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HomeMy WebLinkAbout5.1056 Original ContractWhen recorded, return to: 2010 1254056 Page 1 of 44 Agreement Peninsula College Clallam County Washington 07/14/2010 03 07 36 PM 1111 i I 11,L4 ilnligi leriVe! Iii Ina li nlii 11 111 Deborah Frazier, Vice President for Administrative Services, Peninsula College, 1502 E. Lauridsen Blvd., Port Angeles, WA 98362. Stormwater Engineer, Public Works and Utilities Department, City of Port Angeles, P. O. Box 1150, Port Angeles, WA 98362. AGREEMENT FOR MAINTENANCE, REPAIR AND OPERATION OF STORM DRAINAGE FACILITIES FOR THE PENINSULA COLLEGE ATHLETIC FIELDS AND PARKING LOT THIS AGREEMENT made and entered into this �y f day of July, 2010 by and between Peninsula College, whose address is 1502 E. Lauridsen Blvd., Port Angeles, WA, 98362, hereinafter referred to as Owner and City of Port Angeles, a Washington municipal corporation whose address is P. O. Box 1150, Port Angeles, Washington, 98362, hereinafter referred to as the City. WHEREAS, the Owner warrants and represents that it is the sole and exclusive owner of the subject premises as described in paragraph 1 below with full and exclusive authority to execute this Agreement and that all necessary steps precedent to its execution have been undertaken, make the obligation binding upon Owner; and WHEREAS, the Owner has constructed storm drainage facilities for the Peninsula College Athletic Fields and Parking Lot; and, WHEREAS, the Owner is required pursuant to Chapter 5.11 of City of Port Angeles Urban Services Standards and Guidelines (Maintenance of Private Stormwater Systems, September 2009) to operate and maintain all storm drainage facilities at the Peninsula College Athletic Fields and Parking Lot sites; and WHEREAS, the City and Owners are mutually desirous of providing assurances for the future continued maintenance, repair, and operation of storm drainage facilities for Peninsula College Athletic Fields and Parking Lot, NOW, THEREFORE, in consideration of the agreements herein provided and other good and valuable consideration, the parties agree as follows: Pg. 1 5 .105(0 1. Owner warrants and represents that it has sole and exclusive authority and sole and exclusive right, title, and interest in the subject property situated in the City of Port Angeles, Clallam County, Washington, legally described as: Peninsula College Campus Clallam County Assessor Parcel Nos. 12 -0000 and 21 -0000 Clallam County Assessor Property ID Nos. 66786 and 66845 Clallam County Assessor Geographic ID Nos. 06301141200000000 and 0630142100000000 Port Angeles, WA 2. The Owner, for itself and its successors and assigns, covenants and agrees to maintain, repair, and replace in good and serviceable condition any and all storm drainage infrastructure within and for Peninsula College Athletic Fields and Parking Lot. Such maintenance activities shall be performed as described in the Stormwater Facility "Operation and Maintenance Manual" for the Peninsula College Athletic Fields and Parking Lot; and that in that event it is contacted by the City of Port Angeles Public Works and Utilities Department, it will perform any and all reasonable and necessary maintenance, repair, or replacement as indicated by the Public Works and Utilities Department. Owner shall perform all such work in a timely fashion, completed to the satisfaction of the City. 3. The City shall not and it does not serve as a guarantor of the performance of the Owner nor does the City make any representations or warranties with regard to the design or capability of storm drainage facilities. The City may, but is not required, in its sole discretion to elect or repair, replace, or maintain storm drainage facilities if in the sole opinion of the City the Owner has failed to do so within the time frame set forth in the Maintenance Timeline established in the Stormwater Facility Operation and Maintenance Manual. All such charges associated with such work, including administrative costs and professional fees shall be charged to the Owner and payable to the Owner forthwith. 4. This Agreement shall be binding upon the heirs, successors, and assigns of the Owner. 5. This Agreement may only be modified in writing by a document executed by the Owner and City. Pg. 2 IN \*ITNESS HEREOF, CITY OF PORT ANGELES sets his/her /their hand(s) and seal(s) this Jf day of July, 2010. CITY OF POWiF ANGELES: i City Authorized Ipresentative Signature Vephtk Sperr Printed Name Its: Ci4 y En- I/leer Title of City Authorized Representative STATE OF WASHINGTON) COUNTY OF CLALLAM On this /4 day of July, 2010, before me personally, appeared: 5►De_rr 1R i c< Croo who executed the foregoing AGREEMENT FOR MAINTENANCE, REPAIR, AND OPERATION OF STORM DRAINAGE FACILITIES FOR THE PENINSULA COLLEGE ATHLETIC FIELDS AND PACING LOT by his/her /their signed. My Commission Expires: I o t 9 /a o/ 1 Notary Public, C /a p ar11 County, Washington. Pg. 3 4,9 SOUR PUMA 1:14, IN WITNESS HEREOF, Owner sets his/her /their hand(s) and seal(s) this -6 day of July, 2010. 0 Owner Signature Lc lc C recoi Printed Name Its: Aecr LJ 'itec -tro/2- Title of Owner Representative STATE OF WASHINGTON) COUNTY OF CLALLAM On this WI) day of July, 2010, before me personally, appeared: 5 ef 5 ancj cl< Croot who executed the Foregoing AGREEMENT FOR MAINTENANCE, REPAIR, AND OPERATION OF STORM DRAINAGE FACILITIES FOR THE PENINSULA COLLEGE ATHLETIC FIELDS AND PING LOT by his /her /their signed. Notary Public, C /a/ 1 en County, Washington. My Commission Expires: 1 4/ /.,)c)/ I Pg. 4 I<I\ Civil Engineering John Knowles Associates. Inc. Ph (253) 539 -1400 Fax (253) 539-1500 E-mail jkaavd @comcast net Peninsula College Athletic Fields Port Angeles, WA Operation Maintenance Manual January 2010 Revised June 2010 ATTACHMENT "A" PENINSULA COLLEGE ATHLETIC FIELDS Operation Maintenance (O &M) Manual Section 1— Required Maintenance and Estimates Costs This project's stormwater management system consists of pea gravel trenches with perforated underdrain pipes under the synthetic turf to address precipitation and runoff tributary to the field. The field drainage will be detained within trenches and released slowly through a flow control orifice structure located within a Type 2 catch basin at the NW corner of the field. The drainage facilities will rgquire routine maintenance. The Flow Control Structure and porous asphalt paving will require periodic inspection. The control structure may require sediment removal penodically based upon inspections, and the porous pavement may require pressure washing. The conveyance pipes will require maintenance as well. Yearly maintenance costs are estimated as follows: Maintenance of Flow Control Structure Maintenance of porous AC walkway Jetting of tightline conveyance piping and field underdrain perforated piping Yearly Total Section 2 Responsible Organization 500 /yr 500 /yr 500 /vr 1,500 The project owner, Peninsula College, shall be responsible for the operation and maintenance of all onsite permanent storm system components. The college shall be responsible for payment of City charges should the City have to conduct repairs /activities due to hazardous conditions caused by inadequate operation and maintenance of the storm drainage BMPs. The owner of the project is currently: Peninsula College 1502 E Lauridsen Blvd. Port Angeles, WA 98362 This O &M Manual shall be stored at the offices of Peninsula College; a copy of the Manual shall also be available at the construction site during construction. It must be made available for City inspection. The stormwater plan (BDA construction plan Sheets D1.1 and C2.1) are enclosed at the end of this O &M Manual. The drawings show the project's property limits, site improvements, and storm drainage system. Section 3 Vegetation Maintenance Plan All disturbed areas shall be protected from erosion using BMPs indicated on the construction plans. Cut and fill slopes shall be hydroseeded, covered with straw, mulched, or covered with plastic sheeting as needed to inhibit erosion. The owner and the contractor shall maintain such protective measures through the construction period and until final development of the site commences. A construction stormwater pollution prevention plan (SWPPP) has been prepared by Bruce Dees and Associates to address construction period runoff. Section 4— Source Control Typical pollutants associated with normal operations and construction activities, such as oil spills from oil changes, leaks of hydraulic fluids, etc. should not pose a significant threat to downstream systems, nor aquifers, because source control measures shall be in place; a source control strategy has been prepared for this project and it is included as Attachment `B'. Section 5 Purpose of O &M Manual The purpose of this O &M Manual is to provide stormwater facility operations and maintenance protocols for the drainage facilities serving the Peninsula College athletic fields on the campus of the college in Port Angeles, WA. This manual provides background information for the development, identifies all private stormwater facilities to be maintained, names the person legally responsible for maintenance, grants the City of Port Angeles personnel access for annual inspections, details requirements for maintaining records, and provides a maintenance checklist and log. This manual is made part of the formal "Agreement for Maintenance, Repair, and Operation of Storm Drainage Facilities for the Peninsula College Athletic Fields" between the owner (Peninsula College) and the City of Port Angeles. Section 6 Project Background The project involves improvements to a 3.4 acre grass sports field including new synthetic turf surfacing, perimeter walking /running track, soccer screens, fencing, minor retaining wall improvements, lighting, and appurtenant athletic field improvements. The project site is located within the northwest portion of the campus at 1502 East Lauridsen Blvd., Port Angeles, Washington. A -2 Section 7 Stormwater Facilities All athletic field drainage facilities will be privately maintained by campus maintenance staff. The facilities are depicted on the "D" "C" sheets of the athletic field construction documents prepared by Bruce Dees Associates, Inc. and John Knowles Associates, Inc. A general list of facilities to be privately maintained follows: 4" and 8" diameter field underdrain perforated piping within pea gravel trenches. 6" diameter wall and French drains along the field perimeter. Area/Yard drains. Type 1 catch basins. Stormwater detention outlet control structure (Type 2 manhole with standpipe). Cleanouts for underdrain and wall drain piping. 8" and 12" tightline storm piping. Refer to the enclosed excerpts from the construction drawings for a layout of stormwater facilities to be maintained. Section 8 Maintenance Personnel Peninsula College is the entity legally responsible for the continued operation, maintenance, and repair of the permitted stormwater facility for the life of the athletic fields, or until the City of Port Angeles has been notified in writing of a transfer of responsibility. Maintenance will be performed by Peninsula College support staff and /or contracted consultants and /or contractors Section 9 City inspections The City of Port Angeles shall be allowed access to the site for an annual inspection of all permitted stormwater facilities. Section 10 Retention of Records The person legally responsible for the site shall maintain all records of maintenance inspections, repairs, warning letters, and notices of violations. These records shall be made available for viewing to the City of Port Angeles within seven days of request. Section 11— Maintenance Proper maintenance is vital for adequate functioning of the stormwater facilities. The stormwater facilities will have annual inspections. See stormwater maintenance checklists contained on later pages of this manual. The owner shall make photocopies of the checklists as necessary in keeping the attached sheets as a clean, original copy. Refer to the enclosed excerpts from the construction drawings for a layout of stormwater facilities to be maintained. A -3 Section 12 Maintenance and Reoair Loq Record any required maintenance or repair on the log sheet. Make photocopy of the log sheet as necessary, keeping the attached sheet as a clean, original copy. Refer to the enclosed excerpts from the construction drawings for a layout of stormwater facilities to be maintained. Section 13 Maintenance Timeline This agreement and covenant requires that when defects to the stormwater system are found during the annual inspection, the needed repair shall be completed within with timeline defined below: Within six months for catch basins, are drains, trench drains, cleanouts, and pipe outlets. Within one year for typical maintenance for flow control structure. Within two years for maintenance that requires capital construction of less than $25,000. A-4 ATTACHMENT "A" Maintenance Program Cover Sheet for Peninsula College Inspection Period: Number of Sheets Attached: Date Inspected: Name of Inspector: Inspector's Signature: A -5 Instructions for use of Maintenance Checklist The following pages contain maintenance needs for most of the components that are part of your drainage system, as well as for some components that you may not have. Let the City know if there are any components missing from these pages. Ignore the requirements that do not apply to your system. You should plan to complete a checklist for all system components on the following schedule: 1) Monthly from November through April. 2) Once in late summer (preferably September). 3) After every major storm (use 2" in 24 hours as a guideline) Using photocopies of these pages, check off the problems that you looked for each time you did an inspection. Add comments on problems found and actions taken. Keep these "checked" sheets in your files, as they will be used to write your annual report. Some items do not need to be looked at every time an inspection is done. A -6 ATTACHMENT "A" (CONTINUED) Maintenance Checklist No. 4 Control Structure/Flow Restrictor Maintenance Compon General Cleanout Gate Overflow Pipe Manhole Catch Basin Defect Trash and Debris (Includes Sediment) Structural Damage Damaged or Missing Onfice Plate Damaged or Missing Obstructions Obstructions See "Closed Detention Systems" (No 3). See "Catch Basins" (No. 5). Condition When Maintenance is Needed Material exceeds 25% of sump depth or 1 foot below orifice plate. Structure is not securely attached to manhole wall. Structure is not in upnght position (allow up to 10% from plumb) Connections to outlet pipe are not watertight and show signs of rust. Any holes —other than designed holes —in the structure. Cleanout gate is not watertight or is missing. Gate cannot be moved up and down by one maintenance person Chain/rod leading to gate is missing or damaged Gate is rusted over 50% of its surface area Control device is not working properly due to missing, out of place, or bent orifice plate Any trash. debns, sediment, or vegetation blocking the plate Any trash or debns blocking (or having the potential of blocking) the overflow pipe. See "Closed Detention Systems" (No. 3) See "Catch Basins" (No 5) A -7 Results Expected When Maintenance is Performed Control structure orifice is not blocked. All trash and debris removed. Structure securely attached to wall and outlet pipe Structure in correct position Connections to outlet pipe are water tight, structure repaired or replaced and works as designed. Structure has no holes other than designed holes. Gate is watertight and works as designed. Gate moves up and down easily and is watertight Chain is in place and works as designed Gate is repaired or replaced to meet design standards. Plate is in place and works as designed Plate is free of all obstructions and works as designed Pipe is free of all obstructions and works as designed See "Closed Detention Systems" (No 3) See "Catch Basins" (No 5) No. 5 Catch Basins Maintenance Defect Coinponent General Trash Debris Sediment Structure Damage to Frame and/or Top Slab Fractures or Cracks in Basin /ails: Bottom Vegetation Conditions When Maintenance is Needed Trash or debns which is located immediately in front of the catch basin opening or is blocking intetting capacity of the basin by more than 10%. Trash or debris (in the basin) that t «ds 80 percent of the sump depth as measured from the bottom of basin to invert of the lowest pipe into or out of the basrn, 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 blocking more than 1/3 of its height Dead animals or vegetation that could generate odors that could cause complaints or dangerous gases (e g.. methane Sediment (in the basal' that exceeds eo percent of the sump depth as measured from the bottom of basin to invert of the fewest pipe into or out of the basin, but rn no case Tess than a minimum of 8 inches clearance from the sediment surface to the invert of the lowest pipe Top slab has holes larger than 2 square inches or cracks wide than t/4 inch Intent is to make sure no material is writing into basin). Frame not srtt;ng flush on top stab, i.e., separation of more than 3t4 inch of the frarle from the top slab Frame not securely attached Maintenance person judges that structure rs L nscunc Grout fillet has separated or cracked wider than 1 +2 inch and longer than 1 foot at the joint of any inletoutlet pipe or any evidence of soil particles entering catch basin through cracks. Settlement/ If failure of basin has created a safety, Misalignment functrcn, or design problem. Vegetation growing across and blocking more than 1C% of the basin opening Vegetation growing in inlet/outlet pipe joints that is more than six inches tall and less than six inches apart. A -8 Results Expected When Maintenance is performed No Trash or debris located immediately in front of catch basin or on grate opening. No trash or debris in the catch basin Inlet and outlet pipes free of trash or debris No dead animals or vegetation present within the catch basin. No sediment in the catch basin Top slab is free of holes and cracks Frame is sitting flush on the riser rings or top stab and firmly attached Basle replaced Or repaired to design standards Pipe is regrouted and secure at basin wall Basin replaced or repaired to design standards No vegetation blocking opening to ba sin No vegetation or root growth presert. No. 5 Catch Basins Maintenance Defect General Trash 8 Debris Sediment Structure Damage to Frame anchor Top Slab Fractures or Cracks in Basin Walls. Bottom Settlement' Misalignment Vegetation Conditions, When Maintenance is Needed Trash or debris which is located immediately in front of the catch basin opening or is blocking inte:ting capacity of the basin by more than 10 Trash or debns (in the basin) that exceeds 6 percent of the sump depth as measured from 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 outiei pipe blocking more than 113 of its height Dead animals or vegetation that could generate odors that could cause complaints or dangerous gases (e.g., methane). Sediment On the basin) that exceeds 60 percent of the sump depth as measured from 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 5 inches clearance from the sediment surface to the invert of the lowest pipe Top slab has holes larger than 2 square inches or cracks wider than 114 inch (Intent is to make sure no material is running into basin) Frame not srtbng flush or. top slab, 1 e. separation of more than 3.4 inch of the frame from the top slab Frame not securely attached Maintenance oerson fudges that sbucture is unsound Grout fillet has separated or cracked wider than 1/2 inch and longer than 1 foot at the joint of any inlet/outlet pipe or any evidence of soil particles entering catch basin through cracks If failure of oasin has created a safety function, or design problem Vegetation growing across and blocking more than 10% of the basin opening. Vegetation growing in inlet/outlet pipe Joints that is more than six inches tall and less than six inches apart 't Resuits,Espected When ,Maintenance_ts No Trash or debris located immediately in front of catch basin or on grate opening. No trash or debris in the catch basin. Inlet and outlet pipes free of trash or debris No dead animals or vegetation present within the catch basin. No sediment in the catch basin Top slab is free of holes and cracks Frame is sitting flush on the user rings or top slab and firmly attached Basin replaced or repaired to design standards. Pipe is regrouted and secure at basin wall. Basin replaced or repaired to design standards. No vegetation blocking opening to basin. No vegetation or root growth present. No. 5 Catch Basins Maintenance Def Component Catch Basin Cover Ladder Metal Grates (If Applicable,' Maintenance Components General Metal Conditions When Maintenance is Needed Contamination See "Detention Ponds' (No. 1) and Pollution Cover Not in Cover is missing or only partially in place. Place Any open catch basin requires maintenance. Locking Mechanism Not Working Cover Difficult to Remove Ladder Rungs Unsafe Grate opening Unsafe Trash and Debris No. 6 Debris Barriers (e.g., Trash Racks) Inlet/Outlet Pipe htechanism cannot be opened by one maintenance person with proper tools. Bolts into frame have less than 1/2 inch of thread. One maintenance person cannot remove lid after applying normal lifting pressure (Intent is keep cover from sealing off access to maintenance Ladder is unsafe due to missing rungs. not securely attached to basin wall, misalignment. rust, cracks. or sharp edges. Grate with opening wider than 718 inch. Trash and debris that is blocking more than 20% of grate surface inletting capacity. Damaged or Grate missing or broken member(s) of the Missing. grate. Defect Condition When Maintenance is Needed Trash and Trash or debris that is plugging more Debris than 20% of the openings in the barrier Damaged, Bars are bent out of shape more than 3 Missing enches Bars. Bars are missing or entire barrier missing. Bars are loose and rust is causing 5C% detenoraticn to any part of barrier Debns barrier missing or not attached to Pipe A -10 Results Expected Maintenance is performed No pollution present Catch basin cover is closed Mechanism opens with proper toots Grate opening meets design standards Grate free of trash and debris Results Expected When Maintenance is Performed Barrier cleared to design flow capacity Barner replaced or repaired to design standards. Barner firmly attached to pipe Cover can be removed by one maintenance person Ladder meets design standards and allows maintenance person safe access. Grate is in place and meets design standards. Bars in place with no bends more than 14 inch Bars in place according to design. INSPECTION CERTIFICATION Peninsula College Athletic Fields Stormwater System Inspection 1 certify that this report is true, accurate, and complete, to the best of my knowledge and belief." Inspection completed on: by: (print signature) Title Qualification of Inspector: PENINSULA COLLEGE ATHLETIC FIELDS STORMWATER SYSTEM MAINTENANCE AND REPAIR LOG Date Item /Facility Description Performed Comments by MAINTENANCE CERTIFICATION "I certify that this report is true, accurate, and complete, to the best of my knowledge and belief." Inspection completed on: by: (print signature) Title Qualification of Inspector: A -12 T 4 Peninsula College Synthetic Turf Soccer Reid Port Angola. IIuhln$ton DEMOLITION T.E.$ C. PLAN 01;1104 0,1 ',yam 1 1 ee 1 .0101 .101110111 oat 1 111 1 1 I 1 1 1 L J LJ BRUCE DEES& ASSOCIATES rnit' .v.soie i t 04 WO* 0 11 i t e_ gg `1 e n b' 1 w p6� w r V. k' o a l� i iA 3 p t a k 03v A i d ATTACHMENT "B" Pollution Source Control Plan PENINSULA COLLEGE ATHLETIC FIELDS January 2010 JKA #0939 GENERAL GUIDELINES FOR HAZARDOUS MATERIALS HANDLING AND SOURCE CONTROL MANAGING HAZARDOUS PRODUCTS Operators and maintenance staff should buy and use only what is needed. Leftovers need to be stored properly /safely reused, given away, recycled, or disposed of safely. Operators and maintenance staff should read labels and follow directions on the label. Hazardous products may be labeled: Danger Poisonous Volatile Combustible Caustic Explosive Waming Corrosive Flammable Caution Operators and maintenance staff should keep products in original containers and always keep them well labeled. If the product must be transferred to smaller containers, use the proper size funnel and avoid spills. Label all containers. Labels can fall off with weathering. To prevent, cover with transparent tape. To relabel, use a metal tag attached to the container or use a stencil and spray paint. Do not mix chemical substances unless recommended by the manufacturer. Use in well ventilated areas. Protect skin, eyes, nose, and mouth when necessary by wearing gloves, respirator, or other protective clothing. Keep corrosive liquids away from flammable liquids. Look for nontoxic or less toxic options (check with the State Department of Ecology Office of Waste Reduction at 1- 800 822 9933). Use all of the product before disposing of the container. There are private firms that specialize in the cleanup of spills. B -1 EQUIPMENT WASHING Thinners or solvents are not to be discharged into the sanitary or storm sewer systems when cleaning machine parts where discharge of water is required. Use alternative methods for cleaning larger equipment parts such as high pressure, high temperature water washes, or steam cleaning. Equipment washing wash water cannot be discharged into the storm or sanitary system. Small parts can be cleaned with degreasing solvents which are reused after filtering or recycled. These solvents should not discharge into any sewer. Further information is available from the Department of Ecology. SPILL CONTROL PLANNING AND CLEANUP Any spill that occurs, regardless of the size and /or type of spill, should be reported to the following four agencies: City of Port Angeles: SOURCE CONTROL ph. 360- 417 -4800 If the spill of a hazardous substance could reach surface waters, all of the following four agencies must be notified (there are fines for failing to notify): National Response Center 1- 800 -424 -8802 (24 -hour) Washington Emergency Management Division 1- 800 258 -5990 or 1- 800 OILS -911 Locally, notify the regional Department of Ecology offices: 1- 360 -407 -6300 State Emergency Response Commission 1- 800 258 -5990 Notify the owner in the event of a spill, particularly if it is hazardous. Follow manufacturer's specific clean -up instructions for different products handled on site. If a spill occurs, demobilize it as quickly as possible. If there is a chance that the spill could enter a storm drain or sewer, plug the inlet and turn off or divert any incoming water. Cover the spill with absorbent material such as kitty litter or sawdust. Do not use straw. Dispose of the used absorbent per Ecology or manufacturer's instructions. If the spill is flammable, dispose of as directed by the local fire marshall. Minimize use of commercial fertilizers. Use only that amount recommended by the manufacturer. Do not overwater lawn areas, causing excess runoff to the road storm drainage system. Do not dispose of used motor oil, cleaning fluids, waste water, or any other substance to the catch basins, grass swales, or the ground in general. Recycle all motor oils and anti freeze. Call local health department for recycling center locations. B -2 STORMWATER FACILITY OPERATION AND MAINTENANCE MANUAL FOR THE PENINSULA COLLEGE PARKING LOT IMPROVEMENTS Port Angeles, WA Prepared by: KPFF Consulting Engineers 1601 Fifth Avenue, Suite 1600 Seattle, WA 98101 Phone: (206) 622 -5822 Fax: (206) 622 -8130 Job 107467 June 2010 Peninsula College Parking Lot Improvements, Stormwater Maintenance Manual Page 1 of 5 PURPOSE The purpose of this manual is to provide a stormwater facility operations and maintenance protocols for the stormwater facilities at the Peninsula College Parking Lot Improvements in Port Angeles, WA. This manual provides background information for the development, identifies all private stormwater facilities to be maintained, names the person legally responsible for maintenance, grants City of Port Angeles personnel access for annual inspections, details requirements for maintaining records and provides a maintenance checklist and log. BACKGROUND The site is a 5.75 -acre existing asphalt parking lot. The project will consist of adding water quality treatment facilities within new parking islands and rain gardens. A new access driveway will be constructed along with new sidewalks. The project site is located at the southeast comer of East Lauridsen Boulevard and Liberty Street on the Peninsula College Campus. STORMWATER FACILITIES List of facilities to be privately maintained: (3) rain garden (5) biofiltration swales (1) StormFilter vault (2) pipe outlets (16) catch basins (1) flow control structure MAINTENANCE PERSONNEL Peninsula College shall be the entity legally responsible for the continual operation, maintenance, and repair of the permitted stormwater facility for the life of the development, or until the City of Port Angeles has been notified in writing of a transfer of responsibility. CITY INSPECTIONS The City of Angeles shall be allowed access to the site for an annual inspection of all permitted stormwater facilities. RETENTION OF RECORDS The person legally responsible for the site shall maintain all records of maintenance inspections, repairs, warning letters, and notices of violations. These records shall be made available for viewing to the City of Port Angeles within 7 days of request. Peninsula College Parking Lot Improvements, Stormwater Maintenance Manual Page 2 of 5 MAINTENANCE Proper maintenance is vital for adequate functioning of the stormwater facilities. The stormwater facilities will have annual inspections. See the Annual Maintenance Inspection Checklist on page 4. Make photocopies of the checklist as necessary keeping the attached sheets as a clean original copy. MAINTENANCE AND REPAIR LOG Record any required maintenance or repair on the log sheet on page 5. Make photocopies of the log sheet as necessary keeping the attached sheet as a clean original copy. MAINTENANCE TIMELINE This covenant requires that when defects to the stormwater system are found during the annual inspection the needed repair shall be completed within the timeline defined below: Within 6 months for catch basins, area drains, trench drains, cleanouts and pipe outlets. Within 1 year for typical maintenance for flow control structure and rain gardens. Within 2 years for maintenance, that requires capital construction of less than $25,000. Peninsula College Parking Lot Improvements, Stormwater Maintenance Manual Page 3 of 5 Drainage Feature Parking Lot Rain Garden/ Bioretention Swales Biofiltration Swales StormFilter Vault Pipe Outlets Pipe Outlets (cont.) Catch Basins Flow Control Structure I Annual Maintenance Inspection Checklist x Maintenance/Inspection To Be Performed Inspect pavement surface of accumulated sediment and debris Pavement sweeper to sweep parking lot clear of accumulated sediment and debris. See the attached checklists obtained from the Department of Ecology Stormwater Management Manual for Western Washington (SWMMWW) for No 2 Infiltration. Note that the checklist references "detention ponds" and so that has been included as well for inspection and maintenance. See the attached checklist obtained from SWMMWW No. 8 Typical Biofltration Swale See the attached checklist obtained from SWMMWW No. 15 Stormfilter and the manufacturer's maintenance manual Inspect pipe outlets for debris and sediment accumulation. Remove any debris that could block flow Erosion Inspect area around end of pipe to see if erosion of 2 inches deep or greater exists at pipe outlet. If so, install 5 square foot by 1 foot deep rock pad at outlet to dissipate the waters energy. If energy dissipater is required, see energy dissipater for curb inlets No. 7 Energy Dissipaters Structural pipe damage Examine exposed pipe for any structural damage that could impede flow. Replace section of pipe that has been damaged. See the attached checklist obtained from SWMMWW No. 5 Catch Basins See the attached checklist obtained from SWMMWW No. 4 Control Structure/Flow Restrictor See page 6 for layout of stormwater facilities to be maintained. Peninsula College Parking Lot Improvements, Stormwater Maintenance Manual Page 4 of 5 MAINTENANCE LOG Date 1 Item Facility INSPECITON CERTIFICATION Title Qualification of Inspector: 1 Description I Performed by 1 Comments "I certify that this report is true, accurate, and complete, to the best of my knowledge and belief." Inspection completed on: by: (print, signature) Peninsula College Parking Lot Improvements, Stormwater Maintenance Manual Page 5 of 5 l;. 7•: ;:fir _UUVJUU�U1 WYLIE I t/ s wax r.erna. PPE r` NA *c 4w+T d M D Page 6 B I® STORMWATER FACILITIES MAINTENANCE MAP IF mo o„ K7)P .iii y g N ...41WATtr :V -ar -`4.:,- I bo r EU• j'. No. 1— Detention Ponds REFERENCE FOR RAIN GARDEN OR BIORETENTION SWALE oMaiiitenanae. aoi General I Trash Debris Note: Nol2,. infiltration should used 1 the`, checklist,for'l rain garden sjj 0 bioretention maintenance checklis 4.6 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, exceedence of 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. Table 4.5 Maintenance Standards j0etact Ada .Y A Poisonous Vegetation and noxious weeds Inspection I Maintenance Performed 1 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. Any poisonous or nuisance vegetation which may constitute a hazard to maintenance personnel or the public. Arry evidence of noxious weeds as defined by State or local regulations. (Apply requirements of adopted IPM policies for the use of herblddes). Contaminants Any evidence doll, gasoline, and Pollution contaminants or other pollutants (Coordinate removal/cleanup with Iocal water quality response agency). Rodent Holes Any evidence of rodent holes if facility is acting as a dam or berm, or any evidence of water piping through dam or berm via rodent holes. No danger of poisonous vegetation where maintenance personnel or the public might normally be. (Coordinate with local health department) Complete eradication of noxious weeds may not be possible. Compliance with State or local eradication policies required Rodents destroyed and dam or bens repaired. (Coordinate with Iocal health department coordinate with Ecology Dam Safety Office if pond exceeds 10 acre- feet.) 4-30 Volume V Runoff Treatment BMPs February 2005 Page 7 No. 1 Detention Ponds REFERENCE FOR RAIN GARDEN OR BIOSWALE Maintenance Component Pond Berms checklis rain or bioretention 2 references No Detention hence inclusion the maintenance° checklist. Emergency Overflow/ Spillway and Berms over 4 feet in height. Note Infiltration should 1b 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 detennlne the source of the settlement. Piping Discernable water flow through pond berm. Ongoing erosion with potential for erosion to continue. (Recommend a Goethechnical engineer be called In to inspect and evaluate condition and recommend repair of condition. T ree Growth Tree growth on emergency spillways creates blockage problems and may cause failure of the berm due to uncontrolled overtopping. Tree growth on berms over 4 feet in height may lead to piping through the berm which could lead to failure of the berm. Emergency Overflow/ Spillway I Settlements Piping Emergency Overflow/ Spillway Erosion Inspection Any part of berm which has settled 4 inches lower than the design elevation. Discernable water flow through pond berm. Ongoing erosion with potential for erosion to continue. (Recommend a GoethechnIcal engineer be called In to inspect and evaluate condition and reoommend repair of condition. Only one layer of rock exists above native soli in area five square feet or larger, or any exposure of native soli at the top of out flow path of spillway. (Ri app'n Inside slopes need not be See 'Side Slopes of Pond' 1 Maintenance PerformeJj Dike Is built back to the design elevation. Piping eliminated. Erosion potential resolved. Trees should be removed. If root system Is small (base less than 4 inches) the root system may be left in place. Otherwise the roots should be removed and the berm restored. A licensed dull engineer should be consulted for proper berm/spill way restoration. Piping eliminated. Erosion potential resolved. Rocks and pad depth are restored to design standards. 4-32 Volume V Runoff Treatment BMPs February 2005 Page 9 wo.2_ infiltration AND RAIN GARDEN OR BIORETENTION SWALES 1 General Storage Area Filter Bags (if applicable) Rock Filters Side Slopes of Pond Emergency Overflow Spillway and Berms over 4 feet in height. Emergency Overflow Spillway Pre-settling Ponds and Vaults February 2005 Trash Debris Poisonous/Noxious Vegetation Contaminants and Pollution Rodent Holes Sediment Filled with Sediment and Debris Sediment and Debris Erosion Tree Growth Piping Rock Missing Erosion Facility or sump filled with Sediment and/or debris Inspection See "Detention Ponds" (No.1). See "Detention Ponds° (No. 1). See "Detention Ponds" (No. 1). See "Detention Ponds° (No. 1). Water ponding in infiltration pond after rainfall ceases and appropriate time allowed for infiltration. (A indicates fact Is only working at 90% of its designed capabilities. If two Inches or more sediment is present, remove). Sediment and debris fill bag more than 1/2 full. By visual inspection, little or no water flows through filter during heavy rain storms. See "Detention Ponds" (No. 1) See "Detention Ponds° (No. 1). See "Detention Ponds" (No. 1). See "Detention Ponds" (No. 1). See 'Detention Ponds" (No. 1). 8" or designed sediment trap depth of sediment. Volume V Runoff Treatment BMPs Page 10 Maintenance Performed See "Detention Ponds' (No.1). See "Detention Ponds" (No. 1). See "Detention Ponds" (No. 1). See 'Detention Ponds" (No. 1) Sediment Is removed and/or facility Is cleaned so that infiltration system works according to design. Filter bag is replaced or system is redesigned. Gravel in rock filter is replaced. See "Detention Ponds° (No. 1). See "Detention Ponds" (No. 1). See "Detention Ponds" (No. 1). See "Detention Ponds" (No. 1). See "Detention Ponds" (No.1). Sediment is removed. Control Structure/Flow Restlictorl General 'tweiiitenance x e fect aintenance L t x: r,� Inspection at om tep c�HC,, s; A {.;r.., u Performed A tiA2r, y y ;Cr r fit �_�i:'aa�:aiG',r.5'r';�'f,�i::4 ikn'; �r `li•.is.'f'a��'.�fr.,TSV�v�rai. ,..,...w... Overflow Pipe Obstructions Trash and Debris Material exceeds 25% of sump depth or 1 (includes Sediment) foot below orifice plate. Structural Damage Cleanout Gate Damaged or Missing Orifice Plate Damaged or Missing Obstructions Manhole See 'Closed Detention Systems" (No. 3). Catch Basin See 'Catch Basins" (No. 5). Structure is not securely attached to manhole wall. Structure is not In upright position (allow up to 10% from plumb). Connections to outlet pipe are not watertight and show signs of rust. Any holes —other than designed holes —in the structure. Cleanout gate is not watertight or is missing. Gate cannot be moved up and down by one maintenance person. Chain/rod leading to gate is missing or damaged. Gate Is rusted over 50% of Its surface area. Control device is not working properly due to missing, out of place, or bent orfice plate. Any trash, debris, sediment, or vegetation biocIdng the plate. Any trash or debris blocking (or having the potential of blocldng) the overflow pipe. See 'Closed Detention Systems' (No. 3). See "Catch Basins' (No. 5). Control structure orifice is not blocked. All trash and debris removed. Structure securely attached to wall and outlet pipe. Structure In correct position. Connections to outlet pipe are water tight structure repaired or replaced and works as designed. Structure has no holes other than designed holes. Gate is watertight and works as designed. Gate moves up and down easily and Is watertight. Chain is In place and works as designed. Gate is repaired or replaced to meet design standards. Plate Is In place and works as designed. Plate is free of all obstructions and works as designed. Pipe is free of all obstructions and works as designed. See 'Closed Detention Systems' (No. 3). See "Catch Basins' (No. 5). February 2005 Volume V Runoff Treatment BMPs 4-35 Page 11 1 No. 5 Catch Basins I C mpone t 'rr� $i �ki S )r I A g�::f�aiS.�unp�kt'Ca ..3:Wi %h,o',a!t1 t ,r ar.•r•uxe:an. n- �N•.. u..c:tun 41" rsani.:;.aa. General Trash Debris Sediment Structure Damage to Frame and/or Top Slab Fractures or Cracks In unsound. Basin walls/ Bottom Inspection Trash or debris which is located immediately In front of the catch basin opening or is blocking iniettlng capacity of the basin by more than 10 Trash or debris (In the basin) that exceeds 60 percent of the sump depth as measured from the bottom of basin to Invert of the lowest pipe into or out of the basin, but In no case Tess 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 bloddng more than 1/3 of its height. Dead animals or vegetation that could generate odors that could cause complaints or dangerous gases (e.g., methane). Sediment (in the basin) that exceeds 60 percent of the sump depth as measured from the bottom of basin to invert of the lowest pipe into or out of the basin, but in no case Tess than a minimum of 8 inches clearance from the sediment surface to the Invert of the lowest pipe. Top slab has holes larger than 2 square inches or cracks wider than 1/4 inch (Intent Is to make sure no material is running Into basin). Frame not sitting flush on top slab, i.e., separation of more than 3/4 inch of the frame from the top slab. Frame not securely attached Maintenance person judges that structure is Grout fillet has separated or cracked wider than 1/2 inch and longer than 1 foot at the 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, Misalignment function, or design problem. Vegetation than t�0% of growing basin acros ni n bloddn more Vegetation growing In inlet/outlet pipe Joints that is more than six Inches tall and less than six inches apart. 4-36 Volume V Runoff Treatment BMPs Page 12 p Maintenance Performed No Trash or debris located Immediately in front of catch basin or on grate opening. No trash or debris In the catch basin. Inlet and outlet pipes free of trash or deb No dead animals or vegetation present wfthin the catch basin. No sediment in the catch basin Top slab Is free of holes and cracks. Frame is sitting flush on the riser rinp. or slab and firmly attached Basin replaced or repaired to design standards. Pipe Is at basin and secure u at sill in wall. Basin replaced or repaired to design standards. No vegetation blocking opening to basin. No vegetation or root growth present. February 2005 Matntenence Component Detect Contamination and Pollution Catch Basin Cover Not in Cover Piece Loddng Mechanism Not Working Cover Difficult to Remove Ladder Ladder Rungs Unsafe Metal Grates Grate opening (If Applicable) Unsafe Trash and Debris February 2005 Damaged or Missing. Inspection See "Detention Ponds' (No. 1). Cover is missing or only partially In place. Any open catch basin requires maintenance. Mechanism cannot be opened by one maintenance person with proper tools. Bolts Into frame have less than 1/2 Inch of thread. One maintenance person cannot remove lid after applying normal lifting pressure. (Intent Is keep cover from sealing off access to maintenance.) Ladder is unsafe due to missing rungs, not securely attached to basin wall, misalignment, rust, cracks, or sharp edges. Grate with opening wider than 7/8 Inch. Trash and debris that is bloddng more than 20% of grate surface Inletting capacity. Grate missing or broken member(s) of the grate. Volume V Runoff Treatment BMPS Page 13 Maintenance Performed No pollution present. Catch basin cover is closed Mechanism opens with proper tools. Cover can be removed by one maintenance person. Ladder meets design standards and allows maintenance person safe access. Grate opening meets design standards. Grate free of trash and debris. Grate is In place and meets design standards. 4-37 1 4o. 7 Energy Dissipaters AND CURB INLETS 1 Maintenance; Components: External: Internal: Manhole/Chamber Erosion Missing or Moved Rock Wom or Damaged Post, Baffles, Side of Chamber Other Defects Inspection Only one layer of rock exists above native soil in area five square feet or larger, or any exposure of native soil. Soil erosion in or adjacent to rock pad. Dispersion Trench Pipe Accumulated sediment that exceeds Plugged with 20% of the design depth. Sediment Not Visual evidence of water discharging at Discharging concentrated points along trench (normal Water condition is a 'sheet flow' of water along Properly trench). Intent Is to prevent erosion damage. Perforations Over 1t2 of perforations in pipe are Plugged. plugged with debris and sediment Water Flows Maintenance person observes or Out Top of receives credible report of water flowing 'Distributor out during any storm less than the design Catch Basin. storm or its causing or appears likely to cause damage. Receiving Water in receiving area Is causing or has Area Over- potential of causing landslide pr Saturated Structure dissipating flow deteriorates to 1/2 of original size or any concentrated wom spot exceeding one square foot which would make structure unsound. See °Catch Basins" (No. 5). Maintenance Performed Rock pad replaced to design standards. Rock pad replaced to design standards. Pipe cleaned/flushed so that It matches design. Trench redesigned or rebuilt to standards. Perforated pipe cleaned or replaced. Facility rebuilt or redesigned to standards. No danger of landslides. Structure replaced to design standards. See 'Catch Basins' (No. 5). 4-38 Volume V Runoff Treatment BMPs February 2005 Page 14 No. 8 Typical Biofiltration Swale, �Malnfettance+ DefeatJor• 1 ;r, Component '`Probtein ;nf Y General February 2005 Sediment Accumulation on Grass Standing Water Flow spreader Constant Basellow Poor Vegetation Coverage Vegetation Excessive Shading inlet/Outlet Trash and Debris Accumulation Erosion/Scouring Inspection Sediment depth exceeds 2 Inches. When water stands in the Swale between storms and does not drain freely. Flow spreader uneven or clogged so that flows are not uniformly distributed through enlire swale width. When small quantities of water continually flow through the swale, even when it has been dry for weeks, and an eroded, muddy channel has formed in the swale bottom. When grass is sparse or bare or eroded patches occur in more than 10% of the swale bottom. When the grass becomes excessively taN (greater than 10- Inches); when nuisance weeds and other vegetation starts to take over. Grass growth Is poor because sunlight does not reach swats. Inlet/outlet areas dogged with sediment and/or debris. Trash and debris accumulated In the bio- swale. Eroded or scoured swale bottom due to flow channelizatlon, or higher flows. Page 15 Maintenance Performed Remove sediment deposits on grass treatment area of the bio-swale. When 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. Any of the following may apply: remove sediment or trash blockages. Improve grade from head to foot of swale, remove dogged check dams, add underdrains or convert to a wet blofiltration swale. Level the spreader and dean so that flows are spread evenly over entire swale width. Add a low -flow pea gravel drain the length of the swale or by -pass the baseflow around the swale. Determine why grass growth is poor and correct that condition. Re -plant with plugs of grass from the upper slope: plant in the Swale bottom at 8-inch intervals. Or re- seed into loosened, fertile soil. Mow vegetation or remove nuisance vegetation so that flow not impeded. Grass should be mowed b a height of 3 to 4 inches. Remove grass clippings. If possible, trim back over hanging limbs and remove brushy vegetation on adjacent slopes. Remove material so that there is no dogging or blockage in the inlet and outlet area. Remove trash and debris from bioswale. For ruts or bare areas Tess than 12 inches wide, repair the damaged area by Ming with crushed gravel. if bare areas are 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. Volume V Runoff Treatment BMPs 4-39 No. 15 StormfllterTu (leaf compost Hite Riga Below m- c„ rMeiritena�nce y t 1> ga Below Ground Sediment Vault Accumulation on Media. Sediment Accumulation in Vault Trash/Debris Accumulation Sediment in Drain Pipes/Clean- Outs Damaged Pipes Access Cover Damaged/Not Working Vault Structure Includes Cracks in Well, Bottom, Damage to Frame and/or Top Slab Baffles Access Ladder Damaged Below Ground Compost Media Cartridge Type Short Circuiting Note: DOE Checklist AND Manufacturer's Maintenance Manual Apply Inspection Sediment depth exceeds 0.25 inches. Sediment depth exceeds 8- Inches in first chamber. Trash and debris accumulated on compost filter bed. When drain pipes, clean -outs, become full with sediment and/or debris. Any part of the pipes that are crushed or damaged due to corrosion and/or settlement. Cover cannot be opened; one person cannot open the cover using normal lifting pressure, corrosion/deformation of cover. Cracks wider than 1/2 -inch or evidence of soil particles entering the structure through the cracks, or maintenance/inspection personnel determine that the vauft is not structurally sound. Cracks wider than 1/2 -Inch at the joint of any inlet/outlet pipe or evidence of soil particles entering through the cracks. Baffles corroding, cracking warping, and/or showing signs of failure as determined by maintenance/Inspection person. Ladder is corroded or deteriorated, not functioning properly, not securely attached to structure wall, missing rungs, cracks, and misaligned. Drawdown of water through the media takes longer than 1 hour, and/or overflow occurs frequently. Flows do not properly enter filter cartridges. Page 16 I Maintenance Performed No sediment deposits which would impede permeability of the compost media. No sediment deposits in vault bottom of first chamber. Trash and debris removed from the compost fitter bed. Sediment and debris removed. Pipe repaired and/or replaced. Cover repaired to proper working specifications or replaced. Vault replaced or repairs made so that vault meets design specifications and is structurally sound. Vault repaired so that no cracks exist wider than 1/4 -inch at the joint of the inlet/outlet pipe. Baffles repaired or replaced to specifications. Ladder replaced or repaired and meets specification, and is safe to use as determined by inspection personnel. Media cartridges replaced. Filter cartridges replaced. February 2005 Volume V Runoff Treatment BMPs 4-47 Page 17 StormFilter,Inspection and Maintenance Procedures .1 Maintenance Guidelines The primary purpose of the Stormwater Management StormFilter' is to filter out and prevent pollutants from entering our waterways. Like any effective filtration system, periodically these pollutants must be removed to restore the StormFilter to its full efficiency and effectiveness. Maintenance requirements and frequency are dependent on the pollutant load characteristics of each site. Maintenance activities may be required in the event of a chemical spill or due to excessive sediment loading from site erosion or extreme storms. it is a good practice to inspect the system after major storm events. Maintenance Procedures Although there are likely many effective maintenance options: rvre believe'thetfoUowing pro is'"efficien can be implemented using, common equipment and existing matnteiian a prut000k i l► ward itep procidure'is ie as follows: 1. Inspection Inspection of the vault interior to determine the need for maintenance. 2 Page 18 In addition to these two activities; itis iiiniit:to i the condition of the StormFilter M a pr potential damage caused by high f ows and for high sediment accumulation that may be caused by totalized erosaitnthe" r drainage area. It may be necessary-to adjiistatt'ieinspectionl maintenance schedule depending on the actual operating conditions encountered by the system. In general, inspection activities can be conducted at any time, and maintenance should occur. if warranted, in late summer to early fad when flows into the system are not likely to be present. units should be inspectetafter mapcstorms. Maintenance Frequency The primary factor controlling timing of maintenance of the StormFitter is sediment loading. A properly functioning system will remove solids from water by trapping particulates in the porous structure of the filter media inside the cartridges. The flow through the system will naturally decrease as more and more particulates are trapped. Eventually the flow through the cartridges will below enough to require replacement. It may be possible to extend the usable span of the cartridges'by removing sediment:lrogt trpstrea trapping` ya c grit r, rtY on a routine as- needed ti�sis�in orderytti• Strom e.Y: ^h!'ir "y;C N,� -v ell�.'ge= F�� rGtu'l�?3�.e .x,9mwa rp- wspeiuied ar�d harged bean �oat�te stomi ry 'influence maintenance requirements. its,oiated in areas with erosion or active y need to be inspected and maintained more with fully stabilized surface conditions. maintenance,frequency may be adjusted as additional 4y tion becomes available during the inspection ott il i ,11 it ,cievelop known problems should be moreitrequently than areas that demonstrate4no xtasJ l aiVtit n s p ec t i 1 y larlyafter�major soofrr>s: UltimstefyinspecWn ""t"� �*:r fi r. ,te.,p 'ate aptiv heduled.based o1f S E aCt 'Often 1 4 p` of s�t4 'isct3eeornrne fded' that'the.site corner -e manage St Iter and :e s Seth ent removal and cart rn e to as needed A x i ecommended unIess m rns t. has en� x one Once an understanding of site y bushed, maintenancemay:tot bu t inspection wa �I_ Ins The Prima_ c flow el r s� a •'the To. 1. Iffap surrounding vehicle and ll,the' 2. Visually,' dxcemt e. ei r,� ,,•fit. 3. Open the access portals to,the vault and allow the system vent. 4. Without entering the vault, visually inspect the insideof the unit, and note accumulations of liquids and solids. 5. Be sure to' record, the.level'ofsedinent build-up on n the floor of thevault, In the fonebay,•and on,top of.the cartridges. if flow is occurring, note the flow of water per drainage pipe. Record all observations. Digital pictures are valuable for historical documentation. 6. Close and fasten the access portals. nd n9Sify fl „Unit aind 7. Remove safety equipment. 8. If appropriate. make notes about the local drainage area relative,to ongoing,construction, erosion problems, or high loading of other materials to the system. 9. Discuss conditions that suggest,rnaintenance and make decision as to weather or not maintenance is needed. Maintenance Decision Tree The need for maintenance is typically based on resuilsoktthe3 F, mspecoon. T foNowing Mai ntenanc e D_ ecision Tree should be used as a general guide. (Other a factbii, suai as' e s< need to b e 'cosid 4t r ,y nr,,}• ry !'u ?nts, May 4. Plugged media. Page 19 a. 1. Sediment loading on the vault floor. ocu iLi 7t l s .'i'' •:t• y 'n.' .i a. If >4' Of amulatedstnent,, maintenance* required. l 2. Sediment loading on top of the cartridge. a. If >1/4" of accumulation, maintenance is required. 3. Submerged cartridges. a. if >4' of static water in the cartridge bay for more that 24 hours after end of rain event, maintenance is required. a. If pore space between media granules is absent, maintenance is required. 5. Bypass condition. if inspection is conducted during an average rain fall event and Stormfilter remains in bypass condition (water over the intemal outlet baffle wall or subrnerged- cartridges), maintenance 4 required. 6. Hazardous material release: a. If hazardous material release (automotive fluids mother) is reported, maintenance is required. 7. Pronounced scum tine. a. If pronounced scum line (say a 1/4• thick) is present above top cap, maintenance is required. 8. Calendar Lifecyde. a. If system has not been maintained for 3 years maintenance is required. 3 4) ti� 4 Filter It may occurri Replacement fam r'f Assumptions No rainfa1I •for,24 hours or more No dpssream`detention (at least not draining into StorinFilter) Structure is online Outlet pipe is clear of otistniction Construction bypass is plugged Maintenance Oependiig on "ttie coo of the parti .sys tern wlai maintenance personnel "will be required to enter the vaultto perform the maintenance. ImpoRant: tff vault+entry req red QSt ruled fiined space P4 To main 1. If applicable, set up safety equipment to protect maintenance personriel'and'pedestrians fioiii''s8e''haiards 2. Visually inspect the external condition of the unit aril take notes concerning defects/problems. r 3. Open the doors (access portals) to the vault and allow the system to vent. 4. Without entering the vault. give the inside of the unit. intruding components, a general condition inspection. 5. Make notes about the external and internal condition of the vault. Give. particular attention to recording the level of sediment build -up on the floor of the vault, in the forebay, and on top of the internal components. 6. Using appropriate equipment off the replacement cartridges (up to 150 lbs. each) and set aside. 7. Remove used cartridges from the vault using one of the followi ng'metliods: Method•1: A. This activity will require that maintenance personnel enter the vault to remove the cartridges the,under drain manifold and place them under the vault opening for lifting removal).. Unscre each filter cartridge from the underdrain cori actor. Roll the loose cartridge, on edge, to a convenient spot beneath the vault access.. Using appropriate hoisting equipment, attach a cable from the boom. crane, or tripod to the loose cartridge. Contact CONTECH Stormwater Solutions for suggested attachment devices. r"� .,7 ts..� as zx. s rrsg s r 1. 0 Continue steps a through c until all cartridges have beenr- r rerrl0ved 2: Eit"tei the vault using appropriate cbinfined space protocols. B. Unscrew the cartride cap 'P i{ a ti •sp ,r• C. Remove the cartridge hood screws (3) hood and float O. At location under structure access, tip the cartridge on its A. Page 20 side. t� all. e or load onto the hauling ,yr the D. Empty the cartridge onto the vault floor. Reassemble the empty cartridge. E. Set the empty, used cartridge aside or load onto the haulingvudx. a E Continue steps a through e until all cartridges have been AP"' '11 Remove accumulated seilimenttornthe floor of the vault arid from thefOfebaY. This can most effectively be Accompled by use of a vacuum buck. ik/Mtat 4Th,t 9. Once** ',hems are removed, assess...the condition of the .ittlArttret:ohdition of the connectors. The connectors care short sections of 2-inch schedule 40 PVC, or threaded :,schedule80 PVC that should protrude about 1 above the floor of the vault. Lightly wash down the vault interior a. 0 desired, apply a fight coating of FDA approved silicon tube to the outside of the exposed portion of the connectors. This ensures a watertight connection between the cartridge and the drainage pipe. b. Replace any damaged connectors. 10. Using,,the.vacuutn'truck koorNcrane, or tripod. lower and install the new cartridges. Once again, take care not to damage connections. Page 21 11 cit'se and fastor.t002499,:di 12. Remove safety equipment 2 6 qt.; 11. mt;,‘ t• 13. f 449-n °Phelf.5.9P3u0iftt fhateliat* ifl fcccfltpr-e, with applicable M900°11- ,i't!tice,et!4-9tetrentkt? retum the used emsay cartridges to CONTECH Stormwater Solutions. '0 A Ki.e K iirk KRICITa:....1 3 1 4 1 ;140r14.14: ettau.rk 1,1•949.7,?.-•. ■e!■f •I., ,,j .1, ..4 %I Related Maintenance Activities= Performed on an as- needed basis StoniiFilter` unit's are often j 'i' one of'manii strui:tiues in a' more comprehensive stoimvvater drainage and'treatinerit iy'stein. In order for maintenance of the Storm Filter to be successful. it is imperative that all other components be properly maintained. faa tiikshoulif be aii►ied; Van Yii• t f licial.iniportant: TW out t0 r.a 'rs area concerns may i and discharges of inapp ti Materials Dis �i 5 e•� t) 3f• :fr.; 7"i'rrr atc The accum sedime found in storitnwter'trtravent rr, t4' -9'r �9'.rAT r1 4 �i`r' s+` i and, conveyance systems must tie har and of in i s r r t it+;rr. a• p }i•1' ev accrdance with regulatory protocols. ne It is p oisible for segments to contain measurable c o ncentietio"iis`of'I 9 n nietag and organic chendcals, (such as'pesticides and petroleum products). Areas with the greatest potential for high pollutant,loading include industrial areas and heavily traveled roads. Sediments and water must be disposed of in accordance.with all applicable waste disposal regulations. When scheduling maintenance ;cb'nsideratioit Must bemade for' the disposal of solid and liquid wastes. This typically requires coordination with a local. landflijor- disposal. For liquid waste di ospl st�.:t ru5tlS a numberof optiure available including a municipal amin' ;nick decant fadlity,' local waste water' treatment plant or`o z ?s Page 22 treatment and' discharge 4 k tW tiYlaY7T'� Suppo ,4 t -arr r •'I.W f1ee�` r. .anti' glf rB v4 *•rr Drawing andispacifications, are; a 'at,ctintechsormwatercom. Site specific design support is available from our engineers. 02007 CONTECH Stormwater Solutions CONTECH Construction Products Inc. provides site solutions for the civil engineering industry. CONTEC H's portfolio indudes bridges, drainage, sanitary sewer, stormwater and earth stabilisation productsJor informationonfothei CONTECWdivision• offerings, visit contech- cpi.com or call 800.338.1122 Nothing in this catalog should be construed as an expressed warranty or an implied warranty of merchantability or fitness for any particular purpose. See the CONTECH standard quotation or acknowledgement for applicable warranties and other terms and conditions of sale. 800.925.5240 contechstormwater.com iIl',1}r?(t Or Roi)Ot "t i'*"'S, i t75 ;j�; ci. v L. r3 D F .zn.•. Petsonnel. is t +�K r'S.? L.s^ ^ct`t•14t'.7.."itt •s' ^•%""._`y'v`'-'�`J ti ;�.r.'i Location: System Size: System Type. Vault Cast- in- PtaceD Linear Catch Basin [J Manhole El Other 0 Date: Sediment Thickness in Forebay. Sediment Depth on Vault Floor: Structural Damage: Estimated Flow from Drainage Pipes (if available); Cartridges Submerged: Yes 0 No 0 Depth of Standing Water: Stormfilter Maintenance Activities (check off if done and give desuiption) Trash and Debris Removal: Minor Structural Repairs: Drainage Area Report Excessive Oil Loading: Yes No Source: Sediment Accumulation on Pavement: Yes No Source: Erosion of Landscaped Areas: Yes El No Source: Items Needing Further Work: Owners should contact the local public works department and inquire about how the department disposes of their street waste residuals. Other Comments: ONT STORMWATER SOLUTIONS. Page 23 5torn) ier ivici in itn;inCE_ 16.2 c)r[ Re iek Date: Personnel: Location: System Size: System type: Vault Cast -In -Place linear Catch Basin Manhole Other list Safety Procedures and Equipment Used: System Observations Months in Service: 011 in Forebay: Yes 0 No❑ Sediment Depth in Forebay Sediment Depth on Vault Floor Structural Damage: Drainage Area Report Excessive Oil Loading: Yes No Source: Sediment Accumulation on Pavement Yes No Source: Erosion of landscaped Areas: Yes -No Source: StormFilter Cartridge Replacement Maintenance Activities Remove Trash and Debris: Yes No Details: Replace Cartridges: Yes 0 No Details Sediment Removed: Yes 0 No Details: Quantity of Sediment Removed (estimate?): Minor Structural Repairs: Yes No Details: Residuals (debris, sediment) Disposal Method Notes: STORMWATER �O Lt1T1ONS.r< Page 24 1