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Home My WebLink AboutBMP_O&M Manual 10-28-19OPERATIONS AND MAINTENANCE MANUAL FOR POST CONSTRUCTION MEASURES BEAR CREEK SOUTH SECTIONS 1A & 1B CARMEL, INDIANA OWNER: Pulte Homes of Indiana, LLC 11590 N Meridian Street, Suite 530 Carmel, IN 46032 CIVIL ENGINEER: HWC ENGINEERING 135 N Pennsylvania Street, Suite 2800 Indianapolis, IN 46204 317-347-3663 office 317-347-3664 fax Property: Cross Reference Secondary Plat: #___________________________ Parcel ID: 17-09-19-00-00-049.002 October 28, 2019 BMP Owner Name: Pulte Homes of Indiana, LLC Address: 11590 N Meridian Street, Suite 530 Carmel, IN 46032 Business phone #: 317-575-2350 Emergency Contact #: 317-814-2028 E-mail address: Joseph.Marx@Pultegroup.com Periodic Inspections - Representatives of the City of Carmel Engineering Department have the right to enter this property to inspect the BMPs. The BMP Owner shall be financially responsible for any maintenance or repairs required by the City or its representatives during City’s inspections. - Refer to checklist and instructions provided with this Manual for guidance on BMP inspections. - Inspections must be documented on the inspection forms included in this Manual. - Inspections shall be in accordance with the SNOUT Inspection and Maintenance Manual. - Inspections shall be in accordance with the Stormwater Quality Unit (Aqua-Swirl) Inspection & Maintenance Manual. BMP Description The post-construction Best Management Practices (BMP) for this project are the proposed wet ponds with littoral native wetland planting shelves, five (5) SNOUT structures, and one (1) Stormwater Quality Unit (Aqua-Swirl). The SNOUT structures are located at storm structures #647, 656, 666, 671, and 679. The SNOUT structures allow the solids to settle out of the storm water and retain floatables prior to flowing downstream to the onsite wet ponds. The Stormwater Quality Unit (Str. #WQ1) structure is located at the end of the Atlas Court cul-de-sac just upstream from Lake #1. This unit will remove sediment, floatables, oils, etc. from the stormwater prior to it reaching the adjacent wet pond. The SNOUT structures and the Stormwater Quality Unit will serve as stormwater pretreatment measures for the downstream wet ponds. The Wet Pond littoral native wetland planting shelf include BMP signage that must be maintained and remain in place to educate about the BMP and provide important reminders such as “Do not mow or spray”. BMP Maintenance - BMP owners must routinely inspect BMPs to verify that all BMP components are functioning as designed and are not in danger of failing. All BMPs need maintenance to function as water quality and quantity enhancements. Maintenance includes pumping solids and floatables out of the structures. - BMP Owner is responsible for the maintenance of the BMP and any costs associated with maintaining the BMP. BMP Owner is required to perform any maintenance tasks specified by the annual City inspection. - BMP Owner shall keep the BMP free from litter. Refer to the inspection and maintenance guidelines for further clarification. - Solids that collect in the BMP shall be removed when it adversely affects the ability of the BMP to perform as a water quality control device. This will occur after 50% of the BMP storage volume is filled with solids. The solids that are removed from the BMP should be removed from the site to a suitable disposal / landfill facility. - If the BMP Structure is to be used as a sediment control measure during active construction, the performance sureties will not be released until sediment has been cleaned out of the BMP. - Construction debris cannot be disposed of within the BMP facility or used as fill in the embankment. - The BMPs can be accessed as follows: The SNOUT structures can be accessed from Andean Way and Spirit Circle. The stormwater ponds can be accessed from Andean Way and Atlas Court. The Aqua-Swirl structure can be accessed from Atlas Court. Annual Reporting Requirements The first report is due one year after construction is completed, with subsequent reports due each year within the same month of the initial report. If there are any deficiencies found during the inspection, these should be addressed. If the inspection report is not received within the month it is due, if there are deficiencies which were not included in the report, or if any deficiencies included in the report are not addressed in a timely manner, the BMP Owner faces enforcement action from the City. Submit Annual Reports to: Storm Water Program Engineering Department One Civic Square Carmel, IN 46032 The BMP Owner shall be responsible for all fees as outlined by the City of Carmel. 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 Wet Pond with Littoral Shelf Native BMP Plantings & BMP Signage (Safety Ledge) SNOUT Hood Inserts: Storm Sewer Inlet/Manholes - Str# 647, 656, 666, 671, 679 Aqua-Swirl AS-9 Stormwater Quality Unit - Str. #WQ1 Appendix A Primary Post Construction BMP Exhibits CARMEL, INDIANA OCTOBER 28, 2019 BEAR CREEK SOUTH SCALE: 1"= 200' BMP EXHIBIT #1 - OVERALL SITE LEGEND W. 141ST STREETLITTLE EAGLE CREEK AVENUE 6:1 RAMP TO NORMAL POOL LEVEL STORMWATER WET POND BMP LAKE OUTLET CONTROL BOXWET POND SHELFPLANTING ZONEEMERGENCY SPILLWAY BMP ACCESS OFF ATLAS COURT STORMWATER QUALITY UNIT #WQ1, AQUA-SWIRL AS-9 CARMEL, INDIANA OCTOBER 28, 2019 BEAR CREEK SOUTH SCALE: 1"= 70' BMP EXHIBIT #2LEGEND 6:1 RAMP TO NORMAL POOL LEVELWET POND SHELFPLANTING ZONEEMERGENCY SPILLWAY BMP ACCESS OFF ANDEAN WAY LAKE OUTLET CONTROL BOX STORMWATER WET POND BMP CARMEL, INDIANA OCTOBER 28, 2019 BEAR CREEK SOUTH SCALE: 1"= 70' BMP EXHIBIT #3-LAKE #2LEGEND STORMWATER WET POND BMP LAKE OUTLET CONTROL BOX EMERGENCY SPILLWAY 6:1 R A M P T O NOR M A L P O O L LEV E L WET POND SHELFPLANTING ZONEBMP A C C E S S O F F AND E A N W A Y CARMEL, INDIANA OCTOBER 28, 2019 BEAR CREEK SOUTH SCALE: 1"= 70' BMP EXHIBIT #4-LAKE #3LEGEND CARMEL, INDIANA OCTOBER 28, 2019 BEAR CREEK SOUTH BMP EXHIBIT #5 TYPICAL POND CROSS SECTION W/ PLANTINGS CARMEL, INDIANA OCTOBER 28, 2019 BEAR CREEK SOUTH BMP EXHIBIT #6 LAKE #1 - LAKE OUTLET CONTROL STRUCTURE (STR.#604) CARMEL, INDIANA OCTOBER 28, 2019 BEAR CREEK SOUTH BMP EXHIBIT #7 LAKE #2 - LAKE OUTLET CONTROL STRUCTURE (STR.#615) CARMEL, INDIANA OCTOBER 28, 2019 BEAR CREEK SOUTH BMP EXHIBIT #8 LAKE #3 - LAKE OUTLET CONTROL STRUCTURE (STR.#622) CARMEL, INDIANA OCTOBER 28, 2019 BEAR CREEK SOUTH BMP EXHIBIT #9 STORMWATER BMP NATIVE PLANTINGS DO NOT MOW OR SPRAY DO NOT MOW OR SPRAY SIGN NO SWIMMING POND SAFETY SIGN CARMEL, INDIANA OCTOBER 28, 2019 BEAR CREEK SOUTH BMP EXHIBIT #10 CARMEL, INDIANA OCTOBER 28, 2019 BEAR CREEK SOUTH BMP EXHIBIT #11 CARMEL, INDIANA OCTOBER 28, 2019 BEAR CREEK SOUTH BMP EXHIBIT #12 CARMEL, INDIANA OCTOBER 28, 2019 BEAR CREEK SOUTH BMP EXHIBIT #13 CARMEL, INDIANA OCTOBER 28, 2019 BEAR CREEK SOUTH BMP EXHIBIT #14 Appendix B BMP Maintenance and Inspection Requirements Post-Construction BMPs used in the Bear Creek South Subdivision: A) Wet Detention Ponds B) Snout Oil & Debris Stops C) BMP Signs for Wet Ponds with littoral native wetland planting shelf 1. Wet Pond Maintenance/Inspection Items ‐ All pond structures should be inspected for clogging and excessive debris and sediment accumulation at least four times per year, as well as after every storm greater than one inch. Structures that should be inspected include pond bottoms, trash racks, outlet structures, rip-rap, and inlet structures. ‐ Wet ponds should be drained prior to sediment removal. Sediment should be disposed of properly at an offsite location such as a landfill. Once sediment is removed, disturbed areas need to be immediately stabilized and re-vegetated. ‐ The pond drain (outlet control box structure) should be inspected and tested four times per year. ‐ The pond embankment should be inspected for evidence of tunneling or burrowing wildlife at least twice during the growing season. If damage is found, the damage should be repaired and the animals removed. ‐ Mowing, trimming, or spraying of the native grasses above the normal pool level (24” above normal pool) is not permitted. The pond embankment above the native grass level should be mowed on a regular basis. ‐ Inspections should assess the vegetation, erosion, flow channelization, bank stability, inlet/outlet conditions, embankment, and sediment/debris accumulation. ‐ Vegetated safety ledge areas should be inspected annually for unwanted growth of invasive species. ‐ Vegetative cover should be maintained at a minimum of 85 percent. ‐ Refer to checklists provided in Appendix C. ‐ Pond safety signs and BMP signs along littoral shelf native plantings should be reviewed during inspections (refer to locations per the exhibit in this manual). If a sign is found to have been damaged or is not legible for any reason, it will need to be replaced as soon as possible. 2. Snout Oil & Debris Stops ‐ Refer to checklist provided in Appendix C Appendix C Maintenance and Management Inspection Checklist Stormwater Technical Standards – Maintenance Inspection Checklists - Page 2 of 10 Detention BMP Inspection Checklist* Project Location:______________________________________________________________________________ Date/Time: __________________________________________________________________________________ Maintenance Item Satisfactory/ Unsatisfactory Recommended Inspection Frequency Comments Inlet/Outlet Pipes Structural integrity of inlet/outlet (Are any inlet pipes broken, crumbling, separated?) List Inlet Pipes Approximate Diameter and Type of Material Inlet Pipe 1___________________________ Inlet Pipe 2___________________________ Inlet Pipe 3___________________________ Outlet Pipe Size/Type___________________ A Riprap at inlet pipe (Is the riprap still present? Is it visible and not covered with sediment? A Stone around outlet pipe (Is the stone clogged with debris and/or sediment?) A Trash or debris blocking inlet/outlet (Inspect to ensure no major obstructions hindering general functionality) M Inspect/clean catch basin upstream of the BMP if accessible. A Inspect inlets and outlet for erosion (Are there eroded areas around the pipes?) A Inspect overflow spillway for signs of erosion. Pretreatment (if applicable) (Might include sediment forebay, upstream catch basin, bioswale, rain garden, swirl concentrator) Device functioning to trap/collect sediment Remove accumulated sediment as appropriate for the pretreatment device. forebay A Detention Pond A Inspection frequency key — A = Annual, M = Monthly, S = After major storm * It is recommended to review and inspect the basin with the engineering as-built plans. Stormwater Technical Standards – Maintenance Inspection Checklists - Page 3 of 10 Maintenance Item Satisfactory/ Unsatisfactory Recommended Inspection Frequency Comments Inspect side slopes, berms and emergency overflow for erosion A Reestablish permanent native vegetation on eroded slopes As Needed Inspect for excess sediment accumulation in pond if not pretreatment device is present A Overall functionality Ensure pond is functioning properly (Professional Civil Engineer is recommended) A Ensure the outlet is functioning properly (Professional Civil Engineer is recommended) A Optional/Enhancements Maintain 15-20 feet “no mow and chemical free” zone A Mow (or burn) the “no mow” zone A Inspect basin and “no mow” zone for invasive species. A Qualified professional applicator selectively herbicide invasive species A Increase plant diversity by planting additional vegetation in and around pond. A Complaints from residents (note on back) S Encroachment on pond/no- mow zone. A Unauthorized plantings A Aesthetics (e.g., graffiti, unkempt maintenance) A Inspection frequency key — A = Annual, M = Monthly, S = After major storm * It is recommended to review and inspect the basin with the engineering as-built plans. Summary Inspector’s remarks: _______________________________________________________________________________________________ _______________________________________________________________________________________________ Overall condition of facility (acceptable or unacceptable): ____________________________________________ Dates any maintenance must be completed by: _____________________________________________________ Stormwater Technical Standards – Recommended Plant List for BMPs - Page 1 of 22 RECOMMENDED PLANT LISTS FOR BEST MANAGEMENT PRACTICES This appendix contains recommended native and non- native (when appropriate) plant species for the Best Management Practices detailed throughout the manual. The recommended list contains species that are considered suitable to conditions in Central Indiana, which is located in Ecoregion 55. Species have been recommended based on hardiness, aesthetics, functionality, and commercial availability. It is certain that species exist outside the confines of this list that will perform in a comparable way to those listed; however, commercial availability is often a limiting factor in obtaining material for native plantings. Over time, and in certain locales, additional species will become available to supplement those listed below. An array of planting zones is provided based on normal water levels (Figure 1). Using these zones will provide the best chances for long-term success of native planting in the context of LID. While plants may naturally occur outside of the given ranges, these ranges are intended to be guidelines for plant installation. Whenever possible and practical in standing water conditions, native plants should be installed in live plant form (rather than seed). Seed or a combination of seed and live plants may be used in upland situations. Recommendations are given for height, bloom color, bloom time, sun requirements, and salt tolerance. Please note that these are recommendations based on a range of situations, and a specific plant or population may vary from site-to-site. For sun requirements, F = Full sun required, P = Partial sun tolerated, and S = Shade tolerated. Salt tolerance is classified as Yes (Y) or No (N). This was determined through literature reviews and anecdotal evidence. If there is no informa- tion confirming tolerance, a “No” was listed. . Source: USEPA Figure 1 Planting Zone/BMP Matrix Zone A — 2”-4” Below Water Level Zone B — 0”-2” Below Water Level Zone C — 0”-2” Above Water Level Zone D — 2”-4” Above Water Level Zone E — 4”-18” Above Water Level Zone F — 18”+ Above Water Level Zone G — Planter Boxes Zone H — Vegetated Roofs Rain gardens/Bioretention ܓ ܓܓܓܓܓ Vegetated Filter Strips ܓ ܓ ܓܓ Vegetated Swales ܓܓܓ Infiltration Basin ܓ ܓ Subsurface Infiltration Basins ܓܓܓ Infiltration Trenches ܓ ܓܓ Infiltration Berns ܓ ܓܓܓܓܓ Planter Boxes ܓ Vegetated Roofs ܓ Constructed Wetlands ܓ ܓ ܓ ܓ Wet Ponds ܓܓܓ Dry Extended Detention Basins ܓ ܓ ܓܓ Riparian Corridor Restoration ܓܓ Native Revegetation ܓ ܓ ܓ ܓ ܓܓܓ ܓ Stormwater Technical Standards – Recommended Plant List for BMPs - Page 2 of 22 Plant Installation Native Seeding Seasonal consideration: October 1-June 15 (note: seeds should not be planted on frozen ground). Native seeding is generally recommended for areas above the water line or 1-2” below the water line. Live plant material should be used to establish vegetation at deeper water levels. Broadcastseeding Broadcast seeding is preferred over drill seeding on graded, bare soil sites. Apply the seed uniformly over the surface using a combination seeder/cultipacker unit such as a Brillion or Truax Trillion seeder. The Trillion seeder is preferred as it is designed to handle native seeds. A cone seeder or other similar broadcasting equipment may also be used if the seed mix does not contain fluffy seeds in amounts sufficient to prevent free flowing without plugging. Seed should then be pressed into the surface using a cultipacker or roller. Drillseeding A rangeland-type no-till drill designed to plant native grasses and forbs may be used in bare soils although this equipment is specifically designed to plant through existing vegetation which is killed with an herbicide. Cultipacking or rolling before seeding may be required to prevent seed placement depths exceeding .25 inch, but cultipacking or rolling after seeding is not required. All seeding equipment, whether broadcast or drill, should be calibrated to deliver the seed at the rates and proportions specified in the plans. Equipment should be operated to ensure complete coverage of the entire area to be seeded, and seed must be placed no deeper than .25 inch in the soil. No fertilizers or soil conditioners will be required or allowed. NativePlanting Seasonal considerations: May 1-July 1 Plant plugs should be installed in holes drilled with an auger the same diameter and depth as the plug within +0.75 inch/- 0.25 inch. In wetland plantings where soil is soft and moist enough, a dibble bar or trowel may also be used. The planting layout should consider the requirements of the individual species regarding soil type, moisture, slope, shading, and other factors for the particular plant species. Planting densities vary according to budget and project goals and can range from three-to-five foot spacing for plug supplements of seeded areas to six inches to two foot spacing for high visibility landscaping projects with large budgets. Groups of five-to-seven plugs of the same species planted approximately one foot apart is usually preferable to planting all species intermixed randomly across the site at a uniform density. In wetland or shoreline areas with potential for high wave action or wildlife predation that may dislodge newly planted plugs, plugs should be secured with six inch or eight inch U-shaped wire erosion control blanket staples. Staple length is determined by the density of the planting substrate; softer substrates require longer length to hold plugs adequately. In areas where potential for wildlife predation exists, such as retention basins or other planting areas adjacent to open water, waterfowl barriers should be installed around a minimum of 50 percent of the plugs. All plugs not protected by barriers should be stapled into the substrate as described above. Barriers may consist of plastic or wire mesh enclosures supported with wooden stakes, adequately constructed to inhibit access by waterfowl for one growing season. Enclosures should extend at least two feet above the plant tops. Methodology should be approved by the project designer with input from a restoration ecologist if necessary. Barriers may be removed after one growing season. TreeandShrubPlanting See “Planting & Transplanting Landscape Trees & Shrubs” from the Purdue University Cooperative Extension Service – Department of Horticulture, Publication HO-100-W. Maintenance and Management Maintaining vegetated BMPs is typically most important during the first few years following installation. Supplemental irrigation may be needed to help establish plants in drought conditions. Plants may need to be replaced due to predation or other unseen Stormwater Technical Standards – Recommended Plant List for BMPs - Page 3 of 22 factors. Most commonly, management includes removing invasive species via mowing, hand-pulling, or spot herbicide applications. In larger areas, broadcast herbicide applications may be appropriate. Over time in upland areas, controlled burning may be used as a way to invigorate the plantings and control certain invasive species. If not feasible for social or cultural reasons, an annual or biennial mowing may be used instead of fire. Long-term management may be necessary, but is typically significantly less intensive. The site should be periodically checked for invasive species infestations. Any prairie or open area may need occasional (every three to five years) burning or mowing to remove woody vegetation that may encroach. Stormwater Technical Standards – Recommended Plant List for BMPs - Page 4 of 22 Planting Zone = two-to-four inches below water level These species require continual inundation within the given water depths in order to thrive. Although slight, short-term variances may be tolerated (+/-five inches for a period of 48 hours or less), water levels must remain in this range for a majority of the growing season for maximum plant growth and survival. Botanical Name Common Name Height Color Bloom Time Sun Salt Tolerant Woody Species: Cephalanthus occidentalis Buttonbush 15’ White Jun-Aug F/P/S N Grasses/Sedges/Rushes: Acorus calamus Sweet flag 1’-4’ Green May-Jun F/P N Scirpus acutus Hard-stemmed bulrush 4’-6’ Brown Apr-Aug F Y Scirpus validus Great bulrush 4’-8’ Brown May-Aug F Y Sparganium americanum American bur reed 2’-5’ Green Jun-Aug F/P N Sparganium eurycarpum Common bur reed 2’-6’ Green May-Aug F N Forbs: Asclepias incarnata Swamp milkweed 3’-5’ Pink Jun-Sep F/P N Decodon verticillatus Swamp loosestrife 2’-4’ Purple Jul-Sep F/P N Iris virginica Blue flag iris 2’-3’ Purple May-Jul F/P/S N Peltandra virginica Arrow arum 2’-5’ Green Jun-Jul F/P/S N Pontedaria cordata Pickerelweed 1’-3’ Violet Jun-Sep F/P N Sagittaria latifolia Arrowhead 1’-4’ White Jun-Sep F/P N Representative Zone A Species Buttonbush Arrowhead Blue Flag Iris Pickerel Weed Swamp Milkweed Source: JFNew Stormwater Technical Standards – Recommended Plant List for BMPs - Page 5 of 22 Planting Zone = zero-to-two inches below water level These species tolerate fluctuating water levels within this range. Although slight, short-term variances may be tolerated (+/-five inches for a period of 48 hours or less), water levels must remain in this range for most of the growing season for maximum plant growth and survival. Botanical Name Common Name Height Color Bloom Time Sun Salt Tolerant Woody Species: Cephalanthus occidentalis Buttonbush 15’ White Jun-Aug F/P/S N Grasses/Sedges/Rushes: Acorus calamus Sweet flag 1’-4’ Green May-Jun F/P N Carex comosa Bristly sedge 2’-3’ Green May-Jun F N Carex lacustris Lake sedge 2’-4’ Brown May-Jun F/P/S N Carex stricta Tussock sedge 2’-3’ Brown Apr-Jun F/P N Eleocharis acicularis Needle spike rush 6” Green May-Oct F N Eleocharis obtusa Blunt spike rush 1’-2’ Green May-Sep F/P N Glyceria striata Fowl manna grass 1’-5’ Green May-Jun F/P/S N Juncus effusus Soft rush 1’-4’ Brown July F/P N Scirpus acutus Hard-stemmed bulrush 4’-6’ Brown Apr-Aug F Y Scirpus cyperinus Wool grass 3’-5’ Tan Jun-Sep F Y Scirpus pendulus Red bulrush 2’-4’ Brown May-Jun F N Scirpus validus Great bulrush 4’-8’ Brown May-Aug F Y Sparganium americanum American bur reed 2’-5’ Green Jun-Aug F/P N Sparganium eurycarpum Common bur reed 2’-6’ Green May-Aug F N Forbs: Alisma plantago-aquatica Water plantain 2’-4’ White Jul-Sep F N Asclepias incarnata Swamp milkweed 3’-5’ Pink Jun-Sep F/P N Decodon verticillatus Swamp loosestrife 2’-4’ Purple Jul-Sep F/P N Iris virginica Blue flag iris 2’-3’ Purple May-Jul F/P/S N Peltandra virginica Arrow arum 2’-5’ Green Jun-Jul F/P/S N Pontedaria cordata Pickerelweed 1’-3’ Violet Jun-Sep F/P N Sagittaria latifolia Arrowhead 1’-4’ White Jun-Sep F/P N Saururus cernuus Lizard’s tail 2’-4’ White Jun-Aug P/S N Representative Zone B Species Blue Flag Iris Arrowhead Bristly Sedge Pickerel Weed Swamp Milkweed Source: JFNew SNOUT Stormwater Quality System Maintenance Considerations Background: The SNOUT Ò system from Best Management Products, Inc. (BMP, Inc.) 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 Ò hood is installed over the outlet pipe of a catch basin or other stormwater quality structure which incorporates a deep sump (see Figure 1). The SNOUT Ò forms a baffle in the structure which collects floatables 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 Ò by displacement from incoming flow. The resultant discharge contains considerably less unsightly trash and other gross pollutants, and can also offer modest reductions of free-oils and finer solids. As with any structural stormwater quality BMP (Best Management Practice), design and maintenance considerations will have a dramatic impact on SNOUT Ò system performance over the life of the facility. The most important factor to consider when designing structures which will incorporate a SNOUT Ò is the depth of the sump (the sump is defined as the depth from beneath the invert of the outlet pipe to the bottom of the structure) . 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. Maintenance Recommendations: · Monthly monitoring for the first year of a new installation after the site has been stabilized. · Measurements should be taken after each rain event of .5 inches or more, or monthly, as determined by local weather conditions. · Checking sedim ent depth and noting the surface pollutants in the structure will be helpful in planning maintenance. The pollutants collected in SNOUT Ò equipped structures will consist of floatable debris and oils on the surface of the captured water, and grit and sedim ent on the bottom of the structure. · It is best to schedule maintenance based on the solids collected in the sump. Optimally, the structure should be cleaned when the sump is half full (e.g. when 2 feet of material collects in a 4 foot sump, clean it out). · Structures should also be cleaned if a spill or other incident causes a larger than normal accumulation of pollutants in a structure. · Maintenance is best done with a vacuum truck. · If oil absorbent hydrophobic booms are being used in the structure to enhance hydrocarbon capture and removals, 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. · All collected wastes must be handled and disposed of according to local environmental requirements. · To maintain the SNOUT Ò hoods themselves, an annual inspection of the anti- siphon vent and access hatch are recommended. A simple flushing of the vent, or 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. Figure 1 SOLIDS SETTLE ON BOTTOM ANTI-SIPHON DEVICE OUTLET PIPE SNOUT OIL-DEBRIS HOOD MOUNTING FLANGE 1" PVC ANTI-SIPHON PIPE ADAPTER REMOVABLE WATERTIGHT ACCESS PORT, 6" OPENING OUTLET PIPE (HIDDEN) CONFIGURATION DETAIL TYPICAL INSTALLATION OIL AND DEBRIS FRONT VIEW SIDE VIEW SNOUT OIL-WATER-DEBRIS SEPARATOR *NOTE- SUMP DEPTH OF 36" MIN. FOR < OR= 12" DIAM. OUTLET. FOR OUTLETS >OR= 15", DEPTH = 2.5-3X DIAM. SEE NOTE* Further maintenance recommendations and site inspection field report sheets are available from BMP, Inc. Please contact us if we can offer further assistance. SNOUT is a registered trademark of Best Management Products, Inc. 53 Mt. Archer Rd. Lyme, CT 06371 Contacts: T. J. Mullen (800-504-8008) or Lee Duran (888-434-0277) Website: www.bmpinc.com The SNOUT is protected by US PATENT # 6126817 and CANADIAN PATENT# 2285146 Best Management Products, Inc. • 800.504.8008 • www.bmpinc.com THE SNOUT® STORMWATER QUALITY IMPROVEMENT SYSTEM SITE INSTALLATION INSPECTION REPORT INSPECTOR NAME: __________________________ COMPANY/AGENCY: __________________________ INSPECTION DATE: ___________ PROJECT NAME and REF#: __________________________ __________________________ SITE CONTACT: __________________________ PHONE: __________________________ EMAIL: __________________________ THE FOLLOWING ARE INSPECTION CRITERIA FOR EACH STRUCTURE. EACH STRUCTURE TO MEET INSTALLATION PARAMETERS OF ATTACHED SHEET (COPY PAGE 2 AS NEEDED FOR ADDITIONAL STRUCTURES): STRUCTURE#_____ BMP SNOUT MODEL______ INLET /OUTLET PIPE SIZE:___/___ IS ANTI-SIPHON VENT ASSEMBLY PRESENT AND FUNCTIONAL? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ IS ACCESS HATCH PRESENT AND PROPERLY SEATED? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ IS SNOUT BOLTED TO WALL UNIFORMLY AROUND PERIMETER? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ IS GASKET COMPRESSED AND VISIBLE BETWEEN SNOUT AND STRUCTURE WALL? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ IS SUMP DEPTH PER MANUFACTURER’S RECOMMENDATION? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ IF OIL BOOMS OR DEFLECTOR PLATES ARE SPECIFIED, ARE THEY PRESENT? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ INSTALLATION APPROVED? YES OR NO (CIRCLE ONE) IF NO, WHAT IS CORRECTION NEEDED AND DATE FOR COMPLETION (BELOW)? __________________________________________ TO BE COMPLETED BY ______________ Best Management Products, Inc. • 800.504.8008 • www.bmpinc.com STRUCTURE#_____ BMP SNOUT MODEL______ INLET /OUTLET PIPE SIZE:___/___ IS ANTI-SIPHON VENT ASSEMBLY PRESENT FUNCTIONAL? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ IS ACCESS HATCH PRESENT AND PROPERLY SEATED? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ IS GASKET VISIBLE BETWEEN SNOUT AND STRUCTURE WALL? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ IS SNOUT BOLTED TO WALL UNIFORMLY AROUND PERIMETER? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ IS SUMP DEPTH PER MANUFACTURER’S RECOMMENDATION? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ IF OIL BOOMS OR DEFLECTOR PLATES ARE SPECIFIED, ARE THEY PRESENT? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ INSTALLATION APPROVED? YES OR NO (CIRCLE ONE) IF NO, WHAT IS CORRECTION NEEDED AND DATE FOR COMPLETION (BELOW)? __________________________________________ TO BE COMPLETED BY ______________ STRUCTURE#_____ BMP SNOUT MODEL______ INLET /OUTLET PIPE SIZE:___/___ IS ANTI-SIPHON VENT ASSEMBLY PRESENT FUNCTIONAL? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ IS ACCESS HATCH PRESENT AND PROPERLY SEATED? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ IS GASKET VISIBLE BETWEEN SNOUT AND STRUCTURE WALL? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ IS SNOUT BOLTED TO WALL UNIFORMLY AROUND PERIMETER? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ IS SUMP DEPTH PER MANUFACTURER’S RECOMMENDATION? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ IF OIL BOOMS OR DEFLECTOR PLATES ARE SPECIFIED, ARE THEY PRESENT? YES OR NO (CIRCLE ONE) IF NO, WHY?_______________________________ INSTALLATION APPROVED? YES OR NO (CIRCLE ONE) IF NO, WHAT IS CORRECTION NEEDED AND DATE FOR COMPLETION (BELOW)? __________________________________________ TO BE COMPLETED BY ______________ SNOUT INSTALLATION SEQUENCE Empty Structure is Prepared SNOUT is Trial Fitted over Pipe The SNOUT Trapping Floatable Oil and Debris Structure is Ready for Service usually within 1 Hour SNOUT is Bolted to Wall with Gasket on SNOUT Flange Holes Drilled for Anchor Shields THE SNOUT EASY TO INSTALL EASY TO AFFORD Best Management Products, Inc. ♦ 800 504 8008 ♦ www.bmpinc.com Site Name: Bear Creek South Subdivision Change in ownership since last inspection? Y N Owner Name: Owner Address: Owner Phone Number: Emergency Phone Number: Location: Date: Time: Inspector Name: Floatable Debris and Oil 1. Remove manhole lid to expose liquid surface of Aqua-SwirlTM. 2. Remove floatable debris with basket or net if any is present. 3. If a hydrocarbon spill has occurred, (e.g. more than a sheen of oil or gas is present) the system should be cleaned immediately (see "Cleaning" Figure 3). Note: Water in an Aqua-SwirlTM can appear black like oil due to the dark body of the surrounding structure. Oil appears darker than water in the system and is usually accompanied by debris (e.g. Styrofoam, etc.) with obvious signs of oil stains. The depth of oil can be measured with an oil/water interface probe, a stadia rod with water phylic paste, a coliwasa, or by simply collecting a representative sample with a jar attached to a rod. 4. If hydrocarbon absorbant floc or pads are used, these should be inspected to determine whether they are loaded with hydrocarbons. This will be indicated by a dark colaration of the pad or floc. Pads and/or floc should be removed and disposed of in accordance with City of Carmel and any applicable state and/or federal laws if they contain hydrocarbons. Sediment Accumulation Lower a dipstick tube equipped with a ball valve (e.g. Sludge Judge or similar device) into Aqua-SwirlTM through the service access provided. Measure the depth of the sludge. At a maximum, the sludge should not exceed 36" depth before maintenance. See Figures 1 and 2. 36" Figure 1 Figure 2 City of Carmel, IN Site and Owner Information Aqua-Swirl TM Inspection Maintenance Items Operation, Maintenance, and Inspection Manual for BMP Owners (Applicable affidavits for BMP fees stipulated by the Town should be attached to this document) Aqua-SwirlTM O and M Manual Page 1 Diversion Structures If an external diversion structure is present on the site, this should be inspected for the following items. 1. Inspect weir or other structure for structural decay or damage. Weirs are more susceptible to damage than off-set piping and should be checked to confirm that they are not crumbling or decaying. 2. Inspect diversion structure and by-pass piping for signs of structural damage or blockage from debris or sediment accumulation. 3. Measure elevations on diversion weir or piping to ensure it is consistent with site plan design. 4. Inspect downstream structure in diversion system for signs of blockage or structural failure. Remove sediments, oils and other floatable pollutants with a vactor. Dispose of all waste in accordance with City of Indianapolis and any applicable state, and/or federal requirements. Oil should be pumped and removed with any liquids and sediments that have been trapped in the system. These liquids should be taken to an industrial waste water treatment facility for treatment. Liquids and solids pumped from the AquaSwirlTM should not be dumped back into the stormwater system or into a sanitary sewer. Figure 3 Note: The AquaSwirlTM is designed so that entry to the system is not necessary for inspection or maintenance. If, however, you wish to enter the system, this is an OSHA confined space entry and OSHA confined space entry procedures should be followed to enter the system. During Construction Inspect the AquaSwirlTM every three months (minimum) and clean the system as needed. The AquaSwirlTM should be inspected and cleaned at the end of construction regardless of whether it has reached its sediment or oil storage capacity. First Year Post-Construction Inspect the AquaSwirlTM every six months and clean the system as needed. Inspect and clean the system at least once bi-annually regardless of whether it has reached its sediment or floatable pollutant storage capa Second and Subsequent Years Post-Construction If the AquaSwirlTM did not reach full sediment or floatable pollutant capacity in the First Year Post-Constructio the system can be inspected once annually and cleaned as need or bi-annually at a minimu If the AquaSwirlTM reached full sediment or floatable pollutant capacity in less than 12 months in the First Year Post-Construction, the system should be inspected once every six months and cleaned as needed. The AquaSwirlTM should be cleaned at least bi-annually regardless of whether it reaches its sediment or floatable pollutant capac Bypass Structures Bypass structures should be inspected whenever the AquaSwirlTM is inspected and maintained as needed. Cleaning Inspection (continued) Maintenance Schedule Aqua-SwirlTM O and M Manual Page 2 Company Name: Street Address: City, State, Zip: Contact: Office Phone: Mobile Phone: Pager: Date of cleaning: (Next inspection should be 3 months from this date for the first year). Time of cleaning: Date of next inspection: Floatable debris present (Y/N)? Oil present (Y/N)? Oil depth (inches): Any structural damage? Y N Where? Any evidence of structural wear? Y N Where? Odors present? Y N Describe: Any plugging? Y N Describe: Activity Log Structural Conditions and Comments Maintenance Company Information Aqua-SwirlTM O and M Manual Page 3 Additional Comments and/or Actions to Be Taken Time Frame NOTES: 1. Attach site plan showing Aqua-SwirlTM location. 2. Attach detail drawing showing Aqua-SwirlTM dimensions and model number. 3. If a diversion structure is used, attached details showing basic design and elevations. NOTES Aqua-SwirlTM O and M Manual Page 4 Date Construction Started: Date Construction Ended: Activity 123456789101112 Inspect and Clean as Needed XXXX Inspect Bypass Structures XXXX (if applicable) and Maintain As Needed Clean System*X* * The AquaSwirlTM should be cleaned once a year regardless of whether it has reached full pollutant storage capacity during the construction phase of the project. Activity 123456789101112 Inspect and Clean as Needed XX Inspect Bypass Structures XX (if applicable) and Maintain As Needed Clean System*X* * The AquaSwirlTM should be cleaned at the end of the first year post construction if it is at or near its pollutant storage capcacity. Otherwise, the system can be cleaned at a later date depending on how quickly the sediment starts to harden. Activity 123456789101112 Inspect and Clean as Needed*XX Inspect Bypass Structures*XX (if applicable) and Maintain As Needed Clean System* *If the AquaSwirlTM did not reach full sediment or floatable pollutant capacity in the First Year Post-Construction, the system can be inspected once annually. If the AquaSwirlTM reached full sediment or floatable pollutant capacity in less than 12 months in the First Year Post-Construction, the system should be inspected as frequently as past history warrants and cleaned as needed. Regardless of whether the AquaSwirlTM reaches full sediment or floatable storage capacity, it should be cleaned frequently enough to prevent captured sediments from hardening. Normally, cleaning once every two to three years should be sufficient to prevent sediments from hardening. *The bypass system should be inspected with each AquaSwirlTM inspection and maintained as needed. Aqua-Swirl TM TABULAR MAINTENANCE SCHEDULE Second and Subsequent Years Post-Construction Month During Construction Month First Year Post-Construction Month Aqua-SwirlTM O and M Manual Page 5