TECHNICAL SPECIFICATIONS

Transcription

1 TECHNICAL SPECIFICATIONS RUNWAY 1-19 RUNWAY SAFETY AREA (RSA) IMPROVEMENTS Construction Services At Farmingdale, New York Prepared by: URS Corporation NY An AECOM Company One Penn Plaza, Suite 600 New York, New York April 15, 2016

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3 ITEM X-5 MOBILIZATION/DEMOBILIZATION & CONSTRUCTION LAYOUT SURVEYING DESCRIPTION This item shall consist of the performance of construction preparatory operations, including the movement of personnel, equipment and materials to and from the project site; furnishing and maintaining security at all access points; employee background checks and security badges; vehicle inspections and registration, construction layout surveying, payment of performance bond, payment bond, guaranty bond, and other insurance premiums; equipment rented; general requirements of the Contract not otherwise included in pay items; and for the establishment and subsequent removal of the Resident Engineer's and Contractor's offices and other facilities necessary to begin and sustain work on a substantial phase of the Contract. At the completion of work all areas disturbed by the Contractor's operations shall be left free of debris. All improved surfaces shall remain after completion of the project. The Contractor shall submit a detailed Project Schedule to the Resident Engineer within ten (10) calendar days of the date of Notice to Proceed specifying all work items and their estimated duration. During the same period, the Contractor shall furnish a breakdown of all individual lump sum bid items showing the amount included therein for each category of work in order to provide a basis for valuation of the components and in determining progress payments. The Contractor shall pay all telephone, heating, and electric bills. An area for the Contractor s Staging Area has been provided and is shown on the Plans. Field Offices shall be located within the Staging Area, or as directed by the Resident Engineer. All work associated with setting up the Staging Area shall be considered incidental to Mobilization/Demobilization. X-5-1 MATERIALS ENGINEER'S OFFICE. The Resident Engineer's office shall consist of a trailer, entirely enclosed, waterproofed, with an entrance and satisfactory door lock. The trailer shall contain at least one table (36"x 48"x 48" high), one desk, one closet, and one file cabinet, each with a lock to secure equipment and project files. Two keys for each lock shall be provided to the Resident Engineer. The trailer shall be fully equipped with one telephone, one facsimile machine, and one computer (Desktop/monitor with at least an Intel Core i5 processor and 8GB of memory, equipped with Miscrosoft Word, Microsoft Excel, and internet access capabilities). The telephone and facsimile machine shall have separate phone numbers for each. The computer shall have its own telephone line for dial up access to the Internet. Satisfactory heating and cooling shall be supplied. This housing shall be for the exclusive use of the Resident Engineer or Inspectors for reviewing construction documents, making reports, and storing necessary equipment and supplies. Sanitary Mobilization/Demobilization & Construction Layout Surveying

4 facilities shall also be furnished by the Contractor. The Contractor shall maintain the office in acceptable condition, including janitorial service, throughout the period of the Contract and remove the office when no longer needed. All areas disturbed by the installation or construction of the Engineer's office, Contractor's office, stockpiles, vehicle parking areas, and incidentals shall be restored to their pre-construction conditions and grades at the completion of the project. CONSTRUCTION METHODS CONSTRUCTION LAYOUT SURVEYING. The Contractor will be required to provide the field forces which are needed to establish pavement line and grade, and other horizontal or vertical control, including supplemental benchmarks, necessary to secure a correct layout of the work. Stakes (or marks) for the line and grade of the pavement shall be set at sufficient intervals to assure conformance to plan line and grade. The Contractor shall be responsible for having the finished work conform to the lines, grades, elevations, and dimensions called for in the plans and specifications. The Contractor shall use qualified personnel and suitable equipment for the layout of work required and shall provide that it be done under the supervision of a Registered Surveyor or a Registered Engineer (on site). It shall be the Contractor's responsibility to verify any survey information appearing in the plans which he may use to layout the work. Prior to commencing any excavation or grading, the Contractor shall satisfy himself as to the accuracy of all survey data as indicated by the Plans and Specifications and/or as provided by the Resident Engineer. Should the Contractor discover any inaccuracies, errors, or omissions in the survey data, he shall immediately notify the Resident Engineer, in writing, in order that proper adjustments can be anticipated and ordered. Contractor shall also notify the Resident Engineer, in writing, that he acknowledges that all existing survey data is accurate and acceptable. In any case, commencement by the Contractor of any excavation or grading shall be held as an acceptance of the survey data by him after which time the Contractor has no claim against the Resident Engineer or the Authority resulting from alleged errors, omissions, or inaccuracies of the said survey data. METHOD OF MEASUREMENT METHOD OF MEASUREMENT. Payment for Mobilization/Demobilization and Construction Layout Surveying will be made on a lump sum basis wherein no measurement will be made. BASIS OF PAYMENT BASIS OF PAYMENT. This item will be paid for at the Contract lump sum price for Mobilization/Demobilization and Construction Layout Surveying, which price shall be full X-5-2 Mobilization/Demobilization & Construction Layout Surveying

5 compensation for performing the work specified and the furnishing of all materials, labor, tools, equipment and incidentals necessary to mobilize and subsequently demobilize the construction preparatory operations. Payment for this item will be made in installments. The first payment of 50 percent of the lump sum price will be included in the first progress estimate following partial mobilization including the placement or erection of the Contractor's staging area and Engineer's office and the initiation of construction work. The remaining 50 percent of the lump sum price will be included as installments in subsequent progress estimates. Each such installment will be determined based on the ratio of the total work completed to date to the total contract amount. The lump sum price for Mobilization/Demobilization and Construction Layout Surveying shall not exceed five (5) percent of the total Contract bid amount for base bid less the bid price for Mobilization/Demobilization and Construction Layout Surveying. No payment in excess of 5 percent of the total contract bid amount for base bid less the bid price for Mobilization/Demobilization and Construction Layout Surveying will be made for this item. No additional payment will be made for demobilization and remobilization due to weather related shutdowns or suspensions of the work, for movement of the equipment between construction phases, or for other mobilization activities. Payment will be made under: Item X Item X Mobilization/Demobilization per lump sum Construction Layout Surveying per lump sum END OF ITEM X-5 X-5-3 Mobilization/Demobilization & Construction Layout Surveying

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7 ITEM X-6 TEMPORARY CONSTRUCTION ITEMS DESCRIPTION This item shall consist of furnishing all labor, materials and equipment for temporary construction items necessary for the safe and proper execution of work on this project. The Contractor will be expected to supply, utilize, and remove the items listed below and other items as required in the Construction and Phasing Notes contained in the plans and specifications. Temporary construction items to be provided include but are not limited to: construction barricades, closed runway markers, construction and maintenance of temporary haul roads, maintenance of traffic, portable floodlighting, radios, steel plates for temporary covering of excavations, and labor and equipment as needed to keep all operational airfield areas continuously free of debris. MATERIALS CONSTRUCTION BARRICADES. Construction barricades shall be provided as indicated on the Plans. The Contractor shall be responsible for maintaining the barricades (paint and lights) in good condition PORTABLE FLOODLIGHTING. Portable floodlighting shall be provided, as required, for construction during periods of limited visibility (i.e., nighttime construction). The Contractor shall provide sufficient units so that all work areas are illuminated to a level of 5 horizontal footcandles. The lighting levels shall be calculated and measured in accordance with the current standards of the Illumination Engineering Society. The Contractor shall provide place and operate sufficient portable floodlighting for each work area HAUL ROADS. Contractor haul routes have been designated on the Plans. Contractor shall supply all materials for temporary access roads, such as crushed aggregate for surfacing and drainage pipe, and shall obtain approval by the Resident Engineer prior to use. The Contractor shall maintain all access/haul roads in good condition at all times. The Contractor shall make repairs as directed by the Resident Engineer. All public roadways must be kept clean and free of debris at all times CONSTRUCTION PROTECTION. Protection of existing pavement using steel plates shall be provided as necessary. Protection of adequate size and thickness shall be furnished as necessary to cover temporary excavations, unfinished structures, or surfaces requiring protection for safety purposes. Plates shall be securely fastened down and shall be adequate to safely support any anticipated loadings to be imposed MAINTENANCE OF TRAFFIC. Maintenance of traffic shall include providing and installing New York State Department of Transportation (NYSDOT) approved signage as shown on the drawings or as directed by the Resident Engineer, and all incidentals necessary to maintain them. X-6-1 Temporary Construction Items

8 6-2.6 CLOSED RUNWAY MARKINGS. Portable lighted runway closure markers shall be provided by the Airport and installed by the Contractor as required during scheduled Runway closures. The Contractor shall be responsible for maintaining the X s and return to the Airport in good operating condition RADIOS. The Contractor shall furnish four (4) Nextel Radios/Phone for use by the Resident Engineer and the Authority s Representative throughout the length of the Contract. The Project Superintendent and all other project personnel including gate guards and flagmen shall also have the proper equipment. The Contractor shall provide and maintain radios to receive direction from the FAA Air Traffic Control Tower (ATCT) on a frequency of MHZ. Radio contact with the ATCT is required at all times while the Contractor has personnel and equipment on the project site, and while they are in the AOA. Sufficient radios shall be on site and operating so that instructions and communications may be dispatched to all crews and/or equipment working in an active AOA within one minute after receipt from the ATCT. Contractor shall not make contact with FAA ATCT, except in emergencies. The Resident Engineer or Authority will make necessary communication with the tower TEMPORARY PAVEMENT MARKING AND REMOVAL. Temporary Pavement Markings shall include all layout, application and removal, labor, equipment and tools, and materials required to install the markings as designated in the Plans or as directed by the Resident Engineer. Paint shall be a latex product approved by the Resident Engineer. The Contractor to adhere to the Construction Methods section of Item P-620 when installing temporary markings. Marking removal shall be conducted as directed by the Resident Engineer but shall not be damaging to the pavement. CONSTRUCTION METHODS CONSTRUCTION BARRICADES. Construction barricades shall be placed as indicated on the Phasing Plan and/or as directed by the Resident Engineer. Barricades will typically be placed perpendicular to the runway or taxiway centerline. Barricades shall remain in place from the beginning of construction until removal as authorized by the Resident Engineer. All flashing lights shall be inspected daily by the Contractor and remain in operation at all times for the duration of the construction work. Construction barricades shall become airport property at the end of the project and shall be relocated to a site as directed by the Resident Engineer HAUL ROADS. Haul roads shall be maintained to allow for unimpeded access to the work site. The locations of the Contractor's haul roads are indicated on the Plans. Haul roads shall be restored to their original pre-construction condition after construction is completed, unless otherwise noted on the Plans. X-6-2 Temporary Construction Items

9 6-3.3 FLAGPERSONS. Flagpersons shall be provided, as necessary, to control the Contractor s traffic during the prosecution of work. All Contractor vehicles or equipment that are required to cross active pavement or safety areas shall do so under the direct control of a competent flagperson at each such crossing. Flagperson shall be in contact with designated Airport personnel who is in direct radio contact with ATCT personnel. Flagpersons shall have received training from airport authority personnel before being assigned duties. All aircraft traffic shall have priority over the Contractor s traffic GATE SECURITY. The Contractor must use gate guards. Contractor security personnel shall be assigned to existing airport security gate(s) during periods when the gate(s) will be used for construction traffic. METHOD OF MEASUREMENT No direct measurement will be made for this item as payment will be made on a lump sum basis. BASIS OF PAYMENT Payment will be made at the lump sum bid price for "Temporary Construction Items." This payment shall be full compensation for furnishing all materials and labor for placing, moving, and removing construction barricades, constructing, maintaining and removing temporary haul roads, maintenance of traffic, providing flagpersons, gate guards, radios, providing runway closure markers, and furnishing portable floodlighting, steel plates for temporary covering of excavation, dust control and for any other labor, materials, equipment, tools and incidentals necessary for temporary items required for construction of this project. Payment for this item will be made in installments. The first payment of 50 percent of the lump sum price will be included in the first progress estimate following the initiation of construction work. The remaining 50 percent of the lump sum price will be included as installments in subsequent progress estimates. Each such installment will be determined based on the ratio of the total work completed to date to the total contract amount. Upon submittal of the first pay estimates, the Contractor shall provide with his estimate a complete breakdown of items and associated costs included in his Temporary Construction Items. The lump sum price for Temporary Construction Items shall not exceed four (4) percent of the total Contract bid amount for base bid less the bid price for Mobilization/Demobilization and Construction Layout Surveying and Temporary Construction Items. No payment in excess of four (4) percent of the total construct bid amount for base bid less the bid price for Mobilization/Demobilization and Construction Layout Surveying and Temporary Construction Items will be made for this item. X-6-3 Temporary Construction Items

10 Payment will be made under: URS CORPORATION - NY Item X Temporary Construction Items per lump sum END OF ITEM X-6 X-6-4 Temporary Construction Items

11 ITEM X-7 ALLOWANCES PART 1 - GENERAL 1.1 SUMMARY A. This Section includes administrative and procedural requirements governing the following: 1. Unit cost allowances. 1.2 SELECTION AND PURCHASE A. At the earliest practical date after award of the Contract, advise the Project Engineer of the date when final selection and purchase of each product or system described by an allowance must be completed to avoid delaying the Work. B. At the Project Engineer's request, obtain proposals for each allowance for use in making final selections. Include recommendations and work plans that are relevant to performing the Work. C. Purchase products and systems approved by the Project Engineer from the designated supplier. 1.3 SUBMITTALS A. Submit proposals for purchase of products or systems with work plans, if required, included in allowances, in the form specified for Change Orders. B. Submit invoices or delivery slips to show actual quantities of materials delivered to the site for use in fulfillment of each allowance. 1.4 UNUSED MATERIALS A. Return unused materials purchased under an allowance to manufacturer or supplier for credit to Owner, after installation has been completed and accepted. 1. If requested by the Project Engineer, prepare unused material for storage by Owner when it is not economically practical to return the material for credit. If directed by the Project Engineer, deliver unused material to Owner's storage space. Otherwise, disposal of unused material is Contractor's responsibility. PART 2 - PRODUCTS (Not Used) X-7-1 Allowances

12 PART 3 - EXECUTION URS CORPORATION - NY 3.1 EXAMINATION A. Examine products covered by an allowance promptly on delivery for damage or defects. Return damaged or defective products to manufacturer for replacement. 3.2 PREPARATION A. Coordinate materials and their installation for each allowance with related materials and installations to ensure that each allowance item is completely integrated and interfaced with related work. 3.3 SCHEDULE OF ALLOWANCES A. Include the sum of $200,000 as a lump sum allowance to provide materials, equipment and labor for use as directed by the engineer for site conditions not specifically covered otherwise by the contract documents. PART 4 MEASUREMENT 4.1 METHOD OF MEASUREMENT A No direct measurement shall be made on payment item X-7 as payment will be made on actual approved cost basis. PART 5 PAYMENT 5.1 BASIS OF PAYMENT A. Installed and accepted work will be paid for at the contract unit price bid for work bid under items or agreed upon in writing prior to start of the allowance work. The bid price or the agreed upon price shall be full compensation for mobilization and demobilization; temporary construction items; maintenance of traffic; supervision; for furnishing all materials and for all layout, erection, labor, equipment, tools, and incidentals necessary to complete the item in accordance with these specifications. B. Payment will be made under: Item X Allowance--per allowance END OF SECTION X-7 X-7-2 Allowances

13 ITEM X-85 SAWCUTTING DESCRIPTION This item shall consist of sawcutting existing bituminous and/or concrete pavements to provide a uniform joint alignment in sound material or to provide a sealant reservoir as shown on the plans or as directed by the Engineer. EQUIPMENT Saws shall be power-driven, self-propelled, wheel or track-mounted, and capable of cutting to the required depth in one pass. The use of a cutting wheel mounted on a roller, grader or similar equipment, or the use of pneumatically driven hand-held tools, will only be approved if the Contractor can demonstrate to the satisfaction of the Engineer that such equipment can consistently produce satisfactory results. Multi-bladed arbor saws shall be used to construct sealant reservoirs. CONSTRUCTION METHODS The Contractor shall establish the line to be cut using chalkline or similar means in accordance with the details shown on the plans or as directed by the Engineer. The finished cut shall be reasonably true to line, smooth, and vertical The existing paving material beyond the saw cut shall be removed as indicated on the plans or to the depth of the cut and disposed of off airport property All dust, chips, slurry or waste material shall be carefully picked-up and removed from the site in accordance with the General Safety Requirements of the contract and disposed of off airport property. METHOD OF MEASUREMENT Sawcutting will not be measured for payment. BASIS OF PAYMENT No separate payment will be made for Sawcutting. The price for sawcutting shall be incidental to the item of work requiring this activity and shall be full compensation for all materials, labor, equipment, loading, hauling, disposal, clean-up, and incidentals required to complete the work in accordance with these Specifications, the contract drawings, or as directed by the Engineer. END OF ITEM X-85 X-85-1 Sawcutting

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15 ITEM P-101 SURFACE PREPARATION DESCRIPTION This item shall consist of preparation of existing pavement surfaces for overlay, surface treatments, removal of existing pavement, and other miscellaneous items. The work shall be accomplished in accordance with these specifications and the applicable drawings. EQUIPMENT All equipment shall be specified here and in the following paragraphs or approved by the Engineer. The equipment shall not cause damage to the pavement to remain in place Removal of existing pavement. CONSTRUCTION a. Concrete pavement. The existing concrete pavement to be removed shall be freed from the pavement to remain by sawing through the complete depth of the slab one foot inside the perimeter of the final removal limits or outside the dowels, whichever is greater when the limits of removal are located on the joints. The pavement between the perimeter of the pavement removal and the saw cut shall be carefully broken up and removed using hand-held jackhammers, weighing 30 pounds or less, or other light-duty equipment which will not cause distress in the pavement which is to remain in place. The Contractor shall have the option of sawing through the dowels at the joint, removing the pavement and installing new dowels. Where the perimeter of the removal limits is not located on the joint and there are no dowels present, then the perimeter shall be saw cut the full depth of the pavement. The pavement inside the saw cut shall be removed by methods suitable to the Engineer which will not cause distress in the pavement which is to remain in place. If the material is to be wasted on the airport site, it shall be reduced to a maximum size designated by the Engineer. The Contractor s removal operation shall not cause damage to cables, utility ducts, pipelines, or drainage structures under the pavement. Concrete slabs that are damaged by under breaking shall be removed. Any damage shall be repaired at the Contractor s expense. b. Bituminous concrete pavement. Asphalt concrete pavement to be removed shall be cut to the full depth of the bituminous material around the perimeter of the area to be removed. The pavement shall be removed so the joint for each layer of pavement replacement is offset 1 foot from the joint in the preceding layer. This does not apply if the removed pavement is to be replaced with concrete or soil. If the material is to be wasted on the airport site, it shall be broken to a maximum size designated by the Engineer Preparation of joints and cracks. Remove all vegetation and debris from cracks to a minimum depth of 1 inch. If extensive vegetation exists treat the specific area with a concentrated solution of a water-based herbicide approved by the Engineer. Fill all cracks, ignoring hairline cracks (< 1/4 inch wide) with a crack sealant per ASTM D6690. Wider cracks (over 1-1/2 inch wide), along with soft or sunken spots, indicate that the pavement or the pavement base should be repaired or replaced as stated below. P Surface Preparation

16 Any excess joint or crack sealer on the surface of the pavement shall also be removed from the pavement surface Removal of paint and rubber. All painted pavement markings as required on the plans, or as directed by the Engineer shall be removed from the surface of the existing pavement. Painted surfaces included within the areas designated for pavement removal are not included in this item. Paint removal in areas designated for pavement removal will be considered incidental to pavement removal. Removal operation will be accomplished by waterblasting or other approved, non-destructive methods. The use of chemicals, milling, grinding, sandblasting and other destructive methods will not be permitted. The Contractor shall furnish all equipment, water trucks, and labor for delivery of water to the job site. The Contractor should assume that water required for paint removal will not be available on the airport property. The treatment of the surface shall not be damaging to the bituminous concrete or Portland cement concrete surfaces and joint sealants. If it is deemed by the Engineer that damage to the existing pavement is caused by an operational error, such as permitting pressure water to dwell in one location for an extensive time, the Contractor shall repair said damage without compensation. Paint removal shall be identified as the removal of at least 90 percent of the existing marking. The 90 percent removal level is defined such that there will not be any remaining surface of undisturbed paint or individual contiguous areas larger than one square inch where the surface of the pavement material is not clearly exposed. The method shall not materially damage the structural integrity of the pavement. Any damage caused by the Contractor s operations shall be corrected at the Contractor s expense and in a manor approved by the Engineer. The Contractor shall take precautions to protect the public from any damage due to his operations. Accumulation of sand, water, dust, or other residue resulting from the removal operation shall be removed as the work progresses Bituminous concrete pavement repair. The failed areas shall be removed as specified in paragraph b. All failed material including surface, base course, subbase course, and subgrade shall be removed. The base course and subbase shall be replaced if it has been infiltrated with clay, silt, or other material affecting the load-bearing capacity. Materials and methods of construction shall comply with the other applicable sections of this specification Bituminous pavement milling. Milling shall be performed with a power-operated milling machine or grinder, capable of producing a finished surface that provides a good bond to the new overlay. The milling machine or grinder shall operate without tearing or gouging the under laying surface. The milling machine or grinder shall be equipped with automatic grade and slope controls. All millings shall be removed and disposed off Airport property, unless otherwise specified. If the Contractor mills or grinds deeper or wider than the plans specify, the Contractor shall replace the material that was removed with new material at no additional cost to the Owner. a. Patching. The milling machine shall be capable of cutting a vertical edge without chipping or spalling the edges of the remaining pavement and it shall have a positive method of controlling the depth of cut. The Engineer shall layout the area to be milled with a straightedge in increments of 1 foot widths. The area to be milled shall cover only the failed area. Any excessive area that is milled because the Contractor doesn t have the appropriate milling machine, or areas that are damaged because of his negligence, shall not be included in the measurement for payment. b. Profiling, grade correction, or surface correction. The milling machine shall have a minimum width of 7 feet and it shall be equipped with electronic grade control devices that will cut the surface to P Surface Preparation

17 the grade and tolerances specified. The machine shall cut vertical edges. A positive method of dust control shall be provided. The machine shall have the ability to remove the millings or cuttings from the pavement and load them into a truck. c. Clean-up. The Contractor shall sweep the milled surface daily and immediately after the milling until all residual aggregate and fines are removed from the pavement surface. Prior to paving, the Contractor shall wet down the milled pavement and thoroughly sweep and/or blow the surface to remove any remaining aggregate or fines Maintenance. The Contractor shall perform all maintenance work necessary to keep the pavement in a satisfactory condition until the full section is complete and accepted by the Engineer. The surface shall be kept clean and free from foreign material. The pavement shall be properly drained at all times. If cleaning is necessary or if the pavement becomes disturbed, any work repairs necessary shall be performed at the Contractor s expense Preparation of Joints in Rigid Pavement Removal of Existing Joint Sealant. All existing joint sealants will be removed by plowing or use of hand tools. Any remaining sealant and or debris will be removed by use of wire brushes or other tools as necessary. Resaw joints removing no more than 1/16 inch from each joint face. Immediately after sawing, flush out joint with water and other tools as necessary to completely remove the slurry. Allow sufficient time to dry out joints prior to sealing Cleaning prior to sealing. Immediately before sealing, joints shall be cleaned by removing any remaining laitance and other foreign material. Clean joints by sandblasting, or other method approved by the Engineer, on each joint face with nozzle held at an angle and not more than three inches from face. Following sandblasting, clean joints with air free of oil and water. Joint surfaces will be surface-dry prior to installation of sealant Preparation of Cracks in Flexible Pavement Preparation of Crack. Widen crack with a router by removing a minimum of 1/16 inch from each side of crack. Immediately before sealing, joints will be blown out with a hot air lance combined with oil and water-free compressed air Removal of Existing Sealant. Existing sealants will be removed by routing. Following routing any remaining debris will be removed by use of a hot lance combined with oil and water-free compressed air. METHOD OF MEASUREMENT Pavement demolition. The unit of measurement for pavement removal shall be the number of square yards removed by the Contractor. Any pavement removed outside the limits of removal because the pavement was damaged by negligence on the part of the Contractor shall not be included in the measurement for payment Joint and crack repair. Joint and crack repair shall not be measured and shall be considered incidental to the pay item requiring it Pavement marking removal. The unit of measurement for paint and rubber removal shall be the square foot. P Surface Preparation

18 Pavement milling. The unit of measure for pavement milling shall be per the square yard. If the initial cut doesn t correct the condition and surface correction is required, the Contractor shall re-mill the area and will be paid only once for the total depth of milling. BASIS OF PAYMENT Payment. Payment shall be made at contract unit price for the unit of measurement as specified above. This price shall be full compensation for furnishing all materials and for all preparation, hauling, and placing of the material and for all labor, equipment, tools, and incidentals necessary to complete this item. Item P Item P Item P Pavement Demolition per square yard Pavement Milling, Variable Depth per square yard Pavement Marking Removal per square yard ASTM D6690 MATERIAL REQUIREMENTS Standard Specification For Joint And Crack Sealants, Hot Applied, For Concrete And Asphalt Pavements END OF ITEM P-101 P Surface Preparation

19 ITEM P-151 CLEARING AND GRUBBING DESCRIPTION This item shall consist of clearing or clearing and grubbing, including the disposal of materials, for all areas within the limits designated on the plans or as required by the Engineer. a. Clearing shall consist of the cutting and removal of all trees, stumps, brush, logs, hedges, the removal of fences and other loose or projecting material from the designated areas. The grubbing of stumps and roots will not be required. b. Clearing and grubbing shall consist of clearing the surface of the ground of the designated areas of all trees, stumps, down timber, logs, snags, brush, undergrowth, hedges, heavy growth of grass or weeds, fences, structures, debris, and rubbish of any nature, natural obstructions or such material which in the opinion of the Engineer is unsuitable for the foundation of strips, pavements, or other required structures, including the grubbing of stumps, roots, matted roots, foundations, and the disposal from the project of all spoil materials resulting from clearing and grubbing. CONSTRUCTION METHODS General. The areas denoted on the plans to be cleared or cleared and grubbed shall be staked on the ground by the Engineer. The clearing and grubbing shall be done at a satisfactory distance in advance of the grading operations. All spoil materials removed by clearing or by clearing and grubbing shall be disposed of outside the Airport s limits at the Contractor s responsibility, except when otherwise directed by the Engineer. As far as practicable, waste concrete and masonry shall be placed on slopes of embankments or channels. When embankments are constructed of such material, this material shall be placed in accordance with requirements for formation of embankments. Any broken concrete or masonry that cannot be used in construction and all other materials not considered suitable for use elsewhere, shall be disposed of by the Contractor. In no case shall any discarded materials be left in windrows or piles adjacent to or within the airport limits. The manner and location of disposal of materials shall be subject to the approval of the Engineer and shall not create an unsightly or objectionable view. When the Contractor is required to locate a disposal area outside the airport property limits, the Contractor shall obtain and file with the Engineer permission in writing from the property owner for the use of private property for this purpose. Blasting shall not be allowed. The removal of existing structure and utilities required to permit orderly progress of work shall be accomplished by local agencies, unless otherwise shown on the plans. Whenever a telephone or telegraph pole, pipeline, conduit, sewer, roadway, or other utility is encountered and must be removed or relocated, the Contractor shall advise the Engineer who will notify the proper local authority or owner to secure prompt action Clearing. The Contractor shall clear the staked or indicated area of all objectionable materials. Trees unavoidably falling outside the specified clearing limits must be cut up, removed, and disposed of in a satisfactory manner. To minimize damage to trees that are to be left standing, trees shall be felled toward the center of the area being cleared. The Contractor shall preserve and protect from injury all trees P Clearing and Grubbing

20 not to be removed. The trees, stumps, and brush shall be cut flush with the original ground surface. The grubbing of stumps and roots will not be required. Fences shall be removed and disposed of as directed by the Engineer. Fence wire shall be neatly rolled and the wire and posts stored on the airport if they are to be used again, or stored at a location designated by the Engineer if the fence is to remain the property of a local owner or authority Clearing and grubbing. In areas designated to be cleared and grubbed, all stumps, roots, buried logs, brush, grass, and other unsatisfactory materials shall be removed, except where embankments exceeding 3-1/2 feet in depth will be constructed outside of paved areas. For embankments constructed outside of paved areas, all unsatisfactory materials shall be removed, but sound trees, stumps, and brush can be cut off flush with the original ground and allowed to remain. Tap roots and other projections over 1-1/2 inches in diameter shall be grubbed out to a depth of at least 18 inches below the finished subgrade or slope elevation. Any buildings and miscellaneous structures that are shown on the plans to be removed shall be demolished or removed, and all materials shall be disposed of by removal from the site. The cost of removal is incidental to this item. The remaining or existing foundations, wells, cesspools, and like structures shall be destroyed by breaking down the materials of which the foundations, wells, cesspools, etc., are built to a depth at least 2 feet below the existing surrounding ground. Any broken concrete, blocks, or other objectionable material that cannot be used in backfill shall be removed and disposed of at the Contractor s expense. The holes or openings shall be backfilled with acceptable material and properly compacted. All holes under embankment areas remaining after the grubbing operation shall have the sides of the holes flattened to facilitate filling with acceptable material and compacting as required in Item P-152. The same procedure shall be applied to all holes remaining after grubbing in areas where the depth of holes exceeds the depth of the proposed excavation. METHOD OF MEASUREMENT The quantities of clearing and grubbing as shown by the limits on the plans or as ordered by the Engineer shall be the number of acres or fractions thereof, of land specifically cleared or cleared and grubbed. BASIS OF PAYMENT Payment shall be made at the contract unit price per acre for clearing and grubbing. This price shall be full compensation for furnishing all materials and for all labor, equipment, tools, and incidentals necessary to complete the item. Payment will be made under: Item P Clearing and grubbing - per acre END OF ITEM P-151 P Clearing and Grubbing

21 ITEM P-152 EXCAVATION, SUBGRADE, AND EMBANKMENT DESCRIPTION This item covers excavation, disposal, placement, and compaction of all materials within the limits of the work required to construct safety areas, runways, taxiways, aprons, and intermediate areas as well as other areas for drainage, building construction, parking, or other purposes in accordance with these specifications and in conformity to the dimensions and typical sections shown on the plans Classification. All material excavated shall be classified as defined below: a. Unclassified excavation. Unclassified excavation shall consist of the excavation and disposal of all material, regardless of its nature which is not otherwise classified and paid for under one of the following items. All unclassified excavation material shall be disposed off airport property, which is incidental to this pay item. b. Borrow excavation. Borrow excavation shall consist of approved material required for the construction of embankments or for other portions of the work in excess of the quantity of usable material available from required excavations. Borrow material shall be obtained from areas outside the airport boundaries. c. Undercut Excavation. Undercut Excavation shall consist of approved undercutting of the subgrade and the backfill to replace material susceptible to frost heaving or differential frost action and to remedy unstable soil conditions. d. Unsuitable Excavation. Any material containing vegetable or organic matter, such as muck, peat, organic silt, or sod shall be considered unsuitable for use in embankment construction. Material, suitable for topsoil may be used on the embankment slope when approved by the Engineer. CONSTRUCTION METHODS General. Before beginning excavation, grading, and embankment operations in any area, the area shall be completely cleared and grubbed in accordance with Item P-151. The suitability of material to be placed in embankments shall be subject to approval by the Engineer. All unsuitable material shall be disposed of in waste areas shown on the plans. All waste areas shall be graded to allow positive drainage of the area and of adjacent areas. The surface elevation of waste areas shall not extend above the surface elevation of adjacent usable areas of the airport, unless specified on the plans or approved by the Engineer. When the Contractor s excavating operations encounter artifacts of historical or archaeological significance, the operations shall be temporarily discontinued. At the direction of the Engineer, the Contractor shall excavate the site in such a manner as to preserve the artifacts encountered and allow for their removal. Such excavation will be paid for as extra work. Those areas outside of the limits of the pavement areas where the top layer of soil material has become compacted by hauling or other Contractor activities shall be scarified and disked to a depth of 4 inches, to loosen and pulverize the soil. If it is necessary to interrupt existing surface drainage, sewers or under-drainage, conduits, utilities, or similar underground structures, the Contractor shall be responsible for and shall take all necessary P Excavation, Subgrade, and Embankment

22 precautions to preserve them or provide temporary services. When such facilities are encountered, the Contractor shall notify the Engineer, who shall arrange for their removal if necessary. The Contractor, at his or her expense, shall satisfactorily repair or pay the cost of all damage to such facilities or structures that may result from any of the Contractor s operations during the period of the contract Excavation. No excavation shall be started until the work has been staked out by the Contractor and the Engineer has obtained from the Contractor, the survey notes of the elevations and measurements of the ground surface. All areas to be excavated shall be stripped of vegetation and topsoil. Topsoil shall be stockpiled for future use in areas designated on the plans or by the Engineer. All suitable excavated material shall be used in the formation of embankment, subgrade, or other purposes shown on the plans. All unsuitable material shall be disposed of as directed by the Engineer. When the volume of the excavation exceeds that required to construct the embankments to the grades indicated, the excess shall be used to grade the areas of ultimate development or disposed as directed by the Engineer. When the volume of excavation is not sufficient for constructing the embankments to the grades indicated, the deficiency shall be obtained from borrow areas. The grade shall be maintained so that the surface is well drained at all times. When necessary, temporary drains and drainage ditches shall be installed to intercept or divert surface water that may affect the work. a. Selective grading. When selective grading is indicated on the plans, the more suitable material designated by the Engineer shall be used in constructing the embankment or in capping the pavement subgrade. If, at the time of excavation, it is not possible to place this material in its final location, it shall be stockpiled in approved areas. b. Undercutting. Rock, shale, hardpan, loose rock, boulders, or other material unsatisfactory for safety areas, subgrades, roads, shoulders, or any areas intended for turf shall be excavated to a minimum depth of 12 inches below the subgrade or to the depth specified by the Engineer. Muck, peat, matted roots, or other yielding material, unsatisfactory for subgrade foundation, shall be removed to the depth specified. Unsuitable materials shall be disposed off the airport. The cost is incidental to this item. This excavated material shall be paid for at the contract unit price per cubic yard for Undercut Excavation. The excavated area shall be backfilled with suitable material obtained from the grading operations or borrow areas and compacted to specified densities. The necessary backfill will constitute a part of the embankment. Where rock cuts are made, backfill with select material. Any pockets created in the rock surface shall be drained in accordance with the details shown on the plans. c. Overbreak. Overbreak, including slides, is that portion of any material displaced or loosened beyond the finished work as planned or authorized by the Engineer. All overbreak shall be graded or removed by the Contractor and disposed of as directed by the Engineer. The Engineer shall determine if the displacement of such material was unavoidable and his or her decision shall be final. Payment will not be made for the removal and disposal of overbreak that the Engineer determines as avoidable. Unavoidable overbreak will be classified as Unclassified Excavation. d. Removal of utilities. The removal of existing structures and utilities required to permit the orderly progress of work will be accomplished by someone other than the Contractor; for example, the utility unless otherwise shown on the plans. All existing foundations shall be excavated at least 2 feet below the top of subgrade or as indicated on the plans, and the material disposed of as directed by the Engineer. All foundations thus excavated shall be backfilled with suitable material and compacted as specified. e. Compaction requirements. The subgrade under areas to be paved shall be compacted to the depths and densities noted in the tables that follow as determined by ASTM D1557. The material to be compacted shall be within ±2% of optimum moisture content before being rolled to obtain the prescribed P Excavation, Subgrade, and Embankment

23 compaction (except for expansive soils). Non-cohesive soils, for the purposes of determining compaction control, are those with a plasticity index of less than 3. Non-Cohesive Soils: Compaction 100% 95% 90% 85% Depth below finished subgrade, Inch Cohesive Soils: Compaction 95% 90% 85% 80% Depth below finished subgrade, Inch The in-place field density shall be determined in accordance with ASTM D6938 using Procedure A, the direct transmission method, and ASTM D6938 shall be used to determine the moisture content of the material. The machine shall be calibrated in accordance with ASTM D6938. Stones or rock fragments larger than 4 inches in their greatest dimension will not be permitted in the top 6 inches of the subgrade. The finished grading operations, conforming to the typical cross-section, shall be completed and maintained at least 1,000 feet ahead of the paving operations or as directed by the Engineer. All loose or protruding rocks on the back slopes of cuts shall be pried loose or otherwise removed to the slope finished grade line. All cut-and-fill slopes shall be uniformly dressed to the slope, cross-section, and alignment shown on the plans or as directed by the Engineer. Blasting shall not be allowed. f. Proof rolling. After compaction is completed, the subgrade area shall be proof rolled with heavy pneumatic-tired roller having four or more tires abreast, each tire loaded to a minimum of 30,000 pounds and inflated to a minimum of 125 psi in the presence of the Engineer. Apply a minimum of 1 coverage, or as specified by the Engineer, to all paved areas. A coverage is defined as the application of one tire print over the designated area. Soft areas of subgrade that deflect more than 1 inch or show permanent deformation greater than 1 inch shall be removed and replaced with suitable material or reworked to conform to the moisture content and compaction requirements in accordance with these specifications Borrow excavation. The Contractor shall obtain borrow material from an offsite location outside the boundaries of the airport property. The Contractor shall notify the Engineer, at least 15 days prior to beginning the excavation, so necessary measurements and tests can be made. The Contractor shall submit the name and address of the supplier; approximate amount of material to be imported; location from which the material was excavated or recovered; the gradation and plastic index of the material and a written certification from the material supplier that the borrow material(s) are free of hazardous materials and or substances as defined by local, state and federal environmental regulations. When written certification is not available from the material supplier that states that the material is free of hazardous materials and/or substances, the Contractor shall arrange, at the Contractor s expense, for the materials to be tested in accordance with the latest edition of EPA SW846 "Test Methods for Evaluating Solid P Excavation, Subgrade, and Embankment

24 Waste". Material testing shall include, but not be limited to EPA test methods 8015 petroleum hydrocarbons, 8260 (VOCs), 8270 (SVOCs), 8081/8082(pesticides/PCBs), 8310 (PAHs), and 6010/7000 series (priority pollutant metals). All sample collections and analysis shall be performed by a state certified laboratory. The Contractor shall submit the material supplier(s) certifications and/or the certified laboratory results in the Quality Control Report for approval prior to bringing material onto the job site All unsuitable material shall be disposed of by the Contractor. Borrow pits shall be excavated to regular lines to permit accurate measurements, and they shall be drained and left in a neat, presentable condition with all slopes dressed uniformly Preparation of embankment area. Where an embankment is to be constructed to a height of 4 feet or less, all sod and vegetative matter shall be removed from the surface upon which the embankment is to be placed. The cleared surface shall be broken up by plowing or scarifying to a minimum depth of 6 inches and shall then be compacted as indicated in paragraph When the height of fill is greater than 4 feet, sod not required to be removed shall be thoroughly disked and recompacted to the density of the surrounding ground before construction of embankment. Sloped surfaces steeper than one (1) vertical to four (4) horizontal shall be plowed, stepped, benched, or broken up so that the fill material will bond with the existing material. When the subgrade is part fill and part excavation or natural ground, the excavated or natural ground portion shall be scarified to a depth of 12 inches and compacted as specified for the adjacent fill. No direct payment shall be made for the work performed under this section. The necessary clearing and grubbing and the quantity of excavation removed will be paid for under the respective items of work Formation of embankments. Embankments shall be formed in successive horizontal layers of not more than 8 inches in loose depth for the full width of the cross-section, unless otherwise approved by the Engineer. The layers shall be placed, to produce a soil structure as shown on the typical cross-section or as directed by the Engineer. Materials such as brush, hedge, roots, stumps, grass and other organic matter, shall not be incorporated or buried in the embankment. Earthwork operations shall be suspended at any time when satisfactory results cannot be obtained because of rain, freezing, or other unsatisfactory weather conditions in the field. Frozen material shall not be placed in the embankment nor shall embankment be placed upon frozen material. Material shall not be placed on surfaces that are muddy, frozen, or contain frost. The Contractor shall drag, blade, or slope the embankment to provide surface drainage at all times. The material in each layer shall be within ±2% of optimum moisture content before rolling to obtain the prescribed compaction. To achieve a uniform moisture content throughout the layer, the material shall be moistened or aerated as necessary. Samples of all embankment materials for testing, both before and after placement and compaction, will be taken for each 1,000 cubic yards or 1 day s production. Based on these tests, the Contractor shall make the necessary corrections and adjustments in methods, materials or moisture content to achieve the specified embankment density. Rolling operations shall be continued until the embankment is compacted to not less than 95% of maximum density for noncohesive soils, and 90% of maximum density for cohesive soils as determined by ASTM Under all areas to be paved, the embankments shall be compacted to the specified depths and densities listed under Section 2.2e as determined by ASTM On all areas outside of the pavement areas, no compaction will be required on the top 4 inches. P Excavation, Subgrade, and Embankment