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HomeMy WebLinkAbout05_Stormwater Infrastructure Inspection and Maintenance Manual (May 3, 2021) 1� THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual The University of North Carolina at Chapel Hill Stormwater Infrastructure Inspection and Maintenance Manual May 3, 2021 Version T THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual About this document: The UNC-CH Stormwater Infrastructure Inspection and Maintenance Manual is maintained by the UNC Stormwater Engineering Staff in Energy Services Water, Wastewater and Stormwater. Stormwater personnel in Energy Services, Environment, Health and Safety, and Grounds have contributed directly and indirectly to this document. The purpose of this document is to provide guidance on stormwater Best Management Practice and storm drain maintenance at The University of North Carolina at Chapel Hill. Document Revision History: Version Summary of Events Lead Staff Reviewers Dec 6, 2010 Released Draft JE SH,CK, MH, LH March 1, 2011 Final Version JE April 4, 2018 Minor Updates SCH RAB,JLS May 3,2021 Minor Updates SM/SCH Acronyms as used in the document: UNC-CH The University of North Carolina at Chapel Hill EHS UNC-CH Environment, Health and Safety Department ES UNC-CH Energy Services Department Grounds UNC-CH Grounds Department, part of UNC-CH Facilities Services PM Preventive Maintenance work order NCDEQ North Carolina Department of Environment Quality BMP Best Management Practice (In this document, BMP refers to structural stormwater management practices. NPDES National Pollutant Discharge Elimination Systems MS4 Municipal Separate Storm Sewer System May 3, 2021 Maintenance and Inspection Manual i I P a g e 1� THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual Table of Contents: 1. Introduction 2. Organizational Structure of Stormwater Staff 3. Equipment 4. Post Construction BMP Inspection and Preventative Maintenance 5. Storm Drain Inspection and Preventative Maintenance 6. Post Construction BMP Engineering Inspections 7. Storm Drain Engineering Inspection S. Stormwater Repairs Appendix A—Post Construction BMP Inspection and Preventative Maintenance Forms Appendix B-Post Construction BMP Engineering Inspections May 3, 2021 Maintenance and Inspection Manual ii P a g e 1� THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA of CHAPEL HILL Inspection and Maintenance Manual 1. Introduction The University of North Carolina at Chapel Hill (UNC-CH)was first issued National Pollutant Discharge Elimination Systems (NPDES) stormwater discharge permit by the North Carolina Department of Environment and Natural Resources (NCDENR) Division of Water Quality(DWQ) on June 1, 2007. This permit was issued as part of the Phase II Municipal Separate Storm Sewer System (MS4) program. The current permit effective date was October 10, 2018. This document addresses the relevant management measures that are included in 2018 permit Section D. Illicit Discharge Detection and Elimination Program, Section F. Post-Construction Stormwater Management for New Development and Redevelopment and Section G. Pollution Prevention and Good Housekeeping. From 2018 NPDES Permit: • • SECTION D ILLICIT DISCHARGE DETECTION AND ELIMINATION PROGRAM Management Measure Measurable Goals UNC-CH Implementation d. Detection and Utilize visual inspections of outfalls See this document's section on "Storm Elimination during dry weather. Drain Inspection and Preventative The University will inspect 1/5 of Maintenance." geographic area of community per year during dry weather conditions and, if necessary,test flows found at discharge points. SECTION F POST-CONSTRUCTION STORMWATER MANAGEMENT FOR NEW DEVELOPMENT AND CONSTRUCTION Measurable Goals UNC-CH Implementation d. Maintenance and Develop and implement a maintenance See this document's section on "Post Inspection Program and inspection program for post- Construction BMP Inspection and construction structural controls Preventative Maintenance"and on "Stormwater Repairs" SECTION G POLLUTION PREVENTION AND GOOD HOUSEKEEPING Management Measure Measurable Goals c.Visual Inspections The University shall perform visual See this document's section on "Storm inspections of the University's storm Drain Inspection and Preventative sewer system including drains, inlets,and Maintenance." outfalls.... e.Storm Sewer System The University shall perform inlet and See this document's section on "Storm Maintenance catch basin cleaning, pipe cleaning, Drain Inspection and Preventative curbside leaf removal, parking lot and Maintenance." road sweeping, and planting and mulching of erosion prone areas. g. BMP Inspection and The University shall maintain and See this document's section on "Post Maintenance implement a program for inspection, Construction BMP Inspection and operation,and maintenance of post- Preventative Maintenance"and on construction SCMs and the storm sewer "Stormwater Repairs" system (including catch basins,the conveyance system, and stormwater control measures(SCMs). Written procedures will detail inspection and maintenance requirements for the proper operation of the various types of May 3, 2021 Maintenance and Inspection Manual 11 P a g e fl THE UNIVERSITY Stormwater Infrastructure of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual SCM devices,frequency of inspections, "how-to" instructions for maintenance, and an inspection and maintenance tracking mechanism. May 3, 2021 Maintenance and Inspection Manual 2 1 P a g e 1� THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual 2. Organizational Structure of Stormwater Staff The following departments have a role in stormwater infrastructure inspection and maintenance. These roles are described throughout this document. Below is a summary of the departments, positions, and staff. Department Group or Shop Position Current Staff Person (S/3/2021) Environment Health Environmental Affairs Environmental Compliance Officer Sharon Myers and Safety Stormwater Specialist Janet Clarke Energy Services Stormwater Stormwater Manager Sally Hoyt Water Resources Engineer Jamie Smedsmo Energy Services GIS GIS Manager Carl Stearns FS—Grounds Director Steve Gooch FS—Grounds Stormwater Crew Supervisor Robert Bradley Crew Leader Eddie Canada Crew Chris Carideo Zach Dence (vacant) FS—Grounds Green Roofs& Supervisor Todd Hannon Specialty Gardens Crew Leader Geneva Green Crew Crew Krystal King FS—Grounds Zone Crews Supervisors Tom Bythell Kevin Denardo William Mitchell Mark Moon FS—Building Campus Maintenance, Supervisor Robert"Julian"Gerner Services Plumbing Shop FS—Building Campus Maintenance, Supervisor Services Masonry Shop FS—Building Asset Manager Asset Manager John Albrechtsen Services FS—Construction Construction Services, Supervisor Kenny Allen Services and Plumbing Shop Management FS= Facilities Services May 3, 2021 Maintenance and Inspection Manual 3 1 P a g e 1� THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual 3. Equipment Several departments house equipment that is available for use in Stormwater Infrastructure Inspection and Maintenance. This list contains highlights from several departments but is not comprehensive. Each Employee • Personal protective equipment Each Department • Manhole hooks • High-powered flashlights • Measuring tapes • Digital cameras • Clipboards, writing utensils Grounds • Vacuum trailer • Cameljet trailer with water tank • Regenerative Air Street Sweeper • Push Camera • Pole Camera • Confined space entry equipment • Locating equipment Building Maintenance • CCTV camera trailer Environment, Health and Safety(EHS) • Dye • Water quality testing equipment • Confined space entry equipment Energy Services • Envirosight Pole Camera May 3, 2021 Maintenance and Inspection Manual 4 P a g e T THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual 4. Post Construction BMP Inspection and Preventive Maintenance Purpose: Post-Construction BMP Inspection and Preventive Maintenance completes the actions recommended for each BMP on an ongoing basis. Frequency: • Formal Inspections and Preventive Maintenance: Underground water quality BMPs will be inspected and maintained quarterly(4 times a year).All other BMPs will be inspected and maintained yearly. • Informal Inspections and Landscape Maintenance: On-going landscape maintenance is performed in each campus area.These regular personnel provide the routine landscape maintenance for BMPs. These employees visually inspect the BMP area more frequently than once per month and after every storm event greater than 1.0 inches. Who: • Formal Inspections and Preventive Maintenance: The UNC Grounds Department Stormwater Crew conducts BMP preventative maintenance and inspection work orders. • Informal Inspections and Landscape Maintenance:The groups responsible for landscape maintenance on campus provide these services. This includes (in descending order of land managed): o Grounds Department(majority of campus) o NC Botanical Gardens o Athletics Department o UNC Hospital o Faculty Staff Recreation Association o Carolina Inn o SECU Family House o Ronald McDonald House Training: • The Grounds employees on the Stormwater Crew will have a current certificate from the NCSU Stormwater Control Measure (SCM) inspection and Maintenance Certification program. https://www.bae.ncsu.edu/workshops-conferences/stormwater-bmp/ • The NCSU SCM inspection and Maintenance Certification is available to all Grounds supervisors and crew leaders as well as any other entity on campus responsible for landscape maintenance. An on-campus training was held in January 2016. Recertification training was held January 2019. New employees have the opportunity to attend trainings elsewhere in the state. • Site-specific training will be held during construction closeout. Energy Services stormwater engineers will coordinate with the UNC-CH Construction Manager and Grounds Stormwater May 3, 2021 Maintenance and Inspection Manual 5 1 P a g e T THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual Crew. Depending on the BMP at the site,the training may be conducted by the manufacturer, contractor or sub-contractor, design engineer, or Energy Services Stormwater Engineer. • Occasional in-house stormwater training will be held for Grounds employees. Grounds will host the training. Energy Services Stormwater Engineers will be responsible for presenting the technical content or arranging an outside speaker or trainer. Resources: The BMPs will be evaluated based on the information in the following sources: Site-Specific: — UNC-CH Stormwater BMP Mapbook- Energy Services Engineering Staff maintain a Stormwater BMP "Mapbook," accessed via iPad,that contains the following information for each BMP: o A map showing the BMP footprint, access points, connected storm drains, control structures. o A GIS-based map showing the BMP drainage area. o BMP details excerpted from the as-built drawings, construction drawings, shop drawings, or manufacturer's literature. General: — NCDEQStormwater Design Manual, including the Operation and Maintenance Forms: https:Hdeq.nc.gov/about/divisions/energy-mineral-and-land- resources/stormwater/stormwater-program/stormwater-design — Training materials from the NCSU SCM Inspection and Maintenance Certification program Procedure: • Surface BMP's will be inspected visually. When needed,trash and other debris shall be removed from the BMP. • Underground BMP's will initially be inspected visually from the surface through access points. The pole camera will be used as needed to view the interior. If a confined space entry is required to inspect an issue with the BMP,the Grounds Stormwater Supervisor will ensure that the entry requirements are followed. UNC Grounds Staff conducting the inspection will remove any floating debris or blockages accessible from the surface. Follow-up cleaning with the jetter and vac will be scheduled as needed. • BMP inspection findings will be documented as described below. Follow-up: • If repair issues beyond the scope of the preventive maintenance actions are identified, Grounds staff will contact Energy Services Stormwater Engineers. Energy Services Stormwater Engineers will visit the site with the Grounds staff and determine the next steps. • If the identified next steps can be performed by UNC-CH Facilities Services and are within the available budget for stormwater maintenance,the Energy Services Stormwater Engineer or the May 3, 2021 Maintenance and Inspection Manual 6 1 P u 1� THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual Grounds Stormwater Supervisor will submit a work order for the repair to be completed by Grounds and/or other shops within Facilities Services.The work order will be closed once the problem is resolved. • If the identified next steps are outside the capabilities of UNC-CH Facilities Services but within the available budget for stormwater maintenance,the Energy Services Stormwater Engineer will be responsible for working with other department to have the work performed by outside entity. • If the identified next steps are outside the available budget for stormwater maintenance,the Energy Services Stormwater Engineer will add them to the list of stormwater deferred maintenance items for future funding. Tracking and Documentation • Energy Services Stormwater Staff is responsible maintaining updated mapping and database information for all Stormwater BMPs. • The Facilities Services Preventive Maintenance staff will incorporate BMP information into the Facilities Services Work Management database. Preventive maintenance (PM)work orders will be automatically generated for the Grounds department each month. • The Grounds Stormwater Crew and others in Facilities Services will perform preventive maintenance activities under the open PM work order. When the preventive maintenance is completed,the work order will be closed. The Facilities Services Work Management database will retain information about when the work order was issued, completed, and hours worked per BMP. • Paper copies of preventative maintenance checklist are given to Energy Services Staff by the Grounds Stormwater Crew. A stormwater engineer reviews the checklist for unusual findings. These are scanned and stored in the BMP folders on the shared server. • Paper copies are periodically forwarded to EHS for storage. • Work order information for non-preventive maintenance is also available in the Facilities Services Work Management database. • The stormwater deferred maintenance list is maintained by the Energy Services Stormwater Engineers. May 3, 2021 Maintenance and Inspection Manual 7 1 P a g e T THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual S. Storm Drain Inspection and Preventative Maintenance Purpose: Preventive maintenance and inspection of all stormwater structures (inlets,junctions, outfalls) on campus removes potential pollutants from the drainage system, identifies illicit discharges, and ensures continued function of the drainage system. Storm drain preventive maintenance includes removal of accumulated sediment,trash, and leaves or other organic material from the storm structures and pipes. Frequency: • Formal Inspections and Preventive Maintenance: Each stormwater structure (inlet,junction, outfall) will be inspected yearly. • Informal Inspections and Landscape Maintenance: On-going landscape maintenance is performed in each campus area.This includes keeping inlet grates clear of trash and leaves. Who: • Formal Inspections and Preventive Maintenance: The UNC Grounds Department Stormwater Crew conducts preventative maintenance and inspection work orders. • Informal Inspections:The groups responsible for landscape maintenance on campus provide these services. This includes (in descending order of land managed): o Grounds Department (majority of campus) o NC Botanical Gardens o Athletics Department o UNC Hospital o Faculty Staff Recreation Association o Carolina Inn o SECU Family House o Ronald McDonald House Training: The Grounds Stormwater Crew has been trained to identify illicit discharges and report any suspected illicit discharges to the EHS department. s Resources: • UNC-CH Storm Drain Mapping—Grounds accesses the stormwater mapping using iPads with cellular data. Procedure: The Grounds Stormwater Crew will • Receive Storm Drain Preventive Maintenance (PM)work orders as part of their monthly workload of work orders. May 3, 2021 Maintenance and Inspection Manual 8 1� THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual • Visit each structure on the work order and visually inspect the condition. If the structure can be easily cleaned by hand, that work will be performed during this initial inspection. Structures that require mechanical assistance will be noted. • Return to structures that need to be cleaned using mechanical equipment to complete the cleaning. This may include removing accumulated material using the vacuum or clearing pipes using a Cameljet. • Empty the contents of the vacuum truck at the designated lay down area. • File a work order to correct minor repair issues that can be corrected in-house are noted,file a work order. Examples of minor repair issues include grate repairs and minor brick work or grouting. • If repair issues of a structural nature are found, contact Energy Services Stormwater Engineers. Energy Services Stormwater Engineers will visit the site with the Grounds staff and determine the next steps. • Close-out the work order after the preventive maintenance activities are completed. • Give a copy of the completed PM form to Energy Services Stormwater Staff. Follow-up: • Grounds contacts Facilities Maintenance or The University Construction Shops with a work order for repair work if needed. • Grounds will contact Energy Services Stormwater Staff if the extent of the repair exceeds the ability of Facilities maintenance or the Construction Shops to perform the repair in house. • If the identified next steps are outside the available budget for stormwater maintenance,the Energy Services Stormwater Engineer will add them to the list of stormwater deferred maintenance items for future funding. Tracking and Documentation: • Energy Services Stormwater Staff is responsible maintaining updated mapping and database information for all Stormwater structures. • The Facilities Services Preventive Maintenance staff will incorporate the storm drain information into the Facilities Services Work Management database. Preventive maintenance (PM) work orders will be automatically generated for the Grounds department each month. • The Grounds Stormwater Crew and others in Facilities Services will perform preventive maintenance activities under the open PM work order. When the preventive maintenance is completed,the work order will be closed. The Facilities Services Work Management database will retain information about when the work order was issued, completed, and hours worked. • Paper copies of PM form are given to Energy Services Staff by the Grounds Stormwater Crew. These forms are reviewed by the Stormwater Engineer to note any changes needed to the mapping or problems with the infrastructure. Forms are scanned and stored on the server. • Paper copies of the PM forms are forwarded to EHS for storage. • The stormwater deferred maintenance list is maintained by the Energy Services Stormwater Engineers. May 3, 2021 Maintenance and Inspection Manual 9 1 P a g e T THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual 6. Post Construction BMP Engineering Inspections Purpose:The Post-Construction BMP Engineering Inspections assess structural or functional deficiencies in existing BMPs and determine appropriate follow-up actions.The inspections also identify specific preventive maintenance tasks to be performed in the BMP Preventative Maintenance Program. A third goal of the inspections is to identify potential retrofits to improve pollutant removal of the BMP. Frequency: Post-Construction BMP Engineering Inspections were conducted annually during the first 5 permit years to achieve the second and third objectives. Currently Engineering Inspections are conducted as needed when triggered by requests from the Grounds crew or others. Who: Energy Services Stormwater Engineering Staff is responsible for post-construction engineering inspections with assistance as needed from Grounds or Environment, Health and Safety(EHS) Staff. Training: The inspector conducting the inspection will be a stormwater engineer and have a current certificate from the NCSU SCM Inspection and Maintenance Certification program. Resources: The BMPs will be evaluated based on the information in the following sources: Site-Specific: — Operation and Maintenance Plan — As-built Drawings — Specifications, Drawings, and Calculations submitted for stormwater plan review and approval to UNC-CH Stormwater Staff,Town of Chapel Hill Stormwater,the State Stormwater Permitting Unit, or another regulating agency. — UNC-CH Stormwater BMP Mapbook General: — UNC-CH Stormwater Performance Criteria, Design Standards, and Procedures — NCDEQ Stormwater Design Manual, including the Operation and Maintenance Forms: https://deq.nc.gov/about/divisions/energy-mineral-and-land- resou rces/stormwater/stormwater-program/stormwater-design — Training materials from the NCSU SCM Inspection and Maintenance Certification program — Other NCSU Stormwater Engineering Group publications: — https:Hstormwater.bae.ncsu.edu/resources/ Procedures: • Surface BMP's will be inspected visually. • Underground BMP's will initially be inspected visually from the surface through access points or with the aid of camera equipment. If a confined space entry is required to complete an inspection,the inspector will work with the Grounds Stormwater Supervisor for proper entry May 3, 2021 Maintenance and Inspection Manual 10 1 P a g e T THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual procedures.The inspector will also coordinate with UNC Grounds Staff to remove debris and standing water from underground BMP's prior to making a confined space entry. • Permeable pavement inspections will include a site visit during a rain event to assess function. • Bioretention beds will be visually inspected. In addition, the inspector will dig into the filtration media to assess the accumulation of sediment on the surface,the condition of the mulch, and the condition of the bioretention soil media. • BMP inspection findings will be documented as described below. Inspection Follow-up: Follow-up actions are classified into five groups based on the severity of the issue: • "None"- o "None—BMP Ok" No follow-up actions are required because BMP is in acceptable condition. • "Revisit" -This BMP needs to be revisited more frequently to observe a potential problem. • "Call/E-mail" - Minor maintenance work is needed and can be performed by UNC Staff • "Work Order"—Repairs to the BMP are needed. A work order is placed with UNC Grounds or Maintenance Staff • "Consultant"—Additional Expertise is needed to evaluate, design, or construct a remedy. Inspection Tracking and Documentation: • FORM: Findings and observations from each Post-construction BMP Engineering inspection will be documented using the forms found in Appendix A. These forms will be stored electronically on the shared stormwater server by site, in the subfolder titled "inspections". Inspection document file names will include the date. For example: \\facdraw\gis\Stormwater\1 -Sites-Projects\Rizzo\inspections Inspection forms are updated as needed. Current versions can be found here: \\facdraw.facilities.unc.edu\gis\Stormwater\BMP\0-BMP Inspection Forms\Engineer • PHOTOS: Supporting photographs from the inspection will also be stored electronically by site on the shared stormwater server, in the subfolders titled "photos". Photograph file names will include the date. For example:\\facdraw\gis\Stormwater\1 -Sites-Projects\Rizzo\photos • TABLE: Inspections are recorded in a table with the following fields: Date Visited, Inspection Type, StormlD, BMP Type, Inspector, BMP Location, Form used, and Follow-up action.This table is currently an Excel Spreadsheet. In the future,this spreadsheet will be joined with the stormwater geodatabase, making the values visible when the attributes of a BMP Point are viewed in GIS. May 3, 2021 Maintenance and Inspection Manual 111 P a g e 1� THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual 7. Storm Drain Engineering Inspections Purpose:Storm Drain Engineering Inspections are meant to assess the functional and structural condition of storm drain infrastructure, including pipes and structures such as inlets,junctions, and outfalls. Frequency: • The University's Master Plan Consultant, RK&K Engineers recommends that trunklines (pipes 48" in diameter or larger) be inspected visually on annual basis, with a written report every five years. However,that is not feasible given current funding levels. That schedule will be implemented when resources allow. Currently, inspections are conducted when triggered by a request from the Grounds crew or a drainage complaint. • The frequency of inspection of pipes smaller than 48" in diameter has not been determined. • No separate routine engineering inspections are currently planned for structures (inlets, junctions, and outfalls) as these are inspected as part of the pipe inspections, annual preventive maintenance by Grounds and the Illicit Discharge Detection work by EHS. Who: Energy Services Stormwater Engineers will take the lead on inspections and will make decisions regarding whether work will be done in house or let out for contract. Resources: • UNC-CH Stormwater Mapbook • UNC-CH Stormwater GIS Procedure: • Visual inspections without confined space entry are the preferred method of inspection. Pole cameras or CCTV equipment may be used to record conditions. • If confined space entries are necessary, Energy Services will coordinate with EHS. Contractors whose work requires confined space entry must follow the applicable policies and regulations. Videos or photographs will be labeled and saved. • Collected data will be reviewed and areas of concerns will be identified and summarized. Follow-up: • Follow-up actions will be taken as described in Stormwater Repairs. Inspection Tracking and Documentation: • All inspection work will use the UNC-CH StormlD (unique identifiers for each stormwater structure)to identify the inlets,junctions, and outfalls. • Energy Services will be responsible for reporting and tracking any inspections performed May 3, 2021 Maintenance and Inspection Manual 12 1 P a g e 1� THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA of CHAPEL HILL Inspection and Maintenance Manual • A digital copy of video taken during an inspection will be kept,when available, by Energy Services. • Videos are linked to the GIS database. May 3, 2021 Maintenance and Inspection Manual 13 1 P a g e 1� THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual 8. Stormwater Repairs Purpose: Perform repairs to BMPs and the storm drain infrastructure beyond the preventive maintenance activities. Frequency: As needed. Who: Some repairs will be performed in-house by Grounds Services, Building Services, or Construction Services. If specialized skills or equipment are required, repairs may be performed by an outside contractor. Repairs requiring design work may be designed by Energy Services Stormwater Engineers, Design Services, or an outside engineering consultant. Training: NA Resources: NA Procedure: • Repair needs will be identified as part of the Post-Construction Stormwater BMP Engineering Inspections,the Post-Construction Stormwater Preventive Maintenance work, Storm Drain Preventive Maintenance Work, Storm Drain Engineering inspections or other sources. Repair work may be initiated directly or may reside on the Deferred Maintenance List until funding is available. • All BMP repair needs and significant storm drain infrastructure repair needs will be communicated to the Energy Services Stormwater Engineers before commencing. • Energy Services Stormwater Engineers will visit the site during the repair to serve as a technical resource and document the changes. Follow-up: • Open work orders • Deferred maintenance list Tracking and Documentation: • BMP Repair work performed by Facilities Services staff will be conducted under a work order or suborder specific to that BMP. • Work orders involving stormwater BMPs should contain the words "Stormwater BMP Repair" in the text and should include the BMP StormlD,the unique ID number listed as "serial number" in the Facilities Services Work Management software database. • Work orders will remain open until the work is complete, serving as a tracking mechanism for work to be completed. May 3, 2021 Maintenance and Inspection Manual 14 1 P a g e 1� THE UNIVERSITY Stormwater Infrastructure I of NORTH CAROLINA at CHAPEL HILL Inspection and Maintenance Manual • The Stormwater GIS geodatabase will be updated as needed following repairs by the Energy Services Stormwater Staff. • The stormwater deferred maintenance list is maintained by the Energy Services Stormwater Engineers. • Any design documents or drawings will be archived in the University Plan Room. • Any design documents, drawings, calculations,specifications, correspondence regarding changes, permitting information, or other items of future use will be forwarded to the Energy Services Stormwater Engineers for inclusion in the stormwater files. May 3, 2021 Maintenance and Inspection Manual 15 1 P a g e Appendix A Inspection Checklist for Hydrodynamic Separators, Vaults, Pipes, Pipes in Stone, Proprietary Storage, Stone Beds, Ponds, Wetlands, Bioretention and Sand Filters Date: BMP Serial Number: BMP Type: Brand: 1. Is water present in/on the surface of the BMP? (Circle one) YES NO 2. Is sediment present in the BMP? (Circle one) YES NO 3. Was sediment removed from the BMP? (Circle one) YES NO 4. Estimated depth of material in BMP: feet 5. Is trash present in the BMP? (Circle one) YES NO 6. Are leaves, lawn clippings, or other plant material present in the BMP? YES NO 7. Problems accessing the BMP? (Circle one) YES NO 8. If Yes, what is the problem? 9. Visible blockages of inlet or outlet pipes? (Circle one) YES NO 10. If Yes, was blockage removed? (Circle one) YES NO 11. Is the BMP in working order? (Circle one) YES NO 12. If No, what is the problem? 13. If No, was the problem fixed? (Circle one) YES NO If a problem cannot be fixed, create work order and notify the Stormwater Engineer at 843-8800 UNC Stormwater Grounds Inspection A 5/28/2010 Version Catch Basin Insert Inspection Checklist Date: BMP Serial Number: Brand: 1. Is sediment present in the BMP? (Circle one) YES NO 2. Was sediment removed from the BMP? (Circle one) YES NO 3. Is trash present in the BMP? (Circle one) YES NO 4. Are leaves, lawn clippings, or other plant material present in the BMP? YES NO 5. Problems accessing the BMP? (Circle one) YES NO 6. If Yes, what is the problem? 7. Is the BMP in working order? (Circle one) YES NO 8. If No, what is the problem? 9. If No, was the problem fixed? (Circle one) YES NO If a problem cannot be fixed, create work order and notify the Stormwater Engineer at 843-8800 UNC Stormwater Grounds Inspection B 5/28/2010 Version Permeable Pavement Inspection Checklist Date: BMP Serial Number: Brand: 1. Is sediment present on the surface? (Circle one) YES NO 2. What is the sediment source? 3. Was sediment removed from the BMP? (Circle one) YES NO 4. Is there standing water on the surface of the BMP? (Circle one) YES NO 5. Are weeds growing through the pavement? (Circle one) YES NO 6. Is the BMP in working order? (Circle one) YES NO 7. If No, what is the problem? 8. If No, was the problem fixed? (Circle one) YES NO If a problem cannot be fixed, create work order and notify the Stormwater Engineer at 843-8800 UNC Stormwater Grounds Inspection C 5/28/2010 Version Level Spreader/Swale Inspection Checklist Date: BMP Serial Number: BMP Type: Brand: 1. Is erosion evident around the level spreader/swale? (Circle one) YES NO 2. Was the eroded area stabilized? (Circle one) YES NO 3. Was sediment removed from the BMP? (Circle one) YES NO 4. Is there enough vegetation in/around the BMP? (Circle one) YES NO 5. Is there standing water on the surface around the BMP? (Circle one) YES NO 6. If the BMP is a level spreader, is the ground downstream level? (Circle one) YES NO 7. Is the BMP in working order? (Circle one) YES NO 8. If No, what is the problem? 9. If No, was the problem fixed? (Circle one) YES NO If a problem cannot be fixed, create work order and notify the Stormwater Engineer at 843-8800 UNC Stormwater Grounds Inspection D 5/28/2010 Version Appendix B Engineering Inspection Checklist for Bioretention Date: StormID: BMP Serial Number: BMP Type: Brand: Accessibility 1. Can the vacuum truck access the BMP? YES NO 2. Explain any other accessibility issue: BMP Parts Outlet Structure 1. Does the BMP have an outlet structure (riser and pipe, etc)? YES NO 2. List the nature and location of any blockage or structural damage to the pipe or riser, and photograph each problem. Outfall Channel 1. Does the BMP have an outfall channel? YES NO 2. List the nature and location of any erosion, rip rap issues, sediment deposits, woody growth, or other problems, and photograph each problem. Underdrains 1. Are underdrains present in the BMP? YES NO 2. Are the cleanout caps accessible? YES NO 3. List the nature and location of any clogging or structural issues with the underdrains, and photograph each problem. UNC Stormwater Engineering Inspection Checklist—Bioretention 1 May 28, 2010 Version Vegetation/Soil 1. List the nature and location of any overgrowth, dead or dying vegetation, or invasive Species present in the BMP, and photograph each problem. 2. List the nature and location of any sediment accumulation> 1", mulch problems, or oil/chemical accumulation on the soil, and photograph each problem. Inlet Pipe List the nature and location of any clogging, sediment accumulation, or structural issues in the inlet pipe, and photograph each problem. Pretreatment Record the type(s) of pretreatment present (e.g. grassed swale, forebay) and note any problems such as clogging, sediment accumulation, erosion, or weed growth present. Photograph any problems recorded. Overflow List the nature and location of any erosion,bare spots, or unauthorized plants in the overflow spillway, and photograph each problem. UNC Stormwater Engineering Inspection Checklist—Bioretention 2 May 28, 2010 Version Soil Record any sediment or chemical accumulation, water ponding after 2 days, or mulch washout in the BMP. Perform a soil test if needed, and photograph any problems that are recorded. Drainage Area 1. Is sediment present on the surface of the BMP? YES NO 2. What is the sediment source? 3. Was sediment removed from the BMP? YES NO 4. Is erosion occurring around the BMP? YES NO 5. Describe any other problems occurring as a result of the BMP's drainage area: Functionality If the BMP is not functioning properly(not drawing down correctly, etc.) explain the issue(s) and take photographs where necessary. Maintenance Actions Follow Up Actions Check the appropriate action(s)that will be taken. Phone Call Work Order Request to Consult Engineer Revisit on a basis UNC Stormwater Engineering Inspection Checklist—Bioretention 3 May 28, 2010 Version UNC Stormwater Engineering Inspection Checklist—Bioretention 4 May 28, 2010 Version Engineering Inspection Checklist for Catch Basin Inserts Date: StormID: BMP Serial Number: BMP Type: Brand: Accessibility 1. Can the inlet grate be removed? YES NO 2. Explain any other accessibility issue: BMP Parts Skimmer Box 1. Are the screens in the skimmer box clogged? YES NO 2. Does the skimmer box need to be cleaned out? YES NO 3. Explain any other problems with the skimmer box: Absorbent Material 1. Does the absorbent material need to be replaced? YES NO 2. Explain any other problems with the absorbent material: UNC Stormwater Engineering Inspection— Catch Basin Insert 1 May 28, 2010 Version Drainage Area 1. Is sediment present in the BMP? YES NO 2. Was sediment removed from the BMP? YES NO 3. Is trash present in the BMP? YES NO 4. Is plant material present in the BMP? YES NO 5. Describe any other problems occurring as a result of the BMP's drainage area: Functionality If the BMP is not functioning properly, explain the issue(s) and take photographs where necessary. Maintenance Actions Follow Up Actions Check the appropriate action(s)that will be taken. Phone Call Work Order Request to Consult Engineer Revisit on a basis UNC Stormwater Engineering Inspection— Catch Basin Insert 2 May 28, 2010 Version Engineering Inspection Checklist for Green Roofs Date: BMP Serial Number: BMP Type: Brand: BMP Parts Ve_etg ation Record and photograph any areas where green roof vegetation is dead or dying, or is not sufficiently covering the roof. Media Take a soil sample of the green roof media. If clogging is present, record this and photograph the soil sample and any evidence of clogging present on the green roof surface. Overflow Drains Record and photograph any problems with the overflow drains, including clogging or structural issues. Also record whether or not they are present. Underdrains Record and photograph any problems with the underdrains. If cleanouts are present, inspect those as well, and record any issues. UNC Stormwater Engineering Inspection Green Roof 1 May 28, 2010 Version Outlet Pipe If the outlet pipe is visible,record and photograph any problems with the outlet pipe, including clogging or structural issues. Functionality Describe the nature and location of any water ponding on the green roof. Walk the area inside the building directly underneath the green roof to check for stains or other signs of leaking. Record and photograph any problems that are found. Ask the building manager if there have been any complaints regarding the green roof (e.g. leaking or flooding). Record the complaints. Follow Up Actions Check the appropriate action(s)that will be taken. Phone Call Work Order Request to Consult Engineer Revisit on a basis UNC Stormwater Engineering Inspection Green Roof 2 May 28, 2010 Version Engineering Inspection Checklist for Hydrodynamic Separators Date: Storm ID: BMP Serial Number: BMP Type: Brand: Inspection by: Accessibility 1. Can the lid to the BMP be removed? YES NO 2. Is the BMP lid marked correctly? YES NO 3. Can the vacuum truck access the BMP? YES NO 4. Are the steps or ladder inside the BMP accessible?YES NO 5. Are the steps or ladder inside the BMP secure? YES NO 6. Explain any other accessibility issue: BMP Parts Manhole Structure Describe the nature and location of any cracking,spalling,joint failure,leaking,or settling visible within the BMP,and photograph each problem. Inlet Pipe 1. Is the inlet pipe visible? YES NO 2. List the nature and location of any blockage or structural damage to the pipe,and photograph each problem. Outlet Pipe 1. Is the outlet pipe visible? YES NO 2. List the nature and location of any blockage or structural damage to the pipe,and photograph each problem. UNC Stormwater Engineering Inspection—Hydrodynamic Separator 1 512812010 Version Proprietary System List the nature and location of any problems with the BMP's proprietary system,and photograph each problem. Functionality If the BMP is not functioning properly,explain the issue(s)and take photographs where necessary. Maintenance Actions Follow Up Actions Check the appropriate action(s)that will be taken. Phone Call Work Order Request to Consult Engineer Revisit on a basis UNC Stormwater Engineering Inspection—Hydrodynamic Separator 2 512812010 Version Engineering Inspection Checklist for Level Spreader/Vegetated Filter Strip Date: StormID: BMP Serial Number: BMP Type: Brand: Inspection by: Accessibility Explain any accessibility issues: BMP Parts Inlet Pipe(s) Describe the nature and location of any problems (structural, clogging, etc.) with the inlet pipe(s) and photograph the problems. Blind Swale Describe the nature and location of any bare soil, erosion, vegetation problems or obstructions within the swale, and photograph each problem. Level Spreader Describe the nature and location of any problems (structural, vegetation, settlement, etc.) and photograph each problem. UNC Stormwater Engineering Inspection—Swale 1 512812010 Version Underdrains If underdrains are present in the swale, describe the nature and location of any breaks, daylighting, or clogging, and photograph each problem. Filter Strip Describe the nature and location of any bare soil, erosion, vegetation problems or obstructions within the swale, and photograph each problem Drainage Area 1. Is sediment present in the Swale? YES NO 2. Is trash or debris present in the Swale? YES NO 3. Is standing water present in the swale? YES NO 4. Describe any other problems occurring as a result of the swale's area: Functionality If the BMP is not functioning properly(not dewatering, water running off, etc.), explain the issue(s) and take photographs where necessary. Follow Up Actions Check the appropriate action(s) that will be taken. Phone Call Work Order Request to UNC Stormwater Engineering Inspection—Swale 2 512812010 Version Consult Engineer Revisit on a basis UNC Stormwater Engineering Inspection—Swale 3 512812010 Version Engineering Inspection Checklist for Permeable Pavement Date: StormID: BMP Serial Number: BMP Type: Brand: Accessibility 1. Can the pavement be swept by the vacuum truck? YES NO 2. Explain any other accessibility issue: BMP Parts Permeable Pavement Surface Describe the nature and location of any rutting, settling, deterioration, weed growth or damage to the surface of the pavement, and photograph each problem. Control Structure 1. Can the control structure lid be removed? YES NO 2. Is the control structure lid correctly marked? YES NO 3. Describe the nature and location of any cracking, spalling,joint failure, leaking, or settling visible within the control structure, and photograph each problem. UNC Stormwater Engineering Inspection—Permeable Pavement 1 512812010 Version Outlet Pipe 1. Is the outlet pipe visible? YES NO 2. List the nature and location of any blockage or structural damage to the pipe, and photograph each problem. Drainage Area 1. Is sediment present on the surface of the BMP? YES NO 2. What is the sediment source? 3. Was sediment removed from the BMP? YES NO 4. Is erosion occurring around the permeable pavement? YES NO 5. Describe any other problems occurring as a result of the permeable pavement's drainage area: Functionality If the BMP is not functioning properly(not dewatering, water running off, etc.), explain the issue(s) and take photographs where necessary. Maintenance Actions UNC Stormwater Engineering Inspection—Permeable Pavement 2 512812010 Version Follow Up Actions Check the appropriate action(s)that will be taken. Phone Call Work Order Request to Consult Engineer Revisit on a basis UNC Stormwater Engineering Inspection—Permeable Pavement 3 512812010 Version Engineering Inspection Checklist for Sand Filters Date: StormlD BMP Serial Number: BMP Type: Brand: Accessibility 1. Can the sand filter be accessed by the vacuum truck? YES NO 2. Can the manhole lid be removed? YES NO 3. Is the manhole lid marked correctly? YES NO 4. Are the steps or ladder inside the manhole accessible? YES NO 5. Are the steps or ladder inside the manhole secure? YES NO 6. Explain any other accessibility issue: BMP Parts Inlet Pipe 1. Is the inlet pipe visible? YES NO 2. List the nature and location of any blockage or structural damage to the pipe, and photograph each problem. Flow Diversion Structure 1. Is sediment present in the flow diversion structure? YES NO 2. Describe the nature and location of any clogging or structural issues within the flow diversion structure, and photograph each problem. Sediment Chamber 1. Is sediment present in the chamber? YES NO 2. Estimated depth of sediment: feet 3. Describe any problems with the sediment chamber. UNC Stormwater Engineering Inspection—Sand Filter 1 512812010 Filter Bed and Underdrains 1. Is water present on the surface of the BMP? YES NO 2. Are the cleanout caps accessible? YES NO 3. Is the BMP clogged? YES NO 4. Describe the nature and location of any structural issues, including cracks,joint failure, or settlement, and photograph each problem. Outlet Pipe 1. Is the inlet pipe visible? YES NO 2. List the nature and location of any blockage or structural damage to the pipe, and photograph each problem. Functionality If the BMP is not functioning properly, explain the issue(s) and take photographs where necessary. Maintenance Actions Follow Up Actions Check the appropriate action(s)that will be taken. Phone Call Work Order Request to Consult Engineer Revisit on a basis UNC Stormwater Engineering Inspection—Sand Filter 2 512812010 Engineering Inspection Checklist for Swales Date: StormID: BMP Serial Number: BMP Type: Brand: Accessibility Explain any accessibility issues: BMP Parts Swale Lenath Describe the nature and location of any bare soil,erosion,vegetation problems or obstructions within the swale,and photograph each problem. Culverts 1. Does the swale flow through culverts at any point?YES NO 2. Describe the nature and location of any blockages,corrosion,leaks,joint issues,or spalling present in the culvert(s),and photograph each problem. Underdrains If underdrains are present in the swale,describe the nature and location of any breaks, daylighting,or clogging,and photograph each problem. Check Dams 1. Are check dams present in the swale? YES NO 2. Is debris present at any of the check dams? YES NO 3. Is sediment built up at any of the check dams? YES NO 4. Describe the location and condition of any undermining,erosion,or structural issues happening to the check dams,and photograph each problem. UNC Stormwater Engineering Inspection—Swale 1 512812010 Version Drainage Area 1. Is sediment present in the swale? YES NO 2. Is trash or debris present in the swale? YES NO 3. Is standing water present in the swale? YES NO 4. Describe any other problems occurring as a result of the swale's area: Functionality If the BMP is not functioning properly(not dewatering,water running off,etc.),explain the issue(s)and take photographs where necessary. Maintenance Actions Follow Up Actions Check the appropriate action(s)that will be taken. Phone Call Work Order Request to Consult Engineer Revisit on a basis UNC Stormwater Engineering Inspection—Swale 2 512812010 Version Engineering Inspection Checklist for Vaults Date: StormID: BMP Serial Number: BMP Type: Brand: Accessibility 1. Can the vault manhole lid be removed? YES NO 2. Is the vault manhole lid marked correctly? YES NO 3. Can the vacuum truck access the vault? YES NO 4. Are the steps or ladder inside the vault accessible? YES NO 5. Are the steps or ladder inside the vault secure? YES NO 6. Explain any other accessibility issue: BMP Parts Vault Structure Describe the nature and location of any cracking, spalling,joint failure, leaking, or settling visible within the vault, and photograph each problem. Inlet Pipe 1. Is the inlet pipe visible? YES NO 2. List the nature and location of any blockage or structural damage to the pipe, and photograph each problem. Outlet Pipe 1. Is the outlet pipe visible? YES NO 2. List the nature and location of any blockage or structural damage to the pipe, and photograph each problem. UNC Stormwater Engineering Inspection Vault 1 512812010 Functionality If the BMP is not functioning properly, explain the issue(s) and take photographs where necessary. Maintenance Actions Follow Up Actions Check the appropriate action(s)that will be taken. Phone Call Work Order Request to Consult Engineer Revisit on a basis UNC Stormwater Engineering Inspection Vault 2 512812010 Engineering Inspection Checklist for Wet Detention Basins Date: StormID: BMP Serial Number: BMP Type: Brand: Accessibility Explain any accessibility issues: BMP Parts Inlet Pipe(s) Describe the nature and location of any problems (structural, clogging, etc.) with the inlet pipe(s) and photograph the problems. Outlet Structure Describe the nature and location of any problems (structural, clogging, etc.) with the outlet structure and photograph the problems. Overflow device Describe the nature and location of any problems (structural, clogging, etc.) with the overflow device and photograph the problems. Drainage Area 1. Is sediment present in the basin? YES NO 2. Is trash or debris present in the basin? YES NO 3. Is standing water present in the basin? YES NO 4. Describe any other problems occurring as a result of the basin's drainage area: Functionality If the BMP is not functioning properly(not drawing down after a storm, not detaining water, etc.), explain the issue(s) and take photographs where necessary. Follow Up Actions Check the appropriate action(s)that will be taken. Phone Call Work Order Request to Consult Engineer Revisit on a basis