SOW 540-23-104 Repair Hillside Slip - Copy - Copy.docx

SCOPE OF WORK

1. PROJECT DATA:

a. TITLE: “Repair Hillside Slip”

b. BUILDING/FACILITY: LAJVAMC Exterior Campus

c. PROJECT NO: 540-23-104

d. CONSTRUCTION DURATION: 90 Days after Notice to Proceed

2. GENERAL SCOPE:

This project shall consist of designing, furnishing, and installing Geopier SRT Plate Piles to the lines and grades designated on the project plans and as specified herein. Contractor shall completely prepare site for building operations, including demolition and removal of existing structures, and furnish labor and materials and perform work for the Hillside Slip Project for the VA Medical Center Clarksburg, WV 26301 (VA Project #540-23-104) as required by drawings and specifications. Bidders are strongly encouraged to visit the site prior to submitting a bid. The VA will schedule and advertise an organized site visit for bidders. The VA will not conduct individual site visits. Offices of CB Design Group, Inc., as Architect-Engineers, will render certain technical services during construction. Such services shall be considered as advisory to the Government and shall not be construed as expressing or implying a contractual act of the Government without affirmations by Contracting Officer or his duly authorized representative. The project shall occur outside and adjacent to an active medical center, and the contractor shall comply with all infection prevention measures as described below.

All work must be completed within 90 calendar days, beginning on the day of the Notice to Proceed and concluding upon final cleaning and VA occupancy. Work hours shall be 7:00 am – 7:00 pm (workdays and hours may be flexible). Coordinate with COR for each area and sequence of work. Requests for work outside of these days/times shall be made to the Contracting Officer’s Representative at least 72 hours in advance.

The project will be solicited in its entirety. The bid shall include:

1) GENERAL CONSTRUCTION: Work includes all general construction, alterations, roads, walks, grading, drainage, and necessary removal of existing structures and construction and certain other items as described in the project’s Contract Drawings and Specifications.

2) SITE SPECIFIC MOBILIZATION PLAN: Site specific mobilization plan shall include construction equipment access plan and site drainage maintenance plan. Bid shall include all costs associated with the mobilization plan, equipment access, and site drainage maintenance. Costs associated with alterations to mobilization plan, equipment access plan, and site drainage maintenance plan made after contract award shall be borne by contractor at no additional cost to the government.

3) WVDOH PERMITTING AND TRAFFIC CONTROL PLAN: The contractor is responsible for obtaining all permits required to complete the work. Use of public roadways and rights-of-way MUST be coordinated by general contractor with WVDOH and the VA PRIOR to commencement of the work. Bid shall include costs for permitting as well as costs for implementation of associated traffic control plan per WVDOH Manual on Temporary Traffic Control for Streets and Highways (latest edition).

a) Contact at WVDOH:

i) Michael Davis, Michael.r.davis@wv.gov Contractor will be responsible to coordinate and schedule work to minimize duration of any shutdowns. Construction Phasing may be required to ensure access to the building’s grounds, lots, and entrance points at all times for facility’s fire protection requirements and to meet the requirements of regulatory codes, laws, etc. All work pertaining to the first phase of work shall be completed and accepted by the VA prior to approval to begin work in the second phase Class I Infection Prevention measures shall be implemented and maintained as required throughout the duration of work. The Contractor is required to inspect and maintain infection prevention measures at all times.

The work includes all new materials, equipment, supervision, and personnel necessary to accomplish the job as shown on the drawings. Perform work specified herein and comply with VA specifications and VA regulations, procedures, and conditions for work at the medical center, including any applicable codes as per requirements of all governing agencies. The contractor shall be responsible for all labor, supervision, materials, equipment, and tools necessary to complete this work. The General Contractor is responsible for assuring that all sub-contractors working on the project and their employees also comply with these regulations. The contractor shall inspect the work area daily and secure all tools for patient and visitor safety.

The VA reserves the right to close or shut down the project site and order General Contractor’s employees off the premises in the event of a national emergency. The General Contractor may return to the site only with the written approval of the Contracting Officer.

3. GENERAL CONDITIONS AND DEFINITIONS:

4) COR: Contracting Officer’s Representative. V.A. employee of VAMC Facilities and Engineering Service officially assigned to act as Project Manager and Inspector on behalf of VAMC and Contracting Officer. COR shall be “First Point of Contact” on all matters concerning contract work for subject Project.

5) Coordinate all administrative and construction requirements exclusively with or through assigned COR of VAMC Facilities and Engineering Service; neither discuss contract work with, nor take any directives concerning contract work from any other person than CO unless specifically permitted and authorized to do so.

6) PROVIDE: Whenever used throughout Scope of Work, term “Provide” is to be understood to mean -Purchase newly manufactured; Furnish delivered to VAMC work site in protective containers; Secure from tampering or theft; and Install in accordance with Contract Scope of Work, Drawings, Specifications, and Manufacturer’s Instructions all required items of administrative submittals, labor, demolition, construction, equipment items, and installation works for entirety of Contract.

7) Definition of Terms Remove and Demolish with respect to subject project work:

a) Remove - shall be understood to mean that existing object or system shall be carefully disassembled or dismounted in serviceable condition, without being damaged, shall remain VAMC property, and be either turned-over to VAMC, or stored as directed, all with intention of remounting or reusing item again in future.

b) Demolish - shall be understood to mean that existing object or system shall be carefully broken-up or torn-down, using most conservative demolition methods possible, all to avoid causing excessive dust or noise in hospital environment. Demolished objects or systems shall no longer remain VAMC property and shall be hauled away from VAMC on same day as demolition, and disposed of in accordance with Federal, State, and Local Statutes.

8) Unless specified otherwise, all electrical work shall be done in accordance with NFPA, National Fire Codes (NFC) Standard 70, National Electrical Code (NEC), and related NFC electrical codes.

9) Contractor shall seal drilled holes with NFPA approved fire-stopping caulking. Caulking work will be approved by VA fire safety officer before project is considered complete. Contractor to seal all penetrations in walls and ceilings affected by demolition/construction work.

10) All electrical work such as pulling-in of wires and cables, circuit-breaker work, installing electrical devices and disconnect switches, working in electrical panels, and making of all electrical connections shall be done by certified electrical journeymen, known, and formally documented to be qualified in and experienced in electrical work.

11) Coordinate all mid-day utility shutdowns with VA COR with at least 2 weeks’ notice. Coordinate all after-hours utility shutdowns with VA COR with at least 72 hours’ notice.

12) Remove all debris and clean work site immediately upon completion of the work shift.

13) Establish an execution plan to ensure there are no disruptions of patient activities. Coordinate with VA COR for the plan and execution procedures.

4. DETAILED REQUIREMENTS:

INFECTION PREVENTION

1) The Contractor shall adhere to requirements as stipulated in the Infection Control Risk Assessment (ICRA) form for Class I construction work. Infection Prevention measures shall be constructed and installed during work hours, and no construction work shall begin until approval is granted by the Contracting Officer’s Representative. ICRA Class I Infection Control Measures are below:

a. Perform work activity in a manner that does not create dust.

b. Immediately replace any ceiling tile, close access panels, etc., upon completion of work.

c. Any materials and equipment being brought into the facility must be free of contaminants and loose material.

d. Provide active means to control airborne dust from dispersing into occupied areas and/or water mist surface to control dust.

2) Clean loose tools and equipment in work site at the conclusion of each activity. If dirt or debris resulting from contract work is tracked outside the work site, absolve and remediate immediately. Cleaning equipment will not be provided by the VA. Transport all materials using a tightly sealed container.

3) Construction areas must be inspected by an infection preventionist and engineering representative (and others as determined by the facility) for final activity/project close out and removal of infection prevention and control measures.

a. Work Area Cleaning:

i. Clean work areas including all environmental surfaces, high horizontal surfaces, and flooring materials.

ii. Check all nearby supply and return air registers for dust accumulation on upper surfaces as well as air diffuser surfaces.

e. HVAC Systems:

i. Remove isolation of HVAC system in areas where work is being performed. Verify that HVAC systems are clean and operational.

ii. Verify the HVAC systems meet original airflow and air exchange design specifications.

f. Water systems:

i. Until the potable water system is activated and in use, flushing shall continue at least twice per week in accordance with VHA Directive 1061.

DEMOLITION

1) All demolished materials shall become property of the Contractor and shall be disposed of by them off government property daily. VA dumpsters may not be used.

2) All demolition work shall be done in accordance with the Scope of Work. Coordinate with VA COR for any special requirements or discrepancies.

3) For all items scheduled for demolition:

a. Coordinate with owner's representative regarding which items are to be protected, salvaged, and/or discarded.

4) Scheduling & sequencing of the work:

a. Prior to commencement of any work on the project, the contractor shall meet with the owner's representative and a representative of the "end user" to discuss and formulate a scheduling/sequencing of the work plan to minimize the disruption of ongoing services/activities within the areas of the work. Before commencement of the work the contractor shall develop a written plan of scheduling/sequencing indicating target dates for certain phases on the work and associated selective demolition provide copies to owner’s representative, end user and architect.

5) Contractor shall provide coordination drawings after the demolition work. Provide all systems in coordination with the site conditions as part of this contract. Maintain continuity of HVAC, plumbing, and electrical systems etc.

6) Under no circumstance shall the work performed under this contract adversely affect adjacent areas not part of this contract.

7) Maintain existing systems as necessary to continue normal operations. All service interruptions shall be at owner's convenience. Requests for service interruptions occurring during Medical Center service hours shall be made a minimum of 14 days prior to anticipated date; Requests for service interruptions occurring outside of Medical Center service hours shall be made a minimum of 72 hours prior to anticipated date.

8) If suspected asbestos-containing materials are encountered in the course of the work, the contractor shall cease work with the suspect material and await direction from the COR.

9) All demolished equipment and rubbish shall be cleared, transported, and disposed of in a lawful and responsible manner. All materials removed from the property shall be disposed of at a legally approved site, for the specific materials, and all removals shall be in accordance with all applicable Federal, State, and local regulations. No burning of materials is permitted onsite.

CONSTRUCTION

1) The Contractor shall confine all operations (including storage of materials) on Government premises to areas authorized or approved by the Contracting Officer. The Contractor shall hold and save the Government, its officers, and agents, free and harmless from liability of any nature occasioned by the Contractor's performance.

2) Temporary buildings (e.g., storage sheds, shops, offices) and utilities may be erected by the Contractor only with the approval of the Contracting Officer and shall be built with labor and materials furnished by the Contractor without expense to the Government. The temporary buildings and utilities shall remain the property of the Contractor and shall be removed by the Contractor at its expense upon completion of the work. With the written consent of the Contracting Officer, the buildings and utilities may be abandoned and need not be removed.

3) The Contractor shall, under regulations prescribed by the Contracting Officer, use only established roadways, or use temporary roadways constructed by the Contractor when and as authorized by the Contracting Officer. When materials are transported in prosecuting the work, vehicles shall not be loaded beyond the loading capacity recommended by the manufacturer of the vehicle or prescribed by any Federal, State, or local law or regulation. When it is necessary to cross curbs or sidewalks, the Contractor shall protect them from damage. The Contractor shall repair or pay for the repair of any damaged curbs, sidewalks, or roads.

4) Suggested working space and space available for storing materials is shown on the drawings and shall be confirmed by the COR.

5) Execute work in such a manner as to interfere as little as possible with work being done by others. Keep roads clear of construction materials, debris, standing construction equipment and vehicles at all times.

6) Execute work to interfere as little as possible with normal functioning of the Medical Center as a whole, including operations of utility services, fire protection systems and any existing equipment, and with work being done by others. Use of equipment and tools that transmit vibrations and noises through the building structure, are not permitted in buildings that are occupied, during construction, jointly by patients or medical personnel, and Contractor's personnel, except as permitted by COR where required by limited working space.

a. Do not store materials and equipment in other than assigned areas.

b. Schedule delivery of materials and equipment to immediate construction working areas within buildings in use by Department of Veterans Affairs in quantities sufficient for not more than two workdays. Provide unobstructed access to Medical Center areas required to remain in operation.

c. Where access by Medical Center personnel to vacated portions of buildings is not required, storage of Contractor's materials and equipment will be permitted subject to fire and safety requirements.

7) The Medical Center must maintain its operation 24 hours a day 7 days a week. Therefore, any interruption in service must be scheduled and coordinated with the COR to ensure that no lapses in operation occur. It is the CONTRACTOR'S responsibility to develop a work plan and schedule detailing, at a minimum, the procedures to be employed, the equipment and materials to be used, the interim life safety measure to be used during the work, and a schedule defining the duration of the work with milestone subtasks.

8) To ensure such executions, Contractor shall furnish the COR with a schedule of approximate dates on which the Contractor intends to accomplish work in each specific area of site, building or portion thereof. In addition, Contractor shall notify the COR two weeks in advance of the proposed date of starting work in each specific area of site, building or portion thereof. Arrange such dates to ensure accomplishment of this work in successive phases mutually agreeable to COR and Contractor.

9) Preconstruction Submittals

a. Accident Prevention Plan (APP);

b. Site Specific Mobilization Plan (to include construction equipment access plan and site drainage maintenance plan);

c. WVDOH Approved Traffic Control Plan;

d. WVDOH Approved Right of Way Entry Permit Application

e. Environmental Protection Plan

f. Erosion and Sediment Control Plan

10) During the construction period through completion, provide photographic documentation of construction progress and at selected milestones, storage, and remote access to the documentation, as per the specifications. Before construction, the building pad, adjacent streets, roadways, parkways, driveways, curbs, sidewalks, landscaping, adjacent utilities, and adjacent structures surrounding the building pad and site shall be documented. Overlapping photographic techniques shall be used to ensure maximum coverage.

11) Construction Fence: Before construction operations begin, Contractor shall provide a chain link construction fence, 2.1m (seven feet) minimum height, around the construction area indicated on the drawings. Provide gates as required for access with necessary hardware, including hasps and padlocks. Fasten fence fabric to terminal posts with tension bands and to line posts and top and bottom rails with tie wires spaced at maximum 375mm (15 inches). Bottom of fences shall extend to 25mm (one inch) above grade. Remove the fence when directed by COR.

12) Provide a Safety Sign where directed by COR. Face of sign shall be 19 mm (3/4 inch) thick exterior grade plywood. Provide two 100 mm by 100 mm (four by four inch) posts extending full height of sign and 900 mm (three feet) into ground. Set bottom of sign level at 1200 mm (four feet) above ground.

13) To minimize interference of construction activities with flow of Medical Center traffic, comply with the following:

a. Keep roads, walks and entrances to grounds, to parking and to occupied areas of buildings clear of construction materials, debris and standing construction equipment and vehicles.

b. Method and scheduling of required cutting, altering and removal of existing roads, walks and entrances must be approved by the COR.

14) Survey: Before any work is started, the Contractor shall make a thorough survey with the COR of the area of work and areas which are anticipated routes of access, and furnish a report, signed by the Contracting Officer. This report shall list the area of work’s:

a. Existing conditions.

b. Existence and conditions of items required by drawings to be either reused or relocated, or both.

c. Shall note any discrepancies between drawings and existing conditions at site.

d. Shall designate areas for working space, materials storage and routes of access to areas within buildings where alterations occur and which have been agreed upon by Contractor and COR.

e. Perform survey on ground according to the latest version of “Minimum Standard Detail Requirements for ALTA/NSPS Land Title Surveys” and FGDC STD-007.3 and FGDC STD-007.4.

f. Determine project site contours at maximum 1 foot interval.

g. Determine spot elevations at specified locations.

h. Accuracy: The survey shall have an absolute horizontal accuracy of +/- 0.1 feet relative to the project coordinate system. The survey shall have an absolute vertical accuracy of +/- 0.1 feet relative to the project benchmarks. The survey shall have a relative vertical accuracy of +/- 0.05 feet between any two points within 100 feet of each other.

15) Re-Survey: One week before expected partial or final inspection date, the Contractor and COR together shall make a thorough resurvey of the areas of buildings involved. They shall furnish a report on conditions then existing, as compared with conditions of same as noted in first condition survey report:

a. Re-survey report shall also list any damage caused by Contractor to the area, despite protection measures; and will form basis for determining extent of repair work required of Contractor to restore damage caused by Contractor's workers in executing work of this contract.

16) Protection: Provide the following protective measures:

a. Temporary protection against damage for portions of existing structures and grounds where work is to be done, materials handled, and equipment moved and/or relocated.

b. Protect environmental resources within the project boundaries and those affected outside the limits of permanent work during the entire period of this contract. Confine activities to areas defined by the specifications and drawings.

c. Prior to construction, identify all land resources to be preserved within the work area. Do not remove, cut, deface, injure, or destroy land resources including trees, shrubs, vines, grasses, topsoil, and landforms without permission from the COR. Do not fasten or attach ropes, cables, or guys to trees for anchorage unless specifically authorized, or where special emergency use is permitted. Provide erosion control plans, in phases where required. Unless otherwise noted, all vegetative and structural erosion and sediment control measures are to be constructed and maintained in strict compliance with the latest edition of the West Virginia Erosion and Sediment Control Best Management Practice Manual and applicable Federal, State, and Local regulations.

d. Plan and conduct earthwork to minimize the duration of exposure of unprotected soils. Clear areas in reasonably sized increments only as needed to use. Form earthwork to final grade as shown. Immediately protect side slopes and back slopes upon completion of rough grading.

e. Construct diversion ditches, benches, and berms to retard and divert runoff from the construction site to protected drainage areas approved under paragraph 208 of the Clean Water Act.

17) If any direct or indirect damage is done to public or private property resulting from any act, omission, neglect, or misconduct, the Contractor shall restore the damaged property to a condition equal to that existing before the damage at no additional cost to the Government. Repair, rebuild, or restore property as directed or make good such damage in an acceptable manner.

18) Subsurface conditions have been developed by core borings and test pits. Logs of subsurface exploration are shown diagrammatically on drawings and in a separate pdf.

19) A registered professional land surveyor or registered civil engineer whose services are retained and paid for by the Contractor shall perform services specified herein and in other specification sections. The Contractor shall certify that the land surveyor or civil engineer is not one who is a regular employee of the Contractor, and that the land surveyor or civil engineer has no financial interest in this contract.

20) Establish and plainly mark the corner of the existing adjacent building, lines for each control monument, and such other lines and grades that are reasonably necessary to properly assure that location, orientation, and elevations established for piles are in accordance with lines and elevations shown on contract drawings.

21) Following completion of general mass excavation and before any other permanent work is performed, establish and plainly mark (through use of appropriate batter boards or other means) sufficient additional survey control points or system of points as may be necessary to assure proper alignment, orientation, and grade of all major features of work. Survey shall include, but not be limited to, location of lines and grades of footings, exterior walls, concrete pads, and major utilities.

22) During progress of work, and particularly as work progresses along hillside, Contractor shall have line grades checked and certified by a registered land surveyor or registered civil engineer as meeting requirements of contract drawings. Furnish such certification to the COR before piles are placed. In addition, Contractor shall furnish to the COR certificates from a registered land surveyor or registered civil engineer that the following work is complete in every respect as required by contract drawings.

a. Location of slip area

b. Locations and elevations of plate piles.

23) Whenever changes from contract drawings are made in line or grading requiring certificates, record such changes on a reproducible drawing bearing the registered land surveyor or registered civil engineer seal, and forward these drawings upon completion of work to COR.

24) The contractor shall maintain two full size sets of as-built drawings and electronic pdf copies which will be kept current during construction of the project, to include all contract changes, modifications, and clarifications.

25) The following specification sections are identified as related work for excavation:

a. Materials testing and inspection during construction: Section 01 45 29, TESTING LABORATORY SERVICES.

b. Safety requirements : Section 00 72 00, GENERAL CONDITIONS, Article, ACCIDENT PREVENTION.

c. Protection of existing utilities, fire protection services, existing equipment, roads, and pavements: Section 01 00 00, GENERAL REQUIREMENTS.

d. Subsurface Investigation: Section 01 00 00, GENERAL REQUIREMENTS, Article, PHYSICAL DATA.

e. Erosion Control: Section 01 57 19, TEMPORARY ENVIRONMENTAL CONTROLS, and Section 32 90 00, PLANTING.

f. Site preparation: Section 31 23 19, DEWATERING

26) The expanded footprint of the fill areas should be well-defined, including the limits of the fill zones at the time of fill placement. Grade control should be maintained throughout the fill placement operations. All fill operations should be observed on a full-time basis by a qualified soil technician to determine that the specified compaction requirements are being met. A minimum of one compaction test per 500 square feet of area should be tested in each lift placed. The elevation and location of the tests should be clearly identified at the time of fill placement.

27) Strip topsoil from within limits of earthwork operations as specified. Topsoil shall be a fertile, friable, natural topsoil of loamy character and characteristic of locality. Topsoil shall be capable of growing healthy horticultural crops of grasses. Stockpile topsoil and protect as directed by Resident Engineer. Eliminate foreign materials, such as weeds, roots, stones, subsoil, frozen clods, and similar foreign materials larger than 0.014 m3 (1/2 cubic foot) in volume, from soil as it is stockpiled. Retain topsoil on station. Remove foreign materials larger than 50 mm (2 inches) in any dimension from topsoil used in final grading. Topsoil work, such as stripping, stockpiling, and similar topsoil work shall not, under any circumstances, be carried out when soil is wet so that the composition of the soil will be destroyed.

28) Lines and Grades: Registered Professional Land Surveyor or Registered Civil Engineer, specified in Section 01 00 00, GENERAL REQUIREMENTS, shall establish lines and grades.

a. Grades shall conform to elevations indicated on plans within the tolerances herein specified. Generally, grades shall be established to provide a smooth surface, free from irregular surface changes. Grading shall comply with compaction requirements and grade cross sections, lines, and elevations indicated. Where spot grades are indicated the grade shall be established based on interpolation of the elevations between the spot grades while maintaining appropriate transition at structures and paving and uninterrupted drainage flow into inlets.

b. Locations of existing and proposed elevations indicated on plans, except spot elevations, are from a site survey that measured spot elevations and subsequently generated existing contours and spot elevations. Proposed spot elevations and contour lines have been developed utilizing the existing conditions survey and developed contour lines and may be approximate. Contractor is responsible to notify Resident Engineer of any differences between existing elevations shown on plans and those encountered on site by Surveyor/Engineer described above. Notify Resident Engineer of any differences between existing or constructed grades, as compared to those shown on the plans.

c. After establishment of lines and grades, Contractor will be responsible for any additional cut and/or fill required to ensure that site is graded to conform to elevations indicated on plans.

d. Finish grading is specified in Section 32 90 00, PLANTING.

29) Subgrade Protection: Protect subgrades from softening, undermining, washout, or damage by rain or water accumulation. Reroute surface water runoff from excavated areas and not allow water to accumulate in excavations. Do not use excavated trenches as temporary drainage ditches. When subgrade for foundations has been disturbed by water, remove disturbed material to firm undisturbed material after water is brought under control. Replace disturbed subgrade in trenches with concrete or material approved by the Resident Engineer.

30) Proofrolling: After rough grade has been established in cut areas and prior to placement of fill in fill areas, proofroll exposed subgrade with a fully loaded dump truck to check for pockets of soft material. Considering the location of the site and understanding that proofrolling may be difficult, at a minimum, the stripped subgrade should be evaluated by the Geotechnical Engineer or approved testing agency using visual observation, DCP, and/or probe methods, etc., prior to new fill placement. Proof rolling shall be done on an exposed subgrade free of surface water (wet conditions resulting from rainfall) which would promote degradation of an otherwise acceptable subgrade. Notify the Resident Engineer a minimum of 3 days prior to proof rolling. Proof rolling shall be performed in the presence of the Resident Engineer. Rutting or pumping of material shall be undercut as directed by the Resident Engineer and replaced with fill and backfill material. Maintain subgrade until succeeding operation has been accomplished.

31) Site Earthwork: Earth excavation includes excavating obstructions visible on surface; and other items indicated to be removed; together with soil, boulders, and other materials not classified as rock or unauthorized excavation. Excavation shall be accomplished as required by drawings and specifications. Excavate to indicated elevations and dimensions within a tolerance of plus or minus 25 mm (1 inch). Extend excavations a sufficient distance from structures for placing and removing concrete formwork, for installing services and other construction, complying with OSHA requirements, and for inspections. Remove subgrade materials that are determined by Resident Engineer as unsuitable and replace with acceptable material. If there is a question as to whether material is unsuitable or not, the contractor shall obtain samples of the material, under the direction of the Resident Engineer, and the materials shall be examined by an independent testing laboratory for soil classification to determine whether it is unsuitable or not. When unsuitable material is encountered and removed, contract price and time will be adjusted in accordance with Articles, DIFFERING SITE CONDITIONS, CHANGES and CHANGES-SUPPLEMENT of the GENERAL CONDITIONS as applicable. Adjustments to be based on volume in cut section only.

a. Site Grading:

i. Provide a smooth transition between adjacent existing grades and new grades.

ii. Cut out soft spots, fill low spots, and trim high spots to comply with required surface tolerances.

iii. Slope grades to direct water away from buildings and to prevent ponds from forming where not designed.

32) Filling and Backfilling: Do not fill or backfill until all debris, water, unsatisfactory soil materials, obstructions, and deleterious materials have been removed from excavation. For fill and backfill, use excavated materials, and borrow meeting the criteria specified herein, as applicable. Borrow will be supplied at no additional cost to the Government. Do not use unsuitable excavated materials.

a. Placing: Place materials in horizontal layers not exceeding 200 mm (8 inches) in loose depth for material compacted by heavy compaction equipment, and not more than 100 mm (4 inches) in loose depth for material compacted by hand-operated tampers and then compacted. Place no material on surfaces that are muddy, frozen, or contain frost.

b. Compaction: Compaction equipment suitable to the soil type used as fill should be used to compact the fill material. Theoretically, any equipment type can be used if the required density is achieved. Ideally, a smooth, steel drum roller would be most efficient for compacting and sealing the surface soils. All areas receiving fill should be graded to facilitate positive drainage of any free water associated with precipitation and surface runoff. If a smooth-drum roller is utilized, the surface of each completed lift should be scarified prior to the placement of the next lift of fill to reduce the potential for the creation of slippage planes within the fill mass.

33) Dewatering: The work to be completed by the Contractor includes, but is not necessarily limited to the following:

a. Implementation of the Erosion and Sedimentation Control Plan

b. Dewater excavations, including seepage and precipitation

i. Dewatering system shall be of sufficient size and capacity necessary to lower and maintain ground water table to an elevation at least 300 mm (1 foot) below lowest planned excavation and to allow material to be excavated in a reasonably dry condition. Materials to be removed shall be sufficiently dry to permit excavation to grades shown and to stabilize excavation slopes where sheeting is not required. Operate dewatering system continuously until backfill work has been completed.

ii. Reduce hydrostatic head below any excavation to the extent that water level in the construction area is a minimum of 300 mm (1 foot) below prevailing excavation surface.

iii. Prevent loss of fines, seepage, boils, quick conditions or softening of foundation strata.

iv. The site should be graded such that surface water runoff is directed away from the excavations. The surface of the site should be kept properly graded in order to enhance drainage of the surface water away from the proposed foundation areas during the construction phase.

v. The surficial soils contain fines which are considered moderately to highly erodible. The Contractor should provide and maintain positive site drainage during earthwork operations to help maintain the integrity of the surficial soils. All erosion and sedimentation shall be controlled in accordance with sound engineering practice and current local requirements.

vi. Maintain stability of sides and bottom of excavation.

vii. Construction operations are performed in the dry.

viii. Control of surface and subsurface water is part of dewatering requirements. Maintain adequate control so that:

1. The stability of excavated and constructed slopes are not adversely affected by saturated soil, including water entering prepared subbase and subgrades where underlying materials are not free draining or are subject to swelling or freeze-thaw action.

2. Erosion is controlled.

3. Flooding of excavations or damage to structures does not occur.

4. Surface water drains away from excavations.

5. Excavations are protected from becoming wet from surface water, or ensure excavations are dry before additional work is undertaken.

ix. Permitting Requirements: The contractor shall comply with and obtain the required State and County permits where the work is performed.

c. The Contractor shall be responsible for providing all materials, equipment, labor, and services necessary for care of water and erosion control. Excavation work shall not begin before the Erosion and Sedimentation Control Plan is in place.

d. Install a dewatering system to lower and control ground surface water in order to permit excavation and placement of backfill materials to be performed under dry conditions. Make the dewatering system adequate to pre-drain the water-bearing strata above and below the bottom of planned excavations.

e. In addition, reduce hydrostatic pressure head in water-bearing strata below structure foundations, utility lines, and other excavations, to extent that water levels in construction area are a minimum of 300 mm (1 foot) below prevailing excavation surface at all times.

34) Geopier SRT Plate Pile Installation: Provision of all equipment, material, labor, and supervision to design and install SRT Plate Pile elements. Design shall rely on subsurface information presented in the project geotechnical report. Layout of SRT Plate Piles elements, spoil removal (as required), and subgrade preparation following SRT Plate Pile installation is not included by the installer and must be provided by the General Contractor.

a. The SRT Plate Piles design and installation shall adhere to all methods and standards described in the relevant Specification.

b. The SRT Plate Piles Installer (the Installer) shall be approved by Geopier Foundation Company, Inc. Without exception, no alternate installer will be accepted. Contractor must contact Geopier for list of approved vendors.

i. Where specifications and reference documents conflict, the SRT Plate Piles Designer shall make the final determination of the applicable document.

ii. Plate Piles: Refer to reference documents “Construction and Quality Control Procedures for Geopier SRT-2® Slope Stabilization System.” Tensar® Geopier® Foundations, 3-9-2021 and Geopier SRT® System: Licensee Guidelines 2019, Tensar® Geopier®, 2019.

iii. The design life of the structure shall be 100 years.

c. Design Calculations – The Installer shall submit detailed design calculations and construction drawings prepared by the SRT Plate Piles Designer (the Designer) review and approval by the Design Architect/Engineer. All plans shall be sealed by a Professional Engineer in the State in which the project is constructed.

d. The Installer shall submit detailed design calculations, construction drawings, and shop drawings, (the Design Submittal), for approval by the Design Architect/Engineer at least 2 week(s) prior to the beginning of construction. A detailed explanation of the design parameters for settlement calculations shall be included in the Design Submittal. Additionally, the quality control test program for the SRT Plate Pile system, meeting these design requirements, shall be submitted. All computer-generated calculations and drawings shall be prepared and sealed by a Professional Engineer, licensed in the State where the piers are to be built. Submittals will be submitted electronically only unless otherwise required by specific submittal instructions.

e. The as-built center of each pile shall be within the allowable tolerance (per the reference documents) of the locations indicated on the plans. Piles installed outside of the allowable tolerances and deemed not acceptable shall be reinstalled at no additional expense to the Government.

f. The Installer shall have a full-time, on-site Control Technician to verify and report all installation procedures. The Installer shall immediately report any unusual conditions encountered during installation to the SRT Plate Piles Designer, the General Contractor, and to the Testing Agency.

i. The Testing Agency shall monitor the installation of SRT Plate Piles elements to verify that the production installation practices and installation depths are similar to those described within the reference documents and design submittals.

ii. The Testing Agency shall report any discrepancies to the Installer and General Contractor immediately.

g. The General Contractor shall locate and protect underground and aboveground utilities and other structures from damage during installation of the SRT Plate Piles elements.

h. Site grades for SRT Plate Piles installation shall be finished grade elevation. Ground elevations and finished floor elevations shall be provided to the SRT Plate Piles Installer in sufficient detail to estimate installation depth elevations to within 3 inches.

i. The General Contractor will provide site access to the Installer, after earthwork in the area has been completed. A working surface shall be established and maintained by the General Contractor to provide wet weather protection of the subgrade and to provide access for efficient operation of the SRT Plate Piles installation.

j. Prior to, during and following SRT Plate Piles installation, the General Contractor shall provide positive drainage to protect the site from wet weather and surface ponding of water.

k. If spoils are generated by SRT Plate Piles installation, spoil removal from the SRT Plate Piles work area in a timely manner to prevent interruption of SRT Plate Piles installation is required.

35) Planting: Examine areas to receive plants for compliance with requirements and conditions affecting installation and performance.

a. Verify that no materials that would inhibit plant growth are present in planting area. If such materials are present, remove soil and contaminants ad directed by Contracting Officer's Representative and provide new planting soil.

b. Do not mix or place soils and soil amendments in frozen, wet, or muddy conditions.

c. Suspend soil spreading, grading, and tilling operations if soil moisture becomes excessive. Resume soil preparations when moisture content returns to acceptable level.

d. If soil is excessively dry, not workable, and too dusty, moisten uniformly.

e. Special conditions may exist that warrant variance in specified planting dates or conditions. Submit written request to Contracting Officer’s Representative stating special conditions and proposed variance.

f. Install erosion control materials at all areas inside or outside limits of construction that are disturbed by planting operations. Provide erosion control and seeding with native plant species to protect slopes.

g. Verify location of underground utilities before excavation. Protect existing adjacent turf before excavations are made. Do not disturb topsoil and vegetation in areas outside those indicated on Drawings. Where planting beds occur in existing turf areas, remove turf to depth that will ensure removal of entire roof system. Measure depth of plant pits from finished grade. Provide depth of plant pit excavation and relation of top of root ball and finish grade as indicated on drawings. Install plant materials as specified in Article 3.8. Do not plant trees within 3 m (10 feet) of any utility lines or building walls.

h. For newly graded subgrades, loosen subgrade to minimum 8 inches deep. Remove stones larger than 25 mm (1 inch) in any dimension and sticks, roots, rubbish, and other extraneous matter and legally dispose of them off Government's property.

i. Apply fertilizer, lime, and soil amendments directly to subgrade before loosening, at rates recommended by soils analysis.

ii. Spread topsoil, apply soil amendments and fertilizer on surface, and thoroughly blend planting soil.

iii. Spread planting soil 150 mm (6 inches) deep but minimum required to meet finish grades after light rolling and natural settlement. Do not spread if planting soil or subgrade is frozen, muddy, or excessively wet.

1. Spread approximately 1/2 thickness of planting soil over loosened subgrade. Mix thoroughly into top 100 mm (4 inches) of subgrade. Spread remainder of planting soil.

2. Reduce elevation of planting soil to allow for soil thickness of sod.

iv. Finish grade planting areas to smooth, uniform surface plane with loose, uniformly fine texture. Grade to within plus or minus 13 mm (1/2 inch) of finish elevation. Roll and rake, remove ridges, and fill depressions to meet finish grades. Limit finish grading to areas that can be planted in immediate future.

36) Contractor shall provide qualified, factory-trained manufacturers' representatives to give detailed training to assigned Department of Veterans Affairs personnel in the operation and complete maintenance for each piece of equipment. All such training will be at the job site. These requirements are more specifically detailed in the various technical sections.

37) Upon completion of the work, the Contractor shall furnish the COR one electronic copy and reproducible drawings at the scale of the contract drawings, showing the finished grade on the grid developed for constructing the work. These drawings shall bear the seal of the registered land surveyor or registered civil engineer. Contractor shall deliver two approved completed sets of as-built drawings in the electronic version (scanned PDF) to the COR within 15 calendar days after each completed phase and after the acceptance of the project by the COR.

38) On completion of project and after removal of all debris, rubbish, and temporary construction, Contractor shall leave the construction area in a clean condition satisfactory to the COR. Cleaning shall include off the station disposal of all items and materials not required to be salvaged, as well as all debris and rubbish resulting from demolition and new work operations.

COMMISIONING & WARRANTY

1) Commissioning efforts should be coordinated by the general contractor with COR, shall include (at a minimum) the factory representatives for the equipment manufacturers, and the mechanical, civil, and/or environmental contractor.

2) Commissioning shall be in accordance with ASHRAE "guideline 1", latest version.

3) Pre-Warranty Conference: Prior to contract completion, and at a time designated by the Contracting Officer, the Contractor shall meet with the Contracting Officer to develop a mutual understanding with respect to the requirements of this section. Communication procedures for Contractor notification of construction warranty defects, priorities with respect to the type of defect, reasonable time required for Contractor response, and other details deemed necessary by the Contracting Officer for the execution of the construction warranty will be established/reviewed at this meeting. In connection with these requirements and at the time of the Contractor’s quality control completion inspection, furnish the name, telephone number and address of a licensed and bonded company which is authorized to initiate and pursue construction warranty work action on behalf of the Contractor. This point of contract will be located within the local service area of the warranted construction, be continuously available and be responsive to Government inquiry on warranty work action and status. This requirement does not relieve the Contractor of any of its responsibilities in conjunction with other portions of this provision.

4) Warranty Management Plan: Develop a warranty management plan which contains information relevant to FAR 52.246-21 Warranty of Construction in at least 30 days before the planned pre-warranty conference, submit four sets and electronic pdf copy of the warranty management plan. Include within the warranty management plan all required actions and documents to assure that the Government receives all warranties to which it is entitled. The plan must be in narrative form and contain sufficient detail to render it suitable for use by future maintenance and repair personnel, whether tradesman, or of engineering background, not necessarily familiar with this contract. The term “status” as indicated below must include due date and whether item has been submitted or was approved. Warranty information made available during the construction phase must be submitted to the Contracting Officer for approval prior to each monthly invoice for payment. Assemble approved information in a binder and turn over to the Government upon acceptance of the work. The construction warranty period will begin on the date of the project acceptance and continue for the product warranty period. A joint 4 month and 9 month warranty inspection will be conducted, measured from time of acceptance, by the Contactor and the Contracting Officer. Include in the warranty management plan, but not limited to, the following:

a. Roles and responsibilities of all personnel associated with the warranty process, including points of contact and telephone numbers within the company of the Contractor, subcontractors, manufacturers, or suppliers involved.

b. Furnish with each warranty the name, address, and telephone number of each of the guarantor’s representatives nearest project location.

c. Listing and status of delivery of all Certificates of Warranty for extended warranty items.

d. A list for each warranted equipment item, feature of construction or system indicating:

i. Name of item.

ii. Model and serial numbers.

iii. Location where installed.

iv. Name and phone numbers of manufacturers and suppliers.

v. Name and phone numbers of manufacturers or suppliers.

vi. Names, addresses and phone numbers of sources of spare parts.

vii. Warranties and terms of warranty. Include one-year overall warranty of construction, including the starting date of warranty of construction. Items which have extended warranties must be indicated with separate warranty expiration dates.

viii. Starting point and duration of warranty period.

ix. Summary of maintenance procedures required to continue the warranty in force.

x. Cross-reference to specific pertinent Operation and Maintenance manuals.

xi. Organizations, names, and phone numbers of persons to call for warranty service.

xii. Typical response time and repair time expected for various warranted equipment.

e. The plans for attendance at the 4 and 9-month post construction warranty inspections conducted by the government.

f. Procedure and status of tagging of all equipment covered by extended…