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HomeMy WebLinkAboutO&M Manual3850 Priority Way South Drive, Suite 110 Indianapolis, IN. 46240 Phone: 317-779-2194 Operations and Maintenance Manual for Dreyer and Reinbold Racing Addition Carmel, Indiana DREYER AND REINBOLD RACING CARMEL, IN Prepared By: SPACECO Inc. Indianapolis, IN PH: 317-779-2194 Contact: Dillon Reynolds, PE SPACECO PROJECT#: ORIGINAL DATE: LAST REVISED: 12119 05/02/2023 1 | P a g e INTRODUCTION The City of Carmel has adopted a policy for stormwater quality enhancement through the management of total suspended solids (TSS) including floatables. The water quality management program is based on the performance of approved structural Best Management Practices (BMP) to remove 80% of total suspended solids (TSS) from the first flush of runoff. Design requirements and parameters may be found in the City of Carmel Stormwater Management requirements in Chapter 700 of the technical standards. PROJECT DESCRIPTION The proposed improvements for the Dreyer and Reinbold Racing Addition project includes a ±10,440 square foot building addition with minor drainage improvements. This development will utilize sheet drainage, sag inlets, a storm sewer system, and an existing dry detention basin to control stormwater runoff before discharging from the site. Most of the infrastructure is already in place. PURPOSE AND PERFORMANCE To achieve the 80% target removal rate of TSS from the stormwater runoff associated with the proposed improvements, a hydrodynamic separator will provide the required water quality treatment flow based on the calculation steps provided in Chapter 700 of the City stormwater ordinance. Contech’s Cascade Separator was selected as the chosen device. WATER QUALITY MAINTENANCE As part of the Water Quality Program, The City of Carmel is also requiring a maintenance and inspection program by the owner for the on-site BMP(s). The owner contact information is below: Owner: DJ Reinbold Realty LLC Address: 9375 Whitley Dr, Indianapolis, IN 46240 Contact: Chase Selman Telephone: 317-824-0113 Email: cselman@dreyerreinbold.com Note that DJ Reinbold Realty LLC will be responsible for the maintenance of the BMP. MAINTENANCE AND INSPECTIONS Routine inspections, maintenance, and the costs necessary for the maintenance and repair of the BMP are the responsibility of the owner. The City of Carmel must be notified of any changes in ownership, major repairs, or failure in writing within 30 days. 2 | P a g e The following are the recommended inspection items and timeframes for various items. INLET, CATCH BASIN, AND MANHOLE MAINTENANCE Inspect inlet castings monthly and after each rainfall event. More frequent inspections should be performed in areas where there is higher potential for trash or litter and during the fall when leaves are present on the ground. Inspect structures two times per year (preferably in spring and fall) to ensure that the structures are working in their intended fashion and that they are free of debris. Clean structures when sediment depths reach ¼ of the pipe diameter with a maximum of 6-inches. At a minimum, remove floating debris at the time of the inspection. Sediment from cleaning procedures should not be dumped into a sanitary sewer but disposed of in accordance with all federal, state, and local requirements. Periodic maintenance and inspections of the storm sewer network will reduce stormwater runoff pollution. Inspect Inlets for debris and sediment. Remove debris and sediment and dispose of properly. Properly cleanup and/or report any chemical spills. Minimize fertilizer, pesticide and herbicide applications. Avoid applying before any rain event. Property owner shall keep the site free from litter, woody growth, and shall mow the property when needed, but average grass blade height is not to exceed five (5) inches. CONVEYANCE MAINTENANCE (PIPES, SWALES, DITCHES) Storm Sewers Inspect storm sewers monthly and after each rainfall event. More frequent inspections should be performed in areas where there is higher potential for trash or litter and during the fall when leaves are present on the ground. Clean storm sewers when sediment depths reach ¼ of the pipe diameter with a maximum of 6-inches. Flowlines Inspect flowlines monthly and after each rainfall event to ensure they are working in their intended fashion and that they are free of sediment and debris. Remove any obstructions to flow, including accumulated sediments, debris, and vegetated growth. Flowlines to remain unobstructed from buildings, fences, and have a uniform slope. Vegetated Areas Property owner shall keep the site free from litter, woody growth, and shall mow the property when needed, but average grass blade height is not to exceed five (5) inches. Concrete and Hard Surfaces Clear accumulations of winter sand on hard surfaces and along walks and pavement at least once a year, preferably in the spring. Accumulations on may be removed by sweeping. Access routes, including roadways and sidewalks, shall be inspected annually and maintained as needed. 3 | P a g e Maintenance Item Inspection Frequency Maintenance Swales and Ditches 1) Vegetation Monthly and after major storm events Reseed, fertilize and mow as needed. Mowing shall not blow excess clippings into the detention area. Remove invasive vegetation when it adversely affects the ability of the system to perform as a water quality control device. 2) Animal burrows Annually Remove animals and fill burrows when it adversely affects the ability of the system to perform as a water quality control device. 3) Underdrains Annually Clear blockages if any. 4) Vegetative health Annually Replace/replant dead vegetation. Pipes Type: Reinforced concrete 1) Outfall concrete end section Monthly and after major storm events Remove blockage, debris, and sediment that collect in front of end sections. Flexamat 1) Flexamat Monthly and after major storm events Remove collected debris and any vegetation on Flexamat. Replace any Flexamat that has been lost or damaged. Inlets 1) Proposed Inlets Monthly and after major storm events Remove any debris from inlet castings Remove sediment: maximum sediment depth no more than ¼ diameter of pipe with maximum depth of 6”. Wet Detention Ponds 1) Entire Pond Semi-annually and after rainfall events >1.5” Remove debris and sediment 2) Perimeter of Basin Semi-annually and after rainfall events >1.5” Regrade soil if gullies form and replant ground Maintain vegetation at a height of approximately six inches 3) Inlet/Outlet devices: pipe or swale Semi-annually and after rainfall events >1.5” Unclog pipe and dispose of sediment off-site Replace or repair cracked pipes Regrade swale if necessary due to erosion 4 | P a g e APPENDIX A SITE EXHIBITS BMP LOCATION 5 | P a g e APPENDIX B MECHANICAL SEPARATOR OPERATIONS AND MAINTENANCE MANUAL Cascade Separator™ Inspection and Maintenance Guide ENGINEERED SOLUTIONS Maintenance The Cascade Separator™ system should be inspected at regular intervals and maintained when necessary to ensure optimum performance. The rate at which the system collects sediment and debris will depend upon on-site activities and site pollutant characteristics. For example, unstable soils or heavy winter sand- ing will cause the sediment storage sump to fill more quickly but regular sweeping of paved surfaces will slow accumulation. Inspection Inspection is the key to effective maintenance and is easily per- formed. 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, inspec- tions should be performed twice per year (i.e. spring and fall). However, more frequent inspections may be necessary in climates where winter sanding operations may lead to rapid accumula- tions, or in equipment wash-down areas. Installations should also be inspected more frequently where excessive amounts of trash are expected. A visual inspection should ascertain that the system components are in working order and that there are no blockages or obstruc- tions in the inlet chamber, flumes or outlet channel. The inspec- tion should also quantify the accumulation of hydrocarbons, trash and sediment in the system. Measuring pollutant accumu- lation 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 in this Inspection and Maintenance Guide. Access to the Cascade Separator unit is typically achieved through one manhole access cover. The opening allows for inspection and cleanout of the center chamber (cylinder) and sediment storage sump, as well as inspection of the inlet chamber and slanted skirt. For large units, multiple manhole covers allow access to the chambers and sump. The Cascade Separator system should be cleaned before the level of sediment in the sump reaches the maximum sediment depth and/or when an appreciable level of hydrocarbons and trash has accumulated. If sorbent material is used, it must be replaced when significant discoloration has occurred. Performance may be impacted when maximum sediment storage capacity is exceeded. Contech recommends maintaining the system when sediment level reaches the 50% storage volume. 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. 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. Once this measurement is recorded, it should be compared to the as-built drawing for the unit to determine if the height of the sediment pile off the bottom of the sump floor exceeds 50% of the total height of sediment storage sump. Cleaning Cleaning of a Cascade Separator system 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 con- venient method of removing pollutants from the system. Simply remove the manhole cover and insert the vacuum hose down through the center chamber and into the sump. The system should be completely drained down and the sump fully evacu- ated of sediment. The areas outside the center chamber and the slanted skirt should also be washed off if pollutant build-up exists in these areas. In installations where the risk of petroleum spills is small, liquid contaminants may not accumulate as quickly as sediment. How- ever, the system should be cleaned out immediately in the event of an oil or gasoline spill. 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 net- ted out to separate it from the other pollutants. Then the system 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 to ensure proper safety precautions. Confined space entry procedures need to be followed if physical access is required. Disposal of all material removed from the Cascade Separator system must be done is 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. If any components are dam- aged, replacement parts can be ordered from the manufacturer. Cascade Separator Inspection & Maintenance Log Cascade Model:Location: Date Water Depth to Sediment1 Floatable Layer Thickness2 Describe Maintenance Performed Maintenance Personnel Comments 1. The depth to sediment is determined by taking a measurement from the manhole opening to the top of the sediment pile. Once this measurement is recorded, it should be compared to the as-built drawing for the unit to determine if the height of the sediment pile off the bottom of the sump floor exceeds 50% of the total height of sediment storage sump. 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. 800.925.5240 www.ContechES.com SUPPORT • Drawings and specifications are available at www.ContechES.com. • Site-specific design support is available from our engineers. ©2018 Contech Engineered Solutions LLC, a QUIKRETE Company Contech Engineered Solutions LLC provides site solutions for the civil engineering industry. Contech’s portfolio includes bridges, drainage, sanitary sewer, stormwater, and earth stabilization products. For information, visit www.ContechES.com or call 800.338.1122 NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH. SEE CONTECH’S CONDITIONS OF SALE (AVAILABLE AT WWW.CONTECHES.COM/COS) FOR MORE INFORMATION. Cascade Separator Maintenance 9/18 ENGINEERED SOLUTIONS A vacuum truck excavates pollutants from the systems.A Cascade Separator unit can be easily cleaned in less than 30 minutes. 6 | P a g e APPENDIX C OWNER AUTHORIZATION Owner Acknowledgement Agreement (“Agreement”) For good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the undersigned owner (“Owner”) hereby submits this Operation and Maintenance Manual (“Manual”) to the City of Carmel, Indiana (“City”) as a written acknowledgement of Owner’s warranty and agreement to institute, maintain, and follow the water quality Best Management Practices (“BMPs”) listed below, and to follow and abide by the inspection schedule and maintenance activities listed in this Manual. The Owner also hereby agrees to provide, at Owner’s cost, all additional maintenance, repair, and/or replacement services reasonably necessary to maintain the function and longevity of the BMPs from and including the date this Agreement is executed by Owner to and including the date on which a new Agreement is filed with the City by another party who assumes all of the obligations and responsibilities of Owner as set forth herein. BMPs: ___________________________________________________ ___________________________________________________ ___________________________________________________ _______________________________ ________________________ Owner Signature Date _______________________________ ______________________________ Printed Name Company STATE OF INDIANA ) ) SS: COUNTY OF HAMILTON ) BEFORE ME, the undersigned, a Notary Public in and for said County and State, personally appeared _________________________________ Owner subscribed and sworn before this ____ day of __________________, ________. ______________________________ ______________________________ County of Residence Signature ______________________________ Commission Expiration Date ______________________________ Printed Name Cascade Separator