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HomeMy WebLinkAbout2021 - Declaration of Covenant for Inspection and Maintenance of Stormwater Facilities and BMPS - King County / City of Tukwila - 20210709002625Instrument Number: 20210709002625 Document:COV Rec: $177.50 Page -1 of 75 Record Date:7/9/2021 5:01 PM Electronically Recorded King County, WA DocuSign Envelope ID: 778D21 E5-150D-49D8-8A2D-B0996C937CCE After Recording Return to: City Clerk City of Tukwila 6200 Southcenter Boulevard Tukwila, WA 98188 DECLARATION OF COVENANT FOR INSPECTION AND MAINTENANCE OF STORMWATER FACILITIES AND BMPS Grantor(s): KING COUNTY, a home rule charter county and political subdivision ofthe State of Washington Grantee(s): CITY OF TUKWILA, a Washington municipal corporation Abbreviated Legal Description: Ptn Tracts 21, 22, 31 and 32, Riverside Interurban Tracts, Vol. 10, Pg.74 A full Legal Description of the Property is attached hereto as Exhibit "A". Assessor's Tax Parcel ID No.: 7340600480 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: 8177.50 Pagc-2 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID: 778D21E5-1500-49D8-8A2D-B0996C937CCE DECLARATION OF COVENANT FOR INSPECTION AND MAINTENANCE OF STORMWATER FACILITIES AND BMPS IN CONSIDERATION of the approval and issuance ofthe City of Tukwila Public Works Permit No. PW 19-0047 relating to the real property as described in Exhibit "A" attached hereto and by this reference incorporated herein ("Property"), King County, a home rule charter county and political subdivision of the State of Washington (the "Grantor"), pursuant to this Declaration of Covenant for Inspection and Maintenance of Stormwater Facilities and BMPs (the "Declaration of Covenant") for the benefit of the City of Tukwila, a Washington municipal corporation (the "Grantee"), does hereby grant, covenant and agree that it shall observe, consent to, and abide by the conditions and obligations set forth and described in the following Paragraphs 1 through 10 hereof with regard to the Property, and does hereby grant to the Grantee an easement with respect to the Property as described in Paragraphs 2 and 3 hereof. 1. The Grantor or their successors in interest and assigns (collectively, the "Owner") shall, at their own expense, operate, maintain, and keep in good repair, the Property's stormwater facilities and follow hest management practices ("BMPs") identified in the plans and specifications submitted to the City of Tukwila (the "City") under Public Works Permit No. PW19-0047 (the "Permit"), The Pennit was approved by the City on May 24, 2019 and revisions to the Permit were approved by the City on August 8, 2019. The Permit was issued on July 25, 2019. Installation of the stormwater facilities received partial approval inspections by the City in 2019, 2020 and 2021. Collectively, the Permit includes the Stormwater Facility Site Plan (Exhibit B) and the Operations and Maintenance Plan, including the inspection schedule, (Exhibit C) The term "stormwater facilities" includes conveyance pipes, catch basins, manholes, detention vaults, control stnicture/detention flow restrictor and bioretention system (bioscape) by Contech Filterra (engineered stormwater treatment system incorporating certified pretreatment mulch and hioscope plants) designed to manage stormwater on the Property. Instrument Numbcr: 20210709002625 Documcnt:COV Rec: 8177.50 Pagc-3 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID: 778D21E5-150D-4908-8A2D-E30996C937CCE 2, 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 City of Tukwila Code ("TMC") 14.30.080. This right of ingress and egress, right to inspect, and right to perform required maintenance or repair shall be as provided for in Paragraph 3 below. 3. 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 (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 sent 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. 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. 5. The Owner shall assume all responsibility for the cost of any rnaintenance or repair work completed by the City as described in Paragraph 3 or any measures taken by the City to address imminent hazards as described in Paragraph 4. 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. 6. The Owner is hereby required to obtain a Type C Public Works permit from the City priorto 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 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: 8177.50 Pagc-4 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID: 778D21 E5-150D-49D8-8A2D-B0996C937CCE in this Declaration of Covenant. Prior to the final approval and issuance of the new pen -nit, a new Declaration of 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. 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: To Grantors/Owner: City Clerk King County Metro Transit Department City of Tukwila Attn: Transit Real Estate & Environmental (TREE) 6200 Southcenter Blvd. 201 South Jackson Street, mailstop: KSC-TR-0431 Tukwila, WA 98188 Seattle, WA 98104 email: transitproperty@kinecounty.gov With a Copy to Metro Transit Department Facilities email: Talon.swanson@kingcounty.gov 8. With regard to the matters addressed herein, this Declaration of 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 he 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. 9. This Declaration of Covenant is intended to protect the value and desirability of the real property described in Exhibit "A", promote the efficient and effective management of surface water drainage on the property, and shall inure to the benefit of all the citizens of the City. References herein to the TMC shall include subsequent amendments to such statutes and all successor statutes. 10. This Declaration of Covenant shall run with the land and be binding upon the Grantor, and the Grantor's successors in interest, and assigns. 11. This Declaration of Covenant may be amended or terminated only by execution of a written agreement by the Owner and the City which is recorded by Grantor with the King County Tax Assessor's Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-5 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID: 778D21E5-154D-49D6-BA2D-B0996C937CCE EXECUTED AND EFFECTIVE as of the date last signed below. FOR GRANTOR: King County C,Docuslgned by: K-,; Bryan vague, Manager Real Estate Services Section King County Dep't of Executive Services 7/1/2021 FOR GRANTEE: City of Tukwila Hari Ponnekanti Public Works Director DATE: DATE: C'' Approvo dsWo Form: By:aevo vnee<re... Deputy Prosecuting Attorney Approved as to Form: By: re. sre. �f7jlt zPi, City Attorney NOTARY BLOCKS APPEAR ON FOLLOWING PAGE Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-6 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID:776D21E5-150D-49D8-9A2D-B0996C937CCE Office. [The remainder of this page is intentionally left blank. The executing signatures of the Grantors and Grantee are on the following pages.] Instrument Numbcr: 20210709002625 Doeument:COV We: $177.50 Pagc-7 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID: 778D21E5-1500-49D8-8A2D-B0996C937CCE STATE OF WASHINGTON } COUNTY OF KING ss. uean Hag On this day personally appeared before me Bry, to me known to be the Manager, RES of KING COUNTY, the home rule charter county and political subdivision of the State of Washington that executed the foregoing instrument, and acknowledged such instrument to be the free arid voluntary act and deed of such county, for the uses and purposes therein mentioned, and on oath stated that he was duly authorized to execute such instrument. GIVEN UNDER MY HAND AND OFFICIAL SEAL this 1st day of July , 2021. STEVE RIZIKA Notary Public State of Washington Commission # 178995 Commission Expires 5/30/2023 } STATE OF WASHINGTON COUNTY OF KING DocuSigned by: [Stem Printed Name Steve Ri zi ka NOTARY Phyvijijpnilsfill-rIllae State of Washington, residing al My Commission Expires 5/30/2023 SS, On this day personally appeared before me ri-k to me known to be the ¢ 01; (-¢f c , 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 she was duly authorized to execute such instrument. GIVEN UNDER MY HAND AND OFFICIAL SEAL this ,2021. ¢i¢¢, ¢.„ Printed Name day of NOTARY PUBLIC in and for the State of Washington, residing at —it My Commission Expires (1/7 y,;? Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: 5177.50 Pagc-8 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID: 778D21E5-150D-49D88A2D-B0998C937CCE EXHIBIT "A" LEGAL DESCRIPTION OF PROPERTY THAT PORTION OF TRACTS 21, 22, 31 AND 32 OF RIVERSIDE INTERURBAN TRACTS, ACCORDING TO PLAT RECORDED IN VOLUME 10 OF PLATS AT PAGE 74, IN KING COUNTY, WASHINGTON, DESCRIBED AS FOLLOWS: BEGINNING AT A POINT ON THE WESTERLY MARGIN OF PRIMARY STATE HIGHWAY NO. 1, FOSTER INTERCHANGE TO SOUTH 1181'11 STREET, AS CONDEMNED UNDER SUPERIOR COURT CAUSE NO. 646846, THAT BEARS SOUTH 04°33'59" EAST 165.03 FEET DISTANT FROM THE POINT OF CURVATURE OF THE WEST MARGIN, HIGHWAY ENGINEERS STATION 76+05.30, SAID POINT ALSO BEING THE SOUTHEAST CORNER OF THAT CERTAIN TRACT OF LAND AS DESCRIBED IN OPTION AGREEMENT RECORDED JUNE 09, 1975 UNDER RECORDING NO. 7506090402; THENCE SOUTH 04°33'59" EAST ALONG SAID MARGIN 615.17 FEET TO A POINT LYING 110 FEET WESTERLY OF AND OPPOSITE ENGINEER'S STATION 68+25; THENCE SOUTH 58°17'25" WEST 230.02 FEET; THENCE SOUTH 2132'52" EAST 36.80 FEET TO THE SOUTH LINE OF TRACT 32 OF THE RIVERSIDE INTERURBAN TRACTS; THENCE NORTH 89°17'24" WEST 476.97 FEET ALONG THE SOUTH LINE OF TRACTS 31 AND 32 TO THE EASTERLY MARGIN OF EAST MARGINAL WAY AS ESTABLISHED BY WARRANTY DEED FOUND IN KING COUNTY RECORDED DECEMBER 09, 1974, RECORDING NO. 7412090465; THENCE NORTH 18°38'24" WEST 12.65 FEET ALONG SAID EASTERLY MARGIN; THENCE NORTH 1254'24" WEST 443.48 FEET ALONG SAID EASTERLY MARGIN; THENCE NORTH 10°07'24" WEST 333.78 FEET ALONG SAID EASTERLY MARGIN TO THE SOUTHWEST CORNER OF OPTION AGREEMENT RECORDED JUNE 09, 1975 UNDER RECORDING NO, 7506090402; THENCE SOUTH 89°17'24" EAST PARALLEL TO THE SOUTH LINE OF TRACTS 31 AND 32 OF RIVERSIDE INTERURBAN TRACTS A DISTANCE OF 774.30 FEET TO THE POINT OF BEGINNING. 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REVERE E:M'L1U 411 rxyarkbmtn PER EttECTEENTE RCECN:`F 84 ANi^, 4445'5".. tLAMTENIXT 115.7.24+4,411+, 4 W Sten' : � ., 0.4t CANT CREEL NENJ_111111.1111 MOPE, 440'O+ 644++ +4x 415 +0 EATEN b1424444 "i44A,1E A. I.7, WELL 51,on 14+.'+8,:.5.;.TH44.NLCE'FSVI' THE 'MAX $ NOT 104.044'*Ata4'. 0 +11++41440011 M ti EVENt'0 NEVEM MEOW TEN ;9d] e. if '+E _110044 4+04.'.S X1 41+14+ 4 +44+4+444 EV Mi4Nt VAENT NELL. t. THE Mkt E 444044+00 EEC Et E441+4+2000011400 a3 a tEs.,2444404,tt, IKE 4*:.'t4T PEi.R',M;++4++T 444000't.1M. E. "WC +2+41 T Et•N0+1",XCE MMINCA1440+06'0 +4:44•IVENE, MEW) rt,9 �'� 140NEASLETEET 441ANEE. TOE CCE NEENEC 2+0+44000. SOUTH BASE EXPANSION itEINELOPga N"C PFNMAMP'Ci' STORMWATER OVERALL PLAN C2.06 Instrument Number: 20210709002625 Document:COV Rec: $177.50 Page -15 of 75 Record Datc:7/9/2021 5:01 PM King County, WA 1154 IFILTF(544 1 48. x At4' TREE 058!41(0 FRAMP 07*4.1Ek4 2d"57 6 a" 8644855' AA441 0011:1 GAL'` G6aM47UT 24"1434"65( ANC) 00V 00(176114 "O PVC (64845(140540.0540114 #4A14451u F001 JOINTS __..�..»• 644,49 F4445IPT404 ALJ.Ell 43Y PLA(141(059 NO "E N CTA: k. to INFATI044 444T[' 1(4444 (4 444 441314544 40064 0Nl"E! 4 C:Y STANDARD 6(115 14RA 0.950(4 Bh545 0.54 1054 SYSTEM CONDUIT 7.14 P40 (44.437.4514 PLACES 1 x 4" FRAtw 4410 COVER -.» 4 4149 L (44 t" LPY4 010(441)4, (CAS7`-4444 PLAN VIEW ".FT 0WMfiJ. PLAN VIEW TOP 46 N 4© OT SHOWN 3454(1104 UTLE T PIPE NW FILTERRA SEQUENCE 010 (1] 1c -ALE: NT> C1.17 ! sra?rw IFC SET TREE GRATE RNA TOP OF STRUCTUR 5584514 ELEV. 24153 4(11 F.T P1P4 EtYV, 511.E°.1. 0 21471 0441T1.LT 44(4 51146. fI 11941 P40 ¢11(108171144414 04671, ET PIPE RIGHT END, VIEW TETRA TECH vi. :i PIM."164;54451 le'A'Pd',:7Y 34'"4(6.6"Y 89E440444}Z6 SFPA41. 44:51 IN 15"'44 X2fJ.0.W(",P.I W339-1 C?E3 1441# 4454 I45044.481i4(4 00414'44411(0 1415 DRAWING 4. 4144140411455'4444514 44444111.4954114414'4 ( LOAD 54417140. 484144.4440 6444COVER 01 8 • 4'.. 4441 44401 FAV4.YPR E4.1VA'41051 A7, (34 41(11069 (514(4 09411411 544411'.44115144) Li EV44404. 6414424144 17 4410011441 10 414411448 ACTUAL 44404440144114 E1E464'41044. 644444 GS 44541 48584 44441 0 4814 A1u0 RF. 04141 W4144 THF, 4)11.1,15 445 i 0UCa 6- P11113144115 814009064, 85640, 814l'4411444$1'0448514311(1 0041'0545.418141 4 AS7'M 794;54. 441114 0 .448 AND 14049544 154(4'. 5610 TOR 115154443153 METHOD 8. 6+LA447, 81609 4842 0441814'1414019 412C1185(4P54)4449 554 001411(054 9540 81428255161 RT 145.447 045' SYSTEM ACTIVATION. PL.A43T 51.1011044 SHALL BE DONE BY TFL'.' 24104441.897 0SI 65104€415,0174 4410455484540F 5(11E4'161 PROJECT 518553 55 441,` R41I150AT}R4614 FlUitiVE ALL 4445"5144.8 muss NOTED CMFEKNESE AVON U4YA(1554?.4s yall.10EFA 45145 STRU%"4114.`.51 ('4445'x'5.414' }NThe:.YYCkJR. 694:1 E4:G' 4 44Ew`.1 .4 Sd::LJRUNS LL4, REP*Fi 44.4631(1145054541)'55151 A, 5447 811541482, 840"41'IL 442414. Malang (811'4'(01AT404 (4041354658 1 8111-45844015150 (448484 00, 444014AK}N4 AND SHALL 851.43056444144 2514455634604' 576.6"1.%56! B . 0058455140"4441'1) PROVIDE 544455454587 654175 SW F'P 5441514#71R-SVNG 4440 57`4404'517#4€0014` 'MUFF AND 451776851 l'l11`0R4A (4 44(01445kc. 4844051C114 MR WO' 0341,E1:$ 44¢50€7154(..8 FOR 548674' (414 145104(041114 01 DAMAGE. 70 414(5b'4 65151. 14744U111'(15544 C. 0054446441'l'44'444 MS 1AL4. Jaw (1 S6x,41 A4l7 BETW444444 A4.k. STRUCTURE SECTIONS AND 44.:54434 4. 4'75110 ..RE. 14, 047444)4411'1444'18P4084145(. IN37 U t 4-444 9440. 497 74 4.1' 44411 E. 4'.044440-44bi'M FIASNPF,PIALT.5444544 444)4(144.E f 44545( 4ll11444544 *.5544 70 4145444,6 TREE 4)44 414 1 4 544 8 4 Old 011'i.154.46A4.444(4445_ 4444,44414417.4 4441 1414.4.E DEUVEREO 14413444 4'41154 (444804'1lk1I F. 005177440"4444 TO 11542 44"14 ;25'414114 44184414(44 10 P54054E411 64171444 4,8617441446. FROM C",CS.4S'INt1C7('444'44h.:14Tk,G7 EROSION 444,43344'5 C;. 01'741744444 54E4444444444,44 FOR 401418T1141404 THC 4145(4414'14.44:44451C4.L'0F:�4N 6 4fiJfiL Or 54451 51^4 01(5145154 PLANT. 45114,4`44 IK 1494411' d 4544 PF.ACP444 95 }444`1'449y��4430(1. A4;144A 4014 0441 CFCCARS WHEN 11.447, 54444,4 KILO, 44:94444444() WITH 1=14,4, PAYMENT T 4415144,11644614 SWEPT C116141104' 8144,4)1411.74141 EE4144844'7 55, CONTACT 114x4'!51:051MAINTENANCE, 44441496.0 1'1444740444445441.. 4.5.4,5"'51744444 SCHEDULE ACTIVATION 1 41 444 14101455,45(41410415441 ALL 5114.71554( 1454514 5984 44T64644 %Y 155551041'ON 45418 4445 SPRINKLER 44"4''114454OFF 4414141146154)48'.qt:MR.54414441)4MAY 54144(14(41 Y'"1.7441745 14t4f44",MST1414 HOLES FOR NEW OR 2%435441) 1554414747444 1. 54.4 UPON 455X.1551.%7 610441654 5355144, 84'41404154A4T14 E481157 S'4044"554,614188. 144(44438.5454 1104).445440 042 511048 46A;X 144016 R4NT 47'441' 5"9578{±5 CONTRACT 0442 Gwtwmau LAYOUTS 03 T i .. .... FTPOCU�43 M1.551R0 35A?L4f45 DIVj4E' 4751 """'"'".,••"". SOUTH BASE PXPAl49FQt4 QEV 45(QPM EN T PROJECT STORMWATER OVERALL PLAN C5.05a Instrument Number: 20210709002625 Document:COV Rec: $177.50 Page -16 of 75 Record Datc:7/9/2021 5:01 PM King County, WA MATERIALS UST L480248 141(S(4411)' 0340 PLAN1 SEE GENeRN, NOTE 6 3 It33 330 MULED SEE GENERAL NOTE 6 „LOVERSYDSSIPAPONCW OYER 5725 /33 1 El' TERRA MEDIA 6 II I'332 '433 frr i .4 ,1, 144141 801)3, CATE I II, 5 I 3310 AlIl' 014 2,22-3,2533332,53,53=2/=I:5552523,2255=5.52353,55GES 35.25342E2 FEE 335 '3 14 13 rtIttr.P3rft3, .AI/57.3.it', A 4013 IF LI F3r NIX wr twutty.33t3533rww", 055/5.53R3F 'Wu/41D 3 'Ft/1,n .3322IN , 0 0141)20 04, NTOTNIT' NV" 3,4 '14 1'4%4E34 545 55544.553,445,05, : "vow misstat.i.volAg vonts; xrda lusti rnz OTII ti3FM d/It t ' FELP,23 W.3,E5F 5335I3 ANON , I F1'4d. FDA', MOW END FL FVATION DETAIL sloNs IFC SET L4434974:10,1 PROVIDED 3' 0111110 ACM CONTE:CH CONTECH CONTECD 74,744,7 MUHL IFFAT ON MEDIA INFII TRATION RATC 35 irtrhr 810S CA PE IS OPEN TO TNE ATMOSPHERE IN mi A MENA SURFACE RECESSED BELOW FINISHED [EVADE. CONTRACTOR OR OWNER IS RESPONSIBLE FOR PROV/DING ANY REQUIRED spiEre MEASURES AROUND'S/ESTE/NI PERIMETER. TO MAINTAIN AESTHETICS, REMOVAL (18 3461408 STORM/MATER DERRY/2 MAY PE NECESSARY BETWEEN '233.°'fiTF.VANCA EXE _3_33 GEKE NoTL0 '171.50-,:rm Id -PROVIDE Ad MATERIALS UNLESS 44010 1)134031W1331 2 EN:TERRA WATER QUALITY STRUCTURE SHALL DE IN ACCORDANCE WITH ALL 1)004014 181)8 Arc INFURMARON CONTAINED ID THIS ORAMKG 6 PLANT, MULCH, PERNA AND DISSIPAMON ROCKS SUPPLIED BY COMMON AND DELIVEREG AT TVA OE SYSTEM ACTIVATION. PLANT SELECTION SRAM,. 001(08018131310(44018004308888081)111 ACCORDANCE WITH THE PROJECT PLANS 43110 88801181)018. (8 1434 30 A. ANY SU4443ASE, 0310111 11E1112AN31FOR ANTLELOTATION PROVISIONS ARE SI1E5S342 DESIGN CXYNSIDERATIONS ANC SHALL BE SPECIFIED EY ENSINEE33 OE RECX)RD CONTPACETOR '113 TAKE APPROPRIATE MEASURES TO 1430111 01 FILTERRA AILIGIA BAY FROM (...lorvsT811clION,RELATED 131 3044 RUNOFF' C. CONTRACTOR IS RESPONSIBLE FOR ACTIVATION 0E THE 308 WHICH INCLUDES 114144011( 31 ELL Snomo PLANE, IDE.DIA DISTALIATION, '4111 ,1l INSTALLATION, AND PLACING OF DISSIPATION PCK53. ACTIVATION. ONLY OCCURS 4844413 SE /S FULLY 4813311 09\'l R NAL FAVEMENT OR LANDSCAPING INSTALLED AND 164341 1) CO4 10UC/DON SELXNENT LL ALL ricreRRA SNITS MIDST BE WATERED SY IRRIGANON LINES OR SPRINKLER SYSTEMS ON A 1111 3144,1, FILTEPPA GRITS MAY BE EQUIPPED WITH IRRIGATION HOLDS R5R NEW OR XISTIN53 IRRKFALIGN LINES UPON REDDEST PLANT 0REA4AF/31 153505,25 „. 03553 3../ ET crko,maa /I WEEK 0<4(4484 30816313141301 417410A44 1`1,7."!4"474 PER !''!,',4V• '4! '444`1) 0",! 4,14:;11zJE-0,-, IZXTA74 4, $.4417 C.,P44.4 44 <4,1.4 ,Nor41 IIDENTA EN, 31,311 ci,EV4T31oNRETNk. kpffE) TETRA TECH wxx LAMA OCCOlt,CC '"7 01, t,c4(7/r .01,404V,KA4 044,44,„ti. 43o441 4304 Plit,147en Al -YAW IC ,T74:004,7e7V e1:1M4 IXAEP $C1,747,1',4L- 1, 113414131413 '4341313<313EIMER 4114.3144l414.14, 3,13I131J1"1,4. 13151) 31-4041161408116, .PWA_,FILLM.11#9. 747, PLAN7Nal Siik_L BE A AK/A )17,0 CUM. E 1-408314' 14:1 44314441411 8141 4134314 Ck4NEX ORNF:7!7,-, (S4C,',644 SEF7aC 2. 74-43< 4444,4 4's s•rx...,1 9.5 441,3(40341131)133741318144311)44 1)34404144)41 (33' C)R, toggfoR-WKIk- 'THE !,';!f.VATCY.74,74t7 4)411)81F44134474054 411147.1. 4313 .S.KORE is" 4141315133<1)43.1413 (4414161131)4)41.1314<13 C,RDERE7, —774113044 MC4CR4C4V: 0,44,744441,74747 47471,444641 4'7'4:44774, 0404,434333'1 Vr41 43134., 4,!: CENT . F741)! 17314)47314 " Kr4ek V11 <IA 117 OF P4.11A aarromot mom 01.444 E,4116731747P 04.4774 4,44144 MF. -T4441 ramsir rivisos SOUTH BASE EXPANSlON DEVELOPMENT PROJECT STORMvVATER OVERALL PLAN C5.05b Instrument Number: 20210709002625 Document:COV Rec: $177.50 Page -17 of 75 Record Datc:7/9/2021 5:01 PM King County, WA OUTLET CMC 4144 (NOT CRY CON 0 16 6 46 6666 1'4441;46 646 226 eere ENEROY orsrAP 62044 ROCK PLAN VIEW NNW INNOO 1:4160 Sc CeRNT8164* (22^4 } T A R,{Ef.7tM1.;;.d,6444AN TALC A„F:°ST tMti.kd, 64440 '21214 2 44 ,16 6Tw tsv*646 a,tJPBTS:(';t=[ 1'LY F"'h"d'{"✓ii?6i fi.LL M.hhiC44664340633144."1VEi00F6+i:Mr431*. 2. Fit. 1 `✓�A.T1144 ai3.l.M1i..PT'C CTRUCTU6C 214462L 4421 214 NOCORDAN42'MTH ALL VOS4 21 DATA NV '44' CTNNVI'+.F16141216*.6Y 46144 CF 44 04i„t 676666446 6414 E. 4'44162, 1444#.C'tR4 46 461 61 a 44 eRNA 1602161OOJTS RUNTINNO keR 10114 egeNTeCN AND NiNer 46 *44 1) AT S6A , or 212""f k hG"Ct44160ti. B 44421' SIRENNON eNTALL €446 16C*1 . RY 014 66441 642614* Or 611;:NORR r 4 ACCOR128NC.*1 W1 { Tb{£:.."6a<.214412 4414.1411 4460 SPERON6C1*TKNS, IP 'T, EANT:&6651*! Nott A. NNW SURTeASee 94.24;24 vcoiro 1E44A11 44. 604121461441046 70 244416 0041 S'6T2U 6`210*21414'LsAT E Q C,. CONTRACTOR Re6E`4064216 6 44 THE sPirroArim 61L4Ni'. 06064 `1C#T*L41 reNS4AT4e;4M1 MON, ACTUATION OMR PAVEMENT OR LANDSCAPING C14S2A44EE+ ET 411, Re:TERRRA. 1212113 MORT RE W4T444*460 feer E KOMAR MANS reTTER264 16423 MAY DE ESU4 446612121240144446246241711 4 414 S 2612*N r a ;116344 wr: Arr ELEVATION VIEW w IFC SET Aua oullTti-E i 206616 *pf 01'#66* i-4k:V P' 21;1. 4CA"r, 1114 .t 461 464 a 42 2144` 4116 Yt Cx7t'6v7A4 ELE6o 242.4` HT ENO ELEVATION VIEW TECH SW FRLTERRA OS APE SEQUENCE 031. ,ac.Pel,.te�'.FLw.m..,..w....,..a.... 1466280 TRANSIT DP/MON SOUTH BASE P.J(PANB101.1 DEVEIGPMENT PROJECT STORMWATER OVERALL PLAN C5.05c Instrument Number: 20210709002625 Document:COV Rec: $177.50 Page -18 of 75 Record Datc:7/9/2021 5:01 PM King County, WA TRIO OUTLET A CONITRAC:Tu TO POMO OUTLET CA.TC44 BASIN 444VATITYFA. U E BOVE 1i47A;T1`k' 'Y E;Y court:4 g 111 .4ATA 1TE AWOL /NM CASTEN PLACE RATA NOT EY CONT RNT ARELLARNENNERN F" FORETE"NTK) ATAACSSPITELT;: CS GRADE, OCINTRP6 WOO 'APE ANYTIME Thd AY HE NEi,.G..E*PARY 1 i`. L.. pruorw uCra: PLAN VCEW A WIN na.rsv4<rmcp 444 ELEVATION VIEW IFC SETAJ11 C.JP Q7 (?} S8 T 12"(4 CxiTI T COLIPLINC. RIGHT END ELEVATION VIEW 1 TOP UND F:6J'AI STONE riTETRA TECH 'yNOTES4 TECH 10P 0 I LI A WATER OLLATI Y 'I BE C;A10UT.AINED IN FIA MD DISSIP'A"1' IAEAL, 4`4VAT'IC & PLANT SET At;'coRr.1ANCE wrm THE PROJECT P MEdATN,LLLAO11."s A. ANYATIY.YF4 NT i L,SA. E ACKF AJ. DEPTH, ANOMIE ANTT F&CTAnoM PR VIRI 'ANE AFTE DESIGN ONF$'1DERATOMS AND SHALL DE SPECIE{ FY E'f\ IEFLER OF RECORD El, CONTRACITOR ro TAKE APPROPRIATE MEASURES Teic"r f'4L7Ei^"AA MFLM HAY FRo CONATRUCTIONERELAT'ER AM)A&AA FILIN PT C. CONTRACTOR IS RESPONSIBLE POR ACTIVATION OF THE SYSTEM WHICH INCLUDES PLANTING RE THE FP'EC;.IF 1540 PL„ANT, MINA IN.M..TP4 LAITOR ME ER INSTALLATION, ANI) P LALI PE> OT” 6J SSIPA'0ON P:00A. ACTTIATa')N ONLY OCCURS WHEN THE SITE IS FULLY STABILIZED WNTP4 ONAL PAVEMENT ON LA4^000APNG IN -STALLED AND CLEANED OF 00000HLIONO0 SERIMEN0 D ALL FIL7000A UNITS MEET FE WATERED EY JORIGAT ON LURES 00 SPRINKLER SYSTEMS ONdA REGULAR BASSO. 10010000 UNITS MAY BE EC'E010000 WE RT 10RIGATICR4HEXER POP RE;SJ 00 EXISTING 1004GATI1014 LINES UPON 000U0S7 AL JPPLfED S!f COIT'E;H AMI CFELte TON „3 AND SPEGI :;ATO DATA AND AT' IME 00011010 OF E N0 4400 1RGO;I POCK LATER 3Y GQNT00.'.'H-- E2° 4012E AE.LMINJUM CHAN*VEL, 20 GAUGE 1410 701000000_ ATTACH 00 CONE1110:TE. PE TERRA VAULT F411141 14 BB0 SUBMITTAL -- 444041 SITS FITTER 14000, TFIOWIL S01ALE HC 00 r[TH 1014 (70 4000044 SE F L P RRA BEOSCAPE, SEPIS.`4..... ........ d PAFTRO TRANSIT DE/MON SOUTH BASE P PANTQ4O DEVEIGPMENT PROJECT STORMWATER OVERALL PLAN Y C5.05d Instrument Number: 20210709002625 Document:COV Rec: $177.50 Page -19 of 75 Record Datc:7/9/2021 5:01 PM King County, WA NOTES 34, 3EEH1VE GRATE 40A44E: 14334 Cl. /8, C1,19, C2,04, C2,05 F. THE NOR PESTRICTOR SNOT BB ENTEBBE°, N THE SUMP OF THE NCETENEN: DE ENRON DRS MAIL E. FREED DEN. THE FENN RpssEc ADE svavyaluaaa SHALT BE REBEL FXNEKTLIFTATON PER LES206 STD PLAN NISTON SED DUAL 3, SHEOL OFTED 2. TEE PRE SHEPHERD AND THE FLOW POSPROTTER SHAN BE CONSTSACTED OF 'rasa sad* WATERED FEW:FRE ANCHORED AP A AMMMUM ACiNG 133416 MAT ATTACH THE NEE saapc,Ras na TEE NORM WITH 61" FEE 4431344744 3044 EXPAENON BOLTBF OE WEBS SE SUPPORTS NTS SPE FAANPOLB LEALL r 2. THE BRINED peps STEM CD THE NOW RESTIOCTOR SRNS. SE TEE SAKE DEOFFETER AD DEE HORZONTAL 33/3i3.47 344 'ERN MEASEPA DAME:7ER 6-F CPT 4. 1333 RUN PBBSOCTOP .6610113 ATESL EADEOF CBE '31 APE FMLOWNG MATENAFTS ).our EN)CABIEBOATED I4 4444110444 411133440344 NDEL EDNA FED 31)4444 4444443 sa,ara ORAN: PIPE 2 33 444 PLUMMET RIDE ETAT SHEET N ACCORDANCE 3341 ASCU E 22E, 5262 TM CR EPS NOT D'ENDERHOTTERLEISTIE STORM SEWER ROB 0, 6, THE PEENS AND LAMES OR STSPB NOE TO OFFSET SO CHAT' TEE SEW GATE iS NNOLF PROM NE TOR RN RATAHTENEN PPACE 30 23104444 06 TEE NOES MO DATE THE MEMO' 34 NEAR CAP TEE CORE. REEF BOSSE PLATE NCH 13330113443434441044344343443414 fl301304444300'LTHE DPEONS El TO PE DER PENNS ENO SMOOTH. LEP SHFCAR GNI SHALL OP ME 02 NAN NEN ALLOY N ACCORDANCE NEN EFFNA B END ANNA 'NE DESLONIONNO BOWL: OR C017 NEN 'O'03443)0333444440 'APTE POSH A 0, ala,43 aaaa THE iNT HARDIE SHALL SEF WADE OF A SONAR METAL FR So ONE ON WENN' GALVANC CCREDSONS 3140113 EP OF' ECSIN POD OR BOLTON TANS wTHA ADOCUSTABTE 4000344 41043444413, NEOPRENE ROBBER SABRED RS ENDURED BETWEES TEE RISER TFODASETD PINCE AHD THE GATE RANGE, WALD Top Bopp so TEAT IDE TENFLETEN. WANE 0 LEVET WHEN TEE GATE N COMBS OLD, BANDED BUDENCES CP THE :',3100301 NE BODE SHALL 62 vADHLES11 RTR 001344444 4437, ND SHEAR SATE NUS SHALL REVENUES ETES, a. THE NEAR GATE hANNBABBSOPEPANG SHALL BE COAATRORED Es1 13333710 044033 TERRIERS A SIDE TAO 04 :SOME OTHER NOME D. ASTERN/CND SHEAR BETE MENNE ARE ACCEPTABLE FA MAID:NAL SRENTIFBANDES APE' Mr . 1FC SONS IFC SET °z MATHS DETAIN NEELANDIRETED OFECONANNEFBASINTATIEBAS :33123.'333133: 4440441 Nyv: 03101 „AABBIAtaBasiaa— sECT"..a'a ava avv,val V, ENE PARABLE 44140'4403DEF PPE DISCHARGE PROTECTION 2016 SWDM SECTION 4.2 / TETRA TECH Aatfr, CURB INLET CATCH BASIN &CAL F., NTS 'caks. 03 JULY 2019 33311.3'9743.1333) PAFFRO TRANSIT DIvNON SOUTH BASE T3XPAN98311 OPVEI,OPTEENT PROJECT ------ STORMWATER OVERALL PLAN C5.06a Instrument Number: 20210709002625 Document:COV Rec: $177.50 Page -20 of 75 Record Datc:7/9/2021 5:01 PM King County, WA :TENTION FLOW TOR MANHOLE. RISER PLAN VIEW MANH<XEV.ANC. ND MN( SPE NOTCH WEIR STEPS OR LADDER PER KCR@CS FGG. 7.006 -- {DIATI It. S. SHEET C5.08). FIRE SUPPORT — A" (IN) x C};75 (LN) ALUMINUM, OR // dl Nix 0.079". /IN) STEEL (SEE NO: L._ WOTH 6.00x:FNP}/ Eo: MARKED "DRAIN' ALE FLOW RESTRICTOR DIMENSIONS ITEM DESCRIPTION DIMENSION IAMETER ORIFICE ELEVATION INVERT ELEVATION RISER TOP ELEVATION OUTSIDE TOP OF VAULT DEPTH TO TOP OF` TOP S OARD DE SPEAVR G.AT - &'(INjMIN. OFAM. OUR MORTAR (TYP.) ... PLOW RE TRICTOR RESTRICT -OR PLATE WT'A ORIFICE _.., (SAE NOTE 6j SECTION (A) IFC SET DETENTION FLOW RESTRICTOR DETAIL SCALE; NTS C2.4k5, C2.06 mif kTECH NOTCH W IR DETAIL ADJUSTABLE LOCK HOOK WITH LOCK SCREW T' ((N) DAM. ROD OR TUBING \�I LEVEL UN ;SEE NOTE ?) LIFT HANDLE AITTACHMENT- MAXIMUM OPENING 12" y" IN) ROAD ON (6 a,s- (INJ BOLT CIRC) LIFT HANDLE, FRONT SIDE SHEAR GATE DETAILS ME"TR0 SRA 4S T[1VE$ OR SOUTH BASE WANDA:kW DEVELOPMENT PROAEC'T STORMWATER OVERALL_ PLAN 03 JULY 2019 C5.06b Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -21 of 75 Record Date:7/9/2021 5:01 PM King County, WA DonnSign Envelope ID: 778D21E5-1.50D-49D8-8A2D-80796C937CCE Exhibit C Appendix G: Operations and Maintenance Manual KING COUNTY Metro Transit Department City of Tukwila South Interim Base Improvements Unclassified Use Permit #L18-0100; Public Works Permit #PW19-0047 Prepared By TETRA TEC 1420 51, Averdie Suite 650 Se,a't.t1e, 'VVushRr3gton 98101 +1..200.883.9300 26 May 202.1 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-22 of 75 Record Date:7/9/2021 5:01 PM King County, WA Dont, Sign Envelope ID: 778021E5-150D-49138-8A2D-80996C937CCE CONTENTS 1.0 INTRODUCTION 3 1.1 General 3 1.2 Site Description 3 2.0 STORMWATER INFRASTRUCTURE MAINTENANCE 4 2.1 KCSWDM Facilities 4 No. 3 — Detention Tanks and Vaults 4 No. 4 — Control Structure/Flow Restrictor 6 No. 5 — Catch Basins and Manholes 9 No. 6 — Conveyance Pipes and Ditches 11 No. 8 — Energy Dissipators..... ........... .............................. ............. 12 No. 9 — Fencing 13 No. 10 — Gates/Bollards/Access Barriers 14 No. 11 -- Grounds (Landscaping) 15 No. 24 — Catch Basin Insert 16 No. 33 — Rock Pad BMP 17 2.2 Proprietary Facilities 18 Contech Filterra 18 3.0 STORMWATER POLLUTION PREVENTION BMPS 18 3.1 KC Storrnwater Pollution Prevention BMPs 19 A-1: Required Best Management Practices for at Properties with Commercial Activities 19 A-2: Outdoor Storage of Liquid Materials in Stationary Tanks 20 A-3: Storage of Liquid Materials in Portable Containers ...... ...... ............ .............. . ....... 21 A-11: Cleaning or Washing of Tools and Equipment 22 A-15: Pressure Washing of Buildings, Rooftops, and Other Large Objects 23 A-18: Vehicle and Equipment Repair and Maintenance, 24 A-22: Painting, Finishing, and Coating of Vehicles, Products and Equipment 25 A-26: Landscaping Activities and Vegetation Management ....... ............ . ............ ....... ...... 26 A-31: Vehicle and Equipment Parking and Storage 27 A-32: Sidewalk Maintenance 28 A-39: Roof Vents and Fugitive Emissions.. ...... ....... ............ ............ . ......... . ........... ...... 29 A-40: Street Deicing Operations 30 A-41: Wheel Wash and Tire Bath Track Out Control 31 A-42: Potable Water Line Flushing, Water Tank Maintenance and Hydrant Testing 32 A-45: Maintenance of Public and Private Utility Corridors and Facilities 33 APPENDIX G1 — PROJECT MAPS . 34 APPENDIX G2 — PROPRIETARY MAINTENANCE MANUALS.........................................................37 APPENDIX G3 — INSPECTION LOG WORKSHEET 55 Technical Ilaformation Report May 202 Basa Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-23 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID: 778D21E5-150D-49D8-8A2D-B0996C937CCE ti GENERAL This Operations and Maintenance (O&M) Manual has been prepared as part of the Full Drainage Review Technical Information Report (TIR) for the South Interim Base Expansion Development Project in Tukwila, Washington. This project employs a variety of stormwater infrastructure that requires regular inspection and maintenance. These features include catch basins, conveyance pipes and ditches, and a Contech Filterra -facility. King County Metro Transit Department shall be the responsible party and a copy of the maintenance manual shall be retained by the appropriate department onsite or within reasonable access to the site. A log of maintenance activity shall be kept and be available for inspection. Quarterly inspections should take place in January, May, August, and November. The best time for an annual inspection is in the late summer, preferably in August to coincide with the 3quarterly inspection. Items marked "After Major Storm Event" should use 1 -inch of precipitation in a 24-hour time window as a guideline. 1.2 SITE DESCRIPTION This project will expand the capacity of the existing King County Metro Transit Department South Base by constructing an interim base on the parcel directly south of the existing transit base. Under developed conditions this property wit feature two new buildings: an operations building in the northeastern corner of the property and a vehicle maintenance building in the southeast corner. The majority of the remaining site area will be paved to allow for bus coach parking, circulation, and maintenance. As a result, much of the stormwater infrastructure requiring maintenance will be located below grade. The site has two Threshold Discharge Areas (TDAs), each of which corresponds to a separate stormwater discharge location. The area of the site draining to the eastern discharge point is known as TDA 1, while the area draining to the west is known as TDA 2. These areas are delineated in Appendix G1 — Project Maps. In the proposed condition, TDA 1 will provide water quality treatment and oil control. Both water quality treatment and oil control will be provided using Contech Filterra facilities. TDA 2 will provide detention using modular chamber technology. As is the case in TDA 1, TDA 2 wit also provide water quality treatment and oil control via Contech Filterra facilities. Ted-inIcal lInformation Report May 20211, Sx::th Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-24 of 75 Record Date:7/9/2021 5:01 PM King County, WA Donn.Sign Envelope ID: 778021E5-150D-49D8-8A2D-B0906C937CCE Maintenance and operation of all stormwater features is the responsibility of the property owner. All flow control, conveyance, and water quality .facilities must be maintained and operated in accordance with the maintenance standards discussed below. On-site facilities are divided into two types: (1) those facilities whose maintenance requirements are specified in the King County Surface Water Design Manual (KCSWDM), and (2) proprietary facilities whose maintenance requirements are specified by the manufacturer. This section is divided to distinguish between the infrastructure types. 2.1 KCSWD FACILITIES All KCSWDM facilities are numbered and denoted as they appear in Appendix A of the KCSWDM. The appendix can be found at the following web address: htt2s:/,, you r.kitliapa Linty .clavidinspilibracilvvater-a nd-landistormwaterisurface-w ate r -d esizap-- n 1/Arlpg.nci ix A FtlNAIL 10 201 h'.pdf No. 3 - Detention 'Tanks and Vaults Maintenance Component Site Defect or Problem Condition When Maintenance is Needed Results Expected when Maintenance is Performed Trash and debris Any trash and debris which exceed 1 cubic foot Trash and debris cleared from site. per 1,000 square feet (this is about equal to the amount of trash it would take to fill up one standard size office garbage can). In general, there should be no visual evidence of dumping., Any noxious or nuisance vegetation which may constitute a hazard to County personnel or the public. Noxious weeds Contaminants and Any evidence of contaminants or pollution such pollution as oil, gasoline, concrete slurries or paint. Grassigroundcover Grass or groundcover exceeds 18 inches in height. Tank or Vault Trash and debris Any trash and debris accumulated in vault or Storage Area tank (includes floalables and non-floatables). Sediment Accumulated sediment depth exceeds 10% of accumulation the diameter of the storage area for 'A length of area, 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 % length of tank, Noxious and nuisance vegetation removed according to applicable regulations. No danger of noxious vegetation where County personnel or the public might normally be. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Grass or groundcover mowed to a height no greater than 6 inches. No trash or debris in vault. All sediment removed from sto Technical bran-eat:ken Report South eteepre ge May 2021 4 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-25 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope la 778D21E5-150D-49D8-8A2D-B0996C937CC,E Tank Structure Vault Structure Inlet/Outlet Pipes Plugged air vent Tank bent out of shape Gaps between sections, damaged joints or cracks or tears in wall Damage to wall, frame, bottom, and/or top slab Sediment accumulation Trash and debris Damaged Access Cover/lid not in Manhole, place Locking mechanism not working Cover/lid difficult to remove Ladder rungs unsafe Large access Damaged or difficult doors/plate to open Gaps, doesn't cover completely Lifting Rings missin rusted N. Any blockage of the vent. Any part of tank/pipe is bent out of shape more than 1O% of its design shape. A gap wider than 'A -inch at the joint of any tank sections or any evidence of soil particles entering the tank at a joint or through a wall. Cracks wider than 4 -inch, any evidence of soil entering the structure through cracks or qualified inspection personnel determines that the vault is not structurally sound. Sediment filling 20% or more of the pipe. Trash and debris accumulated in inlet/outlet pipes (includes floatables and non-floatables). Cracks wider than 1/2 -inch at the joint of the inlet'outlet pipes or any evidence of soil entering at the joints of the inlet/outlet pipes. Cover/lid is missing or only partially in place. Any open manhole requires immediate maintenance. Mechanism cannot be opened by one maintenance person with proper tools. Bolts cannot be seated. Self-locking coverilid does not work. One maintenance person cannot remove cover/lid after applying 80 lbs of lift Missing rungs, misalignment, rust, or cracks. Large access doors or plates cannot be opened/removed using normal equipment. Large access doors not flat and/or access opening not completely covered. Lifting rings not capable of lifting weight of door ----rmey Tank or vault freely vents. Tank repaired or replaced to design. No water or soil entering tank through joints or walls. Vault is sealed and structurally sound. nlet/outlet pipes clear of sediment. No trash or debris in pipes. No cracks more than 14, -inch wide at the joint of the inlet/outlet pipe. Manhole access covered. Mechanism opens with proper tools. Cover/lid can be removed and reinstalled by one maintenance person. Ladder meets design standards. Allows maintenance person safe access. Replace or repair access door so it can opened as designed. Doors close flat: covers access opening completely. Lifting rings sufficient to lift or remove dooror e Ted-wet:al information Report May 202 tl Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-26 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope la 778021E5-150D-40D8-8A2D-B0996C937CCE No,. 4 - Control Structure/Flow Restrictor The control structure is crucial to managing stormwater discharge rates. A control structure that is not functioning correctly can lead to flooding upstream and downstream of the structure. The control structure should be inspected annually, and the appropriate corrective actions should be taken immediately if a defect is noted. REst c Maintenance Defect or Problem Condition When Maintenance is Needed Component Structure Trash and debris Trash or debris of more than li2 cubic foot which is located immediately in front of the structure opening or is blocking capacity of the structure by more than 10%. Trash or debris in the structure that exceeds 1/3 the depth from the bottom of basin to invert the lowest pipe into or out of the basin. Deposits of garbage exceeding 1 cubic foot in volume. Sediment Sediment exceeds 60% of the depth from the bottom of the structure to the invert of the lowest pipe into 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 out of the structure or the bottom of the FROP-T section. Damage to frame Corner of frame extends more than 3/4 inch anclior top slab past curb face into the street (If applicable). Top slab has holes larger than 2 square inches or cracks wider than 114 inch. Frame not sitting flush ori top slab, i.e., separation of more than 314 kith of the frame from the top slab.. Cracks in walls or Cracks wider than t/2 inch and longer than 3 bottom feet, any evidence of soil particles entering structure through cracks, or maintenance person judges that structure is unsound.. Cracks wider than V2 inch and longer than 1 foot at the joint of any inletloutlet pipe or any evidence of soil particles entering structure through cracks. Settlement/ Structure has settled more than 1 inch or has misalignment rotated more than 2 inches out of±=eLiL Technical li3forrrlauorl Report SeLple teoeire Results Expected when Maintenance is Performed No Trash or debris blocking or potentially blocking entrance to structure.. No trash or debris in the structure. No condition present which would attract or support the breeding of insects or rodents. Sump of structure contains no sediment. Frame is even with curb. Top slab is free of holes and cracks Frame is sitting flush on top slab. Structure is sealed and structurally sound. No cracks more than 114 inch wide at the joint of inlet/outlet pipe. Basin replaced or repaired to design standards. May 202i Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-27 of 75 Record Date:7/9/2021 5:01 PM King County, WA DonnSign Envelope 10: 778021E5-1500-4908-8A2D-6099613937CCE 111 ,111111:11:1:11111:111611111111,11;11111,11,A '1446W "1-11111:1:1-"" Maintenance Defect or Problem Component Structure Damaged pipe joints Contaminants and pollution Ladder rungs missing or unsafe FROP-T Damage Section Cleanout Gate Darnaged or 'missing Orifice Plate Damaged or missing Obstructions Overflow Pipe Obstructions Deformed or damaged lip Inlet/Outlet Sediment accumulation Technjcal hforinatkin Report Condition When Maintenance is Needed Cracks wider than 1/2 -inch at the joint of the inlet/outlet pipes or any evidence of soil entering the structure at the joint of the inlet/outlet pipes. Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Ladder is unsafe due to missing rungs, misalignment, rust, cracks, or sharp edges. T section is not securely attached to structure wall and outlet pipe structure should support at least 1,000 lbs of up or down pressure. Structure is not in upright position (allow up to 10% from plumb). Connections to outlet pipe are not watertight or show signs of deteriorated grout. Any holes—other than designed holes—in the structure. Cleanout gate is missing. Cleanout gate is not watertight. Gate cannot be moved up and down by one maintenance person. Chain/rod leading to gate is missing or damaged. Control device is not working properly due to missing, out of place, or bent orifice plate. Any trash, debris, sediment, or vegetation blocking the plate. Any trash or debris blocking (or having the potential of blocking) the overflow pipe. Lip of overflow pipe is bent or deformed.. Sediment filling 20% or more of the pipe. 1 Results Expected when Maintenance is Performed No cracks more than 1/4 -inch wide at the joint of inlet/outlet pipes. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Ladder meets design standards and allows maintenance person safe access. T section securely attached to wall and outlet pipe. u lure in correct position. Connections to outlet pipe are water tight; structure repaired or replaced and works as designed. Structure has no holes other than designed holes. Replace cleanout gate. Gate is watertight and works as designed. Gate moves up and down easily and is watertight Chain is in place and works as designed. Plate is in place and works as designed. Plate is free of all obstructions and works as designed. Pipe is free of all obstructions and works as designed. Overflow pipe does not allow overflow at an elevation lower than design Inlet/outlet pipes clear of sediment. May 202 tl Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -28 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID: 778D21E5:1 50D-49.08-8A2D-E0996C937CCE Maintenance Component Metal Grates (If Applicable.) Defect or Problem Trash and debris Damaged Unsafe grate opening Trash and debris Damaged or missing Manhole Coverilid not in Cover/Lid place Locking mechanism Not Working Cover/lid difficult to Remove Technical 1.Iforniation Report SoutIt ' OTROliViVri$100ttlitEiFtiOlVitiRieS Condition When Maintenance is Needed Trash and debris accumulated in inlet/outlet pipes (includes floatables and non-floatables). Cracks wider than 1/2 -inch at the joint of the inlet/outlet pipes or any evidence of soil entering at the joints of the inlet/outlet pipes. Grate with opening wider than 7/8 inch. Trash and debris that is blocking more than 20% of grate surface. Grate missing or broken member(s) of the grate. ` Cover/lid is missing or only partially in place. Any open structure requires urgent maintenance. Mechanism cannot be opened by one maintenance person with proper tools. Bolts cannot be seated. Self-locking cover/lid does not work. One maintenance person cannot remove cover/lid after applying 80 lbs. of lift. Results Expected when Maintenance is Performed No trash or debris in pipes. No cracks more than1/4-inch wide at the joint of the inletfoutlet pipe. Grate opening meets design standards. Grate free of trash and debris. footnote to guidelines for disposal Grate is in place and meets design standards. Cover/lid protects opening to structure. Mechanism opens with proper tools. Cover/lid can be removed and reinstalled by one maintenance person. May 202i Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-29 of 75 Record Date:7/9/2021 5:01 PM King County, WA DomSign Envelope ID: .778D21E5-150D-49D8-3A2D-B0996C937CCE No. 5 - Catch Basins and Manholes Stormwater catch basins and manholes should be inspected annually to check for sediment and debris accumulation, damage to pipe inlets arid outlets, and other items listed in the facility maintenance section. Maintenance Component Structure Sediment :„.§9110011,,;;ZT Defect or Problem Condition When Maintenance is Needed Results Expected when Maintenance is Performed Trash and debris Sediment exceeds 60% of the depth from the bottom of the catch basin to the invert 0/ 175 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 or debris of more than 72 cubic foot which is located immediately in front of the catch basin opening or is blocking capacity of the catch basin by more than 10%. Trash or debris in the catch basin that exceeds No trash or debris in the catch basin. 113 the depth from the bottom of basin to invert the lowest pipe into or out of the basin.. Sump of catch hasin contains no sediment. No Trash or debris blocking or potentially blocking entrance to catch basin. Dead animals or vegetation that could generate odors that could cause complaints or dangerous gases (e.g., methane}. Deposits of garbage exceeding 1 cubic foot in volume. Damage to frame Corner of frame extends more than 2/4 inch andior top slab past curb face into the street (If applicable). Top slab has holes larger than 2 square inches or cracks wider than 1/4 inch. Frame not sitting flush on top slab, i.e., separation of more than 3/4 inch of the frame from the top slab. Cracks in walls or Cracks wider than 1/2 inch and longer than 3 bottom feet, any evidence of soil particles entering catch hasin through cracks, or maintenance person judges that catch basin is unsound. Cracks wider than 1/2 inch and longer than 1 No cracks more than 1)4 inch wide at foot at the joint of any inletioutlet pipe or any the joint of inletfoutlet pipe„ evidence of sol particles entering catch basin through cracks„ Technical tlniormation Report No dead animals or vegetation present within catch basin. No condition present which would attract or support the breeding of insects or rodents. Frame is even with curb. Top slab is free of holes and cracks. Frame is sitting flush on top slab. Catch basin is sealed and is structurally sound. May 2021 Instrument Number: 20210709002625 Documcnt:COV Rcc: $177.50 Page -30 of 75 Record Date:7/9/2021 5:01 PM King County, WA DecuSign Envelope ID: 778621E5-150D-49D8-8A2D-B0996C937 CCE Maintenance Defect or Problem Condition When Maintenance is Needed Component Structure Settlement/ misalignment Inlet!Outlet Pipe Metal Grates (Catch Basins) Damaged pipe joints Contaminants and pollution Sediment accumulation Trash and debris Damaged Unsafe grate opening Trash and debris Damaged or missing Manhole Coverllid not in Cover/Lid place Locking mechanism Not Working Coverllid Remove Catch basin has settled more than 1 inch or has rotated more than 2 inches out of alignment. Cracks wider than I/, -inch at the joint of the inletioutlet pipes or any evidence of soil entering the catch basin at the joint of the inlet/outlet pipes. Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Sediment filling 20% or more of the pipe. Trash and debris accumulated in inletroutlet pipes (includes foatables and non-floatables). Cracks wider than 1/2 -inch at the joint of the inletboutlet pipes or any evidence of soil entering at the joints of the inlet/outlet pipes. Grate with opening wider than 7h inch. Trash and debris that is blocking more than 20% of grate surface.. Grate missing or broken member(s) of the grate. Any open structure requires urgent maintenance. Coverllid is missing or only partially in place. Any open structure requires urgent maintenance. Mechanism cannot be opened by one maintenance person with proper tools. Bolts cannot be seated. Self-locking cover/lid does not work. ifficult to One maintenance person cannot remove cover/lid after applying 80 lbs. of lift i eclhnjcal liufoirrt'autiour Report. Results Expected when Maintenance is Performed Basin replaced or repaired to design standards. No cracks more than •74 -inch wide a the joint of inlet/outlet pipes. Materials removed and disposed of according to applicable regulations. Source control BMPs implernented if appropriate. No contaminants present other than a surface oil film. Inlet/outlet pipes dear of sediment. No trash or debris in pipes. No cracks more than 'l, -inch wide at the joint of the inlet/outlet pipe. Grate opening meets design standards. Grate free of trash and debris. footnote to guidelines for disposal Grate is in place and meets design standards. Coverllid protects opening to structure. ;hanisrn opens with proper tools. Coverllid can be removed and reinstalled by one maintenance person. May 202V Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-31 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope 10: 778021E5-1500-4908-8A20-B0996C937CCE 0. 6 — Conveyanc pes and Ditches Conveyance pipes and ditches should be inspected annually and following heavy rain events. Maintenance Component Defect or Problem Pipes Sediment & debris accumulation Vegetation/roots Contaminants and pollution Damage to protective coating or corrosion Damaged Ditches Trash and debris Sediment accumulation Noxious weeds --"!,,,,i0ONNOYAN00;01Pti Condition When Maintenance is Needed Results Expected when Maintenance is Performed Accumulated sediment or debris that exceeds 20% of the diameter of the pipe„ Vegetation/roots that reduce free movement of water through pipes. Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Protective coating is damaged; rust or corrosion is weakening the structural integrity of any part of pipe. Any dent that decreases the cross section area of pipe by more than 20% or is determined to have weakened structural integrity of the pipe. Trash and debris exceeds 1 cubic foot per 1,000 square feet of ditch and slopes. • Accumulated sediment that exceeds 20% of the design depth. Any noxious or nuisance vegetation which may constitute a hazard to County personnel or the public. Contaminants and Any evidence of contaminants or pollution pollution such as oil, gasoline, concrete slurries or paint. Vegetation Erosion damage to slopes Rock lining out of place or missing (If Applicable') Ted-wet:al hforleeatiten Report South eteepre Vegetation that reduces free movement of water through ditches. Any erosion observed on a ditch slope. One layer or less of rock exists above native soil area 5 square feet or more, any exposed native soil. Water flows freely through pipes. Water tows freely through pipes. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Pipe repaired or replaced. Pipe repaired or replaced. Trash and debris cleared from ditches. Ditch cleaned/flushed of all sediment and debris so that it matches design. Noxious and nuisance vegetation removed according to applicable regulations. No danger of noxious vegetation where County personnel or the public might normally be. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Water flows freely through ditches. Slopes are not eroding. Replace rocks to design standards. May 202 tl Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-32 of 75 Record Date:7/9/2021 5:01 PM King County, WA DonnSign Envelope 10: 7781321 E5-150D-49D8-8.4.2D-E0996C937CCE No. 8 — Energy Dissipators Maintenance Component Site 11 Defect or Problem Trash and debris Contaminants and pollution Rock Pad Missing or moved rock Dispersion Pipe plugged with Trench sediment Not discharging water properly Gabions . „ . Manhole/ Chamber Perforations plugged Water flows out top of "distributor" catch basin Receiving area over -saturated Damaged mesh Corrosion Collapsed or deformed baskets Missing rock . . Worn or damaged post, baffles or side of chamber Damage to wall, frame, bottom, and/or top slab Damaged pipe joints .rertwocal linforrnaoon Report Hoph lee ve Rye 0Y All!itiY10801 Condition When Maintenance is Needed Trash and/or debris accumulation. Any evidence of contaminants or pollution such as oil, gasoline, concrete slurries or paint. Only one layer of rock exists above native soil in area five square feet or larger or any exposure of native soil. Accumulated sediment that exceeds 20% of the design depth. Visual evidence of water discharging at concentrated points along trench (normal condition is a "sheet flow" of water along trench Over 1/4 of perforations in pipe are plugged with debris or sediment. Water flows out of distributor catch basin during any storm less than the design storm, Water in receiving area is causing or has potential of causing landslide problems. Mesh of gabion broken, twisted or deformed so structure is weakened or rock may fall out. Gabion mesh shows corrosion through more than "1/4 of its gage. Gabion basket shape deformed due to any cause. Any rock missing that could cause gabion to loose structural integrity. Structure dissipating flow deteriorates to 1/2 or original size or any concentrated wom spot exceeding one square foot which would make structure unsound Cracks wider than 1/2 -inch or any evidence of soil entering the structure through cracks, or maintenance inspection personnel determines that the structure is not structurally sound. Cracks wider than 1/2 -inch at the joint of the inlet/outlet pipes or any evidence of soil entering the structure at the joint of the inlet/outlet t. es Results Expected when Maintenance is Performed Dissipater clear of trash andior debris. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Rock pad prevents erosion. Pipe cleaned/flushed so that it matches design. Water discharges from feature by sheet flow. Perforations freely discharge flow. No flow discharges from distributor catch basin, No danger of landslides. Mesh is intact, no rock missing All gabion mesh capable of containing rock and retaining designed form. All gabion baskets intact, structure stands as designed. No rock missing. Structure is in no danger of failing. Manhole/chamber is sealed and structurally sound. No soil or water enters and no water discharges at the joint of inlet/outlet pipes.. May 202 I ; Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-33 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID: 778D21E5-1501).-49D8-8A2D-BC)996C037CCE No. 9 — FenOing Fencing should be inspected annually. Maintenance Defect or Problem Component Site Wood Posts, Missing or Boards and damaged parts Cross Members Erosion or holes under fence Metal Posts. Rails and Fabric Weakened by rotting or insects Damaged or failed post foundation Damaged parts Deteriorated paint or protective coating Openings in fabric Ted-wet:al Le'forleeatiteri Report South eteetort: [ PENCI 55 Condition When Maintenance is Needed Erosion or holes more than 4 inches high and 12- 18 inches wide permitting access through an opening under a fence. Missing or broken boards, post out of plumh by more than 6 inches or cross members broken Any part showing structural deterioration due to rotting or insect damage Concrete or metal attachments deteriorated or unable to support posts. Post out of plumb more than 6 inches. Top rails bent more than 6 inches. Any part of fence (including post, top rails, and fabric) more than 1 foot out of design alignment. Missing or loose, tension wire. Part or parts that have a rusting or scaling condition that has affected structural adequacy. Openings in fabric are such that an 8 -inch diameter ball could fit through. 1 Results Expected when Maintenance is Performed No access under the fence. No gaps on fence due to missing or broken boards, post plumb to within 11/2 inches, cross members sound. All parts of fence are structurally sound. Post foundation capable of supporting posts even in strong wind. Post plumb to within 11/2 inches. Top rail free of bends greater than 1 inch. Fence is aligned and meets design standards. Tension wire in place and holding fabric. Structurally adequate posts or parts with a uniform protective: coating. Fabric mesh openings within 50% of grid size. May 202 tl 3 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-34 of 75 Record Date:7/9/2021 5:01 PM King County, WA DonnSign Envelope ID: 778D21E5-1.50D-49D8-8A2D-E30996C937CCE No. 10 ,- Gates./Boqards/Access Barriers Gates, bollards, and access barriers should be inspected annually unless security concerns necessitate more frequent inspections. ',11011; gss OAR:, Maintenance Defect or Problem Condition When Maintenance is Needed Component • Chain Link Damaged or Missing gate. Fencing Gate missing members Broken or rnissing hinges such that gate cannot be easily opened and closed by a maintenance person. Bar )ate Locking mechanism does not lock gate Openings in fabric Damaged or missing cross bar Locking mechanism does not lock gate Support post damaged Bollards Damaged or missing Boulders Does not lock Gate is out of plumb more than 6 inches and more than 1 foot out of design alignment. Missing stretcher bar, stretcher bands, and ties. Locking device missing, no -functioning or does not link to at parts. Openings in fabric are such that an 8 -inch diameter ball could fit through. Cross bar does not swing open or closed, is missing or is bent to where it does not prevent vehicle access. Lacking device rnissing, no -functioning or does not link to all parts. Support post does not hold cross bar up. Bollard broken, missing, does not 61into support hole or hinge broken or missing. Locking assembly or lock missing or cannot be attached to lock bollard in place. Dislodged Boulders not located to prevent motorized vehicle access. Circumvented Ted-wet:al hforleeatiten Report South 1,11DD.:ii'n Motorized vehicles going around or between boulders. Results Expected when Maintenance is Performed Gates in place. Hinges intact and lubed. Gate is working freely. Gate is aligned and vertical. Stretcher bar, hands, and ties in place. Locking mechanism prevents opening of gate. Fabric mesh openings within 50% of grid size. Cross bar swings fully open and closed and prevents vehicle access. Locking mechanism prevents opening of gate. Cross bar held up preventing vehicle access into facility. No access for motorized vehicles to get into facility. No access for motorized vehicles to get into facility. No access for motorized vehicles to get into facility. No access for motorized vehicles to get into facility. May 202 tl [ 4 Instrument Number: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-35 of 75 Record Date:7/9/2021 5:01 PM King County, WA DonnSign Envelope ID: 778D21E5-150D-4908-8A2D-130996C937CCE No. 11 ,- Grounds (Landscapnig) Landscaping areas should be inspected at least once per month. Inspection frequency should increase to weekly in extreme weather events (Le, heat waves, heavy rain events, etc.). „.,. Maintenance Defect or Problem Condition When Maintenance is Needed Component Site Trash or litter Noxious Needs Any trash and debris which exceed 1 cubic foot per 1,000 square feet (this is about equal to the amount of trash it would take to fill up one standard size office garbage can). In general, there should be no visual evidence of dumping. Any noxious or nuisance vegetation which may constitute a hazard to County personnel or the public. Contaminants and Any evidence of contaminants or pollution pollution such as oil, gasoline, concrete slurries or paint. Grass/groundcover Grass or groundcover exceeds 18 inches in height. Trees and Hazard Any tree or limb of a tree identified as having Shrubs a potential to fall and cause property damage Damaged Technical Information Report S EriLefirr, or threaten human life. A hazard tree identified by a qualified arborist must be removed as soon as possible. 5 Results Expected when Maintenance is Performed Trash and debris cleared from site. Noxious and nuisance vegetation removed according to applicable regulations. No danger of noxious vegetation where County personnel or the public might normally be. Materials removed and disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surface oil film. Grass or groundcover mowed to a height no greater than 6 inches, No hazard trees in facility. Limbs or parts of trees or shrubs that are split Trees and shrubs with less than 5% of or broken which affect more than 25% of the total foliage with split or broken limbs. total foliage of the tree or shrub. Trees or shrubs that have been blown down or knocked over.. Trees or shrubs which are not adequately supported or are leaning over. causing exposure of the roots. No blown down vegetation or knocked over vegetation. Trees or shrubs free of injury. Tree or shrub in place and adequately supported; dead or diseased trees removed. flay 2021 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-36 of 75 Record Datc:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID: 778D2 IE5-150D-4908-8A2D-B0996C937CCE No. 24 — Cato asin insert Catch basin inserts should be inspected at the time of catch basin and manhole inspections. Maintenance Component Si SE Defect or Problem Condition When Maintenance is Needed Media Insert Visible Oil Insert does not fit catch basin properly Filter media plugged Oil absorbent media saturated Water saturated Service life exceeded Seasonal maintenance Visible oil sheen passing through media Flow gets into catch basin without going through media. Filter media plugged. Media oil saturated. Catch basin insert is .saturated with water, which no longer has the capacity to absorb.. Regular interval replacement due to typical average life of media insert product, typically one month. When storms occur and during the wet season. 1 , Results Expected when Maintenance is Performed Media inset replawd. All flow goes through media. Flow through filter media is normal. Oil absorbent media replaced. Insert replaced. Media replaced at manufacturers recommended interval. Remove, clean and replace or install new insert after major storms, monthly during the wet season or at manufacturer's recommended interval. rethink:al riforreation Report May 202 tl i likS 6 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -37 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID: 778D21E5-1500-49D8-8A2D-B09%C937 :CE No. 33 _ Rock Pad Maintenance Component Site Defect or Problem Trash and debris Rock Pad Area Rock pad size Vegetation Rock Exposed soil Inspection Frequency e dr 3 .l Wnfoirrnati . n Report Duch Condition When Maintenance is Needed Results Expected when Maintenance is Performed Trash and debris accumulated on rock pad Rock pad site free of any trash or site. debris. Rock pad is not 2 feet by 3 feet by 6 inches Rock pad is 2 feet by 3 feet by 6 Inches thick or as designed. thick or as designed. Vegetation is seen growing in or through rock No vegetation within rock pad area. pad. Soil can be seen through the rock pad. Full thickness of the rock pad is in place, no sod visible through rock pad. Rock pad is functioning normally. Annually and after large storms. May 202 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -38 of 75 Record Date:7/9/2021 5:01 PM King County, WA DomSign Envelope 10: 778021E5-15013-4908.4A20-E0996C937CCE 2.2 PROP !ETA* FACLITIES Contech Filterra The Filterra unit should be inspected every six (6) months. If deficiencies are noted, maintenance shall be performed within two (2) weeks of the inspection date, or, if the deficiencies involve the structure itself, both Contech and the City of Tukwila should be notified immediately. Further information and the maintenance procedure are available in Appendix' G2 Proprietary Maintenance Manuals. Site operations and maintenance must include measures 10 protect the quality of stormwater, surface water, and groundwater. Best Management Practices (BMPs) are required by King County Code 9.12 and shall be implemented in accordance with the King County Stormwater Pollution Prevention Manual (KCSPPM). If the BMPs included here are not enough to prevent contamination of stormwater, additional measures will be required. This section includes required BMPs, required routine maintenance, and supplemental BMPs. Stormwater pollution and prevention management strategies are numbered and denoted as they appear in Chapter 3 of the KCSPPM. The full text can be found at the following web address: https:Uvour.kinarxturthLgovitincLil?raryivvater-rand-landistormwater/storrnwater-ookition-prevention- rnantrall2016 Storrnwer Pollution Prevent IVianual.pdf Tothinical kformation Report 55p2t15 E52,22 May 2021 Instrument Number: 20210709002625 Documcnt:COV Rcc: $177.50 Page -39 of 75 Record Date:7/9/2021 5:01 PM King County, WA DoneSign Envelope ID'. 778D21E5-150D-49D8-8A2D-B0955C937CCE 3.1 KC STORMWATER PO UT OlN PREVENTION MPS Al:..Required Best Management Practices for all Properties with CoiKrtmerclal Activities The following Best Management Practices (BMPs) are required for all commercial, industrial, agricultural, public, or residential properties with cornmerc'ial activities in unincorporated King County. Clean and Maintain Storm Drainage System Label All Storm Drain Inlets on Your Property Eliminate Illicit Connections to the Storm Drainage System Evaluate the condition of the catch basin by checking the amount of sediment in the bottom of the sump. Catch basins must be cleaned out when the solids, trash_ and debris in the sump reaches one—half of the depth between the bottom of the sump and the bottom of the lowest inflow or outflow pipe connected to the catch basin or is at least 6 inches below this point. Hire a professional drainage contractor to inspect and maintain your system or clean the system yourself. If there is sediment or other debris in the drainage pipes, then a professional contractor must he hired to flush or jet out the pipes Small amounts of floating oil can be soaked up with oil absorbent pads, bagged and disposed of as solid waste. Up to one cubic yard of nonhazardous solid material may be disposed of as solid waste in your regular garbage. If you exceed this threshold hire a professional drainage contractor. All of the solids and stagnant water collected from catch basin sumps must be disposed of properly. None of the sump contents can be flushed into the catch basin outflow pipe. Depending on the nature of the pollutants in the sump, and the associated types of activities taking place on the site, the sump contents may need to be handled as contaminated waste. Contractors who perform catch basin clean—out services are required to follow appropriate disposal requirements. Clean and maintain catch basins annually. Sites with activities generating a lot of sediments and other debris will have to inspect and clean out their catch basins more often. Frequent sweeping of paved parking and storage areas will save time and money in maintaining the drainage system. Other components of drainage systems such as ponds, tanks, and bioswales must also be maintained. If this maintenance is beyond your ability, contractors are available to complete this work. Stencil or apply storm drain markers adjacent to storm drains to help prevent the improper disposal of pollutants. If the storm drain grate is stamped with warnings against polluting. then additional marking may riot he required if there is no evidence of pollutants being dumped or washed into the storm drain. Connections to the storm drainage system that convey substances other than stormwater are prohibited. Examples are connections from intemal floor drains, HVAC systems, industrial processes, sinks, and toilets. Illicit connections must be immediately removed. permanently plugged or re—plumbed. The discharge must be re—plumbed so that it goes to the sanitary sewer, a septic system. an on—site treatment system, or a holding tank for off—site disposal. There are restrictions on what can be disposed of to the sanitary sewer and septic systems. You may be required to do additional investigation to determine where all stormwater and non—stormwater discharges go. This may Include smoke, dye. and chemical testinor closed-circuit television inspection. Technical Worm.. Report May 202 tl S.Dutl)r, . i, ass,,. 1 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-40 of 75 Record Date:7/9/2021 5:01 PM King County, WA DonnSign Envelope ID: 778D21E5-150D-49D8-8A2D-60996C937CCE A-2: Outdoor Storage of Liquid Materials in Stationary Tanks This activity does not apply to underground storage tanks or to businesses permitted by the Washington Slate Department of Ecology to treat, store, or dispose of dangerous wastes. Storage of reactive, combustible, or flammable liquids must comply with the King County Fire Code Title 17. A Required BMPs Store and contain liquid materials so if the tank leaks, the contents wit not get into the storm drainage system, surface waters, or groundwater. This requires secondary containment or using a double -walled tank. Place small, gravity -fed farm fuel tanks without secondary containment on flat and open ground so that a spill or leak will not run downhill toward creeks, ditches, tiles, or drains before it can be contained and cleaned up. Place tanks on secure bases and stable ground. Install a spill control device (such as an oil/water separator or down -turned elbow) in the catch basins that collect runoff from the storage tank area if the liquid is oil, gas, or other material that separates from and floats on water. Place drip pans or absorbent materials under taps and at at potential drip and spill locations during filling and unloading of tanks and properly dispose of collected liquids and absorbent materials. Turn over or remove empty drip pans when not in use. Have spill control materials/spill kit near the tanks and any liquid transfer areas. Post a spill control plan and keep contact information current. Train all employees on required spill response methods and procedures. Required Routine Sweep and dean paved storage areas as needed. Do not hose down the area to a storm drain. Maintenance Check tanks and sumps regularly for leaks and spills and replace 1compromised. Collect and dispose of at spilled liquids. Inspect spill control devices regularly and remove floating oil and debris. Collect and properly dispose of stormwater that collects in containment areas. 'Technical Information Report ihneein Dane May 2.021 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-41 of 75 Record Date:7/9/2021 5:01 PM King County, WA DonnSign Envelope ID: 778D21E5-150D 49D8 8A2D 80996C937CCE A-3: Storage of Liquid ftnateriais in Portable Containers This activity applies to the outdoor storage of liquids in portable containers and indoor storage where the potential exists to flow outside. 1t1it1111it:11,r1t11i11111t1it1.111111111.„,,,,,:„ Required BMPs 1Place tight—fitting lids on at containers. Enclose or cover the containers. Raise containers off the ground with a spill containment pallet or similar method lo contain the material in the event of a spill or accident. Place drip pans or absorbent materia s under all potential drip and spit locations during filling and unloading of containers. Collected liquids or soiled absorbent materials must be disposed of properly. Do nol use metal drums if the liquid chemicals are corrosive. Label all containers with the product name and hazards.. Have spill control materials/spill kit located nearby. Have a spill control plan with current contact information. Required Routine Train employees on the sites spill plan andior proper spill cleanup procedures. Maintenance Sweep and clean paved storage areas as needed. Do not hose down the area to the storm drainage system. Routinely check containers and any containment sumps for leaks and spills and replace if compromised. Dispose of all spilled liquids properly. Inspect spill control devices routinely and remove oil and debris. Storage of reactive, combustible, or flammable liquids must comply with the King County Fire Code. The local fire district must be consulted for limitations on clearance of roof covers over containers used to store flammable materials.. Technical lnforrnatioo Report Spurr n 111212,a May 2021 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -42 of 75 Record Date:7/9/2021 5:01 PM King County, WA DonnSicgn Envelope ID: 778D21E5-150D-49D8-3A2D-B0996C937CCE A-11: Cleaning rWash'unj of Tools and Equipment This activity includes cleaning landscaping equipment such as lawn mowers and weed whackers; tools used at equipment repair shops; and, manufacturing equipment such as saws, grinders and screens. Required BMP Discharge tool and equipment wash water to the sanitary sewer or a holding tank for offsite disposal. Discharge of wash water to the storm drain system is not allowed without treatment and an Individual Wastewater Discharge permit from the Washington State Department of Ecology. Rinse lawnmowers with water only on a lawn or similar area where grass clippings will not get into the storm drain system or surface waters when it rains. Oily, soapy or otherwise dirty water is not allowed to discharge to any stormwater system or surface !water. 'Focht 11 Ii"ofornlariReport May 202 B South ur w} fete Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -43 of 75 Record Date:7/9/2021 5:01 PM King County, WA DecoSign Envelope ID: 772D21E5-150D-491-38-8A2D-80996C937CCE A15: Pressure Washing of Buildings, Rooftops, and Other Large Objects Required BMPs If the area is paved and soaps, detergents or any other chemical (including pesticides) are used, use a sump pump, wet vacuum or similar device that enables collection of wash water and associated solids so they can be disposed of properly. The wash water must not go to the storm drain system. If the area is paved but soaps and detergents are not being used, the wash water runoff does not have Ito be collected but it does have to be filtered to trap solid materials. The wash water does not need to he collected if the area is landscaped and the water can soak into the ground without running into the storm drain system. If the surface being pressure washed is painted with lead or other heavy metal --bearing paint (such as chromium or cadmium), you must use a commercial pressure washing service that will collect, test, and properly dispose of the wastewater. Block or disconnect at rooftop downspouts when washing roofs. The wash/waste water must be directed to pervious areas such as landscaping or gravel for infiltration, collected and disposed of to the sanitary sewer, or taken off site for appropriate disposal. i ecl"rnInformation Report I21i Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -44 of 75 Record Date:7/9/2021 5:01 PM King County, WA Dom,Sign Envelope ID.. 73D21E5-150D-49D8-.8A2D-809960 937CCE A-18: Velh cie and (Equipment Re air and Maintenance This also applies to mobile vehicle and equipment repair and maintenance operations. 1 Required BMPs Inspect all incoming vehicles and equipment for leaks and use drip pans or absorbent material if necessary, while wafting for service. Clean up any spilled fluids immediately. The collected material and absorbents must be disposed of, reused, or recycled properly. Cover, contain, and label waste oil, antifreeze, and other fluids. Store batteries upright in a secure, contained, covered location (not outside on the ground). Check to ensure batteries are not damaged or leaking. Keep battery acid—neutralizing materials, such as baking soda, available near the storage area. Regular work at stationary locations must be done indoors or in a covered area using a tarp or drip pans beneath the vehicle or equipment to capture all spills and drips. Ensure that employees are familiar with the site's spill control and clean—up plans and are trained in the proper handling, storage, and disposal of all fluids. Store and maintain appropriate spill cleanup materials in an easily accessible location. Required Routine', Inspect parking and outside storage areas daily for leaks and drips. Maintenance Sweep paved work areas as needed. Soak up vehicle fluids with rags or other absorbent material immediately. Never wash paved areas to a storm drain or the street. Supplemental Ahsorbent material such as pillows or booms can be used around storm drains or in catch basins to BMPs !absorb oil and other substances. A catch basin insert may be necessary. Catch basin inserts require frequent m Teel n :al Irrforrrl.:,ruon Report nance to be effective. Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-45 of 75 Record Date:7/9/2021 5:01 PM King County, WA DomSign Envelope ID: .778D21E5-150D-49D8-8A2D-B0996C937CCE A-22: Painting, Finishing, and Coating of Vehdes, roducts and Equipment This includes preparation work such as sanding and blasting.. Painting buildings is covered in Activity A- 29. Painting and other work on vessels is covered in A-30. Required BMPs Enclose all work (unless the work is too large) according to the Puget Sound Clean Air Agency requirements. lApproved paint booths must be in place prior to any vehicle painting. Properly dispose of pint booth filters as required under Dangerous and Hazardous Waste Regulations. Collect dust and debris from sanding operations using vacuum sanders, ground cloths or similar methods. Do not hose down the area to the storm drainage system. Use ground cloths and/or drip pans in outdoor locations where paints, finishes, and other liquid materials are mixed andlor applied. Required Routine Store and maintain appropriate spit cleanup materials in a location known to at. Maintenance ITrain all employees on the sites spill control plan and/or proper spill cleanup procedures. Sweep the area at the end of each day at a minimum. Do not hose down the area to a storm drain. ------- Ted-wet:al bran-eat:ken Report South eteepre May 202l Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-46 of 75 Record Date:7/9/2021 5:01 PM King County, WA DomSign Envelope ID: 778D21E5-150D-49138-8A2D-E0996C937CCE A-26: Landscaping Activities and Vegetation Management 11 Required BMPs Train employees on the proper use and application of fertilizers and pesticides. Never apply pesticides and fertilizers if it is raining or about to rain. Do not apply pesticides within 100 feet of surface waters such as lakes, ponds, wetlands, streams, and stormwater conveyance ditches unless the application is approved and permitted by the Washington State Department of Ecology. Determine the proper fertilizer application for the types of soil and vegetation involved. Follow manufacturers' recommendations and label directions. Clean up any spills immediately. Remove weeds/vegetation in stormwater ditches by hand or other mechanical means and only use chemicals as a last resort. Do not blow vegetation or other debris into the storm drain system, sidewalks, or street. Dispose of collected vegetation by recycling or composting. Use mulch or other erosion control measures when soils are exposed for more than one week during the dry season or two days during the rainy season. Ensure sprinkler systems do not "overspray" vegetated areas resulting in the excess water discharging into the storm drain system. Supplemental Use integrated pest management (IPM); a comprehensive approach to the use of pesticides is the most BMPs effective BMP measure that can he taken for herbicide, insecticide, and fungicide use. Test soils to determine the correct fertilizer application rates. Use, mechanical methods of vegetation removal rather than applying herbicides. Use native plants in landscaping. Native plants do not require extensive fertilizer or pesticide applications. Technjeal Won-eat:ion Report May 2021 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-47 of 75 Record Date:7/9/2021 5:01 PM King County, WA DonnSign Envelope la 778021E5-150D-49D8-8A2D-E6996C937CCE A-31: Vehicle and gulp ent Parking and Storage Required BMPs Sweep parking lots, storage areas, and driveways as needed to collect dirt, waste, and debris. Do not hose down the area to the storm drainage system. Clean up vehicle and equipment fluid drips and spills immediately. Place drip pans below inoperative or leaking vehicles and equipment, including employee vehicles. Collect and discharge wash water to a sanitary sewer or haul for offsite disposal if washing/pressure washing of the parking lot occurs. There are businesses that will clean parking lots and collect water for off—site disposal. Never drain wash water to the storm drainage system. Follow basic sediment controls as outlined in Appendix D ('Erosion and Sediment Control Standards') of the King County Surface Water Design Manual for gravel and dirt lots. These types of parking lots may require additional BMPs to prevent sediment laden water from leaving your site. Supplemental Encourage employees to repair leaking personal vehicles. BMPs Encourage employees to carpool or use public transit through incentives. Encourage customers to use public transit by rewarding valid transit pass holders with discounts. Install catch basin inserts to collect excess sediment and oil if necessary. Inspect arid maintain catch basin inserts to ensure they are working correctly. Ted-wet:al hformation Report May 2021i South eteepre 27 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-48 of 75 Record Datc:7/9/2021 5:01 PM King County, WA DomSign Envelope la 778D21E5-150D-4908-8A2D-B0996C937CCE A-32: Sidewalk Maintenance Required BMPs Sweep sidewalks as needed to collect loose dirt and debris rather than blowing or pushing it into the street or gutter or hosing it down. Collected materials must be disposed of as solid waste. Clean individual stains instead of washing the entire sidewalk if possible. Collect wash water and dispose of into the sanitary sewer or take off site for appropriate disposal if soaps or other cleaners are used. If only water is used, install a catch basin insert or filter cloth in order to collect all solids and debris. Use a minimum amount of sand or deicing salts and sweep up any remaining granules when the snow and ice have melted. Tec21-0R:al haformation Report South ptealto Raaa May 2021 213 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-49 of 75 Record Date:7/9/2021 5:01 PM King County, WA DeouSign Envelope la 77E021 E5-150D-49D8-8A2D-B0996C937CCE A-39: Root Vents and Fugitive E issions This activity applies to processes that vent emissions to the roof and/or the accumulation of pollutants on your roof. Processes of special concern are stone cutting, metal grinding, spray painting, paint stripping, galvanizing and electroplating. Required BMPs Required Routine Maintenance Identify processes that are vented and may contribute pollutants to the roof. Pollutants of concern include and are not limited to: metal dust. grease from food preparation, solvents, hydrocarbon, fines, and stone dust. Install appropriate source control measures such as air pollution control equipment (filters, scrubbers, and other treatment) and/or institute operational or process changes. If proper installation and maintenance of air pollution control equipment does not prevent pollutant fallout on your roof, additional treatment of the roof runoff may be necessary. Install/provide appropriate devices for roof runoff before it is discharged off site. This may include approved water quality treatment BMPs or structural stormwater treatment systems. Maintain air filters and pollution control equipment on a regular basis to ensure they are working properly. (lf you smell odors from outside the building, the pollution control equipment may need maintenance or evaluation.) When cleaning accumulated emissions from roof tops, collect the washwater and loose materials using a sump pump, wet vacuum or similar device. Discharge the collected runoff to the sanitary sewer or have a waste disposal company remove it. Technic Inforrnation IReporl: May 20211 somh !nte,irrf 29 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-50 of 75 Record Date:7/9/2021 5:01 PM King County, WA DomSign Envelope la 778D21E5-150D-4908-8A2D-E30996C937C.C.;E A-40: Street Deteing Operations This activity applies to deicing and anti -icing operations on streets and highways to control ice and snow. Required BMPs Select deicers and anti -icing materials such as sand, calcium chloride, magnesium acetate, potassium acetate, or similar materials that cause less adverse environmental impact than urea, and sodium chloride. Apply only as needed using minimum quantities. Adhere to manufacturers and industry standards of use land application. 11Store de/anti-icing materials (except for sand) in an impervious containment area to keep the material from entering storm or natural drainage systems. Maintain sand piles so that sand cannot wash into the storm drain system. Transfer liquid delanti-icing materials in the containment area or use a drip pan under the hose connection. Sweep/clean up accumulated de/anti-icing materials and grit from roads as soon as possible after the road surface dears. Minimize use in areas where runoff or spray from the roadway immediately enters sensitive areas such as .fish -bearing streams. Supplemental Intensify roadway cleaning in early spring to help remove particulates from road surfaces. BMPs Switch products to one with a lower amount of metals. Ted-wet:al bran-eat:ken Report South eteepre May 202D PO Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-51 of 75 Record Date:7/9/2021 5:01 PM King County, WA DomSign Envelope ID. 778021 E5-150D-4908-8A2D-B0996C937CCE A-41: Wheel Wash and Tire Bath Track Out Controi This activity applies to commercial or industrial operations where materials may be tracked off the property. If a rocked construction -type entrance for unpaved site, or routing sweeping / vacuuming of paved site, does not control rnud and sediment track out; a wheel wash system must be installed. 11 111 11 Required BMPs Install a portable wheel wash system OR Permanent wheel wash system as described in Appendix D, Chapter 0.3.4.3 of the most current edition of the King County Surface Water Design Manual Required Routing 1Change water as necessary. Dispose of wheel wash water to appropriate disposal location. Maintenance Maintain the appropriate level of water per design. Tectonjcal Rdforrnation Report May 20211 111;p1,,r.11 Eteie Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -52 of 75 Record Date:7/9/2021 5:01 PM King County, WA DonnSign Envelope ID. 778021E5-1.50D-49D8-8A2D-B0996C937CCE A-42: Potable Water Line Flushing, Water 'Tank !Maintenance and Hydrant Testi rig Chemicals used in line flushing and tank maintenance are highly toxic to aquatic organisms and can degrade receiving waters/ Required BMPs Discharge water to the sanitary sewer if super chlorination or chemical treatment is used as part of flushing. If sanitary sewer is not available, the water may be infiltrated to the ground as long as it is dechlorinated to a total residual chlorine concentration of 0.1 ppm or less and water quality standards are met, a diffuser is used to prevent erosion, and the water does not cross property lines. Discharging water (chlorinated or dechlorinated) to a stormwater drainage system requires approval from King County Water and Land Resources (WLRD). The water must be dechlorinated to a total residual chlorine concentration of 0.1 ppm or less and pH adjusted if necessary. Water must he volumetrically and velocity controlled to prevent resuspension of sediments in the MS4. Contact WLRD for approval. TecltonInformation Report I 2 tl Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-53 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope IL): .778021E5-150D-49D8-8A2D-B0996C937CCE 45: Maintenance o 11* ublic and Private Utility Corridors and Facilities This covers maintenance activities associated with the transmission and distribution of public and private utilities such as petroleum products, natural gas, water, sewage, and electrical power. This includes the maintenance of underground utility vaults, pump stations, and similar 'facilities Required BMPs Minimize the amount of herbicides and other pesticides used to maintain access roads and facilities. Stabilize access roads or areas of bare ground with gravel, crushed rock, or another method to prevent erosion. Use and manage vegetation to minimize bare groundlsoils that may be susceptible to erosion. Provide stormwater drainage for roads and maintenance areas. Grade roads with a crown or slope to rninimize the potential for erosion from runoff. Provide ditches, swales, and culverts to convey stormwater runoff. Keep ditches and culverts clear to reduce the possibility of the drainage becoming plugged or blocked, causing overflows and erosion. Check utility vaults or other underground structures for oil prior to pumping out any collected water. Contaminated water must he collected for proper disposal. Small amounts of oil may be captured with absorbent material. Never discharge contaminated water; including high or low pH, to storm drainage Ifacilities or surface waters. Check utility vaults or other underground structures for oil prior to pumping out any collected water. Contaminated water must be collected for proper disposal. Small amounts of oil rnay be captured with i absorbent material. Never discharge contaminated water, including high or low pH, to storm drainage facilities or surface waters. When removing water and/or sediment from electrical transformer vaults, determine from records or testing if the transformers contain PCBs. Clean up any debris or spilled material immediately after completing maintenance and repair activities. Technical In:fon:Radon Report Spittle Valve:Aro BaIi:E May 2021 2;3 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -54 of 75 Record Date:7/9/2021 5:01 PM King County, WA DormSign Envelope ID: 778D21E5-151.71)-49D8-8A2D-B0996C937CCE - Vicinity Map - Developed Conditions Threshold Discharge Areas Tecltonic.al Information Report May 202 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -55 of 75 Record Date:7/9/2021 5:01 PM King County, WA DecoSign Envelope ID: 778D21E5-150D-49D8-8A2D-E0996C937CCE K IEWA (] RE DUVALL RED ND TIO AXE LEVU EAU CITY (PRESTON SSAQUAM RENT PROJECT VICINITY o�aye +a�u ELAND AUBURN E1r.AC. JD .,•.,_.1_, TACOMA. h4 + °'s:. "PAC`.VFfC • ERCE Figure G1: Vicinity Map i ecItonjc l itlforr atio11 Report I tll uT�T 1 i .�.- fide 202 tl Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -56 of 75 Record Date:7/9/2021 5:01 PM King County, WA DomSign ET/clopc ID: 778D21E5-150D-49D8AA2D-B0996C937CCE TDA 1 BYPASS 0 FACILITY TDA 2 DISCHARGE LOCATIONS 1l 11' \ TDA 2 SOUTH, WO FACILITY TDA BOUNDARY (TYP) Technical pion Report Figure G2: Developed Site Conditions TDA 1 DISCHARGE LOCATION TDA 11- TARGET SURFACES LAWN - 11,499 SF - 0.28401 AC INCLUDES ALL ONSITE POPSINPGPE NATIVE 1,339 SF 0.0307 AC INCLUDES ALL PCIS ROAU - 294.828 SF - 0,8000 AC INCLUDES ALL 0015 ROOF - 38,668 SF - 0 8418 AC nrus WALK. 9,652 SF 0.2216 AC INCLUDES ALL OTHER 00710 TDA 2 - TARGET SURFACES LAWN 19,510 SF 0.4433 AC INCLUDES ALL ONSITE PGPS7NPi_PS ROAD- 51,789 SF - 115562 AC INCLUDES ALL 5GIS WALK - 1,500 SF - 0.0344 AC INCLUDES ALL UTNER AIPOIS NOM PARKING GARAGE AREA IS NOT A TARGET SURFACE, BUT THE RUNOFF FT GENERATES WILL PASS THROUGH TREATMENT AND DETENTION. THEREFORE, IT IS NCLUSEO IN TWE HYDRO1 DG c M0D6t INPUTS May 2021 ern Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -57 of 75 Record Date:7/9/2021 5:01 PM King County, WA DonnSign Envelope ID: 778D21E5-150D-49D8-8A2D-80995C937CCE dYa - Contech Filterra Owner's Guide - Contech Filterra Maintenance Steps Tecltonic.al tlniormation Report May 202 tl t EISF." :d'7 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -58 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID. 778D21E5-150D-49D8-8A2D-BC996`C937CCE Filterra Owne 's nu C NTECH ENGINEERED SOLUTIONS Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -59 of 75 Record Date:7/9/2021 5:01 PM King County, WA DoonSign Envelope ID. 778D21 E5-156D-49D8-8A2D 9980. 7CCE r Table of Contents Ar , lon r::>, ew.. =111errc Plane Select'iorr Over slew WfWar'nnty Ove e^' Routine 11flointericrwe Gi.didel'i ox Wet nt ranee V12.-511. Pr,c.erdr, A2 p r :11x. 1 —,r., t'ivotio.) Aopenclix 2.. Planting; Fr 1r .;menu For f ilter'r. $r leL ........... _..l'. Enck sed to•c itl Area Filterrc fb,rrt List C`b; -wNTEC ENGNNEERIED SOLUTIONS Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-60 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID: 778D21E5-150D-49D8-8A2D-B0996C937CCE Introduction loon< you for your dyrryhase of the I-niter-aEheret eon on (system. I- Iterro s o Spfrfr (Ay enginderee ere t-eertment system idnoi so-cdidg high peradrmarine Leelihratied diodic kr remove dolleterds frond stonsinoler rudolit. the stdrite ins biota (vegetallod ond resil moorgarbends) ihed Thither hreakdess, and islottoris captured Roblin:ars. All coraponents oHldri itystiorn work logo:tier to provide o sista noble ong-lerm fo- treating too retactier runalf. Tee r5 terv.:3 !vsveir. hos been dalivemed te you with prongs": on n plose to resist nor dttion at construcdon cited sediJoent which Fon cerelantinote the diobIltriation medits add resuIl rrinoticiquidie system 0eTerrionce I hese protection devices toe OF:iv:lee os er best draciiice add canrott hyl en contorninat Ort s tha purcdascr's respansibilay to jsrovide sclegunte meseurait to prevont sonstrucinon ditt chess' Tynistiit troin it:tittering the b Iterrin systom. Includiscl with your pose tActivas on Of °IC, hi loud system by the manufacturer sid '50,5511 rds 0 1 sided- warridrity Sham sielivery of -Hu system /Jo id -year ai 50frifr're molt hedadis ist thou ch replatterenot, debris- red-hdiral, and Arun ryFij of vegeta-IF-AO up to Attics: storing the First year ober oat vahon. Design and installation Eosin project D'csonts scojiiiias tor the use of F Iterb systems. Infon-ricstiod help may be provided be this design thbith ne dosing the pldnd rig process. C0515.505fr H terra 1505X. SIDI); (by -isinitd I 05g on) s essenhdl prey:Fist pollutidris roles tor a given area. Ile engineer 5.55011 S5rfr5Trir Caradari0513 tor opproval ha the local Toisdirtion. The con -ordoi responsiole for rge correct isystallotion ot Ibberio units as itidown in approvittd pions. A ceiniprehens os nsiollation rannuol ati dbent wwoContncHr ES cone Activation Overview Active- on ot lerre system st psi-hoar:bye completad oy the rood dutricsbror placc, the systiare into Acto ado corns hon. This Ilse:skies the following rertlf, ▪ Rf5 510 0:11 55f cu ntoufior ruitoii p rcyedjo'i devices • ing of •the ))ern) ineelisi on Plocerriefq of pterrechtment mulch Foyer usissis inylcd certrintel for f1S55 fer'55.1 SyrSrelf5S Arfil‘rar 01, MJS T- be pc:yid:set inn Ode 5051 rrIffIrfr.re-lo isrisu-e pi odJsr srtrrcoId, lOns are n-iel for ACIr r/Cr1015, propeFotorrof - the hagetabon, and use et pre trier:nitro.1 hlind r ditieci For us:: in biter -n:1 systems, Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-61 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID: 778D21E5-130D49D8 8A2D B0996C937CCE Minimum Requirements The requirements forFiLD Acisisiation ore OS 1.The site londscapteg rest he telly itiPoilized, i.c.ljF landsoopind installed and sense dress cover itist strider and 's required to reduce :secret -eh -ft Codstructipn debdo and materia y thhould removed from s.rndusiding orec, 2.h- n•or is:citing must be •per tipleheri. diisures thht pce n ricIerialsi SV II not elite' iind cordon-in.:re hhe seihteiti qui 1,0 this: poyInD [SSP:Sit-, ld HCI he [dent will ri Sit I unoft 'boss the. drisincide wit plow- oErvivol 3.F Iterre, throcit opedinq should lee oh Icost Yh'i erder he enduro ddequishitis corerelly for ntlesy end glob- s. THROAT OPENING CAST -IN-PLACE GUTTER AND THROAT OPENING (BY CON TRA( FOR PER -----/ LOCAL STANDARDS) THROAT PROTECTION DEVICE DO NOT REMOVE - LEAVE IN PLACE UNTIL SITE 15 STABILIZED AND, FILIERRA IS ACTIVATED .An Actheatied Check .51 i.if included oii piege 12 to eusere proper cooditions ere ireh bor Lent -echo to perform hde Actlyetien sorvicoo. A charge itt;fi $500.30 II hes insist:teed f ch Ardiefthon requested by Cistorbybr whom feilioch dhsterre'ries that the Site iSIOSS not meet the cothellitiens required for Act vutii.thin. 5 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-62 of 75 Record Date:7/9/2021 5:01 PM King County, WA DowSign Envelope ID: 778D21E5-150D--49D8-8A2D-B0996C937CCE Fi[terra Plant Selection Overview A. Plant List has been cmclosed tinith this dooket rnmended plants tot EiRen systems in yogi- •area. Keep in rtt nrd 11 -vs. omits ore 3abiest to iovailchility ciue to 3a:0501 -allay a al remprod pipprniini one fooHe 5i!OL Syr3f....a),.. Haat., laSlallaa the Fdrorso systitin •n Per -domes plants bilas 5 gatonj trons I1L oro siren< rind he intivicdmirt noight omit sprooe ot ,N5tototion. It is the 5r of the or to provide •adoctoitte irrigottittri who-, isocessory the pont of dm NK:TO systern, the 'laid -Mg Per rrnents for hir Petro gysteinst dersiment is inc listed cos on •oppencios and discusses a ()per selecion raid it•ore crf the plonts wfcF1n hilteso systems. Warranty Overview Rete[ to the (Posited-) Esc-tine's:Pod Solytions Stoci x000l Neat -gent System LitAITSED WARRANTY fcc further intitorsci5i5n. The fat ow rig condt- ipcy •VOIC +la ILL:, To systerrnis Aparsoity (Ind weive [trio ornrcrfr:ccf.ro crowded Ad %Visa) crid niensince LtricaltEtr itiod cc:twat:ion or set-taint:oncx of ady of tHx terns I tits:id id "me optimist Oa CA'aaile`a • Arty tortipertnio, intoolttittolistritt rJ.rox.jot5cr Fiiterrn system (-in ncstectios devious:: Rrptiopril of on? tolro systom comccurents Ita lure to prevent cnns-wation related Ampif 11 ono entePrig the silterra system I id lure to prepetly mare cind pipets, (my I -diens, isonsdenesis noluMnit niedin and imdeidirsin sirmei •-dot• miry 're steeped scoarobly 500 the cccx5 Routine Maintenance Guidelines Vit srocer raaarla micintertonce, the biro:SIN/mon media within the is terra system shituld loot sot oiirti as inoiditmsol b °retention nsedin. Rop- ne issiailitinanoe 0 mcl.pied oy Ocxmontitcyruror oll 11-ersit „id/steins for Me r rs yen r atter 0.Cfriailari. Thi.x 1,(1.K.Kla Ireal'aJM cO 2 ysthi aa remove (Jobs°, replace pretreatment 11.1 car, and 50000 the yeDettation. More in:Formation 10 oroy nod in the iOcerolicitict and Matrilenacise aionie [Ee's° snisteins also contain creirecircent outlet'boys. Dededd ste pot Mort Istommil, these lenyis roey pm .1 IC, aanad C remescl of Sorbon,. homily:sr s not aCI.KAGG 111 ttcoftrnt !,,Caa and would hkely not be required within this first year oi oettrotims. -these Saa.a0a;;, 00 nyet OS n"wire racintionicince °I:inside et he included -Mgt year, can ore preiiielttici Fry iissit tied roointertansie providers toren Oa He C. unledri website. insining :tic° also be piovided -o fb hdritiPiCier aaarVellance lantisecee 50111ldal Instrument Numbcr: 20210709002625 Documcnt:COV Ree: $177.50 Pagc-63 of 75 Record Date:7/9/2021 5:01 PM King County, WA DowSign Envelope, ID: '778D21E5-150D-49DE1-82D-BC996C937CCE Why Mcdntain? All spontrwater Ireoltytent syste-sa- require monde itottect for eltective cperotion. Thid necessity is often ineornoitoteti yotp nropertynt perriniti riq process as legs, ly b Hips) FIIMP nnfitnettenott ntdreenterd. Other reostony to triaintain ore, livtnncliind, le[ cholltsoges {torn yout 'jurisdiction's npirtistunryde enforcement progront nr phoning the expected life:soon of your hillerrn ntedia. Avoyttxpti roore cosily rinttylfri prance neat Hing oddcd polltrnrdi loocts letnt&G your pronertft. 'dimple maintenance of the, Pilletro 's required to continue effective uo:Intrxrtt rentnvol from SsosInt,:ttEtr runoff before dIschergei into ownorite VI venters. This procculttiss wi.I olso extend thelorpigoyity tiefr biofiltot systmn. The onit will recycle :find occomoloto pol ittenis wisfrn th. Imonsist3s, opt silso sot:veiled to, °the,' frictional.; entenng the inlet. Ttit s m.ay Include ttpdth, tn enoes AhicssstJbe canto ned above the mulch !asp," Too tin )Ch SI t may inhilni the fhtleoro's &AN rote, vflotthit Isthe teasctin for site sip sifiziotion befom selivation. Repolorteoloceigiertt of the mulch stops occurritfloPon oit sued seeiment. When to Makitain? Contc:-.H -.15:`,.tnics 0 1 tivodt 551 55055055 p•on nvittt ecich sysTift purchase. Annecy includoel smoinitenonen cons sts af cti romermim I2 schoglyiedvfr55s ..Aiiieitiasis reelniemodep may be,rfecotss,tory itlederedirig on sediment end •Ia3:31 (..Inginier or nt addifonel cosh, line start of toe rocintoponco pfriripoupos wipe it the system iist tvtaintenonce COO scheduled oda:fie-2)11y; the siring visit e net to 555,5 up ISfter wynter leads pncludinq solfs and f:30116:1 Wilde the fall visit helps •the system by rertfoit riq 0,S,SeSSIISO lent liner. I- nos aeon found thct irs reTtions teceiye oetwoop 30-O0 inches of annual 121 two ts hoof cienetal•is, require& regions with less toiMio I often only requi to (II ono visit pot cerium, VISSyin; lend usos con isiftset mailitenonec tiroiduenotp mg. soresr foist food riestouronts require mono frequent 55(151 so -novo Contributing cl (silage SI'SSCIS wilco ore subject to navy development vvInere n the recorarnended erosion end sty:fit-lent cootrol in&tsorpfs Incve not been itnn (311151555S/ SISSIS tea x re of.ktifonol ritnintenc nce visits. SSI:15, sTbieuted to extreme insid ut Posh oucts, teflitirine :nate fretless& rhointedance xisits h...is the intrison for detailed notet; of raptintenance &Pions per unit, holding the S.inplier rang °tax& predict rotors motntenonce geq.poncies, refloping jrrdsutursbSls0 ':.dif,rrs. OWSICII'S MUSS promptly notify itlitit.s Itort ntensineet 5..tpo es of arty dnrnaft,pd to the plorit(s), welch consttele(sI on integrol port of tho bio ion:miff:se tochnoloo,y. Cfsignifigis should also ofivise other inrrl.scei S12 or mointemitneo 55015055 .'ars to Ineve 011 -no isledencto 0tho SuoelIor e no pioning 0- fora oip91 during the Hs- yeur 7 Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-64 of 75 Record Date:7/9/2021 5:01 PM King County, WA Doe,Sign Envelope ID: •778D21E5-150D-49D8-8A2D-B0996C937CCE Exclusion of Services Clear, Jo due ita major cep -air netbn such os C5,ceem kepis, toxic spilis, etc. iF result in odd timad cots ond ore itot covered kahtler bite Supplier mertienence caul:foci.. Shedd m1 contchnimbion event occur the Owner firmikt bloc< ort the outlet dipe the Fikerro (where the cieened runoff- drain; to, such us drop ittleilit end block ad the ihmoot of the Filtirrvie. The, Supplier shortie.] be ititionined immediately. Maintenance •V4 isit Summary Each mointenonce visit coesists of the ircillowinD simpic tasks (elk -toiled instructions below). 1. I nspectiprit of Fikerro and S inemncling Ci 1'0'0 2.. ken-it:2,3d ot tree grale omit LD (i conte stones 3 Removal of debris, ratan and my co itArich replacernitint 5. Plant litenth e oluarlon orid prithikiitg rerkincement es neitiesiyary Ph. aeon onto around fallout° 7. Ccimplete paperwork Mainte, ilium Tools, Safety Equipment and Supplies Ideal tools n do: chit ineritt, bucket hackie:, diciont, [rut -tern, hoe/hake, and rade meoSUre...Approdriate "e'er:fend Protective Equipment (PPE) should be used in accordance with FQCC eropeny p.oroecln res. 7.[IiS .1"1.39 gloves where tile •type or trash inknown, high miab ley clothing (rid uorriciados whorl working n,ncn proxim ty Pc trorrIc Ord CISO SCIL:,ty :clod sooer;. A TrE1cr cit croxrbor stattuid be used for moving tile tree grates (hp to I/O :bs eie.j. Most Visits red,fire terror trash rernewhil and n iuli mplaceiment of Leith+, See below tor incikol number cq budji-jed rou ch trier is required in pack rrierlia bey sitter Mulch seete, be c double shredded, eardwood moriety. Some visits may require additictio Fiiterra engineered soi medic. °kickable from the Supplier. tt kx :err tifinv hem I aka Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -65 of 75 Record Datc:7/9/2021 5:01 PM King County, WA DourSir '1 Envelope ID. 778D2I E5-15OD-49Ds3-& 2D-B6996C937CCE Maintenance Visit Procedure Keep suff _ err eui :ntn ion se- rnCli tenonse a.t ons to precks- serple C c Hi nr°rnc.e Report is ndLICred Ln Ih ,'nonoral etrn�_'te.r cmc teno' e ereuerreles Ennui rerros., inspectlon of Filterrca grand.surround'ing area • Rleo r f urdFeidr.nl a it Lexie rot -El Torrence wrth ph Ir elph (nureberool. Foc>r1 on lVcsirt,. nencc Floport rt 'see c<or pla in Hrs docJrnentltho fel av 2. Removal of tree arcate and erosion control stones Remove COi 'iron trete:; fora ess irrrr rl ei bor: ^^ LYE' rthrIt "i orr tEl nnt3 mr.,lclr t rM rer, ,vu, rro;r.,ls: .> . Removal of de9+rws, trash and mulch red opor-"'re Filer, ar ,neer ri nre Ic sc l t,. thse ror Inp slob. Ire th�H m(O r s....asta a a tc th^ d sfur _,r shown on the i c t:cl C ontrect Drrowint;s for the t stern, x ilturr r(not t p : 6I or other) to bring t rthreElio up cs nee f d to EfiEton : indicated on d`aw,r r;s- Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-66 of 75 Record Datc:7/9/2021 5:01 PM King County, WA DoeuSign Envelope ID: 778D21E5-150D-49D8-8A2D-E30996C937CCE 4. Mulch replacement Add diixiiblesyeddd rr.c venly the entire Linn .C) defffil) •dif 3''. 0 PA/IC[1 Sp3cifir .)n3 for 11,101Y1Cilf)11 :7:11 CC.C.:0011,3 So1,11;CS • CO'rC,C."7 rniimsrfoning ends on corriol nionfis Hlicrra allow tor enhDfIoshunq slo, (1 iiveent I nein), grCO-eS COI r3c[1,/ JS iapprop rite 1,1 -Eng or moving ligio13, tclinng care not to du difIcipif the plant. . Plant health evaluation and pruning or replacement . Clean area around Fliterra ▪ Cflecn cren nrni nand rinmove n11 fer,Kif, •tO Of: ri7SpOS(:6 Ot opp-opi nfifly 7. Cornplete paperwork • Deli Pilo.hto,ove Report and phcitirdpflif appropria7e locuriod (normal y. added') dui-in:4 F1101r-Ce1,011C0 cord -foci period). • Sonde Ififii)dicilor6 may equirid subm"ssicY) of maidiencnce repots occordnnife win, idarovuls. It Is the respodsibIlity ine Onvner to Copy itH lOCC). )ofions. Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-67 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID: 778D21E5P150D-49D8-8A2D-B0996C937CCE encance Checklist Mulch Cover Me loll Cover Efsesseses suflirrout or ss oecie elle- on n el should be fvse 01,,truct cns clbwing fross Jiff vestei nto -Hem, :oh end Ike. te :f. [-reds eirejrfe "ones, fru ill ce eflfor debris for. cruel,: tion 07CI. rn ,Irstior os mules :sever 'Pune/ wet., roules offsel 'Pe -ding ' f sould ind co iv, , lour:1,9 dee feresoveltel flefolol fl n .sefesses ns sod 1ent Hee !./ ere) -leoff91/ 'see: .re.flets,sn se- spill of P,170 C,111 01, S211/1511 Ch 7,0 2] '0 Of" P 01,fr, 0,111,; S0't 2Pc..01'1K,J p[Z:nf selection Plants fHJ se see Ohy end e'f or lu poor concle on Posf infsssetlen. Veneichs, to pcst lres ule nts Seclisnonts tosh should :se -emceed.. Fresh cold dee Vs sIffesd 055 5' :•oel seeelf "-fees vlfes1 level_ Ensure b nut:e;,et mulch is nos used. Plere ices1-1 Heels s efuld be up:viol:lief,: e Vevolefer set e sue:jos end Ivo -felon of ElHe)11, Crocks ofeies es:, 1/2 Sself Stuvetuo hos Vsible or. ovicience of« 1 20 rtlicles Sfruct,re ecks. ervering des strucure ileougs fee c Fliterra inspection & Mofintenance Lag Filterra System Size/Model: Location: fUessrurnervfl sunfree:Jure- esld mcm uluf-es reules o 50.n.11,501 Iff,u,Iece nucinuesetures for ecIfeee !CIRVID -une plen-ls eccemeluvf.e lervlsoeising.,, 2fel slesfy, seeds sfloult should Ole resoireol. Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -68 of 75 Record Date:7/9/2021 5:01 PM King County, WA DowSign Envelope ID, 7781321E5-150D-49D8-8,12D-B0996C937CCE Appendix 1 - Filterra' Activation C Prejec• Norse:. Site h. oetaief Sdrid Owrier/Efriyil fhtiiiiiE Nome: Preferred Am lise DEE: ecklist CqNTECH ENGNEERED SOLUTiONS Ceryirionyii Site Coeiliscif Phoire/EryiEfli Site °weer/End Jeer PhosicelErinif ,r,RYID`iide 2 iweeks miErieum frioriii dote t submihted) ... ilt,l' ' igrwrion SV.,jegyp Si LC .- ' . ... En1. PrivnniEnt l - ' r, Too C , 1 ' . '' Complele Landscoping ' C 0 , ^001f) eiL / Caross EnlePging Constructon ' - — • • mulerlal, / P',Ilas / Debris 11Zorra0ved Thrnat - ' OPPIlIng me,,,,,-,„.,,,,, 41' Min. Ht."43.51 Pllord h.P.e..J,n Requastod D No 0 0 YE.; hfio ID El Yes Na D Ell Yehi Nei D D l(sys Niiie D Y.:,-3 0 0 seC S Nlie El D Yies No 0 D Yes the D FA 1`(a3 hici El Cl Ycs Na [3 ID 1,In D El K.:3 NO D El 11 11.7] NI '3 Ili 33 No [3 '5-, ID El Ye,". No D D Yes IsIss 0 O illey hisle 0 Y.-..,3 El 131 Ye`, Ns 0 El Yk-'=`, 51 sy El Isle 0 Ell Yieii,. \le 0 111 Yys fsley 0 Ns 0 ET Yey Nile 0 Ell iiYe., No 0 1E1 FA El.] Yt:, Nils 0 El Yu'i Idlie hill 1 Yes No El 0 Ye ‘,,c, hirifyis ',0 5 1,1, NOTE.A c'3-ifje of 5500.03 -/ocndfo eiffieh recti t reouefed Syheisferne- whese cietermises thet the see eiffes hot meet dye ons rifeeryielliff Er ArElies or, ONLY Lorded:ha outhrieriiecl reieresEsitothes eon pertywhe Acifewid or) olf- Ificeiro iihysiiissre5f nriorytieoszfixf Actymiiiiides wiSpo d the sysicer wciereiely aryl SUpplICCi Act v cJi o on3 Year fYliEriferreniste. 3rg lecture Dote Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-69 of 75 Record Datc:7/9/2021 5:01 PM King County, WA Doc, Sign Envelope ID: •778D21E5-150D-49D8-8A2D-BC996C937CCE Appendix 2 - Pkinti g Requirements for Fiiterre Systems Pkant Material Selection - loot 1Cnt1n 0n spool:loci n fH. ong ncorrig o on., oda :To:tit:root ono Soled plc:0)st with '1,11 cucu developritont Hut lent lent 111a ac. (rhea. root hound lase lorrulncnnre' col ,tintant nts Dal (red air lapped pleats eta no perrnaiort Ho- precast chorea systems iniite 0 tree grate, plant)nt mint no have scaffold I rbbs et least 14 it t•ithes Hem t13,3 crown due. to spezing bah -weer, the roe •ef the in. en cold tile irOC: grate, tower keen:tic ) can Ho ter unea away provided Here cnn ,:yd scot -told ocas Mena systerv,s will trete grate, hi- the: Pete of nstalletion, 11 is required -----1301P:UniRFACE branchen for tree ot shreib denntoprpent. CROWN rt. ilnat pleet(s1 'east be at Iciest 6" (thew() the tree gr,rthe openieg ;31 installtet1on to- ell HFt.nnttt A centigiratirees. 11-111s DOES NOb Eel ()),,31,), orrat design, PleePs1 shall net 114.1VE: (.9m ct,,ne knight groatta -bon 25 fore, For standar() 21 (neat() delete, 11 5 gallon colic:nor size shall be used. Medic, ess then 21" )11; Iterra boxes only) wi reeuian smal er centai ter aluele • preens- '•threw) systems, planiet) sheutd 110,0) a svte e trent) al lesen110111. and praning may Her necessary ail acrAration and maintenance fax 5;)17e :5 tlin 1(nster ;growing seecies, or 59n In: frboten to produce bonaripro.fts Plant installation During traespon protect the plant leaves from wiry end excessive 11rest03 Prior to removing the plantrs) from the no'Ialif,er, ensure the soh moisterie is sufficient to ro(Ontain the integrity ot fog toot boll. If needed, pretwert tee contornor ptent. Cut event, any eots which are growing ou: of the container drain [vales. Pants with E,C(1,SSiVe root growth fox, tine (1,3(Xn holes should be rejecter] Plattbst should be ,narefilly removed 'from the pot by gently podecting on the sides oti tee contaieer with the fist to loirrren root Hell. Then ericerti ly slide ;net. TT() not ift alaritis) :ay trtepth as this pen hero:, roots and zoese sei nofol off. Extrinci the root ball en a honzontal pose ,ar, and nnp cotitto prevent I, ',Ort, blnder-ire artart 51tertriative v the poi CC LI LO wit away tO inireareze root bat disturbance. Retrarben any ...T ....Y3 fr011) "00i- •H 11'3 after rennovirig plent)s) hewn pont airier. 5,7.,(P.T1t0 n halo wee (7, etitenoter 4" greeter- I -hien the -toot bre I, geritts, reace ono reantpi). • If plaids) :lave any cireing rocnts front being pet Sound, gerttly tease there loose without breaking theta. If root as has ncnot not on the bottom, it should be slaved off with in sni1e) rust above the mat line. ▪ Plaint the treerfthiabAgress wire one top of 'line root Hell 1' 0 ea. 0 S.)1,0 ind:n'j media to 01,0'0 for setsing. All plants shot., 5 'ICIVe the m cn, stern cartiered in the tree grate (..ole applicable) upon col -1)0000n or instarlafien. 10';'ith all treas./sr, `0110VC, dnod, ....,nnnnc CrOSSed bk7jrlai, sharply crotchet() brOlCileS 0" branches gnawing excessively long or in wrong chreofien compaand to rznettorty of breaches. To prevent transplant snook (especially 11 planting takes place 03 the not season), it rricy be necessary ten (Pune sore tO COLY11C,1SniC, rOdL1C0d FOC,1 uptako oarneetty. "hi s is oceortephrincre ov pruning away 5C,YIK, of thC, sroollo. secondary Otortches 0l0 main scaffold branch if there ore too rsony Too mcch foliage -erahve to tbe root lartIll inctr) denvd-ore rend domoge the plot et. Plait stakIng rear/ 00 reviroa. Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Pagc-70 of 75 Record Datc:7/9/2021 5:01 PM King County, WA Doe,Sign Envelope ID: T7802105 -155D -4908-802D--1309960837000 Mulch Installation • OHv mulch that hos bona .neolHq Conteh broil-teensy:I fusfiVrOW n ) sueiat codons non be ..6E1171 11 the = Ifindu statern. ft Mulch muss he smoked slept of 3' evenly ovCr 11,111 SW' f teht net(11(1 Irrigation Requirements EaCIF systom must infccivo cseogliam 1-riff:if:non to onsuris SUIiVC.1 01.1 tie living systent, durIng periods of drifts weattfins Irrigutif)l) sources instude roirtfull runoff from :floonspoffis andfor stutter flD`,./, applIed vdaew Ihreadh the trete gate or in some (111113eS hots .1111 Itetgarlol system with erfaifters Hstallest (12ring constnactIon. At Activshom Apply about one (cool dirnates) to two (Amon climates) gallons alt wafer per inch of trim( clionnater ovet the foot bok. During Establishim,erus H common wails 01, o ,onfs, ectua =Herm plow OHsetoff na intone frequent yodering Mng He establashrfient period. One inch of applied yvoter per week for the first three mantas is recommended for coo er (1111-11511teS (2 to 3 inches i -or wormer climuies). I•f •He system is teceivirsq ram runoff Mum the dminaaffs osea, theft lagoticH may nal be noesiock. Frrspcchos of the soil snaisture content cad of) Cr/et•lt1111d by gcntly arushing offing th;.r akt ch toyer and 1k:fit:lin the soil) Efis su'e to reploce the mrAcbWhen the ossescment is complete. Irrigate OS needed—. Edon( shed Korth)) Established [dents hove fitly deseloped root systetns oust tss li ittetteSS tle errlisrr 1,e(11-55 column in toe nve0io. herefo irrigcnnoo i.svess :frequ4s4 but requIre5 1"TY..,3 0[00 IC6soctorWhal perforrned, F-44 Ct Matti r.,7, system ossime filches of ovoIlou C2, water wilfir, the ntedia Hatrix. FtrIgotion denkund son be es(1nmted os of aright -an demand pet wessk. Thetrefoto 2dat penods exceed 3 weeks, irrigator) moy be require) t 5250 .H11,:),:)11C rif 70 recognido Hot plants yofich ore ficsased to windy kfistas and refracted 'lent Ecco paved sky-ft:toes may need snore frequea imigation. Long terns sate should ,ftwelou ohisto whiCh is "(10 'e 7ry speOkits. ['lye gallons per squore rod opproxicastes inco 55 skater Therefore los o 6' by fa rf Hart •naproxinsaidy 20-60 gol oas of water is needed, ensme even dtstribution of waist it needs to be evenly satiated over the 11.11.11,11 surface of the iitto bed, dfitn soecso onention rytakte shim the root ooll contnlealy stfefiect. \spilt f needed, roteCYSUle He time It takes to •f t's five at:tilos, bucket to astindsto applicd wafer •flow roe thr.11 1:1:11flet! ....to thio -info nonded to utigan) the F Ito'ro loar ofiamp fs, if thc f man of the saidyles is ft gollonsAninste Hen 3 would take 2. naiades to irriquie o ',SI by 22 filtex 20 50 ysrss '4',,fifIr Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -71 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID. 778D21 E5-150D-19D8-8A2D-B0996C937CCE Notes Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -72 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID. 778D21 E5-15OD-49D8-8,42D-B0996C937CCE C�a TECH ENGNEERED SOLUTIONS 9025 Cents; Pointe Dive Suite 400 4^.;,:est Chester, 0-1.45069 nonterelnesreorn 800-338-1122 wiww.C:orrecheStere n IAii iJIKI'EI -D.� His el 11 9 L 'IJh EI. 411-1 r !�. Nrir Il,r Is res /A....,. .PF'll. .IJ X61, Ir. III I;:IlVAl l`r .'IJLL Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -73 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID. 775D21E5-l50D-49D8-8.42D-LO99kiO9-7CCE NTECH ENGIINEEREO SOLUTIONS Filterra® Maintenance Steps 1. Inspect on of Filterra and surrounding area 3 Removal of debn.s, trash and mulch 5. Clean area around RFlerra 2. Romoval of frac:, erosion control star and 4. Mulch replacement 6. Complete paperwork and ren height and width plant Contech has created a network of Certified Wicintenance Providers (CCMP's) to provide maintenance on Filterra systems. 1g find a CCMP in your area please vise www.conteches.com/maintenance Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -74 of 75 Record Date:7/9/2021 5:01 PM King County, WA DocuSign Envelope ID: 778D21E5-150D-49D8-8A2D-B0996C937 Technical loftioirmatiorl Report So[cra'ocerlrn Base: May 202V Instrument Numbcr: 20210709002625 Documcnt:COV Rcc: $177.50 Page -75 of 75 Record Date:7/9/2021 5:01 PM King County, WA DorouSign Envelope ID: 778D21E5-150D-49D8-8A2D-B0996C937CCE South Interim Base - 12400 East Marginal Way S Stormwater Drainage Inspection Surveys & Maintenance Log Structure Tot Depth Capacity Transf,rrner Pad ...56... NIA Garage UD - N/A qP�umped s 4r ; 94 N'A NE Filters - Outlet 70 25 °' Detention Vault - South 63 18 65 18 CB -1 i Type 2 112 26 CB -2 / Type 2 92 27 CB3/Type l 71 18 C13-4 ',Type 2 94 28 CB 5 i T pe 2 87 22 CB -6I Ty 2 98 36 CB27 / Type 1 57 18 CB -8 / Type 1 50 18 CB -9j Type 1 64 24 CB 10 / stype 2 116 36 CB1l/Type 2 118 73 CB 12 / Type 1 68 18 0013 / Type 1 45 18 CB -14 / Type 1 53 18 CB -15 / Type 1 49 18 CB -16 / Type 1 58 18 CB 17 .' Type 1 44 18 CB18/ Type 1 50 18 CB«19/Type 1 55 18 CB 20 t Type 1 46 18 CB -21 / Type,1 94 18 CB -2'2 1 Type 2 86 36 00-23 / Type 1 58 18 CB -24 / Type t 50 18 CB 25 / Type 1 45 18 CB 261 Type 1 44 18 CB -271 Type 1 CB -28 / Type 2 62 58 17 36 CB -29 lType CB -30 / Type 1 31 18 1 25 18 CB 31 / 'Type 2 58 36 CB 32/Type 1 45 18 CB 33 / Type 1 43 18 C1d«34 / Type 1 56 19 CB -35 / Type 1 53 18 Work Orde :==» Transit Responsible CBs 35 Transit SW Facilities 5/12/2021 Excellent Excellent Excellent Excellent Excellent Excellent Excellent Empty Empty 112 92 71 94 87 98 57 50 64 116 118 68 45 53 49 58 44 50 55 46 94 86 58 50 45 44 62 58 31 25 58 45 43 56 53