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HomeMy WebLinkAboutO&M Manual LANDWORX BMP O&M MANUAL Site Improvements – Venture Church (Project #402) 14501 Hazel Dell Parkway Carmel, IN 46033 Prepared By: Chris Laystrom, PE, LandWorx Engineering, LLC Reviewed By: Benjamin Houle, PE, LandWorx Engineering, LLC Prepared For: Date: April 15, 2024 Permit: Table of Contents: 1. Owner Information 2. Site Information & Drawings 3. Inlet & Conveyance Maintenance 4. Water Quality System Maintenance 04/15/2024 Page 1 of 27 LANDWORX OWNER INFORMATION The Project located 14501 Hazel Dell Parkway, Carmel, Indiana will be owned by the following at time of construction: Owner: Hazel Dell Christian Church, Inc. Address: 14501 Hazel Dell Parkway, Carmel, IN 46033 Phone: 317.846.9828 Representative: On-Site Responsibility: Owner hereby attests that the Operation and Maintenance commitments contained within this document are true and will be completed. ____________________________________ (Signature) ____________________________________ (Printed) ____________________________________ (Date) STATE OF INDIANA ) ) SS COUNTY OF HAMILTON) Subscribed and sworn to before me this ________ day of ____________, 20____, ____________________________________ Notary Public ______________________ Commission Expiration Date ______________________ County of Residence 04/15/2024 Page 2 of 27 LANDWORX SITE INFORMATION AND DRAWINGS Site Information: The project site is located at 14501 Hazel Dell Parkway. The site includes a large church building, three interconnected parking lots, sidewalks, landscaping, associated utilities and two entrances off Hazel Dell Parkway. The project includes removing a large stone parking area immediately south of the church building and two temporary office / class structures, also south of the church. The proposed improvements include a pickleball court, maintenance building and storage yard, sidewalks, landscaping, outdoor seating at the church and associated utilities. The property is bounded to the east and south by single family residential homes, to the west by Hazel Dell Parkway and to the north by commercial development (medical services such as dental, hearing, etc.). The site is zoned S-1. Storm water detention for the improvements was included in the masterplan design, as was one water quality treatment structure. One additional water quality treatment structure is required for the improvements. Please see the attached grading and drainage plan of the site. 04/15/2024 Page 3 of 27 LANDWORX INLET & CONVEYANCE MAINTENANCE 04/15/2024 Page 4 of 27 LANDWORX Owner Required Periodic Inspections and Maintenance The property owner is responsible for required maintenance and inspections on the on-site stormwater inlets, including costs associated with such work. The Owner is required to complete all checklist items and submit the completed checklist to the City on an annual basis upon request by the City or City’s representatives. The owner shall keep records of inspections and maintenance activities and self-certify that work was performed according to the O&M Manual when requested by the City. Inlets The property owner or their representative, knowledgeable in BMP operations, will inspect all inlet castings at least monthly and again within 24 hours of every ½ inch rain event. Catch basins and inlets should be inspected at least quarterly. 1. Trash/litter/debris should be picked up and properly disposed of to prevent it from clogging the castings or getting into the storm drainage system and downstream waterways. 2. Catch basins/yard drains/inlets should be checked for sediment depth. Should the depth be greater than 1.5” (adjacent to 6” pipe), 2” (adjacent to 8” pipe), or 3” (adjacent to 12” pipe) the sediment should be immediately cleaned out. 3. Disposal of sediment must be in accordance with all federal, state and local requirements and should NOT be dumped into the storm or sanitary sewer. Conveyances The property owner or their representative, knowledgeable in BMP operations, will inspect all conveyances (including swales, pavements, sags surrounding inlets) at least monthly and again within 24 hours of every ½ inch rain event. 1. All green spaces will be maintained with regular mowing during growing seasons. 2. Any grassed or vegetated areas that experience erosion shall be repaired and revegetated as soon as possible. 3. Erosion of any berms or swales shall be addressed as soon as it becomes visible by filling the eroded area with suitable soil and establishing vegetation immediately, preferably by sodding. 4. Swales shall be unobstructed by vegetation, fences, buildings, and have a uniform slope. 5. Trash or litter should be picked up and properly disposed of to prevent it from getting into the storm drainage system and downstream waterways. 6. Pavement areas should be monitored for pollutants, any large quantities of fluids such as oil, antifreeze, brake fluid, etc. found on the pavement should be reported to the owner. The owner should clean the pollutants and prevent them from entering the drainage system. 7. Pipes should be inspected quarterly for sediment depth. Should the depth be greater than 1.5” (6” pipe), 2” (8” pipe), or 3” (12” pipe) the sediment should be immediately cleaned out. 04/15/2024 Page 5 of 27 LANDWORX 8. Disposal of sediment must be in accordance with all federal, state and local requirements and should NOT be dumped into the storm or sanitary sewer. 04/15/2024 Page 6 of 27 04/15/2024 Page 7 of 27 04/15/2024 Page 8 of 27 LANDWORX WATER QUALITY SYSTEM MAINTENANCE 04/15/2024 Page 9 of 27 LANDWORX Owner Required Periodic Inspections and Maintenance The property owner is responsible for all required maintenance and inspections, including costs associated with such work. The Owner is required to complete all checklist items and submit the completed checklist to the City on an annual basis upon request by the City or City’s representatives. The property owner or their representative, knowledgeable in BMP operations, will inspect the structure at least monthly and again with 24 hours of every ½ inch rain event. The checklist for owner-required inspections is provided in this report. Specific BMP Maintenance can be found in the manufacturer’s information. General maintenance of the site and BMP includes, but is not limited to: 1. All green spaces will be maintained with regular mowing during growing seasons. Periodic fertilizer applications will also occur to the green spaces. 3. Any grassed or vegetated areas that experience erosion shall be repaired and revegetated as soon as possible. 4. Erosion of any berms or swales shall be addressed as soon as it becomes visible by filling the eroded area with suitable soil and establishing vegetation immediately, preferably by sodding. 5. Trash or litter should be picked up and properly disposed of to prevent it from getting into the storm drainage system and downstream waterways. 6. Pavement areas should be monitored for pollutants, any large quantities of fluids such as oil, antifreeze, brake fluid, etc. found on the pavement should be reported to the owner. The owner should clean the pollutants and prevent them from entering the BMP. If any of these fluids get into the BMP, the BMP shall be cleaned immediately. The contaminated filter media shall be disposed of properly. 7. Removal of debris from storm structures. 8. SQU should be inspected quarterly for sediment depth. Should the depth be greater than 6” the sediment should be immediately cleaned out. 9. SQU shall be cleaned immediately if there is a hydrocarbon spill (e.g. gasoline or oil). 10. Disposal of sediment must be in accordance with all federal, state and local requirements and should NOT be dumped into the storm sewer or sanitary sewer. Completed inspection forms must be maintained by the BMP owner and produced upon request by the City of Carmel. The City must be notified of any changes in BMP ownership, major repairs or BMP failure in writing within 30 days. The letter should be addressed to: 04/15/2024 Page 10 of 27 LANDWORX City of Carmel Engineering Department One Civic Square Carmel, Indiana 46032 04/15/2024 Page 11 of 27 Page 1 of 15 Aqua-Swirl® Stormwater Treatment System Inspection and Maintenance Manual AquaShieldTM, Inc. 2705 Kanasita Drive Chattanooga, TN 37343 Toll free (888) 344-9044 Phone: (423) 870-8888 Fax: (423) 826-2112 Email: info@aquashieldinc.com www.aquashieldinc.com March 2013 © AquaShieldTM, Inc. 2013 04/15/2024 Page 12 of 27 Page 2 of 15 Table of Contents Page(s) AquaShieldTM Stormwater Treatment Systems 3 Aqua-Swirl® Stormwater Treatment System 4 – 9 Inspection and Maintenance Worksheets 10 – 14 Aqua-Swirl® Tabular Maintenance Schedule 15 AquaShieldTM, Inc. 2705 Kanasita Drive Chattanooga, Tennessee 37343 Toll free (888) 344-9044 Fax (423) 870-2112 www.aquashieldinc.com 04/15/2024 Page 13 of 27 Page 3 of 15 AquaShield™, Inc Stormwater Treatment Solutions The highest priority of AquaShieldTM, Inc. (AquaShield™) is to protect waterways by providing stormwater treatment solutions to businesses across the world. These solutions have a reliable foundation based on over 20 years of water treatment experience. Local regulators, engineers, and contractors have praised the AquaShield™ systems for their simple design and ease of installation. All the systems are fabricated from high performance, durable and lightweight materials. Contractors prefer the quick and simple installation of our structures that saves them money. The patented line of AquaShield™ stormwater treatment products that provide high levels of stormwater treatment include the following: Aqua-Swirl® Stormwater Treatment System: hydrodynamic separator, which provides a highly effective means for the removal of sediment, floating debris and free- oil. Aqua-FilterTM Stormwater Filtration System: treatment train stormwater filtration system capable of removing gross contaminants, fine sediments, waterborne hydrocarbons, heavy metals and total phosphorous. Aqua-Swirl® Stormwater Treatment System Aqua-Filter™ Stormwater Filtration System 04/15/2024 Page 14 of 27 Page 4 of 15 Aqua-Swirl® Stormwater Treatment System The patented Aqua-Swirl® Stormwater Treatment System is a single chamber hydrodynamic separator which provides a highly effective means for the removal of sediment, free oil, and floating debris. Both treatment and storage are accomplished in the swirl chamber without the use of multiple or “blind” chambers. Independent laboratory and field performance verifications have shown that the Aqua-Swirl® achieves over 80% suspended solids removal efficiency on a net annual basis. The Aqua-Swirl® is most commonly installed in an “off-line” configuration. Or, depending on local regulations, an “in-line” (on-line) conveyance flow diversion (CFD) system can be used. The CFD model allows simple installation by connecting directly to the existing storm conveyance pipe thereby providing full treatment of the “first flush,” while the peak design storm is diverted and channeled through the main conveyance pipe. The patented Aqua-Swirl® Stormwater Treatment System provides a highly effective means for the removal of sediment, floating debris, and free oil. Swirl technology, or vortex separation, is a proven form of treatment utilized in the stormwater industry to accelerate gravitational separation. 04/15/2024 Page 15 of 27 Page 5 of 15 Floatable debris in the Aqua-Swirl® Each Aqua-Swirl® is constructed of high performance, lightweight and durable materials including polymer coated steel (PCS), high density polyethylene (HDPE), or fiberglass reinforced polymer (FRP). These materials eliminate the need for heavy lifting equipment during installation. System Operation The treatment operation begins when stormwater enters the Aqua-Swirl® through a tangential inlet pipe that produces a circular (or vortex) flow pattern that causes contaminates to settle to the base of the unit. Since stormwater flow is intermittent by nature, the Aqua-Swirl® retains water between storm events providing both dynamic and quiescent settling of solids. The dynamic settling occurs during each storm event while the quiescent settling takes place between successive storms. A combination of gravitational and hydrodynamic drag forces encourages the solids to drop out of the flow and migrate to the center of the chamber where velocities are the lowest. The treated flow then exits the Aqua-Swirl® behind the arched outer baffle. The top of the baffle is sealed across the treatment channel, thereby eliminating floatable pollutants from escaping the system. A vent pipe is extended up the riser to expose the backside of the baffle to atmospheric conditions, preventing a siphon from forming at the bottom of the baffle. Custom Applications The Aqua-Swirl® system can be modified to fit a variety of purposes in the field, and the angles for inlet and outlet lines can be modified to fit most applications. The photo below demonstrates the flexibility of Aqua-Swirl® installations using a “twin” configuration in order to double the 04/15/2024 Page 16 of 27 Page 6 of 15 Custom designed AS-9 Twin Aqua-Swirl® water quality treatment capacity. Two Aqua-Swirl® units were placed side by side in order to treat a high volume of water while occupying a small amount of space. Retrofit Applications The Aqua-Swirl® system is designed so that it can easily be used for retrofit applications. With the invert of the inlet and outlet pipe at the same elevation, the Aqua-Swirl® can easily be connected directly to the existing storm conveyance drainage system. Furthermore, because of the lightweight nature and small footprint of the Aqua-Swirl®, existing infrastructure utilities (i.e., wires, poles, trees) would be unaffected by installation. AquaShield™ Product System Maintenance The long term performance of any stormwater treatment structure, including manufactured or land based systems, depends on a consistent maintenance plan. Inspection and maintenance functions are simple and easy for the AquaShieldTM Stormwater Treatment Systems allowing all inspections to be performed from the surface. It is important that a routine inspection and maintenance program be established for each unit based on: (a) the volume or load of the contaminants of concern, (b) the frequency of releases of contaminants at the facility or location, and (c) the nature of the area being drained. In order to ensure that our systems are being maintained properly, AquaShieldTM offers a maintenance solution to all of our customers. We will arrange to have maintenance performed. 04/15/2024 Page 17 of 27 Page 7 of 15 Inspection All AquaShieldTM products can be inspected from the surface, eliminating the need to enter the systems to determine when cleanout should be performed. In most cases, AquaShieldTM recommends a quarterly inspection for the first year of operation to develop an appropriate schedule of maintenance. Based on experience of the system’s first year in operation, we recommend that the inspection schedule be revised to reflect the site-specific conditions encountered. Typically, the inspection schedule for subsequent years is reduced to semi-annual inspection. Aqua-Swirl® Maintenance The Aqua-Swirl® has been designed to minimize and simplify the inspection and maintenance process. The single chamber system can be inspected and maintained entirely from the surface thereby eliminating the need for confined space entry. Furthermore, the entire structure (specifically, the floor) is accessible for visual inspection from the surface. There are no areas of the structure that are blocked from visual inspection or periodic cleaning. Inspection of any free- floating oil and floatable debris can be directly observed and maintained through the manhole access provided directly over the swirl chamber. Aqua-Swirl® Inspection Procedure To inspect the Aqua-Swirl®, a hook is needed to remove the manhole cover. AquaShieldTM provides a customized manhole cover with our distinctive logo to make it easy for maintenance crews to locate the system in the field. We also provide a permanent metal information plate affixed inside the access riser which provides our contact information, the Aqua-Swirl® model size, and serial number. 04/15/2024 Page 18 of 27 Page 8 of 15 Sediment inspection using a stadia rod in a single chamber Maintain system when sediment is 42-48 inches below water surface. Maximum sediment storage capacity reached when sediment is 30 inches below water surface. The only tools needed to inspect the Aqua-Swirl® system are a flashlight and a measuring device such as a stadia rod or pole. Given the easy and direct accessibility provided, floating oil and debris can be observed directly from the surface. Sediment depths can easily be determined by lowering a measuring device to the top of the sediment pile and to the surface of the water. When the sediment pile is within 42 to 48 inches of the water surface (or sediment pile thickness is 18 to 24 inches as measured from the base), the system should be maintained. The maximum sediment storage capacity of the Aqua-Swirl® is reached when the sediment pile is within 30 inches of the water surface (or sediment accumulation is 36 inches thick as measured from the base). It should be noted that in order to avoid underestimating the volume of sediment in the chamber, the measuring device must be carefully lowered to the top of the sediment pile. Keep in mind that the finer sediment at the top of the pile may offer less resistance to the measuring device than the larger particles which typically occur deeper within the sediment pile. The Aqua-Swirl® design allows for the sediment to accumulate in a semi-conical fashion as illustrated above. That is, the depth to sediment as measured below the water surface may be less in the center of the swirl chamber; and likewise, may be greater at the edges of the swirl chamber. Aqua-Swirl® Cleanout Procedure Cleaning the Aqua-Swirl® is simple and quick. Free-floating oil and floatable debris can be observed and removed directly through the 30-inch service access riser provided. A vacuum truck is typically used to remove the accumulated sediment and debris. An advantage of the 42-48” 04/15/2024 Page 19 of 27 Page 9 of 15 Vacuum truck quickly cleans the Aqua-Swirl® from a single chamber Aqua-Swirl® design is that the entire sediment storage area can be reached with a vacuum hose from the surface (reaching all the sides). Since there are no multiple or limited (hidden or “blind”) chambers in the Aqua-Swirl®, there are no restrictions to impede on-site maintenance tasks. Disposal of Recovered Materials Disposal of recovered material is typically handled in the same fashion as catch basin cleanouts. AquaShieldTM recommends that all maintenance activities be performed in accordance with appropriate health and safety practices for the tasks and equipment being used. AquaShieldTM also recommends that all materials removed from the Aqua-Swirl® and any external structures (e.g, bypass features) be handled and disposed in full accordance with any applicable local and state requirements. Aqua-Swirl® Inspection and Maintenance Work Sheets on following pages 04/15/2024 Page 20 of 27 Page 10 of 15 Aqua-Swirl® Inspection and Maintenance Manual Work Sheets SITE and OWNER INFORMATION Site Name: Site Location: Date: Time: Inspector Name: Inspector Company: Phone #: Owner Name: Owner Address: Owner Phone #: Emergency Phone #: INSPECTIONS I. Floatable Debris and Oil 1. Remove manhole lid to expose liquid surface of the Aqua-Swirl®. 2. Remove floatable debris with basket or net if any present. 3. If oil is present, measure its depth. Clean liquids from system if one half (½) inch or more oil is present. Note: Water in Aqua-Swirl® can appear black and similar to oil due to the dark body of the surrounding structure. Oil may appear darker than water in the system and is usually accompanied by oil stained debris (e.g. Styrofoam, etc.). The depth of oil can be measured with an oil/water interface probe, a stadia rod with water finding paste, a coliwasa, or collect a representative sample with a jar attached to a rod. II. Sediment Accumulation 1. Lower measuring device (e.g. stadia rod) into swirl chamber through service access provided (Figure 1). From a reference point at the top of the service access: 2. Record distance to top of sediment pile (Figure 2): inches 3. Record distance to top of water surface: inches 4. Calculate distance to sediment minus distance to water: inches 5. Schedule cleaning if value in Step #4 is 48 to 42 inches or less. The sediment storage capacity is exceeded when the depth to sediment is within 30 inches of the water surface and maintenance should be performed immediately. 04/15/2024 Page 21 of 27 Page 11 of 15 III. Diversion Structures (External Bypass Features) If a diversion (external bypass) configuration is present, it should be inspected as follows: 1. Inspect weir or other bypass feature 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 (concrete or brick) or decaying (steel). 2. Inspect diversion structure and bypass piping for signs of structural damage or blockage from debris or sediment accumulation. 3. When feasible, measure elevations on diversion weir or piping to ensure it is consistent with site plan designs. 4. Inspect downstream (convergence) structure(s) for sign of blockage or structural failure as noted above. CLEANING Schedule cleaning with local vactor company or AquaShieldTM to remove sediment, oil and other floatable pollutants. The captured material generally does not require special treatment or handling for disposal. Site-specific conditions or the presence of known contaminants may necessitate that appropriate actions be taken to clean and dispose of materials captured and retained by the Aqua-Swirl®. All cleaning activities should be performed in accordance with property health and safety procedures. AquaShieldTM always recommends that all materials removed from the Aqua-Swirl® during the maintenance process be handled and disposed in accordance with local and state environmental or other regulatory requirements. Figure 2. Maintain system when sediment is 42 to 48 inches below water surface to ensure proper system operation and performance. Maximum sediment storage capacity is reached when sediment is 30 inches below water surface. Figure 1. Measuring sediment in swirl chamber using stadia rod. Inspections are performed from the surface through the manhole access cover. 42-48” 04/15/2024 Page 22 of 27 Page 12 of 15 MAINTENANCE SCHEDULE I. During Construction Inspect the Aqua-Swirl® every three (3) months and clean the system as needed. The Aqua-Swirl® should be inspected and cleaned at the end of construction regardless of whether it has reached its maintenance trigger (42 to 48 inches below water surface), sediment storage capacity (30 inches below water surface). II. First Year Post-Construction Inspect the Aqua-Swirl® every three (3) months and clean the system as needed. Inspect and clean the system once annually regardless of whether it has reached its sediment or floatable pollutant storage capacity. III. Second and Subsequent Years Post-Construction If the Aqua-Swirl® did not reach full sediment or floatable pollutant capacity in the First Year Post-Construction period, the system can be inspected and cleaned once annually. If the Aqua-Swirl® reached full sediment or floatable pollutant capacity in less than 12 months in the First Year Post-Construction period, the system should be inspected once every six (6) months and cleaned as needed. The Aqua-Swirl® should be cleaned annually regardless of whether it reaches its sediment or floatable pollutant capacity. IV. Bypass Structures Bypass structures should be inspected whenever the Aqua-Swirl® is inspected. Maintenance should be performed on bypass structures as needed. MAINTENANCE COMPANY INFORMATION Company Name: Street Address: City: State/Prov.: Zip/Postal Code: Contact: Title: Office Phone: Cell Phone: 04/15/2024 Page 23 of 27 Page 13 of 15 ACTIVITY LOG Date of Cleaning: (Next inspection should be 3 months from this data for first year). Time of Cleaning: Start: End: Date of Next Inspection: Floatable debris present: Yes No Notes: Oil present: Yes No Oil depth (inches): Measurement method and notes: STRUCTURAL CONDITIONS and OBSERVATIONS Structural damage: Yes No Where: Structural wear: Yes No Where: Odors present: Yes No Describe: Clogging: Yes No Describe: Other Observations: 04/15/2024 Page 24 of 27 Page 14 of 15 NOTES Additional Comments and/or Actions To Be Taken Time Frame ATTACHMENTS Attach site plan showing Aqua-Swirl® location. Attach detail drawing showing Aqua-Swirl® dimensions and model number. If a diversion configuration is used, attach details showing basic design and elevations (where feasible). 04/15/2024 Page 25 of 27 Page 15 of 15 Aqua-Swirl® TABULAR MAINTENANCE SCHEDULE Date Construction Started: Date Construction Ended: During Construction Month Activity 1 2 3 4 5 6 7 8 9 10 11 12 Inspect and Clean as needed X X X X Inspect Bypass and maintain as needed X X X X Clean System* X* * The Aqua-Swirl® should be cleaned once a year regardless of whether it has reached full pollutant storage capacity. In addition, the system should be cleaned at the end of construction regardless of whether it has reach full pollutant storage capacity. First Year Post-Construction Month Activity 1 2 3 4 5 6 7 8 9 10 11 12 Inspect and Clean as needed X X X X Inspect Bypass and maintain as needed X X X X Clean System* X* * The Aqua-Swirl® should be cleaned once a year regardless of whether it has reached full pollutant storage capacity. Second and Subsequent Years Post-Construction Month Activity 1 2 3 4 5 6 7 8 9 10 11 12 Inspect and Clean as needed X* Inspect Bypass, maintain as needed X* Clean System* X* * If the Aqua-Swirl® did not reach full sediment or floatable pollutant capacity in the First Year Post-Construction period, the system can be inspected and cleaned once annually. If the Aqua-Swirl® reached full sediment or floatable pollutant capacity in less than 12 months in the First Year Post-Construction period, the system should be inspected once every six (6) months or more frequently if past history warrants, and cleaned as needed. The Aqua -Swirl® should be cleaned annually regardless of whether it reaches its full sediment or floatable pollutant capacity. 04/15/2024 Page 26 of 27 LANDWORX City of Carmel Performed Inspections City of Carmel representatives have the right to enter the property to inspect the subject BMP. The property owner shall perform maintenance as a result of said City inspection and bare any costs associated. Annual inspections of permanent BMPs will be performed by the City of Carmel. The property owner shall be responsible for payment of inspection fees required by the City of Carmel. The current fee amounts may be found by contacting the City of Carmel. In the event that the City finds a BMP in need of maintenance or repair, the City will notify the BMP owner of the necessary maintenance or repairs and give the landowner a timeframe for completing the work. If the work is not completed within the designated timeframe, the City shall perform the work and bill the landowner for the actual costs. Remedial maintenance, such as inlet replacement, outlet repairs, etc. shall be coordinated with the City of Carmel and performed by the property owner in a timeframe agreed upon by both parties. 04/15/2024 Page 27 of 27