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HomeMy WebLinkAboutO&M Manual Stormwater Operation and Maintenance Manual For The Corner 116th Street & Rangeline Road Carmel, IN Prepared For: Kite Realty Group 30 S. Meridian Suite 1100 Indianapolis, In 46240 Prepared By: American Structurepoint, Inc. 9025 River Road, Suite 200 Indianapolis, Indiana 46240 (317) 547-5580 Submitted by: Nathan Winslow, PE Josh Rodgers, PE Submitted: February 15th, 2021 I AFFIRM UNDER PENALTY OF PERJURY THAT I HAVE TAKEN REASONABLE CARE TO REDACT EACH SOCIAL SECURITY NUMBER FROM THIS DOCUMENT UNLESS OTHERWISE REQUIRED BY LAW -Josh Rodgers TABLE OF CONTENTS OWNER ACKNOWLEDGMENT AGREEMENT (“AGREEMENT”) SECTION I Owner Information SECTION II Site Information SECTION III Storm Structure Maintenance SECTION IV Conveyance Maintenance (storm sewer) SECTION V Conveyance Maintenance (swales) SECTION VI Aquaswirl XC-8 SECTION VII Inlet Catch Basin Sumps SECTION VIII Inspection and Maintenance Schedule SECTION IX Utility Plan and Details SECTION X Inspection Checklist Forms Operation & Maintenance Manual For The Corner 116th Street & Rangeline Road Carmel, IN BMP OWNER NAME Kite Realty Group 30 S. Meridian Suite 1100 Indianapolis, In 46240 Representative: Tony Halsey Business Phone: Phone Number E-mail: Address GENERAL INFORMATION The purpose of water quality Best Management Practices is to filter the first flush of rainwater before it enters the downstream lakes and streams. Through the use of these Best Management Practices, the sediment and pollutant load in stormwater runoff is reduced, and in many cases the quantity of stormwater water runoff generated is also reduced. The use of Best Management Practices also helps to reduce hydrocarbons, trash and debris from entering waterways. OWNER RESPONSIBILITY The BMP Owner shall be responsible for all maintenance and costs associated with the proposed BMPs. In addition, it is the owner’s responsibility to perform and/or pay for inspections and maintenance as recommended below. RIGHT OF ENTRY The City of Carmel representatives have the right to enter the property to inspect and, if required, maintain the BMPs at any time. ANNUAL INSPECTION REPORTS Annual inspection reports shall be submitted to the City of Carmel for each BMP. The first report is due one year after construction is completed, with subsequent reports due each year within the same month of the initial report. If there are any deficiencies found during the inspection, these should be addressed. If the inspection report is not received within the month it is due, if there are deficiencies which were not included in the report, or if any deficiencies included in the report are not addressed in a timely manner, the BMP owner faces enforcement action from the City of Carmel. Owner Acknowledgement Agreement (“Agreement”) For good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the undersigned owner (“Owner”) hereby submits this Operation and Maintenance Manual (“Manual”) to the City of Carmel, Indiana (“City”) as written acknowledgement of Owner’s warranty and agreement to institute, maintain, and follow the water quality Best Management Practices (“BMPs”) listed below, and to follow and abide by the inspection schedule and maintenance activities listed in this Manual. The Owner also hereby agrees to provide, at Owner’s cost, all additional maintenance, repair and/or replacement services reasonably necessary to maintain the function and longevity of the BMPs from and including the date this Agreement is executed by Owner to and including the date on which a new Agreement is filed with the County by another party who assumes all of the obligations and responsibilities of Owner as set forth herein. BMPs: Aqua-Swirl, Catch Basin Inserts __________________________ ________________________ Owner Signature Date __________________________ ________________________ Printed Name Company STATE OF ________________ ) ) SS: COUNTY OF ______________ ) BEFORE ME, the undersigned a Notary Public in and for said County and State, personally appeared __________________________________, Owner, subscribed and sworn before this ________ day of ___________________________, __________. _______________________________ County of Residence _______________________________ Commission Expiration Date _______________________________ _______________________________ Signature Printed Name SECTION I OWNER INFORMATION OWNER INFORMATION: Kite Realty Group 30 S. Meridian Suite 1100 Indianapolis, In 46240 Representative: Tony Halsey Business Phone: Phone Number E-mail: Address OWNER RESPONSIBILITY: The Owner is responsible for all maintenance, including cost, associated with inspecting and maintaining the infrastructure included within this manual. SECTION II SITE INFORMATION The site contains 2 Best Management Practice (BMP) for the purpose of sediment removal. These BMP’s are an Aqua-Swirl and Catch Basin Inserts. The Catch Basin inserts are located at all storm sewer inlets and the Aqua-Swirl is located downstream of the storm network system prior to the storm sewer outlet. See the attached site exhibits for BMP and storm sewer locations. The City of Carmel will require annual inspection reports of the water quality BMPs. SECTION III STORM STRUCTURE MAINTENANCE Storm structures are set at storm sewer pipe connections. Unless you have OSHA approved training and equipment, never enter a manhole. Inspection All inlet castings should be inspected monthly and after each rainfall event. More frequent inspections should be performed in areas where there is higher potential for trash or litter (e.g. retail establishments) and during the fall when leaves are present on the ground. Check the frame and lid for cracks and wear, such as rocking lids or lids moved by traffic. Storm structures and the surrounding areas should be inspected annually for pollutants such as leaks from dumpsters, minor spills, and oil dumping. Take action to have the pollutant source removed. Cleaning Clean structures when there is a blockage of a water flow path or when sediment depth reaches 6”. Cleaning should be performed in a way that ensures removed sediment and water is not discharged back into the storm sewer. Safety Work inside underground structures requires special OSHA-required confined space equipment and procedures. The most practical option may be to contract with a sewer cleaning contractor. Materials Handling Disposal of waste from maintenance of drainage facilities shall be conducted in accordance with federal, state, and local regulations. Removed sediment must be disposed in the garbage as solid waste. Water should be disposed of in a sanitary sewer after oils are removed using oil absorbent materials or other mechanical means. Used oil absorbents should be recycled or disposed according to the manufacturer's instructions. Repairs Repair all security and access features so they are fully functional. This includes locking lids, covers, and ladder rungs. Replace broken parts or lids that rock or are moved by traffic. Storm Sewer Pipes Operation, Maintenance, and Management Inspection Checklist for BMP Owners Project: _________________________________Owner Change since last inspection? Y N Owner Name, Address, Phone: ___________________________________________________________ Number: _____________________________________________________________________________ Location: _____________________________________________________________________________ Site Status _________________________________ Date: ________________________ Time: ________________________ Inspector: ____________________________________________________________________________ Maintenance Item Satisfactory/ Unsatisfactory Comments Storm sewer pipes (Inspect annually and after major storms) 1. Trash/Debris obstructing inflow Affected Pipes: 2. Silt/Sediment accumulation Affected Pipes: 3. Other (describe) Additional Comments: _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ Actions to be taken: Timeframe: Storm Sewer Structure Operation, Maintenance, and Management Inspection Checklist for BMP Owners Project: _________________________________Owner Change since last inspection? Y N Owner Name, Address, Phone: ___________________________________________________________ Number: _____________________________________________________________________________ Location: _____________________________________________________________________________ Site Status _________________________________ Date: ________________________ Time: ________________________ Inspector: ____________________________________________________________________________ Maintenance Item Satisfactory/ Unsatisfactory Comments Storm Casting and Grate (Inspect monthly and after major storms) 1. Trash/Debris obstructing inflow Affected Structures: 2. Silt/Sediment accumulation Affected Pipes: 3. Other (describe) Structure Sump (Inspect annually and after major storms) 1. Sediment/Debris in sump Affected Structures: 2. Other (describe) Headwall Structures (Inspect annually and after major storms) 1. Vegetation around headwall 2. Erosion around headwall 3. Animal burrows 4. Headwall clear of obstructions 5. Sediment Accumulation Affected Structures: 6. Other (describe) Additional Comments: _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ Actions to be taken: Timeframe: SECTION IV CONVEYANCE MAINTENANCE (STORM SEWER) Storm sewer pipes convey stormwater. Pipes are built from many materials and are sometimes perforated to allow stormwater to infiltrate into the ground. Storm pipes are cleaned to remove sediment or blockages when problems are identified. Storm pipes must be clear of obstructions and breaks to prevent localized flooding. Inspection Pipes are difficult to inspect requiring special equipment and training. Usually, if a problem occurs the owner needs to call a sewer or plumbing contractor to inspect, repair or clean pipelines. Cleaning Clean pipes when sediment depth is greater than ¼ of pipe diameter, with a maximum sediment depth of 6”. When cleaning a pipe, minimize sediment and debris discharges from pipes to the storm sewer. Install downstream debris traps (where applicable) before cleaning and then remove material. Generally, use mechanical methods to remove root obstructions from inside storm sewer pipes. Do not put root-dissolving chemicals in storm sewer pipes. If there is a problem, remove the vegetation over the line. Safety Work inside underground structures requires special OSHA-required confined space equipment and procedures. The most practical option may be to contract with a sewer--cleaning contractor. Materials Handling Sediment and debris from pipes should be disposed in the garbage as solid waste. Pick out any rocks first. Repairs Repair or replace pipes when a dent or break closes more than 20 percent of the pipe diameter. Repair or replace pipes damaged by deterioration. SECTION V CONVEYANCE MAINTENANCE (SWALES) Swales are manmade open channels that carry only stormwater. Ditches are often maintained for drainage to prevent localized flooding by draining stormwater. Maintenance includes removing sediment, debris and overgrown vegetation. Inspection Inspect swales during routine site maintenance or at least once per year. Cleaning Clear inlets and outlets to prevent blockage. Remove litter when mowing or litter accumulation that exceeds one cubic foot. Use rake and shovel to hand remove sediment accumulations greater than 2” in depth that cover grass areas, avoiding vegetation removal. A good time to clean swales is during the growing season, when it easiest to reestablish vegetation. This is generally April through June and September through October. Vegetation Management Mow to keep grass at the optimum height (6”). Mow to no less than 4” and a minimum of four cuttings per year. Remove clippings from the treatment area in the base of the swale. Preserve healthy vegetation or reestablish vegetation where needed. Seed bare spots. Use cover BMPs on bare soils. BMPs include hydroseeding or mulches. Trees and shrubbery should be allowed to grow unless they interfere with the facility function or maintenance activities. Repairs Often swales have problems due to flooding or erosion. Where possible, correct the underlying problem before trying to repair the symptom. If there is a problem with grass dying due to the swale being flooded during the wet season, there are two options: convert the swale to plant varieties that can stand being flooded or find a way to fix the swale so it drains. Vegetated Swale Operation, Maintenance, and Management Inspection Checklist for BMP Owners Project: _________________________________Owner Change since last inspection? Y N Owner Name, Address, Phone: ___________________________________________________________ Number: _____________________________________________________________________________ Location: _____________________________________________________________________________ Site Status _________________________________ Date: ________________________ Time: ________________________ Inspector: ____________________________________________________________________________ Maintenance Item Satisfactory/ Unsatisfactory Comments Inflow Points (Inspect annually and after major storms) 1. Vegetation/Debris/Sediment obstructing inflow 2. Erosion/undercutting 3. Displacement/blockage of inlet or river rock, apron, etc. 4. Pipe condition 5. Other (describe) Entire Length of Swale (Inspect annually and after major storms) 1. Trash debris 2. Bare soil/Erosion 3. Sediment accumulation 4. Vegetation height (too short/too tall) 5. Invasive vegetation 6. Erosion/damage to outlet 7. Other (describe) Additional Comments: _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ Actions to be taken: Timeframe: SECTION VI AQUA-SWIRL SYSTEMS The site contains one XC-8 Aqua-Swirl Xcellerator unit located at the downstream end of the storm sewer system prior to the storm sewer outlet. Swirl concentrators are designed to remove sediment, debris, and free oil from entering the sewer system. After construction the swirl concentrator should be inspected every six months and cleaned as needed or once a year regardless of whether it has reached full pollutant storage capacity. Disposal of all sediment, in addition to local requirements, must be in accordance with all federal and state requirements. See the attached O&M Manual for the swirl concentrator for complete details of inspection and cleaning. Inspection Inspect the unit every six months. The inspection should determine sediment depth, accumulation of trash and litter, and the specific maintenance and repairs needed. Annually check for cracks large enough to let soil enter the vault, broken or defective plates and baffles, and crushed or damaged pipes. Cleaning Remove trash and litter from the vault, inlet and piping when present. Remove sediment when it accumulates to the manufacturer’s maximum recommended depth. Cleaning should be performed in a way that ensures removed sediment and water is not discharged back into the storm sewer. Safety Work inside underground structures requires special OSHA-required confined space equipment and procedures Materials Handling Disposal of waste from maintenance of drainage facilities shall be conducted in accordance with federal, state, and local regulations. Removed sediment must be disposed in the garbage as solid waste. Water should be disposed of in a sanitary sewer after oils are removed using oil absorbent materials or other mechanical means. Used oil absorbents should be recycled or disposed according to the manufacturer's instructions. Repairs Repair any cracked or defective plates or baffles. Repair all security and access features so they are fully functional. This includes locking lids, covers, and ladder rungs. Replace broken parts or lids that rock or are moved by traffic. Site Name:Change in ownership since last inspection? Y N Owner Name: Owner Address: Owner Phone Number: Emergency Phone Number: Location: Date: Time: Inspector Name: Floatable Debris and Oil 1. Remove manhole lid to expose liquid surface of Aqua-SwirlTM . 2. Remove floatable debris with basket or net if any is present. 3. If a hydrocarbon spill has occurred, (e.g. more than a sheen of oil or gas is present) the system should be cleaned immediately (see "Cleaning" Figure 3). Note: Water in an Aqua-SwirlTM can appear black like oil due to the dark body of the surrounding structure. Oil appears darker than water in the system and is usually accompanied by debris (e.g. Styrofoam, etc.) with obvious signs of oil stains. The depth of oil can be measured with an oil/water interface probe, a stadia rod with water phylic paste, a coliwasa, or by simply collecting a representative sample with a jar attached to a rod. 4. If hydrocarbon absorbant floc or pads are used, these should be inspected to determine whether they are loaded with hydrocarbons. This will be indicated by a dark colaration of the pad or floc. Pads and/or floc should be removed and disposed of in accordance with City of Indianapolis and any applicable state and/or federal laws if they contain hydrocarbons. Sediment Accumulation Lower a dipstick tube equipped with a ball valve (e.g. Sludge Judge or similar device) into Aqua-SwirlTM through the service access provided. Measure the depth of the sludge. The sludge should not exceed 6" depth before maintenance. See Figures 1 and 2. 6" Figure 1 Figure 2 City of Indianapolis, Indiana Site and Owner Information Aqua-Swirl TM XCelerator ® Inspection Maintenance Items Operation, Maintenance, and Inspection Manual for BMP Owners (Note: Attach certifications for local regulatory authority including any applicable fees.) Aqua-SwirlTM O and M Manual Page 1 Diversion Structures If an external diversion structure is present on the site, this should be inspected for the following items. 1. Inspect weir or other structure for structural decay or damage. Weirs are more susceptible to damage than off-set piping and should be checked to confirm that they are not crumbling or decaying. 2. Inspect diversion structure and by-pass piping for signs of structural damage or blockage from debris or sediment accumulation. 3. Measure elevations on diversion weir or piping to ensure it is consistent with site plan design. 4. Inspect downstream structure in diversion system for signs of blockage or structural failure. Remove sediments, oils and other floatable pollutants with a vactor. Dispose of all waste in accordance with City of Indianapolis and any applicable state, and/or federal requirements. Oil should be pumped and removed with any liquids and sediments that have been trapped in the system. These liquids should be taken to an industrial waste water treatment facility for treatment. Liquids and solids pumped from the AquaSwirlTM should not be dumped back into the stormwater system or into a sanitary sewer. Figure 3 Note: The AquaSwirlTM is designed so that entry to the system is not necessary for inspection or maintenance. If, however, you wish to enter the system, this is an OSHA confined space entry and OSHA confined space entry procedures should be followed to enter the system. During Construction Inspect the AquaSwirlTM every three months (minimum) and clean the system as needed. The AquaSwirlTM should be inspected and cleaned at the end of construction regardless of whether it has reached its sediment or oil storage capacity. First Year Post-Construction Inspect the AquaSwirlTM every six months and clean the system as needed. Second and Subsequent Years Post-Construction If the AquaSwirlTM did not reach full sediment or floatable pollutant capacity in the First Year Post-Construction, the system can be inspected once annually and cleaned as needed or bi-annually at a minimum. If the AquaSwirlTM reached full sediment or floatable pollutant capacity in less than 12 months in the First Year Post-Construction, the system should be inspected at least once every six months and cleaned as needed. If site monitoring indicates that trapped sediment hardens over time, the AquaSwirlTM should be cleaned prior to sediment hardening regardless of whether it has reached its sediment storage capacity. Bypass Structures Bypass structures should be inspected whenever the AquaSwirlTM is inspected and maintained as needed. Cleaning Inspection (continued) Maintenance Schedule Aqua-SwirlTM O and M Manual Page 2 Company Name: Street Address: City, State, Zip: Contact: Office Phone: Mobile Phone: Pager: Date of cleaning:(Next inspection should be 3 months from this date for the first year). Time of cleaning: Date of next inspection: Floatable debris present (Y/N)? Oil present (Y/N)?Oil depth (inches): Any structural damage? Y N Where? Any evidence of structural wear? Y N Where? Odors present? Y N Describe: Any plugging? Y N Describe: Activity Log Structural Conditions and Comments Maintenance Company Information Aqua-SwirlTM O and M Manual Page 3 Additional Comments and/or Actions to Be Taken Time Frame NOTES: 1. Attach site plan showing Aqua-SwirlTM location. 2. Attach detail drawing showing Aqua-SwirlTM dimensions and model number. 3. If a diversion structure is used, attached details showing basic design and elevations. NOTES Aqua-SwirlTM O and M Manual Page 4 Date Construction Started: Date Construction Ended: Activity 1 2 3 4 5 6 7 8 9 10 11 12 Inspect and Clean as Needed X X X X Inspect Bypass Structures X X X X (if applicable) and Maintain As Needed Clean System*X* * The AquaSwirlTM should be cleaned once a year regardless of whether it has reached full pollutant storage capacity during the construction phase of the project. Activity 1 2 3 4 5 6 7 8 9 10 11 12 Inspect and Clean as Needed X X Inspect Bypass Structures X X (if applicable) and Maintain As Needed Clean System*X* * The AquaSwirlTM should be cleaned at the end of the first year post construction if it is at or near its pollutant storage capcacity. Otherwise, the system can be cleaned at a later date depending on how quickly the sediment starts to harden. Activity 1 2 3 4 5 6 7 8 9 10 11 12 Inspect and Clean as Needed*X X Inspect Bypass Structures*X X (if applicable) and Maintain As Needed Clean System* *If the AquaSwirlTM did not reach full sediment or floatable pollutant capacity in the First Year Post-Construction, the system can be inspected once annually. If the AquaSwirlTM reached full sediment or floatable pollutant capacity in less than 12 months in the First Year Post-Construction, the system should be inspected as frequently as past history warrants and cleaned as needed. Regardless of whether the AquaSwirlTM reaches full sediment or floatable storage capacity, it should be cleaned frequently enough to prevent captured sediments from hardening. Normally, cleaning once every two to three years should be sufficient to prevent sediments from hardening. *The bypass system should be inspected with each AquaSwirlTM inspection and maintained as needed. Aqua-Swirl TM TABULAR MAINTENANCE SCHEDULE Second and Subsequent Years Post-Construction Month During Construction Month First Year Post-Construction Month Aqua-SwirlTM O and M Manual Page 5 SECTION VII INLET CATCH BASIN (SUMPS) Catch Basins trap sediment and some oils that can pollute water bodies. They need to be inspected and cleaned annually to remove accumulated sediment, fluids, and trash. Inspection Inspect catch basins at least once per year. Periodically inspect the catch basin and surrounding areas for pollutants such as leaks from dumpsters, minor spills, and oil dumping. Act to have the pollutant source removed. Cleaning Clean catch basins when they become one third full to maintain sediment-trapping capacity. Catch basin and manhole cleaning should be performed in a manner that keeps removed sediment and water from being discharged back into the storm sewer. Clean putrid materials from catch basins when discovered or reported. Keep the inlet cleared of debris and litter. Safety Work inside underground structures requires special OSHA-required confined space equipment and procedures. The most practical option may be to contract with a sewer cleaning contractor. Materials Handling Disposal of waste from maintenance of drainage facilities shall be conducted in accordance with federal, state, and local regulations. Removed sediment must be disposed of in the garbage as solid waste. Water should be disposed of in a sanitary sewer after oils are removed using oil absorbent materials or other mechanical means. Used oil absorbents should be recycled or disposed according the manufacturer's instructions. Repairs Repair any damages that prevent the catch basin from functioning as designed. SECTION VIII INSPECTION AND MAINTENANCE SCHEDULE Structure/Unit Inspection Maintenance Storm Structure Maintenance Monthly & after rain events Accumulate 6” of sediment Conveyance Maintenance (Storm Sewer) When problems occur Accumulate 6” of sediment Conveyance Maintenance (Swales) When problems occur Accumulate 6” of sediment Aqua-Swirl Every 6 months Per manufacturers designated depth