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Home My WebLink AboutO&M Manual 1215 Rangeline Road Carmel, IN Operations & Maintenance Manual June 15, 2022 A. A Water Quality BMP is a “Best Management Practice” for handling stormwater as it leaves a developed site and enters the surrounding waterways. The objective of Water Quality BMPs is to minimize contaminants that are present on developed land, such as sediment, debris, oils, and other pollutants, from being collected during rain events and entering local streams and rivers. B. Owner Contact: Novo Development Group Timothy Hill 20 W Carmel Dr, Suite 101 Carmel, IN 46032 (317) 343-9757 C. The owner shall be responsible for all maintenance and costs associated with the BMPs for this development. D. The City of Carmel has Right-of-Entry to the development to inspect and maintain the BMP as necessary. Easements have been provided around the BMPs for this development. Figures showing these easements are included in this manual. E. BMPs for this development: 1. Underground Detention with Isolator Row and Diversion Structure (Proposed Detention System) – The stormwater that outlets from the proposed drainage system flows into an underground detention system. The water will infiltrate through the ground and store water during storms. During large storms, the water will outfall through a proposed outlet control structure then to a 24-inch pipe into existing storm sewer. There is one underground detention system for this site. Refer to sheet C305 for their locations, including the inspection ports and isolation chamber layout. 2. Aquaswirl AS-4 – The stormwater collected via inlets and from the roof drains will be routed through an offline AS-4 before entering the underground detention. Please see sheet C305 for location. F. Specific maintenance guidelines are provided within this manual. Novo Development Group, or its delegated subcontractor will perform required BMP maintenance so long as Novo Development Group or its affiliates retains ownership of the subject property. G. See enclosed drawings for BMP locations, access easement, points of stormwater discharge from the site, and BMP details. H. Requirements regarding the submittal of annual inspection reports 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 included in the report are not addressed in a timely manner, the BMP owner faces enforcement action from the City. 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 Stormtech Isolator Row Off-line Aquaswirl AS-4 VANC302 EROSION CONTROL PLAN - PHASE 2CKD.DR.DES.DATEPROJECT No:REVISIONDATENo.PROSCENIUM PHASE II (1215)1215 SOUTH RANGELINE ROADCARMEL, INDIANA333 North Alabama StreetSuite 200Indianapolis, IN 46204317.299.7500FAX: 317.291.5805R Know what'sbelow.Callbefore you dig. R R GENERAL NOTES CONSTRUCTION SEQUENCE LEGEND SOILS MAP C305 UTILITY PLANCKD.DR.DES.DATEPROJECT No:REVISIONDATENo.PROSCENIUM PHASE II (1215)1215 SOUTH RANGELINE ROADCARMEL, INDIANA333 North Alabama StreetSuite 200Indianapolis, IN 46204317.299.7500FAX: 317.291.5805LEGENDLEGEND UTILITY NOTES R Know what'sbelow.Callbefore you dig. R R KEY NOTES 1. Check each inlet casting for accumulated debris. Remove by hand and dispose of properly. 2. Remove the castings from the storm sewer structures. 3. Visually inspect the interior of each structure for structure damage, standing water, and accumulated debris and sediment. 4. Visually inspect for evidence of these problems in the connecting pipes as well. 1. Remove any large debris or trash by hand 2. Remove debris and sediment from the storm sewer structures with a vactor. Dispose of all waste in accordance with City of Nobelsville and any applicable state, and/or federal requirements. 3. Use clean pressurized water to flush debris and sediment from the storm pipes to the next downstream structure for removal as noted in step 2. Figure 3 1 - Inlet castings should be inspected montly and after each rainfall event. More frequent inspections should be performed in areas where higher potential for trash or litter exist (eg. Retail establishments) and during the fall when leaves are present on the ground. 2 - Inlets/Catch Basins should also be inspected annually at a minimum for sediment depth. The maximum sediment depth should be no greater than 1/4 of the pipe diameter with a maximum of 6". 3 - Storm Sewer should also be inspected annually at a minimum for sediment depth. The maximum sediment depth should be no greater than 1/4 of the pipe diameter with a maximum of 6". Maintenance Items Inspection Cleaning Maintenance Schedule Storm Sewer Structures and Pipes Operation, Maintenance, and Inspection Manual for BMP Owners Page 1 Company Name: Street Address: City, State, Zip: Contact: Office Phone: Mobile Phone: Pager: Date of cleaning: Time of cleaning: Date of next inspection: Any structural damage?Y N Where? Any evidence of structural wear?Y N Where? Any debris or sediment present?Y N Describe: Any plugging?Y N Describe: Activity Log Structural Conditions and Comments Maintenance Company Information Page 2 Additional Comments and/or Actions to Be Taken Time Frame NOTES Page 3 THE MOST ADVANCED NAME IN WATER MANAGEMENT SOLUTIONS™ Isolator ® Row O&M Manual An company SC-740 MC-7500 MC-3500 2 THE MOST ADVANCED NAME IN WATER MANAGEMENT SOLUTIONS TM Looking down the Isolator Row from the manhole opening, woven geotextile is shown between the chamber and stone base. StormTech Isolator Row with Overflow Spillway (not to scale) The IsolaT or ® r ow InTROducTIOn An important component of any Stormwater Pollution Prevention Plan is inspection and maintenance. The StormTech Isolator Row is a patented technique to inexpensively enhance Total Suspended Solids (TSS) removal and provide easy access for inspection and maintenance. The ISOlaTOR ROw The Isolator Row is a row of StormTech chambers, either SC-160LP, SC-310, SC-310-3, SC-740, DC-780, MC-3500 or MC-4500 models, that is surrounded with filter fabric and connected to a closely located manhole for easy access. The fabric-wrapped chambers provide for settling and filtration of sediment as storm water rises in the Isolator Row and ultimately passes through the filter fabric. The open bottom chambers and perforated sidewalls (SC-310, SC- 310-3 and SC-740 models) allow storm water to flow both vertically and horizontally out of the chambers. Sediments are captured in the Isolator Row protecting the storage areas of the adjacent stone and chambers from sediment accumulation. Two different fabrics are used for the Isolator Row. A woven geotextile fabric is placed between the stone and the Isolator Row chambers. The tough geotextile provides a media for storm water filtration and provides a durable surface for maintenance operations. It is also designed to prevent scour of the underlying stone and remain intact during high pressure jetting. A non-woven fabric is placed over the chambers to provide a filter media for flows passing through the perforations in the sidewall of the chamber. The non-woven fabric is not required over the DC-780, MC-3500 or MC-4500 models as these chambers do not have perforated side walls. The Isolator Row is typically designed to capture the “first flush” and offers the versatility to be sized on a volume basis or flow rate basis. An upstream manhole not only provides access to the Isolator Row but typically includes a high flow weir such that storm water flowrates or volumes that exceed the capacity of the Isolator Row overtop the over flow weir and discharge through a manifold to the other chambers. The Isolator Row may also be part of a treatment train. By treating storm water prior to entry into the chamber system, the service life can be extended and pollutants such as hydrocarbons can be captured. Pre-treatment best management practices can be as simple as deep sump catch basins, oil-water separators or can be innovative storm water treatment devices. The design of the treatment train and selection of pretreatment devices by the design engineer is often driven by regulatory requirements. Whether pretreatment is used or not, the Isolator Row is recommended by StormTech as an effective means to minimize maintenance requirements and maintenance costs. Note: See the StormTech Design Manual for detailed information on designing inlets for a StormTech system, including the Isolator Row. ECCENTRIC HEADER MANHOLE WITH OVERFLOW WEIR STORMTECH ISOLATOR ROW OPTIONAL PRE-TREATMENT OPTIONAL ACCESS STORMTECH CHAMBERS InSpecTIOn The frequency of inspection and maintenance varies by location. A routine inspection schedule needs to be established for each individual location based upon site specific variables. The type of land use (i.e. industrial, commercial, residential), anticipated pollutant load, percent imperviousness, climate, etc. all play a critical role in determining the actual frequency of inspection and maintenance practices. At a minimum, StormTech recommends annual inspections. Initially, the Isolator Row should be inspected every 6 months for the first year of operation. For subsequent years, the inspection should be adjusted based upon previous observation of sediment deposition. The Isolator Row incorporates a combination of standard manhole(s) and strategically located inspection ports (as needed). The inspection ports allow for easy access to the system from the surface, eliminating the need to perform a confined space entry for inspection purposes. If upon visual inspection it is found that sediment has accumulated, a stadia rod should be inserted to determine the depth of sediment. When the average depth of sediment exceeds 3 inches throughout the length of the Isolator Row, clean-out should be performed. MaInTenance The Isolator Row was designed to reduce the cost of periodic maintenance. By “isolating” sediments to just one row, costs are dramatically reduced by eliminating the need to clean out each row of the entire storage bed. If inspection indicates the potential need for maintenance, access is provided via a manhole(s) located on the end(s) of the row for cleanout. If entry into the manhole is required, please follow local and OSHA rules for a confined space entries. Maintenance is accomplished with the JetVac process. The JetVac process utilizes a high pressure water nozzle to propel itself down the Isolator Row while scouring and suspending sediments. As the nozzle is retrieved, the captured pollutants are flushed back into the manhole for vacuuming. Most sewer and pipe maintenance companies have vacuum/JetVac combination vehicles. Selection of an appropriate JetVac nozzle will improve maintenance efficiency. Fixed nozzles designed for culverts or large diameter pipe cleaning are preferable. Rear facing jets with an effective spread of at least 45” are best. Most JetVac reels have 400 feet of hose allowing maintenance of an Isolator Row up to 50 chambers long. The JetVac process shall only be performed on StormTech Isolator Rows that have aaShTO class 1 woven geotextile (as specified by StormTech) over their angular base stone. StormTech Isolator Row (not to scale) IsolaT or r ow InspecTIon/MaInTenance Note: Non-woven fabric is only required over the inlet pipe connection into the end cap for DC-780, MC-3500 and MC-4500 chamber models and is not required over the entire Isolator Row. IsolaTor row sTep By sTep MaInTenance procedures STep 1 Inspect Isolator Row for sediment. A) Inspection ports (if present) i. Remove lid from floor box frame ii. Remove cap from inspection riser iii. Using a flashlight and stadia rod,measure depth of sediment and record results on maintenance log. iv. If sediment is at or above 3 inch depth, proceed to Step 2. If not, proceed to Step 3. B) All Isolator Rows i. Remove cover from manhole at upstream end of Isolator Row ii. Using a flashlight, inspect down Isolator Row through outlet pipe 1. Mirrors on poles or cameras may be used to avoid a confined space entry 2. Follow OSHA regulations for confined space entry if entering manhole iii. If sediment is at or above the lower row of sidewall holes (approximately 3 inches), proceed to Step 2. If not, proceed to Step 3. STep 2 Clean out Isolator Row using the JetVac process. A) A fixed floor cleaning nozzle with rear facing nozzle spread of 45 inches or more is preferable B) Apply multiple passes of JetVac until backflush water is clean C) Vacuum manhole sump as required STep 3 Replace all caps, lids and covers, record observations and actions. STep 4 Inspect & clean catch basins and manholes upstream of the StormTech system. ADS “Terms and Conditions of Sale” are available on the ADS website, www.ads-pipe.com The ADS logo and the Green Stripe are registered trademarks of Advanced Drainage Systems, Inc. Stormtech® and the Isolator® Row are registered trademarks of StormTech, Inc. © 2017 Advanced Drainage Systems, Inc. #11011 01/17 CS Advanced Drainage Systems, Inc. 4640 Trueman Blvd., Hilliard, OH 43026 1-800-821-6710 www.ads-pipe.com )( SaMple MaInTenance lOg Date Stadia Rod Readings Sediment Depth (1)–(2)Observations/Actions InspectorFixed point to chamber bottom (1) Fixed point to top of sediment (2) 3/15/11 6.3 ft none New installation. Fixed point is CI frame at grade djm 9/24/11 6.2 0.1 ft Some grit felt Sm 6/20/13 5.8 0.5 ft mucky feel, debris visible in manhole and in Isolator Row, maintenance due Nv 7/7/13 6.3 ft 0 System jetted and vacuumed djm StormTech Construction Guide REQUIRED MATERIALS AND EQUIPMENT LIST p"DDFQUBCMFÙMMNBUFSJBMTQFS5BCMF p8PWFOBOEOPOXPWFOHFPUFYUJMFT p4UPSN5FDITPMJEFOEDBQTBOEQSFDPSFEFOEDBQT p4UPSN5FDIDIBNCFST p4UPSN5FDINBOJGPMETBOEÙUUJOHT IMPORTANT NOTES: A. This installation guide provides the minimum requirements for proper installation of chambers. Non-adherence to this guide may result in damage to chambers during installation. Replacement of damaged chambers during or after backfilling is costly and very time consuming. It is recommended that all installers are familiar with this guide, and that the contractor inspects the chambers for distortion, damage and joint integrity as work progresses. B. Use of a dozer to push embedment stone between the rows of chambers may cause damage to chambers and is not an acceptable backfill method. Any chambers damaged by using the “dump and push” method are not covered under the StormTech standard warranty. C. Care should be taken in the handling of chambers and end caps. Avoid dropping, prying or excessive force on chambers during removal from pallet and initial placement. Requirements for System Installation ([FDYDWHEHGDQGSUHSDUHVXEJUDGHSHU engineer’s plans. 3ODFHQRQZRYHQJHRWH[WLOHRYHUSUHSDUHGVRLOV DQGXSH[FDYDWLRQZDOOV,QVWDOOXQGHUGUDLQVLI UHTXLUHG 3ODFHFOHDQFUXVKHGDQJXODUVWRQHIRXQGDWLRQ rPPPLQ&RPSDFWWRDFKLHYHDÜDW VXUIDFHSC-310/SC-740/DC-7801 An company Manifold, Scour Fabric and Chamber Assembly ,QVWDOOPDQLIROGVDQGOD\RXWZRYHQVFRXU geotextile at inlet rows [min. 12.5 ft (3.8 m)] at HDFKLQOHWHQGFDS3ODFHDFRQWLQXRXVSLHFH QRVHDPVGRXEOHOD\HUDORQJHQWLUHOHQJWKRI Isolator® Row(s). $OLJQWKHÛUVWFKDPEHUDQGHQGFDSRIHDFK row with inlet pipes. Contractor may choose to SRVWSRQHVWRQHSODFHPHQWDURXQGHQGFKDPEHUV and leave ends of rows open for easy inspection RIFKDPEHUVGXULQJWKHEDFNÛOOSURFHVV &RQWLQXHLQVWDOOLQJFKDPEHUVE\RYHUODSSLQJFKDPEHU HQGFRUUXJDWLRQV&KDPEHUMRLQWVDUHODEHOHGq/RZHU -RLQWt2YHUODS+HUHrDQGq%XLOGWKLVGLUHFWLRQt 8SSHU-RLQWr%HVXUHWKDWWKHFKDPEHUSODFHPHQW GRHVQRWH[FHHGWKHUHDFKRIWKHFRQVWUXFWLRQ HTXLSPHQWXVHGWRSODFHWKHVWRQH0DLQWDLQ PLQLPXPrPPVSDFLQJEHWZHHQURZV Attaching the End Caps Prefabricated End Caps Isolator Row Lift the end of the chamber a few inches off WKHJURXQG:LWKWKHFXUYHGIDFHRIWKHHQG FDSIDFLQJRXWZDUGSODFHWKHHQGFDSLQWRWKH FKDPEHUpVHQGFRUUXJDWLRQ rPPLQOHWVDUHWKHPD[LPXPVL]HWKDW FDQÛWLQWRD6&'&HQGFDSDQGPXVW EHSUHIDEULFDWHGZLWKDrPPSLSHVWXE 6&FKDPEHUVZLWKDrPPLQOHWSLSH PXVWXVHDSUHIDEULFDWHGHQGFDSZLWKDr PPSLSHVWXE 3ODFHWZRFRQWLQXRXVOD\HUVRI$'6:RYHQIDEULF EHWZHHQWKHIRXQGDWLRQVWRQHDQGWKHLVRODWRUURZ FKDPEHUVPDNLQJVXUHWKHIDEULFOD\VÜDWDQGH[WHQGV WKHHQWLUHZLGWKRIWKHFKDPEHUIHHW'UDSHDVWULSRI $'6QRQZRYHQJHRWH[WLOHRYHUWKHURZRIFKDPEHUV QRWUHTXLUHGRYHU'&7KLVLVWKHVDPHW\SH RIQRQZRYHQJHRWH[WLOHXVHGDVDVHSDUDWLRQOD\HU DURXQGWKHDQJXODUVWRQHRIWKH6WRUP7HFKV\VWHP2 Initial Anchoring of Chambers – Embedment Stone Backfill of Chambers – Embedment Stone UNEVEN BACKFILL Initial embedment shall be spotted along the centerline of the chamber evenly anchoring the lower portion of the chamber. This is best accomplished with a stone conveyor or excavator reaching along the row. %DFNÛOOFKDPEHUVHYHQO\6WRQHFROXPQKHLJKWVKRXOGQHYHUGLIIHUE\PRUH than 12” (300 mm) between adjacent chamber rows or between chamber rows and perimeter. EVEN BACKFILL 1RHTXLSPHQWVKDOOEHRSHUDWHGRQWKHEHGDWWKLVVWDJHRIWKHLQVWDOODWLRQ ([FDYDWRUVPXVWEHORFDWHGRIIWKHEHG'XPSWUXFNVVKDOOQRWGXPSVWRQH GLUHFWO\RQWRWKHEHG'R]HUVRUORDGHUVDUHQRWDOORZHGRQWKHEHGDWWKLV time. 3HULPHWHUVWRQHPXVWEHEURXJKWXSHYHQO\ZLWKFKDPEHUURZV3HULPHWHU PXVWEHIXOO\EDFNÛOOHGZLWKVWRQHH[WHQGHGKRUL]RQWDOO\WRWKHH[FDYDWLRQ wall. 3(5,0(7(5127%$&.),//('3(5,0(7(5)8//<%$&.),//(' &DOO6WRUP7HFKDW888.892.2694IRUWHFKQLFDODQGSURGXFWLQIRUPDWLRQRUYLVLWZZZVWRUPWHFKFRP 3 12" (300 mm) MAX. Backfill - Embedment Stone & Cover Stone Final Backfill of Chambers – Fill Material StormTech Isolator Row Detail &RQWLQXHHYHQO\EDFNÛOOLQJEHWZHHQURZV DQGDURXQGSHULPHWHUXQWLOHPEHGPHQW stone reaches tops of chambers. 3HULPHWHUVWRQHPXVWH[WHQGKRUL]RQWDOO\ to the excavation wall for both straight or sloped sidewalls. Only after chambers HAVEBEENBACKÚLLEDTOTOPOF CHAMBERANDWITHAMINIMUMs MM OFCOVERSTONEONTOPOF CHAMBERSCANSMALLDOZERSBEUSED OVERTHECHAMBERSFORBACKÚLLING REMAININGCOVERSTONE ,QVWDOOQRQZRYHQJHRWH[WLOHRYHUVWRQH*HRWH[WLOHPXVWRYHUODSrPP PLQZKHUHHGJHVPHHW&RPSDFWHDFKOLIWRIEDFNÛOODVVSHFLÛHGLQWKHVLWH design engineer’s drawings. Roller travel parallel with rows. 6PDOOGR]HUVDQGVNLGORDGHUVPD\EH XVHGWRÛQLVKJUDGLQJVWRQHEDFNÛOOLQ DFFRUGDQFHZLWKJURXQGSUHVVXUHOLPLWVLQ 7DEOH7KH\PXVWSXVKPDWHULDOSDUDOOHO WRURZVRQO\1HYHUSXVKSHUSHQGLFXODU WRURZV6WRUP7HFKUHFRPPHQGVWKDW the contractor inspect chambers before SODFLQJÛQDOEDFNÛOO$Q\FKDPEHUV GDPDJHGE\FRQVWUXFWLRQVKDOOEH removed and replaced. 4 Inserta Tee Detail NOTES: 1.INSPECTION PORTS MAY BE CONNECTED THROUGH ANY CHAMBER CORRUGATION VALLEY. 2.ALL SCHEDULE 40 FITTINGS TO BE SOLVENT CEMENTED (4" PVC NOT PROVIDED BY ADS). CONNECTION DETAIL NTS 8" (200 mm) 4" (100 mm) SCHED 40 PVC COUPLING 4" (100 mm) SCHED 40 PVC 4" (100 mm) SCHED 40 PVC CORE 4.5" (114 mm) Ø HOLE IN CHAMBER (4.5" HOLE SAW REQ'D) ANY VALLEY LOCATION STORMTECH CHAMBER CONCRETE COLLAR PAVEMENT 12" (300 mm) MIN WIDTH CONCRETE SLAB 6" (150 mm) MIN THICKNESS 4" PVC INSPECTION PORT DETAIL NTS 8" NYLOPLAST INSPECTION PORT BODY (PART# 2708AG4IPKIT) OR TRAFFIC RATED BOX W/SOLID LOCKING COVER CONCRETE COLLAR NOT REQUIRED FOR UNPAVED APPLICATIONS 4" (100 mm) SCHED 40 PVC Material Location Description AASHTO M43 Designation1 Compaction/Density Requirement D Final Fill: Fill Material for layer ‘D’ starts from the top of the ‘C’ layer to the bottom of flexible pavement or unpaved finished grade above. Note that the pave- ment subbase may be part of the ‘D’ layer. Any soil/rock materials, native soils or per engineer’s plans. Check plans for pavement subgrade requirements. N/A Prepare per site design engineer’s plans. Paved installations may have stringent material and prepara- tion requirements. C Initial Fill: Fill Material for layer ‘C’ starts from the top of the embedment stone (‘B’ layer) to 18” (450 mm) above the top of the chamber. Note that pave- ment subbase may be part of the ‘C’ layer. Granular well-graded soil/ aggregate mixtures, <35% fines or processed aggregate. Most pavement subbase materials can be used in lieu of this layer. AASHTO M45 A-1, A-2-4, A-3 or AASHTO M431 3, 357, 4, 467, 5, 56, 57, 6, 67, 68, 7, 78, 8, 89, 9, 10 Begin compaction after min. 12” (300 mm) of mate- rial over the chambers is reached. Compact additional layers in 6” (150 mm) max. lifts to a min. 95% Proctor density for well-graded material and 95% relative density for processed aggregate materials. Roller gross vehicle weight not to exceed 12,000 lbs (53 kN). Dynamic force not to exceed 20,000 lbs (89 kN) B Embedment Stone: Embedment Stone surrounding chambers from the foundation stone to the ‘C’ layer above. Clean, crushed, angular stone AASHTO M431 3, 357, 4, 467, 5, 56, 57 No compaction required. A Foundation Stone: Foundation Stone below the chambers from the subgrade up to the foot (bottom) of the chamber. Clean, crushed, angular stone,AASHTO M431 3, 357, 4, 467, 5, 56, 57 Place and compact in 6” (150 mm) lifts using two full coverages with a vibratory compactor.2, 3 Table 1- Acceptable Fill Materials Figure 1- Inspection Port Detail PLEASE NOTE: 1. The listed AASHTO designations are for gradations only. The stone must also be clean, crushed, angular. For H[DPSOHDVSHFLçFDWLRQIRUVWRQHZRXOGVWDWHqFOHDQFUXVKHGDQJXODUQR$$6+720VWRQHr 2. StormTech compaction requirements are met for ‘A’ location materials when placed and compacted in 6” (150 mm) (max) lifts using two full coverages with a vibratory compactor. 3. :KHUHLQçOWUDWLRQVXUIDFHVPD\EHFRPSULVHGE\FRPSDFWLRQIRUVWDQGDUGLQVWDOODWLRQVDQGVWDQGDUGGHVLJQORDG FRQGLWLRQVDèDWVXUIDFHPD\EHDFKLHYHGE\UDNLQJRUGUDJJLQJZLWKRXWFRPSDFWLRQHTXLSPHQW)RUVSHFLDOORDG designs, contact StormTech for compaction requirements. Figure 2 - Fill Material Locations 5 ADS “Terms and Conditions of Sale” are available on the ADS website, www.ads-pipe.com. Advanced Drainage Systems, the ADS logo, and the green stripe are registered trademarks of Advanced Drainage Systems, Inc. StormTech® and the Isolator® Row are registered trademarks of StormTech, Inc #11010 07/19 CS ©2019 Advanced Drainage Systems, Inc. NOTES: 1. 36” (900 mm) of stabilized cover materials over the chambers is required for full dump truck travel and dumping. 2. During paving operations, dump truck axle loads on 18” (450 mm) of cover may be necessary. Precautions should be taken to avoid rutting of the road base layer, to ensure that compaction requirements have been met, and that a minimum of 18” (450 mm) of cover exists over the chambers. Contact StormTech for additional guidance on allowable axle loads during paving. 3. Ground pressure for track dozers is the vehicle operating weight divided by total ground contact area for both tracks. Excavators will exert higher ground pressures based on loaded bucket weight and boom extension. 4. Mini-excavators (< 8,000lbs/3,628 kg) can be used with at least 12” (300 mm) of stone over the chambers and are limited by the maximum ground pressures in Table 2 based on a full bucket at maximum boom extension. 5. Storage of materials such as construction materials, equipment, spoils, etc. should not be located over the StormTech system. The use of equipment over the StormTech system not covered in Table 2 (ex. soil mixing equipment, cranes, etc) is limited. Please contact StormTech for more information. 6. Allowable track loads based on vehicle travel only. Excavators VKDOOQRWRSHUDWHRQFKDPEHUEHGVXQWLOWKHWRWDOEDFNçOOUHDFKHV 3 feet (900 mm) over the entire bed. Material Location Fill Depth over Chambers in. [mm] Maximum Allowable Wheel Loads Maximum Allowable Track Loads6 Maximum Allowable Roller Loads Max Axle Load for Trucks lbs [kN] Max Wheel Load for Loaders lbs [kN] Track Width in. [mm] Max Ground Pressure psf [kPa] Max Drum Weight or Dynamic Force lbs [kN] D Final Fill Material 36” [900] Compacted 32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 3420 [164] 2350 [113] 1850 [89] 1510 [72] 1310 [63] 38,000 [169] C Initial Fill Material 24” [600] Compacted 32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 2480 [119] 1770 [85] 1430 [68] 1210 [58] 1070 [51] 20,000 [89] 24” [600] Loose/Dumped 32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 2245 [107] 1625 [78] 1325 [63] 1135 [54] 1010 [48] 20,000 [89] Roller gross vehicle weight not to exceed 12,000 lbs. [53 kN] 18” [450]32,000 [142]16,000 [71]12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 2010 [96] 1480 [71] 1220 [58] 1060 [51] 950 [45] 20,000 [89] Roller gross vehicle weight not to exceed 12,000 lbs. [53 kN] B Embedment Stone 12” [300]16,000 [71]NOT ALLOWED 12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 1540 [74] 1190 [57] 1010 [48] 910 [43] 840 [40] 20,000 [89] Roller gross vehicle weight not to exceed 12,000 lbs. [53 kN] 6” [150]8,000 [35]NOT ALLOWED 12” [305] 18” [457] 24” [610] 30” [762] 36” [914] 1070 [51] 900 [43] 800 [38] 760 [36] 720 [34] NOT ALLOWED Material Location Placement Methods/ Restrictions Wheel Load Restrictions Track Load Restrictions Roller Load Restrictions See Table 2 for Maximum Construction Loads D Final Fill Material A variety of placement methods may be used. All construction loads must not exceed the maximum limits in Table 2. 36” (900 mm) minimum cover required for dump trucks to dump over chambers. Dozers to push parallel to rows until 36” (900mm) compaced cover is reached.4 Roller travel parallel to rows only until 36” (900 mm) compacted cover is reached. C Initial Fill Material Excavator positioned off bed recommended. Small excavator allowed over chambers. Small dozer allowed. Asphalt can be dumped into paver when compacted pavement subbase reaches 18” (450 mm) above top of chambers. Small LGP track dozers & skid loaders allowed to grade cover stone with at least 6” (150 mm) stone under tracks at all times. Equipment must push parallel to rows at all times. Use dynamic force of roller only after compacted fill depth reaches 12” (300 mm) over chambers. Roller travel parallel to chamber rows only. B Embedment Stone No equipment allowed on bare chambers. Use excavator or stone conveyor positioned off bed or on foundation stone to evenly fill around all chambers to at least the top of chambers. No wheel loads allowed. Material must be placed outside the limits of the chamber bed. No tracked equipment is allowed on chambers until a min. 6” (150 mm) cover stone is in place. No rollers allowed. A Foundation Stone No StormTech restrictions. Contractor responsible for any conditions or requirements by others relative to subgrade bearing capacity, dewatering or protection of subgrade. Table 2 - Maximum Allowable Construction Vehicle Loads5 Table 3 - Placement Methods and Descriptions &DOO6WRUP7HFKDW888.892.2694IRUWHFKQLFDODQGSURGXFWLQIRUPDWLRQRUYLVLWZZZVWRUPWHFKFRP 6 20 Beaver Road, Suite 104 Wethersfield Connecticut 06109 888.892.2694 fax 866.328.8401 www.stormtech.com 17.0 Standard Limited Warranty STANDARD LIMITED WARRANTY OF STORMTECH LLC (“STORMTECH”): PRODUCTS (A) This Limited Warranty applies solely to the StormTech chambers and end plates manufactured by StormTech and sold to the original purchaser (the “Purchaser”). The chambers and end plates are collectively referred to as the “Products.” (B) The structural integrity of the Products, when installed strictly in accordance with StormTech’s written installation instructions at the time of installation, are warranted to the Purchaser against defective materials and workmanship for one (1) year from the date of purchase. Should a defect appear in the Limited Warranty period, the Purchaser shall provide StormTech with written notice of the alleged defect at StormTech’s corporate headquarters within ten (10) days of the discovery of the defect. The notice shall describe the alleged defect in reasonable detail. StormTech agrees to supply replacements for those Products determined by StormTech to be defective and covered by this Limited Warranty. The supply of replacement products is the sole remedy of the Purchaser for breaches of this Limited Warranty. StormTech’s liability specifically excludes the cost of removal and/or installation of the Products. (C) THIS LIMITED WARRANTY IS EXCLUSIVE. THERE ARE NO OTHER WARRANTIES WITH RESPECT TO THE PRODUCTS, INCLUDING NO IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A PARTICULAR PURPOSE. (D) This Limited Warranty only applies to the Products when the Products are installed in a single layer. UNDER NO CIRCUMSTANCES, SHALL THE PRODUCTS BE INSTALLED IN A MULTI-LAYER CONFIGURATION. (E) No representative of StormTech has the authority to change this Limited Warranty in any manner or to extend this Limited Warranty. This Limited Warranty does not apply to any person other than to the Purchaser. (F) Under no circumstances shall StormTech be liable to the Purchaser or to any third party for product liability claims; claims arising from the design, shipment, or installation of the Products, or the cost of other goods or services related to the purchase and installation of the Products. For this Limited Warranty to apply, the Products must be installed in accordance with all site conditions required by state and local codes; all other applicable laws; and StormTech’s written installation instructions. (G) THE LIMITED WARRANTY DOES NOT EXTEND TO INCIDENTAL, CONSEQUENTIAL, SPECIAL OR INDIRECT DAMAGES. STORMTECH SHALL NOT BE LIABLE FOR PENALTIES OR LIQUIDATED DAMAGES, INCLUDING LOSS OF PRODUCTION AND PROFITS; LABOR AND MATERIALS; OVERHEAD COSTS; OR OTHER LOSS OR EXPENSE INCURRED BY THE PURCHASER OR ANY THIRD PARTY. SPECIFICALLY EXCLUDED FROM LIMITED WARRANTY COVERAGE ARE DAMAGE TO THE PRODUCTS ARISING FROM ORDINARY WEAR AND TEAR; ALTERATION, ACCIDENT, MISUSE, ABUSE OR NEGLECT; THE PRODUCTS BEING SUBJECTED TO VEHICLE TRAFFIC OR OTHER CONDITIONS WHICH ARE NOT PERMITTED BY STORMTECH’S WRITTEN SPECIFICATIONS OR INSTALLATION INSTRUCTIONS; FAILURE TO MAINTAIN THE MINIMUM GROUND COVERS SET FORTH IN THE INSTALLATION INSTRUCTIONS; THE PLACEMENT OF IMPROPER MATERIALS INTO THE PRODUCTS; FAILURE OF THE PRODUCTS DUE TO IMPROPER SITING OR IMPROPER SIZING; OR ANY OTHER EVENT NOT CAUSED BY STORMTECH. A PRODUCT ALSO IS EXCLUDED FROM LIMITED WARRANTY COVERAGE IF SUCH PRODUCT IS USED IN A PROJECT OR SYSTEM IN WHICH ANY GEOTEXTILE PRODUCTS OTHER THAN THOSE PROVIDED BY ADVANCED DRAINAGE SYSTEMS ARE USED. THIS LIMITED WARRANTY REPRESENTS STORMTECH’S SOLE LIABILITY TO THE PURCHASER FOR CLAIMS RELATED TO THE PRODUCTS, WHETHER THE CLAIM IS BASED UPON CONTRACT, TORT, OR OTHER LEGAL THEORY. An company ADS “Terms and Conditions of Sale” can be found on the ADS website,www.ads-pipe.com Advanced Drainage Systems and the ADS logo is a registered trademark of Advanced Drainage Systems, Inc.Advanced Drainage Systems, Inc. #0601T 02/12 ADS GEOSYNTHETICS 0601T NONWOVEN GEOTEXTILE Scope This specification describes ADS Geosynthetics 6.0 oz (0601T) nonwoven geotextile. Filter Fabric Requirements ADS Geosynthetics 6.0 oz (0601T) is a needle-punched nonwoven geotextile made of 100% polypropylene staple fibers, which are formed into a random network for dimensional stability. ADS Geosynthetics 6.0 oz (0601T) resists ultraviolet deterioration, rotting, biological degradation, naturally encountered basics and acids. Polypropylene is stable within a pH range of 2 to 13. ADS Geosynthetics 6.0 oz (0601T) conforms to the physical property values listed below: Filter Fabric Properties PROPERTY TESTMETHOD UNIT M.A.R.V. (Minimum Average Roll Value) Weight (Typical) ASTM D 5261 oz/yd2 (g/m2)6.0 (203) Grab Tensile ASTM D 4632 lbs (kN) 160 (0.711) Grab Elongation ASTM D 4632 % 50 Trapezoid Tear Strength ASTM D 4533 lbs (kN) 60 (0.267) CBR Puncture Resistance ASTM D 6241 lbs (kN) 410 (1.82) Permittivity* ASTM D 4491 sec-1 1.5 Water Flow* ASTM D 4491 gpm/ft2 (l/min/m2)110 (4480) AOS* ASTM D 4751 US Sieve (mm) 70 (0.212) UV Resistance ASTM D 4355 %/hrs 70/500 PACKAGING Roll Dimensions (W x L) – ft 12.5 x 360 /15x300 Square Yards Per Roll 500 Estimated Roll Weight – lbs 195 * At the time of manufacturing. Handling may change these properties. ADS “Terms and Conditions of Sale” can be found on the ADS website,www.ads-pipe.com Advanced Drainage Systems and the ADS logo is a registered trademark of Advanced Drainage Systems, Inc.Advanced Drainage Systems, Inc. #315W 02/12 ADS GEOSYNTHETICS 315W WOVEN GEOTEXTILE Scope This specification describes ADS Geosynthetics 315W woven geotextile. Filter Fabric Requirements ADS Geosynthetics 315W is manufactured using high tenacity polypropylene yarns that are woven to form a dimensionally stable network, which allows the yarns to maintain their relative position. ADS Geosynthetics 315W resists ultraviolet deterioration, rotting and biological degradation and is inert to commonly encountered soil chemicals. ADS Geosynthetics 315W conforms to the physical property values listed below: Filter Fabric Properties PROPERTY TEST METHOD ENGLISHM.A.R.V. (Minimum Average Roll Value) METRICM.A.R.V. (Minimum Average Roll Value) Tensile Strength (Grab) ASTM D-4632 315 lbs 1400 N Elongation ASTM D-4632 15% 15% CBR Puncture ASTM D-6241 900 lbs 4005 N Puncture ASTM D-4833 150 lbs 667 N Mullen Burst ASTM D-3786 600 psi 4134 kPa Trapezoidal Tear ASTM D-4533 120 lbs 533 N UV Resistance (at 500 hrs) ASTM D-4355 70% 70% Apparent Opening Size (AOS)* ASTM D-4751 40 US Std. Sieve 0.425 mm Permittivity ASTM D-4491 .05 sec‾1 .05 sec‾1 Water Flow Rate ASTM D-4491 4 gpm/ft2 163 l/min/m2 Roll Sizes 12.5’ x 360’ 15.0’ x 300’ 17.5’ x 258’ 3.81 m x 109.8 m 4.57 m x 91.5 m 5.33 m x 78.6 m *Maximum average roll value. © AquaShieldTM, Inc. 2017. All rights reserved. Stormwater Treatment System Inspection and Maintenance Manual AquaShieldTM, Inc. 2733 Kanasita Drive Suite 111 Chattanooga, TN 37343 Toll free (888) 344-9044 Phone: (423) 870-8888 Fax: (423) 826-2112 Email: info@aquashieldinc.com www.aquashieldinc.com October 2017 © AquaShieldTM, Inc. 2017. All rights reserved. Floatable debris in the Aqua-Swirl® Aqua-Swirl® Stormwater Treatment System The Aqua-Swirl® Stormwater Treatment System (Aqua-Swirl®) is a vortex-type hydrodynamic separator designed and supplied by AquaShieldTM, Inc. (AquaShieldTM). Aqua-Swirl® technology removes pollutants including suspended solids, trash, floatables and free-floating oil from stormwater runoff. Both treatment and storage are accomplished in the single swirl chamber without the use of multiple or hidden, blind access chambers. Aqua-Swirl® System Maintenance The long term performance of any stormwater treatment structure, including manufactured or land based systems, depends on a consistent maintenance plan. Inspection and maintenance functions are simple and easy for the Aqua-Swirl® allowing all inspections to be performed from the surface. It is important that a routine inspection and maintenance program be established for each unit based on: (a) the volume or load of the contaminants of concern, (b) the frequency of releases of contaminants at the facility or location, and (c) the nature of the area being drained. © AquaShieldTM, Inc. 2017. All rights reserved. Example of Aqua-Swirl® manhole cover Inspection The Aqua-Swirl® can be inspected from the surface thereby eliminating the need to enter the system to determine when cleanout should be performed. AquaShieldTM recommends in most cases that a quarterly inspection take place for the first year of operation to develop an appropriate schedule of maintenance. Based on experience of the system’s first year in operation, we recommend that the inspection schedule be revised to reflect the site-specific conditions encountered. The typical inspection schedule for subsequent years is reduced to semi-annual inspection events. Table 1 below lists the available Aqua-Swirl® models as well their inner diameters, oil/debris storage capacities and the sediment storage capacities. Table 1. Aqua-Swirl® Storage Capacities Aqua-Swirl® Model Inner Diameter (ft) Oil/Debris Storage Capacity (gal) Sediment Storage Capacity (ft3) AS-2 2.5 37 6 AS-3 3.5 110 11 AS-4 4.5 190 19 AS-5 5.0 270 23 AS-6 6.0 390 33 AS-7 7.0 540 45 AS-8 8.0 710 58 AS-9 9.0 910 74 AS-10 10.0 1,130 91 AS-11 11.0 1,422 110 AS-12 12.0 1,698 131 AS-13 13.0 1,986 154 AS-XX Custom* * Custom designs to meet site-specific criteria, can include multiple (twin) units for increased flow and materials storage capacity. © AquaShieldTM, Inc. 2017. All rights reserved. Sediment inspection using a stadia rod Maintenance The Aqua-Swirl® has been designed to minimize and simplify the inspection and maintenance process. The single chamber of the system can be inspected and maintained entirely from the surface thereby eliminating the need for confined space entry. There are no areas of the structure that are blocked from visual inspection or periodic cleaning. Inspection of any free-floating oil and floatable trash can be directly observed and maintained through the manhole access provided directly over the swirl chamber. If so equipped, the trash screen can be exposed once the water is removed from the unit and inspected. Aqua-Swirl® Inspection Procedure To inspect the Aqua-Swirl®, a hook is typically needed to remove the manhole cover. AquaShieldTM provides a customized manhole cover with our distinctive logo to make it easy for maintenance crews to locate the system in the field. We also provide a permanent metal information plate affixed inside the access riser which provides our contact information, the Aqua-Swirl® model size, and serial number. The only tools needed to inspect the Aqua-Swirl® system are a flashlight and a measuring device such as a stadia rod or pole. Given the easy and direct accessibility provided, floating oil and debris can be observed directly from the surface. Sediment depths can easily be determined by lowering a measuring device to the top of the sediment pile and to the surface of the water. It should be noted that in order to avoid underestimating the volume of sediment in the chamber, the measuring device must be carefully lowered to the top of the sediment pile. Keep in mind that the finer sediment at the top of the pile may offer less resistance to the measuring device than the larger particles which typically occur deeper within the sediment pile. The Aqua-Swirl® design allows for the captured sediment to accumulate in a semi-conical fashion as illustrated below. That is, the depth to sediment as measured below the water surface may be less in the center of the swirl chamber; and likewise, may be greater at the edges of the swirl chamber. ” © AquaShieldTM, Inc. 2017. All rights reserved. Maximum recommended sediment depth prior to cleanout is 14 inches for all Aqua-Swirl® models (not to scale) Aqua-Swirl® Cleanout Procedure Cleaning the Aqua-Swirl® is simple and quick. Free-floating oil and floatable trash can be observed and removed directly through the 30-inch service access riser provided. A vacuum truck is typically used to remove the accumulated sediment and debris. An advantage of the Aqua-Swirl® design is that the entire sediment storage area can be reached with a vacuum hose from the surface reaching all the sides. Since there are no multiple or limited (blind) access chambers in the Aqua-Swirl®, there are no restrictions to impede on-site maintenance tasks. If applicable, the trash screen can be reached from the surface and cleaned with a vacuum hose. Disposal of Recovered Materials AquaShieldTM recommends that all maintenance activities be performed in accordance with appropriate health and safety practices for the tasks and equipment being used. AquaShieldTM also recommends that all materials removed from the Aqua-Swirl® and any external bypass structures (divergent and convergent) be handled and disposed of in full accordance with any applicable local and state requirements. 14” © AquaShieldTM, Inc. 2017. All rights reserved. Vacuum (vactor) truck quickly cleans the single open access swirl chamber Aqua-Swirl® Inspection and Maintenance Work Sheets on following pages © AquaShieldTM, Inc. 2017. All rights reserved. Aqua-Swirl® Inspection and Maintenance Work Sheets SITE and OWNER INFORMATION Site Name: Site Location: Date: Time: Inspector Name: Inspector Company: Phone #: Owner Name: Owner Address: Owner Phone #: Emergency Phone #: INSPECTIONS I. Floatable Trash/Debris and Oil 1. Remove manhole lid to expose liquid surface of the Aqua-Swirl®. 2. Remove floatable trash/debris with basket or net if any present. 3. If oil is present, measure its depth. Clean liquids from system if one half (½) inch or more of oil and/or trash is present. 4. If applicable, clean trash screen surface with vacuum hose. Note: Water in Aqua-Swirl® can appear black and similar to oil due to the dark body of the surrounding structure. Oil may appear darker than water in the system and is usually accompanied by oil stained debris (e.g. Styrofoam, etc.). The depth of oil can be measured with an oil/water interface probe, a stadia rod with water finding paste, a coliwasa, or collect a representative sample with a jar attached to a rod. II. Sediment Accumulation 1. Lower measuring device (e.g. stadia rod) into swirl chamber through service access provided until top of sediment pile is reached. 2. Record distance to top of sediment pile from top of standing water: inches. 3. Maximum recommended sediment depth prior to cleanout is 14 inches for all models. Consult system shop drawing for treatment chamber depth as measured from the inlet pipe invert to base of the unit. © AquaShieldTM, Inc. 2017. All rights reserved. III. Diversion Structures (External Bypass Features) If a diversion (external bypass) configuration is present, it should be inspected as follows: 1. Inspect weir or other bypass feature for structural decay or damage. Weirs are more susceptible to damage than off-set piping and should be checked to confirm that they are not crumbling (concrete or brick) or decaying (steel). 2. Inspect diversion structure and bypass piping for signs of structural damage or blockage from debris or sediment accumulation. 3. When feasible, measure elevations on diversion weir or piping to ensure it is consistent with site plan designs. 4. Inspect downstream (convergence) structure(s) for sign of blockage or structural failure as noted above. CLEANING Schedule cleaning with local vactor company to remove sediment, trash, oil and other floatable pollutants. The captured material generally does not require special treatment or handling for disposal. Site-specific conditions or the presence of known contaminants may necessitate that appropriate actions be taken to clean and dispose of materials captured and retained by the Aqua- Swirl®. All cleaning activities should be performed in accordance with property health and safety procedures. AquaShieldTM always recommends that all materials removed from the Aqua-Swirl® during the maintenance process be handled and disposed in accordance with local and state environmental or other regulatory requirements. MAINTENANCE SCHEDULE I. During Construction Inspect the Aqua-Swirl® full capture device every three (3) months and clean the system as needed. The Aqua-Swirl® should be inspected and cleaned at the end of construction regardless of whether it has reached its maintenance trigger. II. First Year Post-Construction Inspect the Aqua-Swirl® every three (3) months and clean the system as needed. Inspect and clean the system once annually regardless of whether it has reached its sediment, trash or floatable pollutant storage capacity. III. Second and Subsequent Years Post-Construction If the Aqua-Swirl® did not reach full sediment or floatable trash capacity in the First Year Post-Construction period, the system can be inspected and cleaned once annually. © AquaShieldTM, Inc. 2017. All rights reserved. If the Aqua-Swirl® reached full sediment, trash or floatable pollutant capacity in less than 12 months in the First Year Post-Construction period, the system should be inspected once every six (6) months and cleaned as needed. The Aqua-Swirl® should be cleaned annually regardless of whether it reaches its sediment, trash or floatable pollutant capacity. IV. Bypass Structures Bypass structures should be inspected whenever the Aqua-Swirl® is inspected. Maintenance should be performed on bypass structures as needed. MAINTENANCE COMPANY INFORMATION Company Name: Street Address: City: State/Prov.: Zip/Postal Code: Contact: Title: Office Phone: Cell Phone: ACTIVITY LOG Date of Cleaning: (Next inspection should be 3 months from this data for first year). Time of Cleaning: Start: End: Date of Next Inspection: Floatable debris present: Yes No Notes: Oil present: Yes No Oil depth (inches): Measurement method and notes: © AquaShieldTM, Inc. 2017. All rights reserved. STRUCTURAL CONDITIONS and OBSERVATIONS Structural damage: Yes No Where: Structural wear: Yes No Where: Odors present: Yes No Describe: Clogging: Yes No Describe: Other Observations: NOTES Additional Comments and/or Actions To Be Taken Time Frame ATTACHMENTS • Attach site plan showing Aqua-Swirl® location. • Attach detail drawing showing Aqua-Swirl® dimensions and model number. • If a diversion configuration is used, attach details showing basic design and elevations (where feasible). © AquaShieldTM, Inc. 2017. All rights reserved. Aqua-Swirl® TABULAR MAINTENANCE SCHEDULE Date Construction Started: Date Construction Ended: During Construction Month Activity 1 2 3 4 5 6 7 8 9 10 11 12 Inspect and Clean as needed X X X X Inspect Bypass and maintain as needed X X X X Clean System* X* * The Aqua-Swirl® should be cleaned once a year regardless of whether it has reached full pollutant storage capacity. In addition, the system should be cleaned at the end of construction regardless of whether it has reach full pollutant storage capacity. First Year Post-Construction Month Activity 1 2 3 4 5 6 7 8 9 10 11 12 Inspect and Clean as needed X X X X Inspect Bypass and maintain as needed X X X X Clean System* X* * The Aqua-Swirl® should be cleaned once a year regardless of whether it has reached full pollutant storage capacity. Second and Subsequent Years Post-Construction Month Activity 1 2 3 4 5 6 7 8 9 10 11 12 Inspect and Clean as needed X* Inspect Bypass, maintain as needed X* Clean System* X* * If the Aqua-Swirl® did not reach full sediment or floatable pollutant capacity in the First Year Post -Construction period, the system can be inspected and cleaned once annually. If the Aqua-Swirl® reached full sediment, trash or floatable pollutant capacity in less than 12 months in the First Year Post-Construction period, the system should be inspected once every six (6) months or more frequently if past history warrants, and cleaned as needed. The Aqua-Swirl® should be cleaned annually regardless of whether it reaches its full sediment, trash or floatable pollutant capacity.