J.2 Statement of Work (54 Pages).pdf

FORT VALLEY UTILITY REPAIRS 01110 - 1

SUMMARY OF WORK

SECTION 01110

SUMMARY OF WORK

PART 1 - GENERAL

1.1 SUMMARY

A. Work for this project consists of but is not necessarily limited to, the following major items of work as shown on the plans and as specified. The following descriptions are provided as an outline of major work items and shall not be construed as an inclusive or complete listing of all items of Work under this Contract:

1. Replacement of the water distribution system serving the Fort Valley

Experimental Forest Headquarters site. The project includes new water mains, and all associated valves, fittings, and yard hydrants.

2. Replacement of the Natural Gas distribution system serving the Fort Valley Experimental Forest Headquarters site. The project includes new gas main, and all associated valves, fittings, regulators, and meters. Gas improvements must be completed by the utility provider: Unisource Energy Services or their designee via subcontract. Standards for the NG lines are not listed here, rather are the responsibility of the utility provider.

3. An optional bid-add to install a new groundwater drinking well onsite, and to abandon the existing well in accordance with the Arizona Department of Water Resources regulations.

1.2 LOCATION

A. This project is located at Fort Valley Experimental Forest (5735 W Fort Valley Road, Flagstaff, AZ, 86001). Located 8 miles outside the City of Flagstaff, Fort Valley Experimental Forest Headquarters can be accessed via US-180W/N Fort Valley Road.

1.3 GENERAL SITE CONDITIONS AND WEATHER

A. The elevation of the site is approximately 7,350 feet above mean sea level. The construction site experiences heavy snowfall and extremely cold temperatures, with snow on the ground typically from mid-September through May.

B. In-depth soil surveys have not been performed; however, rocks at the ground surface are evident throughout the area. The Contractor should expect to encounter such rock during excavation and grubbing operations. Blasting of rocks will not be permitted without special permission.

C. In-depth water table surveys have not been performed; however, if water is encountered during excavation, the Contractor shall perform adequate dewatering to keep the excavation free from water and dispose of the water without damage to property.

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1.4 USE OF PREMISES

A. General: Contractor shall have full use of premises for construction operations, including use of Project site, during construction period. Contractor's use of premises is limited only by Government's right to perform work or to retain other contractors on portions of the Project.

B. Use of Site: Limit use of premises to areas within the Contract limits indicated. Do not disturb portions of Project site beyond areas in which the Work is indicated.

1. Government Occupancy: Allow for Government occupancy of Project site.

2. Driveways and Entrances: Keep driveways and entrances serving premises clear and available to Government, Government's employees, and emergency vehicles at all times. Do not use these areas for parking or storage of materials.

Coordinate material staging locations with the COR.

a. Schedule deliveries to minimize use of driveways and entrances.

b. Schedule deliveries to minimize space and time requirements for storage of materials and equipment on-site.

C. Use of Existing Building: Maintain existing building in a weathertight condition throughout construction period. Repair damage caused by construction operations.

Protect building and its occupants during construction period.

1.5 WORK RESTRICTIONS

A. Nonsmoking Buildings: Smoking is not permitted within the facilities or within 25 feet (8 m) of entrances, operable windows, or outdoor air intakes.

1.6 CONTRACTOR’S RESPONSIBILITIES

A. Confine storage of materials to areas as approved by the CO.

B. Contractor shall provide adequate signing and barricades and take necessary safety measures to protect the public during all construction operations. Contractor shall minimize disturbance of all undisturbed areas.

C. Preservation of Natural Features: Confines all operations to work limits of the project.

Prevent damage to natural surroundings. Restore damaged areas, repairing or replacing damaged trees and plants, at no additional expense to the Government.

1. Provide temporary barriers to protect existing trees and plants and root zones.

2. Do not remove, injure, or destroy trees or other plants without prior approval.

Consult with CO and remove agreed-on roots and branches that interfere with construction.

3. Do not fasten ropes, cables, or guys to existing trees.

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4. Carefully supervise excavating, grading, filling, and other construction operations near trees to prevent damage.

D. Existing Utilities: Notify CO and utility companies of proposed locations and times for excavation.

1. Contractor shall be responsible for locating and preventing damage to known utilities. If damage occurs, repair utility at no additional expense to the Government.

2. Interruption of Existing Utility Service: Notify CO, 48 hours in advance of any interruption of existing utilities.

1.7 FIELD VERIFICATION

A. Field verify all new and existing dimensions affecting the work of this contract before ordering products.

1.8 PERMITS

A. Special permits for electrical work or any other permits required by County, State, or Federal laws or regulations shall be obtained by the Contractor.

PART 2 - PRODUCTS (NOT USED)

PART 3 - EXECUTION (NOT USED)

END OF SECTION 01110

FORT VALLEY UTILITY REPAIRS 01330 - 1

SUBMITTALS

SECTION 01330

PART 1- GENERAL

1.1 DESCRIPTION

A. Work Included:

1. Submittals are required under this contract for the purpose of establishing the final specifications for: (1) quality assurance; (2) design configuration; (3) per-formance standards; (4) other features necessary for a complete description of the Work to be performed.

B. Submittals shall be approved by the Contracting Officer. The Contractor shall not pur-chase, order, ship, install, or otherwise incur costs for a product or other work subject to submittal approval until after approval is granted by the Contracting Officer; the Government shall not be responsible for payment for any work, product, design, etc., not approved.

C. Rejection of any submittals by the Contracting Officer constitutes notice that a resub-mittal is required for the same purpose; rejections shall be explained.

D. The intent of the submittals is to provide complete information about the subject item sufficient for the Government to make a decision on that item's compliance with the purpose of the item and the general specification for that item. Descriptions contained in the approved submittals shall constitute an extension of the general specification concerning that item; and subsequent performance by the Contractor shall conform to submittal information except as allowed as substitutions in other sections as indicated.

1.2 RELATED WORK

A. Individual requirements for submittals may also be described in pertinent sections of the Technical Specifications.

1.3 QUALITY ASSURANCE

A. "Or Equal":

1. Where the phrase "or equal" or “equal as approved by the Contracting Officer," or "but are not limited to" occurs in the contract documents, do not assume that the materials, equipment, or methods will be approved as equal unless the item has been so specifically approved by the Contracting Officer.

PART 2 – PRODUCTS

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2.1 REQUIRED SUBMITTALS

A. It shall be the Contractor's responsibility to submit all items with such promptness as to cause no delay in the Work. Approvals must be obtained before starting any Work which involves them. The following submittals are required following award of the contract for review and/or approval pursuant to contract provisions:

1. One copy of the Work Progress Schedule listing main types of Work and antici-pated times for construction and completion.

2. One copy of the list of subcontractors proposed for the principal parts of the

Work.

3. Copies of Certification and other documentation which establish the qualifica-tions of proposed workers to perform the Work.

At a minimum, the contractor shall provide project submittals as shown on the Submittal Log be-low. Submittal requirements are listed throughout these specifications and the Drawings.

Log No.

Incidental to Pay Item(s)

Description of Submittal

Type of Submittal Requirement found in Specifi-cation No.

/Drawings

1 1 Schedule Schedule 01330

2 1 List of Subcontractors Listing 01330

3 1 Qualifications of Proposed Workers

Listing 01330

4 1 Contractor Quality Control Plan Plan 01450

5 1 Temporary Erosion and Sedimen-tation Control Plan Plan 01330, 01500

6 1 Material Storage/Staging Plan Plan and Description Drawings

3-32

Water Pipe, Fittings, Hydrants, Valve Boxes, Pressure Reducing Valve, Concrete Vault and all Ap-purtenances (Including Tracer Wire)

Material Submittals

02615, 02660, 02665, Plans

3-32

Pipe Bedding Material Material Certi-fications

02221

33-35

Concrete Mix Design

Mix Design Material Cer-tifications

03310, Plans

11 1 Closeout Documents As-Built Drawings 01770

FORT VALLEY UTILITY REPAIRS 01330 - 3

2.2 MANUFACTURER’S LITERATURE AND SHOP DRAWINGS

A. One (1) electronic copy of applicable submittals shall be provided to the COR through email, ftp site, or other electronic method. The information provided shall be adequate to determine compliance with the specifications. Literature which is not marked or otherwise designated to show the exact model, size, etc. which the Contractor pro-poses to use, will be returned by the Contracting Officer "without action." Circle or check applicable items on submittals. Do not use highlighter pens.

Submittals which are received from sources other than through the Contractor's office will be returned by the Contracting Officer "without notice."

Make submittals of Shop Drawings, Manufacturer's literature, tests, Schedules, sam-ples, substitution requests, and other items in accordance with the provisions of this Section.

PART 3 – EXECUTION

3.1 IDENTIFICATION OF SUBMITTALS

A. Consecutively number all submittals. Cross reference all submittals with the specific Section number of the specifications.

1. When material is resubmitted for any reason, transmit under a new letter of transmittal with a new submittal number.

On submittals, cite the original submittal number for reference.

Accompany each submittal with letter of transmittal showing all information for iden-tification and checking.

On at least the first page of each submittal, and elsewhere as required for positive identification, show the submittal number in which the item was included.

Where contents from manufacturers include data not pertinent to the submittal, clearly show which portions of the contents are being submitted for review.

Maintain an accurate submittal log for the duration of the Work, showing current sta-tus of all submittals at all times. The submittal log shall be made available to the Con-tracting Officer for review upon request.

3.2 GROUPING OF SUBMITTALS

A. Make construction drawing submittals in a group containing all associated items to as-sure that information is available for checking each item when it is received.

1. Partial submittals may be rejected as not complying with the provisions of the contract.

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B. The Contractor may be liable for delays caused by rejected submittals.

END OF SECTION 01330

Fort Valley Utility Repairs 01740 - 1

CLEANING AND WASTE MANAGEMENT

SECTION 01740

CLEANING AND WASTE MANAGEMENT

PART 1 – GENERAL

1.1 DESCRIPTION

A. All clean-up work including all materials, labor, and equipment necessary for cleaning and debris removal.

1.2 DISPOSAL REQUIREMENTS

A. Conduct cleaning and disposal operations to comply with local codes, ordinances and regulations.

B. Dispose of all debris and materials at a site approved by the USFS, Contracting Officer, and Local Authority.

C. The Contractor shall be responsible for all costs and fees associated with disposal of waste materials and debris.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Use only those cleaning materials which will not create hazards to health or property and which will not damage surfaces.

B. Use cleaning materials only on surfaces recommended by cleaning material manufacturer.

PART 3 – EXECUTION

3.1 DURING CONSTRUCTION

A. Execute periodic cleaning to keep the work site and adjacent properties free from accumulations of waste materials and trash.

B. Provide on-site containers for the collection of waste materials and trash.

3.2 DUST CONTROL

A. Clean interior spaces prior to the start of finish painting and continue cleaning as needed until painting is finished.

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CLEANING AND WASTE MANAGEMENT

B. Schedule operations so that dust and other contaminants resulting from cleaning process will not fall on wet or newly-coated surfaces.

3.3 FINAL CLEANING

A. At the completion of the project, or prior thereto if so directed by the Contracting Officer, the Contractor shall be responsible for complete cleaning of those portions of the project and site which his work effects.

B. Sweep and clean concrete slabs thoroughly and remove all marks, stains, fingerprints, dust, dirt, paint drippings and other construction residue from all surfaces. Clean and touch up all painted work. Clean site and remove excess debris, branches, rocks, and trash.

C. Prior to final inspection by Contracting Officer, Contractor shall conduct his own inspection of exposed interior and exterior surfaces, and all work areas, to verify that the entire work is clean and ready for inspection and use by the Government.

3.4 RESTORATION OF DAMAGED PROPERTY

A. To the extent that any roads, vegetation, structures, utilities or other items are damaged or displaced by the Contractor's operations, these shall be restored to their original or better condition prior to Final Inspection. This shall include both on-site and off-site items. Any damage which is severe enough to disrupt community travel or utilities shall be repaired by the Contractor immediately, when requested by the Contracting Officer.

END OF SECTION 01740

Fort Valley Utility Repairs 01770 - 1

CLOSEOUT PROCEDURES

SECTION 01770

CLOSEOUT PROCEDURES

PART 1 – GENERAL

1.1 DESCRIPTION

A. This Section describes an orderly and efficient transfer of the completed work to the

USFS.

1.2 PROCEDURES

A. Substantial Completion

1. Substantial completion is defined as that point at which the work is basically complete and ready for use. All specified products shall have been installed and are functionally operational. Remaining work shall be extremely minor or require seasonal opportunity to complete or subject to delayed completion items and shall not impair the functionality of the site.

B. The Contractor shall notify the Contracting Officer, in writing as required by the General Conditions, as to the date when in its opinion all or a designated portion of the work will be substantially completed and ready for inspection.

C. Within a reasonable time after receipt of such notice, the Contracting Officer will inspect to determine status of completion.

D. Should the Contracting Officer determine that the Work is not substantially complete:

1. The Contracting Officer promptly will so notify the Contractor in writing, giving the reasons therefore.

2. The Contractor shall remedy the deficiencies and notify the Contracting Officer when ready for reinspection.

3. The Contracting Officer will reinspect the Work.

4. The Contractor shall be liable for expenses incurred by the USFS for reason of such Substantial Completion Reinspection.

E. When the Contracting Officer concurs that the Work is substantially complete:

1. The Contracting Officer will prepare a Punch List of items to be completed or corrected, as verified by the CO.

2. The Contracting Officer will submit the Punch List to the Contractor for their written acceptance of the responsibilities assigned to them in the Punch List.

3. Once the Contractor executes the Punch List, the Contracting Officer must be notified in writing.

F. Immediately following approval of Substantial Completion, the Contractor shall submit the following documents.

1. Final Pay Request with final adjustment of accounts stating all adjustments to the contract sum.

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CLOSEOUT PROCEDURES

2. Previous change orders.

3. Deductions or uncorrected work.

4. Other adjustments.

A. Contractor's Certificate and Release B. Operation and Maintenance Manuals.

C. As-Built Drawings and Submittals.

G. Final Inspection: Final Inspection shall be defined as that period at which all work in the Contract is 100% complete and no minor details remain to be performed.

1. Final inspection shall not be made until all work under the contract is completed.

The Contractor shall notify the Contracting Officer in writing, at least 4 days prior to the date requested on which the work will be ready for final inspection.

2. Following notification, the Contracting Officer will make an inspection of the Contractor's work and record any deficiencies on the Final Punch List. The Contractor shall immediately correct these deficiencies at her/his own expense and notify the Contracting Officer in writing when all items have been corrected. The Contracting Officer will re-inspect the work to assure correction of all deficiencies before release of amounts retained for minor, seasonal or delayed items. The Contractor shall be liable for all costs of reinspection when the Substantial Completion Punch List deficiencies have not been corrected at the time of the Final Inspection and reinspection is required.

3. Any reasonable delay by the CO in making final inspection shall not relieve the Contractor of responsibility for the work nor shall the Government be held responsible for damages or claims for compensation on account of continuing overhead, maintenance, etc., occasioned by such a delay.

H. Final Pay Request will be processed for payment upon final inspection and Contracting Officer’s certification that work under the contract is 100% complete.

PART 2 - PRODUCTS

2.1 WARRANTY

A. The Contractor warrants the products delivered under the contract to be free from defects in design, material, or workmanship, and against damage caused prior to final inspection. Unless otherwise specified, this warranty extends for a period of one (1) year from the date of final acceptance.

B. The Contractor shall promptly repair or replace all defective or damaged items delivered under the Contract. The Contractor may elect to have any replaced item returned to his plant at his expense.

END OF SECTION 01770

Fort Valley Utility Repairs 02221 - 1

TRENCH EXCAVATION AND BACKFILL FOR PIPELINES & APPURTENANT STRUCTURES

SECTION 02221

TRENCH EXCAVATION AND BACKFILL FOR PIPELINES & APPURTENANT

STRUCTURES

1.1 DESCRIPTION

A. This work is the excavation, trenching, and backfilling for pipelines and appurtenances. It includes all clearing, grubbing, site preparation, removal, and disposal of debris from the excavation, handling and storing materials for fill and backfill, all bracing, shoring and trench protection, construction dewatering, all backfill, subgrade preparation, final grading, site dressing, and cleanup.

1.2 REFERENCES

A. The current publications listed below form a part of this specification.

AASHTO T99 Moisture-Density Relations of Soils Using 5-lb (2.5kg) Rammer and 12-inch (305mm) Drop

ASTM D698 Laboratory Compaction Characteristics of Soil Using Standard Effort

(12,400 ft-lbf/ft3)(600 kn-m/m3))

AASHTO T191 Density of Soil In-Place by the Sand-Cone Method

(ASTM D1556)

AASHTO T310 In-Place density and water content of the soil and soil aggregate (ASTM D6938) by Nuclear Method (Shallow Depth)

AASHTO T11 Materials Finer Than 0.075mm (No. 200) Sieve in Mineral (ASTM C117) Aggregates by Washing

AASHTO T27 Sieve Analysis of Fine and Coarse Aggregate

(ASTM C136)

AASHTO T89 Determining the Liquid Limit of Soils

AASHTO T90 Determining the Plastic Limit and Plasticity Index of Soils

ASTM D4318 Test Method for Liquid Limit, Plastic Limit, and Plasticity Index of Soils

ASTM D4253 Maximum Index Density and Unit Weight of Soils Using a Vibratory

Tube

Fort Valley Utility Repairs 02221 - 2

STRUCTURES

ASTM D4254 Minimum Index Density and Unit Weight of Soils and Calculation of Relative Density

1.3 TESTING

A. Material Submittals

1. Submit to the Engineer material quality test results, including Type 1

Bedding gradation and plasticity index, and Type 2 Bedding gradation.

2. .

3. If applicable, submit a blasting plan to the Engineer.

PART 2 - PRODUCTS

2.1 PIPE BEDDING MATERIALS

A. Type 1 Pipe Bedding

1. Type 1 Pipe Bedding includes the material placed from 4 inches (10

cm) below the bottom of the pipe to 6 inches (15 cm) over the pipe.

2. Provide Type 1 Bedding consisting of crushed stone or gravel, which is free of cementitious substances or thin, flat particles in an amount that would cause the material to cake, pack, or otherwise form and unyielding support for the pipe.

3. Provide imported granular material with a gradation as follows and a maximum plasticity index of 6, determined by AASHTO T89 and T90 or by ASTM D4318.

Percent by Weight Passing

Sieve Size % Passing

1" (25 mm) 100 3/4” (19.0 mm) 90 - 100 3/8” (9.5 mm) 20 - 55 No. 4 (4.75 mm) 5 - 10 No. 8 (2.36 mm) 0 - 5

4. Crush material so that the percentage of fractured particles in the finished product is as constant and uniform as practical. Crush to produce material where at least 50 percent of the material retained on the No. 4 sieve has at least one fractured face.

5. To prevent migration of material from around the pipe, do not use sand, sandy gravel, or material composed mainly of sand for bedding material in the pipe zone where groundwater is or will be present or where existing material contains voids which would allow migration.

Where trench excavation encounters wet or unstable material, Type 1

Fort Valley Utility Repairs 02221 - 3

STRUCTURES

Pipe Bedding must be well graded, free-draining, and non-plastic.

6. Refer to the Special Provisions and details in the Drawings for other requirements.

B. Type 2 Pipe Bedding

1. Type 2 Pipe Bedding is used as directed by the Engineer to replace unsuitable material encountered in the trench bottom.

2. Place Type 2 Pipe Bedding from the bottom of the Type 1

Bedding material to the depth required to adequately support the pipe.

1. Type 2 Bedding consists of granular material meeting the following gradation and having a maximum plasticity index of 6 and a maximum liquid limit of 25 percent.

Percent by Weight Passing

Sieve Size % Passing

1" (25 mm) 100 3/4” (19.0 mm) 90 - 100 3/8” (9.5 mm) 20 - 55 No. 4 (4.75 mm) 5 - 10 No. 8 (2.36 mm) 0 - 5

2.2 TRENCH BACKFILL MATERIALS

A. Materials from Trench Excavation

1. Backfill material obtained from trench excavations must be free of cinders, ash, refuse, organic or frozen material, boulders, or other deleterious materials. Backfill materials and placement are further described in the Execution Section of this specification.

B. Imported Backfill Material

1. Imported backfill material is from borrow source(s) outside the project limits and is used when, in the opinion of the Engineer, an adequate volume of suitable backfill material is not available within the project limits. Imported Backfill Materials must comply with the requirements of Section 2.2.A.

2.3 DETECTABLE BURIED WARNING TAPE

A. Detectable buried warning tape is to have a minimum 6 inch (15cm) width and 5 mil (0.12mm) thickness and a solid aluminum core running the full length and width of the tape enclosed in a color coded inert plastic jacket, impervious to alkalis, chemical reagents and solvents in the soil. The tape is to meet APWA/ULCC Color Code requirements and is to have a maximum 36-inch(90cm) imprint.

Fort Valley Utility Repairs 02221 - 4

PART 3 - EXECUTION

3.1 PROTECTION OF EXISTING PROPERTIES

A. General

1. Take precautions to protect all adjoining private and public property and facilities, including underground and overhead utilities, curbs, sidewalks, driveways, structures, and fences. Restore or replace all disturbed or damaged facilities to its original condition at the Contractor's expense.

2. Contact utility owners using the Arizona One Call System for utility locates before starting work. Protect the utilities exposed during the work and prevent damaging underground utilities adjacent to excavations. Immediately notify the utility owner of any construction damage. Repairs of damage to marked utilities are at the expense of the Contractor.

3. Re-locate existing water mains, sanitary sewers, and storm drains shown on the plans that conflict with new pipelines or structures, as indicated in the contract documents. No separate payment will be made for this work unless shown as a payment item. If the Owner authorizes the relocation of mains or sewers, which are not indicated in the bid documents, and the Engineer determines the work was not included in the original contract, payment will be made under the applicable sections of the General Conditions.

4. Cut and replace existing service lines interfering with trenching operations only with the Engineer's permission and at the Contractor's expense.

5. Show all repaired and/or adjusted water and sewer lines on the As-Built Plans.

6. Protect existing water and sewer mains and water and sewer services from freezing at all times during construction.

B. Privately Owned Utilities

1. If any existing private utility interferes with the work in either alignment or grade and has to be moved, the work will be performed by the appropriate Utility Owner unless otherwise specified in the contract documents. Such private utilities may include gas mains, underground electrical and telephone cables, telephone poles, light poles, etc.

2. If, however, such private utility relocation is performed by the Contractor, and the relocation is not a separate payment item, payment will be made under the Section 02221 conditions covering such changes.

3. Such payment will be made only if the work is determined by the Engineer to be a change from the original contract work scope.

C. Existing Structures

1. Prevent damage to existing buildings or structures in the work area.

Repair all construction related damage to the satisfaction of the Owner.

D. Existing Overhead Utilities

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STRUCTURES

1. Use extreme caution to avoid conflict, contact, or damage to overhead utilities during the work.

E. Existing Trees

1. The Critical Root Zone (CRZ) is defined as the area underneath the edge of canopy. To the maximum extent feasible, the Contractor shall adjust alignments of proposed utility lines to limit disturbance within the CRZ.

Where CRZ disturbance is unavoidable, the Contractor shall notify the Contracting Officer and mark the tree with flagging tape for removal by the Government.

F. Exploratory Excavation

1. The location of existing buried public utilities may need to be verified by exploratory excavation before construction.

2. Exercise care to prevent damaging all utilities and repair any utility damage caused by exploratory excavation.

G. Pavement Removal and Stripping

1. Where trench excavation or appurtenant structure excavation requires removing curb and gutter, concrete sidewalks, asphalt concrete pavement, or Portland cement concrete pavement, cut the concrete or pavement in a straight line parallel to the excavation's edge using a spade-bitted air hammer, concrete saw or other suitable equipment to produce a straight, square and clean break. Re-cut edges broken during construction, before concrete or paving operations.

2. For trenches passing through the existing pavement, cut the pavement along a neat vertical line at least 12 inches (30cm) from the trench edge.

Where the neat line cut is less than 3 feet (0.9m) from the edge of the existing pavement, remove and replace the entire pavement section between the trench and edge of the pavement.

3. Dispose of the asphalt concrete and/or Portland cement concrete debris off-site according to applicable state and local regulations.

H. When excavating across existing gravel streets or other developed surfaces, remove the surfacing material full depth and stockpile for inclusion in the trench backfill or legally dispose of the surfacing material.

I. When excavating across cultivated or sodded areas, remove full topsoil depth or a maximum 12-inch (30cm) depth, whichever is less, and stockpile for possible project use.

J. Re-sod or reseed, as specified in the contract documents, all established lawn areas cut by trenching or damaged during the construction, according to Section 2910, to the Engineer's satisfaction.

3.2 MAINTENANCE OF FLOWS

A. Maintain the flow of sewers, drains, and watercourses encountered during construction. Restore culverts, ditches, fences, crosswalks, and structures

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STRUCTURES

disturbed by construction to their original condition upon completion of the work.

3.3 TRENCH EXCAVATION

1. Meet current OSHA Safety and Health Standards for all excavation, trenching, shoring, and related work.

2. Excavate at the specified locations for pipeline installations and appurtenant structures.

3. Crossings under sidewalks or curbs may be made by tunneling if approved by the Engineer. If a portion of a sidewalk or curb is removed, use a concrete saw to make joints, compact the backfill as specified, and replace the removed Section with a new concrete sidewalk or curb.

4. During excavation, stockpile backfill materials away from the trench banks to assure trench wall stability. Stockpile excavated materials on only one side of the trench without obstructing existing fire hydrants, valves, manholes, and other appurtenances. Assure surface drainage of adjoining areas is unobstructed.

5. Remove and dispose of all excess or unsuitable excavated materials.

6. Prevent surface water from flowing into excavations. Promptly remove all water accumulating in trench excavations. Do not permit water to accumulate in any open trench. Remove and re-lay all pipe out of alignment or grade caused by trench flooding.

7. Grade the trench bottoms to the specified lines and grades. Assure bedding material provides uniform bearing and support for each pipe section along its entire length. Excavate for bell and joints after the trench bedding is graded, limiting the excavation to the required length, depth, and width for making the particular type of joint used. Backfill over- excavations with Type 2 Bedding Material.

8. No classification of trench excavated material materials will be made.

Excavation and trenching work includes the removal and subsequent handling of all earth, loose or cemented gravel, loose or solid rock, and other materials excavated or otherwise removed in the performance of the contract work, regardless of the type, character, composition, or condition thereof. All materials excavated or otherwise removed, including asphalt, curb, gutter, sidewalk, soils, etc., will become the property of the Contractor, who will be responsible for environmentally sound disposal of said material in accordance with state and federal regulations.

9. The use of trench digging machinery is permitted, except in places where its operation is likely to cause damage to existing structures or features, in which case hand methods are to be employed.

B. Trench Dimensions

1. Excavate to the trench dimensions specified below.

2. Width

a. Excavate to provide room to install and join the pipe as specified. The minimum trench width is 3'-6" (1.1m), for outside pipe diameters of 18 inches (0.5m) or less. The minimum trench

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STRUCTURES

width is 2'-0" (0.6m) plus the outside pipe diameter, for pipe sizes exceeding 18 inches (0.5m). Maximum trench width may be specified in the contract documents.

b. If the trench is excavated wider than the specified minimum, provide Type 1 Pipe Bedding for the additional width to yield a consistent backfill for the entire width of the trench or take such other measures as the Engineer may direct to protect the pipe against the crushing forces of trench backfill at the Contractor's expense.

3. Depth

a. Excavate the trench as required for the invert grade or pipe bury as specified in the contract documents, plus 4 inches (10cm) for the Type 1 Pipe Bedding. If bedrock, boulders, or large stones are encountered at the bottom of the trench, excavate at least 6 inches(15cm) below the bottom of the pipe for backfilling with Type 1 Pipe Bedding.

C. Soft or Unsuitable Trench Subgrade

1. When soft or unstable material is encountered at the trench subgrade, which will not uniformly support the pipe, excavate the material to the depth directed by the Engineer and backfill to trench subgrade elevation with Type 2 Pipe Bedding.

D. Blasting

1. Obtain Engineer approval to blast for excavation. If approved, the Engineer will establish the time limits blasting will be permitted.

2. Use the utmost care to protect life and property during blasting. Use only a licensed blaster with experience in the type of blasting required for the work.

3. Safely and securely store all blasting materials meeting local laws and ordinances, and clearly mark all storage places "Dangerous Explosives."

Do not leave any explosives where they could endanger persons or property.

4. Blasting Rock in Trenches

a. When blasting rock in trenches, cover the blasting area with earth backfill or approved blasting mats. Before blasting, station workers and provide danger signals to warn people and stop vehicles.

b. Assume responsibility for all damage to property and injury to persons resulting from blasting or accidental explosions during the work.

c. Furnish the following information to the Owner and Engineer at least 48 hours before the commencement of blasting operations:

Name of the Contractor's powder man, powder man's experience, type of shot, type of explosives and detonator being used, proof of insurance covering liability for such operation, traffic control plans and planned procedures for protecting the public.

5. Assure the blasting plan meets federal, state, and local ordinances.

Obtain all required permits before blasting starts.

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E. Pavement Damage Cause by Equipment

1. Equip all track-mounted equipment operated on pavement surfacing with pads to prevent pavement damage.

2. Remove and replace all pavement damaged during construction by the Contractor's equipment, or the use thereof, to at least a depth of 1 inch (25 mm). Patches will not be allowed less than 1 inch (25 mm) in thickness.

3. Replace all asphalt pavement damaged during construction outside of restoration pay limits in conjunction with asphalt restoration and as otherwise required by the Engineer. Place asphalt to produce a final surface uniform in texture and consistent with the line and grade of adjacent pavement or as directed by Engineer. No compensation will be allowed for removal and replacement of damaged pavement outside of the pay limits for asphalt restoration.

F. Shoring, Bracing, and Sheeting

1. Provide all shoring, bracing, and tight sheeting required to prevent caving and protect workers, meeting current Occupational Safety and Health Act Requirements, and to protect adjacent property and structures. The cost of this work is included in the price of trench excavation.

G. Excavation for Appurtenances

1. Make excavations for manholes, hydrants, structures, and other appurtenances of the size and depth to permit compacting of backfill on all sides to the specified density. The requirements for removing water and other applicable portions of these specifications apply to excavation for appurtenances.

3.4 DEWATERING

1. Furnish all necessary labor, equipment, and incidentals necessary to dewater the project site during construction.

2. Keep all excavation dry and free from water during construction and the placement of materials. Do not place pipe, bedding, or backfill materials below the groundwater elevation established by dewatering operations.

Do not allow groundwater or stormwater to enter or flow through the underground piping during installation.

3. The cost of dewatering operations will be incidental to the cost of pipeline and appurtenance installation, and no additional payment will be made for dewatering. Consider shifts in the groundwater level caused by changing seasons or local conditions in estimating the cost of dewatering operations, as no additional payments will be made for fluctuating groundwater levels.

4. Protect all structures that could be potentially impacted by dewatering operations. Repair any damage to structures caused as a result of dewatering at Contractor's expense.

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B. Discharge

1. Do not discharge or dispose of water from dewatering operations in such a manner as to flood existing landscaped areas, graveled areas, or structures unless approved by Engineer. Written permission from the appropriate landowner shall also be required for discharge or disposal on private property.

2. It is the Contractor's responsibility is to comply with requirements and regulations of federal, state, and local agencies that govern areas affected by dewatering of the construction site and application for and maintenance of any required permits.

3.5 EXCAVATION STABILITY AND SAFETY

A. The stability of construction excavations and associated worker safety, including slope geometry and shoring/bracing considerations, are the Contractor's responsibility. Meet current OSHA regulations. This may require the design of temporary slopes and/or shoring by a licensed professional engineer.

3.6 TRENCH FILLING AND BACKFILLING

1. Backfill all trenches as specified immediately after grade, alignment, and pipe jointing has been inspected and approved by the Engineer. Conduct any pipe testing as specified in the respective water distribution, sewerage/drainage sections. Correct all defects discovered by tests prior to backfilling.

2. Storage of all imported backfill materials, including protecting said materials from adverse conditions that would disqualify them from use under these specifications, is the responsibility of the Contractor.

B. Pipe Bedding Placement

1. Type 1 Bedding.

a. Place Type 1 Pipe Bedding material 4 inches (10 cm) under, around the pipe, and to a point 6 inches (15 cm) above the top of the pipe in 6 inch (15 cm) lifts, using hand or other compaction methods without damaging or disturbing the pipe including mains and service lines and all appurtenances.

b. Place bedding material in equal lifts on both sides of the pipe for the full trench width. Thoroughly compact each lift of pipe bedding by tamping, vibration, slicing with a shovel, rodding, or by a combination of these methods. Take special care to assure complete compaction under the haunches of the pipe.

2. Type 2 Pipe Bedding.

a. Use Type 2 Pipe Bedding described in PRODUCTS SECTION as specified or as directed by the Engineer to replace unsuitable material encountered in the trench bottom, placing it from the bottom of the Type 1 Bedding material to the depth required to adequately support the pipe.

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STRUCTURES

3. Separation Geotextile

a. Place Separation Geotextile where shown on the plans or where directed by the Engineer.

C. Trench Backfill

1. After the pipe bedding materials are placed and compacted as specified, backfill the trench.

a. Use backfill material free of cinders, ash, refuse, organic or frozen material, boulders, or other deleterious material.

b. From the top of the Type 1 Bedding to 6 inches (15 cm) below the ground surface, or the subgrade elevation, material containing stone up to 8 inches (20 cm) in the greatest dimension may be used.

c. Cost of screening, drying, or moistening excavated backfill to comply with specifications will be considered incidental to the Contractor's bid price per linear foot of pipe and service lines and unit prices for appurtenances, and no additional payment will be made for such work.

2. Trench backfill from the top of the pipe bedding to ground surface or to the street subgrade is separated into three classifications.

a. Type A Trench Backfill is compacted backfill typically used in streets or paved areas.

b. Type B Trench Backfill is typically used for unpaved alleys, cultivated areas, borrow pits, unimproved streets or other un-surfaced areas, and other areas where compaction is less critical.

c. Type C Trench Backfill is typically used in open and unimproved areas outside of the public right-of-way.

3. Meet the backfill and compaction requirements for all of the backfill types described in the contract documents.

4. Watering

a. Apply uncontaminated water, when required, at the locations and in the amounts required to compact the backfill material to the specified requirements. Maintain an adequate water supply during the work. Assure the equipment used for watering is of the capacity and design to provide uniform water application.

b. Apply water during the work to control dust and to maintain all embankment and base courses in a damp condition in accordance with these contract documents.

c. Water required for compacting trench backfill may be obtained from the municipal system if approved by the Owner or from other sources.

5. Remove, replace, and re-compact backfill in trenches where settlement has occurred as directed by the Engineer at the Contractor's expense.

6. Trench backfill types are designated as follows:

a. Type A Trench Backfill. Place trench backfill in maximum 8 inch

(20 cm) compacted lifts within 3 percent of optimum moisture content and compact to at least 95 percent of maximum dry density determined by AASHTO T99 or by ASTM D698. For materials that do not exhibit a typical well-defined moisture-density curve, compact backfill to 70 percent relative density as

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STRUCTURES

determined by ASTM D4253 and D4254.

b. Type B Trench Backfill. Place trench backfill in maximum 8 inch

(20 cm) compacted lifts within 3 percent of optimum moisture content, and compact to at least 90 percent of maximum dry density determined by AASHTO T99 or by ASTM D698. For materials that do not exhibit a typical well-defined moisture-density curve, compact backfill to 50 percent relative density as determined by ASTM D4253 and D4254.

c. Type C Trench Backfill. Place and compact Type C Trench Backfill in maximum 12-inch (30 cm) lifts at densities equal to or greater than the densities of adjoining undisturbed soil.

Mound earth over the trench top, if so directed by the Engineer.

In cultivated areas, place stripped topsoil uniformly over the backfilled trench to the original depth. Do not compact the topsoil, but grade to provide a smooth surface conforming to the adjoining ground surfaces.

d. Flowable Fill. Place flowable fill as trench backfill as shown in the contract documents or as directed by the Engineer. Flowable fill may also be used as a construction expedient, substituting for any type of trench backfill, subject to approval by the Engineer, and at the expense of the Contractor.

D. Replacement of Unsuitable Backfill Material

1. Remove and dispose of excavated soils that are saturated, contain deleterious materials, or have characteristics that, in the opinion of the Engineer, render the soils unsuitable as backfill and/or which cannot be readily conditioned or dried to be made suitable.

2. Replace unsuitable soils with material obtained from trench excavations within the project limits at the expense of the Contractor.

3. If suitable replacement material is not available within project limits, notify the Engineer. The Engineer will quantify the extent of any unsuitable soils to be removed and replaced with material from an approved source, to be paid for as Imported Backfill Material, and provide written notification of the approved quantities to the Contractor.

Payment for Imported Backfill Material will not be approved if the Contractor fails to notify the Engineer and/or proceeds with removal and disposal of unsuitable material prior to receiving written notice from the Engineer.

4. Provide imported backfill material with a gradation as follows and a maximum plasticity index of 10, determined by AASHTO T89 and T90 or by ASTM D4318. Imported backfill may not contain rock measuring greater than 6 inches (15 cm) in the greatest dimension.

Percent by Weight Passing

Sieve Size % Passing

1" (25 mm) 70 -100 No. 4 (4.75 mm) 40 - 80 No. 10 (2.00 mm) 25 - 60

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No. 200 (0.075 mm) 2 - 35

5. Place and compact all imported material according to the applicable backfill specification requirements.

E. Backfill of Appurtenances

1. Place and compact backfill for appurtenances to finished grade around manholes, inlets, valve boxes, and other underground items without disturbing appurtenance alignments.

2. Meet the backfill material, placement, and compaction requirements specified for the adjoining trench.

F. Detectable Buried Warning Tape

1. Provide warning tape, as described in this Section. Bury tape a maximum of 18 inches (45 cm) below finish surface grade.

3.7 SURVEY MARKERS AND MONUMENTS

A. Protect all survey markers and monuments. Protection includes marking with flagged high lath and supervising work near markers and monuments. Do not disturb monuments without prior approval from the Engineer.

B. Replace all Contractors disturbed or destroyed survey markers or monuments not approved during construction, using a licensed land surveyor. See Section 01050 for details on survey marker protection/disturbance.

3.8 CLEANUP

A. As work progresses, remove debris and complete to finish grade each portion of the work. Once the work is complete, clear debris and finish the entire site to smooth, uniform slopes presenting a neat and workmanlike appearance. Remove and dispose of all rocks brought to the surface during excavation or backfilling.

B. Dispose of vegetation; coarse debris resulting from pavement or sidewalk removal; stones, junk, debris, and other materials encountered in excavation work; and other similar waste materials away from the site of the work at the Contractor's expense.

3.9 TIME AND DISTANCE OF OPEN TRENCHES

A. Perform the work so that trenches will remain open the minimum time required to accomplish the work.

B. Do not begin trench excavating until appropriate compaction equipment is at the excavation site.

C. The maximum permissible distance between backfilling/compaction operations

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STRUCTURES

and the end of newly installed pipe is 100 feet (30 m) in existing streets (and/or alleys) and 200 feet (60 m) in all other areas.

D. The maximum distance between the newly installed pipe and the excavator is to be 100 feet (30m) in existing streets (and/or alleys) and 200 feet (60m) in all other areas.

E. For each workgroup consisting of a trench excavator, a pipe laying crew, and a backfilling/compaction crew, the maximum allowable open ditch at any time is 200 feet (60 m) in existing streets (and/or alleys) and 400 feet (120 m) in all other areas.

F. The maximum distance behind the end of the new pipe is 1,500 feet (460m) for gravel surfacing replacement, base placement, or pavement replacement.

G. At the completion of each working day, fill all trenches and/or provide safety netting, Jersey barrier, and other barricades required for public safety.

3.10 DRAINAGE CROSSINGS

A. Where trenches are constructed in or across roadway ditches or other watercourses, protect the backfill from surface erosion by adequate means.

Where the grade of the ditch exceeds 1 percent, prevent erosion by a suitable method approved by the Engineer. Backfill trenches in such a manner that water will not accumulate in unfilled or partially filled trenches.

B. Remove all material deposited in roadway ditches or other water courses crossed by the trench immediately after backfilling is completed and restore the Section, grades, and contours of such ditches or watercourses to their original conditions, in order that the surface drainage is obstructed no longer than necessary.

END OF SECTION

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WATER SUPPLY WELLS

SECTION 02521

WATER SUPPLY WELLS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplemen-tary Conditions and Division 1 Specification Sections, apply to this Section.

1.2 SUMMARY

A. This Section includes the following:

1. Cable-tool, Rotary drilled, Reverse-rotary drilled, or Driven water supply wells.

2. Submersible-type pumps for water supply wells.

3. Well Casings

4. Grout

5. Water Well Screens

6. Pack materials

7. Associated specialties.

B. Related Sections include the following:

1. Sections 02660 Water Distribution Systems

1.3 DEFINITIONS

A. The following are industry abbreviations for plastic materials:

1. ABS: Acrylonitrile-butadiene-styrene plastic.

2. PA: Polyamide (nylon) plastic.

3. PE: Polyethylene plastic.

4. PP: Polypropylene plastic.

5. PVC: Polyvinyl chloride plastic.

1.4 PERFORMANCE REQUIREMENTS

A. Minimum Tested Water Supply Well Performance Capacity: 7 gallons per minute.

1.5 SUBMITTALS

A. Product Data: Submit certified performance curves and rated capacities of selected well pumps and furnished specialties for each type and size of well pump indicated.

B. Shop Drawings: Show layout and connections for well pumps.

Fort Valley Utility Repairs 02521 - 2

1. Wiring Diagrams: Power, signal, and control wiring.

2. Setting Drawings: Include templates and directions for installing foundation bolts, anchor bolts, and other anchorages.

3. Project Record Documents: Record the following data for each water supply well:

a. Casings: Material, diameter, thickness, weight per foot (meter) of length, and depth below grade.

b. Screen: Material, construction, diameter, and opening size.

c. Pumping Test: Static water level, maximum safe yield, and drawdown at maximum yield.

d. Log: Formation log indicating strata encountered.

e. Alignment: Certification that well is aligned and plumb within specified tolerances.

C. Field Quality-Control Reports: Describe…