ATTACHMENT B Technical Specs Slurry~2.pdf

CITY OF REDMOND

Technical Specifications and Special Provisions

2024 TYPE III SLURRY PROJECT

City of Redmond Public Works Department Street Operations Division

243 E. Antler Ave Redmond, Oregon 97756

541.504.2000

ATTACHMENT B

TECHNICAL SPECIFICATIONS, SPECIAL PROVISIONS

2018 OREGON STANDARD SPECIFICATIONS FOR CONSTRUCTION

(AVAILABLE FROM OREGON DEPARTMENT OF TRANSPORTATION WEBSITE)

https://www.oregon.gov/ODOT/Business/Pages/Standard_Specifications.aspx

SECTION 00110 – ORGANIZATION, CONVENTIONS, ABBREVIATIONS

AND DEFINITIONS

00110.20 Definitions - Modify as follows:

As Approved –Add the following:

The words “as approved”, unless otherwise qualified, shall be understood to be followed by the words “by the City”.

Agency – Replace with the following:

The City of Redmond.

City – Add the following:

The City of Redmond, Oregon, including its duly authorized representatives. The city is described as the Agency in the OSS documents.

Developer – Add the following:

A private entity who has expressed the intention of providing, or who has undertaken the providing of some facility, structure, or like project to be accepted for maintenance and ownership by the City.

Engineer – Replace with the following:

The Project Manager or designee.

Laboratory - Add the following:

Any laboratory used or approved by the City of Redmond. This may or may not be the same testing laboratory as designated in the OSS.

Legal Holiday – Add the following:

The following, subject to subsequent change by law, are legal holidays for the City /Agency: Sunday, New Year’s Day, Martin Luther King Jr. Day, President’s Day, Memorial Day, Independence Day, Labor Day, Veteran’s Day, Thanksgiving and the day after Thanksgiving, Christmas, and those days declared as holidays by the City. When a legal https://www.oregon.gov/ODOT/Business/Pages/Standard_Specifications.aspx holiday falls on Saturday, the Friday proceeding Saturday is a legal holiday. When a legal holiday falls on Sunday, the immediately following Monday is a legal holiday.

Other references to Legal Holidays in the 2018 OSS will comply with the modified definition of “Legal Holiday.”

Plans – Delete and Replace with the following:

The term “Plans” refers to the official plans, profiles, cross-sections, elevations, details, and other working drawings and supplementary drawings, or reproductions thereof, signed by the Engineer, that show the location, character, dimensions and details for the work to be performed. Plans may either be bound in the same book as the balance of the Contract Documents, or bound in separate sets, and are a part of the Contract Documents regardless of the method of binding. Plans are Standard and Supplemental Drawings, and approved unstamped and reviewed stamped Working Drawings

Working Day – Add the following:

The City working day is any and every calendar day excluding Saturdays, Sundays, and legal holidays. Unless otherwise permitted, a working day occurs between the hours of 7:00 AM. and 5:00 PM.

SECTION 00120 - BIDDING REQUIREMENTS AND PROCEDURES

Section 00120 Bidding Requirements and Procedures - Delete in its entirety and Replace with:

Bidding Requirements are stated in the Bid/Contract Documents.

SECTION 00130 - AWARD AND EXECUTION OF CONTRACT

Section 00130 Award and Execution of Contract - Delete in its entirety.

SECTION 00140 - SCOPE OF WORK

00140.00 Purpose of the Contract – Add the following bullets:

• Contract Documents or Plans may be obtained upon request by paying the actual cost of reproducing the Contract Documents or Plans.

• Nothing in the Agreement shall be construed as vesting in the Contractor any right to the property or in the material used after acceptance by the City. All materials shall become the property of the City upon being accepted.

• City shall furnish, as indicated in the Contract Documents and not later than the date when needed by Contractor, the lands upon which the Work is to be done, access rights-of-way, and other lands that are designated for the use of Contractor.

Easements for permanent structures or permanent changes in existing facilities will be obtained and paid for by the City, unless otherwise specified in the Contract Documents. If Contractor believes that any delay in City furnishing these lands or easements entitles him/her to an extension of the Contract Time, Contractor may make claim thereof. The Contractor shall provide for all additional lands and access thereto that may be required for temporary construction facilities or storage of materials and equipment.

• The Contractor shall confine its equipment, the storage of materials, and the operation of its workers to limits shown on the plans or indicated by law, ordinances, permits, or directions of the Engineer, and shall not unreasonably encumber the premises with its materials.

SECTION 00150 - CONTROL OF WORK

00150.55 Cooperation with Other Contractors – Add the following subsection:

If any part of the Contractor’s work depends, for proper execution or results, upon the work of any other contractor, the Contractor shall inspect and promptly report to the Engineer any defects in the other work that render it unsuitable for proper execution and results. The Contractor’s failure to so inspect and report shall constitute an acceptance of the other contractor’s Work as fit and proper for the reception of its work, except as to defects that may develop in the other contractor’s work after execution of its work.

SECTION 00160 - SOURCE OF MATERIALS

00160.05 Qualified Products List (QPL) – ADD the following paragraph:

Products, materials, and equipment listed in the Technical Specifications, Special Provisions or Supplemental Specifications shall be provided in lieu of a similar product on the Qualified Products List. Where no specific product, material, or equipment is specified in the Special Provisions or Supplemental Specifications an item from the QPL may be furnished. Contractor shall submit to the Project Manager, a list of any product from the QPL proposed to be included in the work.

ODOT QPL List: https://www.oregon.gov/ODOT/Construction/Pages/Qualified- Products.aspx

SECTION 00165 - QUALITY OF MATERIALS

00165.00 General – Add the following:

After the sentence “Materials or manufactured…”

ATTACHMENT B

https://www.oregon.gov/ODOT/Construction/Pages/Qualified-Products.aspx https://www.oregon.gov/ODOT/Construction/Pages/Qualified-Products.aspx

All materials to be incorporated in the Work shall be subject to sampling, testing, and approval. Samples furnished by the Contractor shall be representative of the materials to be used. The Engineer may select samples or may require that samples be delivered to and tested as required by the Specifications at the laboratory of the Engineer’s choice, at no additional cost to the City.

• All sampling and testing of materials shall be done in accordance with the current designated standard methods of the American Association of State Highway and Transportation Officials (AASHTO), American Society for Testing and Materials (ASTM), etc., or in accordance with special methods designated in the Specifications.

• The Contractor shall furnish, without additional charges, the necessary test pieces and samples, including facilities and labor for obtaining the same, as requested by the Project Manager. When required, the Contractor shall furnish test certificates of materials and equipment made at the point of manufacture by a recognized testing laboratory.

• The Project Manager shall have access to the Work wherever it is in preparation or progress, and the Contractor shall provide facilities for the access, including maintenance of temporary and permanent access routes.

• If the Specifications, laws, ordinances, or public authority requires the Work to be tested or approved, the Contractor shall give the Project Manager timely notice of its readiness for inspection. If the inspection is by authority other than the Project Manager, the Project Manager shall be given timely notice of the date fixed for the inspection. Inspections by the Engineer will be promptly made and, where practicable, at the source of supply. If work should be covered without approval or consent of the Project Manager, it shall, if required by the Project Manager, be uncovered for examination at the Contractor’s expense.

• Re-examination of questioned work may be ordered by the Project Manager and, if so ordered, the work shall be uncovered by the Contractor. If the work is found not in accordance with the Contract Documents, the Contractor shall correct the defective work at no additional cost to the City.

• Observations by Project Manager, inspections, tests, or approvals by persons other than the Contractor shall not relieve the Contractor from the obligation to perform work in accordance with requirements of the Contract Documents.

SECTION 00180 - PROSECUTION AND PROGRESS

00180.30 Materials, Equipment, and Work Force – Add the following:

Above the paragraph starting with “The work force shall…” The Contractor shall always enforce strict discipline and good order among its employees.

The Contractor shall comply with all applicable labor rules, wage scales, and regulations, including nondiscriminatory laws, of the Government of the United States, the State, County, and City or Town in which the Work is performed.

00180.31 Required Materials, Equipment, and Methods – Delete (b) and (c) and replace with:

00180.31(b) Substitution and Or-Equal” Products - Whenever materials or equipment are specified or described in the Contract Documents by using the name of a particular manufacturer or supplier, the naming of the item is intended to establish the type, function, and quality required. If the name is followed by the words “or equal”, indicating that substitution is permitted, materials or equipment of alternate manufacturers or suppliers may be accepted by the Engineer if sufficient information is provided by the Contractor to allow the Engineer to determine that the material or equipment proposed is equivalent or equal to the named manufacturer’s material or equipment. The proposed substitutes or “or equal” submittal procedure also applies to Equipment Manufacturers/Suppliers originally listed by the Contractor in the Bid Proposal Attachment that are not named in the specifications. Submittals are subject to the following requirements:

• The burden of proof as to the type, function, and quality of any such substitute material or equipment shall be upon the Contractor.

• The Engineer shall be the sole judge as to the type, function, and quality of any such substitute material or equipment, and the Engineer’s decision shall be final.

• The Engineer may require the Contractor to furnish, at the Contractor’s sole expense, additional data about the proposed substitute.

• The Owner may require the Contractor to furnish, at the Contractor’s sole expense, a special five-year performance guarantee or other surety with respect to the substitute material or equipment.

Acceptance by the Engineer of a substitute item proposed by the Contractor shall not relieve the Contractor of the responsibility for full compliance with the Contract Documents and the adequacy of the substitute item. The Contractor shall be responsible for resultant changes and all additional costs which the accepted substitution requires in the Contractor’s work, the work of the Contractor’s Subcontractors, and all other Contractor’s; and the Contractor shall accomplish such changes without cost to the Owner or Engineer. Procedure for review by the Engineer will include the following:

• If the Contractor proposes to furnish or use a substitute item of material or equipment, the Contractor shall make written application to the Engineer on the “Substitution Request Form” included in these Supplementary Conditions for acceptance thereof.

• Unless otherwise provided by law or authorized in writing by the Engineer, the “Substitution Request Form” shall be submitted within the 35-day period after Award of the Contract.

• Whenever a proposed substitute material or equipment has not been submitted within the said 35-day period, or whatever submission of a proposed substitute material or equipment has been judged to be unacceptable by the Engineer, the Contractor shall provide the material or equipment named in the Contract Documents.

• The Contractor shall certify that the proposed substitute shall perform adequately the function and achieve the results called for by the general design, be similar and of equal substance to that specified, and be suited to the same use as that specified.

• The Engineer shall be allowed a reasonable time within which to evaluate each proposed substitute.

• As applicable, no shop drawing submittals shall be made for a substitute item, nor will any substitute item be ordered, installed, or used without the Engineer’s prior acceptance of the Contractor’s “Substitution Request Form” (00150.40(2)), which will be evidenced by a change order.

• The Contractor’s Application using the “Substitution Request Form” shall contain the following statements and/or information which shall be considered by the Engineer in evaluating the proposed substitution:

• The evaluation and acceptance of the proposed substitute shall not prejudice the Contractor’s achievement of substantial completion on time.

• Whether or not acceptance of the substitute for use in the work will require a change in any of the Contract Documents to adopt the design to the proposed substitute.

• Whether or not incorporation or use of the substitute item in connection with the work is subject to payment of any license fee or royalty

• All variations of the proposed substitute for that specified shall be identified.

Available maintenance, repair and replacement costs and services shall be included.

Itemized estimate of all costs that may result directly or indirectly from the acceptance of such substitute, including costs of redesign and claims from other Contractors affected by the resulting change.

Within 35 calendar days following the Contract Date, the Contractor shall furnish to the Engineer, a complete list of proposed substitutions together with shop drawings and/or such technical data as is defined in the Contract Documents, submittal procedures.

00180.41 Project Work Schedules – Add the following:

After the paragraph that begins “Contractor’s activity…” The Contractor shall submit a supplemental “complete look ahead” Project Work schedule each week to the Engineer. An exception to this provision may be given by the Engineer when projects are small or of a simple nature. The “look ahead” Project Work schedule is supplemental to the Type A, B, or C schedule specified below. The supplemental “look ahead” Project Work schedule shall:

• Identify the sequencing of activities and time required for prosecution of the Work

• Provide for orderly, timely, and efficient prosecution of the Work

• Contain sufficient detail to enable both the Contractor and the Engineer to plan, coordinate, analyze, document, and control their respective Contract responsibilities

The supplemental “complete look ahead” Project Work schedule shall be written in common terminology and show the planned work activities broken down into logical, separate activities by area, stage, and size, and shall include the following information:

• The resources the Contractor, Subcontractors, or services will use

• The locations of each activity that will be done, including the limits of the Work by mile posts, stations, or other indicators

• The time frames of each activity by Calendar Days, shifts, and hours

• All anticipated shoulder, lane, and road closures

At a minimum, the Contractor shall prepare a bar chart that:

• Shows at least three weeks of activity including the week the bar chart is issued

• Uses a largest time scale unit of one Calendar Day. Smaller time scale units may be used if needed.

• Is appropriate to the activities

• Identifies each Calendar Day by month and day

Include the Contract name, Contract number, Contractor’s name, and date of issue on each page of the bar chart.

The Contractor shall submit the supplemental “complete look ahead” Project Work schedule starting at First Notification and continuing each week until Second Notification has been issued and all punch list items, and final trimming and cleanup has been completed. The Contractor shall meet with the Engineer each week to review the supplemental “look ahead” Project Work schedule. If the Engineer or the Contractor determines that the current supplemental “look ahead” Project Work schedule requires changes or additions, either notations can be made on the current schedule or the Engineer may require the submittal of a revised supplemental “3-week look ahead” Project Work schedule. Review of the current and subsequent supplemental “look ahead” Project Work schedules does not relieve the Contractor of responsibility for timely and efficient execution of the Contract.

00180.42 Preconstruction Conference –Delete and replace the subsection with the following:

Before work is started and materials ordered, the Contractor shall meet and consult with the Engineer relative to materials, equipment, and all arrangements for prosecuting the Work. The Contractor shall commence the Work contemplated under these Contract Documents within 3 days after the City’s written notice to proceed unless otherwise notified by the Engineer and shall complete the Work within the time specified in the Agreement, it being expressly understood and agreed that the time of beginning, rate of progress, and time of completion of the Work are of the essence of this Agreement.

If Utility work is part of the Contract, Contractor shall contact representatives from the utility companies involved with this project. Contractor shall incorporate the utility’s work into the Contractor’s schedule prior to the preconstruction conference.

00180.85(b) Liquidated Damages - Delete and Replace with the following:

(b) It is agreed that the amount of additional expense and damage incurred by reason of failure to complete the Work shall be as given in the following schedule for each calendar day beyond the Completion Date.

Original Contract Amount Liquidated Damages

Up to $10,000 $500 $10,000 to $100,000 $1,000 $100,000 to $500,000 $1,500 Greater than $500,000 $2,000

These amounts are agreed upon as liquidated damages for the loss to the City on account of expense due to the employment of Engineers, Inspectors, and other employees after the expiration of the time of completion, and on account of the value of the operation of the Work dependent thereon. It is expressly understood and agreed that this amount is not to be considered in the nature of a penalty, but as liquidated damages that have accrued against the Contractor; and the City is authorized to deduct the amount of the damages from any monies due the Contractor for work performed or material furnished under this Agreement; and the Contractor and its Sureties shall be liable for any excess.

(Note: The minimum liquidated damages will be all the City’s incurred costs for administration and inspection beyond the approved completion date.)

SECTION 00195 - PAYMENT

00195.10 Payment for Changes in Materials Costs - Delete and Replace with following:

No material price escalation/de-escalation is allowed on City projects unless specifically identified and defined in the Contract. All OSS clauses relating to this matter are not applicable on City projects.

00195.20(a) Insignificant Changed Work – Delete and Replace with the following:

(a) Change Orders - Payment or credit for any alterations covered by a Change Order shall be determined by one or a combination of methods below:

• Unit Prices - If applicable, the unit prices stated in the Proposal or unit prices negotiated and mutually acceptable to the Contractor and City.

• Lump Sum - A total sum for the Work negotiated and mutually acceptable to the Contractor and City.

The Contractor’s quotations for Change Orders shall be in writing and firm for a period of 45 days. Any compensation agreed upon, and subsequently paid by the City for work defined in a Change Order, shall be deemed to include all costs and expenses related to the work, including the costs and expenses to a direct, indirect, and consequential nature, or otherwise, and it is specifically understood and agreed that no additional compensation may be subsequently sought or charged by the Contractor for the work covered by the applicable Change Order.

The City’s request for quotations on alterations to the work shall not be considered authorization to proceed with the work prior to the issuance of a formal Change Order, nor shall the request justify any delay in existing work.

00195.50 Progress Payments and Retained Amounts - Add the following at the beginning of the section:

Within 10 days after the effective date of the Contract, Contractor shall submit to Engineer for timely review a preliminary Schedule of Values for all the Work which includes quantities and prices of items which when added together equal the Contract Price and subdivides the Work into component parts in sufficient detail to serve as the basis for progress payments during performance of the Work. Such prices will include an appropriate amount of overhead and profit applicable to each item of Work.

The Contractor’s Schedule of Values will be acceptable to Engineer as to form and substance if it provides a reasonable allocation of the Contract Price to component parts of the Work. An unbalanced, incomplete, or otherwise unacceptable schedule of values shall not be approved as a basis of payment.

incorporated into a form of Application for Payment acceptable to the Engineer. Progress payments on account of Unit Price Work will be based on the number of units completed.

In consideration of the faithful performance of all the covenants, stipulations, and conditions in these Contract Documents, the Owner covenants and agrees to pay the Contactor for the Work actually performed as determined by the final estimate of the Engineer, together with any amounts due for extra work not classified under the items listed in the Contractor’s Proposal as provided in the paragraph “Extra Work” of these General Conditions; less any deduction for failure to complete the Work within the time specified; and less any deductions for claims and damages paid by the Owner due to acts or omissions of the Contractor and for which Contactor is liable under the Contract.”

00195.50(b) Retainage - Delete in first paragraph starting with: “The Amount to be retained…” with the following:

The amount to be retained from progress payments shall be 5% of the value of the Work accomplished.

00195.50(c) Forms of Retainage – Delete in its entirety.

00195.80 Allowance for Materials Left on Hand – Delete and Replace section with the following:

00195.80 Materials delivered to the work site but not used - Final payment will be made only for materials incorporated in the work. Upon acceptance of the work, all materials stored on the site, unless otherwise agreed upon in writing, shall revert to the Contractor.

00195.89 Release of Liens – Add the following subsection:

Except for payments to Subcontractors, neither the final payment nor any part of the retained percentage shall become due until the Contractor submits to the City a signed affidavit, satisfactory to the City, stating that so far as the Contractor has knowledge or information, all accounts for materials, labor, and incidentals in connection with the Work have been paid in full.

00195.90 Final Payment – Delete and Replace with the following:

To receive final payment, the Contractor must do the following:

1. Notify the Engineer, in writing, that the Work has been completed in accordance with the Contract Documents and request final payment.

2. Submit to the City appropriate waivers of lien for itself and all Subcontractors.

3. Furnish to the City a completed wage certification as required by ORS 279, as amended.

Within 15 days of these documents, the Engineer shall conduct a final inspection of the Work. If the Work, including all required inspection by City and other government agencies, and documentation has been completed to the satisfaction of the Engineer, the City shall accept the Work and make final payment to Contractor within 30 days of the final inspection.

00195.92 Acceptance of Final Payment Constitutes Release – Add the following subsection:

The acceptance by the Contractor of the final payment shall release the City and the Engineer as agent of the City from all claims and all liability to the Contractor for all things done or furnished in connection with the Work, and every act of the City and others relating to or arising out of the Work. No payment, however, final or otherwise, shall operate to release the Contractor from obligations under these Contract Documents, including obligations to repair or compensate City for work later determined to be defective.

00195.93 No Waiver of Rights – Add the following subsection:

Neither the inspection by the City, through the Engineer or any of its employees, nor any payment for or acceptance of any part of the Work by the City Engineer, nor any extension of time, nor any possession taken by the City, shall operate as a waiver of any provision of these Contract Documents, or any power reserved to the City, or any right to damages.

A waiver of any breach of this Agreement is not a waiver of any other or subsequent breach.

SECTION 00220 – ACCOMMODATIONS FOR PUBLIC TRAFFIC

00220.03 Work Zone Notifications - Delete and Replace the sentence that begins with “Provide the following work…” with the following:

Provide the following work zone notifications for any Contractor-implemented traffic restrictions or closures:

SECTION 0225 - WORK ZONE TRAFFIC CONTROL

00225.02 General Requirements – Add the following to the end of this subsection:

Be responsible for notifying all abutting property owners along the streets according to the approved schedule, or an approved revision of the schedule, notification shall include flyers or door hangers posted at each address seven days before work starting, and minimum of 48 hours prior to the specific work on type II barricades restricting parking access on the appropriate dates and times according to the approved schedule.

00225.43(I) Pavement Marking Removal Pavement Marking Removal - Remove striping, durable markings, legends, and bars according to the following:

• Coordinate all removal Work with construction activities.

• Remove pavement markings on Pavement Base Courses when a change in striping is necessary and when the Pavement will not be covered with an additional Base Course.

• Remove striping and pavement markers on the wearing Course so that the permanent markings can be applied. Remove all remaining striping and pavement markers from the wearing Course after the permanent markings have been applied, as directed.

• Use vacuum shrouded Equipment or other equally effective containment procedures to contain and collect all removed pavement marking materials and spent abrasive and dispose of according to 00290.20.

• Remove legends so that the legend outline is not recognizable on the Pavement surface.

• Unless otherwise approved, remove pavement markings during the same day the traffic shift is accomplished, or new pavement markings are applied.

• Do not use paint or asphalt to cover existing stripes.

• Do not remove more than 1/8 inch of Pavement during pavement marking removal.

• Do not use grinding to remove stripes, durable markings, legends, or bars from the wearing Course or existing surfaces, unless the area will be paved over, obliterated, or the pavement markings will be replaced to match the original striping configuration.

Repair all damage resulting from pavement marking removal to the Engineer's satisfaction at no additional cost to the Agency.

00225.80 Measurement – Delete and Replace with the following:

Work covered under this Section will be measured according to the following:

Method “B” – Lump Sum Basis – Under this method, no measurement of quantities will be made. A lone exception will be made for the Portable Changeable Message Signs, which will be measured on the unit basis when needed.

0225.88(a) Flaggers - Add the following:

After the sentence that begins with “Flaggers will be…” Flagger not approved by the Project Manager or included on the approved traffic control plan and schedule will not be measured for payment.

00225.90 Payment – Delete this subsection and replace with the following:

Work zone traffic control will be paid for according to the following:

Method “B” – Lump Sum Basis – Work zone traffic control will be paid for at the Contract lump sum amount for the items “Temporary Work Zone Traffic Control, Complete”, and “Public Notification Outreach.”

Payment for Temporary Traffic Control will be payment in full for furnishing, installing, moving, operating, maintaining, inspecting, and removing materials and TCD, and for furnishing all equipment, labor, and incidentals necessary to complete the work as specified. Payment for Public Notification Outreach will be payment in full for notifying adjacent property owners as the work progresses through the streets included in this program. PCMS Variable Message Boards will be paid for at the Contract unit price per each when needed.

00225.90(a-2) Temporary Protection and Direction of Traffic - Add the following bullet to this subsection:

• Preparing and signing the daily "Traffic Control Inspection Report".

00225.90(b) Temporary Protection and Direction of Traffic – Add the following bullet to this subsection:

• Furnishing and placing detour signs required when any roads are closed as a result of the construction.

00225.97 Flaggers and Flagger Station Lighting - Add the following:

After the paragraph that begins with “Flaggers performing work other….”:

Payment will not be made for Flaggers not included in the approved Traffic Control Plan and Schedule or approved by the Project Manager.

SECTION 00340 - WATERING

00340.10 Water - Add the following to the end of the subsection:

For a charge, the city can provide water to the Contractor from a fire hydrant or similar source. The Contractor must make an application for permit to the city for such service.

SECTION 00706 - EMULSIFIED ASPHALT SLURRY SEAL SURFACING

Description

00706.00 Scope - Delete and Replace with the following:

SLURRY SEAL SPECIFICATIONS – (Polymer Modified) DESCRIPTION: The Contractor shall furnish all labor, equipment, material, supplies, signage, traffic control, and other incidentals necessary to provide a Slurry Seal. Slurry Seal shall consist of a mixture of an approved Polymer Modified emulsified asphalt, mineral aggregate, water, and specified additives, proportioned, mixed and uniformly spread over a properly prepared asphalt surface. The completed Slurry Seal shall leave a homogeneous mat, adhere firmly to the prepared surface, and have a skid-resistant surface texture throughout its service life.

Materials

00706.10 - Delete and Replace with the following:

Asphalt Emulsion -The polymer-modified emulsion asphalt for slurry seal shall be a Quick Setting type CQS-I HP (Polymer Modified, Cationic Quick Set) the specification for Slurry Emulsion is in accordance with the material properties and test methods as specified by ISSA and AASHTO.

Polymer may separate from the emulsion due to the differences in density. If separation occurs, the latex must be remixed into the emulsion by circulation in the tanker before the modified emulsion is transferred to the slurry machine for application.

TEST ON EMULSION TEST METHOD TEST METHOD SPECIFICATION

Settlement & Storage Stability, 24-Hour. AASHTO T 59 ASTM D 6930 1% Maximum Residual Asphalt Recovery – Option #1 Distillation of Polymer-Modified Emulsified Asphalt

AASHTO T 59 ASTM D 6697 62% Maximum

Residual Asphalt Recovery – Option #2 Residue by Evaporation of Polymer- Modified Emulsified Asphalt

AASHTO T 59 ASTM D 6934 62% Maximum

TEST ON RESIDUE TEST METHOD TEST METHOD SPECIFICATION

Softening Point of Bitumen (Ring & Ball)

AASHTO T 53 ASTM D 36 135*F (57*C)

Minimum

Penetration of Bituminous Materials at 77*F (25*F)

AASHTO T 49 ASTM D 5 40-90

00706.11- Delete and Replace with the following:

Polymer Modified Emulsion – Furnish CQS-1hp Polymer modified emulsion. The polymer modifier shall be either a solid synthetic rubber or polymer material. Combine the polymer modifier with the base asphalt or asphalt emulsion, prior to loading at the manufacturing plant, at the minimum rate of 2.5 to 3 percent polymer solids by weight of asphalt. The polymer modified emulsion shall be compatible with the mix design developed for the conventional slurry seal. Each shipment of emulsified asphalt shall be accompanied by a certificate of analysis or certificate of compliance from the manufacturer.

Asphalt Storage - Any emulsified asphalt storage used by the Contractor shall be suitable with the storage container constructed so as to prevent water from entering the asphalt. An acceptable heating system shall be provided if necessary, to prevent the emulsified asphalt from freezing, but the asphalt shall not be heated to a temperature greater than 130 F.

00706.12 - Delete and Replace with the following:

Aggregate -The mineral aggregate used shall be manufactured crushed stone such as granite, slag, limestone, chat, or other high-quality aggregate, or combination thereof. To assure the material is totally crushed, 100 percent of the parent aggregate will be larger than the largest stone in the gradation to be used. The aggregate shall meet the following test requirements: The finished product shall be clean, uniform in quality and free from wood, bark, roots and other deleterious materials. It may be necessary during stockpiling to add blending sand or filler to improve the grading of the mineral aggregate. For this purpose, only, crushed fines from the aggregate source may be used but only in the minimum amount needed for optimum mix design and workability. When tested in accordance with ASTM Designation D2419, the total aggregate blend shall have a sand equivalent of not less than 65. The aggregate shall consist of 100% crushed rock. The combined mineral aggregate including blending sand and fillers, but not Portland cement, shall conform to the following grading limits.

Gradation Table – Aggregate (percent passing) (a) (b)

Sieve Size TYPE II TYPE III Tolerance 3/8" 100 100 + or – 5% No. 4 90-100 70 – 90 + or – 5% No. 8 65-90 45 – 70 + or – 5% No. 16 45-70 28 – 50 + or – 5% No. 30 30-50 19 – 34 + or – 5% No. 50 18-30 12 – 25 + or – 4% No. 100 10-21 7 – 18 + or – 3%

No. 200 5-15 5 - 15 + or – 2%

Test AASHTO ASTM Specification Sand Equivalent Value of Soils and Fine Aggregate

T 176 D

60 Minimum

Soundness of Aggregates by Use of Sodium Sulfate of Magnesium Sulfate

T 104 C 88 15% Maximum w/NA2SO4 25% Maximum w/MgSO4

Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine

T 96 C 131 30% Maximum

(a) Meets ISSA gradation

(b) If oversize material is present, screening through a correct size screen will be required prior to delivery to the slurry machine. If clay balls are present, the aggregate may not be used.

• Resistance to Degradation (ASTM C131grading D) 20% maximum loss

• Soundness of Aggregate (ASTM C88) 15% maximum loss

• Sand Equivalent (ASTM D 2419) 60% minimum

• LA Abrasion (AASHTO T96) 20% maximum loss

Stockpiling of Aggregate - Precautions shall be taken to ensure that a stockpile does not become contaminated with oversized rock, clay or silt or collect excessive amounts of moisture. The stockpiles shall be placed on hard surfaces (Asphalt and Or Concrete surface) and in an area that drains readily. Segregation of the aggregate will not be permitted. The stockpile and staging area should be as close as possible to Job location.

00706.13 - Delete and Replace with the following:

Additives and Mineral Filler - Any material added to the slurry mixture or any of the component materials shall be approved by the Project Manager prior to use, and the Contractor shall furnish a statement describing the additive, its purpose and quantity to be used.

The quantities of additives shall be initially predetermined by the mix design and field adjustments, if required, shall be approved by the Project Manager. Liquid retardant (used with the Quick Set Emulsion) shall only be used if needed to improve workability of the mix.

Mineral filler, for example, Portland cement, hydrated lime, limestone dust, fly-ash or other approved filler, if required by the mix design, shall meet the requirements of ASTM D242.

The type and amount, if necessary, shall be determined by the mix design, and shall be considered the dry aggregate.

00706.14 - Delete and Replace with the following:

Water - All water used with the slurry mixture shall be potable. The Contractor shall ensure that the water planned for use shall be compatible with the slurry mix. If the contractor elects to obtain water from fire hydrants, the contractor shall obtain, install and use an approved construction water meter and pay such fees and service charges as are normally charged by the water department.

706.15 – Delete and Replace with the following:

Mix Design - A minimum of 10 calendar days prior to accomplishing any slurry sealing, the Contractor shall submit a signed original of a mix design for approval by the Project Manager. The mix design shall be developed using the specific materials for this project.

Previous mix designs shall not be accepted unless authorized by the Project Manager.

Once the materials are approved, no substitution will be permitted unless first tested and approved by the laboratory preparing the mix design.

The design shall be performed in accordance with International Slurry Surfacing Association (ISSA) Technical Bulletin No. 111 "Outline Guide Procedure for Slurry Seal".

The mix design shall be developed such that the treated area will be opened to traffic within 2 to 3 hours after placement of the slurry seal mixture.

The following laboratories are pre-approved for performing the mix design:

Petroleum Sciences North 4817 Freya #3 (UPS) P.O. Box 6304 Spokane, WA 99207 Contact: Bob Dunning - (509) 489-1758

Akzo Nobel Chemicals Inc. Asphalt Applications 7101 Adams Street, Willowbrook, Illinois 60521 Contact: Tony Ng - (630) 288-2922

Other laboratories may be approved by the Project Manager if they have the capability to perform the required tests and demonstrate satisfactory experience performing slurry seal mix designs.

As a minimum, the mix design report shall include the following information:

Aggregates: Results of Quality tests (Los Angeles Wear, Sand Equivalent, etc.)

Gradation

Asphalt: Results of Specification tests Residual Asphalt % by Weight of Dry Aggregate (7.5-13.5 Type II)

Water: Percentage by weight of dry aggregate (Report design quantity and minimum and maximum limits)

Mineral Filler (if necessary): Type to be used

Percentage by weight of dry aggregate (Report design quantity and minimum and maximum limits)

Additives (if necessary): Type to be used

Percentage by weight of dry aggregate (Report design quantity and minimum and maximum limits)

Results of Tests on Slurry Seal Mixtures:

ISSA Test No. Description Specification ISSA TB 106 Slurry Seal Consistency 2-3 cm

ISSA TB 139 @

77 degrees F.

Wet Cohesion 30 Minutes Min (Set)

Wet Cohesion 60 Minutes Min

≥12 kg-cm

≥20 kg-cm (or near spin)

ISSA TB 109 Excess Asphalt by LWT Sand Adhesion

≤50 g/sq. ft.

ISSA TB 114 Wet Stripping Pass (≥90%) ISSA TB 100 Wet-Track Abrasion loss, 1-hour Soak

Wet-Track Abrasion loss, 6-hour Soak

≤75 grams/ sq.

ft.(Report for Information Only)

ISSA TB 113 Mix Time* Controllable to 180 Seconds Minimum

*The mixing test and set time test should be done at the highest temperatures expected during construction.

The laboratory report shall include the quantitative effects of moisture content on the unit weight of the aggregate. In addition to the laboratory report, abraded and unabraded slurry test samples shall be submitted by the contractor from the Wet Track Abrasion Test.

00706.16 - Delete and Replace with the following:

Tolerances and Limits Composition of Slurry Mixture - The amount of emulsified asphalt to be blended with the aggregate shall be that as recommended by a laboratory analysis and subject to final adjustment in the field on the basis of a test section on a nearby surface off the pavement to be covered. The minimum amount of water shall be added as necessary to obtain a fluid and homogeneous mixture.

The mixture supplied to the project shall be within the following tolerances, after the design mix has been established:

Passing U.S. No. 4 and larger sieves

+/- 7% (1)

Passing U.S. No. 8 to U.S.

No. 100 Sieve

+/- 4% (1)

Passing U.S. No. 200 +/- 4% (2) Residual Asphalt by extraction +/- 0.6% (2) Mineral Filler +/- 1.0% (3)

1. The aggregate gradation shall always fall within the broadband specifications for Type III slurry.

2. The Project Manager may adjust the asphalt emulsion during construction to account for the amount of asphalt absorbed by the pavement.

3. This allowable variation is subject to the reported minimum and maximum values in the mix design.

Refer to the "Mix Design" section regarding substitution of materials.

00706.17 Quality Control - Be responsible for quality control as required by Section 00165. Perform quality control sampling and testing as follows:

(a) QC/QA Slurry Seal Program - Test gradation, mixture, moisture, and asphalt according to the MFTP.

(b) Slurry Seal Production (Gradation):

• Stockpile - Every 35,000 square yards.

• Tanker - Every 35,000 square yards.

• Mixture - To be taken directly out of pug mill every 35,000 square yards.

(c) Verification Testing - If comparisons of test results are outside the allowable differences, the Contractor and Project Manager will investigate the reason. The Project Manager may stop production while the investigation is in progress if the potential for pavement failure is present. The investigation may include review of calculation, testing of the remaining samples, review and observation of Contractor testing procedures and equipment, and a comparison of sample test results.

Equipment

00706.20 Equipment - Delete and Replace with the following:

00706.22 Spreading Equipment - Spreader Box - Attach to the mixer machine a mechanical type squeegee distributor equipped with Power Auger and flexible material that is in contact with the pavement surface to prevent the loss of slurry from the distributor. Adjust the distributor to prevent the loss of slurry on varying grades and crown and to assure uniform spread. There shall be a steering device and a flexible strike-off.

The spreader box shall have an adjustable width. Keep the spreader box reasonably clean, and do not allow buildups of asphalt and aggregate. Only one tail rubber will be allowed. Any type of drag used shall be subject to approval by the Project Manager and kept in a completely flexible condition at all times.

00706.23 Rollers - If required by Special Provision, rollers shall be self-propelled pneumatic-tired type and be equipped with a water spray system. Pneumatic-tired rollers shall be capable of exerting a ground pressure of not less than 80 pounds per square inch of tire contact area.

Auxiliary Equipment - Hand squeegees, hand drags, shovels, an asphalt distributor and other equipment shall be provided as necessary to perform the work. Containers shall be required for disposal of waste slurry.

Construction

00706.40 Delete and Replace with the following:

Weather Limitations - Slurry may be applied when the pavement and air temperature is above 45 degrees F. and rising. The mixture shall not be applied when weather conditions prolong opening to traffic beyond a reasonable time (2-3 hours). The Contractor will use his judgment in deciding whether to place slurry in the event of overnight freezing temperatures or rain is forecast. Any slurry damaged by freezing or rainfall shall be corrected by the Contractor.

00706.41 Delete and Replace with the following:

Preparation of Surface – Immediately prior to applying the slurry, the surface shall be cleaned thoroughly of all loose material, silt spots, vegetation, and other objectionable matter. If slurry is being placed over a chip seal as part of a cape seal, excess aggregate from the chip seal operation shall be removed prior to placement of the slurry seal. A vacuum sweeper unit shall be used for all street cleaning. Kick brooms will not be allowed for final, pre-treatment sweeping. A hand-held blower-type unit shall be allowed at the discretion of the Project Manager. Dust shall be controlled during street cleaning by sprinkling the surface with water (if necessary) as directed by the Project Manager. The contractor may (at his option and expense) use a high-pressure water flusher truck to clean curbed streets only. Such flushing shall be done sufficiently in advance of the slurry sealing to allow for adequate drying of the street. Water flushing will not be permitted in areas where extensive cracking exists in the pavement surface. The Project Manager shall give the final approval of the surface.

The Contractor shall, as a part of placement of the slurry upon the roadway, protect driveways, curb-face, cover catch basins, inlets, manhole lids, utility valve boxes, and survey monument boxes. All of the items will be free of slurry and available for easy access. The method of protection shall be approved by the Project Manager prior to installation. The protective coverings shall be removed within 24 hours after the slurry has cured. All costs incurred by the Contractor in necessary protective measures shall be included in the unit Contract prices for the various Bid items of Work involved.

If the slurry is to be placed over a brick or Portland cement concrete surface, a highly absorbent asphalt surface, or over an asphalt surface where the exposed aggregate has become polished and slick, a tack coat of emulsified asphalt of the same type and grade specified for the slurry and diluted with water (one part water to one part asphalt by volume) shall be applied. The tack coat shall be applied with an asphalt distributor with the normal application rate being from 0.05 to 0.10 gallons per square yard of diluted emulsion. The Project Manager shall give final approval to the rate of application.

All existing lane markers and traffic buttons within the areas to be sealed shall be removed and disposed in a manner acceptable to the Project Manager.

The agencies or their designee will perform all deep patching, leveling and adjustment of utilities in advance of the slurry operation.

00706.43 Delete and Replace with the following:

Application of Slurry Mixture: Pre-wetting immediately in advance of the slurry application shall only be done if the street is dry. Pre-wetting with a water fog spray shall be allowed only at the direction of the Project Manager. The contractor shall take precautions so that there is no free water on the street when the slurry is placed.

The slurry mixture shall be placed upon the damp surface and shall have a thick, creamy consistency and shall be relatively free flowing. Once the proper consistency is obtained, changes in proportioning of various component materials of the mixtures shall be held to a minimum.

The slurry mixture shall be spread to fill cracks and minor depressions and will have a uniform non-skid surface. The slurry shall be placed with a spreader box except in these inaccessible areas of hand spreading to give the same texture as the machine spread surface.

The total time of mixing in the mixer-blender shall not exceed four minutes a sufficient amount of slurry seal shall be carried in all parts of the spreader at all times so that complete coverage is obtained. No lumping, balling, or unmixed aggregate shall be permitted. No segregation of the emulsion and aggregate fines from the coarse aggregate will be permitted.

If oversized aggregate or foreign matter appears in the slurry mixture, slurry placement shall be discontinued and the aggregate re-screened to remove these materials. Streaks such as those caused by oversized aggregate shall be corrected and not left in the finished slurry surface. Excessive breaking of the emulsified asphalt in the spreader box will not be allowed and adjustments in the amount of setting agent shall be made to correct this problem.

Neither excessive build-up nor unsightly appearance shall be permitted on longitudinal or transverse joints. All transverse joints shall be squared off and the slurry mix removed and disposed in a container suitable to the Project Manager or placed outside the pavement surface for removal prior to project completion. The Contractor shall use building paper at each transverse joint to avoid sags or ridges on the previous application of slurry. The Contractor may employ an alternate method to achieve smooth joint construction subject to approval of the Project Manager. In general, longitudinal or transverse joints shall be made with the slurry substantially cured, or fresh and still workable.

On steep grades, those in excess of eight percent, the slurry seal shall be placed uphill unless otherwise authorized by the Project Manager. Pneumatic rubber-tired roller shall be required for rolling of the slurry mixture on seams, overlaps and intersections to reduce ridges and humps.

Any tree branches or foliage which will hinder the proper placement of the slurry seal shall be removed by the contracting agencies or their designee.

The contractor shall take precautions to eliminate the possibility of damage to the uncured slurry. However, if damage should occur, it shall be repaired by the Contractor at his expense. All repairs shall be full width repairs done with a spreader box and shall be uniform and geometrically applied.

The completed surface shall be free of gaps, ridges, depressions, or other irregularities caused by the application of the slurry seal.

Application Rate - The slurry…