Loading...
HomeMy WebLinkAboutO&M Manual 08-14-19 Stormwater Operations and Maintenance Manual Schafer Powder Coating 4518 W. 99th Street Carmel, Indiana 46032 Prepared for: Schafer Powder Coating Inc. 4518 W. 99th Street Carmel, IN 46032 Prepared by: Kimley-Horn and Associates, Inc. 250 East 96th Street, Suite 580 Indianapolis, Indiana 46240 Contact: Bill Butz, P.E. I affirm, under penalties for perjury, that I have taken reasonable care to redact each Social Security number in this document, unless required by law. – Bill Butz Prepared on: August 14, 2019 2 Water Quality BMPs Water Quality Best Management Practices (BMPs) are vegetative, structural, and other measures that reduce or eliminate pollutants that might otherwise be carried by surface runoff. Potential pollutant sources include spills from the litter from patrons and automobile fluids on the pavement including heavy metals, oil, grease, and alcohols. BMP Owner Contact Information Name: Mark P Schafer Address: 4518 W 99th Street Business Phone Number: 317-228-9987 Party Responsible Routine inspections are the responsibility of the BMP owner. Maintenance is also the responsibility of the owner. The BMP owner shall be financially responsible for any maintenance or repairs required by the City or its representatives during the City’s inspections. The approved maintenance plan and inspection forms provided with this manual should be used as guidance for performing maintenance activities. The City will require yearly inspection reports of the water quality BMPs. The first will be due one year after the Notice of Termination is submitted. Right of Entry The City of Carmel has the right to enter the subject property to inspect the pond, BMP, and storm sewer. Water Quality BMPs Description Stormwater runoff from the site will sheet flow to the proposed and existing storm structures and storm sewer that discharge to the existing pond. The North side of the site will have flow rerouted into proposed Reinforced Concrete Pipe that will flow into a Proposed AS-5 Aqua-Swirl prior to flowing into the pond. The storm structures, Aqua-Swirl, storm sewer and pond will need to be inspected and maintained per the requirements below. The pond is located near the Southeast corner of the property and discharges to the South through an existing 24-inch pipe that flows to the Southeast. 3 Storm Structure Maintenance and Inspection Storm structures on site are identified in an exhibit in Appendix A. Storm structures are set at storm sewer pipe connections. Unless you have OSHA approved training and equipment, never enter a manhole. Inspection and maintenance of all storm structures is required per the table below. Storm Structure Maintenance and Inspection Inspection All inlet castings should be inspected every 6 months and after each major rainfall event. More frequent inspections should be performed in areas where there is higher potential for trash or litter 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 10% of the pipe diameter. Cleaning should be performed in a way that ensures removed sediment and water is not discharged back into the storm sewer. 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. 4 Storm Sewer Maintenance and Inspection 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. Storm sewer maintenance and inspection required per the table below. Storm Sewer Maintenance and Inspection 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 10% of the pipe diameter. 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. 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. Wet/Dry Detention Basin Maintenance and Inspection The pond intercepts stormwater runoff from the site before discharging to the Southeast. The runoff from the site is treated by the existing pond which also controls the volume of runoff released from the site. Maintenance is necessary for a stormwater pond to operate as designed on a long-term basis. The pollutant removal, channel protection and flood control capabilities of the pond will decrease if permanent pool elevations fluctuate, debris blocks the outlet structure, pipes are damaged, sediment accumulates in the pond and reduces the storage volume, slope stabilizing vegetation is lost, or the structural integrity of the embankment or rise is compromised. The pond should be inspected and maintained once per year and after every large rain invent. An inspection checklist can be found in the Appendix. AquaSwirl Structure An AquaSwirlTM Concentrator is a swirl concentrator that removes pollutants from stormwater. These pollutants include anything that is significantly heavier or lighter than water. Such pollutants include sediment and oil from parking lots, Styrofoam cups and food packaging, cigarette butts, and other 5 debris. The AquaSwirlTM will also remove any heavy metals or nutrients (phosphorous and nitrates) that will bond to the sediment and organic material that the AquaSwirlTM removes. The AquaSwirlTM is a one-piece plastic, or Fiberglass Re-enforced Plastic (FRP), structure that includes a cast iron frame and cover. The cover of the AquaSwirlTM has the company logo on it to make it easy to find for maintenance. The opening has a 30” diameter to provide easy access for maintenance from grade level. There should never be a need for someone to enter the AquaSwirlTM. It is designed so that inspection and maintenance can be easily conducted from grade level. Because AquaSwirl’s TM collect pollutants, they need to be inspected and cleaned periodically. In Carmel, Indiana the owner of the property, where an AquaSwirlTM is installed, is responsible for maintaining the system and the associated cost. 6 List of Attachments Attachment A: O&M Exhibit – BMP Site Map Attachment B: Inspection and Maintenance Checklists Attachment C: Aqua-Swirl Detail Attachment D: BMP Owner Acknowledgement Agreement 7 Attachment A – O&M Exhibit SEA Group, Land Surveyors SEA Group, Land Surveyors ©O&M EXHIBITSCHAFER POWDERCOATING 4518 W 99THST CARMEL, IN 46032SHEET NUMBER EX. 1 08/14/19 NORTH 8 Attachment B – Inspection and Maintenance Checklist © AquaShieldTM, Inc. 2016. All rights reserved. Aqua-Swirl® Stormwater Treatment System Inspection and Maintenance Manual AquaShieldTM, Inc. 2733 Kanasita Drive Suite 111 Chattanooga, TN 37343 Toll free (888) 344-9044 Phone: (423) 870-8888 Fax: (423) 826-2112 Email: info@aquashieldinc.com www.aquashieldinc.com November 2016 © AquaShieldTM, Inc. 2016. All rights reserved. Floatable debris in the Aqua-Swirl® Aqua-Swirl® Stormwater Treatment System The Aqua-Swirl® Stormwater Treatment System (Aqua-Swirl®) is a vortex-type hydrodynamic separator designed and supplied by AquaShieldTM, Inc. (AquaShieldTM). Aqua-Swirl® technology removes pollutants including suspended solids, debris, floatables and free-floating oil from stormwater runoff. Both treatment and storage are accomplished in the single swirl chamber without the use of multiple or hidden, blind access chambers. Aqua-Swirl® Stormwater Treatment System © AquaShieldTM, Inc. 2016. All rights reserved. Custom designed AS-9 Twin Aqua-Swirl® 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 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. © AquaShieldTM, Inc. 2016. All rights reserved. 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. Aqua-Swirl® 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 Aqua-Swirl® 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. Aqua-Swirl® manhole cover © AquaShieldTM, Inc. 2016. All rights reserved. Inspection The Aqua-Swirl® can be inspected from the surface, eliminating the need to enter the system 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. 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 typically 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. 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. 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 below. 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. © AquaShieldTM, Inc. 2016. All rights reserved. Sediment inspection using a stadia rod Maximum recommended sediment depth prior to cleanout is 14 inches for all Aqua-Swirl® models 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 Aqua-Swirl® design is that the entire sediment storage area can be reached with a vacuum hose 42-48” 14” © AquaShieldTM, Inc. 2016. All rights reserved. Vacuum (vactor) truck quickly cleans the single open access swirl chamber from the surface reaching all the sides. Since there are no multiple or limited (blind) access chambers in the Aqua-Swirl®, there are no restrictions to impede on-site maintenance tasks. Disposal of Recovered Materials 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 © AquaShieldTM, Inc. 2016. All rights reserved. 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 until top of sediment pile is reached. 2. Record distance to top of sediment pile from top of standing water: inches. 3. Maximum recommended sediment depth prior to cleanout is 14 inches for all models. Consult system shop drawing for treatment chamber depth as measured from the inlet pipe invert to base of the unit. © AquaShieldTM, Inc. 2016. All rights reserved. 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. 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. 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 annuall y. © AquaShieldTM, Inc. 2016. All rights reserved. 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: 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 © AquaShieldTM, Inc. 2016. All rights reserved. Structural damage: Yes No Where: Structural wear: Yes No Where: Odors present: Yes No Describe: Clogging: Yes No Describe: Other Observations: 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). © AquaShieldTM, Inc. 2016. All rights reserved. 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. Detention Pond Operation, Maintenance, and Management Inspection Checklist Project: Location: Date: Time: Ins pector: Title: Signature: Maintenance Item Satisfa ctory/ Unsatis fa ctory Comm ents 1 . Em ba nkm e nt and em er genc y spillw a y He alth y veg eta tio n with a t lea s t 85 % groun d co ve r. No s ig ns o f eros i o n o n e m b an km ent. No ani m a l bu rro ws . Em ban km en t is free o f cra cki ng , bu lgi n g, or s liding. Em ban km en t is free o f woo dy ve g etatio n. Em ban km en t is free o f l ea ks o r s eep s Em erg e n cy s pil lw ay is cle ar of ob s tructio ns . Vertica l/ho ri zon tal a lign m e nt o f top of d a m “As Built” 2 . Ris e r and princ ipal s pillw ay L ow flo w ou tlet fre e o f ob s tru cti on . Tras h rack is not blocked o r d am ag ed. Ri s er i s fre e o f exces s ive s ed i m e nt b uil d up Ou tlet p ipe i s in g o o d co ndition. Co ntro l valve is op era tion al Ou tfall ch an nels are s table a n d free o f s couring . Ma inte nanc e Item Satisfactory/ Uns atisfactory Com me nts 3. Per manent Pool (W e t Ponds) N o Evidence of unde s irabl e vegetation N o a ccu m ulation o f fl oatin g or floatable Debris N o e viden ce of s horelin e s cou r or eros i on 4. Sedime nt Foreba ys Sedim ent i s being colle cted by forebay(s ) Forebay i s not i n need of cleanout (l es s than 50% full) 6. Condition of Outfa ll into Ponds N o riprap failures N o eviden ce o f s lope eros ion o r s cou ri ng Storm drain p ipes are i n good condi tion , wit h no e vidence o f non-s to rm wate r dis ch arges Endwalls /Headwalls are i n g ood condition 9 Attachment C – Aqua-Swirl Detail Phone (888) 344-9044 Fax (423) 826-2112 www.aquashieldinc.com Aqua-Swirl Concentrator Model AS-5 HDPE Standard Detail AS-5 STD 03/20/15 Scale: Drawn By: Document: Date: JCW 1:20 U.S. Patent No. 6524473 and other Patent Pending Aqua-Swirl High Density Polyethylene (HDPE) Stormwater Treatment System * Please see accompanied Aqua-Swirl specification notes. * See Site Plan for actual system orientation. **2ULHQWDWLRQPD\YDU\IURPƒƒRU custom angles to meet site conditions. 4 1/2" [114 mm] 1/2" [13 mm] 1" [25 mm] Manhole Frame & Cover Detail NTS For Non-Traffic Areas Only Soil 1" [25 mm] Unless other traffic barriers are present, bollards shall be placed around access riser(s) in non-traffic areas to prevent inadvertent loading by maintenance vehicles. Place small amount of concrete [3,000 psi [20 MPa] (min)] to support and level manhole frame. DO NOT allow manhole frame to rest upon riser. Riser Frame Cover 48" [1219 mm] Min. 12" [305 mm] Wrap Compressible Expansion Joint Material to a minimum 1-inch [25 mm] thickness around top of riser to allow transfer of inadvertent loading from manhole cover to concrete slab. Backfill (90% Proctor Density) Concrete 8" [203 mm] Gravel Backfill A 79" [2007 mm] Vent A 79" [2007 mm] Arched Baffle ƒ InletOutlet 12 3/4" [324 mm] OD Max Structural Rail Pipe coupling by Contractor. 12" [305 mm] long Stub-out by Manufacturer. Pipe coupling by Contractor. 12" [305 mm] long Stub-out by Manufacturer. ‘66 7/8" [‘1699 mm] 12 3/4" [324 mm] OD Max Octagonal Base Plate Plan View Backfill (Sand or Crushed Stone) Bedding Undisturbed Soil 12" [305 mm] 24" [610 mm] Section A-A Gravel Backfill shall extend at least 2 feet [610 mm] outward from Swirl Concentrator and for the full height of the Swirl Concentrator (including riser) extending laterally to undisturbed soils. (See MH Detail Below) Vent Riser 32" [813 mm] OD Grade (Rim) Manhole Frame and Cover by Manufacturer. (See Details) Rim elevations to match finished grade. HDPE risers can be field cut by Contractor. Varies Phone (888) 344-9044 www.aquashieldinc.com Arched Baffle68" [1727 mm] 104" [2642 mm] Swirl Inlet Structural Rail Swirl Outlet 4 1/2" [114 mm] Gravel Backfill 1/2" [13 mm] 1" [25 mm] Manhole Frame & Cover Detail NTS For H-20 Traffic Loading Areas Concrete Paving 1" [25 mm] Wrap Compressible Expansion Joint Material to a minimum 1-inch [25 mm] thickness around top of riser to allow transfer of traffic loading from manhole cover to concrete slab. Backfill (90% Proctor Density) Support and Level manhole frame with concrete pad. DO NOT allow manhole frame to rest upon HDPE riser. Riser Frame Cover 10" [254 mm]10" [254 mm] Gravel Backfill Concrete Paving 3" [76 mm] Typ. If traffic loading (H-20) is required or anticipated, a concrete pad must be placed over the entire Stormwater Treatment System per concrete design as calculated by Engineer. Sample details of concrete pad available upon request. 10 Attachment D – BMP Owner Acknowledgment Agreement BMP 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 a 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 City by another party who assumes all of the obligations and responsibilities of Owner as set forth herein. BMPs: _____Aquaswirl (AS-5)_ ______________________________ ___________________________________________________ ___________________________________________________ _______________________________ _________________________ Owner Signature Date _______________________________ _____________________________ Printed Name Company STATE OF INDIANA ) ) SS: COUNTY OF HAMILTON ) 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 Signature ______________________________ ______________________________ Commission Expiration Date Printed Name