S--PAVING, FENCING, & TREE REMOVAL

CONTINUATION PAGE Louis A Johnson VAMC Statement of Work Requirements of material to be furnished and applicable specifications of fence installation: A. Contractor will provide all equipment, labor and material to remove and dispose of existing hand railing at the top of the retaining wall, and install new metallic fencing. Fence perimeter approx 125' by 7' height, w/ barbed wire top around all electrical equipment. Provide one 4'walk gate with panic hardware. The lock for the 4' walk gate should be able to accept a "Best" core. B. Fence material will meet the following specifications (VHA TIL Master Specification 32-31-13): 1) Materials shall conform to ASTM F1083 and ASTM A392 ferrous metals, zinc coated; and detailed specifications forming the various parts thereto; and other requirements specified herein. Zinc coat metal members (including fabric, gates, posts, rails, hardware and other ferrous metal items) after fabrication shall be reasonably free of excessive roughness, blisters and sal-ammoniac spots. 2) CHAIN LINK FABRIC: ASTM A392 9 gauge wire woven in a 50 mm (2 inch) mesh. Top and bottom selvage shall have twisted and barbed finish. Zinc coating weight shall be // 340 // 570 // grams/m2 (// 1.2 // 2.0 // ounces per square foot). 3) POST, FOR GATES AND FENCING: ASTM F1083, Grade SK-40A, round, zinc coated steel. Dimensions and weights of posts shall conform to the tables in the ASTM Specification. Provide post braces and truss rods for each gate, corner, pull or end post. Provide truss rods with turnbuckles or other equivalent provisions for adjustment. Note: Posts above the transformers need to be shallower than standard due to two fuel tanks. Post are to be concreted into place. 4) TOP RAIL AND BOTTOM RAIL: ASTM F1083, Grade SK-40A, round, zinc coated steel. Dimensions and weights of posts shall conform to the tables in the ASTM Specification; fitted with suitable expansion sleeves and means for securing rail to each gate, corner, and end posts. 5) TOP AND BOTTOM TENSION WIRE: ASTM A817 and ASTM F626, zinc coated, having minimum coating the same as the fence fabric. 6) ACCESSORIES: Accessories as necessary caps, rail and brace ends, wire ties or clips, braces and tension bands, tension bars, truss rods, and miscellaneous accessories conforming to ASTM F626 7) Barbed wire support arms: ASTM F626, single arm type, steel or malleable iron. 8) Barbed wire: ASTM A121, zinc coated steel wire and barbs; standard size and construction: 2.51 mm (0.099 inch) diameter line wire with 2.03 cm (0.080 inch) diameter, 2-point barbs. 9) GATE HARDWARE: Manufacturer's standard products, installed complete. The type of hinges shall allow gates to swing through 180 degrees, from closed to open position. Hang and secure gates in such a manner that, when locked, they cannot be lifted off hinges. Provide stops and keepers for all double gates. Latches shall have a plunger bar arranged to engage the center stop. Arrange latches for locking. Center stops shall consist of a device arranged to be set in concrete and to engage a plunger bar. Keepers shall consist of a mechanical device for securing the free end of the gate when in full open position. 10) CONCRETE: 1) ASTM C94/C94M, using 19 mm (3/4 inch) maximum size aggregate, and having minimum compressive strength of 25 mPa (3000 psig) at 28 days. Non shrinking grout shall consist of one part Portland cement to three parts clean, well graded sand, non shrinking grout additive and the minimum amount of water to produce a workable mix. D. Fence will be grounded in accordance with the following (VHA TIL Master Specification 26-05-26): : 1) Fences shall be grounded with a ground rod at each fixed gate post and at each corner post. 2) Drive ground rods until the top is 300 mm (12 inches) below grade. Attach a No. 4 AWG copper conductor by exothermic weld to the ground rods, and extend underground to the immediate vicinity of fence post. Lace the conductor vertically into 300 mm (12 inches) of fence mesh and fasten by two approved bronze compression fittings, one to bond the wire to post and the other to bond the wire to fence. Each gate section shall be bonded to its gatepost by a 3 mm x 25 mm (0.375 inch x 1 inch) flexible, braided copper strap and ground post clamps. Clamps shall be of the anti-electrolysis type. E. Final installation will conform to the requirements as outlined in VHA TIL Master Specification 32-31-13, and VHA TIL Master Specification 26-05-26 Requirements for replacement of existing concrete/asphalt area outside of Laundry: A. Contractor will remove and haul away existing concrete/ asphalt and base layers. Contractor will replace concrete and asphalt with a concrete pad. Area is to be replaced extends from the red stand pipe to the ramp from building to building.. Area is approximately 1400 Sq Ft. All work for the concrete pad is to take place during the weekend from 3pm Friday until 8am Monday morning. B. General: The Contractor shall retain and reimburse a testing laboratory to design a select sub base material mixture and submit a job mix formula to the Resident Engineer, in writing, for approval. The formula shall include the source of materials, gradation, plasticity index, liquid limit, and laboratory compaction curves indicating maximum density at optimum moisture. Concrete shall be Type C, air entrained as specified in Section 03 30 00, CAST-IN-PLACE CONCRETE, with the following exceptions: TYPE MAXIMUM SLUMP* Curb & Gutter 75 mm (3") Pedestrian Pavement 75 mm (3") Vehicular Pavement 50 mm (2") (Machine Finished) 100 mm (4") (Hand Finished) Equipment Pad 75 to 100 mm (3" to 4") * For concrete to be vibrated: Slump as determined by ASTM C143. Tolerances as established by ASTM C94. C. Reinforcement: 1. The type, amount, and locations of steel reinforcement shall be as shown on the drawings and in the specifications. 2. Welded wire fabric shall conform to AASHTO M55. 3. Dowels shall be plain steel bars conforming to AASHTO M31. Tie bars shall be deformed steel bars conforming to AASHTO M31. D. Sub base: 1. Sub base material shall consist of select granular material composed of sand, sand gravel, crushed stone, crushed or granulated slag, with or without soil binder, or combinations of these materials conforming to AASHTO M147, Grading E or F. 2. Materials meeting other gradations than that noted will be acceptable whenever the gradations are within a tolerance of three to five percent, plus or minus, of the single gradation established by the job mix formula. E. Installation of materials will be in accordance with TIL Master Specification 32-05-23 Cement and concrete for exterior improvements. F. Concrete is to be 6" of concrete 4000PSI. Requirements for replacement of existing asphalt driveway: A. Contractor will remove existing gravel driveway, re-compact the dirt before installing asphalt drive. It is to be replaced with approximately 3100 sq ft of new stone base, asphalt and coating. Asphalt drive is to go from the light pole to the hillside (currently a generator sit there to approx 10 ft beyond a sewer manhole stopping before the tree. B. GENERAL: Asphaltic base and asphalt concrete materials shall conform to the requirements of the following and other appropriate sections of the latest version of the State Highway Material Specifications, including amendments, addenda and errata. Where the term "Engineer" or "Commission" is referenced in the State Highway Specifications, it shall mean the VA Resident Engineer or VA Contracting Officer. C. Base aggregate levels will meet the following: 1. Provide aggregates consisting of crushed stone, gravel, sand, or other sound, durable mineral materials processed and blended, and naturally combined. 2. Sub base aggregate (where required) maximum size: 38mm(1-1/2"). 3. Base aggregate maximum size: a) Base course over 152mm(6") thick: 38mm(1-1/2"); b) Other base courses: 19mm(3/4"). c) Asphaltic base course: Maximum particle size not to exceed 25.4mm(1"). d) Where conflicts arise between this specification and the requirements in the latest version of the State Highway Specifications, the State Specifications shall control. e) Aggregates for asphaltic concrete paving: Provide a mixture of sand, mineral aggregate, and liquid asphalt mixed in such proportions that the percentage by weight will be within: i. Sieve Sizes ii. Percentage Passing iii. 19mm(3/4") iv. 100 v. 9.5mm(3/8") vi. 67 to 85 vii. 6.4mm(1/4") viii. 50 to 65 ix. 2.4mm(No.8 mesh) x. 37 to 50 xi. 600µm(No. 30 mesh) xii. 15 to 25 xiii. 75µm(No. 200 mesh) xiv. 3 to 8 plus 50/60 penetration liquid asphalt at 5 percent to 6-1/2 percent of the combined dry aggregates. D. Asphalt levels will meet the following: 1. Comply with provisions of Asphalt Institute Specification SS2: 2. Asphalt cement: Penetration grade 50/60 3. Prime coat: Cut-back type, grade MC-250 a) Tack coat: Uniformly emulsified, grade SS b) Provide a sealer consisting of suitable fibrated chemical type asphalt base binders and fillers having a container consistency suitable for troweling after thorough stirring, and containing no clay or other deleterious substance. c) Where conflicts arise between this specification and the requirements in the latest version of the State Highway Specifications, the State Specifications shall control. E. Installation of materials will comply with TIL Master Specification Section 32-12-16 Asphalt Paving. Requirements of Tree Removal: A. Contractor will provide all equipment, labor and material to remove eight trees, including stumps. All parts of trees will be removed from the construction site by the contractor, including the root systems. The contractor will seek explicit identification of trees to be removed from the facility RE/COR prior to tree removal. One of the trees has a concrete core. B. The ground where the root systems are removed will be filled with "CLEAN" dirt or fill and compacted to ensure that there is no undue setting of the landscaping and that there are no noticeable depressions. C. The Contractor shall preserve and protect all structures, equipment, and vegetation (such as trees, shrubs, and grass) on or adjacent to the work site, which is not to be removed and which does not unreasonably interfere with the work required under this contract. The Contractor shall only remove trees when specifically authorized to do so, and shall avoid damaging vegetation that will remain in place. If any limbs or branches of trees are broken during contract performance, or by the careless operation of equipment, or by workmen, the Contractor shall trim those limbs or branches with a clean cut and paint the cut with a tree pruning compound as directed by the Contracting Officer. D. The Contractor shall protect from damage all existing improvements and utilities at or near the work site and on adjacent property of a third party, the locations of which are made known to or should be known by the Contractor. The Contractor shall repair any damage to those facilities, including those that are the property of a third party, resulting from failure to comply with the requirements of this contract or failure to exercise reasonable care in performing the work. If the Contractor fails or refuses to repair the damage promptly, the Contracting Officer may have the necessary work performed and charge the cost to the Contractor. (FAR 52.236 9) E. Contractor will perform tree removal in such manner as to eliminate hazards to persons and property; to minimize interference with use of adjacent areas, utilities and structures or interruption of use of such utilities; and to provide free passage to and from such adjacent areas of structures. F. Provide safeguards, including warning signs, barricades, temporary fences, warning lights, and other similar items that are required for protection of all personnel during tree removal operations. Qualifications of Contractors: A. Contractors are required to conduct a pre - bid site visit with the contracting officer, or representative to ensure scope and complexity of project is fully understood. B. All employees of general contractor or subcontractors shall have the 10-hour or 30-hour OSHA Construction Safety course and other relevant competency training, as determined by RE/COR acting as the Construction Safety Officer with input from the facility Construction Safety Committee. C. Training certifications shall be submitted to the VA Contracting Officer prior to work. If no training certifications are available, the contractor' Employer shall certify that he/she has met this requirement in writing, and submit it to the VA Contracting Officer prior to work. D. Contractors shall be equipped with all necessary tools, equipment, and Personal Protective Equipment (PPE) to perform the work safely, effectively, and timely E. Contractors shall have ready access to the latest versions of the following references: 1. American Association of State Highway and Transportation Officials (AASHTO): a) M031MM031-07-UL Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement (ASTM A615/A615M-09) b) M055MM055-09-UL Steel Welded Wire Reinforcement, Plain, for Concrete (ASTM A185) c) M147-65-UL Materials for Aggregate and Soil Aggregate Sub base, Base and Surface Courses (R 2004) d) M148-05-UL Liquid Membrane Forming Compounds for Curing Concrete (ASTM C309) e) M171-05-UL Sheet Materials for Curing Concrete (ASTM C171) f) M182-05-UL Burlap Cloth Made from Jute or Kenaf and Cotton Mats g) M213-01-UL Preformed Expansion Joint Fillers for Concrete Paving and Structural Construction (Non extruding and Resilient Bituminous Type) (ASTM D1751) h) M233-86-UL Boiled Linseed Oil Mixer for Treatment of Portland Cement Concrete i) T099-09-UL Moisture-Density Relations of Soils Using a 2.5 kg. (5.5 lb) Rammer and a 305 mm (12 in.) Drop j) T180-09-UL Moisture-Density Relations of Soils Using a 4.54 kg (10 lb.) Rammer and a 457 mm (18 in.) Drop 2. American Society for Testing and Materials (ASTM): a) C94/C94M-09 Ready Mixed Concrete b) C143/C143M-09 Slump of Hydraulic Cement Concrete c) A121-07 Metallic Coated Carbon Steel Barbed Wire d) A392-07 Zinc-Coated Steel Chain-Link Fence Fabric e) A817-07 Metal-Coated Steel Wire for Chain-Link Fence Fabric and Marcelled Tension Wire f) C94/C94M-07 Ready Mixed Concrete g) F567-07 Installation of Chain-Link Fence h) F626-(R2003) Fence Fittings i) F900-05 Industrial and Commercial Swing Gates j) F1043-06 Strength and Protective Coatings on Metal Industrial Chain-Link Fence Framework k) F1083-08 Pipe, Steel, Hot-Dipped Zinc-Coated (Galvanized) Welded, for Fence Structures. l) B1-07 Standard Specification for Hard-Drawn Copper Wire m) B3-07 Standard Specification for Soft or Annealed Copper Wire n) B8-11 Standard Specification for Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft o) C. Institute of Electrical and Electronics Engineers, Inc. (IEEE): p) 81-83 IEEE Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System Part 1: Normal Measurements 3. Federal Specifications (Fed. Spec.): 1) FF P 110J Padlock, Changeable Combination 4. National Fire Protection Association (NFPA): 1) 70-11 National Electrical Code (NEC) 2) 70E-12 National Electrical Safety Code 3) 99-12 Health Care Facilities 5. Underwriters Laboratories, Inc. (UL): 1) 44-10 Thermoset Insulated Wires and Cables 2) 83-08 Thermoplastic Insulated Wires and Cables 3) 467-07 Grounding and Bonding Equipment 6. VHA TIL Master Specification 32-31-13 7. VHA TIL Master Specification 26-05-26 8. 29 CFR 1910.266, Logging operations. 9. 29 CFR Part 1910 Subpart H. 10. 29 CFR Part 1910 Subpart I. 11. 29 CFR Part 1910 Subpart L. 12. 29 CFR Part 1910, Subpart N. 13. 29 CFR Part 1910, Subpart O. 14. 29 CFR Part 1910, Subpart P. 15. 29 CFR Part 1910, Subpart S. 16. 29 CFR 1910.269, Electric power generation, transmission, and distribution. 17. 29 CFR 1910.333, Selection and use of work practices. 18. 29 CFR 1910.151, Medical services and first aid. 19. 29 CFR 1910.106, Flammable and combustible liquids. 20. 29 CFR 1910.95, Occupational Noise Exposure. 21. Section 5(a) (1) of the OSH Act. F. OSHA Instruction 02-01-019 (CPL 2-1.19), Logging Operations, Inspection Procedures and Interpretive Guidance, March 17, 1995.