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HomeMy WebLinkAboutContract 49540 CITY SECRETARY CONTRACT NO. 18g1O1� a w STORMWATER FACILITY MAINTENANCE AGREEMENT 8 THIS AGREEMENT, made and entered into this day of 9. , by annd�� 1between L1. , acting by and through hereinafter referred to" as "Landowner", and the City of Fort Worth,hereinafter referred to as"City". WITNESSETH WHEREAS, the Landowner is the owner of certain real property described as an approximately 1.25 acre tract located in the Brittain & Crawford Survey, Block 128 Chamberlin Arlington Heights Addition Lot 25R, Tarrant County, Texas according to the deed recorded in Volume 63, Page 21, Deed Records, Tarrant County, Texas, hereinafter called the"Property". WHEREAS, the Landowner is proceeding to build on and develop the Property according to the Site Plan/Subdivision Plan known as SP-16-004 hereinafter called the "Plan", which is expressly made a part hereof, as approved or to be approved by the City and the Landowner provides for management of Stormwater within the confines of the Property; and WHEREAS, the City and the Landowner, and their successors and assigns, agree that the health, safety and welfare of the residents of the City of Fort Worth, Texas require that on-site Stormwater Management Facilities be constructed and maintained on a portion of the Property; and OFFICIAL RECORD CITY SECRETARY FT.WORTH,TX STORMWATER FACILITY MAINTENANCE AGREEMENT 1 Rev.11/17/2016 WHEREAS, the City requires that on-site Stormwater Management Facilities ("Facility") as shown on the Plan be constructed and adequately maintained by the Landowner, its successors and assigns,the location and dimensions of which is shown and more particularly described by metes and bounds in the attached Exhibit "A" ("Facility Property"); and NOW, THEREFORE, in consideration of the foregoing premises, the mutual covenants contained herein, and the following terms and conditions, the parties hereto agree as follows: 1. The Landowner, its successors and assigns, shall adequately construct and maintain the on-site Stormwater Management Facility ("Facility") at no expense to the City of Fort Worth in accordance with the design specifications for the Facility, attached as Exhibit`B", and the current standards then in force and effect in the City of Fort Worth and with the Operations and Maintenance Plan attached to this Agreement as Exhibit "C". The Stormwater Facility includes all pipes, channels or other conveyances built to convey Stormwater to the facility, as well as all structures, improvements, and vegetation provided to control the quantity and quality of the Stormwater. Adequate maintenance is herein defined as good working condition so that these facilities are performing their design functions. The Stormwater Structural Control Maintenance Checklists, attached to this Agreement as Exhibit "D", are to be used to establish what good working condition is acceptable to the City. 2. The Landowner, its successors and assigns, shall inspect the Facility and submit an inspection report to the City annually. The purpose of the inspection is to assure safe and proper functioning of the Facility. The inspection shall cover the entire Facility, berms, outlet structure, pond areas, access roads, etc. Components of the Facility, which need maintenance or replacement to perform their design function, shall be noted in the inspection report along with the corrective actions to be taken. STORMWATER FACILITY MAINTENANCE AGREEMENT 2 Rev.11/17/2016 3. The Landowner, its successors and assigns, hereby grant permission to the City, its authorized agents and employees, to enter upon the Property and to inspect the Facility Property whenever the City deems necessary. The purpose of inspection is to follow-up on reported deficiencies and/or to respond to citizen complaints. The City shall provide the Landowner, its successors and assigns, copies of the inspection findings and a directive to commence with the repairs if necessary. 4. In the event the Landowner, its successors and assigns, fails to maintain the Facility in good working condition as specified herein, the City, its authorized agents and employees, may enter upon the Facility Property and take whatever steps necessary to correct deficiencies identified in the inspection report and to charge the costs of such repairs to the Landowner, its successors and assigns. It is expressly understood and agreed that the City is under no obligation to routinely maintain or repair said Facility, and in no event shall this Agreement be construed to impose any such obligation on the City, such oblisation is Landowner's. 5. The Landowner, its successors and assigns, will perform the work necessary to keep the Facility in good working order as appropriate. In the event the City pursuant to this Agreement,performs work of any nature, or expends any funds in performance of said work for labor, use of equipment, supplies, materials, and the like, the Landowner, its successors and assigns, shall reimburse the City upon demand, within thirty(30) days of receipt thereof for all actual costs incurred by the City hereunder. In the event that Landowner or its successors or assigns fail to pay the City for the costs incurred under this section, the City shall impress a lien for the costs of such work upon other lots owned by the Landowner. Such lien shall be perfected by filing in the office of the County Clerk of Tarrant County, Texas an affidavit identifying the property to be charged with such lien, stating the amount thereof, and making reference to this Agreement. 6. This Agreement imposes no liability of any kind whatsoever on the City. THE LANDOWNER AGREES TO HOLD THE CITY HARMLESS FROM STORMWATER FACILITY MAINTENANCE AGREEMENT 3 Rev.11117/2016 ANY LIABILITY IN THE EVENT THE FACILITY FAILS TO OPERATE PROPERLY. LANDOWNER COVENANT AND AGREE AND DOES HEREBY INDEMNIFY, HOLD HARMLESS AND DEFEND THE CITY OF FORT WORTH, ITS AGENTS, SERVANTS AND EMPLOYEES FROM AND AGAINST ALL COSTS, EXPENSES, LOSSES, DAMAGES, CLAIMS OR CAUSES OF ACTION WHATSOEVER ARISING, OR WHICH MIGHT ARISE, FROM THE FAILURE OF LANDOWNER OR ANY FUTURE OWNERS OF THE ABOVE FACILITITY PROPERTY TO MAINTAIN THE FACILITY, INCLUDING, BUT NOT LIMITED TO THE BED AND BANKS OF THE DETENTION POND; ANY DAMAGES CAUSED TO PERSON OR PROPERTY DUE TO (1) FLOODING OF THE POND AND ITS BANKS, (2) SLOPE FAILURE OF THE BANKS OF THE POND, OR(3) FAILURE OF THE POND OR ITS BANKS TO OPERATE IN A MANNER CONSISTENT WITH CITY OF FORT WORTH CRITERIA TO PERFORM ANY OTHER DUTIES OR OBLIGATIONS HEREUNDER. 7. Landowner covenants and agrees that no habitable building shall be erected within the drainage easement outlined on Exhibit "A" but this paragraph shall not preclude construction of other improvements within the drainage easement, which do not impede drainage. Landowner covenants and agrees that no habitable building shall be erected on the above property abutting such easement which shall have a finished floor at an elevation less than two feet above the maximum depth of water in the detention pond which would occur during a 100 year frequency flood. 8. This Agreement shall be recorded among the land records of Tarrant County, Texas, shall constitute a covenant running with the land, and shall be binding on the Landowner, its administrators, executors, assigns, heirs and any other successors in interests, including any property owners association. STORMWATER FACILITY MAINTENANCE AGREEMENT 4 Rev.11/17/2016 [SIGNATURE PAGE FOLLOWS] Executed this�/ day of'14 20/;7 Lando er City of Fort Worth Na e: Jesus J. Chapa Assistant City Manager Title: S/ Approved as to Form and Legality ,Gk Assistant City A orney/&,m&N66iao,*'' ATTEST �0RT wo,�� Of 15- F-- Ci S cr ar V NO M&C REQUIRED OFFICIAL RECORD CITY SECRETARY FT.WORTH,TX STORMWATER FACILITY MAINTENANCE AGREEMENT 5 Rev.11/17/2016 STATE OF TEXAS § COUNTY OF TARRANT § This instrument was acknowledged before me on iaf /�F?�/7 by Jesus J. Chapa,Assistant City Manager of the City of Fort Wo on behalf of the City of Fort Worth. C TRIKINYA L JOHNSON S/ •Oar"Y ' .. f�. .Notary Public,State of Texas Comm. Expires 04-17-2018 ]votary ublic tate of Texas Notary ID 1238832.0 STATE OF TEXAS § COUNTY OF TARRANT § Befo a me, the undersigned authority on this _, � day of n 2017, personally appeared k CJ known to me to be the person whose name is subscribed to the foregoing instrument and acWowledged to , Mme at the same is the act of an th t h �executed the same as its and a the act of such,NjScjLL � ie�€ r the purposes and consideration expressed in the foregoing instrument. NdtatYublic, State of Texa JANNETT RUIZ Notary Public,State of Texas Commission Expires February 03, 2019 OFFICIAL RECORD CITY SECRETARY FT,.WORTH,TX STORMWATER FACILITY MAINTENANCE AGREEMENT 6 Rev.11/17/2018 Contract Compliance Manager: By signing I acknowledge that I am the person responsible for the monitoring and administration of this contract,including ensuring all performance and reporting requirements. Name of ployee ,U i20 f;5� Title) OFFICIAL Kv�IRD CITY SECRETARY FT.WORTH,TX it i jill i Igo - it I,- a i Z& 11aj�01 1. fit 14 J1 jig J11 S1. 7 It IM 'E.,z R7 a 0 OD E Z� zu;;�Rm z z Uiz J; zz E- zwW 04 CQ p >,—oo Hp 9-T12 is "a d0dwa Ow E-Z FN S a elow 11 4 L) it om Z5 !k, Niqla SHE .14 LU co .00 Yp WL PZCIP 11A.1 R'S 1�44 '03 Fig.. W, 22 M." z roll 100� LK qr,LOU . .00,01 2 I 01 TARIM EXHIBIT A THE PARC PRIVATE DRAINAGE EASEMENT A PART OF LOT 25R, BLOCK 128 CHAMBERLIN ARLINGTON HEIGHTS JACKSON INMAN SURVEY, ABSTRACT NO. 825 CITY OF ARLINGTON, TARRANT COUNTY, TEXAS Being a 3,921 square foot(0.09 acres)tract or parcel of land situated in the Jackson Inman Survey,Abstract No. 825, City of Arlington, Tarrant County, Texas, and being a part of Lot 25R, Block 128, Chamberlin Arlington Heights, an addition to the City of Arlington according to the plat recorded in Cabinet A, Slide 10297, Plat Records, Tarrant County, Texas, as conveyed to Rock Life Holdings, L.P. by Special Warranty Deed With Vendors Lien recorded in Instrument No. D213307666, Official Public Records, Tarrant County, Texas, and being more particularly described as follows: COMMENCING at a TXDOT Monument found for corner in the south line of Interstate Highway No. 30(a.k.a. West Freeway, a variable width right-of-way) and the cut-off line between the south line of said Interstate Highway No. 30 and the west line of Sanguinet Street (a 60' right-of-way), said TXDOT Monument being the most northerly northeast comer of said Lot 25R at the beginning of a curve to the right; THENCE in a southwesterly direction, along the common line between said Lot 25R and said Interstate Highway No. 30 and said curve to the right whose chord bears South 870 52'52"West a distance of 27.92 feet, having a radius of 5,749.58 feet, a central angle of 000 16'42", and an arc length of 27.92 feet to a point for corner in the south line of said Interstate Highway No. 30 and the north line of said 25R, at the end of said curve to the right; THENCE South 61°43'43" East, departing the south line of said Interstate Highway No. 30, over and across said Lot 25R, a distance of 14.30 feet to a 1/2 inch iron rod with yellow plastic cap stamped"RLG INC"set for comer and the POINT OF BEGINNING; THENCE continuing over and across said Lot 25R the following courses and distances: South 61°43'43" East a distance of 24.64 feet to a 1/2 inch iron rod with yellow plastic cap stamped"RLG INC"set for comer; South 28° 16' 17"West a distance of 2.17 feet to a 1/2 inch iron rod with yellow plastic cap stamped"RLG INC"set for corner; West a distance of 18.68 feet to a 1/2 inch iron rod with yellow plastic cap stamped"RLG INC"set for corner; South a distance of 20.00 feet to a 1/2 inch iron rod with yellow plastic cap stamped "RLG INC"set for corner: West a distance of 120.00 feet to a 1/2 inch iron rod with yellow plastic cap stamped"RLG INC"set for corner; North a distance of 31.50 feet to a 1/2 inch iron rod with yellow plastic cap stamped"RLG INC"set for corner; SHEET 1 OF 3 26,596X EXHIBIT A THE PARC PRIVATE DRAINAGE EASEMENT A PART OF LOT 25R, BLOCK 128 CHAMBERLIN ARLINGTON HEIGHTS JACKSON INMAN SURVEY, ABSTRACT NO. 825 CITY OF ARLINGTON, TARRANT COUNTY, TEXAS East a distance of 118.00 feet to a 1/2 inch iron rod with yellow plastic cap stamped"RLG INC" set for corner; North a distance of 2.08 feet to the POINT OF BEGINNING and containing 3,921 square feet or 0.09 acres, more or less. BASIS OF BEARINGS:The west line of Sanguinet Street(S00034'23"W)according to the plat recorded in Cabinet A, Slide 10297, Plat Records, Tarrant County,Texas. h (� GWESoRY JCAVATAIO rego J av io R.P.L.S. o. 6389 8389 �� 06/0 7 �9,ys��y0e SURd SHEET 2 OF 3 26,596X EXHIBIT A 0 15 30 60 INTERSTA TE HIGHWA Y N0. 30 PROPOSED PUINJC (FEET) (A.K.A. WEST FREEWAY, MOT POC ORMAW E45ad9ff A VARIABLE IMDTH RIGHT—OF—WAY) MONUMENT BY SEPARATE INSTRUMENT 1 inch = 30 ft. (-WADED AREA) 5148-W, L=295.21' ,\` Cl 54525 00 E L8 L9 � �? 't aRAxFaRO-(CM)PRI VA X DRAINAGE EASEMENT POB L 4 4i 3,921 SO.FT. 4) L3 3 0.09 ACRES V) 1 LG L6 .• H"� W LOT 25R, BLOCK 128 CHAMBERUN ARLINGTON HEIGHTS h p CABINET A, SLIDE 10297, P.R.T.C.T. m y ,- Z ROCK LIFE HOLDINGS, L.P. +� INST. NO. D213307666. O.P.R.T.C.T. 100, //..M •(aw) 39a 78' S LEGEND L 0CKE A VENUE L D�''I" EASEMENT OPERTYLUNE (70'RIGHT—OF—WAY) YCIRF ........ 1/2•IRON ROD WIN YELLOW PLAS77C L �F ,F CAP STAMPED =•FOUND IRF ........ IRON ROD FOUND (CM) ........ CON7ROLUNG MONUMENT P.R.rC r ........ PLAT RECORDS, TARRANT COUNTY, EY GREGORY i GAVAT_AIO O.P.R.T.C.T. ........ OFRCYAL PUBLIC RE-CORDS, TARRANT COUNTY, 7X •»•» •••---.-• INST. NO. ........ INSTRUMENT NUMBER6.9 �. 89 Pvd' VOL. ........ HXUME 9 ESS10?"(�� PG. ........ PAGE POC ........ POVNT OF COMMENCING P06 ........ POINT OF BEGINNING 01 LIME TABLE uNE eEARYNc LETVGTT� ego va taio R.P. .S No. 6389 L 1 561�J 4J� 14.JO' L2 S614,3'43T 24.464' BASIS OF BEARINGS- 77IE KEST UNE O SANGUINET STREET (S 00' 34' 23" W) ACCORDING TO THE PLAT RECORDED IN CABINET A, SLIDE 10297, PLAT RECORDS, LJ S2876"17'W 217' TARRANT COUNTY, TEXAS, AS MONUMEN7ED ON 7HE GROUND. L4 MUST law, L5 SOUTH 2aoo, CONTROLLING MONUMENTS. AS SHOWN. L6 W'ST 12aO0' ALL SUBJECT PROPERTY CORNERS ARE MONUMEN7ED WITH A 1/2 INCH IRON ROD L7 NOR7H 31.50' WITH YELLOW PLAS77C CAP STAMPED REG INC" UNLESS OTHERiWSE N07ED. LB EAST MOO, THE PARC L9 NORTN 20r PRIVATE CURW M&E DRAINAGE EASEMENT CWW Da TA RADIUS I rANWNr I LENGTH I at BRA aia A PART O/Fr�J / q Cl 107642-15749.58-1 1.196' 27.92' 5875252-W127.92' LOT 25R, BLOCK 128 CHAMBERLIN ARLINGTON HEIGHTS RAYMOND L. COODSON JR., INC. JACKSON INMAN SURVEY, ABSTRACT NO. 825 12001 N. CENTRAL EXPY, STE 300 DALLAS, TX. 75243 CITY OF ARLINGTON, TARRANT COUNTY, TEXAS 214-739-8100 r1gOrlginc.cam. SCALE 1" = 30' DATE 06/01/2017 SHEET 3 OF 3 TEXAS PE REG #F-493 TBPLS REG 1100341-00 JOB NO. 16907.10 E—FILE 1 16907.10PDE DWG NO. 26,596X EXHIBIT B Detention Pond Layout M.,ZI P M..ZI M.. a tlK N SANGU/NET ST. N (60'RICHT 311- lV ( IN 00 I � I 00 II60 Q 3LAJ Q O CS �co= U V Oc�i�cpp lJ RJ `O�' i �O lJ IIJ oil ^ OJ, cp Jml� `f OJ: C � �p �FOQ µco �hcV �iOQc �Q� hO� N II ��} ►� O� '=4�i�Qipc�o m W e O2�y � m��4p Q 00 z WtOp ipQ rz r4 l� = J gj m�J p � Q I � V C J J Q Wim= j � Q �p ill �lit r O Q �pkz � o WZO �o J \\Ulr Wp J O� O � " � p2 i EXHIBIT B Detention Calculations Maximum Detention Volume Calculations Based on the QReleased Per The Orifice Design Storage Volume Required Storage Volume Required Storage Volume Required iSWM 100yr Qallowable iSWM 5yr Qallowable iSWM Tyr Qallowable Qa= 5.07 cls Qa= 3.08 cfs Qa= 2.22 cls C= 0.83 C= 0.83 C= 0.83 A= 1.25 ac A= 1.25 ac A= 1.25 ac a= 322.07 for 100 yr a= 170.81 for 100 yr a= 95.835 for 100yr b= 24.39 for 100 yr b= 19.44 for 100 yr b= 13.43 for 100 yr Td= 32.33 min Td= 27.85 min Td= 21.22 min tc= 10 min tc= 10 min tc= 10 min P180= 5.43 in P180= 2.94 in P180= 1.77 in Ptd= 2.98 in Ptd= 1.64 in Ptd= 0.96 in lVprelim=l 4993.54 cu.ft Vprelim= 2764.53 ICU.ft Vprelim= 1570.48 1 cu.ft Vmax= 9088.42 cu.ft Vmax= 4945.87 cu.ft Vmax= 2885.45 Icu.ft Underground Dention System Capacity TxDOT Hydraulic Design Manual System Incremental Cumulative Standard orifice equation(9-8) Elevation Q=CA(2gH)A0.5 Depth Volume Volume (ft) (ft) (cu.ft) (cu.ft) 100yr Storm Event First Orifice(Bottom) 659.70 0.00 0.00 0.00 C= 0.67 659.90 0.20 370.32 370.32 Qa= 5.08 cfs 660.10 0.40 370.32 740.64 Orifice Dia= 8.30 in 660.30 0.60 370.32 1110.96 100-yr WSE= 4.91 ft 660.50 0.80 370.32 1481.28 H= 4.57 ft 660.70 1.00 370.32 1851.60 Q1= 4.32 cfs 660.90 1.20 370.32 2221.92 Second Orifice(Top) 661.10 1.40 370.32 2592.24 C= 0.67 661.30 1.60 370.32 2962.56 Qa= 0.76 cfs 661.50 1.80 370.32 3332.88 Orifice Width= 5.50 in 661.70 2.00 370.32 3703.20 Orifice Height= 2.50 in 661.90 2.20 370.32 4073.52 Orifice Area= 13.75 inA2 662.10 2.40 370.32 4443.84 H= 2.14 ft 662.30 2.60 370.32 4814.16 Q2= 0.75 cfs 662.50 2.80 370.32 5184.48 Q=Q1+Q2= 5.07 cfs 662.70 3.00 370.32 5554.80 Syr Storm Event 662.90 3.20 370.32 5925.12 First Orifice(Bottom) 663.10 3.40 370.32 6295.44 C= 0.67 663.30 3.60 370.32 6665.76 Qa= 3.17 cfs 663.50 3.80 370.32 7036.08 Orifice Dia= 8.30 in 663.70 4.00 370.32 7406.40 5-yr WSE= 2.67 ft 663.90 4.20 370.32 7776.72 H= 2.33 ft 664.10 4.40 370.32 8147.04 Q= 3.08 cfs 664.30 4.60 370.32 8517.36 1 rStormEvent 664.50 4.80 370.32 8887.68 First Orifice(Bottom) 664.70 5.00 370.32 9258.00 C= 0.67 100YR MSE=664.61' Qa= 2.23 cfs 100YR SYSTEM DEPTH-4.91' Orifice Dia= 8.30 in 5YR M3E662J7' 1-yr WSE= 1.56 ft 5YR SYSTEM DEPTH-2.67' H= 1.21 ft YR*3r-661.26' I \ YR SYSTEM DEPTH-1.56' Q= 2.22 cfs EXHIBIT B Detention Outfall Details 5" 100YR WSE 60" DIAMETER OUTLET UNDERGROUND ORIFICE DETEN77ON BARREL W=5.5"" H=2.5"" 5 Y WSE. ,36" RCP � TO MANHOLE `} 1 YR WSE , OUTLET �O ORIFICE io N D=8..3"" `O OUTFALL STRUCTURE DETAIL NOT 70 SCAL£ 10OYR WSE PROPOSED ORIFICE PLA 7F 5 Y WSE OUTLET ORIFICE H=2.5 ,36" RCP 1 YR WSE TO MANHOLE 'o �i h OUTLET ORIFICE D=8.J" OUTFALL 57RUC7URE DETAIL NOT 70 SCALE w C m M z a w(¢7¢= a m° Swarcp� go 0 Up�0U � a paow 01.8 0,z i A n 1. m ww10* O <. 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Q a .0 p zaQLLym iH $tea �mLL�wOx 3 O U� p O F �UaNWx a I ORZ O`- r 0 wy Z h� z ✓xiw OaU �°W Q s U �mw G of w U v Z68 az ry LLvi €¢ z Ffj O z () H H pZ�N J J W W f0 W Z O W 3W� O=< = Q Fm F F d LLl 0 a Uf O �i� p w Oa x$ z a > $oa o n gam (� z p¢N°aV<W]a OKz�a 02w6 o �arcm�m N¢ Ow HalN ' HVANwyZW'M s I x�1 �OaOi rM 6 y0 OV Uwa~ 11 0< ° Qa uVi r SOS O a j OZa wrc wF LL-O a 9iEsii Se p{ M0 I O Us�Z pF ¢ >O Nw pwU aEasf- at{8 ''== I Z ¢=�f w.= O OW ww OF I Lr U r O p $ o � ag°` ci m�pwoazi$$ � = w� Oo FsFfi r- woom e3;e::�pVra "Hill$i%agg RI zv Oo x x F Ff UF o {ai4 W, W n: g M NFa w a� UDNa x H �?� s �a al �'aa� a� ✓€i€ ss `s%£'% 2•�a.�e;, Fi Exhibit"C" CITY OF FORT WORTH STORMWATER FACILITY OPERATION AND MAINTENANCE PLAN The only responsibility the City of Fort Worth has in the operation and maintenance of this Facility is inspection. General Maintenance Procedures The structural and functional integrity of the Facility shall be maintained at all times by removing and preventing drainage interference, obstructions, blockages, or other adverse effects into, through, or out of the system. Periodic silt removal shall occur when standing water conditions occur or the pond's storage volume is reduced by more than 10%. Silt shall be removed and the pond/basin returned to original lines and grades shown on the approved engineering plans. In addition, corrective measures are required any time a basin does not drain completely within 72 hours of cessation of inflow. NO STANDING WATER IS ALLOWED in basins designed for dry detention purposes. Accumulated litter, sediment, and debris shall be removed quarterly or as necessary to maintain proper operation of the basin. Disposal shall be in accordance with federal, state and local regulations. Access to the UDS will be available through several access manholes. These manholes have ladders built into them to ease accessibility. 4. PREVENTIVE MAINTENANCE/INSPECTION • Visual inspections of all components will be conducted every 6 months. • A log shall be kept of maintenance actions, and inspections. The log should document the condition of the detention system's primary components, mowing, and silt, litter and debris removal dates. Document aeration of the basin bottoms and replanting to prevent the sealing of the basin bottom. • Written maintenance and repair records shall be maintained by the party or parties signing the attached Agreement and shall be provided to the City upon request. STORMWATER FACILITY MAINTENANCE AGREEMENT Rev.11/17/2016 STORM WATER FACILITY MAINTENANCE AGREEMENT EXHIBIT C-1 C=.: NTECH® ENGINEERED SOLUTIONS Contech° CMP Detention & Infiltration Maintenance Guide 1 , t CMP DETENTION SYSTEMS STORM WATER FACILITY MAINTENANCE AGREEMENT EXHIBIT C-1 Contech®CMP Detention Underground stormwater detention/infiltration and retention systems must be properly inspected and maintained at regular intervals for purposes of performance and longevity. Inspection Inspection is the key to effective maintenance and is easily performed.Contech recommends ongoing quarterly inspections. The rate at which the system collects pollutants will depend more heavily on site specific activities rather than the size or configuration of the system. Inspections should be performed more often in equipment washdown areas, in climates where sanding and/or salting operations take place,and in various other instances in which higher accumulations of sediment or abrasive/corrosive conditions may exist. Inspection and maintenance records should be maintained for the life of the system. Maintenance Systems should be cleaned when inspection reveals that accumulated sediment or trash is clogging the discharge orifice. Accumulated sediment and trash can typically be evacuated through the manhole over the outlet orifice. If maintenance is not performed as recommended,sediment and trash may accumulate in front of the outlet orifice. Manhole covers should be securely seated following cleaning activities. Contech suggests that all systems be designed with an access/inspection manhole situated at or near the inlet and the outlet orifice. Should it be necessary to get inside the system to perform maintenance activities,all appropriate precautions regarding confined space entry and OSHA regulations should be followed. If inspectors observe any salt or other corrosive substance concentrations or accumulations in the system,or if salt or other corrosive substance is used or prevalent near the system, it is recommended to rinse the system above the spring line annually between late spring and early summer as part of the maintenance program.This maintenance is required for infiltration systems. Excessive salting should be avoided and pavement should be sealed to reduce salt infiltration from the surface. Maintaining an underground detention or retention system is easiest when there is no flow entering the system. For this reason, it is a good idea to schedule the cleanout during dry weather. The foregoing inspection and maintenance efforts help ensure underground pipe systems used for stormwater storage continue to function as intended by identifying recommended regular inspection and maintenance practices. Inspection and maintenance related to the structural integrity of the pipe or the soundness of pipe joint connections is beyond the scope of this guide. 2 Exhibit "D" Stormwater Structural Maintenance CHECKLIST FREQUENT REPAIRS REPAIRS INSPECTION ATE REQUIRED MADE NOTES Remove Trash and debris Violations Noted MINOR INSPECTION Condition of Pond Amount of silt in and Amount of silt in flume Amount of ponded water MAJOR INSPECTIONS Evidence of Aquatic life STORMWATER FACILITY MAINTENANCE AGREEMENT (J Rev.11/1712016