Technical_Specifications.pdf

123 N. H Street EV Charging Lot Page 1 of 28 Technical Specifications

CITY OF LOMPOC

DEPARTMENT OF UTILITIES

CALIFORNIA

TECHNICAL

SPECIFICATIONS

FOR

EV CHARGER PARKING LOT PROJECT

123 N. H Street

For use in connection with the Standard Specifications For Public Works Construction ("Greenbook"), latest edition, including all supplementary pamphlets; and the Standard Plans

For Public Works Construction, latest edition, including all supplementary pamphlets.

LICENSE REQUIREMENT: The Contractor shall possess a valid Class A or C-8 License at the time of contract award.

123 N. H Street EV Charging Lot Page 2 of 28 Technical Specifications

The technical specifications contained herein have been prepared by or under the direction of the following Registered Persons.

CIVIL

03-28-2025 Gabriel Do-Reynoso, R.C.E. 81090

ELECTRICAL

03-28-2025 Chris Stephens, E.E. 22907

123 N. H Street EV Charging Lot Page 3 of 28 Technical Specifications

TABLE OF CONTENTS

TECHNICAL SPECIFICATIONS

TABLE OF CONTENTS

BID SCHEDULE

SECTION 1-1 – TECHNICAL SPECIFICATIONS

1-1.1 MOBILIZATION, BONDS & INSURANCE (Bid Item No. 1)

1-1.2 COOPERATION AND COLLATERAL WORK

1-1.3 TRAFFIC CONTROL

1-1.4 CLEARING, GRUBBING, REMOVALS AND DISPOSAL (Bid Item No. 2)

1-1.5 STORM WATER POLLUTION CONTROL PROGRAM (Bid Item No. 3)

1-1.6 CONSTRUCT PCC (Bid Items No. 4-9)

1-1.7 AGGREGATE BASE

1-1.8 REMOVE & REPLACE 3.5” HOT MIX ASPHALT (Bid Item 10)

1-1.9 TRAFFIC STRIPING & MARKINGS (Bid Item 11)

1-1.10 LANDSCAPE – BOULDERS & DECOMPOSED GRANITE (Bid Item 12)

1-1.11 INSTALL BOLLARDS (Bid Item 13)

1-1.12 WHEEL STOPS (Bid Item 14)

1-1.13 INSTALL ELECTRICAL (Bid Item 15)

1-1.14 INSTALL LIGHTING (Bid Item 16)

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BID SCHEDULE

ITEM

NO. ITEM

UNIT OF

MEASURE

ESTIMATED

QUANTITY

UNIT PRICE

(IN FIGURES)

ITEM PRICE

(IN FIGURES)

1 Mobilization, Bonds & Insurance LS 1

Clearing, Grubbing, Removals & Disposal

LS 1

Storm Water Pollution Control Program

LS 1

4 Construct PCC – Curb (Type A1-6) LF 621

5 Construct PCC – Ribbon Gutter LF 114

6 Construct PCC – EV Foundation 24” CF 32

7 Construct PCC – EV Foundation 51” CF 17

Construct PCC – Light Pole Foundation

CF 53

9 Construct PCC – Bollard Foundation CF 59

10 Construct HMA (3.5” Thick) TN 119

11 Traffic Striping & Markings LS 1

12 Landscape (Boulders & DG) LS 1

13 Install Bollards LS 10

14 Wheel Stops EA 16

15 Install Electrical LS 1

16 Install Lighting LS 1

TOTAL BASE BID (Items 1 through 16)

TOTAL BASE BID IN WORDS (Items 1 through 16):

Total Base Bid Amount shall be shown in both words and figures.

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SECTION 1-1 – TECHNICAL SPECIFICATIONS

1-1.1 MOBILIZATION, BONDS & INSURANCE (Bid Item No. 1)

Mobilization shall consist of preparatory work and operations, including but not limited to, those necessary for the movement of personnel, equipment, supplies, and incidentals to the project site; for the establishment of all offices, buildings, construction yards, sanitary facilities, and any other facilities necessary for work on the project; and for all other work and operations which must be performed or costs incurred prior to beginning work on the various contract items on the project site, as well as the related demobilization costs anticipated at the completion of the project. The cost of all bonds and insurance policies, including premiums and incidentals, shall be included in mobilization.

No additional compensation will be allowed for additional mobilizations required, including but not limited to, delays caused by the relocation of, or resolution of conflicts related to existing utility facilities shown on the plans or discovered during construction operations, delays or impacts caused by collateral work, or as a result of delays or changes to order of work caused by environmental concerns, or because of weather or excess moisture in subgrade.

The deletion of work or the addition of extra work as provided for herein shall not affect the price paid for Mobilization.

Payment for "Mobilization, Bonds, & Insurance" will be made at the Contract Lump Sum price named in the Bid Schedule. Said price shall constitute full compensation for all such work, including but not limited to all labor, materials, tools, equipment, services, fees and other costs. Payment for Mobilization will be made as follows, to the extent that such work has been satisfactorily completed:

Up to 50% of the bid item for Mobilization may be paid on the first progress payment.

Up to 90% of the bid item for Mobilization may be paid on the second progress payment.

100% of the bid item for Mobilization, less retention, will be paid once all project work is complete including all clean up and demobilization.

1-1.2 COOPERATION AND COLLATERAL WORK

Cooperation shall be in accordance with Subsection 5-6, "Cooperation," and Subsection 7-7, "Cooperation and Collateral Work," of the Standard Specifications and these Technical Specifications.

The Contractor shall be responsible for ascertaining the nature and extent of any simultaneous, collateral, and essential work by others and coordinating with the work by others. The City, other contractors and utilities shall have the right to operate within or adjacent to the work site during the performance of such work.

Should construction be under way by other forces or by other contractors within or adjacent to the limits of the work specified or should work of any other nature be under way by other forces within or adjacent to those limits, the Contractor shall cooperate with all the other contractors or other forces to the end that any delay or hindrance to their work will be avoided. The right is reserved to perform other or additional work at or near the site (including material sources) at any time, by the use of other forces.

Each contractor shall be responsible to the other for all damage to work, to persons or property caused to the other by their operations, and for loss caused the other due to unnecessary delays or failure to finish the work within the time specified for completion.

The Contractor shall include in its bid all costs involved as a result of coordinating its work with others.

The Contractor will not be entitled to additional compensation from the City for damages resulting from such simultaneous, collateral, and essential work. If necessary to avoid or minimize such damage or delay, the Contractor shall re-deploy its work force.

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Should the Contractor be delayed by the City, and such delay could not have been reasonably foreseen or prevented by the Contractor, the Engineer will determine the extent of the delay, the effect on the project, and any extension of time. Should any agency or utility company’s work result in delays to the Contractor’s work schedule, the Contractor shall be entitled only to an equivalent extension of time for the completion of the contract, and shall not be entitled to damages due to downtime and idled equipment or additional payments over and above the agreed upon unit prices.

Compensation for compliance with all collateral work shall be considered, as being included in the various Contract items in the bid schedule and no additional compensation will be allowed therefore.

1-1.3 TRAFFIC CONTROL

Traffic Control shall be in conformance to the provisions in Section 7-1.03, "Public Convenience," Section 7-1.04, "Public Safety," and Section 12, "Construction Area Traffic Control Devices," of the Caltrans Standard Specifications, the latest edition of the “Work Area Traffic Control Handbook” (WATCH) and these Specifications.

WATCH is published by Building News, Inc. and shall be considered a part of these Specifications. The provisions in this section will not relieve the Contractor from his responsibility to provide such additional devices or take such measures as may be necessary to comply with these and referenced provisions.

A. GENERAL

The work performed under Traffic Control shall consist of:

1. Preparing, submitting, and revising as necessary for City Engineer approval, a Traffic Control Plan, and the implementation of the provisions therein.

2. Expediting the Passage of Public Traffic of all modes – through or around the work, including the closing of traffic lanes and streets. The Contractor shall furnish, install, and maintain signs, detours, lights, flares, barricades, and shall furnish flagmen and other facilities for the convenience and direction of public traffic.

3. Maintaining Traffic Control – If any component in the traffic control system is displaced, or ceases to operate or function as specified, from any cause, during the progress of the work, the Contractor shall immediately repair said component to its original condition or replace said component and shall restore the component to its original location.

B. NOTIFICATON

1. Residents, Property Owners, Organizations - The Contractor shall notify businesses, residents and property owners adjacent to the construction area and the City's ambulance service, Fire Department, Police Department, Transit Service, Sanitation Department, adjacent schools, and the School District Office, of any possible closure of streets or alleys at least 5 days in advance of any start of construction. The Contractor shall cooperate with local authorities relative to handling traffic through the area and shall make his own arrangements relative to keeping the working area clear of parked vehicles.

a. Contractor shall supply all notification cards and flyers.

b. Contractor shall submit samples of cards and flyers for City approval prior to use.

2. Driveway, Lane And Street Closure – The Contractor shall notify the Engineer at least 5 days in advance of any planned driveway, lane, street, or alley closures, lane width reduction, or vertical clearance reduction. Driveways, lanes, streets and alleys shall be closed to traffic in accordance with the approved Traffic Control Plans, and only for as short a period as possible to complete the work. Driveways, lanes, streets and alleys shall not be closed to traffic without approval of the Engineer, and then only for as short a period as possible to complete the work. All closed commercial and multi-dwelling driveways, lanes, streets or alleys shall be barricaded at all

123 N. H Street EV Charging Lot Page 7 of 28 Technical Specifications intersections with Type III barricades with signs and flashers, and with other necessary measures.

3. The Contractor shall also post printed “NO PARKING –TOW AWAY” signs at 50-foot (50’) maximum spacing along each side of the affected street or facility for not more than five, nor less than two working days prior to the commencement of improvements requiring the roadway to be cleared of parked cars. The Contractor shall document the day, date and time the “NO PARKING” signs were posted. Posting of signs on trees and utility poles will not be allowed.

a. The signs shall contain the day, date, hours that parking will be prohibited on that particular street, CVC 22651L and CVC 22654D. The signs shall be removed immediately upon completion of work that will prohibit parking.

b. The printed notices and “NO PARKING” signs shall be furnished by the Contractor.

4. Underground Service Alert – The Contractor shall notify Underground Service Alert, Southern California (USA), Telephone: 811 or 1 (800) 422-4133 for operations of subsurface installations at least 2 working days, but not more than 14 calendar days, prior to commencing any excavation for construction area sign posts.

C. USE BY PUBLIC TRAFFIC

Except as otherwise provided, the full width of the traveled way shall be open for use by public traffic on Saturdays, Sundays, and designated legal holidays; at the end of each working day (after 5:00 p.m.); and when construction operations are not actively in progress, except as necessary for PCC curing as approved by the Engineer. Contractor shall bear sole responsibility for public safety and for protection of all property and improvements.

D. PERSONAL VEHICLES

Personal vehicles for the Contractor's employees shall not be parked on the traveled way or shoulders, including any section closed to public traffic.

E. PAYMENT

Full compensation for performing all necessary work under Traffic Control shall be considered as being included in the various Contract items in the bid schedule and no additional compensation will be allowed therefore.

1-1.4 CLEARING, GRUBBING, REMOVALS AND DISPOSAL (Bid Item No. 2)

Clearing, Grubbing, Removals and Disposal shall be performed in accordance with the provisions of the Standard Specifications and these Technical Specifications, the Plans and shall include the following:

1. Removing all natural and artificial objectionable materials from the construction areas, and handling them in accordance with the contract documents, including but not limited to legally disposing of such materials outside of the project site.

2. Saw cutting and removal of existing HMA improvements as indicated on the plans, and as necessary to construct proposed work shown on the plans, which includes but may not be limited to curb, ribbon gutter, and electrical improvements. All HMA removals shall be saw cut to neat, clean edges as approved by the Engineer.

3. Saw cutting, removal and disposal of AC paving to clean straight lines as indicated on the plans or City Standard Details, cutback for the construction of PCC improvements and Hot Mix Asphalt (HMA) improvements.

4. Removal of roots shall extend at least to a depth of 12” into the subgrade in areas of sidewalk, parkway, driveway, or other areas not otherwise designated; and shall extend at least to a depth

123 N. H Street EV Charging Lot Page 8 of 28 Technical Specifications of 36” into the subgrade in roadway areas; or deeper if necessary to provide uniform compacted subgrade.

5. Removal and disposal of rock, PCC, and excess soil, or other material as necessary to construct the proposed work to the depths and grades required.

6. After removal of designated areas of AC, preparation of subgrade, and furnishing, placement and compaction of base in order for Contractor to perform HMA paving and patching per City Standard Detail 609 and other applicable City Standard Details.

7. All portions of trees and shrubs overhanging less than 10 ft directly above the entire sidewalk surface shall be trimmed and the trimmed material shall be removed by the contractor to allow a clear path of travel for pedestrians as possible. Dead, dying, and unacceptably damaged grass shall be replaced with new grass sod.

8. Removal and salvage of existing signs within the limits of work, to the City Yard as directed by the Engineer.

9. The Contractor shall dispose all materials not being salvaged outside of the right-of-way and shall pay for all costs for disposal.

10. Removal and disposal of any abandoned utilities that may interfere with the improvements.

11. Stockpiling of materials within the right-of-way, city parking lots, or other city-improved property shall not be allowed unless otherwise approved by the Engineer.

12. Self-propelled drop hammers will not be allowed for removals.

13. All work associated with demolition, salvage, and removals not specifically paid for in other bid items.

A. PAYMENT

Payment for Clearing, Grubbing, Removals and Disposal shall be at the contract LUMP SUM price and shall be considered to include full compensation for furnishing all, labor, materials, tools, equipment, disposal costs, and incidentals for doing all work involved for the all items specified herein, in the Plans, and in the Standard Specifications, and no additional compensation shall be allowed.

1-1.5 STORM WATER POLLUTION CONTROL PROGRAM (Bid Item No. 3)

A. GENERAL

The Contractor shall provide a Storm Water Pollution Control Program (SWPCP) which describes in specific detail the Contractor’s program to prevent contamination of the storm water collection system.

The program shall address both common construction activities and extraordinary events.

The SWPCP shall comply with the requirements of the storm water quality management plans of the local governing jurisdictions. The plan shall address the prevention of particulates or pollutants from entering the storm water system from the job site, whether due to routine operations or spills.

B. CONSTRUCTION

The Contractor shall continuously provide at the job site all of the tools, equipment, and materials necessary to implement the SWPCP. This requirement shall be enforced at all times from project initiation through completion, including any punch list or warranty work on the project.

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1. Submittal

The Contractor shall submit one electronic original and up to three paper copies of the SWPCP a minimum of ten working days prior to beginning construction. Construction shall not begin until the SWPCP is approved.

2. Protection of Existing Storm Water System

As the first order of work, the Contractor shall protect the existing storm water system from entrance of particulates and pollutants. Such protection shall include implementing the Best Management Practices (BMP) as outlined in the SWPCP.

In addition to the Best Management Practices outlined in the local governing jurisdiction’s plans, the protection system shall have a minimum of three features:

a. A particulate filter of geosynthetic material securely fastened in place such that it cannot be bypassed without significant physical damage,

b. A pre-filter for the particulate filter, and

c. On-hand materials to close-off an inlet or opening in the case of a significant pollution spill.

The Contractor shall utilize materials and methods which both protect the storm water system from the entrance of particulates, and allow storm water to pass through such materials in order to be conveyed away by the storm water system. The Contractor shall monitor and report to the Engineer the effectiveness of the materials and methods utilized for this project during and following storm events and shall make the modifications necessary to achieve the stated goals of protection and conveyance of storm water.

The Contractor shall also provide, install, and maintain all necessary additional traffic control signage in order to safely convey public traffic of all modes through or around the streets and storm water system components affected by the project work and impacted by storm events.

3. Excavation Areas

The Contractor shall prevent damage to the work, and to all other existing improvements, features, and areas. The Contractor shall repair, restore, clean up, and completely remedy at its sole expense, and as approved by the Engineer, any damage caused in whole or in part due to its operations, including but not limited to any damage caused by storm water to the work, or by storm water conveying materials from the work site or storage areas.

If rain begins during the Contractor’s excavation operations or during other operations by the Contractor which could be damaged by storm water or could cause damage by being in contact with storm water, then the Contractor shall cease excavation or operations, and shall immediately protect all excavations and other such work from storm water.

The Contractor shall protect all excavations and other such work areas for which finished surfacing has not been placed, or has not completely cured or stabilized, and adjacent land and improvements which may be affected by the work, from storm water damage, and shall prevent particulate and other material transport from such areas. Contractor shall employ methods necessary to prevent storm water from transporting particulates and other materials including but not limited to transporting particulates onto streets or into the storm water system.

4. Material Storage Areas

All material and/or equipment storage areas where construction materials, equipment, or waste is kept, including but not limited to excavated materials, base materials, and patching materials, shall be protected from transport by wind, water, or other means.

All material and/or equipment storage areas where liquid construction materials are kept, including but not limited to asphalt emulsions, paving oils, and seal coat materials, shall be

123 N. H Street EV Charging Lot Page 10 of 28 Technical Specifications protected by a physical barrier capable of containing the entire volume of stored liquid materials.

During active construction activities, portions of the barrier may be removed for access.

However, the barrier materials must be readily accessible for replacement by on-site construction personnel. The barrier must be in place at all times when construction personnel are absent from the storage site.

5. System Inspection and Maintenance

The Contractor shall inspect and repair or replace any damaged or clogged element on a daily basis. During periods of precipitation where runoff occurs, the system shall be checked twice daily, seven days a week, whether or not any work has been performed. The daily checks shall be between 6 a.m. and 9 a.m., and 4 p.m. and 8 p.m.

The Contractor shall provide a monitoring log of each inspection.

6. Non-Storm Spills or Pollution

The SWPCP shall address practices for the clean-up of spilled or leaked pollutants such as hydraulic oil from damaged or leaking equipment. The plan shall include readily available equipment and materials to contain and absorb the pollutants, collection of these materials, and disposal of the materials to an approved disposal facility. The plan shall include ultimate disposal from the Contractor’s yard.

The Contractor shall keep a record of any spills on the daily inspection logs. In addition, at the end of the project, the Contractor must certify that all contaminated materials have been properly disposed of in accordance with the SWPCP.

C. MEASUREMENT AND PAYMENT

The Contractor shall be paid for the work of preparing, implementing, inspecting, maintaining, and removing the SWPCP on a lump sum basis as indicated in the Bid Schedule.

The bid item shall not be less than $ 1,000.

In addition, failure to perform and document the required daily inspections shall result in a daily penalty of $250.00 per calendar day. The imposition of the penalty shall not relieve the Contractor of any obligations of these project requirements.

Payment of the contract bid price includes all work involved under the bid item for the SWPCP, and may be made on a partial payment system based on the completion of the following stages of the work:

Work Description Payment Percentage

Develop plan 10% of bid price

Initial plan implementation 10% of bid price

Removal of BMP’s at completion 10% of bid price

Inspection and Maintenance of SWPCP 70% of bid price/contract time in working days

1-1.6 CONSTRUCT PCC (Bid Items No. 4-9)

Construct PCC work shall conform to the provisions in Sections 200, “Rock Materials;” 201, "Concrete, Mortar and Related Materials;” 300-1 “Clearing and Grubbing;” 301, “Treated Soil, Subgrade Preparation, and Placement of Base Materials;” and 303 “Concrete and Masonry Construction” of the Standard Specifications, the Plans, these special provisions, and the City Standards.

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A. DESCRIPTION - The work shall consist of constructing Portland Cement Concrete (PCC) curb, ribbon gutter, foundations, and other minor concrete structures to the form and dimensions shown on the Plans, and to the grades and slopes shown on the Plans and/or established by the Engineer in the field, and/or as necessary to comply with Americans with Disabilities Act (ADA) standards and the contract documents. The work shall include all necessary grading, and preparatory work, including that described in Section 1-1.4 Clearing, Grubbing, Removals & Disposal of these Special Provisions, and Section 300-1 of the Standard Specifications.

Additionally, the work shall include furnishing, placing, and compacting all necessary approved backfill material to bring the adjacent unimproved area up to the grade of the PCC improvements.

B. SUBMITTALS - Attention is directed to Section 2-5.3, "Submittals”, of the Standard Specification.

1. Add to Subsection 201-1.1.1, "General", of the Standard Specifications, the following:

a. The Contractor shall furnish the Inspector in the field with a copy of the delivery tickets clearly indicating the approved project mix design, and with a legible certified weigh masters certificate for each load of PCC delivered to the project. PCC delivered to the project site having a water content and/or slump greater than that specified in the mix design shall be rejected and removed from the project site.

2. Portland Cement Concrete mix design and mix test data.

3. Aggregate base gradation and source data.

4. Reinforcing steel grade, composition, and source data.

C. MATERIALS

1. Portland Cement Concrete (PCC) class 310-C-17 (520-C-2500) designated in Table 201- 1.1.2(A) of the Standard Specifications for ribbon gutter and pole light foundations is amended as follows:

Concrete class shall be 310-C-21 (520-C-3250)

2. Aggregate Base - Aggregate base shall conform to the requirements of Subsection 200-2.2, "Crushed Aggregate Base," or Subsection 200-2.4, "Crushed Miscellaneous Base" of the Standard Specifications and these special provisions.

3. Reinforcing steel shall be Grade 60 conforming to Section 201-2 of the Standard Specifications, shall be manufactured in the United States and shall conform to the federal “Buy America” requirements for steel in US DOT funded projects.

D. CONSTRUCTION

1. Contractor shall schedule and perform all work to minimize public inconvenience and to promote efficient conveyance of traffic of all modes (vehicle, bicycle and pedestrian).

Contractor shall minimize weekend closures of ramps, sidewalks, spandrels, and related improvements. Contractor shall keep existing sidewalks and ramps along one side of each street open at all times. The quantity and locations of work performed concurrently shall be subject to the approval of the Engineer.

2. Prior to mobilizing crews or performing removals, Contractor shall make all necessary measurements and verify the proposed work will fit, appropriately match into existing or other proposed improvements, comply with ADA and City standards, and meet the intent of the contract documents. The Contractor shall immediately inform the Engineer of any errors, issues, or discrepancies related to the above, and shall adjust its schedule to accommodate resolution of such occurrences through coordination with the Engineer. The City shall not be responsible for delays or related costs which could have been avoided by timely performance of the above required work by the Contractor, as determined by the Engineer.

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3. Removals shall be performed as indicated in the contract documents, as necessary to perform the work, and as directed by the Engineer.

4. No PCC shall be ordered and/or placed until the forms and subgrade have been inspected and approved by the Engineer in the field.

5. Subgrade shall be graded to the correct elevations and slopes and compacted to a minimum of 95% relative compaction within the proposed locations shown on the plans or described by the contract documents, prior to placement of base, sand, or concrete.

6. 8” of aggregate base shall be placed and compacted under all curb, ribbon gutters, and foundations, and as otherwise called out on the plans.

7. Curing compound shall be translucent with red fugitive dye, Type 1, in accordance with Section 201-4, “Concrete Curing Materials”, of the Standard Specifications.

8. Contractor shall place expansion joint material around all utility poles, and wherever required by the City Standards, and as directed by the Engineer. Wherever expansion joint material is used, it shall extend through the full depth of PCC, and both the material and the placement shall be as approved by the Engineer.

9. Each load of PCC shall be placed within 1.5 hours after it is batched at the plant.

Additionally, PCC shall be less than 90°F when placed. All PCC not meeting those requirements shall be rejected.

10. In order to minimize vandalism damage to the finished PCC surfaces, the Contractor shall plan his work so that no PCC is poured after 1:00 p.m., unless otherwise authorized by the Engineer in the field.

11. The Contractor shall barricade and protect placed PCC from all damages, marks, mars, and/or graffiti. Any PCC damaged, defaced, or defective shall be replaced to the satisfaction of the Engineer at the Contractor’s expense, and no additional time will be allowed.

Grading, patching, or other remedies to correct the situation will not be accepted unless in the opinion of the Engineer the vandalized area is so small that it does not warrant replacement.

Concrete replacement areas shall be from score mark or control joint to score mark or control joint, and full width of the sidewalk. All replacement areas shall be saw cut.

12. Native material shall be placed in all voids in the parkway within 24 hours after the removal of any concrete forms.

13. Areas adjacent to proposed concrete improvements shall be graded as called out on the plans, and as directed or approved by the Engineer. Typical grading requirements shall include providing a 1’ wide level area immediately adjacent to proposed PCC, having an elevation either equal to proposed PCC or not more than one inch lower than proposed PCC;

and from edge of 1’ wide level area, grade cut or fill as necessary having maximum slope of 3 horizontal to 1 vertical (3:1) to match existing grade. No grading or work shall be performed outside of the City right of way (ROW) unless necessary agreements with affected property owners have been made, and such work is approved or directed by the Engineer. All fill material shall be compacted to a minimum of 90 percent relative compaction per ASTM 1557, unless otherwise directed by the Engineer.

14. Hot Mix Asphalt in conformance with these Technical Specifications shall be placed in all voids within the effected streets and alleys not sooner than the fourth calendar day following PCC placement, and not later than the 15th calendar day following PCC placement.

Additionally, the Contractor shall comply with revisions to the above timeframe as directed by the Engineer. Contractor shall be continually responsible for adequately barricading and delineating all such voids and unfinished work, to prevent injury or damage. Contractor shall also be responsible for facilitating public access as required by the Engineer, and where required, shall temporarily fill voids with compacted base or other material approved by the

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Engineer. Payment for placing HMA within 2’ adjacent to PCC improvements shall be considered as included in the price of the PCC item of work.

15. Curb and ribbon gutter flow lines shall be water tested before concrete has set to ensure maximum flow when design grade is less than .25% (S = 0.0025).

16. All concrete work shall conform to the following standard plans, except as otherwise approved or directed by the Engineer:

a. Curb / Curb & Gutter – City Standard Drawing No. 602

b. Sawcut Detail – City Standard Drawing No.609 & No.609-A

E. BEST MANAGEMENT PRACTICES - The following Best Management Practices shall be observed:

1. Sawcut concrete in dry weather, whenever possible. Protect nearby storm drain inlets and water bodies with sandbags around inlets and work areas where debris could be introduced into a water body.

2. After removal, recycle concrete material and sweep area thoroughly.

3. Use as little water as possible during sawcutting operations. Block or berm around storm inlets, drainage channels and watercourses with sandbags or absorbent materials to contain slurry. If slurry enters the storm system, remove immediately.

4. When sawcutting to make repairs to utility lines or for other repairs, collect and deposit debris and earth away from any water and ensure that pollutants do not contact water from saw cutting or necessary repair work.

5. Remove sawcut slurry, with a shovel or vacuum or by sweeping when dry, as soon as possible.

6. Avoid mixing excess fresh concrete or cement mortar on-site.

7. Store dry and wet concrete materials under cover, protected from rain and run-off.

8. Washout concrete transit mixers only in wash out areas where water will flow into settling ponds of dirt, aggregate base or sand, located away from a watercourse. If possible, recycle wash water by pumping back into mixers for reuse. Do not dispose of washout into storm system.

9. Whenever possible, reuse or recycle small amounts of excess concrete, grout and mortar.

Allow excess to set in concrete forms and reuse or dispose of excess at the landfill.

10. Place tarps or drop cloths under mixers when mixing concrete over impervious surfaces.

Hose down mixers, tools, and other equipment in a dirt area where the rinse water can soak into the ground and not run into the creek or storm drain.

11. Sweep surfaces at the end of the day and dispose of swept materials properly.

F. MEASUREMENT

1. Measurement for Construct PCC will be per the unit of measure of each respective item as designated in the Bid Schedule and in accordance with the Project Plans and Specifications.

a. Measurement for PCC curb and ribbon gutter shall be in linear feet as measured along the face of the curb.

b. Measurement for the remaining PCC improvements shall be by square foot as measured along the plane of the finished concrete surface. All retaining curb which abuts the area of parking lot and planter improvements shall be included in the curb linear foot measurement.

G. PAYMENT

Payment for Construct PCC will be made at the Contract unit price for each respective item.

Such payments shall be considered to include full compensation for Best Management Practices and for furnishing all labor, materials, tools, equipment, and incidentals, including cleanup and disposal, and for doing all the work involved in the placement of PCC shown on the Plans, as specified in these Technical Specifications, and as directed by the Engineer.

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1-1.7 AGGREGATE BASE

This work shall consist of all labor, materials, tools, equipment, removals, disposal, and incidentals required for clearing and grubbing and preparing the subgrade prior to the placement, and including the furnishing, placing, grading and compacting of aggregate base material to be used as driveway material and sidewalk backing as shown on the Plans. Subgrade shall be excavated to required depth and slope and compacted to at least 95% relative compaction.

Aggregate base shall conform to the requirements of Subsection 26-1.02B, "Class 2 Aggregate Base," of the Caltrans Specifications and these Technical Specifications.

No separate measurement or payment shall be made for Aggregate Base. The cost of Aggregate Base work shall be considered to be included in other associated items of work, which shall include full compensation or furnishing all labor, materials, tools, equipment, removals, disposal, and incidentals, and no additional compensation will be allowed therefor.

1-1.8 REMOVE & REPLACE 3.5” HOT MIX ASPHALT (Bid Item 10)

• GENERAL

Work to be performed under this Section covers all labor, materials, tools, equipment, transportation, disposal, and incidentals necessary to sawcut and remove existing AC; remove any additional base, subgrade and other materials as necessary to construct the proposed work; prepare and compact subgrade; and furnish, place, grade and compact Hot Mix Asphalt (HMA).

All such work shall conform to the applicable provisions of the State of California, Department of Transportation, Standard Specifications (Caltrans, as modified by these Special Provisions, and the plans and details. Section 39-2 “Standard Construction Process” of the Caltrans Standard Specifications shall be followed to the extent applicable.

All HMA shall be either Lime Treated or treated with a sufficient percentage of liquid antistrip to prevent stripping and meet the requirements of the specifications.

• MATERIALS

All hot mix asphalt materials shall be as specified in Section 39, “Hot Mix Asphalt”, of the Caltrans Standard Specifications; these Special Provisions; and the plans and typical sections.

Coarse Aggregate Durability CTM 229 65 minimum

Fine Aggregate Durability CTM 229 50 minimum

1. Mix Types

Generally, the hot mix asphalt to be used will be as follows unless modified by the Engineer:

Base Courses: ¾ inch Maximum, Type A, hot mix asphalt for base courses greater than 2-1/2 inches (0.20 feet or 65 mm).

½ inch Maximum, Type A, hot mix asphalt for base courses of 2- 1/2 inches (0.20 feet or 65 mm) or less.

Surface Courses: ½ inch Maximum, Type A, hot mix asphalt for surface courses of 2-1/2 inches (0.20 feet or 65 mm) or less on residential minor collectors; surface courses less than 2 inches (0.17 feet or 50 mm) on collectors and arterials; and on all alleyways and parking lots.

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¾ inch Maximum, Type A, hot mix asphalt for surface courses greater than 2 inches (0.17 feet or 50 mm) on collectors and arterials.

2. Binder Type – The asphalt grade shall be PG 64-10 and shall conform to Subsection 92-1.02(B) of the Caltrans Standard Specifications.

3. Lime or Liquid Antistrip Treatment – The HMA shall be either lime treated or treated with a sufficient quantity of liquid antistrip to prevent stripping and to meet the requirements of these specifications.

4. Tack coat – Tack coat shall be utilized and will be emulsified asphalt Grade RS-1, RS-1h, SS-1, or SS-1h and shall conform to Section 94, ‘Asphaltic Emulsions’, of the Caltrans Standard Specifications.

5. Contractor-Supplied Job Mix Formula (JMF) – The Contractor will be required to furnish the Engineer with a JMF for each type of hot mix asphalt to be used on the project. The JMF shall include a list of material sources and a Certificate of Compliance signed by the material supplier or his representative indicating that the materials to be incorporated in the work fulfill the requirements of these specifications. This submission shall be provided at least fifteen calendar days or ten working days prior to the planned start of work. If requested, the contractor shall also provide aggregate and binder samples and/or a plant produced mix sample for mix design verification. The mix designs shall be prepared by laboratories and personnel with current Caltrans or AASHTO certification.

The hot mix asphalt mixtures shall conform to all of the provisions of Section 39 of the Caltrans Standard Specifications and to the following requirements:

For arterial and collector streets the hot mix asphalt air void content shall be between 3% minimum and 4.5% maximum and the S-value shall be 40 or greater.

For parking lots and residential streets the hot mix asphalt air void content shall be between 3% minimum and 4.5% maximum and the S-value shall be 35 or greater.

As a minimum, the mix design shall indicate the percentage passing for each specified sieve, the percent of asphalt, the laboratory compacted unit weight (in lb/ft3), the theoretical unit weight (Rice Gravity), and the stability of the mix, and any other necessary information requested by the Engineer, for each hot mix asphalt mixture to be incorporated on the project. The mix design, with allowable tolerance for a single test, shall be used for job control.

6. Delivery Tickets – Each delivery ticket shall 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.

• CONSTRUCTION

The minimum ambient temperature to begin paving shall be 55 degrees Fahrenheit. Paving shall not continue to be performed if the ambient temperature drops below 55 degrees Fahrenheit or if rain, fog, or other moisture dampens the ground surface.

The pavement areas designated to be replaced shall be removed to a uniform depth as specified, and may be removed either by cold planing or by full depth saw cutting and mechanical removal as long as clean vertical edges are provided for the full depth of removal. Any broken or damaged pavement edges shall be re-cut prior to paving. All removed material shall be cleared from the site.

The excavated areas shall be graded as shown on the plans as necessary to provide a uniform pavement thickness. The base rock or native soil shall be compacted to 95% relative compaction.

Compaction testing shall be performed in accordance with either CTM 216 and 231 or ASTM D-1557, D-2216, D-2922, and D-3017. All segregated or loose material shall be removed.

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On areas where the underlying material appears to be wet or soft or where it deflects under wheel loads, the Contractor shall employ excavation and work techniques which do not worsen the subgrade condition.

Prior to placing aggregate base or hot mix asphalt, each pavement replacement area shall be proof-rolled with a loaded construction vehicle, preferably a ten cubic yard dump truck or equivalent. The compacted surface shall not visibly yield or deflect. Soft, yielding, unstable, or unsuitable areas shall be removed and replaced with base rock or hot mix asphalt. If the areas were caused or significantly worsened by the Contractor’s operations, these areas shall be replaced at the Contractor’s expense.

In the event that the underlying material is soft, yielding, unstable, or unsuitable, it shall be excavated to a depth of 0.5 feet below the depth required above and disposed of in accordance with these Special Provisions. The limits of removal shall be designated by the Engineer. The resulting space shall be filled with a single lift of hot mix asphalt, which shall be rolled and compacted to the extent feasible without creating an uneven surface or damaging the HMA.

Unsuitable material is defined as material the Engineer determines to be:

1. Of such unstable nature as to be incapable of being compacted to specified density using ordinary methods at optimum moisture content, or

2. Too wet to be properly compacted and circumstances prevent in-place drying prior to incorporation into the work, or

3. Otherwise unsuitable for the planned use.

After compaction of the sub-grade, aggregate base shall be placed and compacted to 95% relative compaction. All horizontal and vertical edges and surfaces of existing pavement or concrete against which HMA will be placed, shall receive a tack coat immediately prior to paving. Additional tack may be necessary between hot mix asphalt courses. No prime coat shall be required. A tack coat between layers of hot mix asphalt shall be required if not paved on the same day or if the surface has been contaminated or soiled. Any contamination or soiling shall be thoroughly cleaned and a tack coat placed between layers immediately prior to paving.

Contractor shall construct the ADA compliant van accessible parking space, accessible walkway, and ramp to the following restrictions:

• Walkway and ramp cross slope and landings shall be less than or equal to 2.0%.

• Walkway longitudinal slope shall be less than 5.0%.

• Ramp longitudinal slope shall not be less than 7.0%, and shall not exceed 7.5%.

Contractor shall use grades and calibrated digital smart levels to ensure quality compliant construction. Smart level must be used prior, during, and after the placement of concrete.

Segregation shall be minimized and the surface shall be free from pockets of coarse or fine material.

HMA containing hardened lumps shall not be used.

Where feasible, the asphalt mixture shall be spread by the spreading equipment at a uniform rate so as to provide the required compacted thickness without resorting to spotting, picking-up, or otherwise shifting the mixture.

Care shall be taken to assure compaction of the inside corners of the first lift. Ramping shall not be allowed on the course placed immediately prior to the surface course.

Except for removals under an overlay, a minimum of two lifts shall be used for each replacement area with a depth greater than three inches. The surface course shall be 1-3/4 inches minimum thickness.

Remove & Replace under overlays can be placed in a single lift up to a lift thickness of five (5) inches.

The repaired areas shall conform to the level of the surrounding pavement so that no elevation variation is evident. The surface shall have a maximum variation from high to low of 0.01 feet maximum when measured with a twelve-foot level. Variation at the edges shall not exceed 0.01 feet maximum. When matching existing pavement, the finished surface shall not inhibit drainage. The upslope edge of the cold plane or replacement shall be 0.00 feet high to 0.01 feet low. On the

123 N. H Street EV Charging Lot Page 17 of 28 Technical Specifications downslope edge of the digout or replacement, the finished surface shall be 0.01 feet high to 0.00 feet low. Any resulting variations shall be corrected to the satisfaction of the Engineer.

Rolling and Compaction:

In addition to the requirements of Section 39 of the Caltrans Standard Specifications, the number of rollers required for each paving operation shall be such that all rolling for density is completed before the temperature of the hot mix asphalt mixture drops below 240 degrees Fahrenheit.

Breakdown rolling shall commence when the hot mix asphalt is placed. Rolling shall be accomplished with the drive wheel forward and with the advance and return passes in the same line.

Contractor shall have hand-compaction equipment immediately available for compacting all areas inaccessible to rollers. Hand-compaction shall be performed concurrently with breakdown rolling. If for any reason hand-compaction falls behind breakdown rolling, further placement of hot mix asphalt shall be suspended until hand-compaction is caught up. Hand-compaction includes vibraplates and hand tampers. Hand torches shall be available for rework of areas which have cooled.

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

Sampling:

The Engineer may sample the hot mix asphalt from truck beds at the plant, from the hopper of the spreading machine, or from the completed mat at the discretion of the Engineer. The Contractor shall facilitate the sampling process.

Temporary Transitions:

The Contractor shall construct temporary pavement transitions at all paving joints greater than 1 inch prior to allowing traffic onto the paved surface. This includes both longitudinal and transverse paving joints for both leveling and surface courses. Temporary pavement transitions shall have a maximum slope of 20:1 or as approved by the engineer and be constructed on Kraft paper or other suitable bond breaker such that upon removal of the temporary pavement transition, a clean vertical face remains. The temporary transitions may be constructed of either cold mix or hot mix. A tack coat is required on the transition area prior to final paving.

The Contractor shall continuously maintain the temporary pavement until final paving. Each temporary transition shall be inspected by the Contractor and repaired as necessary to comply with these provisions at the end of each day including weekends and holidays.

Failure to comply with these provisions will result in a liquidated damage of $250 per day per transition and/or the cost of City crews making the repairs if necessary to correct for public safety.

D. MEASUREMENT AND PAYMENT

Payment for a 2’ width of HMA removal and replacement adjacent to PCC work such as curb, ribbon gutter, etc, is included in the unit price paid for those construct PCC items, and no additional compensation will be allowed therefor. Payment for any other HMA required by the contract documents shall be considered as included in the price paid per TON for the HMA required of contract work, and no additional compensation will be allowed therefor.

1-1.9 TRAFFIC STRIPING & MARKINGS (Bid Item 11)

A. GENERAL

The work consists of replacing, in all areas affected by the work, the existing pavement striping, markings, and raised pavement markers, or making modifications indicated on the plans and in the specifications or as directed by the Engineer, and updating all such work to the Caltrans Standard Plans and Specifications and the current California Manual on Uniform Traffic Control Devices (CA- MUTCD) standards as approved by the Engineer.

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B. MATERIALS

Traffic striping & marking materials shall be per the provisions of the applicable Sections of the Caltrans Standard Specifications, including Sections 84 and 85, and the California Manual on Uniform Traffic Control Devices, except that all traffic markings and striping constructed with Rapid Dry Paint shall be made in two (2) applications, one (1) day minimum between each application, each at the specified application rate.

Paint for striping and markings shall be Rapid Dry, Water Borne, conforming to current Caltrans specifications.

The thickness of all paint striping and markings installed shall be as recommended by the paint manufacturer, and as approved by the Engineer, and shall be a minimum of 15 mils.

All striping and markings shall be paint.

C. CONSTRUCTION

Striping, and markings shall be installed in accordance with the Plans and as approved by the Engineer. Methods of application shall conform to Section 84 Traffic Stripes and Pavement Markings and Section 85 Pavement Markers, and to other applicable sections of the…