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Home My WebLink About20060929003843 STORM EASEMENT 092906)4W I I q .2-1 1 0 4..~- 162, Return Address: City of Auburn City Clerk 25 West Main Auburn, WA 98001 D 10 TIT 54 . ae 023 Above this line reserved for recording inforniation. STORM WATER EASEMENT AND MAINTENANCE AGREEMENT Nom'-w5a%3- V9--- GRA05-0031 8 Reference # (if applicable): N/A Grantor/Borrower: Joseph and Susan Simmons Grantee/Assignee/Beneficiary: City of Auburn Legal Description/STR: NW %4 S19 T2 IN R5E WM Assessor's "Tax Parcel ID#: 314160-0445. 0455 THIS EASEMENT AND AGREEMENT made and entered into this T day of -emboe_ , 2006, by and between the City of Auburn, a municipal corporation S4P4 of King County, Washington, hereinafter referred to as "CITY" and Joseph and Susan Simmons hereinafter referred to as "PROPERTY OWNER". WHEREAS, PROPERTY OWNER has applied for certain permits with the CITY for the construction of facilities for Site Improvements for All Tune & Lube located at 1120 A ST SE, which create impervious surface; and WHEREAS, the PROPERTY OWNER will complete a storm system; and WHEREAS, the PROPERTY OWNER 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 WHEREAS, maintenance requirement is a covenant running with the land and binding upon all heirs, successors and assigns of both 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 a9d r0114W1w i~aelt~r~ V Ned for Storm Water Easement and Maintenance Agreement Page l of 23 EXCISE TAX NOT REWIRED 6rti, ~ rtRg D 'is+tt'~ r. 40commaation o*. It hft nor t- u *1ir1g g*90tftr! "0 as to its W.UW Me. I-,- 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 OWNER hereby provides 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" and on that portion of the property as showing on the approved Record Drawings revised pursuant to construction records for the City of Auburn under Permit No. GRA05-0031, 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" and incorporated herein by this reference, and shall be a benefit to the City Storm Drainage Utility System. Section 2, HEIRS, SUCCESSORS AND ASSIGNS This Agreement shall be binding upon the heirs, successors and assigns of the parties. Section 3, MAINTENANCE The PROPERTY OWNER agrees to maintain the storm system in accordance with the ordinances and all applicable codes of the CITY and the Storm Water Pollution Prevention Maintenance and Operation Schedule attached as Exhibit "B" and incorporated herein by this reference. The PROPERTY OWNER does hereby agree that the CITY may enter onto the property of the PROPERTY OWNER via the easement described above to inspect and perform necessary maintenance if, after the PROPERTY OWNER is given notice to maintain, the PROPERTY OWNER fails to maintain. Further, the PROPERTY OWNER agrees the CITY may enter onto the property of PROPERTY OWNER via the easement described above to perform emergency maintenance in the event of the storm system's failure which might result in adverse impacts(s) on public facilities or private facilities of other property owners. In both events the PROPERTY OWNER agrees to reimburse the CITY for the costs incurred by the CITY in maintaining the stone system. Should the CITY incur attorney's fees and/or costs in enforcing the agreement and/or in Storm Water Easement and Maintenance Agreement Page 2 of 23 maintaining or collecting maintenance fees, the PROPERTY OWNER agrees to pay reasonable attorney's fees and all costs incurred by the CITY. Section 4, ACKNOWLEDGMENT OF OTHER ENFORCEMENT ACTIONS PROPERTY OWNER acknowledges 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. EXECUTED as of the date first written above. O~ ner ate `1 I 1 E11bL4 Owner Date STATE OF WASHINGTON) ) ss COUNTY OF KING ) }cr r ICIAL SEX Celia Marie Warren Notary Public State of Washington 8 ~.0.a My Comm Expires : p . 4, 006 I certify that I know or have satisfactory evid ace that GY~i 1~IYLS and l!d _ ' L is/are the person(s) who appeared before me, and said individual(s) acknowledged that he/she/they signed this instrument and acknowledged it to be his/her/their free and voluntary act for the uses and purposes mentioned in this instrument. Dated j- Notary Public in-and for h- State of Washington Residing at My appointment expires Storm Water Easement and Maintenance Agreement Page 3 of 23 CITY OF AUBURN Ti Carlaw, 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 R ? /p ja BADq ► ~;D~OTAAy9~`cnt I L~ 10 .0 ; Notary Pub 'c in and for the St too Washington Residing at (A-^( y~~ 00 40, tP, • rr.t9 My appointment expires I l ! o KTitlb File: # 1078 REF. EI:Development\Forms\Legal Documents•'\2006 Storm Water Easement and Maintenance Agreement Page 4 of 23 EXHIBIT A LEGAL DESCRIPTIONS PARCEL C LEGAL DESCRIPTION Lots 4, 5, 6, 7, 8 and 9 in Block 5 of Hart's First Addition to the Town of Auburn, according to plat recorded in Volume 20 of Plats at Page 23, records of King County, Washington; Except that portion of Lot 6 conveyed to the City of Auburn by deed recorded February 14, 1980 under Recording No. 8002140820. Storm Water Easement and Maintenance Agreement Page 5 of 23 EXHIBIT B SIMMONS CONSTRUCTION, INC. PROPOSED PARKING LOT STORMWATER POLLUTION PREVENTION PLAN 1120 'A' STREET SOUTHEAST AUBURN, WASHINGTON OWNER: JOSEPH SIMMONS & SUSAN SIMMONS C/O JOSEPH SIMMONS CONSTRUCTION, INC. P.O. BOX 27089 SEATTLE, WASHINGTON 98165 (206) 362-7227 SITE TAX PARCEL NO. 314160-0455; 0445 GRADING PERMIT NO. 05.0031 PREPARED BY., MARK C. SIEGENTHALER P.E., P.L.S. 561644 TH AVENUE SOUTHWEST SEATTLE, WASHINGTON 98136 (206) 935-8323 Storm Water Easement and Maintenance Agreement Page 6 of 23 STORM WATER POLLUTION PREVENTION MAINTENANCE and OPERATION SCHEDULE for SITE IMPROVEMENTS FOR ALL TUNE AND LUBE GRA05-0031 Site Address: The project is located Range 5 East, W.M., 314160-0455; 0445. Introduction: in the NW of Section 19, Township 21 North, at 1120 'A' Street S.E. The tax parcel number is This storm water pollution prevention plan has been prepared to address the City of Auburn's site development and storm drainage requirements for the proposed Site Improvements For All Tune and Lube, located at 1120 'A' Street S.E. The site has an area of approximately 0.275 acres and is currently a used office furniture retail shop and parking lot. The subject site will be a site improvement for an All Tune and Lube automobile maintenance business with a remodeled building and a revised parking lot. The subject site will have 0.251 acres of impervious surface and 0.024 acres of landscaping. Remodeling of the primary building will not affect its 0.168-acre footprint. 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 bioretention cell and infiltration bed located adjacent to and under the parking lot. The storm water up to the 100-year storm will be infiltrated into the sandy soil under the site. Should overflow occur, the flow will be conveyed to a City of Auburn catch basin located along the north curb line of 12th Street S.E. The City of Auburn piped storm drainage system flows from this catch basin to a similar catch basin along the south curb of 12th Street S.E., then flows eastward in 12th Street S.E. Storm Water Easement and Maintenance Agreement Page 7 of 23 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. 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, bioretention cell, 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, August 2001) No. 1 - Detention Ponds No. 2 - Infiltration No. 4 - Control Structure/Flow Restrictor No. 5 - Catch Basins No. 8 - Biofiltration Swale (do not encourage grass) No. 14 - Sand Filters (below ground/enclosed) No. 16 - Baffle Oil/Water Separators No. 18 - Catch Basin Inserts Treatment BMP'S: A bioretention cell has been installed to treat runoff for conventional pollutants. The bioretention cell was designed to treat 64% of the 2-year storm event (water quality storm) for water quality treatment. In addition, the detention pond was designed to 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. 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 of Auburn Storm Drainage Utility section. Storm Water Easement and Maintenance Agreement Page 8 of 23 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. To ensure proper water quality and treatment, the bioretention/infiltration must be properly maintained. Be careful to avoid introducing landscape fertilizer to receiving waters or groundwater. If wetpond side slopes become eroded over 2" deep, stabilize by using appropriate erosion control measures (e.g., rock reinforcement, planting of grass, compaction). Catch basins shall be cleaned when sump is 1/3' full of sediment or debris. Person of Responsibility: Mr. Joseph Simmons Simmons Construction, Inc. 3223 N.E. 125th Street Seattle, WA 98165 (206) 362-7227 Design Engineer: Mark Siegenthaler, P.E., P.L.S. 5616 44th Avenue S.W. Seattle, WA 98136 (206) 935-8323 Plan and/or Information Updates: 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. Storm Water Easement and Maintenance Agreement Page 9 of 23 INSPECTION/MAINTENANCE CHECKLIST STRUCTURE DATE OF INSPECTION/MAINTENANCE Results/ Maintenance Date Inspection All Catch Basins Results Maintenance Done Bioretention Cell Inspection Results Maintenance Done Conveyance and Inspection Transmission Pipes Results Maintenance Done Infiltration Cell Inspection Results Maintenance Done Flow Distribution Inspection Structure Results Maintenance Done Storm Water Easement and Maintenance Agreement Page 10 of 23 DOE Storm Water Management Manual for Western Washington, (August 2001) 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. 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. Storm Water Easement and Maintenance Agreement Page I 1 of 23 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 site. cubic feet per 1,000 square feet {this 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 No danger of poisonous vegetation Vegetation and vegetation which may constitute a where maintenance personnel or the noxious weeds hazard to maintenance personnel or public might normally be. (Coordinate the public. with local health department.) Any evidence of noxious weeds as Complete eradication of noxious weeds defined by State or local regulations. may not be possible. Compliance with State or local eradication policies (Apply requirements of adopted IPM required. policies for the use of herbicides). Contaminants Any evidence of oil, gasoline, No contaminants or pollutants present. and Pollution contaminants or other pollutants. (Coordinate removal/cleanup with local water quality response agency). Rodent Holes Any evidence of rodent holes if Rodents destroyed and dam or berm facility is acting as a dam or berm, or repaired. (Coordinate with local health any evidence of water piping through department; coordinate with Ecology dam or berm via rodent holes. Dam Safety Office if pond exceeds 10 acre-feet.) Storm Water Easement and Maintenance Agreement Page 12 of 23 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 function. the facility. (Coordinate trapping of beavers and removal of dams with appropriate permitting agencies.) Insects When insects such as wasps and Insects destroyed or removed from hornets interfere with maintenance site. activities. Apply insecticides in compliance with adopted IPM policies. Tree Growth Tree growth does not allow Trees do not hinder maintenance and Hazard maintenance access or interferes activities. Harvested trees should be Trees with maintenance activity (i.e., slope recycled into mulch or other beneficial mowing, silt removal, vactoring, or uses (e.g., alders for firewood). equipment movements). If trees are not interfering with access or Remove hazard trees. maintenance, do not remove. If dead, diseased, or dying trees are 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 using of Pond where cause of damage is still appropriate erosion control measure(s); present or where there is potential for e.g., rock reinforcement, planting of continued erosion. grass, compaction. Any erosion observed on a If erosion is occurring on compacted compacted berm embankment. berms a licensed civil engineer should be consulted to resolve source of erosion. Storage Area Sediment Accumulated sediment that exceeds Sediment cleaned out to designed 10% of the designed pond depth pond shape and depth; pond reseeded unless otherwise specified or affects if necessary to control erosion. inletting or outletting condition of the facility. Liner (If Liner is visible and has more than Liner repaired or replaced. Liner is Applicable) three 114-inch holes in it. fully covered. Storm Water Easement and Maintenance Agreement Page 13 of 23 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 Discemable water flow through pond Piping eliminated. Erosion potential berm. Ongoing erosion with 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 root Overflow/ creates blockage problems and may system is small (base less than 4 Spillway and cause failure of the berm due to inches) the root system may be left in Berms over 4 uncontrolled overtopping. place. Otherwise the roots should be feet in height. removed and the berm restored. A Tree growth on berms over 4 feet in licensed civil engineer should be height may lead to piping through the consulted for proper berm/spillway berm which could lead to failure of restoration. the berm. Piping Discemable water flow through pond Piping eliminated. Erosion potential berm. Ongoing erosion with resolved. potential 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 restored to Overflow/ Overflow/ native soil in area five square feet or 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." Storm Water Easement and Maintenance Agreement Page 14 of 23 No. 2 - Infiltration Maintenance Defect Conditions When Maintenance Is Results Expected Component Needed When Maintenance Is Performed General Trash & Debris See "Detention Ponds" (No. 1). See "Detention Ponds" (No. 1). Poisonous/Noxious See "Detention Ponds" (No. 1). See "Detention Ponds" Vegetation (No. 1). Contaminants and See "Detention Ponds" (No. 1). See "Detention Ponds" Pollution (No. 1). Rodent Holes See "Detention Ponds" (No. 1). See "Detention Ponds" (No. 1). Storage Area Sediment Water ponding in infiltration pond after Sediment is removed rainfall ceases and appropriate time and/or facility is cleaned allowed for infiltration. so that infiltration system works according to (A percolation test pit or test of facility design. indicates facility is only working at 90% of its designed capabilities. If two inches or more sediment is present, remove). Filter Bags (if Filled with Sediment Sediment and debris fill bag more than 112 Filter bag is replaced or applicable) and Debris full. system is redesigned. Rock Filters Sediment and By visual inspection, little or no water flows Gravel in rock filter is Debris through filter during heavy rainstorms. replaced. Side Slopes of Erosion See "Detention Ponds" (No. 1). See "Detention Ponds" Pond (No. 1). Emergency Tree Growth See "Detention Ponds" (No. 1). See "Detention Ponds" Overflow Spillway (No. 1). and Berms over 4 feet in height. Piping See "Detention Ponds" (No. 1). See "Detention Ponds" (No. 1). Emergency Rock Missing See "Detention Ponds" (No. 1). See "Detention Ponds" Overflow Spillway (No. 1). Erosion See "Detention Ponds" (No. 1). See "Detention Ponds" (No. 1). Pre-settling Facility or sump 6" or designed sediment trap depth of Sediment is removed. Ponds and Vaults filled with Sediment sediment. and/or debris Storm Water Easement and Maintenance Agreement Page 15 of 23 No. 5 - Catch Basins Maintenance Defect Conditions When Maintenance Is Needed Results Expected When Component Maintenance is performed General Trash & Trash or debris which is located immediately No Trash or debris 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 free blocking more than 1/3 of its height. of trash or debris. Dead animals or vegetation that could No dead animals or generate odors that could cause complaints vegetation present within or 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 the riser rings or top slab frame 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 secure at basin wall. joint 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 No vegetation blocking more than 10% of the basin opening. opening to basin. Storm Water Easement and Maintenance Agreement. Page 16 of 23 No. 5 -Catch Basins Maintenance Defect Conditions When Maintenance is Needed Results Expected When Component Maintenance is performed Vegetation growing in inlet/outlet 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. Catch basin cover is Cover Place Any 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 112 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, standards and allows misalignment, rust, cracks, or sharp edges. maintenance person safe access. Metal Grates Grate opening Grate with opening wider than 7!13 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 17 of 23 No. 8 - Typical Biofiltration Swale Maintenance Defect or Condition When Recommended Maintenance to Correct Component Problem Maintenance is Needed Problem General Sediment Sediment depth exceeds 2 Remove sediment deposits on grass Accumulation on inches. treatment area of the bio-Swale. When Grass finished, swale should be level from side to side and drain freely toward outlet. There should be no areas of standing water once inflow has ceased. Standing Water When water stands in the Any of the following may apply: remove swale between storms and sediment or trash blockages, improve does not drain freely, grade from head to foot of swale, remove clogged check dams, add underdrains or convert to a wet biofiltration swale. Flow spreader Flow spreaders uneven or Level the spreader and clean so that clogged so that flows are not flows are spread evenly over entire swale uniformly distributed through width. entire swale width. Constant When small quantifies of Add a low-flow pea-gravel drain the length Baseflow water continually flow through of the swale or by-pass the base flow the swale, even when it has around the swale. been dry for weeks, and an eroded, muddy channel has formed in the swale bottom. Poor Vegetation When grass is sparse or bare Determine why grass growth is poor and Coverage or eroded patches occur in correct that condition. Re-plant with plugs more than 10% of the swale of grass from the upper slope: plant in the bottom. swale bottom at 8-inch intervals. Or re- seed into loosened, fertile soil. Vegetation When the grass becomes Mow vegetation or remove nuisance excessively tall (greater than vegetation so that flow not impeded. 10-inches); when nuisance Grass should be mowed to a height of 3 weeds and other vegetation to 4 inches. Remove grass clippings. start to take over. Excessive Grass growth is poor If possible, trim back over-hanging limbs Shading because sunlight does not and remove brushy vegetation on reach swale. adjacent slopes. Inlet/Outlet Inletloutlet areas clogged Remove material so that there is no with sediment and/or debris. clogging or blockage in the inlet and outlet area. Trash and Trash and debris Remove trash and debris from bioswale. Debris accumulated in the bio-swale. Accumulation Storm Water Easement and Maintenance Agreement Page 18 of 23 No. 8 - Typical Biofiltration Swale Maintenance Component Defect or Problem Condition When Maintenance is Needed Recommended Maintenance to Correct Problem Erosion/Scouring Eroded or scoured swale For ruts or bare areas less than 12 inches bottom due to flow wide, repair the damaged area by filling channelization, or higher with crushed gravel. If bare areas are flows. large, generally greater than 12 inches wide, the swale should be re-graded and re-seeded. For smaller bare areas, overseed when bare spots are evident, or take plugs of grass from the upper slope and plant in the swale bottom at 8-inch intervals. Storni Water Easement and. Maintenance Agreement Page 19 of 23 No. 14-Sand Filters (below ground/enclosed) Maintenance Defect Condition When Maintenance is Results Expected When Component Needed Maintenance is Performed Below Ground Sediment Sediment depth exceeds 1/2-inch. No sediment deposits on sand Vault. Accumulation on filter section that which would Sand Media impede permeability of the filter Section section. Sediment Sediment accumulation in vault No sediment deposits in first Accumulation in bottom exceeds the depth of the chamber of vault. Pre-Settling sediment zone plus 6-inches. Portion of Vault Trash/Debris Trash and debris accumulated in Trash and debris removed from Accumulation vault, or pipe inlet/outlet, floatables vault and inlet/outlet piping. and non-floatables. Sediment in When drain pipes, cleanouts become Sediment and debris removed. Drain full with sediment and/or debris. Pipes/Cleanouts Short Circuiting When seepage/flow occurs along the Sand filter media section re-laid vault walls and corners. Sand and compacted along perimeter eroding near inflow area. of vault to form a semi-seal. Erosion protection added to dissipate force of incoming flow and curtail erosion. Damaged Pipes Inlet or outlet piping damaged or Pipe repaired and/or replaced. broken and in need of repair. Access Cover Cover cannot be opened, Cover repaired to proper working Damaged/Not corrosion/deformation of cover. specifications or replaced. Working Maintenance person cannot remove cover using normal lifting pressure. Ventilation Ventilation area blocked or plugged. Blocking material removed or cleared from ventilation area. A specified % of the vault surface area must provide ventilation to the vault interior (see design specifications). Vault Structure Cracks wider than 112-inch or Vault replaced or repairs made Damaged: evidence of soil particles entering the so that vault meets design Includes Cracks structure through the cracks, or specifications and is structurally in Walls, Bottom, maintenance/inspection personnel sound. Damage to determine that the vault is not Frame and/or structurally sound. Top Slab. Cracks wider than 112-inch at the Vault repaired so that no cracks joint of any inlet/outlet pipe or exist wider than 1/4-inch at the evidence of soil particles entering joint of the inlet/outlet pipe. through the cracks. Storm Water Easement and Maintenance Agreement Page 20 of 23 No. 14-Sand Filters (below groundlenclosed) Maintenance Component Defect Condition When Maintenance Is Needed Results Expected When Maintenance is Performed Baffles/Internal Baffles or walls corroding, cracking, Baffles repaired or replaced to walls warping and/or showing signs of specifications. failure as determined by maintenance/inspection person. Access Ladder ladder is corroded or deteriorated, Ladder replaced or repaired to Damaged not functioning properly, not securely specifications, and is safe to use attached to structure wall, missing as determined by inspection rungs, cracks, and misaligned. personnel. Storm Water Easement and Maintenance Agreement Page 21 of'23 No. 16 - Baffle Oifflater Separators (API Type) Maintenance Defect Condition When Maintenance is Results Expected When Component Needed Maintenance is Performed General Monitoring Inspection of discharge water for Effluent discharge from vault should obvious signs of poor water be clear with out thick visible sheen. quality. Sediment Sediment depth in bottom of vault No sediment deposits on vault Accumulation exceeds 6-inches in depth. bottom that would impede flow through the vault and reduce separation efficiency. Trash and Debris Trash and debris accumulation in Trash and debris removed from Accumulation vault or pipe inlet/outlet, floatables vault and inletloutlet piping. and non-floatables. Oil Accumulation Oil accumulations that exceed 1 Extract oil from vault by vactoring. inch, at the surface of the water. Disposal in accordance with state and local rules and regulations. Damaged Pipes Inlet or outlet piping damaged or Pipe repaired or replaced. broken and in need of repair. Access Cover Cover cannot be opened, Cover repaired to proper working Damaged/Not corrosion/deformation of cover. specifications or replaced. Working Vault Structure Vault replaced or repairs made so Damage - Includes that vault meets design Cracks in Walls See "Catch Basins" (No. 5). specifications and is structurally Bottom, Damage to sound. Frame and/or Top Slab Cracks wider than 1/2-inch at the Vault repaired so that no cracks joint of any inlet/outlet pipe or exist wider than 114-inch at the joint evidence of soil particles entering of the inlet/outlet pipe. through the cracks. Baffles Baffles corroding, cracking, Baffles repaired or replaced to warping and/or showing signs of specifications. failure as determined by maintenance/inspection person. Access Ladder Ladder is corroded or Ladder replaced or repaired and Damaged deteriorated, not functioning meets specifications, and is safe to properly, not securely attached to use as determined by inspection structure wall, missing rungs, personnel. cracks, and misaligned. Storm Water Easement and Maintenance Agreement Page 22 of 23 No. 18 - Catch Basin Inserts Maintenance Defect Conditions When Maintenance Results Expected When Component is Needed Maintenance is Performed General Sediment When sediment forms a cap No sediment cap on the insert Accumulation over the insert media of the media and its unit. insert and/or unit. Trash and Debris Trash and debris accumulates Trash and debris removed from Accumulation on insert unit creating a insert unit. Runoff freely flows blockage/restriction. into catch basin. Media Insert Not Effluent water from media insert Effluent water from media insert Removing Oil has a visible sheen. is free of oils and has no visible sheen. Media Insert Water Catch basin insert is saturated Remove and replace media Saturated with water and no longer has the insert. capacity to absorb. Media Insert-Oil Media oil saturated due to Remove and replace media Saturated petroleum spill that drains into insert. catch basin. Media Insert Use Media has been used beyond Remove and replace media at Beyond Normal the typical average life of media regular intervals, depending on Product life insert product. insert product. Storm Water Easement and Maintenance Agreement Page 23 of 23