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HomeMy WebLinkAboutConstruction Control Specifications - - 430 OSGOOD STREET ENCLOSURE 2 Specification Sections North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 SECTION 312319 - DEWATERI NG PART 1 —GENERAL 1.1 GENERAL PROVISIONS A. Attention is directed to the CONTRACT AND GENERAL CONDITIONS and all Sections within DIVISION 00— PROCUREMENT AND CONTRACTING REQUIREMENTS (PCR) which are hereby made a part of this Section of the Specifications. 1.2 DESCRIPTION OF WORK A. Work Included: Provide labor, materials and equipment necessary to complete the work of this Section, including but not limited to the following: 1. Construction dewatering. B. Alternates: N/A C. Items To Be Installed Only: Not Applicable. D. Items To Be Furnished Only: Not Applicable. E. Related Work: The following items are not included in this Section and will be performed under the designated Sections: 1. Section 31 2000 - EARTH MOVING for excavating, backfilling, site grading, and for site utilities. 1.3 PERFORMANCE REQUIREMENTS A. Dewatering Performance: Design, furnish, install, test, operate, monitor, and maintain dewatering system of sufficient scope, size, and capacity to control hydrostatic pressures and to lower, control, remove, and dispose of ground water and permit excavation and construction to proceed on dry, stable subgrades. B. Delegated Design: Design dewatering system, including comprehensive engineering analysis by a qualified professional engineer, using performance requirements and design criteria indicated. 1. Test liquids for hazardous waste at start of construction operations and provide on-site remediation as acceptable to authorities having jurisdiction. DEWATERI NG 312319-1 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 2. Continuously monitor and maintain dewatering operations to ensure erosion control, stability of excavations and constructed slopes, that excavation does not flood, and that damage to subgrades and permanent structures is prevented. 3. Prevent surface water from entering excavations by grading, dikes, or other means. 4. Accomplish dewatering without damaging existing buildings, structures, and site improvements adjacent to excavation. 5. Remove dewatering system when no longer required for construction. 1.4 SUBMITTALS A. Shop Drawings: For dewatering system. Show arrangement, locations, and details of wells and well points; locations of risers, headers, filters, pumps, power units, and discharge lines; and means of discharge, control of sediment, and disposal of water. 1. Include layouts of piezometers and flow-measuring devices for monitoring performance of dewatering system. 2. Include a written plan for dewatering operations including control procedures to be adopted if dewatering problems arise. B. Delegated-Design Submittal: For dewatering system indicated to comply with performance requirements and design criteria, including analysis data signed and sealed by the qualified professional engineer responsible for their preparation. C. Qualification Data: For qualified Installer D. Field quality-control reports. E. Other Informational Submittals: 1. Photographs: Show existing conditions of adjoining construction and site improvements that might be misconstrued as damage caused by dewatering operations. 1.5 QUALITY ASSURANCE A. Installer Qualifications: An experienced installer that has specialized in dewatering work. B. Regulatory Requirements: Comply with governing EPA notification regulations before beginning dewatering. Comply with hauling and disposal regulations of authorities having jurisdiction. C. Preinstallation Conference: Conduct conference at Project site to comply with DEWATERI NG 312319-2 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 requirements in Division 01. 1. Review methods and procedures related to dewatering including, but not limited to, the following: a. Inspection and discussion of condition of site to be dewatered including coordination with temporary erosion control measures and temporary controls and protections. b. Geotechnical report. C. Proposed site clearing and excavations. d. Existing utilities and subsurface conditions. e. Coordination for interruption, shutoff, capping, and continuation of utility services. f. Construction schedule. Verify availability of Installer's personnel, equipment, and facilities needed to make progress and avoid delays. g. Testing and monitoring of dewatering system. 1.6 PROJECT CONDITIONS A. Interruption of Existing Utilities: Do not interrupt any utility serving facilities occupied by Owner or others unless permitted under the following conditions and then only after arranging to provide temporary utility according to requirements indicated: 1. Notify Engineer no fewer than two days in advance of proposed interruption of utility. 2. Do not proceed with interruption of utility without Engineer's written permission. B. Project-Site Information: A geotechnical report has been prepared for this Project and is available for information only. The opinions expressed in this report are those of geotechnical engineer and represent interpretations of subsoil conditions, tests, and results of analyses conducted by geotechnical engineer. Owner will not be responsible for interpretations or conclusions drawn from this data. 1. Make additional test borings and conduct other exploratory operations necessary for dewatering. 2. The geotechnical report is referenced elsewhere in the Project Manual. C. Survey Work: Engage a qualified land surveyor or professional engineer to survey adjacent existing buildings, structures, and site improvements, establishing exact elevations at fixed points to act as benchmarks. Clearly identify benchmarks and record existing elevations. 1. During dewatering, regularly resurvey benchmarks, maintaining an accurate log of surveyed elevations for comparison with original elevations. Promptly notify Architect DEWATERI NG 312319-3 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 if changes in elevations occur or if cracks, sags, or other damage is evident in adjacent construction. PART 2 - PRODUCTS (Not Used) PART 3 — EXECUTION 3.1 PREPARATION A. Protect structures, utilities, sidewalks, pavements, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by dewatering operations. 1. Prevent surface water and subsurface or ground water from entering excavations, from ponding on prepared subgrades, and from flooding site and surrounding area. 2. Protect subgrades and foundation soils from softening and damage by rain or water accumulation. B. Install dewatering system to ensure minimum interference with roads, streets, walks, and other adjacent occupied and used facilities. 1. Do not close or obstruct streets, walks, or other adjacent occupied or used facilities without permission from Owner and authorities having jurisdiction. Provide alternate routes around closed or obstructed traffic ways if required by authorities having jurisdiction. C. Provide temporary grading to facilitate dewatering and control of surface water. D. Monitor dewatering systems continuously. E. Promptly repair damages to adjacent facilities caused by dewatering. F. Protect and maintain temporary erosion and sedimentation controls, which are specified in Section 31 2500 - EROSION AND SEDIMENTATION CONTROLS during dewatering operations. 3.2 INSTALLATION A. Install dewatering system utilizing wells, well points, or similar methods complete with pump equipment, standby power and pumps, filter material gradation, valves, appurtenances, water disposal, and surface-water controls. DEWATERI NG 312319-4 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 1. Space well points or wells at intervals required to provide sufficient dewatering. 2. Use filters or other means to prevent pumping of fine sands or silts from the subsurface. B. Before excavating below ground-water level, place system into operation to lower water to specified levels. Operate system continuously until drains, sewers, and structures have been constructed and fill materials have been placed or until dewatering is no longer required. C. Provide an adequate system to lower and control ground water to permit excavation, construction of structures, and placement of fill materials on dry subgrades. Install sufficient dewatering equipment to drain water-bearing strata above and below bottom of foundations, drains, sewers, and other excavations. 1. Do not permit open-sump pumping that leads to loss of fines, soil piping, subgrade softening, and slope instability. D. Reduce hydrostatic head in water-bearing strata below subgrade elevations of foundations, drains, sewers, and other excavations. 1. Maintain piezometric water level a minimum of 24 inches below surface of excavation. E. Dispose of water removed by dewatering in a manner that avoids endangering public health, property, and portions of work under construction or completed. Dispose of water and sediment in a manner that avoids inconvenience to others. Provide sumps, sedimentation tanks, and other flow-control devices as required by authorities having jurisdiction. F. Provide standby equipment on site, installed and available for immediate operation, to maintain dewatering on continuous basis if any part of system becomes inadequate or fails. If dewatering requirements are not satisfied due to inadequacy or failure of dewatering system, restore damaged structures and foundation soils at no additional expense to Owner. 1. Remove dewatering system from Project site on completion of dewatering. Plug or fill well holes with sand or cut off and cap wells a minimum of 36 inches below overlying construction. G. Damages: Promptly repair damages to adjacent facilities caused by dewatering operations. 3.3 FIELD QUALITY CONTROL A. Observation Wells: Provide, take measurements, and maintain at least the minimum number of observation wells or piezometers indicated; additional observation wells may be required by authorities having jurisdiction. DEWATERI NG 312319-5 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 B. Observe and record daily elevation of ground water and piezometric water levels in observation wells. 1. Repair or replace, within 24 hours, observation wells that become inactive, damaged, or destroyed. In areas where observation wells are not functioning properly, suspend construction activities until reliable observations can be made. Add or remove water from observation-well risers to demonstrate that observation wells are functioning properly. 2. Fill observation wells, remove piezometers, and fill holes when dewatering is completed. C. Provide continual observation to ensure that subsurface soils are not being removed by the dewatering operation. END OF SECTION G:\719560\02 Design\specs\Division 31 -Earthwork\31 23 19-Dewatering.dou DEWATERI NG 312319-6 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 SECTION 321823 SYNTHETIC FIELD SURFACING PART 1 —GENERAL 1.1 GENERAL PROVISIONS A. Attention is directed to the CONTRACT AND GENERAL CONDITIONS and all Sections within DIVISION 00— PROCUREMENT AND CONTRACTING REQUIREMENTS (PCR) which are hereby made a part of this Section of the Specifications. 1.2 GENERAL REQUIREMENTS A. It is the intent of this specification to specify an Infilled Synthetic Turf System that provides a high-quality playing surface for multi-purpose athletic uses installed by experienced crews under the direct supervision of an experienced foreman/superintendent. The finished surfaces shall be immediately firm, and stable while providing long term durability, safety, and shock attenuation. The Infilled Synthetic Turf System Supplier/Installer's attention is called to the testing requirements related to G-Max rating per ASTM F355-01, current edition.As a result, the following minimum requirements must be met by all turf systems to be favorably considered: 1. The synthetic turf shall be manufactured and supplied by a company which has been in business continuously for a period of a minimum of five (5) years under the same name and ownership and with at least five (5) years' experience in the manufacture and supply and of the type of materials specified herein on projects of comparable size to this Project. 2. The synthetic turf manufacturer must have completed a minimum of twenty-five (25) synthetic turf installations in the last 5 years, each in excess of 75,000 square feet. 3. Turf Installation Crew: Synthetic turf installation crew shall have installed a minimum of ten (10) outdoor athletic field systems of similar type measuring 75,000 square feet or greater. The Turf Installation Crew shall contain at least three (3) members who have installed at least five (5)similar outdoor turf installations each greater than 75,000 square feet. The designated crew foreman shall have installed at least ten (10) similar outdoor turf installations greater than 75,000 square feet and shall be subject to the approval of the Engineer. The crew foreman shall be on site during all turf installation procedures and shall not be replaced without Owner approval. Installation crew and foreman shall submit a list of previously installed projects, by type, size, and location for the Owner's representative inspection at the pre-construction conference and prior to start of Work. 4. The General Contractor shall submit a list of previously installed projects, to include individual owner contact information, by the proposed Synthetic Turf Supplier/Installer, along with crew and foreman qualifications at the pre-construction conference that demonstrates compliance with the minimum requirements of this Section, 1.2, Paragraphs 1-3. SYNTHETIC FIELD SURFACING 321823 - 1 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 5. The General Contractor must coordinate all work items with the Turf Supplier/Installer. 1.3 DESCRIPTION OF WORK A. Provide labor equipment and materials, to construct a permeable gravel base with an infilled synthetic turf field surfacing, including all tufted and/or inlaid sports field linings and markings as indicated on the Drawings. Regardless of the final turf system to be installed, the Turf Supplier/Installer will meet or exceed the requirements of this specification related to materials, performance, and qualifications. Work shall include but shall not be limited to: 1. Provide an inspection and certification of subsurface drainage system and Free Draining Base prior to commencement of subsequent work. 2. Furnish and install an Infilled Synthetic Turf System including free draining base, a dual fiber carpet of polyethylene parallel long-slit and monofilament polyethylene fibers with nominal height of 2.25" tufted into a high-quality polyurethane coated backing, and sand and rubber infill mix. 3. Provide infiltration testing by means of Dual-Ring Infiltrometer at a minimum of six (6) locations for every 80,000 square feet of field area after completion of Free Draining Finishing Stone layer. 4. Provided tufted, inlaid and painted lines and markings or other such graphics as described herein and shown on the Contract Drawings and approved Shop Drawings. 5. Provide all attachments and penetrations as required to complete the work as shown on the Contract Drawings and approved Shop Drawings, all in full compliance with N FHS and M IAA rules for the intended sports. 6. Provide eight (8) year warranty and one (1) field maintenance training session prior to final closeout as further described within this section. 7. Provide Third Party Insured Warranty as further described within this section. 1.4 RELATED SECTIONS A. Examine Contract Documents for requirements that affect work of this Section. Other Specification Sections that directly relate to work of this Section include, but are not limited to: 1. Section 31 20 00 — Earth Moving 2. Section 33 41 00 — Storm Utility Drainage System 3. Section 03 30 00 — Cast-in-Place Concrete SYNTHETIC FIELD SURFACING 321823 - 2 North Andover High School Athletic Field Improvements North Andover, MA Gale JN 719560 1.5 REFERENCES A. Comply with applicable requirements of the following standards. Where these standards conflict with other specified requirements, the most restrictive requirement shall govern. 1. American Society for Testing and Materials (ASTM): D 1557 Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-Ibf/cu.ft (2,700 KN-m/cu.m.)) F 355 Shock Absorbing Properties of Playing Surface Systems and Materials. D 5034 Grab Breaking Strength D 418 Pile Height, Tuft Spacing, Face Weight and Total Weight D 2859 Flammability (Pill test) F 1551 Shoe Traction F 1551 Water Permeability F 1015 Abrasive Index 1.6 SUBMITTALS A. Manufacturer's Literature 1. Submit a signed statement from the Infilled Synthetic Turf System Manufacturer that the Drawings and Specifications have been reviewed by a qualified representative of the Infilled Synthetic Turf System Manufacturer and major materials suppliers, and that they are in agreement that the materials and installation methods to be used for the Infilled Synthetic Turf System are proper and adequate for use as amulti-purpose athletic field in New England. 2. Submit a recent reference list for the turf system manufacturer/supplier of at least twenty-five (25) outdoor installations of a tufted polyethylene infilled synthetic turf system, each in excess of 75,000 square feet. 3. Submit a recent reference list for the turf system installation crew of at least ten (10) outdoor installations of a tufted polyethylene infilled synthetic turf system, each in excess of 75,000 square feet. 4. Job resumes of Infilled Synthetic Turf System Manufacturer's Installation Foreman (showing supervision of at least ten (10) similar infilled turf installations) and Infilled Synthetic Turf System Installers. 5. Cut Sheets for all materials required under this Section (turf, fiber, sand, infill system, etc.) including third party ASTM certified lab gradation reports. 6. Provide a sample written 8-year labor and materials warranty from the Infilled Synthetic Turf System Manufacturer. 7. Provide a sample Written Third Party Insured Warranty (described herein) at the pre- construction conference. 8. A signed letter on turf manufacturer company letterhead holding the Owner, Designer and all other project consultants harmless for any violation of patent rights or SYNTHETIC FIELD SURFACING 321823 - 3 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 infringements and claims related to hazardous materials (e.g. lead, zinc PFAS) or other environmental impacts. B. Shop Drawings 1. Provide a carpet seaming plan. 2. Supply shop drawings (including details) at an approved scale for location, installation, and erection of the synthetic turf anchoring system 3. Provide a striping and marking plan for all intended sports in compliance with NFHS and MIAA and the Drawings for approval by the Owner and Designer. C. Product Samples and Information 1. Provide color samples of manufacturer's standard slit film and monofilament polyethylene fibers for approval. 2. Provide a minimum of 12" x 12" sample of the slit film and monofilament dual-fiber polyethylene carpet. Provide additional carpet samples for other colors required under this Section. 3. Provide 12" long sample of seaming tape. 4. Provide certified sieve analysis of sand and rubber infill materials for approval. 5. Provide a 1-quart sample of the infill mix at the Designer's approved mix ratio. D. Delivery slips for all aggregate base and Infilled Synthetic Turf System materials delivered to the site. E. Provide three (3) copies of the synthetic turf manufacturer's Maintenance Manual to the Owner. The synthetic turf manufacturer shall also provide the necessary instructions and training for proper care and preventative maintenance of the synthetic turf system. F. Substrate Acceptability: Submit a certified statement issued by the synthetic field surfacing materials Supplier/Installer, attesting that all areas and surfaces designated to receive synthetic field surfacing have been inspected and found satisfactory for the reception of the Work covered under this Section; and are not in conflict with the "Guarantee" requirements. Installation of synthetic field surfacing materials may not commence until final acceptance of finished crushed stone/aggregate base has been received by the Engineer. G. Statement of Supervision: Upon completion of the Work, submit a written statement signed by the Synthetic Turf Supplier/Installer stating that the field supervision of the manufacturer's representative was sufficient to insure proper application of the materials, that the Work was installed in accordance with the Contract Documents, and that the installation is acceptable to the manufacturer. H. Synthetic Turf Supplier shall provide a written statement that their product is lead free prior to installation. SYNTHETIC FIELD SURFACING 321823 - 4 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 1.7 QUALITY ASSURANCE A. Inspection and Acceptance: The Infilled Synthetic Turf System Supplier/Installer and General Contractor shall inspect the subgrade and drainage system to verify their acceptance of installation and condition in writing, per Section 1.06 (G). The turf manufacturer/supplier shall include in their cost sufficient site visits during subbase and base construction, along with any testing they require to determine the adequacy of the drainage and base construction. Commencement of subsequent installation in a given work area indicates acceptance of underlying substrates and systems. Testing of drainage capacity shall be by Dual Ring Infiltrometer at a minimum of six (6) locations per 80,000 square feet of each field area after completion of free draining finishing stone. The Owner's testing and inspection consultant shall be present for these testing operations. B. Planarity and Grade: Deviation in planarity of the Free Draining Finish Stone layer and finished surface shall not exceed 1/4" beneath a 10' straightedge. Deviation from a straight grade between levels on drawings shall not exceed 1/4". Final grading shall be performed with a dual laser-controlled finish grader. C. Protection: Only low ground pressure equipment shall be allowed on the subbase or base surfaces of the field. Heavy equipment, dual articulating vehicles, lulls, or vehicles of any kind without flotation tires shall not be allowed on the field area subsequent to the completion of the drainage system. 1.8 DELIVERY, STORAGE AND HANDLING A. Deliver materials in original, unopened packages with manufacturer's labels intact and clearly identifying products. B. Store materials elevated above grade and under cover; keep them dry and protected from weather, direct sunlight surface contamination, construction traffic and other causes. C. Comply with procedures recommended by the manufacturer. 1.9 TESTING AND INSPECTION A. The General Contractor shall engage a material testing agency. The testing agency will observe the aggregate placement, concrete placement, drainage product installation, backfill, compaction and moisture and permeability tests. Weekly testing results shall be provided to the Owner for review. Submission of testing results will be a requirement for the processing of partial payment requests. B. The General Contractor shall engage a certified third-party testing agency qualified to conduct field infiltration tests of the in-place base and subbase materials per ASTM D3385, Standard Test Method for Infiltration Rate of Soils in Field using a Dual-Ring Infiltrometer or an equivalent percolation test to affirm the subsurface drainage system's water permeability rates prior to carpet installation. C. In addition to the required Dual-Ring Infiltrometer testing, the General Contractor shall verify that the subsurface drainage system is functioning properly prior to the commencement of the infilled synthetic turf system installation by thoroughly flooding each field in a minimum of six(6) areas and verifying and recording flow from the drainage SYNTHETIC FIELD SURFACING 321823 - 5 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 system outlet. This can also be accomplished by recording a naturally occurring rain event with greater than 1/2" of rainfall. D. G-Max: 1. Performed upon completion of synthetic turf carpet, infill and resilient pad. 2. The General Contractor shall provide the necessary testing data to the Owner, verifying that the finished field meets the required shock attenuation (GMax), as per ASTM F355/F1936: Immediately upon substantial completion, the General Contractor shall arrange for shock absorbency testing by a certified laboratory subject to approval by the Designer in accordance with ASTM F 335-Method. Testing will be performed at a minimum of ten locations selected by the Designer. "In-house" laboratories with a business affiliation to the turf manufacturer and/or installer are unacceptable. 3. The average G-max value at installation shall be between 100 and 130. The Synthetic Turf Installer, prior to acceptance, shall remedy an average G-max value outside this range, or individual reading more than 15% outside this range. Satisfactory G-max testing shall be a fixed requirement for final acceptance of the synthetic turf installation. It is understood that testing at substantial completion may result in G- max valves less than the specified range. The turf manufacturer/installer will arrange for repeat G-max testing at the six (6) month anniversary of field delivery and will take any and all action required to gain compliance with the specified range. 4. Over the life of the guarantee, the Synthetic Turf Manufacturer/Installer shall arrange and pay for annual re-testing of the field using the same procedure, if requested by the Owner. The Synthetic Turf Manufacturer/Installer shall take whatever action is required to remedy any average G-max value greater than 15% of the average value at installation, and to remedy any areas with individual readings over 160. These costs will be included in the turf unit price proposal. Over the life of the warranty, changes in the average G-Max that exceed +15% of the original installed system shall be remedied by the synthetic turf manufacturer/Installer within 30-days of the deficient test result. E. HIC: 1. Performed upon completion of synthetic turf carpet, infill and resilient pad. 2. The General Contractor shall provide the necessary testing data to the Owner, verifying that the finished field meets the required hemisphere impact attenuation (HIC), as per ASTM F1292. Immediately upon substantial completion, the General Contractor shall arrange for HIC testing by a certified laboratory subject to approval by Designer. Testing will be performed at a minimum of then locations selected by the Designer"In-House" laboratories with a business affiliation to the turf manufacturer and/or installer are unacceptable. 3. The HIC value at installation shall be below 1,000 at 1.3m for each location tested. 4. Over the life of the guarantee, the synthetic turf manufacturer/installer shall arrange and pay for annual re-testing of the field using the same procedure if requested by the Owner. The synthetic turf manufacturer/installer shall take whatever action is required to remedy any HIC value greater than 1,000. These costs will be included in the turf unit price proposal. Over the life of the warranty, changes in HIC values SYNTHETIC FIELD SURFACING 321823 - 6 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 greater that 1,000 shall be remedied by the synthetic turf manufacturer/installer within 30-days of the deficient test result. F. Vertical Deformation (AAA): 1. Performed upon completion of synthetic turf carpet, infill and resilient pad. 2. The General Contractor shall provide the necessary testing to the Owner, verifying that the finished field meets the required vertical deformation test using the Advanced Artificial Athlete (AAA) method. Immediately upon substantial completion, the General Contractor shall arrange for testing by a certified laboratory subject to approval by the Designer. Testing will be performed at a minimum of ten locations. "In-House" laboratories with a business affiliation to the turf manufacturer and/or installer are unacceptable. 3. The vertical deformation value at installation shall be between 5mm and 10mm. G. Surface Planarity/Surface Regularity: 1. Performed upon completion of finished stone base. 2. The General Contractor shall provide the necessary testing to the Owner, verifying that the finished stone base of the field meets the required surface regularity, as per FIFA's recommended EN 13036 Surface Planarity/ Surface Regularity testing. Prior to turf installation, the General Contractor shall arrange for testing of the finished stone base by an independent certified testing agency/laboratory subject to approval by the Designer. "In-House" agencies/laboratories with a business affiliation to the turf manufacturer and/or installer are unacceptable. 3. The surface planarity/regularity value at installation shall be <10mm differential over 3m straight edge. The Contractor shall also perform a field survey on the finished stone base using laser operation surveying equipment at 30 feet maximum grid pattern to confirm stone elevations are within %-inch of proposed slope/elevation. Deviations/irregularities beyond this tolerance shall be corrected prior to the installation of pad and synthetic turf carpet. 1.10 GUARANTEE A. The Synthetic Turf Supplier shall provide a written guarantee stating that all work executed under this section will be free from defects of material and workmanship for a period of eight (8) years from date of Substantial Completion, and that any defects will be remedied on written notice at no additional cost to the Owner. The warranty shall be in writing and shall be signed by the Installer and synthetic field surfacing materials manufacturer. Guarantee shall include removal and replacement of materials as required, to repair synthetic field surfacing at no cost to the Owner. This warranty shall not be pro-rated, rather it shall provide for the full replacement value of defective aspects of the installation throughout the life of the warranty, with no maximum per claim coverage amount. Nothing contained in the manufacturer's written warranty language or failure to provide a manufacturer's written warranty shall supersede or limit the contractual obligations in this Specification. SYNTHETIC FIELD SURFACING 321823 - 7 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 B. In addition to the manufacturer's warranty described above, the synthetic turf manufacturer will provide the Owner with a third party insurance policy acceptable to the Owner with a minimum aggregate of $5,000,000, pre-paid for a full eight (8) years and not-cancelable, issued in the name of the Owner, by a US Insurance company with an A.M. Best rated "A" or better, which provides the same warranty coverage established above, in the event that the turf manufacturer is unable or unwilling to provide the specified coverage. A copy of the policy will be required prior to the General Contractor contract award and its review and approval by the Owner is a condition of the General Contract award. An executed policy in the Owner's name will be required prior to final payment. Policies that include self-insurance or self-retention clauses shall not be considered. 1.11 FOLLOW-UP VISITS A. The Turf Installation Contractor shall include in their price, two (2) follow-up visits and a follow-up meeting with the owner at six (6) month intervals after the Final Turf Inspection date. The visits shall be scheduled by the Owner or Engineer to inspect the condition of the synthetic turf, infill material, seams, painted lines, anchorage, and peripheral attachments. These follow up inspection shall include G-max testing. Items found to require repair, amendment, or replacement shall be the responsibility of the Turf Manufacturer/Installer. Repairs, except those required due to vandalism, shall take place immediately upon notification by the Engineer. PART 2 — PRODUCTS 2.1 GENERAL A. This specification covers the installation of a new outdoor Infilled Synthetic Turf System comprised of tufted, slit and monofilament dual-fiber synthetic turf with a mixture of silica sand and rubber filled into the pile. The installed system shall have a permeability rate in excess of 16 inches per hour. The tufted synthetic turf is comprised of polyethylene fibers tufted into a urethane backed, porous carpet, meeting F.D. Doc FF1-70 and ASTM D- 2859 flammability requirements, with an abrasion index of less than 25 per ASTM F1015. 2.2 ARTIFICIAL TURF ANCHORING SYSTEM A. Anchoring system shall be in accordance with the details provided in the construction plans. 2.3 SYSTEM COMPONENTS A. The turf system consists of the following components: 1. Base Stone, A vertical draining base of crushed stone consisting of a permeable layer of crushed aggregate topped by a permeable Finish Stone course of finer crushed aggregate, 1" or less in thickness. SYNTHETIC FIELD SURFACING 321823 - 8 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 2. A synthetic turf carpet consisting of nominal 2.25" long polyethylene slit and monofilament fibers (dual-fiber), regardless of the turf system to be installed, tufted into a permeable double-layered primary backing with a secondary backing. Dual fiber tufting shall be single needle stitch such that both slit film and monofilament fibers are tufted simultaneously. The carpet is installed directly on the crushed stone base. 3. An infill system consisting of a mixture comprised of selected and graded dust-free silica sand and specially treated and mixed ground rubber. The infill material fills the voids between the fibers allowing the fibers to remain vertical and nondirectional. The infill is installed so as to leave approximately 1/2)) of the tufts clear of the top of the infill. 2.4 PREPARATION OF THE SOIL BED A. All topsoil, organic, and non-compactable materials shall be stripped, hauled, and disposed of. Final quantification of this material is the responsibility of the Contractor. The Engineer has provided a geotechnical engineering report and soil test pit data for the Contractor's use in quantifying material to be removed. If material is encountered below sub-grade elevations that does not meet the compaction requirements, the Contractor must notify the Engineer immediately prior to excavation of in-situ material. B. The soil bed and subbase materials must be compacted in accordance with Specification Section 31 2000 Earth Moving. C. The soil bed must be prepared to tolerances of not more than 1/4" in 10' from the nominal height to allow for even drainage. Laser grading is recommended. D. A pervious geotextile fabric (Mirafi 140N or equal) shall be installed to cover the soil bed in accordance with installation details. 2.5 BASE STONE A. Dynamic Base stone shall be clean crushed rock consisting of the angular fragments obtained by breaking and crushing shattered natural rock, free from detrimental quantities of thin or elongated pieces, free from dirt or other objectionable materials, and shall have a percentage of wear as determined by the Los Angeles Abrasion Test (AASHTO-T96), of not more than 30. B. Base stone must be laid without damaging the soil bed. It is very important to not create any depressions with heavy equipment. The specified stone or aggregate supplied must conform to the turf manufacturer's recommended specifications, as well as this specification. The crushed stone or aggregate base supplied must be stable and sufficiently permeable to ensure all-weather availability of the field. C. The base shall be constructed in two (2) or more layers or lifts of approximate equal thickness. Each layer must be compacted in both directions to attain the specified compaction rate. D. The finished crushed stone base surface of the leveling course shall not vary from the specified grade by more than %4" in 10' when measured in any direction. SYNTHETIC FIELD SURFACING 321823 - 9 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 E. Aggregate base beneath final grade shall be a graded, granular, non-frost susceptible, free-drainage material, consisting of either durable stone or coarse sand blends practically free from loam and clay fines, and which can be readily compacted to form a stable foundation, graded as follows: Sieve Size % Passing by Weight 1 in. 100 3/4 in. 95-100 1/2 i n. 75-95 3/8 i n. 45-70 No. 4 30-45 No. 10 15-30 No. 40 5-10 No. 100 0-5 No. 200 0-2 2.6 FINISH STONE A. The finish stone aggregate layer should not be more than 1" thick. B. The finish stone shall meet the following gradation requirements: Sieve Size % Passing by Weight /2" 100 3/8" 85-100 No. 8 35-75 No. 16 10-55 No. 30 0-40 No. 50/60 0-15 No. 100 0-8 No. 200 0-2 2.7 TURF SYSTEM COMPONENT MATERIALS A. Carpet Fiber: minimum 2.25-inch-long polyethylene parallel long-slit and monofilament fiber. It must have the following properties: 1. Face Yarn Type: Hybrid of Polyethylene Parallel long-slit & Monofilament single needle orA-B rows. If A-B rows the stitch gauge shall be 3/877 . 2. Face Weight: Minimum 46 oz/sq. yd. 3. Yarn size: 8,000 min. denier 4. Yarn Thickness: 100 microns minimum (slit) and 230 microns (monofilament) minimum 5. Pile Height (Finished): 2.25 inches (50.8 mm) 6. Color: Green with Tan/Vegas Gold "Infield" SYNTHETIC FIELD SURFACING 321823 - 10 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 7. Tufting Gauge: 3/8"-3/4" (If A-B rows the stitch gauge shall be 3/8".) 8. Primary Backing: Minimum Double Layered polypropylene fabric treated with UV inhibitors 8 oz/sy min. 9. Secondary Backing: 20 oz/sy urethane (min) 10. Total Product Weight (without infill): minimum 74 oz/sy 11. Finished Roll Width: 15 feet (4.6 m) 12. Finished Roll Length: Up to 240 feet (73 m) 13. Permeability: Minimum 16" per hour (carpet w/infill in place) 14. Tuft Bind: minimum 10 Ibs/force (with infill in place) 15. Total Infill: Provide 1/2" to 1/" turf fiber reveal. B. Infill 1. Silica sand within the infill mix, 60% - 70% by weight as recommended by the synthetic turf manufacturer to meet the performance and testing requirements of the entire synthetic turf system (carpet, infill, pad, etc.) specified within the Contract Documents, will meet the following size distribution: US MESH % Retained 16 0 to 5 20 10 to 20 30 20 to 40 40 0 to 20 50 0 to 5 2. Sand shall consist of uniform, sub-angular to rounded, single grains. It shall be dust free. Crusher fines are unacceptable. 3. Rubber crumb within the infill mix will meet the following size distribution and requirements: US MESH % Retained 8 0 to 5 10 5to15 14 20 to 55 16 20 to 55 20 10 to 30 30 0 to 5 a. Rubber crumb shall consist of 100% recycled tires (also known as SBR rubber). b. Shall have less than 0.005% free metal content measured in accordance with the ASTM D 5603 7.3.2. c. Shall have less than 0.003%fee fiber content measured in accordance with ASTM SYNTHETIC FIELD SURFACING 321823 - 11 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 D 5603 7.4. d. Shall have less than 0.005% free mineral content measured in accordance with ASTM D 5603 7.3.1. e. The bulk density shall be 26lbs/cubic foot+/-7%. Variation from bag to bag cannot exceed 7%. f. Third party testing documentation shall be submitted to the Engineer for source approval prior to installation. Submitted testing shall be no more than 12 months old. 2.8 FIELD MARKING A. Tufted and inlaid lines: shall be as specified in the drawings and listed in Section 3.4 and shall meet the above material specifications. Height of all inlaid lines shall be equal to that of the installed turf. Lines shall be tufted into the fabric to the extent possible and remaining shall be field inlaid. Provide all field lines and logos as indicated. B. Marking Paint: shall be in conformance with NFHS and MIAA regulations, specifically formulated to be compatible with synthetic field surfacing. The contractor must submit a final striping plan for approval by the Owner and Engineer prior to painting of the synthetic turf fields. 2.9 MAINTENANCE EQUIPMENT— FIELD GROOMER A. The Contractor shall provide a new and complete set of the following turf grooming equipment to the Owner: 1. One (1) Integrated Synthetic Turf Groomer, GreensGroomer 926, or approved equal. 2. One (1) Synthetic Turf Sweeper, GreensGroomer LitterKat 760, or approved equal. 2.11 ATTIC STOCK A. The Contractor shall provide attic stock of 200 sf for carpet in both green and infield color and 2,000 Ibs of infill material. PART 3 - EXECUTION 3.1 GRADING A. Areas to be placed with turf will be compacted and brought approximately to subgrade elevation under Section 31 20 00—Earth Moving before work of this section is performed. Final fine grading, filling, and compaction of subgrade to receive turf, as required to form a firm, uniform, and accurate subgrade at required elevations and to required lines, shall be done under this Section. B. Subgrade of areas to be surfaced with synthetic turf shall be recompacted as required to bring top 9 in. of material immediately below gravel base course to a compaction of at least 90% of maximum density, as determined by ASTM D 1557, Method D. Subgrade compaction shall extend for a distance of a least 1 ft. beyond turf edge. SYNTHETIC FIELD SURFACING 321823 - 12 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 C. The subgrade shall be inspected by Contractor by means of a laser level on a 10-foot grid pattern. Based on Contractor's inspection of the topographical survey,the Contractor shall fine grade the subgrade suitably, including properly rolling and compacting the base. D. Excavation required in gravel subgrade shall be completed before fine grading and final compaction of subgrade are performed. Where excavation must be performed in completed subgrade, subsequent backfill and compaction shall be performed as specified in Section 31 2000— Earth Moving. Completed subgrade after filling such areas shall be uniformly and properly graded. E. Areas being graded or compacted shall be kept shaped and drained during construction. Ruts greater than or equal to 2 in. deep in subgrade, shall be graded out, reshaped as required, and recompacted before placing gravel base course. F. Materials shall not be stored or stockpiled on subgrade. G. Disposal of debris and other material excavated and/or stripped under this section, and material unsuitable for or in excess of requirements for completing work of this Section shall be legally disposed of off-site. 3.2 BASE STONE A. Aggregate base course for surfacing and the spreading, grading, and compaction methods employed shall conform to the specification. B. Compaction of aggregate base course shall be to 90-95% of maximum density as determined by ASTM D 1557, Method D. Stone greater than 1 in. shall be excluded from course. C. Width of base course shall be greater than the width of turf surface, if continuous lateral support is provided during rolling, and shall extend at least two (2) x base thickness beyond edge of the course above, if not so supported. D. Aggregate material shall be applied in lifts less than or equal to 6 in. thick, compacted measure. Each lift shall be separately compacted to specified density, using a 6-ton steel wheel roller or vibratory roller equivalent to a 6-ton static roller, or an approved equivalent. 1. Material shall be placed adjacent to structures only after they have been set to required grade and level. 2. Rolling shall begin at sides and progress to center of crowned areas and shall begin on low side and progress toward high side of sloped areas. Rolling shall continue until material does not creep or wave ahead of roller wheels. 3. Surface irregularities which exceed 1/4 in. measured by means of a 10 ft. long straightedge shall be replaced and properly compacted. E. Subgrade and base course shall be kept clean and uncontaminated. Less select materials shall not be permitted to become mixed with gravel. Materials spilled shall not be permitted to become mixed with gravel. Materials spilled outside specified lines shall be removed and areas repaired. F. Portions of subgrade or of construction above which become contaminated, softened, or SYNTHETIC FIELD SURFACING 321823 - 13 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 dislodged by passing of traffic, or otherwise damaged, shall be cleaned, replaced, and otherwise repaired to conform to the requirements of this specification before proceeding with next operation. G. Finish stone shall be compacted (95% of the maximum density determined by ASTM D- 1557) in both directions. H. The finish stone material shall be sloped from the center longitudinal axis towards the side lines or as shown on the drawings. This layer must be graded using a dual laser guided fine grading system. I. A soil test is required on the finished finish stone surface to be covered by the synthetic turf. These tests must provide the following information: 1. Permeability and/or hydraulic conductivity of drainage base (Lab) 2. Percolation rate of base (in-situ) 3. Moisture content at the time of the test 4. Sieve analysis and plasticity limits determination test (lab) 5. In-situ compaction (measured) J. Turf carpet manufacturer shall approve the finish stone planarity and drainage characteristics in writing prior to installation of the turf carpet. 3.3 SYSTEM CHARACTERISTICS A. Permeability (to ASTM D 4491): The system, turf and base, shall allow a minimum percolation rate of sixteen (16) inches per hour. B. Relative Abrasiveness (to ASTM F 1015): The system has an Abrasiveness Index of 20.2. 3.4 SYNTHETIC FIELD SURFACING A. Prior to the installation of turf, the contractor shall have surveyed the area to be covered and the longitudinal and lateral center lines and perimeter edge lines shall be located, marked, and staked 5 ft. outside of the actual limits of the turf surface. B. After acceptance of the constructed Base, the carpet is laid out on the site and consecutive panels are sewn together at the seams using procedures approved by the Supplier. C. Synthetic field surfacing shall be installed by crews employed by the synthetic field surfacing manufacturer, in strict accordance with manufacturer's recommendations and instructions including but not limited to fabric, adhesives, seaming tape, sewing line, and abutting adjacent materials. D. All turf seams shall be sewn with a double-locked stitch approved by the Turf Supplier. Glued seams may be permitted following review of gluing methods and materials and weather conditions by the Engineer. Glued seams shall be backed with seam tape. SYNTHETIC FIELD SURFACING 321823 - 14 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 E. Seams shall be combed to ensure that threads are not exposed but are hidden within the nap. After grooming, carpet seams which are inconsistent and obvious in the judgment of the Owner's representative will be repaired. F. Synthetic Turf shall be installed with no wrinkles, ripples or bubbles. Shearing of fibers, slits in fabric, or driven spikes to relieve such defects will not be permitted. G. The infill, of Brockfill and selected graded silica sand, is to be approved by the Supplier, and will be inserted according to the Supplier's approved procedures by qualified installers. H. The bristles of any brooms used, either during the original installation, or in subsequent maintenance, shall be of nylon only, shall under no circumstances include any metal, and must be approved by the Supplier. I. Installation Limitations 1. Installation shall not proceed when: a. Ambient air temperature is below forty (40') degrees Fahrenheit (F). b. Material temperature is below forty (40') degrees Fahrenheit (F). c. Rain is falling or pending, unless acceptable to qualified installers. d. Conditions exist, or are pending, that will be unsuitable for the installation of the system. J. Synthetic Field lines shall be Inlaid, Tufted or Painted as Follows. 1. Tufted/ Inlaid and Painted lining for all sports shall be four(4") inches in width, unless noted otherwise, and colored as follows: a. Softball —Tufted/Inlaid White —Tan infield b. Baseball —Tufted/Inlaid White—Tan infield and warning track c. Soccer— Inlaid Yellow tick marks (4" x 4"); no other lines to be inlaid/painted. d. Football — Inlaid Blue tick marks (4" x 4"); no other lines to be inlaid/painted 2. Two (2) inlaid logos shall be installed and contractor shall coordinate actual logo design, size, etc. with the owner and submit shop drawings for owner approval prior to the start of logo work. The color shall be approved by the owner and shall have a minimum of two (2) colors. 3.5 PROTECTION A. Installer shall advise the Contractor of procedures required for protection and maintenance of finished synthetic field surfacing during remainder of construction period so that surfacing will be undamaged at time of acceptance. B. Upon completion of the synthetic field surface, the General Contractor shall be responsible for protection of the field surface for the remainder of the Contract, unless the Owner takes beneficial occupancy prior to contract completion. SYNTHETIC FIELD SURFACING 321823 - 15 North Andover High School Athletic Field Improvements North Andover, MA Gale J N 719560 END OF SECTION G:\719560\02 Design\specs\Division 32-Exterior Improvements\32 18 23-Synthetic Turf-NAHS.docx SYNTHETIC FIELD SURFACING 321823 - 16