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HomeMy WebLinkAbout_O&M Manual Revised 5-10-19GRAMERCY SECTION 2, 3 & 4 OPERATIONS & MAINTENANCE MANUAL BMP TYPE: WET POND WITH NATIVE BANKS VORTECHS WATER QUALITY UNIT CONTECH CDS WATER QUALITY UNIT SUMP CATCH BASINS with SNOUTS BMP OWNER: MOHAWK WB, LLC Contact Person: Ed Flemming 9757 Westpoint Drive Suite 600 Indianapolis, Indiana 46256 Contact Phone Number: (317) 564-7301 PREPARED BY: Stoeppelwerth & Associates, Inc. Contact Person: Christian C. Esposito 7965 East 106th Street Fishers, Indiana 46038 Contact Phone Number: (317) 570-4713 Contact Email Address: cesposito@stoeppelwerth.com DATE PREPARED: March 19, 2019 DATE REVISED: May 10, 2019 12/04/20 OPERATIONS AND MAINTENANCE MANUAL GRAMERCY, SECTION 2, 3 & 4 JOB# 65840BKM TABLE OF CONTENTS OPERATIONS AND MAINTENANCE MANUAL PURPOSE AND BACKGROUND STORM WATER QUALITY CONTROL REQUIREMENTS INSPECTION AND MAINTENANCE REFERENCES APPENDIX A – BMP DESCRIPTION PURPOSE & BACKGROUND INSPECTION & MAINTENANCE ACTIVITIES EMERGENCY CONTACT INFORMATION REFERENCES INVASIVE PLANT SPECIES APPENDIX B BMP LOCATION MAP DETAIL DRAWINGS APPENDIX C INSPECTION & MAINTENANCE CHECKLIST APPENDIX D OWNER ACKNOWLEDGMENT AGREEMENT 05/10/2019 2 of 49 12/04/20 OPERATIONS AND MAINTENANCE MANUAL GRAMERCY, SECTION 2, 3 & 4 PURPOSE AND BACKGROUND Each year thousands of acres of Indiana land undergoes disturbance and/or is converted for the construction of subdivisions, commercial and industrial centers, highways, and other land uses. Agriculture and urban development are the two major types of land-disturbing activities in Indiana. Both are very important to the economic well being of the citizens of the state. Without proper planning and the wise selection of storm water management measures, these areas of soil disturbance are very vulnerable to accelerated erosion and sedimentation. Whenever vegetation is removed from the land’s surface, the soil becomes exposed to the erosive effects of wind and water. Although erosion is a natural process, it can be greatly accelerated by human action that disturbs the land’s surface. While it is true that the tons of soil eroded on agricultural lands is much greater, it has been proven that the amount of soil eroded on a per-acre basis can be many times greater on active construction sites. The loss of soil through erosion commonly results in the loss of good topsoil and the associated minerals and nutrients required for plant establishment and growth. Soil erosion not only causes on-site damage problems, but can also negatively impact water quality downstream through sediment pollution. It has been shown that sediment is the number one water quality pollutant by volume in Indiana. Sediment damage can take many forms. Sediment accumulation in wetlands can reduce their capacity to retain storm water and its value to wildlife. Sediment deposition in storm sewers can reduce their efficiency and capacity. Sediment and accompanying nutrients often reaches lakes and leads to algal blooms, a decrease in lake depth, and a decrease in the recreational and aesthetic value of the lake. In addition to erosion and sediment damage, the building of residential subdivisions, shopping centers, industrial parks, schools, recreational attractions, etc. can have a significant effect on the patterns and amounts of storm water runoff during and after construction takes place. This often leads to water quality degradation and more frequent flooding events. The final land use associated with many projects will also contribute to the discharge of pollutants. These pollutants will typically be generated by the activities that are associated with the final land use. It is important to practice effective storm water management and treatment of storm water runoff before, during, and after construction. Otherwise, the landowner and/or public may end up paying more for project reconstruction and replacement/maintenance of existing infrastructure. Furthermore, public environmental awareness demands that land users work with nature, and not against it, to protect Indiana’s land and water resources. There are many ways to minimize the impacts of urbanization and protect the integrity of Indiana’s natural resources. One method is through careful planning and inclusion of proven storm water management measures in a project’s construction and development plans. Careful planning can prevent or at the very least alleviate much of the damage caused by erosion and sedimentation and the pollutants that will be associated with the final land use. However, careful planning and incorporation of appropriate storm water quality measures into a project’s construction plans is not enough. These measures must be deployed and maintained on the site throughout all construction phases. (Indiana Storm Water Quality Manual, 2007) 05/10/2019 3 of 49 12/04/20 This manual provides engineers, developers, builders, contractors, government officials, and other with guidance on the inspection and maintenance of installed post-construction storm water quality measures for Gramercy, Section 2, 3 & 4. STORM WATER QUALITY CONTROL REQUIREMENTS BMP OWNER CONTACT INFORMATION MoHawk WB, LLC Contact Person: Ed Flemming 9757 Westpoint Drive Suite 600 Indianapolis, In. 46256 Contact Phone Number: (317) 564-7301 The project site owner must submit to the City of Carmel Engineering Department a Storm Water Pollution Prevention Plan (SWPPP) that would show the placement of appropriate BMP(s) specified in the City of Carmel Stormwater Technical Standards Manual. The noted BMP(s) must be designed, constructed, and maintained according to guidelines provided or referenced in the City of Carmel Stormwater Technical Standards Manual. It is the policy of the City of Carmel Engineering Department that the water quality management program be performance-based. To that end, a best management practice (BMP) approved for use in the City of Carmel will be capable of meeting or exceeding the 80% removal target for TSS whether the control be a single structure or a series of controls. In addition to TSS removal, a BMP must also be designed to store and treat the water quality volume (WQv). The water quality volume is the storage needed to capture and treat the runoff from the first inch of rainfall. INSPECTION AND MAINTENANCE It is essential that any approved BMP be properly inspected and maintained in order to assure the TSS removal performance. Therefore, an inspection and maintenance plan is required. The city encourages the use of a high-efficiency, low maintenance BMP(s) that has the potential for removal of multiple storm water pollutants. The City of Carmel Engineering Department will perform annual inspections of permanent BMP(s) to ensure compliance. Routine monthly and annual inspections are the responsibility of the BMP owner. The BMP owner shall be financially responsible for any maintenance or repairs required by the city and/or its representatives during the city’s inspections. The city and/or its representatives have the right to enter the property to inspect the BMP(s). In the event that the city finds a BMP in need of maintenance or repair, the city will notify the BMP owner of the necessary maintenance or repairs and give the BMP owner a timeframe for completing the maintenance or repairs. If the maintenance or repairs are not completed within the designated timeframe, the city shall perform the maintenance or repairs and bill the BMP owner for the actual costs for the work. Annual inspection reports are required to be submitted to the 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 05/10/2019 4 of 49 12/04/20 included in the report are not addressed in a timely manner, the BMP owner faces enforcement action from the City of Carmel. REFERENCES 1. Indiana Storm Water Quality Manual - October 2007 2. City of Carmel Stormwater Technical Standards Manual - June 2007 05/10/2019 5 of 49 12/04/20 APPENDIX A BMP DESCRIPTION 05/10/2019 6 of 49 12/04/20 WET POND WITH NATIVE PLANTINGS GRAMERCY, SECTION 2, 3 & 4 PURPOSE & BACKGROUND The BMP for Gramercy, Section 2, 3 & 4 is a “Wet Pond with Native Plantings”. Wet detention ponds, including storm water ponds, retention ponds, and wet extended detention ponds, are constructed basins that contain a permanent pool of water and treat polluted storm water runoff. The most commonly used wet detention ponds are extended detention ponds. The purpose of a wet detention pond is to detain storm water runoff long enough for contaminated sediments to settle and remain in the pond and allow the water in the pond to be displaced by the next rain event. This sedimentation process removes particulates, organic matter, and metals from the water while nutrients are removed through biological uptake. By capturing and retaining runoff, wet ponds control both storm water quantity and quality. A higher level of pollutant removal and storm water quality can be achieved through the use of wet detention ponds than with many other storm water management measures such as sand filters and dry ponds. (Indiana Storm Water Quality Manual, 2007) INSPECTION & MAINTENANCE ACTIVITIES The performance of a wet detention pond is highly dependant on the inspection and maintenance of the pond. If the pond is not properly maintained, the ability to remove pollutants will decrease. The BMP owner agrees to the following monthly inspection program: Inspection Item Inspection Procedure 1. Vegetation  Some species of plants are considered invasive and should be removed within one month of discovery. Invasive species include reed canary grass, purple loosestrife, common reed, and narrow leaf cattail. Appendix A contains photos of these four common invasive species.  No trees shall be planted in the BMP. If trees appear, they should be removed.  Landscaped area of the banks that are eroded or have exposed bare earth shall be restored to proper grade, stabilized, and re-seeded with the appropriate native seed mixtures. 2. Floatable Pollutants  Remove all floatable debris.  Note visible pollution such as oily sheens, discoloration, and cloudy or muddy water.  Remove shoreline pollution such as trash or oily liquids.  Remove miscellaneous debris. 3. Erosion  Inspect inlet, outlet, headwall and endwall areas for erosion and undercutting. If erosion is occurring, additional scour protection measures will need to be employed.  Areas of severe erosion or other conditions that may constitute a public hazard should be corrected as soon as possible and prior to the next monthly inspection. 4. Outlet  All pond outlets shall be inspected and checked for debris and obstructions that disrupt the flow within the storm water management system. If any pipes are obstructed, they must be cleared. 5. Embankment  Animal burrows should be controlled or removed when present in densities that endanger the integrity of the embankment. Damage caused by animal burrows must be repaired as soon as possible. Any burrowing 05/10/2019 7 of 49 12/04/20 control effort will need to be carefully planned and executed to avoid negative impacts on adjacent habitats and wildlife. Such measures will be confined to the embankment. Animals that may be on concern are beavers and muskrat.  Inspect the slopes of the BMP for any sliding or displacement of scour protection. Please note location and describe failure. Maintenance responsibilities shall remain in effect for the life of the BMP from the date the construction is completed. Inspections must be documented on the inspection form included in this Operations and Maintenance Manual. Maintenance Item Maintenance Procedure 1. Vegetation Although the wet pond BMP is expected to develop into a dynamic ecosystem that will eventually require little or no vegetation maintenance, some vegetation maintenance will be required in the first two years following construction in order to give the new plant communities a chance to become well established. Precautionary measures must be taken to prevent invasive species from establishing. These species should be either physically removed or treated with herbicide by a qualified plant maintenance professional. Physical removal is strongly preferred above the application of herbicide. If herbicide is used, application must be conducted in compliance with federal, state, and local laws and regulations. Replant and reseed vegetation when damaged, vandalized or removed in compliance with original planting specifications. 2. Aquatic Weeds In some instances, algae and other forms of undesired plant life may become established in the wet pond. Extremely dense algae and submerged wees also cause fish kills as a result of oxygen depletion. Some ponds may develop problems with microscopic algae and floating weeds, such as duckweed. Herbicide application, copper sulfate, or other approved algae control methods are suggested. Any chemical applications must be conducted in compliance with federal, state, and local laws and regulations. 3. Nuisance Wildlife Species In addition to burrowing animals, geese may be attracted to the wet pond BMP(s). Turf grass is typically proposed around the wet pond fringe areas. However, it is suggested that native shrubs and ground cover be planted in the buffer area to help deter geese by making it more difficult for them to approach the ponds. 4. Rip-Rap Periodic inspection is required of rip rap areas. Look for slumping, displaced rock material, and erosion. Check for accumulated sediment, bank instability, and scour holes. Any areas that have sustained damage shall be promptly restored to comply with original specifications. EMERGENCY CONTACT INFORMATION City of Carmel Engineering Department - (317) 571-2441 City of Carmel Fire Department - (317) 571-2600 Hamilton County Surveyor’s Office - (317) 776-8495 Indiana Department of Environmental Management (IDEM) - (317) 232-8603 REFERENCES 1. Indiana Storm Water Quality Manual - October 2007 2. City of Carmel Stormwater Technical Standards Manual - June 2007 05/10/2019 8 of 49 12/04/20 NATIVE POND BANKS GRAMERCY, SECTION 2, 3 & 4 PURPOSE & BACKGROUND The BMP for Gramercy, Section 2, 3 & 4 is a sedge meadow mixture to be established within around all end sections located at the “Wet Pond with Native Banks”. This will act as a filter buffer between the “Wet Pond with Native Banks” and the outlet. INSPECTION & MAINTENANCE ACTIVITIES Maintenance and Management. Short Term Maintenance The first 5 years of maintenance is typically referred to as short term. Most sites need maintenance mowings to keep weeds from going and to allow light to penetrate the ground encouraging growth of the majority of the slow-growing natives. You may get some blooms within your planting ledges in the first growing season, most likely the Black-eyed Susan, but you must sacrifice those beautiful flowers if you want the other species to establish! Keep the areas cut to 4-6” the first year and around 6-10” during the next few years until native plants have pushed through and are evident. Don’t pull the weeds! This will disturb the root systems of the nearby natives trying to establish. Be patient – although some species may reach flowering stages in year 3, many could take 5 years or more. Long Term Maintenance Invasive plant species pose the greatest maintenance challenge second only to impacts from new housing constructed near the pond banks. However, progress has been made dealing with both issues, the first through research, the second through open discussions regarding the importance of buffers. Next to hydrology and soils, vegetation is a critical indicator of a site's sustainability. When a planting ledge's operational life cycle is complete, it is invasive plants and noxious weeds that may pose the greatest threat to the long-term ecological integrity of the functions of the planting ledge sedges. A larger issue is the fate of a pond bank site and planting ledges after 10 to 15 years, when the initial maintenance is complete, all practices have been sustained, and the site is potentially turned over to a new owner such as a neighborhood HOA. Open discussions should be set up between the developer and said HOA to make all maintenance issues apparent and respected. 05/10/2019 9 of 49 12/04/20 Lake Edge Enhancement 1 Procedures for Lake Edge Enhancement System Part 1 General 1.01 Section Includes A. Preparation B. Seeding C. Planting D. Seed Protection E. Waterfowl exclusion F. Maintenance 1.02 Bidder qualifications A. The submitting bidders shall be, and have been, actively and directly engaged in wetland plant installation for a period of two (2) or more years. Provide proof of five (5) or more successful wetland plant installations. B. Qualified bidders shall possess specialized equipment for working in and around water, including a small boat, hip waders, and floatation life preservers to be worn while working in water. 1.03 Environmental Requirements A Installation shall be performed in mid to late spring, specifically between April 1 and July 1st. 05/10/2019 10 of 49 12/04/20 Lake Edge Enhancement 2 B. Hydrology shall be established prior to installation. Detention pond must have an established pool level to utilize as a reference for planting. C Surrounding uplands shall be stabilized with the specified grass seed mix. No pre-emergent herbicides shall be applied to surrounding turf during the six months prior to installation and for at least 1 year following installation. D. Emergent plants shall be installed prior to seeded communities. 1.04 Materials A. All native seed shall be stored in a cooler at 40 degrees Fahrenheit prior to installation 1. All native seed must be of wild ecotype as provide by Spence Restoration Nursery or approved local source. No hybrids or cultivars may be included. 2. Local genotype seed shall be used whenever possible due to its adaptation to central Indiana soil and climate. These specifications do not apply to the temporary matrix. B. Container grown plants shall be used for the emergent plant communities. 1. Container grown plant must be nursery propagated of wild ecotype in 2 3/8” square by 3 ¾” deep open-bottomed pots as provided by Spence Restoration Nursery or approved local source. 2. Container grown plants shall be inoculated with VAM (Vesicular Arbuscular Mycorrhizae) endomycorrhizal fungi as provided by Spence Restoration Nursery or approve local source. Part 2 Products 2.01 Seed Mixture A. Mesic Community Temporary Matix 32 lbs Avena sativa (Seed Oats) 5 lbs Lolium multiflorum (Annual Ryegrass) 05/10/2019 11 of 49 12/04/20 Lake Edge Enhancement 3 Permanent Matrix Grasses oz/acre 16 Andropogon gerardii (Big Bluestem) 32 Elymus canadensis (Canada Wild Rye) 12 Elymus virginicus (Virginia Wild Rye) 4 Panicum virgatum (Switchgrass) 32 Schizachyrium scoparium (Little Bluestem) 16 Sorghastrum nutans (Indian Grass) 112 Forbs 1.5 Asclepias syriaca (Common Milkweed) 1 Baptisia alba (White False Indigo) 2 Coreopsis tripteris (Tall Coreopsis) 1 Dalea purpureum (Purple Prairie Clover) 1 Drymocallis arguta (Prairie Cinquefoil) 3 Echinacea purpurea (Purple Coneflower) 2 Eryngium yuccifolium (Rattlesnake Master) 1 Helianthus grosseserratus (Sawtooth Sunflower) 1 Helianthus occidentalis (Western Sunflower) 0.5 Helianthus pauciflorus (Showy Sunflower) 3 Heliopsis helianthoides (False Sunflower) 2 Liatris pycnostachya (Prairie Blazing Star) 0.5 Monarda fistulosa (Bergamot) 2 Oligoneuron riddellii (Riddell's Goldenrod) 1 Oligoneuron rigidum (Stiff Goldenrod) 0.5 Penstemon digitalis (Foxglove Beardtongue) 0.5 Pycnanthemum virginianum (Mountain Mint) 4 Ratibida pinnata (Yellow Coneflower) 2 Rudbeckia hirta (Black-Eyed Susan) 3 Rudbeckia subtomentosa (Sweet Black-Eyed Susan) 2 Senna hebecarpa (Wild Senna) 2 Silphium integrifolium (Rosinweed) 2 Silphium laciniatum (Compass Plant) 3 Silphium terebinthinaceum (Prairie Dock) 1 Symphyotrichum laeve (Smooth Aster) 1 Symphyotrichum novae-angliae (New England Aster) 4 Vernonia gigantea (Tall Ironweed) 0.5 Veronicastrum virginicum (Culver's Root) 48 05/10/2019 12 of 49 12/04/20 Lake Edge Enhancement 4 B. Wet-Mesic Community Temporary Matrix 32 lbs Avena sativa (Seed Oats) 5 lbs Lolium multiflorum (Annual Ryegrass) Permanent Matrix Grasses and Sedges Oz/acre 16 Andropogon gerardii (Big Bluestem) 2 Carex annectans xanthocarpa (Yellow Fox Sedge) 2 Carex frankii (Frank's Sedge) 6 Carex vulpinoidea (Fox Sedge) 32 Elymus canadensis (Canada Wild Rye) 32 Elymus virginicus (Virginia Wild Rye) 2 Glyceria striata (Fowl Manna Grass) 4 Panicum virgatum (Switchgrass) 16 Sorghastrum nutans (Indian Grass) 112 Forbs 1 Asclepias syriaca (Common Milkweed) 1 Baptisia alba (White False Indigo) 3 Coreopsis tripteris (Tall Coreopsis) 3 Echinacea purpurea (Purple Coneflower) 2 Eryngium yuccifolium (Rattlesnake Master) 0.5 Euthamia graminifolia (Grass-Leaved Goldernrod) 1 Helianthus grosseserratus (Sawtooth Sunflower) 4 Heliopsis helianthoides (False Sunflower) 2 Liatris spicata (Dense Blazing Star) 0.5 Monarda fistulosa (Bergamot) 1 Oligoneuron riddellii (Riddell's Goldenrod) 2 Oligoneuron rigidum (Stiff Goldenrod) 0.5 Penstemon digitalis (Foxglove Beardtongue) 0.5 Pycnanthemum virginianum (Mountain Mint) 4 Ratibida pinnata (Yellow Coneflower) 3 Rudbeckia fulgida speciosa (Showy Black-Eyed Susan) 05/10/2019 13 of 49 12/04/20 Lake Edge Enhancement 5 3 Rudbeckia hirta (Black-Eyed Susan) 3 Rudbeckia subtomentosa (Sweet Black-Eyed Susan) 3 Senna hebecarpa (Wild Senna) 2 Silphium integrifolium (Rosinweed) 4 Silphium terebinthinaceum (Prairie Dock) 0.5 Symphyotrichum firmum (Shining Aster) 1 Symphyotrichum novae-angliae (New England Aster) 2 Vernonia fasciculata (Smooth Ironweed) 0.5 Veronicastrum virginicum (Culver's Root) 48 B. Sedge Meadow Temporary Matrix 32 lbs Avena sativa (Seed Oats) 5 lbs Lolium multiflorum (Annual Ryegrass) Permanent Matrix Grasses and Sedges oz/acre 1 Carex comosa (Bristly Sedge) 1 Carex cristatella (Crested Sedge) 2 Carex frankii (Frank's Sedge) 2 Carex granularis (Meadow Sedge) 2 Carex hystericina (Porcupine Sedge) 2 Carex lurida (Lurid Sedge) 1 Carex tribuloides (Pointed Oval Sedge) 3 Carex vulpinoidea (Fox Sedge) 64 Elymus virginicus (Virginia Wild Rye) 2 Glyceria striata (Fowl Manna Grass) 2 Leersia oryzoides (Rice Cut Grass) 2 Panicum virgatum (Switchgrass) 1 Scirpus atrovirens (Dark Green Bulrush) 1 Spartina pectinata (Prairie Cordgrass) 86 Forbs 2 Angelica atropurpurea (Angelica) 1 Asclepias incarnata (Swamp Milkweed) 2 Boltonia latisquama (False Aster) 1 Eupatorium perfoliatum (Boneset) 1 Eutrochium maculatum (Spotted Joe-Pye Weed) 05/10/2019 14 of 49 12/04/20 Lake Edge Enhancement 6 3 Helenium autumnale (Autumn Sneezeweed) 1 Liatris spicata (Dense Blazing Star) 0.25 Lobelia cardinalis (Cardinal Flower) 0.25 Lobelia siphilitica (Great Blue Lobelia) 0.5 Mimulus ringens (Monkey Flower) 1 Oligoneuron riddellii (Riddell's Goldenrod) 1 Penstemon digitalis (Foxglove Beardtongue) 0.5 Pycnanthemum virginianum (Mountain Mint) 2 Rudbeckia fulgida speciosa (Showy Black-Eyed Susan) 2 Hibiscus moscheutos (Swamp Rose Mallow) 2 Rudbeckia subtomentosa (Sweet Black-Eyed Susan) 2 Senna hebecarpa (Wild Senna) 2 Silphium integrifolium (Rosinweed) 2 Silphium perfoliatum (Cupplant) 2 Silphium terebinthinaceum (Prairie Dock) 1 Solidago patula (Swamp Goldenrod) 0.5 Symphyotrichum firmum (Shining Aster) 0.5 Symphyotrichum novae-angliae (New England Aster) 0.5 Symphyotrichum puniceum (Swamp Aster) 1 Verbena hastata (Blue Vervain) 1 Vernonia fasciculata (Smooth Ironweed) 0.5 Veronicastrum virginicum (Culver's Root) 0.5 Zizia aurea (Golden Alexanders) 34 2.02 Plants Shallow Water Emergent Community Common Name Latin Name Size Sweet Flag (Acorus calamus) 2 3/8" X 3 3/4" deep pot Riverbank Tussock Sedge (Carex emoryi)* 2 3/8" X 3 3/4" deep pot Bristly Sedge (Carex Comosa) 2 3/8" X 3 3/4" deep pot Creeping Spike Rush (Eleocharis palustris)* 2 3/8" X 3 3/4" deep pot Blue Flag Iris (Iris virginica var shrevei)* 2 3/8" X 3 3/4" deep pot Soft Rush (Juncus effusus) 2 3/8" X 3 3/4" deep pot Water Willow (Justicia americana) 2 3/8" X 3 3/4" deep pot Common Arrowhead (Sagittaria latifolia) 2 3/8" X 3 3/4" deep pot Hardstem Bulrush (Schoenoplectus acutus) 2 3/8" X 3 3/4" deep pot Three-Square Bulrush (Schoenoplectus pungens) 2 3/8" X 3 3/4" deep pot Woolgrass (Scirpus cyperinus)* 2 3/8" X 3 3/4" deep pot Softstem Bulrush (Schoenoplectus tabernaemontani) 2 3/8" X 3 3/4" deep pot Giant Burreed (Sparganium eurycarpum) 2 3/8" X 3 3/4" deep pot 05/10/2019 15 of 49 12/04/20 Lake Edge Enhancement 7 Those species denoted with an asterisk (*) shall be installed at the shoreline. All others shall be installed in 2" to 6" of water. Deep Water Emergent or Floating Leaf Community Common Name Latin Name Size Yellow Pond Lily (Nuphar luteum) - Bare root White Water Lily (Nymphaea odorata) - Bare root 2.03 Accessories A. Waterfowl Exclusion 1. Posts - 6 foot lightweight fence posts or 6 foot length of #4 rebar. 2. Fence - 5 foot width. B. Sand - Dry, Coarse Sand that is free from chemical contamination. C. Erosion Control Blanket - North American Green SC-150 or equivalent Part 3 Execution 3.01 Examination A. Verify that a stable water level has been established in the detention pond. B. Verify that the surrounding uplands have been stabilized with the specified grass seed mix. 3.02 Preparation A. Two weeks (14 days) prior to installation, apply a glyphosate herbicide approved for use around water (Rodeo) to the area to kill existing lawn grasses and other vegetation. B. Following a complete kill of existing vegetation, begin installation by tilling area to be seeded to a depth of 3 inches. Till as close to the shoreline as soil moisture conditions permit. 3.03 Installation of waterfowl exclusion fence A. Place posts in 2' foot water depth at 15 foot intervals around the entire pond. Each post shall be driven approximately 1 foot into the pond bottom. 05/10/2019 16 of 49 12/04/20 Lake Edge Enhancement 8 B. Attach fence to posts with wire ties so that the fence extends to the pond bottom and at least 36 inches above the waters surface. 3.04 Installation of Plants A. All aquatic plants must be installed in the appropriate water depths between the waterfowl exclusion fence and the shore. 1. Deep water emergent or floating leaf plants shall be installed in 1 to f foot water depths. Place 3 plants per 10 lineal feet of community. 2. Shallow water emergent plants shall be installed in 2 to 6 inch water depths with the exception of shoreline species (noted with an asterisk in species list) which shall be installed at the water's edge. Place 1 plant per lineal feet of community. Evenly distribute each species around the pond, planting in groups of 3 to 5 plants of each species. B. All plants shall be installed by creating a hole with a spade or dibble, placing the plants in the hole and firmly packing the soil around them. Plants allowed to float to the surface following installation shall result in rejection of the installation. 3.05 Seeding A. Place a portion of the seed in a clean, dry 5 gallon bucket. Mix 2 parts coarse sand with 1 part seed. Thoroughly mix seed and sand. B. Hand broadcast seed/sand mixture across the specified tilled area. Apply half the seed/sand mixture over the entire area. Apply the second half over the same area utilizing the same procedure. This method prevents using all of the seed before the entire area is covered. C. Lightly firm seedbed with a roller where soil moisture permits. Do not roll areas where soil is moist enough to stick to the roller. D. Apply 1 width of erosion blanket starting just above the normal waterline. Secure with 2 staples per square yd 3.06 Protection A. Protect seeded areas with stakes and tape around area periphery. 3.07 Maintenance 05/10/2019 17 of 49 12/04/20 Lake Edge Enhancement 9 A. If weed growth exceeds ten inches in height in seeded communities, trim or mow to 4 inches. Do not cut plants in the emergent community. B. Maintain waterfowl exclusion fence for 1 year. At the end of that period, remove fence and posts. 3.08 Acceptance A. Planted Aquatic Communities - For acceptance at the end of the first growing season, the following condition shall be met. 1. 75% of the species planted shall be alive and present. 2. 50 % of the water surface in the shallow water community shall be covered with vegetation. 3. 25 % of the water surface in the floating leaf community shall be covered with vegetation. B. Seeded Native Communites - For acceptance at the beginning of the second growing season, the following conditions shall be met. 1. Coverage - 80 % of each plant community shall be covered with by vegetation. 2. Presence - 50 % of the species planted should be alive and present. 3. Abundance - 50 % of the vegetation should native species of the permanent matrix. Spence Restoration Nursery 2220 E. Fuson Road Muncie, IN 47302 Tel: (765) 286-7154 Fax: (765) 286-0264 www.spencenursery.com 05/10/2019 18 of 49 12/04/20 SUMP CATCH BASINS GRAMERCY, SECTION 2, 3 & 4 PURPOSE & BACKGROUND The BMP’s for Gramercy, Section 2, 3 & 4 are sump catch basins located at specified structures prior to or at the outlets of the BMP Basins – Structures #403 / 438 / 461 / 488 (see construction documents or BMP Location Map). The sump catch basins are storm structures constructed with a sump which serves as a sediment storage basin that can be accessed and cleaned out when necessary. Sump catch basins #403, 438 and 461 in Gramercy, Section 1 and #488 and #522 in Gramercy Section 2, 3 & 4 will be combined with a SNOUT – see SNOUT description and details. INSPECTION & MAINTENANCE ACTIVITIES The performance of a sump catch basin is highly dependant on the inspection and maintenance of the structure. If the structure is not properly maintained, the ability to remove pollutants will decrease. The BMP owner will need to provide the maintenance for the sediment removal. The BMP owner agrees to the following monthly inspection program: 1. Remove manhole lid or open pavement grate to expose inside of box structure. 2. Lower a dip stick equipped with a ball valve (Sludge Judge or similar device) into opened box structure. 3. Measure the depth of sedimentation. The level of sedimentation shall not exceed 12 inches before maintenance. 4. In the event that maintenance is required, call a local vactor company to remove sediments and other debris with a vacuum truck. Dispose of all waste in accordance with the City of Carmel and any applicable state, and/or federal requirements. EMERGENCY CONTACT INFORMATION Hamilton County Surveyor’s Office - (317) 776-8495 Carmel Fire Department - (317) 571-2600 Indiana Department of Environmental Management (IDEM) - (317) 356-2411 REFERENCES 1. Indiana Storm Water Quality Manual - October 2007 2. Hamilton County Stormwater Technical Standards Manual - January 2006 3. City of Carmel Stormwater Technical Standards Manual – July 2006 05/10/2019 19 of 49 12/04/20 SNOUT® GRAMERCY, SECTION 2, 3 & 4 SNOUT DESCRIPTION & DETAILS Another water quality feature for Gramercy, Section 2, 3 & 4 is the SNOUT system from Best Management Products, Inc. (BMP, Inc.) The SNOUT system is based on a vented hood that can reduce floatable trash and debris, free oils, and other solids from stormwater discharges. In its most basic application, a SNOUT hood is installed over the outlet pipe of a catch basin or other stormwater quality structure which incorporates a deep sump. The SNOUT forms a baffle in the structure which collects floatable debris and free oils on the surface of the captured stormwater, while permitting heavier solids to sink to the bottom of the sump. The clarified intermediate layer is forced out of the structure through the open bottom of the SNOUT by displacement from incoming flow. The resultant discharge contains considerably less unsightly trash and other gross pollutants, and can also offer reductions of free oils and finer solids. As with any structural stormwater quality BMP, design and maintenance considerations will have a dramatic impact on SNOUT system performance over the life of the facility. The most important factor to consider when designing structures which will incorporate a SNOUT is the depth of the sump. Simply put, the deeper the sump, the more effective the unit will be both in terms of pollutant removals and reducing frequency of maintenance. More volume in a structure means more quiescence, thus allowing the pollutant constituents a better chance to separate out. Secondly, more volume means fewer cycles between maintenance operations, because the structure has a greater capacity. Of equal importance to good performance is putting SNOUTs in every inlet whenever possible. The closer one captures pollution to where it enters the infrastructure, the less mixing of runoff there is, and easier it will be to separate out pollutants. Putting SNOUTs and deep sumps in every inlet develops a powerful structural treatment train with a great deal of effective storage volume where even finer particles may have a chance to settle out. The BMP owner will need to provide the maintenance for the sediment removal in the structures that incorporate the SNOUT system. The SNOUT system will be installed at Structure #’s 403, 438, 461, 488 & 522. Access to the BMP locations are designated along the drainage easements along Kinzer Way, north and east of the Wet Pond with Native Plantings, as well as to the west, off of Valentine Drive. Please refer to the SNOUT Inspection and Maintenance Activities in this manual for detailed descriptions of the maintenance requirements for the systems. SNOUT INSPECTION & MAINTENANCE ACTIVITIES BMP owners must routinely inspect the BMP(s) to verify that all BMP components are functioning as designed and are not in danger of failing. The BMP(s) need maintenance in order to function as water quality and quantity enhancements. At a minimum, the maintenance plan must include, but is not limited to: 1. Monthly monitoring for the first year of a new installation after the site has been stabilized. 2. Measurements should be taken after each rain event of 0.5 inches or more, or monthly, as determined by local weather conditions. 3. Checking sediment depth and noting the surface pollutants in the structure will be helpful in planning maintenance. 05/10/2019 20 of 49 12/04/20 4. The pollutants collected in SNOUT equipped structures will consist of floatable debris and oils on the surface of the captured water, and grit and sediment on the bottom of the structure. 5. It is best to schedule maintenance based on the solids collected in the sump. 6. At a minimum, the SNOUT should be maintained annually or when the sump is half full. 7. Structures should also be cleaned if a spill or other incident causes a larger than normal accumulation of pollutants in a structure. 8. Maintenance is best done with a vacuum truck. 9. If oil absorbent hydrophobic booms are being used in the structure to enhance hydrocarbon capture and removal, they should be checked on a monthly basis, and serviced or replaced when more than 2/3 of the boom is submerged, indicating a nearly saturated state. 10. All collected wastes must be handled and disposed of according to local environmental requirements. 11. To maintain the SNOUT hoods themselves, an annual inspection of the anti-siphon vent and access hatch are recommended. A simple flushing of the vent, or a gentle rodding with a flexible wire are all that’s typically needed to maintain the anti-siphon properties. Opening and closing the access hatch once a year ensures a lifetime of trouble-free service. Inspections must be documented on the inspection form included in this Operations and Maintenance Manual. 05/10/2019 21 of 49 12/04/20 ENGINEERED SOLUTIONS Vortechs® Operation and Maintenance 05/10/2019 22 of 49 12/04/20 2 Vortechs® The Vortechs system is a high-performance hydrodynamic separator that effectively removes finer sediment (e.g. 50-microns (µm), oil, and floating and sinking debris. The swirl concentration operation and flow controls work together to minimize turbulence and provide stable storage of captured pollutants. Precast models can treat peak design flows up to 30-cfs (850-L/s); cast-in-place models handle even greater flows. A typical system is sized to provide a specific removal efficiency of a predefined particle size distribution (PSD). Operation Overview Stormwater enters the swirl chamber inducing a gentle swirling flow pattern and enhancing gravitational separation. Sinking pollutants stay in the swirl chamber while floatables are stopped at the baffle wall. Vortechs systems are usually sized to efficiently treat the frequently occurring runoff events and are primarily controlled by the low flow control orifice. This orifice effectively reduces inflow velocity and turbulence by inducing a slight backwater that is appropriate to the site. During larger storms, the water level rises above the low flow control orifice and begins to flow through the high flow control. Any layer of floating pollutants is elevated above the invert of the Floatables Baffle Wall, preventing release. Swirling action increases in relation to the storm intensity, while sediment pile remains stable. When the storm drain is flowing at peak capacity, the water surface in the system approaches the top of the high flow control. The Vortechs system will be sized large enough so that previously captured pollutants are retained in the system, even during these infrequent events. As a storm subsides, treated runoff decants out of the Vortechs system at a controlled rate, restoring the water level to a dry- weather level equal to the invert of the inlet pipe. The low water level facilitates easier inspection and cleaning, and significantly reduces maintenance costs by reducing pump-out volume. 05/10/2019 23 of 49 12/04/20 6 Maintenance The Vortechs system should be inspected at regular intervals and maintained when necessary to ensure optimum performance. The rate at which the system collects pollutants will depend more heavily on site activities than the size of the unit, e.g., unstable soils or heavy winter sanding will cause the swirl chamber to fill more quickly but regular sweeping will slow accumulation. Inspection Inspection is the key to effective maintenance and is easily performed. Pollutant deposition and transport may vary from year to year and regular inspections will help ensure that the system is cleaned out at the appropriate time. Inspections should be performed twice per year (i.e. spring and fall) however more frequent inspections may be necessary in equipment washdown areas and in climates where winter sanding operations may lead to rapid accumulations. It is useful and often required as part of a permit to keep a record of each inspection. A simple inspection and maintenance log form for doing so is provided on the following page, and is also available on conteches.com. The Vortechs system should be cleaned when inspection reveals that the sediment depth has accumulated to within 12 to 18 inches (300 to 450 mm) of the dry-weather water surface elevation. This determination can be made by taking two measurements with a stadia rod or similar measuring device; one measurement from the manhole opening to the top of the sediment pile and the other from the manhole opening to the water surface. Note: To avoid underestimating the volume of sediment in the chamber, the measuring device must be carefully lowered to the top of the sediment pile. Finer, silty particles at the top of the pile typically offer less resistance to the end of the rod than larger particles toward the bottom of the pile. Cleaning Cleaning of the Vortechs system should be done during dry weather conditions when no flow is entering the system. Clean- out of the Vortechs system with a vacuum truck is generally the most effective and convenient method of excavating pollutants from the system. If such a truck is not available, a “clamshell” grab may be used, but it is difficult to remove all accumulated pollutants using a “clamshell”. In installations where the risk of petroleum spills is small, liquid contaminants may not accumulate as quickly as sediment. However, an oil or gasoline spill should be cleaned out immediately. Motor oil and other hydrocarbons that accumulate on a more routine basis should be removed when an appreciable layer has been captured. To remove these pollutants, it may be preferable to use adsorbent pads to solidify the oil since these pads are usually much easier to remove from the unit individually and less expensive to dispose of than the oil/water emulsion that may be created by vacuuming the oily layer. Floating trash can be netted out if you wish to separate it from the other pollutants. Cleaning of a Vortechs system is typically done by inserting a vacuum hose into the swirl chamber and evacuating this chamber of water and pollutants. As water is evacuated, the water level outside of the swirl chamber will drop to a level roughly equal to the crest of the lower aperture of the swirl chamber. The water outside the swirl chamber should remain near this level throughout pumping as the bottom and sides of the swirl chamber are sealed to the tank floor and walls. This “water lock” feature prevents water from migrating into the swirl chamber, exposing the bottom of the baffle wall and creating excess pump-out volume. Floating pollutants will decant into the swirl chamber as the water level is drawn down. This allows most floating material to be withdrawn from the same access point above the swirl chamber. Floating material that does not decant into the swirl chamber during draw down should be skimmed from the baffle chamber. If maintenance is not performed as recommended, sediment may accumulate outside the swirl chamber. If this is the case, it may be necessary to pump out other chambers. It is advisable to check for sediment accumulation in all chambers during inspection and maintenance. These maintenance recommendations apply to all Vortechs systems with the following exceptions: 1. It is strongly recommended that when cleaning systems larger than the Model 16000 the baffle chamber be drawn down to depth of three feet prior to beginning clean-out of the swirl chamber. Drawing down this chamber prior to the swirl chamber reduces adverse structural forces pushing upstream on the swirl chamber once that chamber is empty. 2. Entry into a Vortechs system is generally not required as cleaning can be done from the ground surface. However, if manned entry into a system is required the entire system should be evacuated of water prior to entry regardless of the system size. Manhole covers should be securely seated following cleaning activities to prevent leakage of runoff into the system from above and also to ensure proper safety precautions. If anyone physically enters the unit, Confined Space Entry procedures need to be followed. Disposal of all material removed from the Vortechs system should be done in accordance with local regulations. In many locations, disposal of evacuated sediments may be handled in the same manner as disposal of sediments removed from catch basins or deep sump manholes. Check your local regulations for specific requirements on disposal. Contech has created a network of Certified Maintenance Providers (CCMP’s) to provide maintenance on Vortechs systems. To find a CCMP in your area please visit www.conteches.com/ maintenance. 05/10/2019 24 of 49 12/04/20 800-338-1122 www.conteches.com ENGINEERED SOLUTIONS Support • Drawings and specifications are available at www.conteches.com. • Site-specific design support is available from our engineers. © 2015 Contech Engineered Solutions LLC Contech Engineered Solutions LLC provides site solutions for the civil engineering industry. Contech’s portfolio includes bridges, drainage, sanitary sewer, stormwater, earth stabilization and wastewater treatment products. For information on other Contech division offerings, visit conteches.com or call 800.338.1122 NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS AN EXPRESSED WARRANTY OR AN IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. SEE THE CONTECH STANDARD CONDITION OF SALES (VIEWABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION. The product(s) described may be protected by one or more of the following US patents: 5,322,629; 5,624,576; 5,707,527; 5,759,415; 5,788,848; 5,985,157; 6,027,639; 6,350,374; 6,406,218; 6,641,720; 6,511,595; 6,649,048; 6,991,114; 6,998,038; 7,186,058; 7,296,692; 7,297,266; related foreign patents or other patents pending. vx_manual 04/15 PDF Revision 05/10/2019 25 of 49 12/04/20 CDS® Inspection and Maintenance Guide – Indiana ENGINEERED SOLUTIONS 05/10/2019 26 of 49 12/04/20 Maintenance The CDS system should be inspected at regular intervals and maintained when necessary to ensure optimum performance. The rate at which the system collects pollutants will depend more heavily on site activities than the size of the unit. For example, unstable soils or heavy winter sanding will cause the grit chamber to fill more quickly but regular sweeping of paved surfaces will slow accumulation. Inspection Inspection is the key to effective maintenance and is easily performed. Pollutant transport and deposition may vary from year to year and regular inspections will help ensure that the system is cleaned out at the appropriate time. At a minimum, inspections should be performed twice per year (e.g. spring and fall) however more frequent inspections may be necessary in climates where winter sanding operations may lead to rapid accumulations, or in equipment washdown areas. Installations should also be inspected more frequently where excessive amounts of trash are expected. The visual inspection should ascertain that the system components are in working order and that there are no blockages or obstructions in the inlet and separation screen. The inspection should also quantify the accumulation of hydrocarbons, trash, and sediment in the system. Measuring pollutant accumulation can be done with a calibrated dipstick, tape measure or other measuring instrument. If absorbent material is used for enhanced removal of hydrocarbons, the level of discoloration of the sorbent material should also be identified during inspection. It is useful and often required as part of an operating permit to keep a record of each inspection. A simple form for doing so is provided. Access to the CDS unit is typically achieved through two manhole access covers. One opening allows for inspection and cleanout of the separation chamber (cylinder and screen) and isolated sump. The other allows for inspection and cleanout of sediment captured and retained outside the screen. For deep units, a single manhole access point would allows both sump cleanout and access outside the screen. The CDS system should be cleaned when the level of sediment has reached 75% of capacity in the isolated sump or when an appreciable level of hydrocarbons and trash has accumulated. If absorbent material is used, it should be replaced when significant discoloration has occurred. Performance will not be impacted until 100% of the sump capacity is exceeded however it is recommended that the system be cleaned prior to that for easier removal of sediment. The level of sediment is easily determined by measuring from finished grade down to the top of the sediment pile. To avoid underestimating the level of sediment in the chamber, the measuring device must be lowered to the top of the sediment pile carefully. Particles at the top of the pile typically offer less resistance to the end of the rod than consolidated particles toward the bottom of the pile. Once this measurement is recorded, it should be compared to the as-built drawing for the unit to determine weather the height of the sediment pile off the bottom of the sump floor exceeds 75% of the total height of isolated sump. Cleaning Cleaning of a CDS systems should be done during dry weather conditions when no flow is entering the system. The use of a vacuum truck is generally the most effective and convenient method of removing pollutants from the system. Simply remove the manhole covers and insert the vacuum hose into the sump. The system should be completely drained down and the sump fully evacuated of sediment. The area outside the screen should also be cleaned out if pollutant build-up exists in this area. In installations where the risk of petroleum spills is small, liquid contaminants may not accumulate as quickly as sediment. However, the system should be cleaned out immediately in the event of an oil or gasoline spill should be cleaned out immediately. Motor oil and other hydrocarbons that accumulate on a more routine basis should be removed when an appreciable layer has been captured. To remove these pollutants, it may be preferable to use absorbent pads since they are usually less expensive to dispose than the oil/water emulsion that may be created by vacuuming the oily layer. Trash and debris can be netted out to separate it from the other pollutants. The screen should be power washed to ensure it is free of trash and debris. Manhole covers should be securely seated following cleaning activities to prevent leakage of runoff into the system from above and also to ensure that proper safety precautions have been followed. Confined space entry procedures need to be followed if physical access is required. Disposal of all material removed from the CDS system should be done in accordance with local regulations. In many jurisdictions, disposal of the sediments may be handled in the same manner as the disposal of sediments removed from catch basins or deep sump manholes. 05/10/2019 27 of 49 12/04/20 800.925.5240 www.ContechES.com Support • Drawings and specifications are available at www.contechstormwater.com. • Site-specific design support is available from our engineers. ©2014 Contech Engineered Solutions LLC Contech Engineered Solutions LLC provides site solutions for the civil engineering industry. Contech’s portfolio includes bridges, drainage, sanitary sewer, stormwater, earth stabilization and wastewater treament products. For information, visit www.ContechES.com or call 800.338.1122 NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS AN EXPRESSED WARRANTY OR AN IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. SEE THE CONTECH STANDARD CONDITION OF SALES (VIEWABLE AT WWW.CONTECHES.COM/ COS) FOR MORE INFORMATION. The product(s) described may be protected by one or more of the following US patents: 5,322,629; 5,624,576; 5,707,527; 5,759,415; 5,788,848; 5,985,157; 6,027,639; 6,350,374; 6,406,218; 6,641,720; 6,511,595; 6,649,048; 6,991,114; 6,998,038; 7,186,058; 7,296,692; 7,297,266; 7,517,450 related foreign patents or other patents pending. cdsMaintenance-Indy 08/14 ENGINEERED SOLUTIONS CDS MODel DIAMeTer DISTAnCe FrOM WS TO TOP OF SeD PIle SeD STOrAge CAPACITy ft m ft m yd3 m3 CDS-4 4 1.2 3.0 0.9 0.7 0.2 CDS-6 6 1.8 5.0 1.5 1.6 0.5 CDS-7 7 2.1 5.3 1.6 3.2 1.0 CDS-8 8 2.4 6.3 1.9 4.2 1.3 CDS-10 10 3.0 9.8 3.0 6.5 2.0 Table 1: CDS Maintenance Indicators and Sediment Storage Capacities 05/10/2019 28 of 49 12/04/20 APPENDIX B 05/10/2019 29 of 49 12/04/20 05/10/2019 30 of 49 12/04/20 05/10/2019 31 of 49 12/04/20 05/10/2019 32 of 49 12/04/20 05/10/2019 33 of 49 12/04/20 05/10/2019 34 of 49 12/04/20 05/10/2019 35 of 49 12/04/20 05/10/2019 36 of 49 12/04/20 05/10/2019 37 of 49 12/04/20 (19'-0")7'-0" (3') (13'-0")18'-0"12'-0"PLAN VIEW SECTION B-BSECTION A-AALUMINUM SWIRLCHAMBERBAFFLE WALLINLETINV. ELEV. 833.25'OUTLETINV. ELEV. 833.20'RIM ELEV. 842.18'CONTRACTOR TOGROUT TO FINISHEDGRADE8' 11"PERMANENT POOL ELEV.CONTRACTOR TO PROVIDEGRADE RING/RISERFRAME AND COVERTYP. OF 3(1'-8")INLET PIPEØ18" RCPFLOW 90°(6'-6") (13'-4")INLET FLOW CONTROL WALLTOP AND SIDESSEALED TO VAULTWEIR AND ORIFICEPLATES OUTLETØ18" RCP (1'-8") OUTLET AA B BLS/LSTHIS PRODUCT MAY BE PROTECTED BY THE FOLLOWINGU.S. PATENT: 5,759,415; RELATED FOREIGN PATENTS.GENERAL NOTES1. CONTECH TO PROVIDE ALL MATERIALS UNLESS NOTED OTHERWISE.2. DIMENSIONS MARKED WITH ( ) ARE REFERENCE DIMENSIONS. ACTUAL DIMENSIONS MAY VARY.3. FOR FABRICATION DRAWINGS WITH DETAILED VAULT DIMENSIONS AND WEIGHT, PLEASE CONTACT YOURCONTECH ENGINEERED SOLUTIONS LLC REPRESENTATIVE. www.ContechES.com4. VORTECHS WATER QUALITY VAULT SHALL BE IN ACCORDANCE WITH ALL DESIGN DATA AND INFORMATIONCONTAINED IN THIS DRAWING.5. STRUCTURE SHALL MEET AASHTO HS20 AND CASTINGS SHALL MEET AASHTO M306 LOAD RATING, ASSUMINGEARTH COVER OF 0' - 5', AND GROUNDWATER ELEVATION AT, OR BELOW, THE OUTLET PIPE INVERT ELEVATION.ENGINEER OF RECORD TO CONFIRM6. ACTUAL GROUNDWATER ELEVATION.7. WATER SURFACE ELEVATION IN THE VORTECHS SYSTEM IS EXPECTED TO BE AT OR BELOW TOP OF FLOWCONTROL WALL DURING THE DESIGN STORM.8. GROUND WATER ELEVATION ASSUMED AT INLET PIPE INVERT.INSTALLATION NOTES1. ANY SUB-BASE, BACKFILL DEPTH, AND/OR ANTI-FLOTATION PROVISIONS ARE SITE-SPECIFIC DESIGNCONSIDERATIONS AND SHALL BE SPECIFIED BY ENGINEER OF RECORD.2. CONTRACTOR TO PROVIDE EQUIPMENT WITH SUFFICIENT LIFTING AND REACH CAPACITY TO LIFT AND SET THEVORTECHS VAULT (LIFTING CLUTCHES PROVIDED).3. CONTRACTOR TO INSTALL JOINT SEALANT BETWEEN ALL VAULT JOINTS AND ASSEMBLE VAULT.4. CONTRACTOR TO PROVIDE, INSTALL, AND GROUT PIPES. MATCH PIPE INVERTS WITH ELEVATIONS SHOWN.5. CONTRACTOR TO PROVIDE ANY EXTERNAL BYPASS VAULTS REQUIRED FOR OFFLINE LAYOUT (UNLESSOTHERWISE SPECIFIED. CONTRACTOR TO PROVIDE AND INSTALL MANHOLE RISERS, GRADE RINGS OR BLOCK REQUIRED BETWEEN THETOP OF THE VORTECHS SYSTEM AND THE BASE OF THE MANHOLE FRAMES. TOP SLAB OPENING DIAMETERMAY BE DIFFERENT FROM THOSE SHOWN.STRUCTURE WEIGHTAPPROXIMATE HEAVIEST PICK = 56000 LBS. COUNT DESCRIPTION INSTALLED BYMATERIALS LIST - PROVIDED BY CONTECHCONTECHCONTECHCONTECHCONTECHALUMINUM SWIRL CHAMBER 1 ALUMINUM WEIR PLATE 1 ALUMINUM ORIFICE PLATE 1 SWIRL CHAMBER SEALANT 1 CONTRACTORSEALANT FOR JOINTS 1 CONTRACTORØ24" x 4" FRAME AND COVER 3 NORWALKPROPOSALCONTECHDRAWING800-338-1122 513-645-7000 513-645-7993 FAX9025 Centre Pointe Dr., Suite 400, West Chester, OH 4506908/07/18DATE:APPROVED:PROJECT NUMBER:KMS CHECKED: SHEET:I:\MERLIN\PROJECT\ACTIVE\593900\593976\593976-20-VORTECHS\DRAWINGS\PRE-593976-020-VX16000 PRO-A.DWG 8/8/2018 8:40 AMOF LMHDRAWN:DESIGNED: KMS 593976KMS#The design and information shown on this drawing isprovided as a service to the project owner, engineerand contractor by Contech Engineered Solutions LLC("Contech"). Neither this drawing, nor any part thereof,may be used, reproduced or modified in any mannerwithout the prior written consent of Contech. Failure tocomply is done at the user's own risk and Contechexpressly disclaims any liability or responsibility forsuch use.If discrepancies between the supplied informationupon which the drawing is based and actual fieldconditions are encountered as site work progresses,these discrepancies must be reported to Contechimmediately for re-evaluation of the design. Contechaccepts no liability for designs based on missing,incomplete or inaccurate information supplied byothers.www.ContechES.com1 REVISION DESCRIPTION DATE MARK BY THIS PRODUCT MAY BE PROTECTED BY THE FOLLOWINGU.S. PATENT: 5,759,415; RELATED FOREIGN PATENTS.VORTECHS 16000 - 593976-020GRAMERCY SECTION 1CARMEL, INSITE DESIGNATION: 422 B- BYPASS STRUCTURE INFORMATION -- NOT SUPPLIED BY CONTECH CONSTRUCTION PRODUCTS -BYPASS STRUCTURE = 4' DIA.BYPASS WEIR CREST LENGTH = 4'BYPASS WEIR CREST ELEVATION = 835.40'05/10/2019 38 of 49 12/04/20 972-590-2000 972-590-2039 FAXRIM ELEV. = 843.59 ±TOP OF STRUCTUREELEV. = 842.99OUTSIDE BOTTOMELEV. 826.07INLET PIPE 1INV. ELEV. = 835.01OUTLET PIPE 1INV. ELEV. = 834.91AAELEVATION VIEWOIL BAFFLESEPARATIONSCREENSOLIDS STORAGESUMPINLET 1Ø18" RCP(Ø28" OPENING)OUTLET 1Ø18" RCP(Ø28" OPENING)PERMANENTPOOL ELEV.FIBERGLASSSEPARATIONCYLINDER & INLETCONTRACTOR TO GROUT TOFINISHED GRADE3'-5"4'-0"8'-814"8'-10" 714"4'-1" Ø8'-4"2'-4"INLET 1 OUTLET 1Ø7' I.D.Ø8'-4" O.D.PLAN VIEW (2) Ø24" x 4"FRAME AND COVER FIBERGLASS INLET,AND CYLINDERCENTER OF CDS STRUCTURE,SCREEN AND SUMP OPENING1'-5" OFFSET 1'-5" OFFSETSECTION A-APROPOSALCONTECHDRAWINGREVISION DESCRIPTION DATE BYMARK CDS3535-7-C - 619478-10GRAMERCY SECTION 234CARMEL, INfor SYSTEM: STR. 485BGENERAL NOTES1. CONTECH TO PROVIDE ALL MATERIALS UNLESS NOTED OTHERWISE.2. FOR FABRICATION DRAWINGS WITH DETAILED STRUCTURE DIMENSIONS AND WEIGHT, PLEASE CONTACT YOUR CONTECHENGINEERED SOLUTIONS LLC REPRESENTATIVE. www.ContechES.com3. CDS WATER QUALITY STRUCTURE SHALL BE IN ACCORDANCE WITH ALL DESIGN DATA AND INFORMATION CONTAINED IN THISDRAWING. CONTRACTOR TO CONFIRM STRUCTURE MEETS REQUIREMENTS OF PROJECT.4. STRUCTURE SHALL MEET AASHTO HS-20 LOAD RATING, ASSUMING EARTH COVER OF 0' - 2', AND GROUNDWATER ELEVATION AT, ORBELOW, THE OUTLET PIPE INVERT ELEVATION. ENGINEER OF RECORD TO CONFIRM ACTUAL GROUNDWATER ELEVATION. CASTINGSSHALL MEET AASHTO M306 AND BE CAST WITH THE CONTECH LOGO.5. IF REQUIRED, PVC HYDRAULIC SHEAR PLATE IS PLACED ON SHELF AT BOTTOM OF SCREEN CYLINDER. REMOVE AND REPLACE AS NECESSARY DURING MAINTENANCE CLEANING.6. CDS STRUCTURE SHALL BE PRECAST CONCRETE CONFORMING TO ASTM C-478 AND AASHTO LOAD FACTOR DESIGN METHOD.INSTALLATION NOTESA. ANY SUB-BASE, BACKFILL DEPTH, AND/OR ANTI-FLOTATION PROVISIONS ARE SITE-SPECIFIC DESIGN CONSIDERATIONS AND SHALLBE SPECIFIED BY ENGINEER OF RECORD.B. CONTRACTOR TO PROVIDE EQUIPMENT WITH SUFFICIENT LIFTING AND REACH CAPACITY TO LIFT AND SET THE CDS MANHOLESTRUCTURE.C. CONTRACTOR TO INSTALL JOINT SEALANT BETWEEN ALL STRUCTURE SECTIONS AND ASSEMBLE STRUCTURE.D. CONTRACTOR TO PROVIDE, INSTALL, AND GROUT INLET AND OUTLET PIPE(S). MATCH PIPE INVERTS WITH ELEVATIONS SHOWN. ALLPIPE CENTERLINES TO MATCH PIPE OPENING CENTERLINES.E. CONTRACTOR TO TAKE APPROPRIATE MEASURES TO ASSURE UNIT IS WATER TIGHT, HOLDING WATER TO FLOWLINE INVERTMINIMUM. IT IS SUGGESTED THAT ALL JOINTS BELOW PIPE INVERTS ARE GROUTED.STRUCTURE WEIGHTAPPROXIMATE HEAVIEST PICK = 24000 LBS.STRUCTURE IS DELIVERED IN 4 PIECESMAX FOOTPRINT = Ø8'-4" NCILAYOUT 1A3535-7-FGIS5824 / NORW1005/07/19DATE:APPROVED:BAB CHECKED: SHEET:I:\MERLIN\PROJECT\ACTIVE\619400\619478\619478-10-CDS\DRAWINGS\PRE-619478-10-CDS3535-7 CONFAB.DWG 5/7/2019 9:56 AMOF BABDRAWN:DESIGNED: The design and information shown on this drawing isprovided as a service to the project owner, engineer andcontractor by CONTECH Construction Products Inc. orone of its affiliated companies ("CONTECH"). Neitherthis drawing, nor any part thereof, may be used,reproduced or modified in any manner without the priorwritten consent of CONTECH. Failure to comply isdone at the user's own risk and CONTECH expresslydisclaims any liability or responsibility for such use.If discrepancies between the supplied information uponwhich the drawing is based and actual field conditionsare encountered as site work progresses, thesediscrepancies must be reported to CONTECHimmediately for re-evaluation of the design. CONTECHaccepts no liability for designs based on missing,incomplete or inaccurate information supplied by others.BAB 619478 ----SEQUENCE No.:10PROJECT No.: SCALE:1 13/16" = 1'-0"Ɣ INTERNAL COMPONENTS TO BEINSTALLED BY CONTECH FIELD CONSULTANT ON SITEMATERIAL LIST (PROVIDED BY CONTECH)COUNT DESCRIPTION INSTALLED BY1 FIBERGLASS INLET AND CYLINDER CONTECH1 2400 micron, 3.5' O.D. x 3.58' SEP. SCREEN CONTECH1 SEALANT FOR JOINTS (BY PRECASTER) CONTRACTOR2 Ø24" x 4" FRAME & COVER, EJ#41600389, OR EQUIV. CONTRACTOR05/10/2019 39 of 49 12/04/20                05/10/2019 40 of 49 12/04/20 APPENDIX C 05/10/2019 41 of 49 12/04/20 05/10/2019 42 of 49 12/04/20 05/10/2019 43 of 49 12/04/20 DATE SUMP CATCH BASIN BMP INSPECTION CHECKLIST STRUCTURE NO. STRUCTURE CONDITION (poor, fair, good) SEDIMENTATION LEVEL (in.)(total # structures = XX) 05/10/2019 44 of 49 12/04/20 SNOUT® STORMWATER QUALITY IMPROVEMENT SYSTEM Operations and Maintenance Inspection Checklist INSPECTOR NAME: COMPANY/AGENCY: INSPECTION DATE: PROJECT NAME: SITE CONTACT: PHONE NUMBER: EMAIL ADDRESS: Inspection and Maintenance shall be performed monthly and/or after a rainfall event of 0.5 inches or more. Sediment removal shall be performed when sump in structure is half full. A vacuum truck shall be used to perform the sediment removal. STRUCTURE NO. MEASURED SEDIMENT DEPTH (in.) IS SEDIMENT REMOVAL REQUIRED? (Y or N) NOTES: Maintenance shall also include the inspection of the anti-siphon vent and access hatch to ensure proper working conditions. 05/10/2019 45 of 49 12/04/20 Vortechs Inspection & Maintenance Log 7 1. The water depth to sediment is determined by taking two measurements with a stadia rod: one measurement from the manhole opening to the top of the sediment pile and the other from the manhole opening to the water surface. If the difference between these measurements is less than eighteen inches the system should be cleaned out. Note: To avoid underestimating the volume of sediment in the chamber, the measuring device must be carefully lowered to the top of the sediment pile. 2. For optimum performance, the system should be cleaned out when the floating hydrocarbon layer accumulates to an appreciable thickness. In the event of an oil spill, the system should be cleaned immediately. Date Water depth to sediment Floatable layer thickness Describe maintenance performed Maintenance personnel Comments Vortech Model: ________________________________ Location: _______________________________________________________ 05/10/2019 46 of 49 12/04/20 CDS Inspection & Maintenance Log CDS Model: Location: Water Floatable Describe Maintenance Date depth to Layer Maintenance Personnel Comments sediment1 Thickness2 Performed —————————————————————————————————————————————————————————— —————————————————————————————————————————————————————————— —————————————————————————————————————————————————————————— —————————————————————————————————————————————————————————— —————————————————————————————————————————————————————————— —————————————————————————————————————————————————————————— —————————————————————————————————————————————————————————— —————————————————————————————————————————————————————————— —————————————————————————————————————————————————————————— —————————————————————————————————————————————————————————— —————————————————————————————————————————————————————————— —————————————————————————————————————————————————————————— —————————————————————————————————————————————————————————— —————————————————————————————————————————————————————————— 1. The water depth to sediment is determined by taking two measurements with a stadia rod: one measurement from the manhole opening to the top of the sediment pile and the other from the manhole opening to the water surface. If the difference between these measurements is less than the values listed in table 1 the system should be cleaned out. Note: to avoid underestimating the volume of sediment in the chamber, the measuring device must be carefully lowered to the top of the sediment pile. 2. For optimum performance, the system should be cleaned out when the floating hydrocarbon layer accumulates to an appreciable thickness. In the event of an oil spill, the system should be cleaned immediately.05/10/2019 47 of 49 12/04/20 APPENDIX D 05/10/2019 48 of 49 12/04/20 BMP OWNER ACKNOWLEDGMENT GRAMERCY, SECTION 2, 3 & 4 ACKNOWLEDGMENT AGREEMENT For good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the undersigned owner MoHawk WB, LLC. hereby submits this Operation and Maintenance Manual (“Manual”) to the City of Carmel (“City”) as a written acknowledgement of the Owner’s warranty and agreement to institute, maintain, and follow the water quality Best Management Practices (“BMP’s”) 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 BMP’s 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. BMP LIST: Wet Pond with Native Banks Vortechs Water Quality Unit: Structure #422A/422B Contech CDS Water Quality Unit: Structure # 485B Sumps/SNOUTs: Structure #403, 461, 438, 488, 522 Owner Signature Date Printed 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/Agent subscribed and sworn before me this day of , . County of Residence Signature Commission Expiration Date Printed Name 05/10/2019 49 of 49 12/04/20