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Home My WebLink AboutO&M Manual 01-10-20W:\CalAtlantic Homes\2018-169 CalAtlantic- Rohrer Rd Townhomes\Design\Calcs\O&M Manual\2018-169-O&M Manual.docx Monon Crossing Townhomes Operation & Maintenance Manual BMP Owner: Lennar Homes of Indiana, Inc. Contact: Stuart Huckelberry Address: 9025 North River Road, Suite 100 Indianapolis, IN 46240 Phone: 317-659-3232 Prepared By: HWC Engineering Contact: Kyle Eichhorn, P.E. Address: 135 N. Pennsylvania Street, Suite 2800 Indianapolis, IN 46204 Phone: 317-385-1334 Date Prepared: January 10, 2020 Job Number: 2018-169 Project Information This Operation and Maintenance (O&M) Manual has been prepared for Monon Crossing Townhomes to help the owner operate and maintain the post-construction Best Management Practices (BMPs). Monon Crossing Townhomes utilizes a Dry Pond and an AquaSwirl hydrodynamic separator as BMPs to handle water quality. BMP Owner Contact Information Lennar Homes of Indiana, Inc. Contact Person: Stu Huckelberry 9025 North River Road, Suite 100 Indianapolis, IN 46240 317-659-3232 Emergency Contact Information City of Carmel Fire Department: 317-571-2600 City of Carmel Department of Storm Water Management: 317-571-2441 Indiana Department of Environmental Management: 317-232-8603 Inspection & Maintenance It is the responsibility of the BMP Owner to operate and maintain the installed BMPs, including routine monthly and annual inspections. The BMP Owner is responsible of all costs associated with the BMP inspections and repairs. Maintenance responsibilities shall remain in effect for the life of the BMP. Inspections must be documented on the inspection form included in Appendices. An inspection report must be submitted to the City of Carmel on an annual basis, the first being due one (1) year after the completion of construction. The report should include the deficiencies found during the inspection, if any, and how they were addressed. If the inspection report is not received within a month of its due date or if the report is not comprehensive including all of the deficiencies and how they were addressed the Owner will be subject to enforcement by the City of Carmel. The City of Carmel and/or a representative may inspect the BMPs at any time. If the inspector finds deficiencies he/she will contact the Owner with a recommended repair along with an allowable time frame to complete the repair. If the repair is not completed to standards or within the allowable time frame the City of Carmel has the right to perform the repairs and invoice the BMP owner for all costs associated with the work. See Appendix B for BMP Description as well as Inspection and Maintenance Requirements. See Appendix C for Maintenance and Management Inspection Checklist. BMP Description The Best Management Practice (BMP) structures for this project are the proposed Dry Ponds on the east side of the property and one (1) Mechanical Water Quality Unit (Aqua-Swirl AS-8) located within the project. For the dry ponds, bottom vegetation provides erosion control and sediment entrapment. The bottom of each dry pond will have native vegetation. The Water Quality Unit (at diversion manhole STR 115) structure is located at the southeast corner of the northeastern dry detention pond. The Water Quality Unit will remove sediment, floatables, oils, etc. from the stormwater prior to it reaching the Dry Pond. DRY POND MAINTENANCE Activity Schedule • Inspect for erosion along pond surfaces. Two times per year • Inspect for embankment damage. • Monitor sediment accumulation in the basin. • Check operation of inlet and outlet structures and remove accumulated debris. Annually • Restore dead or damaged ground cover via sodding or seeding. As needed (at a minimum of annually) • Monitor sediment accumulations, and remove when dry detention basin storm water storage volume is reduced 25 percent. As needed (possibly every 10 years) • Remove litter and debris from basin inlet and outlet. Standard monthly maintenance Maintenance Narrative Maintenance responsibilities shall remain in effect for the life of the BMP. After an initial establishment period, the BMP is expected to develop into a system requiring little or no vegetation maintenance. Precautionary measures must be taken to prevent invasive species from establishing. These species should be either physically removed or treated with herbicide by qualified plant maintenance professional. Physical removal is strongly preferred above the application of herbicide. If herbicide is used, it must be applied by State Chemists Office approved applicators and any application must be approved by the City of Carmel Utility Department prior to application. Replant or reseed vegetation when damaged, vandalized or removed in compliance to original planting specifications. The infiltration trench will be relatively maintenance free, but the surface layer must undergo maintenance if areas of ponding occur that indicate clogging. Mowing Plan The areas outside of native vegetation are turf grass and shall be maintained at a minimum height of four (4) inches to control weeds. Not more than ½ of the grass leaf shall be removed by the initial cutting or subsequent cutting. Do not mow any live native plant area. Fertilizer No fertilizer is to be used unless soil testing has found specific deficiencies in nutrients. AQUA-SWIRL MAINTENANCE AquaShield 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. See Work sheets attached to this manual. Right-of-Entry Agreement This Operation and Maintenance Manual is submitted to the City with the intent to ensure the longevity and adequate functioning of the Dry Pond and Mechanical Water Quality Unit owned by Lennar Homes of Indiana, Inc. By submitting this Operation and Maintenance Manual to City of Carmel with plans to construct said BMPs, the BMP owner noted above grants personnel from the City of Carmel the right to enter the development to inspect and maintain the BMP. The BMP owner noted above agrees to follow and abide by the inspection schedule and maintenance activities listed in this manual. The BMP owner noted above is responsible for any additional maintenance and/or repair activities to maintain the function and longevity of the BMP(s). _______________________________ ______________________________ Owner Signature: Date _______________________________ Printed STATE OF INDIANA ) ) SS: COUNTY OF ) BEFORE ME, the undersigned, a Notary Public in and for said County and State, personally appeared Owners,/Agent, subscribed and sworn before me this day of , . County of Residence Signature Commission Expiration Date Printed Name 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: ___________________________________________________ ___________________________________________________ ___________________________________________________ _______________________________ ________________________ 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 Appendix A BMP Location Maps 0 1,000 2,000 3,000Graphic Scale (Feet) 1 inch = 2,000 feet Sources: Esri, HERE, DeLorme, USGS, Intermap, INCREMENT P,NRCan, Esri Japan, METI, Esri China (Hong Kong), Esri Korea, Esri(Thailand), MapmyIndia, NGCC, © OpenStreetMap contributors, and theGIS User Community Ê Monon Crossing Townhomes Aerial Location Map Carmel, IndianaMay 2019 )))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))) ) ) ) ) ) ))))))))))))))))))))))))))))) ) ) ) ) ) ) ) ) ) ))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))) ) ) ) ) ) ) ) ) ) ) ) ) )))))) ) ) ))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))) ) ))))))))))))))))))))))35' STR #115 DIVERSION MANHOLE AQUASWIRL AS-8 BMP OUTLET CONTROL STRUCTURE DRY DETENTION POND BMP COMMON AREA IS A BMP EASEMENT COMMON AREA IS A BMP EASEMENT CARMEL, IN 12/18/2019 BMP O&M EXHIBIT MONON CROSSING TOWNHOMES 0' (IN FEET) GRAPHIC SCALE 40'80'120' DENOTES NATIVE BOTTOM VEGETATION Appendix B BMP Description Maintenance and Inspection Requirements Stormwater Technical Standards Manual PC 103-2 July 2006 REFERENCES 1. Camp, Dresser and McKee, Inc., Larry Walker Associates, 1993. California Best Management Practices - Municipal, California State Water Resources Council Board, Alameda, CA. 2. GKY and Associates, Inc. June 1996. Evaluation and Management of Highway Runoff Water Quality, Publication No. FHWA-PD-96-032. Prepared for: US Department of Transportation, Federal Highway Administration. Washington, DC. 3. K. H. Lichten, June 1997. Compilation of New Development Stormwater Treatment Controls in the San Francisco Bay Area, Bay Area Stormwater Management Agencies Association, San Francisco, CA. 4. Low-Impact Development Design Manual, November 1997. Department of Environmental Resources, Prince George’s County, MD 5. T. R. Schueler, 1987. Controlling Urban Runoff: A Practical Manual for Planning and Designing Urban BMPs, Department of Environmental Programs, Metropolitan Washington Council of Governments, Washington, DC. 6. Ventura Countywide Stormwater Quality Management Program, Draft BMP DD: Extended Dry Detention Basins, June 1999. Ventura, CA. 7. G. K. Young and F. Graziano, 1989. Outlet Hydraulics of Extended Detention Facilities, Northern Virginia Planning District Commission, Annandale, VA. 8. Manual for the Standard Urban Stormwater Mitigation Plan (SUSMP),Los Angeles County Department of Public Works, September 2002. Figure PC-103A Typical Extended Dry Detention Components (SUSMP, 2002) Page 4 of 14 © AquaShieldTM, Inc. 2014. All rights reserved. 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. Phone (888) 344-9044 Fax (423) 826-2112 www.aquashieldinc.com Aqua-Swirl Concentrator Model AS-8 Horseshoe HDPE Standard Detail AS-8 STD 03/25/15 Scale: Drawn By: Document: Date: JCW 1:30 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\IURPRU 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. Soil 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 Concrete8" [203 mm] Gravel Backfill Gravel Backfill 119" [3023 mm] 119" [3023 mm]InletVent 106 3/4" [2711 mm] A 18" [457 mm] OD Max Plan View Pipe coupling by Contractor. 12" [305 mm] long Stub-out by Manufacturer. Arched Baffle Octagonal Base Plate Structural Rail 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 Riser Vent Swirl Inlet Structural Rail 114" [2896 mm] 68" [1727 mm] Section A-A Phone (888) 344-9044 www.aquashieldinc.com Arched Baffle Backfill (Sand or Crushed Stone) Bedding Undisturbed Soil 12" [305 mm] 24" [610 mm] 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) 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 Gravel Backfill Concrete Paving 3" [76 mm] Typ. 12" [305 mm]12" [305 mm] 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.OutletA 18" [457 mm] OD Max Pipe coupling by Contractor. 12" [305 mm] long Stub-out by Manufacturer. 78" [1981 mm] DRY POND OUTLET CONTROL STRUCTURE (STR.#103) WATER QUALITY DIVERSION STRUCTURE #115 MONON CROSSING TOWNHOMES CARMEL, IN OCTOBER 1, 2019 Appendix C Maintenance and Management Inspection Checklist City of Indianapolis Page 7-15 Stormwater Specifications Manual January 2011 - FINAL Stormwater Pond 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 Embankment and Emergency Spillway (Inspect annually and after major storms) 1. Vegetation 2. Erosion on embankment 3. Animal burrows 4. Cracking, bulging or sliding of dam A. Location: B. Describe 5. Drains clear and functioning 6. Leaks or seeps on embankment A. Location B. Describe 7. Slope protection failure 8. Emergency spillway clear of obstructions 9. Other (describe) FIGURE 702-05: Private Operation, Maintenance & Management – Stormwater Ponds City of Indianapolis Page 7-16 Stormwater Specifications Manual January 2011 - FINAL Maintenance Item Satisfactory/ Unsatisfactory Comments Riser and Principal spillway (Inspect annually) Circle Type: Reinforced concrete, corrugated pipe, masonry 1. Low flow orifice blocked 2. Trash rack A. debris removal needed B. corrosion noted 3. Excessive sediment buildup in riser 4. Concrete/Masonry condition A. cracks or displacement B. spalling 5. Metal pipe condition 6. Control Valve operational 7. Pond drain valve operational 8. Outfall channels functioning 9. Other (describe) Permanent Pool (Inspect monthly) 1. Undesirable vegetative growth 2. Floatable debris removal needed 3. Visible pollution 4. Shoreline problem 5. Other (describe) City of Indianapolis Page 7-17 Stormwater Specifications Manual January 2011 - FINAL Maintenance Item Satisfactory/ Unsatisfactory Comments Sediment Forebays 1. Sedimentation noted 2. Sediment cleanout needed (over 50% full) Other (Inspect monthly) 1. Erosion at outfalls into pond 2. Headwalls and endwalls 3. Encroachment into pond or easement area 4. Complaints from residents 5. Public hazards (describe) Additional Comments Actions to be taken: Timeframe: Page 7 of 14 © AquaShieldTM, Inc. 2014. All rights reserved. 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 Page 8 of 14 © AquaShieldTM, Inc. 2014. All rights reserved. Sediment inspection using a stadia rod in a single chamber Maintenance trigger for Aqua-Swirl® Models AS- 3 through AS-13 occurs when sediment pile is 42-48 inches below water surface. Maintenance trigger for Aqua-Swirl® Model AS-2 occurs when sediment pile is 30 to 32 inches below water surface. 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. The maintenance trigger for Aqua-Swirl® Models AS-3 through AS-13 occurs when the sediment pile is within 42 to 48 inches of the standing water surface. For the Aqua-Swirl® Model AS-2, maintenance is needed when the top of the sediment pile is measured to be 30 to 32 inches below the standing water surface. 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. 42-48” 42-48” AS-2: 30-32” Page 9 of 14 © AquaShieldTM, Inc. 2014. All rights reserved. Vacuum truck quickly cleans the Aqua-Swirl® from a single chamber 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 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 Page 10 of 14 © AquaShieldTM, Inc. 2014. 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. For Aqua-Swirl® Models AS-3 through AS-13, schedule cleaning if value in Step #2 is 48 to 42 inches or less. 4. For Aqua-Swirl® Model AS-2, schedule cleaning if value in Step #2 is 32 to 30 inches or less. Page 11 of 14 © AquaShieldTM, Inc. 2014. 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 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 Page 12 of 14 © AquaShieldTM, Inc. 2014. All rights reserved. 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 Structural damage: Yes No Where: Page 13 of 14 © AquaShieldTM, Inc. 2014. All rights reserved. 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). Page 14 of 14 © AquaShieldTM, Inc. 2014. 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. 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