4.10 Additional Drawings by City - Contract drawings are intended to be comprehensive and to indicate in detail the scope of the work. However, the Engineer may furnish the contractor additional drawings during the progress of the work in order to clarify and define in greater detail the intent of the contract drawings or specifications. Contractor may request such detailed drawings by submitting his/her request in writing to the Engineer at least two (2) weeks in advance of the time they are required.
4.11 Li nes and Grades - All work under this contract shall be constructed to the lines, grades and elevations shown on the contract drawings. Contractor shall establish the lines, grades and elevations unless it is otherwise specified in the Special Provisions.
4.12 Record Documents – The Contractor shall keep at the worksite a record copy of all Drawings, Specifications, Addenda, Written Amendments, Change Orders, Work Directives, Field Orders and written interpretations and clarifications. These record documents together with all approved submittals, samples and shop drawings will be available to the Engineer as a reference at all times. Upon completion of the work, these record documents will be delivered to Engineer.
4.13 Record Drawings –The Contractor shall prepare and update a master “as-built” set of red ink-lined plans, to be reviewed and approved by the Engineer at the end of every month. Drawings shall contain information showing where actual installation differs from that shown on the original drawings, where underground or concealed features are found noting alignment (to 0.25’) and elevation (to 0.1’ ), field changes or deletions of work, and any additional work by change order. Upon the project’s completion, and prior to the project’s acceptance, the Contractor shall submit to the City the completed as -built record Drawings on one (1) set of full size prints prepared on 22" x 34" paper.
Record Drawings are full size drawings (Plans) which marked up during construction to delineate
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the actual in- place constructed conditions. Record Drawings shall be provided by the Contractor for this Project. Requirements for Record Drawings as specified elsewhere shall supplement the requirements specified herein.
4.14 Reuse of Documents - Neither the Contractor nor any Subcontractor or supplier or other person or organization performing or furnishing any of the work under a direct or indirect agreement with the City shall have any title or rights to any of the Drawings, Specifications or other documents (or copies thereof) which bear the seal of the design engineer. Such documents shall not be reused on extensions of the project or for any other project without written consent of the City and the design engineer.
4.15 Subsurface Data – If completed, all soil and soil test data, water table elevations, and soil analyses included or referred to in the Contract Documents apply only at the location of the test holes and to the depths indicated. If completed, soil test reports for test holes which have been drilled are available for inspection at the office of the Engineer. Any additional subsurface exploration shall be done by Bidders or the Contractor at their own expense.
The elevation of the water table indicated by soil test reports is that which existed on the date the test hole was drilled. It is the Contractor’s responsibility to determine and allow for the possibility of differing ground water elevations on the date of the project’s construction. A difference in elevation between ground water shown in soil boring logs and ground water actually encountered during construction will not be considered as a basis for extra work.
4.16 Right-of-Way – Acquisition of right -of-way or permanent easements necessary for the improvements as shown on the plans will be provided by the City. Unless otherwise provided, the Contractor shall make his/her own arrangements, pay for, and assume all responsibility for acquiring, using, and disposing of additional work areas, easements, and temporary facilities required. Contractor shall identify and hold the City harmless from all claims for damages resulting from such actions.
4.17 Removal of Defective and Unauthorized Work - Should the Contractor deliberately proceed with any portion or phase of construction which is obviously incorrectly indicated in the contract plans or documents, he or she shall be responsible for any corrective measures required to make adequate repairs or adjustment. This shall include any work done beyond the lines and grades shown on the plans or established by the Engineer, or any extra work done without written authority.
All work that has been rejected shall be remedied or removed and replaced by the Contractor in an acceptable manner and no compensation will be allowed for such removal or replacement. If the Contractor fails to remedy rejected work within ten (10) working days after written demand, the City may, without prejudice to other remedies, sell such materials at auction or at private sale, or otherwise dispose of such material. The Contractor shall be entitled to the proceeds of such sale, if any, in excess of the costs and damages for which the Contractor is liable to the City, including reasonable attorneys’ fees and expenses and compensation for the City’s services and expenses.
4.18 Acceptance of Defective Work - The City shall have the option, at its sole discretion and by written notice to the Contractor, to accept defective work instead of requiring its removal or correction, in which case the contract sum shall be reduced by an amount equal to the difference between the value to the City such work would have were it complete, correct, and in conformity with the Contract Documents and the value to the City of such defective work. Such option shall be exercised solely by written notice to the Contractor and shall not be implied from any act or omission by the City or the Engineer. If the remaining payments and retention are insufficient to cover the amount of the reduction of the contract sum, the Contractor shall promptly pay to the City the amount of any such deficiency.
4.19 Submittals - Within ten (10) working days following the Notice to Proceed, the Contractor shall provide a detailed list for review and approval of all individual submittals required to be submitted under the contract. The list shall reference the specification section and paragraph that requires the submittal along with the date the Contractor plans to transmit the submittal to the City for review.
Unless otherwise requested by the Engineer, submittals shall be provided electronically in .pdf format at least twenty -eight ( 28) calendar days prior to the approval being necessary for the work.
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Submittals shall be transmitted with a Submittal Cover Letter form as approved by the Engineer. Large submittals consisting of reports, oversized or colored pages, full sized shop drawings, manuals contained in binders, or submittals in other forms not easily reproduced shall be provided in hard copy format with six (6) copies.
For items requiring shop drawings, no materials shall be furnished, and no work shall be performed, until the drawings have been favorably reviewed. Shop drawings shall be of a size and scale to clearly show all necessary details.
After review by the City of each of the Contractor's submittals, the material will be returned to the Contractor marked with actions defined as follows:
(a) NO EXCEPTIONS TAKEN - Accepted subject to its compatibility with future submissions and additional partial submissions for portions of the work not covered in this submission.
Does not constitute acceptance of deletion of specified or required items not shown in a partial submission.
(b) MAKE CORRECTIONS NOTED - The same as item (a), except that minor corrections as noted by the City shall be made by the Contractor. No resubmission is required. (c) REVISE AND RESUBMIT - Rejected because of major inconsistencies or errors which shall be resolved or corrected by the Contractor prior to subsequent review by the City. (d) REJECTED - Submitted material does not conform to plans and Specifications in major respects. This material is not expected to be resubmitted. (e) SUBMIT SPECIFIED ITEM - Submittals not reviewed by the City but received for record purposes.
Favorable review of the shop drawings by the Engineer is interpreted to mean that there is substantial and acceptable conformance with the contract plans, but details of design may not necessarily be checked for adequacy or accuracy. Such acceptance shall not relieve the Contractor from the responsibility for errors or omissions in the shop drawings or from deviations from the contract documents unless such errors, omissions, or deviations were specifically called to the attention of the Engineer in writing. The Contractor shall be responsible for the correctness of the shop drawings, for shop fits and field corrections, and for the results obtained by the use of such plans.
4.20 Substitutions – Proposed requests by the Contractor for changes in products, materials , equipment, and methods of construction required under the Contract Documents after the award of contract are considered "requests for substitutions.” For proposed “or equal” substitutions, attention is directed to General Provision Section 6.03, “Trade Names or Equals.”
Each request for substitution shall be prepared and presented to the City in accordance with the procedures for submittals, except that the following additional information shall be provided.
(a) An explanation of the advantages to the City for accepting the substitution. (b) A comparison of significant qualities of the proposed substitution with those specified. (c) A list of changes or modifications needed to other parts of the work and to construction performed by the City and separate Contractors, that will be necessary to accommodate the proposed substitution.
(d) A statement indicating the substitution's effect on the Construction Schedule compared to the Baseline Construction Schedule without acceptance of the substitution. Indicate the effect of the proposed substitution on overall contract time. (e) Cost information, including a proposal of the net change, if any, in the Contract Sum. (f) Certification that the substitution is equal to or better in every respect to that required by Contract Documents, and that it will perform adequately in application indicated. Include Contractor's waiver of rights to additional payment or time extensions, that may be necessary because of the substitution's failure to perform adequately.
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No extension of time will be allowed through failure of the Contractor to either transmit requests for substitution sufficiently in advance of the work, or on account of processing time outside the time limits noted.
4.21 Construction Staking Lines and Grades - Unless otherwise stated in the Special Provisions, the Contractor shall provide, preserve, and replace if necessary, all of the necessary construction stakes required for the construction of the project. Grades for underground conduits will be set on the ground surface and shall then be transferred to the bottom of the trench by the Contractor.
Stakes or marks will be set by a California Licensed Surveyor or a California Registered Civil Engineer to establish the lines and grades required for the completion of the work as specified in the Contract Documents. It shall be the Contractor's responsibility to notify the Engineer of any discrepancies found between field grades and notes shown within the Contract Documents.
Contractor shall furnish horizontal control and cut sheets to the Engineer immediately upon the setting of construction or boundary markers. Upon completion, all work shall conform to the lines, elevations, and grades shown on the plans.
4.22 Inspection of the Work - All work is subject to inspection and approval of the Engineer.
Unless otherwise stated in the specifications, the City shall perform all required inspections. The Contractor shall notify the Engineer before noon of the working day before inspection is required. Unless otherwise authorized, work shall be done only in the presence of the Engineer. Any work done without proper inspection will be subject to rejection. The Engineer shall at all times have access to the work during its construction at shops and yards as well as the project site. The Contractor shall provide every reasonable facility for ascertaining that the materials and workmanship are in accordance with the Contract Documents. Inspection of the work shall not relieve the Contractor of the obligation to fulfill all conditions of the contract.
If a portion of the work is covered contrary to the Engineer’s request or direction, or contrary to the requirements of the Contract Documents, it must, if required in writing by the Engineer, be uncovered for the Engineer’s observation and be replaced at Contractor’s expense without adjustment of the contract time or the contract sum.
If a portion of the work has been covered, which is not required by the Contract Documents to be observed or inspected prior to it’s being covered and which the Engineer has not specifically requested to observe prior to it’s being covered, the Engineer may request to see such work and it shall be uncovered and replaced by Contractor. If such work is in accordance with the Contract Documents, the costs of uncovering and replacing the work shall be added to the contract sum by change order; and if the uncovering and replacing of the work extends the contract time, an appropriate adjustment of the contract time shall be made by change order. If such work is not in accordance with the Contract Documents, the Contractor shall pay such costs and shall not be entitled to an adjustment of the contract time or the contract sum.
Regular working hours for City Construction Inspectors are between 7:30 a.m. and 4:0 0 p.m., Monday through Friday, excluding City holidays. If the Contractor works outside these times, the Contractor may be charged for additional inspection. Inspection by the Engineer or by a City inspector, or any order measurement, approved modifications, certificate or payment of money, or acceptance of any part of whole of the work, or any extension of time, or any possession by the City or its agents, shall not operate as a waiver for any provision of this contract or of any power reserved therein to the City, or any right to damage thereunder; no breach of this contract shall be held to a waiver of any or subsequent breach. All remedies shall be taken and construed as cumulative.
4.23 Testing - Unless otherwise stated in the Contract Documents, all required testing will either be performed directly by an independent laboratory coordinated and paid for by the C ontractor. The Contractor shall submit the resulting certified test results and Certificates of Compliance for all materials requiring such as specified in the Technical Provision. Contractor shall cooperate with the City in coordinating the necessary testing. The coordination of testing, including the number and location of tests,
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shall be under the direction of the Engineer. All compaction test sites deeper than five (5’) feet below grade shall be properly shored by the Contractor to protect testing personnel.
The cost for performing re-tests due to failures, or additional call-outs if work is not ready to test, will be charged to the Contractor. The City shall require retesting until all required tests are successfully passed.
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SECTION 5 – CHANGES IN WORK
5.01 Limited City Authority to Approve Change Orders - The Contractor recogni zes that the City is a public agency and that it can only act through its duly authorized agents. In this regard, the Contractor agrees that only written change orders, executed by the governing body of the City, shall be valid. The Engineer shall have no authority to issue a change order unless so specifically authorized, and no person shall have authority to issue any oral change order.
5.02 Contractor Liability for Unapproved Change Orders - Unless a valid change order is issued, all changes in the work performed by the Contractor shall be at the Contractor’s own risk, and shall not be entitled to any additional compensation. Furthermore, the Contractor may be required to make the work conform to the plans and specifications. No act or series of acts by the City during the course of the contract shall be deemed to constitute a waiver of the City’s right to rely upon the provisions of this Section 5, “Changes in Work”.
5.03 Non-Material Change Requests by the Contractor - Changes in the plans and specifications requested in writing by the Contractor, which do not materially affect the work and which are not detrimental to the work or to the interests of the City, may be granted to facilitate the work, when approved in writing by the Engineer. If such changes are granted, they shall be made at a reduction in cost or at no additional cost to the City. Nothing herein shall be construed as granting a right to the Contractor to demand acceptance of such changes or to increase the contract sum or contrac t time as a result of the proposed change.
5.04 Ef
fect of Extension of Time - The granting of any extension of time due to delays which, in the judgment of the City, are unavoidable delays shall in no way operate as a waiver on the part of the City of his/her rights under this contract.
5.05 Letters of Instruction - The Engineer may issue letters of instruction in the form of Field Orders, Clarifications, responses to Requests for Information, or any other document which makes interpretations or clarifications to the Contract Documents that do not modify the scope of work or involve an adjustment in the contract sum or contract time. Letters of Instruction shall be binding upon the Contractor, and the Contractor shall promptly carry out the requirements of such Letters of Instruction.
5.06 Requests for Information, Inconsistencies and Changed Conditions - Before undertaking each part of the work, the Contractor shall carefully study all pertinent figures shown in the Contract Documents and verify that all applicable field measurements are free of conflicts, errors, discrepancies, inconsistencies and omissions. If such conditions are discovered, the Contractor shall notify the Engineer by writing a Request for Information, and await direction from the Engineer before proceeding.
If the Contractor encounters a changed condition, as defined by one or more of the conditions below, the Contractor shall notify the Engineer by writing a Request for Information before disturbing the condition further.
(a) Material differing from that represented in the Contract which the Contractor believes may be hazardous waste, as defined by Health and Safety Code, Section 25117 that is required to be removed to a Class I, Class II, or Class III disposal site in accordance with provision of existing law; and
(b) Subsurface or latent physical conditions at the site differing materially from those represented in the Contract Documents; and
(c) Unknown physical conditions at the site of any unusual nature, which differ materially from those ordinarily encountered and generally recognized as inherent in the work and of the character provided for in the Contract Documents.
No extension of Contract time shall be made by the City due to the Contractor’s failure to provide a timely written notice of any inconsistency or changed condition requiring direction. The Engineer will
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respond to the Contractor’s Request for Information within three working days, providing an interpretation, clarification or change order for an appropriate adjustment in contract time and cost pursuant to General Provisions, Section 5.07, and “Change Orders”. Contractor shall wait for the Engineer’s written response to a Request for Information before proceeding with any work.
The Contractor shall not be liable to the City for failure to report any conflict, error, or discrepancy in the Contract Documents, unless the Contractor had actual knowledge or could foresee such condit ions as may be discovered by a reasonable examination of the work site or materials. If the Contractor performs any construction activity in which he or she knows or should know involves an error, inconsistency, ambiguity, or omission referred to in this Section, without notifying and obtaining the written consent of the Engineer, Contractor shall be responsible for the resultant costs, including, without limitation, the costs of correcting defective work. However, in an emergency affecting the safety of persons or property, the Contractor shall take all reasonably necessary precautions to prevent or minimize damage, injury, or loss.
5.07 Extra and Omitted Work - Whenever corrections, alterations or modifications of the work under this contract are ordered and approved by the Engineer and increase the amount of work to be done, such added work shall be known as Extra Work . When such corrections, alterations or modifications decrease the amount of work to be done, such deleted work shall be known as Omitted Work. The General and Special Provisions shall apply with equal force to all extra and omitted work.
When the Contractor considers that any changes ordered involve extra or omitted work, he or she shall immediately notify the Engineer in writing and subsequently keep him/her informed as to when and where the alleged extra work is to be performed.
When extra work reports are agreed upon and signed by both parties, they shall become the basis of payment. When extra work is still under negotiation or has not been agreed upon, the Contractor shall keep daily detailed and accurate records itemizing each element of cost and shall provide certified payroll, invoices, and other substantiating records and documentation with records and/or clai ms for compensation to be provided no later than 30 days following the time in which the work claiming to be extra was performed.
Unless notification of extra work is documented, and unless a complete statement of materials used and expenses incurred is furnished by the Contractor, the C ontractor shall not be entitled to payment of such alleged extra work, and any future claims for compensation will be invalid.
Payment for extra work shall be in accordance with General Provisions, Section 5.08 - “Change Orders”. Omitted work shall not constitute a claim for damages on account of anticipated profits on the work that may be omitted.
5.08 Change Orders – At any time during the progress of the work, and without in any way rendering void the Agreement, the City may order alterations, additions or deductions from the work by change order, without notice to sureties. When so ordered in writing, the Contractor shall proceed with work as directed by the change order.
The change order shall describe the change in the work, the adjustment of the contract sum (if any), and the adjustment of the contract time (if any). The Contractor shall not be entitled to any extension of time for the completion of the work by virtue of any change order unless the change order specifically provides for this. If, after receiving a change order, the Contractor feels that he or she is entitled to an extension of time, he or she may, within five (5) working days file a written claim to that effect for consideration by the Engineer.
The process of submitting a proposed change, a cost proposal, or negotiating an agreed upon change order, or any failure to reach an agreement as to an adjustment in the contract sum or the contract time, shall not relieve the Contractor of his/her obligation to perform in accordance with the Contract Documents.
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A change order may be in the form of a City directed change order or an agreed upon change order. Upon the receipt of either form of change order, the Contractor shall proceed promptly and diligently with the extra work.
(a) City Directed Change Orders - A City directed change order may be issued by the City without the Contractor’s signature where the City determines that it is in the City’s best interest to proceed with the work, and the change does not materially alter the character of the work. The Contractor shall be deemed to have accepted the terms of any City directed change order unless the Contractor asserts a claim with respect to the change order, no later than ten (10) working days following the Contractor’s receipt of the change order. See General Provisions, Section 5.09`, “Disputed Work”. (b) Agreed Upon Change Orders - Within five (5) working days after receiving a request from the City for a written proposal for an agreed upon Change Order, the Contractor shall provide the Engineer with a cost proposal in a form satisfactory to the Engineer, setting forth the Contractor’s proposed adjustments to the contract sum and contract time for performing the extra work.
Compensation for agreed upon change orders shall be calculated based upon the unit prices stated in the Bid Schedule and no additional markup for overhead or profit will be provided unless stated otherwise as follows. If there are no unit prices for the extra work, the Contractor and the City may agree upon unit prices or lump sum costs, which shall be used to increase or decrease the contract sum. In the absence of any suc h agreement, the contract sum shall be adjusted by Force Account.
1. Quantity Adjustments - Unit prices shall govern not only for alterations to work covered by written specifications and drawings, but also for other work incidental or necessary to completing the work for which written specifications and drawings may be later prepared. Whenever an item of work or materials is specified in the contract by unit price and is increased or decreased by more than 25 percent (25%), Section 9- 1.06 of the Standard Specifications shall govern payment. This Section allows for a renegotiation of the unit pr ice based upon consideration of the total pay item cost. If, however, a renegotiated price cannot be reached by the Contractor and the City, then the payment for this item shall be adjusted by Force Account.
2. Agreed Upon Price – If there are no unit price s for proposed extra work, the Contractor and the City may agree upon unit prices or lump sum costs, by written change order, prior to commencing work. In the absence of any such agreement, the contract sum shall be adjusted by Force Account.
3. Force Accoun t - When extra work is to be paid on a force account basis, the labor, materials and equipment used in the performance of that work shall be paid in accordance with the 2010 State Standard Specification, Section 9 -1.04 “Force Account .” To the total of the direct costs computed, there can be an added markup of up to thirty-five percent (35%) to the cost of labor, up to fifteen- percent (15%) to the cost of materials and up to fifteen-percent (15%) to the cost of equipment. These markups shall constitute full compensation for any and all overhead costs, profit, or other costs not specifically designated as a cost of labor, material or equipment. When subcontractors perform force account work, an additional ten-percent (10%) markup shall be added to the total cost of the extra work to reimburse the Contractor for additional administrative costs. No markup for any Subcontractor beyond the first tier shall be paid.
During the performance of extra wor k by Force Account, and as a condition to the Contractor’s right to an adjustment of the contract sum, the Contractor shall prepare daily reports itemizing all costs for labor, materials, and equipment rental and provide certified payrolls . For labor cost s, the reports shall include names, job classifications, hours worked and rates of pay. For equipment costs, the reports shall include size, type, identification number and hours of operation. All records and reports shall be submitted to the Engineer for approval on a daily
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basis. Reports shall be made on the State of California, Daily Extra Work Report Form or on a similar form approved by the Engineer.
i. Labor - Labor costs shall be based on the prevailing wage scale for each craft or type of workman, and no compensation shall be allowed for payment in excess of the prevailing wage. Employer payments for payroll taxes and insurance, health and welfare, pension, vacation, and other direct labor costs shall be included and will be calculated as the Labor Surcharge stipulated in the State of California, Labor Surcharge and Equipment Rental Rates book.
ii. Materials - Materials cost shall be the cost of all materials purchased by the Contractor and used in the extra work and shall be the actual cost of such materials, including sales taxes, freight and delivery charges. The City reserves the right to reject materials to be furnished by the Contractor, sources of supply or, if necessary, to furnish the materials to the Contractor. No compensation will be paid to the Contractor for any material furnished by the City or for materials not used. iii. Equipment Rental - The Contractor will be allowed the actual rental rate of equipment, prorated over the time the machinery or equipment is required. For Contractor owned equipment, this rate shall be as stipulated in the State of California, Labor Surcharge and Equipment Rental Rates book. In addition, the Contractor will be allowed reasonable move-in and move-out charges, if applicable. All equipment shall, in the opinion of the Engineer, be in good working order, good condition, and suitable for its purpose. Equipment or tools having a replacement value of $200.00 or less, whether or not consumed by use, shall be considered small tools and no payment will be made therefore. iv. Other Services or Expenditures - The City may authorize and approve payment for work performed by special forces or necessary services and expenditures other than labor, materials, and equipment rental.
5.09 Disputed Work - When the Engineer and Contractor fail to agree as to whether an alteration ordered by the Engineer constitutes a material change or difference in the character of the work, or fail to agree upon the compensation to be allowed for such altered work, the Contractor shall proceed with the altered work and file with the Engineer, within ten (10) working days after receiving direction from the Engineer, a written protest detailing the particulars of the dispute and the amount of additional compensation or time required for the alteration. Failure of the Engineer to recognize a change in the character of work when ordering alterations shall in no way be construed as relieving the Contractor of the Contractor’s duty and responsibility for filing a protest as prescribed above. The City will not consider additional compensation for altered work unless the Contractor files a written protest within ten (10) working days after receiving direction from the Engineer.
If the Contractor has complied with the notification requirements of this sub-section, consideration of payment due shall be made as later determined through claim resolution procedures as set forth in General Provisions, Section 10, “Measurement and Payment”.
Although not to be considered as approval for proceeding under extra work provisions, the Contractor shall keep and furnish records of disputed work in accordance with General Provisions, Section 5.07, “Extra Work”.
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SECTION 6 - CONTROL OF MATERIALS
6.01 Materials and Workmanship - All materials, parts and equipment furnished by the Contractor in the work shall be new, high grade, and free from defects. Workmanship shall be in accordance with generally accepted standards. Materials and workmanship shall be subject to the Engineer’s approval.
Materials and workmanship not conforming to the requirements of these specifications shall be considered defective and will be subject to rejection. Defective work or material, whether in place or not, shall be removed immediately from the site by the Contractor, at his/her expense, when so directed by the Engineer.
If the Contractor fails to replace any defective or damaged work or material after notice from the Engineer, the Engineer may cause such work or materials to be replaced. The replacement expense shall be deducted from the amount to be paid to the Contractor.
Used or secondhand materials, parts and equipment are permissible only if permitted by the Special Provisions.
Specialized material or equipment to be used in the work that is not readily available from material suppliers (such as electroliers, luminaries, signal poles, heads, cable, controllers, pumps, etc.) shall be ordered within five (5) days after award of the contract. Time extensions will not be granted for project delays due to the unavailability of such specialized material and equipment unless the Contractor furnishes the Engineer with documentation of purchase order dates, acceptable reason for delay of delivery, or proof of diligent efforts to obtain said items from alternate sources.
The Contractor shall provide the Engineer with periodic reports to inform the Engineer of any changes in the projected material or equipment delivery dates.
6.02 Protection of Work and Materials - The Contractor shall provide and maintain storage facilities and employ such measures as will preserve the specified quality and fitness of materials to be used in the work. Stored materials shall be reasonably accessible for inspection. The Contractor shall also adequately protect new and existing work and equipment for the duration of his/her contract.
The Contractor shall not, without the City’s consent, assign, sell, mortgage, hypothecate, or remove equipment or materials which have been installed or delivered and which may be necessary for the completion of the contract.
6.03 Trade Names or Equals – In accordance with Public Contract Code Section 3400, whenever any particular material, process, or equipment is indicated by patent, proprietary or brand name, or by the name of a manufacturer or supplier, such wording is used for the purpose of facilitating its description and shall be deemed to be followed by the words “or equal”.
Because products specified may have a uniqueness that can’t be matched, the Contractor must “bid” the work based upon the products specified. If, during the submittal process, an equivalent product is proposed by the contractor, the contractor shall provide data to show that the product is considered equal. Contractor shall also identify any price differences, which shall be considered as part of the substitution and if accepted, shall result in an appropriate credit or cost to the City by change order should the substitution be made.
Unless otherwise authorized by the Engineer, the proposed subst itution must be submitted in sufficient time, before the normal use or installation of the material, process or equipment, for the Engineer to determine the equivalency and for the Contractor to make any required purchases (including delivery).
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The Engineer shall be responsible for solely determining whether the material proposed for substitution is equivalent to that specified, and the Engineer’s findings shall be final. If a substitute offered by the Contractor is found to be not equal to the specified material, the Contractor shall furnish and install the specified material.
The specified contract completion time shall not be affected by any circumstances developing from the provisions of this Section.
6.04 Inspection of Materials by City - Unless otherwise specified, inspection may be required at the source for such typical materials and fabricated items as bituminous paving mixtures, structural concrete, metal fabrication, metal casting, welding, concrete pipe manufacture, protective coating application, and similar shop or plant operations.
Standard items of equipment such as electric motors, conveyers, elevators, plumbing fixtures, etc., are subject to inspection at the job site. Special items of equipment such as designed electrical panel boards, large pumps, sewage plant equipment, etc., are subject to inspection at the source, normally only for performance testing. The Special Provisions may specify additional inspection requirements.
6.05 Inspection of Materials by Others - When the City does not elect to make its own inspection at the source, the City may, at its expense, engage an inspector or accredited testing laboratory to inspect the materials, equipment or process. The inspector or representative of the testing laboratory shall judge the materials by the requirements of the plans and specifications. No materials or equipment shall be shipped nor any processing, fabrication or treatment of such materials shall be done without a favorable inspection by the engaged agent. These materials shall be subject to re- inspection at the job-site.
6.06 Tests of Materials - Before incorporation into the work, the Contractor shall submit samples of materials, as the Engineer may require, at no cost to the City. The Contractor, at his/her own expense, shall deliver the materials for testing to the place, and at the time designated, by the Engineer.
Unless otherwise provided by the Special Provisions, all testing shall be performed under the direction of the Engineer, and at no expense to the Contractor.
The Contractor shall notify the City in writing at least fifteen ( 15) days in advance of his/her intention to use materials for which tests are specified, to allow sufficient time for the City to perform the tests. The notice shall name the proposed supplier and source of material.
6.07 Certification – The Engineer may waive material testing requirements of the Specifications and accept the manufacturer’s written Certificate of Compliance or test data demonstrating that the materials to be supplied meet the requirements of the specifications. A Certificate of Compliance is acceptable for authorizing the use of steel pipe in sizes less than eighteen (18) inches and vitrified clay, cast iron or ductile iron pipe in all sizes. All materials used on the basis of a Certificate of Compliance may be sampled or tested by the City at any time. The fact that material is used on the basis of a Certificate of Compliance shall not relieve the Contractor of the responsibility for incorporating materials in the work which conforms to the requirements of the Contract Documents.
6.08 Weighing and Metering Equipment – All scales and metering equipment used for proportioning materials shall be inspected for accuracy and certified within the past twelve (12) months by the State of California Bureau of Weights and Measures, by the County Director or Sealer of Weights and Measures, or by a scale mechanic registered with or licensed by the County,
The accuracy of the work by a scale service agency, except as stated herein, shall meet the standards of the California Business and Professions Code and the California Code of Regulations pertaining to weighing devices. A certificate of compliance shall be presented to the Engineer for approval prior to operation, and shall be renewed whenever required by the Engineer at no cost to the City.
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All scales shall be arranged so they may be read easily from the operator’s platform or area.
They shall indicate the true net weight without the application of any factor. The figures of the scales shall be clearly legible. Scales shall be accurate to within one- percent (1%) when tested with the plant shut down. Weighing equipment shall be so insulated against vibration or moving of other operating equipment in the plant area such that the error in weighing with the entire plant running will not exceed two-percent (2%) for any setting nor one and one half percent (1.5%) for any batch.
6.09 Calibration of Testing Equipment – Testing equipment, such as but not limited to, pressure gages, metering devices, hydraulic systems, force (load) measuring instruments, and strain - measuring devices shall be calibrated by a testing agency acceptable to the Engineer at intervals not to exceed twelve (12 ) months, and following repairs, modification, or relocation of the equipment.
Calibration certificates shall be provided when requested by the Engineer.
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SECTION 7 – UTILITIES
7.01 City’s Statutory Obligation - Pursuant to Government Code, Section 4215: “in any contract to which a public agency as defined in Section 4401 is a party, the public agency shall assume the responsibility, between the parties to the contract, for the timely removal, relocation, or protection of existing main or trunk line utility facilities located on the site of any construction project that is the subject of the contract, if such utilities are not identified by the public agency in the plans and specifications made a part of the invitation for bids. The contract documents shall include provisions to compensate the Contractor for the costs of location, repairing damage not due to the failure of the Contractor to exercise reasonable care, and removing or relocating such utility facilities not indicated in the plans and specifications with reasonable accuracy and for equipment on the project necessarily idled during such work. The Contract documents shall include provisions that the Contractor shall not be assessed liquidated damages for delay in completion of the project, when such delay was caused by the failure of the public agency or the owner of the utility to provide for removal or relocation of such utility facilities.”
7.02 Contractor’s Obligation to Identify and Protect Subsurface Infrastructure - The Contractor shall locate and protect service laterals, conduits, and appurtenances of any underground facility, the presence of which could be reasonably inferred from the Contract Documents or from the presence of visible facilities such as buildings, meters, and junction boxes, prior to doing any work that may damage any such facilities, or interfere with their service. Where underground main distribution conduits, such as water, gas, sewer, electric power, telephone, or cable television are shown on the plans, the Contractor shall assume that every parcel will be served by a service connection for each type of utility. The Contractor shall comply with all requirements for the protection of underground infrastructure as set forth in Government Code, Sections 4215 through 4216.9.
It shall be the Contractor’s responsibility to complete all work in a manner that satisfies utility company standards, providing if requested, detailed plans prepared by a California Registered Civil Engineer showing necessary temporary support of utilities during coordinated construction work. The Contractor is directed to contact these agencies before submitting bids and to be familiar with their requirements and shall include all costs of this coordination within the proposals bid prices.
The Contractor agrees to assume liability and to hold the City of San Carlos, its officers, and employees harmless from any damages resulting from the existence of underground utilities and structures not reported to the Engineer, not indi cated on the public records examined, or located at variance with that reported or shown on records examined.
7.03 Location - The City will search known records and indicate on the plans those utilities, except service connections, which may affect the work. All available information regarding removal, relocation, or disconnection of utilities, or installation of new utilities, will be furnished to prospective bidders before the receipt of bids. The Contractor shall immediately report to the Engineer those utilities omitted from the plans or found substantially at variance with the location shown.
Existing and proposed utilities and improvements are shown in their approximate locations.
Locations may not have been field verified and no guarantee is made as to the accuracy and completeness of the information shown. The fact that any facility is not shown on the plans shall not relieve the Contractor of his/her responsibility under this Section. It shall be the Contractor’s responsibility to determine the existence and location of utilities shown on the plans, indicated by field locating services, or evidenced by facilities visible in the field. No additional compensation will be allowed for delays incurred as a result of the Contractor’s failure to field verify and/or pothole existing utilities prior to beginning construction. Potholing shall be considered as part of the various contract bid items and no additional compensation will be allowed.
At least three (3) working days prior to commencing work, the Contractor shall request that utility and agencies mark or otherwise indicate the location of their substructures. Contractor shall contact Underground Service Alert (USA) at (800) 642 -2444 and the Engineer at least forty-eight (48) hours prior to excavation. The location of utilities as shown on the plans are approximate and are not to be construed as certainty. It shall be the Contractor’s responsibility to determine the true location and depth of all utilities and service connections affecting or conflicting with the work, prior to the performance of the
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work. As necessary, the Contractor shall pothole these utilities prior to working in the area to avoid damage to them. Potholing shall be considered as part of the contract bid items, and no separate payment will be made. Contractor shall familiarize himself/herself with the type, material, age and condition of any utility which may be affected by the work.
7.04 Protection - As necessary or as directed by the Engineer, the Contractor shall field adjust proposed improvements to avoid conflicts with existing improvements. The Contractor shall not interrupt the service function or disturb the supporting base of any utility, without authority from the utility Owner or order from the City.
Where protection is required to ensure support of existing underground, overhead and at -grade utilities (including their associated structures and service connections) as shown on the plans, the Contractor shall furnish and place the necessary protection at his/her expense. In case of damage, the Contractor, without additional compensation, shall restore utilities to as good of a condition as they were found.
Upon learning of the existence and location of any utility omitted from or shown incorrectly on the plans, the Contractor shall notify the City and be fully responsible for protecting such utility. When authorized by the Engineer, additional protection may be paid by change order, for utilities other than a service connection.
The Contractor shall immediately notify the Engineer and the utility owner if he or she disturbs, disconnects or damages any utility. If the utility is located substantially as indicated on the plans, the Contractor shall bear the costs of repair or replacement.
When placing concrete around or contiguous to any utility, the Contractor shall at his/her expense, furnish and install a cushion of expansion joint material, clear opening, sleeve, or other suitable material approved by the Engineer so as to prevent embedment or bonding of the utility with the concrete.
7.05 Shut Down Notification – The City is in -charge of the sewer and storm water collection systems, traffic signals and street lighting system and as such the Contractor shall coordinate shut downs of these utilities and facilities with the City’s Engineer and Public Works Maintenance Department. The Contractor shall also coordinate the shutdown of all other utilities, including, but not limited to water, electricity, gas, communications, or CATV with the corresponding utility owner.
Shut downs of any utility or other facility, when allowed, shall be done only after:
A. The Contractor has coordinated with and notify the Engineer/Utility Owners in writing, at least seventy-two (72) hours in advance of the shut down, and, B. H as properly notified customers (residents, businesses/agencies) emergency response staff, and, C. Has all materials required for the work at the job site prior to requesting a shut off.
Except for scheduled shutdowns and in cases of emergency, the Contractor shall notify all customers and effected parties of a shutdown at least forty- eight (48) hours in advance by writing and four (4) hours in advance by person to allow adequate draw time. Once shut down, the Contractor shall proceed with the work in an expedient manner until the water lines or sewer lines are back in service.
7.06 Removal - Unless otherwise specified, the Contractor shall remove all portions of interfering utilities shown on the plans as ‘abandoned’ or “to be abandoned in place”. Before starting removal operations, the Contractor shall ascertain from the utility Owner whether abandonment is complete. The costs involved in the removal and disposal of utilities to be abandoned shall be considered as part of the contract bid items, and no separate payment will be made.
7.07 Relocation - When feasible, the utilities within the area affected by the work will complete their necessary installations, relocations, repairs, or replacements before commencement of work by the Contractor. When the Contract Documents or plans indicate that a utility is to be relocated, altered or constructed by others, the City will conduct all negotiations with the utilities and the work will be done at no cost to the Contractor.
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Utilities interfering with the permanent project work, discovered after the award of the contract, shall either be relocated, altered, or reconstructed by the utility, or the Engineer may order changes in the work to avoid interference. Such changes will be paid for in accordance with General Provisions, Section 5, “Changes in Work”.
When the plans or specifications provide for the Contractor to alter, relocate, or reconstruct a utility, all costs for such work shall be absorbed in the contract bid items. Temporary or permanent relocation or alteration of utilities by the Contractor for his/her own convenience shall be his/her responsibility, and he or she shall make all arrangements, obtain all approvals, and bear all costs. The Contractor may, for his/her own convenience or to expedite the work, agree with the owner of any utility to disconnect and reconnect interfering service connections. The City shall not be involved in any such agreement.
7.08 Delays - The Contractor is responsible for notifying utility companies in time to prevent delays attributable to utility relocations or alterations as called for in the Contract D ocuments. The Contractor shall not be entitled to damages or additional payment if such delay does occur. The Engineer will determine the extent of the delay based on the Baseline Construction Schedule (Section 8.05) and on the project as a whole, and any commensurate extension of time.
7.09 Cooperation - When necessary, the Contractor shall conduct his/her operations so as to permit access to the worksite and provide time for utility work to be accomplished during the progress of the contract work.
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SECTION 8 – PROSECUTION AND PROGRESS
8.01 Notice to Proceed - Within twenty-one (21) calendar days following receipt of the signed agreement, bonds and insurance, the City shall issue the Contractor a Notice to Proceed provided that the documents are acceptable to the City. Unless stated otherwise, the contract time shall commence upon the receipt date on the Notice to Proceed.
8.02 Commencement of Work - Work shall commence within fifteen (15) calendar days following the receipt date on the Notice to Proceed, and shall be diligently prosecuted to completion within the time provided in the Notice to Bidders.
8.03 Subcontracting - Unless otherwise indicated by the Special Provisions, the Contractor shall perform the majority of the project work.
8.04 Administrative Duties - The Contractor shall coordinate the scheduling and timing of administrative duties with other activities to avoid conflicts and to ensure orderly project progress. Such activities include, but shall not be limited to, the preparation of construction schedules, preparation and processing of submittals, requests for information and responding to requests for quotations, attending and preparing for progress meetings and coordinating project closeout activities.
8.05 Baseline Construction Schedule – Within ten (10) calendar days of the Notice to Proceed, the Contractor shall submit to the Engineer an acceptable Critical Path Method (CPM) progress schedule showing the critical path for completing the various items of work within the number of contract days specified. The schedule shall show the order in which the Contractor proposes to carry out the major items of work and the dates on which he or she will start and finish the various items (including procurement of materials and equipment). If requested, the schedule shall be resource loaded to reflect person/crew hours and equipment loading for various construction activities in order for the City to better evaluate the proposed schedule.
(a) City Review of Schedule – The City may review and note exceptions to the Contractor’s schedule, if it is not sufficiently detailed to clearly show the work to be completed during each month to assure the completion of the work within the project duration. The Contractor will be solely and exclusively responsible for resolving any exceptions, and the City’s review will not create any scheduling obligations of the City. Any noted corrections to the schedule shall be addressed within five (5) working days. (b) Update of Schedule – After submission of a schedule to which the City has taken no exceptions, the Contractor shall submit an updated schedule on a monthly basis or as otherwise specified by the City until completion of the work. The updated schedule must show the “As Constructed” progress up to the date for which the schedule has been prepared and reflect any proposed changes in the method of operations, to achieve the project milestones within the required project duration. (c) Float – The schedule must show early and late completion dates for each task. The number of days between these dates will be designated as “float”. The float will be assigned to the project and available for the City, at the Engineer’s discretion, to allocate the “float” to the Contractor as needed to complete the work in accordance with the agreement.
(d) Failure to Submit Schedule – If the Contractor fails to submit a schedule within the time periods specified in this sub- section, or submits a schedule to which the City has taken uncorrected exceptions, the City may withhold payments to the Contractor unti l such schedule is submitted and/or corrected in accordance with the Contract Documents.
8.06 Three-Week Look Ahead Schedule - The Contractor is required to furnish to the Engineer, on a weekly basis at the project’s progress meetings, a three-week look ahead schedule. The schedule must show planned activities in sufficient detail to allow proper monitoring of the planned construction activities.
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8.07 Construction Sequence - The Contractor shall prepare and submit at the pre-construction meeting a st aging or phasing plan identifying the sequence of construction work and traffic control needed to complete the project. The staging plan shall be subject to review and approval by the Engineer, prior to the start of construction. The goal of the phasing plan will be to minimize impacts to surrounding businesses and residents in the project areas. When required by the Special Provisions or plans, the Contractor shall follow the sequence of operations as set forth therein.
8.08 Recording Existing Conditi ons - Existing conditions throughout the project site shall be photographed and/or videotaped by the Contractor before starting construction. Recording shall include and show every detail of existing improvements, including the current condition of the curb, gutter, sidewalk, signs, landscaping, streetlights, structures near the project including face of buildings, canopies, shades, fences and any other features within the limits of work. Photos and/or videotape shall be delivered to the Engineer at the pre-construction meeting.
8.09 Preconstruction Conference - The City shall designate a date and time for the pre- construction conference once the contract has been fully executed. At the pre- construction conference, the City shall discuss various administrative procedures and project coordination issues. At a minimum, the Contractor should be prepared to furnish and discuss the following:
(a) Letter designating the Superintendent.
(b) A list of key personnel and emergency contact information including telephone numbers to be used in case of emergency
(c) Sequence or phasing plans identifying the phasing of construction work and any alternative sequences for consideration.
(d) Traffic control plans associated with the staging plans (to be signed and stamped by a Licensed Traffic Engineer).
(e) A draft of the master Baseline C onstruction Schedule, in Critical Path Method (CPM) format (to be finalized no later than ten (10) days after the Notice to Proceed). (f) A breakdown of lump sum bid items to be used as a basis for determining the value of work completed on future progress payments.
(g) A submittal schedule listing all project submittals that will need to be reviewed and a listing of proposed material suppliers.
(h) Utility company coordination and/or permit issues.
(i) Videotape and/or photography of the project’s existing condition (to be completed prior to starting construction.
(j) Anticipated cash flow projections, if requested by the engineer.
8.10 Progress Meeting - The Contractor, Job Superintendent and Subcontractors, if requested by the City, shall attend weekly progress meetings to be scheduled by the Engineer at a time agreeable to both the Engineer and the Contractor. Contractor shall also attend special meetings in addition to regular progress meetings if necessary and directed by the Engineer.
8.11 Hours of Construction - Construction activities shall be limited to the hours of 8:00 a.m. to 6:00 p.m., unless otherwise noted or further restricted in the Contract Documents, or as directed by the Engineer. No work shall be done on weekends, holidays or outside these specified hours, unless otherwise approved by the Engineer. The Contractor shall take into consideration and coordinate time constraints for special events or activities organized by the City or other agencies. No mechanical equipment, including hauling or deliveries by trucks, shall start before 8:00 a.m. and all equipment must shut down before 6:00 p.m. unless approved by the Engineer.
8.12 Prosecution of Work - To minimize public inconvenience and possible hazards and to restore the streets and other work areas to their original condition and former state of usefulness as soon as practicable, the Contractor shall diligently prosecute the work to completion. If, in the Engineer’s
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opinion the Contractor fails to prosecute the work to the extent that the above purposes are not being accomplished, the Contractor shall, upon orders from the Engineer, immediately take the steps necessary to fully accomplish said purposes. All costs for prosecuting the work as described herein shall be absorbed in the Contractor’s bid. Should the Contractor fail to take the necessary steps to fully accomplish said purposes, after orders of the Engineer to do so, the Engineer may suspend the work in whole or in part, until the Contractor takes said steps. With or without such suspension, the Engineer may cause such steps to be taken by force account or by other means at the Contractors expense.
8.13 Suspension of Work - Work may be stopped or suspended in whole or in part for up to ninety (90) days when, in the Engineer’s opinion, the suspension is necessary and in the interest of the City. The Contractor shall immediately comply with any written order of the Engineer suspending work.
Such City directed suspension shall be without liability to the Contractor on the part of the City.
Suspended work shall be resumed upon written order of the Engineer. An extension of contract time equal to the period of suspension shall be issued to the Contractor by change order. Any claim by the Contractor for an adjustment of the contract sum or the contract time shall be made within ten (10) working days after the end of the work suspension.
If work is suspended through any fault of the Contractor, all expenses and losses incurred by the Contractor during such suspensions shall be borne by the Contractor. If the Contractor fails to properly provide for public safety, traffic, and protection of the work during periods of suspension, the City may elect to do so, and shall deduct the cost thereof from monies due the Contractor. Such action will not relieve the Contractor from any liability.
8.14 Default by the Contractor and Termination of Control - As a result of any of the following events, the Contractor shall be deemed to be in default:
(a) If the Contractor is in bankruptcy or makes a general assignment for the benefit of creditors, or
(b) If the Contractor fails to make prompt payment to subcontractors for labor or materials, or (c) If a receiver is appointed on account of the Contractor’s insolvency, or (d) If the Contractor fails to provide enough properly skilled workmen or enough materials to insure compliance with the construction time schedule, or (e) If the Contractor fails to perform any portion of the work within the timing requirements of the Contract Documents, or abandons the project site, or (f) If the Contractor disregards instructions from the Engineer or violates any provision of the contract, or
(g) If the Contractor fails to replace or repair any damage caused by the Contractor or its agents, representatives, contractors, subcontractors, or employees in connection with the performance of the work, or
(h) If the Contractor violates any legal requirement related to the work.
In case of default, the City may give written notice to the Contractor and the Contractor’s bonding agent that if the default is not remedied within ten (10) calendar days or the Contractor does not provide adequate written assurance to the satisfaction of the Engineer that the cure will be forthcoming, the Contractor’s control over the work may be terminated as of the date specified in the written notice.
Upon such termination of control the City may enter upon and take possession of the entire work and may also take possession, for the purpose of completing the work, of all of the Contractor’s tools, equipment and appliances upon the work, and all materials on the site or stored off -site for incorporation into the work. The City may, at its sole option and without further notice to anyone, complete the work by day labor, by contract entered into by negotiations, by competitive bidding, by calling upon the performance of the performance bond surety, or by other means as the City, in its discretion, shall elect.
After termination of the Contractor’s control over the work as herein provided, the Contractor shall not be entitled to any further payments under the contract until the entire work thereunder has been fully
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completed and finally accepted by the City. After such completion and acceptance, if the “unpaid balance of the contract price” (as defined in the next paragraph) exceeds the sum of the amounts expended by the City in taking over and completing the work, including all managerial and administrative ex pense incurred by the City on account thereof and the amount of all damages incurred by the City by reason of the Contractor’s default, such excess shall be paid to the Contractor. If the said amount expended exceeds the unpaid balance, the Contractor and his/her surety shall be liable to the City for the difference.
At the Contractor’s request, the expense incurred by the City in taking over and completing the work, and the amount of any damage incurred by the City by reason of the Contractor’s default s hall be audited and certified by an independent third party, whose certificate thereof shall be binding and conclusive upon the parties.
For the purposes of the computations required by the paragraph above, the “unpaid balance of the contract price” shall be the original contract price as adjusted by any change orders issued prior to termination of the Contractor’s control, less all payments made on account thereof prior to such termination, and less any and all amounts withheld or paid pursuant to stop notices filed with the City upon claims of subcontractors or others from equipment, labor or materials furnished to the work on behalf of the Contractor.
Upon completion and acceptance of the work, the Contractor shall be entitled to the return of all materials not used in the work, but without claim against the City for loss or damage with respect thereto, and shall be entitled to the return of all his/her equipment, tools and appliances taken possession of by the City, but without claim against the City for any charge for the use thereof or for usual and ordinary depreciation and wear and tear.
The exercise of remedies provided for in this sub-section, for default by the Contractor, shall be in addition to, and shall not be deemed a waiver by the City of any other rights or remedies due the City under the contract provisions, for default by the Contractor.
8.15 Contractor’s Right to Stop Work or Terminate Contract – The Contractor may give written notice to the Engineer of intention to stop work or terminate the Agreement, or both if the work should be stopped by order of any court or other public authority, through no act, omission or fault of the Contractor or any Subcontractor, agent or employee of the Contractor, and such work stoppage under such order shall continue for thirty (30) consecutive days from the effective date of such order
If, after the Contractor provides notice to the City of any of the above defaults, the City does not remedy the default within ten (10) calendar days, the Contractor may stop work and may give the City written notice of contract termination. The Contractor may then recover from the City payment for all work executed to date and any loss sustained upon any equipment or materials procured for the work prior to the work stoppage. No compensation for loss of anticipated profits will be provided, however, on work not completed. The Contractor’s right to recovery shall be subject, however, to the duty of the Contractor to mitigate all loss or damage so far as reasonably possible.
8.16 City’s Right to Terminate Contract – The City may, at its option, terminate the Agreement, in whole or from time to time in part, at any time by giving notice to the Contractor. Upon such termination, the Contractor agrees to waive any claims for damages, including loss of anticipated profits, on account thereof; and, as the sole right and remedy of the Contractor, the City shall pay the Contractor in accordance with this sub-section. Upon termination, the obligations of the Contractor for portions of the work already performed shall continue.
(a) Upon receipt of a Notice of Termination, the Contractor shall, unless the notice directs otherwise, do the following:
1. Immediately discontinue the work to the extent specified in the notice.
2. Place no further orders or subcontracts for materials, equipment, services, or facilities, except as may be necessary to complete such portion of the work that are not to be discontinued.
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3. Promptly cancel, on the most favorable terms reasonably possible, all subcontracts to the extent that they relate to the performance of the discontinued portion of the work.
4. Thereafter do only such work as may be necessary to preserve and protect the work already in progress and to protect materials, plants, and equipment on the project site or in transit thereto.
(b) Upon such termination, the City shall pay to the Contractor as a sole and exclusive remedy for the termination, the sum of the following, and the Contractor will be entitled to no other compensation or damages, and expressly waives same:
1. The amount of the contract amount allocated to the portion of the work properly performed by the Contractor as of the date of termination, less sums previously paid to the Contractor, plus
2. Previously unpaid costs of any items delivered to the project site which were fabricated for subsequent incorporation in the work, plus
3. Any proven losses with respect to materials and equipment directly resulting from such termination, plus
4. Reasonable demobilization costs in excess of what would have been incurred if work were not terminated, plus
5. Reasonable costs for preparing a statement of the aforesaid costs, expenses, and losses in connection with such termination.
The City may terminate the Agreement at its own discretion or when conditions encountered during the work make it impossible or impracticable to proceed, or when the City is prevented from proceeding with the Agreement by act of God, by law, or by official action of a public authority.
8.17 Time of Completion and Days Charged - The Contractor shall diligently prosecute and fully complete the work within the number of calendar or working days set forth in the Notice inviting Sealed Proposals or shall be subject to liquidated damages. Time is of the essence in the performance of all obligations under the Contract Documents, and all timing requirements shall be strictly adhered to unless otherwise modified by the City. See General Provisions, Sections 8.12, “Prosecution of Work”, and 8.18, “Liquidated Damages”.
Under a calendar day contract, City observed holidays and inclement weather delays are to be anticipated and unless there is a deviation from what is customary for the time of year the project is under construction, no additional days will be granted. Every day, including holidays, Saturdays and Sundays shall be counted as a day charged under a calendar day contract.
Under a working day contract, the Contractor will be given credit for City observed holidays and inclement weather delays, in accordance with the State Standard Specifications. Should the Contractor prepare to begin work at the regular starting time in the morning of any day on which inclement weather, or the conditions resulting from the weather prevents the work from beginning at the usual starting time and the crew is dismissed as a result thereof and the Contractor does not proceed with at least seventy- five percent (75%) of the normal labor and equipment force engaged in the current controlling operations for at least sixty percent (60%)of the total daily time being currently spent on the controlling operations, the Contractor will not be charged for a working day whether or not conditions should change thereafter.
8.18 Liquidated Damages - The City and the Contractor, by execution of the agreement, each agree that time is of the essence in the performance of the work, and that actual damages for inconvenience and loss from any delay in completion of the contract beyond the date provided in the Notice to Bidders is extremely difficult or impossible to determine.
The City and the Contractor further agree, as specified in the Notice to Bidders, that liquidated damages shall be assessed for each and every calendar day required to complete the contract in excess of the contract time established for the project, and that the amount stated therein is a reasonable
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estimate of the amount of such damages. The Engineer may deduct any liquidated damaged owed to the City, as determined by the Engineer from any payments otherwise payable to the Contractor under this agreement.
In addition, the City shall have the right to charge to the Contractor and to deduct from the final payment for the work the actual cost to the City of engineering, inspection, administration and other overhead expenses which are directly chargeable to the contract and which accrue during the period of such delay, except that the cost of final surveys and preparation of the final estimate shall not be included in such charges.
Separate from the above- mentioned liquidated damages, the Contractor shall be responsible for paying all damages incurred by private businesses (residential, commercial or industrial), schools and hospitals due to non-completion of the project by the date specified.
Nothing contained herein shall limit the City’s rights or remedies against Contractor for any default other than failure to complete the work within the contract time. This provision for liquidated damages shall not be applicable nor act as a limitation upon the City if the Contractor abandons the work.
In such event, the Contractor shall be liable to the City for all losses incurred.
The date of the Engineer’s Certificate of Substantial Completion shall be the termination date, if applicable, of liquidated damages.
8.19 Delays and Extensions of Time
(a) Excusable Delays - shall mean delays in the prosecution or completion of the work which result from causes beyond the control of the Contractor and City and which could not have been avoided by the exercise of care, prudence, foresight, and diligence on the part of the Contractor, suppliers, or any tier of the Contractor’s subcontractors. Excusable Delays fall into the following categories:
1. Abnormal Delays – Excusable Delays caused by acts of god, fire, unusual storms, floods, tidal waves, earthquakes, strikes, labor disputes, freight embargoes, and shortages of materials insofar as they prevent the Contractor from proceeding with at least seventy -five percent (75%) of the normal labor and equipment force for at least five (5) hours per day toward completion of the current critical path activity.
2. Weather Delays – Excusable Delays due to inclement weather conditions or the conditions resulting from weather prevent the Contractor from proceeding with seventy-five percent (75%) of the normal labor and equipment force engaged in the current critical ac tivity item for a period of at least five (5) hours per day toward completion of the current critical path activity.
3. Material Shortage Delays – Excusable Delays due to shortages of material, provided that the Contractor submits satisfactory proof to the Engineer. For the proof to be satisfactory, the Contractor must demonstrate that he or she has made every effort to obtain the materials from all known sources within reasonable reach of the proposed work. Only the physical shortage of material, caused by unusual circumstances, will be considered under these provisions as an excusable delay, and no consideration will be given to any claim that material could not be obtained at a reasonable, practical, or economical price, unless it is shown to the satisfaction of the Engineer that such material was only available at exorbitant prices. A material shortage delay will not be considered for material ordered or delivered late or for material whose availability is affected by virtue of mishandled procurement. The above provisions shall apply equally to equipment to be installed in the work.
(b) Compensable Delays - shall include delays that occur in the prosecution or completion of the work, through no fault of the Contractor which prevent the Contractor from proceeding with at least seventy -five percent (75%) of the normal labor and equipment force for at
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least five (5) hours per day toward completion of the current critical activity item(s) on the latest favorably reviewed progress schedule due to the following causes:
1. Delays due solely to the actions and/or inactions of the City.
2. Delays due to changed conditions as defined in General Provisions, Section
5.05, “Requests for Information, Inconsistencies and Changed Conditions”.
3. Delays due to other Contractor s employed by the City who interfere with the Contractor's prosecution of the work as defined above.
(c) Inexcusable Delay - means any delay in the completion of the work beyond the expiration of the contract time resulting from causes other than Excusable Del ays or Compensable Delays. An Inexcusable Delay shall not entitle the Contractor to an extension of the contract time or an adjustment of the contract sum. In addition to liquidated damages for inexcusable delays, the Contractor agrees to pay the City’s actual costs, including charges for engineering, inspection and administration incurred during the delay. (d) Concurrent Delays - those periods of delay when the prosecution of the work is delayed during the same period of time due to causes from a combination of the delays defined as Excusable, Compensable or Inexcusable.
If the Contractor desires an extension of time, he or she shall file a written request based upon the delays reported. The Engineer will ascertain the facts, the extent of the delays, and the effect upon the entire project, and the City will grant an extension of time equivalent to verified time lost. The request for an extension of time must be made no later than ten (10) working days after the start of the condition that purportedly caused the delay, and no later than fifteen (15) working days after the date on which performance on the condition purportedly causing the delay has ended.
Contractor may make a delay claim for an extension of the contract time for an Excusable Delay or a Compensable Delay. If an Excusable Delay and a Compensable Delay occur concurrently, the maximum extension of the contract time shall be the number of calendar days from the commencement of the first delay to the cessation of the delay which ends last. If an Inexcusable Delay occurs concurrently with either an Excusable Delay or a Compensable Delay, the maximum extension of the contract time shall be the number of calendar days, if any, by which the Excusable Delay or the Compensable Delay exceeds the Inexcusable Delay.
For a Compensable Delay, the Contractor may make a delay claim for an adjustment in the contract sum in an amount equal to the sum of the actual and unavoidable additional costs of labor, material, and equipment furnished at the site by the Contractor or subcontractors, including wages, salaries, fringe benefits and payroll taxes.
Extensions of time, when granted, will be based upon the effect of delays to the project as a whole and will not be granted for non -controlling delays to minor portions of the work unless it can be shown that such delays did, in fact, delay the progress of the project as a whole. For purposes of determining delays, all float associated with the project schedule shall belong to the project. See General Provisions, Section 8.05, “Baseline Construction Schedule”.
If delays are caused by unforeseen events beyond the control of either the Contractor or the City, such delays will entitle the Contractor to an extension of time as provided herein, but the Contractor shall not be entitled to damages or additional payment due to these delays. War, governmental regulations, labor disputes, strikes, fires, floods, adverse weather necessitating cessation of work, other similar action of the elements, inability to obtain materials, equipment, or labor because of Federal Government restrictions arising out of National Defense, required extra work, action or inaction by the City, or other specific reasons as may be further described in the specifications may constitute such a delay. If delays beyond the Contractor’s control are caused by reasons other than those mentioned above, but are substantially equal in gravity to those enumerated, an extension of time may be granted, if deemed by the Engineer to be in the best interests of the City.
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The Contractor shall be entitled to an extension of time if delayed due to a failure of the City to furnish necessary right -of-way or materials which the City agreed to furnish, or by the City’s failure to supply necessary plans or instructions concerning the work, after written request by the Contractor.
For Compensable Delay periods resulting in indirect overhead expenses, the Contractor shall be reimbursed as provided for in General Provisions, Section 5, “Changes in Work”.
8.20 Substantial Completion – When work in accordance with the Contract Documents has progressed to a stage of one- hundred percent (100%) complete, as determined by the Engineer, except for the completion of minor punch list items of deficiencies or omissions in the work which require correction in order to satisfy the agreement, yet do not impair the City’s ability to occupy and fully utilize the work for its intended purpose, the project shall be deemed “Substantially Complete”. Portions of the work may also be designated by the City as substantially complete if the Contract Documents require separate delivery.
When the Engineer determines that the work or such designated portions of the work are substantially complete, the Engineer will prepare and sign a Certificate of Substantial Completion. The date of substantial completion shall establish the date at which days charged against the project duration shall terminate. The date of substantial completion shall also establish the date of occupancy by the City and the transfer of responsibility from the Contractor to the City for such items as security, maintenance, heat, utilities, insurance, and damage to the work from causes other than that of the Contractor. Unless otherwise indicated in the Certificate of Substantial Completion, the Contractor’s guarantee for the work shall commence upon the date of substantial completion. See General Provisions, Section 11.01, “Contractor’s Guarantee”.
8.21 Project Closeout - After the Contractor has received the Certificate of Substantial Completion and has only minor work remaining, project closeout may begin. The following items and procedures are required as part of the project close out process. (a) Following the completion of punch list items, the Contractor shall make a written request to the city to conduct a final inspection. The written request shall be accompanied by a Certification that the work has been performed in accordance with the Contract Documents.
(b) Within fourteen (14) days of receipt of the Contractor's Certificate of Completion, a final inspection will be scheduled and conducted by the City. As a result of the inspection, the City will advise the Contractor of any work that must be completed or corrected before Acceptance, in the form of a punch list.
(c) The City will conduct a re-inspection of the punch list items within when requested by the Contractor, in writing, with assurances that the punch list requirements have been met.
Any charges by a Consulting Engineer/Architect hired by the City to do repeat re - inspection of the punch list may be recovered from the Contractor. (d) The contractor shall provide a final payment request with lien releases (if applicable) in a format acceptable to the City.
(e) The as-built drawings and all record documents and shall be provided to the City by the Contractor including but not limited to, equipment operation and maintenance manuals, copies of warranties, shop drawings, product data, etc. Record documents shall be properly identified and organized into binders.
8.22 Final Completion - After the Contractor has received the Certificate of Substantial Completion along with the punch list, and has completed the items identified as necessary for project closeout, the Engineer will make a determination as to if the work is fully completed and in accordance with the Contract Documents. If so, the Engineer will recommend final acceptance to the City Council.
Should it become necessary, due to developed conditions, for the City to occupy any portion of the work, or any part of any structure or equipment, before the contract is completed or accepted, such occupancy shall not constitute an acceptance of any part of the work, unless so stated in writing by the City.
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8.23 Fi nal Acceptance – Final acceptance by the Engineer will be considered after the work has been fully completed. A Notice of Completion will be filed with the County Recorder once Final Acceptance has been made.
8.24 Risk of Loss - The Contractor shall be r esponsible for the charge, care and protection of the project and shall bear all risks of injury or damage to the work, materials or equipment delivered to the site, by any means including fire, earthquake, wind, storm or other action of the elements, vandalism, or loss by theft, from the date of Notice to Proceed to the date of the filing of the Notice of Completion by the Engineer. The Contractor shall rebuild, repair, restore and make good all injuries or damage to any portion of the work, and shall bear the entire expense thereof, except such injuries or damages that are caused by riot, insurrection, acts of the Federal or State Government, or a public enemy in time of war.
8.25 Use of Improvements During Construction - The City reserves the right to take over and utilize all or part of any completed facility or appurtenance. Such action by the City will not relieve the Contractor of responsibility for injury or damage to said completed portions of the improvement res ulting from use by public traffic, from the action of the elements or from any other cause attributable to the Contractor’s operations or negligence. The Contractor will be required to restore such portions of the improvement before final acceptance. Nothing in this Section shall be construed as relieving the Contractor from full responsibility for correcting defective work or materials.
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SECTION 9 —RESPONSIBILITIES OF THE CONTRACTOR
9.01 Contractor’s Responsibility for the Work - The Contractor shall supervise, coordinate, and direct the work using Contractor’s best skill and attention. Contractor shall have control over and be solely responsible for construction means, methods, techniques, sequences, procedures, and the coordination of all portions of the work in accordance with the terms of the Contract Documents until the completion and final acceptance of the work by the City. The Contractor shall furnish and maintain in good condition all equipment and facilities as required for the proper execution and inspection of the work. Such equipment and facilities shall meet all requirements of applicable ordinances and laws.
The Contractor shall rebuild, repair, restore and make good all injuries, damages, re -erections and repairs occasioned or rendered necessary by causes of any nature whatsoever, excepting only acts of God and none other, to all or any portions of the work, excepting as otherwise stipulated.
9.02 Contractor’s Responsibility for Subcontracted Work - The City will deal directly with, a nd make all payments to the Contractor only. The Contractor shall be responsible for the coordination of all trades, subcontractors, and suppliers engaged upon the work. Neither the City nor the Engineer will undertake to settle any differences between the Contractor and his/her subcontractors.
All persons engaged in the work, including subcontractors, will be considered as employees of the Contractor. The Contractor will be held responsible for their work and shall be responsible to the City for acts and omissions including those by their respective agents and employees.
When subcontracted work is not prosecuted in a manner satisfactory to the Engineer, the Contractor shall be notified to take corrective action within a specified time. If timely correction is not made, then upon receipt by the Contractor of written instructions from the Engineer, the Subcontractor shall be removed immediately from the work and shall not be reemployed.
9.03 Superintendent - The Contractor shall employ, and provide a written letter designating a superintendent and/ or representative and all their contact information. The superintendent and/or representative shall be present on the job site whenever work is in progress to coordinate all work with the City and neighboring property owners, and who shall be available by phone twenty-four (24) hours per day, seven (7) days a week up to the Final Acceptance of the work by the City. A backup representative may also be provided. A joint venture shall designate only one Superintendent.
City approval of the Superintendent is required prior to starting work. The City reserves the right to request an appropriately qualified replacement of the Superintendent any time during construction of the project. Contractor shall provide the Engineer with the Superintendent’s telephone number, along with an after-hours emergency contact number of a responsible person who shall correct hazardous situations, should they occur, during times other than the normal working hours.
Directions and information given to the Superintendent shall be considered as having the same effect as if delivered to the Contractor and the Superintendent shall have full authority to execute the same and to supply materials, tools and labor without delay, and who shall be the legally appointed representative of the contractor. Contractor shall be liable for the faithful observation of any instructions delivered to him/her or to his/her appointed representatives.
9.04 Character of Workers - Contractor shall provide competent, fully qualified personnel to perform the work and shall at all times maintain good discipline and order among its employees and Subcontractors. Any employed person or Subcontractor who is found to be incompetent, intemperate, troublesome, disorderly or otherwise objectionable or who fails or refuses to perform his/her work properly and acceptably, shall be immediately removed from the work by the Contractor and shall not be reemployed. Such discharge shall not be the basis of any claim for compensation or damages against the City of San Carlos or any of its officers, employees or agents.
9.05 Laws to be Observed - The Contractor shall keep himself/herself fully informed of, and at all times observe and comply with all Federal, State and County laws, including those of CAL- OSHA; all
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municipal ordinances and regulations of the City of San Carlos; and all orders and decrees of bodies having jurisdiction over the work. The Contractor shall also cause all agents and employees engaged on the project to observe and comply with all such laws, and shall protect and indemnify the City of San Carlos and all officers, employees, and agents thereof connected with the work against any claim or liability arising from or based on the violation of any such law (a) Non-Discrimination – Attention is directed to Labor Code, Section 1735 which reads as follows: “No discrimination shall be made in the employment of persons upon public work because of the race, religious creed, color, national origin, ancestry, physical handicap, medical condition, marital status or sex of such persons, except as provided in Government Code, Section 12940 and every Contractor for public works violating this Section is subject to all the penalties imposed for a violation of this chapter.” (b) Alien Labor - The Contractor shall forfeit as penalty to the City of San Carlos fifty dollars ($50.00) for each alien with no permit to work in the U nited States of America (USA) knowingly employed in the contract, by him/her or by any Subcontractor under him/her upon any of the work herein mentioned, for each calendar day, or portion thereof, during which such alien is permitted or required to labor in violation of the provisions of the Labor Code and in particular Sections 1850 to 1854 thereof, inclusive. (a) Hours of Labor – Hours of labor shall be pursuant to Labor Code, Sections 1810.
Pursuant to Labor Code, Sections 1813, Contractor shall forfeit to the City, as a penalty, twenty-five dollars ($25.00) for each worker employed in the execution of this Agreement by Contractor, or any Subcontractor in violation of the terms of this Section or in violation of the provision of any law of the State of California. Such forfeiture amounts may be deducted from the contract sum. Contractor and each Subcontractor shall keep, or cause to be kept, an accurate record showing the actual hours worked each calendar day and each calendar week by each worker employed on the project, which record shall be kept open at all reasonable hours to the inspection of the City, its officers and agents, and to the inspection of the appropriate enforcement agency of the State of California. (d) Prevailing Wage – As identified in the Notice to Bidders, the work contemplated by this agreement is a public work subject to prevailing wages under Californi a Labor Code, Sections 1720 et. seq. The State of California Department of Industrial Relations has ascertained the general prevailing per diem wage rates in the locality in which the work is to be performed for each craft, classification, or type of worker required to perform the work. A schedule of the most recent general prevailing per diem wage rates made available to the City will be on file at the City’s principal facility office and will be made available to any interested party upon request. This prevailing wage rate schedule is provided by the City for Bidder’s information only and is not guaranteed by the City to be current. Contractor is obligated to verify all appropriate prevailing wage rates and pay those rates as required. By this referenc e the verified current schedule of prevailing wage rates is made part of the Contract Documents. Contractor shall pay not less than the prevailing per diem wage rates, as specified in the schedule and any amendments thereto, to all workers employed by Contractor in the execution of the work. Contractor shall cause all subcontracts to include the provision that all Subcontractors shall pay not less than the specified prevailing per diem wage rates to all workers employed by such Subcontractors in the execution of the work.
Contractor shall forfeit to the City, as a penalty, no more than fifty -dollars ($50.00) for each calendar day or portion thereof for each worker that is paid less than the specified prevailing per diem wage rates for the work or craft i n which the worker is employed for any portion of the work done by Contractor or any Subcontractor in violation of the provisions of the Labor Code, and in particular Sections 1770 to 1781 thereof, inclusive.
Such forfeiture amounts may be deducted from t he contract sum. Contractor shall also pay to any worker who was paid less than the specified prevailing per diem wage rate for the work or craft for which the worker was employed for any portion of the work, for each calendar day, or portion thereof, for which the worker was paid less than the specified prevailing per diem wage rate, an amount equal to the difference between the specified prevailing per diem wage rate and the amount which was paid to the worker.
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The City will not recognize any claim for additional compensation because of the payment by the Contractor for any wage rate in excess of prevailing wage rates set forth in the Agreement, including payment in excess of the prevailing wage for extra work paid by force account. The possibility of wage increases is one of the elements to be considered by the Contractor in determining the Contractor’s bid and will not, under any circumstances be considered as the basis of a claim against the City under the Agreement.
(e) Payroll Records - Pursuant to Labor Code, Sections 1776, Contractor and all Subcontractors shall keep an accurate payroll record, showing the name, address, social security number, job classification, straight time and overtime hours worked each day and week, and the actual per diem wages paid to each journeyman, apprentice, worker, or other employee employed in connection with the work. All payroll records shall be certified as being true and correct by Contractor or Subcontractors keeping such records; and the payroll records shall be provided to the City no later than three weeks after closing of payroll. The Contractor and all Subcontractors must also furnish electronic certified payroll records to the Labor Commisioner of the State of California, D epartment of Industrial Relations.
(f) Apprentice Program - Attention is directed to State of California Labor Code, Sections 3095, 1777.5, 1777.6, and 1777.7 and Title 8, California Code of Regulations, Section 200, and the applicable Sections that follow. Responsibility for compliance with these requirements lies with the Contractor. To ensure compliance and complete understanding of the law requiring apprentices, and specifically the required ratio thereunder, Contractor or Subcontractors should, where some question exists, contact the Division of Apprenticeship Standards, 425 Golden Gate Avenue, 4 th Floor, San
Francisco, California, 94102 or one of its branch offices prior to commencement of the work. In the event Contractor willfully fails to comply with this Section, it will be considered in violation of the requirements of the Contract.
Nothing contained herein shall be considered or interpreted as prohibiting or preventing the hiring by Contractor or Subcontractors of journeyworker trainees who may receive on- the-job training to enable them to achieve journeyworker status in any craft or trade under standards other than those set forth for apprentices.
(g) Safety Program – the Contractor shall conform to the rules and regulations pertaining to safety established by the California Division of Industrial Safety and to all requirements as set forth in the State of California Construction Safety Orders ( CAL-OSHA), and in particular, Article 3 of these Safety Orders, regarding Accident Prevention and safety meetings. Within ten (10) working days following the Notice of Award the Contractor shall provide a copy of the Contractor’s Safety Plan. The price paid for the plan is included in the various contract items of work and no additiona l compensation will be made therefore.
9.06 Permits and Fees – Unless otherwise stated in the Special Provisions, the Contractor shall procure all permits, registrations and licenses, including a City business registration, pay all charges and fees, and give all notices necessary for lawful prosecution of the work. All permits, registrations, licenses, and other authorizations shall be secured in sufficient time to prevent delays to the work. The Contractor shall comply with the provisions of said permits, licenses and other authorizations. The contractor shall submit satisfactory proof to the City, prior to issuance of the Notice to Proceed, that such permits, registrations or licenses are and will be in effect throughout the entire life of this contract. The contractor shall keep all permits, registrations and licenses posted on the job site.
For City Capital Improvement Construction Projects, the Contractor shall obtain a “No Fee” encroachment and/or building permit. Contractor shall coordinate through the Engineer to insure that all appropriate construction inspections occur.
9.07 Coordination and Cooperation - Construction work by utility companies or other Contractors may be needed or may be occurring simultaneously within or adjacent to the limits of work for this project. The Contractor shall coordinate and cooperate with all other Contractors and utility companies
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throughout the duration of this project to avoid delays and minimize interference and conflicts. Cooperation will be required in the arrangement for the storage of materials, and in the detailed execution of the work.
It is the Contractor’s responsibility to ascertain the nature of work by others, coordinate his/her work, and install, modify, and maintain traffic control as necessary to avoid interferences and delays on the construction activities. Failure of the Contractor to keep informed of the work progressing on the site and failure to give written notice of lack of progress or defective workmanship by others shall be construed as acceptance by the Contractor of the status of the work as being satisfactory for proper coordination with his/her own work.
Where the work of one trade joins or is on the other’s work, there shall be no lack of continuity or discrepancy when work is completed. In conforming one kind of work with another, marring or damaging other work will not be permitted. Should improper work of any trade be covered by another which results in damage or defects, the whole work affected shall be made good by the Contractor without expense to the City.
The City reserves the right to perform work or allow others to perform work, as necessary, within or adjacent to the limits of this project, at any time. If the Contractor or any of his/her Subcontractors or employees causes loss or damage to any separate Contractor on the work, the Contractor, by agreement or arbitration, if he or she deems it necessary, will settle any claim for such loss or damage. If such separate Contractor shall sue the City, on account of any loss so sustained, the City shall notify the Contractor, who shall indemnify and hold harmless the City against any loss or damage arising therefrom, including the cost and expense of defending any such suit.
If any portions of the work specified herein are to be installed in any right -of–way owned by the State, County, Municipality, or other public entities or public utilities, it shall be incumbent upon the contractor to familiarize described above will necessarily be subject to their inspection and approval before acceptance of these portions of the work by the Engineer. Any costs for inspection by agents other than those of the City shall be borne by the contractor. Where other agencies have jurisdiction over some portion of the work, and the requirements of the agencies are at variance with this specification, then that portion of the work shall be done in accordance with the requirements of the agency(ies).
The Contractor shall absorb in his/her bid all costs involved in coordinating his/her 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.
9.08 Use of Premises - The Contractor shall confine construction activities to the project limits; which shall consist of right-of-way, easements and/or property owned by the City of San Carlos. With prior approval of the Engineer, adjacent street right -of-way may also be utilized for day -to-day operations.
Unless approved by the Engineer, no storage of materials and equipment will be allowed to remain within the right-of-way during non-working hours, on the weekends, or during holidays.
Each day, after the completion of construction operations, unless otherwise approved by the Engineer, the project limits shall be secured and made accessible to the public. All excess materials and equipment not protected by approved traffic control devices (such as k-rails) shall be relocated to a staging area or demobilized. Trench spoils shall be off-hauled daily and open excavations shall be protected with steel plates.
Personnel of Contractor and Subcontractors shall not occupy, live upon, or otherwise make use of the project site during any time that work is not being performed at the project site, except as otherwise provided for in the Contract Documents for issues such as site security.
9.09 Construction Staging and Field Office - If additional space beyond the construction limits is necessary for staging, the Contractor shall, at his/her own cost and initiative, make special arrangements with neighboring property City(s) to secure a staging area for a field office and/or material and equipment storage. The staging area must be fenced, with screening, and shall be operated in a manner that minimizes the inconvenience to neighbors.
The Contractor is encouraged to negotiate side agreements with the property owners of such sites prior to submitting bids. Prior to occupying the staging area, the Contractor will be required to provide
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to the Engineer a copy of the agreement or temporary construction easement granted by the property owner. A written release from the property owners or City, holding the City harmless from liability, will also need to be provided. In addition to approval from the property owners, the Contractor may also need to secure a Use Permit from the City’s Planning Division.
9.10 Site Security - Contractor shall be responsible for the care and custody of work and the site, including all necessary security provisions, on a 24- hour per day basis throughout the entire term of the Agreement. The Contractor shall provide and maintain storage facilities and employ such measures as will preserve the specified quality and fitness of materials to be used in the work.
9.11 Construction Water – The Contractor is responsible for obtaining all water required for the project and shall work with, and obtain all permits from , the appropriate water purveyor prior to obtaining construction water. If hydrant water is to be used, the Contractor must first obtain a hydrant meter and pay all related expenses. Direct connections to hydrants without a meter are not allowed. If water trucks are used, they shall be installed with backflow prevention devices. The cost of water , including all associated fees, deposits or permits shall be incorporated into the various bid items and no separate payment shall be made. Water purveyors include:
California Water Service Company Mid-Peninsula Water District Bayshore District - Customer Center 3 Dairy Lane
341 North Delaware St. P.O. Box 129
San Mateo, CA 94401-1727 Belmont, CA 94002
M-F: 8 a.m. to 4:30 p.m. M- F: 8 a.m. to 4:30 p.m.
Tel.: (650) 558-7800 Tel.: (650) 591-8941
[email protected] midpeninsulawater.org
9.12 Project Site Maintenance – All work identified in this section shall be considered as part of the contract bid items, and no separate payment will be made thereof. (a) Disposal of Material - Unless otherwise shown on the plans or specified herein, all excess materials and materials removed from existing improvements shall become the property of, and be disposed by the Contractor. The Contractor shall be responsible for all costs associated with disposing all excess materials in a safe and legal manner. No material shall be placed on private or public property without prior approval from the City and the property owner. The Contractor shall not allow any refuse, excavated material, surplus concrete or mortar, or any associated washings, to be disposed upon paved streets, into manholes or into the City’s storm drain system.
Contractor shall establish a system for daily collection and disposal of waste materials from construction areas and elsewhere on the site. Contractor shall handle waste materials that are hazardous, dangerous, or unsanitary separately from inert waste by containerizing appropriately. Burning or burying of waste materials on site will not be permitted.
All materials removed from the existing improvements, which in the opinion of the Engineer have salvage value, shall be delivered to the City Corporation Yard at 1000 Bransten Road, San Carlos, or at any other site designated by the Engineer within the City and shall be considered as part of the contract bid items, with no separate payment will be made thereof.
(b) Cleanup and Dust Control – at all times during construction, including weekends and holidays, and throughout all phases of construction, including work suspensions and until final acceptance of the project, the Contractor shall keep the work site clean and free from rubbish, debris, and prevent the formation of an airborne dust nuisance.
Materials and equipment shall be removed from the site as soon as they are no longer necessary. Upon completion of the work and before final inspection, the entire site shall be cleared of equipment, unused materials, and rubbish so as to present a satisfactory clean and neat appearance.
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The Contractor shall abate dust nuisance by cleaning, sweeping, and sprinkli ng with water, those excavated areas of dirt or other materials which are prone to causing dust, within both the project site and the storage or staging area. If required or directed by the Engineer, the Contractor shall provide an approved water truck of large capacity with spraying capability and/or street sweeper.
The Contractor shall be required to apply water for dust control immediately during construction efforts and within one (1) hour after notification by the Engineer that an airborne nuisance exists. If dust control is not adequate, in the opinion of the Engineer, the Engineer will have this work performed by others and will deduct such cost from the total contract price.
All hauling trucks or other construction vehicles leaving the site shall be cleaned of mud or dirt clinging to exterior body surfaces or wheel rims before traveling on City streets outside the work limits. All trucks coming to or leaving the site with materials or loose debris shall be loaded in a manner, which will prevent t he dropping of materials or debris on City streets. Spillage resulting from hauling operations along or across any public traveled way shall be removed immediately.
When construction operations cause dirt to be deposited on public streets, the Contractor shall immediately remove such material. Streets shall be cleaned by street sweeping, rather than flushing, so as to prevent mud from entering the storm drain system.
Excess excavated material shall be removed from the site immediately. Sufficient material may remain for use as backfill if permitted by the specifications. Forms and form lumber shall be removed from the site as soon as practicable after stripping.
Failure of the Contractor to comply with the Engineer’s cleanup orders may result in an order to suspend work until the condition is corrected. No additional compensation will be allowed as a result of such suspension.
(c) Air Pollution Control - The Contractor shall not discharge smoke, dust, or any other air contaminants into the atmosphere in such quantity as will violate the regulations of any legally constituted authority.
(d) Noise Control - The Contractor shall make every reasonable effort to control noise generated as a result of construction to the satisfaction of the Engineer. Use of an air compressor, jackhammer or other loud, vibrating sound generating device shall be limited to operations between the hours of 8:00 a.m. and 6 :00 p.m. Monday thru Friday and between 9:00 a.m. to 5:00 p.m. on Saturday and Sunday, unless otherwise authorized by the Engineer.
(e) Vermin Control - At the time of acceptance, structures entirely constructed under the contract shall be free of rodents, insects, vermin and pests. Necessary extermination work shall be arranged and paid for by the Contractor as part of the contract work within the contract time and shall be performed by a licensed exterminator in accordance with requirements of governing authorities. The Contractor shall be liable for injury to persons or property and responsible for the eli mination of offensive odors resulting from extermination operations.
(f) Sanitation - The Contractor shall provide and maintain enclosed toilets for the use of employees engaged in the work. These accommodations shall be maintained in a neat and sanitary condition. They shall also comply with all applicable laws, ordinances and regulations pertaining to the public health and sanitation of dwellings and camps. (g) Wastewater - Wastewater systems shall not be interrupted. Should the Contractor disrupt existing sewer facilities, the Contractor shall immediately notify the Engineer, and the Contractor shall establish a plan, subject to the approval of the City, to convey the sewage in closed conduits and disposed of it back into the sanitary sewer syst em.
Sewage shall not be permitted to flow in trenches or be covered by backfill. (h) Temporary Light, Power and Water - The Contractor shall at his/her own expense furnish, install, maintain, and remove all temporary light, power, and water, including piping, wiring, lamps, and other equipment, necessary for the work. The Contractor shall not
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draw water from any water source, except to extinguish a fire, without first obtaining permission from the appropriate water utility company/agency. (i) Storm Water Pollution Control – All work shall conform to the National Pollutant Discharge Elimination System (NPDES) General Permit for Storm Water Discharges Associated with Construction and Land Disturbance Activities (Order No. 2009-0009- DWQ, NPDES No. CAS000002) ("General Permit"), and the NPDES Municipal Regional Stormwater Permit (MRP) (Order No. R2 -2015-0049, NPDES No. CAS612008). The Contractor shall implement all applicable San Mateo Countywide Water Pollution Prevention Program (SMCWPPP) measures and Best Management Practices (BMPs).
Failure to comply with the approved construction BMPs will result in the issuance of correction notices, citations and/or a stop work order.
The Contractor shall submit to the City a Stormwater Pollution Prevention Plan (SWPPP) or Water Pollution Control Plan (WPCP), prepared in compliance with all NPDES requirements. The SWPPP/WPCP prepared by the Contractor shall address how the Contractor will prevent materials from being rinsed or washed into the storm drain system and specify which BMPs will be implemented for preventing sediment and pollutant discharges into the storm water system. The Contractor shall provide for the construction of facilities which may be required to prevent, control, and abate water pollution.
All construc tion efforts shall be conducted in a manner which prevents the release of hazardous material or hazardous waste into the soil or groundwater, and minimizes the discharge of pollutants into the storm drain system. No pollutants will be allowed to enter the storm drainage system. The Contractor shall be responsible for containing and removing any waste from the Contractor’s construction operations using the appropriate BMP. The Contractor shall be responsible for cleaning catch basins of solid or liquid waste materials originating from the Contractor’s operation before this material migrates further into the storm drain system. Violation of this provision shall cause the City to issue a stop -work notice and take necessary action to require the Contractor to correct and comply with regulations. All costs related to the stop-work action and corrective work to come into compliance shall be fully borne by the Contractor.
Existing Drainage Conditions - If the work performed interferes with established drainage patterns, ample provisions shall be made by the Contractor to correct the interference.
The City may also direct the Contractor to take additional measures to be performed at the Contractor 's expense.
Illicit Discharge - No dumping or discharge of construction materials, debris, and hazardous materials will be permitted into the City's storm drainage system. In the event of any discharge, leakage, spill or emission of hazardous materials, Contractor shall promptly notify the City and shall clean all affected property. The Contractor shall indemnify, hold harmless and defend the City against all liability incurred as a result of any such discharge, leakage, spill or emission, regardless of whether such liability, cost or expense arises during or after the term of the permit.
9.13 Preservation of Property - The Contractor shall be responsible for the protection of public and private property adjacent to the work.
Due care shall be exercised to avoid damage to existing roadway improvements and facilit ies, adjacent property, roadside trees, lawn and shrubbery not designated for removal, pole lines, fences, signs, survey markers and monuments, buildings and structures, conduits, pipe lines under or above ground, sewer and water laterals, and any other improvements or facilities within or outside the limits of construction. As ordered and approved by the Engineer, the Contractor shall provide and install suitable safeguards to protect such objects from injury or damage. If such objects are injured or damaged by reason of the Contractor’s operations, they shall be replaced or restored, at the Contractor’s expense, to a condition as good as when the Contractor entered upon the work, or as good as required by the Contract Documents.
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Existing striping damaged during construction within and adjacent to the project site shall be replaced with thermoplastic. Partially damaged striping (such as what might occur trenching through a pavement legend), shall be replaced in their entirety.
Contractor shall preserve carefully bench marks, reference points, and stakes; in case of willful or careless destruction, he or she will be charged with the resulting expense of replacement and shall be responsible for any mistakes that may be caused by their unnecessary loss or disturbance.
Any survey monuments that are damaged or removed as part of the construction shall be replaced by the Contractor and a Record of Survey, as required by State law, shall be filed by a licensed Land Surveyor at the Contractor's expense.
The fact that any such improvement or facility is not shown upon the plans shall not relieve the Contractor of his/her responsibility under this Section. It shall be the Contractor’s responsibility to ascertain the existence of any underground improvements or facilities indicated on the plans, indicated by locating services, or as evidenced by facilities visible in the field.
Contractor shall protect his/her work, supplies and materials from damage due to the nature of the work, the action of the elements, trespassers, or any cause whatsoever which is under his/her control, until the completion and acceptance of the work. Neither the City nor any of the City's agents assume any responsibility for collecting indemnity from any person(s) causing damage to the work of the contractor.
9.14 Protection of Buried Utilities – When the Contractor's attention is directed to the existence of pipes, cables, culverts, and other underground structures and improvements which may or may not be shown on the plans , it is the responsibility of the contractor to ascertain the exact location of such underground utilities in advance of any digging operations so that they shall not be disturbed or damaged by him/her during the progress of the work. All expenses of whatever nature arising from such disturbance or replacement or repair thereof shall be borne by the contractor.
If the location of pipelines being installed by the contractor under this contract conflicts with the location of existing pipelines, contractor shall so notify the Engineer in writing. The Engineer will ascertain the location of the existing utility in question and may at his/her discretion relocate the pipeline being installed for the convenience of the contractor. It shall not be construed that the City or the Engineer is in any way required or obligated to locate or relocate pipelines to locations other than shown on the contract plans. If the Engineer relocates pipelines at the request of the contractor, the contractor shall bear all the expenses incurred in connection therewith.
9.15 Protection of Bridges - Contractor shall be responsible for any damage he or she may cause to bridges, culverts and road structures. he or she shall determine in advance the allowable safe load for each structure and, if necessary, provide special shoring and support at his/her expense.
9.16 Protection of Traffic Signal Facilities - The Contractor shall give at least seventy-two (72) hours advance notice to the Engineer before commencing any street work (such as pavement grinding or trenching) that may potentially damage any traffic signal detection loop wires or any other signal facility.
This requirement is in addition to any Underground Services Alert notifications. The City will then mark the underground traffic signal facilities.
The Contractor shall not proceed with any grinding, trenching or other underground work until it has been verified with the Inspector that signal facilities have been marked.
In the event that the Contractor's construction activities cause any failure of a traffic facility, it shall be repaired and be made fully operable within 24-hours of the damage occurring. In the event that such repair is not undertaken within this time limit, the City may repair the facility at the Contractor’s expense.
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9.17 Restoration of Adjacent and Existing Improvements - Contractor shall do all cutting, fitting, or patching of the work required to make all parts of the work come together properly with existing and adjacent conditions.
Unless otherwise provided, the Contractor shall repair or replace all existing improvements (e.g., curbs, sidewalks, driveways, fences, signs, utilities, street surfaces, structures, etc.) damaged or removed as a result of his/her operations. Repairs and replacements shall be at least equal to existing improvements, and shall match in terms of condition, finish and dimension to the satisfaction of the Engineer.
All Underground Services Alert (USA) markings, including the initial markings made by the Contractor and those markings placed by others in responseshall be removed at the Contra ctor’s expense when they are no longer required. Acceptable means of removal include sand blasting, high pressure washing, or other means approved by the Engineer.
All traffic signs and street signs within the limit of work necessarily removed during the various phases of operations shall be temporarily reset by the Contractor at or near the original location upon completion of each phase of construction operations. Prior to removal of all traffic control signs, the Contractor shall submit photographs of the site which show the existing location of these signs so that upon completion the photographs will aid in resetting the signs at or near their original location. Traffic control signs and street signs will be replaced upon completion of the work and the cost of removal and replacement shall be considered as part of the contract bid items, and no separate payment will be made thereof.
Rural type mail boxes shall be maintained by the Contractor in a manner satisfactory to the property owner and postal service, and the Contractor shall relocate the same as soon as possible to a permanent location in accordance with postal regulations and in a location acceptable to the property owner.
Any object to be removed and reused at other locations shall be removed with due care and delivered or stored at the project’s construction storage area, or if approved by the Engineer, at any other site designated by the Engineer within the City. Such objects may consist of street light poles, signal mast arms and other objects directed by the Engineer. Items not approved by the Engineer for reuse purposes, and without salvage value, shall become the property of the Contractor, to be disposed of at Contractor expense, in an acceptable manner.
9.18 Archeological Remains - If human and/or archeological remains are uncovered during excavation. All earthwork within one-hundred (100) feet of these materials will be stopped until a Coroner and/or professional archeologist (SCA) and/or the Society of Professional Archeology (SOPA) has had an opportunity to evaluate the significance of the find and suggest appropriate mitigation measures.
9.19 Access to Private Property - The Contractor shall schedule and perform operations so as to minimize disruption of access to private property. Prior to blocking access to any private driveway or parking lot entrance, the Contractor shall notify the resident s, business owner s or tenant s of pending closure and allow residents to remove vehicles. During non-working hours no driveway, house or parking lot shall be denied access to a public roadway.
The Contractor shall coordinate with the adjacent property owners and businesses and maintain vehicle and pedestrian access to their properties at all times. Temporary access ramps, fencing, or other measures shall be provided as needed.
9.20 Traffic Control and Public Convenience – The Contractor shall provide for safe movement of all vehicular, bicycle and pedestrian traffic through and around the construction operations with as little inconvenience and delay as possible. The Contractor shall have no amount of work under construction other than what he or she can properly prosecute with due regard to the rights and convenience of the public.
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Proper conveyance of vehicular traffic and pedestrians through the work area depends upon navigating under unexpected situations. The means of clarifying such conditions to the public include the Contractor’s use of signs, flagmen, pavement markings, barricades, lights, cones and delineators. No one standard sequence of signs or control devices will suit all conditions which may result from construction operations. Even for the same work, the conditions may vary from hour to hour, requiring adjustment and revisions of the traffic control in effect. The traffic control requirements specified herein are therefore intended to establish general principles to be observed in the control and regulation of traffic through and around the construction operations anticipated for this project. The requirements set forth in this Section represent the minimum traffic control requirements imposed and the Contractor shall be solely responsible for providing the full extent of tr affic control measures that are necessary. Only individuals trained in the principles of implementing traffic control and/or traffic control flagging shall be assigned that responsibility at the work site.
(a) Traffic Control Plan – The Contractor shall submit a Traffic Control Plan to clearly describe proposed traffic control measures. The plan shall be generally in accordance with the illustrations included in the “California Manual of Uniform Traffic Control Devices” and the “W ork Area Traffic Control Handbook”, (Building News Incorporated P.O. Box 3031, Terminal Annex, Los Angeles, CA 90051). The submittal shall consist of scaled drawings for each situation anticipated to be encountered, i.e., intersections, mid- block (each during working and non-working hours), etc. The drawings shall show signs, traffic control devices and flagmen as required.
The Traffic Control Plan shall be directed equally to the regulation and protection of non - vehicular traffic including pedestrians, bicyclists, joggers, skaters, skateboarders, etc.
The Contractor shall provide for the protection and separation of non- vehicular traffic from construction operations at all times. No work involving the implementation of traffic control shall begin until the Engineer has reviewed and has no exception to the traffic control plans. The Contractor may implement a revised Traffic Control Plan only with subsequent review with no exceptions by the Engineer.
(b) Traffic Control Devices - Traffic control devices shall be provided in sufficient quantities and types as required to provide safe and adequate traffic control. During hours of darkness, approved lights and/or flares shall be included, in proper working order, to illuminate signs and hazards and alert approaching traffic. Barricades shall be furnished and maintained along all open trenches in contact with traffic. No work may begin on any day or at any time before traffic control devices have been placed, test driven and, if required, adjusted and revi sed. All traffic control devices shall be placed in accordance with the Manual of Uniform Traffic Control Devices and the Contractor’s favorably reviewed traffic control plans. Locations of devices shall be adjusted to suit the conditions and circumstances of each detour situation. In all cases, signs shall be placed to most effectively convey their messages to approaching traffic.
The Contractor shall maintain all traffic control devices, at proper locations and in proper working order, at all times dur ing construction operations and whenever a hazard resulting from Contractor’s operations exists. The Contractor shall adjust and revise traffic control devices, placement, etc., to suit changing conditions around construction operations. Traffic control devices shall remain in place at all times, as required to alert approaching traffic of upcoming hazards. After hazards have been removed, all traffic control devices shall be removed. Temporary signs shall be removed or their messages covered.
Daily tra ffic control measures shall continue until cleanup activities have been satisfactorily completed and all of the Contractor’s equipment has been removed from the traveled way.
(c) Traffic Control Detours - The Contractor shall direct, divert and detour t raffic through, around and adjacent to construction operations in accordance with the traffic control plans specified in the Contract Documents or in accordance with the Contractor’s favorably reviewed traffic control plans.
1. Field Review of Detours - Immediately after traffic control devices have been placed, the detour shall be test driven by the Engineer or Inspector and the
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Contractor’s Superintendent. The test drive shall include approaches to the detour from each possible direction, and traverse the full length of each detour route. The Contractor shall adjust and revise all traffic control devices as determined to be required by the test drive and the test drive shall be repeated, if determined necessary by the Engineer or Inspector . The Contracto r shall provide additional traffic control devices as required to maintain the flow of traffic throughout construction operation.
2. Diverting Bicycle and Pedestrian Traffic – Whenever construction operations obstruct the flow of bicycle and pedestrian traffi c or present a hazard to bicycles and pedestrians, the Contractor shall take appropriate action to protect and separate bicycles and pedestrians from the work area. Such action may include placement of barricades between bicycles and pedestrians and the w ork areas, placement of warning signs, and provisions utilizing personnel as required to protect and maintain access for bicycles and pedestrians as conditions warrant.
3. Diverting Vehicular Traffic - Whenever construction operations obstruct the flow of vehicular traffic or present a hazard to vehicles operating in the vicinity of construction operations, the Contractor shall take appropriate action to warn, detour and otherwise protect approaching drivers and vehicles.
4. Flagmen - The Contractor shall employ flagmen as required for each specific detour and at all locations where barricades and warning signs cannot control the movement of traffic. A warning sign shall be placed ahead of the flagman reading: “Flagman Ahead.” The distance between the sign and the flagman should be based on the average traffic speed, allowing approximately fifty ( 50) feet for each ten (10) miles per hour. During hours of darkness, flagman stations shall be illuminated such that the flagman will be clearly visible to approaching traffic. Lights for illuminating the flagman station shall receive favorable review by the Engineer. The flagman shall wear a red or orange warning garment when flagging. Flagmen shall be provided with approved red flags or STOP/SLOW hand paddles, and two- way radios for communication. When flagging during hours of darkness, the flagman shall signal with a red light or flare and shall have a belt and suspender harness outside his/her garment fitted with reflectors or made from reflectorized cloth, unless the garment is well reflectorized in one of these ways.
5. Notice to Agencies - The Contractor shall notify the Engineer and all agencies having jurisdiction over the work, in writing, at least ninety -six (96) hours, excluding holidays and weekends, prior to instituting any lane closure or detour.
At the end of each workday, the Contractor shall inform the Engineer , Police Department and Fire Departments of the status of all detours, lane restrictions, or road closures. The Contractor shall cooperate and coordinate with the various parties involved in the collection and removal of trash and garbage, the transit providers, the U.S. Postal Service, and others, as necessary, in order to maintain existing schedules and services.
6. Emergency Vehicle Access Through Detours - During all detours and/or street closures the Contractor shall provide for the movement of emergency vehicles through the work area. It is essential that the Contractor’s work and equipment does not impede emergency access.
7. Night Detours - The Contractor shall not be permitted to maintain any lane closure or road closure during non -working hours w ithout first obtaining written approval from the Engineer. During non- working hours the Contractor shall restore travel lanes to their original alignment and configuration by means of placing temporary asphalt pavement or bridging with steel plates. The Contractor shall place “ROUGH ROAD” signs conforming to the Manual of Uniform Traffic Control Devices at uneven temporary pavement or bridging locations. See General Provisions, Section 9.18 (b), “Trench Safety Requirements”.
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8. Temporary Traffic Lanes – Temporary traffic lanes shall be at least ten ( 10) feet wide, or eleven ( 11) feet wide around curves. Provide an additional two (2) feet of clearance from curbs. The length of temporary lanes should be limited to the area under construction and the distance necessary to divert traffic. (d) Parking Restrictions - The Contractor shall post approved “No Parking” signs at all locations necessary to establish work areas and detour traffic. Signs shall read: “NO PARKING - CONSTRUCTION TOW-AWAY ZONE,” show t he actual day and hours of parking restriction and indicate the telephone number of the City’s Police Department or agency having jurisdiction. Signs shall be placed at least forty -eight (48) hours in advance of the restriction. The Engineer shall approve the location and duration of no parking limits and verify their placement. “No Parking” signs shall be removed when no work is under construction and must be reposted forty -eight ( 48) hours before the resumption of construction activities.
For any violation of “No Parking” signs by motorists, the Contractor shall contact and coordinate directly with the City’s Police Department for removal of vehicles in accordance with the California Vehicle Code. The Contractor shall also coordinate with the Police Department directly for enforcement and towing of parked vehicles.
9.21 Safety - The Contractor shall be solely responsible for initiating, maintaining, and supervising all safety precautions and programs in connection with the performance of the work. The Contractor’s responsibilities shall specifically provide for the safety of persons involved in the project, other persons who are affected by the performance of the work, the work in place, materials and equipment to be incorporated in the work, the project site, and adjoining property.
The services of the City in conducting inspection or construction review of the Contractor's performance is not intended to include review of the adequacy of the Contractor's work methods, equipment, bracing, shoring or scaffolding, or safety measures, in, on, or near the construction site.
Safety vests and personal protection equipment shall be worn by the Contractor, all subcontractors and other personnel when working or present on the site. Hard hats shall be worn w hen working around earthmoving or any heavy construction equipment or during any overhead construction work.
Payment for performing all work necessary to provide safety measures shall be included in the bid items for which safety measures are required and no additional compensation will be made. (a) Safety Orders – The Contractor shall have at the work site, copies or suitable extracts of:
Construction Safety Orders, Tunnel Safety Orders, and General Industry Safety Orders issued by the State Division of Industrial Safety. The Contractor shall comply with provisions of these and all other applicable laws, ordinances, and regulations. (b) Trench Safety Requirement - As required by California Labor Code, Section 6705 and in addition thereto, for any excavation of any trench or trenches five (5’) feet or more in depth, the Contractor shall submit to the Engineer for review, a detailed plan showing the design of shoring, bracing, sloping, or other provisions to be made for worker protection from the hazard of caving ground during the excavation of such trench or trenches.
Structural calculations prepared, stamped and signed by a Registered Engineer licensed to practice in the State of California shall accompany the plan to verify the structural safety and adequacy of the sheeting, shoring and bracing to be used on the project. No such plan shall allow any shoring, sloping or a protection system less effective than that required by the Construction Safety Orders of the State Division of Occupational Safety and Health.
The maximum length of open trench shall be three-hundred (300) feet or the distance that pipe can be installed in a single day as determined by the Engineer. Trenches shall be backfilled and covered with two (2) inches of cutback (in paved areas) or bridged with tack-welded steel plates at the end of each workday. Cutback shall be placed around plate edges to provide a smooth transition and to secure against displacement.
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As soon as possible under the provisions of these specifications, the Contractor shall backfill all excavations and restore to usefulness all improvements that existed prior to the start of construction.
(c) Confined Space Entry Program (CSEP) - Entry into permit-required confined spaces as defined in Section 5157, Titl e 8, California Code of Regulations ( CCR) may be required as a part of the work. All manholes, tanks, vaults, pipelines, excavations, or other enclosed or partially enclosed spaces shall be considered permit -required confined spaces until the pre -entry procedures demonstrate otherwise. The Contractor shall be responsible for implementing, administering, and maintaining a confined space entry program (CSEP) in accordance with Sections 5156, 5157, 5158, Title 8, CCR and shall implement such a program prior to performing any work in a permit -required confined space. A copy of the permit shall be available at all times for review by the Contractor and City personnel at the work site.
Prior to starting work, the Contractor shall prepare and submit its comprehensive CSEP to the Engineer. The CSEP shall address all potential physical and environmental hazards and contain procedures for safe entry into confined spaces, including, but not limited to the following:
1. Training of personnel
2. Purging and cleaning the space of materials and residue
3. Potential isolation and control of energy and material inflow
4. Controlled access to the space
5. Atmospheric testing of the space
6. Ventilation of the space
7. Special hazards consideration
8. Personal protective equipment
9. Rescue plan provisions
The Contractor’s CSEP submittal shall also include the names of the Contractor’s and Subcontractor’s personnel assigned to the project who will have CSEP responsibilities, their CSEP training, their specific assignment and their responsibilities in carrying out the CSEP.
Payment for implementing, administering, and providing all equipment and personnel associated with the CSEP shall be included in the bid items for which the CSEP is required and no additional compensation will be made.
(d) Hazardous Conditions: Contractor’s Responsibility for Precautions - Contractor agrees that if, during the progress of the work, a hazardous condition is identified which involves a risk of bodily harm to any person or a risk of damage to any property, the Contractor will take such special precautions as shall be necessary to make the progress of the work safe under such condition. Conditions may result from, but are not limited to, the use of specified materials or equipment, the loc ation of the work, the condition of the site, the kind or method of construction, or the manner in which any of the work is required to be done. The Contractor agrees to assume the sole responsibility for determining whether any such hazardous condition exists or will be created during the course of the work. (e) Use of Explosives – Explosives may be used only when authorized in writing by the Engineer, or as otherwise stated in the Specifications. Explosives shall be handled, used, and stored in accordan ce with all applicable regulations. No explosive material shall be transported to, stored or utilized on the site without written permission of Engineer. All blasting work and handling of explosives on the site shall be done only by qualified persons who possess a valid permit. The Engineer’s approval of the use of explosives shall not relieve the Contractor from liability for claims caused by blasting operations.
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(f) Special Hazardous Substances and Process – Materials that contain hazardous substances or mixtures may be required on the work. A Material Safety Data Sheet as described in California Code of Regulations, Section 5194 shall be requested by the Contractor from the manufacturer of any hazardous products used and submitted to the Engineer.
Hazardous material usage shall be accomplished with strict adherence to California Division of Industrial Safety requirements and all manufacturer warnings and application instructions listed on the Material Safety Data Sheet and on the product container label.
The Contractor shall notify the Engineer if a specified product cannot be used under safe conditions.
9.22 Patent Fees or Royalties - All fees, royalties or claims for any patented invention, article or method that may be used upon or in any manner connected with the work under this contract shall be included in the price bid for the work and the contractor and his/her sureties shall protect and hold the City, together with all the City's officers, agents, servants and employees, harmless against any and all demands made for such fees or claims brought or made by the holder of any invention or patent and, before the final payment is made on account of this contract, contractor shall, if requested by the Engineer, furnish acceptable proof of a proper release from all such fees or claims.
Should the contractor, his/her agents, servants or employees, or any of them, be enjoined from furnishing or using any invention, article, material or appliance supplied or required to be supplied or used under this contract, the contractor shall promptly substitute other articles, materials or appliances, in lieu thereof, of equal efficiency, quality, finish, suitability and market value and satisfactory in all respects to the Engineer. Or, in the event that the Engineers elects in lieu of such substitution to have supplies and to retain and use any such invention, article, material or appliance as may be required by the contract to be supplied – in that event, the contractor shall pay such royalties and secure such valid li censes as may be requisite and necessary for the City, the City's officers, agents, servants and employees, or any of them to use such invention, article, material or appliance without being disturbed or in any way interfered with by any proceeding in law or equity on account thereof. Should the contractor neglect or refuse to make the substitution promptly, or to pay such royalties and secure such licenses as may be necessary, then, in that event, the Engineer shall have the right to make such substitution or the City may pay such royalties and secure such licenses and charge the cost thereof against any monies due the contractor from the City or recover the amount thereof from him/her and his/her sureties notwithstanding final payment under this contract may have been made.
9.23 Advertising - The names of the Contractor or Subcontractors, with their addresses and the designation of their particular specialties, may be displayed at the job site on removable signs only if written approval is received from the Engineer. Commercial advertising material shall not be attached to, or painted on the surfaces of, any buildings, fences, canopies, or barricades.
9.24 Antitrust Claims – Attention is directed to Public Contract Code, Section 7103.5 which provides: “In entering into a public works contract or a subcontract to supply goods, services, or materials pursuant to a public works contract, the Contractor or Subcontractor offers and agrees to assign to the City all rights, title, and interest in and to all causes of action it may have under Section 4 of the Clayton Act (15 U.S.C. Sec 15) or the Cartwright Act (Chapter 2, commencing with Section 16700, of Part 2 of Division 7 of the Business and Professions Code), arising from purchases of goods, services, or materials pursuant to the public works contract or subcontract. The assignment shall be made and become effective at the time the City tenders final payment to the Contractor, without further acknowledgement by the parties.”
9.25 Audit and Examination of Records – The City and entities and agencies designated by the City, shall have access to, and the right to audit and examine at no additional cost, all of the Contractor’s project related data including but not limited to, books, estimates, records, contracts, bid cost data, Subcontractor and supplier job cost data, change orders, correspondence, instructions, drawings, receipts, vouchers, purchase orders, notes, computations, daily logs, and memoranda relating to the work. Pursuant to Government Code, Section 8546.7, the Contractor shall preserve all such records and will be subject to examination and audit by the State Auditor, at the request of the City, for a period of three (3) years after final payment under the Agreement.
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9.26 Notice of Entrance - Before entering any private property the contractor shall give the owner, tenant and inspector a minimum of forty-eight (48) hours written notice.
9.27 A dditional and Emergency Protection - Wherever, in the opinion of the Engineer, the contractor has not taken sufficient precautions for the safety of the public or the protection of the works to be constructed under this contract, or of adjacent structures or property which may be injured by processes of construction on account of such neglect, and whenever, in the opinion of the Engineer, an emergency shall arise and immediate actions shall be considered necessary in order to protect personal and property interest, whether public or private, then and in that event, the Engineer, with or without notice to the contractor, may provide suitable protection to the said interests by causing such work to be done and such material to be furnished as shall provide such protection as the Engineer may consider necessary and adequate.
The cost and expense of such work and material so furnished shall be borne by the contractor and if the same shall not be paid on presentation of the bills therefore, then such costs shall be deducted from any amounts due or to become due the contractor. The performance of such emergency work under the direction of the Engineer shall in no way relieve the contractor from any damages which may occur during or after precaution has been taken by the Engineer.
9.28 Placing Portions of Work in Service - Portions of the work may be placed in service as completed if desired by the City . Contractor shall give proper access to the work for this purpose. Such use and operation shall not constitute an acceptance of the work and the work, and the contractor shall be liable for defects due to faulty construction until the entire work under the contract is finally accepted.
9.29 R ights -of-Way - The City will provide all rights-of-way and easements in or beneath which pipes and other structures will be constructed by the Contractor under this contract. If through the failure of the City to acquire or clear title to rights-of-way, the Contractor sustains loss which could not have been avoided by the judicious handling of forces and plant, there shall be paid to the contractor such amount as the Engineer may find to be a fair and reasonable compensation for such part of the C ontractor's actual loss as the Engineer deems unavoidable. Actual loss shall be understood to include no items other than necessary payments, idle time of men, idle time of equipment, cost of extra moving of equipment, and cost of longer hauls, with no allowance in any case for overhead or profit. If performance of the Contractor's work is delayed as a result of the failure of the City to acquire or clear title to rights -of- way, a commensurate extension of time will be granted.
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SECTION 10 - MEASUREMENT AND PAYMENT
10.01 Measurement of Quantities for Unit Price Work - Materials and items of work which are to be paid for on the basis of measurement shall be measured in accordance with the methods stipulated in the particular sections of the Contract Documents involved. Unless specifically stated otherwise in this contract, no extra measurement(s) according to local custom of any kind shall be allowed in measuring the work under this contract; only the length, area, solid contents, number, weight, or time in standard units, as the case may be, shall be considered as specified.
Unless otherwise specified, quantities of work shall be determined from measurements or dimensions in the horizontal planes. Stationing shall be along the street centerline, lengths of sanitary sewers, storm drains and water lines shall be measured as the horizontal distances from center to center of structures, rounded to the nearest foot, and lengths of all return radii and curb data shall be measured along the face of curb. Volumetric quantities shall be the product of the mean area of verti cal or horizontal sections and the intervening horizontal or vertical dimensions. Measurements shall be in accordance with U.S. Standard Measures. A pound is an avoirdupois pound. A ton is two -thousand (2,000) pounds avoirdupois. The unit of liquid measure is the U.S. gallon.
When payment is to be made on the basis of weight, the weighing shall be done on certified platform scales or, when approved by the Engineer, on a completely automated weighing and recording system. The Contractor shall submit to the Engineer with duplicate licensed Weighmaster’s certificates showing the actual net weights. The City will accept the certificates as evidence of the weights delivered.
10.02 Bid Items - Should any bid item be eliminated in its entirety, payment will be made to the Contractor for actual costs incurred, in connection with such eliminated contract work, and for costs incurred prior to the date of the Engineer’s written notification eliminating such work. The actual costs to be paid to the Contractor shall be computed in the same manner as if the work were to be paid on a force account basis. No compensation will be made to the Contractor, in any case, for loss of anticipated profits. Increased or decreased scope involving a change order will be paid as stipulated in the change order.
The estimated value of work performed, for lump sum bids or lump sum bid items will be determined from the schedule of values, to be prepared by the Contractor and presented at the preconstruction meeting. Elements of work on the schedule of values shall be separated into groupings appropriate for the project. The Technical Specifications may be used as a guide for establishing these groupings. Move-in costs, bond and insurance costs, and submittal preparation costs can be included in the schedule of values under a separate mobilization line item. This line item shall not exceed five - percent (5%) of the contract’s value. Overhead and profit shall not be allowed as a line item, but shall be prorated over other items of work.
10.03 Bid Quantities - The quantities listed in the Bid Schedule for each bid item do not govern final payment. Payments to the Contractor will be made only for the actual quantities of contract items constructed in accordance with the plans and specifications. If upon completion of the construction, the actual quantities show either an increase or decrease from the quantities given in the bid schedule, the contract unit prices will still prevail.
Payment will not be made for materials wasted or disposed of in a manner not called for under the contract. This includes rejected material not unloaded from vehicles, material rejected after it has been placed and material placed outside of the plan lines. Unless otherwise provided, no payment will be made for materials delivered to the site but not incorporated in the work. Such quantities will not be included in the final pay quantities. No compensation will be allowed for the disposal of rejected or excess material.
When the estimated quantity for a specific portion of work is designated on the Bid Schedule as a “Final Pay Quantity”, the estimated quantity specified shall be the final quantity for which payment for such specified portion of the work will be made, regardless of the actual quantity constructed, unless the
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dimensions of said portions of the work shown on the plans are revised by the Engineer. If such dimensions are revised and such revisions result in an increase or decrease in the quantity of such work, the final quantity for payment will be revised by the amount represented by the change. The estimated quantity for any portion of the work designated as a F inal Pay Quantity shall be considered as approximate only and no guarantee is made that the quantity, which can be determined by computations, based upon the details and dimensions shown on the plans, will equal the estimated quantity. No allowance will b e made in the event that the quantities based upon computations do not equal the estimated quantities. Final pay quantities will be designated on the Bid Schedule with the letter (F) and shall only apply to the corresponding portions of work specifically designated on the plans. Any portion of work not designated as a final pay quantity will be measured and paid for as specified under other provisions of the Contract Documents.
10.04 Progress Payments – On or about the 25th day of each month may be designated as the date which would terminate each working month for the purpose of making progress payments.
The Contractor's request for a progress payment shall be submitted under cover of the Request for Progress Payment form approved by the Engineer. The Request for Progress Payment form shall be complete and properly executed by the contractor, and have, as attachments, the items listed on the form.
The Contractor shall, on the date established, prepare and submit a progress estimate to the City for work accomplished during the previous working month, based on the various contract bid items and the unit bid prices. Invoices shall include amounts previously paid, itemized retention and any deductions or additions authorized by change order. Consultation with the Engineer may be necessary to determine the amount of work accomplished.
The first progress payment will not be made until the following submittals have been provided and accepted: list and schedule of submittals, B aseline Construction Schedule, schedule of values (if applicable), SWPPP. Subsequent progress payment requests will not be accepted unless accompanied by the progress payment cover letter, an updated baseline or revised schedule, a certification that the record drawings have been updated as of the date of the invoice.
Upon receipt of a progress payment request, the City shall, within ten (10) working days, determine if the request is proper, and if disputed the City will return the progress payment to the Contractor along with a written document setting forth the progress payment request’s shortcomings.
Following receipt of an undisputed and properly submitted progress payment request, the City shall authorize payment within thirty (30) calendar days.
Contractor may request partial payment for materials delivered to the site but not yet incorporated into the work (materials on hand). To receive consideration for payment of materials on hand, the Contractor shall provide the Engineer with a list of such materials at least five (5) working days prior to submitting the monthly estimate of amount earned for work completed. At the Engineer’s sole discreti on, up to seventy -five-percent (75%) of the estimated value of materials on hand may be considered for payment, subject to the following:
(a) Only materials which have received favorable review of shop drawings will qualify. (b) Eligible materials mus t be delivered and properly stored, protected, and maintained in a manner favorably reviewed by the Engineer, at the job site or at a bonded warehouse. (c) The Contractor's actual net cost for the materials must be supported by paid invoices to suppliers or other documentation requested by the Engineer. (d) Materials delivered to the site less than thirty (30) days prior to their scheduled incorporation in the work shall not qualify.
(e) Partial payments for materials on hand shall not be deemed to be final payment for the material nor relieve the Contractor of his/her obligations under the Contract. (f) Partial payments for materials on hand shall be subject to retention.
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From each progress estimate, five percent (5%) will be deducted and retained by the City, and the remainder of the amount due, less the amount of all previous payment will be paid to the Contractor provided all work invoiced has been completed and approved by the Engineer.
The Engineer may withhold or nullify, the whole or any part of any payment to such extent as may be necessary to protect the City from loss on account of any of the following:
(a) Defective or vandalized work not remedied,
(b) Damage to the City or another Contractor,
(c) Claims filed, or reasonable evidence indicating probable filing of claims, (d) Stop notices, or failure of the Contractor to make payments properly to subcontractors or laborers or suppliers, in which case 125% of the stop notice amount shall be withheld until a release form is received,
(e) A reasonable doubt that the contract can be completed for the balance unpaid, (f) Reasonable evidence that the work will not be completed within the contract time and that the unpaid balance of the contract sum would not be adequate to cover the City’s liquidated damages assessed in accordance with the Agreement for the anticipated delay,
(g) Failure of Contractor to maintain, update and submit record documents, schedules or other submittals as required by the Contract Documents, (h) Performance of work by Contractor without properly processed shop drawings; (i) Any other failure of Contractor to perform its obligations under the Contract Documents.
The Contractor may elect to receive one hundred percent (100%) of payments due under the contract from time to time, without retention of any portion of the payment by the City, by depositing and maintaining securities of a value equivalent to the retention amount with the City in accordance with the provisions of Public Contract Code, Section 22300. Such securities, if deposited by the Contractor, shall be valued by the City’s Administrative Services Director, whose decision on valuation of the securities shall be final.
Contractor warrants that, upon submittal of an application for payment, all work for which payment has been previously issued by the City and received by the Contractor, shall be free and clear of all claims, stop notices, security interests, and encumbrances in favor of Contractor, Subcontractors, or other persons or firms entitled to make claims by reason of having provided labor, materials, or equipment relating to work.
The payment of progress payments by the City shall not be construed as an absolute acceptance of the work done up to the time of such payments and shall not constitute acceptance of defective work.
10.05 Retentions - The City shall retain five percent (5%) of the amount of each progress estimate, and the accumulation of said amounts so retained from the progressive payments to the extent unencumbered will be paid to the contractor in no less than thirty -five (35) days after the completion and acceptance by the Engineer and the City of the work done.
Upon contractor's request, City will make payment of funds withheld from progress payments pursuant to the requirements of Code Section 14402 if contractor deposits in escrow with the C ity, or with a bank acceptable to the City, securities eligible for the investment of State funds under Government Code Section 16430 or bank or savings and loan certificates of deposit, upon the following conditions:
(a) Contractor shall bear the expense of the City and the escrow agent in connection with the escrow deposit made.
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(b) Securities or certificates of deposit to be placed in escrow shall be of a value at least equivalent to the amounts of retention to be paid to the contractor pursuant to this section.
(c) Contractor shall enter into an escrow agreement satisfactory to the City, which agreement shall include provisions governing inter alia:
1. Amount of securities to be deposited.
1. Providing of powers of attorney or other documents necessary for the transfer of the securities to be deposited.
2. Conversion to cash to provide funds to meet defaults to termination of the contractor's control over the work, stop notices filed pursuant to the law, assessment of liquidated damages or other amounts to be kept or retained under the provisions of the contract.
3. Decrease in value of securities or deposit.
4. Termination of the escrow upon completion of the contract. (d) Contractor shall obtain the written consent of the surety to such agreement.
10.06 Final Payment - The City shall, prior to final acceptance, provide the Contractor with a copy of the final quantities for the various contract bid items and a summary of contract change orders for his/her review. All prior payments shall be subject to correction in determining the total contract sum.
The Contractor shall reply promptly in writing, to indicate either his/her concurrence or an explanation of possible discrepancies in the total contract sum.
The project will not be submitted to the City Council for acceptance until the Engineer and the Contractor concur with the totals of all quantities, costs, contract change orders and the total contract sum. Following concurrence, a semi -final payment will be made to the Contractor after deducting all previous payments and all amounts to be retained under the provisions of the contract. The retention payment shall be due and payable as a final payment after the expiration of thirty -five (35) days following the date of final acceptance of the work by the City Council.
If within the time fixed by law, a properly executed notice to stop payment is filed with the City, due to Contractor’s failure to pay for labor or materials used in the work, all money due for such labor or materials will be withheld from payment to the Contractor in accordance with applicable laws.
If releases are required, the Contractor shall pay or cause to be paid to Subcontractors the amount stated in the conditional releases within five (5) days after receipt of the semi -final payment, and shall promptly thereafter furnish evidence of such payment to the City.
The securities deposited by the Contractor will be released, providing that the following requirements of the contract have been fulfilled:
(a) Satisfactory completion of all construction work and written acceptance of said work by the City;
(b) The submission by the Contractor to the Engineer of all required stop notice releases, submittals, written guarantees, warranties, operating manuals, and other project related documentation;
(c) The return to the Engineer of all drawings and written specifications loaned to the Contractor during the construction period.
(d) The submission by the Contractor to the Engineer of record documents and a set of red - lined drawings showing the revisions to the original set of drawings which reflect the actual construction of the project for preparation of “Record Drawings”.
The Contractor agrees that the payment of the final amount due under the contract shall release the City of San Carlos from any and all claims or liability on account of all work performed under the
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contract, except those items previously made in writing and identified by the Contractor as unsettled.
Release of the final payment by the City shall not be construed as an acceptance of any defective work or acceptance of improper materials.
10.07 Acceptance - Contractor shall notify Engineer in writing of the completion of the work, whereupon the Engineer shall promptly satisfy them self by personal inspection as to the actual completion of the work in accordance with the terms of the contract. After receiving a written recommendation from the Engineer for acceptance of the work, City shall accept or reject the work; stating, if the work is rejected, the requisite conditions for acceptance. When the City accepts the work, they shall file a Notice of Complet ion with the County Recorder in the county where the work is located and shall promptly notify the contractor in writing of the recordation. Contractor warrants and guarantees that title to all work, materials and equipment accepted by the City will pass to the City free and clear of all liens, claims, security interests or encumbrances, and that no work, materials or equipment accepted will have been acquired by the contractor, or by any other person performing the work at the site or furnishing materials or equipment for the project, subject to an agreement under which an interest therein or encumbrances thereon is retained by the seller or otherwise imposed by contractor of such other person.
10. 0 8 Compensation for Extra or Omitted Work – Compensation for extra or omitted work shall be in accordance with Section 5.08, Change Orders.
10.09 C ompensation to City for Extension of Time - In case the work called for under this contract is not completed within the time limit stipulated herein, the City shall have the right, as provided hereinabove, to extend the time of completion thereof. If the time limit so be extended, the City shall have the right to charge to the contractor and to deduct from the final payment for the work the actual cost to the City of engineering, inspection, administration, legal and other overhead expenses which are directly chargeable to the extension of time. The cost of final surveys and preparation of the final estimate shall not be included in such charges.
10.10 Claims - The term “Claim” shall mean a written demand or assertion by the Contractor seeking, as a matter of asserted right, adjustment in the terms of the Contract Documents, payment of money, extension of time, or other relief with respect to the Contract Documents, or determination of other disputes or matters in question between the City and Contractor arising out of or related to the Contract Documents or the performance of the work, including claims alleging an error or omission.
A claim must be stated with specificity, including identification of the event giving rise to claim, the date of the event, and the asserted effect on contract sum and contract time. The claim shall include adequate supporting data. Adequate supporting data for a claim for an adj ustment of the contract time shall include scheduling data demonstrating the impact of the event on the completion of the work.
Adequate supporting data for a claim for an adjustment of the contract sum shall include a detailed cost breakdown of the items allowed, isolating labor, material, and equipment costs, and providing detailed quantities and unit prices for changed work. If the exact amount of a claim is not ascertainable at the time such claim is made, the supporting data currently available shall be submitted. Supplemental data supporting the exact amount of the claim shall be submitted as soon as available.
Notwithstanding the making of any claim or the existence of any dispute regarding any claim, unless otherwise directed by the Engineer, the Contractor shall not cause any delay, cessation, or termination in the performance of the work, including portions of the work pertaining to a claim.
10.11 Time Limit on Claims - Contractor shall submit any and all claims, together with adequate supporting data to the Engineer as soon as possible but not later than ten (10) working days after occurrence of the event giving rise to the claim, or the date the Contractor first recognized, or reasonably should have recognized, the condition giving rise to the claim, whichever is earlier. Contractor hereby expressly waives all claims not made within this time limit.
Contractor is expressly barred from asserting any claims of which the Contractor was aware, whether or not the exact amount of such claims was ascertainable, that is not submitted to the Engineer prior to the Contractor proceeding with the work.
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10.12 City Response to Claims - The Engineer shall promptly review claims. If additional supporting data is deemed necessary, the Engineer shall request such additional data within ten (10) working days after receipt of the claim. The Contractor shall furnish such additional data no later than ten (10) working days after receipt of the City’s request. The Engineer shall render a decision promptly, but in any event, within thirty (30) working days after the receipt of the claim or the receipt of additional supporting data. If the amount of the claim is in excess of $50,000, the aforesaid thirty (30) working day period shall be sixty (60) working days. Failure of the Engineer to render a decision within the aforesaid thirty (30) or sixty (60) working day period shall be deemed a decision denying the claim and the last day of such period shall be the date of such decision. The decision of the Engineer shall be final and binding unless appealed in accordance with the General Provisions, Section 10.15 , “Appeal of the Engineer’s Decision”.
10.13 Appeal of Engineer’s Decision - If Contractor disputes the Engineer’s decision of a claim, the Contractor shall, within thirty (30) calendar days of the decision, make a written appeal of the decision to the Engineer. The written appeal shall include all supporting data upon which the Contractor requests the City to modify its decision, including all documentation transmitted between the Contractor and the Engineer on the underlying claim. The Engineer shall make a good faith effort to resolve the claim prior to final completion of the Project. In the event the claim is not resolved prior to final completion, the Contractor’s claim shall be heard by the Director of Public Works prior to recommending final acceptance to the City Council. The Contractor’s administrative remedies under the Contract Documents shall be exhausted after the decision of the Director of Public Works is rendered. In case of disagreement with the decision of the Director of Public Works, the Contractor may pursue the resolution of the dispute by presenting a formal claim to the City.
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SECTION 11 - GUARANTY
11.01 Contractor’s Guaranty - Prior to final acceptance, the Contractor shall warrant and guaranty to the City that all work is in accordance with the Contract Documents and is not defective.
The guaranty shall be accompanied by a warranty bond for ten percent (10%) of the final contract sum, which shall warrant the quality of the work for a period of two (2) years after acceptance. The guaranty and warranty bond shall be in accordance with the Agreement Forms furnished in the Contract Documents.
11.02 Correction of Defective Work During the Guaranty Period - If within two (2) years after the date of City Council acceptance, or such longer period of time as may be prescribed by laws or regulations or by the terms of any applicable special guaranty required by the Contract Documents, any work is found to be defective, the Contractor shall promptly without cost to the City and in accordance with the City’s written instructions, either correct such defective work or if it has been rejected by the City, remove it from the site and replace it with non-defective work.
If the Contractor does not promptly comply with the terms of such instructions within ten (10) working days after written demand by the City, the City may have the defective work corrected. The City may also correct defective work immediately in cases of emergency where delay would cause serious risk of loss or damage. All direct, indirect and consequential costs of correcting defective work (including but not limited to fees and charges of engineers, architects, attorneys and other professionals) shall be absorbed by the Contractor.
The Contractor shall remove from the Project site portions of the work and materials which are not in accordance with the Contract Documents and which are neither corrected by the Contractor nor accepted by the City. If Contractor fails to pay the costs of such removal within ten (10) working days after written demand, the City may, without prejudice to other remedies, sell such materials at auction or at private sale, or otherwise dispose of such material. The Contractor shall be entitled to the proceeds of such sale, if any, in excess of the costs and damages for which the Contractor is liable to the City, including reasonable attorneys’ fees and expenses and compensation for the City’s services and expenses.
The City shall have the option, at its sole discretion and by notice to the Contractor, to accept defective work as defined in Section 4.18 – “Acceptance of Defective Work. “
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Special Provisions 447 Hillcrest Wall Replacement Project Page SP-1 Project No. C2203
SPECIAL PROVISIONS
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Table of Contents
1. DESCRIPTION OF WORK ................................................................................................................. 6
2. LOCATION .......................................................................................................................................... 6
3. QUALIFICATION OF BIDDERS .......................................................................................................... 6
4. PORTABLE CHANGEABLE MESSAGE SIGN (PCMS) ..................................................................... 6
5. DAYS & HOURS OF OPERATION ..................................................................................................... 6
6. CONTROL OF WORK ........................................................................................................................ 7
7. SEQUENCING AND ORDER OF WORK ........................................................................................... 7
8. STAGING AREA ................................................................................................................................. 7
9. FURNISHED MATERIALS .................................................................................................................. 7
10. NOISE CONTROL........................................................................................................................... 7
11. PROTECTION OF TREES .............................................................................................................. 8
12. TIME OF COMPLETION AND LIQUIDATED DAMAGES .............................................................. 8
13. LICENSES AND PERMITS ............................................................................................................. 8
14. “NO PARKING” SIGNS ................................................................................................................... 9
15. SAFETY AND HEALTH REGULATIONS ....................................................................................... 9
16. SAFETY OF PERSONS AND PROPERTY .................................................................................... 9
17. PROTECTION OF EXISTING INSTALLATIONS .......................................................................... 10
18. CONTRACTOR’S PLANT AND EQUIPMENT .............................................................................. 10
19. WATER ......................................................................................................................................... 10
20. POWER ......................................................................................................................................... 10
21. DUST CONTROL .......................................................................................................................... 11
22. CLEANUP ..................................................................................................................................... 11
23. CONSTRUCTION AND DEMOLITION DEBRIS ........................................................................... 12
24. CLEARING AND GRUBBING ....................................................................................................... 12
25. HAUL ROUTES – HOLLY STREET EAST OF EL CAMINO REAL PROHIBITED ...................... 12
26. SANITATION FACILITIES ............................................................................................................ 12
27. ARRANGEMENTS FOR TEMPORARY CONSTRUCTION FACILITIES ..................................... 13
28. PROTECTION AND RESTORATION OF EXISTING IMPROVEMENTS ..................................... 13
29. EXISTING UTILITIES .................................................................................................................... 13
30. UTILITY COORDINATION ............................................................................................................ 14
31. OBSTRUCTIONS .......................................................................................................................... 15
32. OWNER / CONTRACTOR MEETINGS ........................................................................................ 15
33. NOTIFICATION OF RESIDENTS AND MERCHANTS: ................................................................ 16
34. STORM WATER POLLUTION PREVENTION ............................................................................. 16
35. TRAFFIC CONTROL .................................................................................................................... 17
36. CONSTRUCTION SCHEDULE ..................................................................................................... 19
37. STREET SWEEPING .................................................................................................................... 19
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38. PROTECTION OF PUBLIC SAFETY............................................................................................ 19
39. DAILY WORK REPORTS ............................................................................................................. 19
40. SUBMITTALS ................................................................................................................................ 19
41. RECORD DRAWINGS .................................................................................................................. 20
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Special Provisions 447 Hillcrest Wall Replacement Project Page SP-6 Project No. C2203
SPECIAL PROVISIONS
These Special Provisions contain project specific requirements pertaining to the work, and as such, shall take precedence over the General Conditions portions of these Specifications. All costs associated with satisfying the requirements in these Special Provisions shall be included in the Contractor’s bid price and no additional compensation shall be made.
1. DESCRIPTION OF WORK
In general, the Contractor shall furnish all labor, materials, equipment and services necessary to complete the project as further described in the “Instructions to Bidders” of these Specifications.
2. LOCATION
Work to be done under this contract is at 447 Hillcrest Road, San Carlos, CA 94070 as shown on the project plans.
3. QUALIFICATION OF BIDDERS
The work required in this project is specialty construction requiring a specialty contractor who is highly knowledgeable and experienced in the fabrication and installation of soil nail wall s. The Contractor performing the work shall submit proof of three (3) projects within the last five (5) years on which the Contractor has successfully installed soil nail walls. A brief description of each project with the owner’s name and phone number shall be included.
4. PORTABLE CHANGEABLE MESSAGE SIGN (PCMS)
Portable Changeable Messages Signs (PCMS) shall be placed a minimum four (4) weeks prior to the start of construction at a minimum of 100 feet from the project limits. PCMS signs shall display “EXPECT DELAYS <<DATE>> TO <<DATE>> BETWEEN 8AM AND 5PM”.
5. DAYS & HOURS OF OPERATION
The Contractor shall restrict construction activities to the following hours:
Schedule of Working Hours within Public Right of Way
Construction Location Working Days Working Hours
Residential/Local and
Collector
Monday through Friday 8:00 a.m. to 4:00 p.m.
Downtown San Carlos Monday through Friday 8:00 a.m. to 11:30 a.m. and 1:30 p.m. to 4:00 p.m.
Arterial Monday through Friday 9:00 a.m. to 3:00 p.m.
No work shall be performed on Saturdays, Sundays, or designated legal holidays unless otherwise designated below.
Exceptions may be made, at the Engineer’s discretion, to allow work at other times and on other days if required for the Contractor’s operations. In such cases, the Contractor shall
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have an alternate work schedule reviewed and authorized by the Engineer pr ior to commencement of work.
Activities outside of those hours shall not generate objectionable noise, dust, or inconvenience to the public. Regular working days are from Monday through Friday except City legal holidays unless exception is granted by the City Engineer.
Contractor to coordinate with nearby schools that may be affected by improvements and plan working hours to accommodate school’s schedule when in session. Contractor shall note that these areas may experience higher volumes of traffic during student drop-off and pick-up, and shall adjust working hours to minimize any delays or disruption to traffic.
6. CONTROL OF WORK
The Contractor shall as the first order of work coordinate with all residents and businesses seventy-two (72) hours in advance of any work.
The Contractor shall use only chalk -based marking paint for all construction information painted on the street, sidewalks, or any other visible surface.
7. SEQUENCING AND ORDER OF WORK
The Contractor shall submit a work sequencing plan for Ci ty review and approval for all phases of construction that includes but is not limited to below:
• Work shall be performed in stages to minimize inconveniences to property owners. • Work shall be conducted in a sequence that facilitates safety and traffic for pedestrians and vehicles.
8. STAGING AREA
The City has not designated a staging area for this project. Should a staging area be desired, the Contractor shall be responsible for securing such an area along with any and all permits and permissions that may be necessary from the City and/or private property owners. Proof of concurrence shall be provided to the City upon request. Any fencing or other protective means (if required or employed by the Contractor) shall be at the contractor’s expense.
9. FURNISHED MATERIALS
No materials will be provided by the City for installation by the Contractor.
10. NOISE CONTROL
The Contractor shall submit documentation showing that the construction equipment is equipped with the manufacturer’s standard noise control equipment, or with an equally effective replacement that meets the manufacturer’s specifications.
Construction equipment and vehicles that require back -up alarms will be equipped with ambient-sensitive backup alarms. The use of jake brakes is prohibited and gasoline-
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powered construction equipment must be equipped with an operating muffler of baffle system.
11. PROTECTION OF TREES
The Contractor shall protect all existing trees at their drip lines, as shown on the Contract Documents. Temporary chain-link fencing or plastic construction fence are acceptable as protective barriers for tree protection purposes. Fencing shall be a minimum of five (5) feet high. Tree protection shall remain in place until all construction is complete. The City reserves the right to issue a stop-work notice if the tree protection devices are not installed or if the devices are not maintained.
No excavations within the tree protection area are allowed unless approved by the City and under the supervision of a licensed arborist. Any filling within the tree protection area shall be done in accordance with a detailed improvement plan approved by the City. No trimming, cutting or pruning of designated trees or roots can occur without approval by the City and supervision of a licensed arborist.
No storage of materials, disposal of paints, solvents or other noxious materials, operation of equipment, parked cars, unnecessary trenching, grading or compaction shall be allowed within the drip line of any trees.
12. TIME OF COMPLETION AND LIQUIDATED DAMAGES
The Time of Completion and Liquidated Damages shall be as described in the Instructions to Bidders.
13. LICENSES AND PERMITS
The Contractor and all subcontractors shall obtain a business license from the City of San Carlos and shall hold current licenses for the craft that the business is contracting for as required by Federal, State and Local laws.
The Contractor shall apply for any required permits, including encroachment and tree removal permits from the applicable agencies (with copies of the form and application submitted to the Engineer) within thirty (30) calendar days after the issuance of the Award of Contract Notification Letter and prior to beginning work in the affected areas. The Contractor shall submit copies of the permits, once issued, to the Engineer. No additional time schedule will be granted to the Contractor for any delays resulting from the processing of these permits.
If the construction work will require any street trees to be removed, Contractor shall obtain a “Street Tree Permit” from the City of San Carlos Department of Planning. Applications for Street Tree Permits are available by calling the Department of Planning at (650) 802- 4263. It is the Contractor’s responsibility to obtain fee information updates by calling the City Department of Planning.
A City of San Carlos “Hazardous Materials Storage System Permit” may be required for various construction activities. The Contractor is responsible for verifying to the requirements and fee schedule for storage of diesel fuel and/or hazardous materials by
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contacting the San Carlos Fire Department at (650) 802 -4300. It is the Contractor’s responsibility to follow any additional requirements as required by the 2016 California Fire Code.
14. “NO PARKING” SIGNS
The City will provide “NO PARKING” signs and the Contractor shall arrange for the pick-up of these signs a minimum seven (7) days prior to posting.
15. SAFETY AND HEALTH REGULATIONS
The Contractor shall comply with all applicable occupational safety and health standards, rules, regulations and orders established by Federal and State Agencies.
Specific attention is directed also to OSHA safety rules, regulations and precautions to be taken by the Contractor before entering sanitary sewer manholes, and other sanitation structures with respect to physical and chemical hazards that may be present.
The area of work shall at all times be protected by means of an adequate number of cones, barricades, flags or whatever means is necessary to properly and safely protect both vehicular and pedestrian traffic.
Any condition deemed to be an unsafe condition shall be immediately corrected by the Contractor. The failure of the City or its representatives to bring a potentially dangerous situation to the Contractor's attention shall not relieve the Contractor from his/her responsibility for providing a safe work area.
Prior to opening a manhole cover, a gas monitor will be used check the atmosphere of that structure for oxygen level and presence of explosive, flammable, or toxic gases. Gas levels (O2, H2S, CO, LEL) will be recorded on a log sheet. If unsafe levels are recorded, Contractor shall attempt to ventilate the manhole for a period of up to about 15 minutes and then recheck gas levels. If unsafe levels still remain, Contractor shall notify the City. Contractor will not perform any field work in a manhole in which unsafe gas levels are recorded.
Should a confined space entry be required to retrieve equipment or for any other reason, the Contractor shall follow OSHA Confined Space Entry Requirements.
16. SAFETY OF PERSONS AND PROPERTY
The Contractor shall take all reasonable precautions for the safety of, and shall provide all reasonable protection to prevent damages, injury or loss to: All employees, City personnel, residents on the project, and all others who may be affected thereby;
1. All the work and all materials and equipment to be incorporated therein, whether in storage on or off the site, under the care, custody or control of the Contractor or any of the Contractor’s subcontractors; and
2. The work of the City or other contractors.
The Contractor shall give all notices and comply with all applicable laws, ordinances, rules,
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regulations and lawful orders of any public authority bearing on the safety of persons or property or their protection from damage, injury or loss.
The Contractor shall erect and maintain, as required by existing conditions and the progress of the work, all reasonable safeguards for safety and protection, including posting danger signs and other warnings against hazards, promulgating safety regulations, and notifying owners and users of adjacent utilities.
The Contractor shall designate a Site Safety and Health Officer who is a responsible member of the Contractor’s organization and whose duty shall be the prevention of accidents. The Contractor shall submit the name of the Site Safety and Health Officer to the Engineer in writing. The Site Safety and Health Officer shall be responsible for preparation of a Health and Safety Plan.
The Health and Safety Plan shall detail the Contractors safety committee(s), safety rules, safety training, enforcement procedures, incentives, accident procedures and investigations, inspections, safety equipment and maintenance, hazardous materials (i.e. asbestos pipe) handling procedures, emergency action plan(s), alcohol and drug policies, confined space entry procedures, certification program and emergency retrieval procedures, 911 and emergency rescue services within jurisdiction of the work area, health providers and hospital emergency near the work site.
17. PROTECTION OF EXISTING INSTALLATIONS
Where applicable, when a portion of work will occur within a public easement located on privately owned property, all work shall be confined to areas within easements. The Contractor will be required to correct or replace without delay any and all damage to existing landscaping structures and equipment resulting from his/her operation at no extra cost to the City.
18. CONTRACTOR’S PLANT AND EQUIPMENT
The Contractor shall at all times be responsible for the security of his/her plant and equipment. The City will not take any responsibility for missing or damaged equipment, tools or personal belongings.
19. WATER
Water for use during construction shall be furnished by the Contractor and all costs incurred including the water use, meter charges, meter/backflow preventer deposit, vehicles and containers needed in transporting water to the job site shall be paid by the Contractor. The Contractor’s attention is directed to Section 9.11 of the General Provisions for additional information.
20. POWER
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All power for and in connection with work to be done under this contract shall be furnished and maintained by Contractor. The Contractor’s attention is directed to Section 9.12(h) of the General Provisions for additional information.
21. DUST CONTROL
The Contractor shall furnish all labor, equipment and means required and shall carry out effective measures wherever and as often as necessary to prevent its operation from producing dust in amounts damaging to property or causing nuisance as defined by the Engineer.
The Contractor shall be responsible for any damage resulting from any dust originating from its operations.
The dust abatement measures shall be continued until the Contractor is relieved of further responsibility by the Engineer.
The use of water shall not be permitted as a substitute for sweeping or other methods of dust control. Only dry sweeping is allowed.
Contractor shall sweep daily. The work area shall be left in a neat and presentable condition at the end of each workday.
22. CLEANUP
Through all phases of construction, including suspension of work and until final acceptance of the project, the Contractor shall keep the worksite and other areas used by it in a neat and clean condition, and free from any accumulation of rubbish and debris.
Contractor shall properly dispose of all excess earth, concrete, AC and debris off job site and clean up the work area at the end of each workday. The work area shall be left in a neat and presentable condition.
The Contractor shall keep its haul roads free from dirt, rubbish, and unnecessary obstructions resulting from its operations. Care shall be taken to prevent spillage on haul routes. Contractor shall obtain all required truck route permits. Any such spillage shall be removed immediately and the area cleaned by the Contractor.
Disposal of all rubbish and surplus materials shall be off the site of construction, at the Contractor’s expense, all in accordance with local codes and ordinances governing locations and methods of disposal, and in conformance with all applicable safety laws, and the requirements of the OSHA Safety and Health Standards for Construction.
The Contractor is advised that the disposal of solid waste, sewage, industrial waste, or other polluted waters into the public storm drain system is prohibited. Any fines or penalties levied against the City or Contractor for illicit discharges to the storm drain system as a result of the Contractor’s operation are the sole responsibility of the Contractor.
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If the Contractor exceeds the number of days assigned to this contract, the Contractor shall continue to clean the area. When street cleaning is not performed to the satisfaction of the Engineer, the Engineer may have the area cleaned by City crews, and any incurred costs shall be deducted from the Contractor’s progress payments.
23. CONSTRUCTION AND DEMOLITION DEBRIS
The City has an ordinance requiring that debris from construction and demolition activities be reused, recycled and/or salvaged so that it doesn’t end up in a landfill. The Contractor shall provide sufficient evidence (weight tickets or other documents) to verify that some of debris is being recycled, reused and/or salvaged to the satisfaction of the Engineer.
24. CLEARING AND GRUBBING
The work shall include, but is not limited to, removal of the following: PCC valley gutter and all other existing obstructions so designated on the plans, or as required by the Engineer or the Standard Specifications. The Contractor shall remove PCC valley gutter to the limits as shown on the plans, or as directed by the Engineer, by sawcutting. Any and all pavement damaged by the Contractor shall be saw -cut and removed as directed by the Engineer.
Slurry from sawcutting shall be cleaned up by wet/dry shop vacuum.
All cleared and grubbed materials shall be hauled off and disposed outside of the right- of- way at a suitable location and in a lawful manner by the Contractor.
Unless shown on the plans, no trees shall be removed. Trees, limbs, and roots within the project area which interfere with the Contractor's operations may be trimmed, with authorization from the Engineer. Tree trimming shall only be performed by a qualified arborist or tree surgeon. Prior to any trimming being performed, the Contractor shall submit to the Engineer, for review, the qualifications of the proposed arborist or tree surgeon. Any tree roots one inch or greater in diameter which have to be removed or are damaged during construction operations shall be sawcut evenly and shall be treated with a heavy coat of commercially available water base asphalt emulsion sealing compound. If roots are to be left exposed for an extended period of time, all roots shall be covered immediately with two (2) layers of burlap or equivalent material and soaked regularly with water to ensure that all roots are kept moist for the duration of exposure. No tree shall be trimmed or removed without a permit from the Planning Department.
25. HAUL ROUTES – HOLLY STREET EAST OF EL CAMINO REAL PROHIBITED
The section of Holly Street between Old County Road and Industrial Road is politically sensitive as a residential area and is NOT TO BE USED as a Haul Route. Contractor shall therefore direct trucks not to use the Holly 101 Interchange when heading to and from the site. Trucks shall use Ralston Avenue or Brittan Avenue for freeway access.
26. SANITATION FACILITIES
The Contractor shall provide and service temporary sanitary facilities (porto-potties ) and hand washing stations for the entire duration of the work at each site. Portopotties and hand washing stations shall be provided in ADA accessible locations and be accessible to the public at all times. The location shall be at the direction of the City Engineer.
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27. ARRANGEMENTS FOR TEMPORARY CONSTRUCTION FACILITIES
The Contractor shall be responsible for the allocation of space for temporary field offices and structures (if necessary) furnished by itself or its subcontractors; monitoring the use of temporary utilities; verification that adequate services are available to comply with requirements for work and climatic conditions; and the administration of traffic and parking controls.
The Contractor is advised that there may be insufficient area within the construction zone to provide parking, staging for material and storage of equipment. Coordinate locations for any off-site parking, staging and storage locations with the City during the pre-construction conference.
28. PROTECTION AND RESTORATION OF EXISTING IMPROVEMENTS
The Contractor shall submit video DVDs of the job site to the Engineer, for review, prior to the start of construction, for the purpose of providing a record of existing conditions. Only DVD format and new DVDs shall be used. Each DVD shall be labeled and dated appropriately. The DVD shall provide a view encompassing the entire project area, for all construction activities including at a minimum, the proposed excavation areas and contractor’s staging area, with sufficient clarity and scope to the satisfaction of the Engineer. The Contractor shall submit these DVD with a written log noting any existing defects or irregularities. The log shall also state the location (by station), date, and time the DVDs were made. Upon receipt by the Engineer, the DVDs shall become the property of the City.
If the Contractor plans to drive sheeting, the Contractor shall video inspect nearby structures prior to driving the sheeting. This video inspection shall be included in the site DVDs above, and shall be accompanied by a similar log which notes street address and existing defects or irregularities.
The Contractor shall be responsible for the protection of public and private property adjacent to the Work and shall exercise due caution to avoid damage to such property.
The Contractor shall repair or replace all existing improvements which are not designated for removal (e.g., street sections, curbs, gutters, driveways, fences, walls, structures, landscaping, etc.) which are damaged or removed as a result of its operations. Repairs and replacements shall be at least equal to existing improvements, and shall match them in finish and dimensions.
Any damages to the private properties will be restored to the satisfaction of the property owners/Engineer within seven (7) days of the damage(s).
Damages within the public right of way will be restored to the satisfaction of the Engineer after work on that particular block is completed.
29. EXISTING UTILITIES
The Contractor shall notify Underground Service Alert (U.S.A) at 1-800- 642-2444 for field location of all utilities 48 hours prior to any excavation. In addition, the Contractor shall contact the Railroad Call Before You Dig (CBUD) at 1-800-336-9193 for fi eld location of
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utilities when work is within the railroad tracks a minimum of forty -eight (48) hours prior to any work.
The Contractor shall be responsible for verifying the presence of utilities within the limits of work, as well as any changes in the l imits that are made to accommodate the project, protecting all utilities including but not limited to traffic signal conductors, signal interconnect communication, and fiber optic cables that may be affected by construction activities (e.g., clearing and grubbing, excavation, trenching, etc.), and notifying the Engineer in writing of any conflicts prior to beginning any excavation.
The Contractor shall pothole to verify the location and/or elevation of existing utilities as marked by Underground Service Al ert (U.S.A.) within the limits of work. The Contractor shall work with utility companies and inspectors to protect existing utility lines. The Contractor shall notify the Engineer three (3) working days in advance of the potholing operation. Once the utili ties are exposed, the excavation shall not be backfilled until the Engineer has inspected and taken measurements of the utilities.
Unless otherwise indicated on the plans, a pothole shall have a maximum length of six (6) feet, maximum depth as indicated on the plans or as directed by the Engineer, and the width dimension shall be as required by the Contractor with authorization of the Engineer.
The Contractor will protect and assume liability for all existing or newly installed structures and lines from damage by his/her forces during the construction period from the date of Notice to Proceed and the date of Final Acceptance.
All repairs of apparent or discovered utility facilities will be accomplished by the respective utility owners. The Contractor mus t coordinate with the utility companies to rewrap and/or repair their utility. All exposed existing telephone, gas, water, electrical and other public utility facilities will receive an envelope of twelve-inches (12”) of sand.
All painted markings including USA and CBUD markings, marks placed by the Contractor, and marks placed by the City’s survey crew on street pavement, curbs, gutters and sidewalks shall be completely removed by the Contractor prior to completion of the project.
All cost incurred to complete this work shall be deemed included in other items of work and no additional payment will be made thereof.
30. UTILITY COORDINATION
All relocations of apparent or discovered utility lines (e.g., AT&T, PG&E, SJWC, etc.) shall be accomplished by the forces of the appropriate utilities. The Contractor shall notify the appropriate utility at least forty-eight (48) hours in advance of working in the vicinity of any utilities in the project area.
Existing utilities shown on the plans are for information only and their locations are approximate. The Contractor shall assume full responsibility for the location of all existing utilities, whether or not shown on the plans, prior to the commencement of any construction activity (e.g., excavation, clearing & grubbing, etc.) which may damage any existing utilities.
Furthermore, the Contractor shall protect and assume liability for all existing utilities, whether or not shown on the plans, and any newly ins talled structures and lines from
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damage by contractor’s forces for the duration of the construction period (from the date of Notice to Proceed until the date of Final Acceptance).
The Contractor must allow utility companies to rewrap their utilities. All exposed existing or new telephone, gas, water electricity or other public utility facilities shall receive an envelope in all directions of twelve-inches (12”) of sand surrounding said utility(s) within the backfill area. This envelope shall be placed by the Contractor. All utilities must be supported by the Contractor when trench is opened.
31. OBSTRUCTIONS
The City shall not be responsible for any impact to the Contractor of any restrictions that may be caused by the work of other agencies, or the requirements thereof.
In the event that gas, electricity, telephone, water or other utility facilities are encountered, the Contractor shall immediately notify the Engineer and make the necessary coordination to have these structures (vaults, manholes, risers, valves, etc.) removed, relocated, and/or adjusted as necessary by the respective utility company unless specified in these Technical Specifications.
The storm and sanitary manholes, water valves, and monument covers shall be adjusted to grade by the Contractor as specified in these Technical Specifications. The Contractor shall also notify and coordinate with utilities to raise and/or adjust vaults, cabinets, etc. to grade.
The Contractor is required to cooperate with forces engaged in utility work and shall schedule and conduct his/her own work in such a manner as to avoid any unnecessary delay or hindrance to the work of the utility companies.
If the Contractor causes damage to Traffic Signal Communication Cable(s), the Contractor shall replace at no cost to the City the complete run of Traffic Signal Communication Cable(s) to the next controller. No splicing of Traffic Signal Communication Cable(s) shall be allowed at pull box. No time extension shall be granted to re-pull/replace Traffic Signal Communication Cable(s).
32. OWNER / CONTRACTOR MEETINGS
A. PRE-CONSTRUCTION CONFERENCE: A Pre-construction Conference will be held at the San Carlos City Hall, 600 Elm Street, San Carlos, CA 94070 within ten (10) working days after the date the Notice to Proceed is issued at the time and date described in the Notice to Proceed.
The confer ence will address the scope of work and the Contractor's proposed construction schedule, traffic control and detour plan. At the Pre -construction conference the Contractor shall provide the following, in addition to the items specified in Section 8.09 of the General Provisions:
• The proposed construction schedule (for overall project), • Two-week look-ahead construction schedule,
• Proposed construction method
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• Draft of the notification letter to residents and merchants, • The proposed traffic control plan,
• Project submittals.
The meeting shall be attended by:
• Contractor's representative, superintendent and major subcontractors, • City's representative project manager and inspector,
• Design consultant team,
• Others as Appropriate.
B. WEEKLY CONSTRUCTION MEETINGS: : A weekly construction will be held at the construction site or at San Carlos City Hall, 600 Elm Street, San Carlos, CA 94070 as determined by the City Project Manager/Inspector. The weekly meetings will be held on a day and time mutually satisfactory to the City and Contractor ’s representative and/or superintendent.
33. NOTIFICATION OF RESIDENTS AND MERCHANTS:
The Contractor shall perform the following tasks prior to commencement of the construction work:
A. Prepare and leave at each location a notification letter two (2) weens and seventy- two (72) hours prior to the time of construction, stating nature of work and expected duration of construction activity affecting their property.
B. Include Contractor's telephone number for the purpose of taking inquiries and complaints.
C. Submit draft copy to City at Pre-construction conference.
D. Final format and wording of this letter shall be subject to approval of Engineer.
34. STORM WATER POLLUTION PREVENTION
Consistent with the requirements of the federal Clean Water Act, the Project is subject to storm water pollution prevention requirements, which include the implementation of a water pollution prevention plan and/or implementation of local storm water requirements, which prohibit the discharge of pollutants from the Project site.
All work shall conform to the National Pollutant Discharge Elimination System (NPDES) General Permit for Storm Water Discharges Associated with Construction and Land Disturbance Activities (Order No. 2009-0009-DWQ, NPDES No. CAS000002) ("General Permit"), and the NPDES Municipal Regional Stormwater Permit (MRP) (Order No. R2- 2015-0049, NPDES No. CAS612008). The Contractor shall implement all applicable San Mateo Countywide Water Pollution Prevention Program (SMCWPPP) measures and Best Management Practices (BMPs). Failure to comply with the approved construction BMPs will result in the issuance of correction notices, citations and/or a stop work order.
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The Contractor shall include in the SWPPP any applicable California Department of Transportation Construction Site BMP Fact Sheets, or an approved equivalent. The Contractor is responsible for furnishing, installing, constructing, inspecting, maintaining, removing, and disposing of the BMPs as necessary throughout the entirety of the project.
The Contractor shall inspect BMPs regularly, and correct improperly installed, damaged, or ineffective BMPs immediately. Site BMP inspections shall be performed in accordance with the approved SWPPP/WPCP, and at a minimum of two week intervals. Reports of each BMP inspection shall be provided to the City on a monthly basis.
Prior to the start of any field work, the Contractor shall prepare a Water Pollution Control Plan (WPCP), in accordance with the latest version of the California Department of Transportation "Water Pollution Control Program (WPCP) Preparation Manual" and template, or other approved template, for review and approval by the Engineer. The WPCP shall include, at a minimum, the selection of BMPs applicable to the project, and an erosion control plan detailing the locations on the project site where applicable BMPs will be implemented.
The Contractor shall include in the WPCP any applicable California Department of Transportation Construction Site BMP Fact Sheets, or an approved equivalent. The Contractor is responsible for furnishing, installing, constructing, inspecting, maintaining, removing, and disposing of the BMPs as necessary throughout the entirety of the project.
The Contractor shall inspect BMPs regularly, and correct improperly installed, damaged, or ineffective BMPs immediately. Site BMP inspections shall be performed in accordance with the approved SWPPP/WPCP, and at a minimum of two week intervals. Reports of each BMP inspection shall be provided to the City on a monthly basis.
35. TRAFFIC CONTROL
Construction shall be organized so as to cause the least possible inconvenience to traffic.
Traffic control shall comply with the latest Caltrans Standard Plans and traffic control devices shall be furnished, placed, and maintained in accordance with the latest version of Part 6, Temporary Traffic Control, of the California Manual on Uniform Traffic Control Devices (CA- MUTCD).
The Contractor shall provide all required signs, barricades, lights, high-level flag trees, arrow boards, and other devices.
No work shall be performed on Saturdays, Sundays, or designated legal holidays. Exceptions may be made, at the Engineer’s discretion, to allow work at other times and on other days if required for the Contractor’s operations. In such cases, the Contractor shall have an alternate work schedule reviewed and authorized by the Engineer prior to commencement of work.
General Requirements:
1. The Contractor’s attention is directed to Section 9.20 of the General Provisions for additional requirements.
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2. The Contractor shall submit a traffic control plan to the Engineer for review, including any requests for alternate work schedules or work hours:
3. No work may begin under contract until the Traffic Control Plan has been approved by the Engineer. Time required for review and approval of the Traffic Control Plan shall not constitute a basis for time extension.
4. The Contractor shall maintain temporary AC surface to provide safe and comfortable passage for pedestrian and vehicular traffic.
5. At the end of each day, all trench or access pit excavations shall be either backfilled in accordance with Section 1301-4, “Bedding and Backfill,” of these Technical Specifications, or covered with traffic rated non-skid steel plates. The steel plates shall be countersunk flush with the adjacent grade to provide a smooth surface if the plates are located within the traveled way of the road. Cutbacks shall be applied in gaps and/or at edges. Adjoining plates shall be tack-welded where the plates meet. Plates located outside of the traveled way shall be held in place by placing temporary asphalt around all edges.
6. The Contractor shall provide electric arrow board(s) for any lane closures and reductions, except for on residential streets.
Special Requirements:
1. The Contractor shall be responsible for providing and maintaining all temporary traffic control and safety devices, including all personnel necessary for effectively directing vehicular, pedestrian and bicycle traffic through the construction zone. The Contractor assumes sole and complete responsibility for the job and site conditions, including safety of all persons and property, from start until final acceptance of the project. Thi s requirement shall apply continuously twenty -four (24) hours per day and shall not be limited to normal working hours.
2. Streets shall not be closed unless authorized by the Engineer in writing at least seventy- two (72) hours prior to the requested date. If street closure is approved, Contractor shall notify the following forty-eight (48) hours prior to the street closure:
a. City’s project manager and inspector
b. City of San Carlos Police Department, (650) 802-4277 c. City of San Carlos Fire Department, (650) 780-7400
d. City of San Carlos Garbage, Recycling, and Tree Trimming Haulers e. Recology San Mateo County (650) 595-3900
f. SamTrans
g. Impacted Elementary, Middle, and High Schools
h. Impacted residents and businesses
3. If emergency or urgent street closures are required, the Contractor shall notify:
a. City’s project manager and inspector
b. City of San Carlos Police Department, (650) 802-4277 c. City of San Carlos Fire Department, (650) 780-7400
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4. If construction will obstruct a bus stop, the Contractor shall notify the SamTrans Operations Control Center seventy-two (72) hours in advance at (650) 508-6200.
5. Access for local residents and businesses and all private property shall be maintained at all times. Signs shall be placed in front of commercial and industrial driveways to allow continual access. At the end of each working day these streets shall be reopened to through traffic with proper barricades, warning devices and temporary striping. If these streets are closed, the Contractor shall proceed expeditiously and with consideration for public convenience from the start of work to its completion.
36. CONSTRUCTION SCHEDULE
The Contractor shall submit to the Engineer, for review, a construction schedule in Critical Path Method (CPM) format with accompanying bar chart setting forth the sequence in which construction will proceed. In addition, the Contractor shall submit an updated CPM schedule for review along with the monthly request for partial payment. The City may, at its sole discretion, withhold partial payment until an updated CPM schedule is submitted.
37. STREET SWEEPING
Street sweeping using a mechanical sweeper with vacuum capabilities shall occur, at a minimum, every Wednesday and Friday at the end of the working day. The Contractor shall clean and sweep roadways and on-site paved areas of all materials attributed to or involved in the work. In addition, the Contractor shall clean and sweep roadways as necessary to ensure that vehicle and pedestrian travel is not endangered by the presence of loose materials. Construction site entrances shall be kept free of these materials.
38. PROTECTION OF PUBLIC SAFETY
If the Contractor encounters a condition where public safety is threatened (such as, but not limited to, a pipe hole, pipe collapse, stoppage, blockage and/or eminent sewer spill) the City’s representative shall be notified immediately. Furthermore, the C ontractor shall provide a visual record of the section of line containing the condition within eight (8) hours to City. If the CCTV camera becomes lodged inside the sewer and cannot be retrieved, the Contractor shall inform the City immediately. It is the Contractor's responsibility to remove the camera and ensure that the sewer is not damaged and Sanitary Sewer Overflows (SSOs) do not occur.
39. DAILY WORK REPORTS
The Contractor shall provide the City Inspector with daily work reports at the beginning of each working day for a report of the previous working day. Contractor to coordinate with City to obtain form standard to conform to.
40. SUBMITTALS
The Contractor shall provide one electronic copy in PDF format of the construction submittals. Each submittal shall be numbered. Re-submittals shall include the original submittal number followed by a letter indicating the revision (i.e. “A” for the first revision, “B” for the second revision). Submittals shall be provided as required by the Contract
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Documents. The Contractor shall be responsible for conforming to the requirements of the specifications. The Contractor shall provide, at a minimum, the following submittals to the City within twenty (20) calendar days after the issuance of the Award of Contract Notification Letter and prior to beginning work.
Each submittal item shall include a signed cover sheet, of which a template will be provided by the City. The cover sheet shall be filled out completely and legibly.
41. RECORD DRAWINGS
Upon completion of the project, the Contractor shall provide an electronic and hard copy of the sewer maps provided to the Contractor at the start of the project with any red line changes to the system configuration that were identified in the field.
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BID ITEM DESCRIPTIONS
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BID ITEM DESCRIPTIONS
0-1.01 GENERAL
Base Bid item descriptions are included below.
It is the intent of the Proposal and this Contract Document that the bid for each lump sum or unit price item, as submitted, and as required by the Contract Documents. All costs in connection with the work, including labor, materials and equipment to fully complete the work, shall be included in the lump sum or unit price named in the Proposal. No item of work required by contract documents for proper and successful completion of the contract will be paid for in addition to the prices submitted in the Proposal. All work not specifically set forth in the Proposal as a pay item shall be considered a subsidiary obligation of the Contractor and all costs in connection therewith shall be included in prices shown in the Proposal.
Full compensation for conforming to the requirements in the Special Provisions (unless otherwise noted)) shall be considered as included in the contract prices paid for the various items of work involved and no separate payment will be made therefor.
0-1.02 MEASUREMENT AND PAYMENT
Lump sum bid items will be measured as a complete job, and are intended to cover payment for all work in connection with the item as indicated on the plans and as described throughout these specifications.
Unit price bid items will be measured as described in the bid schedule or specifications.
BASE BID items for this project are as follows:
1. MOBILIZATION
The contract lump sum price for “Mobilization” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in mobilization including remobilization, demobilization costs and efforts, obtaining all bonds, all Contractor-acquired permits, bonds, licenses, agreements, certifications, and public and age ncy notifications, door hangers; submittal and approval of initial and progress schedules and submittals; moving onto the site of all equipment, staff including obtaining and setting up of Contractor’s staging area/yard; furnishing and erecting all needed construction facilities, fencing, project signage; project security; preconstruction photographs and video recording of surface features; progress schedules and reports; contract meetings; and record drawings as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
2. TRAFFIC CONTROL
The contract lump sum price for “Traffic Control” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved including preparing typical and/or detailed traffic control plans, placing, adjusting and removing temporary traffic control measures, such as, but not limited to, flags, cones, barricades, flashing arrow boards, changeable message boards, crash barriers, signs, construction area signs, “No-Parking, Tow Away” signs, and flaggers (personnel dedicated to controlling and managing traffic); furnishing, installing and removing CIP project signs, traffic control signs both as required by the Contract
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Bid Item Descriptions 447 Hillcrest Wall Replacement Project Page BD-2 Project No. C2203 Drawings and as part of the approved traffic control plan; incidentals necessary for worker, pedestrian and traffic protection, including furnishing all equipment, materials and personnel associated therewith; providing traffic control for project work areas and duration of the project as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
3. SITE APPEARANCE
The contract lump sum price for “Site Appearance” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in maintaining a clean project site at all times, complete in place, as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be
allowed therefor.
The Contractor shall not allow the site of the work to become littered with trash and waste material, but shall maintain a neat and orderly condition throughout the construction period. The Engineer shall have the right to determine what is or is not waste material or rubbish, and shall have the right, but not the obligation, to determine the place and manner of disposal.
4. CLEARING & GRUBBING
The contract lump sum price paid for “Clearing & Grubbing” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved, complete in place, as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
5. LANDSCAPE RESTORATION
Contractor shall coordinate with the City and property owner for the layout and limit of landscape restoration. Landscape replacement shall be “in-kind” replacement with relatively the same size and dimensions of the plant that was removed or damaged or as directed by the Engineer. Grass replacement shall be sod that closely matches what was removed. Hydroseeding shall be in accordance with Section 21, “Erosion Control” of the State Standard Specifications.
Erosion control blankets shall be coconut fiber blanket. Contractor shall furnish and install erosion control blanket as shown in the plans. The preparation of the area and the installation of the coconut fiber blanket shall be in accordance with Section 3, “Geotextiles, Mats, Plastic Covers and Erosion Control blankets; SS-7 of the Caltrans Best Management Practices Manual (BMP).
Prior to the installation of the coconut fiber blanket the area shall be raked to remove all rocks and clods.
A Certificate of Compliance shall be furnished as specified in Section 6- 2.03C “Certificates of Compliance” of the State Standard Specification for the Coconut Fiber Blanket.
The contract price paid per square foot for “Landscape Restoration” shall include full compensation for furnishing all labor, materials, tools, equipment, performing all operations and incidentals, and for doing all the work involved in the placement of the coconut fiber erosion control blanket, restoring vegetation in-kind, hydroseeding, replacing any damaged irrigation in -kind, complete in place,
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Bid Item Descriptions 447 Hillcrest Wall Replacement Project Page BD-3 Project No. C2203 including installation as shown on the plans, as specified in the Standard Specifications and these Technical Provisions, and as directed by the Engineer.
6. STORM WATER POLLUTION CONTROL
The contract lump sum price for “ Storm Water Pollution Control” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved including but not limited to furnishing, installing, and maintaining all plant, labor, materials, tools, permits, permit fees, and equipment required for preparation, placement, implementation and maintenance of stormwater pollution prevention measures as outlined the National Pollutant Discharge Elimination System (NPDES) General Permit for Storm Water Discharges Associated with Construction and Land Disturbance Activities (Order No. 2009- 0009-DWQ, NPDES No.
CAS000002) ("General Permit"), and the NPDES M unicipal Regional Stormwater Permit (MRP) (Order No. R2 -2015-0049, NPDES No. CAS612008) ; implementing all applicable San Mateo Countywide Water Pollution Prevention Program (SMCWPPP) measures and Best Management Practices (BMPs); preparing The Water Pollution Control Plan (WPCP) in accordance with the latest version of the California Department of Transportation “Water Pollution Control Programs (WPCP) Preparation Manual” as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
7. UTILITY COORDINATION
The contract lump sum price for “Utility Coordination” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in coordination with utility companies for any potential utility conflicts, complete in place, as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
8. REMOVE & REPLACE SSCO BOX
The contract unit price per each for “ Remove & Replace SSCO Box ” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in removing & replacing the SSCO box, adjusting to grade, complete in place, as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
9. REMOVE, REPLACE & RELOCATE WATER METER BOX
The contract unit price per each for “Remove, Replace & Relocate Water Meter Box” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in removing, replacing & relocating the water meter box, adjusting to grade, complete in place, as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
10. EXTEND & RELOCATE STORM PIPE & RISER (4”
± DIA.)
The contract unit price per each for “ Extend & Relocate Storm Pipe & Riser (4” ± dia.) ” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved, including but not limited to, installing concrete pad, tying the storm pipe to valley gutter, complete in place, as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Bid Item Descriptions 447 Hillcrest Wall Replacement Project Page BD-4 Project No. C2203
11. REMOVE, REPLACE & RELOCATE MAILBOX
The contract unit price per each for “ Remove, Replace & Relocate Mailbox” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved, including installing temporary mailbox as necessary, removing, replacing & relocating the existing mailbox, complete in place, as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
12. REMOVE, REPLACE & RELOCATE SIGN POST
The contract unit price per each for “ Remove, Replace & Relocate Sign Post” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved, including but not limited to, removing, replacing & relocating the sign post, complete in place, as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
13. REMOVE & REPLACE W1-1 (R) SIGN
The contract unit price per each for “ Remove & Replace W1-1 (R) Sign” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in removing and replacing the sign, complete in place, as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
14. REMOVE & REPLACE W13-1P (15 MPH) SIGN
The contract unit price per each for “ Remove & Replace W13-1P (15 MPH) Sign” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in removing and replacing the sign, complete in place, as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
15. REMOVE & REPLACE IN PLACE PCC VALLEY GUTTER
The contract price paid per square foot for “Remove & Replace in Place PCC Valley Gutter” shall include full compensation for furnishing all labor, materials, tools, equipment and incidentals, and for doing all work involved in saw cutting, demolishing, removing the existing concrete valley gutter, removing existing asphalt concrete and base, protecting and incorporating existing pipe drains into the new works, preparing the subgrade, furnishing and compacting the aggregate base, doweling into the existing concrete, furnishing, placing and finishing concrete, and placing curing compound as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
16. SOIL NAIL WALL (EXPOSED HEIGHT 3.0’ TO 8.5’)
The contract item “Soil Nail Wall” will be measured in square foot of the shotcrete area, exposed above finish grade. The contract unit price per square foot for “Soil Nail Wall” shall include full compensation for furnishing all labor, materials, materials tests, field tests, tools, equipment, and incidentals and for doing all the work involved, including installing drainage panels and 4-in weep holes, rebars, soil nails, excavation and backfill, removing the sloughed material at base of slope along roadsi de, shot concrete, miscellaneous metals, structural shapes and hardware, constructing the soil nail wall , tying existing wall weep holes or outlet drains to wall drainage, complete in place, as specified herein, as shown on the Plans, as specified in the Specifications,
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Bid Item Descriptions 447 Hillcrest Wall Replacement Project Page BD-5 Project No. C2203 and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
17. ARCHITECTURAL FINISH
The contract item “ Architectural Finish” will be measured in square foot of the shotcrete area, exposed above finish grade. The contract unit price per square foot for “Architectural Finish” shall include full compensation for furnishing all labor, materials, materials tests, tools, equipment, and incidentals and for doing all the work involved to “sculpt” and color stain the finish surface of shotcrete wall, complete in place, as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the E ngineer and no additional compensation will be allowed therefor. The final product shall be similar to that of natural, fractured local bedrock (similar to existing wall).
END OF SECTION
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TECHNICAL SPECIFICATIONS
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TABLE OF CONTENTS
SECTION 011100 - SUMMARY OF WORK ......................................................................... 1 SECTION 013000 – SPECIAL PROJECT CONSTRAINTS ................................................ 6 SECTION 013100 – COORDINATION ................................................................................. 7 SECTION 013300 – CONTRACTOR SUBMITTALS .......................................................... 10 SECTION 014516 – QUALITY CONTROL ......................................................................... 18 SECTION 015050 – MOBILIZATION ................................................................................. 23 SECTION 015100 – TEMPORARY UTILITIES AND FACILITIES ..................................... 26 SECTION 015550 – TEMPORARY TRAFFIC CONTROL SYSTEMS ............................... 28 SECTION 015600 – PROTECTION OF EXISTING FACILITIES ....................................... 34 SECTION 020010 – SITE CONDITIONS ............................................................................ 40 SECTION 020030 – EXISTING UTILITIES AND UNDERGROUND STRUCTURES ........ 42 SECTION 021100 – SITE PREPARATION ........................................................................ 44 SECTION 024100 - DEMOLITION ...................................................................................... 46 SECTION 310513 – CLEARING & GRUBBING, EXCAVATION, AND EARTHWORK .... 53 SECTION 321123 – AGGREGATE BASE COURSES ...................................................... 62 SECTION 321313 – CONCRETE IMPROVEMENTS ......................................................... 66 SECTION 321723 – TRAFFIC STRIPING, PAVEMENT MARKERS, PAVEMENT MARKINGS AND SIGNAGE .............................................................................................. 72 SECTION 323200 – SOIL NAILS ....................................................................................... 79 SECTION 323201 – SHOTCRETE AND WALL DRAINAGE ............................................ 84 SECTION 332250 – SHORING AND TRENCH SAFETY .................................................. 93 SECTION 332315 – EXCAVATION AND BACKFILL ........................................................ 97
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-1 Project No. C2203
SECTION 011100 - SUMMARY OF WORK
PART 1 GENERAL
1.1 SUMMARY
A. The Contract Documents describe the Work to be performed under this Contract which includes, but is not limited to, providing all plant, tools, equipment, materials, supplies, and manufactured articles for the Project. It shall also include the providing of all transportation and services, including fuel, power, water, and essential communications, necessary and for the performance of all labor, work, or other operations required for the performance of the Contract in accordance with the Contract Documents.
B. The Contractor shall sufficiently obligate himself/herself and take the necessary precautions so as to perform and complete the work in accordance with the requirements of the contract documents and specifications and/or as shown on the plans and within the time limit specified herein.
C. Related Sections
1. Section 013000 – Special Project Constraints
2. Section 013300 – Contractor Submittals
3. Section 015100 – Temporary Utilities and Facilities
4. Section 015550 – Temporary Traffic Control Systems
1.2 WORK COVERED BY CONTRACT DOCUMENTS
A. The work is described generally as the following work items:
1. Soil nail wall installation
2. Excavation & backfill
3. Valley gutter replacement
4. Utility lines, utility boxes relocation & replacement, adjust to grade
5. Sign & post relocation & replacement
6. Landscape restoration
7. Miscellaneous and incidental items of work
B. All risk of loss, damage or diminution to the Work shall rest with Contractor until final acceptance of the Work by the City.
1.3 JOB CONDITIONS
A. The Project corridor includes gas mains, high voltage underground power lines, and other potentially hazardous facilities. Contractor shall make himself/herself fully aware of all potential hazards and utilize experienced and qualified personnel when working adjacent to such facilities. Contractor shall be responsible to coordinate with the utility owners as required for compliance when working adjacent to such facilities.
B. Contractor shall be responsible for making himself/herself familiar with the site conditions.
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-2 Project No. C2203
1.4 BEGINNING AND COMPLETION OF THE WORK
A. In accordance with the provisions of the Contract Documents, the Contractor shall begin the Work on the date specified in the written Notice to Proceed from the City, and shall complete all of the Work included in the Contract within the time specified in said Notice. Time stated for completion shall include final cleanup of the premises.
1.5 CONTRACT METHOD
A. The Work of this Contract is a combination unit price and lump sum contract. The basis for measurement and payment shall be as indicated in the General Provisions and these Specifications.
B. The Contractor shall include the requirements of the General Provisions, Special Provisions, and Engineer’s Supplementary Conditions, as a part of all of its subcontract agreements.
1.6 ORDER OF THE WORK
A. Contractor’s order and time to complete shall conform to the requirements of the approved Contractor's schedule as submitted under the provisions for "Contractor's Schedules" in Section 013300, “Contractor Submittals.”
B. Order of work shall include, but not be limited to, consideration of constraints as described in Section 013000, “Special Project Constraints.”
1.7 WORK BY OTHERS
A. Multiple projects (City, other agency, and private) are planned in or adjacent to the City right of way during the time of the contract in the immediate vicinity. The Contractor is responsible for full cooperation with adjacent project operations, coordination of work and work area, and provision of requisite temporary traffic control measures as required within these special provisions. One example as below:
• 2020 Annual Storm Drain Improvements Project – Contractor shall coordinate their work with the work being done with the Storm Drain Improvements Project contractor at Upland Avenue.
B. Interference With Work on Utilities: The Contractor shall cooperate fully with all utility forces of the City or forces of other public or private agencies engaged in the relocation, altering, installation or otherwise rearranging of any facilities which interfere with the progress of the Work, and shall schedule the Work so as to minimize interference with said relocation, altering, or other rearranging of facilities.
C. Contractor shall cooperate fully with all other City contractors or forces of other public or private entities engaged in the installation, relocation, altering, or otherwise rearranging of any facilities which interfere with the progress of the Work, and shall schedule the Work so as to minimize interference with said installation, relocation,
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-3 Project No. C2203 altering, or other rearranging of facilities.
1.8 WORK SEQUENCE/NOTIFICATIONS
A. No sustained interruption in access to any adjacent businesses, institutions, or residences along the alignment can be accommodated. Interruption of access to any adjacent businesses or residences shall not exceed 30 minutes without approval from the City and shall not continue beyond project work hours as specified in Section 013000, “Special Project Constraints.” Prior to beginning work in the vicinity of any businesses, institutions, or residences, the Contractor shall contact the businesses, institution, or residences, provide the business, institution, or home owner a written preliminary notification of the intended schedule, and if necessary, determine and prepare an alternate schedule for the Engineer’s approval that provides minimal disruption. Additional notification requirements are specified in Section 015550, “Temporary Traffic Control Systems.”
1.9 CONTRACTOR USE OF PROJECT SITE
A. The Contractor's use of the project site shall be limited to its construction operations, including on-site storage of materials, and on-site fabrication facilities.
B. The Contractor shall remove all equipment and materials from the City of San Carlos rights-of-way outside of normal work hours.
1. The Contractor shall identify potential staging site(s) for the Contractor’s use for construction staging and storage of equipment/materials directly related to this Project. The Contractor shall make all arrangements with property owner, City, and/or any other party(ies) of interest for staging areas. the Contractor shall provide a signed letter from the property owner authorizing the use of the property as a staging area.
1.10 CITY USE OF THE PROJECT SITE
A. The City and the Engineer and their authorized representatives shall be allowed access to the project site at all times during the period of construction.
B. Private utility companies and other entities performing construction on the site shall have access to the project site.
C. Any land-locked parcels adjacent to the project site shall be provided access/egress by the Contractor.
1.11 PARTIAL UTILIZATION OF THE WORK BY CITY
A. The City may allow partial utilization of the Work upon completion of the various stages. Utilization of the work does not indicate acceptance of any portion of the work.
1.12 PROJECT MEETINGS
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-4 Project No. C2203 A. Preconstruction Meeting: Prior to the commencement of Work at the site, a Preconstruction meeting will be held at a mutually agreed time and place which shall be attended by the Contractor, its Superintendent, and its subcontractors as appropriate. Other attendees may include:
1. Engineer and the Construction Inspector.
2. Representatives of City.
3. Representatives of Permittees as appropriate.
4. Others as requested by Contractor, or Engineer.
B. Unless previously submitted to the Engineer, the Contractor shall bring to the meeting six copies of each of the following:
1. Draft Construction Schedule.
2. Procurement schedule of major equipment and materials and items requiring long lead time.
3. Preliminary Schedule of Shop Drawings, Samples, and Product Data Submittals.
4. Schedule of Values (unit price and lump sum price breakdown) for progress payment purposes.
5. Substitution Requests per Section 013300.
6. Letter of Responsibility designating emergency contacts for the Contractor after business hours (3 copies).
C. The purpose of the meeting is to designate responsible personnel and establish a working relationship. Matters requiring coordination will be discussed and procedures for handling such matters established. The agenda may include the following:
1. Contractor's tentative schedules.
2. Update on public outreach.
3. Transmittal, review, and distribution of Contractor's submittals.
4. Processing applications for payment.
5. Maintaining of record documents.
6. Critical work sequencing.
7. Field decisions and Change Orders.
8. Use of project site, office and storage areas, security, housekeeping, and City's needs.
9. Major equipment deliveries and priorities.
10. Contractor's assignments for safety and first aid.
11. Contact information for Contractor, Superintendent.
D. The Engineer will preside at the Preconstruction meeting and will arrange for keeping the minutes and distributing the minutes to all persons in attendance.
1.13 PRECONSTRUCTION PHOTOGRAPHS
A. Prior to commencement of any construction activity, the City Inspector will take photographs and/or video of all work areas.
B. The Contractor shall conduct a photographic and/or video survey prior to commencement of any construction activity. The purpose for preconstruction documentation is to establish baseline conditions for evaluation of any change in
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-5 Project No. C2203 existing conditions in the vicinity of the work zone during construction (i.e. damage to existing hardscape, structures, etc.).
1.14 WEEKLY PROGRESS MEETINGS
A. Weekly progress meetings will be scheduled and held at the City office, or another mutually agreed location near the site.
PART 2 PRODUCTS
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-6 Project No. C2203 SECTION 013000 – SPECIAL PROJECT CONSTRAINTS
PART 1 - GENERAL
1.1 SCHEDULING
A. Pedestrian access shall be maintained throughout the project site for the duration of the construction. Vehicle access to the adjacent businesses, institutions, and residences shall also be maintained for the duration of the closure.
B. The Contractor shall locate and make himself/herself familiar with existing underground utilities . The proposed roadway and improvements may be within close proximity to existing facilities. The Contractor shall maintain a minimum cover of 18-inches from subgrade to all existing utilities. Any locations that do not meet this requirement shall immediately be brought to the attention of the Engineer.
Adherence with this clause and protection of existing facilities shall be the responsibility of the Contractor.
C. The Contractor shall submit a construction staging area plan for City approval for all staging areas proposed for use with the project.
D. The construction constraints described herein shall be incorporated into the Contractor's schedule.
E. The Contractor shall be responsible for the allocation of space for temporary field offices and structures (if necessary) furnished by itself or its subcontractors; monitoring the use of temporary utilities; verification that adequate services are available to comply with requirements for Work and climatic conditions; and the administration of traffic and parking controls. All such work shall be in strict conformance with the applicable requirements specified in Sections 015100, “Temporary Utilities”, and elsewhere in this Division 1.
F. Night work will not be permitted, with the exception of temporary traffic control measures necessary to perform the Work.
PART 2 - PRODUCTS
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PART 3 - EXECUTION
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END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-7 Project No. C2203 SECTION 013100 – COORDINATION
PART 1 GENERAL
1.1 SUMMARY
A. The Contractor shall be responsible for the coordination of all work and the coordination of the work of all subcontractors. The Contractor shall not delegate coordination to any subcontractor. Coordination, as referred to herein, shall include the establishment of on-site lines of authority and communication and assistance in scheduling of and attendance of progress meetings between the Engineer or the City and the Contractor and its subcontractors. The Contractor's onsite supervisory person shall be present and represent the General Contractor whenever a meeting is held that involves any interface between the City or Engineer and any subcontractors or suppliers.
B. Related Sections
1. Section 011000 – Summary of Work
2. Section 013000 – Special Project Constraints
3. Section 013300 – Contractor Submittals
4. Section 015100 – Temporary Utilities and Facilities
5. Section 015550 – Temporary Traffic Control Systems
6. Section 015600 – Protection of Existing Facilities
1.2 CONSTRUCTION PROGRESS SCHEDULES
A. Submit initial progress schedule for review by Engineer in duplicate within ten (10) working days after date of Contract. After review, submit detailed schedules within ten (10) working days, modified to accommodate revisions recommended by the Engineer and/or the City.
B. Submit revised schedules with each application for payment, identifying changes since previous version. Indicate estimated percentage of completion for each item of work at each submission.
C. Submit a comprehensive 3-week look ahead schedule for discussion with Ci ty at each weekly construction progress meeting.
D. Distribute copies of reviewed schedules to project site file, subcontractors, suppliers and other concerned parties.
E. Instruct recipients to promptly report, in writing, problems anticipated by projections indicated in schedules.
F. Submit computer generated horizontal bar chart with separate line for each major portion of work or operation, identifying first workday of each week.
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-8 Project No. C2203 G. Submit revised Schedule of Values within ten (10) working days after preconstruction meeting, modified to accommodate revisions recommended by the Engineer and/or the City.
1.3 GENERAL COORDINATION
A. All Work covered in the Contract Documents shall be coordinated as a part of the Contractor's obligations under the Contract. The Contractor shall coordinate his/her operations with the City and others working in the immediate area. The Contractor shall coordinate with the impacted property owners.
B. The Contractor shall assure timely fabrication of work, erection of work, and completion of closeout items and the timely preparation of shop drawings and other submittals in conformance with the approved construction schedule.
C. The Contractor shall coordinate the effor ts of all individuals and subcontractors in the execution of the Work, including work by others as specified in Section 01110, "Summary of Work."
D. The Contractor shall resolve differences or disputes between subcontractors concerning coordination, interferences, or extent of work between Sections. The Contractor's decisions, if consistent with the Contract Document requirements, shall be final.
E. The Contractor shall conduct his/her operations so that existing utilities are kept in continuous operation throughout the execution of this contract. The Contractor, therefore, shall schedule and conduct their work so as to minimize interference with the operation and maintenance of these facilities. Methods, schedules and sequences of construction which prevent or jeopardize the City’s compliance with Clean Water Standards or the NPDES Permit are not acceptable.
F. When modification, addition or connection to existing pipelines, structures, systems, circuits or equipment is required, the Contractor shall schedule such activities with the Engineer. The Contractor shall notify the Engineer, in writing, one (1) week in advance of the time when construction operations will require connection to, or modification of, in -service portions of the existing facility. No pipeline system, structure, circuit or individual unit shall be cut, modified, dewatered or removed from the facility unless authorized by the Engineer.
G. In the event that the Contractor accidentally damages operating pipes or utilities, they shall immediately affect the necessary repairs. The Contractor shall maintain an inventory of repair clamps and materials for small pipelines, including temporary pumps, bypass pipelines, electrical conductors or other facilities necessary to maintain operation of sewerage facilities while the repairs are being made. The Contractor shall provide telephone numbers of standby personnel who will respond during non-working hours to repair facilities which interrupt normal operations.
H. If the Contractor fails to respond to a request by the Engineer, the City reserves
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-9 Project No. C2203 the right to affect the repair with its own forces or by another contractor. The cost for repairs performed by others will be deducted from the payment due the Contractor.
I. In addition to notifying the Engineer (Section 1.03 F), Contractor shall notify affected property owners and residents in writing minimum of 48 -hours in advance prior to any planned temporary shutdown of utility services.
J. In City and Contractor shall utilize a web-based document management sys tem for submission of all data and documents, including public outreach documents where applicable throughout the duration of the Contract.
1.4 SPECIAL COORDINATION
A. The Contractor shall provide advance notification to the Engineer of specific tasks, tests and inspections specified. Failure to provide such advance notification may be cause for rejection of the Work.
1.5 COORDINATION OF SUBCONTRACTOR RESPONSIBILITIES
A. The Contractor shall be responsible for coordination of the work of each of its subcontractors and suppliers. Special attention is directed to the following obligations of the Contractor:
1. Verify that subcontractors have obtained permits for inspections.
2. Review all subcontractor shop drawings, product data, and sample submittals for compliance with C ontract Documents prior to submittal to Engineer for general review for compliance with design intent.
3. Maintain onsite documentation and keep current record drawing set at Project site.
4. Verify that specified cleaning is done during progress of Work and at completion of each subcontract.
PART 2 PRODUCTS
Not Used.
PART 3 EXECUTION
Not Used.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-10 Project No. C2203
SECTION 013300 – CONTRACTOR SUBMITTALS
PART 1 GENERAL
1.1 SUMMARY
A. This section describes general requirements for submittals for the Work.
B. Related Sections
1. Section 011100 – Summary of Work
2. Section 013100 – Coordination
3. Section 015550 – Temporary Traffic Control Systems
4. Section 321216 – Paving Systems
5. Section 321723 – Traffic Striping, Pavement Markers, Pavement Markings & Signage
1.2 PROCEDURES
A. Submit at Contractor’s expense, Schedule of Shop Drawing and Sample Submittals, Safety Plans, Progress Schedules, Product Data, Shop Drawings, Samples, Substitution Requests, Traffic Control Plans, Construction Staging Area Plan, Storm Water Pollution Prevention Plan (SWPPP), and Project Record Documents, and all other submittals required by the Contract Documents. Submit these submittals to Engineer for review and approval.
B. Use a submittal transmittal form, in duplicate, containing:
1. Date, and revision date and submittal log number.
2. Project title.
3. Contractor’s name and address and job number.
4. Specification Section clearly identified.
5. The quantity of each Shop Drawing, Product Data, and Samples submitted.
6. Notification of deviations from Contract Documents.
7. Materials safety data sheet (MSDS) for each item complying with OSHA’s Hazard Communication Standard 29 CFR 1910.1200.
8. Other pertinent data.
C. Where manufacturer’s standard drawings or data sheets are used, they shall be marked clearly to show those portions of the data that are applicable to this project.
Submittals shall be submitted based on each technical specification section.
Submittals containing information about more than one specification section will be returned for resubmittal. Submittals shall include all information requested by each specification section. (No partial submittals.) Incomplete submittals will be returned not reviewed by Engineer. Provide a log number and reference to Specifications Section and/or Plan sheets and details, for each submittal for ease of identification of submittal. Submittal shall include:
1. Date and revision dates.
2. Revisions, if any, identified.
3. Project Title and number.
4. The names of: Engineer, Contractor, Subcontractor, Supplier,
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-11 Project No. C2203 Manufacturer, and separate detailer, when pertinent.
5. Identification of product material by location within the Project.
6. Relation to adjacent structure or materials.
7. Field dimensions, clearly identified as such.
8. Specification Section number and applicable detail reference numbers on the drawings.
9. Applicable standards, such as ASTM, ANSI, FS, NEMA, SMACNA or ACI.
10. A blank space, on each Drawing or data sheet, 5” x 4” for the Engineer’s stamp.
11. Identification of deviations from Contract Documents.
12. Contractor’s stamp, initialed or signed, with language certifying the review of submittals, verification of field measurements, construction criteria and technical standards in compliance with Contract Documents.
D. The data shown on the Shop Drawings shall be complete with respect to quantities, dimensions, specified performance and design criteria, materials and similar data to show Engineer the materials and equipment Contractor proposes to provide and to enable Engineer to review the information for the limited purposes specified below. Samples shall be identified clearly as to material, supplier, pertinent data such as catalog numbers and the use for which it is intended and otherwise as Engineer may require to enable Engineer to review the submittal. The number of each Sample to be submitted will be as specified in the Specifications.
E. Substitutions:
1. Substitution for those equipment, procedures, materials and/or products specified shall only be permitted when the proposed unnamed “equal” product or material to be furnished is both equal in quality and utility and after the Contractor has complied with the following provisions:
a. All substitutions shall be reviewed by the City;
b. The City must approve such substitution in writing prior to its incorporation into the work;
c. Unless otherwise authorized in writing by the City, the Contractor shall, prior to award and placing any purchase orders, and at least thirty (30) calendar days before it requires approval of any such alternative item, submit to the City sufficient data, drawings, samples, literature or other detailed information as will demonstrate to the City that the proposed substitute is equal in quality and utility to the equipment, materials, procedures and/or products specified.
2. Within thirty (30) calendar days following receipt of all requested information from the Contractor, the City will determine whether the proposed alternative is equal in quality and utility and meets the requirements of the Contract and will inform the Contractor in writing of such determination. The burden of substantiating the quality and utility of alternatives shall be upon the Contractor, and the Contractor shall furnish all necessary information requested and required by the City. The City will be the sole judge as to the quality and utility of alternative equipment, materials and/or products, and the City’s decision shall be final. An acceptance by the City of a substitution shall not relieve the Contractor from complying with the requirements of the Project Drawings and Specifications. Acceptance by the City shall not relieve the Contractor from full responsibility for the efficiency, sufficiency and
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-12 Project No. C2203 quality and performance of the substitute equipment, materials, procedures and/or products, in the same manner and degree as the equipment, materials, procedures and/or products specified by name.
3. Failure of the Contractor to submit proposed substitutions for review in the manner described above and within the time prescribed shall be sufficient cause for rejection by the City of any other proposed substitutions.
4. In determining whether a proposed product is equal in quality and utility, the City is not restricted to such basic issues as performance and durability, but may consider any other issues that the City, in the discretion of the City, deems appropriate. Said issues may, but are not required to include, nor are they limited to, such additional factors as comparable performance, reliability, efficiency or operation, ease of operation, adaptability, ease of maintenance, capital costs, life-cycle costs, operational characteristics, costs of training personnel, maintenance history, warranties, problems created by the resulting overall warranty system, availability of qualified service, availability of parts, the history of any supplier, and compatibility with existing facilities.
5. No one factor or group of factors, including such issues as savings on capital costs, shall be determinative of whether the proposed product or material is equal in quality and utility. The decision of the City shall be based on those factors deemed by the City to be relevant and any data, drawings, samples, literature or other detailed information furnished by the Contractor with respect to the proposed substitution.
6. Each decision as to whether a product or material is equal in quality and utility shall be made by the City on a case-by-case basis.
7. The Contractor shall be responsible for any and all costs, including consultant costs, incurred by the City with respect to the proposed substitution that exceed the costs inherent in the normal and reasonable review of drawings and other standard data, information and documents concerning any proposed substitution. The Contractor shall be responsible for this cost, regardless of whether or not the substitution is approved by the City.
F. Submittal coordination and verification is the responsibility of Contractor; this responsibility shall not be delegated in whole or in part to subcontractors or suppliers. Before submitting each Shop Drawing or Sample, Contractor shall have reviewed and coordinated each Shop Drawing or Sample with other Shop Drawings and Samples and with the requirements of the Work and the Contract Documents, and shall have determined and verified:
1. All field measurements, quantities, dimensions, specified performance criteria, installation requirements, materials, catalog numbers and similar information with respect thereto;
2. All materials with respect to intended use, fabrication, shipping, handling, storage, assembly and installation pertaining to the performance of the Work; and
3. All information relative to Contractor’s sole responsibilities and of means, methods, techniques, sequences and procedures of construction and safety precautions and programs incident thereto.
G. Contractor’s submission to City or to Engineer of a Shop Drawing or Sample
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-13 Project No. C2203 submittal will constitute Contractor’s representation that it has satisfied its obligations under the Contract Documents, and as set forth immediately above, with respect to Contractor’s review and approval of that submittal.
H. Designation of work “by others”, if shown in submittals, shall mean that work will be responsibility of Contractor rather than subcontractor or supplier who has prepared submittals.
I. The Contractor shall sign a statement with each submittal, certifying that the submittal has been checked by the Contractor and is in conformance with the Specifications. Any submittal received without this certification shall be returned AMEND AND RESUBMIT and count as one submittal under R.5.a of this specification section.
J. After review by City or Engineer of each of Contractor’s submittals, two (2) sets of material will be returned to Contractor with actions defined as follows:
1. NO EXCEPTIONS TAKEN – A formal revision and resubmission of said submittal will not be required. Accepted subject to its compatibility with future submittals and additional partial submittals for portions of the work not covered in this submittal does not constitute approval or deletion of specified or required items not shown on the submittal.
2. MAKE CORRECTIONS NOTED (NO RESUBMISSIONS REQUIRED) Same as 1 above, except that minor corrections as noted shall be made by Contractor.
3. AMEND AND RESUBMIT - Rejected because of major inconsistencies or errors that shall be resolved or corrected by Contractor prior to subsequent review by Engineer.
4. REJECTED - The submittal is illegible or the submittal is so far out of compliance with the contract documents that the Contractor needs to try again, from scratch.
K. Contractor shall make a complete and acceptable submittal at least by second submission. City reserves the right to deduct monies from payments due Contractor to cover additional costs of review beyond the second submission.
Illegible submittals will be rejected and returned to Contractor for resubmission.
Contractor shall be in breach of the Contract if it, following a submittal which City determines falls within category 3 above, Contractor’s first resubmittal does not fall within categories 1 or 2 above.
L. Favorable review will not constitute acceptance by City or Engineer of any responsibility for the accuracy, coordination and completeness of the submittals.
Accuracy, coordination, and completeness of Submittals shall be the sole responsibility of Contractor, including responsibility to back -check comments, corrections, and modifications from City or Engineer’s review before fabrication.
Contractor, subcontractors, or suppliers may prepare submittals, but Contractor shall ascertain that submittals meet requirements of Contract Documents, while conforming to structural space and access conditions at point of installation.
Engineer’s review will be only to determine if the items covered by the submittals will, after installation or incorporation in the Work, conform to the information given in the Contract Documents and be compatible with the design concept of the completed
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-14 Project No. C2203 Project as indicated by the Contract Documents. Favorable review of submittal, method of work, or information regarding materials and equipment Contractor proposes to furnish shall not relieve Contractor of responsibility for errors therein and shall not be regarded as assumption of risks or liability by City or Engineer, or any officer or employee thereof, and Contractor shall have no claim under Contract on account of failure or partial failure or inefficiency or insufficiency of any plan or method of work or material and equipment so accepted. Favorable review shall be considered to mean merely that City and/or Engineer has no objection to Contractor using, upon his /her own full responsibility, plan or method of work proposed, or furnishing materials and equipment proposed.
M. City and/or Engineer’s review will not extend the means, methods, techniques, sequences or procedures of construction or to safety precautions or programs incident thereto. The review and approval of a separate item as such will not indicate approval of the assembly in which the item functions.
N. Submit complete initial submittal for those items where required by individual specification Sections. Complete submittal shall contain sufficient data to demonstrate that items comply with Specifications, shall meet minimum requirements for submissions cited in technical specifications, shall include certifications, where required, and shall include necessary revisions required for equipment other than first named. If Contractor submits incomplete initial submittal, when complete submittal is required, submittal may be returned to Contractor without review.
O. It shall be Contractor’s responsibility to copy, conform and distribute reviewed submittals in sufficient numbers for Contractor’s files, subcontractors and vendors.
P. After City and/or Engineer’s review of submittal, revise as noted and resubmit as required.
Identify changes made since previous submittal.
1. Begin no fabrication or work that requires submittals until return of submittals not requiring resubmittal.
2. Normally, submittals will be processed and returned to Contractor within ten (10) working days of receipt.
Q. Distribute copies of reviewed submittals to concerned persons. Instruct recipients to promptly report any inability to comply with provisions.
R. All shop drawings and submittals shall be number identified by Contractor, prior to submission to Engineer, in accordance with the following:
1. Contractor shall sequentially number each submittal (i.e., “1”, “2”, “3”, etc.) as the basis for number identification of all shop drawings and submittals.
2. Affix the submittal number under which each submittal is made on every copy of each shop drawing, product data, sample, certification, O & M manual, etc.
3. If the submittal is a resubmittal (including without limitation after an initial submittal is rejected, returned not reviewed or marked revise as noted and resubmit), add the suffix designation “A” (i.e., a resubmittal of submittal 1 would be numbered 1A). Subsequent resubmittals would be identified by the
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-15 Project No. C2203 submittal number and sequential letters (i.e., “B”, “C”, “D”, etc.).
4. All submittals shall include all information requested by each specification section. No partial submittals will be accepted unless previously authorized by Engineer. In the event a partial submittal is authorized, each subsequent different submittal (as opposed to resubmittal) is given a new number.
5. Number of resubmissions:
a. One reexamination of Contractor’s submittals that have been returned for correction or replacement will be included in Engineer’s scope. Any additional reexamination of Contractor’s submittals will be considered additional scope services to be paid by Contractor through City. Engineer shall be paid hourly at 3.0 times direct payroll expenses and charge consultant’s time at 1.25 times the amount billed Engineer.
1.3 SCHEDULE OF SHOP DRAWING AND SAMPLE SUBMITTALS
A. Submit preliminary Schedule of Shop Drawing, Samples, and Product Data Submittals as required, no later than five (5) working days following receipt of Notice to Proceed from City.
B. Schedule of Shop Drawing, Samples, and Product Data Submittals will be used by City and Engineer to schedule their activities relating to review of submittals.
Schedule of submittals shall indicate a spreading out of submittals and early submittals of long lead-time items and of items that require extensive review.
C. Schedule of Shop Drawing, Samples, and Product Data Submittals shall be reviewed by City and shall be revised and resubmitted until accepted by City.
D. Unless otherwise specified, make submittals in groups containing all associated items to assure that information is available for checking each item when it is received. Identify on the submittal which submittals should be reviewed together.
E. The Contractor agrees that shop drawing submittals processed by the City are not Change Orders; that the purpose of shop drawing submittals by the Contractor is to demonstrate to the City that they understand the design concept, that the Contractor demonstrates their understanding by indicating which equipment, procedure and material they intend to furnish and install and by detailing the proposed fabrication and installation methods. The Contractor further agrees that if deviations, discrepancies or conflicts between shop drawing submittals and the Contract Documents in the form of design drawings and specifications are discovered either prior to or after shop drawing submittals are processed by the City, the design drawings and specifications shall control and shall be followed.
1.4 DELAY OF SUBMITTALS
A. Delay of submittals by Contractor is considered avoidable delay. Liquidated damages incurred because of late submittals will be assessed to Contractor.
B. The City may periodically inspect the record drawings at the site. The proper and current maintenance of the information required on these drawings shall be a
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-16 Project No. C2203 condition precedent to approval of requisitions for periodic payment.
1.5 RECORD DRAWINGS
A. General: The Contractor shall keep and maintain, at the job site, one record set of Contract Drawings. On these, it shall mark all project conditions, locations, configurations, and any other changes or deviations which may vary from the details represented on the original Contract Drawings, including buried or concealed construction and utility features which are revealed during the course of construction.
B. Special attention shall be given to recording the horizontal and vertical location of all buried utilities that differ from the locations indicated, or which were not indicated on the Contract Drawings. Said record drawings shall be supplemented by any detailed sketches as necessary or directed to indicate, fully, the Work as actually constructed.
C. These master record drawings of the Contractor’s representation of “as-built” conditions, including all revisions made necessary by addenda, change orders, and the like shall be maintained up-to-date during the progress of the Work.
D. In the case of those drawings which depict the detail requirement for equipment to be assembled in the factory, the record drawings shall be updated by indicating those portions which are superseded by change order drawings or final shop drawings, and by including appropriate reference information describing the change orders by number and the shop drawings by manufacturer, drawing, and revision numbers.
E. Record drawings prepared by the Contractor shall be accessible to the Engineer at all times during the construction period and shall be delivered to the Engineer upon completion of the work.
F. Effect on Progress Payments: Requests for partial payments will not be approved if the record drawings are not kept current. All such Record Drawings will be inspected by the City each month, showing all variations between the Work as actually constructed and as originally shown on the Contract Drawings or other Contract Documents, and the City will not process monthly payment requests until such drawings are made current each month.
G. Final Record Drawings: Upon substantial completion of the Work and prior to final acceptance by the City, the Contractor shall complete and deliver one bond copy set and an electronic scanned set in PFD format with legible red-line changes dated and signed by the Contractor to the City for approval. The redline changes shall conform to the construction records of the Contractor. This information will be assumed to be reliable, and the Engineering will not be responsible for the accuracy of such information, nor for any errors or omissions which may appear on the Record Drawings as a result.
H. Effect on Final Payment: Final payment will not be approved until the Contractor- prepared bond copy set and an electronic scanned set in PFD format of the Record
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-17 Project No. C2203 Drawings have been delivered to the City.
PART 2 PRODUCTS
Not Used.
PART 3 EXECUTION
Not Used.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-18 Project No. C2203 SECTION 014516 – QUALITY CONTROL
PART 1 GENERAL
1.1 SITE INVESTIGATION AND CONTROL
A. The Contractor shall verify all dimensions in the field and shall check all field conditions continuously during construction. The Contractor shall be solely responsible for any inaccuracies built into the Work.
B. The Contractor shall inspect related and appurtenant work and shall report in writing to the Engineer, any conditions which will prevent proper completion of the Work. Any required removal, repair, or replacement caused by the Contractor shall be done by the Contractor’s work at its sole cost and expense.
1.2 INSPECTION OF THE WORK
A. General: The Work shall be conducted under the general observation of the Engineer and shall be subject to inspection by representatives of the City to verify strict compliance with the requirements of the Contract Documents.
B. The authorized representative of the Engineer on the project site shall be the Project Engineer acting directly and through various inspectors at the site. The presence of the Inspectors, however, shall not relieve the Contractor of the responsibility for the proper execution of the Work in accordance with all requirements of the Contract Documents. Compliance is distinctly a duty of the Contractor, and said duty shall not be avoided by any act or omission on the part of the inspector(s).
C. All materials and articles furnished by the Contractor shall be subject to rigid inspection, and no material or articles shall be used in the Work until it has been inspected and accepted by the Engineer or the City.
D. Inspection at Place of Manufacture: Unless otherwise specified, all products, materials, and equipment shall be subject to inspection by the Engineer at the place of manufacture if deemed necessary by the Engineer.
E. The presence of the Engineer at the place of manufacture however, shall not relieve the Contractor of the responsibility for furnishing products, materials, procedures and equipment which comply with all requirements of the Contract Documents.
1.3 SAMPLING AND TESTING
A. Unless otherwise specified, all sampling and testing shall be in accordance with the methods prescribed in the current standards of the ASTM or other specified published standards, as applicable to the class and nature of the article or materials considered; however, the City reserves the right to use any generally- accepted system of sampling and testing which, in the opinion of the Engineer will indicate to the City that the quality of the workmanship is in full accord with the Contract Documents.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-19 Project No. C2203
B. Any waiver by the City of any specific testing or other quality assurance measures, whether or not such waiver is accompanied by a guarantee of substantial performance as a relief from the specified testing or other quality assurance requirements as original ly specified, and whether or not such guarantee is accompanied by a "performance bond" to assure execution of any necessary corrective or remedial Work, shall not be construed as a waiver of any prescriptive or performance requirements of the Contract Documents. "Performance Bond" as used herein is a separate bond in addition to the Contract Performance Bond required in the General Conditions.
C. Notwithstanding the existence of such waiver, and in addition to any testing and inspection performed by any other inspector on behalf of the City or any other public agency having jurisdiction, the Engineer shall have the right to make independent investigations and tests, and failure of any portion of the Work to meet any of the requirements of the Contract Documents, shall be reasonable cause for the Engineer to require the removal or correction and reconstruction of any such work in accordance with the General Conditions.
1.4 TESTING AND INSPECTION SERVICES
A. Employ and pay for services of an independent testing agency or laboratory acceptable to City to perform specified testing.
1. Prior to start of Work, submit testing laboratory name, address, and telephone number, and names of full -time specialist and responsible officer.
2. Submit copy of report of laboratory faci lities inspection made by Materials Reference Laboratory of National Bureau of Standards during most recent inspection, with memorandum of remedies of deficiencies reported by inspection.
B. The independent firm will perform tests, inspections and other serv ices specified in individual specification sections and as required by the Engineer.
1. Laboratory: Authorized to operate in the State of California.
2. Laboratory Staff: Maintain full time specialist on staff to review services.
3. Testing Equipment: Calibrated at reasonable intervals with devices of accuracy traceable to National Bureau of Standards or accepted values of natural physical constants.
C. Testing, inspections and source quality control may occur on or off project site.
Perform off-site testing as required by the Engineer or City.
D. Reports will be submitted by an independent firm to the Engineer and Contractor, indicating observations and results of tests and indicating compliance or non- compliance with Contract Documents.
E. Cooperate with independent firm; furnish samples of materials, design mix, equipment, tools, storage, safe access, and assistance by incidental labor as requested.
1. Notify Engineer and independent firm 24 hours prior to expected time for operations requiring services.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-20 Project No. C2203
2. Make arrangements with independent firm and pay for additional samples and tests required for Contractor's use.
F. Testing and employment of testing agency or laboratory shall not relieve Contractor of obligation to perform Work in accordance with requirements of Contract Documents.
G. Re-testing or re-inspection required because of non-conformance to specified requirements shall be performed by same independent firm on instructions by the Engineer. Payment for re-testing or re-inspection is the sole responsibility of the Contractor.
H. Agency Responsibilities:
1. Test samples of mixes submitted by Contractor.
2. Provide qualified personnel at site. Cooperate with Engineer and Contractor in performance of services.
3. Perform specified sampling and testing of products in accordance with specified standards.
4. Ascertain compliance of materials and mixes with requirements of Contract Documents.
5. Promptly notify the Engineer and Contractor of observed irregularities or non- conformance of Work or products.
6. Perform additional tests required by the City or Engineer.
7. Attend preconstruction meetings and progress meetings on request.
I. Agency Reports: After each test, promptly submit one copy of the report to the Engineer and to the Contractor. When requested by the Engineer, provide interpretation of test results. Include the following:
1. Date issued.
2. Project title and number.
3. Name of inspector.
4. Date and time of sampling or inspection.
5. Identification of product and specifications section.
6. Location in Project.
7. Type of inspection or test.
8. Date of test.
9. Results of tests.
10. Conformance with Contract Documents.
J. Limits On Testing Authority:
1. Agency or laboratory may not release, revoke, alter, or enlarge on requirements of Contract Documents.
2. Agency or laboratory may not approve or accept any portion of the Work.
3. Agency or laboratory may not assume duties of Contractor.
4. Agency or laboratory has no authority to stop the Work.
1.5 TESTING
A. All materials, equipment and work included in this contract shall be tested and inspected to prove compliance with the contract requirements. Unless otherwise
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-21 Project No. C2203 specified, all costs of testing, including temporary facilities and connections, shall be borne by the Contractor. No tests specified herein shall be applied until the item to be tested has been inspected an d approval given for the application of such test.
Tests and inspections shall include:
1. Factory tests.
2. The delivery acceptance test and inspections.
3. The installed tests and inspections of items as installed.
4. Tests and inspections, unless otherwise specifi ed or accepted, shall be in accordance with the recognized standards of the industry.
The form of evidence of satisfactory fulfillment of delivery acceptance test and of installed test and inspection requirements shall be, at the discretion of the City, either by tests and inspections carried out in the City’s presence or by certificates or reports of tests and inspections carried out by approved persons or organizations. The Contractor shall provide and use forms which include all test information, including specified operational parameters, and shall be acceptable in content to the City.
B. Factory Observations and Tests. At the request of the City, the Contractor shall arrange with the factory for the City or his/her representatives to observe the manufacturing process and to witness performance tests at the factory or point of manufacture of any and all items to be furnished as a part of this contract. The Contractor shall inform the City in sufficient time to allow arrangements to be made for witness of manufacture and tests. Where the City elects not to observe the manufacture or witness s uch tests, the Contractor shall provide the City with certifications that the materials and equipment meet the requirements of the specifications.
C. Delivery Acceptance Tests and Inspections. The delivery acceptance tests and inspections shall be at the Contractor’s expense for any materials or equipment specified herein and shall include the following:
1. Test of items at the place of manufacture during and/or on completion of manufacture, comprising material tests, hydraulic pressure tests, electrical and instrumentation subsystem tests; electric and operating tests, and inspections in accordance with the relevant standards of the industry and more particularly as detailed in individual clauses of these specifications to satisfy the City that the items tested and inspected comply with the requirements of this contract.
2. Inspection of all items delivered at the site or to any authorized place of storage in order that the City may be satisfied that such items are of the specified quality and are in good order and condition at the tie of delivery.
To that end, the Contractor shall be prepared to remove all coverings, containers or crates to permit the City to conduct the inspection. Should the City find, in his/her opinion, indication of damage or deficient quali ty, the Contractor shall provide the necessary documentation or conduct tests deemed necessary by the City to demonstrate compliance.
D. Tests and Inspection. All materials and equipment shall be tested by the Contractor
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-22 Project No. C2203 to the satisfaction of the City before any facility is put into operation. Tests shall be as specified in these specifications and shall be made to determine whether the materials and equipment have been properly assembled, aligned, adjusted and connected. Any changes, adjustments or replacements required to make the equipment operate as specified shall be carried out by the Contractor as part of the work.
E. All gauges, meters, recorders and monitors shall be provided by the Contractor as required by the City to supplement or augment the instr umentation system provided under this contract to properly demonstrate that all materials and equipment fully satisfy the requirements of these specifications. All devices employed for the purpose of measuring the performance of the facility’s equipment and systems shall be specifically selected to provide a level of uncertainty consistent with the variables to be monitored. All instruments shall be recently calibrated, and the Contractor shall be prepared at all times to demonstrate, through recalibration, the uncertainty of all instruments employed for testing purposes. Calibration procedures shall be in accordance with applicable standards of ASTM, ISA and IEEE. The adequacy of all gauges, meters, recorders and monitors shall be subject to review of the City.
1.6 MANUFACTURERS' FIELD SERVICES
A. When specified in individual specification sections, require material or product suppliers or manufacturers to provide qualified staff personnel to observe site conditions, conditions of surfaces and installation, quality of workmanship, start-up of equipment, and test, adjust and balance of equipment as applicable, and to initiate instructions when necessary.
B. Submit qualifications of observer to the Engineer thirty (30) days in advance of required observations. Observer subject to approval of Engineer.
C. Report observations and site decisions or instructions given to applicators or installers that are supplemental or contrary to manufacturers' written instructions.
1.7 DEFECTIVE MATERIALS TO BE REMOVED
A. All materials not conforming to the requirements of these Specifications shall be considered as defective; and all such materials, whether in place or not, shall be rejected and shall be removed immediately from the site of the work.
PART 2 PRODUCTS
Not Used.
PART 3 EXECUTION
Not Used.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-23 Project No. C2203 SECTION 015050 – MOBILIZATION
PART 1 GENERAL
1.1 SUMMARY
A. Mobilization shall include the obtaining of all bonds, insurance, permits, and licenses; furnishing equipment, temporary buildings, leasing of temporary equipment and material storage area, and other construction facilities; all as required for the proper performance and completion of the Work. In addition to this specification, Section 11 “Mobilization”, paragraph 9-1.16D Mobilization of the Caltrans Standard Specifications shall also apply to this Contract. Mobilization shall include but not be limited to the following principal items:
1. Moving on to the site and furnishing equipment required for the operations.
2. Developing construction water supply.
3. Providing on-site sanitary facilities and potable water facilities as specified in Section 015100, “Temporary Utilities and Facilities.”
4. Arrangement for and erection of Contractor’s work and storage yard, including
site security.
5. Contractor is advised that there may be insufficient area within the construction zone to provide parking, staging for material and storage of equipment.
6. Providing a meeting room at the Contractor’s work and storage yard, 8.
Posting all EPA and OSHA required notices and establishment of safety programs.
7. Have the Contractor’s superintendent at the job site full time.
8. Submittal and City acceptance of the Construction Schedule.
9. Establishing site security, lighting, fencing, and signing.
10. Obtaining all bonds, insurance, permits, and licenses.
11. Providing public outreach for the duration of the project, including, but not limited to, pre-construction notices, construction area signage, community outreach, etc. Outreach to be coordinated with the various submittals required by the Contrac tor for coordination, traffic and pedestrian control, and general site controls for the project.
B. Mobilization does not include costs associated with temporary traffic control.
1.2 NOTIFICATION OF RESIDENTS AND BUSINESSES
A. This work shall include furnishing and distributing advance notice flyers to residents and businesses on all streets and including side/cross streets adjacent, and all emergency, public transportation, and garbage/recycle collection services where contract work is to be performed. Notices shall be consistent with dates provided and posted on “No Parking Tow Away” signs.
B. Notifications shall include at least the following information:
1. Identification of Contractor(s) including emergency contact name(s) and phone number(s),
2. Description of work,
3. Dates and times of construction, and
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-24 Project No. C2203
4. Information regarding street closures and/or detouring.
C. The contractor shall submit to the City an advance notice flyer in the form of a letter or door hanger for review and approval.
PART 2 PRODUCTS
2.1 ADVANCE NOTICE FLYERS
A. Flyer shall contain a general description of the work to be done, a schedule identifying the street segment and date that work is to be performed, and any restrictions that will be imposed as a result of the work.
2.2 NO PARKING SIGNS
A. City will provide “No Parking” signs for the Contractor’s use on this project.
Contractor shall arrange for the pickup of signs not less than seven days prior to being needed.
PART 3 EXECUTION
3.1 DISTRIBUTION OF FLYERS
A. Advance notice flyers shall be hand delivered by the Contractor to residents, schools, or businesses along the impacted streets , including side/cross streets adjacent at least seven to ten (7-10) calendar days in advance of the street closure.
Notices shall also be placed on the front window of all vehicles parked against the curb. If different notices are used for different areas, the Contractor shall take care to deliver the appropriate notice to the correct location. In the vicinity of school areas, Contractor shall coordinate with City Staff and school principals to notify the parents of any changes in traffic patterns, detours, or parking restrictions. The notification shall include a copy of the approved Traffic Control Plan or detours around the school area.
B. Notification shall consist of a procedure of written one-week notices (handouts and/or mailings), and door-to-door notifications 24 hours prior to starting work for every phase of construction (soil nail drilling, shotcrete application, concrete work, etc.).
3.2 NO PARKING SIGNS
A. If necessary, “No Parking Tow Away” signs shall be posted on the front and back of Type II barricades, spaced no greater than 100-feet apart, a minimum of 48 hours in advance of all work requiring parking restrictions. Only the date in which the parking restriction is needed shall be printed (in 2-inch letters) on the sign. All signs must be removed immediately after the work requiring the parking restriction has been completed.
B. The first barricade of each block, on both sides of the street, in both directions of
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-25 Project No. C2203 travel (4 totals) shall contain, in addition to the “No Parking – Tow Away” sign, the advance notice flyer to provide property owners with a general description of the work to be done. The Contractor shall notify the inspector 48 hour in advance of the operation. City inspector will verify the posting and notify the police department.
3.3 PUBLIC OUTREACH
A. Public Outreach
1. The Contractor shall apply a proactive public outreach approach to construction operations throughout the duration of the project, including noticing the public prior to the beginning of construction activities. Outreach shall be coordinated with the project schedule and project components such as: traffic and pedestrian controls; noticing for residents; businesses; schools; etc. Ensure that the building/property manager or owner receives notifications for managed properties (i.e., apartments, businesses). Public outreach activities need to match updates to the project schedule, and also be timed appropriately for work items.
2. Multiple public notifications shall be provided for various work items as described elsewhere in the specifications.
3. Public outreach shall include daily and weekly activities to notify the public of construction impacts and progress. The Contractor shall designate a construction crew member for public outreach (outreach lead), who will be responsible for handling public outreach tasks and coordination, including coordination with the City. The outreach lead shall attend construction progress meetings.
4. Contractor shall utilize the project’s web-based document management system for the transmittal of outreach materials for City and public.
5. Providing public outreach for the duration of the project, including, but not limited to, pre-construction notices, construction area signage, weekly electronic- based communication, community outreach, etc. Outreach to be coordinated with the various submittals required by the Contract for coordination, traffic and pedestrian control, and general site controls for the project.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-26 Project No. C2203 SECTION 015100 – TEMPORARY UTILITIES AND FACILITIES
PART 1 GENERAL
1.1 SUMMARY
A. It shall be the Contractor's responsibility to provide labor and equipment that is adequate for the performance of the Work under this Contract within the time specified. All equipment shall be kept in satisfactory operating condition, shall be capable of safely and efficiently performing the required Work.
1.2 POWER AND LIGHTING
A. Power: The Contractor shall provide all necessary temporary power, including fuel, required for its operations under the Contract, including operation of traffic control devices, lighting, etc., and shall provide and maintain all temporary power lines required to perform the Work in a safe and satisfactory manner.
B. Construction Lighting: All Work conducted at night or under conditions of deficient daylight shall be suitably lighted to ensure proper Work and to afford adequate facilities for inspection and safe working conditions. All construction lighting shall be shielded to reduce light from affecting non-work areas.
C. Approval of Electrical Connections: All temporary connections for electricity shall be subject to approval of the City, the Engineer and the power company representative, and shall be removed in like manner at the Contractor's expense prior to final acceptance of the Work by the City.
D. Separation of Circuits: Unless otherwise permitted by the Engineer, circuits separate from lighting circuits shall be used for all other power purposes.
E. Construction Wiring: All wiring for temporary electric light and power shall be properly installed and maintained and shall be securel y fastened in place. All electrical facilities shall conform to the requirements of Title 8, Industrial Relations, Subchapter 5, Electrical Safety Orders, California Administrative Code; and Subpart K of the OSHA Safety and Health Standards for Construction.
1.3 WATER SUPPLY
A. General: The Contractor shall be responsible for making necessary arrangements for obtaining construction water, and shall include the cost of obtaining and use of water in the various bid prices for the project.
1.4 SANITATION
A. Toilet Facilities: Fixed or portable chemical toilets shall be provided wherever needed for the use of employees and shall be regularly maintained to provide clean, sanitary conditions.
B. Sanitary and Other Organic Wastes: The Contractor shall establish a regular twice
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-27 Project No. C2203 weekly collection of all sanitary and organic wastes. All wastes and refuse from sanitary facilities provided by the Contractor or organic material wastes from any other source related to the Contractor's operations shall be disposed of away from the site in a manner satisfactory to the Engineer and in accordance with all laws and regulations pertaining thereto.
PART 2 PRODUCTS
Not Used.
PART 3 EXECUTION
Not Used.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-28 Project No. C2203 SECTION 015550 – TEMPORARY TRAFFIC CONTROL SYSTEMS
PART 1 GENERAL
A. Contractor is responsible for comprehensive site-wide temporary traffic control provisions. Under this item of work, Contractor is also responsible for providing regional temporary traffic control signs and Changeable Message Signs.
1.1 SUBMITTALS
A. Administrative Submittals: Copies of permits and approvals for construction as required by Laws and Regulations and governing agencies.
B. Shop Drawings:
1. Traffic Control, Detour & Routing Plans, Pedestrian Control, and School Zone Access & Pedestrian Control Plans: As specified herein, and proposed revisions thereto. Submittals shall consider both the standard work day and nighttime operations.
C. Traffic Control Engineer: Qualifications of proposed traffic control engineer.
1.2 VEHICULAR TRAFFIC
A. Traffic Control Plan: Detailed traffic control plans shall show the locations of traffic cones, k-rail, construction zones, flaggers, stored pipe and materials, construction truck access, barricades, detours, signs, changeable message boards, and other traffic control facilities. Submit traffic control plans five (5) working days prior to start of construction and throughout all construction stages as the Work progresses.
B. Regional Traffic Management: Regional traffic control plans shall show the locations of access routes, closures, detours, temporary traffic signs, construction signage, changeable message boards, and other regional traffic control facilities.
Plan shall show and accommodate adjacent projects. Submit traffic control plans five (5) working days prior to start of construction and throughout all construction stages as the Work progresses.
C. Traffic Routing Plan: Show sequences of construction affecting the use of roadways, time required for each phase of the Work, provisions for decking over excavations and phasing of operations to provide necessary access, and plans for signing, signaling, barricading, and striping to provide passages for pedestrians and vehicles. Include schedule for covering traffic control signs (including detour signs) when not in use and uncovering just prior to use. Show applicable signs for each individual construction stage. Contractor shall be aware of the narrow road at the job site.
D. Each afternoon at 3 p.m., meet with City or its designated representative to describe the following day's construction operations and the traffic control provisions. At each meeting, submit a detailed update of traffic control provisions and construction crew locations. This shall be submitted in hardcopy and
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-29 Project No. C2203 electronic form using a Word file. The update shall contain a list of signs and the time and location for covering and uncovering signs.
1.3 TRAFFIC CONTROL ENGINEER
A. The Traffic Control Plans and updates shall be prepared and presented by a registered civil engineer with expertise in traffic control (hereinafter designated as the Traffic Control Engineer). The Traffic Control Engineer shall develop and update Traffic Control Plans, oversee the field implementation of Traffic Control Plans, and provide quality assurance for compliance with traffic control procedures.
B. Each evening and morning, signs shall be covered and uncovered as needed to inform the public of roadway closures, detours, work zones, and other traffic information. Each evening just before crews leave, all signs not required shall be covered and all signs required shall be uncovered. Each morning before start of construction, all signs not required shall be covered and all signs required shall be uncovered. The Traffic Control Engineer shall oversee the covering and uncovering of signs each evening and morning.
C. Traffic Control Engineer shall be responsible for verifying that property owner/occupant notifications are made in accordance with Contract requirements.
PART 2 PRODUCTS
2.1 CIP PROJECT SIGN
A. Material: Aluminum 0.080”
B. Size: 24”x36”
C. Round all corners
D. Colors:
a. Border – white,
b. Background – Green,
c. City of San Carlos Logo – Black, Green, and Yellow,
d. Text – white.
PART 3 EXECUTION
3.1 TRAFFIC CONTROL
A. Traffic control shall be done in accordance with the Traffic Constraints Drawings, Caltrans Standard Plans & Specifications, and the California Manual on Uniform Traffic Control Devices (California MUTCD, Caltrans, January 21, 2010), and the City of San Carlos’ Standards and Specifications.
B. Non-closure traffic control: Work that interferes with public traffic, either one-lane or two-lane traffic, shall not cause any traffic delays to public traffic between 7 a.m. to 8:30 a.m., nor more than 5-minute delays to public traffic between the hours of 8:30 a.m. to 4:30 p.m. Local traffic shall not be delayed at any time for more than 5 minutes. School buses shall not be delayed for more than 1 minute. During non-
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-30 Project No. C2203 working hours, Saturdays, Sundays, and holidays, the full width of the traveled way in both directions shall be open for use by the public, unless approved for closure.
Where road is closed to through traffic, full width of the roadway shall be open for local traffic during non- working hours. During working hours, one lane of the roadway shall be open for local traffic in both directions except as permitted in advance by the Engineer. Holidays shall be those designated by the City of San Carlos.
1. Emergency Response Vehicles shall not be impeded at any time.
C. Work hours shall be as stated in Special Provisions . Work hours shall be further limited to daylight hours. Daylight hours are defined as 1/2 hour after sunrise and 1/2 hour before Sunset.
D. Contractor shall fill or plate the trench at the end of each working day. Trench plates shall be textured to inhibit skidding. Use cold-patch or other means to feather transition at 3.3 percent (30:1) to plates. Where pit oper ations remain unfilled, steel plating shall be provided during non-working hours.
E. Traffic Control Engineer shall provide routine surveillance of project during non- working hours. Contractor shall provide the name and phone number for the Contractor’s contact person for nighttime project operations. Replacement of non- working or stolen controls is required prior to commencing with construction.
F. Minimum lane width during construction shall be 11 feet, unless noted otherwise.
1. Nearest travel lane edge (tubular marker delineators) shall be no less than 8 feet from the edge of open trench. Contractor shall use K -Rail if 8 foot cannot be maintained
2. Where cones are used to separate traffic lane from construction zone, do not use traffic lane for accessing construction zone and do not store materials or equipment on or near shoulder of traffic lane side of roadway.
G. Whenever it is necessary to cross, close, or obstruct driveways and walks, whether public or private, provide and maintain suitable and safe bridges, detours, or other temporary expedients for accommodation of public and private travel.
H. Driveway and Private Road Closures: Maintain satisfactory means of exit for persons residing or having occasion to transact business along the route of the Work. If it is necessary to close off vehicular access to property for periods greater than 2 hours, provide written notice to each owner/occupant so affected, 3 days prior to such closure. Steel traffic plates shall be readily accessible in case of emergency.
I. Maintain top of backfilled trenches before they are paved to allow normal vehicular traffic to pass over. Provide temporary access driveways where required. Cleanup operations shall follow immediately behind backfilling.
J. Notify the fire department, police/sheriff department, highway patrol, ambulance service, local school district, post office, refuse companies and transit agencies five (5) working days before closing roadway or portion thereof. Notify said departments or agencies when streets are again passable for vehicles. Conduct operations with the least interference to fire equipment access, and at no time
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-31 Project No. C2203 prevent such access. Furnish Contractor’s night emergency telephone numbers to the police or sheriff's department.
K. Move mailboxes to temporary locations accessible to postal service and on completion of Work in each area, replace them in their original location and in a condition equal to or better than original.
L. Contractor shall move property owners’ (residents’) garbage and recycle cans to areas accessible for garbage and recycle pick up. Garbage and recycle cans shall be returned to owners’ driveway after pick up.
M. Pedestrian and bicycle access along sidewalks and streets will be kept open and safe from construction activities, however necessary closures shall be detour and signed appropriately, per a Pedestrian Control Plan, where applicable.
N. Coordination: Coordinate traffic routing with that of others working in the same or adjacent areas. Coordinate access for garbage pick up, mail delivery, and school buses.
O. Barricades and Lights:
1. Provide as shown on the Traffic Control Plans and in sufficient quantity to safeguard public and Work.
2. Provide as necessary to prevent unauthorized entry to construction areas and affected roads, streets, and alleyways, inside and outside of fenced area, and as required to ensure public safety and the safety of Contractor’s employees, other employer's employees, and others who may be affected by the Work.
3. Provide to protect existing facilities and adjacent properties from potential damage.
4. Locate to enable access by facility operators and property owners.
5. Protect streets, roads, highways, and other public thoroughfares that are closed to traffic by effective barricades with acceptable warning signs.
6. Locate barricades at the nearest intersecting public thoroughfare on each side of the blocked section and at any additional locations indicated on the Traffic Control Plan.
P. Temporary Pavement Markings:
1. Temporary Pavement Delineation: Whenever Contractor’s operations reduce visibility of pavement delineation (lane lines, either pavement markers or painted lines or both, or temporary delineation) and pavement marking, such pavement delineation and pavement marking shall be replaced by either permanent or temporary delineation and marking before opening the traveled way to public traffic. Temporary delineation and marking shall consist of reflective traffic tape or reflective pavement markers, as determined by Engineer. Reflective tape for temporary delineation shall be applied in pieces not less than 24 inches long, or less than 4 inches wide, spaced no more than 24 feet apart. Reflective tape for pavement markings shall be placed to approximate the obliterated pavement markings, as determined by Engineer. Reflective traffic tape or reflective pavement markers shall be applied in accordance with the manufacturer's instructions. In areas where construction activity removes
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-32 Project No. C2203 the pavement, Contractor shall use portable delineators (18 inches high by 2 inches wide) to designated travel lanes. Portable delineators shall be in accordance with the Standard Specifications. Once asphalt "plugging" of trench and damaged areas is complete, pavement markings and striping shall be replaced. Temporary pavement delineation shall be maintained by Contractor, at his/her own expense, until it is replaced with permanent delineation. Final pavement markings and striping shall be done after completion of overlay.
Q. Signs and Equipment:
1. Traffic control signs and equipment shall be placed as shown on Traffic Constraint Drawings and as directed by the City.
2. Contractor shall maintain existing traffic control signs during construction.
Roadway facilities and signs shall be protected in accordance with Section 15-1.02 and 7-1.11 of the Standard Specifications.
3. Portable TOW-AWAY-NO STOPPING Signs: Place where approved by police or California Highway Patrol.
4. TOW-AWAY-NO STOPPING signs shall be posted seventy-two (72) hours prior to construction activity requiring removal.
5. Portable BUSINESSES ARE OPEN Signs: Place at accesses to businesses in the vicinity of construction activities.
6. Tubular Markers or Traffic Safety Drums: Provide to delineate traffic lanes to guide and separate traffic movements.
7. Provide at obstructions, such as material piles and equipment, as directed by Engineer.
8. Illuminate barricades and obstructions with warning lights from sunset to sunrise, or as directed by Engineer.
9. Use to alert general public of construction hazards, which would include surface irregularities, unramped walkways, grade changes, and trenches or excavations in roadways and in other public access areas.
10. Post-mount informational signs (all ends of detour and throughout detour vicinity) of detour 5 working days before detouring any traffic as to the date, time, and duration of the detour. Sign shall be stenciled with 6-inch black letters on a retro-reflective orange background. Signs shall meet Caltrans specifications.
11. Place solar powered barricade-type lights on DETOUR signs and construction speed limit signs.
12. All portable and night use signs shall use "diamond" grade reflective lettering.
13. Detour signs shall be covered when not in use and uncovered just prior to use. Detour signs shall be covered with wood or metal. The use of easily displaced material such as plastic bags, burlap sacks, duct tape, etc. is not acceptable. All signs that are not applicable to the current construction stage shall be removed or covered.
R. At each road closure barricade, a flagger shall be provided. For each single-lane closure, flaggers shall be provided for each crew. Flaggers shall have radios for communication with other flaggers and with crew foremen. Flaggers shall not leave their posts unattended for any length of time. Provide replacement flaggers as required for continuous coverage.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-33 Project No. C2203 S. Payment Reductions:
1. Owner reserves the right to retain amounts for non-compliance with the requirements of Section 015550, “Traffic Control”, and Section 015600, “Protection of Existing Facilities”, as follows:
a. Non-compliance related to safety for workers or the traveling public:
1) First non-compliance: $1,000.
2) Second non-compliance: $5,000.
3) Third non-compliance: $10,000.
4) Fourth and subsequent non-compliances, each: $25,000. b. Safety related non-compliance relates to lack of k -rail, cones, barricades, light towers, reflective vests, delineators, flaggers, temporary or permanent striping, crash cushions, emergency access, warning signage, non-skid plates, sufficient clearance of stored pipe, dirt and mud free roads, or to other conditions such as uneven roads that endanger workers or the traveling public. c. Non-compliance related to work hours in City right-of-way:
1) $100 for each minute beyond the work hour limits.
d. Non-compliance related to disruption of the traveling public other than work hour non-compliance:
1) First non-compliance: $0.
2) Second non-compliance: $500.
3) Third non-compliance: $1,000.
4) Fourth and subsequent non-compliances, each: $5,000. e. Non-compliance related to disruption of the traveling public relates to lack of informational or detour signage, failure to cover or uncover signs, failure to meet sequencing and completion. requirements of pipeline segments and locations, or to other conditions that give rise to disruption of the public such as blocked driveways, any delay to a school bus greater than 1 minute or delays related to lack of flaggers or radios.
f. If non-complying work items are not corrected in the timeframe designated by Engineer, the City may perform the Work. For such Work, the cost, plus 100 percent for administration and overhead, will be retained from payments. This amount is in addition to the amounts indicated above.
g. Amounts retained shall be credited to the Owner through a Change Order to the Contract.
3.2 CIP PROJECT SIGN
A. The Vector files for the sign and logos shall be supplied to the sign manufacturer upon request. The Contractor shall provide the Company name and a 24-hour toll- free contact phone number on the sign. The Contractor shall check with the Project Manager to obtain the project name and telephone number before fabr icating the sign.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-34 Project No. C2203 SECTION 015600 – PROTECTION OF EXISTING FACILITIES
PART 1 GENERAL
1.1 SUMMARY
A. The Contractor shall protect all existing utilities and all other improvements not designated for removal and shall restore damaged or temporarily relocated utilities and improvements to a condition equal to or better than they were prior to such damage or temporary relocation, all in accordance with requirements of the Contract Documents.
B. The Contractor shall verify the exact locations and depths of all utilities shown and the Contractor shall make exploratory excavations of all utilities that may interfere with the Work. All such exploratory excavations shall be performed as soon as practical after award of contract and, in any event, a sufficient time in advance of construction to avoid possible delays to the Contractor's work. When such exploratory excavations show the utility location as shown to be in error, the Contractor shall so notify the Engineer, and shall incorporate updated utility locations into the project record drawings.
C. In the event it is necessary to respond with City crew in lieu of the Contractor to repair damages done to any City facilities caused by the Contractor’s operations or as a consequences thereof, there shall be a minimum mobilization cost fee of $500 for administrative overhead, billing and equipment use in addition to the actual hourly overhead rate (including benefits) billed for City employees and any materials costs. The Contractor sha ll be obligated to pay this amount separately to the City prior to the completion of the project and retention payment. The use of City crews will be at the discretion of the City.
D. If a hazardous condition is observed and the City notifies the Contractor either directly or by telephone, the Contractor shall correct the condition immediately. If the Contractor fails to correct the condition immediately, the City reserves the right to call a local supplier(s) or Contractor to install the necessary measures s uch as lights, barricades, etc. The cost involved shall be deducted from any money due (or to become due) to the Contractor.
E. Contractor shall perform a preconstruction photo survey to document the condition of existing improvements. The Contractor shall be responsible to adequately document the condition for size, kind, quantity and the extent of existing improvements. Photographs shall be for the purpose of documenting the pre- existing condition at the site of work. All surveys shall be delivered to the City prior to commencing work. In the absence of adequate preconstruction documentation, the Engineer’s judgment shall be final.
1.2 RIGHTS-OF-WAY
A. The Contractor shall not do any work that would affect any gas, sewer, storm drain,
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-35 Project No. C2203 waterline, recycled waterline, telephone, railroad, or electric line, any fence, or any other structure, nor shall the Contractor enter upon the rights-of-way involved until notified by the Engineer that the City has secured authority therefore from the proper party. After authority has been obtained, the Contractor shall give said party due notice of its intention to begin work, and shall give said party convenient access during the Contractor’s work. When two or more contracts are being executed at one time on the same or adjacent land in such manner that work on one contract may interfere with that on another, the City shall determine the sequence and order of the Work. When the territory of one contract is the necessary or convenient means of access for the execution of another contract, such privilege of access or any other reasonable privilege may be granted by the City to the Contractor so desiring, to the extent, amount, in the manner, and at the times permitted. No such decisions as to the method or time of conducting the Work or the use of territory shall be made the basis of any claim for delay or damage, except as provided for temporary suspension of the Work.
1.3 PROTECTION OF SURVEY MONUMENTS OR ROADWAY MARKERS
A. Monuments placed by Surveyors must be preserved, in accordance with State Business & Professions Code section 8771. The Contractor shall not destroy, remove, or otherwise disturb any existing survey monuments, markers or other existing street or roadway markers without proper authorization. No pavement grinding, breaking or excavation shall be started until all survey or other permanent marker points that will be disturbed by the construction operations have been properly referenced for easy and accurate restoration. It shall be the Contractor's responsibility to notify the proper representatives of the City of the time and location that work will be done. Such notification shall be sufficiently in advance of construction so that there will be no delay due to waiting for survey points to be satisfactorily referenced for restoration.
B. If monuments are disturbed by the Contractor, the Contractor shall hire a licensed surveyor to prepare and process a corner record or record of survey as appropriate through the City to reset the monuments. Surveyor records shall show the position of replacement monuments and post construction position of other monuments within the work area post-construction. The cost of preparing the necessary survey documents, processing the survey documents, and resetting the monuments shall be paid for by the Contractor. This work shall be completed prior to project acceptance and additional monies will be withheld for this work prior to the release of retention.
1.4 RESTORATION OF PAVEMENT
A. General: All paved areas including asphaltic concrete berms cut or damaged during construction shall be replaced with similar materials and of equal thickness to match the existing adjacent undisturbed areas, except where specific resurfacing requirements have been called for in the Contract Documents or in the requirements of the agency issuing the permit. All temporary and perm anent pavement shall conform to the requirements of the affected pavement owner. All pavements which are subject to partial removal shall be neatly saw cut in straight lines.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-36 Project No. C2203
B. Temporary Trench Restoration: Wherever required by the public authorities having jurisdiction, the Contractor shall place temporary surfacing promptly after backfilling and shall maintain such surfacing for the period of time fixed by said authorities before proceeding with the final restoration of improvements. The typical trench detail on the plans provides further information for temporary asphalt surfacing.
C. Permanent Trench Restoration: In order to obtain a satisfactory junction with adjacent surfaces, the Contractor shall saw cut back and trim the edge so as to provide a clean, sound, vertical joint before permanent replacement of an excavated or damaged portion of pavement. Damaged edges of pavement along excavations and elsewhere shall be trimmed back by saw cutting in straight lines.
All pavement restoration and other facilities restoration shall be constructed to finish grades compatible with adjacent undisturbed pavement. The typical trench detail on the plans provides further information for permanent trench restoration.
D. After all infrastructure has been installed and tested, and final approval of all testing has been provided by the City or its representative, the Contractor shall overlay all roadways affected by the Work per the drawings and S pecification 321216, “Paving Systems.”
E. Restoration of Sidewalks or Private Driveways: Wherever sidewalks or private roads have been removed or damaged during construction, the Contractor shall place suitable temporary sidewalks or roadways promptly after backfilling and shall maintain them in satisfactory condition for the period of time fixed by the authorities having jurisdiction over the affected portions before proceeding with the final restoration or, if no such period of times is so fixed, the Contr actor shall maintain said temporary sidewalks or roadways until the final restoration thereof has been made.
1.5 EXISTING UTILITIES AND IMPROVEMENTS
A. General: The Contractor shall protect all Underground Utilities and other improvements which may be impaired during construction operations. It shall be the Contractor's responsibility to ascertain the actual location of all existing utilities and other improvements that will be encountered in its construction operations, and to see that such utilities or other improvements are adequately protected from damage due to such operations. The Contractor shall take all possible precautions for the protection of utility lines to provide for uninterrupted service and to provide such special protection as may be necessary. Protection of existing utilities may include soil stabilization.
B. Culverts: Existing culverts in and adjacent to the work area shall be protected from disturbance by the Contractor’s activities relating to the Work. The Engineer shall be notified immediately if an existing culvert is disturbed as a result of construction activities. All costs associated with disturbing existing culverts shall be borne by the Contractor.
C. Utilities to be Moved: In case it shall be necessary to move the property of any public utility or franchise holder, such utility company or franchise holder will, upon
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-37 Project No. C2203 request of the Contractor, be notified by the City to move such property within a specified reasonable time. When utility lines that are to be removed are encountered within the area of operations, the Contractor shall notify the Engineer a sufficient time in advance for the necessary measures to be taken to prevent interruption of service.
D. Where the proper completion of the Work requires the temporary or permanent removal and/or relocation of an existing utility or other improvement which is shown the Contractor shall remove and, without unnecessary delay, tempor arily replace or relocate such utility or the facility. In all cases of such temporary removal or relocation, restoration to former location shall be accomplished by the Contractor in a manner that will restore or replace the utility or improvement to its former location and in new condition.
E. City's Right of Access: The right is reserved to the City and to the owners of public utilities and franchises to enter at any time upon any public street, alley, right-of- way, or easement for the purpose of making changes in their property made necessary by the Work of this Contract.
F. Underground Utilities Shown or Indicated: Existing utility lines that are shown or the locations of which are made known to the Contractor prior to excavation and that are to be retained, and all utility lines that are constructed during excavation operations shall be protected from damage during excavation and backfilling and, if damaged, shall be immediately repaired by the Contractor.
G. Underground Utilities Not Shown or Indicated: Contractor is responsible to verify location of all utilities, whether shown in the plans or not. All costs for locating, replacement and/or repair of existing utilities shall be borne by the Contractor.
H. In the event that the Contractor damages any existing utility lines, a written report thereof shall be made immediately to the Engineer.
I. All water services that are damaged during construction of trenching operations shall be reconstructed from the corporation stop to the meter (for small diameter services or reconstructed from the gate valve to the meter (for larger diameter services), and all services shall be sleeved with PVC pipe prior to backfilling.
J. Approval of Repairs: All repairs to a damaged improvement are subject to inspection and approval by an authorized representative of the improvement owner before being concealed by backfill or other work.
K. Maintaining in Service: All oil and gasoline pipelines, power, and telephone or other communication cable ducts, gas and water mains, irrigation lines, sewer lines, storm drain lines, poles, and overhead power and communication wires and cables encountered along the line of the Work shall remain continuously in service during all the operations under the Contract, unless other arrangements satisfactory to the Engineer are made with the owner of said pipelines, duct, main, irrigation line, sewer, storm drain, pole, or wire or cable. The Contractor shall be responsible for and shall repair all damage due to the Contractor’s operations, and the provisions of this Section shall not be abated even in the event such damage occurs after backfilling or is not discovered until after completion of the backfilling.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-38 Project No. C2203
L. Pipeline Connections. The Contractor shall make all necessary connections to the existing pipelines. No connections to the existing system shall be made unless authorized in writing by the City or Engineer.
M. Repair couplings on sanitary sewer laterals and water services are not allowed. All repairs shall be completed to the nearest existing pipe joint, asbestos cement (ACP) sanitary sewer laterals shall be taken back to the nearest existing joint and shall not be cut ACP. All removed pipe material shall be disposed of by the Contractor per State and local requirements. All costs for disposal of existing materials shall be borne by the Contractor.
1.6 TREES WITHIN STREET RIGHTS-OF-WAY AND PROJECT LIMITS
A. General: The Contractor shall exercise all necessary precautions so as not to damage or destroy any trees or shrubs, including those lying within street rights - of-way and project limits, and shall not trim or remove any trees unless such trees have been approved for trimming or removal by the City or other jurisdictional agency. All existing trees and shrubs which are damaged during construction shall be trimmed or replaced by the Contractor under the directions of an arborist certified by the Western Chapter of the International Society of Arboriculture hired by the Contractor or a certified tree company hired by the Contractor to the satisfaction of the City and/or agency. Tree trimming and replacement shall be accomplished in accordance with the following paragraphs.
B. Trimming: The natural shape and form of the tree shall be preserved and enhanced; no stubs or splits or torn branches left; no topping or drop crotching; and clean cuts shall be made close to the trunk or large branches.
C. Replacement: The Contractor shall immediately notify the City and/or other jurisdictional agency if any tree is damaged by the Contractor's operations. If, in the opinion of the City or said other agency, the damage is such that replacement is necessary, the Contractor shall replace the tree at its own expense. The size of the trees shall be not less than 1-inch diameter nor less than 6 feet in height. Fines will be assessed against the Contractor for trees removed without the City's prior written approval. The minimum amount of fine or restitution to the City will be the replacement of the tree removed, with one of equal or greater size and maturity and as approved by the City. Larger fines may be assessed against the Contractor depending upon the circumstances and type of tree removed, especially in the case of oak trees, and/or those trees listed on the City of San Carlos' and/or County of San Mateo’s Historical Tree Lists.
D. Any roots encountered greater than 2-inches in diameter shall be performed under the direct supervision of and in conformance with the recommendations of an arborist certified by the Western Chapter of the International Society of Arboriculture.
E. The Contractor shall furnish all tools and equipment and employ sufficient trained personnel to operate all equi pment and perform all handwork efficiently and skillfully.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-39 Project No. C2203
F. The Contractor shall be held responsible for any damage to trees, vegetation, or private property caused by its construction operations.
1.7 NOTIFICATION BY THE CONTRACTOR
A. Prior to any excavation in the vicinity of any existing underground facilities, including all water, sewer, storm drain, gas, petroleum products, or other pipelines; all buried electric power, communications, or television cables; all traffic signal and street lighting facilities; and all roadway and state highway rights-of-way the Contractor shall notify the Underground Service Alert agency and the respective authorities representing the owners or agencies responsible for such underground facilities not less than 48 hours prior to excavation so that a representative of said owners or agencies can be present during such work if they so desire.
PART 2 PRODUCTS
Not Used.
PART 3 EXECUTION
Not Used.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-40 Project No. C2203 SECTION 020010 – SITE CONDITIONS
PART 1 GENERAL
1.1 INFORMATION ON SITE CONDITIONS
A. Information obtained by the City regarding site conditions, subsurface information, existing construction of site facilities and similar data will be available to prospective Bidders upon request at the office of the Engineer, prior to bid opening. This geotechnical investigation is not a part of this Contract. The investigation was performed for design purposes.
B. Investigations conducted by Geotechnical Engineer of subsurface conditions were made for the purpose of study and design, and neither the Engineer nor the City assume any responsibility in respect to the sufficiency or accuracy of the soil borings, or of other investigations that have been made, or of the interpretations made thereof, and there is no warranty or guarantee, either expressed or implied, that the conditions indicated by such investigations are representative of those existing throughout such area, or any part thereof, or that unforeseen for developments may not occur.
C. Any logs of test borings, pits, geotechnical reports, or topographic maps showing a record of the data obtained by the Engineer's investigations of surface and subsurface conditions that are made available, shown on the plans, or bound herewith shall not be considered a part of the Contract Documents, said logs representing only the opinion of the Engineer as to the character of the materials encountered by him/her in their investigations and are provided only for the convenience of the Bidders.
D. Information derived from inspection of logs of test borings, pits, topographic maps, geotechnical reports, or from Plans showing locations of utilities and structures will not in any way relieve the Contractor from any risk, or from properly examining the site and making such additional investigations as he or she may elect, or from properly fulfilling all the terms of the Contract Documents.
1.2 CONTRACTOR'S RESPONSIBILITIES
A. The Contractor shall satisfy himself/herself as to the nature and location of the Work, the general and local conditions, particularly those bearing upon availability of transportation, disposal, limited access to site, handling and storage of materials, availability of labor, water, electric power, roads, and uncertainties of weather, river stages, or similar physical conditions at the site, the conformation and conditions of the ground, the character of equipment facilities needed preliminary to and during the prosecution of the Work and all other matters which can in any way affect the Work or the cost thereof under this Contract.
B. The Contractor shall further satisfy himself/herself as to the character, quality, and quantity of surface and subsurface materials to be encountered during the course of execution of the work by inspecting the site as well as, any exploratory work performed by the Engineer, and information presented by the Plans and
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-41 Project No. C2203 Specifications made a part of this Contract. Any failure by the Contractor to acquaint himself/herself with all available information will not relieve him /her from responsibility for properly estimating the difficulty or cost of successfully performing the Work. The Contractor shall use their own judgment in determining methods for safe construction, with awareness of the specific site conditions for this project.
C. The Contractor shall anticipate underground obstructions such as utility lines, concrete, water table, soil conditions and debris. No extra payment will be allowed for the removal, replacement, repair or possible increased cost associated with existing utilities, trench instability or groundwater. Any utility lines or obstructions indicated on the map show only the approximate location and must be verified in the field by the Contractor. Even excavations that do not daylight into the limits of existing trench backfill can become unstable due to the effects of ground disturbance and reduced strength caused by past nearby excavations and backfills. The Contractor is responsible for locating all underground obstructions.
D. The Contractor shall note that heavy truck and equipment operations may cause roadway damage in excess of normal usage. Damage caused to the streets, curbs, gutters, sidewalks or bike path by the Contractor's operations shall be repaired to a condition equal or better than the original condition at the Contractor's expense.
1.3 ADDITIONAL INFORMATION
A. Prior to bidding, Bidders may make their own subsurface investigations subject to time schedules and arrangements approved in advance by the City. Before any subsurface test holes are excavated, obtain necessary permits to perform such work.
B. Record drawings of existing utilities are available for examination at City offices.
1.4 SURFACE FACILITIES
A. The Contractor is advised that the Plans were prepared based on available information and, therefore, all existing surface facilities may not be shown on the Plans. It is the Contractor's responsibility to acquaint themselves with existing site conditions per this Section and anticipate those surface facilities which are typically encountered (fences, signs, mailboxes, sidewalks, driveways, ditches, AC pavement, AC dikes, curbing, power poles, overhead lines, landscaping, irrigation, etc.) and will affect the Work. The Contractor shall provide adequate security to protect the public and Work. No extra payment will be made to the Contractor for the repair, removal and replacement of such facilities. Full payment for this work shall be as included in the various bid items.
PART 2 PRODUCTS
Not Used.
PART 3 EXECUTION
Not Used.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-42 Project No. C2203 SECTION 020030 – EXISTING UTILITIES AND UNDERGROUND STRUCTURES
PART 1 GENERAL
1.1 SECTION INCLUDES
A. Refer to plans for the locations of utilities and underground structures.
B. Contractor’s responsibilities.
1.2 CALIFORNIA ADMINISTRATIVE CODE
A. Section 1540(a)1 of Construction Safety Orders (Title 8) California Administrative Code, section 1540 states:
(1) “Prior to opening and excavation, effort shall be made to determine whether underground installations; i.e., sewer, water, gas, electric lines, storm drain, cable TV, telephone, and fiber optics, will be encountered and, if so, where such underground installations are located. When an excavation approaches the approximate location of such an installation, the exact location shall be determined by careful probing or hand digging; and, when it is uncovered, adequate protection shall be provided for the existing installation. All known owners of underground facilities in the area concerned shall be advised of proposed work at least 48 hours prior to the start of actual excavation.”
B. The approximate location of public utilities and underground structures was based on information provided by the utility owners. However, in accordance with California's Administrative Code, Section 1540, Contractor shall make the effort to determine the exact location of underground installations.
1.3 PUBLIC UTILITIES AFFECTED
A. Electrical: Pacific Gas & Electric Company. It should be noted that where overhead service to a structure known to receive service does not exist, then underground service shall be assumed to exist. For underground utility location call Underground Service Alert (USA) at (800) 227-2600 or 811 at least two working days in advance.
B. Natural Gas: Pacific Gas & Electric Company has jurisdiction over natural gas lines. For underground utility location call Underground Service Alert (USA) at (800) 227-2600 or 811 at least two working days in advance.
C. Water Service: California Water Service Company and Mid-Peninsula Water District have jurisdiction over water mains and services within the specific limits of the project corridor.
D. Drainage: The City of San Carlos has jurisdiction over drainage within the corporate limits of San Carlos.
E. Roads: The City of San Carlos has jurisdiction over roads inside the corporate limits
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-43 Project No. C2203 of San Carlos and the County of San Mateo for roads outside the corporate limits of San Carlos.
F. Cable Television: Comcast. It should be noted that where overhead service to a structure known to receive service does not exist, then underground service shall be assumed to exist. For underground utility location, call USA at (800) 227-2600 or 811 at least two working days in advance.
G. Telephone: AT&T. It should be noted that where overhead service to a structure known to receive service does not exist, then underground service shall be assumed to exist. For assistance with location of underground telephone facilities, call USA at (800) 227-2600 or 811 at least two working days in advance.
H. Sanitary Sewer: The City of San Carlos has jurisdiction over the sewer mains and laterals within the specific limits of the project corridor.
I. Recycled Water: The City of San Carlos has jurisdiction over the recycled water mains and laterals within the specific limits of the project corridor.
1.4 CONTRACTOR RESPONSIBILITY
A. The Contractor shall anticipate water, reclaimed water, sewer, storm drain, electrical, gas, cable TV, and telephone services. It may be expected that there will be variation in location from that as shown on the Plans to the actual location. Actual location shall be determined in the field after pre-marking by the various utilities affected.
B. It should be understood that the various utilities are indicated on the Plans to show only the approximate location and must be verified in the field by the Contractor. The various utility agencies will cooperate with the Contractor to endeavor to familiarize him/her with all known underground utility obstructions, but this will not relieve the Contractor from full responsibility in anticipating and locating their actual existence.
No extra payment will be allowed for the removal, replacement, repair, or possible increased cost caused by inadvertent or planned interception and breaking of underground obstructions which may exist.
PART 2 PRODUCTS
Not Used.
PART 3 EXECUTION
Not Used
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-44 Project No. C2203 SECTION 021100 – SITE PREPARATION
PART 1 GENERAL
1.1 SECTION INCLUDES
A. Remove and dispose of surface debris.
B. Prior to any excavation, obtain permission from the City, PG&E and/or any other affected utility providers to penetrate or excavate surfaces along the project route.
Remove and dispose of paving, curbs, gutters, fences, posts, or structures indicated on the drawings.
C. Soil stabilization.
1.2 RELATED SECTIONS
A. Section 013100 – Coordination
B. Section 015600 – Protection of Existing Facilities
1.3 REGULATORY REQUIREMENTS
A. Conform to applicable codes and all local, state and federal regulations for disposal of debris and use of herbicides. Burning of debris, lumber or scrap will not be permitted.
PART 2 PRODUCTS
2.1 MATERIALS
A. Not used.
PART 3 EXECUTION
3.1 PREPARATION
A. Sawcut paving, curbs gutters and other structures between portion to remain and portion to be removed.
3.2 OTHER IMPROVEMENTS
A. Protect trees, plant growth, and features designated to remain, as final landscaping.
B. Protect bench marks and existing structures which are to remain from damage or displacement.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-45 Project No. C2203
3.3 REMOVAL
A. Remove debris, rock, soil and extracted plant life from site. Dispose of materials at approved facilities.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-46 Project No. C2203 SECTION 024100 - DEMOLITION
PART 1. GENERAL
1.1 SUMMARY
A. Section Includes:
Demolition & Permits
Removal and Disposal
Recycling & Salvaging
1.2 UNIT PRICE - MEASUREMENT AND PAYMENT
A. Demolition:
1. Basis of Measurement: Not a measured item, unless specified otherwise on the Drawings.
2. Basis of Payment: The cost of any works that relevant to demolition shall be considered as included in the contract prices for the various contract items of work involved, and no additional compensation shall be allowed therefor.
1.3 REFERENCES & RELATED WORK SPECIFIED ELSWHERE
A. Bay Area Air Quality Management District (BAAQMD) – http://www.baaqmd.gov/
1. Regulation 11 (Hazardous Pollutants) and Rule 2 (Asbestos Demolition, Renovation, and Manufacturing).
B. CALGreen Construction Waste Management Requirements
1. http://www.calrecycle.ca.gov/LGCentral/Library/CandDModel/Instruction/CALGreen Tbl.pdf
C. California Occupational Safety and Health (Cal/OSHA)
1. General Requirements
D. Commercial
1. USA Underground Service Alert
E. Division 1
1. General Requirements
1.4 SUBMITTALS
A. Section 013300 - Submittal Procedures: Requirements for submittals.
B. The Contractor shall submit to the City a haul route for approval, prior to commencing any work. Truck traffic movement is limited between the hours of 9am to 3pm, unless approved by the Project Manager.
C. Before disposing of any demolished material prior to any work
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-47 Project No. C2203
1. Submit a written agreement from the property owner
a. For the use of the property
b. absolving the City from responsibility in connection with the property.
2. Obtain authorization to start
D. Before Contract acceptance, submit a document signed by the owner of the material disposal site stating that the Contrac tor has complied with the Contractor -Owner agreement.
E. Demolition Schedule: The Contractor shall submit a complete coordination schedule for demolition work including shut-off and continuation of utility services prior to start of the work. The schedule shall indicate proposed methods and operations of facility demolition, and provide a detailed sequence of demolition and removal work to ensure uninterrupted operation of occupied areas.
F. All affected private properties will receive door hanger notices as s pecified in Section 015050 “Mobilization” prior to any utility shutoffs or frontage demolition and improvements.
1.5 JOB SITE CONDITIONS
A. The Contractor shall visit the site and inspect the existing facilities. The City assumes no responsibility for actual condition of facilities to be demolished.
B. Contractor shall use all means necessary to prevent the spread of dust during performance of the work. Thoroughly moisten all surfaces as required to prevent the generation of dust.
No washing of streets is permitted.
C. All liquid, and slurry generated during pavement sawcutting shall be collected and removed from the site. These liquids shall not be washed into the area storm drainage system.
D. Contractor shall remove hazardous materials as described per the Project As bestos and Lead Inspection Report.
E. The Contractor prior to the commencement of the demolition or renovation, thoroughly inspect the affected facility or part of the facility where the demolition or renovation operation will occur for the presence of asbestos, including Category I and Category II nonfriable Asbestos Containing Materials (ACM).
F. The Contractor must also provide the Environmental Protection Agency (EPA) with a 10 working day advance notice for any disturbance of Regulated Asbestos -Containing Material (RACM) greater than 160 square feet or 260 lineal feet, and as specified in Code of Federal Regulations (CFR) Title 40, Chapter I, Subchapter C, Part 61, Subpart M, Section 61.145.
PART 2. PRODUCTS (NOT USED)
PART 3. EXECUTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-48 Project No. C2203
1.6 INSTALLATION
A. Notify anyone to be affected by demolition and construction activities including but not limited to: all schools, residences, businesses, garbage collection, utility companies (PG&E-Gas Distribution, PG&E Gas Transmission, PG&E-Electric, AT&T, Comcast, etc.), the Owner, etc. at least ten (10) working days prior to commencing the work of this section.
B. Site Inspection:
1. Prior to all work of this section, carefully inspect the site and all objects designated to be removed and to be preserved.
2. Locate all existing active utility lines traversing the site and determine the requirements for their removal and/or protection.
C. Clarification:
1. The Drawings do not purport to show all objects existing on the site.
2. Before commencing the work of this section, verify with the Ow ner all objects to be removed and all objects to be preserved
D. Scheduling:
1. Schedule all work in a careful manner with all necessary consideration for neighbors, operation of the existing facilities, and the public.
2. Avoid interference with the use of, and passage to and from, residences and adjacent facilities.
E. Protection of Utilities: Preserve in operating condition all active utilities traversing the site and designated to remain.
1.7 WATER POLLUTION CONTROL
A. Water sprinkling, temporary enclosures, chutes and other suitable methods shall be used to limit dust and dirt rising and scattering in the air. The Contractor shall comply with all government regulations pertaining to environmental protection.
B. The Contractor shall use equipment that will generate the least amount of dust. The Contractor shall provide dust control at all times including Saturdays, Sundays, and holidays unless directed otherwise by the Project Manager.
C. Whenever the Contractor, in the opinion of the Project Manager, is negligent in controlling dust, the Project Manager may direct attention to the existence of a dust hazard and instruct the Contractor to immediately alleviate the dust hazard. The Contractor shall be responsible for any damage cause by dust generated as a result of the Contractor’s operations.
D. The Contractor shall have a commercial standard street vacuum/sweeper operational and in operation during each working day. The street vacuum/sweeper shall be able to pick up sand, gravel, dust, and debris, and other things, shall minimize dust generation, and shall also be available during the day and shall sweep as outlined below and as directed by the Project Manager.
E. If the Contractor is performing work that generates dust and debris then during the day (including weekends and holiday s) the sweeper shall sweep the project area (full length,
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-49 Project No. C2203 width, and all lanes) twice a day sometime between 9:00a.m. and 11:00a.m. and also between 2:00p.m. and 4:00p.m. Hardscape surfaces (including pavers, sidewalks, and areas inaccessible by a mechanical sweeper) shall have dirt, dust, and debris removed by hand sweeping. If the Contractor fails to fulfill the responsibilities of this section, the City will perform or contract with others to perform the work and all costs incurred to the City shall be withheld from future payments to the Contractor.
F. The Contractor shall clean the sidewalk and gutter as many times as needed to make sure the sidewalk and gutter are out of dirt, debris and small rocks at all times. The Contractor shall be prepared to sw eep surfaces immediately at the request of the Project Manager, should the Project Manager deem it necessary for public safety and to avoid damage to properties. If streets are not satisfactorily cleaned within 12 hours from verbal or written notice by City personnel, the City will hire an independent sweeping company and deduct the cost for such work from payments due to the Contractor.
G. Water shall not be used in a manner that creates hazardous or objectionable conditions such as ice, flooding, or pollution.
H. The site shall be kept neat and orderly during the demolition to the maximum extent practical.
I. Public right-of-way and private property shall be kept free of debris at all times.
J. Stockpiles of demolished items or materials shall be removed from the site on a daily basis or stored in waste containers which shall be emptied on a weekly basis or as conditions require in order to manage the accumulation of waste.
K. Accumulations of flammable materials shall not be permitted.
1.8 PROTECTION
A. Safe passage of persons around area of demolition shall be provided in accordance with all safety and regulatory requirements. Operations shall be conducted to prevent damage to adjacent buildings, structures, other facilities, people and property. Safe passage provided by Contractor will be ADA complaint.
B. Interior and exterior shoring, bracing, or supports shall be provided to prevent movement, settlement or collapse of structures to be demolished and to adjacent facilities to remain.
C. Existing landscaping materials, structures, and appurtenances which are not to be demolished shall be protected and maintained as necessary.
D. The Contractor shall repair any landscaping and irrigation system removed or damaged as a result of the Contractor's operation or where proposed improvements are a conflict.
Active irrigation lines necessary for landscaping shall be relocated and made operational within 48 hours of their removal.
E. The Contractor shall protect and maintain conduits, drains, sewers, pipes and wires that are not to be demolished.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-50 Project No. C2203 F. Use all means necessary to protect existing objects designated to remain or to be preserved must remain operational during installation of the replacement pipeline. In the event of damage, immediately notify the Owner and make all repairs and replacements necessary for approval by the Owner at no additional cost to the Owner.
1.9 SURFACE DEMOLITION
A. All asphalt concrete and all Portland cement concrete curbs, gutters, sidewalks, access ramps and driveways shall be saw-cut at the nearest scoreline or deep joint and removed entirely to the saw-cut limits.
B. Where adjacent pavement or concrete is broken or damaged sufficiently to prohibit a sound replacement the entire damaged section shall be removed to the limits determined by the Project Manager.
C. Asphalt concrete, sidewalk, concrete curb, and gutter materials to be demolished shall be broken up and removed from the site by the Contractor at no additional cost to the City.
D. Where shown on the Drawings, the Contractor shall remove required pavement section including base material. Subsoil removal is also included where required to achieve design subgrade.
1.10 DEMOLITION BELOW THE SURFACE
A. Existing structur es, pavement slabs and structural sections to be abandoned shall be demolished to an elevation three feet below finished grade. Their bottoms (if any remain) shall be broken thoroughly to prevent entrapment of water and all voids backfilled with suitable backfill
B. Demolition areas and voids resulting from demolition of structures below the surface shall be completely filled.
C. All fill, compaction, and holes created by demolition work shall be backfilled with imported clean fill. Lay fill down in layers not exceeding 6” thickness and compact per the earthwork specifications. Grade the site to drain to the nearest storm drainage system without any low points.
D. All fill and compaction surfaces shall be graded to meet adjacent contours and to provide flow to surface drainage structures, or as shown on the Drawings.
E. Pipes to be demolished that require no future connection shall be removed to the extent required, sealed and capped. Pipe sections shall be removed by removing a complete pipe section to an existing joint, or other adequate means which results in a clean joint.
F. The Contractor shall demolish or dismantle and remove all items that are noted for demolition and removal in the Contract Documents and that will interfere with the planned construction, or as otherwise directed by the Project Manager.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-51 Project No. C2203 G. The Contractor shall demolish or dismantle and remove all abandoned conduits or structures that are encountered during the prosecution of the work and which interfere with the construction of the work upon the approval of the Project Manager.
1.11 REMOVAL OF EXISTING WATER AND SEWER SERVICES
A. GENERAL ABANDONMENT:
1. When salvage materials are shown on the Drawings; salvage and arrange the existing facilities (i.e., meters, manhole covers, manhole frames, etc.) to be dropped off at the City's Corporation Yard by prior arrangement.
2. Properly remove or abandon in place unused existing City utility service lines discovered that were left in place by others.
3. Contact utility companies for removal, abandonment, adjustment or relocation of their facilities.
4. Contractor is responsible for verifying the location of any existing utilities.
5. Abandonment of pipes will include filling pipe with slurry as specified in Section 19-
3.02G – Controlled Low-Strength Material of the State Standard Specification and capping the pipes at the ends.
1.12 DISPOSAL OF DEMOLISHED MATERIALS
A. Demolition and removal of debris shall be conducted to ensure minimum interference with roads, streets, walks and other adjacent occupied or used facilities which shall not be closed or obstructed without permission from the City. Alternate routes shall be provided to circumvent closed or obstructed traffic ways.
B. The Contractor shall comply with all pertinent regulations of Cal/OSHA and local codes and practices.
C. All existing materials that are designated to be salvaged shall be removed, cleaned and hauled to the City Corporation Yard, unloaded and stockpiled unless otherwise directed by the Project Manager.
D. Site debris, rubbish and other materials resulting from demolition operations shall become the property of the Contractor and shall be removed by the Contractor at the Contractor's expense. The proper and legal disposal of demolished materials shall be the responsibility of the Contractor. All disposal sites and recycling facilities shall be approved by the City prior to initiation of the Work.
1. Concrete debris shall be transported to a recycler of such materials.
2. Hazardous materials shall be handled and disposed of in accordance with all applicable laws, codes, and regulations.
1.13 PATCHING AND REPAIRING
A. The Contractor shall provide patching, replacing, repairing and refinishing of damaged areas or damaged adjacent facilities involved in the demolition.
B. New concrete shall match the existing adjacent surfaces, in kind, or of better quality, to the satisfaction of the Project Manager, at no cost to the City or to the owners of the facilities.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-52 Project No. C2203
1.14 CLEAN UP
A. During and upon completion of work the Contractor shall promptly remove unused tools and equipment, surplus materials, rubbish, debris and dust and shall leave areas affected by work in a clean, approved condition.
B. The Contractor shall clean adjacent structures and facilities of dust, dirt and debris caused by demolition, as directed by the Project Manager, and return adjacent ar eas to condition existing prior to start of work.
C. The Contractor shall clean and sweep daily all street and roads affected by its operation.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-53 Project No. C2203 SECTION 310513 – CLEARING & GRUBBING, EXCAVATION, AND EARTHWORK
PART 1. GENERAL
1.1 SUMMARY
A. Section Includes:
1. Clearing and Grubbing
2. Excavation
3. Earthwork
4. Grading and Compaction
5. Subsoil materials – Import Fill and Select Fill
6. Topsoil materials.
B. Related Sections:
1. Project Geotechnical report; bore hole locations and findings of subsurface materials if applicable.
1.2 REFERENCES
A. American Association of State Highway and Transportation Officials:
1. AASHTO T180 - Standard Specification for Moisture-Density Relations of Soils Using a 4.54-kg (10-lb) Rammer and a 457-mm (18-in.) Drop.
B. ASTM International:
1. ASTM D698 - Standard Test Method for Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft-lbf/ft3).
2. ASTM D1557 - Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3).
3. ASTM D2487 - Standard Classification of Soils for Engineering Purposes (Unified Soil Classification System).
C. California Building Code – Appendix J - Grading
D. State Standard Specifications:
1. Section 14 – Environmental Stewardship
2. Section 17 - General
3. Section 19 – Earthwork
1.3 SUBMITTALS
A. Section 013300 - Submittal Procedures: Requirements for submittals.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-54 Project No. C2203 B. Samples: Submit results of the soil samples by a certified testing laboratory prior to importing onto the site for approval by the Project Manager.
C. Materials Source: Submit name of imported materials source.
D. Manufacturer's Certificate: Certify Products meet or exceed specified requirements.
1.4 QUALITY ASSURANCE
A. Furnish each subsoil material from single source throughout the Work.
PART 2. PRODUCTS
2.1 SUSTAINABILITY CHARACTERISTICS
A. Materials and Resources Characteristics:
1. Regional Materials: Furnish materials extracted, processed, and manufactured within 250 miles of jobsite.
2.2 SUBSOIL MATERIALS
A. Select Fill Material:
1. Subsoil material is on-site excavated material.
2. Graded
3. Non-hazardous
4. Free of lumps larger than three (3) inches, rocks larger than two (2) inches, organic matter, frozen or other deleterious materials and debris.
5. Selected material encountered in excavation within the right of way shall be used for finishing the top portion of the roadbed, constructing shoulders, structure backfill; as shown on the Drawings; as specified in the Special Provisions, or as directed by the Project Manager.
B. Import Fill Material:
1. Subsoil material imported from sources outside the project site meeting.
2. Graded
3. Non-hazardous
4. Free of lumps larger than three (3) inches, rocks larger than two (2) inches, organic matter, frozen or other deleterious materials and debris.
5. Unless otherwise specified, the Contractor shall obtain from the owners the right to procure material, pay all royalties and other charges involved, and bear all expense of developing the sources, including rights of way for hauling.
6. No import fill material shall be delivered to the site until approv ed by the Project Manager. Approval of import fill material shall be based on the testing of representative samples submitted by the contractor meeting the appurtenant Geotechnical Report and approved by the Project Manager. Such representative
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-55 Project No. C2203 samples shall be submitted to the Project Manager not less than 15 days prior to commencing the work.
7. Imported fill, delivered to the site, that significantly differs from the submitted samples shall be subject to rejection. Rejected materials shall be removed from the site at the Contractor's expense
8. Approval of a particular import fill material shall constitute approval of only that portion of the proposed borrow source represented by the submitted sample.
9. Except as otherwise permitted, borrow pits and other excavation areas shall be excavated in such manner as will afford adequate drainage. Overburden and other spoil material shall be transported to designated spoil areas or otherwise disposed of as directed, local borrow pits shall be neatly trimmed and left in such shape as will facilitate accurate measurement after the excavation is completed.
2.3 FILL MATERIALS:
A. Fill material shall conform to the following as determined by ASTM C 117 and ASTM C 136:
1. Maximum particle size 3 inches
2. Percent passing 1-inch sieve 90-100 percent
3. Percent passing No. 200 sieve less than 20 percent
B. Imported non-expansive fill shall consist of a well -graded, slightly cohesive soil with relatively impervious characteristics when compacted.
C. Plasticity Index for acceptable import fill materials shall be a maximum of 15 when determined by the procedure set forth in ASTM D 4318.
D. The liquid limit shall not exceed 40 percent as determined by the procedures set forth in ASTM D 4318.
E. Import fill material shall have an R-value of 25 or greater as determined by ASTM D 2844.
2.4 TOPSOIL MATERIALS
A. Topsoil shall be imported top soil.
B. Topsoil excavated within the limits of the project, as approved by the Engineer, will be considered as a material only for the purpose of backfilling areas to be planted.
2.5 SOURCE QUALITY CONTROL
A. Testing and Analysis of Subsoil and Topsoil Materials: Perform in accordance with ASTM D698, ASTM D1557, and AASHTO T180.
B. When tests indicate materials do not meet specified requirements, provide alternate materials and retest.
C. Furnish materials of each type from same source throughout the Work.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-56 Project No. C2203 PART 3. EXECUTION
3.1 PREPARATION
A. Call USA not less than two (2) working days before performing Work that can be marked by USA in a timely manner.
B. Request underground utilities to be located and marked within and surrounding construction areas.
C. Identify required lines, levels, contours and datum.
D. Notify utility companies to remove and relocate utilities where shown on the Drawings.
E. Protect utilities indicated to remain from damage.
F. Protect plant life, lawns, and other features remaining as portion of final landscaping.
G. Protect benchmarks or monuments, survey control points, existing structures, fences, sidewalks, paving, and curbs from excavating equipment and vehicular traffic.
H. The ground shall be prepared to received select fill by removing vegetation, topsoil and other unsuitable materials, scarifying the ground to provide a bond with the fill material, and compacting the fill at optimum moisture content.
3.2 CLEARING AND GRUBBING
A. Clearing and grubbing shall be per Section 17 -2 Clearing and Grubbing of the State Standard Specifications.
B. Clear and grub before performing earthwork in an area.
C. Do not injure standing trees, plants, and improvements shown to be protected.
D. Clear and grub the entire length of the job site to the following widths:
1. 5 feet outside of excavation and embankment slope lines where slopes are not rounded
2. Outside limits of slopes where slopes are rounded
3. 5 feet outside of structures
4. 2 feet outside of slope lines for ditches and channels with a bottom width of less than 12 feet
5. 5 feet outside of slope lines for ditches and channels with a bottom width of 12 feet or more
E. Clearing and grubbing shall consist of removing all objectionable material from within the limits of the project. The limits of clearing and grubbing shall be of sufficient area and depth to complete the work shown on the Drawings or as described herein in.
F. Clear all construction areas above original ground of the following to a minimum depth of eight (8) inches below subgrade or eight (8) inches below original ground, or as required by the appurtenant geotechnical report, whichever is lower:
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-57 Project No. C2203
1. all vegetation such as trees, logs, upturned stumps, roots of downed trees, brush, grass, and weeds and
2. other objectionable material including concrete, masonry, and debris.
G. No burning of materials is allowed.
H. The site shall be stripped and cleared of all vegetation, debris, and organic -laden top soil as required by the Engineer.
I. Trees within the limits of work including any traffic control work beyond the limits of work and within the area of influence shall be evaluated by the City or; a City approved certified Arborist to assess protection measures. No trees will be removed until they have been tagged, numbered and a written release for the tree has been issued by the City.
J. Tree stumps which are designated to be removed, shall be excavated and removed 30” down to remove the tree trunk, roots, and backfill with fill material and compact as required in this section, unless specified otherwise on the Drawings. For tree removal located at Rockridge site, tree removal permit provided for reference in Appendix B.
K. Grub all construction areas to a depth of at least 0.50 feet, necessary to remove all existing tree stumps, roots, buried logs and other objectionable material, unless noted otherwise on the Plans. In embankment areas where the grading plane is 2 feet or more above original ground, cut off trees, stumps, and roots not more than 1 foot above original ground, except, remove trees, stumps, and roots completely where work includes any of the following:
1. Structure construction
2. Pile construction
3. Subdrainage trench excavation
4. Removal of unsuitable material
5. Cutting into slopes of original hillsides, old or new fill
6. Utility line construction
3.3 EXCAVATION
A. Work under this section shall consist of performing all operations necessary to excavate earth and rock, regardless of character and subsurface conditions, from the roadway prism or adjacent thereto, to excavate all materials, of whatever nature, necessary for the construction of foundations for structures and other facilities: to excavate drainage and irrigation ditches; to excavate drainage channels; to excavate selected material and import material for use as specified; to construct embankments including the placing of selected fill or import fill material in connection therewith as specified; to place backfill for structures, and other facilities; to backfill trenches and depressions resulting from the removal of obstructions; to backfill holes, pits and other depressions; to remove and replace unsuitable material; to excavate and grade road approaches, driveways, sidewalks, curb ramps, curb and gutters, plazas, parking lots, and connections; to construct protection dikes; to remove unstable material, slide material which has come into the graded area, and material which has slipped from embankments; all as shown on the plans and as specified in these Specifications and the Special Provisions and as directed by the Project Manager; and furnishing all labor, materials, tools, equipment and incidentals, and for doing all the work that may be required to construct and maintain the project facilities,
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-58 Project No. C2203 except excavation, trenchi ng and backfilling for pipe, culverts, utility systems, and other subsurface pipes.
B. Excavate subsoil and topsoil from areas designated. Strip topsoil to full depth of topsoil in designated areas.
C. Stockpile excavated material meeting requirements for subs oil fill materials and topsoil materials approved by the Project Manager.
D. If practicable and unless processing of material is required, haul selected material directly from the excavation to its final position in the roadway prism and compact it in place.
E. Excavate to the described or authorized grade. If the Contractor over excavates, backfill with an authorized material and compact it at the Contractor’s own expense.
F. Do not excavate wet subsoil unless directed by the Project Manager.
G. The temporary slope of cut surfaces shall be no steeper than is safe for the intended use, and shall not be more than one-unit vertical in two units horizontal (50-percent slope) unless approved by the Project Manager or appurtenant geotechnical report.
H. Archaeological Resources : Contractor shall conform to Section 14 – Environmental Stewardship of the State Standard Specifications. If archaeological resources are discovered within or near construction limits, do not disturb the resources and immediately:
1. Stop all work within a 60-foot radius of the discovery
2. Secure the area
3. Notify the Project Manager.
I. City will investigate the discovery. Do not move archaeological resources or take them from the job site. Do not resume work within the radius of discovery until authorized.
J. Environmentally Sensitive Areas (ESA): If an ESA is shown on the Drawings, the boundaries are approximate. Do not enter an ESA unless authorized. If an ESA is breached, immediately:
1. Stop all the work within 60 feet of the ESA boundary
2. Secure the area
3. Notify the Project Manager
If an ESA is damaged, the Project Manager determines the necessary remediation and the party to perform the work. The City deducts the cost for this work from the Contractor bid price.
K. Notify the Project Manager when buried man-made objects are encountered in an excavation as part of the excavation work and wait for direction from Project Manager unless shown on the plans for removal. All surplus material shall be disposed offsite.
L. Remove excess excavated materials, subsoil and topsoil not intended for reuse, from site.
M. Remove excavated materials not meeting requirements for subsoil materials and topsoil materials from site.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-59 Project No. C2203 N. When hauling is done over highways or City streets, and when directed by the Project Manager the loads shall be trimmed and all material removed from shelf areas of vehicles in order to eliminate spilling of material. If directed by the Project Manager, the loads shall be watered down or covered after trimming to eliminate dust.
O. Excavation shall include the satisfactory r emoval and disposition of all materials not classified as rock excavation.
P. Earth and rock, regardless of character and subsurface conditions, shall be excavated to the lines and grades as established by the plans.
Q. All existing materials that are designated to be salvaged shall be removed, cleaned and hauled to the City Corporation Yard, unloaded and stockpiled, by the Contractor unless otherwise directed by the Project Manager.
R. Existing pipes to be abandoned shall be filled with slurry, minimum of thirty (30) feet from either ends of the pipe and capped with concrete at the ends.
S. Existing structures, pavement slabs, and structural sections to be abandoned shall be demolished to an elevation three (3) feet below finished grade, unless specified otherwise on the Drawings. The bottom (if any remains) shall be broken thoroughly to prevent entrapment of water and all voids backfilled with suitable backfill.
T. Operations shall be conducted in such a manner that existing street, facilities, utilities, railroad tracks and other non-street facilities which are to remain in place will not be damaged.
U. The Contractor, at his /her expense, shall furnish and install -sheet piling, cribbing, bulkheads, shores or whatever means may be necessary to adequately support material carrying such facilities, or to support the facilities themselves, and shall maintain such supports until they are no longer needed. Temporary pavements, facilities, utilities and installations shall also be protected until they are no longer required. When temporary supports and other protective means are no longer required, they shall become the property of the Contractor and shall be removed and disposed of from the job site V. Prior to placing import fill material, all areas to receive fill shall be scarified and compacted.
Unless otherwise stated in the appurtenant Geotechnical report, the area shall be scarified to a minimum of eight (8) inches, material shall be moisture conditioned by wetting or drying to optimum moisture content, and compacted.
3.4 ROCK EXCAVATION
A. Rock excavation shall include excavating, grading, and disposing of materials classified as rock and shall include the satisfactory removal and disposition of rock 1/2 cubic yard or more in volume.
B. No blasting is allowed.
3.5 GRADING
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-60 Project No. C2203 A. Grading shall consist of placing fill materials on site to contours and elevations with select fill or import fill materials.
B. Place fill material in continuous layers of maximum lifts of 8 inches (0.67 feet) and compact in accordance with schedule shown in this section, unless otherwise shown on the appurtenant Geotechnical Report.
C. Maintain optimum moisture content of fill materials to attain required compaction density.
D. Construct slopes to the lines and grades shown on the Drawings.
E. Slope grade away from the building minimum 2% slope for a minimum distance of 10 feet, unless noted otherwise.
F. Make grade changes gradual. Blend slopes into level areas.
G. Round the tops of excavation slopes and ends of excavation.
H. Maintain completed slopes. Repair any slopes damaged by erosion.
I. Repair or replace items indicated to remain that are damaged by excavation or filling.
J. Identify any site low points which need positive drainage and make adjustments with approval from Project Manager prior to pouring concrete.
K. Protection of existing slopes using erosion control measures as required in Section 015723 – Storm Water Pollution Prevention Plan.
3.6 TOLERANCES
A. Section 01 45 16 – Quality Control: Tolerances.
B. Immediately before placing subsequent layers of material, prepare the grading plane such that the grading plane:
1. Does not vary more than 0.05 foot above or below the grade established by the Engineer where Hot Mix Asphalt (HMA) or aggregate base are to be placed.
2. Does not extend above the grade established by the Engineer where concrete base or pavement is to be placed.
3. Beneath structural approach slabs or the thickened portion of sleeper slabs do not extend above the grade established by the Engineer.
4. At any point is within 0.05 foot above the grade established by the Engineer if the material to be placed on the grading plane is paid by the cubic yard.
3.7 COMPACTION
A. Relative compaction specifications apply to material whether in an excavation or an embankment.
B. The moisture content of material to be compacted to at least 95 percent must be such that the specified relative compaction is attained.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-61 Project No. C2203 C. Compact earthwork to a relative compaction of at least 95 percent for at least a depth of:
1. 0.5 foot below the grading plane for the width between the outer edges of shoulders
2. 2.5 feet below the finished grade for the width of the traveled way including any parking lots or other vehicular areas; to extend plus two (2) feet on each side.
D. All fill material shall be compacted to at least 90 percent of maximum density as determined by ASTM D1557, Modified Proctor, beyond the depth specified above in 3.7.C.
3.8 STOCKPILING
A. Stockpile materials on site will not be permitted unless authorized by Project Manager.
3.9 PROTECTION
A. Prevent displacement or loose soil from falling into excavation; maintain soil stability.
B. Protect bottom of excavations and soil adjacent to and beneath foundation from freezing.
C. Protect structures, utilities, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earth operations.
3.10 SLOPES AND FINAL GRADING
A. Slopes - The slope of the ground surfaces, both during and after grading, shall be no steeper than 2 horizontal to 1 vertical, unless otherwise designated on the plans.
B. Finish Grading - Final grades shall conform to the lines and grades shown on the plans.
After completion, excess fill material shall be removed from slopes and the slopes trimmed to expose a dense surface and a uniform finished surface in compacted fill.
C. All non-slope fill surfaces shall be graded smooth, low spots filled in, and the surface sloped for drainage and rolled with rubber -tired equipment to seal it against excessive infiltration of water. Stockpile areas and haul roads shall be restored to the original ground contours and condition using compacted fill. Excess earth and all other unsuitable material shall be removed from the site.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-62 Project No. C2203 SECTION 321123 – AGGREGATE BASE COURSES
PART 1. GENERAL
1.1 SUMMARY
A. Section Includes:
1. Class 2 Aggregate Base course.
B. Related Sections:
1. Section 321216 – Paving Systems
2. Section 321313 - Concrete Improvements.
1.2 UNIT PRICE - MEASUREMENT AND PAYMENT
A. Aggregate Base used under concrete work such as curb and gutter, valley gutter, sidewalk, retaining curbs, etc. shall considered incidental to the item most closely related to and no separate compensation will be allowed therefor.
1.3 REFERENCES
A. American Association of State Highway and Transportation Officials:
1. AASHTO M288 - Standard Specification for Geotextile Specification for Highway Applications.
B. Caltrans Standard Specifications:
1. Section 26 Aggregate Base.
C. CalRecycle
1. http://www.calrecycle.ca.gov/ConDemo/Aggregate/
1.4 SUBMITTALS
A. Section 013300 - Submittal Procedures: Requirements for submittals.
B. Samples: Submit, in air -tight containers, 5 lbs sample of each type of aggregate fill to testing laboratory or as required by the City.
C. Submit aggregate base gradation, R -value requirements, and sand equivalent requirements as specified in this section.
D. Aggregate samples must not be treated with lime, cement, or chemicals before testing for durability index.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-63 Project No. C2203 E. Aggregate from untreated reclaimed processed asphalt concrete, Portland cement concrete, lean concrete base or cement-treated base is not considered treated.
F. If the aggregate gradation test results, sand equivalent test results, or both do not comply with the Contract compliance requirements, remove the aggregate base or request a payment deduction. If the payment deduction request is authorized, $2.00/cu yd is deducted.
G. Materials Source: Submit name of aggregate materials suppliers.
H. Manufacturer's Certificate: Certify products meet or exceed specified requirements.
I. Supplier shall submit certification data that aggregate base meets the requirements per Caltrans Testing Methods.
1.5 SUSTAINABLE DESIGN SUBMITTALS
A. Manufacturer's Certificate: Certify products meet or exceed specified sustainable design requirements.
1. Materials Resources Certificates:
a. Certify source and origin for salvaged and reused products. b. Certify recycled material content for recycled content products. c. Certify source for regional materials and distance from jobsite.
1.6 QUALITY ASSURANCE
A. Furnish each aggregate material from single source throughout the Work.
B. Perform Work according to City Standards.
PART 2. PRODUCTS
2.1 SUSTAINABILITY CHARACTERISTICS
A. Materials and Resources Characteristics:
1. Recycled Content Materials: Furnish materials with maximum available recycled content.
2. Regional Materials: Furnish materials extracted, processed, and manufactured within 250 miles of jobsite.
2.2 AGGREGATE MATERIALS
A. Aggregate must be clean and consist of any combination of the following:
1. Broken Stone
2. Crushed Gravel
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-64 Project No. C2203
3. Natural rough-surfaced gravel
4. Sand
5. Processed reclaimed asphalt concrete, Portland cement concrete, lean concrete base, or cement-treated base.
B. Quality: Aggregate base furnished for the base material shall be free from vegetable matter and other deleterious substances, and shall be of such nature that it can be compacted readily under watering and rolling to form a firm stable base.
C. Maximum aggregate size shall be 3/4-inch maximum aggregate gradation unless specified otherwise.
D. Class 2 Aggregate Base: ASTM D2940; graded type. Conform to Section 26 of the Caltrans Standard Specifications.
PART 3. EXECUTION
3.1 EXAMINATION
A. Verify compacted subgrade is moisture conditioned and ready to support paving and imposed loads.
1. Proof roll subgrade with minimum two perpendicular passes to identify soft spots.
2. Remove soft subgrade and replace with compacted fill unless specified otherwise in the Project Geotechnical Report or as ordered by the Project Manager.
B. Immediately before spreading aggregate base, the subgrade must comply with the specified compaction and elevation tolerance for the material involved and be free from loose or extraneous materials.
C. Contractor may use aggregate base to fill areas of the subgrade that are lower than the proposed grade.
3.2 PREPARATION
A. Correct irregularities in subgrade gradient and elevation by scarifying, moisture conditioning, reshaping, and re-compacting.
B. Do not place fill on soft, muddy, or frozen surfaces.
3.3 AGGREGATE PLACEMENT
A. Spread and shape the aggregate base to such thickness that after watering and compacting, the completed aggregate base is within the tolerances specified below in Section 3.5.
B. Avoid material segregation. Segregated materials shall be re-mixed until uniform.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-65 Project No. C2203 C. Aggregate base must be free from pockets of coarse or fine material.
D. If the aggregate base thickness shown is 0.50 foot or less, spread and compact the aggregate base in one layer. If the thickness shown is more than 0.50 foot, spread and compact the aggregate base in at least 2 approximately equal layers in thickness. The compacted thickness of any one later must not exceed 0.50 foot.
E. At locations inaccessible to spreading equipment, spread and compact aggregate base by any means that will attain the specified requirements; by hand compaction if needed.
F. Apply water to moisture condition the aggregate base as needed for optimum moisture content for compaction.
G. Compact each aggregate base layer to at least 95 percent relative compaction unless otherwise noted elsewhere.
H. Level and contour surfaces to elevations, profiles, and gradients indicated.
I. Maintain optimum moisture content of fill materials to attain specified compaction density.
J. Correct areas of aggregate base that do not comply with the described thickness.
3.4 TOLERANCES
A. Section 014516 - Quality Control: Tolerances.
B. Maximum Variation from Flat Surface: 1/4 inch measured with 10-foot straight edge.
C. Maximum Variation from Thickness: 1/4-inch.
D. Maximum Variation from Elevation: 1/4-inch.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-66 Project No. C2203 SECTION 321313 – CONCRETE IMPROVEMENTS
PART 1 GENERAL
1.1 WORK INCLUDED
A. Work shall consist of removing existing sidewalk, curb, gutter, valley gutter, access ramps and base material and installing new concrete sidewalk, curb and gutter, valley gutter, curb ramps and aggregate base at locations indicated on the plans or as directed by the Engineer. New sidewalk and valley gutter concrete shall comply with City of San Carlos Standard Detail No. 6. New concrete valley gutter shall comply with City of San Carlos Standard Detail No. 8. All new curb ramps shall have detectable warning surfaces installed as part of the ramp in accordance with the plans and Caltrans Standard Details.
B. Work shall consist of removing and modifying inlet manholes at locations indicated on the plans or as directed by the Engineer. New concrete inlet structure concrete shall comply with the City of San Carlos Standard Details and in accordance with the Caltrans Standard Specifications.
1.2 SUBMITTALS
A. The Contractor shall furnish a concrete mix design to the Engineer at least ten (10) working days prior to the start of the work.
PART 2 MATERIALS
2.1 CONCRETE
A. Concrete drainage structures shall comply with 51-7, “Minor Structures”, of the State Standard Specifications. Concrete shall meet the following requirements:
Compressive Strength: 3000 psi @ 28 days
Maximum Slump: 4 inches
Lamp Black: 1 lb. / cy
B. Concrete used in curbs and sidewalks shall comply with Section 73 of the State Standard Specifications
C. Additional cement is permitted to obtain high early strength in concrete except that total cement shall not exceed 700 pounds of cement per cubic yard unless otherwise approved by the City Engineer.
2.2 REINFORCEMENT
A. Reinforcement for concrete structures shall conform to Sections 52-1.01 through 52-1.04 inclusive of the Caltrans Standard Specifications except that Butt Welded Splices shall not be permitted.
2.3 DETECTABLE WARNING SURFACE
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-67 Project No. C2203 A. Curb ramp detectable warning surface shall include of raised truncated domes constructed or installed on curb ramps in conformance with the details shown on the plans and these special provisions. Detectable Warning Surface (DWS) shall be red clay (Federal color 22144) in color and a set-in -concrete style of truncated domes. The detectable warning surface shall be prefabricated, cast-in -place. No surface-applied matting systems (i.e. glued and screwed) style of DWS shall be allowed. Contractor shall neatly trim prefabricated dome panels to fit and conform to curb radius.
B. Prefabricated detectable warning surface shall be in conformance with the requirements established by the Department of General Services, Division of State Architect and be installed in conformance with the manufacturer's recommendations.
C. The finished surfaces of the detectable warning surface shall be free from blemishes.
D. Detectable Warning tiles shall incorporate an in‐line pattern of truncated domes measuring nominal 0.2” height, 0.90” base diameter, and 0.45” top diameter, spaced center‐to‐center 2.35” as measured side by side. For wheelchair safety the field area shall consist of a high density, pyramid micro texture of raised points 0.05” high.
E. Compressive Strength of the tiles shall be no less than 25,000 PSI when tested by ASTM D695.
F. Tensile Strength of the tiles shall be no less than 12,500 psi when measured by ASTM D 638
G. Flexural Strength of the tiles shall be no less than 25,000 psi when tested by ASTM D 790.
H. Slip resistance of the Tile when tested by ASTM C 1028-96: The combined wet and dry static coefficients shell be no less than 0.80 on top of domes and field area.
I. The manufacturer shall provide a written 5-year warranty for prefabricated detectable warning surfaces, guaranteeing replacement when there is defect in the dome shape, color fastness, sound-on-cane acoustic quality, resilience, or attachment. The warranty period shall begin upon acceptance of the contract.
J. The material for the detectable warning surface shall be made by Armor-Tile or an approved equal.
2.4 HOT MIX ASPHALT CONFORM
A. The hot mix asphalt conform material adjacent to concrete improvements shall comply with the Section 321216 Paving Systems in these specifications.
PART 3 EXECUTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-68 Project No. C2203
3.1 REMOVAL OF EXISTING CONCRETE
A. Existing sidewalk, curb, gutter and base material shall be removal as necessary to construct the required improvements. Existing concrete shall be sawcut along existing score lines to full depth prior to removal. Existing concrete to be removed varies in thickness, no additional compensation shall be given for varying concrete thickness. Any concrete broken due to the Contractor's failure to comply with these requirements shall be removed and replaced at the Contractor's expense. Asphalt concrete shall be saw cut at least 12 inches from the lip of gutter in a neat straight line to accommodate form boards.
B. The Contractor shall furnish and install a 6”-thick deep-lift asphalt concrete (Patch Pave) adjacent to concrete valley gutter. The cost to install the 6” -thick deep-lift asphalt concrete (Patch Pave) shall be considered in the prices paid for “ Remove & Replace in Place Valley Gutter”, and no additional compensation will be allowed therefor.
3.2 SUBGRADE AND BASE PREPARATION
A. Subgrade shall be compacted to 90% relative compaction prior to placing base material. Base material shall be placed to the depths required by the plans and details and compacted to 95% relative compaction after mixing the material with water to achieve the optimum moisture content.
3.3 FORMS
A. Wooden forming shall be of two -inch nominal thickness staked at two -foot intervals. The maximum gap at the bottom of the forms shall be 1-3/4 inches.
Forms shall not be installed until after base material has been placed and compacted.
3.4 PROTECTION OF EXISTING FACILITIES
A. The contractor shall protect existing facilities from damage, and discoloration from concrete splash. Adjacent concrete facilities shall be covered during concrete placement to prevent concrete splash and excess concrete from staining the adjacent concrete. After initial placement, strikeoff and finishing, the protection shall be removed and the adjacent concrete cleaned.
B. Vertical existing facilities such as light poles, walls, etc. shall be protected with plastic extending a minimum of three feet above the concrete surface. After initial placement, strikeoff and finishing, the protection shall be removed and the vertical surfaces cleaned.
C. Existing curb outlet drain pipes (under sidewalk drains) shall be protected, rerouted, or replaced and incorporated into the new curb & gutter and curb ramps as applicable. The cost to protect, reroute or replace the curb outlet drain pipes shall be included in the price paid for the various contract items of work involved and no additional compensation will be allowed therefor.
3.5 PLACING AND FINISHING CONCRETE
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-69 Project No. C2203
A. No concrete shall be placed until the forms have been approved.
B. Concrete shall be deposited on a moist grade in such a manner as to require as little re- handling as possible. In general, adding water to the surface of the concrete to assist in finishing operations shall not be permitted.
C. Control joints and expansion joints shall be installed at locations noted on the plans, to match existing, as approved on the score line and expansion joint submittal or as directed by the Engineer. If expansion joint material is used, a minimum of two, 1/2 inch by eighteen-inch dowels shall be used with additional dowels placed every twenty-four inches. Control joints in sidewalks may be made using a tooled joint which shall extend a minimum of 1/4 of the depth of the concrete and shall not be less than 1-1/2 inches in depth.
D. Unless otherwise directed by the Engineer, a medium broom finish shall be applied to match existing facilities in texture and appearance. An approved white or clear liquid curing compound shall be applied to the newly paced concrete after finishing operations have been completed.
E. The curing compound shall be the clear or translucent type containing a fugitive dye conforming to the requirements of ASTM Designation: C 309, Type 1 D, Class A. The loss of water when tested in accordance with California Test 534, shall not be more than 0.15 kg/m2 in 24 hours nor more than 0.45 kg/m2 in 72 hours. The curing compound shall be applied at the approximate rate of one gallon per 150 square feet of area. The curing compound shall be applied in a manner that will provide a complete coating of all exposed faces of the concrete surface.
F. Full compensation for applying curing compound to all exposed faces of the concrete surface shall be considered as included in the prices paid for the various contract items of work involved and no additional compensation will be allowed therefor.
G. All new concrete sidewalk and curb & gutter shall be doweled and epoxied into the existing concrete sidewalk and curb & gutter using #4 rebar at 20” O.C. (minimum of 2). A minimum of 6” Class 2 aggregate base shall be placed and compacted in conformance with these Technical Provisions. Full compensation for furnishing and installing dowels , epoxy and Class 2 aggregate required for the concrete construction shall be considered as included in the prices paid for the various contract items of work involved and no additional compensation will be allowed therefor.
H. The Contractor shall round-off all grade breaks on the curb & gutter with an algebraic difference of 3% and greater. The minimum round- off distance shall be 5 feet.
I. Full compensation to procure, deliver, place, spread, and compact imported topsoil material shall be considered as included in the contract prices for the various contract items of work involved, and no additional compensation shall be allowed thereof.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-70 Project No. C2203
3.6 CONCRETE PROTECTION
A. The Contractor shall protect the concrete against traffic and vandalism. If the concrete is damaged or vandalized, the Contractor shall make the necessary repairs at its own expense. The repair procedure for damaged or vandalized concrete shall be approved in advance by the Engineer.
3.7 CONCRETE CURB RAMPS & OTHER CONCRETE WORK
A. The Concrete curb ramps shall be constructed in conformance with Standard Plans A88A and A88B of the State Standard Plans unless otherwise shown in plans due to certain constraints from existing conditions (eg existing steeper longitudinal road slope, existing driveways, existing residential paths, existing walls, other obstructions, etc). Concrete curb ramps will be measured from the back of the curb and gutter to the grade break at the top of the ramp, the landing and the retaining curb (where applicable) as shown on the State Standard Plans. Areas outside of the defined curb ramp area shall be measured and paid as sidewalk. The curb and gutter shall be measured and paid as curb and gutter.
B. All existing utility boxes, valve boxes/covers, and clean outs located in the sidewalk, driveway, and curb ramp shown on plans to be adjusted to grade and/or replaced shall be included in the price paid for the various contract items of work involved and no additional compensation will be allowed therefor.
C. All existing street light bases located in the sidewalk, driveway, and curb ramp shown on plans to be adjusted to grade shall be included in the price paid for the various contract items of work involved and no additional compensation will be allowed therefor.
D. All existing traffic signal pole bases in the sidewalk and curb ramps identified in plans to be tied in to new grade with concrete work or repair shall be included in the price paid for the various contract items of work involved and no additional compensation will be allowed therefor.
E. All existing sign posts and signs located in the sidewalk, driveway, and curb ramp shown on plans to be relocated, removed, or adjusted shall include existing post/foundation/sign removal, new post/foundation/sign installation, and shall be included in the price paid for the various contract items of work and no additional compensation will be allowed therefor.
F. All existing exposed retaining walls involved in the construction of sidewalk, driveway, and curb ramp shown on plans to be painted in-kind shall be included in the price paid for the various contract items of work and no additional compensation will be allowed therefor.
G. All existing wooden header boards and fences involved in the construction of sidewalk, driveway, and curb ramp shown on plans to be removed and replaced shall be included in the price paid for the various contract items of work and no additional compensation will be allowed therefor.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-71 Project No. C2203 H. All existing landscape rock boulders involved in the construction of sidewalk, driveway, and curb ramp shown on plans to be salvaged and reinstalled shall be included in the price paid for the various contract items of work and no additional compensation will be allowed therefor.
I. All landscape restoration including the restoration of any landscaping, irrigation, hardscape, brick work or walls shall be included in the price paid for the various contract items of work involved and no additional compensation will be allowed therefor.
J. Topsoil shall be used as backfill behind the new sidewalk and curb ramps to fill the gap left from the form board and other work. Top soil shall be procured and imported from a local supplier.
3.8 CONCRETE VALLEY GUTTER
A. Where curb ramp construction takes place adjacent to a valley gutter, the contractor shall replace the valley gutter to the nearest score line. Valley gutter shall be replaced in accordance with City of San Carlos Standard Detail No. 8.
The Contractor shall reconstruct the valley gutter aprons as specified in the City Standard Details unless noted otherwise on the construction drawings. Valley gutters shall be installed or replaced where shown on the plans. Concrete valley gutter shall also be constructed in conformance with details shown on plans.
Concrete curb directly next to concrete valley gutter shall be included in concrete valley gutter measurement.
3.9 DETECTABLE WARNING SURFACE (DWS)
A. All curb ramps shall have a detectable warning surface (DWS) installed in conformance with City Standards and the latest Caltrans Standard Details A88A and A88B. The color of the DWS shall be brick red or clay red.
3.10 HOT MIX ASPHALT CONFORM AT ACCESS RAMP
A. Grinding and placement of HMA for the conform area in front of the concrete access ramps shall comply with the Section 321216 Paving Systems of these specifications.
3.11 CARE AND REPAIR OF CONCRETE
A. Repair shall be per ACI 301 with the following requirements:
a. Patching mortar shall be Sikatop 123 Plus or approved equal. b. Use Sikadur 32 HiMod bonding agent or approved equal. c. Honey and defects deeper than 1.5 inches shall require approval by Engineer prior to commencing repair work.
d. Cracks wider than 0.02 inches for hydraulic structures shall be repaired prior to leak testing.
e. Cracks wider than 0.04 inches shall be repaired.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-72 Project No. C2203 SECTION 321723 – TRAFFIC STRIPING, PAVEMENT MARKERS, PAVEMENT
MARKINGS AND SIGNAGE
PART 1 GENERAL
1.1 SCOPE OF WORK
A. This work consists of removal and replacement of traffic stripes, legends, and raised pavement markers on various roadway sections to their original configuration or as shown on the plans or directed by the engineer in the field.
Any roads, driveways, wall s, and curbs which are damaged during construction, shall be repaired to their original or better condition.
B. Any existing traffic signs that are removed, shall be salvaged to the City Public Works Yard.
C. Traffic signs, stripes, legends, and raised pavement markers shall conform to the latest edition of the California Manual on Uniform Traffic Control Devices, California Department of Transportation, Traffic Manual, Maintenance Manual, and Caltrans Standard Specifications as modified by these Special Provisions.
D. The work includes striping, markings, markers, and signage on the roadway sections as shown on the project plans, located in San Carlos, California.
E. Where traffic conditions are to remain, roadways shall be striped and marked to match existing except as noted in the plans.
1.2 REFERENCES
A. California Department of Transportation (Caltrans):
1. Maintenance Manual.
2. Current Standard Specifications
a. Section 81 – Miscellaneous Traffic Control Devices
b. Section 84 – Markings
c. Section 95 – Epoxy
3. California Manual on Uniform Traffic Control Devices
1.3 SUBMITTALS
A. The Contractor shall submit a schedule for the performance of this work. The schedule shall include approximate dates of work on each roadway section.
B. The Contractor shall submit a detailed traffic control plan for the performance of this work.
C. Certificates of Compliance: Certificates of Compliance shall be provided for all products and materials proposed to be used under this Section.
D. Product Data: Provide manufacturers specification and literature for materials
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-73 Project No. C2203 furnished.
1.4 PROJECT CONDITIONS
A. Do not apply pavement marking paint within 8 hours of fog or rain or when below 40 Degrees F or when pavement is wet.
B. Contractor shall guarantee that all traffic lane pavement markers be in place and adhered to the pavement for a period of not less than 90 days from the date of acceptance of the work by the Owner.
C. All new traffic striping and pavement markings shall be thermoplastic, unless otherwise shown on the plans.
D. No pavement markings shall be applied to any roadway surface until new hot mix asphalt surface has cured for a minimum of seven (7) days when hot melt bituminous adhesive is used, and not less than 14 days when epoxy adhesive is used.
PART 2 PRODUCTS
2.1 GENERAL
A. Unless otherwise specified in the Special Provisions or contract plans, all pavement striping and markings (except temporary) shall be thermoplastic.
2.2 THERMOPLASTIC MATERIAL
A. Thermoplastic material and glass beads shall conform to the requirements of Caltrans Standard Specifications Section 84-2.
B. Thermoplastic material shall be free of lead and chromium, and shall conform to the requirements in State Specification PTH-02ALKYD.
C. Retroreflectivity of the thermoplastic traffic stripes and pavement markings shall conform to the requirements in ASTM Designation: D 6359-99. White thermoplastic traffic stripes and pavement markings shall have a minimum initial retroreflectivity of 250 mcd m-2 lx-1. Yellow thermoplastic traffic stripes and pavement markings shall have a minimum initial retroreflectivity of 150 mcd m-2 lx-1.
D. Thermoplastic material shall be white, unless otherwise shown on the plans.
2.3 GLASS BEADS
A. Glass beads to be applied to surface of the paint and thermoplastic shall conform to the requirements of State Specification 8010-11E-22 (Type II).
2.4 PAVEMENT MARKERS AND ADHESIVES
A. Pavement markers shall conform to Section 81-3, "Pavement Markers," of the
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-74 Project No. C2203 Caltrans Standard Specifications, as specified herein, and in the Special Provisions.
B. Fire Hydrant markers shall be two-way, reflective blue markers.
C. Adhesive for pavement markers shall be Rapid Set Type epoxy conforming to Section 95-2.04 of the Caltrans Standard Specifications or hot melt bituminous adhesive conforming to Section 81 -3 of the Caltrans Standard Specifications.
2.5 TEMPORARY PAVEMENT DELINEATION
A. Temporary Pavement Delineation shall conform to Section 12-6, "Temporary Pavement Delineation," and Section 84-2, "Traffic Stripes and Pavement Markings", of the Caltrans Standard Specifications.
2.6 SIGNAGE
A. Signage shall conform to Section 56 of the Caltrans Standard Specifications and Volume 1, Section 1-A of the City Traffic Design Standards.
PART 3 EXECUTION
3.1 LAYOUT
A. The Contractor shall furnish the necessary control points for all striping, painting and markings and shall be responsible for the completeness and accuracy thereof to the satisfaction of the Engineer.
B. The Contractor shall perform all layout, alignment, and s potting for traffic stripes and markings. Traffic striping shall match the striping prior to the treatment except as shown on the plans or directed by the engineer. When indicated on the plans, striping and marking shall not vary by more than 2 inches in 50 feet from the alignment shown on the plans. Where markings will match existing markings, striping and marking shall not vary by more than 2 inches in 50 feet from the existing markings. The dimensional details of the stripes and markings shall conform to the provisions set forth in the Traffic Manual and Maintenance Manual available for Caltrans.
C. Cat tracks shall consist of spots of paint not more than 3 inches in width and not more than 5 feet apart along the alignment of the stripe. Paint for the cat tracks shall be the same as that for the intended stripe. Paint for the dribble lines shall be neutral color obtained by mixing approximately two parts white paint with one-part black paint.
D. Existing stripes and markings shall be removed prior to painting new ones, but in no case shall any section of street be left without the proper striping for more than 24 hours, or over weekends or holidays.
E. NO STRIPING SHALL BE INSTALLED UNTIL THE LAYOUT AND SPOTTING HAVE BEEN SPECIFICALLY APPROVED BY THE ENGINEER.
Allow 3 working days for approval.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-75 Project No. C2203
3.2 TRAFFIC PAINT AND GLASS BEADS
A. Traffic markings shall be placed in conformance with the provisions in Section 84, "Pavement Markings," of the Standard Specifications, per Volume 1, Section 2-A through 2-D, and 2-G of the City Traffic Design Standards, and these special provisions.
B. All lines stop bars and crossw alks to be painted on street surfaces shall be thermoplastic material Pavement markings of test symbols and arrows shall be formed per Caltrans Standards and shall be thermoplastic material.
C. Thermoplastic traffic stripes (traffic lines) and pavement marki ngs shall be applied in conformance with the provisions in Section 84, " Markings" of the Caltrans Standard Specifications and these special provisions.
D. Thermoplastic material for traffic stripes shall be applied at a minimum rate of
0.20-lb/ft. The minimum application rate is based on a solid stripe of 4 inches in width.
E. All new surfaces shall have the traffic paint applied in two applications in accordance with Section 84-3 of the Caltrans Standard Specifications. The first or priming coat shall be in li ght applications without glass beads to seal the pavement. The first coat shall be dry before application of the second coat.
F. All striping and marking shall be laid out by the Contractor and field reviewed by the City prior to final placement of the Therm oplastic material. Failure to obtain this field review shall be basis for rejection of the work by the City. Any work rejected shall be completely removed, the surface of the pavement restored to the satisfaction of the City, and new striping and marking placed at the Contractor’s expense.
G. Restriping except where indicated on the drawings, shall coincide with the original painting and shall be applied in one application in accordance with Section 84-3 of the Caltrans Standard Specifications.
H. Striping for 24" bars, 12" stop bars, and crosswalk lines shall coincide with the original painting except where indicated otherwise on the plans and shall be installed using Thermoplastic material. Stop bars shall be installed behind the pedestrian path of travel.
I. The pavement markings of the legend (text) and symbols (arrows) shall be furnished and installed, and shall coincide with the original painting except where indicated otherwise on the plans and shall be installed using Thermoplastic material.
J. Where striping joins existing striping, as shown on the plans, the Contractor shall begin and end the transition from the existing striping pattern or from the new striping pattern a sufficient distance to ensure continuity of the striping pattern.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-76 Project No. C2203 K. All surfaces shall be clean and dry prior to installation. Ample time shall be allowed between placement of the asphalt pavement and the initial application. There shall be a minimum drying time between applications of approximately 20 minutes.
L. Glass beads shall be placed on all traffic stripes (except black stripes) and pavement markings except for the first or priming coat on new asphalt surfaces. All glass beads shall be applied directly to the wet traffic paint with a method that provides uniform distribution.
M. Striping shall not be applied at temperatures below 50° F or if pavement surfaces are wet.
N. Thermoplastic traffic stripes and pavement markings shall be free of runs, bubbles, craters, drag marks, stretch marks, and debris.
O. All painted pavement markings shall be clean and sharp as to dimensions.
Ragged ends of segment or fogginess along the sides shall not be permitted.
P. The alignment of all striping shall be accurately laid out. Lines which have a wavy appearance shall be removed and replaced by the Contractor at its expense.
3.3 THERMOPLASTIC MATERIAL AND GLASS BEADS
A. Thermoplastic material and glass beads shall be applied in accordance with Caltrans Standard Specifications Section 84- 2.04. Minimum application thickness shall be 0.1- inch for traffic stripes and 0.15-inch for pavement markings.
3.4 REMOVAL OF STRIPING, MARKERS AND MARKINGS
A. All stripes and pavement markings not in conformance with the proposed striping plan shall be removed by grinding or sandblasting. Black paint will not be allowed unless specifically indicated on the drawings. All thermoplastic material and raised pavement markers shall be removed prior to slurry seal operations.
3.5 PAINTED CURBS
A. All the painted curbs (by color) shall comply with Section 84-3 "Painted Traffic Stripes and Pavement Markings" of the State Standard Specifications. The painted curbs (by color) shall have "“SC ★PD” stenciled in white where shown on the plans.
B. Payment for replacement of painted address number at curb removed due to improvements shall be included in the price paid for other items and no separate payment shall be made therefor.
3.6 PAVEMENT MARKERS
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-77 Project No. C2203 A. Pavement markers shall be placed in conformance with the provisions in Section 85, "Pavement Markers," of the Standard Specifications, per Volume 1, Section 2-E of the City Traffic Design Standards, and these special provisions.
B. All surfaces shall be clean and dry prior to application of the markers.
C. Installation of pavement markers shall conform to the requirements of Section 85-1.06 of the Caltrans Standard Specifications.
D. Blue reflective pavement markers shall be furnished and installed at the street centerline to mark the location of each existing fire hydrant.
E. Yellow raised reflective pavement markers shall be installed on the top of curb at island noses; minimum of four per nose maximum spacing four foot on center per City STD. 721.
F. The adhesive material used in the installation of pavement markers will cause severe dermatitis if it is allowed to come in contact with the skin or eyes. Use gloves and protective creams on the hands. Should this material contact skin, wash thoroughly with soap and water. Do not attempt to remove this material from the skin with solvents. If any adhesive material gets into the eyes, flush for 10 minutes with water and secure immediate medical attention.
3.7 TEMPORARY MARKING
A. Temporary Pavement markings shall be placed in conformance with the provisions in Section 84, "Pavement Markings," of the Standard Specifications, per the City Design Guidelines, and these special provisions.
B. Temporary pavement delineation shall be furnished, placed, maintained, and removed in conformance with the provisions in Section 12-3.01, "General," of the State Standard Specifications and these special provisions. Nothing in these special provisions shall be construed as reducing the minimum standards specified in the California MUTCD or as relieving the Contractor from the responsibilities specified in Section 7-1.09, "Public Safety," of the State Standard Specifications.
C. Whenever the work causes obliteration of pavement delineation, temporary or permanent pavement delineation shall be in place prior to opening the traveled way to public traffic. Lane line or centerline pavement delineation shall be provided at all times for traveled ways open to public traffic.
D. All work necessary, including any required lines or marks, to establish the alignment of temporary pavement delineation shall be performed by the Contractor. Surfaces to receive temporary pavement delineation shall be dry and free of dirt and loose material. Temporary pavement delineation shall not be applied over existing pavement d elineation or other temporary pavement delineation. Temporary pavement delineation shall be maintained until superseded or replaced with a new pattern of temporary pavement delineation or permanent pavement delineation.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-78 Project No. C2203 E. Temporary pavement markers and removable traffic type tape which conflicts with a new traffic pattern or which is applied to the final layer of surfacing or existing pavement to remain in place shall be removed when no longer required for the direction of public traffic, as determined by the Engineer.
F. Whenever lane lines and centerlines are obliterated, the minimum lane line and centerline delineation to be provided shall be temporary reflective raised pavement markers placed at longitudinal intervals of not more than 15 feet.
The temporary reflective raised pavement markers shall be the same color as the lane line or centerline the markers replace.
G. Temporary reflective raised pavement markers shall be placed in accordance with the manufacturer's instructions and shall be cemented to the surfacing with the adhesive recommended by the manufacturer, except epoxy adhesive shall not be used to place pavement markers in areas where removal of the markers will be required.
H. Temporary lane line or centerline delineation consisting entirely of temporary reflective raised pavement markers placed on longitudinal intervals of not more than 24 feet shall be used on lanes opened to public traffic for a maximum of 14 days. Prior to the end of the 14 days the permanent pavement delineation shall be plac ed. If the permanent pavement delineation is not placed within the 14 days, the Contractor shall provide, at his /her expense, additional temporary pavement delineation. The additional temporary pavement delineation to be provided shall be equivalent to the pattern specified for the permanent pavement delineation for the area, as determined by the Engineer.
3.8 SIGNAGE
A. Signage installation shall conform to Section 56 of the Caltrans Standard Specifications. In addition, Contractor shall reference City signage standards for post, foundation, and sign.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-79 Project No. C2203 SECTION 323200 – SOIL NAILS
PART 1 GENERAL
1.1 SUMMARY
A. Description - The work under this section includes the material, equipment, and labor necessary to install and test soil nails, in the locations and to the depths shown on the plans.
1.2 DEFINITIONS
A. Soil Nail - Anchors comprised of a deformed steel bar grouted into a near horizontal drilled hole, together with appropriate corrosion protection and anchorage hardware for the purpose of reinforcing a slope by transferring tensile loads into the soil and/or rock formation.
B. Design Load (DL) - The final maximum effective capacity of the soil nail after allowance for time dependent losses or gains.
C. Proof Load (PL) - The temporary pre-stressing load at which the soil nail is tested.
D. Kips ("k") - A unit of load equal to 1,000 pounds.
1.3 QUALITY ASSURANCE
A. Notification - No site work shall be performed without notification of the Engineer at least 2 full working days prior to commencement of work.
B. Site Information - The Contractor shall satisfy himself/herself as to the nature and quantity of materials likely to be encountered at the site and other work to be performed, and any differences between site conditions shown on the drawings and the actual conditions immediately prior to commencement of work.
C. Inspection and Testing - The Contractor shall provide the Engineer with access to the work and all reasonable facilities for inspecting and checking the work.
D. Conformance of Materials - All materials used in the construction of the soil nail wall shall conform to the most recent version and relevant standards of the American Society for Testing and Materials (ASTM), American Concrete Institute (ACI), International Association of Foundation Drilling (ADSC), Caltrans Standard Specifications (Caltrans), or other standards specified by the Engineer.
E. Contractor shall submit certificates from the materials suppliers stating that materials comply with the requirements of these specifications.
F. Submittals: Provide shop drawings, details, test nail procedures.
PART 2 PRODUCTS
2.1 Soil Nails – Shall be steel thread bars as designated on the plans and manufactured
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-80 Project No. C2203 expressly for use as soil nails or tiebacks by:
Dywidag -Systems International, Long Beach, California; Con-Tech Systems, Delta, B. C., Canada;
Other supplier approved in advance by the Engineer.
2.2 Thread Bar - Shall conform to ASTM Designation A-615 and the following:
Bar Size #6 #7 #8 #9 #10 #11
Yield Load
Grade 75 ksi
33.0k 45.0k 59.3k 75.0k 95.3k 117.0k
2.3 Hardware – Stressing anchors, couplers, anchor plates, wedge washers, anchor nuts, hex nuts, and all other hardware shall conform to the manufacturer’s recommendations and applicable ASTM standards.
2.4 Corrosion Protection - Corrosion protection shall be single or double corrosion protection as recommended by the manufacturer and as shown on the plans.
Unless otherwise required, single corrosion protection shall consist of coating the thread bar with an epoxy coating in conformance with ASTM A-934. The epoxy coating shall have a minimum thickness of 7 mils.
Unless otherwise required, double corrosion protection shall consist of grouting the entire length of the soil nail within a corrugated Polyvinyl Chloride (PVC) sheath.
2.5 Corrosion Inhibitor - Shall be an organic compound with corrosion inhibition, moisture displacing and self-healing properties as recommended by the manufacturer. It shall be physically stable and non-reactive with concrete, steel and sheathing material.
2.6 Accessories - Plastic sheathing, centralizers, spacers, and other accessories of steel or plastic which are necessary for the installation shall be as recommended by the manufacturer. Wood, paper or other organic material shall not be used.
2.7 Cement Grout - Shall be made of non-shrinking portland cement conforming to ASTM C- 150. Chemical additives that can control bleed and accelerate or retard set, may be used.
Water/cement ratio shall be in the range of 0.4 to 0.5. The grout workability must be suitable for uniform placement. Minimum compressive 30 day strength (f’c) shall be 4000 psi, unless otherwise shown on the plans.
PART 3 EXECUTION
3.1 General - The Contractor shall visit the site prior to any construction activities, observe and document the preconstruction condition of all structures, infrastructure, sidewalks, roadways, and all other facilities adjacent to the site. Documentation shall be submitted to the Engineer and Contracting Authority prior to the start of excavation. The Contractor shall make daily visual observation for signs of ground or building movements in the vicinity of each working front. The Contractor shall notify Engineer within 24 hours both verbally and in writing, if signs of movement such as new cracks in structures, increased size of old cracks or separation of joints in structures, foundations, streets or paved and
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-81 Project No. C2203 unpaved surfaces are observed.
3.2 Equipment - The drilling equipment may be percussion, rotary or other type capable of drilling a hole free of protrusions through soil and rock to the dimensions shown on the drawings.
Grout mixing equipment shall be capable of continuous mechanical mixing that will produce a uniform and thoroughly mixed grout. Grout pumping equipment shall be capable of grouting at a pressure of at least 150 psi.
3.3 Alignment - All excavations and holes shall be carefully located and aligned by the Contractor. The drilled hole location shall not deviate more than 2 inches in any direction from the center location shown on the plans. The vertical angle shall be within 3 degrees of the vertical and horizontal orientation shown on the plans.
3.4 Dimensions - The diameter of the auger bit, or the inside diameter of the casing, shall be at least 4 inches and equal to or larger than the diameter shown on the plans. The soil nail lengths shown on the plans are for bidding purposes. Adjustments in location, direction and length may be required by the Engineer.
3.5 Excavation - The excavation (drilling) shall be performed under the intermittent observation of the Engineer to confirm that subsurface conditions are as expected. The Contractor shall keep records of the excavation depth, drilling rates and the transition depth from soil to rock for each drilled excavation.
If excessive sloughing or collapse of the drilled excavation is occurring, then the holes shall be cased to prevent caving. The casing shall be withdrawn as grout is placed.
3.6 Steel Placement - Install the steel thread bars and centralizers promptly after drilling.
Centralizers shall be placed every 5 feet along the soil nail to maintain the steel in the middle of the hole.
3.7 Grout Placement - Immediately after the installation of the steel, grout shall be pumped through a grout pipe or tube extending to the bottom of the drilled excavation. The grouting operation shall be a continuous with the grout pipe kept well below the top of the grout at all times. An accurate record of the amount of grout placed in each excavation shall be maintained by the Contractor.
3.8 Verification and Proof Testing - Soil nails shall be load tested to verify that they will resist the design load. Perform a minimum of two verification tests in each different soil or rock and for each different drilling or grouting method to be used. Verification tests nails will be sacrificial. Perform proof testing on a minimum of 5% of the production nails in each row or a minimum of 1 per row, as shown on the plans or as designated by the Engineer.
The Contractor shall provide the test set up, hydraulic jack and pump, gages, other equipment, and labor to perform and record the proof testing under the technical direction of the Engineer. Testing will be carried out no sooner than 7 days after grouting unless the grout mix included an accelerator.
Load tests shall be made by incrementally loading the soil nail. The loads shall be applied with a hydraulic jack equipped with a pressure gage that has been calibrated within the
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-82 Project No. C2203 prior 6 months as evidenced by a written certificate. The hydraulic pump shall be capable of applying each load increment within 60 seconds and maintaining the load increment within 5 percent of the intended load during the test period.
The soil nail displacement shall be measured with a dial gauge or other target capable of accurately measuring to 0.001 inches.
The verification load test sequence shall be as follows. Except for the reading of the residual movement at AL, no movement readings need to be taken during unloading of the anchor.
Verification Load Testing Schedule (Ratio of Design Load – DL)
AL (.05 DL), 0.25 DL, 0.50 DL, 0.75 DL, 1.00 DL, 1.25 DL, 1.50 DL (CTL), 1.75 DL, 2.00 DL
The alignment load (AL) should be applied and held until no displacement occurs. Dial gauges should be set to “zero” after application of the alignment load. The load at each increment thereafter shall be held for a minimum of 10 minutes or until displacement ceases. The final displacement shall be recorded at each load interval. The creep test load (CTL = 1.50 DL) shall be held for a minimum of 60 minutes, displacement measurements shall be taken at 1, 2, 3, 4, 5, 6, 10, 20, 30, 45 and 60 minutes. The total movement within the period of 6 to 60 minutes shall not exceed 0.080 inches (2mm).
Proof Load Testing Schedule (Ratio of Design Load – DL)
AL (.05 DL), 0.25 DL, 0.50 DL, 0.75 DL, 1.00 DL, 1.25 DL, 1.33 DL (CTL)
The alignment load (AL) should be applied and held until no displacement occurs. Dial gauges should be set to “zero” after application of the alignment load. The load at each increment thereafter shall be held for a minimum of 1 minute or until displacement ceases. The final displacement shall be recorded at each load interval. The creep test load (CTL = 1.50 DL) shall be held for 10 minutes, displacement measurements shall be taken at 1, 2, 3, 4, 5, 6, and 10 minutes. If the total movement between 1 minute and 10 minutes exceeds 0.04 in. (1mm), the test load shall be held for an additional 50 minutes with further displacement measurements made at 15, 20, 25, 30, 45, and 60 minutes. The total movement within the period of 6 to 60 minutes shall not exceed 0.080 in. (2mm).
3.9 Test Nail Acceptance or Rejection – A test nail shall be considered acceptable when it does not pull-out and meets the testing and allowable displacement criteria described above. If a test nail does not meet the accepted criteria, the Contractor shall determine the cause of failure.
For a test nail that does not meet acceptance criteria, the Engineer shall review the results of each verification test. Installation methods which do not satisfy the testing requirements shall be rejected. The Contractor shall propose alternative methods and install replacement verification nails at no additional costs.
The Engineer may require replacement of some or all of the production nails between a failed proof test and adjacent passing proof test nail. Engineering may require installation and testing of additional proof nails to verify adjacent production nails have sufficient load
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-83 Project No. C2203 carrying capacity. Production nails may be assigned a reduce capacity and addition production nails may be require to achieve the specified design loads. Installation and testing of additional proof test nails or addition production nails due to proof test nail failures shall be at no additional cost to Owner.
3.10 Protective Coating for Steel – All exposed steel that is not encased in concrete shall be protected with two coats of Black Coal Tar Epoxy; (a) Koppers Bitumastic No. 300-M, (b) Americoat 78 HB, or (c) equivalent product approved by the Engineer, applied in conformance with the manufacturer's recommendations. Any portions of the protective coating that are scratched, nicked or otherwise disturbed during construction shall be touched-up with additional coats of the epoxy coating.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-84 Project No. C2203 SECTION 323201 – SHOTCRETE AND WALL DRAINAGE
PART 1 GENERAL
1.1 SUMMARY
A. Description - Shotcrete placement and wall drainage work shall consist of furnishing all materials and labor required for placing and securing geocomposite drainage material, connection pipes, footing drains, weep holes, drainage gutter, reinforcing steel, nail head bearing plates, nuts and shotcrete for the soil nail walls shown on the plans.
B. Site Information - The Contractor shall satisfy himself/herself as to the nature and quantity of materials to be moved and other work to be performed, and any differences between site conditions shown on the drawings and actual conditions immediately prior to commencement of work.
1.2 DEFINITION
A. Shotcrete: Mortar or concrete pneumatically projected at high velocity onto a surface; also known as air -blown mortar; also pneumatically applied mortar or concrete, sprayed mortar and gunned concrete. Shotcrete shall comply with requirements of ACI 506.2, “Specifications for Materials, Proportioning and Application of Shotcrete.”
1.3 SUBMITTALS
A. Certified shotcrete mix design including, but not limited to:
1. Brand and type of portland cement.
2. Source, gradation, and quality of all aggregates used.
3. Proportions of mix by weight and water-cement ratio.
4. Proposed admixtures, manufacturer, dosage, technical literature (where allowed).
5. Compressive strength test results for the proposed shotcrete mix design, manufacturer records completed within 6 months of the start of shotcreting may be submitted for initial verification of the required compressive strengths at the start of production work.
B. Shop Drawings: Reinforcing Steel.
C. Two 300 mm x 300 mm x 25 mm (12 inch by 12 inch by 1 inch) sample panels showing required finish. Submit panels within 30 days after receipt of notice to proceed.
D. Written documentation of project references, including project name, owner’s name, and phone numbers from at least 3 comparable projects in the last 2 years.
E. Written documentation of the nozzleman's qualifications including proof of ACI certification (if applicable).
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-85 Project No. C2203 F. Written documentation showing that drilling operators and foreman have a minimum of 2 years of experience installing soil nails or permanent ground anchors with the Contractor’s organization.
G. Written documentation of the shotcrete supervisors experience, including direct shotcrete application experience on comparable projects.
H. Inadequate proof of personnel qualifications shall be cause for withholding construction approval. Changes to previously approved personnel must be approved by the Contracting Authority in writing.
I. Written documentation of the certification of the testing laboratory. Include documentation that the strength testing laboratory complies with ASTM C 1077 and has the experience to perform the tests specified in this Section. The testing laboratory shall be AASHTO accredited for ASTM C 1077 or demonstrate the ability to perform the requisite tests.
J. Proposed methods of shotcrete placement and of controlling shotcrete thickness and maintaining facing alignment and location.
K. Description of the proposed equipment for mixing and applying shotcrete. Include the manufacturer instructions, recommendations, literature, performance, and test data.
L. Manufactures’ data and specifications for geo-composite strip drainage panels, connectors, outlet pipe and all material used for the wall drainage system as shown on the plans or as specified by Engineer.
1.4 QUALITY CONTROL
A. Contractor Qualifications.
1. The work defined in this section is specialty construction requiring a specialty contractor who is highly knowledgeable and experienced in the fabrication and installation of shotcrete. The Contractor performing the work in this Section shall submit proof of three (3) projects within the last five (5) years on which the Contractor has successfully installed shotcrete of similar applications as required for this project. A brief description of each project with the owner’s name and phone number shall be included.
2. Workers, including foreman, nozzleman, and delivery equipment operators, shall be fully qualified to perform the work. All nozzlemen on this project shall have at least one year of experience in the past three years in similar shotcrete application work and shall demonstrate ability to satisfactorily place the material.
3. Initial qualification of the nozzlemen shall be based either on ACI certification or satisfactory completion of preconstruction test panels. The requirement for nozzlemen to shoot preconstruction test panels will be waived for nozzlemen who can submit documented proof that they have been certified in accordance with the ACI 506.3R, and that their certification is current. The Certification shall have been
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-86 Project No. C2203 done by an ACI recognized shotcrete testing laboratory, or recognized shotcreting consultant, and shall have covered the type of shotcrete used for the project.
Nozzlemen who are not required to shoot preconstruction test panels on the basis of ACI Certification shall still be required to shoot production test panels periodically during the course of the Work at the frequency specified herein.
4. The Contractor shall notify the Engineer not less th an 5 days prior to the shooting of preproduction test panels by non-certified nozzlemen. Preproduction test panels shall be prepared using the same shotcrete mix and equipment as those to be used in the production work.
5. The Contractor shall notify the Engineer of any problem that may influence the quality of the shotcrete.
B. Tolerances:
1. Cover of reinforcement: ACI 506.2, Paragraph 3.6.2 unless otherwise shown on the plans.
2. Alignment and thickness of shotcrete shall be controlled by installing ground wires. Alignment and thickness control shall conform to ACI 506R Section 5.6.
1.5 PRECONSTRUCTION TESTING
A. Conform to the requirements of ACI 506R, Paragraph 6.4.
B. Each nozzleman without previous ACI certification shall make 2 test panel s for each mix design, 600 mm (24 inches) square and 90 mm (3 1/2 inches) minimum thickness. Take 5 cores or cubes from each 75 mm (3 inch) panel for compressive strength testing in accordance with ACI 506.2.
C. Qualification of the nozzlemen shall also be based on a visual inspection of the shotcrete density and void structure and on achieving the specified 3-day and 28- day compressive strength requirements determined for test specimens extracted from the preconstruction test panels. Preconstruction and production test panels, core extraction and compressive strength shall be conducted in accordance with ACI 506.2 and AASHTO T24/ASTM C42, unless otherwise specified herein.
D. Nozzlemen who are qualified on the basis of preproduction testing may begin production shooting on the basis of acceptable preconstruction test panels and on test specimens passing the 3-day strength requirements. Continued qualification will be subject to test specimens passing the 28-day strength tests and maintaining satisfactory shooting performance during production test panels.
E. Using the proposed mix design make at least two job-site sample panels approximately 2400 mm (8 feet) high and 1800 mm (6 feet) wide with thicknesses shown. The job-site panels shall contain reinforcing typical of the work to be installed and other details to simulate actual job conditions. Finish sample panels as required for work to be i nstalled. Sample panels must be approved by the Resident Engineer before any work can begin.
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-87 Project No. C2203
1.6 CONSTRUCTION TESTING
A. Make one test panel 450 mm (18 inches) square and 75 mm (3 inches) thick for each day's work or portion thereof. Provide test panels to a testing laboratory approved by Resident Engineer and reimbursed by the contractor. Five compressive strength specimens will be obtained from each panel and tested for compressive strength in accordance with ASTM C42. Two (2) samples are to be tested at 7 days and 28 days after application. The fifth sample should be retained for 56 days should additional testing be required. Strength test results are to be reported to the Resident Engineer 24 hours after completion of test.
PART 2 PRODUCTS
2.1 MATERIALS
A. Portland Cement: ASTM C150, Type I , II, III or V.
B. Reinforcement Steel:
1. Reinforcement bars: ASTM A615, Grade 60; deformed.
2. Low-Alloy-Steel Reinforcing Bars: ASTM A706.
3. Galvanized Reinforcing Bars: ASTM A767, Class II zinc coated, hot-dip galvanized after fabrication and bending, as follows:
4. Bearing Plates: ASTM A529, Grade 50
5. Epoxy-Coated Reinforcing Bars: ASTM A775 and ASTM A934
6. Plain Steel Wire: ASTM A82.
7. Deformed-Steel Wire: ASTM A496.
8. Epoxy-Coated-Steel Wire: ASTM A884.
C. Aggregate: ASTM C33, and UACE EM 1110-2 (Gradation Table 3-1), as defined in Table 2.
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-88 Project No. C2203
D. Chemical Admixtures: ASTM C494.
E. Air-entraining Admixture: ASTM C260.
F. Water: Fresh, Clean, and Potable
G. Accelerating additives shall be compatible with the cement used, be non- corrosive to steel and shall not promote other detrimental effects such as cracking and excessive shrinkage, and shall not contain calcium chloride. They are to be used in accordance with manufacturer’s recommendations.
2.2 MIXES
A. Shotcrete: The shotcrete used shall consist of a mixture of Portland cement, sand, aggregate, and water so proportioned and mixed to be pumped. Shotcrete shall have a minimum compressive strength of 2000 pounds per square inch at 3-days and 4000 psi at 28-days or as shown on the plans, whichever is greater. No shotcrete work shall be performed prior to verification by the Engineer of the required compressive strength.
B. Mix Design: Testing Laboratory, retained by Contractor, shall design a mix to produce concrete as specified and perform tests as required. Certified test reports (duplicate) shall be submitted. Reports shall include proportions of design mix.
C. Maintain water-cement ratio between 0.35 to 0.50 by weight.
D. Concrete-mix design adjustments may be considered if characteristics of materials, Project conditions, weather, test results, or other circumstances warrant. Resubmit and obtain approval from the Resident Engineer of proposed changes to concrete-mix design.
E. Improper Mix: Immediately notify the Concrete Testing Laboratory and the Resident Engineer if at any time during construction the accepted mix design proves to be unsatisfactory for any reason. The Contractor's Concrete Mix Designer shall modify the design, subject to the review of the Resident Engineer, until a satisfactory mix is obtained.
PART 3 – EXECUTION
3.1 WALL DRAINAGE NETWORK
A. Install and secure all elements of the wall drainage network as shown on the plans or as required by the Engineer to suit field conditions. The drainage network shall consist of installing geocomposite drain strips, connectors and weep holes. All elements of the drainage network shall be installed prior to shotcreting.
B. Install composite drain strips centered between the column of nails as shown on the plans. The drain strips shall be at least 12 inch wide and placed with the geotextile side against the ground. The wall excavation should be notched into the
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-89 Project No. C2203 ground at the panel locations so that the drainage panels do not protrude into the wall as dimensioned on the plans. Secure the strips to the excavation face and prevent shotcrete from contaminating the ground side of the geotextile. Drain strips shall be continuous. Splices, if approved by the Engineer, shall be made with a minimum 12 inch overlap such that the flow of water is not impeded. Repair any damage to the geocomposite drain strips prior to shotcrete placement.
C. Install connector panels and lower footing drainage panels as shown on the plans.
Weep holes should be provided through the shotcrete facing to drain water from behind the wall. Use schedule 40 pvc pipe to form the weep hole through the wall.
Prevent shotcrete intrusion into the discharge end of the pipe.
D. During placement of shotcrete, the drainage systems shall be protected against contamination to ensure proper functioning.
3.2 SHOTCRETE PROPORTIONING, DELIVERING AND MIXING
A. Proportioning: Mix shall be designed by Contractor-retained testing laboratory; see "PRECONSTRUCTION TESTING" hereinbefore.
B. Mixing Processes:
1. Mixing, General: Strength of mix is specified on the drawings. At Contractor's option, use either the dry or wet mix process. Discharge entire batch before recharging. Clean mixer at least once every 8-hour shift or portion thereof. Reject material mixed and standing for 45 minutes; remixing or tempering not permitted.
2. Wet Mix Process: Conform to ACI 506R, Paragraph 1.5.2.
3.3 EQUIPMENT, WET MIX PROCESS
A. Batching and Mixing Equipment: ACI 506R, Paragraph 3.5. Batch by weighing; use rotating mixing equipment and mix in accordance with ACI 304R, and ASTM C94 for ready-mixed concrete.
B. Delivery Equipment: Use pneumatic feed or positive displacement type of design and size capable of delivering premixed materials accurately, uniformly and continuously through the hose, all in accordance with ACI 506R, Paragraphs 3.3 and 3.7.
C. Air Supply: ACI 506R, Paragraph 3.4.2.
D. Water Supply: Conform to ACI 506R, Paragraph 3.8.1 with adequate capacity to maintain water pressure approximately 65 N (15 pounds) higher than highest air pressure required, both air and water pressure uniformly steady, non-pulsating.
3.4 ALIGNMENT CONTROL
A. General: To establish thickness and surface planes or shotcrete build-up provide ground wires, taut, secure, true to line and plane, conforming to ACI 506R, Paragraph 5.6.
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-90 Project No. C2203 B. The Contractor shall ensure that the thickness of shotcrete satisfies the minimum requirements shown on the Contract Drawings. Shotcrete shall completely encase all reinforcement and other obstructions shown on the plans. Shotcrete shall be applied by the wet-mix process only.
C. The Contractor shall ensure that the front face of the shotcrete remains less than 25 mm (1 inch) outside of its required limits shown on the Contract Drawings.
D. The Contractor shall ensure that the excavated face be flat and free from irregularity prior to shotcrete placement. Additional shotcrete used to fill gaps, voids and irregularities on the excavation face is the responsibility of the Contractor.
E. The cost of additional material used to fill void space between the actual shotcrete face and the proposed limits of the shotcrete face is the responsibility of the Contractor.
F. Reinforcing Positioning: Check that reinforcing is positioned and sized in accordance with the Contract Documents and ACI 506R, Paragraph 5.4.
3.5 SHOOTING
A. General: ACI 506R, Paragraph 8.5.7. Shoot and fill corners first, with continuous uniform material flow from nozzle held approximately 600 to 1500 mm (2 to 5 feet) from the work, at angle normal to the surface.
1. Shoot around reinforcing with nozzle close to encase reinforcement as illustrated in ACI 506R, Figure 8.4, left column.
2. If flow is not uniform and slugs, sand spots or wet sloughs result, turn nozzle away until faulty work is cut out and repaired.
3. Do no shotcrete work if temperature is below 4 degrees Celsius (40 degrees Fahrenheit) without providing continuous heat and adequate protection from freezing.
4. Shotcrete shall be placed in two, successive lifts. Furthermore, each lift shall be 4 inches thick except that for the second lift, the thickness shall be increased to 8 inches where necessary to cover the protruding soil nails. Each lift shall fully encase the applicable welded wire fabric reinforcing layer and reinforcing bars as shown on the plans. The second layer shall also receive an architectural surface treatment and stain.
B. Preparation of Surfaces to Receive Shotcrete: ACI 506R, Paragraph 5.2, as applicable to the work, as approved.
C. Rebound: ACI 506R, Paragraph 8.5.11. Do not work rebound into construction nor salvage rebound for subsequent batching.
D. Suspend application if:
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-91 Project No. C2203
1. High wind prevents nozzlemen from proper application of material.
2. Weather approaches freezing and shotcrete cannot be protected.
3. Rain, other than a very light sprinkle, occurs which would wash cement out of freshly placed material.
4. Ground water or surface water flow is persistent enough to wash cement out of freshly placed material.
E. Time Between Coats:
1. In sloping, vertical or overhanging work, allow interval of time sufficient for initial, but not final, set to develop.
2. At development of initial set, lightly broom surface to remove any laitance to provide better bond with succeeding applications.
F. Construction Joints:
1. ACI 506R, Paragraph 5.7.2, tapering over a width of 300 mm (1 foot) to a 25 mm (1 inch) edge from board laid flat.
2. Before proceeding with additional shotcrete work, thoroughly clean joint and adjacent shotcrete, then wet and scour surfaces with air jet.
G. Warm Weather Application: Prevent dryout resulting in cracking and separation by keeping surfaces continuously moist and/or covered with continuously moistened burlap for 7 days after shotcreting.
H. Surface Finish: Bring final surfaces of shotcrete to an even plane, well formed corners either square or to radius shown, working up to ground wires using somewhat lower placing velocity than normal.
1. Remove ground wires to 20 mm (3/4 inch) back from surface and fill holes with shotcrete to adjacent surface elevations.
2. Wood float surfaces to provide a smooth true finish.
I. Safety requirements: Special attention shall be given to eye and dust protection hazards when shotcrete is to be applied. Cement and other admixtures are caustic and may cause skin and respiratory irritation unless safety measures are taken in addition to required ventilation. During the application of shotcrete, provide nozzle operator and helpers with gloves, face shields, and adequate protective clothing.
3.6 CURING – ACI 506.2, Paragraph 3.8.
3.7 HOT WEATHER SHOTCRETING – ACI 506R, Paragraph 8.9.
3.8 COLD WEATHER SHOTCRETING – ACI 506R, Paragraph 8.10.
3.9 PROTECTION AND CLEANUP
A. Protection: Protect adjacent walls, windows, doors, other building surfaces, grounds and/or shrubs and property of others from damage by shotcreting, rebound and dust.
1. Construct a sealed dust partition to confine rebound and dust to immediate work area. Dust partition shall be integral with exhaust system. A negative air pressure
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-92 Project No. C2203 shall be maintained within partitioned area during shotcrete applications to prevent dust leakage beyond area.
2. Immediately clean all shotcrete materials and remove all rebound from site.
B. Clean-up: Continuously remove rebound material to ensur e that base, intermediate, and finish surfaces are clean and ready for bonding layers.
3.10 ARCHITECTURAL SURFACE TREATMENT AND COLORING
A. All shotcrete surfaces shall receive architectural surface treatment that conform to the details shown on the plans, the provisions in Section 53, “Shotcrete,” and Section 51, “Shotcrete Structures,” of the Standard Specifications and these special provisions.
B. If applicable, the exterior surface of the subject soil nail wall shall be “sculpted” and color stained such that the final product is similar to that of natural, fractured local bedrock.
C. For sculpted shotcrete, the final surface shall be prepared for staining by pressure washing to remove all loose material, laitance, efflorescence, sheen and other foreign materials. No sandblasting will be allowed.
D. For stained shotcrete, application of the stain base shall be by air or airless sprayer, highlight coloration shall be by staining or other suitable antiquating method. The stain material shall be applied in accordance wi th the printed instructions of the stain material manufacturer. A copy of such printed material shall be furnished to the Engineer prior to application of the material. The stain material shall produce a spectrum of brown earth tone colors. Color hardeners shall be used to achieve a wider variety of earth tones. Colors shall be such that alteration of the color and further color development after initial application can be accomplished.
3.11 DEFECTIVE WORK
A. General work will be evaluated by the Engineer or designated agent in accordance with ACI 506.4. If the evaluation reveals unbonded work or cores fail to meet specified strengths, or finishes are unsatisfactory, repair such defective work, as approved, without additional cost to the Owner.
END OF SECTION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-93 Project No. C2203 SECTION 332250 – SHORING AND TRENCH SAFETY
PART 1 GENERAL
1.1 SECTION INCLUDES
A. Shoring required for general safety, worker protection, and protection of adjacent property and pipelines from the hazards of caving ground.
B. Shoring for trench excavations.
C. Shoring for structural excavations.
D. Shoring for tunneling pits.
E. Contractor's responsibilities.
F. Contractor's trench safety plan.
G. Contractor's supervisor.
1.2 RELATED SECTIONS
A. Section 020010 – Site Conditions
B. Section 020030 – Existing Utilities and Underground Structures
C. Section 021100 – Site Preparation
D. Section 332315 – Excavation and Backfill
1.3 CONTRACTOR'S RESPONSIBILITIES FOR SAFETY
A. The Contractor shall be solely and completely responsible for conditions of the job site, including safety of all persons (including employees) and property during performance of the work. This requirement shall apply continuously and not be limited to normal working hours.
B. Minimum Requirements for Project Shoring Systems:
1. Comply with all governing regulations pertaining to excavation safety including the most current edition of Cal/OSHA Construction Safety Order, Article 6;
2. Be compatible with the surface and subsurface soil and groundwater conditions mapped and encountered in test borings for the project and resist lateral earth pressures and hydrostatic pressures (where not dewatered);
3. Protect personnel that enter the excavation;
4. Protect existing utilities, pavements, and structures;
5. Excavation and installation of the shoring system must occur in a manner
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-94 Project No. C2203 and sequence that does not damage existing structures, pavements, and utilities including through settlement, heave, or vibrations;
6. Provide stable excavation walls and bottom (e.g., prevent bottom heave);
7. Be designed to operate in conjunction with dewatering and soil stabilization systems also provided by the Contractor.
8. As permitted by the specifications, allow for removal or abandonment of shoring in a manner and sequence that is instep with the backfilling sequence (i.e., shoring shall not be removed ahead of backfilling) and does not damage the finished pipeline or structures or existing structures, pavements, and utilities including through settlement, heave or vibrations (Contractor to address removal/abandonment concerns specific to the type of shoring proposed in the shoring submittal). Any void space created by shoring removal shall be completely filled with a material approved by the City Engineer;
9. Resist lateral live loads from vehicular and/or train traffic, construction equipment and spoils, if any;
C. Safety provisions shall conform to U.S. Department of Labor (OSHA), the California Occupational Safety and Health Act, and all other applicable Federal, State, county, and local laws, ordinances, codes, the requirements set forth below, and any regulations that may be detailed in other parts of these Specifications.
D. Contractor is advised that Part 1926 of 29 CFR, subpart P, has been revised. This regulation governs excavations, trenching and protective systems, sloping, benching, wood, and aluminum shoring for various types of soils, and depths of excavations. The Contractor shall follow these regulations (including the latest revisions) for this project.
F. Where any of these requirements are in conflict, the more stringent requirement shall be followed.
G. The Contractor shall cease work immediately and notify the Engineer if they determine their shoring method is unsafe.
1.4 PERMIT
A. For trenches or excavations of depth five feet or deeper, the Contractor shall obtain from the State Division of Industrial Safety a permit for such excavation; submit a copy of the permit to the Engineer, prior to initiating any work requiring said permit.
1.5 CONTRACTOR SUBMITTALS
A. The Contractor’s attention is directed to the provisions for "Shoring and Bracing Drawings" in Section 6705 of the California Labor Code. The Contractor, prior to beginning any trench or structure excavation 5 feet deep or over, shall submit to the Engineer for review for compliance with Section 6705 the Contractor’s detailed plan showing design of all shoring, bracing, sloping of the sides of excavation, or other provisions for worker protection against the hazard of caving ground during the excavation of such trenches or structure excavation. If such plan varies from the shoring system standards established in the Construction Safety Orders of the
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-95 Project No. C2203 State of California, such alternative system plans shall be prepared, stamped and signed by a civil or structural engineer licensed in the State of California at the Contractor’s expense.
B. A professional Civil or Structural Engineer licensed in the State of California shall design, sign, and stamp the Contractor’s proposed shoring systems for review by the Engineer prior to construction. Submit shoring system submittal in conjunction with dewatering plan and soil stabilization plan.
C. The shoring system submittal shall address open cut trenching, each storm drain catch basin, manholes, and for all excavations located in close proximity to unlined drainage channels or in close proximity to critical structures, utilities, or granular non-cohesive materials. Individual submittals are required for all open-cut trenching and for each major underground structure (sewer tie-in locations) as well as existing critical utilities including those in close proximity to drainage channels or those that penetrate a 1.5H:1V plane projected down from the utility.
D. The use of speed shores or trench box shoring in flowing, running or raveling ground conditions shall not be allowed. The Contractor shall be aware that flowing, running or raveling ground conditions are anticipated throughout the project and shall design their shoring system accordingly.
F. Certificates of Compliance: Certificates of Compliance shall be provided for all products and materials proposed to be used under this Section.
G. For all materials that are not pre -approved by the City the Contractor shall designate the source and/or submit samples of all materials in advance of their use for required testing and Engineer’s approval. All testing costs shall be at the Contractor’s expense.
H. Contractor shall design shoring system to protect nearby utilities that may not daylight into trench excavation but limits of existing backfill in close proximity can become unstable due to the effects of ground disturbance and reduced strength caused by past nearby excavations and backfill. Past trench backfill has consisted of granular non-cohesive materials (including pea- gravel) and have little to no stand- up time. Full face, continuous excavation wall support shall be required in these areas.
1.6 SAFETY ORDERS
A. The Contractor shall have at the work site, copies or suitable extracts of the Construction Safety Orders of Cal-OSHA, and Part 1926 of 29 CFR, subpart P.
B. All work shall comply with the provisions of these and all other applicable laws, ordinances and regulations.
C. The Contractor is prohibited in the use of unrestricted speed shores or trench box shoring in flowing, running, or raveling ground conditions.
1.7 CONTRACTOR'S SUPERVISOR
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-96 Project No. C2203 A. The Contractor shall appoint a qualified and competent supervisory employee who shall be responsible to determine the sloping or shoring system which shall be used depending on local soil type, water table elevation, stratification, depth, and any other pertinent factors including the safety of the workers.
PART 2 PRODUCTS
Not Used.
PART 3 EXECUTION
Not Used.
END OF SECTION
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-97 Project No. C2203 SECTION 332315 – EXCAVATION AND BACKFILL
PART 1 GENERAL
1.1 THE REQUIREMENT
A. The Contractor shall provide all materials, equipment, and labor necessary to perform and complete all utility earthwork as shown on the Drawings and as specified herein.
B. The work of this Section includes all utility earthwork required for construction of the project. Such utility earthwork shall include, but may not necessarily be limited to, the loosening, removing, loading, transporting, depositing, and compacting in its final location of all materials wet and dry, as required for the purposes of completing the work, which shall include, but not necessarily be limited to, the furnishing, placing, and removing of sheeting, shoring and bracing necessary to safely support the sides of all excavations; all pumping, ditching, draining and other required measures for the removal or exclusion of water from the excavation; soil stabilization; the supporting of structures above and below the ground; all backfilling around structures and all backfilling of trenches; the disposal of excess excavated materials; borrow of materials to make up deficiencies for fills; and all other incidental earthwork.
C. Hazardous materials shall be handled in accordance with all regulatory agency requirements.
1.2 RELATED WORK SPECIFIED ELSEWHERE
A. Section 332250 – Shoring and Trench Safety
B. Section 332538 – Precast Concrete Storm Drain Structures
C. Section 333600 – Grout
1.3 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. State Codes:
California Labor Code.
Construction Safety Orders of the State of California.
B. State of California (Caltrans) Standards:
1. Standard Specifications:
Section 25 Aggregate Subbases.
Section 26 Aggregate Bases.
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-98 Project No. C2203 Section 68 Subsurface Drains.
Section 88 Engineering Fabrics
C. Commercial Standards:
ASTM D 422 Test Method for Particle-Size Analysis of Soils.
ASTM D 1556 Test Method for Density of Soil in Place by the Sand- Cone Method.
ASTM D 1557 Test Methods for Moisture-Density Relations of Soils and Soil-Aggregate Mixtures Using 10-lb (4.54-kg) Rammer
and 18-in. (457-mm) Drop.
ASTM D 1633 Test Method for Compressive Strength of Molded Soil- Cement Cylinders.
ASTM D 2419 Method for Sand Equivalent Value of Soils and Fine Aggregate.
ASTM D 2487 Test Method for Classification of Soils for Engineering Purposes.
ASTM D 2922 Test Methods for Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth).
ASTM D 3017 Test Method for Water Content of Soil and Rock in Place by Nuclear Methods (Shallow Depth).
ASTM D 3776 Test Methods for Mass Per Unit Area (Weight) of Woven Fabric.
ASTM D 3786 Method of Hydraulic Bursting Strength of Knitted Goods and Nonwoven Fabrics: Diaphragm Bursting Strength
Tester Method.
ASTM D 4253 Test Methods for Maximum Index Density of Soils Using a Vibratory Table.
ASTM D 4254 Test Methods for Minimum Index Density of Soils and Calculation of Relative Density.
ASTM D 4318 Test Method for Liquid Limit, Plastic Limit, and Plasticity Index of Soils.
ASTM D 4491 Test Methods for Water Permeability of Geotextiles by Permittivity.
ASTM D 4632 Test Method for Grab Breaking Load and Elongation of Geotextiles.
ASTM D 4751 Test Method for Determining the Apparent Opening Size of a Geotextile.
ASTM D 6023 Standard Test Method for Density, Yield, Cement Content, and Air Content of Controlled Low-Strength
Material (CLSM).
OSHA Occupational Safety and Health Administration.
1.4 CONTRACTOR SUBMITTALS
A. The Contractor's attention is directed to the provisions for "Shoring and Bracing Drawings" in Section 6705 of the California Labor Code. The Contractor, prior to beginning any trench or structure excavation five (5) feet deep or over, shall submit to the Engineer for
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-99 Project No. C2203 review for compliance with Section 6705 the Contractor's detailed plan showing design of all shoring, bracing, sloping of the sides of excavation, or other provisions for worker protection against the hazard of caving ground during the excavation of such trenches or structure excavation. If such plan varies from the shoring system standards established in the Construction Safety Orders of the State of California, such alternative system plans shall be prepared, stamped and signed by a civil or structural engineer licensed in the State of California at the Contractor’s expense.
B. For all materials that are not pre-approved by the City the Contractor shall designate the source and/or submit samples of all materials in advance of their use for required testing and Engineer’s approval. All testing costs shall be at the Contractor’s expense.
C. Submit soil stabilization plan stamped and signed by a California registered civil engineer with minimum five (5) years experience with such work.
D. Certificates of Compliance: Certificates of Compliance shall be provided for all products and materials proposed to be used under this Section.
1.5 QUALITY ASSURANCE
A. General: All soils and compaction testing will be done by a testing laboratory at the Contractor’s expense and as specified in Section 2, “Special Provisions”. The Engineer shall approve use of the Contractor-selected laboratory prior to the work.
B. Where soil material is required to be compacted to a percentage of maximum density the maximum density at optimum moisture content will be determined in accordance with ASTM D 1557. Where cohesionless, free draining soil material is required to be densified to a percentage of relative density the calculation of relative density will be determined in accordance with ASTM D 4253 and D 4254. Field density in-place tests will be performed in accordance with ASTM D 2922, or by such other means acceptable to the Engineer.
C. The Contractor shall notify the Engineer at least 48 hours prior to performing any utility excavation.
PART 2 PRODUCTS
2.1 BACKFILL MATERIALS
A. Backfill shall be a selected or processed clean, fine earth, rock, or sand, free from objectionable material, vegetation, or other deleterious substances.
B. The following TYPES of backfill materials are designated and defined as follows:
TYPE 1. Sand shall be material with 100 percent passing a 3/8-inch sieve, at least 90 percent passing a No. 4 sieve, and a sand equivalent value not less than
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-100 Project No. C2203 TYPE 2. Class 2 Aggregate Base shall be crushed rock aggregate base material meeting the requirements of Section 26, “Aggregate Bases,” for 19 millimeter (3/4 inch) maximum grading, of the Caltrans Standard Specifications.
TYPE 3. Class 1, Type A or B, Permeable Material shall be crushed stone, or gravel, durable and free from slaking or decomposition under action or alternate wetting or drying, uniformly graded, and shall meet the requirements of Section 68-2.02F(2) for Class 1, “Permeable Material,” of the Caltrans Standard Specifications.
TYPE 4. Class 2 Permeable Material shall be crushed rock or gravel, durable and free from slaking or decomposition under the action of alternate wetting or drying, uniformly graded, and shall meet the requirements of Section 68-2.02F(3) for Class 2 "Permeable Material," of the Caltrans Standard Specifications.
TYPE 5. Structure Backfill Material shall meet the requirements of Section 19- 3.02B Type D of the Caltrans Standard Specifications.
TYPE 6. Class 3 Permeable Material shall be ¾” crushed rock or gravel, durable and free from slaking or decomposition under the action of alternate wetting or drying, uniformly graded, and shall meet the requirements of Section 68-2.02F(4) for Class 3 "Permeable Material," of the Caltrans Standard Specifications.
TYPE 7. Manufactured Backfill shall be manufactured, angular, granular, crushed stone, rock, or slag with 100 percent passing a one-inch sieve and less than one percent passing a No. 4 sieve.
TYPE 8. Controlled Low Strength Materials (CLSM) shall conform to the requirements of Section 02320, “Controlled Low Strength Materials (CLSM).”
TYPE 9. Native material shall be material obtained from on-site excavations, provided the materials are not classified as unsuitable. Native material shall be free of stones, lumps, broken concrete or bituminous surfacing over 4 inches in diameter, objectionable material, vegetation, and deleterious substances.
TYPE 10. Topsoil material may be material which has been obtained at the site or may be imported. Removal of the topsoil shall be done after the area has been stripped of vegetation and debris as specified.
TYPE 11. Aggregate Subbase shall conform to the grading and quality requirements
of Section 25, “Class 2 Aggregate Subbase” of the Caltrans Standard Specifications.
TYPE 12. Trench Foundation shall be 3/4-inch crushed, angular rock meeting
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-101 Project No. C2203 the following gradation:
Sieve
Percent Passing
1 ½” 100%
1”
95-100%
½” 0-30%
#4 0-4%
2.2 UNSUITABLE BACKFILL MATERIAL
A. Any material as determined by the Engineer.
B. Any material determined to be hazardous is defined as unsuitable material.
C. Washed, smooth rock (pea gravel) is classified as unsuitable material.
2.3 USE OF BACKFILL MATERIAL TYPES
A. Backfill material types shall be used in conformance with City standards.
PART 3 EXECUTION
3.1 GENERAL
A. Where abandoned underground structures are encountered in the street areas, remove to sufficient depth to allow underground lines to cross, backfill and compact during rough grading. The Engineer may require further work to be done if visual inspection indicates during construction.
3.2 STRUCTURE EXCAVATION
A. General: Except when specifically provided to the contrary, excavation shall include the removal of all materials of whatever nature encountered, including all obstructions of any nature that would interfere with the pr oper execution and completion of the work. The removal of said materials shall conform to the lines and grades shown on the Drawings or ordered by the Engineer. The Contractor shall furnish, place, and maintain all supports and shoring that may be required for the sides of the excavations, and all pumping, ditching, or other measures required for the removal or exclusion of water, including storm water, groundwater, and wastewater reaching the site of the work from any source so as to prevent damage to the work or adjoining property. Excavations shall be supported in a safe manner in accordance with applicable State safety requirements and the requirements of OSHA Safety and Health Standards for Construction (29CFR1926) and Section 02250, “Shoring and Trench Safety.” The limits of structure excavation shall be a minimum of 12 inches beyond the outside edge of the structure, and at a minimum no larger than necessary to facilitate backfill, compaction and testing operations.
3.3 PIPELINE AND UTILITY TRENCH EXCAVATION
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-102 Project No. C2203 A. Trench Width: Unless otherwise shown or directed, excavation for pipelines and utilities shall be open-cut trenches. Trench widths shall be as noted on the plans.
B. Subgrade: The surface of the subgrade after compaction shall be hard, uniform, smooth, self draining, and true to grade and cross section.
C. Trench Bottom: The pipe bedding shall be given a final trim establishing grade such that each pipe section when first laid will be continually in contact with the bedding along the extreme bottom of the pipe. Rounding out the trench bottom or bedding to form a cradle for the pipe will not be allowed. The Contractor shall excavate for bell holes and fittings.
D. Open Trench: The maximum amount of open trench permitted in any one location shall be the length necessary to accommodate the amount of pipe installed and backfilled in a single day. All trenches shall be fully backfilled at the end of each day or, in lieu thereof, shall be covered by heavy steel plates adequately braced and capable of supporting vehicular traffic in those locations where it is impractical to backfill at the end of each day.
E. Over-Excavation: Contractor shall notify Engineer if any unstable trench conditions develop in trench bottom. When ordered by the Engineer, whether or not indicated on the Drawings, trenches, tunneling pits and/or structure excavations shall be over -excavated beyond the depth shown in order to provide a firm and unyielding trench base.
3.4 OVER-EXCAVATION NOT ORDERED, SPECIFIED, OR SHOWN
A. Any over-excavation carried below the grade ordered, specified, or shown, shall be backfilled to the required grade and densified with the specified material and compaction. Such work shall be performed by the Contractor at its own expense.
3.5 EXCAVATION IN LAWN AREAS
A. Where excavation occurs in lawn areas, the sod shall be carefully removed, stockpiled, watered and preserved for replacement, unless specifically approved by Engineer in writing before Work is performed. Excavated material may be placed on the lawn provided that a tarp or other suitable method is employed to protect the lawn from damage. The lawn shall not remain stockpiled for more than 48 hours. Immediately after completion of backfilling and testing of the pipeline, the sod shall be replaced in a manner so as to restore the lawn as near as possible to its original condition. Contractor shall provide new sod, in kind, if removed sod has remained stockpiled for more than 48 hours.
B. All other landscaping shall be replaced in kind as shown on the Drawings or as directed by the Engineer. All damaged irrigation systems, including piping and electrical wiring, shall be repaired and operating properly the same day they are damaged.
3.6 EXCAVATION IN VICINITY OF TREES
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-103 Project No. C2203
A. Except where trees are shown to be removed, Contractor shall protect trees from injury during construction operations. Remaining trees shall be protected by installing protective fencing outside the dripline. No tree roots over 2 inches in diameter shall be cut without express permission of the Engineer. Trees shall be supported during excavation by any means previously reviewed by the Engineer.
B. If existing roots over one inch in diameter are cut during the course of the work, the cut faces shall be thoroughly coated with root sealer and growth inhibitor.
Exposed roots shall be covered with wet burlap to prevent them from drying out.
C. The City shall retain an arborist to evaluate the health of the trees prior to construction, formulate site-specific recommendations to maintain the health of trees during and after construction, and monitor construction near the trees at appropriate intervals.
3.7 DISPOSAL OF EXCESS EXCAVATED MATERIAL
A. The Contractor shall remove and dispose of all excess excavated material to a suitable site. The proper and legal disposal and associated costs shall be the responsibility of the Contractor.
3.8 BACKFILL - GENERAL
A. Backfill shall not be dropped directly upon any structure or pipe.
B. Unless specifically excepted by the Engineer, backfill shall not be placed until after all water is removed from the excavation.
3.9 PIPE AND UTILITY TRENCH ZONES AND BACKFILL
A. Pipe Zone:
1. The limits of Pipe Zone are shown on the plans.
2. The Pipe Zone shall be backfilled with the specified backfill material. The Contractor shall exercise care to prevent damage to the pipeline coating, cathodic bonds, or the pipe itself during the installation and backfill operations.
3. Verify pipe and manhole line and grade prior to installing Pipe Zone material.
4. Prevent flotation of sewer pipe during backfill operations.
5. Pipe Zone material to be compacted to 90% RC, with a maximum 6-inch lifts.
6. Demonstrate in the field and through compaction test results that installation and compaction efforts achieve proper compaction under the pipe haunches. This includes after the removal of shoring devices from the trench.
B. Trench Bedding: The limits of Bedding are shown on the plans.
1. After placement and compacting of the bedding material the Contractor
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-104 Project No. C2203 shall perform a final trim for establishing grade, such that each pipe section when first laid will be continually in contact with the bedding along the extreme bottom of the pipe.
2. Contractor shall support and/or hold-down the pipe during placement as necessary.
3. Bedding shall be placed to form a smooth, uniform, horizontal plane to match pipe slope.
4. Hand-excavate flanges or bell holes at each pipe joint to provide uniform support for all sections of pipe.
C. Trench Zone: After the Pipe Zone backfill has been placed as specified above, and after all excess water has completely drained from the trench, backfilling of the Trench Zone may proceed. The limits of Trench Zone are shown on the plans.
D. Utility Crossing: For any new pipeline installation that crosses under an existing electric, gas, telephone, or cable TV utility pipe(s) or conduit(s) the Contractor shall replace the existing backfill material around the existing utility pipe(s) or conduit(s) with CLSM or as directed by the Engineer. For any new pipeline installation crossing under existing storm or sanitary sewer, the contractor shall replace existing backfill material with CLSM or as directed by the Engineer. Use a concrete vibrator during backfilling operations.
3.10 PLACING AND SPREADING OF BACKFILL MATERIALS
A. Backfill materials shall be placed and spread evenly in horizontal layers. The backfill layers shall be evenly spread so that when compacted, each layer shall not exceed 6 inches in thickness. Material for mechanically compacted backfill shall be placed in 8-inch maximum lifts prior to compaction.
B. Where the backfill material moisture content is below the optimum moisture content water shall be added before or during spreading until the proper moisture content is achieved.
C. Where the backfill material moisture content is too high to permit the specified degree of compaction, the material shall be dried or replaced until the moisture content is satisfactory.
D. Backfill shall be mechanically compacted by means of tamping rollers, sheepsfoot rollers, pneumatic tire roller, vibrating rollers, or other mechanical tampers. All such equipment shall be of a size and type subject to review by the Engineer. Impact-type pavement breakers (stompers) will not be permitted.
Permission to use specific compaction equipment shall not be construed as guaranteeing or implying that the use of such equipment will not result in damage to adjacent ground, existing improvements, or new improvements. The Contractor shall make its own determination in this regard.
3.11 COMPACTION OF BACKFILL MATERIALS
A. Each layer of backfill material as defined herein, shall be mechanically
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-105 Project No. C2203 compacted to the specified percentage of maximum density. Equipment that is consistently capable of achieving the required degree of compaction shall be used and each layer shall be compacted over its entire area while the material is at the required moisture content range.
B. Flooding, ponding, or jetting shall not be used.
C. Equipment weighing more than 10,000 pounds shall not be used closer to structure walls than a horizontal distance equal to the depth of the fill against the structure wall at that time. Hand operated power compaction equipment shall be used where use of heavier equipment is impractical or restricted due to weight limitations.
D. Trench Backfill Requirements: Per City standards.
E. Compaction Requirements for Trench Bedding: Per City standards.
F. Compaction Requirements for Pipe Zone: Contractor shall conduct compaction testing, at a minimum, as follows for Pipe Zone. Additional tests will be required depending on test results and field conditions.
1. Contractor shall demonstrate successful means and methods to meet compaction required.
2. Passing tests are required at one every 300 linear feet of trench.
3.12 SOIL STABILIZATION
A. The Contractor shall install soil stabilization materials to stabilize excavations where not completely and continuously shored.
B. Additional stabilization of existing utility trench backfill and bedding materials via permeation grouting is required to prevent raveling of materials during excavation operations including coarse, granular, non-cohesive trench backfill and pipe embedment materials.
C. Utilities parallel to new sewer or storm drain mains:
1. Minimum limits of grouting shall be per the following:
a. Where separation is less than 4 feet.
b. Vertical limits shall apply to any areas disturbed by excavation and as directed by the Engineer.
D. Utilities crossing new sewer or storm drain main:
1. Minimum limits of grouting shall be per the following:
a. 2 feet beyond edge of existing utility.
b. Vertical limits shall apply to any areas disturbed by excavation and as shown directed by the Engineer.
E. For utilities not shown on the Plans, the minimum limits described for existing utilities parallel to or crossing the new sewer main shall apply.
F. The Contractor shall submit a soil stabilization plan for review.
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Technical Specifications 477 Hillcrest Wall Replacement Project Page TP-106 Project No. C2203
G. Existing gravity utilities shall be protected from grout intrusion into the utility. To protect City storm drains and existing sewers to remain in service against damage from grouting, such utilities shall be inspected using CCTV after soil stabilization to determine whether grout has penetrated the gravity utility. If grout is found in the utility, Contractor shall remove all grout and re-inspect said utility to demonstrate grout removal, at no additional cost to the owner. If desired, Contractor shall be allowed to inspect the existing gravity utilities prior to grouting to establish existing condition and at no additional cost to the City.
END OF SECTION
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APPENDIX A
DAILY WORK REPORT
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DAILY WORK REPORT
(Non-Federally Funded Project)
Project Name: File No.: Date:
Contractor: Work Hours: Weather:
Item # Description Unit New and Unforeseen Work [ ] None [ ] Yes, describe:
Equip. # Description Hours Hourly Rate Ext. Amount Emp. # Employee Name Hours Hourly Rate Ext. Amount
SUBTOTAL COST OF EQUIPMENT
Inv. # Description Unit Unit Cost Ext. Amount
SUBTOTAL COST OF MATERIALS SUBTOTAL COST OF LABOR
12% Labor Surcharge for regular time (see Special Provisions) Inv. # Description Amount 11% Labor Surcharge for overtime (see Special Provisions) Subsistence
Travel Expense
Other
TOTAL COST OF LABOR
+ 35% on labor
SUBTOTAL COST OF WORK DONE BY SPECIALISTS TOTAL COST OF EQUIPMENT, MATERIALS AND WORK + 15% on equipment and material
+ 5% on work done by specialists
TOTAL COST
MATERIAL
WORK done by specialists
LABOR
CONTRACT WORK PERFORMED
Survey Station
DIARY AND REMARKS
EQUIPMENT
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APPENDIX B
DESIGN-LEVEL GEOTECHNICAL
EXPLORATION
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Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement
Napa Office Napa, Valley Business Park T (707) 265-7936 F (707) 265-7982 504 Redwood Blvd., Suite 220 Novato, California 94947 T ( 415) 382-3444 F (415) 382-3450 September 24, 2020
File: 1465.095altr.doc
Bellecci & Associates, Inc.
2290 Diamond Blvd, Suite 100
Concord, California 94520
Attn: Mr. Robert Broestl, P.E.
Re: Geotechnical Evaluation
Retaining Wall Replacement
447 Hillcrest Road
San Carlos, California
Introduction and Project Description
This letter summarizes our Phase 1 Geotechnical Evaluation for replacement of the failed retaining wall at 447 Hillcrest Road in San Carlos, California. A Site Location Map is presented on Figure 1.
Our work has been performed in accordance with our Agreement dated August 12, 2020. The purpose of our Phase 1 services is to evaluate site geologic conditions and develop conceptual options for retaining wall replacement. The scope of our services is described in our proposal letter dated July 10, 2020, and includes a site reconnaissance to observe and document existing conditions, evaluation of relevant geologic hazards and conceptual mitigation measures, development of conceptual wall replacement options, and preparation of this report.
Issuance of this report completes the scope of our Phase 1 services. We anticipate consulting with you briefly to assist in selection of the “preferred” stabilization option following report review. Future phases of work are anticipated to include (Phase 2) Geo-Civil/Structural Design of “preferred” replacement option and (Phase 3) Geotechnical Observation and Testing during construction.
Project Description
The project generally consists of replacing an existing grouted-rock retaining wall which supports cut slopes along the upslope side of Hillcrest Road, which partially failed as a result of heavy rains in early 2020. The subject retaining wall is located along the upslope (north and east) side of Hillcrest Road, and measures approximately 150-feet long, extending from the east edge of the driveway at #447 to south edge of the driveway at #444 Hillcrest. The wall ranges from about 4- to 8-feet high and is constructed of grouted rock. The failed portion is about 50-feet long and ranges from about 6 to 8-feet high. It is understood that the City likely will elect to replace the entire 150-foot alignment.
Site Reconnaissance Observations
We performed a site reconnaissance on August 18, 2020 to observe conditions at the site. During our visit, we noted that an approximately 50-foot section of 6- to 8-foot high wall has collapsed near the center of the alignment and below the northern and central portion of the front yard at #447.
Some localized cracking and bulging was observed elsewhere along the alignment. No internal rebar or other reinforcement is apparent in exposed sections of the wall structure, although portions of the wall appear to be supported on a shallow concrete footing. No evidence of drainage improvements above or behind the wall was observed. An existing cast-iron sewer lateral is exposed near the center of the failed section.
BLD2021-00899
7.h.2
Packet Pg. 641
Attachment: 447 Hillcrest Wall Replacement Plans and Specifications (Approve Plans and Specs for the 447 Hillcrest Rd Wall Replacement Bellecci & Associates, Inc. September 24, 2020