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HomeMy WebLinkAboutAgenda 10_SP-22-056_Beta_handoutsSNOW STORAGE VIEW 1 VIEW 2 VIEW 3 VIEW 1 VIEW 2 VIEW 3 UNDER CONSTRUCTION CURRENTLY BUILT UNDER CONSTRUCTION CURRENTLY BUILT LEVEL 2 MEZZANINE XXXXXXXXXXXX X XX X X X XXX XXXXXXXXXXXXXXXXXXX X WVSEEEEEEEWVEBEBBWVWV EEEWVWVSOSW SWVSWVWVWWVWV WVWBBBBBSBLUE 53BLUE TW LIGHTBLUE 53BLUEBLUEBLUE 23BLUEGARAGE DOORA-9A-14A-17A-2A-11A-18A-1 STARTA-6A-7A-4A-8A-3A-15A-19A-12A-16A-5A-13A-10WOOD STEPSVSE822 MAGHUBN 715488.664E 1472772.821EL 336.095VSE810 MAGHUBN 715699.276E 1473095.279EL 335.41410'DIA BOULDER/4'AGBLUELARGE BOULDERSLEDGELEDGELEDGERIP-RAPRIP-RAPLEDGEBOULDERSCENTER 10 ' WIDEGARAGE DOORSILL 318.3CENTER 3 'WIDE DOORSILL 318.3BLUEBLUEBLUEPAVEDCENTER 3 'WIDE DOORSILL 318.3STEPSPAVEDPAVEDPAVEDGRAVELGRAVELGRAVELGRAVELGRAVELGRAVELWOODSWOODSWOODSBRUSHWOODSWOODSWOODS1 1/2"WIDE/1 1/2"TALL WOOD CURB XXXXXCENTER 3'WIDE DOORSILL 318.3BLUEBLUEBLUEBLUEBLUEBLUEBLUEBLUEBLUEBLUEBLUEBLUEBLUEBLUEEXISTING STATE HWY ROWEXISTING STATE HWY ROWEXISTING STATE HWY ROWEXISTING STATE HWY ROWEXISTING STATE HWY ROWEXISTING STATE HWY ROWOSW TG=323.62'INV. 24"RCP IN=317.41 'WATER LEVEL=280.0'BOT.=276.7'RIM=325.15 'COULD NOT ACCESSpppppppppppppp pppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp pppppppppppppppppppppppppppppppppppppppp pppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp p p p p pp p pp p p p p ppp pppppp OHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEOHEX X X X X X X X X X X X X X +339.95+339.5>>>325'320'30BRUSHEXI S T I N G P R O P E R T Y L I N E / Z O N I N G L I N E \\us0261-ppfss01\workgroup\1794\active\179450350\transportation\permitting\Issued_for_Permit_01_31_2022_CAD_drawings\Exhibit\Master Plan Permit Application\179450350_SK-001_Stormwater.dwg2/21/2023 9:59 AM By: Merkle, Geoffrey© 2018 StantecProject No.ScaleNotesIssued/Revision6A54321BCDEConsultantPermit/SealYYYY.MM.DD218421340Stantec Consulting Services Inc.193 Tilley Dr., Suite 101South Burlington VT 05403 U.S.A.802.864.0223www.stantec.comTel.PERMIT SET2023-02-22STORMWATERCONDITIONS PLANSK-001As indicatedISSUED FOR PERMIT2023.02.22\\us0261-ppfss01\workgroup\1794\active\179450350\transportation\permitting\Issued_for_Permit_01_31_2022_CAD_drawings\Exhibit\Master Plan Permit Application\179450350_SK-001_Stormwater.dwg, SK-001, 2/21/2023 10:21:36 AM 1 Gendron, Christopher From:Tom DiPietro <tdipietro@southburlingtonvt.gov> Sent:Tuesday, February 21, 2023 3:00 PM To:Gendron, Christopher; Adam Cate Subject:RE: 'EXTERNAL'BETA Campus Parking | SP-22-056 Chris,    I’m good with the responses. Thank you for the opportunity to comment.    ‐Tom    From: Gendron, Christopher <Chris.Gendron@stantec.com>   Sent: Friday, February 17, 2023 3:01 PM  To: Tom DiPietro <tdipietro@southburlingtonvt.gov>; Adam Cate <acate@SouthBurlingtonVT.gov>  Subject: 'EXTERNAL'BETA Campus Parking | SP‐22‐056            This message has originated from an External Source. Please use proper judgment and caution when opening  attachments, clicking links, or responding to this email.         Hi Tom, Adam, We had a chance to review your comments on the BETA Campus parking application and offer the following responses and have provided the requested information. Please review what we have provided and if you have any questions, please don’t hesitate to reach out. If you’re good with our responses, please respond to that effect as backup to provide to P&Z. 1. Please confirm that the applicant’s intent is for both Valley Road and DaVinci Drive to remain private. Confirmed.  2. Please confirm that the applicant’s intent is to maintain ownership of all trails (referred to as rec path on sheet L‐000).  Confirmed.  3. What is the trail material? Bituminous Asphalt Pavement  4. Please confirm that the applicant’s intent is to maintain ownership of wastewaterpump stations and force mains.  Confirmed.  5. Sheet C‐202A shows an existing abandoned force main. Is this line capped on private property or at Williston Road?  Please provide some history on this line, if available. Plan is to have this cut, capped and abandoned at the Right‐of‐way  once the system gets switched over to the new pump station. Spring 2023.  6. Sheet C‐102 – Due to the amount of line work in the area, the work proposed on Williston Road is difficult to decipher.  Please provide a zoomed in sheet showing these areas. Plans and details attached. See sheets CR‐104 and CR‐105 (page 4  and 5)  for zoomed in area. These were reviewed and approved by VTrans.  7. Provide a detail for the widening of Williston Road. Specifically, I’d like to understand where pavement will be added /  replaced. My assumption is that Williston Road will receive a new top coat of pavement from curb to curb within the  project limits (i.e. the area where it is being widened). Also provide details on line‐striping materials proposed. Plans and  details attached. See sheet CR‐101 (page 1) for typical section. Your assumption is correct, new topcoat curb to curb.  8. The applicant is reminded that they will need a ROW permit to work in any City owned ROW. If working in a section of  Williston Road that is owned by VTrans, the applicant is reminded that they will need an 1111 permit from VTrans. The  portion of Williston Road ROW impacted by this application is a State highway. There is no City owned ROW involved  with this project. Section 1111 was issued on 09/02/22. We had our preconstruction meeting with VTrans on February 3,  2 2023 to review the conditions of the section 1111 permits in preparation to begin work in March. This work remains  unchanged from the previously approved SD‐21‐28 application.  9. The applicant is proposing new sidewalk in the Williston Road ROW owned by the State of Vermont. On‐going  maintenance of this sidewalk will likely be a condition of the 1111 permit. The proposed sidewalk does not connect to any  existing sidewalk that is maintained by the City. We support the construction of this new sidewalk infrastructure, but the  applicant must agree to maintain it until such time as it connects to the City’s existing sidewalk network. Alternatively,  the applicant can  connect the proposed sidewalk to the City’s existing sidewalk further to the west on Williston Road (near 2026 Williston  Road). Once this connection is made, the City will maintain the sidewalk. The applicant agrees to maintain the sidewalk  until such time a connection is made.   10. Provide a detail for the wastewater connection at the intersection of Valley and Williston Road. Attached is the  wastewater connection application provided to Betsy Brown on 9/15/2022 that includes a detail.  11. Please provide a detail for the bus shelter. Foundation detail is in the attached plan set, sheet CR‐102  (page 2). See  Enseicom Bus Shelter cut sheets attached.    Best, Christopher Gendron PE  Associate Direct: 802-497-6402 Mobile: 802-324-0920 christopher.gendron@stantec.com Stantec   The content of this email is the confidential property of Stantec and should not be copied, modified, retransmitted, or used for any purpose except with Stantec's written authorization. If you are not the intended recipient, please delete all copies and notify us immediately.   Caution: This email originated from outside of Stantec. Please take extra precaution.   Attention: Ce courriel provient de l'extérieur de Stantec. Veuillez prendre des précautions supplémentaires.   Atención: Este correo electrónico proviene de fuera de Stantec. Por favor, tome precauciones adicionales.  30.9"VARIES PERPAVEMENTTYPE*6" MINNOT TO SCALESILVA CELL SYSTEM 2XSTREET ADJACENT WALK ORBUILDING6" MINVARIES6" MIN1"- 6"JMPKNRS4" MIN0FQFGDIMENSIONS VARY PER PROJECTREFER TO SILVA CELL LAYOUTIH0CDBTUAELVTK E Y P L A NAKHSILVA CELL SYSTEM (DECK, BASE, AND POSTS)BDEEPROOT ROOT BARRIER, 12" OR 18", DEPTH DETERMINED BY THICKNESS OFPAVEMENT SECTION, INSTALL DIRECTLY ADJACENT TO CONCRETE EDGERESTRAINTDEJLIFGROOT BALLTREE OPENING TREATMENT, PER PROJECT SPECIFICATIONSGEOTEXTILE FABRIC TO EDGE OF EXCAVATIONCOMPACTED BACKFILL, PER PROJECT SPECIFICATIONSGEOGRID, WRAPPED AROUND PERIMETER OF SYSTEM, WITH 6" TOE(OUTWARD FROM BASE) AND 12" EXCESS (OVER TOP OF DECK)CABLE TIE, ATTACHING GEOGRID TO SILVA CELLAT BASE OF UPPER LEG FLARE, AS NEEDEDANCHORING SPIKES, CONTACT DEEPROOT FOR ALTERNATIVE1" TO 6" SPACING BETWEEN SILVA CELLS AT BASE4" MIN AGGREGATE SUB BASE, COMPACTED TO 95% PROCTORGEOTEXTILE FABRIC, PLACED ABOVE SUBGRADESUBGRADE, COMPACTEDPAVEMENT AND AGGREGATE BASE PER PROJECT *CSILVA CELL BASE SLOPE, 10% MAXQPLANTING SOIL BELOW ROOT BALL, COMPACTED WELL TO PREVENT SETTLINGMTHICKENED EDGE AT TREE OPENING (TO BE USED WITH CONCRETE)NRIBBON CURB AT TREE OPENING (TO BE USED WITH PAVERS OR ASPHALT)POSRPLANTING SOIL, PER PROJECT SPECIFICATIONS,PLACED IN LIFTS AND WALK-IN COMPACTED TO 75-85% PROCTORDEEPROOT WATER AND AIR VENT, ROOTBALL, WHEN REQUIREDUDEEPROOT WATER AND AIR VENT, WHEN REQUIREDTVUNDERDRAIN SYSTEM, WHEN REQUIRED (LOCATION AND DETAILS BY OTHERS)*MINIMUM PAVEMENT PROFILE OPTIONS TO MEET H-20 LOADINGPAVEMENT + AGGREGATE BASE COURSE4" CONCRETE ............... + 4" AGGREGATE3" PAVER ..................... + 12"AGGREGATE4" ASPHALT .................. + 12"AGGREGATE2.6" PAVER .................... + 5" CONCRETE N O T E S1.EXCAVATION SHALL BE DONE IN ACCORDANCE WITH ALL APPLICABLE HEALTH AND SAFETYREGULATIONS2.INSTALLATION TO BE COMPLETED IN ACCORDANCE WITH MANUFACTURER'S SPECIFICATIONS3.PROVIDE SUPPLEMENTAL IRRIGATION4.DO NOT SCALE DRAWINGSDeepRoot Green Infrastructurewww.deeproot.comT 415 781 9700F 415 781 0191NOT TO SCALEINCHESCOPYRIGHT © 2019| DEEPROOT GREEN INFRASTRUCTURE (ALL RIGHTS RESERVED)RELEASE VERSION: V01.01 | RELEASE DATE: 2019.03.20 SILVA CELL SYSTEM 2X © DeepRoot Green Infrastructure, LLC V01.01: 02/06/2019 32 94 51 - PAGE 1 SILVA CELL SYSTEM This guide specification was prepared utilizing 3-part format recommended by the Construction Specifications Institute (CSI), and generally incorporates recommendations from their SectionFormat™/Page Format™, and MasterFormat®, latest Editions, insofar as practicable. Carefully review and edit the text to meet the Project requirements and coordinate this Section with the remainder of the Specifications and the Drawings. Where bracketed text is indicated, e.g. [text], make appropriate selection and delete the remainder of text within additional brackets, highlighting, and bold face type, if any. This specification defines material and performance requirements for the "Silva Cell System”. The Specifier should adapt these specifications to reflect specific project requirements. Consult the manufacturer for assistance in editing this guide specification for specific Project applications where necessary, including conventional applications, and for assistance evaluating and sizing design elements for Silva Cell stormwater applications. This Specification was current at the time of publication but is subject to change. Please confirm the accuracy of these specifications with the manufacturer prior to use. Some elements in these specifications require coordination with Project drawings; these items are noted "as indicated on plans or drawings" or similar phrases. Refer to the DeepRoot website, www.deeproot.com for additional information. SECTION 32 94 51 SOIL CELLS ("SILVA CELL SYSTEM”) PART 1 - GENERAL 1.01 SUMMARY A. Section Includes: 1. Silva Cell system for planting and paving, including Silva Cell assemblies and related accessories. 2. Other materials including, but not limited to, geotextile, geogrid, aggregate, subbase material, backfill, root barrier, Water + Air System, and planting soil. SPECIFIER: Delete paragraph below if planting soils will be installed under a separate contract. B. Materials Installed But Not Furnished Under This Section: 1. Planting soils are furnished in Section 32 94 56 - Planting Soil for Silva Cells. C. Related Requirements: 1. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section. © DeepRoot Green Infrastructure, LLC 32 94 51 – PAGE 2 V01.01: 02/06/2019 SILVA CELL SYSTEM SPECIFIER: Revise Section numbers and titles in subparagraphs below per CSI MasterFormat and Project requirements. 2. Section 01 33 00 - Submittal Procedures: For administrative and procedural requirements for processing of submittals during the construction phase. 3. Section 01 77 00 - Closeout Procedures: For administrative and procedural requirements for completion of the Work. SPECIFIER: Sections listed below are examples only; revise Section numbers and titles in subparagraphs below to suit Project requirements. 4. Section 32 12 16 - Asphalt Paving 5. Section 32 13 13 - Concrete Paving 6. Section 32 14 00 - Unit Paving 7. Section 32 84 00 - Planting Irrigation 8. Section 32 93 00 - Plants 1.02 REFERENCES A. Definitions: 1. AGGREGATE BASE COURSE: Aggregate material between the paving and the top of the Silva Cell deck below, designed to distribute loads across the top of the deck. SPECIFIER: Delete subparagraph below if pavers are not a part of the Project. 2. AGGREGATE SETTING BED FOR PAVERS: Aggregate material between the aggregate base course and unit surface pavers, designed to act as a setting bed for the pavers. 3. AGGREGATE SUBBASE: Aggregate material between the bottom of the Silva Cell base and the compacted subgrade below, designed to distribute loads from the Silva Cell bases to the subgrade. 4. BACKFILL: The earth used to replace or the act of replacing earth in an excavation beside the Silva Cell system to the excavation extents. 5. FINISH GRADE: Elevation of finished surface of planting soil or paving. 6. PLANTING SOIL: Soil as defined in Division 32, Section 32 94 56 - Planting Soil for Silva Cells, intended to fill the Silva Cell system and other planting spaces. 7. SILVA CELL SYSTEM: a. Silva Cell: One assembled unit made up of 1 base, 6 post assemblies, and 1 Silva Cell deck. b. Silva Cell System: Two or more Silva Cells used in combination with each other and with required accessories. 8. SUBGRADE: Surface or elevation of subsoil remaining after completing excavation, or top surface of a fill or backfill. 9. WALK-THROUGH COMPACTION: A process for light compaction of soils by walking through the soil following placement. a. Walk through compaction shall result in 75-85 percent of maximum dry density in accordance with ASTM D698, Standard Proctor Method. Do not exceed root limiting compaction for the given soil type. B. Reference Standards: SPECIFIER: Use care when indicating the edition date of the referenced standards; these standards are subject to regular review, and updated accordingly. 1. American Association of State Highway and Transportation Officials (AASHTO): a. AASHTO H-20 2. ASTM International (ASTM): © DeepRoot Green Infrastructure, LLC V01.01: 02/06/2019 32 94 51 - PAGE 3 SILVA CELL SYSTEM a. ASTM D448-12, Standard Classification for Sizes of Aggregate for Road and Bridge Construction b. ASTM D698-12e1, Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort (12 400 ft-lbf/ft3 [600 kN-m/m3]) c. ASTM D1241-07, Standard Specification for Materials for Soil-Aggregate Subbase, Base, and Surface Courses d. ASTM D3786/D3786M-13, Standard Test Method for Bursting Strength of Textile Fabrics-Diaphragm Bursting Strength Tester Method e. ASTM D4491-99a(2014)e1, Standard Test Methods for Water Permeability of Geotextiles by Permittivity f. ASTM D4533-D4533M-15, Standard Test Method for Trapezoid Tearing Strength of Geotextiles g. ASTM D4632-D4632M-15, Standard Test Method for Grab Breaking Load and Elongation of Geotextiles h. ASTM D4751-12, Standard Test Method for Determining Apparent Opening Size of a Geotextile i. ASTM D4833/D4833M-07(2013)e1, Standard Test Method for Index Puncture Resistance of Geomembranes and Related Products j. ASTM D5262-07(2012), Standard Test Method for Evaluating the Unconfined Tension Creep and Creep Rupture Behavior of Geosynthetics k. ASTM D6241-14, Standard Test Method for Static Puncture Strength of Geotextile and Geotextile-Related Products Using a 50mm Probe l. ASTM D6637-11, Standard Test Method for Determining Tensile Properties of Geogrids by the Single or Multi-Rib Tensile Method SPECIFIER: Delete reference below if Project is not located in Canada. 3. Ontario Provincial Standard Specification (OPSS) 1.03 ADMINISTRATIVE REQUIREMENTS SPECIFIER: Select either "Landscape Architect", "Architect" or "Engineer" in paragraph below as applicable. A. Preinstallation Conference: Prior to installation of the Silva Cell system and associated Work, meet with the Contractor, Silva Cell system installer and their field supervisor, manufacturer's technical representative, the [Landscape Architect] [Architect] [Engineer], the Owner at the Owner's discretion, and other entities concerned with the Silva Cell system performance. 1. Provide at least 72 hours advance notice to participants prior to convening preinstallation conference. 2. Introduce and provide a roster of individuals in attendance with contact information. 3. The preinstallation conference agenda will include, but is not limited to the review of: a. Required submittals both completed and yet to be completed. b. The sequence of installation and the construction schedule. c. Coordination with other trades. d. Details, materials and methods of installation. 1) Review requirements for substrate conditions, special details, if any, installation procedures. 2) Installation layout, procedures, means and methods. e. Mock-up requirements. B. Sequencing and Scheduling: 1. General: Prior to beginning Work of this Section, prepare a detailed schedule of the Work involved for coordination with other trades. 2. Schedule utility installations prior to beginning Work of this Section. 3. Where possible, schedule the installation of the Silva Cell system after the area is no longer required for use by other trades and Work. Where necessary to prevent damage, protect installed system if Work must occur over or adjacent to the installed Silva Cell system. © DeepRoot Green Infrastructure, LLC 32 94 51 – PAGE 4 V01.01: 02/06/2019 SILVA CELL SYSTEM 1.04 SUBMITTALS A. Action Submittals: Submit in accordance with Section [01 33 00] [other]: SPECIFIER: Select paragraph A above if detailed submittal requirements are specified in Division 01 and revise Section number if necessary to match that used in the Project Manual, or; select paragraph A below if Division 01 is not a part of the Project Manual; keep subparagraphs 1 through 5 with either paragraph A selected. Select either "Landscape Architect", "Architect", or "Engineer" in the paragraph below as applicable. A. Action Submittals: Submit these to the [Landscape Architect] [Architect] [Engineer] for review and acceptance not less than 45 days prior to start of installation of materials and products specified in this Section. 1. Product Data: For each type of product, submit manufacturer's product literature with technical data sufficient to demonstrate that the product meets these specifications. 2. Test and Evaluation Reports: a. Submit results of compaction testing required by the Specifications for approval. b. Include analysis of bulk materials including soils and aggregates, by a recognized laboratory that demonstrates that the materials meet the Specification requirements. 3. Samples: a. One full size sample of an assembled Silva Cell (copy of manufacturers brochure with images of product may be accepted in lieu of product sample). b. Manufacturer's product data/specification sheet for geogrid. c. Manufacturer's product data/specification sheet for geotextile. d. Manufacturer’s product data/specification sheet for Water+Air System components (when specified as part of the system) 4. Manufacturer's Report: Submit Silva Cell system manufacturer's letter of review and approval of the Project, including Drawings and Specifications, Addenda, Clarifications and Modifications, and for compliance with product installation requirements. 5. Qualification Statements: a. Manufacturer: 1) Submit list of completed projects demonstrating durability and longevity of in- place systems. a) Include project name, location, and date of completion. SPECIFIER: Delete subparagraph below if system is not being designed for stormwater management. 2) Submit list of third party approval for stormwater management projects. b. Installer: 1) Submit documentation of the qualifications of the Silva Cell system installer and their field supervisor, sufficient to demonstrate that both meet the requirements specified in Article 1.05 QUALITY ASSURANCE. 2) Submit list of completed projects of similar scope and scale demonstrating capabilities and experience. B. Closeout Submittals: Submit in accordance with Section [01 33 00] [other]: SPECIFIER: Select paragraph B above if detailed submittal requirements are specified in Division 01 and revise Section number if necessary to match that used in the Project Manual, or; select paragraph B below if Division 01 is not a part of the Project Manual. Select either "Landscape Architect", "Architect", or "Engineer" in the paragraph below as applicable. © DeepRoot Green Infrastructure, LLC V01.01: 02/06/2019 32 94 51 - PAGE 5 SILVA CELL SYSTEM B. Closeout Submittals: Submit these to the [Landscape Architect] [Architect] [Engineer] at completion of installation. 1. Warranty: Submit manufacturer's warranty, fully executed. 1.05 QUALITY ASSURANCE A. Comply with applicable requirements of the laws, codes, ordinances and regulations of Federal, State and Municipal authorities having jurisdiction. Obtain necessary permits/approvals from these authorities. B. Manufacturer Qualifications: 1. A manufacturer whose product is manufactured in an ISO/TS 16949 compliant and ISO 9001 - 2008 registered factory. 2. A manufacturer with not less than 100 Silva Cell systems in-place, each system in use for not less than 7 years, confirming durability and longevity of the system. 3. A manufacturer with documented written approval of their product for use as a stormwater treatment device by a minimum of 3 governmental jurisdictions. 4. A manufacturer with an established and demonstrated utility service and repair process, including written procedure and photographs demonstrating work. 5. A manufacturer with a published operating and maintenance manual C. Installer Qualifications: A qualified installer with not less than 5 years of successful experience installing Silva Cell systems or related products and materials, and whose work has resulted in successful installation of underground piping, chambers and vault structures, planting soils, and planter drainage systems of a similar scope and scale in dense urban areas. SPECIFIER: Select either "Landscape Architect", "Architect" or "Engineer" in paragraph below as applicable. D. Installer's Field Supervisor: A full-time supervisor employed by the installer with not less than 5 years of successful experience similar to that of the installer and present at the Project site when Work is in progress. Utilize the same field supervisor throughout the Project, unless a substitution is submitted to and approved in writing by the [Landscape Architect] [Architect] [Engineer]. E. Mock-Up: Prior to the installation of the Silva Cell system, construct a mock-up of the complete installation at the Project site in the presence of the Landscape Architect. 1. Size and Extent: Minimum of 100 sq. ft. (10 sq. m.) in area and including the complete Silva Cell system installation with subbase, aggregate subbase, drainage installation, Silva Cell decks, posts, and bases, base course aggregate, geotextile, geogrid, backfill, planting soil, and necessary accessories. 2. The mock-up area may remain as part of the installed Work at the end of the Project provided that it remains undamaged and meets the requirements of the Drawings and Specifications. 1.06 DELIVERY, STORAGE, AND HANDLING A. Silva Cell System: Protect Silva Cell system components from damage during delivery, storage and handling. 1. Store components on smooth surfaces, free from dirt, mud and debris. Store under tarp to protect from sunlight when time from delivery to installation exceeds one week. 2. Perform handling with equipment appropriate to the size (height) of Silva Cells and site conditions; equipment may include, hand, handcart, forklifts, extension lifts, or small cranes, with care given to minimize damage to Silva Cell bases, posts, decks and adjacent assembled Silva Cells. B. Packaged Materials: Deliver packaged materials in original, unopened containers indicating weight, certified analysis, name and address of manufacturer, and indication of conformance with State and Federal laws, if applicable. Protect materials from deterioration during delivery and while on the Project site. © DeepRoot Green Infrastructure, LLC 32 94 51 – PAGE 6 V01.01: 02/06/2019 SILVA CELL SYSTEM 1. Do not deliver or place backfill, soils, or soil amendments in frozen, wet, or muddy conditions. 2. Provide protection including tarps, plastic and/or matting between bulk materials and finished surfaces sufficient to protect the finish material. 3. Bring planting soil to the site using equipment and methods that do not overly mix and further damage soil peds within the soil mix. D. Provide erosion-control measures to prevent erosion or displacement of bulk materials and discharge of soil-bearing water runoff or airborne dust to adjacent properties, water conveyance systems, and walkways. Provide additional sediment control to retain excavated material, backfill, soil amendments and planting mix within the Project limits as needed. 1.07 FIELD CONDITIONS A. Existing Conditions: Do not proceed with Work when subgrades, soils and planting soils are in a wet, muddy or frozen condition. 1.08 WARRANTY SPECIFIER: This Warranty gives the Owner specific legal rights, and the Owner may also have other legal rights, which vary from state to state, or in Canada, from province to province. Some states do not allow the exclusion of incidental or consequential damages, so the stated limitations and exclusions may not apply. A. The Contractor shall warrant the Silva Cell system to be free of faults and defects in accordance with the General Conditions, except that the warranty shall be extended by manufacturer's written warranty against defects in materials and workmanship as follows: 1. DeepRoot® warrants to the original purchaser of its Silva Cell™ product that such product will be free from defects in materials and workmanship, and perform to DeepRoot's written specifications for the warranted product, when installed and used as specifically provided in the product's installation guidelines for a period of 20 years from the date of purchase. This warranty does not cover wear from normal use, or damage caused by abuse, mishandling, alterations, improper installation and/or assembly, accident, misuse, or lack of reasonable care of the product. This warranty does not apply to events and conditions beyond DeepRoot's control, such as ground subsidence or settlement, earthquakes and other natural events, acts of third parties, and/or Acts of God. If this warranty is breached, DeepRoot® will provide a replacement product. Incurred costs, such as labor for removal of the original product, installation of replacement product, and the cost of incidental or other materials or expenses are not covered under this warranty. 2. Deeproot® makes no other warranties, express or implied, and specifically disclaims the warranty of merchantability or fitness for a particular purpose. Deeproot® shall not be liable either in tort or in contract for any direct, incidental or consequential damages, lost profits, lost revenues, loss of use, or any breach of any express or implied warranty. PART 2 - PRODUCTS 2.01 MANUFACTURER A. Acceptable Manufacturers: DeepRoot Green Infrastructure, LLC 101 Montgomery Street, Suite 2850 San Francisco, CA, 94104 Phone: 415.781.9700 Toll Free: 800.458.7668 Fax: 415.781.0191 www.deeproot.com © DeepRoot Green Infrastructure, LLC V01.01: 02/06/2019 32 94 51 - PAGE 7 SILVA CELL SYSTEM B. Substitutions: Manufacturers seeking approval of their products are required to comply with the Owner's Instructions to Bidders, generally contained in the Project Manual. SPECIFIER: Select paragraph B above or below as applicable, if substitutions will be allowed during the bidding process. If using paragraph B below, select either "Landscape Architect", "Architect", or "Engineer", and adjust the length of time in subparagraph 1 for prior approval according to your practice. B. Substitutions: Manufacturers seeking approval of their products are required to comply with the Owner's Instructions to Bidders, generally contained in the Project Manual. If such instructions are not included in Division 00 or Division 01, submit requests as specified herein. 1. Submit proposed substitutions to the [Landscape Architect] [Architect] [Engineer] not less than [7] [other] days prior to the date for receipt of Bids. SPECIFIER: Select paragraph B below for a specification when substitutions are NOT allowed and delete the 2 paragraphs above. B. No substitutions are allowed. 2.02 DESCRIPTION SPECIFIER: The Silva Cell System is designed to support AASHTO H-20 loading (United States) CSA- S6 87.5 (Canada). The entire assembly as described in this specification is necessary in order to meet this loading performance. Alternative assemblies may void Silva Cell warranty. Contact DeepRoot Green Infrastructure, LLC for approval of alternative assemblies. A. The term Silva Cell shall be used to refer to a single Silva Cell. B. Silva Cells shall be designed for the purpose of growing healthy trees and providing stormwater management. C. Silva Cells shall be modular, structural systems. D. Each Silva Cell shall be structurally-independent from all adjacent Silva Cells for incorporating utilities and other site features as well as for future repairs. E. Silva Cells shall be capable of supporting loads up to and including AASHTO H-20 (United States) or CSA-S6 87.5 kN (Canada) when used in conjunction with approved pavement profiles. F. Silva Cells shall be open on all vertical faces and horizontal planes and shall have no interior walls or diaphragms. G. Silva Cells shall be capable of providing a large, contiguous, continuous volume of planting soil that does not inhibit or prevent the following: 1. Placement of planting soil 2. Walk through compaction 3. Compaction testing of planting soil, once in place 4. Movement and growth of roots 5. Movement of water within the provided soil volume, including lateral capillary movement 6. Installation and maintenance of utilities placed within, adjacent to, or below the Silva Cell. H. Silva Cells shall be able capable of being filled with a variety of soil types and soils that include peds 2 inches (50 mm) or larger in diameter as is appropriate for the application, location of the installation, and tree species. 2.03 SILVA CELL MATERIALS AND ACCESSORIES A. Silva Cell System Components: Each "Silva Cell" soil cell module (hereafter Silva Cell or "cell") is composed of one base, 6 post assemblies, and one deck. SPECIFIER: Select one or more of the Silva Cell assemblies specified below as applicable to your Project design. © DeepRoot Green Infrastructure, LLC 32 94 51 – PAGE 8 V01.01: 02/06/2019 SILVA CELL SYSTEM [1. 1x Silva Cell System: a. Components: One base, six 1x posts, and one deck. b. Assembled Dimensions (Each Cell): 47.2 inches long by 23.6 inches wide by 16.7 inches high (1200 mm long by 600 mm wide by 424 mm high).] [2. 2x Silva Cell System: a. Components: One base, six 2x posts, and one deck. b. Assembled Dimensions (Each Cell): 47.2 inches long by 23.6 inches wide by 30.9 inches high (1200 mm long by 600 mm wide by 784 mm high).] [3. 3x Silva Cell System: a. Components: One base, six 3x posts (a combination of six 1x posts and six 2x posts), and one deck. b. Assembled Dimensions (Each Cell): 47.2 inches long by 23.6 inches wide by 43 inches high (1200 mm long by 600 mm wide by 1092.2 mm high).] B. Silva Cell Materials and Fabrication: 1. Bases and Posts: Homopolymer polypropylene. 2. Decks: Fiberglass reinforced, chemically-coupled, impact modified polypropylene. C. Manufacturer's Related Silva Cell Installation Accessories: 1. Strongbacks: An accessory designed to stabilize the Silva Cell posts temporarily, during soil placement, and removed for reuse prior to placing decks. 2. Anchoring Spikes: 10” landscape spike for securing assembled Silva Cells to subbase. 2.04 RELATED PRODUCTS A. Root Barrier: Recyclable, black, injection molded panels manufactured with a minimum 50 percent post-consumer recycled polypropylene plastic with UV inhibitors, and integrated zipper joining system which allows instant assembly by sliding one panel into another; for redirecting tree roots down and away from hardscapes. 1. Panel Sizes: a. No. UB12-2: 24 inches long by 12 inches deep by 0.080 inches thick (61 cm long by 30 cm deep by 2.03 mm thick); for use with 1x systems and for pavement profiles less than 12 inches (30 cm) deep. b. No. UB18-2: 24 inches long by 18 inches deep by 0.080 inches thick (61 cm long by 46 cm deep by 2.03 mm thick); for use with 2x and 3x systems, and for pavement profiles 12 inches or more in depth. 2. Products meeting this specification: a. DeepRoot Tree Root Barrier (DeepRoot Green Infrastructure, LLC) SPECIFIER: Select one or more of the Water+Air System assemblies specified below as applicable to your Project design. B. Water+Air System: Used as a standalone system or in conjunction with the Silva Cell, the Water+Air System enables water and air to be directly added to tree roots and the surrounding soil system. [1. Water+Air System 01: a. Cast aluminum body b. Stainless steel grate c. Height -3 ¾” (85mm) d. Compatible with 3” and 4” (80mm and 100mm) pipe [2. Water+Air System 02: a. Cast aluminum body b. Stainless steel gate c. Threaded for adjustable height © DeepRoot Green Infrastructure, LLC V01.01: 02/06/2019 32 94 51 - PAGE 9 SILVA CELL SYSTEM d. Height- adjustable 3 ½” (89mm) – 10 ½” (267mm) e. Compatible with 3” and 4” (80mm and 100mm) diameter pipe SPECIFIER: The Following pipe is an optional component of Water+Air System 01 and 02 assemblies specified above. [f. Pipe 1. High density polyethylene corrugated pipe 2. Compliant with ASTM F405 and F667, SCS 606 and AASHTO M252 3. Knife cut perforations [3. Water+Air System (Root Ball) a. 3” diameter pipe (length per size of tree opening), compatible tee, flexible transition, and heavy-duty plastic grate 5. Products meeting this specification: a. DeepRoot Water+Air System (DeepRoot Green Infrastructure, LLC) SPECIFIER: The following products may be provided by DeepRoot Green Infrastructure, LLC, or by other sources. B. Geogrid: Net-shaped woven polyester fabric with PVC coating, uniaxial or biaxial geogrid, inert to biological degradation, resistant to naturally occurring chemicals, alkalis, and acids; used to provide a stabilizing force within soil structure as the fill interlocks with the grid. 1. Tensile strength at ultimate (ASTM D6637): a. 1850 lbs/ft (27.0 kN/m) minimum 2. Creep reduced strength (ASTM D5262): a. 1000 lbs/ft (14.6 kN/m) minimum 3. Long term allowable design load (GRI GG-4): a. 950 lbs/ft (13.9 kN/m) minimum 4. Grid aperture size (MD): a. 0.8 inch (20 mm) minimum 5. Grid aperture size (CD): a. 1.28 inch (32 mm) maximum 6. Roll size: 6-foot (1.8-m) width is preferred, up to 18-foot (5.4-m). 7. Products meeting this specification: a. Stratagrid SG 150; http://www.geogrid.com b. Miragrid 2XT; http://www.tencate.com c. Fortrac 35 Geogrid; (http://www.hueskerinc.com d. SF 20 Biaxial Geogrid; http://www.synteen.com C. Geotextile: composed of high tenacity polypropylene yarns which are woven into a network such that the yarns retain their relative position and is inert to biological degradation and resistant to naturally encountered chemicals, alkalis, and acids. 1. Tensile strength at ultimate (ASTM D4595): a. 4800 lbs/ft (70.0 KN/m) MD minimum b. 4800 lbs/ft (70.0 KN/m) CD minimum 2. Tensile strength at 5% strain (ASTM D4595) a. 2400 lbs/ft (35.0 KN/m) MD minimum b. 3000 lbs/ft (43.8 KN/m) CD minimum 3. Flow rate (ASTM D4491): a. 30 gal/min/ft2 (2648 l/min/m2) minimum 4. Apparent opening size (ASTM D4751): a. 30 sieve (0.60 mm) 5. UV Resistance (at 500 hours): a. 80 percent strength retained 6. Products meeting this specification: a. Mirafi HP570; http://www.tencate.com © DeepRoot Green Infrastructure, LLC 32 94 51 – PAGE 10 V01.01: 02/06/2019 SILVA CELL SYSTEM b. Geolon PP40; http://www.tencate.com c. Nilex Woven 2044 (Nilex); http://www.nilex.com D. Plastic Cable Ties: A tensioning device or tool used to tie similar or different materials together with a specific degree of tension. 2.05 OTHER RELATED MATERIALS A. Wood Blocking: Nominal dimensioned untreated lumber used for spacing assembled Silva Cells. B. Drain and Distribution Pipes: SPECIFIER: Consult with Project Engineer for proper selection and add information below or refer to their Specification Section. 1. [Insert applicable drain pipe selection] [Refer to Section 32 84 00] [insert other Section title] C. Aggregate Subbase (Below Silva Cell Base): 1. Aggregate meeting one of the following specifications: SPECIFIER: Consult with Project Engineer for proper selection and edit accordingly. a. Complying ASTM D1241, Type I, Gradation B; Type I mixtures shall consist of stone, gravel, or slag with natural or crushed sand and fine mineral particles passing a No. 200 sieve. Sieve Percent Passing 1-1/2 inches (37.5 mm) 100 1 inch (25 mm) 75 to 95 3/8 inch (9.5 mm) 40 to75 No 4 (4.75 mm) 30 to 60 No 10 (2 mm) 20 to 45 No 40 (425 μm) 15 to 30 No 200 (75 μm) 5 to 15 b. Local Department of Transportation (DOT) virgin aggregate that most closely meets the gradation of ASTM D1241. c. Ontario Provincial Standard Specification (OPSS) 1010 Granular A. Dense graded aggregates intended for use as granular base within the pavement structure, granular shouldering, and backfill. Sieve Percent Passing 26.5 mm 100 19 mm 85 to100 13.2 mm 65 to90 9.5 mm 50 to73 4.75 mm 35 to55 1.18 mm 15 to 40 300 μm 5 to 22 75 μm 2 to 8 D. Aggregate Base Course (Above Silva Cell Deck): 1. Same as aggregate subbase specified above. E. Aggregate Base Course for Porous Pavement (Above Silva Cell Deck): 1. Aggregate complying with ASTM D448, No. 57. © DeepRoot Green Infrastructure, LLC V01.01: 02/06/2019 32 94 51 - PAGE 11 SILVA CELL SYSTEM Sieve Percent Passing 1-1/2 inches (37.5 mm) 100 1 inch (25 mm) 95 to 100 1/2 inch (12.5 mm) 25 to 60 No 4 (4.75 mm) 0 to 10 No 8 (2.36 mm) 0 to 5 F. Setting Bed for Unit Pavers (Above Silva Cell Deck): 1. Aggregate complying with ASTM D448, No. 8. Sieve Percent Passing 1/2 inch (12.5 mm) 100 3/8 inch (9.5 mm) 85 to 100 No 4 (4.75 mm) 10 to 30 No 8 (2.36 mm) 0 to 10 No 16 (1.18 mm) 0 to 5 G. Backfill Material (Adjacent to Silva Cells): Clean, compactable, coarse grained fill soil free of organic material, trash and other debris, and free of toxic material injurious to plant growth. H. Planting Soil: Refer to Section 32 94 56 - Planting Soil for Silva Cells. PART 3 - EXECUTION 3.01 EXAMINATION A. Examine the conditions under which the Silva Cells are to be installed. 1. Carefully check and verify dimensions, quantities, and grade elevations. 2. Carefully examine the Drawings to become familiar with the existing underground conditions before digging. Verify the location of aboveground and underground utility lines, infrastructure, other improvements, and existing trees, shrubs, and plants to remain including their root system. SPECIFIER: Select either "Landscape Architect", "Architect", or "Engineer" in the subparagraph below as applicable. 3. Notify the Contractor and the [Landscape Architect] [Architect] [Engineer] in writing in the event of conflict between existing and new improvements, of discrepancies, and other conditions detrimental to proper and timely completion of the installation. 4. Obtain written approval of changes to the Work prior to proceeding. Proceed with installation only after changes have been made and unsatisfactory conditions have been corrected. 3.02 PREPARATION A. Take proper precautions as necessary to avoid damage to existing improvements and plantings. B. Prior to the start of Work, layout and stake the limits of excavation and horizontal and vertical control points sufficient to install the complete Silva Cell system. C. Coordinate installation with other trades that may impact the completion of the Work. 3.03 TEMPORARY PROTECTION A. Protect open excavations and Silva Cell system from access and damage both when Work is in progress and following completion, with highly visible construction tape, fencing, or other means until related construction is complete. B. Do not drive vehicles or operate equipment over the Silva Cell system until the final surface material has been installed. 3.04 EXCAVATION © DeepRoot Green Infrastructure, LLC 32 94 51 – PAGE 12 V01.01: 02/06/2019 SILVA CELL SYSTEM A. General: Excavate to the depths and shapes indicated on the Drawings. Provide smooth and level excavation base free of lumps and debris. B. Confirm that the depth of the excavation is accurate and includes the full section of materials required to place the subbase aggregate, Silva Cell, and pavement profile as indicated on the Drawings. C. Over-excavate beyond the perimeter of the Silva Cell to allow for: 1. The extension of aggregate subbase beyond the Silva Cell layout as shown on the Drawings. 2. Adequate space for proper compaction of backfill around the Silva Cell system. D. If unsuitable subgrade soils are encountered, consult the Owner's geotechnical consultants for directions on how to proceed. SPECIFIER: Select either "Landscape Architect", "Architect", or "Engineer" in the paragraph below as applicable. E. If conflicts arise during excavation, notify the [Landscape Architect] [Architect] [Engineer] in writing and make recommendations for action. Proceed with Work only when action is approved in writing. 3.05 SUBGRADE COMPACTION A. Compact subgrade to a minimum of 95 percent of maximum dry density at optimum moisture content in accordance with ASTM D698, Standard Proctor Method, or as approved by the Owner’s geotechnical representative. B. Do not exceed 10 percent slope for subgrade profile in any one direction. If the 10 percent slope is exceeded, contact manufacturer's representative for directions on how to proceed. 3.06 INSTALLATION OF GEOTEXTILE OVER SUBGRADE A. Install geotextile over compacted subgrade. 1. Lay geotextile flat with no folds or creases. 2. Install the geotextile with a minimum joint overlap of 18 inches (450 mm). 3.07 INSTALLATION OF AGGREGATE SUBBASE BELOW SILVA CELL BASES A. Install aggregate subbase to the depths indicated on the Drawings. B. Extend subbase aggregate a minimum of 6 inches (150 mm) beyond the base of the Silva Cell layout. C. Compact aggregate subbase to a minimum of 95 percent of maximum dry density at optimum moisture content in accordance with ASTM D698, Standard Proctor Method. D. Do not exceed 10 percent slope on the surface of the subbase. Where proposed grades are greater than 10 percent, step the Silva Cells to maintain proper relation to the finished grade. 3.08 INSTALLATION OF SILVA CELL BASE A. Install the Silva Cell system in strict accordance with manufacturer's instructions and as specified herein; where requirements conflict or are contradictory, follow the more stringent requirements. B. Layout and Elevation Control: 1. Provide layout and elevation control during installation of the Silva Cell system to ensure that layout and elevations are in accordance with the Drawings. C. Establish the location of the tree openings in accordance with the Drawings. Once the trees are located, mark the inside dimensions of the tree openings on the prepared subbase. D. Locate and mark other Project features located within the Silva Cell layout (e.g. light pole bases, utility pipes). Apply marking to identify the extent of the Silva Cell layout around these features. © DeepRoot Green Infrastructure, LLC V01.01: 02/06/2019 32 94 51 - PAGE 13 SILVA CELL SYSTEM Follow the layout as shown on the Drawings to ensure proper spacing of the Silva Cell bases. Refer to the Drawings for offsets between these features and the Silva Cells. E. Check each Silva Cell component for damage prior to placement. Reject cracked or chipped units. SPECIFIER: Select either "Landscape Architect", "Architect", or "Engineer" in the paragraph below as applicable. F. Place the Silva Cell bases on the compacted aggregate subbase. Start at the tree opening and place Silva Cell bases around the tree openings as shown on the Drawings. G. Working from tree opening to tree opening, place Silva Cell bases to fill in the area between tree openings. 1. Maintain spacing no less than 1 inch (25 mm) and no more than 6 inches (150 mm) apart, assuming geotextile covering the decks meets the specifications in section 2.04 paragraph C. SPECIFIER: Select either "Landscape Architect", "Architect", or "Engineer" in the paragraph below as applicable. H. Follow the Silva Cell layout plan as shown on the Drawings. I. Install Silva Cell bases around, over, or under existing or proposed utility lines, as indicated on the Drawings. J. Level each Silva Cell base as needed to provide full contact with subbase. Adjust subbase material, including larger pieces of aggregate, so each base sits solidly on the surface of the subbase. Silva Cell bases that rock or bend over any stone or other obstruction protruding above the surface of the subbase material are not allowed. Silva Cell bases which bend into dips in the subbase material are not allowed. The maximum tolerance for deviations in the plane of the subbase material under the bottom of the horizontal beams of each Silva Cell base is 1/4 inch in 4 feet (6 mm in 1200 mm). K. Anchor Silva Cell base with 2 anchoring spikes per base. 1. For applications where Silva Cells are installed over waterproofed structures, use wood blocking or similar spacing system consistent with requirements of the waterproofing system to maintain required spacing. 3.09 INSTALLATION OF SILVA CELL POSTS SPECIFIER: Select either "1x", "2x", or "3x" or a combination of "1x", "2x", or "3x" in the paragraphs below as applicable. A. [1x Silva Cell System: 1. Attach 1x posts to the installed Silva Cell base. Each base will receive six 1x posts. Place the end of the post with tabs into the base. Rotate post clockwise to snap in place.] A. [2x Silva Cell System: 1. Attach 2x posts to the installed Silva Cell base. Each base will receive six 2x posts. Place the end of the post with tabs into the base. Rotate post clockwise to snap in place.] A. [3x Silva Cell System: 1. Attach 2x posts to the installed Silva Cell base. Each base will receive six 2x posts. Place the end of the post with tabs into the base. Rotate post clockwise to snap in place. 2. Following the placement of backfill and planting soil within the 2x posts, add a 1x post extension as described herein. A 2x post, used in combination with a 1x post is considered a 3x post assembly.] © DeepRoot Green Infrastructure, LLC 32 94 51 – PAGE 14 V01.01: 02/06/2019 SILVA CELL SYSTEM 3.10 INSTALLATION OF STRONGBACKS, GEOGRID, BACKFILL AND PLANTING SOIL SPECIFIER: Delete the first paragraph below if there are no drain lines within the system. A. For Silva Cell systems that have a perforated drain line located inside or adjacent to the system, consult Drawings for layout and details for requirements. B. Install strongbacks on top of the Silva Cell posts by snapping into place over installed posts prior to installing planting soil and backfill. 1. Strongbacks are required only during the placement and compaction of the planting soil and backfill. 2. Move strongbacks as the Work progresses across the installation. 3. Remove strongbacks prior to the installation of the Silva Cell decks. C. Install geogrid around the perimeter of the Silva Cell system where the compacted backfill and planting soil interface. 1. Do not place geogrid between the edge of the Silva Cells and adjacent planting areas. 2. Cut the geogrid to allow for a 6-inch (150-mm) overlap at the Silva Cell base and a 12-inch (300-mm) overlap at the Silva Cell deck. 3. Provide a minimum 12-inch (300-mm) overlap between adjacent sheets of geogrid. 4. Secure geogrid with cable ties below the top of the posts, along the post ridges. D. Place the first lift of backfill material loosely around the perimeter of the Silva Cell system, between the geogrid and the sides of the excavation. Place backfill to approximately the midpoint of the Silva Cell post. Do not compact. E. Place the first lift of planting soil in the Silva Cell system to approximately the midpoint of the Silva Cell post. 1. Level the planting soil throughout the system. 2. Walk-through the placed planting soil to remove air pockets and settle the soil. a. Lightly compact soils by walking through the soil following placement. b. Walk through compaction shall result in 75-85 percent of maximum dry density in accordance with ASTM D698, Standard Proctor Method. Do not exceed root limiting compaction for the given soil type. F. Compact the first lift of backfill material, previously spread, to 95 percent of maximum dry density in accordance with ASTM D698, Standard Proctor Method or in accordance with Project Specifications for hardscape areas, whichever is greater. G. Add and compact additional backfill material so that the final finished elevation is at approximately the same level of the placed planting soil within the Silva Cells. 1. Maintain the geogrid between the Silva Cell system and the backfill material at all times. H. Place the second lift of backfill material loosely around the perimeter of the Silva Cell system, between the geogrid and the sides of the excavation so that the material is 2 to 3 inches below the top of the posts. Do not compact. I. Place the second lift of planting soil inside of the Silva Cell to the bottom of the strongbacks. Walk through compact. SPECIFIER: For 1x or 2x System, skip to Article 3.11 - INSTALLATION OF IRRIGATION AND WATER HARVESTING SYSTEM. SPECIFIER: For 3x System, continue below. J. Remove strongbacks, place one 1x posts into each of the previously-installed 2x posts. Rotate clockwise to snap in place, forming a 3x post assembly. K. Immediately reinstall strongbacks on top of the post assembly. L. Repeat process of alternately placing backfill and planting soil so that elevation of the compacted backfill and the walked-through compacted planting soil are just below the level of the strongbacks. © DeepRoot Green Infrastructure, LLC V01.01: 02/06/2019 32 94 51 - PAGE 15 SILVA CELL SYSTEM 3.11 INSTALLATION OF IRRIGATION AND WATER HARVESTING SYSTEM (including but not limited to Deeproot Water+Air System components) SPECIFIER: Water is critical to the success of the Silva Cell system; trees planted in the Silva Cell system must receive adequate water to ensure survival of the living system during periods of drier weather. Harvest of natural rainwater or supplemental water must be a part of the system, either through pressurized or non-pressurized systems, within the soil of the Silva Cell system. Coordinate with required irrigation installations. Irrigation should be installed within the entire soil system, not only at the tree openings. A. Install irrigation and water harvesting system in accordance with the Drawings and Specifications. Remove only the minimum number of strongbacks needed to accommodate the Work and reinstall them immediately upon completion to maintain alignment of posts. 3.12 INSTALLATION OF SILVA CELL DECK SPECIFIER: Select either "Landscape Architect", "Architect", or "Engineer" in the paragraph below as applicable. A. Obtain final approval by the [Landscape Architect] [Architect] [Engineer] of planting soil installation prior to installation of the Silva Cell decks. B. Remove strongbacks, level out the planting soil, and immediately install decks over the posts below. Place deck over the top of the posts. Push decks down until the deck clips lock into the posts, snapping the deck into place. C. Fold the 12 inches (300 mm) of geogrid onto the top of the decks. 3.13 FINAL BACKFILL PLACEMENT AND COMPACTION A. Place and compact final lift of backfill material to 95 percent of maximum dry density in accordance with ASTM D698, Standard Proctor Method, such that the backfill is flush with the top of the installed deck. Do not allow compacting equipment to come in contact with the decks. 3.14 INSTALLATION OF GEOTEXTILE AND AGGREGATE BASE COURSE OVER THE DECK A. Ensure geotextile meets the specifications in section 2.04 paragraph C. B. Place geotextile over the top of the deck and extend to the edge of the excavation. Overlap joints a minimum of 18 inches (450 mm). Leave enough slack in the geotextile for the aggregate base course to push the geotextile down in the gaps in between the decks. C. Install the aggregate base course (including aggregate setting bed if installing unit pavers) over the geotextile immediately after completing the installation of the fabrics. Work the aggregate from one side of the layout to the other so that the fabric and aggregate conform to the Silva Cell deck contours. D. Maintain equipment used to place aggregate base course completely outside the limits of the Silva Cell excavation area to prevent damage to the installed system. E. For large or confined areas, where aggregate cannot easily be placed from the edges of the excavated area, obtain approval for the installation procedure and types of equipment to be used in the installation from the Silva Cell manufacturer. F. Compact aggregate base course(s) to 95 percent of maximum dry density in accordance with ASTM D698, Standard Proctor Method. Utilize a vibration or plate compactor with a maximum weight of 800 lbs (362.87 kg). G Do not drive vehicles or operate equipment over the completed aggregate base course. 3.15 INSTALLATION OF CONCRETE CURBS AT TREE OPENINGS, AGGREGATE SUBBASE AND PAVEMENT ABOVE THE SILVA CELL SYSTEM A. Place concrete curbs along planting areas and tree openings as shown on the Drawings to retain the aggregate base course from migrating into the planting soil. © DeepRoot Green Infrastructure, LLC 32 94 51 – PAGE 16 V01.01: 02/06/2019 SILVA CELL SYSTEM B. When staking concrete forms (e.g. curbs around the tree openings), prevent stakes from penetrating the Silva Cell decks. C. Turn down edge of concrete paving to the Silva Cell deck along the edges of tree openings or planting areas to retain the aggregate base course material. D. When paving type is a unit paver or other flexible material, provide a concrete curb under the paving at the edge of the Silva Cell deck to retain the aggregate base course material at the tree opening. E. Place paving material over Silva Cell system in accordance with the Drawings. 1. The Silva Cell system does not fully meet loading strength until the final paving is installed. Do not operate construction equipment on top of the Silva Cell system until paving installation has been completed. F. Use care when placing paving or other backfill on top of Silva Cell system to prevent damage to the Silva Cell system or its components. 3.16 INSTALLATION OF ROOT BARRIERS A. Install root barrier in accordance with manufacturer's installation instructions. 3.17 INSTALLATION OF PLANTING SOIL WITHIN THE TREE PLANTING AREA A. Remove rubble, debris, dust and silt from the top of the planting soil within the tree opening that may have accumulated after the initial installation of the planting soil within the Silva Cells. B. Install additional planting soil within the tree openings, to the depths indicated on the Drawings. 1. Use the same soil used within the Silva Cells for planting soil within the tree openings. C. Compact planting soil under the tree root ball as needed to prevent settlement of the root ball. D. Place trees in accordance with the Drawings. 3.18 PROTECTION A. Keep construction traffic away from the limits of the Silva Cells until the final pavement profile is in place. The Silva Cell system does not fully meet loading strength until the final paving is installed. 1. Do not operate equipment directly on top of the Silva Cell system until paving installation has been completed. 2. Provide fencing and other barriers to prevent vehicles from entering into the Silva Cell area. B. When the Silva Cell installation is completed and the permanent pavement is in place, limit traffic and construction related activities to only loads less than the design loads. 3.19 CLEAN UP A. Perform clean up during installation and upon completion of the Work. Maintain the site free of soil, sediment, trash and debris. Remove excess soil materials, debris, and equipment from the site following completion of the Work of this Section. B. Repair damage to adjacent materials and surfaces resulting from installation of this Work using mechanics skilled in remedial work of the construction type and trades affected. END OF SECTION BETA Technologies B3 Facility South Burlington, VT Wagner Hodgson Landscape Architecture 03/11/2022 SOIL PREPARATION 329113 - 1 SECTION 329113 - SOIL PREPARATION PART 1 - GENERAL 1.1 SUMMARY A. Section includes planting soils specified by composition of the mixes. B. Related Requirements: 1. Section 311000 "Site Clearing" for topsoil stripping and stockpiling. 1.2 DEFINITIONS A. Duff Layer: A surface layer of soil, typical of forested areas, that is composed of mostly decayed leaves, twigs, and detritus. B. Imported Soil: Soil that is transported to Project site for use. C. Manufactured Soil: Soil produced by blending soils, sand, stabilized organic soil amendments, and other materials to produce planting soil. D. Planting Soil: Existing, on-site soil; imported soil; or manufactured soil that has been modified as specified with soil amendments and perhaps fertilizers to produce a soil mixture best for plant growth. E. Subgrade: Surface or elevation of subsoil remaining after excavation is complete, or the top surface of a fill or backfill before planting soil is placed. F. Subsoil: Soil beneath the level of subgrade; soil beneath the topsoil layers of a naturally occurring soil profile, typified by less than 1 percent organic matter and few soil organisms. G. Surface Soil: Soil that is present at the top layer of the existing soil profile. In undisturbed areas, surface soil is typically called "topsoil"; but in disturbed areas such as urban environments, the surface soil can be subsoil. H. USCC: U.S. Composting Council. 1.3 PREINSTALLATION MEETINGS A. Preinstallation Conference: Conduct conference at Project site. 1.4 ACTION SUBMITTALS A. Product Data: For each type of product. BETA Technologies B3 Facility South Burlington, VT Wagner Hodgson Landscape Architecture 03/11/2022 SOIL PREPARATION 329113 - 2 B. Sustainable Design Submittals: 1. Environmental Product Declaration (EPD): For each product. C. Samples: For each bulk-supplied material in sealed containers labeled with content, source, and date obtained; providing an accurate representation of composition, color, and texture. 1.5 INFORMATIONAL SUBMITTALS A. Field quality-control reports. 1.6 QUALITY ASSURANCE A. Testing Agency Qualifications: An independent, state-operated, or university-operated laboratory; experienced in soil science, soil testing, and plant nutrition; with the experience and capability to conduct the testing indicated; and that specializes in types of tests to be performed. 1. Laboratories: Subject to compliance with requirements, provide testing by one of the following: a. Connecticut: Soil Nutrient Analysis Laboratory, University of Connecticut b. Maine: Maine Soil Testing Service, University of Maine c. Massachusetts/Rhode Island: Soil & Plant Tissue Testing Laboratory, University of Massachusetts d. New Hampshire: UNH Cooperative Extension Soil Testing, University of New Hampshire e. New York/Vermont: Cornell Nutrient Analysis Laboratories, Cornell University f. Pennsylvania: Ag. Analytical Ser. Laboratory, Pennsylvania State University g. Vermont: Agricultural and Environmental Testing Lab, University of Vermont h. If state is not listed above, contact cooperative extension office in project’s state. Discuss with Landscape Architect prior to submission. 1.7 PRECONSTRUCTION TESTING A. Preconstruction Testing Service: Engage a qualified testing agency to perform preconstruction soil analyses on existing, on-site soil and imported soil. 1. Notify Landscape Architect seven days in advance of the dates and times when laboratory samples will be taken. B. Preconstruction Soil Analyses: For each unamended soil type, perform testing on soil samples and furnish soil analysis and a written report containing soil-amendment and fertilizer BETA Technologies B3 Facility South Burlington, VT Wagner Hodgson Landscape Architecture 03/11/2022 SOIL PREPARATION 329113 - 3 recommendations by a qualified testing agency performing the testing according to "Soil- Sampling Requirements" and "Testing Requirements" articles. 1. Have testing agency identify and label samples and test reports according to sample collection and labeling requirements. C. Additional Project Soil Testing: Provide Landscape Architect with copy of any existing soil tests, including foundation borings for reference and review by Landscape Architect. 1.8 SOIL-SAMPLING REQUIREMENTS A. General: Extract soil samples according to requirements in this article. B. Sample Collection and Labeling: Have samples taken and labeled by Contractor in presence of Landscape Architect, under the direction of the testing agency. 1. Number and Location of Samples: Follow direction of testing agency for quantity and location of samples for each soil to be used or amended for landscaping purposes. 2. Procedures and Depth of Samples: a. Follow directions from testing agency for recommended sample-collection method. b. Or according to: According to USDA-NRCS's "Field Book for Describing and Sampling Soils (available online) 3. Labeling: Label each sample with the date, location keyed to a site plan or other location system, visible soil condition, and sampling depth. 1.9 TESTING REQUIREMENTS: EXISTING ON-SITE SURFACE SOIL A. General: Perform tests on soil samples according to requirements in this article. B. Physical Testing: 1. Soil Texture: Soil-particle, size-distribution analysis by one of the following methods according to SSSA's "Methods of Soil Analysis - Part 1-Physical and Mineralogical Methods": a. Sieving Method: Report sand-gradation percentages for very coarse, coarse, medium, fine, and very fine sand; and fragment-gradation (gravel) percentages for fine, medium, and coarse fragments; according to USDA sand and fragment sizes. b. Hydrometer Method: Report percentages of sand, silt, and clay. 2. Total Porosity: Calculate using particle density and bulk density according to SSSA's "Methods of Soil Analysis - Part 1-Physical and Mineralogical Methods." C. Chemical Testing: 1. CEC: Analysis by sodium saturation at pH 7 according to SSSA's "Methods of Soil Analysis - Part 3- Chemical Methods." . 2. Metals Hazardous to Human Health: Test for presence and quantities of RCRA metals including aluminum, arsenic, barium, copper, cadmium, chromium, cobalt, lead, lithium, BETA Technologies B3 Facility South Burlington, VT Wagner Hodgson Landscape Architecture 03/11/2022 SOIL PREPARATION 329113 - 4 and vanadium. If RCRA metals are present, include recommendations for corrective action. 3. Phytotoxicity: Test for plant-available concentrations of phytotoxic minerals including aluminum, arsenic, barium, cadmium, chlorides, chromium, cobalt, copper, lead, lithium, mercury, nickel, selenium, silver, sodium, strontium, tin, titanium, vanadium, and zinc. D. Fertility Testing: Soil-fertility analysis according to standard laboratory protocol of SSSA NAPT NEC-67 including the following: 1. Percentage of organic matter. 2. CEC, calcium percent of CEC, and magnesium percent of CEC. 3. Soil reaction (acidity/alkalinity pH value). 4. Buffered acidity or alkalinity. 5. Nitrogen ppm. 6. Phosphorous ppm. 7. Potassium ppm. 8. Manganese ppm. 9. Manganese-availability ppm. 10. Zinc ppm. 11. Zinc availability ppm. 12. Copper ppm. 13. Sodium ppm and sodium absorption ratio. 14. Soluble-salts ppm. 15. Presence and quantities of problem materials including salts and metals cited in the Standard protocol. If such problem materials are present, provide additional recommendations for corrective action. 16. Other deleterious materials, including their characteristics and content of each. E. Recommendations: Based on the test results, state recommendations for soil treatments and soil amendments to be incorporated to produce satisfactory planting soil suitable for healthy, viable plants indicated. Submit results of soil test for review by landscape architect. As approved by landscape architect, follow recommendations for each plant-type as listed in plans. 1.10 TESTING REQUIREMENTS: IMPORTED, NATURALLY FORMED SOIL A. General: Perform tests on soil samples according to requirements in this article. B. Physical Testing: 1. Soil Texture: Soil-particle, size-distribution analysis by one of the following methods according to SSSA's "Methods of Soil Analysis - Part 1-Physical and Mineralogical Methods": a. Sieving Method: Report sand-gradation percentages for very coarse, coarse, medium, fine, and very fine sand; and fragment-gradation (gravel) percentages for fine, medium, and coarse fragments; according to USDA sand and fragment sizes. b. Hydrometer Method: Report percentages of sand, silt, and clay. C. Chemical Testing: BETA Technologies B3 Facility South Burlington, VT Wagner Hodgson Landscape Architecture 03/11/2022 SOIL PREPARATION 329113 - 5 1. CEC: Analysis by sodium saturation at pH 7 according to SSSA's "Methods of Soil Analysis - Part 3- Chemical Methods." 2. Metals Hazardous to Human Health: Test for presence and quantities of RCRA metals including aluminum, arsenic, barium, copper, cadmium, chromium, cobalt, lead, lithium, and vanadium. If RCRA metals are present, include recommendations for corrective action. 3. Phytotoxicity: Test for plant-available concentrations of phytotoxic minerals including aluminum, arsenic, barium, cadmium, chlorides, chromium, cobalt, copper, lead, lithium, mercury, nickel, selenium, silver, sodium, strontium, tin, titanium, vanadium, and zinc. D. Fertility Testing: Soil-fertility analysis according to standard laboratory protocol of SSSA NAPT NEC-67 including the following: 1. Percentage of organic matter. 2. CEC, calcium percent of CEC, and magnesium percent of CEC. 3. Soil reaction (acidity/alkalinity pH value). 4. Buffered acidity or alkalinity. 5. Macronutrients 6. Micronutrients 7. Soluble-salts ppm. 8. Presence and quantities of problem materials including salts and metals. If such problem materials are present, provide additional recommendations for corrective action. 9. Other deleterious materials, including their characteristics and content of each. E. Recommendations: Based on the test results, state recommendations for soil treatments and soil amendments to be incorporated to produce satisfactory planting soil suitable for healthy, viable plants indicated. Submit results of soil test for review by landscape architect. As approved by landscape architect, follow recommendations for each plant-type as listed in plans. 1.11 COMPOST TESTING A. General: Perform tests according to USCC Seal of Testing (STA) Program: B. Analysis to include, but not limited to: 1. pH 2. Soluble Salt Concentration (electrical conductivity) 3. Nutrient Content 4. Moisture Content 5. Organic Matter Content 6. Particle Size 7. Trace Elements/Heavy Metals (meet US EPA Part 503 Regulations) 1.12 DELIVERY, STORAGE, AND HANDLING A. Packaged Materials: Deliver packaged materials in original, unopened containers showing weight, certified analysis, name and address of manufacturer, and compliance with state and Federal laws if applicable. B. Bulk Materials: BETA Technologies B3 Facility South Burlington, VT Wagner Hodgson Landscape Architecture 03/11/2022 SOIL PREPARATION 329113 - 6 1. Do not dump or store bulk materials near structures, utilities, walkways and pavements, or on existing turf areas or plants. 2. Provide erosion-control measures to prevent erosion or displacement of bulk materials, discharge of soil-bearing water runoff, and airborne dust reaching adjacent properties, water conveyance systems, or walkways. 3. Do not move or handle materials when they are wet or frozen. 4. Accompany each delivery of bulk fertilizers and soil amendments with appropriate certificates. PART 2 - PRODUCTS 2.1 MATERIALS A. Regional Materials: Acquire imported soil and soil amendments and fertilizers within 100 miles (160 km) of Project site from materials that have been extracted, harvested, or recovered, as well as manufactured, within 100 miles (160 km) of Project site. 2.2 PLANTING SOILS SPECIFIED BY COMPOSITION A. Planting-Soil Type: Existing, on-site surface soil, with the duff layer, if any, retained and stockpiled on-site; modified to produce viable planting soil. Blend existing, on-site surface soil with the following soil amendments and fertilizers in the following quantities to produce planting soil: B. Planting-Soil Type: Imported, naturally formed soil from off-site sources and consisting of sandy loam according to USDA textures; and modified to produce viable planting soil. 1. Sources: Take imported, unamended soil from sources that are naturally well-drained sites where topsoil occurs at least 4 inches (100 mm) deep, not from agricultural land, bogs, or marshes; and that do not contain undesirable organisms; disease-causing plant pathogens; or obnoxious weeds and invasive plants including, but not limited to, quack grass, Johnsongrass, poison ivy, nutsedge, nimblewill, Canada thistle, bindweed, bent grass, wild garlic, ground ivy, perennial sorrel, and bromegrass. 2. Additional Properties of Imported Soil before Amending: Soil reaction of pH 6 to 7 and 5 – 7 percent organic-matter content, friable, and with sufficient structure to give good tilth and aeration. 3. Unacceptable Properties: Clean soil of the following: a. Unacceptable Materials: Concrete slurry, concrete layers or chunks, cement, plaster, building debris, oils, gasoline, diesel fuel, paint thinner, turpentine, tar, roofing compound, acid, and other extraneous materials that are harmful to plant growth. b. Unsuitable Materials: Stones, roots, plants, sod, clay lumps, and pockets of coarse sand that exceed a combined maximum of 8 percent by dry weight of the imported soil. c. Large Materials: Stones, clods, roots, clay lumps, and pockets of coarse sand exceeding 2 inches (50 mm) in any dimension. BETA Technologies B3 Facility South Burlington, VT Wagner Hodgson Landscape Architecture 03/11/2022 SOIL PREPARATION 329113 - 7 4. Amended Soil Composition: Blend imported, unamended soil with soil amendments and fertilizers in quantities as recommended by soil test agency to produce planting soil. 2.3 INORGANIC SOIL AMENDMENTS A. Lime: ASTM C602, agricultural liming material containing a minimum of 80 percent calcium carbonate equivalent and as follows: 1. Class: T, with a minimum of 99 percent passing through a No. 8 (2.36-mm) sieve and a minimum of 75 percent passing through a No. 60 (0.25-mm) sieve. 2. Form: Provide lime in form of ground dolomitic limestone, calcitic limestone, or mollusk shells per soil test recommendations. Note: using dolomitic lime is preferred when both pH and magnesium adjustments are needed; Calctic lime is most appropriate when levels of magnesium are already sufficient; Mollusk shells are most appropriate when Calctic lime is needed (Soil Testing Handbook for Professionals in Agriculture, Horticulture, Nutrient and Residuals Management, University of Maine, 1997; page 29). B. Sulfur: Granular, biodegradable, and containing a minimum of 90 percent elemental sulfur, with a minimum of 99 percent passing through a No. 6 (3.35-mm) sieve and a maximum of 10 percent passing through a No. 40 (0.425-mm) sieve. C. Iron Sulfate: Granulated ferrous sulfate containing a minimum of 20 percent iron and 10 percent sulfur. D. Perlite: Horticultural perlite, soil amendment grade. E. Agricultural Gypsum: Minimum 90 percent calcium sulfate, finely ground with 90 percent passing through a No. 50 (0.30-mm) sieve. F. Sand: Clean, washed, natural or manufactured, free of toxic materials, and according to ASTM C33/C33M. 2.4 ORGANIC SOIL AMENDMENTS A. Compost: Well-composted, stable, and weed-free organic matter produced by composting feedstock, and bearing USCC's "Seal of Testing Assurance," and as follows: 1. Feedstock: Limited to leaves. 2. Reaction: pH of 6.5 to 7.4. 3. Soluble-Salt Concentration: Less than 2.5 dS/m. 4. Moisture Content: 35 to 55 percent by weight. 5. Organic-Matter Content: 30 to 40 percent of dry weight. 6. Particle Size: Minimum of 98 percent passing through a 1-inch (25-mm) sieve. B. Wood Derivatives: Shredded and composted, nitrogen-treated sawdust, ground bark, or wood waste; of uniform texture and free of chips, stones, sticks, soil, or toxic materials. C. Manure: Well-rotted, un-leached, stable or cattle manure containing not more than 25 percent by volume of straw, sawdust, or other bedding materials; free of toxic substances, stones, sticks, soil, weed seed, debris, and material harmful to plant growth. BETA Technologies B3 Facility South Burlington, VT Wagner Hodgson Landscape Architecture 03/11/2022 SOIL PREPARATION 329113 - 8 2.5 FERTILIZERS A. Superphosphate: Commercial, phosphate mixture, soluble; in amounts recommended in soil reports from a qualified testing agency. B. Commercial Fertilizer: Commercial-grade complete fertilizer of neutral character, consisting of fast- and slow-release nitrogen, 50 percent derived from natural organic sources of urea formaldehyde, phosphorous, and potassium in the following composition: 1. Composition: Nitrogen, phosphorous, and potassium in amounts recommended in soil reports from a qualified testing agency. C. Slow-Release Fertilizer: Granular or pelleted fertilizer consisting of 50 percent water-insoluble nitrogen, phosphorus, and potassium in the following composition: 1. Composition: Nitrogen, phosphorous, and potassium in amounts recommended in soil reports from a qualified testing agency. PART 3 - EXECUTION 3.1 GENERAL A. Place planting soil and fertilizers according to requirements in other Specification Sections. B. Verify that no foreign or deleterious material or liquid such as paint, paint washout, concrete slurry, concrete layers or chunks, cement, plaster, oils, gasoline, diesel fuel, paint thinner, turpentine, tar, roofing compound, or acid has been deposited in planting soil. 3.2 EXAMINATION OF SUBGRADE A. The subgrade shall be examined by the Contractor prior to the start of subgrade preparation, soil placement and planting. Any deficiencies shall be noted and relayed to the Landscape architect in writing prior to acceptance of the subgrade by the Landscape Contractor. Deficiencies include, but shall not be limited to: 1. Construction debris present within the planting areas. 2. The subgrade is at incorrect depths for installing the designed soil profile and drainage layer. 3. Incomplete irrigation and/or subsurface drainage installation. 4. Incomplete lighting and exterior electrical installation. 5. Conflict with underground utilities. 6. Subgrade contaminated with oils, compressible material, silt or clay. 7. Subgrade must infiltrate water at the rate of at least one inch per hour. 3.3 PREPARATION OF UNAMENDED, ON-SITE SOIL BEFORE AMENDING A. Excavation: Excavate soil from designated area(s) to a depth of 6 inches (150 mm) and stockpile until amended. BETA Technologies B3 Facility South Burlington, VT Wagner Hodgson Landscape Architecture 03/11/2022 SOIL PREPARATION 329113 - 9 B. Unacceptable Materials: Clean soil of concrete slurry, concrete layers or chunks, cement, plaster, building debris, oils, gasoline, diesel fuel, paint thinner, turpentine, tar, roofing compound, acid, and other extraneous materials that are harmful to plant growth. C. Unsuitable Materials: Clean soil to contain a maximum of 8 percent by dry weight of stones, roots, plants, sod, clay lumps, and pockets of coarse sand. D. Screening: Pass unamended soil through a 2-inch (50-mm) sieve to remove large materials. 3.4 PLACING AND MIXING PLANTING SOIL OVER EXPOSED SUBGRADE A. General: Apply and mix unamended soil with amendments on-site to produce required planting soil. Do not apply materials or till if existing soil or subgrade is frozen, muddy, or excessively wet. B. Subgrade Preparation: Till subgrade to a minimum depth of 8 inches (200 mm). Remove stones larger than 2 inches (50 mm) in any dimension and sticks, roots, rubbish, and other extraneous matter and legally dispose of them off Owner's property. C. Mixing: Spread unamended soil to total depth as identified by plant type in Section 329300 “Plants”, but not less than required to meet finish grades after mixing with amendments and natural settlement. Do not spread if soil or subgrade is frozen, muddy, or excessively wet. 1. Amendments: Apply soil amendments and fertilizer, if required, evenly on surface, and thoroughly blend them with unamended soil to produce planting soil. a. Mix lime and sulfur, if required, with dry soil before mixing fertilizer. b. Mix fertilizer with planting soil no more than seven days before planting. c. Mix compost with top 8-12” of planting soil. 2. Lifts: Apply planting soil in lifts not exceeding 8 inches (200 mm) in loose depth for material compacted by compaction equipment, and not more than 4 inches (100 mm) in loose depth for material compacted by hand-operated tampers. A. Compaction: Compact each lift of planting soil to 75 percent of maximum Standard Proctor density according to ASTM D698 except where a different compaction value is indicated on Drawings. B. Finish Grading: Grade planting soil to a smooth, uniform surface plane with loose, uniformly fine texture. Roll and rake, remove ridges, and fill depressions to meet finish grades. 3.5 PLACING MANUFACTURED PLANTING SOIL OVER EXPOSED SUBGRADE A. General: Apply manufactured soil on-site in its final, blended condition. Do not apply materials or till if existing soil or subgrade is frozen, muddy, or excessively wet. B. Subgrade Preparation: Till subgrade to a minimum depth of 8 inches (200 mm). Remove stones larger than 2 inches (50 mm) in any dimension and sticks, roots, rubbish, and other extraneous matter and legally dispose of them off Owner's property. BETA Technologies B3 Facility South Burlington, VT Wagner Hodgson Landscape Architecture 03/11/2022 SOIL PREPARATION 329113 - 10 C. Application: Spread planting soil to total depth as identified by plant type in Section 329300 “Plants”., but not less than required to meet finish grades after natural settlement. Do not spread if soil or subgrade is frozen, muddy, or excessively wet. 1. Lifts: Apply planting soil in lifts not exceeding 8 inches (200 mm) in loose depth for material compacted by compaction equipment, and not more than 4 inches (100 mm) in loose depth for material compacted by hand-operated tampers. D. Compaction: Compact each lift of planting soil to 75 percent of maximum Standard Proctor density according to ASTM D698 except where a different compaction value is indicated on Drawings. E. Finish Grading: Grade planting soil to a smooth, uniform surface plane with loose, uniformly fine texture. Roll and rake, remove ridges, and fill depressions to meet finish grades. 3.6 BLENDING PLANTING SOIL IN PLACE A. General: Mix amendments with in-place, unamended soil to produce required planting soil. Do not apply materials or till if existing soil or subgrade is frozen, muddy, or excessively wet. B. Preparation: Till unamended, existing soil in planting areas to a minimum depth as identified by plant type in Section 329300 “Plants”. Remove stones larger than 2 inches (50 mm) in any dimension and sticks, roots, rubbish, and other extraneous matter and legally dispose of them off Owner's property. C. Mixing: Apply soil amendments and fertilizer, if required, evenly on surface, and thoroughly blend them into full depth of unamended, in-place soil to produce planting soil. 1. Mix lime and sulfur, if required, with dry soil before mixing fertilizer. 2. Mix fertilizer with planting soil no more than seven days before planting. 3. Mix compost with top 8-12” of planting soil. D. Compaction: Compact blended planting soil to 75 percent of maximum Standard Proctor density according to ASTM D698 except where a different compaction value is indicated on Drawings. E. Finish Grading: Grade planting soil to a smooth, uniform surface plane with loose, uniformly fine texture. Roll and rake, remove ridges, and fill depressions to meet finish grades. 3.7 PROTECTION AND CLEANING A. Protection Zone: Identify protection zones according to Section 015639 "Temporary Tree and Plant Protection." B. Protect areas of in-place soil from additional compaction, disturbance, and contamination. Prohibit the following practices within these areas except as required to perform planting operations: 1. Storage of construction materials, debris, or excavated material. 2. Parking vehicles or equipment. 3. Vehicle traffic. BETA Technologies B3 Facility South Burlington, VT Wagner Hodgson Landscape Architecture 03/11/2022 SOIL PREPARATION 329113 - 11 4. Foot traffic. 5. Erection of sheds or structures. 6. Impoundment of water. 7. Excavation or other digging unless otherwise indicated. C. Remove surplus soil and waste material including excess subsoil, unsuitable materials, trash, and debris and legally dispose of them off Owner's property unless otherwise indicated. 1. Dispose of excess subsoil and unsuitable materials on-site as directed by Owner. END OF SECTION 329113