite 11100 Tukwila, Washington 98188 Phone: 206-433-0179 Inspection Scheduling: https://tukw•egov.aspgov,com/BP/Indox.html Web site: http://wwW.Tukwll8WA,Rav PUBLIC WORKS CONSTRUCTION PERMIT Parcel No: 3365900845 Permit Number: PW20.0070 Address: 14027 INTERURBAN AVE 5 Issue Date: 12/18/2020 Permit Expires On: 6/16(2021 Project Name: GREENWOOD HEATING Owner: Name; W 5 CAPITAL VENTURES LLC Address: 2A600 AM 8A U M BLVD SW , BU RI EN, WA,98166 Contact Person: Name: COURTNEY MCLEAN Address: 602112111515TE 201, TACOMA, WA, 98424 Phone: (253)922.-9037 Contractor: Name: DONOVAN BROTHERS INC Phone: (253)936.-7777 Address: PO BOX 818, AUBURN, WA, 98071- 0818 License No; DONOVB109405 Expiration Date: 3/6/2021 DESCRIPTION OF WORN: CONSTRUCTION OF CIVIL IMPROVEMENTS FOR A NEW GREENWOOD HEATING BUILDING, INCLUDING GRADING, PAVEMENT, STORM DRAINAGE, WATER, AND SEWER SERVICES. NEW 1" WATER SERVICE TAPPED OFF THE MAIN, 1" DOMESTIC WM & RPPA, NEW FIRE LINE LOOP TAPPED OFF THE MAIN, (DDCVA INSIDE THE BLDG), NEW DCVA TO SERVE EXISTING 1" WM FOR IRRIGATION, 6" SANITARY SIDE SEWER, STORM DRAINAGE, ACCESS. LAND ALTERING, Fees Collected: $10,147,10 Electrical Service Provided by: Puget Sound Energy Water District: Tukwila Sower District; Tukwila Public Works ActIvIUes: Chann ellzntlan/Striping: Curb Cut/Access/Sidewalk: 1 Fire Loop Hydrant: 1 Flood Control Zane: Hauling/Oversize Load: Land Altering: Volumes: Cut: 40 FIII: 500 Landscape Irrigation: 1 SanItarySldeSewer: Number: 1 Sewer Main Extension: Storm Dralnage: 1 Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -1.1 of 36 Record Date:3/28/2022 3:15 PM King County, WA Street Use: Water Main Extension: Water Meter: EXHIBIT B - PERMIT PW20-0070 1 Yes All provisions of law and ordinances governing this work will be complied with, whether specified herein or not The granting of this permit does not presume to give authority to violate or cancel the provisions of any other state or local laws regulating construction or the performance of work. This permit shall become null and veld if the work Is not commenced within 180 days for the date of lssuanca, or If the work Is suspended or abandoned for a period of 180 days from the last Inspection, PERMIT CONDITIONS: 17: An exterior electrically supervised post Indicator valve (PIV) must be installed upstream of the fire department connection (FOC). 1: All valves controlling the water supply for automatic sprinkler systems and waterflow switches on all sprinkler systems shall be electrically supervised, 2: All piping and attached appurtenances subjected to system working pressure shall be hydrostatically tested at 200 psi (13.8 bar) or 50 psi (3.5 bar) In excess of the system working pressure, whichever Is greater, and shall maintain that pressure at /- 5 psi (0.35 bar) for 2 hours. Contact the Public Works Department at 206- 433.0179 to make an appointment. (NFPA 24, sec. 10.10.2.2.1) 3: The fire department connection (FDC) shall have a downward angle bend between 22,5 and 45 degrees, with a 5 -inch Storz fitting(s) and Knox FDC locking Storz cap. (qty Ordinance 82436) 4: The height of the FDC shall be 36 to 48 Inches above grade. 5: Fire department connections (FDC's) shall be oriented In the direction of fire apparatus access, have a 4 foot clear space In front and to the sides of the connection, be appropriately signed, have the building address served by the FDC stenciled vertically in 3 -Inch high white numbers on a "safety red" bacfq;round directly beneath the hose connection facing the direction of vehicular access, and protected from potential vehicular damage. 6' Post Indicator Valves (WV's) shall have the building address served by the PIV stenciled vertically in 3•Inch high white numbers on a "safety red" background, facing the direction of vehicular access. (City Ordinance 82436) 7: All new fire alarm systems or modifications to existing systems shall have the written approval of The Tukwila Fire Prevention Bureau. No work shall commence until a fire department permit has been obtained, (City Ordinance 82437) (IFC 901,2) 8: All required hydrants and surface access roads shall be Installed and made serviceable prior to and during the time of construction. (IFC 501.4) 9: The center of the hose outlet shall be not less then 18 In. (457 mm) above final grade or, where located In a hose house, 12 In. (306 mm) above the floor. 10: Fire hydrants shall conform to American Water Works Association specifications C-502-54; It shall be compression type, equipped with two 21/2" N.S.T. hose ports and one 5" Storz pumper discharge port with Knox locking cap, and shall have a 1 1/4" Pentagon open -lift operating not. (City Ordinance /12052) 11: Fire hydrants shall be oriented In the direction of fire apparatus access, Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -1.2 of 36 Record Date:3/28/2022 3:15 PM King County, WA EXHIBIT B - PERMIT PW20-0070 12: Hydrants shall not be closer than 4 feat to any fixed object (e.g., fences, parking, building, etc.), with the exception of hydrant guard posts. Guard Posts shall be Installed around hydrants not protected by curls, so as to help prevent motor vehicles from contacting the hydrant. The guard posts shall be either steel plpe (minimum 4" dlstance) filled with concrete or concrete (minimum 8" diameter). Posts shall be 3 feet from the center of the hydrant and shall not be In direct Ilne with any discharge ports. Posts shall be 6 feat long; 3-31/2 feet shall be burled. Painted finish shall be the same color as for the applicable hydrants. The 4 - foot circumference around the hydrant will be a level surface, (City 0rdlnance 02052) 13: When subject to vehicular damage, protective guard posts or curbs are required around all gas meters, electrical transformers, sprinkler valves and hydrants. Posts and curbs are to be painted yellow, (City Ordinance 82052) 14: Private hydrants shall be all yellow. Hydrant color Is to be "Rustoleum" 0659 Yellow Gloss or Farwest OX - 3472 Case Yellow. 16; 43400 FIRE INSPECTIONS REQUIRED 15; Any overlooked hazardous condition and/or violation of the adopted Fire or Bullding Codes does not imply approval of such condition or violation. 18; "*PUBLIC WORKS PERMIT CONDITIONS*" 19; Cab to schedule mandatory pre -construction meeting with the Public Works Inspector, (206)438-9350, 20: Schedule and attend a Preconstructlon Meeting with the Public Works Department prior to start of work under this permit. To schedule, call Public Works at (206) 438-9350. 21: The applicant or contractor must notify the Public Works inspector at (206) 438-9350 upon commencement and completion of work et least 24 hours In advance. All inspection requests for utility work must also be made 24 hours In advance. 22; Prior to construction, all utilities In the vicinity shall be field located, NOTE: For City of Tukwila utility locates, call 811 or 1-800-424-5555. 23: Permit Is valid between the weekday hours of 7:00 a.m. and 5:00 p,m, only. Coordinate with the Public Works Inspector for any work after 5:00 p.m. and weekends. 24: No work under this permit during weekend hours without prior approval by Public Works. Coordinate with the Public Works Inspector, 25; Work affecting traffic flows shall be closely coordinated with the Public Works Inspector. Traffic Control Plans shall be submitted to the inspector for prior approval. 26: The City of Tukwila has an undergrounding ordinance requiring the power, telecommunications, and cable service lines be underground from the point of connection on the pole to the house. 27; Flagging, elgn(ng and coning shall be In accordance with MUTCD for Traffic Control, Contractor shall provide certified flagmen for traffic control. Sweep or otherwise clean streets to the satisfaction of Public Works each night around hauling route (No flushing allowed). Notify Public Works Inspector before 12;00 Noon on Friday preceding any weekend work, 28: Any material spilled onto any street shall be cleaned up Immediately. 29: Hauling 6 loaded vehicles per hour/8 hours a day for 2 or more consecutive days er hauling hazardous waste shall require application for a Hauling Permit prior to any associated activity. 30: Temporary erosion control measures shall be Implemented as the first order of business to prevent sedimentation off-site or Into existing drainage facilities. 31: The site shall have permanent erosion control measures in place as soon as passible after final grading has been completed and prior to the Final inspection. 32: The Land Altering Permit Fee Is based upon an estimated - cubic yards of cut and _ cubic yards of fill. If the final quantity exceeds this amount, the developer shall be required to recalculate the final quantity and pay the difference In permit Fee prior to the Final Inspettton. 33; From October 1 through Apr1130, cover any slopes and stockpiles that are 311;1V or steeper and have a vertical rise of 10 feet or more and will be unworked for greater than 12 hours. During this time period, cover or mulch other disturbed areas, If they will be unworked more than 2 days. Covered material must be stockpiled on site at the beginning of this period, Inspect end maintain this stabilization weekly and Immediately before, during and following storms, Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -1.3 of 36 Record Date:3/28/2022 3:15 PM King County, WA EXHIBIT B - PERMIT PW20-0070 34: From May 1 throughSeptember 30, Inspect and maintain temporary erosion prevention and sediment at least monthly. All disturbed areas of the site shall be permanently stabilized prior to final construction approval. 35; All private storm drain pipe shalt be either concrete or reinforced ADS pipe, Treated corrugated metal pipe may be used for detention facilities. 36; The property owner Is responsible for the maintenance of Its storm drainage system and, for this purpose, shall have a maintenance plan In place and the responsibility for maintenance assigned prior to Public Works final 37: A double detector check valve assembly is required for the fire lines. 38: The applicant shall Install a Washington State Health Department approved backflow device between the fire hydrant and the temporary water meter. 39: The water meter box shall be located within City right-of-way at the property line or a recorded utility easement. 40: All double check valve assemblies shall be approved by the State Department of Health. 41: It shall be verified In writing to the Public Works Inspector that the fire loop system for the building contains a State Department of Health approved double check detector valve assembly. This shall be done prior to the Final Inspection. 42: Prior to backfill of pipe and final sl3n off, provide as -constructed plan sheet showing dimensions In relation to property line and house. 43: It shall be verified In writing to the Public Works Inspector that the landscape Irrigation system contains a State Department of Health approved double check valve assembly, This shall be done prior to the Final Inspection. 44: Driveway shall comply with Clty commercial standards. Driveway width shall be a Z5' minimum and 35' maximum. Slope shall be a maximum of 15%. Turning radii shall be a minimum of 10'. 45: Geotechnical Engineer/Solis Engineer shall provide certification of trench backfill to the Public Works Inspector. Trench backfill shall be per 2012 WSDOT Standard Specifications for Road, Bridge, and Municipal Construction. (No native backfill unless approved by the City Engineer.) 46: Maintain emergency, pedestrian, and vehicular access to buildings, trails and transit at all times, 47: Construction equipment shall be kept off of existing 5 foot wide pedestrian path, es much as possible, to avoid damage of asphalt 48: Pavement mitigation fees may apply to this permit, Amount estimated to be xxx sq. ft . x $xx,xx per sq. ft. $x,xxx.xx. Final measurement to be made In the field by the Public Works Inspector prior to Public Works Final. 49; A bond or cash equivalent In the amount of 150% x cost of construction within the City right-of-way made out to the Clty of Tukwila For possible property damages caused by activltes, 50: A copy of the Certificate of insurance Coverage (minimum of $2,000,000 naming the City of Tukwila as additionally Insured). PERMIT INSPECTIONS REQUIRED Permit Inspection Line; (206) 438-9350 51.70 BACKFLOW - IRR 5190 BACKFLOW - WATER 5000 CURB ACCESS SDW 5200 EROSION MEASURES 5210 EROSION MEASURES FNL 5020 FIRE LOOP HYDRANT 5040 LAND ALTERING 5060 LANDSCAPE IRRIGATION 5230 PAVING AND RESTORE 1600 PUBLIC WORKS FINAL Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -1.4 of 36 Record Date:3/28/2022 3:15 PM King County, WA EXHIBIT B - PERMIT PW20-0070 5160 PUBLIC WORKS PRE -CON 5070 SANITARY SIDE SEWER S090 STORM DRAINAGE 5100 STREET USE 5130 WATER METER • PERM 5130 WATER METER - PERM Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -15 of 36 Record Date:3/28/2022 3:15 PM King County, WA EXHIBIT B - PERMIT D21-0044 - City of Tukwila Department of Community Development 00 Southcenter Boulevard, Suite #I100 Tukwila, Washington 981 I Phone: 206-431-3570 Inspection Scheduling: https://tukw.egov.aspgov.com/BP/index.html Fire Inspection Request Line: 206.575-4407 Web site: fitto://www.TukwIlaWA.env DEVELOPMENT PERMIT Parcel No; 3365900830 Permit Number: D21-0044 Address: 14027 INTERURBAN AVE 5 Issue Date; 8/20/2021 Permit Expires On: 2/16/2022 Project Name: Greenwood Heating Owner: Name: WS CAPITAL VENTURES LLC Address: 14500 AMBAUM BLVD SW, BURIEN, WA, 98168 Contact Person: Name: Melena Stewart Phone: (253) 922.9037 Address: 0021 12th Street E, Suite 201, Tacoma, WA, 98405 Contractor: Name: DONOVAN BROTHERS INC Phone: (253) 939-7777 Address: PO BOK 818, AUBURN, WA, 98071- 0818 License No: DONOV8109405 Expiration Date: 3/6/2023 Lender: Name: Erica Erdozaln, Columbia Bank Addre-ss: 1810 Everett Avenue Everett WA 98201 DESCRIPTION OF WORK: Construction of an underground stormwater detention vault. PUBLIC WORKS ACTIVITIES INCLUDE EROSION CONTROL AND LAND ALTERING ASSOCIATED WITH UG VAULT PLACEM ENT. Project Valuation: $150,000.00 Fees Collected: $4,966.00 Type of Fire Protection: Sprinklers; NO Fire Alarm: NO Type of Construction: VB Electrical Service Provided by: Tukwila Occupancy per IBC: U Water District; Tukwila Sewer District: Tukwila Current Codes adopted by the City of Tukwila; Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -16 of 36 Record Date:3/28/2022 3:15 PM King County, WA EXHIBIT C STORMWATER SITE PLAN PROPERTY LINE 6TORMWATERDE17-NTION AULT (—x —x—x—x Hil iza _c uJ a.) 0 r, -)I •ct. u < o 0< 0 a) NI o CC1 -C X • csj csj 0 0 Cs4 0jo c71 E a_ ay LT: fE SCALE HORIZONTAL 1 "=60' BARGHAUSEN CONSULTING ENGINEERS, INC. 18215 72ND AVENUE SOUTH KENT, WA 98032 425.251.6222 BARGHAUSEN,COM For: GREENWOOD HEATING 14027 S INTERURBAN AVE JOB NUMBER 21043 Title: EXHIBIT C STORMWATER SITE PLAN SHEET of 1 DESIGNED JRM ipRAWN JRM 'CHECKED _EN_ IAPPROVED_DEB__. JDATE 3/1 / 2022 .# Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -17 of 36 Record Date:3/28/2022 3:15 PM King County, WA EXHIBIT "D" Stormwater Pollution Prevention Plan for Greenwood Heating Permit No. PW20-0070 Site Address The site address is 14027 Interurban Ave S, Tukwila, WA 98168. Assessor's Tax Parcel No. 336590-0830, -0845, -0850, -0855 Plan Goal The goal of the plan is to treat all on-site runoff for water quality by directing flows to a modular wetland and through a storm detention vault prior to discharge to the public system along Interurban Ave S. Preventative BMP's The catch basins shall have stenciled next to them "DUMP NO WASTE -DRAINS TO STREAM". Activity that involves pollutants shall be done under a covered area. The private driveways and parking lot shall be cleaned and swept as necessary to remove debris. Inspection Inspect the stormwater system and clean out catch basins at least twice a year, especially after periods of heavy runoff. Maintenance records must be kept for five (5) years and available for City Inspector review. The modular wetland shall be maintained as recommended by the manufacturer. Person of Responsibility Name: Address: Emergency Contact Person of Responsibility, Date: Engineer Preparing Plan Name Address Plan and/or Information Updates Porter Investment Properties, L.L.0 825 S. Stacy St., Seattle, WA 98134 Telephone No. 206.971.0306 Michael Porter, 12/16/2021 Zayin Wall, P.E Barghausen Consulting Engineers, Inc. 18215 72nd Avenue South Kent, WA 98032 The City of Tukwila, Public Works Department, Engineering Division, Storm Drainage Section; is to review and approve any changes to this Operations and Maintenance Manual prior to changes in its implementation. Additionally, any changes in ownership or person of responsibility are to be reported to the City of Tukwila, Public Works. 21043-Exhiblt D Instrument Number: 20220328000815 Document:COV Rec: S238,50D»��e_18 of 36 Record U�ate:3/28/2022 3:15 P��8�inf�K`oKKKDt��A - STRUCTURE Inspection Frequency INSPECTION �wspeotomReoultm Maintenance RESULTS AND Date MAINTENANCE DONE COMMENT� Modular Wetland 2 Inspection Results Maintenance Done Catch basins and manholes 2 Inspection Results Maintenance Done Conveyance Pipes and Ditches 2 Inspection Results Maintenance Done Grounds/ Landscaping Inspection Results Maintenance Done CB #1 Type 1 3 Inspection Results Maintenance Done CB #2 Type 1 3 |napmctiunReouUa Maintenance Done C8Type 1 3 Inspection ReuuKm Maintenance Done C8#4Type 1 3 Inspection Results Maintenance Done CB#5Type1 3 Inspection Results Maintenance Done CB#0Type 1 3 Inspection Results Maintenance Done 210*3-Exmm o Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -1.9 of 36 Record Date:3/28/2022 3:15 PM King County, WA STRUCTURE Inspection Frequency INSPECTION RESULTS AND MAINTENANCE DONE Inspection Results! Maintenance Date COMMENTS CB #7 Type 1 3 Inspection Results Maintenance Done Pump Station Type 2 3 Inspection Results Maintenance Done SDMH#1 3 Inspection Results Maintenance Done Detention Vault 2 Inspection Results Maintenance Done Yearly (August or September) and after major storm events per manufacturer's recommendations 2 Twice a year 3 Monthly 21043 -Exhibit D Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -20 of 36 Record Date:3/28/2022 3:15 PM King County, WA STORM DRAINAGE VAULT EXHIBIT ELEV. 11.50__\\ 4'X4' SUMP FLOW CONTROL RISER 5.X10' ACCESS GRATE IN/ 2'X2' ACCESS HATCH 12" DIAMETER VENTILATION PIPE (TYP.) 33' 5.0K 24" 'FRAME AND CIRCULAR GRATE 5.0z ELEV. 10.87 ELEV. 11.50 12" SD INLET AEI 11.50 ELEV. 11.50 43—M6otenonoo SCALE: HORIZONTAL NOT TO SCALE BARGHAUSEN CONSULTING ENGINEERS, INC. 18215 72ND AVENUE SOUTH KENT, WA 98032 425.251.6222 BARGHAUSEN.COM For: GREENWOOD HEATING 14027 S INTERURBAN AVE JOB NUMBER 21043 Title: STORM DRAINAGE VAULT EXHIBIT SHEET 1 of 6 DESIGNED_ JRM [DRAWN JRM 'CHECKED _ZIA_ jAPPROVED__DIEL 'DATE 1/112022... • Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -21 of 36 Record Date:3/28/2022 3:15 PM King County, WA 5' STORM DRAINAGE VAULT EXHIBIT 5'x1 0' ACCESS GRATE W/ 2'X2' ACCESS HATCH LADDER TYP. AU. ACCESS POINTS 12" SD 0 0.11.50 (W) PROPOSED GRADE OVER VAULT 4" FRAME AND RCULAR GRATE 24" FRAME AND CIRCULAR GRATE . 2. SD IN ,IE=.16.34 (N) OSED GRADE OVER VAULT • , '.'• „„ FINISH GRADE=20.6 MIN AND VARIES BOTTOM OF UD ELEV.=1B.50 MAX W.S. EL=18.00 5'x1 0' ACCESS GRATE W/ 2'X2' ACCESS HATCH TYP. ACCESS POINTS STATIC W.S. 12. SD OUT 0,67 EL=11 50 .v lE11..50 (Vi) P;59qEDIkAEtIT goRAG (Av9,• „ I-1- SECTION B -B FINISH GRADE=20.6 MIN AND VARIES —BOTTOIA OF LID -5 7 ELEV. =18.50 co L.) DOER TYP. ALL a. ACCESS POINTS 15 n x• • -4- 0 0 N C4 <0. ° 0 11 0 io c7i E 6 `g4 ELEV. 10.67 5' SCALE: HORIZONTAL NOT TO SCALE BARGHAUSEN INffiE CONSULTING ENGINEERS, INC, 18215 72ND AVENUE SOUTH KENT, WA 98032 425.251.6222 BARGHAUSEN.COM For: GREENWOOD HEATING 14027 S INTERURBAN AVE JOB NUMBER 21043 Title: STORM DRAINAGE VAULT EXHIBIT SHEET 2 a f DESIGNED JRM JDRAWN JRM "CHECKED _ZEE_ IAPPROVED_DEB "DATE 3 ‘1/ 2022 Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -22 of 36 Record Date:3/28/2022 3:15 PM King County, WA STORM DRAINAGE VAULT EXHIBIT ME WATER -TIGHT MAX WS EL=18.0 Of E = 17.13 ORIFICE DA. = 0.6" E PLATE WITH ORIFICE AS SPEC. BELOW. ELBOW DETAIL FIELD VERIFY LOCATION FOR ATTACHMENT OF SHEAR niArDLE TO WALL CLEANOUT SHEARGATE HANDLE TO E HUNG Rig FrvLE E tNAGTHE BO EL = 15.50 ORIFICE DIA. = 0.57" UPP S: pATINDGED (Mg ONE SUPPORT) RIANOK,RTE• UT' lE=11. 2' MIN: EL = 7.50 IE=11.5 18" PVC STANDPIPE FRIFigTipilkPLATE FLOW RESTRICTOR RISER SCALE: HORIZONTAL NOT TO SCALE BARGHAUSEN CONSULTING ENGINEERS, INC. 18215 72ND AVENUE SOUTH KENT, WA 98032 425.251.6222 BARGHAUSEN.COM For: GREENWOOD HEATING 14027 S INTERURBAN AVE JOB NUMBER 21043 Title: STORM DRAINAGE VAULT EXHIBIT SHEET 3of 6 _ k DESIGNED JRM. DRAWN JRM 'CHECKED _UN__ 'APPROVED_Da_JDA1E 3/1/4/22_ Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -23 of 36 Record Date:3/28/2022 3:15 PM King County, WA WATER QUALITY VAULT EXHIBIT SCALE: HORIZONTAL NOT TO SCALE BARGHAUSEN CONSULTING ENGINEERS, INC. 18215 72ND AVENUE SOUTH KENT, WA 98032 425.251.6222 BARGHAUSEN.COM DWN z For: GREENWOOD HEATING 14027 S INTERURBAN AVE JOB NUMBER 21043 Title: WATER QUALITY VAULT EXHIBIT HECI PRO TE SHEET 4 of 6 Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -24 of 36 Record Date:3/28/2022 3:15 PM King County, WA WATER QUALITY VAULT EXHIBIT 5 1/2" ADJUST TO GRADE RIM: 21.79' 1038' [124.561 1E: 1h41' r 2X 1318.00' TRAFFIC RATED CAST IRON COVERS, iWITH ex 0111.00'');12" GRADE RINGS, 2x 018.00"x3" GRADE RINGS FIELD POURED CONCRETE COLLAR REQUIRED, BY OTHERS. 12,55 RIM: 21.79' [160.601 BYPASS WEIR INLET, 015,DO" OPENING FOR 012,00' HOPE DRAIN DOWN DEVICE, SK -0962 5''x14" INLET WINDOW, IE: 1141' LEFT END VIEW --'-IE: 9,24' OUTLET, 018.00* OPENING FOR 012.Q17HDPE. UNDERDRAIN OUTLET ORIFICE SCALE: HORIZONTAL NOT TO SCALE 0 BARGHAUSEN CONSULTING ENGINEERS, INC, 18215 72ND AVENUE SOUTH KENT, WA 98032 425.251.6222 BARGHAUSEN.COM For: GREENWOOD HEATING 14027 S INTERURBAN AVE 0' 0 7° 0 a> 0 z 00 M 0 >- a.) ce. 0 cL :0 Es) „J• P < - a o o c7i • - (44 a) 1.Z. JOB NUMBER 21043 Title: WATER QUALITY VAULT EXHIBIT SHEET 5 of 6 DESIGNED JRM !DRAWN JRM !CHECKED 2TW U4PPROVED__20___ 'DATE 1/11,202.2_, Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -25 of 36 Record Date:3/28/2022 3:15 PM King County, WA WATER QUALITY VAULT EXHIBIT SCALE: HORIZONTAL NOT TO SCALE .01406,111MM*1.10 BARGHAUSEN CONSULTING ENGINEERS, INC. 18215 72ND AVENUE SOUTH KENT, WA 98032 425.251.0222 BARGHAUSEN.COM 0 LU For: GREENWOOD HEATING 14027 S INTERURBAN AVE JOB NUMBER 21043 Title: WATER QUALITY VAULT EXHIBIT SHEET 6 4, DESIGNED ._111±11_ 10f2AWN _RAC_ 'CHECKED ZTW JAPPROVED_DKIL 'DATE 3/1/2n Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -26 of 36 Record Date:3/28/2022 3:15 PM King County, WA No. 3 — Closed Detention Systems (TanksNaults) Maintenance Component Defect Conditions When Maintenance is Needed Results Expected When Maintenance Is Performed Storage Area Plugged Air Vents One-half of the cross section of a vent is blocked at any point or the vent is damaged. Vents open and functioning. Debris and Sediment Accumulated sediment depth exceeds 10% of the diameter of the storage area for 1/2 length of storage vault 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 112 length of tank.) All sediment and debris removed from storage area. Joints Between Tank/Pipe Section Any openings or voids allowing material to be transported Into facility. (Will require engineering analysis to determine structural stability). All Joint between tank/pipe sections are sealed. Tank Pipe Bent Out of Shape Any part of tank/pipe Is bent out of shape more than 10% of its design shape. (Review required by engineer to determine structural stability). Tank/plpe repaired or replaced to cosign. Vault Structure Includes Cracks In Wall, Bottom, Damage to Frame and/or Top Slab Cracks wider than 1/2 -inch and any evidence of soil particles entering the structure through the cracks, or maintenance/inspection personnel determines that the vault is not structurally sound. Cracks wider than 1/2 -Inch at the Joint of any inlet/outlet pipe or any evidence of soil particles entering the vault through the walls. Vault replaced or repaired to design specifications and is structurally sound. No cracks more than 1/4 -inch wide at the Joint of the Inlet/outlet pipe. Manhole Cover Not In Place Cover Is missing or only partially In place. Any open manhole requires maintenance. Manhole is closed. Locking Mechanism Not Working Mechanism cannot bo opened by one maintenance person with proper tools. Bolts into frame have less than 1/2 lnch of thread (may not apply to self-locking lids). Mechanism opens with proper tools. Cover Difficult to Remove One maintenance person cannot remove Ild after applying normal lifting pressure. Intent is to keep cover from sealing off access to maintenance. Cover can be removed and reinstalled by one maintenance person. Ladder Rungs Unsafe Ladder Is unsafe due to missing rungs, misalignment, not securely attached to structure wall, rust, or cracks. Ladder meets design standards. Allows maintenance person safe access. Catch Basins See "Catch Basins" (No. 5) See "Catch Basins" (No. 5). See "Catch Basins" (No. 5). Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -27 of 36 Record Date:3/28/2022 3:15 PM King County, WA No. 4 — Control Structure/Flow Restrictor Maintenance Component Defect Condition When Maintenance is Needed Results Expected When Maintenance Is Performed General Trash and Debris (Includes Sediment) Material exceeds 25% of sump depth or 1 foot below orifice plate, Control structure orifice Is not blocked, All trash and debris removed, Structural Damage Structure Is not securely attached to manhole wall. Structure securely attached to wall and outlet pipe. Structure Is not In upright position (allow up to 10% from plumb). Structure In correct position. Connections to outlet pipe are not watertight and show signs of rust. Connections to outlet pipe are water tight; structure repaired or replaced and works as designed. Any holes --other than designed holes --In the structure. Structure has no holes other than designed holes. Cleanout Gate Damaged or Missing Cleanout gate is not watertight or is missing. Gate is watertight and works as designed. Gate cannot be moved up and down by one maintenance person. Gate moves up and down easily and is watertight. Chain/rod leading to gate Is missing or damaged. Chain Is in place and works as designed. Gate is rusted over 50% of Its surface area. Gate is repaired or replaced to meet design standards. Orifice Plate Damaged or Missing Control device Is not working properly due to missing, out of place, or bent orifice plate. Plate is In place and works as designed. Obstructions Any trash, debris, sediment, or vegetation blocking the plate. Plate is free of all obstructions and works as designed. Overflow Pipe Obstructions Any trash or debris blocking (or having the potential of blocking) the overflow pipe. Pipe is free of all obstructions and works as designed. Manhole See "Closed Detention Systems" (No. 3). See "Closed Detention Systems" (No. 3). See "Closed Detention Systems" (No. 3). Catch Basin See "Catch Basins" (No. 5). See "Catch Basins" (No, 5). See "Catch Basins" (No. 5). Instrument Number: 20220328000815 Document:COV Rec: S238.50 Page -28 of 36 Record U�ate:3/28/2022 3:15 P��8�inf�K`oKKKDt��A - No. 5 Catch Basins Maintenance ComponentM Defect Conditions When Mantenanc� is Needed . Results Expected When Is performed General Trash & Debris Trash or debris which is located immediately In front of the catch basin openlng oris blocking Wetting capacity of the basin by more than 10%. No Trash or debris located immedlately In front of catch basin or on grate opening. Trash or debrs (n the basin) that exceods 60 percont of the sump depth as measured from lhe bottom of basin to invert of the lowost pipe into orout vfthe bao|n hmmnocase |�s than minimum ,�six �noheeclearance from lhe debrls surface 10 the Invert of the lowest pipe. No trash or debris In the catch basin. Trash or debrls In ariy Inlet or ouflot pipe blocking more than 1mofits height. inlet and outlet pipes free of trash or debrls. Dead aritmale or vegetation that could generate odors that could cause complalnts or darigerous gases (e.g., methane). No dead animals or vegetation present within tho catch basin. Sediment Sodiment (In Ihe basin) that oxceeds 60 percent of the sump depth as measured from the bottom ofbasin minvert vfthe lowest pipe mb or out of the basin, but iri no case less than aminimum of6inches clearance from the sediment surface to the lnvert of tho lowest pipe. No sediment in the catch basin Structure Damage to FmmonncVor Top Slab Top slab has holes larger than %square lnches or cracks wider than 1/4 nch (Intent Is to make euro no materlal is runriing Into basin). Top slab is free of holes and cracks. Frame not slttlng flush on top slab, i.m.. aration of more than 3/4 inch of the frame from the top sleb. Frame not securely attached Frame Is sittlng flush on the riser rings or top sieb and firmly attached. Fractures or Cracks in Basin Walls/ Bottom Maintenance person ludges that structure Is unsound. Basin replaced or repalrod to design standards. Grout fflet has separated or cracked widor than 1/2 inch andlonger than 1 foot at the joint of any inlet/outlet pior any evidence of soil particlesonteringoatcUbodnthmugh cracks. Pipe 18 regrouted and secure at basin wall. Settlement/ Misalignment 1! failure of basin has created a safety, function, or design problem. Basin replacad or repaired to deslgn standards. Vegetation Vegetation growing across and biocking more than lOYo of the basin oponlng No vegetation blocking openlng to basin. Vegetation growing inInlet/outlet pipe joints that Is rnore than six lnchos tall and less than No vegetation or root growth present. Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -29 of 36 Record Date:3/28/2022 3:15 PM King County, WA No. 5 — Catch Basins Maintenance Component Defect Conditions When Maintenance Is Needed Results Expected When Maintenance is performed Contamination and Pollution See "Detention Ponds" (No. 1). No pollution present. Catch Basin Cover Cover Not in Place Cover Is missing or only partially In place. Any open catch basin requires maintenance. Catch basin cover Is closed Locking Mechanism Not Working Mechanism cannot be opened by one maintenance person with proper tools. Bolts into frame have less than 1/2 inch of thread. Mechanism opens with proper tools. Cover Difficult to Remove One maintenance person cannot remove lid after applying normal lifting pressure. (Intent is keep cover from sealing off access to maintenance.) Cover can be removed by one maintenance person. Ladder Ladder Rungs Unsafe Ladder is unsafe due to missing rungs, not securely attached to basin wall, misalignment, rust, cracks, or sharp edges. Ladder meets design standards and allows maintenance person safe access. Metal Grates (If Applicable) Grate opening Unsafe Grate with opening wider than 7/8 inch. Grate opening meets design standards. Trash and Debris Trash and debris that is blocking more than 20% of grate surface Inletting capacity. Grate free of trash and debris. Damaged or Missing. Grate missing or broken member(s) of the grate. Grate is In place and meets design standards. Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -30 of 36 Record Date:3/28/2022 3:15 PM King County, WA 101 Oldcastle Infrastructure"' A CPO COMM. BIOPOD"SYSTEM WITH STORMMIr MEDIA Inspection and Maintenance Guide 0 Water Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -31 of 36 Record Date:3/28/2022 3:15 PM King County, WA CO Oldcastle Infrastructure" INSPECTION AND MAINTENANCE GUIDE ACNN COMPANY BIoPodTM Biofilter with StormMix'" Biofiltration Media Description The BloPod'" Blofilter System (BloPod) Is a stormwater blofiltration treatment system used to remove pollutants from stormwater runoff. Impervious surfaces and other urban and suburban landscapes generate a variety of contaminants that can enter stormwater and pollute downstream receiving waters unless treatment Is provided. The BloPod system uses proprietary StormMix"' biofiltration media to capture and retain pollutants Including total suspended solids (TSS), metals, nutrients, gross solids, trash and debris as well as petroleum hydrocarbons. Function The BloPod system uses engineered, high-flow rate filter media to remove stormwater pollutants, allowing for a smaller footprint than conventional bloretentlon systems. Contained within a compact precast concrete vault, the BloPod system consists of a blofiltration chamber and an optional integrated high-flow bypass with a contoured Inlet rack to minimize scour. The blofiltration chamber is filled with horizontal layers of aggregate (which may or may not include an underdraln), blofiltration media and mulch, Stomiwater passes vertically down through the mulch and biofiltration media for treatment. The mulch provides pretreatment by retaining most of the solids or sediment. The blofiltration media provides further treatment by retaining finer sediment end dissolved pollutants. The aggregate allows the media bed to drain evenly for discharge through an underdraln pipe or by Infiltration. Configuration The BloPod system can be configured with either an internal or external bypass. The Internal bypass allows both water quality and bypass flows to enter thetreatment vault. The water quality flows ere directed to the blofiltration chamber while the excess flows are diverted over the bypass welrwithout entering the biofiltration chamber. Both the treatment and bypass flows are combined In the outlet area prior to discharge from the structure. BloPod units without an Internal bypass are designed such that only treatment flows enter the treatment structure. When the system has exceeded Its treatment capacity, ponding will force bypass flows to continue down the gutter to the nearest standard catch basin or other external bypass structure. The BloPod system can be configured as a tree box filter with tree and grated inlet, es a planter box filter with shrubs, grasses and an open top, or es an underground filter with access risers, doors and a subsurface Inlet pipe. The optional internal bypass may be Incorporated with any of these configurations. In addition, an open bottom configuration may be used to promote Infiltration and groundwater recharge. The configuration and size of the BloPod system Is designed to meet the requirements of a specific project. Inspection & Maintenance Overview State and local regulations require all stormwater management systems to be Inspected on a regular basis and maintained as necessary to ensure performance and protect downstream receiving waters. Without maintenance, excessive pollutant buildup can limit system performance by reducing the operating capacity of the system and Increasing the potential for scouring of pollutants during periods of high flow. Some configurations of the BioPod may require periodic irrlgatlontoestablish and maintain vegetation. Vegetation will typically become established about two years after planting. Irrigation requirements are ultimately dependent on climate, rainfall and the type of vegetation selected. 2 Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -32 of 36 Record Date:3/28/2022 3:15 PM King County, WA Maintenance Frequency Periodic Inspection Is essential for consistent system performance and Is easily completed. tnspectlon Is typically conducted a minimum of twice per year, but since pollutant transport and deposition varies from site to site, a site-specific maintenance frequency should be established during the first two or three years of operation. Inspection Equipment The fallowing equipment Is helpful when conducting BloPod inspections; • Recording device (pen and paper form, voice recorder, !Pad, etc.) • Suitable clothing (appropriate footwear, gloves, hardhat, safety glasses, etc.) • Traffic control equipment (cones, barricades, signage, flagging, etc.) • Manhole hook or pry bar • Flashlight • Tape measure Inspection Procedures BioPod Inspections are visual and are conducted without entering the unit. To complete an Inspection, safety measures Including traffic control should be deployed before the access covers or tree grates are removed. Once the covers have been removed, the following Items should be checked and recorded (see form provided on page 6) to determine whether maintenance Is required: • If the BloPod unit Is equipped with an internal bypass, Inspect the contoured inlet rack and outlet chamber and note whether there are any broken or missing parts. In the unlikely event that Internal parts are broken or missing, contact Oldcastle Infrastructure at (800) 579.8819 to determine appropriate corrective action. • Note whether the curb Inlet, inlet pipe, or - if the unit Is equipped with an Internal bypass - the Inlet rack Is blocked or obstructed. • If the unit is equipped with an intemai bypass, observe, quantify and record the accumulation of trash and debris In the Inlet rack. The significance of accumulated trash and debris Is a matter of Judgment. Often, much of the trash and debris may be removed manually at the time of Inspection If a separate maintenance visit Is not yet warranted. • If It has not rained within the past 24 hours, note whether standing water Is observed In the biofiltration chamber. • Finally, observe, quantify and record presence of Invasive vegetation and the amount of trash and debris and sediment load In the bioflltratlon chamber. Erosion of the mulch and biofiltration media bed should also be recorded. Sediment load may be rated Tight, medium or heavy depending on the conditions. Loading characteristics may be determined as follows: o Light sediment load - sediment is difficult to distinguish among the mulch fibers at the tap of the mulch layer; the mulch appears almost new. o Medium sediment load - sediment accumulation is apparent and may be concentrated In some areas; probing the mulch layer reveals lighter sediment loads under the top 1" of mulch. o Heavy sediment load - sediment Is readily apparent across the entire top of the mulch layer; individual mulch fibers are difficult to distinguish; probing the mulch layer reveals heavy sediment load under the top 1" of mulch. Often, much of the invasive vegetation and trash and debris may be removed manually at the time of inspection if a separate maintenance visit Is not yet warranted. Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -33 of 36 Record Date:3/28/2022 3:15 PM King County, WA Maintenance Indicators Maintenance should be scheduled If any of the following conditions ere Identified during Inspection: • The concrete structure is damaged or the tree grate or access cover is damaged or missing, • The curb Inlet or Inlet rack Is obstructed, • Standing water is observed In the biofiltration chamber more than 24 hours after a rainfall event (use discretion if the BioPod Is located downstream of a storage system that attenuates flow). • Trash and debris In the inlet rack cannot be easily removed at the time of Inspection. • Trash and debris, Invasive vegetation or sediment load In the biofiltration chamber is heavy or excessive erosion has occurred. Maintenance Equipment The following equipment Is helpful when conducting DVS maintenance: • Suitable clothing (appropriate footwear, gloves, hardhat, safety glasses, etc.) • Traffic control equipment (cones, barricades, signage, flagging, etc.) • Manhole hook or pry bar • Flashlight • Tape measure • Rake, hoe, shovel and broom • Bucket • Pruners • Vacuum truck (optional) Maintenance Procedures Maintenance should be conducted during dry weather when no flows are entering the system. All maintenance may be conducted without entering the BloPod structure. Once safety measures such as traffic control are deployed, the access covers may be removed and the following activities may be conducted to complete maintenance: • Remove ell trash and debris from the curb Inlet and Inlet rack manually or by using a vacuum truck as required. • Remove all trash and debris and Invasive vegetation from the blofiltratlon chamber manually or by using a vacuum truck as required. • If the sediment load Is medium or light but erosion of the biofiltration media bed Is evident, redistribute the mulch with a rake or replace missing mulch as appropriate. If erosion persists, rocks may be placed In the eroded area to help dissipate energy and prevent recurring erosion. • If the sediment Toad Is heavy, remove the mulch layer using a hoe, rake, shovel and bucket, or by using a vacuum truck as required. If the sediment load is particularly heavy, Inspect the surface of the biofiltration media once the mulch has been removed, If the media appears clogged with sediment, remove and replace one or two Inches of biofiltration media prior to replacing the mulch layer. • Prune vegetation as appropriate and replace damaged or dead plants as required. • Replace the tree grata and/or access covers and sweep the area around the BloPod to leave the site clean. • All material removed from the BloPod during maintenance must be disposed of In accordance with local environmental regulations, In most cases, the material may be handled In the same manner as disposal of material removed from Bumped catch basins or manholes. 4 Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -34 of 36 Record Date:3/28/2022 3:15 PM King County, WA Natural, shredded hardwood mulch should be used In the BioPod. Timely replacement of the mulch layer according to the maintenance Indicators described above should protect the biofi tration media below the mulch layer from clogging due to sediment accumulation. However, whenever the mulch Is replaced, the BloPod should be visited 24 hours after the next major storm event to ensure that there Is no standing water In the biofiltration chamber. Standing water Indicates that the biofiltration media below the mulch layer Is clogged and must be replaced. Please contact Oldcastle Infrastructure at (800) 579-8819 to purchase the proprietary StornMlx" biofiltration media. BloPod Tree Module BloPod Planter Module BloPod Media Module BioPod Media Vault Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -35 of 36 Record Date:3/28/2022 3:15 PM King County, WA BioPod inspection` Maintenance'Log< Condition of lnternal Components Standing Water In Biofiltration Chamber Trash and Debris in Biofiltration Chamber Invasive Vegetation In BioNtratlon Chamber Sediment In Blofiltration Chamber Instrument Number: 20220328000815 Document:COV Rec: $238.50 Page -36 of 36 Record Date:3/28/2022 3:15 PM King County, WA