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HomeMy WebLinkAbout19012L-Report-O&M-May2020 OPERATIONS & MAINTENANCE MANUAL FOR POST-CONSTRUCTION MEASURES Carmel Elementary Reconstruction 101 4th Avenue SE, Carmel, Indiana 46032 Karen K. Collins, PE Indiana registration No. 10404538 PREPARED FOR CARMEL CLAY SCHOOLS 5201 EAST MAIN STREET CARMEL, IN 46033 November 2019 REVISED JANUARY 2020 REVISED FEBRUARY 2020 REVISED MAY 2020 8365 Keystone Crossing, Suite 201 Indianapolis, Indiana 46240 Phone: (317) 202-0864 Fax: (317)202-0908 I, Paul Nashert, affirm, under the penalty of perjury, that I have taken reasonable care to redact each social security number, unless required by law. 05/27/20 Carmel Elementary School Clay Center Road Elementary OPERATIONS & MAINTENANCE MANUAL Table of Contents 1. BMP and facilities Owner 2. Definition of Best Management Practice (BMP) 3. Description of BMPs a. Xcelerator XC-5 & XC-6 4. Inspection and Maintenance a. Xcelerator XC-5 & XC-6 5. Description of facilities a. Underground Dry Pond 6. Inspection and Maintenance a. Underground Dry Pond 7. Owner Acknowledgement Agreement 8. Operation, Maintenance and Management Inspection Checklists 9. BMP Location & Facilities Maps 10. BMP & Facilities Details a. Xcelerator XC-5 b. Xcelerator XC-6 c. Underground Dry Pond 05/27/20 Carmel Elementary School 1. BMP AND FACILITIES OWNER Name: Carmel Clay School District Attn. Mr. Ron Farrand Jr., RA Address: 5201 East 131st Street Carmel, IN 46033 Phone: 317-815-3962 2. DEFINITION OF A BEST MANAGEMENT PRACTICE (BMP) A Best Management Practice (BMP) is defined as a structural measure (wetland, pond, vegetated swale, sand filter, etc.) designed to benefit water quality and quantity. Storm water can easily become polluted by grease, oil, sediment, chemicals, and other contaminants as it travels to an inlet or receiving water. The purpose of a BMP is to improve storm water quality primarily through the removal of Total Suspended Solids (TSS). The City of Carmel has Right-of-Entry to the development to inspect and maintain the BMP as necessary. Easement(s) have been provided around the BMPs for this development, with implied access as needed. 3. DESCRIPTION OF BMPs: Xcelerator: BMP #1, the Xcelerator XC-5 & XC-6 hydrodynamic swirl filter, is used to treat storm water on this site. The Xcelerator filter provides treatment for the most contaminated first flush, while the cleaner peak storm runoff is diverted through the main conveyance pipe. The operation begins when storm water enters the Xcelerator through a tangential inlet pipe which produces a circular (or vortex) flow pattern that causes contaminates to settle. Because storm water flow is intermittent by nature, the Xcelerator Concentrator retains water between storm events providing both dynamic and quiescent settling of inorganic solids. The dynamic settling occurs during each storm event, while the quiescent settling takes place between successive storms. A combination of gravitational and hydrodynamic drag forces encourages the solids to drop out of the flow and migrate to the center of the chamber where velocities are the lowest. 4. INSPECTION AND MAINTENANCE Xcelerator: • BMP Owner 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 can range from dredging/pumping sediment out of the treatment structures to repairing any damage that has affected the structure’s integrity and function. 05/27/20 Carmel Elementary School • 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 outlined in this text. •BMP Owner shall keep the BMP free from litter, floating pollutants, and sediment accumulated above levels outlined in this text. •Representatives from the City of Carmel have the right to enter this property to inspect the BMPs. The BMP Owner shall be financially responsible for any maintenance, repairs, or recommendations for modification as required by the City of Carmel or its representatives during inspections. •Refer to the checklists with this Manual for guidance on BMP inspections. •Inspections must be documented on the inspection forms included in this manual. 5. DESCRIPTION OF FACILITIES: Underground Dry Pond: the underground dry pond with is used to detain storm water on this site. 6. INSPECTION AND MAINTENANCE Underground Dry Pond: • The checklist is for the use of the facility owner in performing routine inspections. The City of Carmel may perform inspections of the facility using a similar checklist. The facility owner is responsible for the cost of maintenance and annual inspections. The facility owner must maintain and update the facility operations and maintenance plan. At a minimum the operations and maintenance plan must include, but is not limited to: • -Restore and stabilize any erosion. • -Restorative maintenance involving removal of any litter, pollutants, excessive accumulated debris or sediment. This may include skimming, dredging or vacuum removal. • Facility Owner must routinely inspect facility to verify that all facility components are functioning as designed and are not in danger of failing. All facilities need maintenance to function effectively as water quality (and peak attenuation / mitigation) enhancements. • Inspections must be documented on the inspection form included in this manual. Maintenance of all storm water pollution & prevention plan (SWPPP) measures will be the responsibility of the project owner, utilizing procedures outlined in this manual for post 05/27/20 Carmel Elementary School construction water quality measures. • Inspect outlet structure and remove any litter, debris or clogging as needed to restore function. • Do not place any fill (or any other material) in the detention basin. • Deep-rooted plants and trees are not allowed in the vicinity of the detention basin. • During the first year, monthly to semi-monthly (6 to 12 times in the year) inspections shall be performed. • After the first year, quarterly (four times a year) inspections should be performed. 05/27/20 Carmel Elementary School 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, or on a schedule set by the City of Carmel. 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. Send to: City of Carmel Engineering Department Storm Water O & M Program Manager 1 Civic Square Carmel, IN 46032 This Operation and Maintenance Manual is submitted to the City of Carmel, IN with the intent of insuring the longevity and adequate functioning of all BMPs (and facilities). The BMP Owner noted is responsible for any additional maintenance and/or repair activities noted in this text as required by the City of Carmel, and any activities required to maintain the function and longevity of the BMP, including, if necessary, measures and / or practices that are above and beyond what is herein described. Right of Entry to the City of Carmel A permanent “Access & BMP Easement” shall be created which matches the one shown on the plans. Right of Entry is hereby granted to the City of Carmel for access, inspection and maintenance of the drainage facilities. 05/27/20 Carmel Elementary School 7. OWNER ACKNOWLEDGMENT AGREEMENT 05/27/20 Carmel Elementary School 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”) and facilities listed below, and to follow and abide by the inspection schedule and maintenance activities listed in this Manual. The Owner also hereby agrees to provide, at Owner’s cost, all additional maintenance, repair, and/or replacement services reasonably necessary to maintain the function and longevity of the BMP 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. The City of Carmel is Granted Authority to access the BMPs. BMPs and facilities:_Two (2) Xcelerator XC-6, One (1) Xcelerator XC-5, and Underground Dry Pond_____ _______________________________ ___________________________ 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 05/27/20 05/27/20 Carmel Elementary School Xcelerator Inspection Check List 05/27/20 Site Name: 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 Indianapolis 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. The sludge should not exceed 12" depth before maintenance. See Figures 1 and 2. 12" Figure 1 Figure 2 Aqua-Swirl TM XCelerator ® Inspection Maintenance Items Operation, Maintenance, and Inspection Manual for BMP Owners (Note: Attach certifications for local regulatory authority including any applicable fees.) City of Carmel, Indiana Site and Owner Information Aqua-SwirlTM O and M Manual Page 1 05/27/20 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. Second and Subsequent Years Post-Construction 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 and cleaned as needed or bi-annually at a minimum. 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 at least once every six months and cleaned as needed. If site monitoring indicates that trapped sediment hardens over time, the AquaSwirlTM should be cleaned prior to sediment hardening regardless of whether it has reached its sediment storage 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 05/27/20 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 05/27/20 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-Swirl TM O and M Manual Page 4 05/27/20 Date Construction Started: Date Construction Ended: Activity 1 2 3 4 5 6 7 8 9 10 11 12 Inspect and Clean as Needed X X X X Inspect Bypass Structures X X X X (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 1 2 3 4 5 6 7 8 9 10 11 12 Inspect and Clean as Needed X X Inspect Bypass Structures X X (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 1 2 3 4 5 6 7 8 9 10 11 12 Inspect and Clean as Needed* X X Inspect Bypass Structures* X X (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. Second and Subsequent Years Post-Construction Month During Construction Month First Year Post-Construction Month Aqua-Swirl TM TABULAR MAINTENANCE SCHEDULE Aqua-SwirlTM O and M Manual Page 5 05/27/20 Aqua-SwirlTM O and M Manual Page 6 05/27/20 city. Aqua-SwirlTM O and M Manual Page 7 05/27/20 Carmel Elementary School Underground Dry Pond Inspection Check List 05/27/20 05/27/20 Underground stormwater detention and infiltration systems must be inspected and maintained at regular intervals for purposes of performance and longevity. Inspection Inspection is the key to effective maintenance of CMP detention systems and is easily performed. Contech recommends ongoing, annual inspections. Sites with high trash load or small outlet control orifices may need more frequent inspections. The rate at which the system collects pollutants will depend more on- site specific activities rather than the size or configuration of the system. Inspections should be performed more often in equipment washdown areas, in climates where sanding and/or salting operations take place, and in other various instances in which one would expect higher accumulations of sediment or abrasive/ corrosive conditions. A record of each inspection is to be maintained for the life of the system. 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. CMP MAINTENANCE GUIDE 10/19 PDF © 2019 CONTECH ENGINEERED SOLUTIONS LLC, A QUIKRETE COMPANY ALL RIGHTS RESERVED. PRINTED IN USA. Maintenance CMP detention systems should be cleaned when an inspection reveals accumulated sediment or trash is clogging the discharge orifice. Accumulated sediment and trash can typically be evacuated through the manhole over the outlet orifice. If maintenance is not performed as recommended, sediment and trash may accumulate in front of the outlet orifice. Manhole covers should be securely seated following cleaning activities. Contech suggests that all systems be designed with an access/inspection manhole situated at or near the inlet and the outlet orifice. Should it be necessary to get inside the system to perform maintenance activities, all appropriate precautions regarding confined space entry and OSHA regulations should be followed. Annual inspections are best practice for all underground systems. During this inspection if evidence of salting/de-icing agents is observed within the system, it is best practice for the system to be rinsed, including above the spring line soon after the spring thaw as part of the maintenance program for the system. Maintaining an underground detention or infiltration system is easiest when there is no flow entering the system. For this reason, it is a good idea to schedule the cleanout during dry weather. The foregoing inspection and maintenance efforts help ensure underground pipe systems used for stormwater storage continue to function as intended by identifying recommended regular inspection and maintenance practices. Inspection and maintenance related to the structural integrity of the pipe or the soundness of pipe joint connections is beyond the scope of this guide. Contech ® CMP Detention Inspection and Maintenance Guide ENGINEERED SOLUTIONS CMP DETENTION SYSTEMS 05/27/20 Carmel Elementary School 9. BMP AND FACILITIES LOCATION MAP 05/27/20 6''SSD6''SSD6''SSD6''SSD 6''SSD6''SSD6''SSD 6''SSD 6''SSD6''SSDTSTOPSTOP DO NOTENTERSTO P 1234567891012345678910STOP STOPBUSONLYDRIVE TO BE CONSTRUCTED BY OTHERS WALK TO BE CONSTRUCTED BY OTHERSRDRDNO PARKINGNO PARKI NGNO PARKINGOHUOHUOHU OHU OHUOHU OHUOHU OHU OHU OHU OHU OHU OHU OHU OHU OHU OHU OHU OHUOHUOHU OHU 4TH AVE N U E STOPSTOP DO NOTENTERSTO P 12345 678 910123 45678910STOP STOPBUSONLYDRIVE TO BE CONST RUCTED BY OTHERS WAL K TO BE CONSTRUCTED BY OTHERSFACILITY: UNDERGROUND DRY PONDBMP: XC-6 BMP: XC-6 BMP: XC-7 BMP & ACCESS EASEMENT SHEET No. SCALE: Date:PROJECT:TITLE: Job No.8365 Keystone Crossing, Suite 201Indianapolis, IN. 46240 (317) 202-0864BMP & FACILITIESLOCATION MAP P1 01-03-20 1"= 120' 05/27/20 Carmel Elementary School 10. BMP AND FACILITIES DETAILS 05/27/20 Plan View SCALE 1:40 Elevation View SCALE 1:40 Projected View SCALE 1:70 2733 Kanasita Drive, Suite 111, Chattanooga, TN 37343 Phone (888) 344-9044 Fax (423) 826-2112 www.aquashieldinc.com Structure #: Drawn By: Scale: Date: OFlores 6/26/2019 Rvwed Rvw. Date U.S. Patent No. 6524473 and other Patent Pending Aqua-Swirl XCelerator Aqua-Swirl Stormwater Treatment System Standard Detail As Shown el. Varies Inlet/Outlet Invert el. Varies el. Varies Grade (Rim) el. Varies XC-7 CCW STD XC-7 STD Aqua-Swirl Polymer Coated Steel (PCS) Stormwater Treatment System 12 in [305 mm] Manhole Frame & Cover Detail For Non-Traffic Areas Only NTS 4 in [1219 mm] Min. Gravel Backfill Concrete Wrap Compressible Expansion Joint Material to a minimum 1/2-inch [13 mm] thickness around top of riser to allow transfer of inadvertent loading from manhole cover to concrete slab. Riser Soil Cover Frame 1/2 in [13 mm] 1/2 in [13 mm] Place small amount of concrete [3,000 psi [20 MPa] (min)] to support and level manhole frame. DO NOT allow manhole frame to rest upon riser. Backfill (90% Proctor Density) 8 in [203 mm] 4 1/2 in [114 mm] Unless other traffic barriers are present, bollards shall be placed around access riser(s) in non-traffic areas to prevent inadvertent loading by maintenance vehicles. Manhole Frame & Cover Detail For Traffic Loading Areas NTS Cover Frame 48 in [1219 mm] Min. Backfill (90% Proctor Density) 3,000 psi [20 MPa] (min) Concrete #4 [13 mm] Rebar @ 6 in [152 mm] Each Way 30 in [762 mm] Riser 1/2 in [13 mm] 4 1/2 in [114 mm] 14 in [356 mm] 1/2 in [13 mm] Thick Expansion Joint Material If traffic loading (HS-25) is required or anticipated, a 4-foot [1.22 m] diameter, 14-inch [356 mm] thick reinforced concrete pad must be placed over the Stormwater Treatment System Riser to support and level the manhole frame, as shown. The top of riser pipe must be wrapped with compressible expansion joint material to a minimum 1/2-inch [13 mm] thickness to allow transfer of wheel loads from manhole cover to concrete slab. Manhole cover shall bear on concrete slab and not on riser pipe. The concrete slab shall have a minimum strength of 3,000 psi [20 MPa] and be reinforced with #4 [13 mm] reinforcing steel as shown. Minimum cover over reinforcing steel shall be 1-inch [25 mm]. Top of manhole cover and concrete slab shall be level with finish grade. Please see accompanied Aqua-Swirl specification notes. See Site Plan for actual System orientation. Approximate dry (pick) weight: 3800 lbs [1700 kg]. Backfill shall extend at least 18 inches [457 mm] outward from Swirl Concentrator and for the full height of the Swirl Concentrator (including riser) extending laterally to undisturbed soils. (See MH Detail Below) Backfill Bedding Undisturbed soil 18 in [457 mm] 6 in [152 mm] 1 1 As an alternative, 42 in [1067 mm] diameter, HS-20/25 rated precast concrete rings may be substituted. 14 in [356 mm] thickness must be maintained. XC-7 inlet/outlet pipe size ranges up to 42 in [1067 mm]. XC-7 chamber height may vary up to 151 in [3835 mm], depending on inlet/outlet pipe size. Orientation may vary from a minimum of 90ƒ to a maximum of 180ƒ. Clockwise or counterclockwise orientation as needed. 2 3 3 2 96 in [2438 mm] 96 in [2438 mm] P42 in [P1067 mm] P42 in [P1067 mm] 2 Octagonal Base Plate P84 in [P2137 mm] 85 in [2159 mm] 151 in [3835 mm] Varies Varies 5 [127 mm] MH Frame P30 in [P762 mm] Band Coupler by Manufacturer. (as needed)Riser Manhole Frame and Cover by Manufacturer. (See Details) Rim elevations to match finish grade. Pipe coupling by Contractor. 12 in [305 mm] long Stub-out by Manufacturer. 4 4 Pipe coupling by Contractor. 12 in [305 mm] long Stub-out by Manufacturer. 180ƒP84 in [P2134 mm] Optional inlet orientations available (See note 4) 05/27/20 Plan View SCALE 1:50 Elevation View SCALE 1:50 Projected View SCALE 1:80 2733 Kanasita Drive, Suite 111, Chattanooga, TN 37343 Phone (888) 344-9044 Fax (423) 826-2112 www.aquashieldinc.com Structure #: Drawn By: Scale: Date: OFlores 6/26/2019 Rvwed Rvw. Date U.S. Patent No. 6524473 and other Patent Pending Aqua-Swirl XCelerator Aqua-Swirl Stormwater Treatment System Standard Detail As Shown el. Varies Inlet/Outlet Invert el. Varies el. Varies Grade (Rim) el. Varies XC-8 CCW STD XC-8 STD Aqua-Swirl Polymer Coated Steel (PCS) Stormwater Treatment System 12 in [305 mm] Manhole Frame & Cover Detail For Non-Traffic Areas Only NTS 4 in [1219 mm] Min. Gravel Backfill Concrete Wrap Compressible Expansion Joint Material to a minimum 1/2-inch [13 mm] thickness around top of riser to allow transfer of inadvertent loading from manhole cover to concrete slab. Riser Soil Cover Frame 1/2 in [13 mm] 1/2 in [13 mm] Place small amount of concrete [3,000 psi [20 MPa] (min)] to support and level manhole frame. DO NOT allow manhole frame to rest upon riser. Backfill (90% Proctor Density) 8 in [203 mm] 4 1/2 in [114 mm] Unless other traffic barriers are present, bollards shall be placed around access riser(s) in non-traffic areas to prevent inadvertent loading by maintenance vehicles. Manhole Frame & Cover Detail For Traffic Loading Areas NTS Cover Frame 48 in [1219 mm] Min. Backfill (90% Proctor Density) 3,000 psi [20 MPa] (min) Concrete #4 [13 mm] Rebar @ 6 in [152 mm] Each Way 30 in [762 mm] Riser 1/2 in [13 mm] 4 1/2 in [114 mm] 14 in [356 mm] 1/2 in [13 mm] Thick Expansion Joint Material If traffic loading (HS-25) is required or anticipated, a 4-foot [1.22 m] diameter, 14-inch [356 mm] thick reinforced concrete pad must be placed over the Stormwater Treatment System Riser to support and level the manhole frame, as shown. The top of riser pipe must be wrapped with compressible expansion joint material to a minimum 1/2-inch [13 mm] thickness to allow transfer of wheel loads from manhole cover to concrete slab. Manhole cover shall bear on concrete slab and not on riser pipe. The concrete slab shall have a minimum strength of 3,000 psi [20 MPa] and be reinforced with #4 [13 mm] reinforcing steel as shown. Minimum cover over reinforcing steel shall be 1-inch [25 mm]. Top of manhole cover and concrete slab shall be level with finish grade. Please see accompanied Aqua-Swirl specification notes. See Site Plan for actual System orientation. Approximate dry (pick) weight: 5000 lbs [2300 kg]. Backfill shall extend at least 18 inches [457 mm] outward from Swirl Concentrator and for the full height of the Swirl Concentrator (including riser) extending laterally to undisturbed soils. (See MH Detail Below) Backfill Bedding Undisturbed soil 18 in [457 mm] 6 in [152 mm] 1 1 As an alternative, 42 in [1067 mm] diameter, HS-20/25 rated precast concrete rings may be substituted. 14 in [356 mm] thickness must be maintained. XC-8 inlet/outlet pipe size ranges up to 48 in [1219 mm]. XC-8 chamber height may vary up to 167 in [4242 mm], depending on inlet/outlet pipe size. Orientation may vary from a minimum of 90ƒ to a maximum of 180ƒ. Clockwise or counterclockwise orientation as needed. 2 3 3 2 108 in [2743 mm] 108 in [2743 mm] P48 in [P1219 mm] P48 in [P1219 mm] 2 Octagonal Base Plate P96 in [P2442 mm] 95 in [2413 mm] 167 in [4242 mm] Varies Varies 5 [127 mm] MH Frame P30 in [P762 mm] Band Coupler by Manufacturer. (as needed)Riser Manhole Frame and Cover by Manufacturer. (See Details) Rim elevations to match finish grade. Pipe coupling by Contractor. 12 in [305 mm] long Stub-out by Manufacturer. 4 4 Pipe coupling by Contractor. 12 in [305 mm] long Stub-out by Manufacturer. 180ƒ P96 in [P2438 mm] Optional inlet orientations available (See note 4) 05/27/20 ACCESS HATCH ACCESS HATCH ACCESS HATCH 05/27/20 1.75" CCTYPCOIL WIDTH OPEN AREA = 3.33 SQ IN/SQ FT 2.711" 9@2.711" = 24.399" EDGE SPACING EQUAL ON BOTH SIDES NOTES: 1. PERFORATIONS MEET AASHTO AND ASTM SPECIFICATIONS. 2. PERFORATION OPEN AREA PER SQUARE FOOT OF PIPE IS BASED ON THE NOMINAL DIAMETER AND LENGTH OF PIPE. 3. DIMENSIONS SUBJECT TO MANUFACTURER'S TOLERANCES. 4. ALL HOLES 3/8"Ø. EXFILTRATION AREA STANDARD PERFORATION PATTERNS APPROXIMATE AREA PER LINEAR FOOT OF PIPE PIPE CORRUGATION PATTERN 2 2/3" x 1/2" 3" x 1" 5" x 1" ULTRA FLO 84"Ø 85.5 SQ. IN. 90.3 SQ. IN. 87.9 SQ. IN. NOTES: · GAGE AND COATING LIMITATIONS APPLY. 5" x 1" IS NOT AVAILABLE IN ALUMINUM. · DIMENSIONS SUBJECT TO MANUFACTURER'S TOLERANCES. TYPICAL PERFORATION DETAIL NOT TO SCALE TYPICAL SECTION VIEW NOT TO SCALE NOTE: IF SALTING AGENTS FOR SNOW AND ICE REMOVAL ARE USED ON OR NEAR THE PROJECT, A GEOMEMBRANE BARRIER IS RECOMMENDED WITH THE SYSTEM. THE GEOMEMBRANE LINER IS INTENDED TO HELP PROTECT THE SYSTEM FROM THE POTENTIAL ADVERSE EFFECTS THAT MAY RESULT FROM A CHANGE IN THE SURROUNDING ENVIRONMENT OVER A PERIOD OF TIME. PLEASE REFER TO THE CORRUGATED METAL PIPE DETENTION DESIGN GUIDE FOR ADDITIONAL INFORMATION. 84" TYP. 36" TYP.27" SEE TYPICAL BACKFILL DETAIL NOTES LIMITS OF REQUIRED BACKFILL 20 MIL PE IMPERMEABLE LINER OVER TOP OF PIPE (IF REQUIRED) 1 MINIMUM TRENCH WIDTH MUST ALLOW ROOM FOR PROPER COMPACTION OF HAUNCH MATERIALS UNDER THE PIPE. THE TRENCH WIDTH IS THE MINIMUM AMOUNT REQUIRED FOR PROPER INSTALLATION AND TO SUPPORT HORIZONTAL PRESSURE FROM THE PIPE. THE MANUFACTURER'S SUGGESTED MINIMUM VALUE IS: 1.5D + 12". 1a MINIMUM EMBANKMENT WIDTH (IN FEET) FOR INITIAL FILL ENVELOPE: 3.0D BUT NO LESS THAN D + 4'0". 2 FOUNDATION SHALL BE WELL CONSOLIDATED & STABLE, CAPABLE OF SUPPORTING FILL MATERIAL LOAD. 3 OPEN-GRADED GRANULAR BEDDING MATERIAL SHALL BE A RELATIVELY LOOSE MATERIAL THAT IS ROUGHLY SHAPED TO FIT THE BOTTOM OF THE PIPE, 4" TO 6" IN DEPTH. SUGGESTED PARTICLE SIZE OF 1/2 CORRUGATION DEPTH. 4 CORRUGATED STEEL PIPE (CSP / HEL-COR). 5 HAUNCH ZONE MATERIAL SHALL BE HAND SHOVELED OR SHOVEL SLICED INTO PLACE TO ALLOW FOR PROPER COMPACTION. 5a THE BACKFILL MATERIAL SHALL BE A FREE-DRAINING, ANGULAR, WASHED-STONE PER AASHTO M 43 SIZE #3 WITH A ½” - 2” PARTICLE SIZE OR APPROVED EQUAL. MATERIAL SHALL BE PLACED IN 12" MAXIMUM LIFTS AND SHALL BE WORKED INTO THE PIPE HAUNCHES BY MEANS OF SHOVEL-SLICING, RODDING, AIR-TAMPER, VIBRATORY PLATE OR OTHER EFFECTIVE METHODS. COMPACTION IS CONSIDERED ADEQUATE WHEN A DENSITY EQUIVALENT TO 90% STANDARD PROCTOR IS ACHIEVED OR WHEN NO FURTHER YIELDING OF THE MATERIAL IS OBSERVED UNDER THE COMPACTOR OR UNDER FOOT. THE PROJECT ENGINEER OR HIS REPRESENTATIVE MUST BE SATISFIED WITH THE LEVEL OF COMPACTION. INADEQUATE COMPACTION CAN LEAD TO EXCESSIVE PIPE DEFLECTIONS AND SETTLEMENT OF THE SOILS OVER THE SYSTEM. BACKFILL SHALL BE PLACED SUCH THAT THERE IS NO MORE THAN A TWO-LIFT DIFFERENTIAL BETWEEN THE SIDES OF ANY PIPE IN THE SYSTEM AT ALL TIMES DURING THE BACKFILL PROCESS. BACKFILL SHALL BE ADVANCED ALONG THE LENGTH OF THE SYSTEM AT THE SAME RATE TO AVOID DIFFERENTIAL LOADING ON ANY PIPES IN THE SYSTEM. 6 INITIAL OPEN GRADED GRANULAR BACKFILL ABOVE PIPE MAY INCLUDE ROAD BASE MATERIAL (AND RIGID PAVEMENT IF APPLICABLE). SEE TABLE ABOVE. 6a TOTAL HEIGHT OF COMPACTED COVER FOR CONVENTIONAL HIGHWAY LOADS IS MEASURED FROM TOP OF PIPE TO BOTTOM OF FLEXIBLE PAVEMENT OR TOP OF RIGID PAVEMENT. 7 FINAL BACKFILL MATERIAL SELECTION AND COMPACTION REQUIREMENTS SHALL FOLLOW THE PROJECT PLANS AND SPECIFICATIONS PER THE ENGINEER OF RECORD. NOTES: · GEOTEXTILE SHOULD BE USED TO PREVENT SOIL MIGRATION INTO VARYING SOIL TYPES (PROJECT ENGINEER). · FOR MULTIPLE BARREL INSTALLATIONS THE RECOMMENDED STANDARD SPACING BETWEEN PARALLEL PIPE RUNS SHALL BE PIPE DIA. / 2 BUT NO LESS THAN 12", OR 36" FOR PIPE DIAMETERS 72" AND LARGER. · CONTACT YOUR CONTECH REPRESENTATIVE FOR NONSTANDARD SPACING (TABLE C12.6.7-1). FINAL BACKFILL GRANULAR BACKFILL DIAMETER (D)IN SITU DIAMETER MIN. COVER CORR. PROFILE 6"-10" 12" 1 1/2" x 1/4" 12"-48" 12" 2 2/3" x 1/2" 54"-96" 12" 3" x 1", 5" x 1" 102"-144" 18" 3" x 1", 5" x 1" LIMITS OF DRAIN ROCK MAY BE PLACED BELOW PIPE AS DEFINED BY ENGINEER OF RECORD. FOUNDATION SPEC STILL APPLIES AND BEDDING WILL BE THE FIRST 4" TO 6" BELOW INVERT 4 TYPICAL BACKFILL DETAIL NOT TO SCALE EMBANKMENT CONDITIONTRENCH CONDITION 6 6a BEDDING FOUNDATIONPIPE EMBEDMENT5a 7 5 3 2 INITIAL FILL ENVELOPE 1 1a 7037 Ridge Road, Hanover, MD 21076 866-740-3318 410-796-5505 866-376-8511 FAX MAK CHECKED: DRAWN: MAK DESIGNED: APPROVED:I:\MERLIN\PROJECT\ACTIVE\631000\631048\631048-10-CMP DETENTION\DRAWINGS\631048-010-CMP CONFAB.DWG 11/13/2019 11:34 AMSHEET NO.: OF P2 DATE:PROJECT No.: 631048 SEQ. No.: 010 PROPOSAL CONTECH DRAWING 84"Ø UNDERGROUND DETENTION SYSTEM - 631048-010 CARMEL ELEMETARY INDIANAPOLIS, IN SITE DESIGNATION: The design and information shown on this drawing is provided as a service to the project owner, engineer and contractor by Contech Engineered Solutions LLC ("Contech"). Neither this drawing, nor any part thereof, may be used, reproduced or modified in any manner without the prior written consent of Contech. Failure to comply is done at the user's own risk and Contech expressly disclaims any liability or responsibility for such use. If discrepancies between the supplied information upon which the drawing is based and actual field conditions are encountered as site work progresses, these discrepancies must be reported to Contech immediately for re-evaluation of the design. Contech accepts no liability for designs based on missing, incomplete or inaccurate information supplied by others. www.ContechES.com 4REVISION DESCRIPTIONDATE MARK BY PIPE Ø2'-6" PIPE Ø 2'-6"PIPE ØFRONT TYPICAL MANWAY DETAIL NOT TO SCALE1'-0" MIN.48"Ø to 90"Ø FITTING REINFORCEMENT MAY BE REQUIRED BASED ON HEIGHT OF COVER AND LIVE LOAD CONDITION PLAN 11/13/19 05/27/20 FLAT GASKET FLAT GASKET HUGGER BAND CONNECTION DETAIL (SBBS) 2 2/3"x1/2" RE-ROLLED END HEL-COR PIPE H-12 HUGGER BAND DETAIL NOT TO SCALE GENERAL NOTES: 1. JOINT IS TO BE ASSEMBLED PER AASHTO BRIDGE CONSTRUCTION SPECIFICATION SEC 26.4.2.4. 2. BAND MATERIALS AND/OR COATING CAN VARY BY LOCATION. CONTACT YOUR CONTECH REPRESENTATIVE FOR AVAILABILITY. 3. BANDS ARE SHAPED TO MATCH THE PIPE-ARCH WHEN APPLICABLE. 4. BANDS ARE NORMALLY FURNISHED AS FOLLOWS: · 12" THRU 48" 1-PIECE · 54" THRU 96" 2-PIECES · 102" THRU 144" 3-PIECES 5. BAND FASTENERS ARE ATTACHED WITH SPOT WELDS, RIVETS OR HAND WELDS. 6. ALL CMP IS REROLLED TO HAVE ANNULAR END CORRUGATIONS OF 2 2/3"x1/2" 7. DIMENSIONS ARE SUBJECT TO MANUFACTURING TOLERANCES. 8. ORDER SHALL DESIGNATE GASKET OPTION, IF REQUIRED (SEE DETAILS ABOVE). SINGLE BAR, BOLT AND STRAP (SBBS) 12 1/8" 10 1/4"12" TECHCO BAND ANGLES 1/2" DIA. BOLT 12" RISER BAND DETAIL NOT TO SCALE PLAIN END CMP RISER PIPE CONNECTION DETAIL 7 1/2" TECHCO SHOWN - MAY VARY STUB HEIGHT2'-0" RECOMMENDED12" MIN.MAINLINE PIPE RISER EXTENSION FLAT BAND SHOWN, MAY VARY (NO GASKET) GENERAL NOTES: 1. DELIVERED BAND STYLE AND FASTENER TYPE MAY VARY BY FABRICATION PLANT. 2. JOINT IS TO BE ASSEMBLED PER AASHTO BRIDGE CONSTRUCTION SPECIFICATION SEC 26.4.2.4. 3. BAND MATERIAL AND GAGE TO BE SAME AS RISER MATERIAL. 4. IF RISER HAS A HEIGHT OF COVER OF 10' OR MORE, USE A SLIP JOINT. 5. BANDS ARE NORMALLY FURNISHED AS FOLLOWS: · 12" THRU 48" 1-PIECE · 54" 2-PIECES 6. ALL RISER JOINT COMPONENTS WILL BE FIELD ASSEMBLED. 7. MANHOLE RISERS IN APPLICATIONS WHERE TRAFFIC LOADS ARE IMPOSED REQUIRE SPECIAL DESIGN CONSIDERATIONS. 8. DIMENSIONS SUBJECT TO MANUFACTURING TOLERANCES. ELEVATION VIEW OF CMP AND RISER 7037 Ridge Road, Hanover, MD 21076 866-740-3318 410-796-5505 866-376-8511 FAX MAK CHECKED: DRAWN: MAK DESIGNED: APPROVED:I:\MERLIN\PROJECT\ACTIVE\631000\631048\631048-10-CMP DETENTION\DRAWINGS\631048-010-CMP CONFAB.DWG 11/13/2019 11:34 AMSHEET NO.: OF P3 DATE:PROJECT No.: 631048 SEQ. No.: 010 PROPOSAL CONTECH DRAWING 84"Ø UNDERGROUND DETENTION SYSTEM - 631048-010 CARMEL ELEMETARY INDIANAPOLIS, IN SITE DESIGNATION: The design and information shown on this drawing is provided as a service to the project owner, engineer and contractor by Contech Engineered Solutions LLC ("Contech"). Neither this drawing, nor any part thereof, may be used, reproduced or modified in any manner without the prior written consent of Contech. Failure to comply is done at the user's own risk and Contech expressly disclaims any liability or responsibility for such use. If discrepancies between the supplied information upon which the drawing is based and actual field conditions are encountered as site work progresses, these discrepancies must be reported to Contech immediately for re-evaluation of the design. Contech accepts no liability for designs based on missing, incomplete or inaccurate information supplied by others. www.ContechES.com 4REVISION DESCRIPTIONDATE MARK BY 11/13/19 05/27/20 MANHOLE CAP DETAIL NOT TO SCALE8"11" TYP.2" COVERTYP.1" GAP (TYP. ALLSIDES)NOTES: 1. DESIGN IN ACCORDANCE WITH AASHTO, 17th EDITION AND ACI 350. 2. DESIGN LOAD HS25. 3. EARTH COVER = 1' MAX. 4. CONCRETE STRENGTH = 4,000 psi 5. REINFORCING STEEL = ASTM A615, GRADE 60. 6. PROVIDE ADDITIONAL REINFORCING AROUND OPENINGS EQUAL TO THE BARS INTERRUPTED, HALF EACH SIDE. ADDITIONAL BARS TO BE IN THE SAME PLANE. A A2" COVER (TYP) SECTION VIEW ROUND OPTION PLAN VIEW SQUARE OPTION PLAN VIEW Ø CMP RISER INTERRUPTED BAR REPLACEMENT, SEE NOTE 6. STANDARD REINFORCING, SEE TABLE OPENING IN PROTECTION SLAB FOR ACESS #4 DIAGONAL TRIM BAR (TYP. 4 PLACES), SEE NOTE 7. A INTERRUPTED BAR REPLACEMENT, SEE NOTE 6. B OPENING IN PROTECTION SLAB FOR ACCESS #4 DIAGONAL TRIM BAR (TYP. 4 PLACES), SEE NOTE 7. STANDARD REINFORCING, SEE TABLE GASKET MATERIAL SUFFICIENT TO PREVENT SLAB FROM BEARING ON RISER TO BE PROVIDED BY CONTRACTOR. 2 " COVER(TYP. ) ØB REINFORCING TABLE Ø CMP RISER A B Ø REINFORCING **BEARING PRESSURE (PSF) 24"4'Ø 4'x4'26"#5 @ 10" OCEW #5 @ 10" OCEW 2,540 1,900 30"4'-6"Ø 4'-6" x 4'-6"32"#5 @ 10" OCEW #5 @ 9" OCEW 2,260 1,670 36"5'Ø 5' x 5'38"#5 @ 9" OCEW #5 @ 8" OCEW 2,060 1,500 42"5'-6"Ø 5'-6" x 5'-6"44"#5 @ 8" OCEW #5 @ 8" OCEW 1,490 1,370 48"6'Ø 6' x 6'50"#5 @ 7" OCEW #5 @ 7" OCEW 1,210 1,270 ** ASSUMED SOIL BEARING CAPACITY1'-0"A 2" COV E R (TYP.)2" C O V E R (T YP )7. TRIM OPENING WITH DIAGONAL #4 BARS, EXTEND BARS A MINIMUM OF 12" BEYOND OPENING, BEND BARS AS REQUIRED TO MAINTAIN BAR COVER. 8. PROTECTION SLAB AND ALL MATERIALS TO BE PROVIDED AND INSTALLED BY CONTRACTOR. 9. DETAIL DESIGN BY DELTA ENGINEERS, ARCHITECTS AND LAND SURVEYORS, ENDWELL, NY. ØB 36"Ø MAX., HS-25 ACCESS CASTING WITH GRADE RINGS AS REQUIRED, TO BE PROVIDED AND INSTALLED BY CONTRACTOR. MAY BE TOP MOUNTED (AS SHOWN) OR RECESSED.CMP PROTECTION SLAB VARIES RIM/FINISHED GRADE ACCESS CASTING NOT SUPPLIED BY CONTECH 7037 Ridge Road, Hanover, MD 21076 866-740-3318 410-796-5505 866-376-8511 FAX MAK CHECKED: DRAWN: MAK DESIGNED: APPROVED:I:\MERLIN\PROJECT\ACTIVE\631000\631048\631048-10-CMP DETENTION\DRAWINGS\631048-010-CMP CONFAB.DWG 11/13/2019 11:34 AMSHEET NO.: OF P4 DATE:PROJECT No.: 631048 SEQ. No.: 010 PROPOSAL CONTECH DRAWING 84"Ø UNDERGROUND DETENTION SYSTEM - 631048-010 CARMEL ELEMETARY INDIANAPOLIS, IN SITE DESIGNATION: The design and information shown on this drawing is provided as a service to the project owner, engineer and contractor by Contech Engineered Solutions LLC ("Contech"). Neither this drawing, nor any part thereof, may be used, reproduced or modified in any manner without the prior written consent of Contech. Failure to comply is done at the user's own risk and Contech expressly disclaims any liability or responsibility for such use. If discrepancies between the supplied information upon which the drawing is based and actual field conditions are encountered as site work progresses, these discrepancies must be reported to Contech immediately for re-evaluation of the design. Contech accepts no liability for designs based on missing, incomplete or inaccurate information supplied by others. www.ContechES.com CONSTRUCTION LOADS FOR TEMPORARY CONSTRUCTION VEHICLE LOADS, AN EXTRA AMOUNT OF COMPACTED COVER MAY BE REQUIRED OVER THE TOP OF THE PIPE. THE HEIGHT-OF-COVER SHALL MEET THE MINIMUM REQUIREMENTS SHOWN IN THE TABLE BELOW. THE USE OF HEAVY CONSTRUCTION EQUIPMENT NECESSITATES GREATER PROTECTION FOR THE PIPE THAN FINISHED GRADE COVER MINIMUMS FOR NORMAL HIGHWAY TRAFFIC. PIPE SPAN, INCHES 18-50 MINIMUM COVER (FT) AXLE LOADS (kips) 50-75 75-110 110-150 12-42 2.0 2.5 3.0 3.0 4.03.5 3.0 48-72 3.0 3.078-120 3.5 4.0 4.0 4.54.5 4.0 126-144 3.5 *MINIMUM COVER MAY VARY, DEPENDING ON LOCAL CONDITIONS. THE CONTRACTOR MUST PROVIDE THE ADDITIONAL COVER REQUIRED TO AVOID DAMAGE TO THE PIPE. MINIMUM COVER IS MEASURED FROM THE TOP OF THE PIPE TO THE TOP OF THE MAINTAINED CONSTRUCTION ROADWAY SURFACE. HEIGHT OF COVER TEMPORARY COVER FOR CONSTRUCTION LOADS FINISHED GRADE CONSTRUCTION LOADING DIAGRAM NOT TO SCALE SCOPE THIS SPECIFICATION COVERS THE MANUFACTURE AND INSTALLATION OF THE CORRUGATED STEEL PIPE (CSP) DETAILED IN THE PROJECT PLANS. MATERIAL THE ALUMINIZED TYPE 2 STEEL COILS SHALL CONFORM TO THE APPLICABLE REQUIREMENTS OF AASHTO M274 OR ASTM A929. PIPE THE CSP SHALL BE MANUFACTURED IN ACCORDANCE WITH THE APPLICABLE REQUIREMENTS OF AASHTO M36 OR ASTM A760. THE PIPE SIZES, GAGES AND CORRUGATIONS SHALL BE AS SHOWN ON THE PROJECT PLANS. ALL FABRICATION OF THE PRODUCT SHALL OCCUR WITHIN THE UNITED STATES. HANDLING AND ASSEMBLY SHALL BE IN ACCORDANCE WITH RECOMMENDATIONS OF THE NATIONAL CORRUGATED STEEL PIPE ASSOCIATION (NCSPA) INSTALLATION SHALL BE IN ACCORDANCE WITH AASHTO STANDARD SPECIFICATIONS FOR HIGHWAY BRIDGES, SECTION 26, DIVISION II OR ASTM A798 AND IN CONFORMANCE WITH THE PROJECT PLANS AND SPECIFICATIONS. IF THERE ARE ANY INCONSISTENCIES OR CONFLICTS THE CONTRACTOR SHOULD DISCUSS AND RESOLVE WITH THE SITE ENGINEER. IT IS ALWAYS THE RESPONSIBILITY OF THE CONTRACTOR TO FOLLOW OSHA GUIDELINES FOR SAFE PRACTICES. SPECIFICATION FOR CORRUGATED STEEL PIPE-ALUMINIZED TYPE 2 STEEL MATERIAL SPECIFICATION NOT TO SCALE 4REVISION DESCRIPTIONDATE MARK BY 11/13/19 05/27/20