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HomeMy WebLinkAboutO&M Manual 11-22-19 -i- Gramercy East Apartments November 2019 TABLE OF CONTENTS 1.0 OWNER CONTACT INFORMATION ..........................................................................1 2.0 INTRODUCTION..............................................................................................................1 3.0 STORMWATER & DETENTION MAINTENANCE ...................................................1 4.0 WATER QUALITY SYSTEM MAINTENANCE ..........................................................2 4.1 Water Quality Devices Inspections ......................................................................... 2 5.0 SUMMARY ........................................................................................................................4 APPENDICES Appendix A – Sample Inspection Logs Appendix B – BMP Map & Details Appendix C – Aqua Swirl Manufacturers Recommendations 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 -1- Gramercy East Apartments November 2019 1.0 OWNER CONTACT INFORMATION Owner’s Name: Buckingham Companies C/O: Owner’s Address: 941 N. Meridian St. Indianapolis, Indiana 46204 Business Phone: 317-974-1234 The storm sewer improvements will be maintained and operated by Buckingham Companies. 2.0 INTRODUCTION The City of Carmel Stormwater Technical Manual (CSTM) provides a variety of options for improving water quality using Best Management Practices (BMP). In order to maintain water quality within the BMP, light maintenance activities will be needed to manipulate hydrology. This document defines responsibilities for operating, inspecting and maintaining the stormwater system at the Gramercy apartment complex. 3.0 STORMWATER & DETENTION MAINTENANCE Storm sewer pipes, detention pond, and outlet control weir structure should be regularly maintained and cleaned of debris. All piping should be inspected monthly and after each rainfall event, especially during the autumn season. Outlet control structures 101 & 104 should be inspected more regularly when falling leaves are present. Refer to Appendix B for Maintenance Map and Details. Sample inspection logs are included in Appendix C. Disposal of all sediment must be in accordance with all federal, state and local requirements. Additionally, Buckingham Companies will perform annual compliance inspections of all permanent BMPs. -2- Gramercy East Apartments November 2019 4.0 WATER QUALITY SYSTEM MAINTENANCE The City of Carmel reserves the right to enter the property at any time to inspect the operation of any Best Management Practices (BMP) onsite. The following is a list and description of the three BMPs at the Gramercy: · Aqua-Swirl XC-9 & XC-11. · Wet Pond: Per the CSTM “The wet pond is a facility which removes sediment, Biochemical Oxygen Demand (BOD), organic nutrients, and trace metals from stormwater runoff. This is accomplished by slowing down stormwater using an in-line permanent pool or pond affecting settling of pollutants. The wet pond is similar to a dry pond, except that a permanent volume of water is incorporated into the design. The drainage area should be such that an adequate base flow is maintained in the pond. Biological processes occurring in the permanent pond pool aid in reducing the amount of soluble nutrients present in the water, such as nitrate and ortho-phosphorus (Schueler, 1987).” See Appendix B for the location and details of all infrastructure and water quality BMPs. 4.1 WATER QUALITY DEVICES INSPECTIONS The BMPs require certain items to be inspected on a monthly or annual basis during the existence of the BMPs. This inspection is the responsibility of Buckingham Companies. More frequent inspections may need to take place during periods of heavy rainfall. For each drainage system listed below, the following details shall be inspected monthly and after major rainfall events (>1 inch in 24 hours). Also refer to sample inspection logs in Appendix D. · Underdrains– Remove all debris to ensure openings are clear and operating properly. Cleanouts (C.O.) at the end of underdrain pipes should be utilized for debris removal. Water and sediment from cleaning procedures should NOT be dumped into a sanitary sewer. · BMP inlets and outlets (piping) – Remove all debris to ensure openings are clear and operating properly. The maximum sediment depth should be no more than ¼ of the pipe diameter and up to a maximum depth of 6”. Check for rip rap stone displacement and erosion of the apron surrounding pipe end section. Repair immediate failure. Water and sediment from cleaning procedures should NOT be dumped into a sanitary sewer. · BMP Wet Pond – o Vegetation & forebays – This area includes all turf vegetation within the boundary of the BMPs. Some species of plants are considered invasive and should be eradicated. -3- Gramercy East Apartments November 2019 Species such as reed canary grass (Phalaris arundinacea), purple loosestrife (Lythrum salicaria), common reed (Phragmites australis), and cattails (Typha spp.) would be considered fast colonizing and invasive species. Remove as necessary. o Pipes – attempt to clear by flushing with water or by pipe cleaner rods o Outlet Orifices – keep screens clean, vegetation away from outlet, watch for excessive discharge of silt or sand. o Rip Rap Erosion Protection – Check for displacement of riprap material, filter fabric, slumping, and erosion along the edges, especially on the down-slope side o This area includes all turf vegetation within the boundary of the BMPs. Some species of plants are considered invasive and should be eradicated. Species such as reed canary grass (Phalaris arundinacea), purple loosestrife (Lythrum salicaria), common reed (Phragmites australis), and cattails (Typha spp.) would be considered fast colonizing and invasive species. Remove as necessary. See desired planting list & schedule in Appendix C. A protective cover of vegetation shall be established on all exposed surfaces of the pond embankment, spillway, borrow and spoil areas and to a minimum of 50 feet on all sides of pond and 100 feet upstream of the pool area. Open areas to be vegetated will be limed, fertilized, seeded and mulched according to the construction specification. No woody vegetation shall be planted on or within 25 feet of the pond embankment or spillway. See Appendix B for the location and details of all infrastructure and water quality BMPs. If these maintenance guidelines are not followed, the BMP’s may fail to attain water quality objectives set forth in the regulations. The BMP shall be owned by the developer/property owner; any and all maintenance and repair activities shall be paid for by the owner. Documentation of all repairs should be kept on file by the owner for review by City of Carmel inspectors. Sample inspection logs are included in Appendix C. Right of Entry - The City of Carmel may inspect the premises at any time necessary to determine the functionality of any BMPs onsite. City of Carmel Note- The BMPs shall be owned by the developer/property owner; any and all maintenance and repair activities shall be paid for by Buckingham Companies. The requirements of the O&M Manual shall remain in effect regardless of change in ownership of the development. Furthermore, it shall be the responsibility of the BMP owner to provide the O&M Manual to future parties who will assume responsibility for the operation and maintenance of the post-construction storm water quality measures. -4- Gramercy East Apartments November 2019 Buckingham Companies will perform annual compliance inspections of all onsite BMPs and provide the reports to City of Carmel Engineering Department. 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. Refer to Agreement in Appendix A. 5.0 SUMMARY The objective of the operation and maintenance manual is to allow the owner of the storm management system to manage the system to the City of Carmel specifications. The City requires minimal information for their records: 1. Maintenance agreement. The agreement requires the owner to comply with the maintenance set forth in the manual. 2. Monthly and annual data sheets and repair documentation must be kept on site for the City Inspectors to review during their annual inspection of the site. APPENDIX A SAMPLE INSPECTION LOGS Post-Construction BMP Inspection Checklist Detention pond Stormwater Ordinance Technical Standards Detention Pond O&M 1 of 2 Detention Pond Operation, Maintenance, and Management Inspection Checklist Project: ___________________________________________________________________________________ Location: ___________________________________________________________________________________ Date: _________________________________________ Time: ____________________________ Inspector: _________________________________________ Title: ____________________________ Signature: ____________________________________________________ Maintenance Item Satisfactory/ Unsatisfactory Comments 1. Embankment and emergency spillway Healthy vegetation with at least 85% ground cover. No signs of erosion on embankment. No animal burrows. Embankment is free of cracking, bulging, or sliding. Embankment is free of woody vegetation. Embankment is free of leaks or seeps Emergency spillway is clear of obstructions. Vertical/horizontal alignment of top of dam “As- Built” 2. Riser and principal spillway Low flow outlet free of obstruction. Trash rack is not blocked or damaged. Riser is free of excessive sediment buildup Outlet pipe is in good condition. Control valve is operational Outfall channels are stable and free of scouring. Post-Construction BMP Inspection Checklist Detention pond Stormwater Ordinance Technical Standards Detention Pond O&M 2 of 2 Maintenance Item Satisfactory/ Unsatisfactory Comments 3. Permanent Pool (Wet Ponds) No Evidence of undesirable vegetation No accumulation of floating or floatable debris No evidence of shoreline scour or erosion 4. Sediment Forebays Sediment is being collected by forebay(s) Forebay is not in need of cleanout (less than 50% full) 5. Dry Pond Areas Healthy vegetation with at least 85% ground cover. No undesirable woody vegetation Low flow channels clear of obstructions No evidence of sediment and/or trash accumulation 6. Condition of Outfall into Ponds No riprap failures No evidence of slope erosion or scouring Storm drain pipes are in good condition, with no evidence of non-stormwater discharges Endwalls/Headwalls are in good condition APPENDIX B BMP MAP & DETAILS ******************o o o o o o o o oo o oo o oo o oo o oo o oo o oo o oo o o o o o C401C402C404C406C407C403C405SINGLE FAMILYRESIDENTIAL(UNDERCONSTRUCTION)DETENTIONPONDPOOLAREAFUTURETOWNHOMESCOURTYARDBUILDING 'A'BUILDING 'B'WESTBUILDING 'B'EASTFUTURETOWNHOMESFUTURETOWNHOMESFUTURE TOWNHOMES INTERNALGARAGEPARKINGUTILITY NOTE:ADDITIONAL CITY OF CARMEL NOTES:530 E. Ohio Street, Suite G(317) 655-7777 (877) 746-0749Indianapolis, Indiana 4620419108Project Number:Drawing Number:Certified By:Checked ByDrawing Title:Drawn ByIssue DateRevisions:Carmel, Indiana GRAMERCY EASTScope Drawings:11.20.2019JARACHC400-Conceptual Design Only-Subject to ChangeGENERAL DRAINAGE NOTES:OVERALLDRAINAGEPLANNORTH ******************o o oo o oC401C402C404C406C407C403C405SINGLE FAMILYRESIDENTIAL(UNDERCONSTRUCTION)DETENTIONPONDPOOLAREAFUTURETOWNHOMESCOURTYARDBUILDING 'A'BUILDING 'B'WESTBUILDING 'B'EASTFUTURETOWNHOMESFUTURETOWNHOMESFUTURE TOWNHOMESINTERNALGARAGEPARKING FUTURETOWNHOMESFUTURETOWNHOMESDETENTIONPONDINDIANA TRAIL DRIVEKINZER AVE.WET DETENTION POND 1(INTERCONNECTED TO POND 2)257,968 CF(ABOVE N.P.)N.P. = 833.00DRAINAGE SUMMARYPROPOSED LEGEND:UTILITY NOTE:ADDITIONAL CITY OF CARMEL NOTES:530 E. Ohio Street, Suite G(317) 655-7777 (877) 746-0749Indianapolis, Indiana 4620419108Project Number:Drawing Number:Certified By:Checked ByDrawing Title:Drawn ByIssue DateRevisions:Carmel, Indiana GRAMERCY EASTScope Drawings:11.20.2019JARACHC406-Conceptual Design Only-Subject to ChangeDRAINAGEPLANKEY MAPNORTH WET POND BMP SECTIONGENERAL DRAINAGE NOTES:NORTH ******************o o oo o oC401C402C404C406C407C403C405SINGLE FAMILYRESIDENTIAL(UNDERCONSTRUCTION)DETENTIONPONDPOOLAREAFUTURETOWNHOMESCOURTYARDBUILDING 'A'BUILDING 'B'WESTBUILDING 'B'EASTFUTURETOWNHOMESFUTURETOWNHOMESFUTURE TOWNHOMESINTERNALGARAGEPARKINGo o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o oo o oo o oo o oo o o o o o o o o o o o DETENTIONPONDBODNER LANEKINZER AVE.INDIANA TRAIL DRIVEWET DETENTION POND 2(AVOIDING DISTURBANCEOF EX. CULVERT & SWALETO THE SOUTH)167,998 CF(ABOVE N.P.)N.P. = 833.00DRAINAGE SUMMARYPROPOSED LEGEND:UTILITY NOTE:ADDITIONAL CITY OF CARMEL NOTES:530 E. Ohio Street, Suite G(317) 655-7777 (877) 746-0749Indianapolis, Indiana 4620419108Project Number:Drawing Number:Certified By:Checked ByDrawing Title:Drawn ByIssue DateRevisions:Carmel, Indiana GRAMERCY EASTScope Drawings:11.20.2019JARACHC407-Conceptual Design Only-Subject to ChangeKEY MAPDRAINAGEPLANSOUTH WET POND BMP SECTIONGENERAL DRAINAGE NOTES:NORTH STRUCTURE 101 DETAILINLETOUTLETSTRUCTURE 104 DETAILINLETOUTLET530 E. Ohio Street, Suite G(317) 655-7777 (877) 746-0749Indianapolis, Indiana 4620419108Project Number:Drawing Number:Certified By:Checked ByDrawing Title:Drawn ByIssue DateRevisions:Carmel, Indiana GRAMERCY EASTScope Drawings:11.20.2019JARACHC803-Conceptual Design Only-Subject to ChangeSITE DETAILS 2733 Kanasita Drive, Suite 111, Chattanooga, TN 37343Phone (888) 344-9044 Fax (423) 826-2112www.aquashieldinc.comStructure #:Drawn By:Scale:Date:6/26/2019RvwedRvw. DateU.S. Patent No. 6524473 and other Patent PendingAqua-Swirl XCeleratorAs ShownOFloresAqua-Swirl Stormwater Treatment SystemStandard DetailXC-9 CCW STDXC-9 STDAqua-Swirl Polymer Coated Steel (PCS)Stormwater Treatment System12 in[305 mm]Manhole Frame & Cover DetailFor Non-Traffic Areas OnlyNTS4 in[1219 mm] Min.Gravel BackfillConcreteWrap Compressible ExpansionJoint Material to a minimum1/2-inch [13 mm] thickness aroundtop of riser to allow transfer ofinadvertent loading frommanhole cover to concrete slab.RiserSoilCoverFrame1/2 in[13 mm]1/2 in[13 mm]Place small amount ofconcrete [3,000 psi [20MPa] (min)] to supportand level manhole frame.DO NOT allow manholeframe to rest upon riser.Backfill (90%Proctor Density)8 in[203 mm]4 1/2 in[114 mm]Unless other traffic barriers are present,bollards shall be placed around access riser(s)in non-traffic areas to prevent inadvertentloading by maintenance vehicles.Manhole Frame & Cover DetailFor Traffic Loading AreasNTSCoverFrame48 in[1219 mm] Min.Backfill (90%Proctor Density)3,000 psi [20 MPa](min) Concrete#4 [13 mm] Rebar@ 6 in [152 mm]Each Way30 in [762 mm]Riser1/2 in[13 mm]4 1/2 in[114 mm]14 in[356 mm]1/2 in [13 mm] ThickExpansion JointMaterialIf traffic loading (HS-25) is required or anticipated, a 4-foot [1.22 m]diameter, 14-inch [356 mm] thick reinforced concrete pad must beplaced over the Stormwater Treatment System Riser to support andlevel the manhole frame, as shown. The top of riser pipe must bewrapped with compressible expansion joint material to a minimum1/2-inch [13 mm] thickness to allow transfer of wheel loads frommanhole cover to concrete slab. Manhole cover shall bear on concreteslab and not on riser pipe. The concrete slab shall have a minimumstrength of 3,000 psi [20 MPa] and be reinforced with #4 [13 mm]reinforcing steel as shown. Minimum cover over reinforcing steel shallbe 1-inch [25 mm]. Top of manhole cover and concrete slab shall belevel with finish grade.Please see accompanied Aqua-Swirl specification notes. See SitePlan for actual System orientation. Approximate dry (pick) weight:5900 lbs [2700 kg].Backfill shall extend at least 18inches [457 mm] outward fromSwirl Concentrator and for thefull height of the SwirlConcentrator (including riser)extending laterally toundisturbed soils. (See MHDetail Below)BackfillBeddingUndisturbed soil18 in[457 mm]6 in[152 mm]11As an alternative, 42 in [1067 mm] diameter, HS-20/25rated precast concrete rings may be substituted. 14 in[356 mm] thickness must be maintained.XC-9 inlet/outlet pipe size ranges up to 48 in [1219 mm].XC-9 chamber height may vary up to 178 in [4521 mm],depending on inlet/outlet pipe size.Orientation may vary from a minimum of 90° to amaximum of 180°. Clockwise or counterclockwiseorientation as needed.2332Plan ViewSCALE 1:50 120 in[3048 mm] 120 in[3048 mm] n48 in[1219 mm] n48 in[1219 mm]2Octagonal Base Plate Ø108 in[Ø2746 mm]Elevation ViewSCALE 1:50 106 in[2692 mm] 178 in[4521 mm][1219 mm][1092 mm] 5 MH Frame[127 mm] n30 in[762 mm]Band Couplerby Manufacturer.(as needed)RiserManhole Frame andCover by Manufacturer.(See Details)Rim elevations tomatch finish grade.Pipe couplingby Contractor.12 in [305 mm]long Stub-outby Manufacturer.44el. VariesInlet/Outlet Invertel. Variesel. VariesGrade (Rim) el. VariesPipe couplingby Contractor.12 in [305 mm]long Stub-outby Manufacturer.180° n108 in[2743 mm]Projected ViewSCALE 1:80Optional inletorientations available(See note 4)2733 Kanasita Drive, Suite 111, Chattanooga, TN 37343Phone (888) 344-9044 Fax (423) 826-2112www.aquashieldinc.comStructure #:Drawn By:Scale:Date:6/26/2019RvwedRvw. DateU.S. Patent No. 6524473 and other Patent PendingAqua-Swirl XCeleratorAs ShownOFloresAqua-Swirl Stormwater Treatment SystemStandard DetailXC-11 CCW STDXC-11 STDAqua-Swirl Polymer Coated Steel (PCS)Stormwater Treatment System12 in[305 mm]Manhole Frame & Cover DetailFor Non-Traffic Areas OnlyNTS4 in[1219 mm] Min.Gravel BackfillConcreteWrap Compressible ExpansionJoint Material to a minimum1/2-inch [13 mm] thickness aroundtop of riser to allow transfer ofinadvertent loading frommanhole cover to concrete slab.RiserSoilCoverFrame1/2 in[13 mm]1/2 in[13 mm]Place small amount ofconcrete [3,000 psi [20MPa] (min)] to supportand level manhole frame.DO NOT allow manholeframe to rest upon riser.Backfill (90%Proctor Density)8 in[203 mm]4 1/2 in[114 mm]Unless other traffic barriers are present,bollards shall be placed around access riser(s)in non-traffic areas to prevent inadvertentloading by maintenance vehicles.Manhole Frame & Cover DetailFor Traffic Loading AreasNTSCoverFrame48 in[1219 mm] Min.Backfill (90%Proctor Density)3,000 psi [20 MPa](min) Concrete#4 [13 mm] Rebar@ 6 in [152 mm]Each Way30 in [762 mm]Riser1/2 in[13 mm]4 1/2 in[114 mm]14 in[356 mm]1/2 in [13 mm] ThickExpansion JointMaterialIf traffic loading (HS-25) is required or anticipated, a 4-foot [1.22 m]diameter, 14-inch [356 mm] thick reinforced concrete pad must beplaced over the Stormwater Treatment System Riser to support andlevel the manhole frame, as shown. The top of riser pipe must bewrapped with compressible expansion joint material to a minimum1/2-inch [13 mm] thickness to allow transfer of wheel loads frommanhole cover to concrete slab. Manhole cover shall bear on concreteslab and not on riser pipe. The concrete slab shall have a minimumstrength of 3,000 psi [20 MPa] and be reinforced with #4 [13 mm]reinforcing steel as shown. Minimum cover over reinforcing steel shallbe 1-inch [25 mm]. Top of manhole cover and concrete slab shall belevel with finish grade.Please see accompanied Aqua-Swirl specification notes. See SitePlan for actual System orientation. Approximate dry (pick) weight:11500 lbs [5200 kg].Backfill shall extend at least 18inches [457 mm] outward fromSwirl Concentrator and for thefull height of the SwirlConcentrator (including riser)extending laterally toundisturbed soils. (See MHDetail Below)BackfillBeddingUndisturbed soil18 in[457 mm]6 in[152 mm]11As an alternative, 42 in [1067 mm] diameter, HS-20/25rated precast concrete rings may be substituted. 14 in[356 mm] thickness must be maintained.XC-11 inlet/outlet pipe size ranges up to 48 in [1219 mm].XC-11 chamber height may vary up to 200 in [5080 mm],depending on inlet/outlet pipe size.Orientation may vary from a minimum of 90° to amaximum of 180°. Clockwise or counterclockwiseorientation as needed.2332Plan ViewSCALE 1:60 144 in[3658 mm] 144 in[3658 mm] n48 in[1219 mm] n48 in[1219 mm]2Octagonal Base Plate Ø132 in[Ø3358 mm]Elevation ViewSCALE 1:60 128 in[3251 mm] 200 in[508 mm][1524 mm][1397 mm] 5 MH Frame[127 mm] n30 in[762 mm]Band Couplerby Manufacturer.(as needed)RiserManhole Frame andCover by Manufacturer.(See Details)Rim elevations tomatch finish grade.Pipe couplingby Contractor.12 in [305 mm]long Stub-outby Manufacturer.44el. VariesInlet/Outlet Invertel. Variesel. VariesGrade (Rim) el. VariesPipe couplingby Contractor.12 in [305 mm]long Stub-outby Manufacturer.180° n132 in[3353 mm]Projected ViewSCALE 1:100Optional inletorientations available(See note 4)530 E. Ohio Street, Suite G(317) 655-7777 (877) 746-0749Indianapolis, Indiana 4620419108Project Number:Drawing Number:Certified By:Checked ByDrawing Title:Drawn ByIssue DateRevisions:Carmel, Indiana GRAMERCY EASTScope Drawings:11.20.2019JARACHC804-Conceptual Design Only-Subject to ChangeSITE DETAILSDETAIL - RIP RAP APRONAA2'10'8"8"8"8"1' SUMP 1'DETAIL - STR 235 TRENCH DRAINSECTION A-A4"DEPTH VARIES2'-2"8"8"8"8"2'6"2'8"8" APPENDIX C AQUA SWIRL MANUFACTURERS RECOMMENDATIONS © AquaShieldTM, Inc. 2019. All rights reserved. Version_0419 Aqua-Swirl® XCelerator Stormwater Treatment System Inspection and Maintenance Manual for New Jersey Department of Environmental Protection (NJDEP) 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 © AquaShieldTM, Inc. 2019. All rights reserved. Version_0419 Floatable trash & debris in the Aqua-Swirl® Aqua-Swirl® XCelerator Stormwater Treatment System The Aqua-Swirl® XCelerator Stormwater Treatment System (Aqua-Swirl® XCelerator) is a vortex-type hydrodynamic separator designed and supplied by AquaShieldTM, Inc. (AquaShieldTM). Aqua-Swirl® XCelerator technology removes pollutants including suspended solids, debris, and floatables from stormwater runoff. Both treatment and storage are accomplished in the single swirl chamber without the use of multiple or hidden, blind access chambers. System Operation The treatment operation begins when stormwater enters the Aqua-Swirl® XCelerator 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® XCelerator 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. © AquaShieldTM, Inc. 2019. All rights reserved. Version_0419 Aqua-Swirl® XCelerator 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® XCelerator 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. Inspection The Aqua-Swirl® XCelerator 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 during construction and for the first year of operation to develop an appropriate schedule of maintenance. The Aqua-Swirl® XCelerator should be inspected and cleaned at the end of construction regardless of whether it has reached its sediment storage capacity and/or other captured materials. 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 once per year. Maintenance The Aqua-Swirl® XCelerator 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 floatable debris can be directly observed and maintained through the manhole access provided directly over the swirl chamber. Inspection Procedure To inspect the Aqua-Swirl® XCelerator, 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 © AquaShieldTM, Inc. 2019. All rights reserved. Version_0419 Sediment inspection using a stadia rod information plate affixed inside the access riser which provides our contact information, the Aqua-Swirl® XCelerator model size, and serial number. The only tools needed to inspect the Aqua-Swirl® XCelerator system are a flashlight and a measuring device such as a stadia rod or pole. Given the easy and direct accessibility provided, floating trash 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 a nd to the surface of the water. AquaShieldTM recommends that the units be cleaned when sediment depth reaches 6 inches, representing 50% sediment storage capacity. The full sediment storage depth in the Aqua-Swirl® XCelerator is 12 inches. 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. Aqua-Swirl® XCelerator Cleanout Procedure Cleaning the Aqua-Swirl® XCelerator is simple and quick. Floatable trash 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® XCelerator 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 (blind) access chambers in the Aqua-Swirl® XCelerator there are no restrictions to impede on-site maintenance tasks. ” © AquaShieldTM, Inc. 2019. All rights reserved. Version_0419 Vacuum (vactor) truck quickly cleans the single open access swirl chamber 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® XCelerator and any external structures (e.g, bypass features) be handled and disposed in full accordance with any applicable local and state requirements. Aqua-Swirl® XCelerator Inspection and Maintenance Work Sheets on following pages © AquaShieldTM, Inc. 2019. All rights reserved. Version_0419 Aqua-Swirl® XCelerator 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 Trash and Debris 1. Remove manhole lid to expose liquid surface of the Aqua-Swirl® XCelerator. 2. Remove floatable debris with basket or net if any present. 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 12 inches for all models. Consult system shop drawing for treatment chamber depth as measured from the inlet pipe invert to base of the unit. 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. © AquaShieldTM, Inc. 2019. All rights reserved. Version_0419 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, trash, 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® XCelerator. 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® XCelerator 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® XCelerator every three (3) months and clean the system as needed. The Aqua-Swirl® XCelerator 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 unit(s) 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 system 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® XCelerator 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 unit 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® XCelerator is inspected. Maintenance should be performed on bypass structures as needed. © AquaShieldTM, Inc. 2019. All rights reserved. Version_0419 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: 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: © AquaShieldTM, Inc. 2019. All rights reserved. Version_0419 NOTES Additional Comments and/or Actions To Be Taken Time Frame ATTACHMENTS  Attach site plan showing Aqua-Swirl® XCelerator location.  Attach detail drawing showing Aqua-Swirl® XCelerator dimensions and model number.  If a diversion configuration is used, attach details showing basic design and elevations (where feasible). © AquaShieldTM, Inc. 2019. All rights reserved. Version_0419 Aqua-Swirl® XCelerator 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® XCelerator 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® XCelerator 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® XCelerator 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® XCelerator 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 system should be cleaned annually regardless of whether it reaches its full sediment or floatable pollutant capacity.