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HomeMy WebLinkAboutO&M Manual PCW003O &M MANUAL Prime Car Wash 9805 North Michigan Road Carmel, Indiana 46032 Job #: PCW.003 Date: 10/16/2013 Prepared by: Eric A. Gleissner, P.E. Reviewed by: Brian Cross, P.E. Civil Site GROUP, INC 643 Massachusetts Avenue Suite 200 Indianapolis, IN 46204 Phone: 317- 423 -3305 Fax: 317- 423 -3306 TABLE OF CONTENTS Section 1: Manual A. About the BMP B. Contact Information for BMP owner C. BMP Owner Acknowledgement Agreement D. Right —of -Entry Statement E. BMP Description & Operation F. Maintenance Requirements G. Site Drawings H. Inspection Report I. Spills, Reporting, Containment & Response Per 327 IAC 2 -6.1 -1 Section 11: Appendix A. BMP Owner Acknowledgment Agreement B. Right -of -Entry Statement C. Site Drawings D. Stormwater Quality Data E. Maintenance Guidelines F. Inspection Report SECTION 1: MANUAL A. About the BMP A Water quality BMP is a device or methodology used to remove total suspended solids (TSS) and free oil (TPH) from storm water run -off. This device or methodology, with proper maintenance, will filter the storm water run -off, to help prevent downstream contamination of streams and waterways. B. Contact Information for the BMP Owner Prime Car Wash (ATTN: Brent Oakley) ii. Address: 14375 Mundy Drive, Noblesville, IN 46060 iii. Phone: 317-341-4719 iv. Email: brentoakley ©primecarwash.com C. BMP Owner Acknowledgement Agreement See appendix A. D. Right -of -Entry Statement Allows the City of Carmel to inspect and maintain the BMP structure as necessary. See appendix B. E. BMP Description & Operation The stormwater runoff from the site will discharge into a Stormwater Quality Treatment unit manufactured by Hydro - International known as a Downstream Defender® Storm Water Quality Unit. This hydrodynamic separation method will capture the required Total Suspended Solids (TSS) along with floating debris and hydrocarbons prior to discharging into the detention pond. We have selected a 4- foot diameter model with a maximum Treatment Flow Rate for this sized structure 3.0 cfs. The calculated peak discharge treatment rate for the proposed site improvements routed through the 4 -foot diameter models is 1.08 cfs. Downstream Defender® is an approved Stormwater Quality Unit (SQU) in an off - line configuration and meets all the requirements of the City of Carmel Stormwater Technical Standard Manual; therefore, the Downstream Defender® Storm Water Quality Unit is an ideal fit for this development. The Connecting /Diversion Structure with Sump into the Downstream Defender should be periodically cleaned and maintained as a BMP. A secondary BMP being utilized for this project is a Snout® oil /water separator. A Snout® will be proposed on the BMP diversion structure with a 2' sump prior to discharging into the dry detention basin. Although the downstream wet detention pond does not meet all of the design standards of a BMP, proper maintenance of the pond will provide a Post - Construction storm water quality benefit. For more information concerning the BMP locations /structures, see appendix C. F. Maintenance Requirements See appendix E ii. See appendix E See appendix E iv. See appendix E v. Property Management Company — Convenience Centers, LLC G. Site Drawings See appendix C ii. See appendix C See appendix C iv. See appendix C H. Inspection Reports The first inspection 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. See appendix D for inspection form. A written yearly inspection report must be submitted to: City Hall — Department of Engineering Attn: Stormwater Administrator One Civic Square Carmel, IN 46032 I. Spills, Reporting, Containment & Response Per 327 IAC 2 -6.1 -1 327 IAC 2 -6.1 -1 Applicability Authority: IC 13- 14 -8 -7 Affected: IC 13 -11 -2; IC 13 -18 -1; IC 13 -18 -3; IC 13 -18 -8; IC 13 -18 -17 Sec. 1. This rule applies to the reporting and containment of, and the response to those spills of hazardous substances, extremely hazardous substances, petroleum, and objectionable substances that are of a quantity, type, duration and in a location as to damage the waters of the state. Nothing in this rule is intended to affect reporting or clean -up requirements set forth by other Federal, State, or Local laws. (Water Pollution Control Board; 327 IAC 2- 6.1 -1; filed Feb 25, 1997, 1:00 p.m.: 20 IR 1731; readopted filed Jan 10, 2001, 3:23 p.m.: 24 IR 1518; readopted filed Nov 21, 2007, 1:16 p.m.: 20071219- IR- 327070553BFA) "Spill" means any unexpected, unintended, abnormal, or unapproved dumping, leakage, drainage, seepage, discharge, or other loss of petroleum, hazardous substances, extremely hazardous substances, or objectionable substances. The term does not include releases to impermeable surfaces when the substance does not migrate off the surface or penetrate the surface and enter the soil. Spill Emergency Contact Prime Car Wash ATTN: Brent Oakley 14375 Mundy Drive Noblesville, IN 46060 Cell: (317) 341 -4719 SECTION 11: APPENDIX A. BMP Owner Acknowledgment Agreement 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: PRIME CAR WASH (14375 MUNDY DRIVE, NOBLESVILLE, IN 46060) DOWNSTREAM DEFENDER(STR# BMP); SNOUT WITH SUMP AT STR# 100; CONNECTING /DIVERSION STRUCTURE SUMP Owner Signature BRENT OAKLEY Printed Name STATE OF INDIANA ) SS: COUNTY OF HAMILTON ) Date PRIME CAR WASH Company 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 B. Right -of -Entry Statement RIGHT -OF -ENTRY STATEMENT Prime Car Wash grants permission and allows the City of Carmel and their employees, contracted parties, and constituents the right -of -entry on 9805 North Michigan Road to inspect and maintain the BMPs as noted on the Prime Car Wash construction plans, Project Number PCW.003, Downstream Defender Structure BMP, Snout® Oil /Water Separator on structure 100 with a 2' sump in the structure, as referenced on drawing number C6.0, certified: 9/25/13. C. Site Drawings D. Stormwater Quality Data Basin Name: PR1 Group Name: POST Simulation: 24HR Node Name: PR1 Basin Type: SCS Unit Hydrograph Unit Hydrograph: Uh484 Peaking Fator: 484.0 Spec Time Inc (min): 2.40 Comp Time Inc (min): 2.40 Rainfall File: Scsii -24 Rainfall Amount (in): 1.000 Storm Duration (hrs): 24.00 Status: Onsite Time of Conc (min): 18.00 Time Shift (hrs): 0.00 Area (ac): 1.490 Vol of Unit Hyd (in): 1.001 Curve Number: 96.300 DCIA ( %): 0.000 Time Max (hrs): 12.08 Flow Max (cfs): 1.08 Runoff Volume (in): 0.651 Runoff Volume (ft3): 3521 Diversion Structure Design Pipe Diameter Exiting Diversion Structure (104) Flowing into BMP = 12 inches Cross Sectional Area "A" = 0.79 ft ^2 Min. Overflow Weir Height (Structure 104) = 877.57 ft Stormwater Quality Peak Treatment Flow Rate = 1.08 cfs Pipe BMP to 100 CALCULATED D E S I G N "Q" = CIA PIPE (full) n = 0.013 Pipe length Pipe slope Max Q full Max V full MANHOLE size slope vel. INV out INV in T.C.= 883.50 1.08 12 0.09 = 1.38 8 = 1.250 = 3.98 5.07 = 877.25 = 877.15 Area of Pipe Used by Stormwater Quality Peak Treatment Flow Rate = 0.250 ft ^2 Min. Depth of Flow in Pipe for Stormwater Quality Peak Treatment Flow Rate = 0.32 ft Min. Structure 106 Weir Wall Elevation = 877.57 ft * *SET STRUCTURE 104 WEIR WALL ELEVATION = 877.65' Max Flow Capacity of Pipe Flowing Full (A = 0.79 ftA2) "Qfuii" = 3.98 cfs Required Treatment Flow Capacity of Pipe "Q" = 1.08 cfs Q / Qfull = 0.27 this is a ratio A = (Q / Qfuu) x Afull = 0.213 ft ^2 A = [r^2(c- sino)] / 2 Solve for cp = 137.33 degrees Q= 2 {arcoss[(r- d) /r]} Solve for "d" = 0.32 feet E. Maintenance Guidelines Included Reference Documents Downstream Defender® - Operation & Maintenance Manual Downstream Defender® - Advanced Vortex Separator Downstream Defender® - Handling & Installation Instructions Downstream Defender® - Pipe Connections & Couplings Maintenance Routine Maintenance: In accordance with these requirements, maintenance will occur semi - annually (June & December) or as needed. The BMP owner will also be required to perform any maintenance specified at the City's discretion. The following criteria shall be considered the minimum routine maintenance to be performed: 1. Direct maintenance access for appropriate equipment must be provided to the Downstream Defender® structure. . Remove sediment accumulated in the grit chamber at 24- inches of depth. This measurement shall be taken using a stadia rod, sludge judge or similar measuring device. All maintenance can be performed from one access point from the surface with no requirements for Confined Space Entry. If required, entry into the SQU should be considered an OSHA confined space and guidelines followed. Water and sediment from the cleaning procedures should NOT be dumped into a sanitary sewer. Disposal of all sediment must be in accordance with all federal, state and local requirements. 2. The connecting manhole and diversion weir shall be kept clean of sediment, debris and trash. Inspect and remove all sediment, debris and trash as needed. Water and sediment from the cleaning procedures should NOT be dumped into a sanitary sewer. Disposal of all sediment must be in accordance with all federal, state and local requirements. 3. Cleanout of the Downstream Defender® structure with a vacuum truck shall be performed as needed. 4. See attached document from Downstream Defender®. 5. Entry into the Downstream Defender® unit is considered as an OSHA regulated confined space in which all requirements shall be strictly adhered. 6. Greenspace and landscaping on site shall be maintained to keep grass cover dense and vigorous. At a minimum, maintenance should include periodic mowing, occasional spot reseeding, and weed control. Grass must never be mowed close to the ground. Grass heights in the 4 -6" range are recommended. Fertilization of grass shall be done when needed to maintain the health of the grass, with care not to over -apply the fertilizer. 7. Remove all trash and debris from storm sewers, inlets and manhole structures. 8. All waste should be disposed of by a certified waste hauler with documentation of the source and approved disposal location. Water and sediment from the cleaning procedures should NOT be dumped into a sanitary sewer. Disposal of all sediment must be in accordance with all federal, state and local requirements. 9. Using a vacuum truck, remove all accumulated oil and water from the sump manholes with Snout®'s. Remedial Maintenance: Remedial maintenance shall occur whenever deemed necessary either by the BMP owner or the City of Carmel. (i.e. trash / debris removal, vacuum truck cleaning, etc...) A. City of Carmel Responsibilities: The City of Carmel will not be responsible for any required maintenance or associated costs for the BMP. BMP Inspection and Maintenance Requirements BMP INSPECTION REQUIREMENTS MAINTENANCE REQUIREMENTS FEES REFERENCE DOCUMENT(S) Downstream Defender® 4' Diameter Semi - annually (June & December) by owner and after every rain event > 1 inch over a 24hr - period. As directed by City Remove sediment accumulated in the grit chamber reaches 24- inches of depth in the sump. Refer to the "Maintenance" section of the O &M Manual. Cleanout required a minimum of once per year. Annual Inspections & fees as required by the City Attached documents from Downstream Defender®. City of Indianapolis Stormwater Quality Treatment Unit (SQTU) Selection Guide. Connecting Semi - annually (June & December) by owner and after every rain event > 1 inch over a 24hr - period or as directed by City. Remove sediment and trash as needed. Cleanout required a minimum of once per year. N/A N/A Manhole & Diversion Weir with Sum • Snout®'s Semi - annually (June & December) by owner and after every rain event > 1 inch over a 24hr - period or as directed by City. As directed by City Using a vacuum truck, remove all accumulated oil and water from the sump manholes with Snout ®'s. Responsibility City to perform annual inspections based upon BMP checklist. Owner to perform semi - annual inspections of BMP for sedimentation levels. The BMP owner is responsible for all maintenance and costs associated therewith. Owner is responsible for annual inspection fees as outlined in Section 103.04. Section 103.04 Pg 1 -12 Downstream Defender® INSPECTION CHECKLIST: 1. Maximum SQU sediment depth is 24- inches. Maintenance is required. 2. Sediment depth is done by taking 2 measurements with a sediment probe such as a Sludge Judge® or similar measuring device; to determine the depth of sediment build -up within the sump. Refer to Appendix A, Page 6 & Figure 5. 3. On -site Hydrocarbon spills (e.g. gasoline, oil, hydraulic fluids) that enter the subsurface stormwater collection system and travel to the Downstream Defender® SQU shall require immediate mitigation by the owner. Absorbent pads or a vacuum truck should be utilized to remove the oily layer. 4. Entry into the Downstream Defender® unit is considered as an OSHA regulated confined space in which all requirements shall be strictly adhered. 5. Water and sediment generated from the cleaning procedure shall NOT be dumped into a sanitary sewer. All waste should be disposed of by a certified waste hauler with documentation of the source and approved disposal location. Disposal of all sediment must be in accordance with all Federal, State, and Local requirements. 6. Inspection frequency of the Downstream Defender® SQU shall occur every 6 months at a minimum. 7. Off -line BMP configurations require inspection and maintenance of the connecting & diversionary manhole structures /weirs. 8. Detail drawing of the Downstream Defender® SQU is included in Appendix E of this O &M Manual. 9. On -site Hydrocarbon spills (e.g. gasoline, oil, hydraulic fluids) that enter the subsurface stormwater collection system and travel to the Downstream Defender® SQU shall require immediate mitigation by the owner. Absorbent pads or a vacuum truck should be utilized to remove the oily layer. 10. Disposal of all sediment must be in accordance with all Federal, State, and Local requirements. 11. Cleanout of the Downstream Defender® SQU shall occur once a year (minimum). Storm Sewer Inspection and Maintenance Requirements Storm Sewer Infrastructure INSPECTION REQUIREMENTS MAINTENANCE REQUIREMENTS Storm Inlets, Manholes, Storm Cleanouts Semi - annually (April & October) by owner and after every rain event > 1 inch over a 24hr - period. More frequent inspections should be performed in areas where there is higher potential for trash or litter (e.g. truck docks, trench drains) and during the Fall when leaves are present on the ground. Catch basins should also be inspected for sediment depth. A maximum sediment depth equal to 6- inches or no greater than 1/4 of the pipe diameter is the point when the catch basin /pipe should be cleaned of sediment and debris. Pipes, Swales, Ditches Monthly by owner and after every rain event > 1 inch over a 24hr - period. Swales /Ditches should be clear of high plant growth (5- inches maximum); unobstructed by buildings, fences, vehicles, landscape debris; and have a uniform slope with 1.3% minimum preferred. More frequent inspections should be performed in areas where there is higher potential for trash or litter (e.g. truck docks, trench drains) and during the Fall when leaves are present on the ground. Pipes should also be inspected for sediment depth. A maximum sediment depth equal to 6- inches or no greater than 1/4 of the pipe diameter is the point when the pipe should be cleaned of sediment and debris. Responsibility Owner to perform inspections of storm sewer infrastructure. The owner is responsible for all maintenance and costs associated therewith. Hydro1 International Downstream Defender® Stormwater Treatment System Operation and Maintenance Manual DOWNSTREAM DEFENDER° OPERATION AND MAINTENANCE MANUAL Table of Contents 3 Downstream Defender by Hydro International - Benefits of the Downstream Defender - Applications - Downstream Defender Components 4 Operation - Introduction - Pollutant Capture and Retention - Wet Sump - Blockage Protection 4 Maintenance - Overview - Determining You Maintenance Schedule 5 Maintenance Procedures - Inspection - Floatables and Sediment Cleanout 8 Downstream Defender Installation Log 9 Downstream Defender Inspection and Maintenance Log COPYRIGHT STATEMENT: The contents of this manual, including the drawings and specifications contained herein or annexed hereto, are intended for the use of the recipient to whom the document and all associated information are directed. Hydro International plc owns the copyright of this document (including any drawings or graphics), which is supplied in confidence. It must not be used for any purpose other than that for which it is supplied and must not be reproduced, in whole or in part stored in a retrieval system or transmitted in any form or by any means without prior permission in writing from Hydro International plc. Downstream Defender is a trademarked hydrodynamic vortex separation device of Hydro International plc. A patent covering the Downstream Defender has been granted. DISCLAIMER: Information and data contained in this manual is exclusively for the purpose of assisting in the operation and maintenance of Hydro International plc's Downstream Defender. No warranty is given nor can liability be accepted for use of this information for any other purpose. Hydro International plc have a policy of continuous product development and reserve the right to amend specifications without notice. Hydro International 2 DOWNSTREAM DEFENDER° OPERATION AND MAINTENANCE MANUAL Downstream Defender° by Hydro International BENEFITS OF THE DOWNSTREAM DEFENDER The Downstream Defender is an advanced Hydrodynamic Vortex Separator designed to provide high removal efficiencies of settleable solids and their associated pollutants, oil, and floatables over a wide range of flow rates. The Downstream Defender has unique, flow- modifying internal components developed from extensive full -scale testing, CFD modeling and over thirty years of hydrodynamic separation experience in wastewater, combined sewer and stormwater applications. These internal components distinguish the Downstream Defender from simple swirl -type devices and conventional oil /grit separators by minimizing turbulence and headlosses, enhancing separation, and preventing washout of previously stored pollutants. The high removal efficiencies and inherent low headlosses of the Downstream Defender allow for a small footprint making it a compact and economical solution for the treatment of non -point source pollution. • Removes sediment, floatables, oil and grease • No pollutant washouts • Small footprint • No loss of treatment capacity between clean -outs • Low headloss • Efficient over a wide ranges of flows • Easy to install • Low maintenance APPLICATIONS • New developments and retrofits • Utility yards • Streets and roadways • Parking lots • Pre - treatment for filters, infiltration and storage • Industrial and commercial facilities • Wetlands protection DOWNSTREAM DEFENDER COMPONENTS 1. Central Access Port 2. Floatables Access Port (6 -ft., 8 -ft. and 10 -ft. models only) 3. Dip Plate 4. Tangential Inlet 5. Center Shaft 6. Center Cone 7. Benching Skirt 8. Floatables Lid 9. Outlet Pipe 10. Floatables Storage 11. Isolated Sediment Storage Zone 3 DOWNSTREAM DEFENDER® OPERATION AND MAINTENANCE MANUAL Operation INTRODUCTION The Downstream Defender operates on simple fluid hydraulics. It is self- activating, has no moving parts, no external power requirement and is fabricated with durable non - corrosive components. No manual procedures are required to operate the unit and maintenance is limited to monitoring accumulations of stored pollutants and periodic clean -outs. The Downstream Defender has been designed to allow for easy and safe access for inspection /monitoring and clean -out procedures. Entry into the unit or removal of the internal components is not necessary for maintenance, thus safety concerns related to confined - space -entry are avoided. POLLUTANT CAPTURE AND RETENTION The internal components of the Downstream Defender have been designed to protect the oil, floatables and sediment storage volumes so that separator performance is not reduced as pollutants accumulate between clean -outs. Additionally, the Downstream Defender is designed and installed into the storm drain system so that the vessel remains wet between storm events. Oil and floatables are stored on the water surface in the outer annulus separate from the sediment storage volume in the sump of the unit providing the option for separate oil disposal, and accessories such as adsorbant pads. Since the oil /floatables and sediment storage volumes are isolated from the active separation region, the potential for re- suspension and washout of stored pollutants between clean -outs is minimized. WET SUMP The sump of the Downstream Defender retains a standing water level between storm events. The water in the sump prevents stored sediment from solidifying in the base of the unit. The clean -out procedure becomes more difficult and labor intensive if the system allows fine sediment to dry -out and consolidate. Dried sediment must be manually removed by maintenance crews. This is a labor intensive operation in a hazardous environment. BLOCKAGE PROTECTION The Downstream Defender has large clear openings and no internal restrictions or weirs, minimizing the risk of blockage and hydraulic losses. In addition to increasing the system headloss, orifices and internal weirs can increase the risk of blockage within the unit. Maintenance OVERVIEW The Downstream Defender protects the environment by removing a wide range of pollutants from stormwater runoff. Periodic removal of these captured pollutants is essential to the continuous, long- term functioning of the Downstream Defender. The Downstream Defender will capture and retain sediment and oil until the sediment and oil storage volumes are full to capacity. When sediment and oil storage capacities are reached, the Downstream Defender will no longer be able to store removed sediment and oil. Maximum pollutant storage capacities are provided in Table 1. Figure 1: Pollutant storage volumes of the Downswtream Defender 4 DOWNSTREAM DEFENDER® OPERATION AND MAINTENANCE MANUAL The Downstream Defender allows for easy and safe inspection, monitoring and clean -out procedures. A commercially or municipally owned sump -vac is used to remove captured sediment and floatables. Access ports are located in the top of the manhole. On the 6 -ft, 8 -ft and 10 -ft units, the floatables access port is above the outlet pipe between the concrete manhole wall and the dip plate. The sediment removal access ports for all Downstream Defender models are located directly over the hollow center shaft. Maintenance events may include Inspection, Oil & Floatables Removal, and Sediment Removal. Maintenance events do not require entry into the Downstream Defender, nor do they require the internal components of the Downstream Defender to be removed. In the case of inspection and floatables removal, a vactor truck is not required. However, a vactor truck is required if the maintenance event is to include oil removal and /or sediment removal. DETERMINING YOUR MAINTENANCE SCHEDULE The frequency of cleanout is determined in the field after installation. During the first year of operation, the unit should be inspected every six months to determine the rate of sediment and floatables accumulation. A simple probe such as a Sludge Judge® can be used to determine the level of accumulated solids stored in the sump. This information can be recorded in the maintenance log (see page 9) to establish a routine maintenance schedule. The vactor procedure, including both sediment and oil /flotables removal, for a 6 -ft Downstream Defender typically takes less than 30 minutes and removes a combined water /oil volume of about 500 gallons. Table 1 INSPECTION PROCEDURES Inspection is a simple process that does not involve entry into the Downstream Defender. Maintenance crews should be familiar with the Downstream Defender and its components prior to inspection. SCHEDULING • It is important to inspect your Downstream Defender every six months during the first year of operation to determine your site - specific rate of pollutant accumulation. • Typically, inspection may be conducted during any season of the year RECOMMENDED EQUIPMENT • Safety Equipment and Personal Protective Equipment (traffic cones, work gloves, etc.) • Crow bar or other tool to remove grate or lid • Pole with skimmer or net • Sediment probe (such as a Sludge Judge ®) • Trash bag for removed floatables • Downstream Defender Maintenance Log Downstream Defender Pollutant Storage Capacities and Max. Cleanout Depths Unit Diameter Total Oil Storage Oil Clean -out Depth Total Sediment Storage Sediment Clean -out Depth Max. Liquid Volume Removed (feet) (gal.) (inches) (gal.) (inches) (gal.) 4 70 <16 141 <18 384 6 230 <23 424 <24 1239 8 525 <33 939 <30 2884 10 1050 <42 1,757 <36 5546 NOTES 1. Refer to Dowmstream Defender Clean -out Detail (Fig. 1) for measurement of depths. 2. Oil accumulation is typically less than sediment, however, removal of oil and sediment during the same service is recommended. 3. Remove floatables first, then remove sediment storage volume. 5 DOWNSTREAM DEFENDER® OPERATION AND MAINTENANCE MANUAL Figure 4 Figure 5 INSPECTION PROCEDURES 1. Set up any necessary safety equipment around the access port or grate of the Downstream Defender as stipulated by local ordinances. Safety equipment should notify passing pedestrian and road traffic that work is being done. 2. Remove the lids to the manhole. Figure 4. (NOTE: The 4 -ft Downstream Defender® will only have one lid). 3. Without entering the vessel, look down into the chamber to inspect the inside. Make note of any irregularities. See Figure 7 and 8 for typical inspection views. 4. Without entering the vessel, use the pole with the skimmer net to remove floatables and loose debris from the outer annulus of the chamber. 5. Using a sediment probe such as a Sludge Judge ®, measure the depth of sediment that has collected in the sump of the vessel. Figure 5. 6. On the Maintenance Log (see page 9), record the date, unit location, estimated volume of floatables and gross debris removed, and the depth of sediment measured. Also note any apparent irregularities such as damaged components or blockages. Figure 7: View over Center Shaft into sediment storage Zone Figure 6 7. Securely replace the grate or lid. 8. Take down safety equipment. 9. Notify Hydro International of any irregularities noted during inspection. FLOATABLES AND SEDIMENT CLEANOUT Floatables cleanout is typically done in conjunction with sediment removal. A commercially or municipally owned sump -vac is used to remove captured sediment and floatables. Figure 6. Floatables and loose debris can also be netted with a skimmer and pole. The access port located at the top of the manhole provides unobstructed access for a vactor hose and skimmer pole to be lowered to the base of the sump. SCHEDULING • Floatables and sump cleanout are typically conducted once a year during any season. • Floatables and sump cleanout should occur as soon as possible following a spill in the contributing drainage area Figure 8: View of outer annulus of floatables and oil collection zone 6 DOWNSTREAM DEFENDER® OPERATION AND MAINTENANCE MANUAL RECOMMENDED EQUIPMENT • Safety Equipment (traffic cones, etc) • Crow bar or other tool to remove grate or lid • Pole with skimmer or net (if only floatables are being removed) • Sediment probe (such as a Sludge Judge ®) • Vactor truck (flexible hose recommended) • Downstream Defender Maintenance Log FLOATABLES AND SEDIMENT CLEAN OUT PROCEDURES 1. Set up any necessary safety equipment around the access port or grate of the Downstream Defender as stipulated by local ordinances. Safety equipment should notify passing pedestrian and road traffic that work is being done. 2. Remove the lids to the manhole (NOTE: The 4 -ft Downstream Defender® will only have one lid). 3. Without entering the vessel, look down into the chamber to inspect the inside. Make note of any irregularities. 4. Using the Floatables Port for access, remove oil and floatables stored on the surface of the water with the vactor hose or the skimmer net. Figure 9. 5. Using a sediment probe such as a Sludge Judge*), measure the depth of sediment that has collected in the sump of the vessel and record it in the Maintenance Log (page 9). 6. Once all floatables have been removed, drop the vactor hose to the base of the sump via the Central Access Port. Vactor out the sediment and gross debris off the sump floor. Figure 6. Maintenance at a Glance 7. Retract the vactor hose from the vessel. 8. On the Maintenance Log provided by Hydro International, record the date, unit location, estimated volume of floatables and gross debris removed, and the depth of sediment measured. Also note any apparent irregularities such as damaged components or blockages. 9. Securely replace the grate or lid. Figure 9: Floatables and sediment are removed with a vactor hose ACTIVITY FREQUENCY Inspection Oil and Floatables Removal - Regularly during first year of installation - Every 6 months after the first year of installation - Once per year, with sediment removal - Following a spill in the drainage area Sediment Removal - Once per year or as needed - Following a spill in the drainage area NOTE: For most cleanouts it is not necessary to remove the entire volume of liquid in the vessel. Only removing the first few inches of oils /floatables and the sediment storage volume is required. 7 H yd ro International Downstream Defender Installation Log HYDRO INTERNATIONAL REFERENCE NUMBER: SITE NAME: SITE LOCATION: OWNER: CONTRACTOR: CONTACT NAME: CONTACT NAME: COMPANY NAME: COMPANY NAME: ADDRESS: ADDRESS: TELEPHONE: TELEPHONE: FAX: FAX: INSTALLATION DATE: / / MODEL (CIRCLE ONE): 4 -FT 6 -FT 8 -FT 10 -FT CUSTOM s t o r rte w a t e Ir Downstream Defender RO Advanced Vortex Separator Proven to be more efficient for removing pollutants and preventing washout APPLICATIONS • Control of sediment, floatable trash and petroleum products • New developments • Redevelopment projects • Streets, roadways and parking lots • Pretreatment for filters, infiltration or storage ADVANTAGES • Most efficient separator available • Smaller footprint • Lower capital cost than other devices • Proven to prevent washout • Verified through nationally recognized programs • Low system headloss Oil & floatables storage volume The Downstream Defender is the most advanced vortex separator available for the removal of sediment, oil and floatables from stormwater runoff. The Downstream Defender is proven to be more efficient than other structural treatment devices in as little as 1/2 the footprint and is the only separator with internal components proven to prevent pollutant washout. Tangential inlet Dip plate cylinder Benching skirt Hydro International turning water around...' Isolated sediment storage zone Access to the sump for cleanout HOW IT WORKS Gwip' Outlet pipe Center shaft Center cone Isolated sediment storage zone The Downstream Defender has internal components designed to advance vortex separation by minimizing turbulence and headloss, increasing efficiency and preventing washout of stored pollutants. Stormwater is introduced tangentially into the side of the vessel, generating a rotating flow that spirals around the outside of the dip plate (red arrow). Oils, trash and floatable debris rise to the water surface and are trapped in the oil and floatables storage volume (yellow zone). As flow continues to spiral down around the dip plate cylinder, low energy vortex motion directs sediment inward along the benching skirt and into the protected sediment storage zone (brown zone). The benching skirt and center cone redirect the rotating flow up and inward between the center shaft and dip plate cylinder away from the stored sediment. The outlet pipe discharges treated effluent from within the dip plate cylinder ensuring the longest possible residence time (blue arrow). Advanced vortex separation is provided by extending and stabilizing the flow path while protecting trapped pollutants for a wide range of flow rates. Ph: 207.756.6200 • Fax: 207.756.6212 • Email: hiltech @hil- tech.com www.hydro-international.biz stormwater Downstream Defender° Maintenance Sizing and Design The Downstream Defender is easy to maintain using a sump -vac to remove captured sediment and floatables. Cleanout ports are located in the top of the manhole and provide access to pollutant storage areas. Maintenance is generally conducted every 12 to 18 months, although individual maintenance schedules are site specific. Hydro International works with owners and municipalities through networks of certified maintenance contractors to ensure proper maintenance practices. The Downstream Defender is sized and designed to accommodate site parameters. The device is commonly installed in an on -line configuration (figure A). In an off -line configuration an upstream diversion structure with an integral weir diverts treatment flows to the Downstream Defender. Excess storm flows spill over the weir directly to the outlet (figure B). A. Example of On -line Configuration maintenance access lids upstream manhole Low Headloss B. Example of Off -line Configuration y Flow Direction + treatment flow path -+ bypass flow path - Downstream Defender 1 Downstream Defender The Downstream Defender has clear openings and no internal restrictions in order to minimize hydraulic losses, blockages and the risk of upstream flooding. Downstream Defender Design Chart Upstream water level Outlet water level Model Number and Diameter (ft) Peak Treatment Flow (cfs) Maximum Pipe Diameter (in) Headloss at Peak Treatment Flow (in) Oil Storage Capacity (gal Ions) Sediment Storage Capacity (cubic yards Minimum Distance from Outlet Invert to Top of Rim (ft) Standard Distance Outlet Invert to Sump Floor (ft) 4 3.0 12 6 70 0.70 3.2 4.0 6 8.0 18 8 230 2.10 3.6 5.9 8 15.0 24 9 525 4.65 4.1 7.7 10 25.0 30 10 1,050 8.70 4.9 9.4 For more information please call our office toll free at 800 - 848 -2706 or inquire at www.hydro - international.biz. Hydro International This information is subject to change without notice. Certificate No 961366 ©Hydrolnternational2007 Hydro International • 94 Hutchins Drive • Portland, ME 04102 SS_SW_DD_4 -23 -07 HydroT International DOWNSTREAM DEFENDER° HANDLING AND INSTALLATION INSTRUCTIONS Hydro Internationals DOWNSTREAM DEFENDER® internal components are manufactured utilizing highly durable thermoplastics; however, improper handling may result in damage to components and accessories. Failure to comply with handling, and installation instructions voids all warranties. 1. Upon delivery of the DOWNSTREAM DEFENDER® components, inspect immediately for defects or shipping damage. If any discrepancies are found, notify Hydro International prior to unloading to initiate corrective action. Unloading of a damaged unit without notifying Hydro International voids all warranties and releases liability of costs to repair or replace from Hydro International and places onto the contractor. 2. At all times during unloading and installation, avoid unnecessary and extreme impacts to the internal components. All components shall be handled with firm and complete support. At no time shall anyone step, stand, or otherwise place an unnecessary load, on the components. 3. The DOWNSTREAM DEFENDER® shall be installed as soon after delivery as practical. Pending installation, all components shall be protected from ultraviolet light, vandalism, and impact. INSTALLATION — reference engineering drawings. 1. Excavation shall be properly prepared in advance and shall meet all applicable specifications for standards of construction. A sufficient sub -base of compacted stone, level and at correct elevation, is required as a minimum. Install the DOWNSTREAM DEFENDER® pre -cast base containing benching skirt in properly prepared excavation. Base must be level prior to installation of successive risers. 3. Install successive risers, cleaning joints and place supplied joint sealant per specifications. Ensure the riser(s) containing the inlet and overflow pipe knockouts is /are orientated per alignment shown on the engineering drawings. Do not install pre -cast lid. Grout pick holes, if applicable, with watertight non - shrink grout. NOTE: INTERNAL COMPONENTS NOT SHOWN FOR CLARITY OVERFLOW PIPE INLET PIPE PLAN VIEW 0 NCR ETE MANHOLE 4. Cut off the end of the inlet pipe (by others) at a 30° angle and connect so that the inlet pipe i.d. is tangent to the pre -cast i.d. as shown on the engineering drawings. Grout inlet knockout with watertight non - shrink grout (by others). Inlet pipe shall not protrude further into the unit than indicated on the engineering drawings. On the interior, grout must be finished to a uniform, smooth surface flush Hydro International • 94 Hutchins Drive • Portland, ME 04102 Tel: (207) 756 -6200 • Fax: (207) 756 -6212 • E -mail: hiltech @hil- tech.com with the pre -cast wall. No grout shall spill inside the unit. If required, plug inlet pipe and overflow pipe knockouts and test for watertightness. The cause of any leaks must be determined and corrected prior to backfilling. Failure to properly perform and pass test if required, releases Hydro from liability ensuing from such failure. 5. Center Shaft & Cone (10' units): If not bolted, attach shaft to dip plate using supplied 304 ss bolts, flat washers, lock washers and nuts. Install hardware so bolt heads are to the interior of the center shaft. 6. Place approved pipe coupling (by others) onto overflow stub. Using the lifting points on the support frame, carefully lower the dip plate assembly onto the stainless steel ledger angles attached to the interior wall of the pre -cast chamber. Orientate assembly so that overflow pipe stub aligns with overflow pipe knockout. 7. Attach the support frame to the ledger angles using supplied number of 304 ss bolts, flat washers, lock washers and nuts. On 10 foot units, square plate washers (supplied) are to be used in place of flat washers on top of support frame at the connection points to the four ledger angles. 8. Connect the outlet pipe to the overflow stub using the previously installed pipe coupling. Grout manhole outlet knockout with watertight non - shrink grout (by others). On the interior, grout must be finished to a uniform, smooth surface flush with pre -cast wall. No grout shall spill inside the unit. 9. Prepare the upper most riser joint with supplied joint sealant. Install pre -cast lid using match lines to correctly orientate the floatables access. The floatables access shall be located to the influent flow receiving side of the overflow pipe. 10. Install cast frame(s) and cover(s) using accepted construction standards of adjusting to grade. Carefully backfill around unit. DD - Handling & Install Instructions.doc Page 2 of 2 Rev. 11/10/04 H ydro International Downstream Defender Pipe Connections Defender Outlet The Defender outlet pipe passes through the manhole wall and is connected internally with a coupling to the overflow pipe stub. The overflow pipe stub is part of a roto- molded plastic component that has an outside diameter that corresponds to SDR 35 plastic pipe and cannot be modified. We recommend supporting the pipe and making the internal connection first, and then grouting the manhole opening with non - shrink grout after. Alternately, a manhole penetration boot may be used to obtain a watertight connection through the manhole wall. Depending on the difference in pipe o.d., the internal connection to the pipe stub can be accomplished with a standard pipe coupling, a large diameter coupling and bushing arrangement similar to the Fernco L.D.C.X. product line, a bituminous pipe wrap similar to Mar Mac Polyseal, or pvc fittings. (The pipe wrap is typically the most cost effective means of making the connection.) Where the outside diameters differ by more than 6" a pipe wrap may be the only option. In some instances where there is a very large difference in pipe o.d., a short length of pipe with an o.d. close to the stub should be connected with a standard " Fernco type" coupling and the connection to the larger o.d. pipe should be made outside of the Defender manhole. An external pipe wrap connection for pipes with very large differences in o.d. should utilize a grout diaper around the joint to ensure a watertight connection. In some cases there may be a lead -time of several days to fabricate and ship the required coupling. Please refer to the attached Downstream Defender Coupling Information sheet. Defender Inlet To initiate the vortex flow pattern, the inlet pipe enters the Defender manhole tangent to the inside diameter rather than passing through the manhole center line. The end of the pipe gets cut off at a 30° angle inside the manhole. An internal connection is not necessary on the inlet. To ensure a watertight connection, we recommend grouting the inlet with non - shrink grout. The shape and size of the inlet penetration in the manhole wall make it unlikely that a penetration boot can be used on the inlet. Hydro International • 94 Hutchins Drive • Portland, ME 04102 Tel: (207) 756 -6200 • Fax: (207) 756 -6212 • E -mail: hiltech @hil- tech.com www.Hydro- International.biz H ydro International Downstream Defender® Overflow Pipe Coupling Information 0 za (D 0 DIMENSIONS DEFENDER Diameter (ft.) L (in.) Plastic o /flow pipe stub o.d. (in.) 4 6 -3/8 12 -1/2 6 9 -9/16 18-11/16 8 12 -3/4 24 -13/16 10 15-1/4 36 VENDORS Product Manufacturer Contact Phone Fernco Fernco - East 800.521.1283 Fernco Fernco - West 800.232.3092 Esky Wrap Cadilloc, Inc. 906.786.0460 Indiana Seal Indiana Seal 800.428.5309 PipeConX ** Uniseal 800.443.9081 Polyseal (need to supply pipe materials) Mar Mac Rich Howie, Bob Weir 877.962.7622 To ensure procurement of correct coupling, it is recommended that the coupling manufacturer be contacted directly well in advance with the o /flow pipe stub o.d. as listed above and the material and o.d. of the outlet pipe being utilized. Additional or different equipment may be required to connect to outlet pipe of different diameter or to CPP (Corrugated Plastic Pipe). *Large Diameter Coupling Extra (LDCX) sizing, availability, costs and delivery to be determined by contractor. * *PipeConX - no couplings larger than 25 ", no custom sizes. 6/18/02 Rev. E Hydro International • 94 Hutchins Drive • Portland, ME 04102 25 Years of Tel: (207) 756 -6200 • Fax: (207) 756 -6212 • E -mail: hiltech @hil- tech.com Vortex www.Hydro- International.biz Technology F. Inspection Report H d ro International Downstream Defender Inspection and Maintenance Log DATE INITIALS DEPTH OF FLOATABLES AND OILS SEDIMENT DEPTH MEASURED VOLUME OF SEDIMENT REMOVED SITE ACTIVITY AND COMMENTS INSPECTION & MAINTENANCE LOG Pervious Concrete Curb with Underdrair SITE NAME: ED MARTIN BUICK GMC JOB LOCATION: 9896 N Michigan Rd; Carmel, IN 46032 INSPECTION DATE: INSPECTED: Pervious Concrete Curb at Curb Inlet Str #'s 201 -204 Date Initials Visible Particulates on Curb (sf) Spalling or Degradation on Curb (sf) Depth of Sediment in SSD (in) Site Activity 8 Comments Inspector Signature Printed