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Home My WebLink AboutRC 20171020000833 r � Return Address: City Clerk's Office City of Renton ---__ __------ : _ _ __ ____ __ 105 5 S Grady W ay �1��I��f�� Renton,WA 98057 �� V� ( � �L��7� COV�NANT R�a:�1�b.Qt� 101201241712:U2 PM KING C+�UMTY,WA f �, �: DECLARATION OF COVENANT �`uK tN,Y�:CTION AND � MAINTENANCE OF STORMWATER FACILITIES AND BMPS Grantor: 1Neston Hei�hts LLC Grantee: City of Renton Legal Description: S�e Exhsbit'G' Assessor's Tax Parcel ID#: 1�23059052, �12;059010 f= IN CONSIDERATION of the approved City of Renton Canstructic�n permit for application file No.LUA/SWP 1715-OtJ6162 relating to the real property("Property") described above,the Grantor(s),the owner(s)in fee of that Property,hereby covenants(covenant)with the City of Renton, a political subdivision of the state of Washington,that he/she(they)will observe, consent to, and abide by the conditions and obligations set forth and described in Paragraphs 1 through 10 below with regard to the Property, and hereby grants(grant) an easement as described in Paragraphs 2 and 3. Grantor(s)hereby grants(grant), covenants(covenant),and agrees(agree)as follows: 1. The Grantor(s)or his/her(their)successors in interest and assigns("Owners of the described property")shall at their own cost, operate,maintain,and keep in good repair,the Property's stormwater facilities and/or best management practices("BMPs") constructed as required in the approved construction plans and specifications R-3895 on file with the City of Renton and submitted to the City of Renton for the review and approval of permit(s) LJ�5-0�7616� . The property's stormwater facilities and/or best management practices("BMPs")are shown and/or listed on Exhibit A. The property's stormwater facilities and/or BMPs shall be maintained in compliance with the '° operation and maintenance schedule included and attached herein as Eachibit B. Stormwater facilities � include pipes, swales,tanks,vaults,ponds,and other engineered structures designed to manage and/or k;; treat stormwater on the Property. Stormwater BMPs include dispersion and infiltration devices,native vegetated areas,permeable pavements,vegetated roofs,rainwater harvesting systems,reduced impervious surface coverage,and other measures designed to reduce the amount of stormwater runoff on the Property. _ 2. City of Renton shall have the right to ingress and egress over those portions of the Property necessary to perform inspections of the stormwater facilities and BMPs and conduct maintenance activities specified in this Declaration of Covenant and in accordance with RMC 4-6-030. � 3. If City of Renton deternunes that maintenance or repair work is required to be done to any of the stormwater facilities or BMPs, City of Renton shall give notice of the specific maintenance and/or repair work required pursuant to RMC 4-6-030. The City shall also set a reasonable time in which such Page 1 of 3 Form Approved by City Attorney 10/2013 '` � . , � work is to be completed by the Owners. If the above required maintenance or repair is not completed within the time set by the City,the City may perform the required maintenance or repair,and hereby is given access to the Property,subject to the exclusion in Paragraph 2 above, for such purposes. Written notice will be sent to the Owners stating the City's intention to perform such work. This work will not commence until at least seven(7)days after such notice is mailed. If,within the sole discretion of the City,there exists an imminent or present danger,the seven(7) day notice period will be waived and maintenance and/or repair work will begin immediately. 4. If at any time the City of Renton reasonably determines that a stormwater facility or BMP on the Property creates any of the hazardous conditions listed in RMC 4-4-060 G or relevant municipal successor's codes as applicable and herein incorporated by reference,the City may take measures specified therein. 5. The Owners shall assume all responsibility for the cost of any maintenance or repair wark completed by the City as described in Paragraph 3 or any measures taken by the City to address hazardous conditions 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. If legal action ensues,the prevailing party is entitled to recover reasonable litigation costs and attorney's fees. 6. The Owners are hereby required to obtain written approval from City of Renton prior to filling,piping,cutting,or removing vegetation(except in routine landscape maintenance)in open vegetated stormwater facilities(such as swales,channels,ditches,ponds,etc.), or performing any alterations or modifications to the stormwater facilities and BMPs referenced in this Declaration of Covenant. 7. Any notice or consent required to be given or otherwise provided for by the provisions of this Agreement shall be effective upon personal delivery,or three(3)days after mailing by Certified Mail, return receipt requested. 8. With regard to the matters addressed herein,this agreement constitutes the entire agreement between the parties,and supersedes all prior discussions,negotiations, and all agreements whatsoever whether oral or written. 9. This Declaration of Covenant is intended to protect the value and desirability of the real property described above,and shall inure to the benefit of all the citizens of the City of Renton and its successors and assigns. This Declaration of Covenant shall run with the land and be binding upon Grantor(s),and Grantor's(s')successors in interest,and assigns. 10. This Declaration of Covenant may be terminated by execution of a written agreement by the Owners and the City that is recarded by King County in its real property records. IN WITNESS WHEREOF,this Declaration c�f Covenant for the Inspection and Maint ance of Stormwater Facilities and BMPs is executed this /D day of -�' , 2 ------_ R,owner f the Property cl ey �. �f��i, c� GRANTOR,owner of the Property Page 2 of 3 Form Approved by City Attorney 10/2013 ; , STATE OF WASHINGTON ) COLINTY OF KING )ss. On this day personally appeared before me: TI i' ,to me known to be the individual(s)described in and who execute e within and foregoing instrument and acknowledged that they signed the same as their free and voluntary act and deed, for the uses and purposes therein stated. Given under my hand and official seal this �� day of � ,20�2. � a. �s a•v✓ Notary Public printed na • State of Washington Nota Public in and for the State of Washin ton TANYA M BUSHAW �' g � My Appointment Expires Aug 16,2019 residing at ��i W� My appointment expires �/��/9 Page 3 of 3 Form Approved by City Attorney 10/2013 . . I ---�x,__�_____�_^ � _ ----- -,.�..,_. � � - .'. _ � , '-�--�-.-:IV E-�TtI;P-�--:� . -___.,-.--�-�' f00'•': •.. y�'': � ,. . . . - - - • ' f�• : • ' � . �;=.�"--�-��:.�-_- • '.ti '�56�06•:��:��:�•':o.� ` .• - - - ::9S�'•"� ._.• '�.�- ----��.._::,�, �.o.••. �•57+D0. ;•�-�:�,; -._` -�. ` ~�' ' : •:';``'�--W � i—�t -- .r�:.�,� ,` � 1 `� �� . - _ .._��;: \ �� _..-a-- � �. � _� ~ � �•� � � � �'--� ISTA 30+31.75 � I � (8.32 R'� I I � i CB #14 sra �� ( I I f�-se-�r} rl � o � � - ___ - � ( � R N ( �,I I J I M) � � I O � N I I � � I � �_� \ ----__ - _� ( � � �� _ ��~ � / �I � �� (i � SEE NOTE 3 II / � 10 / I� ' STA 32+42.�6 (V STR PAD ( � � (8.25 RT) j \ \EL 526.5 � � I) � � STA�13�r,-�,-�P \ � � � �� --_" I MATCHLINE SEE PAGE NO.18 WESTON HEIGHTS 1"'40' EXHIBIT A S`e'e PRIVATE STORMWATER 1A OF 3 FACILITIES MAP page Na. MATCHLINE SEE PAGE NO. 1A ` ", N \� 69-.7 DF I �a, CB �12 l STA / � ---__ ` 1�' DI � f$'Sg--F`F'r \ '`�� S=0;539� II � , STA 33+11.79 � �, } 1� �/ \ � ; (8.33 RT) � I STR'�D `�. � EL 5�6.0 II� � � / � e 3 RIP—RAP � OUTLET �2 I 4.6 PAD � — OUTLET N 182628.97 #2 E 1317199.60 � I IE=518.54 II , 12" DI 78.3 LF 12 . — S=1.33� S� P� ,,% / � � �PERK FILTER EL 525.50� —J�� J 'gq #13 4.6 � \ I � <<� � � STA 33+90.27 (8.50 RT) � �� + � INLET �2 � �S N 182564.80 1� \ M �� — E 1317244.07 � \(——— �, , IE=518.48 I I� � , �-� 12" SD � � �� ———— � � '� z so - � � s=oaox PRIVATE� \� ' STA 34+71.�s 1 , , i � j STORMWATER � �e�#,� I _ TRACT 'C' � STA 3�+�-7-96 � � —— `'" '— _ I I ��_� ` � �� \ i2" so � , � � �_ � x .3 LF 12 SD Ss0.737_ � �12" SD � _i — — '1.49. LLS��„2 ` — — STA 34+99.12 D SP RSION � (5�17 �, TRENCH � (AS—BUIL'� / — CB #10A SEE COR CB �9 SEE DRAINAG TRACT STA��w STD PLAN STA 34+94.56 C DETAIL SHEEf C4.3 • 224.00 (153.89 RT) � SHEET C4.4 — � WESTON HEIGHTS t"=40' EXHIBIT A S`°�° PRIVATE STORMWATER 1g OF 3 FACILITIES MAP page No. : . EXHIBIT A(CONT) MANHOLE FRAME ANU LOCKI\G COVER LID ELEV. 524.33 .�.._—.-'�/��\%T�/�\/�\/\\��\ .'• 5 %\\/\\�f�\�\\/\\, �\/�\/�\/�\/�\/��/� `� p �/�//�//�/��/, \i\\��//� �� -:. . - �� /\/�/\/��\//\//\ . *�. :- �: �; . ,�\\�>� �\,��\ TOP OF RISER ELEV. §�:96522.06 : z 'd• 1.50" NOTCH - - � _._.._ Q. , � ELEV= §?,-�9 521.75 8° MIN. SHEAR GATE W �•a� • CONTROL ROD FOR EL[i0W RESTRICTOR ELEV. �952t.14 : CLEANOUT/ DRAIN (BEND R G b . = 5 8 t� • ROD AS REQ. FOR ELI30W RESTRICTOR ELEV. � �-- VERIICAL ALIGNMEM ORIFICE DIA. = t—f 4' 520.63 . W/COVER) _� 1?." INLEf (N'N) 12" DUTLET ('N) ELEV. 518.50 o ELEV. 518.50 �— 12" CMP RISER STAND?IPE � o N �"' PRINARY ORIFlCE ELEV. §�fi�.s8 516.51 � z RESTRICTOR PLATE VJITH ROUND, 3 � CA7CH BASlN STEP CLEAN 7 8" DIA., SHARP EDGED • (SEE DETAIL) ORIFICE SHOP—DRILLED IN 12 GA. N ° PLATE, Y�ELDED TO RISER •o :r!, , ;�', �' a• rvore REFER TO SHEET C4.4 FOR CONTROL STRUCTURE DEfAILS, PER COR S7D PLN 237.00. � CB#10 - CONTROL STRUCTURE – TYPE 2-64'CATCH BA81N SGALE:1"�2' EXHIBIT A (CONT) 7.50' [90.00'�] 6.58' [79.00"] 24.00"X24.00" TRAFFIC RATED GRATED INLEf. INLET, �16.00" OPENING FOR -- -- 3X Perk FilterT"' 4.08' �12.00" DIP, IE: 521.75'. o ,�o � `� 18.00" CARTRIDGES. [49.00"] � - � � I U o 91 I � A ""�„'. � - � o �� , , ' A 5.00' � �� [60.00' � _�__ 1 � = VENTED HOOD � � . - '�� . � SK-0871• , � , siz=a�� ' 0 �� ----------- � INLET/BYPASS ASSEMBLY SK-0574. 1� " , _" OUTLET, �d18.00 OPENING FOR I `� �12.00" HDPE, IE: 519.43'. TOP SLAB NOT SHOWN FOR CLARITY. ACCESS COVER AND GRATE � INLET SHOWN IN PHANTOM. 15' ---30.00" TOP VIEW OF PERK FILTER VAULT — 4' X 6.5' , 18" CARTRIAGES, 3 EACH PAGE 1 OF 3 EXHIBIT A (CONT) �24.00" TRAFFIC RATED GRATED INLET. 036.�D" BOITED & GASKEfED ACCESS COVER. FIELD POURED CONCRETE COLLAR REQUIRED, � FIELD POURED CONCREI'E COLLAR REQUIREO, ' BY OTHERS. � BY OTHERS. .50� [5.96"] ADJUST TO GRADE RIM: 524.26' RIM: 524.26' � - � 2.51' t' -I ' f � f i. . 8.00" [30.12"] �--- - c—3X Perk FilterT"" I 18.00" CARTRIDGES. � IE: 521.75'—� —' - � 4.83' I . . . . [57.96"] INLET, �16.00" OPENING � � � I I I � � K 087�HOOD 44.00" FOR �12.00" DIP. � • I I,--r.. L i� .�:C� - ' 4.00 4.00 EL: 519.43' e • 6.00" INLEf/BYPASS ASSEMBLY SK-0574 OUTLET, CONCREfE FALSE FLOOR. � �18.00" OPENING FOR 012.0�" HDPE, NEAR SIDE. SECTION A-A SIDE VIEW OF PERK FILTER VAULT - 4' X 6.5' 18" CARTRIAGES, 3 EACH PAGE 2 OF 3 EXHIBIT A (CONT) WA D O E G U L D NOTEs: C B # 1 1 �• CONCRETE COMPONENTS ARE DESIGNED FOR HS-20 TRUCK LNE LOAD AND MANUFACTUREO IN ACCORDANCE WfTH ASTM C890 dt C913. Perk FilterT'" Vault - 4' x 6.5� 2, DESIGN FlLL RANGE 1' MAXIMUM. �$�� Cartridges, 3 Each 3. GROUND WATER TABLE FOR STRUCTURAL CALCULATIONS IS ASSUMED AT TOP OF Treatment Flow Rate VAULT. 30.6 gpm / 0.068 cfs 4. DESIGN CONCRETE COMPRESSNE STRENGTI IS 5,000 PSI (MIN.) AT 28 DAYS. Total Flow Capacity 4.3 cfs 5. PRECAST DESIGN DOES NOT INCLUDE ANY LA7ERAL OR SURCHARGE LOADS FROM OTHER BUILDINGS OR FOUNDATIONS ADJACENT TO THIS STRUCTURE. THIS STRUCTURE SHALL BE KEPT A MINIMUM OF 1:1 RA710 AWAY FROM OTHER FOOTINGS OR FOUNDATIONS. B. THIS STRUCTURE IS DESIGNED TO THE PARAMEfERS NOTED HEREIN. PIEASE VERIFY THAT THESE PARAMEfERS MEET PROJECT RE�UIREMENTS (I.E. LNE LOAD, FILL RANGE, WATER TABLE�. IF DESIGN PARAMEfERS ARE INCORRECT, REVIEWING ENGINEER/AUTHORITY SHALL NOTIFY OLDCASTLE PRECAST UPON REVIEW OF THIS SUBMITfAI. 7. OVERSIZED HOLES TO ACCOMMODATE SPECIFfC PIPE lYPE MUST BE CONCENTRI( TO PIPE ID. AFTER PIPES ARE INSTAlLEO, ALl ANNUlAR SPACES SHALL 8E FILLED WITH A MINIMUM OF 3000 PSI CONCREfE FOR FULL THICKNESS OF PRECAST WALLS. B. CONTRACTOR RESPONSIBLE TO VERIFY ALL S►ZES, LOCATIONS AND ELEVATIONS OF OPENINGS. 9. CONTRACTOR RESPONSIBIE TO ENSURE ADEQUATE BEARING SURFACE IS PROVIDEO (I.E. COMPACTEO & LEVEL PER PROJECT SPECIFlCATIONS) 10. SECTION HOGHTS, SlA6/WALL THICKNESSES & KEYWAYS ARE SUBJECT TO CHANGE DUE TO AVAILABILITY & PRODUCTION PLANT CAPABILITY. 11. MAXIMUM PICK WEIGHT: BASE SECTION �11,500 LBS / 5.75 TONS. (ASSEMBLED WITH CARTRIDGES INSTALlEO). DESIGN RATES AND NU1E5 OF PERK FILTER VAULT — 4' X 6.5' 18" CARTRIAGES, 3 EACH PAGE 3 OF 3 EXHIBIT B � OPERATIONS & MAINTENANCE RECOMMENDATIONS O�erations and Maintenance Manual DISPERSION TRENCH Perforated pipes in dispersion trenches shall be kept open and clean. If the pipes appear to be clogged, they should be cleaned by high pressure flushing with water or flexible sewer rods. In cases where roots effectively block the drainage,the use of herbicides may be indicated.Whatever method of cleaning is used, consideration for erosion and sediment control is needed.The top of the dispersion trench should be kept free of leaves, debris, soil, moss, and other sources of clogging. If the surface or drain-rock becomes clogged, it should be excavated and replaced. The following pages are selections from Appendix A of the 2009 King County Stormwater Design Manual appiicable to this project: x N0.1 -DETENTION PONDS Maintenance Defect or Problem Condition When Maintenance is Needed Resuits Expected When Component Maintenance is Performed : Siie Trash and debris Any trash and debris which exceed 1 cubic foot TraSh and debris cleared per 1,000 square teet(this Is about equal to the from site. 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. Noxious Weeds Any noxious or nuisance vegetaGon which may Noxious and nuisance vegetation onstitute a hazard to CouMy personnel or the emoved according to appiicable ubliC. regulations.No danger of nowous egelation where County personnel r the pubifc migM normally be. Contaminanis and Any evidence of contaminants or poltulion such Materials removed and disposed pollution as oil,gasoline,concretes clurries or pain f according to applicabie regulations.Source control BMPs implemented if appropriate.No contaminanis present other than a urface oil fiim. Grass/groundc Grass or groundcover exceeds 18 inches in Grass or groundcover mowed to over height. a height no greater than 6 inches. Top or Side Rodent Any evidence of rodent holes if facility is acting as Rodents removed or destroyed an Siopes of Dam, hoies a dam or berm,or any evidence of water piping dam or berm repaired. Berm or throu h dam or berm via radent hoftes. Embankment Tree grow[h Tree growth threatens integrity of slopes, Trees do not hinder facility does not allow maintenance access,or performance or maintenance interteres with maintenance adivity.If trees activities. are not a threat or not inter#ering with access or maintenance,they do not need to be removed. Erosion Eroded damage over 2 inches deep where Siopes stabilized using cause of damage is still present or where there appropriate erosion control is potential for contlnued erosion.Any erosion measures.If erosion if occurring observed on a compacted slope. on compacted slope,a Ifcensed dvil engineer sho�d be consulted to resolve source of erosion. ' SetBement Any part of a dam,berm or embankment that Top or side slope restored to has settled 4 inches lower than the design design dimensions.If settlement elevation. is significant,a licensed civii engineer should be consulted to determine the cause of the settlement. Storage Area Sediment Accumulated sediment that exceeds 10°k of the Sediment cleaned out to accumulation designed pond depth. designed pond shape and depth; pond reseeded ff necessary to control erosion. Liner damaged(if Liner is visible or pond does not hold water as Liner repaired or replaced. applicabie) designed. Inlet/0utlet Pipe. Sediment Sedimenf fiBng 20%or more of the pipe. InleUoutlet pipes clear of accumulation sediment. Trash de6ris Trash and deBris accumulation in inleUoutlei No trash or debris in pipes. pipes(includes floatables and ran-floatabies). Damaged Cracks wider than i�-fnche at the join of the No cracks more than'/+-inches inlet/outlet pipes or any evidence of soil entering wide at the joint of the InleVoutlet at ihe joints of the inieUouilel pipes. pipe. Emergency Tree growth Tree growth impedes flow or threatens stability Trees removed. Overtiow/Spillway of spllway. Rock missing Only one layer of rock exists above native soil in Spiliway restored to design area five square feet or larger or any exposure standards. of naUve soi!on the spiilway. NO.4-CONTROL STRUCTURE/FLOW RESTRICTOR Maintenance Defect or Probiem Condition When Maintenance is Needed Results Expected When Component Malntenance ts PerFormed Structure Trash and debris Trash or debris of more than Y:cubic foot which is No Trash or debris located immedialely in front oF the catch basin blocking or opening or is blockir�g capacity of the catch basin potentially blocking by more than 10°/a. entrance to structure Trash or debris in ihe catch basin that exceeds No trash or debris in the �/�the depth from the bottom of basin lo invert the catch basin. lowest pipe inio or out of the basin. Deposits of garbage exceedi�g 1 cubic fooi in No condition present volume. which wouid attract or support the breeding of insects or rodents. 5ediment Sediment exceeds 60%of the depth irom the Sump of siructure contains bottom of the structure to the invert of the no sediment. 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 sectlon. Damage lo frame Corner of frame extends more than'/.inch past Frame(s even with curb. andlor iop slab cwb face into the street(If applicabie). Top slab has holes larger than 2 square inches or Top slab is free of holes and cradcs wider than'1.inch. cracks. Frame not siiting flush on top slab,i.e., Frame is sitting flush on top separation of more fhan'/,inch of the frame from slab. the top slab. Cracks in waiis or Cracks wider than%inch and longer than 3 feet, Catch basin is bottom any evidence of soil particles entering catch sealed and basin through cracks,or maiMenance person structurally judges that catch basin is unsound. sound. Cracks wider than h inch and longer than 1 fool No cracks more than�l inc at the joir�t of ar�y inleUoutlet pipe or any evidence wide at . of soil particles entering catch basin lhrough the joint of InieUoutlet pipe. cracks. SettlemenU Catch basin has settled more than 1 Inch or has Basin replaced or repaired rnisalignment roiated more than 2 inches out of allgnment. to design standards. Damaged pipe joinis Cracks wider than%rinch at the jolnt of the No cracks more than'/,- inieUoutlet pipes or any evidence of soil entering fnch wide at the joiM of ihe catch basin at the joint of the inleUoutlet inletloutlet pipes. P�P�- Contaminants and Any evidence of contaminants or pollution such Malerials removed and pollution as oil,gasoline,concrete slurries or paint. disposed of according to applicable regulatior�s. Source control BMPs implemented if appropriate. No cornaminants present other than a surface oil film. Ladder rungs Ladder is unsafe due to missing rungs Ladder meets design missing or�nsafe misalignment,rust,cracks,or sharp edges standards and allows mainienance person safe access. FROP T Section Damage T Section is not securely attached to structure wall T sec6on securely attached and outlet ptpe structure should support at least to wall and outlet pipe. 1,000 Ibs of up or down pressure. Structure is not in upright position(allow up to 10% Structure in correct position. irom piumb). Connections to outlet pipe are noi watertight or Connections lo ouitet pipe show sig�s of deteriorated grout. are water tight;strudure repaired or replaced and works as designed. Any holes—other than designed holes—in the Slruclure has no holes othe strudure. than designed holes. Cleanout Gate Damaged or Cleanout gate is missing. Replace cleanout gate. r�ssing Cieanout gate is not watertight. Gate is wateAight and works as designed. Gate cannot be moved up and down by one Gate moves up and down maintenance person. easily and is watertight. ChaiNrod leading to gate is missing or damaged. Chain fs in place and works as designed. Oriflce Plate Damaged or Cor�trol device is not working properly due to Plate is in place and works missing missing,out of plaoe,or bent orifice plate. as designed. Obstructions Any irash,debris,sediment,or vegetation blocking Plate is free of ail the plate obstructions and works as designed. Overflow Pipe Obstructions Any trash or debris blocking(or having the Pipe is free of all potential of blocking)the overtlow pipe. obstructions and works as designed. Deformed or Llp of overflow pipe is bend or deformed. Overtlow pipe does not damaged Bp atlow overtiow at an elevation lower than designed. IMeUOutlet Pipe Sediment Sediment filling 20%or more oi the pipe. InleVoutiet pipes clear of accumulation sediment. Trash and debris Trash and debris accumulated in inleNoullet No trash or debr(s in pipes. pipes(includes floatables and non-floatables). Damaged Cracks wider ihan%-fnch at the joint of the No cracks more than%,- inleUoutlet pipes or any evidence of sofl entering inch wide at the joint of at the joints of the inlet/outlei pipes. the inleUouilet pipe. Metal Grates(If Unsafe grete opening Grete with opening wider than 7/8 inch. Grade opening meets applicable) design standards. Trash and debris Trash and debris that is blodcing more than 20°h Grate free of trash and of grate surface. debris.Footnot to guidelines for disposal Damaged or missing Grate mtssfng or broken member(s)ot the grate. Grate is In place and meets design standards. Manhole CoverJLid CoverAid not in place CoverAid is missing or only partialiy in place. Covedlid protects opening Any open structure requires urgent to struciure. maintenance. Locking mechanism not Mechanism cannot be opened by one Me3chanism opens with working maintenance person with proper tools.Bolis proper tools. cannot be seated.Self-locking covedlid does not CoveNiid difflcuit to One maintenance person cannot remove Cover/lid can be removed remove covediid after applying 801bs.of Ifft and reinstalled by one maintenance person. NO.5-CATCH BASINS AND MANHOLES Mafntenance Defect or Problem Condition When Maintenance Is Needed Resufts Expected When Component Matntenance is Performed Structure Sediment Sediment exceeds 60°h of the depth from the Sump of catch basin bottom of ihe catch basin to the imeA of the contains no bwest pipe into or out of the catch basin or is sediment. within 6 inches of the invert of the lowest pipe fnto or out of the catch basin. Trash and debris Trash or debris ot more than'h cubic fooi which fs No Trash or debris located Immediateiy in front of the catch basin blocking or opening or is blocking capacity of the catch basin potentlaliy blocMng by more than 10%. entrance to catch basin. Trash or debris in the catch basin lhat exceeds No trash or debris in the �/3 the depth from the bottom of basin to invert the catch basin. bwest pipe into or out of the basin. Dead animals or vegetation that could generate No dead animals or odors that could cause complaints or dangerous vegetation present gases(e.g.,methane). wHhin catch basin. Deposits of garbage exceeding 1 cubic foot in No condition present volume. which woufd attract or support the breeding Damage to frame Comer of frame extends more than'/+incM past Frame is even with curb. and/or top slab curb face inlo the sUeet(If appGcable). Top slab has holes Iarger than 2 square(nches or Top slab is free of holes � cracks wider than'/,inch. and cracks. Frame not sitting flush on top slab,f.e., Frame is siiting Ilush on separation of more than'/.inch of the frame from top slab. ihe top slab. Cracks in walls or Cracks wider than%inch and longer than 3 feet, Catch basin is bottom any evidence of soil particles entering catch sealed and basin through cracks,or maintenance person stnicturally judges that catch basin is unsound. sound. Cracks wider than%inch and longer than 1 foot No cracks more than'/, at the joint of any inleUoutlet pipe or any evidence �nch wide at the jaint of lh of soil particles entering catch basin through InleUoutlet. cracks. SettiemenV Catch basin has settled more than 1 inch or has Basin replaced or mfsalignment rotated more than 2lnches out of aifgnment. repaired to design Damaged pipe Jofnts Cracks wider than'h-inch at the joint of the No cracks more than%.- InleUoutlet plpes or any evidence of soil entering inch wide at the joint of the catch basin at the jolnt of the inleUouUet InleUouUet pipes. Contaminanis and Any evidence of contaminants or pollution such Materials removed and potlution as oil,gasoline,concrete slurries or paint. disposed of according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants resent InIeUOutiet Pipe Sediment Sediment flllir�20�0 or mare of the pipe. InleUoutlet pipes clear of accumulation sediment. Trash and debris Trash and debrfs accumulated in inlet/outiet No trash or debris in pipes. pipes(Includes floatables and non-flaatables). Damaged Cracks wider than'/-Inch at the Joint of the No cracks more than%+- inleUoutlet pipes or any evidence of sofl entering Inch wide at the Joint oi at the joints of the inleUoutlet pipes. the inleVoutlet pipe. NO.5-CATCH BASINS AND MANHOLES Maintenance Defect or Problem Conditlon When Maintenance is Needed Results Expected When Component Maintenance is Pertormed Metai Grates Unsafe grate opening Grate with opening wider than 7!8 inch. Grate opening (Catch Basins) meets deslgn standards. Trash and debris Trash and debris that is blocking more than 20% Grate free of trash and of grate surface. debris.footnote to guidelines for disposal Damaged or missing Grate missing or broken member(s}of the grate. Grate is in place and Any open structure requfres urgent meets design siandards. mafntenance. Manhole CoverlLid CoveNlid not in place Coverflid is missing or only partially in place. Coverllid protecis Any open structure requires urgent opening to structure. maintenance. Locking mechanism Mechanism cannot be opened by one Mechanism opens with Not Working maintenance person with proper tools.Bolts proper tools. cannot be seated. Seif-locking cover/lid does not work. CoverRid difficuR to One mafntenance person cannot remove CoveNlid can be Remove cover/lid after applying 80 Ibs.of lift. removed and reinstailed by one mainienance person NO.6-CONVEYANCE PIPES AND DITCHES Maintenance Defect or Problem CondiBons When Maintenance is Needed Results Expected When Component Maintenance is Performed Pipes Sediment&debris Accumulated sediment or debris thai exceeds Water flows freely through accumulation 20%of the diameter of the pipe. pipes. VegetationJroots Vegetaiionlroots that reduce free movement of Water flows freely through water through pipes. pipes. Contaminants and Any evidence of contaminants or pollution such Materials removed and poliution as oil,gasoline,concrete slurries or paint. disposed of according to appiicable regulations. Source control�MPs implemented if appropriate. No contaminants present other than a surface ofl film. Damage to proteclive Protecfive coating is damaged;rust or corrosion is Pipe repalred or replaced. coating or corrosion weakening the siruciural iMegrity of any part of pipe. Damaged Any dent thal decreases the cross section area of Pipe repaired or replaced. pipe by more Ihan 20%or is determined to have weakened structural integrity of the pipe. Ditches Trash and debris Trash and debris exceeds 1 cubic foot per 1,000 Trash and debris square feet of ditch and slopes. cleared from ditches. Sediment Accumulated sediment that exceeds 20%of the Ditch deaned/flushed of accumulation design depth. ail sedtment and debris so that tt malches design. Noxious weeds Any noxious or nuisance vegetation which may Noxious and nuisance constftute a hezard to County personnei or the vegetation removed public. according to applicable regulations. No danger of noxious vegetation where County personnel or the pubiic might nortnally be. Coniaminants and Any evidence of contaminants or poilution such Materials removed and poliution as oil,gasoline,concrete siurries or paint. disposed oi according to applicable regula6ons. Source control BMPs implemented(f appropriate. No contaminants present other than a surface oll fllm. Vegetation Vegetation that reduces free movement oi water Water flows freely through through ditches. ditches. Erosion darnage to Any erosion observed on a ditch slope. Slopes are not eroding. slopes Rock linfng out of One layer or less of rock exists above native soil Replace rocks to design place or missing(If area 5 square feet or more,any exposed native standards. Applicable) soil. s � NO.8-ENERGY DISSIPATERS Maintenance Defect or Problem Conditions When Maintenance is Needed Results Expected When Component Malntenance ts Performed. Site Trash and debris Trash andlor debris accumulation. Dissipater clear of trash andlor debris. Coniaminants and Any evidence oi contaminants or pollution such Materials removed and polluiion as oii,gasoline,concrete slurries or paint. disposed of according to applicable regulations. Source controi BMPs implemented if appropriate. No contaminants present other than a surface oil 1flm. Rock Pad Missing or moved Oniy one layer of rock exists above native soil in Rock pad prevents Rock area five square feet or larger or any exposure of erosion. native soil. Dispersion Tnench Pipe plugged wiih Accumulated sediment that exceeds 20%of the Pipe sediment design depth. cleaned/flushed so that it matches design. Not discharging water �suai ev�lence of water discharging at Water discharges properly concenlrated poinis along trench{normal from feature by sheet condifion is a"shee!flov!'of water along trench). flow. Perforations plugged. Over 1!4 of perforations in pipe are plugged with Perforations freely debris or sediment. discharge flow. Water flowrs out top of Water flows out of distributor catch basin during No flow discharges "distributor"catch any storm less than the design storm. trom distributor catch basin. basin. Receiving area over- Water in receiving area is causing or has No danger of landslides. saturated potential of causing iandslide problems. Gabions Damaged mesh Mesh of gabion broken,twisted or deformed so Mesh is intact,no rock structure is weakened or rock may fatl out. missing. Corrosion Gabion mesh shows corrosion through more than All gabion mesh '/.of its gage. capable of containing rock Collapsed or Gabion basket shape detormed due to any Ali gabion baskets deformed baskets cause. intact,structure stands as designed. Missing rock Any rock missing that couid cause gabion to No rock missing. loose structural iMegrity. Manhole/Chamber Wom or damaged SVucture dissipating flow deteriorates to'/=or Structure is in no danger o post,baHies or side of original size or arry concentrated wom spot failing. chamber exceeding one square foot which would make structure unsound. Damage to wail, Cracks wider than%-inch or arry evidence of soil Manhole/chamber Is frame,bottom,and/or �tering the sUucture through cracks,or sealed and top slab maintenance inspection personnel determines struc[wally sound. ihat the structure is not structurally sound. Damaged pipe joints Cracks wider than%-inch at the joint of the No soil or water enters inleUoutlet pipes or any evidence of soil entering and no water discharges the structure ai the joir�t of the inletlouHet pipes. at ihe joint of inleUoutlet pipes. NO.9-FENCING Maintenance Defect or Problem Condition When Maintenance is Needed Results Expected When Component Malntenance Is Performed Site E�osion or holes under Erosion or ho�es more than 4 inches high and No access under ' fence 12-1 S inches wide permitting access through an the(ence. nin under a fence. Wood pots,boards Missing or damaged Missing or broken boards,posi out of plumb by No gaps on fence and cross members parls more fhan 6 inches or crass members broken due to missing or broken boards,post plumb to within 1 F� inches,cross members sound. Weakened by rotting or Any part showing structural deterioration due to All parts of fence insects rotting or insect damage are structurally sound. Damaged or Tailed post Concrete or metal attachments deteriorated or Posl foundation foundalion unable to support posts. capable of supporting posts even in strong wind. Metal Posts,rails and Damaged parts Post out of plumb more than 6 inches Post plumb to within fabric 1�inches. Top rails bent more than 6 inches Top rail free of bends greaterthan 1 inch. Any part of fence(inctuding post,top rails and Fence is aligned tabric)more than 1 foot aut of design alignmeni. and meets design standards. Missing or loose tension wire. Tension wire In place and holding fabda Deteriorated paint or Part or parts that have a rusting or scaling Structurally protective coaiing condiHon thai has affected structural adequacy. adequate post or pa►ts with a u�iform protective coating. Openings in fabric Openings in fabric are such that an 8-inch Fabric mesh diameter ball could fit through. openfngs within 50%of grid size. �. N0. 10-GATES/BOLLARDS/ACCESS BARRIERS Maintenance Detect or Problem Condition When Maintenance is Needed Resuits Expected When Component Maintenance is Pertormed Chain Link Fencing Damaged or missing Missing gate Gates in place Gate members Broken or missing hinges such that gate cannot Hinges intact and be easily opened and closed by a maintenance lubed.Gate is erson. workin freel . Gate is out of plumb more than B inches and Gate fs aligrred and more lhan 1 foot out of desfgn alignment. vertical. Missing stretcher bar,stretcher bands and ties Stretcher bar,bands and ties in place. Locking mechanism Locking devise missing,no-funclioning or does Locking mechanism does not lock gate not link to ali parts. prevents opening of ate. Opening in fabric Openings in tabric are such that an 8-inch Fabric rtresh diameter ball couid fit through. openings within 50%of rid size. Bar Gate Damaged or missing Cross bar does not swing open�closed,is Cross bar swings cross bar missing or is bent io where ii does not prevent fully open and vehicle access. closed and prevents vehide access. Locking mechanism Locking device missing,no-tunctioning or does Locktng mechanism does not lock gate not Itnk to all parts. prevents opening of gate. SuppoR post damaged Suppori post does not hold cross ber up. Cross bar heid up preventing vehicle access into faciliry. Bollards Damaged or missing eollard broken,missing,does not fit into suppoR No access for hole or hinge broken or missing. motorized vehicle access into tacility. Does not lock Locking assembty or lock missing or cannot be No access for attached to lock bollard in place. motorized vehiGe access into facility. Boulders Disiodge Boulders not located to prevent motorized No access for vehicle access. motorized vehicle access inio tacility. Circumvented Motwized vehicles going around or between No access for ba�lders. motorized vehicte access into facility. N0.11 -GROUNDS(LANDSCAPING) Mai�tenance Defect or Problem Condition When Maintenance Is Needed Resuits Expected When Component Maintenance Is Performed Site Trash or litter Any and debris which exceed 1 cubic fool per Trash arxl debris 1,000 square feet(this is aboui equal to the cleared from site. amount of trash it would take to fili up one standard size office garbage can).In general, ihere should be no visual evidence of dum in . Noxious weeds Any noxious or nuisance vegetation which may Noxious and constitute a hazard to County personrrel or the nuisance vegetation public. removed according to appiicabfe regulations.No danger of rtoxious vegetation where County personnel or the public mlght normaliy be. Contaminants and Any evidence of contaminants or pollutlon such tulaterlals removed pollutio�. as oil gasoli�re,concrete slurrles or paint. and disposed of according to appiicable regulations.Source control BMPs implemented if appropriate.No contaminants present other than a surface oil film. Grasslgroundcover Grass or groundcover exceeds 18 inches in Grass or height. groundcover mowed to a height no greater than 6 inches. Tree and shrubs Hazard Any tree or Gmb of a tree identified as having a Trash and debris potentiai to tall and cause properly damage or cieared from site. threaten human life.A haza�d tree fdentified by a qualifled arborist must be removod as soon as posslbia. Damaged Limbs or parts oi trees or shrubs ihat are split or Trees and shrubs broken which affect more than 25°�of the total with less than 5°r6 of toliage oF the iree or shrub total foltage with split or brotcen limbs. Trees or shrubs that have been blown down or No blown down knocked over. vegetation or knocked aver vegetation.Trees or shrubs free of injury. Trees or shrubs which are not adequately Tree or shrub in suppo�ted or are leaning over,causing exposure place and of the roots. adequately supported;dead or diseased trees removed. N0.12-ACCESS ROADS Maintenance Defect or Probiem Conditions When Maintenance is Needed Resutts Ezpected When Component AAainteoance Is Performed. Site Trash and debris Trash andlor debris exceeds 1 cubic foot per 1,000 Roadway driveable square feet(i.e.,trash and debris would fili up one by maintenance standards size garbage can). vehicles. Debris which could damage vehicle tires or prohibi Roadway driveable use of road. by maintenance vehicles. Contaminants and Any evidence of contaminants or pollution such Materials removed and poilutlon as oil,gasoline,concrete slurries or paint. disposed oi according to applicable regulations. Source control BMPs implemented if appropriate. No contaminants present other than a surfa�e oil film. Block roadway Any obsiruction which reduces clearance above Roadway overhead dear road surtace to less than 14 feet. to 14 feet high. Any obslruction restricting the access to a 10- At feast 12-foot of width to 12 foot width for a distance of more than 12 on access road. feet or any point restricting access to less than a 10 foot width. Road surface Erosion,settlement, q�y surface defect which hinders or prevents Road driveable by potholes,soft spois, maintenance access. maintena�e vehicles. ruts Vegetation on road Trees or other vegetation prevent access to Maintenance vehicles can surface facility by maintenance vehicles. access facilfty. Shoulders and ditches Erosion Erosion within 1 foot of the roadway more than Shoulder free oi 8 inches wide and 6 inches deep. erosion and matching the surrounding road. Weeds and brush Weeds and brush exceed 18 Inches in height or Weeds and brush cut hinder maintenance access. to 2 inches In height or cleared in such a way as to allow mainienance acxess. Modular grid Contaminants and Any evidence of contaminants or pollutlon such Materlals removed and pavement Popution as oil,gasoline,concrete slurries or palnt. disposed oi according io appficable regulations. Source control BMPs implemented if appropriate.No contaminants present other than a surface oil I . Damaged or misstng Access surface compacted because of broken on Access road missing modular block suriace restored so road Infiltrates. �; � Oldcastle Stormwater Solutions � INSPECTION AND MAINTENANCE GUIDE __ __.. ..._ __. _. . j.._.��.�_ _ ._ .�.--- . _ . � 3 � � _ � � � � � � � � ,� �_�. �,_ _ . �_L� . �� - � �� ; f, ��p� ,�_ � = .�� f. ; � November 4,2015 Version 1 800-579-8819 ( oldcastlestormwater.com stormcapture.com � PerkFilter� Inspection and Maintenance Guide PerkFiiterT"" Media Filtration System Description The PerkFilter is a stormwater treatment device used to remove pollutants from urban runoff. Impervious surfaces and other urban and suburban landscapes generate a variety of contaminants that can enter stormwater and pollute downstream receiving waters.The PerkFilter is a media-filled cartridge fittration device designed to capture and retain sediment, gross solids, metals, nutrients, hydrocarbons, and trash and debris.As with any stormwater treatment system,the PerkFilter requires regular periodic maintenance to sustain optimum system performance. Function The PerkFilter is a water quality treatment system consisting of three chambers:an inlet chamber,a filter cartridge treatment chamber,and an outlet chamber(Figure 1). Stormwater runoff enters the inlet chamber through an inlet pipe,curb opening,or grated inlet.Gross solids are settled out and floating trash and debris are trapped in the inlet chamber. Pretreated flow is then directed to the treatment chamber through an opening in the bafFle wall between the inlet chamber and treatment chamber.The treatment chamber contains media-filled filter cartridges(Figure 2)that use physical and chemical processes to remove pollutants. During a storm event, runoff pools in the treatment chamber before passing radially through the cylindrical cartridges from the outside surface,through the media for treatment,and into the center of the cartridge.At the center of the cartridge is a center tube assembly designed to distribute the hydraulic load evenly across the surface of the filter cartridge and control the treatment flow rate.The center tube assembly discharges treated flow through the false floor and into the outlet chamber.A draindown feature built into each cartridge allows the treatment chamber to dewater between storm events. Precast concrete vault Filtercartridge treatment chamber Access Covers lnlet chamber �"� ` �` : ,M1� - .. - � �.. ` Outlethood �w_� � �. � Inlet pipe �� , � � �,. Outlet pipe :� � ' Bypass assembly Concrete false floor Outlet chamber Figure 1.Schematic of the PerkFilter system. 2015 Oldcastle Precast, Inc. 2 11/4/2015_V1 �< PerkFliter�inspection and Maintenance Guide All PerkFifter systems include a high flow bypass assembly to divert flow exceeding the treatment capacity of the filter cartridges around the treatment chamber.The bypass assembly routes peak flow from the inlet chamber directly to the outlet chamber, bypassing the treatment chamber to prevent sediment and other captured pollutants from being scoured and re-entrained by high flow. Treated flow and bypass flow merge in the outlet chamber for discharge by a single outlet pipe. �Ventfube � Outer media layer-- � PerkFilter�Inspection and Maintenance Guide � Vent tube(4"dia.) � Top stacked cartridge :;. / �� ,f Inner interconnector coupling(2"dia.) - -�'f Outer interconnector coupling(4"dia.) r---' -- � � �� , ' : Single or bottom stacked cart�idge �`.; Urethane bottom cap r...--`'��J' Slip coupier(2°dia.) �-'' �-„".�-' Figure 3.Schematic of stacked cartridges and connector components. ; 2015 Oldcastle Precast, Ina 4 11/4/2015_Vi , PerkFilter�Inspection and Maintenance Guide £` Maintenance Overview State and local regulations require all stormwater management systems to be inspected on a regular basis and maintained as necessary to ensure performance and protect downstream receiving waters. Maintenance prevents excessive pollutant buildup that can limit system performance by reducing the operating capacity and increasing the potential for scouring of pollutants during periods of high flow. Inspection and Maintenance Frequency The PerkFilter should bs inspected on a regular basis,typically twice per year, and maintained as required. Initially, inspections of a new system should be conducted more frequently to help establish an appropriate site-specific inspection frequency.The maintenance frequency will be driven by the amount of runoff and pollutant loading encountered by a given system. In most cases, the optimum maintenance interval will be one to three years. Inspection and maintenance activities should be perFormed only during dry weather periods. Inspectlon Equipment The following equipment is helpful when conducting PerkFilter inspections: • Recording device(pen and paperform,voice recorder, iPad,etc.} • Suitable clothing(appropriate footwear,gloves, hardhat,safety glasses,etc.) • Traffic control equipment(cones,barricades,signage,flagging,etc.) • Socket and wrench for bolt-down access covers • Manhole hook or pry bar • Flashlight • Tape measure • Measuring stick or sludge sampler • Long-handled net(optional) Inspection Procedures PerkFilter inspections are visual and may be conducted from the ground surface without entering the unit.7o complete an inspection, safety measures including traffic control should be deployed before the access covers are removed.Once the covers have been removed,the following items should be checked and recorded(see form provided at the end of this document)to determine whether maintenance is required: • Inspect the internal components and note whether ihere are any broken or missing parts. In the unlikely event that internal parts are broken or missing,contact Oldcastle Stormwater Solutions at (800)579-8819 to determine appropriate corrective action. • Note whether the inlet pipe is blocked or obstructed.The outlet pipe is covered by a removable outlet hood and cannot 6e observed without entering the unit. 2015 Oldcastle Precast, Inc. 5 11/4/2015_V1 PerkFilter(Inspection and Maintenance Guide • Observe, quantify,and record the accumulation of floating trash and debris in the inlet chamber. The significance of accumulated floating trash and debris is a matter of judgment.A long-handled net may be used to retrieve the bulk of trash and debris at the time of inspection if full maintenance due to accumulation of floating oils or settled sediment is not yet warranted. • Observe,quantify, and record the accumulation of oils in the inlet chamber.The significance of accumulated floating oils is a matter of judgment. However,if there is evidence of an oil or fuel spill, immediate maintenance by appropriate certified personnel is warranted. • Observe, quantify,and record the average accumulation of sediment in the inlet chamber and treatment chamber.A calibrated dipstick,tape measure,or sludge sampler may be used to determine the amount of accumulated sediment in each chamber.The depth of sediment may be determined by calculating the difference between the measurement from the rim of the PerkFilter to the top of the accumulated sediment and the measurement from the rim of the PerkFilter to the bottom of the PerkFilter structure. Finding the top of the accumulated sediment below standing water takes some practice and a light touch,but increased resistance as the measuring device is lowered toward the bottom of the unit indicates the top of the accumulated sediment. • Finally,observe,quantify,and record the amount of standing water in the treatment chamber around the cartridges. If standing water is present,do not include the depth of sediment that may have settled out below the standing water in the measurement. Maintenance Triggers Maintenance should be scheduled if any of the following conditions are identified during the inspection: • Internal components are broken�r missing. • Inlet piping is obstructed. • The accumulation of floating trash and debris that cannot be retrieved with a net and/or oil in the inlet chamber is significant. • There is more than 6"of accumulated sediment in the inlet chamber. • There is more than 4"of accumulated sediment in the treatment chamber. • There is more than 4"of standing water in the treatment chamber more than 24 hours after end of rain event. • A hazardous material release(e.g.automotive fluids)is observed or reported. • The system has not been maintained for 3 years(wet climates)to 5 years(dry climates). Mainfenance Equipment The following equipment is helpful when conducting PerkFilter maintenance: • Suitable clothing (appropriate footwear,gloves, hardhat,safety glasses, etc.) • Traffic control equipment(cones, barricades, signage, flagging, etc.) • Socket and wrench for bolt-down access covers • Manhole hook or pry bar • Confined space entry equipment, if needed 2015 Oldcastle Precast, Inc. g 11/4/2015_V1 PerkFilter�Inspection and Maintenance Guide • Flashlight ' • Tape measure • 9/16"socket and wrench to remove hold-down struts and filter cartridge tops • Repiacement filter cartridges • Vacuum truck with water supply and water jet Contact Oldcastle Stormwater Solutions at(800)579-8819 for repiacement fiiter cartridges. A lead time of four weeks is recommended. Maintenance Procedures Maintenance should be conducted during dry weather when no flow is entering the system.Confined space entry is necessary to maintain vault and manhole PerkFilter configurations.Only personnel that are OSHA Confined Space Entry trained and certified may enter underground structures.Confined space entry is not required for catch basin PerkFilter configurations.Once safety measures such as traffic control are deployed,the access covers may be removed and the following activities may be conducted to complete maintenance: • Remove floating trash,debris,and oils from the water surface in the inlet chamber using the extension nozzle on the end of the boom hose of the vacuum truck.Continue using the vacuum fruck to completely dewater the inlet chamber and evacuate all accumulated sediment from the inlet chamber. Some jetting may be required to fully remove sediment.The inlet chamber does not need to be refilled with water after maintenance is complete.The system will�II with water when the next storm eventoccurs. • Remove the hold-down strut from each row of filter cartridges and then remove the top of each ca�tridge(the top is held on by four 9/16"bolts)and use the vacuum truck to evacuate the spent media,When empty,the spent cartridges may be easily lifted off their slip couplers and removed from the vault.The couplers may be left inserted into couplings cast into the false floor to prevent sediment and debris from being washed into the outlet chamber during washdown. • Once all the spent cartridges have been removed from the structure,the vacuum truck may be used to evacuate alt accumulated sediment from the treatment chamber.Some jetting may be required to fully remove sediment.Take care not to wash sediment and debris through the openings in the false floor and into the outlet chamber.All material removed from the PerkFilter during maintenance including the spent media must be disposed of in accordance with local, state,and/or federal regulations. In most cases,the material may be handled in the same manner as disposal of material removed from sumped catch basins or manholes. • Place a fresh cartridge in each cartridge position using the existing slip couplers and urethane bottom caps. If the vault is equipped with stacked cartridges,the existing outer and inner interconnector couplers must be used between the stacked cartridges to prvvide hydraulic connection.Transfer the existing vent tubes from the spent cartridges to the fresh cartridges.Finally, refit the struts to hold the fresh cartridges in place. • Securely replace access covers,as appropriate. � Make arrangements to return the empty spent cartridges to Oldcastle Stormwater Solutions. 2015 Oldcastle Precast, Inc. 7 11/4/2015 V1 i PerkFilter Inspection and Maintenance Log :. _ : t �; Locatlpn - . ..; - Structure Conf�,guratton and Size� , �nspeatioh Date ; ; . ; CI V��alf -fieet;x ; fe�t �.�' - _ - I � Manhole, wdiameter ,. , . , ; �,.Catch Basin = : feet x _ fieet:- , � ., , ; • Number and Heiglit of Cartridges - ; ,; ., - _ < - ,_ , Count <each ❑ 12".t7 18° ��24" CI 3p" ,; , ; � . Media Type; ' = . � ' ❑ ZPC�„Perh#e O Othe�::. � _ ' Condition of Internal Components Notes: � ❑ Good ❑ Damaged ❑ Missing ! lnlet Pipe B/ockage or Obstruction Notes: E � 0 Yes ❑ No Floating Trash and Debr3s Notes: ❑ Significant ❑ Not Significant � . Floating Oils Notes: � ; ❑ Significant ❑ Not Significant ❑ Spill � 1 Sediment Depth In lnlet Chamber Notes: � , ❑ Inches of Sediment: i Sediment Depth in Treatmenf Chamber Notes: ! O Inches of Sediment: I Standing Water in Treatmenf Chamber Notes: � 0 Inches of Standing Water: ; Main#enance Requ�red ._; C7 Yes. Schsdule Mamtenance�_[� No-lnspect Again,�n � Months _ � . . . . .. ;. ,. . ... � � � ; i ' , . � EXHIBIT C LEGAL DESCRI PTION � � ► LEGAL DESCRIPTION THAT PORTION OF THE NORTHWEST QUARTER OF THE SOUTHWEST QUARTER OF SECTION 11, TOWNSHIP 23 NORTH, RANGE 5 EAST,WILLAMETTE MERIDIAN, IN KING COUNTY,WASHINGTON, DESCRIBED AS FOLLOWS: BEGINNING AT A POINT 15 FEET NORTH OF THE SOUTHWEST CORNER OF THE NORTH HALF OF SAID NORTHWEST QUARTER OF THE SOUTHWEST QUARTER OF SAID SECTION 11; THENCE EAST TO A POINT 645 FEET WEST OF THE EAST LINE OF SAID SUBDIVISION; THENCE NORTH 157.5 FEET TO THE SOUTH LINE OF THAT TRACT DESCRIBED UNDER RECORDING NO. 5481257; THENCE WEST 675 FEET, MORE OR LESS,ALONG SAID SOUTH LINE,TO THE WEST LINE OF SAID SUBDIVISION; THENCE SOUTH ALONG SAID WEST LINE TO THE POINT OF BEGINNING; EXCEPT THE WEST 30 FEET THEREOF, RESERVED FOR 148T"AVENUE SOUTHEAST(NILE AVENUE NORTHEAST). TOGETHER WITH TRACT L,WINDWOOD DIVISION 3, ACCORDING TO THE PLAT THEREOF, RECORDED IN VOLUME 198 OF PLATS, PAGES 22 THROUGH 27, RECORDS OF KING COUNTY,WASHINGTON. SUBJECT TO AN EASEMENT OVER TRACT L FOR TELEPHONE FACILITIES THE LOCATION OF WHICH IS NOT DETERMINED AS RECORDED UNDER RECORDING NUMBER 3575586.