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Home My WebLink About20120309001481 STORM WATER EASEMENT AND MAINT AGREEMENT 10/28/2011MSc' AMEWCAN Return Address: City of Auburn City Clerk 25 West Main Auburn, WA 98001 2012039 FIRST AMERICAN EAS Above this line reserved for recording information. uasi 145 00 STORM WATER EASEMENT AND MAINTENANCE AGREEMENT FAC05 -0007 & FAC10 -0011 Reference # (if applicable): N/A Grantors /Borrowers: B &J Auburn, LLC Grantors /Borrowers S &B HospitalitY, LLC Grantee /Assignee/Beneficiary- City of Auburn Legal Description /STR. SW '/< SW '/, S18 — T21N — R5E Assessor's Tax Parcel ID# 182105 -9184 K 182105 -9253 6O THIS EASEMENT AND AGREEMENT made and entered into this OV day of 0Q —kVEP, , 2011, by and between the City of Auburn, a municipal corporation of King County, Washington, hereinafter referred to as "CITY" and both B &J Auburn, LLC and S &B Hospitality, LLC, hereinafter referred to as "PROPERTY OWNERS" WHEREAS, PROPERTY OWNERS have applied for certain permits with the CITY for the construction of I'acihties for the ,lack -In- The -Box / Convenience Store / Fuel Station located at 524 A Street SE and La Quinta Inn located at 225 6`h Street SE respectively, which create impervious surface; and WHEREAS, the PROPERTY OWNERS will complete a storm system, and WHEREAS, the PROPERTY OWNERS and the CITY desire that the storm system be maintained to provide adequate facilities for controlling both the quantity and quality of storm drainage; and WHEREAS, for maintenance of a storm system it is necessary to have appropriate right -of -way to bring in equipment to conduct maintenance functions; and Storm Water Easement and Maintenance Agreement I'aD LIPIP11IFYMR aBLF-DyrfA£1DIOR Page I of 22 ' " °.4•�•,,Q6` "''t'�' ±@!:'E:RTt':A?'i WHEREAS, maintenance requirement is a covenant running with the land and binding upon all heirs, successors and assigns of all parties; and WHEREAS, the parties desire that this Agreement be recorded to advise heirs, successors and assigns of both parties as to the existence of this easement and agreement; and WHEREAS, an easement is needed to bring in maintenance equipment; and WHEREAS, the parties are both desirous of permitting inspection of the storm system to make certain that it is functioning properly and for purposes of determining the appropriate repairs. NOW, THEREFORE, BASED UPON MUTUAL COVENANTS TO BE DERIVED THE PARTIES AGREE AS FOLLOWS. Section 1, EASEMENT PROPERTY OWNERS hereby provide a non - exclusive easement to the City for access, inspection, and maintenance for the purposes of this Agreement and the attached Storm Water Pollution Prevention Plan, over, under and on that real estate described in Exhibit "A" & "B" and on that portion of the properties as showing on the approved Record Drawings revised pursuant to construction records for the City of Auburn under Permits Nos. FAC05 -0007 and FAC10 -0011, which record drawings are hereby incorporated by reference as if set out in full. This easement shall be a burden to that real estate which is legally described and attached as Exhibit "A" & "B" and incorporated herein by this reference, and shall be a benefit to the City Storm Drainage Utility System. parties. Section 2, HEIRS, SUCCESSORS AND ASSIGNS This Agreement shall be binding upon the heirs, successors and assigns of the Section 3, MAINTENANCE The PROPERTY OWNERS agree to maintain the storm system in accordance with the ordinances and all applicable codes of the CITY and the Stonn Water Pollution Prevention Maintenance and Operation Schedule attached as Exhibit "C" and incorporated herein by this reference. The PROPERTY OWNERS do hereby agree that the CITY may enter onto the properties of the PROPERTY OWNERS via the easement described above Storm Water Easement and Maintenance Agreement Page 2 of 22 to inspect and perfonn necessary maintenance if, after the PROPERTY OWNERS are given notice to maintain, the PROPERTY OWNERS fail to maintain. Further, the PROPERTY OWNERS agree the CITY may enter onto the properties of PROPERTY OWNERS via the easement described above to perform emergency maintenance in the event of the storm system's failure which might result in adverse impacts on public facilities or private facilities of other property owners. In both events the PROPERTY OWNERS agree to reimburse the CITY for the costs incurred by the CITY in maintaining the storm system. Should the CITY incur attorney's fees and /or costs in enforcing the agreement and /or in maintaining or collecting maintenance fees, the PROPERTY OWNERS agree to pay reasonable attorney's fees and all costs incurred by the CITY Section 4, ACKNOWLEDGMENT OF OTHER ENFORCEMENT ACTIONS PROPERTY OWNERS acknowledge that there may be liability for violations of codes that could result in additional fines and /or the possibility of incarceration in addition to the fees for maintenance should violations occur _ O - - C � It � - Storm Water Easement and Maintenance Agreement Page 3 of 22 EXECUTED as of the date first written above. La Quinta Inn 225 6th ST SE — Parcel # 182105 -9253 —,-r it ---- /0//f L'11 Authorized Signature Date A 424 Authorized Signature Date /0////// STATE OF WASHINGTON) ) ss COUNTY OF KING ) I certify I have know or have satisfactory evidence that f( u P t AtbE2 1' S a,P A_ and ( aSo h 41 are the persons who! appeared before me, and said persons acknowledged that they signed this instrument on oath stated that they were authorized to execute the instrument and acknowledge as the mANAgF_P-- & MF— ,ff110 EP_ of S & B Hospitality, LLC, a limited liability company, to be the free and voluntary act of such party for the uses and purposes mentioned in the instrument. Dated /0 /11/fl f 7, >a Notary Public in and for the State of Residing at— PLQ_n, CjokAt4 ,z�- My appointment expires tf t fill, Storm Water Easement and Maintenance Agreement Page 4 of 22 EXECUTED as of the date first written above. Jack —In -Tile -Box / Convenience Store / Fuel Station 524 `A' ST SP — Parcel # 182105 -9184 Authorized Signature Date Authorized Signature Date STATE OF WASHINGTON) ) ss COUNTY OF KING ) I certify I have know or have satisfactory evid nce that &V,\ ye- V-\ and gate the person(s) who appeared before me, l0d said person(s) acknowledged that they signed this instrument on oath stated that i /she /they was /were authorized to execute the instrument and acknowledge as the yi Ji" of B & J Aiubt n, LLC, a limited liability company, to be the free and voluntary act of such party for the uses and purposes mentioned in the instrument. Dated tD l Z-1 Ill KIMBERLY ANNE BJORKLUND STATE OF WASHINGTON NOTARY PUBLIC MY COMMISSION EXPIRES 03 -25 -15 It-Iyv\h P� 1, Notary Public in land fo the Stat Residing at My appointment expires Storm Water Easement and Maintenance Agreement Page 5 of 22 CITY OF AUBURN 1 O /mil ( tm C� arlaw, Storm Drainage Engineer Date STATE OF WASHINGTON) )ss. COUNTY OF KING ) I certify that I know or have satisfactory evidence that Tim Carlaw is the person who appeared before me, and said person acknowledged that he signed this instrument, on oath stated that he was authorized to execute the instrument and acknowledged it as the STORM DRAINAGE ENGINEER of THE CITY OF AUBURN to be the free and voluntary act of such party for the uses and purposes mentioned in this instrument. Dated �l q [ IS /t1b Pile: #1305 Stoma Water Easement and Maintenance Agreement Page 6 of 22 and for BtApttt4�� _ �a \q \N \\\11111111 I Notary Public in Residing at My appointment ��111 OF WASNv`.�. [ IS /t1b Pile: #1305 Stoma Water Easement and Maintenance Agreement Page 6 of 22 and for EXHIBIT `A' Parcel 182105 -9184: PROPOSED PARCEL `A' LEGAL DESCRIPTION PER AUBURN LOT LINE ADJUSTMENT NO LLA05 -0004, AS RECORDED UNDER RECORDING NUMBER 20050321002151 RECORDS OF KING COUNTY, WASHINGTON SITUATE IN THE CITY OF AUBURN, COUNTY OF KING, STATE OF WASHINGTON Parcel 182105 -9253: PROPOSED PARCEL 'B' LEGAL DESCRIPTION PER AUBURN LOT LINE ADJUSTMENT NO LLA05 -0004, AS RECORDED UNDER RECORDING NUMBER 20050321002151, RECORDS OF KING COUNTY, WASHINGTON SITUATE IN THE CITY OF AUBURN, COUNTY OF KING, STATE OF WASHINGTON Storm Water Easement and Maintenance Agreement Page 7 of 22 EXHIBIT `B' psi rpplFT(_h /' +1-C1v /'I(,i ss C I 2 3 4 I 5 6 7 8 I 9 ]CI il \ I `R =SO' FIRE- - ac ss ® m —< o • — — — — STU Rm M{1NNUt ^a,o i R =25' E AC SS — — — — — — la 19 zo I zt zz, 23 za STUP�" I r ® sl N I I ------------ 20Io1. _1/OR'rECH fN \� I I LA QUINTA INN K\ VA4L -Sr_ I 7AI III � I I lV2.io�-- r NF -JI 1 fezos, --(l6 %• i� ' - ----- ---- - --- 32 I� STURrh - -I I — F_ '. BA51N I Y '0I 3 39 8 II�I �47� 40 41 42 43' 44 45 461_ g \ ®I 55 56 57 58 59 60 161 1 62 63 164 6: C C I C C C C C C I C C C Storm Water Easement and Maintenance Agreement Page 8 of 22 EXHIBIT `C' STORM WATER POLLUTION PREVENTION MAINTENANCE and OPERATION SCHEDULE for La Quinta Inn SEPA NO. SEP10 -0027 FAC NO. FAC10 -0011 GRA NO GRA10 -0014 and Jack -In- The -Box / Convenience Store / Fuel Station SEPA NO. SEP04 -0030 FAC NO FAC05 -0007 GRA NO GRA04 -0026 Site Address: Both projects are located in SW '/4, SW '/4, Section 18, Township 21 North, Range 5 East, W M. The La Quinta Inn project is located at 225 6th Street SE, Auburn, WA 98002, and the tax parcel number is 182105 -9253. The Jack -In- The -Box / Convenience Store / Fuel Station project is located at 524 'A' Street SE, WA 98002, and the tax parcel number is 182105 -9184 Introduction: This storm drainage technical information report has been prepared to address the City of Auburn's site development and storm drainage requirements for the proposed La Quinta Inn located at 225 6'h Street SE and already constructed Jack -In -The Box / Convenience Store / Fuel Station located at 524 'A' Street SE. The site has a combined total area of approximately 2.28 acres, and is mostly built up although the La Quinta Inn site (approximately 0 85 acres) is mostly vacant, other than a detention pond at the NW corner of that parcel. Stonn Water Easement and Maintenance Agreement Page 9 of 22 The subject site for the Jack -In- The -Box / Convenience Store / Fuel Station was developed for the retail use it currentlYt serves, along with improving the street frontage for the property along 6 h Street SE to City standards, and providing for the overall storm treatment for both parcels when fully developed The subject site for the La Quinta Inn will be developed for hotel use, in line with the heavy commercial zoning The existing detention pond will be reshaped at the access ramp to provide access around the back side of the building, the sidewalk fronting 6th Street SE will be improved to City standards, and the east access will be replaced with two new access points from neighbor parcel to the east. According to the City of Auburn's Construction Standards for storm water management, the city requires storm water quantity and quality control to all proposed developments We have proposed to collect all of the storm water runoff from the landscaped, building and pavement areas in a series of catch basins. This water will be conveyed by storm drainage pipe to a storm water detention pond located within the Northwest portion of the La Quinta Inn parcel. A control structure restricts the discharge rate to meet the detention design criteria of the City of Auburn — detain the volume created from releasing half the existing 2 -year, 10, 25, and 100 -year storm events, while holding the developed 2 -year, 10, 25, and 100 -year storm volumes. A Vortechs® treatment vault is installed after the south outlet from the pond, on the Jack -In- The -Box / Convenience Store / Fuel Station parcel, to treat all site runoff prior to discharge to the City storm trunk -line within 6th Street SE. In the event of failure to overcapacity of the treatment facility, a gravity overflow will occur at the northwest driveway onto "A" Street SE. Plan Goal: The specific purpose for the storm water facility is to minimize pollution that is typically associated with modern development. In general, pollution from motor vehicles and pollution generated from erosion. Attached to this narrative is a maintenance manual, which offers guidelines to the owner for storm water facility maintenance. Storm Water Easement and Maintenance Agreement Page 10 of 22 Prevention BMP'S: The catch basins shall have stenciled on them "DUMP NO WASTE — DRAINS TO STREAM." The owner shall be responsible for sweeping the lot, installing storm drainage stenciling and provide spill control procedures In case of spill call DOE at 1- 425 - 649 -7000 The catch basins, detention /wetpond, and control structures will be visually inspected for accumulation of debris and silt and will be maintained as required by this pollution prevention plan and attachments. Maintenance Standards for Drainage Facilities (from the Department of Ecology Storm Water Manual, February 2005) No 1 — Detention Pond No 4 — Control Structure /Flow Restrictor No 5 —Catch Basins Vortechs Treatment Vault Treatment BMP'S: A Vortechs® treatment vault has been installed to treat runoff for conventional pollutants. The treatment vault was designed to the post - detention discharge for the 2 -year storm event (water quality storm) for water quality treatment. Since the treatment vault capacity far exceeds this design treatment rate, the system will be designed to treat 1 4 cfs (max. allowable vault design treatment = 1 6 cfs) Inspection /Maintenance. Regular inspections of the drainage facilities should be carried out twice per year, in the spring and fall. The responsible party should keep records of these inspections available for review by the City Additional inspections may be required after severe storms. Routine maintenance of the site will include mowing, care of landscaping and the removal of trash and debris from the drainage system The parking lots and driveways should be kept clean and in repair. Events such as major storms or heavy winds will require immediate inspections for damages Storm Water Easement and Maintenance Agreement Page I I of 22 To ensure proper water quality and treatment, the detention pond and Vortechs® system must be properly maintained. Be careful to avoid introducing landscape fertilizer to receiving waters or groundwater Catch basins shall be cleaned when sump is 1/3' full of sediment or debris. Person of Responsibility: La Quinta Inn: S &B Hospitality, LLC Satpal Sohal 9322 South 216th Place Kent, WA 98031 (206) 229 -5246 Design Engineer: La Quinta Inn. W B Wells & Associates, Inc. Mark A. Zeman, PE 4230 NE Fremont Street Portland, OR 97213 (503) 284 -5896 Plan and /or Information Updates: Jack -In- The -Box: B &J Auburn, LLC Su Yong Yen 5892 169th Avenue SE Bellevue, WA 98006 sam @yenintl.com Jack -In- The -Box: Terraforma Design Group, Inc. Pedro DeGuzman 521237 th Avenue SW Seattle, WA 98126 (206) 923 -0590 The City of Auburn Storm Drainage Utility section is to review and approve any changes to this Storm Water Pollution Prevention Plan prior to changes in its implementation. Additionally, any changes in ownership or person of responsibility are to be reported to the City Storm Drainage Utility section (Changes to ownership shall be reported to the City of Auburn's Utilities Section) Storm Water Easement and Maintenance Agreement Page 12 of 22 INSPECTION / MAINTENANCE CHECKLIST STRUCTURE i DATE OF INSPECTION /MAINTENANCE I I Results/ Maintenance Date Inspection All Catch Basins Results Maintenance Done Storm Detention Inspection Pond Results Maintenance Done Inspection Conveyance Pipes Results Maintenance Done Flow Control Inspection Structure Results Maintenance Done Vortechs Inspection Treatment Vault Results Maintenance Done Maintenance Standards for Drainage Facilities: The facility- specific maintenance standards contained in this section are intended to be conditions for determining if maintenance actions are required as identified through inspection They are not intended to be measures of the facility's required condition at all times between inspections. In other words, exceeding these conditions at any time between inspections and /or maintenance does not automatically constitute a violation of these standards. Storm Water Easement and Maintenance Agreement Page 13 of 22 However, based upon inspection observations, the inspection and maintenance schedules shall be adjusted to minimize the length of time that a facility is in a condition that requires a maintenance action. No.1 — Detention Ponds Maintenance Defect Conditions When Maintenance Is Results Expected When Component Needed Maintenance Is Performed General Trash & Debris Any trash and debris which exceed 5 Trash and debris cleared from cubic feet per 1,000 square feet (this site. is about equal to the amount of trash it would take to fill up one standard size garbage can). In general, there should be no visual evidence of dumping. If less than threshold all trash and debris will be removed as part of next scheduled maintenance. Poisonous Any poisonous or nuisance vegetation No danger of poisonous Vegetation and which may constitute a hazard to vegetation where maintenance noxious weeds maintenance personnel or the public. personnel or the public might normally be. (Coordinate with Any evidence of noxious weeds as local health department ) defined by State or local regulations Complete eradication of (Apply requirements of adopted IPM noxious weeds may not be policies for the use of herbicides). possible. Compliance with State or local eradication policies required. Contaminants Any evidence of oil, gasoline, No contaminants or pollutants and Pollution contaminants or other pollutants. present (Coordinate removal /cleanup with local water quality response agency). Rodent Holes Any evidence of rodent holes if facility Rodents destroyed and dam or is acting as a dam or berm, or any berm repaired (Coordinate evidence of water piping through dam with local health department, or berm via rodent holes. coordinate with Ecology Dam Safety Office if pond exceeds 10 acre - feet.) Stone Water Easement and Maintenance Agreement Page 14 of 22 No. 1 - Detention Ponds Maintenance Defect Conditions When Maintenance Is Results Expected When Component Needed Maintenance Is Performed Beaver Dams Dam results in change or function of Facility is returned to design the facility function (Coordinate trapping of beavers and removal of dams with appropriate permitting agencies.) Insects When insects such as wasps and Insects destroyed or removed, hornets interfere with maintenance from site. activities Apply insecticides in compliance with adopted IPM policies. Tree Growth Tree growth does not allow Trees do not hinder and Hazard maintenance access or interferes with maintenance activities. Trees maintenance activity (i e , slope Harvested trees should be mowing, silt removal, vactoring, or recycled into mulch or other equipment movements). If trees are beneficial uses (e g., alders for not interfering with access or firewood) maintenance, do not remove. Remove hazard trees. If dead, diseased, or dying trees are i identified. (Use a certified Arborist to determine health of tree or removal requirements.) Side Slopes Erosion Eroded damage over 2 inches deep Slopes should be stabilized of Pond where cause of damage is still present using appropriate erosion or where there is potential for control measure(s); e g , rock continued erosion. reinforcement, planting of grass, compaction. Any erosion observed on a compacted berm embankment. If erosion is occurring on compacted berms a licensed civil engineer should be consulted to resolve source of erosion. Storage Area Sediment Accumulated sediment that exceeds Sediment cleaned out to 10% of the designed pond depth designed pond shape and unless otherwise specified or affects depth, pond reseeded if inletting or outletting condition of the necessary to control erosion facility Liner (If Liner is visible and has more than Liner repaired or replaced. Applicable) three 1/4 -inch holes in it. Liner is fully covered. Storm Water Easement and Maintenance Agreement Page 15 of 22 No.1 - Detention Ponds Maintenance Defect Conditions When Maintenance Is Results Expected When Component Needed Maintenance Is Performed Pond Berms Settlements Any part of berm that has settled 4 Dike is built back to the design (Dikes) inches lower than the design elevation elevation. If settlement is apparent, measure berm to determine amount of settlement. Settling can be an indication of more severe problems with the berm or outlet works. A licensed civil engineer should be consulted to determine the source of the settlement. Piping Discernable water flow through pond Piping eliminated. Erosion berm. Ongoing erosion with potential potential resolved. for erosion to continue (Recommend a Goethechnical engineer be called in to inspect and evaluate condition and recommend repair of condition Emergency Tree Growth Tree growth on emergency spillways Trees should be removed. If Overflow/ creates blockage problems and may root system is small (base less Spillway and cause failure of the berm due to than 4 inches) the root system Berms over 4 uncontrolled overtopping, may be left in place Otherwise feet in height. the roots should be removed Tree growth on berms over 4 feet in and the berm restored A height may lead to piping through the licensed civil engineer should berm which could lead to failure of the be consulted for proper berm berm /spillway restoration. Piping Discernable water flow through pond Piping eliminated Erosion berm Ongoing erosion with potential potential resolved. for erosion to continue (Recommend a Goethechnical engineer be called in to inspect and evaluate condition and recommend repair of condition. Emergency Emergency Only one layer of rock exists above Rocks and pad depth are Overflow/ Overflow/ native soil in area five square feet or restored to design standards. Spillway Spillway larger, or any exposure of native soil at the top of out flow path of spillway (Riprap on inside slopes need not be replaced.) Erosion See "Side Slopes of Pond " Storin Water Easement and Maintenance Agreement Page 16 of 22 No. 4 - Control StructurelFlow Restrictor Maintenance Defect Condition When Maintenance is Results Expected Component Needed When Maintenance is Performed I General Trash and Debris Material exceeds 25% of sump depth or 1 Control structure orifice (Includes foot below orifice plate. is not blocked. All trash Sediment) and debris removed. Structural Damage Structure is not securely attached to Structure securely manhole wall. attached to wall and outlet pipe Structure is not in upright position (allow Structure in correct up to 10% from plumb) position. Connections to outlet pipe are not Connections to outlet watertight and show signs of rust. pipe are watertight; structure repaired or replaced and works as designed Any holes, other than designed hales, in Structure has no holes the structure other than designed holes. Cleanout Damaged or Cleanout gate is not watertight or is Gate is watertight and Gate Missing missing works as designed One maintenance person cannot move up Gate moves up and and down gate. down easily and is watertight. Chain /rod leading to gate is missing or Chain is in place and damaged. works as designed. Gate is rusted over 50% of its surface Gate is repaired or area. replaced to meet design standards Orifice Plate Damaged or Control device is not working properly due Plate is in place and Missing to missing, out of place, or bent orifice works as designed plate. Obstructions Any trash, debris, sediment, or vegetation Plate is free of all blocking the plate. obstructions and works as designed. Overflow Pipe Obstructions Any trash or debris blocking (or having Pipe is free of all the potential of blocking) the overflow obstructions and works pipe as designed. Manhole See 'Closed See "Closed Detention Systems' (No 3) See "Closed Detention Detention Systems' Systems' (No 3) (No. 3). Catch Basin See "Catch Basins' See Catch Basins" (No. 5) See "Catch Basins' (No. (No. 5). 1 5). Storm Water Easement and Maintenance Agreement Page 17 of 22 No. 5 — Catch Basins Maintenance Defect Conditions When Maintenance is Needed Results Expected Component When Maintenance is performed General Trash & Debris Trash or debris which is located immediately No Trash or debris in front of the catch basin opening or is located immediately in blocking inletting capacity of the basin by front of catch basin or on more than 10% grate opening Trash or debris (in the basin) that exceeds 60 No trash or debris in the percent of the sump depth as measured from catch basin. the bottom of basin to invert of the lowest pipe into or out of the basin, but in no case less than a minimum of six inches clearance from the debris surface to the invert of the lowest pipe. Trash or debris in any inlet or outlet pipe Inlet and outlet pipes blocking more than 1/3 of its height free of trash or debris. Dead animals or vegetation that could No dead animals or generate odors that could cause complaints or vegetation present within dangerous gases (e.g., methane). the catch basin. Sediment Sediment (in the basin) that exceeds 60 No sediment in the catch percent of the sump depth as measured from basin. the bottom of basin to invert of the lowest pipe into or out of the basin, but in no case less than a minimum of 6 inches clearance from the sediment surface to the invert of the lowest pipe. Structure Top slab has holes larger than 2 square Top slab is free of holes Damage to inches or cracks wider than 1/4 inch. and cracks. Frame and /or Top Slab (Intent is to make sure no material is running into basin) Frame not sitting flush on top slab, i.e., Frame is sitting flush on separations of more than 3/4 inch of the frame the riser rings or top slab from the top slab. Frame not securely and firmly attached. attached Fractures or Maintenance person judges that structure is Basin replaced or Cracks in unsound, repaired to design Basin Walls/ standards Bottom Grout fillet has separated or cracked wider Pipe is regrouted and than 1/2 inch and longer than 1 foot at the joint secure at basin wall. of any inlet/outlet pipe or any evidence of soil particles entering catch basin through cracks Settlement/ If failure of basin has created a safety, Basin replaced or Misalignment function, or design problem. repaired to design standards. Vegetation Vegetation growing across and blocking more No vegetation blocking than 10% of the basin opening opening to basin Storm Water Easement and Maintenance Agreement Page 18 of 22 No. 5 —Catch Basins Maintenance Defect Conditions When Maintenance is Needed Results Expected Component When Maintenance is performed Vegetation growing in mletloutlet pipe joints No vegetation or root that is more than six inches tall and less than growth present six inches apart. Contamination See "Detention Ponds" (No. 1). No pollution present. and Pollution Catch Basin Cover Not in Cover is missing or only partially in place Any Catch basin cover is Cover Place open catch basin requires maintenance. closed. Locking Mechanism cannot be opened by one Mechanism opens with Mechanism maintenance person with proper tools. Bolts proper tools. Not Working into frame have less than 1/2 inch of thread Cover Difficult One maintenance person cannot remove lid One maintenance person to Remove after applying normal lifting pressure. can remove cover (Intent is keep cover from sealing off access to maintenance.) Ladder Ladder Rungs Ladder is unsafe due to missing rungs, not Ladder meets design Unsafe securely attached to basin wall, misalignment, standards and allows rust, cracks, or sharp edges. maintenance person safe access. Metal Grates Grate opening Grate with opening wider than 7/8 inch. Grate opening meets (If Applicable) Unsafe design standards Trash and Trash and debris that is blocking more than Grate free of trash and Debris 20% of grate surface inletting capacity debris. Damaged or Grate missing or broken member(s) of the Grate is in place and Missing. grate meets design standards Storm Water Easement and Maintenance Agreement Page 19 of 22 Vortechs® Treatment Vault Maintenance Defect Condition When Maintenance is Results Expected When Component Needed Maintenance is Performed Below Sediment Sediment depth exceeds 12- inches in first No sediment deposits in vault Ground Vault Accumulation chamber Should be inspected every 3 bottom of first chamber in Vault months. Trash /Debris Trash and debris accumulated on Trash and debris removed Accumulation compost filter bed. from the compost filter bed. Access Cover Cover cannot be opened; one person Cover repaired to proper Damaged /Not cannot open the cover using normal lifting working specifications or Working pressure, corrosion /deformation of cover replaced. Vault Structure Cracks wider than 1/2 -inch or evidence of Vault replaced or repairs Includes soil particles entering the structure made so that vault meets Cracks in Wall, through the cracks, or design specifications and is Bottom, maintenance/inspection personnel structurally sound Damage to determine that the vault is not structurally Frame and /or sound Top Slab Cracks wider than 1/2 -inch at the joint of Vault repaired so that no any inletloutlet pipe or evidence of soil cracks exist wider than 1/4- particles entering through the cracks. inch at the joint of the inlet/outlet pipe. Baffles / Weirs Baffles / weirs corroding, cracking Baffles repaired or replaced warping, and /or showing signs of failure to specifications as determined by maintenance / inspection person. For further reference, Vortechs(D System Maintenance manual is online at http.//www.contech- cpi. com/ Desktoi)Modules /Bring2mind /DMX /Download.aspx ?Command =Core Do wnload &Entryld = 2938 &Portalld= 0 &Tabld =144, including the following information. The Vortechs® system should be inspected at regular intervals and maintained when necessary to ensure optimum performance. The rate at which the system collects pollutants will depend more heavily on site activities than the size of the unit, e.g., unstable soils or heavy winter sanding will cause the swirl chamber to fill more quickly but regular sweeping will slow accumulation. Inspection Inspection is the key to effective maintenance and is easily performed Pollutant deposition and transport may vary from year to year and regular inspections will help ensure that the system is cleaned out at the appropriate time Inspections should be performed twice per year (i.e spring and fall) however more frequent inspections may be necessary in equipment wash down areas and in climates where winter sanding operations may lead to rapid accumulations. It is useful and often required as part of a permit to keep a record of each inspection Storm Water Easement and Maintenance Agreement Page 20 of 22 A simple inspection and maintenance log form for doing so is available on contechstormwater com. The Vortechs system should be cleaned when inspection reveals that the sediment depth has accumulated to within 12 to 18 inches of the dry- weather water surface elevation. This determination can be made by taking two measurements with a stadia rod or similar measuring device, one measurement from the manhole opening to the top of the sediment pile and the other from the manhole opening to the water surface Note To avoid underestimating the volume of sediment in the chamber, the measuring device must be carefully lowered to the top of the sediment pile Finer, silty particles at the top of the pile typically offer less resistance to the end of the rod than larger particles toward the bottom of the pile Cleaning Cleaning of the Vortechs° system should be done during dry weather conditions when no flow is entering the system Clean -out of the Vortechs° system with a vacuum truck is generally the most effective and convenient method of excavating pollutants from the system If such a truck is not available, a "clamshell' grab may be used, but it is difficult to remove all accumulated pollutants using a "clamshell In installations where the risk of petroleum spills is small, liquid contaminants may not accumulate as quickly as sediment. However, an oil or gasoline spill should be cleaned out immediately Motor oil and other hydrocarbons that accumulate on a more routine basis should be removed when an appreciable layer has been captured. To remove these pollutants, it may be preferable to use absorbent pads to solidify the oil since these pads are usually much easier to remove from the unit individually and less expensive to dispose of than the oil /water emulsion that may, be created by vacuuming the oily layer Floating trash can be netted out if you wish to separate it from the other pollutants. Cleaning of a Vortechs system is typically done by inserting a vacuum hose into the swirl chamber and evacuating this chamber of water and pollutants As water is evacuated, the water level outside of the swirl chamber will drop to a level roughly equal to the crest of the lower aperture of the swirl chamber The water outside the swirl chamber should remain near this level throughout pumping as the bottom and sides of the swirl chamber are sealed to the tank floor and walls. This "water lock" feature prevents water from migrating into the swirl chamber, exposing the bottom of the baffle wall and crating excess pump -out volume. Floating pollutants will decant into the swirl chamber as the water level is drawn down. This allows most floating material to be withdrawn from the same access point above the swirl chamber Storm Water Easement and Maintenance Agreement Page 21 of 22 Floating material that does not decant into the swirl chamber during draw down should be skimmed from the baffle chamber If maintenance is not performed as recommended, sediment may accumulate outside the swirl chamber If this is the case, it may be necessary to pump out other chambers. It is advisable to check for sediment accumulation in all chambers during inspection and maintenance These maintenance recommendations apply to all Vortechs systems with the following exceptions 1 It is strongly recommended that when cleaning systems larger than the Model 16000 the fable chamber be drawn down to depth of three feet prior to beginning clean -out of the swirl chamber Drawing down this chamber prior to the swirl chamber reduces adverse structural forces pushing upstream on the swirl chamber once that chamber is empty 2. Entry into a Vortechs® system is generally not required as cleaning can be done from the ground surface However, if manned entry into a system is required the entire system should be evacuated of water prior to entry regardless of the system size Manhole covers should be securely seated following cleaning activities to prevent leakage of runoff into the system from above and also to ensure proper safety precautions. If anyone physically enters the unit, Confined Space Entry procedures need to be followed. Disposal of all material removed from the Vortechs® system should be done in accordance with local regulations. In many locations, disposal of evacuated sediments may be handled in the same manner as disposal of sediments removed from catch basins or deep sump manholes Check your local regulations for specific requirements on disposal. For assistance with maintaining your Vortechs system, contact us regarding the CONTECH Maintenance Compliance Certification Program Storm Water Easement and Maintenance Agreement Page 22 of 22