Technical_Specifications.pdf

UTILITIES DEPARTMENT

UTILITIES FIBER ENGINERRING DIVISION

ON-CALL FIBER UTILITY TRENCH & SUBSTRUCTURE

INSTALLATION CONTRACT

INVITATION FOR BIDS (IFB) NUMBER TBD

PART 8

TECHNICAL SPECIFICATIONS

TABLE OF CONTENTS

TITLE PAGE

SECTION 1 - GENERAL

Scope 3 General Description 3 Definitions and Terms 3 Contractor Responsibility 3 Progress of Work 4 Approval of Work 4 Sufficiency of Specifications or Plans 4 Permit 4 Payment 5 Schedule 5

SECTION 2 - SAFETY, SITE AND TRAFFIC CONTROL

Scope 5 Safety 5 Traffic Control 7 Sanitation Facilities 8 Storage of Equipment and Materials 9 Water Use 9 Cleanup 9 Storm Water Pollution Prevention 10

SECTION 3 - TRENCH, MANHOLE AND SPLICE BOXES

Scope 10 Removal of Street Surface, Concrete, Sidewalk, Driveways, Curbs and Gutters 11 Trench Excavation 11 Clearance and Cover 12 Installation of Steel Casing 12 Backfilling 12 Pavement, Sidewalk and Curb Replacement 12 Construction of Manhole 13 Waterproof Manhole 13 Installation of Splice Boxes 13 Grading of Manholes & Splice Boxes 13

SECTION 4 - CONDUIT INSTALLATION

Scope 14 General 14 Materials 14 Installation 14 Concrete Encasement 15 Spacers 16

SECTION 5 - DIRECTIONAL BORING

Scope 16 General 16 Materials 16 Directional Boring System 16 Installation of Conduit 17

SECTION 6 - SCOPE OF SERVICES

2026-2029 On-Call Fiber Utility Trench & Substructure Installation Contract 18 General 18 Schedule 19 Invoice 19

SECTION 1 - GENERAL

A. Scope

1. This Specification covers the general requirements to perform the necessary work and furnish various specified materials for the installation of underground fiber duct systems for the City of Palo Alto.

B. General Description

1. This Specification shall include the City's written instructions which cover construction of the underground duct system.

C. Definitions and Terms

1. All terms and abbreviations used in this specification have the same meaning as defined in the General Conditions.

D. Contractor Responsibility

1. All required survey work and field marking of box locations shall be provided by the City, but potholing shall be the responsibility of the Contractor. The Contractor shall contact Underground Service Alert (USA) 800-227-2600 prior to beginning work to have the existing underground utilities located. The Contractor shall also be responsible to completely remove all USA markings and all other markings associated with the project from pavement, sidewalk, curbs, driveways, etc.

2. The Contractor shall assume all responsibility for the completion of the work and, unless otherwise specified, shall furnish all labor, equipment, materials, trucks, tools, and other facilities and services to complete the work in accordance with these Specifications and applicable sections of the most recent version of the City of Palo Alto Standard Drawings and Specifications.

3. The Contractor shall assume the risk of loss, theft or damage to all materials delivered to or accepted by him until such materials have been completely installed and accepted (in writing) by the City. The Contractor's liability shall include damage to or loss of material in his possession or material being loaded, unloaded, or handled by him.

4. The Contractor shall avoid disputes with property owners or others, and any objections made by the public because of the manner in which the work is being done shall be submitted to the Engineer for decision before the Contractor proceeds with the work in question. The Contractor shall perform his work to conform to all reasonable requests of the adjacent property owners.

5. The Contractor shall operate his equipment in strict accordance with the requirements of the City of Palo Alto.

E. Progress of Work

1. The Contractor shall provide at his\her expense, a construction headquarters at a location approved by the Engineer with secure facilities and storage area for conduit, manholes, splice boxes, backfill sand and other miscellaneous materials.

2. Commencement of the Work shall begin on the date specified in the Notice to Proceed.

3. If the Contractor is delayed in the progress of the work by any act or neglect of the City, or any cause beyond the Contractor's control, and as approved by the Engineer, then the time of completion may be extended as mutually agreed upon by the City and the Contractor.

4. If necessary, the Contractor shall agree to work Saturdays, Sundays, holidays, or longer than the normal working day in order to meet the project completion date.

F. Approval of Work

1. All work to be performed and all material to be furnished by the Contractor shall be subject to inspection by the Engineer or Utility Inspector and shall be performed and furnished to his/her satisfaction.

2. No payment made to the Contractor for a portion of the project completed or the partial or entire use of the work by the City shall constitute acceptance of any work which has not been performed in accordance with the Specifications.

3. Neither acceptance of the work by the City nor final payment shall relieve the Contractor of the responsibility for faulty material or workmanship that he has furnished, and he shall remedy any defects due thereto without expense to the City and pay for any damage to other work resulting there from which shall appear within one year from the date of the City's acceptance.

G. Sufficiency of Specifications or Plans

1. Information relative to foreign substructures is shown on plans or attached reference drawings, but the City shall not be liable or responsible for the completeness or correctness of the information.

2. The quantities of materials shown in the Notice Inviting Formal Bids to be furnished by the Contractor are for estimating use by the City. Actual quantities have not been determined by the City. Quantities are based on historic figures and anticipated work for the duration of the contract.

H. Permit

1. All rights-of-way and easements necessary for installations on private property, properties of other governmental agencies, or railroad crossings shall be secured by the City.

2. The costs incurred by working on railroad rights of way such as inspectors, safety flagmen, and rail supports, if necessary, shall be paid for by the City.

I. Payment

1. Payments shall be made in accordance with Article 9 of the General Conditions.

J. Schedule

1. The City Inspectors will schedule weekly pre-construction meetings. The Contractor, Subcontractors and Superintendent will attend the meeting.

2. The Contractor shall provide a detailed construction schedule at the pre-construction meeting and propose weekly meeting dates to review construction with the City Inspectors.

3. The Contractor shall provide traffic control plans covering each typical situation at the pre-construction meeting. Those plans must be approved by the Transportation Division before proceeding with construction.

SECTION 2 - SAFETY, SITE AND TRAFFIC CONTROL

1. This part of the specification covers the general safety and traffic control requirements.

B. Safety

1. All work shall be conducted in a safe manner and in strict accordance with the rules of the State Division of Industrial Safety (Cal. OSHA). The Contractor shall take all reasonable precautions necessary to protect from personal injury all workers and other persons who may be in or about the construction area and to prevent damage to the property of the City or others. Workers in the public right-of-way shall wear orange or lime-green safety vests and hard hats. All excavations which are five feet (5) and deeper shall have proper shoring.

2. At least five (5) days prior to any excavation, Contractor shall submit for acceptance to the Engineer or his designee a detailed plan showing the design of shoring, bracing, sloping, or other provisions to be made for worker protection from the hazard of caving ground during the excavation of any trench or trenches. Such plan shall be prepared by a registered civil or structural engineer if required by California Labor Code Section 6705.

Said plan shall be accepted by the Engineer or his designee prior to any excavation.

3. Nothing herein shall be deemed to allow the use of a shoring, sloping or protective system less effective than that required by the Construction Safety Orders of the Cal.

OSHA.

4. If, in the opinion of the Engineer or Utility Inspector, some portion of the work is being done in an unsafe manner, he\she may order that portion of the Work stopped until proper methods have been adopted by the Contractor to make it safe.

5. The Contractor shall notify the City in writing of all accidents arising out of work done under these Specifications and shall submit to the Engineer a detailed report of each such accident.

6. The Contractor shall conduct his operations and schedule clean up so as to cause the least possible obstruction and inconvenience to traffic, pedestrians, cyclists, and adjacent property owners. All work areas shall be swept clean at the end of each day's work and at other times when directed by the Engineer or Utility Inspector. A mobile street sweeper shall be used wherever required, and dust shall be suppressed to the satisfaction of the Engineer.

7. The Contractor shall protect open excavations, trenches and such during construction with fences, covers and railing as required, together with signs, barricades with working flashers and other warning devices sufficient to maintain safe pedestrian, bicycle and vehicular traffic to the satisfaction of the Engineer at all times.

8. Damage done by the Contractor during the course of his work to adjacent City or private property shall be repaired in kind, or as the Engineer or Utility Inspector shall direct, at the contractor's expense. This includes the repair of traffic loop detectors, tape striping, signs, markings, sidewalks, curb, gutter, pavement, etc. (all surface improvements)

9. The Contractor shall remove all forms, debris, and undesirable material from the job site at the end of each work day. After each site has been completed, the Contractor shall restore planting areas and other areas abutting the work to the condition existing at the start of work. Unless otherwise authorized by the Engineer, all construction and restoration shall be completed within fifteen (15) workdays from finish of work at any specific location.

10. Contractor shall furnish and maintain barriers, lights, and signs needed to warn the public adequately of the construction and of any dangerous conditions to be encountered as a result of the construction. Contractor shall also provide a safe walkway around the site during the construction unless the requirement is specifically waived by the Engineer.

The Contractor shall provide one working flasher for each barricade and shall insure that each flasher is maintained in working condition while in use. The Contractor shall not remove the barricades in the street at any given location until the asphalt concrete repair has been completed and the hazard to bicyclists and motorists no longer exists. The cost of all labor, materials, tools and equipment used in providing a safe project shall be included in the bid items and no additional compensation will be allowed.

11. Surface restoration, including curb painting, pavement legends, detector loops, striping and signing and cleanup at each listed location shall be diligently pursued to completion and at no location shall the work be left partially completed for more than seven (7) working days.

12. The Contractor shall notify the abutting property owners at least 72 hours prior to commencing work at their specific locations. If the driveway to any garage or parking area is to be closed for construction work, this notice shall state the approximate time of closing and the approximate time it will be reopened. The Contractor shall post "No Parking" signs as required.

13. Stock piling of materials or parking of equipment during non-working hours will be allowed on City Public Right-of Way as specified in the "Storage of Materials" policy.

14. The Engineer or Utility Inspector shall have the right to limit the amount of trench which may be opened or partly opened at any time. No more than 300 feet of trench shall be left open at any one time under any circumstances.

15. All open trench and excavations must be backfilled, compacted, and paved with temporary A.C. or steel plated at the end of each work day. The Contractor shall place minimum of 12" wide cold cut back around the edges of steel plates (12:1 slope) to eliminate the vertical edges.

16. The Contractor will place cold cut back around the iron work sticking out of the surfaces, and edges of the trenches (when backfilled with concrete slurry) to avoid vertical edges.

17. Spillage resulting from hauling operations along or across any public traveled way shall be removed immediately by the Contractor at his expense.

C. Traffic Control

A traffic control plan that shows the proposed work and method of warning, directing, and guiding traffic must be approved by the Transportation Division prior to starting. The Contractor shall supply, place, and maintain all necessary traffic control devices in accordance with the Palo Alto "Traffic Control Manual" and the following:

1. At the time of the pre-construction meeting the Contractor shall submit detailed traffic control plans covering all typical situations to the City for approval prior to starting construction.

2. Traffic Control plans will include a schedule of construction showing each phase of work and the anticipated method of handling traffic for each phase.

3. In general, Contractor shall maintain all vehicular, pedestrian, and bike movements. No total closure of any street or alley will be permitted. Contractor shall submit traffic control plans to the City Transportation Division for approval five days prior to beginning work.

The plans will show various phases of work, including dimensions of streets, width of lanes, etc.

4. The Contractor shall maintain one lane of traffic in each direction at all times on all streets. The clear width of the lane shall be a minimum of 10 feet.

5. A minimum four feet (clear) sidewalk shall be maintained unless the work makes closure unavoidable, in which case the sidewalk may be closed while working. However, an alternate pedestrian facility will be provided for the duration of the closure. At intersections, work will be permitted at one corner at a time, so pedestrian movements can be maintained through the intersection.

6. Contractor shall maintain access to all driveways except when actually doing construction within the driveway boundaries, at which time partial access will be maintained unless alternate arrangements can be made with the property owners or tenants in advance.

7. All existing traffic stripping, legends, signs and traffic signal facilities including detector loops, during this work shall be replaced by the Contractor at his expense.

8. Each pedestrian crosswalk, when crossed by construction excavation, shall be provided with a safe pedestrian crossing platform with handrails.

9. Work shall not restrict visibility of any traffic control devices.

10. No closure of any lane will be permitted during 7 AM to 9 AM and 4 PM to 6 PM. In addition, work will not be allowed at or within 200' of intersections between 11:30 AM to

1:00 PM.

11. The work should be coordinated with the appropriate Transit District running the buses in the area.

12. Any work within 150' of any signalized intersection should be coordinated with Traffic Signal Shop - 415/496-6991.

13. City of Palo Alto Truck Routes shall be used. See the attached map for details.

14. City of Palo Alto Noise Ordinance shall be in effect.

The above requirements are minimum and do not limit the Contractor's responsibility of doing all that is practical and necessary to ensure the safety of workers, pedestrians, bicyclists and motorists.

D. Sanitation Facilities

Contractor shall maintain sanitation facilities on a weekly basis or more frequently if required. If there are any odor complaints, the Contractor shall clean and move sanitation facilities to another site.

E. Storage of Equipment and Materials

1. Policy for Storage of Equipment, Pipes, Structures and Granular Materials in the Public Right-of-way:

Any storage in the public right of way shall be performed in strict compliance with City of Palo Alto Public Works Policy for storage of equipment, pipes, structures and granular materials in the public right-of-way.

2. General Storage Requirements:

It is the Contractor's responsibility to locate a site for the storage of equipment, materials, and office facilities and to obtain and pay for all permits and fees necessary to make the site legal for storage.

The Contractor shall not store any equipment or material on property zoned for residential use.

This includes commercial and industrial lots adjacent to residential property.

Any commercial or industrial property being considered as a storage site will require a use permit.

The use permit may be obtained through the Planning Department. This permit will expire in forty-five days from the date of issuance and may be renewed (allow 3 weeks of lead time for the renewal process) if the Contractor has acted as a good neighbor. When applying for the use permit, the Contractor may obtain approval for more than one storage site.

Equipment and materials which are part of the Contract shall be protected and stored in accordance with the recommendations of the manufacturer. The Contractor shall assume the risk of loss or theft of or damage to all equipment and materials delivered to or accepted by him or her until such equipment and materials have been completely installed and accepted by the Engineer.

Storage in public right of way will not require a use permit, but will require the prior approval of the Engineer. Storage on public properties also does not require a use permit, but will require the prior approval of the Engineer, Zoning Administrator, Traffic Engineer, and the Fire Department.

F. Water Use (Use Reclaimed Water Whenever Possible)

Reclaimed water shall be used for backfill compaction, and cleaning and testing of manholes.

The Palo Alto Regional Water Quality Control Plant located at 2501 Embarcadero Way, Palo Alto, will permit and provide reclaimed water for a fee. This allows self-service pickup and use of reclaimed water on a first come-first served basis, up to the capacity of the reclamation plant of two (2) million gallon per Day (MGD). An overhead standpipe with a seven hundred (700) gallon per minute (gpm) fill rate is available for tank trucks at the plant with the exception of the first Saturday of each month. Reclaimed water hours are Sunday through Saturday, 5:00 a.m. to 8:00 p.m. The permit for the use of reclaimed water can be obtained from the Manager of the Regional Water Quality Control Plant. Phone (650) 329-2243.

The City of Mountain View operates a reclaimed water filling hydrant on Terminal Road, Mountain View. A key deposit is required. Contact Mountain View Meter shop at (650)903-6328.

Potable water for drinking, filling of water mains, etc. is available from hydrants in the vicinity of the work. Hydrant water shall be metered with a hydrant meter obtained by contacting the City of Palo Alto Utilities Business Office at (650) 329-2161 (Second Floor Civic Center, 250 Hamilton Avenue, Palo Alto). A meter deposit is required. Payment for potable water used will be deducted from the Contractor's deposit at the time the meter is returned.

All costs and expenses for any water used on the project shall be included in one or more of the Bid items and no extra compensation shall be paid to the Contractor for water.

G. Cleanup

The Contractor shall conduct his or her operations and schedule cleanup so as to cause the least possible obstruction and inconvenience to vehicle, bicycle, or pedestrian traffic and adjacent property owners.

All work areas shall be kept in a dust-free state. A mobile street sweeper shall be used daily to maintain a dust-free condition. At the end of each working day all work areas shall be swept clean by an Athey Mobile Street Sweeper Model AHL M9 or an approved equal, subject to the approval of the Public Works Chief Inspector.

All landscaped areas shall be left with a neatly graded surface, conforming to the adjacent existing ground.

Spilled fluids shall be cleaned up and properly disposed of immediately, using an appropriate absorbent material, by the Contractor at the Contractor's expense.

Spillage resulting from the Contractor's hauling operations along or across any public traveled way shall be removed immediately by the Contractor at the Contractor's expense. All hazardous materials shall be cleaned up per the Fire Department’s and Public Works Department’s policies.

SECTION 3 - TRENCH, MANHOLE, AND SPLICE BOXES

1. This part of the Specification covers the excavation and backfilling of the trench, installation of manholes and splice boxes.

B. Removal of Street Surfaces, Concrete, Sidewalks, Driveways, Curbs, and Gutters

1. The demolition, removal and disposal of all inert solids shall be recycled as per section 24 of the City Standard Drawings and Specification, Department of Public Works, 2018.

2. Removal of concrete sidewalks, driveways, curbs and gutters shall be to existing joints or to full depth sawed cuts. Areas in which saw-cutting is done, the slurry and water shall be vacuumed immediately to prevent entry into storm catch basins and tracking of residue. To prevent any entry of slurry, water etc. into catch basins, sand bags and fabric filters will be required.

3. Replace all surface improvements in kind or to City minimum street section as per City

Standard Drawing and Specifications, whichever is the more stringent requirement.

4. Where an existing gutter is to be removed and replaced, the Contractor shall remove in straight line sufficient abutting asphalt concrete to permit the placing of a form between the adjacent asphalt concrete surface and the new gutter to be poured. The Contractor shall plug the void caused by the removal of the form with compacted asphalt concrete.

C. Trench Excavation (Ref. Sec. 17 of City Standard Drawings and Specifications)

(Note: Contractor to contact USA one week prior to excavation)

1. The width of the trench or trenches shall be in accordance with the dimensions shown for the applicable layout drawings and the minimums on Standard Dwg. DT-SS-U-1003.

Note: T-trench is a requirement on all public streets.

2. Trenching shall include the removal of all materials or obstructions of any nature, including the entire sidewalk to the nearest score mark, where the trench is under a portion of the sidewalk, and the curb when the trench is under curb or gutter, besides the installation and removal of all sheeting and bracing and the control of water necessary to construct the work as shown.

3. Unless indicated otherwise in the drawings, excavation for pipe lines shall be by open cut. Crossing pipe lines shall be protected by using hand excavation. All exposed gas lines shall be inspected for wrapping damage by the City's Underground Inspector prior to backfill.

4. Removal and replacement of concrete and asphalt surface improvements shall include saw cutting on both sides of the trench unless at a "cold joint" or expansion joint.

Tunneling under sidewalk, curb and gutter is not permitted except as noted on the construction plans.

5. The trench shall be excavated true to the center line shown on the contract Drawings and to a depth which will permit the duct to be installed at the grade shown except where unforeseen underground obstacles are encountered.

6. Where the duct is to be located in a concrete or asphaltic-concrete paved street, lines shall be marked along each side of the trench center line for a distance which will extend 6 inches beyond the side of the trench and the pavement cut along these lines with a concrete saw to the full thickness of the concrete. The pavement shall then be broken and stripped from the trench along with the base or sub-base materials, hauled from the job site, and disposed of by the Contractor. Stompers will not be allowed. A ram hoe or other method approved by the Engineer will be used.

7. The Contractor shall be responsible for any damage done to existing subsurface facilities during the construction. The Contractor shall pothole as necessary to determine the exact locations of pipes in critical situations prior to or during construction. In the event of damage to any electric, water, gas, wastewater, or communication facilities, the Contractor shall notify the City immediately. Repairs on the water, gas, electric, communication, and service laterals will be made by the City's Utilities Department and the actual cost thereof subtracted from the Contractor's payment. Wrapping on any exposed iron gas lines shall be inspected by the City prior to backfill. Repairs of customer-owned sprinkler system shall be made by the Contractor. Any tree roots 3" or more in diameter that must be cut shall be inspected by a representative of the Public Works Department prior to cutting.

8. When it is necessary to remove a section of concrete curb or driveway that is not near an existing joint, the concrete shall be sawed prior to breaking and removed as approved by the Public Works Inspector. Where it is necessary to cross a sidewalk, the concrete shall be saw cut and removed to the nearest score mark.

9. When shoring is required at locations other than those specified in the bid items, the

Contractor shall, at no additional expense to the City, furnish, put in place, and maintain such sheeting and bracing as may be required to support the sides of all excavations (whether above or below pipe grade) and to prevent any movement which could in any way diminish the required trench section, or otherwise injure or delay the work.

10. The bottom of the trench at final grade shall be smooth, uniform, and free from loose rocks, stones, or other foreign matter. Nothing shall be left in the trench which might damage the conduits. A sand bedding for direct-buried conduit may be required if the Engineer determines that the bottom of the trench is rocky enough to damage the conduit.

11. If it is necessary to relocate or temporarily remove and replace other underground utilities, the Contractor shall first obtain permission from the utility concerned and comply with its requirements in performing the necessary work. Property owners shall be notified at least 24 hours before the planned disruption of any utility service. All costs incurred shall be paid by the Contractor. Any damage to underground facilities shall be repaired at the Contractor's expense and to the satisfaction of the owner of the facility.

12. At locations indicated in the plans, Contractor shall install required service conduit stub-outs (electric, telephone and Cable TV) from the service boxes to a point specified by the Engineer.

13. Unless otherwise specified in "Special Provisions" for a particular project, the City will arrange for compaction tests to verify compliance with Section 21 of the City Standard Drawings and Specifications. City shall pay for all initial tests, but the Contractor shall reimburse the City for the costs of retests required because of failure to pass the initial tests.

D. Clearance and Cover

1. In general, the trench shall be excavated to a depth that will provide a minimum of 30 inches cover over the top of conduits in streets, and 24 inches of cover in sidewalks and parkways. When less than 30 inches of cover is authorized because of special conditions, suitable protection shall be placed over the duct prior to backfilling. Such protection shall be in accordance with the Engineer's instructions.

2. A minimum of one linear foot vertical separation and 5 linear feet horizontal separation shall be maintained between electrical conduits or concrete encasement and gas, water and wastewater pipelines, unless prior approval is obtained from the Utilities Inspector.

The dimension shall mean from the outside of the conduit or concrete encasement to the outside of the pipeline.

E. Installation of Steel Casing

1. At railroad and major street crossings where open excavation cannot be made, a steel casing shall be installed by boring and jacking. The grade shall be as shown on the Plan and Profile Drawing and the casing shall be installed to permit the conduit to be spaced as shown. The size shall be as specified on the Plan and Profile Drawing.

2. Joints between sections of the casing shall be welded for the entire circumference of each joint. This weld shall be a minimum of two complete passes.

3. The Contractor shall furnish casing for locations shown on the Plan and Profile Drawing.

If, for convenience of construction, the Contractor should elect to install casings at locations other than those shown on the Plan and Profile Drawing, he may do so at his expense provided the Engineer approves.

F. Backfilling

1. A 2-inch sand bedding will be required whenever direct-buried conduits other than rigid steel are placed on top of a concrete duct beam or passed over a concrete manhole.

2. In improved areas, all excavated material shall be removed from site. Backfill shall be in accordance with Palo Alto Standard Drawings and Specifications - Section 17.

3. All shoring or bracing shall be removed from the trench before backfilling.

4. Throughout the duration of the job, the Contractor shall have a crew available to promptly backfill and repair paving at trench and manhole locations where settlement or cave-ins have occurred. The Contractor shall make periodic inspections of the trench at least once a week as well as immediately after rain, and repair any defect at once.

5. When backfilling around ducts in steel casing, the space between the steel casing and the conduit shall be completely filled with the same sand used in the ditch by pumping, in a manner to assure that no voids exist and that the conduit is not damaged.G.

Pavement, Sidewalk, and Curb Replacement

1. All construction will be in accordance with City of Palo Alto Standard Drawings and

Specifications, Department of Public Works, 2007.

2. All grass plots, shrubbery, trees and fences, which have been disturbed or damaged in the progress of the work shall be replaced or restored by the contractor within ten (10) calendar days after surface improvements have been completed. Traffic control signs shall be replaced before work area is approved for traffic.

3. The Contractor shall guarantee all replacement and restoration for one year, and any repairs during said year due to settlement of the ground or other cause due to the work on this project shall be made at the expense of the Contractor.

H. Construction of Manhole and Primary Splice Boxes

1. All precast vaults shall be manufactured and installed as per City of Palo Alto, Utilities Engineering Vault Specification.

2. The manhole shall unless otherwise approved by the Engineer, be installed in advance of the conduit laying and shall be in accordance with the applicable layout drawings. The location and elevations shall be as shown on the Plan and Profile Drawing.

3. The Contractor shall arrange with the vault manufacturer the schedule for delivery for all precast manholes supplied by the City of Palo Alto. The Contractor shall also notify the Engineer, providing sufficient time for an inspector to inspect the vaults, before shipment from point of manufacture. All vaults and primary splice boxes are to be waterproofed.

3. Materials to be furnished by the Manufacturer are indicated in the Vault Specification.

4. After installation of the manhole, the area shall be backfilled according to the latest CPAU standards.

I. Waterproof Manhole

Any water seepage found after the vault is constructed shall be stopped with "Water Plug" or similar substance which shall be furnished by the Contractor and approved by the Engineer.

J. Installation of Splice Boxes

Unless otherwise specified, secondary, communication, and street-light splice boxes shall be installed in accordance with City of Palo Alto Standard Drawing No. DT-SS-U-1002. All boxes to be installed so top of boxes are at grade with the surface improvements.

K. Grading of Manholes and Splice Boxes

Splice boxes or manholes located in sidewalk areas or adjacent to sidewalk areas shall be graded to the existing or future sidewalk. If located in the parkway between the sidewalk and curb, splice boxes and manholes shall be graded in accordance with the Engineer's or Utility Inspector’s instructions. If located in areas with no sidewalks or curbs, splice boxes or manholes shall be graded in accordance with the Engineer's or Utility Inspector’s instructions.

SECTION 4 - CONDUIT INSTALLATION

1. This part of the Specification covers the handling, storing and installation of the conduit.

B. General

1. The Contractor shall furnish all materials necessary (unless otherwise noted) to complete the duct system.

2. The conduit and fittings shall be unloaded, handled, stockpiled, and installed in a manner that will protect the conduit and fittings against damage.

C. Materials

1. All plastic conduits and fittings shall be polyvinyl chloride (PVC) conduit and fittings manufactured in accordance with the following Specification (latest revision):

Type DB - NEMA TC-6 & TC-8 and ASTM F-512

Schedule 40 PVC - U.L. Standard 651 and NEMA TC-2

2. All steel conduits shall be hot-dipped rigid galvanized steel conduit.

D. Installation

1. Ducts and conduit shall be sized and located as required by the applicable drawings.

2. Extreme care shall be exercised to ensure that concrete and other foreign matter do not enter the ducts or conduit while they are being laid or concreted, or at any time thereafter.

All burrs or rough edges in conduit or duct shall be made smooth. All ducts and conduit shall be proved free of obstructions, dirt, rocks, etc., by means of a mandrel. The mandrel diameter shall be not more than 1/4-inch smaller than the duct or conduit diameter, and constructed in accordance with Standard Dwg. DT-SS-U-1025.

3. Rigid steel conduit shall be installed with threaded couplings and joints made up tight.

Where the ends are not threaded, a galvanized steel split coupling with galvanized steel bolts may be used. Conduit shall not be cut with a torch, welded, or brazed. Jointing compound shall be used on all threaded connections.

4. Plastic conduit shall be installed with solvent-welded couplings and joints made up tight.

5. Riser conduit shall be installed in accordance with Standard Dwg. No. DT-SS-U-1001A, except as noted on the construction plans.

6. Duct for concrete encasement shall be installed in accordance with Standard Dwg. No.

DT-SS-U-1003.

7. Conduit for direct burial shall be installed in accordance with Standard Dwg. No. DT-SS- U-1003.

8. Bends in duct or conduit shall be made in the form of long-radius sweeps, having a minimum radius of 10 feet wherever practical. When short-radius bends are required, the bending radius shall be specified on the layout drawings. In no case shall the bend radius be less than 36 inches for primary duct or 24 inches for secondary. Rigid steel bends shall be used for direct-buried conduit if the radius is 5 feet or less and the run is over 50 feet.

9. All bends and sweeps (90 degrees) shall be encased in concrete (minimum 3") along the inside radius.

10. All ducts and conduits other than rigid steel shall be terminated with appropriate bushings or other fittings as specified.

11. A 3/8" polypropolene pull line with a minimum 150 pound breaking strength shall be installed in each conduit or duct. Metallic pull wires or nylon are not acceptable.

12. Clearances between conduits and other substructures shall be at least those specified in California P.U.C. General Order 128 - (Rules for Underground Construction). Gas lines require a minimum separation of 12 inches.

13. Joints in multiple-conduit duct beams shall be staggered between vertical layers to produce at least a 2-foot horizontal separation.

E. Concrete Encasement

1. Concrete to be used for duct encasement shall be colored red by the addition of Miller's Red Oxide pigment to the concrete mix. Color will be to the satisfaction of the Utilities Underground Inspector.

2. Cement shall be clean, fresh, Class B Portland Cement.

3. Cement shall be a minimum of 3 sacks per cubic yard of concrete, unless otherwise specified.

4. Strength of concrete in place shall be a minimum of 2,500 pounds per square inch at twenty-eight days.

5. Concrete shall not be poured directly on the conduit. The concrete spout should be directed at a baffle or the side wall of the trench and the concrete allowed to flow down the side and around the conduit.

6. Concrete shall be allowed to cure minimum three (3) hours before any backfilling begins.

F. Spacers

1. Approved conduit spacers shall be used at a maximum 7-foot spacing for multiple-conduit duct beams where spacers are required.

2. Spacers shall not be placed where conduit couplings or belled joints will rest upon them.

3. Plastic conduits shall not be secured to spacers by wire or metal strap or any other method that provides a full conductive loop around the conduits.

SECTION - 5 DIRECTIONAL BORING

1. This part of the Specification covers the construction procedures, and methods and requirements to be used for installing Schedule 40 PVC or Schedule 40 PE conduit (street light, secondary, etc.., 2" or larger) using directional boring machine.

B. General

1. EXPERIENCE

The Contractor must demonstrate experience and expertise in trenchless excavation methods by providing a list of four references for whom similar work has been performed.

These references should include a name and telephone number of persons that can be contacted to verify experience. The Contractor or Subcontractor should have experience with directional boring; traffic control; installation of streetlight and secondary service boxes (N-9 and PG 1730 boxes); compaction testing; restoration of streets; replacement of concrete sidewalks, curbs and gutters.

2. SUBMITTAL

The Contractor must submit details of the equipment to be used and a written procedure with working drawings describing in detail the proposed boring method and the entire operation to be used. This shall include, but shall not be limited to, working and receiving shafts; dewatering; method of removing and disposing spoils material and installation of conduit; size, capacity and arrangement of equipment; shaft base material; type of cutter head; and method of monitoring and controlling line and grade.

C. Materials

1. All plastic conduits and fittings shall be polyvinyl chloride (PVC) or High Density, Extra High Molecular Weight PE 3408 Polyethylene conduit and fittings manufactured in accordance with the following Specification (latest revision):

Schedule 40 PVC- U.L. Standard 651 and NEMA TC-2 Schedule 40 PE NEMA TC-7

D. Directional Boring System

1. The system must be electronically trackable and steerable to avoid underground obstacles and existing utilities.

2. The system must permit the electronic monitoring of the tunnel depth and location to a window of +/- 2 inches. The system must be detectable to a depth of 5 feet or more.

3. The system may utilize a mixture of bentonite clay and water emitted through small diameter jets to work its way through the soil. The liquid clay is to remain in the tunnel to increase the stability of the tunnel and provide a lubricant to reduce frictional drag when the conduit is installed.

4. The spoils will be recovered by use of a vacuum system mounted on a vehicle for removal of spoil to an approved spoil site. The spoils are not to be discharged into any sewers or storm drain. The Contractor will be responsible for disposal of the spoils.

5. The equipment must be capable of boring in single bores, and boring pits will not be permitted to be any closer than shown on the drawings.

6. The cutting of the paved surface and subsequent excavation shall be in the form of access pits as required.

7. Each bore must be completed in one working day to ensure stability of the clay.

E. Installation of Conduit

1. Conduit shall be sized and located as required by the applicable drawings.

2. Extreme care shall be exercised to ensure that concrete and other foreign matter do not enter the conduit while they are being laid or concreted, or at any time thereafter. All burrs or rough edges in conduit shall be made smooth.

3. Plastic conduit shall be installed with solvent-welded couplings and joints made up tight.

4. Conduit for direct burial shall be installed in accordance with Standard Dwg. DT-SS-U-

1003, except as noted on the construction plans.

5. The minimum bend radius for 2" secondary conduit shall be 18" for runs less than 100' and 24" for runs over 100'. For 3" secondary conduit the minimum radius bend is 24" for runs less than 100' and 36" for runs over 100'. No conduit bend shall exceed 90 degrees.

A bend of no more than 270 degrees shall be permitted between pull boxes.

6. All conduits other than rigid steel shall be terminated with appropriate bushings or other fittings as specified.

7. The conduit shall be kept in compression while being installed in the bore to prevent joint separation.

8. Voids or air pockets in the soil shall be minimal with no surface subsidence.

9. All conduits shall be proven free and clear of dirt, rock, concrete, etc. by means of an approved mandrel. The mandrel test shall be witnessed by the City's Chief Electrical Underground Inspector or his designee.

10. A 3/8" polypropolene pull line with a minimum 150-pound breaking strength shall be installed in each conduit or duct. Metallic pull wires or nylon are not acceptable.

11. Minimum cover for direct buried conduits shall be 24 inches. Conduits shall have 30-inch cover under streets. Direct buried conduits under sidewalk areas may, at the Utilities discretion, be built with only 18 inches of cover.

SECTION 6 - 2026 - 2029 ON-CALL FIBER UTILITY TRENCH & SUBSTRUCTURE INSTALLATION

CONTRACT

A. General

1. The work includes On-Call Fiber Utility Trench & Substructure Installation for the fiber section of the Utilities Department of the City of Palo Alto beginning in the 2026 budget year and ending during the 2029 budget year.

2. The Contractor shall furnish all labor, tools, equipment, materials, supplies, manufactured articles, transportation, and services required for trenching, boring, excavation, installation of conduits and substructures, backfill, paving, and other surface restoration required for new electric services, system modifications, and other services as authorized by the Project Manager, or his/her designee,

3. Individual jobs will be given to the Contractor to dig trenches and/or bore, and install conduits and boxes mainly for electric utility customer services, small extensions, replacements to existing underground electric system and to install communications, streetlight, traffic signal, and fiber optic conduits and foundations.

4. Contractor shall be provided with a written description and/or job sketch of the work desired.

5. Contractor shall provide a written estimate for each job. The written estimate shall list the description of work and price by bid item number. Written estimate shall be approved in writing by the City project engineer prior to commencement of construction.

6. Any additions, deletions, or change in work covered by the Contract shall be authorized by a change order to the Contract. Additions shall be authorized in writing before work is done. Markup of extra work is covered under section 7 of the construction contract (bid package).

7. All materials shall be at cost plus markup covered under section 7 of the construction contract (bid package). Materials include, but are not limited to, asphaltic concrete, hot-mix asphalt, concrete, sand, drain rock, and class 2 aggregate base.

8. The Contractor shall meet with the City project engineer and/or the City Utility

Underground Inspector prior to commencing any work for final instructions. All work performed shall be under the supervision of the City Utility Underground Inspector.

9. Daily reports and copies of necessary receipts shall be provided by the Contractor and submitted to the Utility construction supervisor at the end of each working day.

10. All site conditions shall be restored by Contractor to the satisfaction of the City.

11. City will pay for disposal fees at cost plus markup covered under section 7 of the construction contract (bid package).

12. At the end of each job, the Contractor shall provide a worksheet which depicts the estimated and actual costs per bid item. Contractor shall provide explanation for significant over/under – runs as determined by the City’s project manager.

B. Schedule

1. The Contractor shall respond to service requests within twenty-four (24) hours of initial contact.

2. Contractor shall keep a job log. Column Heading for this report shall be include SO#, JOB ADDRESS, WORK DESCRIPTION, ENGINEER, PLAN RECEIVED, ESTIMATE

SUBMITTED, ESTIMATE APPROVED, AND ESTIMATE AMOUNT.

2. In the event that City implements a 9/80 work schedule, the Contractor shall be required to observe the same work schedule.

3. Normal work hours are 7:30am to 4:00pm. Time starts once contractor reaches the City yard.

4. Contractor shall rent space or yard to store their equipment and materials.

C. Invoice

1. The Contractor shall submit invoices on a monthly basis.

2. Invoices shall be accompanied by a report which will provide daily actual costs per bid item per job. Column headings for this report shall include, at a minimum, the City’s SERVICE ORDER NUMBER, the ESTIMATE NUMBER, the WORK DATE, the BID ITEM

NUMBER, UNIT OF MEASURE (UOM), DESCRIPTION OF WORK, QUANTITY, BILL

PRICE, and TOTAL. For non-bid items, there shall be additional headings for VENDOR, AND MARKUP. This report shall be the responsibility of the Contractor.

3. Estimating time is not paid. If job gets cancelled, contractor shall be paid for their estimating time.

4. The Contractor shall provide explanations for cost over-runs and under-runs at the discretion of the City’s Project Manager.