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HomeMy WebLinkAbout33-4923-Storm-Drainage-Retention-Structures_Rev_1Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, project #71011 33 4923 Storm Drainage Retention Structures 1 of 5 33 4923 Storm Drainage Retention Structures PART 1 GENERAL 1.1 GENERAL PROVISIONS A. Attention is directed to the CONTRACT AND GENERAL CONDITIONS and all Sections within DIVISION 01 - GENERAL REQUIREMENTS which are hereby made a part of this Section of the Specifications. B. The General Contractor shall either perform the work of this section with its own forces or shall subcontract such work to a subcontractor who will furnish a performance and payment bond for the complete scope of work and listing the Owner as the co-oblige. Such bond shall be procured from a surety that is currently licensed to do business in Massachusetts and is currently listed on the United States Treasure Department circular 570. A copy of such bond shall be submitted to the Owner’s Project Manager for approval and shall be in place prior to the subcontractor commencing any work on the project. 1.2 SCOPE OF WORK A. Furnish all labor, materials, equipment, and incidentals required to install high density polyethylene groundwater recharge chambers, fittings, manifolds, and appurtenances as indicated and as specified herein. 1.3 RELATED WORK A. Section 31 0000, EARTHWORK B. Section 33 0513, MANHOLES AND STRUCTURES C. Section 33 4100, STORM UTILITY DRAINAGE PIPING. D. Provision of waste management: Section 01 7419, Construction of Waste Management Plan. E. Provision of General LEED requirements and forms: 01 8113 Sustainable Design Requirements. 1.4 SUBMITTALS A. Submit the name of the recharge unit and fitting suppliers and Shop Drawings, showing layout details of reinforcement, joint, method of manufacture, and installation of recharge units, specials, and fittings for the entire job. B. Prior to each shipment of recharge units submit certified test reports and a notarized affidavit stating that all recharge units meet requirements of ASTM D1238 & ASTM D1505. 1.5 REFERENCED STANDARDS A. American Society for Testing and Materials (ASTM) 1. ASTM D1238 – Standard Test Method for Flow Rates of Thermoplastics by Extrusion Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, project #71011 33 4923 Storm Drainage Retention Structures 2 of 5 Plastometer. 2. ASTM D1248 - Standard Specification for Polyethylene Plastics Molding and Extrusion Materials. 3. ASTM D1505 - Standard Test Method for Density of Plastics by the Density-Gradient Technique. 4. ASTM D2657 - Standard Practice for Heat Fusion Joining of Polyolefin Recharge units and Fittings. 5. ASTM D2837 - Standard Test Method for Obtaining Hydrostatic Design Basis for Thermoplastic Recharge units Materials. 6. ASTM D3350 - Standard Specification for Polyethylene Plastic Recharge units and Fittings Materials 7. ASTM F714 - Standard Specification for Polyethylene (PE) Plastic Recharge units and (SDR-PR) Based on Outside Diameter. B. Where reference is made to one of the above standards, the revision in effect at the time of the bid opening shall apply. PART 2 PRODUCTS 2.1 HIGH DENSITY POLYETHYLENE RECHARGE UNITS A. High Density Polyethylene (HDPE) recharge unit resins shall be high molecular weight, high density polyethylene with a cell classification number of 345434C in accordance with ASTM D3350. B. All polyethylene recharge units shall meet the requirements of ASTM F714. C. The recharge units shall be jointed with, butt head fusion joints. All joints shall be made in strict compliance with the manufacture’s recommendations. D. Recharge units shall be furnished in standard laying lengths not exceeding 25 ft. E. All high-density polyethylene recharge units and fittings shall be made from the same resin. 2.2 RECHARGE UNITS IDENTIFICATION A. The following shall be continuously indent printed on the recharge units. 1. Name and/or trademark of the recharge unit manufacturer. 2. Nominal size. 3. Dimension ratio. 4. The letters PE followed by the polyethylene grade in accordance with ASTM D1248, followed by the hydrostatic design basis in 100’s of psi, e.g., PE 3408. 5. Manufacturing standard reference, e.g., ASTM F714. 6. A production code from which the date and place of manufacture can be determined. 2.3 CHAMBER PARAMETERS Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, project #71011 33 4923 Storm Drainage Retention Structures 3 of 5 A. The chamber will be vacuum thermoformed of high molecular weight high density polyethylene (HMWHDPE). B. The chamber will be arched in shape. C. The chamber will be open-bottomed. D. The chamber will be joined using an interlocking overlapping rib method. Connections must be fully shouldered overlapping ribs, having no separate couplings or separate end walls. E. The nominal chamber dimensions of the recharge units shall be capable of storing the required volume for recharge in the area at the depths noted on the plans. F. The chambers shall be fitted with either an external or an internal manifold to evenly distribute the stormwater. If internal manifolds are used the chambers will have two side portals to accept feed connectors for the internal manifold. G. The nominal dimensions of each internal manifold side portal will be manufacturer's specifications. H. The nominal chamber dimensions of an external manifold will be per manufacturer's recommendations. I. The chambers will have discharge holes bored into the sidewalls of the unit’s core to promote lateral conveyance of water. J. The endwall of the chamber, when present, will be an integral part of the continuously formed unit. K. The starter unit must be formed as a whole chamber having one fully formed integral endwall and one partially formed integral endwall. L. The intermediate unit must be formed as a whole chamber having one fully open endwall and one partially formed integral endwall. M. The end unit must be formed as a whole chamber having one fully formed integral endwall and one fully open end wall and having no separate end plates or end walls. N. Internal manifold feed connectors must be formed as a whole chamber having two open end walls and having no separate end plates or separate end walls. The unit will fit into the side portals of the chamber and act as cross feed connections. O. Chambers must have horizontal stiffening flex reduction steps between the ribs. P. The chamber will be designed to withstand AASHTO H-25 load rating when installed according to manufacturer’s recommended installation instructions. Q. Heavy duty units are designated by a colored stripe formed into the part along the length of the chamber. R. The chamber will have a raised integral cap at the top of the arch in the center of each unit to be used as an optional inspection port or clean out. Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, project #71011 33 4923 Storm Drainage Retention Structures 4 of 5 S. The units may be trimmed to custom lengths by cutting back to any corrugation on the large rib end. T. PART 3 EXECUTION 3.1 GENERAL A. High Density Polyethylene (HDPE) recharge units hall be installed in accordance with the instruction of the manufacturer, as indicated and as specified herein. B. Recharge units shall be laid to lines and grade as indicated with bedding and backfill as indicated. C. When laying is not in progress, the open ends of the recharge units shall be closed by fabricated plugs, or by other approved means. All plugs shall be OD fitting type plugs. No plugs will be allowed that require insertion of the plug into the recharge units. F. Recharge units shall be stored on clean level ground to prevent scratching or gouging. The handling of the recharge units shall be in such a manner that the recharge units is not damaged by dragging it over sharp and cutting objects. The maximum allowable depth of cuts, scratches, or gouges on the exterior of the recharge units is 10 percent of the wall thickness. The interior of the recharge unit surfaces shall be free of cuts, gouges, or scratches. E. Sections of recharge units with cuts, scratches, or gouges deeper than allowed shall be removed completely and replaced and the ends of the recharge units rejoined at no additional cost. F. Single recharge units systems shall be jointed by the method of thermal butt fusion, as outlined in ASTM D2657. All joints shall be made in strict compliance with the manufacturer’s recommendations. G. All HDPE recharge units must be at the temperature of the surrounding soil at the time of backfilling and compaction. 3.2 INSTALLATION A. Installing contractors are expected to comprehend and use the most current installation instructions prior to beginning a system installation. B. Contact manufacturer at least thirty days prior to system installation to arrange for a pre- construction meeting. C. All system designs must be certified by a registered professional engineer licensed in the Commonwealth of Massachusetts. D. Use these installation instructions as a guideline only. Actual design may vary. Refer to approved construction drawings for job-specific details. Be sure to follow the engineer’s drawings as your primary guide. E. System cover/backfill requirements will vary based on chamber model. Please refer to Engineer’s drawings. Dennis Yarmouth Intermediate Middle School January 19, 2021 Dennis Yarmouth Regional School District 100% Construction Documents Perkins Eastman DPC, project #71011 33 4923 Storm Drainage Retention Structures 5 of 5 F. Any discrepancies with the system sub-grade soil’s bearing capacity must be reported to the Engineer. G. Filter fabric must be used as specified in the Contract drawings. H. Manufacturer requires the contractor to refer to the manufacturer’s installation instructions, concerning vehicular traffic. Responsibility for preventing vehicles that exceed the manufacturer’s requirements from traveling across or parking over the chamber system lies solely with the contractor throughout the entire site construction process. I. The placement of warning tape, temporary fencing, and/or appropriately located signs is required. Acceptable vehicle loading criteria is HS-20 loading. J. UNDERGROUND PIPE MARKERS Manufacturers: 1. Any manufacturers of such products shall be considered. 2. Substitutions: Refer to Section 01 60 00 - Product Requirements. 3. Plastic Ribbon Tape: Bright colored, imprinted with "STORM” in large letters, minimum 6 in. wide by 4 mil. thick, manufactured for direct burial service. 4. Trace Wire: Magnetic detectable conductor, brightly colored plastic covering, imprinted with "STORM” in large letters. K. Erosion and sediment-control measures must meet state and local codes and the design engineer’s specifications throughout the entire site construction process. L. Underground recharge systems must be designed and installed in accordance with the manufacturer's minimum requirements. 3.3 CLEANING A. Prior to Final Completion of the Work, thoroughly clean all the new recharge units and remove all dirt, stones, and pieces of wood or other materials. END SECTION (THIS PAGE IS BLANK)