Technical_Specifications_FC24FD02.pdf

PUBLIC WORKS DEPARTMENT

NAPA, CALIFORNIA

Technical Specifications

FOR

Napa Fire Station #2 Electrical Service Upgrade 1501 Park Ave, Napa, CA

City Project No. FC24FD02

For use in connection with the Standard Specifications of the State of California Department of Transportation, latest Edition and the Standard Plans of the State of California Department of Transportation, latest Edition (unless otherwise noted in these Technical Specifications), the City of Napa Standard Specifications and Standard Plans dated January 2022, including any supplemental updates thereto, and the Labor Surcharge and Equipment Rental Rates in effect on the date the work is accomplished.

Virtual Bid Opening:

Wednesday, October 23, 2024 3:00 p.m.

via OpenGov

Dated: October 2024

LOCATION MAP

City of Napa

City of Napa Public Works Contract Documents Form 4.1 (2023-12-22) Napa Fire Station #2 Electrical Service Upgrade TECHNICAL SPECIFICATIONS City Project No. FC24FD02 Page i

TABLE OF CONTENTS

TECHNICAL SPECIFICATIONS

Part 1 – General

1.01 Order of Work

1.02 Progress Schedule

Part 2 – Traffic Control

2.01 Temporary Traffic Control Devices

2.02 Construction Area Signs

2.03 Maintaining Traffic

Part 3 – Earthwork

3.01 Dust Control

3.02 Clearing, Grubbing, and Landscape Restoration

3.03 Earthwork

3.04 Finishing Work

Part 4 – Existing Facilities

4.01 General

4.02 Potholing

4.03 Concrete Removal

Part 5 – Subbases and Bases

5.01 Aggregate Base

Part 6 – Surfacing and Pavements

6.01 Hot Mix Asphalt (HMA)

Part 7 – Miscellaneous Construction

7.01 Miscellaneous Concrete Construction

Part 8 – Incidental Construction

8.01 Patch and Repair at Exterior Walls and Penetrations

8.02 Patch and Repair at Interior Electrical Panels

Part 9 –Electrical Systems

9.01 General

9.02 Basic Electrical Requirements

9.03 Basic Electrical Materials

9.04 Service and Distribution (Panel Boards)

9.05 Service and Distribution (Switch Boards)

9.06 Start up; Third Party Testing

Appendix A – City of Napa Holiday Calendar(s) Appendix B – City of Napa Temporary Traffic Control Guidelines

Napa Fire Station #2 Electrical Service Upgrade TECHNICAL SPECIFICATION City Project No. FC24FD02 Page 2

TECHNICAL SPECIFICATIONS

Part 1 – General

1.01 Order of Work

Contractor shall follow the sequence of activities as set forth herein.

(1) Permits, Fees, and City Business License. Contractor shall obtain and paid for all necessary permits required for the Work. The cost thereof will be included in the Contract price paid for Control of Work, and no additional compensation will be allowed therefor.

(2) Notice of Excavation. Contractor shall comply with all applicable requirements in

Government Code §§ 4216 et seq., which are incorporated by reference herein.

(3) Project Notification. Contractor shall notify residents and/or property owners of the upcoming Work, in accordance with the requirements in the section titled “Construction Area Signs” of the Specifications.

(4) Traffic and Pedestrian Control Plan. Contractor shall implement approved traffic control plan in accordance with the requirements in the section titled “Traffic Control” of the Specifications. The cost thereof will be included in the Contract prices paid for Traffic Control, and no additional compensation will be allowed therefor.

(5) Potholing. Contractor shall know and comply with the requirements of the sections titled, “Notice of Excavation” and “Potholing,” of the Contract Documents. While a representative sample of the utilities crossing the project have been potholed and may be shown on the plans, Contractor shall pothole five days prior to beginning any excavation all buried utilities and other man-made objects at new concrete and street slope modification locations, check for conflicts, and provide the pothole data and written notice of any suspected conflicts between existing and proposed facilities prior to beginning any excavation. Said pothole data and written notice shall be provided to the Engineer not less than 14 working days prior to beginning any such excavation. For longer facilities such as buried pipelines, Contractor shall pothole at several locations, adequate in the opinion of the Engineer, to determine or verify the type, profile, size, and material of the facility. The cost thereof will be included in the Contract prices paid for Potholing, and no additional compensation will be allowed therefor.

(6) Remaining Work. Contractor shall perform remaining Work in accordance with the Project

Plans, Special Provisions, and these Technical Specifications. Nonconflicting work in subsequent stages may proceed concurrently with the work in preceding stages, provided satisfactory progress is maintained in the preceding stages of construction.

1.02 Progress Schedule

A progress schedule will be required for this Contract and must conform to the requirements of Section 5.2, “Schedule Requirements,” of the General Conditions and these Technical Specifications.

The Contractor must submit a copy of the initial schedule before or at the Preconstruction Conference. A Notice to Proceed may be issued, but work will not be allowed to commence until the City has reviewed and approved the schedule. The Contractor must provide scheduled updates as requested by the Engineer.

City Project No. FC24FD02 Page 3

MEASUREMENT AND PAYMENT – The Contract lump sum price for Progress Schedule includes full compensation for providing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in this section, complete in place, as described in the Contract, the Special Provisions, and these Technical Specifications, as directed by the Engineer, and no additional compensation will be allowed therefor.

Part 2 – Traffic Control

2.01 Temporary Traffic Control Devices

Flagging, signs, and all other traffic control devices furnished, installed, maintained, and removed when no longer required shall conform to the provisions in Section 12, "Temporary Traffic Control," of the Standard Specifications and these Technical Specifications.

MEASUREMENT AND PAYMENT – The Contract Lump Sum price for Traffic Control and Pedestrian Control Plan includes full compensation for providing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in this section, including providing self-certification for crashworthiness of Category 1 traffic control devices, complete in place, as described in the Contract, the Special Provisions, and these Technical Specifications, as directed by the Engineer, and no additional compensation will be allowed therefor.

2.02 Construction Area Signs

Construction area signs shall be furnished, installed, maintained, and removed when no longer required in conformance with the provisions in the section titled, "Temporary Traffic Control," of these Specifications.

Contractor shall know and comply with the requirements of the section titled, "Prequalified and Tested Signing and Delineation Materials," of these Technical Specifications. Type II retroreflective sheeting shall not be used on construction area sign panels. Sign substrates for stationary mounted construction area signs may be fabricated from fiberglass reinforced plastic as specified under "Prequalified and Tested Signing and Delineation Materials" of these Technical Specifications.

Contractor shall notify residents and property owners in writing 48 hours (excluding weekends and holidays) prior to performing any work at the site. The notification form to be provided to residents and property owners shall be submitted to the City for review and approval. Contractor shall know and comply with the requirements of the section titled “Submittals,” of these Technical Specifications.

Street parking may be restricted as necessary to facilitate construction activity. “No Parking” signs, as required, shall be placed by Contractor 48 hours in advance of the parking restriction. “No Parking” signs shall have the following information:

“Tow Away, No Parking

Date of Restriction

Time of Restriction

Construction Zone

“Vehicles in Violation Subject to Tow at Owner’s Expense”

“Napa Police Department: 707-257-9223"

CVC 22658 (1); CVC 22651 (L)

City Project No. FC24FD02 Page 4

“No Parking” signs shall have red letters on a white background. “No Parking” signs shall be spaced no more than 30 feet apart. The City can provide “No Parking” signs at the Contractor’s request.

Contractor will not be allowed to restrict parking in all areas of the project for the entire duration of the project to facilitate their work. The placement of “No Parking” signs shall be conducted in a manner that reasonably reflects the location of the work at any given time during the project.

The cost of furnishing, installing, maintaining, and removing signs, sign covers, lights, flares, temporary railing, barricades, flagmen, guards, and all construction area traffic control devises will be borne by the Contractor.

MEASUREMENT AND PAYMENT – The Contract Lump Sum price for Traffic Control and Pedestrian Control Plan includes full compensation for providing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in this section, complete in place, as described in the Contract, the Special Provisions, and these Technical Specifications, as directed by the Engineer, and no additional compensation will be allowed therefor.

2.03 Maintaining Traffic

Contractor shall know and comply with the requirements of Sections 7-1.03, "Public Convenience," and 12-4, “Maintaining Traffic,” of the Standard Specifications and these Specifications. Nothing in these Specifications will be construed as relieving the Contractor from the responsibilities specified in the Standard Specifications.

Prior to saw cutting of existing curb, gutter, sidewalk, driveway, and asphalt concrete for removal and up to the time the new improvements are opened to the public, Contractor shall erect and maintain necessary signs and barricades as required in these Specifications.

No work that would require a lane closure will be performed unless otherwise authorized by the Engineer. Lane closures shall conform to the provisions in the section "Traffic Control System for Lane Closure" of these Specifications. The term closure, as used herein, is defined as the closure of a traffic lane or lanes, including ramp or connector lanes, within a single traffic control system.

Bicycle traffic shall be maintained per these Specifications.

No street closures will be allowed unless directed by the Engineer. If the Contractor desires a street closure, the Contractor shall submit a written request, accompanied with a traffic control plan, to the Engineer for review and approval. The request shall state the reason, locations, and times for the closure, and shall be submitted a minimum of five working days prior to the request.

No vehicular detours will be allowed.

No street closures will be allowed overnight.

Access for emergency vehicles shall be provided at all times. Any repairs due to damage caused by emergency vehicle usage during the periods of street closure shall be paid for as extra work.

Contractor shall furnish, install, maintain, and remove barricades, as required, and shall provide other facilities to safeguard adequately the general public, local pedestrian and vehicle traffic, and the work as may be deemed necessary by the Engineer during working and non-working hours.

The Contractor shall take all necessary precautions to minimize disruptions to the Fire Department throughout the duration of the project. At the end of each workday, steel plates shall be securely placed over any open trenches to ensure safe vehicular access. The Contractor shall schedule and phase the work to guarantee uninterrupted access to the Fire Department's parking lot. Driveways must always maintain at least a 10-foot-wide unobstructed passage.

Contractor shall file, with the Engineer and Police Department, the name and telephone number of company representative (provide minimum two contacts) to be notified after normal working hours and on weekends, in case of emergency. This information shall be provided at the preconstruction conference. If a preconstruction conference is not held, it shall be provided to the Engineer prior to the start of work.

City Project No. FC24FD02 Page 5

Contractor shall provide pedestrians with reasonably safe, convenient, and accessible paths that replicate as nearly as practical the most desirable characteristics of the existing sidewalks or footpaths. The Contractor shall submit a Pedestrian Control Plan (PCP) for the review and approval of the Engineer at the time of the submittal of the Traffic Control Plan. The PCP shall provide a safe path of travel for pedestrians within the construction site and shall provide access to the corner ramps during construction. The Contractor shall provide the appropriate safety barriers, including water barriers, required when directing pedestrians into the roadway. The PCP shall follow requirements set forth in the most recent CA MUTCD including the use of water barriers and other approved safety devices for the protection of pedestrians. Pedestrians shall not be detoured more than two (2) blocks or over weekends or holidays unless approved by the Engineer.

MEASUREMENT AND PAYMENT – The Contract Lump Sum price for Traffic Control and Pedestrian Control Plan includes full compensation for providing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in this section, including the placement of material on a 4:1 slope, regardless of the number of times it is required, and subsequent removing or reshaping of the material to the lines and grades shown on the plans, complete in place, as described in the Contract, the Special Provisions, and these Technical Specifications, as directed by the Engineer, and no additional compensation will be allowed therefor.

Part 3 – Earthwork

3.01 Dust Control

Contractor shall know and comply with the requirements of Section 10-5, “Dust Control,” Section 14-11, “Hazardous Waste and Contamination” and Section 18, “Dust Palliatives,” of the Standard Specifications and the section titled “Water Pollution Control,” of these Technical Specifications.

Contractor shall be familiar with and comply with all monitoring, reporting, notifications, and control requirements of agencies having jurisdiction over air quality.

Contractor shall prevent the formation of an airborne dust nuisance by watering work areas as required until the project is completed and accepted. The amount of water used shall not be excessive to cause soil carry-over or wash-off outside the boundaries of the working area. If soil wash-off occurs, the Contractor shall immediately notify the Engineer and identify the area where wash-off occurred. Contractor shall provide polyethylene sheeting to place underneath and over any stockpiled soil, unless otherwise directed by the Engineer. The stockpile shall be covered daily after completion of work. The sheeting shall be adequately weighted or secured to keep the sheeting in place during non-work periods.

MEASUREMENT AND PAYMENT – The Contract lump sum price for Water Pollution Control includes full compensation for providing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in this section, complete in place, as described in the Contract, the Special Provisions, and these Technical Specifications, as directed by the Engineer, and no additional compensation will be allowed therefor.

3.02 Clearing, Grubbing, and Landscape Restoration

Contractor shall know and comply with the requirements of Section 17-2, “Clearing and Grubbing,” of the Standard Specifications and the sections titled, “Preservation of Property”, “Irrigation”, and “Tree Removal”, of these Technical Specifications.

Clearing and grubbing includes the removal and disposal of all vegetation, objectionable material including vines, logs, upturned stumps, downed trees, concrete, masonry, loose rocks and debris, and other items within the construction areas in order to perform the work. Within the limits of clearing, the areas below the natural ground surface shall be grubbed to a depth necessary to remove all roots, buried logs and all other objectionable material. In areas where PCC will be placed, objectionable material shall be removed to firm undisturbed mineral soil only.

City Project No. FC24FD02 Page 6

Landscape restoration includes the removal, relocation, replacement, height adjustment, and disposal of landscaping and irrigation equipment within the construction areas, as shown on the plans and as directed by the Engineer. The Contractor shall salvage (reuse or return items to the property owner) existing landscaping materials, including turf, to the greatest extent possible.

Contractor to remove portions of irrigations line, remove sprinkler heads, cap ends of irrigation lines, and relocate valves as shown on the plans.

All existing vegetation and private property that have not been identified for removal or relocation, shall be protected from injury or damage. In the event that existing vegetation and/or facilities to remain are damaged by the Contractor’s activities, the Contractor shall replace the damaged items in kind and to the satisfaction of the property owner and the Engineer. Such items may include, but are not limited to, the relocation and reconnection of landscape electrical and/or irrigation to function as did prior to the Contractor’s activities.

Contractor to remove portions of irrigations line, remove sprinkler heads, cap ends of irrigation lines, and relocate valves as shown on the plans.

Construction and/or demolition debris, including but not limited to vegetative matter, trees, roots, chips, etc., shall be hauled off site and disposed of by the Contractor at the end of each workday.

Nothing herein will be construed as relieving the Contractor of the Contractor’s responsibility for final cleanup. Contractor shall know and comply with the requirements of the section titled, “Finishing Work,” of these Technical Specifications.

MEASUREMENT AND PAYMENT – The Contract Lump Sum price for Clearing, Grubbing, and Landscape Restoration includes full compensation for providing all labor, materials, tools, equipment, and incidentals and for doing all the as described in the Contract, the Special Provisions, and these Technical Specifications, as directed by the Engineer, and no additional compensation will be allowed therefor.

3.03 Earthwork

Contractor shall know and comply with the requirements of Section 19, "Earthwork," of the Standard Specifications and the section titled “Existing Facilities” and “Finishing Work,” of these Technical Specifications.

Upon the Engineer’s approval of the subgrade, placement of the aggregate base material may proceed.

Contractor shall know and comply with the requirements of the section titled, “Disposal of Material,” of these Technical Specifications. All surplus excavated material will become the Contractor’s property and shall be disposed of accordingly.

MEASUREMENT AND PAYMENT – The Contract lump sum price for Control of Work includes full compensation for providing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in this section, complete in place, as described in the Contract, the Special Provisions, and these Technical Specifications, as directed by the Engineer, and no additional compensation will be allowed therefor.

3.04 Finishing Work

Finishing Work includes performing finishing activities after completing all other construction activities.

Topsoil for filling and conform grading between the curb and sidewalk and filling, conform grading, and shaping behind the curb, sidewalk, and within the project area shall consist of 50% loam and 50% nitrogen fortified redwood sawdust or approved equal and be free from deleterious substances such as litter, refuse, toxic waste, stones larger than 1 inch in size, coarse sand, heavy or stiff clay, brush, sticks, grasses, roots, noxious weed seed, weeds, and other substances detrimental to plant, animal, and human health. Graded surfaces shall not contain slopes greater than 2:1.

City Project No. FC24FD02 Page 7

The Contractor shall test all repaired and/or replaced irrigation systems. Once complete, the Contractor shall demonstrate to the Engineer that the repaired and/or replaced facilities operate properly.

Clean out sewers, culverts, and other drainage facilities and appurtenant structures constructed under the Contract.

Do not stockpile material on finished pavement or allow material to drift across pavement. Clean finished pavement of dirt and foreign material. Cleanup of the roadway of all construction debris at the end of each workday shall be included as part of this section.

MEASUREMENT AND PAYMENT – The Contract lump sum price for Clearing, Grubbing, and Landscape Restoration includes full compensation for providing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in this section, complete in place, as described in the Contract, the Special Provisions, and these Technical Specifications, as directed by the Engineer, and no additional compensation will be allowed therefor.

Part 4 – Existing Facilities

4.01 General

Contractor shall know and comply with the requirements of Project disposal.

Performing work on existing facilities includes abandoning, adjusting, modifying, obliterating, reconstructing, relaying, relocating, remodeling, removing, repairing, resetting, or salvaging a facility.

Do not perform work on existing facility until the facility is no longer needed.

Reconstructed facilities must comply with the design of and be equal to the best parts of the existing facilities.

Reconstruction work must comply with the specifications for new work of similar materials.

If during work activities damage occurs to a facility or a portion of the facility to remain in place, or to materials to be salvaged or incorporated into the work, the Contractor shall repair or replace it.

The repair or replacement must be equal or better in quality than the original portion.

4.02 Potholing

Contractor shall know and comply with the requirements of the current edition of the USA North’s California Excavation Manual, and the sections titled, “Property and Facility Preservation” and “Order of Work,” of these Technical Specifications.

At the Contractor’s option, potholing shall be either performed by hand digging or by vacuum excavation.

Contractor shall notify the appropriate regional notification center for operators of subsurface installations at least two (2) working days, but not more than fourteen (14) calendar days, prior to commencing excavation or other work close to any underground pipeline, conduit, duct, wire, or other structure. The regional notification centers include, but are not limited to, the following:

Notification Center Telephone Number

Underground Service Alert-Northern California

(USA)

1-800-642-2444

1-800-227-2600

Potholes shall be sawcut round with a maximum size of twelve (12) inches in diameter unless otherwise directed by the Engineer. Facilities exposed during potholing shall be protected throughout the project.

City Project No. FC24FD02 Page 8

Potholes shall be restored by the end of the workday after the utility has been located, or as otherwise directed by the Engineer. Potholes shall be backfilled with a slurry cement backfill conforming to Sections 19-3.02E, “Slurry Cement Backfill,” and 19-3.03F, “Culvert Bedding” of the Standard Specifications, unless otherwise directed by the Engineer. All potholes located in asphalt concrete shall have the edges tack oiled and permanently paved to match the existing asphalt concrete thickness (minimum 4”). The Contractor shall know and comply with the requirements of the sections titled, “Hot Mix Asphalt (HMA),” of these Technical Specifications. The repair of potholes in concrete driveways and sidewalks requires the removal and replacement of the concrete to score lines unless otherwise authorized by the Engineer. The Contractor shall know and comply with the requirements of the section titled, “Miscellaneous Concrete Construction,” of these Technical Specifications.

Contractor shall pothole five days prior to beginning any excavation all buried utilities and other man-made objects throughout the proposed work area of work, check for conflicts, and provide all pothole data and written notice of any suspected conflicts between existing and proposed facilities.

MEASUREMENT AND PAYMENT – The Contract Lump Sum price for Potholing and Utility Location includes full compensation for providing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in this section, complete in place, as described in the Contract, the Special Provisions, and these Technical Specifications, as directed by the Engineer, and no additional compensation will be allowed therefor.

4.03 Concrete Removal

Work associated with concrete removal includes the removal and disposal of all concrete including curb, gutter, driveway, sidewalk, cross gutter, asphalt concrete, and other PCC to the subgrade depth as shown in the plans and as directed by the Engineer. It is the Contractor’s responsibility to take appropriate care to locate/pothole existing utilities. Utilities as represented on the plans are approximate in horizontal location and unknown in vertical depth. The Contractor shall know and comply with the requirements of the section titled, “Potholing,” of these Technical Specifications.

To protect all parties’ interests, the Contractor shall test all irrigation systems, in the presence of the property owner and/or the Engineer, prior to beginning demolition. The Contractor is responsible to maintain the integrity of private property. The Contractor will be responsible to replace any damaged landscaping or irrigation on private property and within the public right-of-way.

Utility identification symbols, typically “S” for sanitary sewer and/or “W” for water, may exist on some curbs. The Contractor shall reference mark these symbols prior to removal of the curb and gutter and stamp a new symbol at the location of the original symbol or the where the utility line has been identified. A new symbol shall be stamped where the underlying utilities are identified, 1/8” minimum depth, into the curing PCC, of a plain font that is easily read with a letter height of approximately 3” placed on top and face of curb.

Where curb, gutter, curb ramp, and cross gutter are to be removed, the adjacent asphalt concrete shall be sawcut to a neat line and the entire section width shall also be removed to the subgrade depth as shown on the plans. If no dimensions are shown on the plans or the limits are not marked out by the Engineer, the adjacent asphalt concrete shall be sawcut to a neat line at a minimum of two (2) feet from the existing gutter lip of either the curb and gutter or the cross gutter, and/or the edge of existing asphalt pavement, and the entire section removed to the subgrade depth as shown on the plans. The street section being removed for curb and gutter replacement shall be replaced with a new six (6”) hot mix asphalt concrete section. HMA shall be placed and paid for in accordance with the sections titled, “Hot Mix Asphalt (HMA),” of these Technical Specifications.

Any portion of existing improvements that is damaged by the Contractor’s activities beyond the limits of removal, as shown on the plans, as marked by the Engineer, or as specified in the Standard Specifications and/or Special Provisions shall be replaced by the Contractor at no cost to the City.

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Existing curb, gutter, driveway, sidewalk, curb ramp, cross gutter, and asphalt pavement shall be cut to a minimum depth of 0.17 foot with an abrasive type saw at the first score line at or beyond the conformation line and the entire section shall be removed. If there are no score lines or as directed by the Engineer, the existing concrete improvement shall be sawcut at the conformation line. The Contractor shall drill holes in the existing concrete improvements for rebar dowels as shown on the plans. Said holes shall be perpendicular to the sawcut line, centered in the sidewalk, and sized to accommodate dowels. The new concrete improvements shall join and be flush with the existing concrete at the sawcut line with rebar dowels and expansion joint filler per City Standard S-4B.

MEASUREMENT AND PAYMENT – The Contract Lump Sum price for Demolition includes full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in the removal and disposal of PCC and AC flatwork, including driveways, driveway approaches, sidewalks, and cross gutters, complete in place, including sawcutting, the removal of materials to subgrade and disposal thereof, and the preservation, replacement or removal of homeowner improvements within the public right-of-way (ie. Plantings and irrigation), as described in the Contract, the Special Provisions, and these Technical Specifications, as directed by the Engineer, and no additional compensation will be allowed therefor.

Part 5 – Subbases and Bases

5.01 Aggregate Base

Aggregate base shall be Class 2, three quarter inch (¾“) maximum grading and shall conform to the provisions in Section 26, "Aggregate Bases," and the section titled “Miscellaneous Concrete” Standard Specifications and these Technical Specifications. Recycled material, if used, shall also be Class 2, three quarter inch (¾ “) maximum grading and shall include a minimum of 30% virgin aggregates.

Contractor shall place aggregate base to the dimensions shown on the plans. All subgrade and aggregate base placed shall be compacted to a minimum relative compaction of ninety-five percent (95%).

The Engineer will provide ongoing laboratory testing on aggregate base samples at the plant of origin and in the field. If the material is found to be out of compliance with the Standard Specifications and these Technical Specifications, the engineer will immediately provide notification and may stop the work in accordance with Section 8-1.06, “Suspensions” of the Standard Specifications and these Technical Specifications. Contractor shall provide the Engineer with five working days’ notice, in writing, of any production of aggregate base material used on this project including the specific dates of aggregate base production.

If accepted subgrade becomes saturated and/or disturbed or more than five working days pass between acceptance of the material and placement of the upper layer, the subgrade shall again be proof-rolled, and retesting will be required. The cost of the retesting will be borne by the Contractor.

MEASUREMENT AND PAYMENT – The Contract unit price paid per linear foot of AC Patch and Repair includes full compensation for providing all labor, materials, tools, equipment and incidentals and for doing all the work involved in this section, complete in place as described in the Contract, the Special Provisions, and these Technical Specifications, as directed by the Engineer, and no additional compensation will be allowed therefor.

The Contract unit price paid per linear foot of Trenching, Backfill, and Compaction includes full compensation for providing all labor, materials, tools, equipment and incidentals and for doing all the work involved in this section, complete in place, as described in the Contract, the Special

City Project No. FC24FD02 Page 10

Part 6 – Surfacing and Pavements

6.01 Hot Mix Asphalt (HMA)

The Contractor shall know and comply with the requirements of Section 39, “Hot Mix Asphalt,” Section 92, “Asphalts Binders,” and Section 94, “Asphaltic Emulsions,” of the 2010 Standard Specifications and these City Standard Specifications.

Amend Section 39-1.01 “General” of the Standard Specifications to add the following:

Produce and place 3/8-inch Type A HMA for leveling course, Grade PG 64-16 per Section 39- 2 “STANDARD Construction Process,” of the 2010 Standard Specifications.

Produce and place 3/4-inch Type A HMA for HMA plug, Grade PG 64-16 per Section 39-2 “STANDARD Construction Process,” of the 2010 Standard Specifications.

Amend Section 39-1.02B “Tack Coating” of the Standard Specifications to add the following:

Tack coat must be utilized and be emulsified asphalt Grade RS-1, RS-1h, SS-1, or SS-1h and must conform to Section 94 “Asphaltic Emulsions”, of the 2010 Standard Specifications.

Amend Section 39-1.02C “Asphalt Binder” of the Standard Specifications to add the following:

Asphalt binder to be mixed with aggregate shall be grade PG 64-16.

The Contractor must submit mix designs for all asphalt concrete to be used on the project.

Amend Section 39-1.02E “Aggregate” of the Standard Specifications to add the following quality characteristic to the “Aggregate Quality” table:

The Durability Index for all HMA aggregates must be a minimum of 35.

The aggregate must not be treated with lime, cement or other chemical material before the Durability Index test is performed.

Amend Section 39-1.03A “General” of Hot Mix Asphalt Mix Design Requirements of the Standard Specifications to add the following:

The HMA must be ½ inch Type “A” HMA

Amend Section 39-1.03C “Job Mix Formula Submittal” of the Standard Specifications to add the following:

The Contractor must submit mix designs for all asphalt concrete to be used on the project.

Each delivery ticket must include information on the material type, binder type, oil content, and the mix design number. Material delivered to the project without such annotations shall be subject to rejection. Only original delivery tickets (no photocopies) shall be delivered to the Engineer on a daily basis.

Amend Section 39-1.04F “Density Cores” of the Standard Specifications to delete the following:

To determine density for Standard and QC/QA construction process projects, take 4- or 6-inch diameter density cores at least once every 5 business days. Take 1 density core for every 250 tons of HMA from random locations the Engineer designates. Take density cores in the Engineer's presence and backfill and compact holes with authorized material. Before submitting a density core, mark it with the density core's location and place it in a protective container.

If a density core is damaged, replace it with a density core taken within 1 foot longitudinally from the original density core. Relocate any density core located within 1 foot of a rumble strip to 1 foot transversely away from the rumble strip.

Amend Section 39-1.04F “Density Cores” of the Standard Specifications to add the following:

City Project No. FC24FD02 Page 11

In-place density and relative compaction for the Standard Construction Process projects is determined by the nuclear density device per California Test 375.

Amend Section 39-1.07 “Production Start-Up Evaluation” of the Standard Specifications to delete the following:

Within the first 750 tons produced on the 1st day of HMA production, in the Engineer's presence and from the same production run, take samples of:

For Standard and QC/QA construction process projects, take 4- or 6-inch diameter density cores within the first 750 tons on the 1st day of HMA production. For each density core, the Department reports the bulk specific gravity determined under California Test 308, Method A, in addition to the percent of maximum theoretical density. You may test for in-place density at the density core locations and include them in your production tests for percent of maximum theoretical density.

Amend Section 39-1.07 “Production Start-Up Evaluation” of the Standard Specifications is add the following:

Within the first 500 tons produced on the 1st day of HMA production, in the Engineer's presence and from the same production run, take samples of:

In-place density and relative compaction for the Standard Construction Process projects is determined by the nuclear density device per California Test 375. Test density within the first 500 tons on the 1st day of HMA production.

Amend Section 39-1.09A “General” of Subgrade, Tack Coat, and Geosynthetic Pavement Interlayer of the Standard Specifications to add the following:

Surface Preparation

The work must consist of preparing the existing street surfaces prior to the commencement of paving. Such work shall include removing raised pavement markers, removing thermoplastic and painted traffic markings and legends, controlling nuisance water, sweeping, watering, and removing loose and broken asphalt concrete pavement and foreign material as specified in the Standard Specifications and these Technical Specifications, and as directed by the Engineer. The removal of existing markers, striping and pavement markings shall conform to the sections titled “Removal of Pavement Markers” and “Removal of Traffic Stripes and Pavement Markings” of these Technical Specifications.

Amend Section 39-1.11 “Transporting, Spreading, and Compacting” of the Standard Specifications to add the following:

The Contractor must have hand-compaction equipment immediately available for compacting all areas inaccessible to rollers. Hand-compaction must be performed concurrently with breakdown rolling. If for any reason hand-compaction falls behind breakdown rolling, further placement of HMA must be suspended until hand-compaction is caught up. Hand-compaction includes plate compactor, pneumatic tamper and hand tampers. Hand torches must be available for rework of areas which have cooled.

After compaction, the surface texture of all hand work areas must match the surface texture of the machine placed mat. Any course or segregated areas must be corrected immediately upon discovery. Failure to immediately address these areas will cause suspension of HMA placement until the areas are satisfactorily addressed, unless otherwise allowed by the Engineer.

Cold Joints

All cold joints, both longitudinal and transverse, must be heated with a torch immediately prior to paving. Cold joints include previously installed asphalt passes that are more than three hours old.

All cold joints must be tack coated.

Tolerances

City Project No. FC24FD02 Page 12

The average pavement thickness must be equal to the specified thickness for the project. For total pavement thicknesses of less than four inches, the minimum allowable thickness will be ¼ inch less than that specified. For total pavement thicknesses of four inches or more, the minimum allowable thickness will be ½ inch less than that specified.

You are responsible for verifying the anticipated tonnage for each street segment using the data from the JMFs for the mix to be used at least 10 days prior to paving. If the anticipated quantity varies more than +/-5% from that indicated in the bid schedule, you must notify the Engineer in writing of the discrepancy and provide computations regarding tonnage.

Daily Paving Completion

The Contractor must schedule paving activities such that each layer of HMA is placed across the entire excavated area at the end of each work shift.

Pavement Thickness and Temperatures

Pave HMA in maximum 0.25-foot thick compacted layers.

If the surface to be paved is both in sunlight and shade, pavement surface temperatures must be taken in the shade.

Spread HMA Type A and Type B at the atmospheric and surface temperatures shown in the following table:

Minimum Atmospheric and Surface Temperatures

Compacted layer thickness, feet

Atmospheric, °F Surface, °F

Unmodified asphalt binder

Modified asphalt bindera

Unmodified asphalt binder

Modified asphalt bindera

<0.15 55 50 60 55

0.15-0.25 45 45 50 50 aExcept asphalt rubber binder.

If the asphalt binder for HMA Type A and Type B is unmodified asphalt binder, complete:

1. First coverage of breakdown compaction before the surface temperature drops below 250 degrees F

2. Breakdown and intermediate compaction before the surface temperature drops below 200 degrees F

3. Finish compaction before the surface temperature drops below 150 degrees F

If the asphalt binder for HMA Type A and Type B is modified asphalt binder, complete:

1. First coverage of breakdown compaction before the surface temperature drops below 240 degrees F

2. Breakdown and intermediate compaction before the surface temperature drops below 180 degrees F

3. Finish compaction before the surface temperature drops below 140 degrees F

Amend Section 39-2.02B “Quality Control Testing” of the Standard Specifications is remove the following:

For any single quality characteristic except smoothness, if 2 consecutive quality control test results do not comply with the action limits or specifications:

1. Stop production.

2. Notify the Engineer.

3. Take corrective action.

City Project No. FC24FD02 Page 13

4. Demonstrate compliance with the specifications before resuming production placement.

Amend Section 39-2.03A “Testing” of the Standard Specifications to remove the following:

Remove “HMA Acceptance – Standard Construction Process” Table.

No single test result may represent more than 750 tons or 1 day's production, whichever is less.

For any single quality characteristic except smoothness, if 2 consecutive quality control test results do not comply with the action limits or specifications:

1. Stop production.

2. Take corrective action.

3. Take samples and split each sample into 4 parts in the Engineer’s presence. Test 1 part for compliance with the specifications and submit 3 parts to the Engineer. The Department tests 1 part for compliance with the specifications and reserves and stores 2 parts.

4. Demonstrate compliance with the specifications before resuming production placement and placement.

The Department tests the density core you take from each 250 tons of HMA production. The Department determines the percent of maximum theoretical density for each density core by determining the density core's density and dividing by the maximum theoretical density.

If the specified total paved thickness is at least 0.15 foot and any layer is less than 0.15 foot, the Department determines the percent of maximum theoretical density from density cores taken from the final layer measured the full depth of the total paved HMA thickness.

For percent of maximum theoretical density, the Engineer determines a deduction for each test result outside the specifications using the reduced payment factors shown in the following table:

Amend Section 39-2.03A “Testing” of the Standard Specifications to add the following:

The City will perform acceptance testing of the HMA based on the Acceptance Criteria as shown in the following Table 1.

Table 1 - HMA Acceptance - Standard Construction Process

Quality characteristic Test method HMA Type A Frequency Location of Sampling

Aggregate gradiationa California Test

JMF ±

tolerancec

1 per day At plant per CT

Sieve 3/4" 1/2" 3/8"

1/2" Xb

3/8" X

No. 4 X

No. 8 X X X

No.

200 X X X

Sand equivalent (min)d California Test

47 1 per day At plant per CT

City Project No. FC24FD02 Page 14

Quality characteristic Test method HMA Type A Frequency Location of Sampling

Asphalt binder content

California Test 379 or 382

JMF ± 0.45 1 per 500 TONS Loose mix behind paver per CT 125

HMA moisture content (%, max)

California Test 226 or 370

1.0 1 per 500 TONS Loose mix behind paver per CT 125

Percent of maximum theoretical density (%) e, f

California Test

91-97 1 per day (max th.

Density)

Loose mix behind the paver

In-Place Density and Relative Compaction

(Nuclear)

Nuclear California Test 375 or ASTM

D2950

91-97 1 per 500 TONS Random locations per CT 375

Stabilometer value (min) d,g

1/2" and 3/4" gradings

California Test

37 1 per 500 TONS Loose mix behind paver per CT 125

Air Void content (%) d, h California Test

4 ± 2 1 per 500 TONS Loose mix behind paver per CT 125

Asphalt binder Various Section 92 Sample 1 per day At plant per CT

Percent of crushed particles Coarse aggregates (%, min) One fractured face Two fractured faces

Fine aggregate (%, min) (Passing no. 4 sieve and retained on no. 8 sieve.)

One fractured face

California Test

1 per mix per plant (sample aggregates 1 per day and hold)

At Plant

Los Angeles Rattler (%, max)

Loss at 100 rev.

Loss at 500 rev.

California Test

Fine aggregate angularity (%, min)

California Test 234 45

Flat and elongated particles (%, max by weight @ 5:1)

California Test

Report only

Voids filled with asphalt (%) i No. 4 grading 3/8" grading 1/2" grading 3/4" grading

California Test

76.0-80.0 73.0-76.0 65.0-75.0 65.0-75.0

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Quality characteristic Test method HMA Type A Frequency Location of Sampling

Voids in mineral aggregate (% min)i

No. 4 grading 3/8" grading 1/2" grading 3/4" grading

California Test

17.0 15.0 14.0 13.0

Dust proportioni No. 4 and 3/8" gradings 1/2" and 3/4" gradings

California Test 367 0.9-2.0

0.6-1.3

Smoothness Section 39-1.12

12-foot straight-edge, must grind, and PI

As necessary to confirm contract compliance

Final pavement surface aThe Engineer determines combined aggregate gradations containing RAP under California Test 367.

b "X" denotes the sieves the Engineer tests for the specified aggregation gradiation.

c The tolerances must comply with the allowable tolerances in section 39-1.02E.

d The Engineer reports the average of 3 tests from a single split sample.

eThe Engineer determines percent of maximum theoretical density if the specified paved thickness is at least 0.15 foot under California Test 375, except the Engineer uses:

1. California Test 308, Method A, to determine in-place density of each density core instead of using the nuclear gauge in Part 4, "Determining In-Place Density By The Nuclear Density Device"

2. California Test 309 to determine maximum theoretical density instead of calculating test maximum density in Part 5, "Determining Test Maximum Density."

f The Engineer determines maximum theoretical density (California Test 309) at the frequency specified for Test Maximum Density under California Test 375, Part 5.D.

g California Test 304, Part 2.13.

h The Engineer determines the bulk specific gravity of each lab-compacted briquette under California Test 308, Method A, and theoretical maximum specific gravity under California Test 309.

i Report only if the adjustment for the asphalt binder content TV is less than or equal to ±0.3 percent from the OBC value submitted on a Contractor Hot Mix Asphalt Design Data form.

If the Acceptance test results do not meet the Acceptance Criteria shown in Table 1 the HMA shall be rejected, removed and replaced as directed by the Engineer at Contractor’s expense.

Field density acceptance testing will be accomplished using the nuclear gauge method. If the density acceptance tests indicate failing compaction results, the Engineer determines a deduction for each test result outside the Acceptance Criteria using the “Reduced Payment Factors for Percent of Maximum Theoretical Density,” table in Section 39-2.03A “Testing” of the 2010 Standard Specifications.

If the Contractor requests verification of the nuclear density results by coring, the Contractor must perform the coring at no cost to the City.

The Engineer will randomly identify core locations and test cores for density at no cost to the City.

The Contractor must backfill the core holes with HMA temperatures above 250°F. The HMA must be firmly tamped in place in lifts not to exceed three (3) inches. Tamping must consist of a minimum of 20 blows with a ten-pound minimum weight bar with an approximate two (2) inch diameter head or by a suitable head attached to a demolition hammer or pneumatic hammer.

The finished surface must be flush with the adjacent pavement surface.

City Project No. FC24FD02 Page 16

MEASUREMENT AND PAYMENT – The Contract unit price paid per linear foot for AC Patch and Repair includes full compensation for providing all labor, materials, tools, equipment and incidentals and for doing all the work involved in this section, including pavement preparation, variations of aggregate gradations, tack coat, placing and compacting HMA, trucking, and sweeping, complete in place, as shown on the plans, as described in the Contract, the Special

Part 7 – Miscellaneous Construction

7.01 Miscellaneous Concrete Construction

All sidewalk, curb and gutter, and driveways shall conform to the provisions in Section 73, "Concrete Curbs and Sidewalks," Section 90, of the Standard Specifications and these Technical Specifications.

This work shall be constructed of minor concrete conforming to the provisions in Section 90-2, "Minor Concrete," except as follows:

1. The maximum size of aggregate used for extruded or slip-formed curb construction shall be at the Contractor’s option, but in no case will the maximum size be larger than one inch nor smaller than 3/8 inch.

2. The cement content of the minor concrete shall be not less than 564 pounds per cubic yard.

Primary aggregate nominal size shall be of 1” x No.4 coarse aggregate gradation per Section 90- 1.02C(4)(b), “Coarse Aggregate Gradation,” of the Standard Specifications.

If within the areas of improvements, Contractor locates AT&T, PG&E, and/or Comcast utility boxes, the Contractor shall not be responsible for setting said utility boxes to grade. However, the Contractor will be responsible for coordinating with AT&T, PG&E, and/or Comcast for the adjustment of the facilities prior to installing new concrete and asphalt concrete. Contractor shall provide written notice of the Contractor’s schedule and coordinate concrete removal activities with the affected utility companies at least 14 calendar days in advance of any concrete demolition work adjacent to the utility facilities. Should the Contractor’s schedule change, the Contractor shall re-notify the utility company in writing at least 14 calendar days in advance of any subsequent concrete demolition work. Contractor shall allow the affected utility company unimpeded access to their facilities for all adjustment work.

Additionally, after the compaction of aggregate base and prior to installing new concrete, the Contractor shall contact Napa Sanitation District (NSD) for inspection of the existing sanitary sewer laterals to confirm damage has not occurred during construction.