SPECIAL PROVISIONS - El Centro, California Provisions - 8th … · Web viewAll the Work to be...

S P E C I A L P R O V I S I O N S

All the Work to be done under this contract shall be in accordance with these Special Provisions and the “GREENBOOK” Standard Specifications for Public Works Construction, latest edition, as written and promulgated by the Joint Cooperative Committee of the Southern California Chapter of the American Public Works Association and the Southern California District of Associated General Contractors of California. Copies of the Standard Specifications are available from the publisher:

BNI Building News

10801 National Blvd., Ste. 100Los Angeles, California 90064

(310) 202-7775

or

1612 S. Clementine St.Anaheim, CA 92802

(714) 517- 0970

The Standard Specifications set forth above, referred hereinafter as Standard Specifications, will control the general provisions, construction materials, and construction methods for this contract except as amended by the Plans, Special Provisions, or other contract documents. The section numbers of these Special Provisions coincide with those of the said Standard Specifications. Only those sections requiring amendment, elaboration, or specifying options, are called out

City of El CentroEighth Street and Fairfield Drive Sewer Rehabilitation Project

PART 1GENERAL PROVISIONS

SECTION 1TERMS, DEFINITIONS, ABBREVIATIONS AND SYMBOLS

1-2 DEFINITIONS[Add or redefine the following:].

AGENCY - The City of El Centro.Board - The City Council of the City of El Centro.Caltrans - The State of California Department of Transportation.CONSTRUCTION MANAGER - The individual, partnership, corporation, joint venture or other legal entity named as such by written notice from OWNER.County - The County of Imperial.Engineer – Wherever the word "Engineer" is found in these Contract Documents or in any referenced document, it shall mean the CONSTRUCTION MANAGER..

SECTION 2SCOPE AND CONTROL OF WORK

2-5 PLANS AND SPECIFICATIONS

2-5.1 General[Add the following:].

Only written authorization from the AGENCY shall be binding over any deviation or change in the Plans and Specifications. Please refer to SECTION 3 - CHANGES IN WORK for further explanation. The Contractor shall maintain a control set of Plans and Specifications on the project site at all times. All final locations determined in the field, and any deviations from the Plans and Specifications, shall be marked in red on this control set to show the as-built conditions. Upon completion of all Work, the Contractor shall return the control set to the CONSTRUCTION MANAGER. Final payment will not be made until this requirement is met. Reference in the Special Provisions to "State Standard Specifications" shall mean the Standard Specifications, latest edition, of the State of California, Department of Transportation. Copies of these specifications may be obtained from:

State of California - Department of General ServicesPublications Distribution Unit


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P.O. Box 1015North Highlands, California 95660

Reference in the Special Provisions to Standard Plans shall mean the Standard Plans of the City of El Centro, and where applicable, the following:

Standard Plans for Public Works Construction, published by the American Public Works Association, latest edition.

Standard Plans, published by the Imperial County Irigation District.

Standard Plans, published by the State Department of Transportation, latest edition.

2-5.1.1 Agency Supplied Plans and Specifications

The City shall supply no more than 5 sets of plans and specifications for the Contractor’s use. Additional copies are the responsibility of the Contractor. The Contractor may elect to reproduce existing sets, or purchase additional sets directly through the City’s reprographics company.

2-5.3 Submittals [Add the following:].

The contractor shall submit the names and addresses of all suppliers of mineral construction materials, and the mine from which the materials were obtained, along with a copy of the Office of Mine Reclamation AB3098 List showing that the mining operation is listed, prior to delivering any mineral construction materials to the project site. This documentation regarding the AB3098 List shall be made a part of every submittal required on the project that includes mineral construction materials. Failure to identify the supplier and the mine may result in rejection of the submittal.

2-9 SURVEYING

2-9.1 Permanent Survey Markers

[Revise the first three sentences of the first paragraph to read:].

The Contractor shall notify the CONSTRUCTION MANAGER, or the owner on a Private Contract, at least 7 days before starting work to allow for the preservation of survey monuments, property line and corner survey markers and bench marks. The Contractor at their cost, shall file a Corner Record referencing survey monuments subject to disturbance in the office of the County Surveyor prior to the start of construction and also prior to the completion of construction for the replacement of survey monuments. The Contractor shall not disturb survey monuments, property line and corner survey


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markers, or bench marks without the consent of the CONSTRUCTION MANAGER or the owner on Private Contracts.

[Add the following:].

When the contract does not include a pay item for the adjustment of monuments to finished grade and unless otherwise provided for in the specifications, full compensation for said adjusting shall be included in the price bid for other items of work and no additional compensation will be allowed therefore.

The contractor shall be responsible for the replacement of any survey benchmark, monument or property line and corner survey marker that is destroyed as a result of their operations.

A survey benchmark is defined as any permanent point used by the National Geodetic Survey (NGS), National Oceanic and Atmospheric Administration (NOAA), California Department of Transportation (Caltrans), Imperial County Surveyors (ICS), City of El Centro Public Works Department, or by any other public agency to establish or perpetuate a vertical datum; said point is typically a 3 3/4” aluminum disk with said agency’s stamping. Datum information for public viewing is on file at said agency.

A survey monument is defined as any permanent point as shown on file at the NGS, NOAA, Caltrans, ICS, City of El Centro Public Works Department or any other public agency; said point being used to establish or perpetuate horizontal control. These points include but are not limited to centerline street monuments or accessories to said centerline street monuments (i.e. tie points), property corners or accessories to said corners, or monuments established in connection with the Riverside County Geodetic Control Network or accessories to said monuments.

These points shall be tied out and replaced by a licensed Land Surveyor or a licensed Civil Engineer authorized to practice land surveying pursuant to sections 8700 to 8806 of the Business and Professions code of the State of California (Land Surveyors Act). The Corner Records produced from said tie-out and replacement survey shall be furnished to the City of El Centro Public Works Department as well as filed with the office of the County Surveyor indicating responsible charge (stamped), within 60 days of the final survey.

2-9.2 Survey Service

[Replace the first paragraph with the following]

The Contractor will be responsible for the accuracy of surveying adequate for construction; however the task of surveying itself shall be performed under the direction


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of a licensed Land Surveyor or Professional Engineer, whom is authorized to practice land surveying, retained or provided for by the Contractor.

[Replace the second and third paragraph with the following three

paragraphs:].

All construction surveying will be performed by or under the direction of a licensed Land Surveyor or Professional Engineer, whom is authorized to practice land surveying, retained or provided for by the Contractor. Monument preservation surveying necessary to complete the work shown on the plans and provided for in these contract documents and specifications shall also be accomplished by or under the direction of a licensed Land Surveyor or Professional Engineer, whom is authorized to practice land surveying, retained or provided for by the Contractor.

All costs to the Contractor for protecting, removing, restoring, repairing, replacing, or reestablishing monuments or accessories to monuments or costs associated with the preparation or filing of Corner Records pursuant to sections 8700 to 8806 of the Business and Professions Code shall be included in the bid item for survey monument preservation.

Payment for survey monument preservation shall be per the contract lump sum bid price and no additional compensation will be allowed therefore. When the contract does not include a pay item for monument preservation and unless otherwise provided in the specifications, full compensation for all monument preservation required to complete the work shall be included in the price bid for other items of work and no additional compensation will be allowed therefore.

2-10 AUTHORITY OF BOARD AND INSPECTION[Add the following].

The Contractor shall give at least 24 hours advance notice when he or his subcontractor will start or resume the work.

The above notice is to be given during working hours, exclusive of Saturday, Sunday or AGENCY holidays for the purpose of permitting the CONSTRUCTION MANAGER to make necessary assignments of his representatives.

If the Contractor elects to work under this contract more than 8 hrs./day or more than 40 hrs./week, Saturday, Sunday, or AGENCY holidays, he shall arrange with the CONSTRUCTION MANAGER for the required inspection service and pay the Special Inspection Fees which will be charged at the following rates:

4 hrs. or less/day - $375.004 hrs. to 8 hrs./day - $750.00


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When Special Inspection is required, the Contractor shall notify the AGENCY and pay inspection fees 24 hours in advance. If the Contractor is directed by the AGENCY to work under this contract more than 8 hrs./day or more than 40 hrs./week, the Special Inspection fee requirements will be waived.

SECTION 4CONTROL OF MATERIALS

4-1 MATERIALS AND WORKMANSHIP

4-1.4 Test of Materials[Replace the third sentence of the first paragraph with the following:].

Unless otherwise provided, all testing shall be performed under the direction of the CONSTRUCTION MANAGER and the AGENCY will bear the cost of initial testing of material and workmanship which are required by the Standard Specifications and the Special Provisions. The cost of all other tests, including the retesting of material or workmanship that fails to pass the first test, shall be borne by the Contractor.

SECTION 6PROSECUTION, PROGRESS AND ACCEPTANCE OF THE WORK

6-1 CONSTRUCTION SCHEDULE AND COMMENCEMENT OF WORK[Replace this section in its entirety with the following:].

6-1.1 PRE-CONSTUCTION SCHEDULING CONFERENCE. The AGENCY shall schedule and conduct a Pre-Construction Scheduling Conference with the Contractor’s Project Manager and Scheduler within 10 days after approval of the contract. At this meeting, the AGENCY will review the requirements of this section of the special provisions with the Contractor. The Contractor shall submit: a general bar chart displaying the major work categories, type of work activities (based on the contractors schedule of values) which show the sequence of planned operations. BETWEEN CONTRACT AWARD AND NOTICE TO PROCEED (NTP), THE CONTRACTOR IS REQUIRED TO FINALIZE, SUBMIT AND OBTAIN APPROVAL FOR THE PROJECT BASELINE SCHEDULE. THE AGENCY MAY ISSUE AN NTP, HOWEVER, ACTUAL CONSTRUCTION WORK WILL NOT BE ALLOWED TO COMMENCE UNTIL THE BASELINE SCHEDULE HAS BEEN APPROVED.


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6-1.2 GENERAL. Progress schedules will be required for this contract and shall conform to the requirements of these special provisions. Progress schedules shall utilize the Critical Path Method (CPM).

The scheduling software to be utilized for the project shall be approved by the AGENCY. An electronic copy of both the baseline schedule and any subsequent updates will be supplied to the AGENCY.

6-1.3 DEFINITIONS. The following definitions shall apply to this section:

ACTIVITY – A task, event or other project element on a schedule that contributes to completing the project. Activities have a description, start and finish dates, duration and one or more logic ties with a starting relationship and ending relationship. BASELINE SCHEDULE – The first schedule approved by the Owner that includes a level of detail sufficient to complete the work within the “Time of Completion” stipulated in the contract.

CRITICAL PATH – The longest continuous chain of activities for the project that has 0 or less days of total float. In general, a delay on the critical path will extend the scheduled completion date. CRITICAL PATH METHOD (CPM) – A logical calculation method using the sequence of activities and their interrelationships, interdependencies, resources and duration’s to determine the critical path that shows the expected start time to complete the project. EARLY COMPLETION TIME – The difference in time between the contract completion date and the current AGENCY accepted scheduled completion date.

MILESTONE – An event activity that has zero duration and is typically used to represent the beginning or end of a major portion of work category, interface or turnover of work of a project. NARRATIVE REPORT – A report that identifies; Planned vs. Actual physical percent complete of the work. Potential problem areas. Current and anticipated delaying factors and their impact. Activities actual start and finish dates. Proposed changes in schedule logic of controlling activities, their expansion or

contraction of activity durations and addition or deletion of activities. Explanation for changes in the critical path, scheduled completion date. Out-of- sequence work and any other topics related to job progress or scheduling. SCHEDULE REVISION – A change in the future portion of the schedule that modifies logic; alters construction sequences such as performing sequential activities


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concurrently or concurrent activities sequentially; adds or deletes activities or significantly alters activity duration’s as determined or accepted by the CONSTRUCTION MANAGER as either a recovery schedule or revised contract completion date as a result of an approved change order allowing a time extension. SCHEDULED COMPLETION DATE – The planned project finish date shown on the current accepted schedule.

TWO WEEK “LOOK AHEAD” SCHEDULE– A two week look ahead schedule developed from the most current schedule update which outlines future project activities, deliverables, and planned milestones occurring within the upcoming two week period. This schedule should include one previous workweek.

6-1.4 BASELINE SCHEDULE. The baseline schedule will reflect the scope of work identified in the specifications, including the bid item descriptions and costs as well as for all levels of detail as approved in the schedule of values. The work shall be executed in the sequence indicated in the accepted baseline schedule and subsequent accepted updates and revisions.

The degree of detail in the baseline schedule shall include factors to the satisfaction of the CONSTRUCTION MANAGER, including, but not limited to:

1. Contract start and finish milestones.2. Activities associated with each specification submittal (Develop, Review/Approve

and if necessary, Re-Develop, Re-Review/Approve) will be kept (grouped) together in the schedule by coding. The duration for the AGENCY’s “Review/Approval” of submittals will be 20 working days.

3. Baseline schedule activities will contain actual start or finish dates as well as percent completes.

4. “Punch list and Final Cleanup” activity. Early completion time shall be considered a resource for the exclusive use of the Contractor. The Contractor may increase early completion time by increasing production or reallocating resources to be more efficient or by proposing, and the AGENCY accepting, contract change orders that result in significant Contractor development and investment or from an appropriate share of an accepted Cost Reduction Incentive Proposal.

6-1.5 SCHEDULE UPDATES

1. Twice each month, or as specified by the AGENCY, the Contractor shall meet with the Public Works Inspector and CONSTRUCTION MANAGER to review/approve contract progress prior to updating the schedule (as a minimum - actual starts, finishes, percent completes and remaining durations).

2. The data date, for progress cut-offs, will be determined and approved by the CONSTRUCTION MANAGER at the Pre-Construction Conference. The Contractor will submit, to the CONSTRUCTION MANAGER, an update of the


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project schedule that reflects the approved progress – previously agreed to between the Contractor and Public Works Inspector.

3. The baseline schedule or most currently approved target schedule will be shown with each of the current schedule updates.

4. Rejected schedule updates will be re-submitted within 2 days, at which time a new review period of 2 days will begin.

6-1.6 SCHEDULE REVISIONS 1. Schedule revisions will be considered when:

a. Requested by the CONSTRUCTION MANAGER or AGENCY.b. Contractor or the CONSTRUCTION MANAGER believes that an approved

or anticipated change order will impact the critical, near critical path, contract progress or completion date.

c. There is a significant change in the Contractor’s operations that affects the critical or near critical path(s).

2. If a schedule revision meets one of the above criteria:a. Contractor shall request a revision in writing with specific detail, within 5

days of a delay, and;b. Contractor shall submit, for review, a Time Impact Analysis, that consists of

the following: 1. Affected activities in the schedule, including impact(s) on the entire

project.2. A schedule update (fragnet), with the current data date, to reflect the

project condition just prior to and including the requested change.3. Contractor shall submit, within 10 days of approval, a revised CPM

network for final approval. 3. The Contractor may give Notice Of Potential Claim (NOPC), if both parties cannot

reach agreement. 6-1.6.1 EVENTS THAT MAY TRIGGER A SCHEDULE REVISION 6-1.6.1.1 AGENCY Request. These events can translate into project delays, which by contract, allows the contractor to be compensated. A change order may be issued to cover, either or both, time and money.

Site access delay(s) Changed condition(s) Utility interference(s) Late submittal review(s) Design change(s) (errors / omissions) 6-1.6.1.2 Contractor Request. These events can translate into project delays, which, by contract, are the contractors’ responsibility to mitigate with a recovery schedule, or may be faced with liquidated damages.


SP 8

Labor Problems Material Delays Equipment Breakdowns Administrative Requirements (late submittals, permits etc) 6-1.6.2 SCHEDULE REVISION PROCESS. The schedule revision process that addresses incorporating change order(s) into the schedule are as follows:

6-1.6.2.1 CHANGE ORDER PROCESS1. For each change order, the new work, that is a change to the latest approved scope of

work, is identified.2. The contractor provides a cost estimate, if required, for performing the new work for

each change order.3. The contractor provides the amount of time required, if any, to perform the new

work for each change order.4. If the change order will impact the Critical Path, the contractor shall submit a

revised construction schedule showing the impact of the change order on the overall project schedule.

6-1.6.2.2 SCHEDULE REVISION

1. Contractor submits a revised schedule reflecting the approved time impact. 2. This becomes the new baseline, when approved, for tracking the contractor’s

work performance. 6-1.7 REPORTS

6-1.7.1 Narrative Report. This report will be submitted with each schedule update and

organized by:1. Contract completion date status (Early? /Late?)

Ahead / Behind schedule and number of days If date changes, explain the cause

2. Work completed during the period3. Description of the current critical path.4. Current and anticipated delays:5. Pending items and status thereof:

Permits Equipment deliveries Change orders Time adjustments Non-compliance notices

6-1.7.2 Bar Charts.

Baseline Schedule – Once approved, the CONSTRUCTION MANAGER will finalize the desired format and the Contractor will provide 2 plotted copies (36”x42”) to the AGENCY.


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Schedule Updates – Once the baseline schedule is approved, the Contractor will provide 2 copies of the updated schedule in the same format and size as that of the baseline. (11”x17”)

6-1.7.3 Other Reports. The AGENCY may use aforementioned electronic data to generate the majority of reports not covered above. The CONSTRUCTION MANAGER may request, from time to time, other reports.

SECTION 7RESPONSIBILITIES OF THE CONTRACTOR

7-1 CONTRACTOR'S EQUIPMENT AND FACILITIES[Add the following:].

A noise level limit of 95 dbl. at a distance of 50' shall apply to all construction equipment on or related to the job whether owned by the Contractor or not. This requirement in no way relieves the Contractor from responsibility for complying with local ordinances regulating noise level.

7-2 LABOR

7-2.2 Laws[Add the following:].

The Contractor, and all subcontractors, suppliers and vendors, shall comply with all AGENCY, State and Federal orders regarding affirmative action to ensure equal employment opportunities and fair employment practices. Failure to file any report due under said orders will result in suspension of periodic progress payments.

The Contractor shall ensure unlimited access to the job site for all equal employment opportunity compliance officers.

7-5 PERMITS[Delete Subsection in total and substitute with the following:].

Prior to the start of any work, the Contractor shall take out the applicable AGENCY permits and make arrangements for AGENCY inspections. The AGENCY will issue the permits at no charge to the Contractor. The Contractor and all subcontractors shall each obtain an AGENCY business license, and shall be licensed in accordance with State Business and Professions Code. The Contractor, at no additional cost to the AGENCY, shall also obtain any and all other permits, licenses, inspections, certificates, or authorizations required by any governing body or entity.


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The CONTRACTOR shall comply with the State Water Resources Control Board (SWRCB) Order No. 99-08-DWQ National Pollutant Discharge Elimination System (NPDES) General Permit No. CAS000002. The CONTRACTOR shall prepare and submit a Notice of Intent (NOI) and a Notice of Termination, (NOT) to the Colorado River Basin Water Quality Control Board and the City of El Centro in accordance with the General Permit Requirements and Conditions. The contractor shall prepare a Storm Water Pollution Prevention Plan (SWPPP) for review and approval by the City of El Centro.

Once the City approves the SWPPP, it is the Contractor’s responsibility to implement and maintain all measures outlined in the SWPPP and permit, (including documented inspections prior to, during and following a rain event) throughout the duration of the project. The City reserves the right to require the CONTRACTOR to revise or modify any and all approved SWPPP as necessary to be in compliance with the permit requirements. In the event modifications are required to the SWPPP, it is the Contractor’s responsibility to re-submit it to the City for review and approval.

A copy of the Fact Sheet for Water Quality Order 99-08-DWQ and General Permit Waste Discharge requirements can be viewed at www.swrcb.ca.gov /stormwtr/construction.html.

The CONTRACTOR shall comply with the Colorado River Regional Water Quality Control Board Order No. R8-2003-0061 National Pollutant Discharge Elimination System (NPDES) No. CAG998001 – General Waste Discharge Requirements for Discharges to Surface Waters that Pose an Insignificant (De Minimus) Threat to Water Quality”. The CONTRACTOR shall be responsible for the submission of required filing information to the City of El Centro at least 20 working days prior to the start of any de-watering activities that are covered under the Permit. The CONTRACTOR shall be responsible for the implementation of all field activities associated with Permit compliance, including the implementation of all BMPS and the monitoring and sampling requirements. The sampling results shall be presented to the City of El Centro for reporting to the Water Board.

7-8 PROJECT SITE MAINTENANCE

7-8.1 Cleanup and Dust Control

[The second paragraph is amended to read:].

Unless directed otherwise by the CONSTRUCTION MANAGER, the Contractor shall furnish and operate a self-loading motor sweeper with spray nozzles at least once each working day to keep paved areas acceptably clean wherever construction, including restoration, is incomplete.


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7-8.4 Sanitation[Add the following:].

Secondary containment shall be provided with portable toilets.

7-9 PROTECTION AND RESTORATION OF EXISTING IMPROVEMENTS[Delete the second paragraph and substitute with the following:].

The Contractor shall relocate, repair, replace or reestablish all existing improvements within the project limits which are not designated for removal (e.g., curbs, gutters, sidewalks, driveways, fences, walls, sprinkler systems, signs, utility installations, pavements, and structures.) which are damaged or removed as a result of his operations.

Where existing traffic striping, pavement markings and curb markings are damaged or their reflectivity reduced by the Contractor's operations, such striping or markings shall also be considered as existing improvements and the Contractor shall repaint or replace such improvements.

Relocations, repairs, replacements or reestablishments shall be equal to the existing improvements and shall match such improvements in finish and dimensions unless otherwise specified.

[Delete the last paragraph and substitute the following:].

All cost to the Contractor for protecting, removing, restoring, repairing, replacing, or reestablishing existing improvements shall be included in the bid in other items of work unless otherwise specified.

7-10 PUBLIC CONVENIENCE AND SAFETY

7-10.1 Traffic and Access[Add the following:].

All traffic control shall be in accordance with the latest edition of the following documentation: FHWA – Manual on Uniform Traffic Control Devices (MUTCD); Caltrans – Manual of Traffic Control Devices for Construction and Maintenance Work Zones, MUTCD 2003 California Supplement, Sign Specifications, Standard Plans, Standard Specifications; the AGENCY's Maintenance Work Traffic Control Manual; American Public Works Association Southern California Chapter – Work Area Traffic Control Handbook.

Within 30 calendar days after notification of award, the Contractor shall submit, for review and approval by the CONSTRUCTION MANAGER, a Traffic Control Plan. The Traffic Control Plan shall be signed and stamped by a civil engineer or a traffic engineer familiar with the preparation of traffic control plans and licensed by the State of


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California. The plans shall incorporate, as a minimum, the following requirements of Section 7-10.3.

Upon approval of the Traffic Control Plan by the City, approval of the Contractor’s schedule by the City and execution of the Contract documents by both parties, the City will issue a Notice to Proceed specifying the Contract start date (first day of work).

The Contractor shall provide, to the CONSTRUCTION MANAGER, a telephone number at which the Contractor's representatives can be reached, at any hour, should an emergency occur requiring replacement or relocation of the required traffic control devices.

Prior to the start of construction, the Contractor shall inform the AGENCY's Police and Fire departments of the project location, approximate starting date, completion date, and the name and telephone number of contractor representatives who may be contacted at any hour in the event of an emergency.

POLICE DEPARTMENT: 760-352-2111FIRE DEPARTMENT: 760-337-4530

The Contractor shall adhere to applicable sections of California Administrative Code, Title 8, concerning electrical and construction safety standards and practices.

Contractor shall require that an approved safety vest be worn by all personnel who are working at this project site. Any worker without a vest may be ordered off the job by the Inspector until such apparel is acquired. Questions as to approved vests shall be directed to the CONSTRUCTION MANAGER.

Prior to the beginning of work, the Contractor shall execute the provided construction traffic control plan prepared per current AGENCY guidelines to safely prosecute the construction work involved with a minimum of inconvenience to the motoring public. Any relocation of travel lanes longer than three calendar days shall be delineated by removing the existing striping and legends by wet sandblasting and placing new striping and legends as required. Upon completion of the work and the restoration of the road surface to its final condition, the Contractor shall remove temporary striping by wet sandblasting.

If the traffic cones or portable delineators are damaged, displaced or are not in an upright position, for any reason, the contractor shall immediately replace or restore to their original location, in an upright position, the cones or portable delineators.

The Contractor shall provide and maintain all signs, barricades, flashers, delineators and other necessary facilities for the protection of the motoring public within the limits of the construction area. He shall also post proper signs to notify the public regarding detours and conditions of the roadway, all in accordance with the provisions of the Vehicle Code, the current State of California Department of Transportation "Manual of Traffic Controls City of El CentroEighth Street and Fairfield Drive Sewer Rehabilitation Project

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for Construction and Maintenance Work Zones", and the State of California Department of Transportation Standard Plans.

The Contractor shall furnish such flagmen and equipment as are necessary to give adequate warning to traffic or to the public of any dangerous conditions in accordance with the current Department of Transportation "Instructions to Flagmen".

All existing traffic signs and street signs shall be maintained in visible locations during construction. Signs designated for removal shall be salvaged and delivered to the AGENCY Yard or disposed of as directed by the AGENCY.

Warning Signs

Adequate warning signs for motorists shall be placed and maintained throughout all applicable phases of the work including speed limit reduction, loose gravel, fresh oil, and open trench. Signs shall be 36" X 36" in size; shall be on site ready for placement prior to start of the applicable phase of work and shall be placed in advance on all streets approaching the work zone.

7-10.3 Street Closures, Detours, Barricades[Add the following:].

Street closures will not be allowed except as specifically permitted by the CONSTRUCTION MANAGER.

Construction Traffic Control Plans shall be prepared in accordance with the AGENCY's latest Traffic Control Plan Preparation Guidelines and shall be reviewed and approved by the CONSTRUCTION MANAGER. The Contractor shall submit the plans to the CONSTRUCTION MANAGER for approval or correction at least 10 working days before approved plans will be required for commencing the work.

Approval of the plans by the CONSTRUCTION MANAGER shall not relieve the Contractor from the responsibility for errors or omissions in the plans or from deviations from the Contract Documents. The Contractor shall be responsible for the correctness of the plans and for the results obtained by the use of such plans.

Full compensation for Construction Traffic Control Plans shall be paid for on a lump sum bid price and no additional compensation will be allowed therefore.

7-10.5 Protection of the Public[Delete Subsection in total and substitute with the following:].

It is part of the service required of the Contractor to make whatever provisions are necessary to protect the public. The Contractor shall use foresight and shall take such steps and precautions as his operations warrant to protect the public from danger, loss of life or loss of property, which would result from interruption or contamination of public City of El CentroEighth Street and Fairfield Drive Sewer Rehabilitation Project

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water supply, interruption of other public service, or from the failure of partly completed work or partially removed facilities. Unusual conditions may arise on the work which will require that immediate and unusual provisions be made to protect the public from danger or loss, or damage to life and property, due directly or indirectly to prosecution of work under this contract.

Whenever, in the opinion of the CONSTRUCTION MANAGER, an emergency exists against which the Contractor has not taken sufficient precaution for the public safety, protection of utilities and protection of adjacent structures or property, which may be damaged by the Contractor's operations and when, in the opinion of the CONSTRUCTION MANAGER, immediate action shall be considered necessary in order to protect the public or property due to the Contractor's operations under this contract, the CONSTRUCTION MANAGER will order the Contractor to provide a remedy for the unsafe condition. If the Contractor fails to act on the situation, the CONSTRUCTION MANAGER may provide suitable protection to said interests by causing such work to be done and material to be furnished as may be necessary.

The cost and expense of said labor and material, together with the cost and expense of such repairs as are deemed necessary, shall be borne by the Contractor. All expenses incurred by the AGENCY for emergency repairs will be deducted from the progress payments and the final payment due to the Contractor. However, if the AGENCY does not take such remedial measures, the Contractor is not relieved of the full responsibility for public safety.

7-12 Advertising[Delete first paragraph and substitute with the following:].

The names, addresses of the Contractor or Subcontractor shall be displayed on the project construction sign standard in Appendix B. The placement of the sign will be determined by City Staff at the pre-construction meeting, and shall be placed at this location prior to the start of work.

Full compensation for the Project Construction Sign and placement thereof shall be included in the contract price for mobilization, and no other compensation will be allowed therefore.

Doorknob notification of residents and business owners directly affected by construction and the posting of “No Parking” notification signs shall occur a minimum of 48 hours prior to construction.

SECTION 8FACILITIES FOR AGENCY PERSONNEL

8-1 GENERAL[Add the following:].


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No field offices for AGENCY personnel will be required, however, the AGENCY personnel shall have the right to enter upon the project at all times and shall be admitted to the offices of the Contractor, at any time during the operation of the Work.

SECTION 9MEASUREMENT AND PAYMENT

9-3 PAYMENT

9-3.1 General[Delete the last paragraph and substitute with the following:].

At the expiration of 35 days from the filing and recording of the Notice of Completion of the Work, the amount deducted from the final estimate and retained by the AGENCY will be paid to the Contractor except such amounts as required to be withheld by properly executed and filed to stop payment, or as may be authorized by the contract.

9-3.2 Partial & Final Payment[Amend the first sentence of the first paragraph to read:].

The closure date for the purpose of making partial progress payments will be the last day of each month. The Contractor may request, in writing, that such monthly closure date be changed. The CONSTRUCTION MANAGER may approve such request when it is compatible with the AGENCY'S payment procedure.

Each month, the Contractor shall meet with the CONSTRUCTION MANAGER, a minimum of three working days prior to the submittal of the progress payment to the AGENCY, to finalize and receive approval regarding the measurement of the Work performed through the closure date and the estimated value of the progress payment based on the contract Unit Prices or as provided for in Section 9-2. Any progress payment submitted without such approval will be considered incomplete and returned to the Contractor and no payment shall be considered until such approval is obtained.

[Add the following to the end of the section:].

Payments will be withheld pending receipt of any outstanding reports required by the contract documents. In addition, the final progress payment will not be released until the Contractor returns the control set of specifications and plans indicating the as-built conditions.

At the request and expense of the Contractor, who shall retain beneficial ownership and receive interest, if any thereon, the AGENCY shall permit the substitution and deposit therewith of securities equivalent to the amount of any monies withheld by the AGENCY.

[Add the following subsection].

9-4 BID ITEM DESCRIPTION


SP 16

9-4.1 GeneralWork under this contract will be paid on a unit price or lump-sum basis as outlined on the Bid Form for the quantity of work installed.

The unit prices and lump-sum prices include full compensation for furnishing the labor, materials, tools, and equipment and doing all the work involved to complete the work included in the contract documents.

The application for payment will be for a specific item based on the percentage completed or quantity installed. The percentage complete will be based on the value of the partially completed work relative to the value of the item when entirely completed and ready for service.

9-4.2 Work Not Listed In The Schedule of Work Items

The General Conditions and items in the Special Provisions, general requirements, and specifications which are not listed in the schedule of work items of the bid form are, in general, applicable to more than one listed work item, and no separate work item is provided therefore. Include the cost of work not listed but necessary to complete the project designated in the contract documents in the various listed work items of the bid form.

The bids for the work are intended to establish a total cost for the work in its entirety. Should the Contractor feel that the cost for the work has not been established by specific items in the bid form, include the cost for that work in some related bid item so that the proposal for the project reflects the total cost for completing the work in its entirety.

9-4.3 Bid Item Descriptions9-4.3.1 Project Mobilization, Bid Item 1

A. Method of Payment - Lump Sum

B. Method of Measurement – Percent Complete

C. Payment for Project Mobilization shall be made at the contract Lump Sum Price and shall constitute full compensation for all labor, material, equipment, and incidentals required. The bid price shall include but not limited to preliminary construction schedule, drawings and catalog submittals, delivery of equipment required to progress work, complete installation of temporary facilities, establishment on the jobsite of the initial on-site workforce, delivery of all materials, supplies and equipment required to commence work and continuing the work in accordance with the project schedule . Payment for project mobilization shall be made at the time of the first progress payment after the Contractor has purchased bonds and insurance. The bid price for mobilization shall not exceed 3 percent of the bid schedule total price for the entire project.

9-4.3.2 Insurance, Permits, Bonds, Financing, and Security Instruments, Bid Item 2



C. Payment for all required insurance coverage, permitting, bonds, taxes, and financial and security instruments required for the work shall be made at the Contract Lump Sum Price and Payment shall be determined by review of the documentation provided by the contractor for


SP 17

these items. This item includes trenching permits, preparation of and implementation of a PM-10 plan, encroachment permits, and preparation and implementation of a SWPPP plan.

9-4.3.3 Demobilization and Cleanup, Bid Item 3



C. Payment for work necessary after completion of all construction activities. This work shall include but is not limited to; demobilizing workers, moving equipment off site, etc. and general cost of works to close out construction. Percentage complete shall be determined through onsite inspection by the City.

9-4.3.4 Traffic Control During Construction, Bid Item 4



C. Payment will be based upon percentage of total road length requiring traffic control completed. Contractor is responsible to provide traffic control in compliance with local, county and State agency guidelines. Approval for traffic control planning and implementation will be the sole responsibility of the contractor and no payment will be made prior to submission to the City of written approval for a traffic control plan by the governing agency. Contractor will be responsible for all flagmen, signs, delineators, markers, barricades, and any other items required to implement the approved traffic control plan.

9-4.3.5 Construction Staking, Bid Item 5



C. Payment will be made for construction staking as a percentage of total length of staking required for the project. No payment will be made for re-staking under any circumstances. No payment will be made for survey time spent to locate control points or monuments.

9-4.3.6 Furnish and install 8-inch PVC SDR 35 sewer pipe, Bid Item 6

A. Method of Payment – Unit Price

B. Method of Measurement – Per Unit

C. Payment for the pipeline shall be made at the contract unit price per linear foot and shall constitute full compensation for all labor, material, equipment and incidentals required to furnish and install 7-inch PVC SDR 35 pipeline complete in place per the plans and specifications. The bid price shall include, but not be limited to, all excavation, dewatering, sheeting, shoring bracing, disposal of unsuitable and waste material, bedding and backfilling (including imported material or select native), compacting, assisting with compaction testing, cleaning and testing the pipeline, warning tape, protecting in place or removing and replacing all existing utilities and public and private improvements, daily sweeping and cleaning work site, and restoring all areas to pre-existing conditions.

9-4.3.7 Furnish and install 15-inch PVC SDR 35 sewer pipe, Bid Item 7




SP 18

C. Payment for the pipeline shall be made at the contract unit price per linear foot and shall constitute full compensation for all labor, material, equipment and incidentals required to furnish and install 15-inch PVC SDR 35 pipeline complete in place per the plans and specifications. The bid price shall include, but not be limited to, all excavation, dewatering, sheeting, shoring bracing, disposal of unsuitable and waste material, bedding and backfilling (including imported material or select native), compacting, assisting with compaction testing, cleaning and testing the pipeline, protecting in place or removing and replacing all existing utilities and public and private improvements, daily sweeping and cleaning work site, and restoring all areas to pre-existing conditions.

9-4.3.8 Construct 60-inch Diameter Precast Manhole and Base, Bid Item 8



C. Payment for the manhole structure shall be made at the contract unit price per unit and shall constitute full compensation for all labor, material, equipment and incidentals required to furnish and install 60-inch Precast Manhole and Base complete and in place per the plans and specifications. The bid price shall include, but not be limited to, all excavation, dewatering, sheeting, shoring bracing, maintaining traffic, backfilling, pavement removal, curb removal, concrete work and reinforcing, making all pipe connections, setting pipe stubs and plugs for future connections, interior and exterior protective coatings, protection of existing utilities, protection of adjacent facilities and structures, all testing, and all other work incidental to the installation of the sewer manhole.

9-4.3.9 Furnish and Install 24-inch Manhole Frame and Covers, Bid Item 9



C. Payment for the manhole structure shall be made at the contract unit price per unit and shall constitute full compensation for all labor, material, equipment and incidentals required to furnish and install 24-inch manhole frame and covers complete and in place per the plans and specifications.

9-4.3.10 Adjust Manhole Frames and Covers to Finish Grade, Bid Item 10



C. Payment for adjusting manhole rings and covers to finish grade shall be made at the contract unit price per unit and shall constitute full compensation for all labor, material, equipment and incidentals required to complete the work. The contract unit price shall include, but not limited to, asphalt cutting and removal, grouting of grade rings, constructing manhole collar per Plan Detail Sheet D3, cleaning, and adjustment.

9-4.3.11 Core drill and Tie-in to Existing Manhole, Bid Item 11



C. Payment for the manhole structure shall be made at the contract unit price per unit and shall constitute full compensation for all labor, material, equipment and incidentals required to


SP 19

core drill, make connection seal, connect to and re-channel the existing manhole in accordance with the plans and specifications or as directed by the Engineer.

9-4.3.12 Furnish and Install 4" Sewer Lateral Assembly, Bid Item 12



C. Payment for the lateral assembly shall be made at the contract unit price per unit and shall constitute full compensation for all labor, material, equipment and incidentals required to install the assembly as show on the Contract Drawings. The contract unit price shall include, but not limited to, trenching, connecting to new pipeline, bedding, backfilling, compacting, placing temporary pavement, protecting in place or removing and replacing all existing utilities and public and private improvements.

9-4.3.13 Furnish and Install 4" Sewer Lateral Extension, Bid Item 13



C. Payment for the lateral extension shall be made at the contract unit price per unit and shall constitute full compensation for all labor, material, equipment and incidentals required to install the assembly as show on the Contract Drawings. The contract unit price shall include, but not limited to, trenching, connecting to new pipeline, bedding, backfilling, compacting, placing temporary pavement, flushing, testing, protecting in place or removing and replacing all existing utilities and public and private improvements.

9-4.3.14 Pavement Removal and Restoration



C. Payment will be made at the contract price at the applicable unit price per square foot to remove and replace asphalt required to construct the sewer per design drawings. Measurement for the asphalt will be made based upon a removal and replacement section as indicated on the Contract Drawings, centered on the constructed pipeline and appurtenances. The unit price shall include, but not be limited to, marking out limits of paving as directed by the engineer, saw cutting existing asphalt, removing and disposing of existing pavement, compacting subgrade to 95% relative compaction, furnishing and applying tack coat, furnishing, placing and compacting asphalt concrete pavement including base and overlay pavement to 95% relative compaction, furnishing and placing fog seal, and placing final traffic striping. Replacement asphalt material and sections shall conform to City of El Centro standard specifications and all applicable local and state agency standards for roadway reconstruction. Base material removed will not be permitted to be reused, and if required, must be replaced as part of the work required to replace the asphalt section removed.

9-4.3.15 PCC Sewer Encasement for Utility Crossing, Bid Item 15



C. Payment for utility crossing encasements shall be made at the contract unit price per unit and shall constitute full compensation for all labor, material, equipment and incidentals required


SP 20

to complete the work. The contract unit price shall include, but not limited to trenching, forming, reinforcing steel, concrete, and related items required to complete the encasement.

9-4.3.16 Abandon Existing Manholes, Bid Item 16



Payment for abandoning existing manholes shall be made at the contract unit price per unit and shall constitute full compensation for all labor, material, equipment and incidentals required to complete the work. The contract unit price shall include, but not limited to traffic control, pavement removal, manhole structure and appurtenance removal, disposal, backfilling, bulk heading and pipe sealing, slurry filling, and pavement restoration required to abandon existing manholes per Plan.


SP 21

PART 2

CONSTRUCTION MATERIALS

SECTION 201CONCRETE, MORTAR AND RELATED MATERIALS

201-1 PORTLAND CEMENT CONCRETE

201-1.1 PORTLAND CEMENT CONCRETE

201-1.1.2 Concrete Specified By Class and Alternate Class[Add the following:].

Concrete used for precast concrete components and for cast-in-place manhole bases shall be 660-C-4000 (Class A) concrete. Concrete for pipe bedding, encasement, anchors, and thrust blocks, or wall support for pipe shall be either 560-C-3250 (Class A) or 450-C-2000 (Class B), at the Contractor’s discretion. Concrete for cast-in-place water bearing structures shall be as required and approved by the CONSTRUCTION MANAGER on a case-by-case basis.

Water. Adjust quantity of water so concrete does not exceed maximum slumps specified when placed; use minimum necessary for workability required by the part of the structure being cast. Measure consistency of concrete in accordance with ASTM C143.

201-1.2 Materials

201-1.2.1 Portland Cement [Add the following:].

Only Type V, ASTM C-150 Portland Cement shall be used.

201-1.2.4 Chemical Admixtures [Add the following:].

No admixtures shall be allowed with calcium chloride or triethanolamine. Admixtures used in combination shall be physically and chemically compatible and shall be so certified by each admixture manufacturer and by Testing Laboratory that prepared respective mix design.


SP 22

201-1.4 Mixing[Add the following:].

Job mixing of concrete will not be allowed. Concrete will not be accepted without a batch ticket. Exceptions to these requirements will not be allowed.

201-5 CEMENT MORTAR[Add the following:].

Where shown on plans or specified, Class C cement mortar shall be used. Mortar shall not be allowed to stand after mixing for more than thirty (30) minutes.

207-17 PVC PLASTIC PIPE

207-17.1 General.[Add the following:].

Wrinkles, blistering, or any interior or exterior imperfections of PVC pipe shall be subject to rejection at the discretion of the Public Works Inspector.

[Replace Table 207-17.1 (A) with the following:].

Nominal Size ASTM Wall Thickness Minimummm Inches100-375 (4-15) D 3034 SDR 35450-915 (18-36) F 679 SDR 35

[Add the following].PVC pipe and fittings shall be made in accordance with ASTM D3034 or ASTM F679 and ASTM D1784 in physical, dimensional and chemical requirements, and shall have a minimum pipe stiffness of 115 psi when tested in accordance with ASTM D2412. The standard laying length shall be 20 feet (20’) (plus/minus) 1-inch. A maximum of 15% may be furnished in random lengths of not less than 10 feet (10’) each.

207-17.3 Joining Systems.

207-17.3.1 General[Add the following:].

All PVC pipe and fittings shall be furnished with integral bells and elastomeric gasket joints. All connections to manholes shall be completed using A-LOK gaskets or equal in accordance with Section 208-6 of the Greenbook.


SP 23

Saddles shall be made from an approved "Y" Type PVC saddle fitting which is attached to the pipe by first cleaning the pipe with an approved cleaner and then solvent welding the saddle to the pipe. The assembly and installation shall conform to the manufacturer's requirements.


SP 24

PART 3CONSTRUCTION METHODS

SECTION 300EARTHWORK

300-1 CLEARING AND GRUBBING

300-1.3 Removal and Disposal of Materials.

300-1.3.1 General[Delete Subsection in total and substitute with the following:].

No burning will be permitted.

No accumulation of flammable material shall remain on or adjacent to the right-of-way. The roadway and adjacent areas shall be left with a neat and finished appearance.

In order to protect the public streets from deterioration due to hauling of materials, the Contractor shall submit, prior to the pre-job meeting, for approval a proposed route for hauling of materials for disposal. Upon approval, the Contractor shall strictly adhere to that route, unless written permission from the CONSTRUCTION MANAGER is obtained to change the route.

300-2 UNCLASSIFIED EXCAVATION


Removal of asphalt concrete, aggregate base and native soil shall be made at the locations shown on the plans, or as specified in the field by the CONSTRUCTION MANAGER. Asphalt pavement shall be removed to clean straight lines by saw cutting.

The areas and quantities shown on the plans are given only for the Contractor's aid in planning the Work and preparing bids. No guarantee is made that areas or quantities shown will equal the areas or quantities designated by the CONSTRUCTION MANAGER.

300-2.9 Payment[Add the following:].

Unless directed otherwise by the CONSTRUCTION MANAGER, stockpiling of removal material will not be allowed in or around the project site.

Said payment shall also include full compensation for all required saw cutting of removal areas. City of El CentroEighth Street and Fairfield Drive Sewer Rehabilitation Project

SP 25

SECTION 301TREATED SOIL, SUBGRADE PREPARATION, AND PLACEMENT

OF BASE MATERIALS

301-1 SUBGRADE PREPARATION

301-1.6 Adjustment of Manhole Frame and Cover Sets to Grade[Add the following:].

Comply with the requirements of the City with regard to adjustment of manhole frame and cover sets prior to new paving and/or prior to overlay, as appropriate. Adjustment of manhole frame and cover will be inspected for good workmanship, soundness, and watertightness by City Inspector. Repair any items required for reinspection.

SECTION 302ROADWAY SURFACING

302-5 ASPHALT CONCRETE PAVEMENT


Tarpaulins shall be used to cover all loads from plant to project.

Each layer of asphalt concrete shall not exceed 0.25 foot in compacted thickness. Each layer shall be completely placed and compacted prior to commencement of successive layers. Tracks or wheels of spreading equipment shall not be operated on the top layer of asphalt concrete in any area until final compaction has been completed.

Three-wheeled rollers shall not be permitted, and pneumatic rollers shall be used only on lower layers.

Initial breakdown compaction shall consist of a minimum of three coverages of layer of asphalt mixture. A pass shall be movement of a roller in both directions over the same path. A coverage shall consist of as many passes as are necessary to cover the entire width being paved. Overlap between passes during any coverage, made to insure compaction without displacement of material in accordance with good rolling practices, shall be considered to be part of the coverage being made and not part of a subsequent coverage. Each coverage shall be completed before subsequent coverage is started.

Prior to placement of asphalt concrete, a tack coat of SS1H emulsified asphalt shall be applied to all contract surfaces.City of El CentroEighth Street and Fairfield Drive Sewer Rehabilitation Project

SP 26

An asphalt leveling course shall be applied in depressed areas in accordance with the plans and/or as directed by the CONSTRUCTION MANAGER. An automatic leveling device shall be used on the paver unless omitted by the CONSTRUCTION MANAGER.

Longitudinal joints between successive paving runs shall coincide with the traffic lanes lines. Contractor will be provided with striping plans for those roads where the striping will change prior to the start of work. Local streets will not be striped except for special cases for which striping plans will be provided. All other roads will be striped to match the existing pattern.

302-5.2 Cold Milling Asphalt Concrete Pavement

302-5.2.1 General[Replace the last sentence of the first paragraph with the following:].

The surface tolerance permitted as measured along a 10 foot straight edge shall be 3/8 inch laterally (except in crown areas) and 3/16 inch longitudinally. If in the judgment of the CONSTRUCTION MANAGER, the joint cut varies from a straight line or ravels excessively, he may require the longitudinal joint to be saw cut.

302-5.2.2 Equipment[Add the following:].

The planing machine shall plane without tearing or gouging the underlying surface, shall be adjustable as to crown and depth by tilting the drum axis, and shall be capable of cutting sharp straight longitudinal edge joints in the pavement.

302-5.5 Distribution and Spreading[Add the following:].

Prior to placing asphalt pavement overlay, all vegetation shall be removed from the cracks in the pavement and all joints between the pavement and concrete gutters by the Contractor. The surface to be overlaid shall be cleaned by the Contractor to remove moisture, dirt, grease, or other foreign matter which would reduce the bond between the overlay and the pavement.

302-5.8 Manholes[Delete Subsection in total and substitute with the following:].

The manhole and valve box locations and distance from curb to center shall be marked on the curb face by the Contractor.

The method of adjusting manholes in areas for resurfacing shall be as follows:


SP 27

The asphalt pavement immediately adjacent to the manhole shall be removed, the manhole shaft extended with adjustment ring(s) to proper grade, the manhole frames and covers replaced, the manhole frames set in concrete, and the pavement replaced with a minimum of 2 inches of asphalt concrete. The finished grade of the water valve frame and cover shall be ¼ inches below the finish grade of the asphalt pavement.

The Contractor shall notify affected utility owners at least 5 working days in advance of the need to commence work required prior to paving operations and again for work required after paving operations. The Contractor shall mark locations of utility vaults where utility companies specifically state adjustments shall be made after paving. If it is found to impractical for the utility owner to complete remodeling or adjustment to structures, as evaluated by the CONSTRUCTION MANAGER, then the Contractor shall be absolved of further responsibility in connection therewith, and the structure shall be adjusted to grade by the utility owner under permit or ordinance procedure established by the AGENCY for utility cuts in pavement.

Any new concrete surface on the inside of an AGENCY sewer manhole shall be applied with a Zebron or Sancon coating or an approved equal.

Payment for sewer manhole coating and manhole adjusting will be made at the contract unit bid price per each which shall constitute full compensation.

302-7 PAVEMENT FABRIC[Amend heading to read:].

302-7 PAVEMENT FABRIC & PAVEMENT REPAIR MEMBRANE

302-7.2 Placement

302-7.2.1 Pavement Preparation[Add the following:].

The entire surface to be covered shall be free of water, foreign matter, vegetation, or dust before application of the pavement fabric.

SECTION 303CONCRETE AND MASONARY CONSTRUCTION

303-1 CONCRETE STRUCTURES

303-1.8 Placing Concrete.

303-1.8.1 General.City of El CentroEighth Street and Fairfield Drive Sewer Rehabilitation Project

SP 28

[Add the following:].Concrete shall not be placed until reinforcing steel and forms have been inspected and approved.

303-1.11 PAYMENT[Add the following sections after section 303-1.11]

303-1.12 Water Testing Concrete Structures

All concrete structures shall be tested for water tightness by the Contractor. Units shall be filled to normal operating level, as shown on plans. Any noticeable leaks shall be repaired and, if necessary, the test shall be repeated until water tightness is insured. The cost of water shall be borne by the contractor.

303-1.13 Pipelines Through Concrete Structures

Whenever a pipeline of any material terminates or extends at or through a structural wall or sump, the Contractor shall, where possible, install in advance of pouring the concrete, the fitting or special coating required for the particular installation.

Whenever any run of pipe is installed subsequent to placing of concrete, the Contractor shall accurately position the opening in the concrete for such pipelines. Openings shall be of sufficient size to permit a perfect final alignment of pipelines and fittings without deflection of any part and to allow adequate space for satisfactory packing where pipe passes though the wall to insure water tightness around openings so formed. The boxes or cores shall be provided with continuous keyways to hold the filling material in place and to insure a water tight joint. Boxes or cores shall be grouted with non-shrink grout, using Embeco, or equivalent.

SECTION 306UNDERGROUND CONDUIT CONSTRUCTION

306-1 OPEN TRENCH OPERATIONS

306-1.1 Trench Excavation

306-1.1.1 General[Add the following].

The requirements of the ASTM D2321 shall be followed for the installation of all piping systems. Trench width shall be as indicated on the construction drawings and per Table 306-1.2.13.


SP 29

Excavated material suitable for backfilling shall be piled in an orderly manner a sufficient distance from the excavated banks to avoid overloading and to prevent slides or cave-ins. Excavation surfaces shall be graded as necessary to prevent surface water from flowing into the trenches.

Backfilling PVC Pipe Trenches. The Contractor shall excavate to a depth as shown on the Construction Drawings and crushed rock shall be placed to insure a minimum cover of 1'-0" over top of pipe as specified on the Drawings.

306-1.1.1 General [Revise the third paragraph to read as follows].

Excavation shall include the removal of all water and materials of any nature which interfere with the construction work. Removal of groundwater to a level below the structure or pipe subgrade shall be done at the direction of the CONSTRUCTION MANAGER.

[Replace the last sentence in the third paragraph and add the following:]

If groundwater is encountered, the Contractor shall dispose of it by any method acceptable to the CONSTRUCTION MANAGER. The cost of any dewatering shall be included in the cost of pipe construction and no additional compensation will be allowed therefore.

[Add the following:]

Upon approval by the CONSTRUCTION MANAGER, when backfilling operation of an excavation in the travel way, whether transverse or longitudinal cannot be properly completed within a work day, steel plate bridging with a nonskid surface and shoring may be required to preserve unobstructed traffic flow. In such cases, the following shall apply:

1. Steel plate used for bridging must extend a minimum of twelve (12”) inches (300 mm) beyond the edge of the trench.

2. Steel plate bridging shall be installed to operate with minimum noise.

3. The trench shall be adequate to support the bridging and the traffic load. Contractor shall be responsible for determining whether shoring is necessary.

4. Temporary paving with cold asphalt concrete shall be used to feather the edges of the plate.

5. Bridging shall be secured against displacement by adjustable cleats, shims, or other devices.


SP 30

Approaches plate and ending plate (if longitudinal placement) shall be attached to the roadway by a minimum of two (2) dowels pre-drilled into the corners of the plate and drilled two (2”) inches (53 mm) into the pavement. Subsequent plates are butted to each other. Fine graded asphalt concrete shall be compacted to form ramps, maximum slope of 8.5% with a minimum of twelve (12”) inches (300 mm) taper to cover all edges of the steel plates. When steel plates are removed, the dowel holes in the pavement shall be backfilled with either fines of asphalt concrete mix, concrete slurry or an equivalent slurry satisfactory to the CONSTRUCTION MANAGER.

The Contractor shall be responsible for maintenance of the steel plates, shoring, and asphalt concrete ramps.

Unless specified, use of steel plate bridging at any given location should not exceed four (4) consecutive working days in any given week. Trench plates need to be set flush with pavement and secured in place as noted above for any durations over (4) days upon approval of the CONSTRUCTION MANAGER. Backfilling of excavation shall be covered with a minimum of three (3”) inches (78 mm) of temporary layer of cold asphalt concrete.

The following table shows the required minimal thickness of steel plate bridging for a given trench width:

Trench Width Minimum Plate Thickness1.0 foot (300 mm) ½ inch (13 mm)1.5 foot (450 mm) ¾ inch (19 mm)2.0 feet (600 mm) 7/8 inch (22 mm)3.0 feet (900 mm) 1 inch (27 mm)4.0 feet (1200 mm) 1 ¼ inch (35 mm)

For spans greater than four (4’) feet (1200 mm), a structural design for the steel plate bridging shall be prepared by a registered civil engineer and approved by the CONSTRUCTION MANAGER. Steel plate bridging shall be designed for HS20-44 truck loading per Caltrans Bridge Design Specifications Manual. The Contractor shall maintain steel plates with a non-skid surface having a minimum coefficient of friction equivalent to 0.35 as determined by California Test Method 342. The Contractor may use standard steel plate with known coefficient of friction equal or exceeding 0.35.

Payment for steel plate bridging shall be included in the other items of work involved and no additional payment will be allowed therefore.

306-1.1.3 Maximum and Minimum Width of Trench[Replace the first paragraph with].


SP 31

If any trench, through the neglect of the Contractor, is excavated below the bottom grade as required by the profiles, it shall be refilled to grade, at the Contractor’s expense for all labor and materials, with ½” crushed rock for nominal pipe sizes up to 15” and ¾” crushed rock for pipe sizes greater than 15”.

The requirements of the ASTM D2321 shall be followed for the installation of all piping systems with particular regard to the allowable depth of shoring systems wider than the maximum allowable width of trench specified herein. Such shoring systems shall not extend below the top of pipe with all excavation below that elevation being done by smaller trenching tools or by hand.

306-1.1.5 Removal and Replacement of Surface Improvements [Add the following].

Shrubbery, trees and sod, fences, property survey corners or markers, and other surfaces disturbed, shall be restored to a condition equal to that before the work began by the Contractor at his expense, furnishing all labor and materials incidental thereto.

306-1.1.7 Handling and Storing Pipe[Add a new paragraph].

During storage, handling, and transporting, every precaution shall be taken to prevent injury to pipe. Pipe shall be handled only by means of pipe manufacturer approved hooks on ends of sections, by means of dual fabric slings, or other methods approved by the CONSTRUCTION MANAGER for the pipe used. PVC pipe shall not be stored in direct sunlight. Store any rubber or neoprene materials in enclosures. Pipe shall be stored on shipping supports, or by other method approved by the pipe manufacturer or CONSTRUCTION MANAGER. Under no circumstances shall backfill be dropped onto any type of sewer or force main pipeline in a manner that is determined by the CONSTRUCTION MANAGER to be detrimental to the pipe.

306-1.1.8 Construction of Sewer Manholes[Add a new paragraph].

Manholes shall be constructed in accordance with the Construction Drawings and the City Standard Drawings. In addition, the following miscellaneous requirements apply:

1. Manhole units shall be precast in steel forms, and consolidation of the concrete in the forms shall be secured by vibration. All units shall conform to the size, shape, form, and details shown on the Drawings.

2. Precast concrete manhole rings, cones and pipe sections required for pipeline structures shall be of the dimensions indicated on the drawings. They shall be made of 660-CW-4000 (Class A) concrete as described in Division 2 Part 2 of these specifications.

3. For Bonding and grouting use “Masterflow 713", manufactured by Master Builders, “Sauereisen F-100", produced by Sauereisen Cements Co., or


SP 32

equal nonmetallic, nonshrinking, nonstaining, premixed, water and oil resistant, high-strength grout by Sika Products or equal.

4. Curing of precast concrete units shall be either by water curing or by membrane curing compound as specified in ASTM Designation C 478-72.

5. Each manhole section shall be set in a bed of mortar to make a watertight joint and shall be nearly pointed on the inside and shall be set perfectly plumb. Sections of various heights shall be used in order to bring the top on the manhole ring and cover to the elevation shown on the Drawings. The precast concrete manhole rings shall be joined with Portland cement mortar of a minim thickness of ½ inch. Mortar shall be composed of one part Portland cement to two parts clean, well-graded sand of such size that 100 percent will pass through a No. 8 sieve. Cement, aggregate, and water for mortar shall conform to the applicable requirements of this Section. The manholes sections shall be placed with the tongue end downward.

6. Projecting ends of the sewer and pipe stubs shall be adequately supported to prevent displacement from line or grade during construction.

7. Manhole invert shall be shaped as indicated on the plans to provide an adequate channel between the inlet and outlet pipes. The channel shall be provided by laying pipe through the manhole and breaking out the top half, except where there is a change in diameter or a junction. Whenever inlet and outlet pipe sized are different, the channel shall be shaped in a gradual transition between the openings.

8. Existing polyurethane or PVC manhole lining damaged during construction shall be repaired or replaced by the Contractor.

9. Watertight manhole frame and cover shall be provided in areas where ponding around the manhole may be possible.

10. A minimum of 24 hours of curing time is required for all manhole bases. No admixtures or accelerators shall be utilized without specific written permission from the CONSTRUCTION MANAGER and in no case shall such additives be allowed in lieu of 24 hours cure time.

11. Castings for frames and covers shall be of gray iron and shall conform in quality and type to Riverside (California) Foundry R-300, 300 pound cover. The bearing surfaces of the frames and covers shall be machined, and the cover shall seat firmly into the frame without rocking. The top of the cover shall have the letter “S” cast thereon. Before leaving the foundry, all castings shall be thoroughly cleaned and subjected to a hammer inspection, after which they shall be dipped twice in a preparation of asphalt or coat tar and oil, applied at a temperature of not less than 290 degrees or more than 310 degrees, in such a manner as to forma a firm and tenacious coating.

12. Whenever reasonably possible, sewers shall be brought into manholes without drops, steepening the incoming sewer instead. Drop manholes will be permitted only with approval from the City.

13. All interior surfaces of the new sewer manhole shall be applied with a Zebron or Sancon coating or an approved equal.


SP 33

306-1.2 Installation of Pipe

306-1.2.1 Bedding.

306-1.2.1 (A) General[Replace paragraph 4 with the following].

Densification of bedding materials shall not be allowed.

306-1.2.2 Pipe Laying[Add the followings paragraphs].

306-1.2.2.a Connections

A. Every new local sewer main collection system (project or subdivision) shall not be connected to the downstream live sewer until after final inspection and acceptance of the new upstream work.

B. Manhole Connection Fittings. An A-Lok Pipe Gasket or equal manhole connection fitting shall be cast into the base of manholes for all connections. The connection shall be watertight at the connection to the base. The nearest pipe joint shall be more than 2-feet outside of the manhole base. The invert channel in the manhole base shall be formed at the time the manhole base is constructed. No mortar will be allowed.

C. Connection to Existing Manholes. At the locations as shown on the Drawings, the Contractor shall connect to existing manhole structures and construct the new flow-through channels in each manhole base to accommodate the new sewer lines as required. Smooth transitions shall be installed from the inverts of the newly installed pipes to the existing manhole structures. Manholes shall be core drilled and manhole connection fittings shall be connected to the core drilled hole an A-Lok Pipe Gasket, or approved equal. The nearest pipe joint shall be more than 2-feet outside of the manhole base. Jack hammering shall not be allowed.

D. Future Connections to Structures. Drop manhole tees, concrete encased drop pipes, drop manhole one-fourth bends for all drop manholes, and all stub inlets that will be required for all proposed sewer extensions, as shown on the plans, shall be constructed as a part of the sewer structures required by the contract. The location, sizes, and elevations of these items shall be as shown on the details and plans.

306-1.2.2.b Avoidance Of Reverse Slope Or Ponding in Sewers


SP 34

There shall be no tolerance of reverse slope, as evidenced by ponding of flushing water in the pipeline during video inspection. Any such pipeline shall be removed upstream and downstream to the nearest adjacent sewer structure, unless otherwise approved by the CONSTRUCTION MANAGER, and shall be replaced at proper line and grade and retested. This process shall be repeated, if necessary, until no sags or ponding remain.

306-1.2.13 Installation of Plastic Pipe and Fittings.]Add the following to the end of the section].

Wrinkles, blistering, or any interior or exterior imperfections of PVC pipe shall be subject to rejection at the discretion of the City Inspector.

Vibration, tamping, or recompaction of pipe zone material to re-shape an out of tolerance deflected PVC pipe shall not be allowed. Any PVC pipe previously installed that is excavated for repair due to incorrect grade or for exceeding allowable deflection tolerances shall be removed from the jobsite and shall not be used for any City facility.

306-1.2.14 Sewer Laterals[Add the following paragraphs].

Location:

Whenever sewers are installed in new public streets or alleys, wyes shall be installed as part of the sewer work. Laterals shall be extended to the property line of abutting properties. Construct 4-inch house lateral with tee at property line and cleanout behind sidewalk per CITY OF EL CENTRO Standards. Lateral connection to wye on the main line shall utilize two 45-degree elbows to allow proper alignment of the lateral without overstressing the fittings.

Service Laterals:

Size and Grade: A four inch (4”) house connection is acceptable for one single-family residential lot provided a minimum grade of ¼” per foot (approximately 2%) can be maintained from the mainline sewer to the property line with a minimum depth of four feet (4’) below curb top. All service laterals in industrial subdivisions shall be six inch (6”) minimum size and shall terminate in a manhole on the main sewer line.

Sewer laterals shall be constructed on an unyielding foundation, with joints closely and accurately fitted, true to line, and on a straight grade from the bend joining the main sewer to their upper ends, unless otherwise indicated on the plans. Sewer laterals shall not be laid on a slope greater than 45 degrees from a horizontal line unless required or approved by the CONSTRUCTION MANAGER. Wyes for sewer laterals shall be installed as specified below. The sewer lateral lines shall be jointed to wyes by commercially manufactured bends. Bends are a part of the sewer lateral. Sewer laterals shall be installed on a uniform grade of not less than 1/4" per lineal foot as shown on the Standard Drawings and as follows:


SP 35

A. Where depth of main line sewer and sewer lateral slope of 1/4" per lineal foot will result in a sewer depth at the termination of the lateral of 5-1/2 feet or less, then 1/4" per lineal foot slope shall be used.

B. Where depth of main line sewer and sewer lateral slope of 1/4" per lineal foot will result in a sewer depth at the termination of the lateral of over 5-1/2 feet, the CONSTRUCTION MANAGER shall establish the slope of the lateral as follows:

1. Where properties can be properly serviced by a sewer depth at the termination of the lateral of 5-1/2 feet, the slope shall be increased to result in the 5-1/2 foot depth, or a deep cut sewer lateral or riser may be used.

2. Where properties slope away from the main line sewer such that a depth at the termination of the lateral of greater than 5-1/2 feet is required for proper service, the slope shall be laid to 1/4" per lineal foot or increased as required to service the property.

3. In all cases, the CONSTRUCTION MANAGER shall establish the required elevations at the termination of the sewer lateral. Where a deep cut sewer lateral line is to be connected to a sewer main, all bends leading away from the sewer main wye branch are a part of said deep cut sewer lateral. All sewer laterals shall be installed with a suitable stopper of the size of the lateral.

Commercially manufactured wyes shall be installed where indicated on the plans or at such locations required by the CONSTRUCTION MANAGER. All wye branches not to be joined to sewer laterals shall be installed with a suitable stopper of the size of the wye branch. The wye branches, unless otherwise specified, will be inclined upward at an angle not greater than 45 degrees from a horizontal line. The use of double wyes will not be permitted.

When it becomes necessary to connect a sewer lateral to a main line sewer at a point where no wye branch has been installed in the main line sewer, a tee saddle with collar shall be used. The saddle shall be installed by cutting or drilling a hole in the main line sewer pipe and fitting the saddle snugly in place. Saddles shall be placed in the top of the main line pipe with the branch upward at approximately forty-five (45) degrees from the horizontal. Installation shall be in accordance with manufacturer's recommendations. The pipe and saddle shall be entirely encased with 2,500 psi concrete at least six (6) inches thick for one-foot each side of the saddle. The Contractor shall use special care to prevent bits of tile, sand, dirt, or other foreign material from entering the main line.

Provide a minimum of 48 hours notification to City Inspector and arrange for acceptable inspection time for all lateral connection excavations. Damage to sewer laterals during excavation for connection to building plumbing requires: notification to City Inspector;


SP 36

repair; TV Inspection; and successful air pressure test of line segment to which it is connected.

Cleanouts:

Cleanouts shall be provided on all building laterals at each bend exceeding 45-degrees and at an interval not greater than one hundred feet (100’). Cleanouts shall also be located two feet from building and at the property line. A Standard Cleanout S-8 shall be provided on each lateral at the property line to allow closed circuit television inspection of the lateral.

One or two foot standard lengths of pipe shall be used for inlet and outlet connection to the manhole assemblies.

306-1.3 Backfill and Densification

306-1.3.1 General[Add a new paragraph to the end of the section].

Plastic warning tape shall be installed 3 feet above the top of the pipe longitudinally and shall be continuous in its coverage on the piping. The tape shall be 3-inches wide, 3 mil in thickness, green in color and marked “Caution Sewer Below”.

306-1.3.3 Water-Densified Backfill. [Replace with the following].

Water densification of backfill shall not be allowed under any conditions.

306-1.4 Testing Pipelines

306-1.4.1 General[Replace with the following].

Pipeline testing for sewers within the City of El Centro shall consist of the following tests, which are described, in detail below:

CCTV Inspection Test (mandatory)Air Pressure Test (mandatory)Deflection Test (PVC Pipe only) (mandatory)Manhole Negative Air Pressure Test After Backfill (Vacuum Test - mandatory)Water Infiltration Test (discretionary)

The Contractor at the Contractor’s expense, including all materials, equipment and labor shall perform these tests. All tests shall be performed in the presence of the City Inspector or CONSTRUCTION MANAGER. All sewer pipes and forcemains shall be cleaned prior to testing using a Mandrel.City of El CentroEighth Street and Fairfield Drive Sewer Rehabilitation Project

SP 37

Testing shall proceed after compaction is complete and utilities are in-place, but prior to placing of permanent resurfacing. The tests shall include the main and laterals as a unit. All pipes are to be cleaned and empty at the time of testing.

When the facilities installed exceed the limits allowed by each test, the Contractor shall, at the Contractor’s expense including materials, equipment and labor, locate the defects and make the necessary repairs or replacements in accordance with the Specifications to reduce the leakage or infiltration to within the specified limits. Any individually detectable leaks shall be repaired, regardless of the results of the tests.

[Add the following new subsection].

306-1.4.7 Manhole Negative Air Pressure Test (Vacuum Test)

Manhole Negative Air Pressure Test (Vacuum Test). Vacuum testing shall be done in accordance with ASTM C 1244, latest edition. Each manhole shall be tested immediately after assembly and prior to backfilling to pull all manhole precast concrete segments together and to repair all vacuum leaks. Each manhole shall be tested a second time for final acceptance after backfill in order to assure that the backfill operation did not damage the integrity of the vacuum seal. Any manholes damaged or moved during final grading or paving shall be retested, excavated if failed, repaired if necessary, and retested until passing.

All lift holes shall be plugged with an approved non-shrink grout. No grout will be placed in the horizontal joints before testing. All pipes entering the manhole shall be plugged, taking care to securely brace the plugs form being drawn into the manhole.

The test head shall be placed at the inside of the top of the cone section and the sealed manhole shall be evacuated in accordance with the manufacturer's recommendations. A vacuum of ten inches (10") of mercury shall be drawn and the vacuum pump shut off. With the valves closed, the time shall be measured for the vacuum to drop to nine inches (9"). The manhole shall pass if the time is greater than 60 seconds for a 48" diameter manhole, and 75 seconds for a 60" manhole.

If the manhole fails the initial test, necessary repairs shall be made with a non-shrink grout while the vacuum is still being drawn. Cracks longer than two-inches shall be cause for rejection of the casting and no patching shall be allowed. Retesting shall proceed until a satisfactory test is obtained.

The Contractor shall protect all existing facilities during the planning operation and repair or replace any damage facilities. These existing facilities shall include but not be limited to:


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A. Concrete curbs, gutters, driveways and sidewalks.B. Roadside signs.C. Trees and shrubs adjacent to the Work area.D. Utility lines, vaults, manholes, valves and signal detector loops.


306-1.4.8 Closed Circuit Televised Video Survey

This subsection covers the furnishing all materials and equipment and performing all operations necessary to produce video taping closed circuit television inspection for sewer mains and for lateral connections on existing sewer mains.

EquipmentTelevising equipment shall include the television camera, television monitor, cables, power source, lights and other equipment necessary to the televising operation. The camera, television monitor and other components of the video system shall be capable of producing a minimum 350 line resolution color video picture.

Television CameraThe camera shall be specifically designed and constructed for operation in connection with sewer inspection. The camera shall be operative in one hundred percent (100%) humidity conditions and shall be capable of viewing ninety percent (90%) to the axis to be inspected so that service connections can be properly inspected. Focal distance shall be adjustable through a range of from one inch to infinity. The camera shall be mounted on skids or tracks suitably sized for each pipe diameter to be investigated. A depth gauge shall be affixed to the camera unit in such a manner that depth of flow or ponding can be accurately measured in increments of 0.25 feet from 0.0 to 0.15 feet.

LightingLighting for camera shall minimize reflective glare. Camera and lighting quality shall be suitable to provide a clear, continuously in-focus picture of the entire inside periphery of the sewer pipe for all conditions encountered during the work.

Remote Footage CounterThe remote footage counter shall be accurate to two-tenths of a foot (2/10’) over the length of the particular section being inspected and shall be mounted over the televison monitor.

VideotapesThe video tapes shall be high quality color in WHS format and recorded in either SP or LP modes. Any out of focus video recordings, or portions thereof, shall be cause for rejection of the video recording and will necessitate re-televising.

InstallationCity of El CentroEighth Street and Fairfield Drive Sewer Rehabilitation Project

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General Requirements

The CONSTRUCTION MANAGER shall be present during the entire televised inspection process. After taping, the Contractor shall turn over the original VHS video tape to the inspector with the tab removed to prevent accidental erasure.

The lines shall be televised after completion of trench backfill and finished grading but prior to placement of pavement, unless otherwise approved by the CONSTRUCTION MANAGER.

The Contractor shall be responsible for the preparation of the sewer before televising. If the flow is such that bypassing of the sewage is required, the Contractor shall make appropriate arrangements with the City to bypass the sewage flow. The Contractor shall perform the bypass operation or secure a Subcontractor to perform the bypass operation under City supervision.

Execution

Televising shall be done one section at a time: each section isolated from the remainder of the sewer line as required. Sufficient water shall be supplied to cause drainage within the isolated section prior to televising.

The camera shall be moved through the line in either direction at a uniform rate, stopping when necessary to ensure proper documentation of the condition of the sewer line but in no case shall the television camera be pulled at speed greater than 30 feet per minute. Manual winches, power winches, TV cable and powered rewinds or other devices that do not obstruct the camera view or interfere with proper documentation of the sewer line conditions shall be used to move the camera through the sewer line.

If, during the televising operations, the television camera will not pass through an entire manhole section, the Contractor shall re-set his equipment in a manner so that the inspection can continue opposite the obstruction. If the television camera encounters an obstruction within a section not accessible to a manhole, the Contractor shall remove the obstruction by excavation or other appropriate means, replace whatever pipe is necessary, and re-televise the entire section.

Whenever non-remote powered and controlled winches are used to pull the television camera through the line, telephones, radios, or other suitable means of communication shall be set up between the two (2) manholes of the section being inspected to ensure that adequate communications exist between members of the crew.

The importance of accurate distance measurements is emphasized. Measurement for location of defects shall be above ground by means of a meter for depth of manhole, will not be acceptable.


SP 40

The accuracy of the measurement meters shall be checked daily by use of a walking meter, roll-a-tape, or other suitable device. Footage measurements shall begin at the center line of the upstream manhole, unless permission is given to do otherwise. Footage shall be shown on the video data view at all times.

Documentation

Audio and written documentation shall accompany all videotapes.

Labels

The tapes and the tape container shall have printed labels containing the report number, tape number, date of TV inspection, location, upstream and downstream manhole or station numbers.

Audio

The audio portion of the tape shall include date of inspection, description of the pipe size, type and pipe joint length, upstream and downstream manhole or station numbers, description and location of each defect, including cracked pipe, protruding service taps, off set joints, collapsed sections, presence of scale, corrosion and roots.

Written Documentation

A written report is required which shall include: date of inspection, tape number, location, size, type and length of pipe, direction of flow, beginning and end tape counter numbers, sketch showing street and cross streets where the TV inspection was made, description and location of each defect, such as misalignment, offset joints, protruding service connections, cracked pipe, and split pipe.


306-9 Sewer Flow Control

The following Subsection includes control of irrigation, drainage, and sanitary sewer flow during by-pass operations required for sewerline construction

306-9.1 Contractor shall provide the following as a minimum for all by-pass operations.

A. Coordinate bypass operations with the City 3 days prior to commencement of work.

B. Provide temporary pumps, conduits, and other equipment to bypass sewer flow.City of El CentroEighth Street and Fairfield Drive Sewer Rehabilitation Project

SP 41

1. Equip engines with mufflers and/or enclose to keep noise level less than 50 decibels, or 10 decibels above ambient noise levels when measured at building closest to noise source.

2. Provide pumps and bypass lines of adequate capacity and size to handle flows.

C. Maintain sufficient equipment and materials on site to ensure continuous and successful operation of bypass and dewatering systems.

1. Keep standby pumps fueled and operational at all times.

2. Maintain on site sufficient number of valves, tees, elbows, connections, tools, sewer plugs, piping, and other parts or system hardware to ensure immediate repair or modification of any part of system as necessary.

D. Provide piping, joints and accessories designed to withstand at least twice the maximum system pressure, or 50 psi (345 kPa), whichever is greater.

E. Continuously monitor pumps and lines during entire period of flow bypass.

306-9.2 Submit Drawings and complete design data showing methods and equipment to be utilized in sewer bypassing and dewatering to Project Engineer. Include the following information:

A. Indicate location of temporary plugs and bypass discharge lines on Drawings.

B. Capacities of pumps, prime movers, and standby equipment.

C. Standby power source.

D. Traffic control plan.

306-9.3 In areas where sewer flows are bypassed, discharge bypass flow to sanitary sewer approved by the City. No bypassing to ground surface, receiving waters, storm drains, or bypassing which results in groundwater contamination or potential health hazards shall be permitted.. In the event sewage accidentally drains into drainage system or street, immediately stop overflow, notify the City, and take necessary action to clean up and disinfect spillage to satisfaction of Project Engineer.


306-10 DEWATERING

The following subsection includes control and disposal of storm water runoff; lowering the water table and intercepting seepage which would otherwise emerge from the slopes or bottoms of excavations; increasing the stability of excavated slopes; preventing loss of material from beneath the slopes or bottoms of excavations; reducing lateral loads on sheeting and bracing; improving the excavating and hauling City of El CentroEighth Street and Fairfield Drive Sewer Rehabilitation Project

SP 42

characteristics of sandy soil; preventing rupture or heaving of the bottom of an excavation; disposing of pumped water; and protection and restoration of adjacent structures, including repair of any settlement-related damage. Dewatering will not be measured separately for payment, and all costs in connection therewith will be considered incidental to the excavation to which the dewatering work pertains.

306-10.1 Design Criteria

A. The Contractor shall be responsible for the design and adequacy of the dewatering system.Design the dewatering systems to perform as follows:

1. Effectively reduce the hydrostatic pressure and lower the groundwater levels belowthe excavation;

2. Develop a substantially dry and stable sub grade for prosecution of constructionoperations;

3. Prevent damage to adjacent properties, buildings, structures, utilities, and other workas a result of settlement or other groundwater-related effects; and

4. Assure that, after 12 hours of initial pumping, no soil particles will be present in thedischarge.

B. Methods of dewatering may include sump pumping, single or multiple stage well pointsystems, eductor and ejector type systems, deep wells, and combinations thereof.

C. Locate dewatering facilities where they will not interfere with utilities and construction workto be performed by others.

D. Modify dewatering procedures that cause, or threaten to cause, excessive ground movementor damage to new or existing facilities, so as to prevent further ground movement damage.

E. Wherever possible, groundwater shall be discharged into a nearby, existing storm sewerageor drainage system.

306-10.2 Permits


SP 43

A. The Contractor shall obtain all special permits and licensing for dewatering and disposal ofpumped water as required to construct and complete the Work.

306-10.3 Submittals

A. Prior to installation of the dewatering system, submit Shop Drawings and design data,indicating the following:

1. The proposed type of dewatering system;

2. Arrangement, location, and depths of system components;

3. Complete description of equipment and instrumentation to be used, with installation,operation, and maintenance procedures;

4. Types and sizes of filters;

5. Design calculations demonstrating adequacy of the proposed system and equipment.The Contractor shall perform site-specific field testing to determine soil permeabilitiesto be used for design of the dewatering system; and

6. Methods of disposal of pumped water.

B. Submit copies of the special permits required for performing the work of this Section.

306-10.4 Regulatory Requirements

A. Comply with the California Code of Regulations, Title 8, Chapter 4, Subchapter 4 —Construction Safety Orders.

B. Methods of groundwater discharge, conveying, and transmission to off-site locations shallmeet with the approval of the governmental authorities having jurisdiction.

306-10.5 Site Conditions

A. Surface Drainage: Intercept and divert precipitation and surface water away fromexcavations through the use of dikes, curb walls, ditches, pipes, sumps, or other means.


SP 44

B. Drainage of Excavated Areas:1. Provide and maintain ditches of adequate size to collect surface and seepage waterwhich may enter the excavations. Divert the water into sumps and drain or pump intodrainage channels or storm drains or sewers, subject to the approval of jurisdictionalauthorities.

2. When water is to be diverted into a storm drain, provide settling basins or otherapproved facilities as required to reduce the amount of fine particles which may becarried into the drain. If a storm drain becomes blocked or its capacity restricted dueto dewatering operations, make arrangements with the jurisdictional authority, andclean the drain.

306-10.6 Materials and Equipment

A. The Contractor shall furnish all materials, tools, equipment, facilities, and services asrequired for providing the necessary dewatering work and facilities. Provide back-upequipment as necessary for replacement and for unanticipated emergencies.

B. Provide piezometers for monitoring groundwater levels and other instruments and measuringdevices as required.

306-10.7 Detection of Movement

A. For each existing structure that may be affected by the work, install settlement markers oneach footing, building corners, wall or surrounding structures to be monitored. Settlementmarkers shall be capable of being read to an accuracy of 0.005 foot.

B. Take and record readings not less than once per week during performance of the dewateringwork until the permanent structure is complete to the ground level.

C. Stop work; notify the Engineer, and take immediate remedial action if movement of theexisting structure occurs during performance of the work.


SP 45

D. Upon completion of the dewatering work, take weekly readings of the measurement points for a period of 4 weeks, or longer if movement persists, and report the results to theEngineer.

E. The detection of movement shall be performed by a qualified licensed civil engineer or landsurveyor.

306-10.8 Dewatering

A. Perform dewatering in accordance with approved Shop Drawings. Keep the Engineeradvised of any changes made to accommodate field conditions and, on completion of thedewatering system installation, revise and resubmit Shop Drawings as necessary to indicatethe installed configuration.

B. Organize dewatering operations to lower the groundwater level in excavations as requiredfor prosecution of the work, and to provide a stable, dry sub grade for the prosecution ofconstruction operations. Prior to placement of concrete, the sub grade shall be in a firm,well-drained condition, and of adequate and uniform load-bearing nature to supportconstruction personnel, construction materials, construction equipment, and steel reinforcingmats without tracking, rutting, heaving, or settlement. All weak, soft, saturated, or otherwiseunsuitable material shall be removed and replaced with approved backfill.

C. Maintain water level at lower elevations, so that no danger to structures can occur because ofbuildup of excessive hydrostatic pressure, and provide for maintaining the water level aminimum of 2 feet below the sub grade.

D. Additional temporary lowering of the water table may be required to provide suitable soilconditions for the preparation of sub grades for footings and foundations. This may beaccomplished by increased pumping from wells, installation of trench drains and sumps, orother appropriate methods.

E. The extent of dewatering may be reduced for structures designed to withstand hydrostaticuplift pressure, provided such water level does not result in uplift pressures in excess of 80percent of the downward pressure produced by the weight of the structure and backfill inCity of El CentroEighth Street and Fairfield Drive Sewer Rehabilitation Project

SP 46

place. The extent of de-watering will be determined by the Contractor based on piezometerreadings.

F. Maintain groundwater level a minimum of 2 feet below the prevailing level of backfill being placed.

G. The extent of dewatering for structures with a perforated undertrack drainage system may be reduced in the same manner as for units designed to withstand hydrostatic uplift pressure,provided means of draining the affected portion of the main track drainage systems,including adequate standby equipment, are furnished, installed, and removed, as required.

306-10.9 Records

A. Observe and record the average flow rate and time of operation of each pump used in thedewatering system. Where necessary, provide appropriate devices, such as flow meters, forobserving the flow rates. Submit flow-rate data during the period that the dewatering systemis in operation.B. Observe and record the elevation of the groundwater during the period that the dewateringsystem is in operation. Submit observation records within 24 hours of reading, on a regularbasis.C. During initial period of dewatering, make required observations on a daily basis. If, after aperiod, dewatering operations have stabilized, reduce observations to longer intervals asappropriate.D. Submit water quality test results on a periodic basis as required by the jurisdictionalauthority.

306-10.10 Restoration

A. Restore existing structures to conditions equivalent to those existing prior to the start ofwork, including repair of any settlement-related damage.


SP 47

SECTION 310PAINTING

310-5 PAINTING VARIOUS SURFACES

310-5.6 Painting Traffic Striping, Pavement Markings, and Curb Markings

[Delete Subsection in total and substitute with the following].

All final street striping, pavement markers and signage shall be installed by AGENCY forces. The Contractor shall coordinate with the AGENCY’s Traffic Signs and Markings Maintenance section, at (714) 536-5428 a minimum of four working days prior to final pavement surfacing or patching to arrange for restriping of street.

Payment for coordination shall be included in the contract unit bid prices of related items of work.

Removal of Traffic Stripes, Pavement Markings, and Raised Pavement Markers:

Traffic stripes shall be removed before any change is made in the traffic pattern, and before painting new stripes, markings, and installing new RPMs.

Traffic stripes, pavement markings and raised pavement markers shall be removed to the fullest extent possible from the pavement by any method that does not damage the surface or texture of the pavement. Sand or other material deposited on the pavement or sidewalk as a result of removing traffic stripes and markings shall be removed as the work progresses. Accumulations of sand or other material that might interfere with drainage or might constitute a hazard to traffic will not be permitted.

Where sandblasting is used for the removal of traffic stripes and pavement markings or for removal of objectionable material, and such removal operation is being performed within ten feet of the traveled way, the residue, including dust, shall be removed immediately after contact between the sand and the surface being treated. Such removal shall be by a vacuum attachment operating concurrently with the blast cleaning operations. Pavement surface shall be "Fog-Sealed" after striping removal.

Grinding shall not be permitted.

Contractor will not be required to use a vacuum attachment under the following conditions

1. When approved by Agency.


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2. When the blasting sand will be confined by mechanical means to a small area.

3. When a sweeper (preferably a vacuum type) will immediately follow the blasting operation or when traffic can be safely routed around the sand until it is swept up.

Temporary Striping, Signing, Raised Pavement Markers:

The Contractor shall be responsible for the placement of all required temporary signing, striping, and markings and the removal of existing stripes and markings in the installation of required temporary striping.

Traffic striping and markings shall be removed before any change is made in the traffic pattern. Removal shall be coordinated with the installation of new pavement markings to provide continuous, nonconflicting guidance to public traffic.

Should temporary striping be required on the finished asphalt surface, the method and configuration must be approved by the City Traffic Engineer for approval prior to placement.

Temporary centerline or median stripes for traffic control shall be placed at the completion of each days work to provide for night delineation for traffic separation.

At no time shall the street be open to traffic without delineation to separate opposing traffic. Temporary delineation type shall be at the inspector's discretion.

In general, temporary reflectorized markers are the preferred type of temporary delineation.

Pavement Delineations Standards

All pavement delineations shall conform to the standards of applicable portions of the latest MUTCD, Caltrans Standard Plans A20A-C and A24A-D, and the City of El Centro Standard Plans.


SP 49

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