4-Exhibit G Technical Requirements.pdf

TECHNICAL REQUIREMENTS TR-1

EXHIBIT G

TECHNICAL REQUIREMENTS

PART I: GENERAL

1. SCOPE. The Work covered by this section consists of mobilization and demobilization, site preparation and restoration, furnishing all plant, labor, equipment, supplies, and material, and of performing all operations in connection with the construction of two (2) breakwaters, three

(3) breakwaters with stems, and one (1) spur groin along the barrier beach of Pine Island, as described by applicable permits, and/or as specified herein.

2. CONTRACTOR'S DUTIES.

2.1. Except as specifically noted, the CONTRACTOR shall provide and pay for:

• Labor, material, and equipment;

• Tools, Construction equipment, and machinery;

• Geotechnical sampling and tests;

• Surveys;

• Beach access maintenance, improvements, restoration, and mitigation;

• Necessary utilities, such as water supply, electrical power, telephones, road, fences, and sanitary facilities, including maintenance thereof;

• Safety requirements including beach and/or disposal site security, flagmen and signage;

• Other facilities and services necessary for the safe and proper execution and completion of the Work.

2.2. Perform all Work described in these Technical Requirements except where specifically indicated to be done by others (i.e., a beach renourishment project is being constructed by a separate Contractor prior to the works described herein).

2.3. Pay legally required sales, consumer, and use taxes.

2.4. Secure and pay for legally required permits, licenses, and government fees, including insurance and Bonds required by any permits.

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2.5. Give required notices.

2.6. Employ workpeople with sufficient knowledge, skill, and experience to perform the Work assigned to them.

2.7. Comply with the codes, load limits, laws, ordinances, rules, permits, regulations, orders, and other legal requirements of public authorities bearing on the conduct of the Work.

2.8. Submit written notice to Engineer of observed variance of Contract Documents from legal requirements. Any necessary changes will be adjusted as provided in the Contract for changes in the Work.

2.9. Enforce discipline and good order among CONTRACTOR and Subcontractor employees.

Any person employed by CONTRACTOR or Subcontractors who does not perform their work in a skillful manner, is incompetent, or acts in a disorderly or intemperate manner shall, at the written request of Owner, be removed from the Project immediately and shall not be employed again in any portion of the Work without the approval of Owner.

2.10. Always provide facilities for access and inspection of the Work by representatives of

Owner and of such governmental agencies designated by Owner as having the right to inspect the Work.

2.11. Cooperate with other CONTRACTORs who may be performing work for Owner, and with Owner's employees working in the vicinity of the Work done under this Contract.

2.12. Provide for the safety of the public utilizing the beach for purposes of recreation during the period of Work.

3. PERMITS, PLAN APPROVAL, AND LICENSES

3.1. The Contractor shall comply with all requirements under the terms and conditions set out in all Permits applicable to the Work (Exhibit XX). Specifically, the Contractor shall familiarize themself with the general and special conditions of South Carolina Department of Environmental Services (SCDES) and U.S. Army Corps of Engineers (USACE) Permits and their attachments, including the U.S. Fish and Wildlife Service and National Marine Fisheries Service Biological Opinions (BOs), and other approvals for the project, as well as all applicable provisions of the Corps of Engineers Manual, TECHNICAL REQUIREMENTS TR-3

EM 385-1-1, entitled "Safety and Health Requirements Manual", in effect on the date of solicitation.

3.2. CONTRACTOR will be given copies of all approvals and permits and shall be obligated to observe all conditions of the approvals and permits as issued. The CONTRACTOR shall furnish Bonds and insurance at their own cost. The CONTRACTOR will be liable for any fines or penalties levied as a result of their failure to comply with the terms of any and all permits required to construct the Project or as a result of failure to comply with any federal, state or local law, ordinance, or regulation.

4. CONTRACTOR'S USE OF PREMISES

4.1. Confine work operations to areas permitted by law, ordinances, permits, easements and the Contract Documents.

4.2. Do not load or permit any part of a structure to be subjected to any force that will endanger its safety.

4.3. Comply with and enforce Owner's instructions regarding signs, noise, advertisements, fires, and smoke.

4.4. Assume responsibility for protection and safekeeping of material stored on premises.

4.5. Do not discharge smoke, dust, or other contaminants into the atmosphere, or fluids or material into any waterway as will violate regulations of any legally constituted authority.

4.6. As directed by Owner, move stored or stockpiled materials which interfere with the operations of Owner or upland property owners.

4.7. Take appropriate measures and precautions to protect the safety of the public utilizing the beach from construction activities, as well as residents and guests recreating along the shoreline within the limits of construction.

4.8. Obtain and pay for additional storage, access, or work areas needed for operations (if required).

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5. CONSTRUCTION EQUIPMENT, ACCESS AND STAGING

5.1. Access from land, staging, and storage for construction equipment is available only at the following location:

Dolphin Head Recreation Area, 90-198 Dolphin Head Lane in Hilton Head Plantation (inside gated community).

Access for Owner shall be maintained throughout construction.

5.2. Permissible Work Days And Hours. The CONTRACTOR shall coordinate with the Town on the use of the access and staging area. Construction activities on the beach may occur from Monday through Friday from 7:00 AM to sunset, and on Saturdays from 8:00 AM to 5:00 PM, unless otherwise authorized by the TOWN. Material deliveries shall only occur Monday through Friday from 8:00am to 5:00pm. No work shall occur on Sundays and Holidays. Lighting of the work site is prohibited except as may be specifically authorized in writing by the TOWN. Delivery of materials or equipment through Hilton Head Plantation to the work site shall be limited to Monday through Friday from 7:00AM to 6:00PM.

5.3. Work Area. The work area is an intertidal beach subject to flooding every tidal cycle.

Hence access to a portion of the work site from the upland is limited daily. Work which occurs on water requires special access provisions or techniques which shall be in accordance with the CONTRACTOR’s stated Work Plan.

5.4. Work Site Conditions. Due to unstable soil conditions across the project site, the

CONTRACTOR should be prepared to protect the work and equipment using crane mats or other stabilizing applications. The CONTRACTOR may be required to incorporate ancillary methods of temporary stabilization to facilitate equipment access to the structures such as mats, landing mattresses, etc. The stone filled marine mattresses shall not be used for equipment access or equipment material storage. All forms of stabilization must be agreed upon by the TOWN and remediated or restored prior to completion and acceptance of the work.

5.5. Work by others. The project Work will immediately follow the hydraulic placement of beach fill by another CONTRACTOR (as noted in Technical Requirements Section 2.2).

The resultant fill site will constitute existing conditions for the nearshore rock structure construction addressed herein. The project plans provide an estimate (only) of existing

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site conditions, but cannot ensure the exact dimensions, elevations, slopes, and overall condition of the dry beach and nearshore area at the initiation of construction. The CONTRACTOR should be aware that the site conditions following hydraulic fill placement are subject to rapid change due to waves, currents, storms, and other naturally occurring phenomena at this location.

6. SUBMITTALS and NOTIFICATIONS

6.1. The CONTRACTOR shall provide the following list of submittals and notifications to the Town and Engineer in accordance with the timeframes specified in the Contract Documents.

6.2. Construction Schedule and Work Plan. The CONTRACTOR shall submit to the TOWN and ENGINEER for approval at least 15 days prior to the initiation of work, a construction schedule and methodology statement for the Work. No Work on site shall begin until the schedule is approved by the TOWN. At a minimum, the schedule and plan should include the following:

Mobilization / demobilization Proposed dates for project commencement and completion Schedule and methods for delivery of construction materials to the project area Intended routes for transporting materials to the project area Intended storage and staging area Barge mooring areas and anchoring plan Plan for accessing the Work site Restoration of work areas including the construction and staging access area

6.3. Project Baseline and Control Discrepancies. The CONTRACTOR shall notify the Engineer of any discrepancies found during the survey of the Project baseline and control.

6.4. Material and Equipment Transport, Storage, and Access. The CONTRACTOR shall submit to the Engineer for approval at least 15 days prior to the initiation of work, a description of the routes and areas intended to be used to transport and store material and equipment during construction. The description shall also describe how the CONTRACTOR intends to access the project site and work areas. All transport routes, storage areas, access areas and facilities are subject to the approval of the TOWN and ENGINEER. Issues of post-construction restoration or remediation must be addressed.

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6.5. Contact List. The CONTRACTOR shall submit to the TOWN and ENGINEER at least 15 days prior to initiation of work a typed list of pertinent project personnel and their telephone, email address and other numbers by which key personnel can be reached for purposes of notification and other matters discussed in these Specifications. Should a subcontractor perform any element of the work, the CONTRACTOR shall provide a contact person or person(s) directly employed by the CONTRACTOR who shall be the TOWN’s point of contact and who shall be in responsible charge of the subcontractor during the duration of the work.

6.6. List of Subcontractors. CONTRACTOR shall submit to the TOWN and ENGINEER at least 15 days prior to the initiation of work a list that includes the name and physical address of each Subcontractor and vendor and a description of the work or products to be provided by each entity. All Subcontractors and vendors shall be acceptable to the

TOWN.

6.7. Armor and Chinking Stone Certification. CONTRACTOR shall submit to the TOWN and ENGINEER for approval at least 30 days prior to the shipment of stone material to the project site the stone certification and information regarding the stone source with the name, location and telephone number of the vendor(s) and quarry(s) from which stone materials will be provided. The stone certification shall be based upon an independent laboratory analysis of the rock's specific gravity and shall indicate the standards by which the results were developed. Certifications are required for the armor stone, chinking stone, and rock fill specified for mattress construction.

6.8. Marine Mattress. The CONTRACTOR shall furnish the ENGINEER, a manufacturer's certificate or affidavit signed by a legally authorized official from the company manufacturing the mattresses, that all materials contained within that shipment meet the composition, physical, and manufacturing requirements stated in this specification.

Certificate of compliance shall be submitted for the mattresses and geogrid/fabric composite underlayment prior to delivery to the work site

6.9. Marine Mattress Manufacturer’s Instructions. CONTRACTOR shall provide to the ENGINEER the most current copy of marine mattress manufacturer's recommendations for fabrication, backing with geotextile, filling, installation, repair of the marine mattresses and approved material for storage/stacking of completed units.

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6.10. Marine Mattress Work Plan. The CONTRACTOR shall submit for approval of the ENGINEER a plan for fabricating and filling the marine mattresses. Equipment, labor, materials, and methods shall be detailed for this task.

6.11. Marine Mattress Stone Fill Certification. The CONTRACTOR shall submit a certified sieve curve for the stone proposed for filling the marine mattresses.

6.12. Geogrid/Fabric Composite. The CONTRACTOR, or the SUPPLIER as their agent shall submit the following to the TOWN and ENGINEER for approval prior to purchase of geogrid/fabric composite:

6.12.1. product samples of the geogrid/fabric composite

6.12.2. a product data sheet and certification from the manufacturer that the geogrid/fabric composite product meets the requirements of these Specifications. A copy of all test results performed by the CONTRACTOR or their supplier which are necessary to assure compliance with the Specifications shall also be furnished to the ENGINEER. The CONTRACTOR shall cooperate with the ENGINEER when the ENGINEER requests to randomly sample the stock geosynthetic materials for testing purposes. Acceptance of furnished material will be based on the Certificate of Compliance, accompanying test reports, and visual inspection by the

ENGINEER.

6.13. Pre-Construction and Post- Construction Surveys. The CONTRACTOR shall submit pre-construction and post-construction survey data to the ENGINEER (See Technical Requirements Section 8.0).

6.14. Daily Quality Control Reports. The CONTRACTOR shall prepare and provide to the office of the ENGINEER by e-mail in PDF format each day a daily quality control report of the progress of the Work as specified in Technical Requirements Section 29.0.

6.15. Progress Reports. Between the time the Notice to Proceed is issued and authorization is given to mobilize to the project site, the CONTRACTOR shall only submit weekly progress reports. The CONTRACTOR shall notify the ENGINEER and TOWN at least three (3) days in advance of the mobilization of equipment and/or materials to the project site. Once the CONTRACTOR is mobilized to the work site, the CONTRACTOR shall submit daily reports that summarize the work completed at the end of each work day. Daily Reports shall be submitted every working day during the

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construction period (even when no work is done) between the time at which the CONTRACTOR is mobilized at the work site and the time of Final Acceptance.

Reports shall be submitted by 10:00 a.m. the following day to the ENGINEER via e-mail. The CONTRACTOR shall coordinate with the ENGINEER to formulate an acceptable form format for the daily report.

6.16. Vibration Monitoring and Control Plan. The CONTRACTOR shall submit to the

Engineer and the Town for approval a Vibration Monitoring and Control Plan.

6.17. Vibration Monitoring Report & Daily Logs. The CONTRACTOR shall submit to the

Town and the Engineer every two (2) weeks a compilation of the daily vibration monitoring logs and data.

6.18. Certified Rock Quantity. The CONTRACTOR shall provide records of the net weight of rock transported to the work site, as described under "MEASUREMENT AND PAYMENT", (see Technical Requirements Section 30.0). The CONTRACTOR shall provide the ENGINEER with a weekly cumulative total of all stone delivered to the project site and a total of all rock placed. Signed weigh tickets shall be provided to the ENGINEER weekly and summarized with each pay request. There shall be no exceptions to this requirement for payment.

6.19. Other Submittals and Notifications. The Contract documents and respective Plans outlined above may require other submittals and notifications.

6.20. As-Built Drawings. Upon completion of the project the CONTRACTOR shall submit as-built drawings (See AS-BUILT DRAWINGS, Technical Requirements Section 7.0).

6.21. Close-out Submittals. See Technical Requirements Section 16.2.

7. AS-BUILT DRAWINGS

7.1. The CONTRACTOR shall submit to the ENGINEER, for approval, professionally signed and sealed surveyed profiles and plan views of the Work, for the approval of the ENGINEER within 15 calendar days of the completion of the site work.

7.2. The profile data shall be measured and depicted as described in the paragraph "SURVEY REQUIREMENTS", Technical Requirements Section 8.0.

7.3. The plan view shall depict the location and extent of the marine mattresses, geogrid/fabric composite underlayment, and rock structures relative to identifiable

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fixed landmarks or monuments. The plan view shall be referenced to S.C. State Plane grid coordinates (as depicted in the Plans).

7.4. The TOWN reserves the right to withhold final payment until acceptable verifiable as-built drawings prepared, signed, and seal by a Profession Surveyor Licensed in the State of South Carolina have been submitted.

8. SURVEY REQUIREMENTS

8.1. The CONTRACTOR shall measure and submit to the ENGINEER plan and profile surveys of the structure depicting the following:

8.1.1. the natural and/or excavated grade in the immediate location of the structure that exists immediately prior to the placement of marine mattress and /or geogrid/fabric composite underlayment and stone material (i.e., pre-placement survey),

8.1.2. the theoretical location and extent of the marine mattresses and/or geogrid/fabric composite underlayment, and structure,

8.1.3. the final constructed configuration of the structure (i.e., post-placement survey).

8.2. The pre- and post-construction profile surveys shall be measured along transects that are perpendicular to the alignment of each structure and that are spaced no more than 20-ft apart along the structure. A profile along the crest of the structure shall likewise be required. A sufficient number of points shall be taken along each profile to accurately represent the general shape and average trend of the constructed lines and grades. The structure survey methods are subject to the approval of the ENGINEER. If the ENGINEER does not approve of the survey procedures, the CONTRACTOR shall modify their survey methods to the satisfaction of the ENGINEER at no additional cost to the TOWN. If any survey results do not meet the approval of the ENGINEER, the CONTRACTOR shall resurvey any deficient portion of a structure to meet the ENGINEER’S requirements at no additional cost to the TOWN.

8.3. The CONTRACTOR shall be responsible for maintaining the accurate alignment and configuration of the structure during construction. This may require daily surveys of the in-progress portions of the structure at no additional cost to the TOWN.

8.4. The CONTRACTOR shall submit all pre- and post-construction survey data to the Engineer in an electronic format acceptable to the ENGINEER prior to Final

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Acceptance. All survey data shall be submitted in graphical form with the pre-project conditions, theoretical structure template and allowable tolerances, and post-project conditions depicted. All survey information submitted and included in any depiction shall include the date of the survey. Vertical elevations shall be in feet referenced to NAVD88 datum. Horizontal distance shall be in feet. The date and identifying location (baseline station number) shall be clearly indicated for each profile. The nature of the grade shall be indicated along each profile (rock, limit of vegetation, sand, etc.)

8.5. The equipment, personnel and standards employed for these surveys shall comply with the requirements specified in the paragraphs "SURVEY LAYOUTS and CONTROL", below.

9. SURVEYS, LAYOUTS AND CONTROL

9.1. Horizontal control data and elevations for the Work are included in the Plans.

Descriptions of the monument control in the vicinity of the Work are also furnished in the Plans.

9.2. The CONTRACTOR shall establish the horizontal and vertical limits of the Work and the construction baseline using the tabulated and noted control provided in the Plans.

The CONTRACTOR shall not scale positions, distances, dimensions, elevation, slope, etc. from the Plans for the purposes of work layout. The CONTRACTOR shall be responsible for all measurements that may be required for the execution of the work to the location and limit marks prescribed in the Plans and in these Specifications. The ENGINEER reserves the right to modify the locations and elevations of the limit marks as may be required to meet changed conditions or as a result of necessary modifications to the work. A surveyor registered in the State of South Carolina shall be responsible for and certify all survey work.

9.3. If the CONTRACTOR elects to establish temporary benchmarks through the work site, they shall be established by a closed loop of levels from a permanent benchmark or a line of levels between two permanent benchmarks. Any such temporary benchmark shall be located upon fixed objects such as utilities, roadways, etc. to assure reliability through the duration of the work.

9.4. Construction Stakes. The CONTRACTOR shall furnish, at their own expense, such stakes, templates, platforms, equipment, tools and material, and all labor as may be required in laying out any part of the work from the monuments, control data and elevations. It shall be the responsibility of the CONTRACTOR to maintain and

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preserve the stakes and other marks established by the ENGINEER for the purposes of this work until authorized to remove them. If such marks are destroyed by the CONTRACTOR or through their negligence prior to their authorized removal, they may be replaced by the ENGINEER at their discretion, and the expense of replacement will be deducted from any amounts due or to become due. Work may be suspended at any time when location and limit marks established by the CONTRACTOR are not reasonably adequate to permit checking of the work.

10. TEMPORARY FACILITIES

10.1. Dune Overwalks and Beach Access Structures

10.1.1. Vehicular access structures shall be maintained in good condition or repaired with equivalent new material, as necessary, to return them to original condition or better.

10.1.2. Where shown or where field conditions dictate, temporary vehicular access structures constructed of suitable material shall be provided by the CONTRACTOR.

10.1.3. All new vehicular access improvements required for the construction of this Project must be removed in their entirety prior to Final Acceptance of the Work, unless otherwise agreed to by Town. The area affected by each vehicular access improvement must be restored to its original condition prior to Final Acceptance of the Work, unless otherwise similarly agreed to by the Town.

10.2. Sanitary Facility. The Contractor shall supply and maintain, at minimum, one (1) temporary sanitary facility for the use of land-based employees and Subcontractors.

The facility shall be conveniently located in the vicinity of the Work, but away from residential buildings along the coastline. The facility shall be removed at the end of the project.

11. DAMAGES. The CONTRACTOR, at the CONTRACTOR’s expense, shall repair all damages to private or public property resulting from the CONTRACTOR’s operations. Any damages to private or public property, including vegetation, resulting from the CONTRACTOR's operations shall be repaired by the CONTRACTOR at their expense. All existing dunes, landscaping, stairs, overwalks, walkways and other beach access structures shall be protected from impact by construction equipment. The Engineer shall determine if

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repairs are required, and the Engineer, Town, or owner of the damaged property will determine if the property has been satisfactorily repaired to its previous condition.

12. NIGHTTIME OPERATIONS. Nighttime is defined as the period of time from sunset to sunrise. The CONTRACTOR shall not be permitted to perform any nighttime work. There shall be no equipment or material delivery to the project site prior to 7:00 am.

13. NOISE CONTROL. All hauling, earthmoving, and excavating equipment, shall be equipped with satisfactory mufflers or other noise abatement devices. For the purposes of placing rock at the staging area, slamming of dump truck tailgates is not permitted. The CONTRACTOR shall conduct their operations so as to comply with all Federal, State, and local laws pertaining to noise. The use of horns, whistles, signals, and other noise devices shall be held to the minimum necessary to ensure as quiet an operation as possible while maintaining safety on the job site.

14. STRUCTURE INSPECTION AND VIBRATION MONITORING.

14.1. General. The CONTRACTOR shall implement a program to protect existing structures, including all walls, piers, and dune walkovers, from any damage resulting from construction equipment, construction equipment operations, vibrations, and sand placement, and to avoid potential claims that allege damages were caused by construction activities. This program shall be implemented for the duration of the entire project. The Contractor shall document immediate pre-project conditions of all structures, infrastructure, hardscape, and landscaping that have the potential to be damaged by construction operations and vibrations produced by construction activities. The Contractor’s related responsibilities include inspection, damage claims, and Work stoppage that results from monitoring.

14.2. The CONTRACTOR shall be responsible for determining and documenting the pre-construction conditions of existing structures within the Vibration Impact Distance (“VID”), monitoring construction activities, taking appropriate measures to prevent damage to any structures during construction, and performing a post-construction verification inspection of those structures previously inspected.

14.3. Work Stoppage. The Contractor shall be responsible for any costs associated with Work stoppage or changes in the Contractor’s means and methods that result from monitoring, inspection, and/or damage avoidance activities.

Gross, Ben Town please review.

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14.4. Vibration Control Plan. CONTRACTOR shall submit a list of structures deemed susceptible to vibration damage; number and location of monitors (seismographs) that will operate during construction; calibration data for monitors; list of methods to reduce ground vibrations to below the pre-determined maximum allowable vibration level for the susceptible structures; safe working distances from susceptible structures; maximum allowable ground vibration level that is permissible without causing threshold damage to each vibration sensitive structure; etc. Threshold damage is defined as the occurrence of cosmetic damage. Each seismograph shall have the capability to measure peak particle velocity and frequency and shall be equipped with an alarm system to alert the vibration control specialist (while on site and while away from the Work site) that ground vibrations are approaching the maximum tolerable ground vibration level.

14.5. Vibration Impact Distance (VID). The CONTRACTOR, through a qualified vibration control specialist, shall be responsible for determining the minimum distance from existing structures that vibration-producing equipment may safely operate without causing damage to the structures (i.e., VID). Only the CONTRACTOR’s construction equipment, which could create vibrations sufficient to damage structures, should be considered in this determination. For construction, the VID may change for different Work activities depending on the structural conditions as determined by the CONTRACTOR. Factors to be considered in setting the minimum safe distance and VID include, but are not limited to, the following: (1) local geology; (2) local foundation conditions; (3) structure foundation design; (4) structure condition including construction materials and existing stresses; and, (5) magnitude, frequency and duration of predicted vibrations. The CONTRACTOR and the vibration control specialist shall consider any other factors, in addition to those listed, which may affect the structures due to vibration.

The CONTRACTOR shall assume all responsibility for damages to existing structures within and bordering the project boundaries as a result of project activities.

14.6. Structure Inspection/Evaluation.

14.6.1. Pre-Construction. Any existing structures at a distance equal to or less than the

VID from any project Work area shall be inspected for existing damage prior to commencement of Work. Any damage found shall be documented thoroughly by photographs, video footage, and field notes and shall include description of damage, extent (i.e., size, length, crack width, etc.), location on structure, and any other pertinent information. The Contractor shall be responsible for developing appropriate procedures, as necessary, to prevent damage to existing structures. Pre-construction structure condition documentation shall include video and/or

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photographic documentation. Copies of the pre-construction structure condition video and/or photography, and other documentation, shall be provided to the Contract Administrator after the issuance of the Notice to Proceed and prior to the mobilization of equipment and crews that will be used for construction.

14.6.2. Post-Construction. After completion of Work, the Contractor shall be responsible for conducting a post-construction structural inspection/evaluation of structures previously inspected under the pre-construction structural inspection/evaluation. Documenting procedures shall be identical to those performed under the pre-construction inspection/evaluation. Any changes or deviations from the pre-construction conditions in any structure shall be identified and described clearly in the inspection documentation. The Contractor shall be responsible for remedying any damage resulting from construction activities to any structural features adjacent to the project. Copies of all documentation shall be provided to the Contract Administrator.

14.6.3. Pre- and Post-Construction Videos. The Contractor shall make pre- and post-construction videos of the project site and provide copies to the Contract Administrator. The videos will document the pre- and post-project conditions for both beach work and structural inspections from the initial construction start until final acceptance. One complete video shall be made of the entire project before the start of construction and one video shall be made of the completed project.

14.6.4. Qualifications for Structural Inspection/Evaluation. The Contractor shall provide personnel for structural inspections who meet at least the following minimum qualifications. Structural inspections and evaluations shall be performed by structural engineers registered in Florida with a minimum of 3 years of demonstrated experience in structural condition inspections. The Contractor shall provide documentation verifying the qualifications to the Contract Administrator for approval within two weeks after the date of Notice of Award and prior to issuance of Notice to Proceed. The Contract Administrator may reject any individual(s) not meeting the qualifications specified and request resubmittal of other personnel at no cost to the County. The Contractor shall immediately notify the Contract Administrator if any structural inspections personnel are replaced or removed from the project.

14.7. Vibration Monitoring. The Contractor shall be responsible for determining the allowable vibration level prior to the commencement of Work. The allowable vibration level is defined as the maximum level of vibration which does not cause or increase existing structural damage, either directly to the structure or indirectly through consolidation of the foundation material, which would result in settlement, or movement

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of structural features. The Contractor shall be responsible for implementing a Vibration Monitoring Plan, conducted by personnel meeting the qualifications outlined herein. The Vibration Control Specialist shall be responsible for vibration monitoring activities during all construction operations and shall have full authority over the vibration monitoring program to assist the Contractor in controlling construction-related vibrations.

Vibration levels shall be continuously monitored whenever vibration-producing equipment operates within a distance from any point on structures equal to or less than the VID. The Contractor shall immediately halt operation of vibration-producing equipment whenever a vibration monitoring station records a reading above the allowable vibration level. The Contractor is responsible for modifying Work methods, as necessary, to reduce vibrations upon resumption of Work.

14.8. Qualifications for Vibration Monitoring Personnel. The Contractor shall provide personnel for vibration monitoring who meet at least the following minimum qualifications. Personnel responsible for the implementation and operation of vibration monitoring procedures, including the vibration control specialist, shall be professional engineers registered in Florida with a background in geotechnical engineering and a minimum of 3 years of demonstrated experience in vibration monitoring and related Work. The Contractor shall provide documentation verifying the qualifications to the Contract Administrator for approval within two weeks after the date of Notice of Award and prior to issuance of the Notice to Proceed. The Contract Administrator can reject any individual(s) not meeting the qualifications specified and request resubmittal of other personnel at no cost to the County. Contractor shall immediately notify the Contract Administrator if any vibration monitoring personnel are replaced or removed from the project.

15. SITE CLEAN-UP AND RESTORATION

15.1. It is the intent of the TOWN that the work be accomplished with minimum disturbance to the natural resources adjacent to the work area (specifically the adjacent upland, lawns, landscaping, trees, and nearshore areas), and that the immediate and general vicinity of the work area remain in its pre-project state subsequent to completion of the work. All materials utilized by the CONTRACTOR during construction shall be removed from the site, including survey stakes, debris, flagging and other temporary survey controls.

15.2. Should the CONTRACTOR during the progress of the work, lose, dump, sink, or misplace any material (including stone or stone debris) or equipment which in the opinion of the ENGINEER may be considered unaesthetic, environmentally deleterious, TECHNICAL REQUIREMENTS TR-16 dangerous to the public, or impact private properties the CONTRACTOR shall recover and remove same within 24 hours of receipt of notice at no additional cost to the TOWN.

15.3. The CONTRACTOR shall arrange to have the upland area of hard surface roadway adjacent to this access area used for transport of construction equipment and materials swept of spilled stone and/or sand which resulted from the transport of material for this work. Collected stone and/or sand shall be disposed of in a manner acceptable to the ENGINEER, and shall not be placed upon the stockpile area, access corridor, beach or within the structure unless specifically authorized in writing by the ENGINEER.

15.4. The CONTRACTOR shall inspect the work areas at the end of every workday to ensure that all debris left by the CONTRACTOR’s and subcontractor’s workers has been removed from the work areas and properly disposed of. This includes, for example, lunch bags, soda cans, drink cups, cigarette butts, etc.

15.5. Upon completion of all construction activity, the CONTRACTOR shall clean and restore all staging, storage, transport, and work areas, fences, boardwalks, and other facilities to an equivalent pre-project condition or better to the approval of the TOWN. All restoration and remediation must be accomplished to the satisfaction of the TOWN.

16. PROJECT CLOSE-OUT

16.1. Final Inspections.

16.1.1. The Work will be thoroughly examined by the ENGINEER or TOWN’s designated representative as soon as practicable, and no later than one (1) week after the completion of the entire Work or any portion of the Work thereof. The Contractor or their authorized representative will be notified when the examinations are to be made and will be permitted to accompany the inspecting parties.

16.1.2. Should deficiencies in the Work be determined relative to the contract Plans and

Specifications, the Contractor will be required to correct same at the discretion and direction of the Engineer. No direct payment shall be made for corrections to the Work involving the removal and replacement of unacceptable materials, or site clean-up unless specifically allowed by the Engineer.

16.1.3. Final acceptance of the whole or a part of the Work and the deductions or corrections of deductions made thereon will not be reopened after having once been

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made, except on evidence of collusion, fraud or obvious error, and the acceptance of a completed section shall not change the time of payment of the retained percentages of the whole or any part of the Work.

16.2. Close-Out Submittals. CONTRACTOR shall submit the following:

16.2.1. Special guarantees and Bonds.

16.2.2. CONTRACTOR's waiver of liens.

16.2.3. Separate waivers of lien for Subcontractor’s, Suppliers, and others with lien rights against property of Owner.

16.2.4. Final payment estimate.

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PART II: MATERIALS

17. STONE

17.1. Armor Stone. All rock used as armor stone shall be clean, durable stone that will not disintegrate under the elements and will not break during handling. Armor stone shall be hard, close-grained rock, free of cracks, seams or other imperfections which might adversely affect its durability when exposed to weathering and the action of the sea. The minimum specific gravity of the armor stone shall be 2.65. Quarry certification of the armor stone's specific gravity is required.

17.2. Shape. All armor stone shall be roughly angular in shape, with the least dimension of any stone not being less than one-third of that stone’s greatest dimension. Flat armor stones will not be accepted.

17.3. Size. The gradation of the armor stone sizes (average nominal diameter) for the rock structures shall be as follows:

Median Size = 2.50 feet average nominal diameter Maximum Size = 3.00 feet average nominal diameter Minimum size = 2.00 feet average nominal diameter

17.4. At least 50 percent of the material shall be comprised of armor stones with an average nominal diameter between 2.50 and 3.00 feet. Armor stone with an average nominal diameter of less than 2 feet will be rejected. For the purposes of this specification, stone diameter (size) is defined as the averaged value of the stone's average dimension (average nominal diameter) measured in each of three perpendicular axes.

17.5. Armor stone shall be segregated into piles separate from chinking stone for inspection by the ENGINEER prior to placement. The CONTRACTOR shall set aside and place the largest armor stones delivered to the site on the seaward face or interior of the shore parallel section of each breakwater structure.

17.6. The ENGINEER reserves the right to instruct the CONTRACTOR to perform random drop tests on armor stone. For comparability, the test stone(s) should be dropped from a bucket, grapple, or cherry picker, or by other means from a height half the average diameter of the stone onto a rigid surface or second stone of comparable size. Dumping with other stones from a haul truck does not constitute a satisfactory test.

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17.6.1. The stone should be examined carefully before testing as well as afterward.

Failure criteria are breakage, development of new cracks, opening of old cracks, and loss of small pieces from the surface.

17.6.2. The stone shall be clean and free of dirt prior to delivery and installation at the project site.

17.7. The TOWN and ENGINEER reserve the right to refuse payment for armor stone delivered to the site any time prior to final acceptance which do not meet these Specifications. The CONTRACTOR shall remove unacceptable stone from the work site at no additional expense to the TOWN. Unacceptable stone removed from the site shall be returned to the quarry, the CONTRACTOR's yard, or otherwise disposed of at a permitted location. Armor stone which do not meet these Specifications may be used for chinking stone if the unacceptable armor stone meets the quality and size requirements for chinking stone.

17.8. Chinking Stone. All rock used as chinking stone shall be clean, durable stone that will not disintegrate under the elements and will not break during handling nor under the load of armor stone overlayers. Chinking stone shall be hard, close-grained rock, free of cracks, seams or other imperfections which might adversely affect its durability when exposed to weathering and the action of the sea. The minimum specific gravity of the chinking stone shall be 2.65. Quarry certification of the chinking stone's specific gravity will be required. All chinking stone shall be obtained from the same quarry as the armor stone.

17.9. All chinking stone shall be provided in random sizes varying between 10 and 15 inches

(average nominal diameter) and be roughly angular in shape. No chinking stone less than 10 inches in average nominal diameter will be allowed at the project site or placed within the structures discussed herein. Flat chinking stones will not be accepted.

17.10. The TOWN and ENGINEER reserve the right to refuse payment for chinking stone delivered to the site any time prior to final acceptance which do not meet these Specifications. The CONTRACTOR shall remove all unacceptable chinking stone including quarry run from the work site at no additional expense to the TOWN.

Unacceptable stone removed from the site shall be returned to the quarry, the CONTRACTOR's yard, or otherwise disposed of at a permitted location acceptable to the ENGINEER at the CONTRACTOR’s expense.

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18. MARINE MATTRESSES

18.1. The stone-filled marine mattresses shall be the Triton BX Marine Mattress System produced by Tensar Earth Technologies, Inc., Atlanta, GA or BaseLok Marine Mattress System by Industrial Fabrics Inc., Baton Rouge, LA, or approved equivalent. These compartmental rectangular mattresses shall be filled with stone. The required width and depth of the mattress units shall be as shown on the Plans. The mattress units shall be fabricated and filled off-site, transported to the work site, and lifted into place. Proposed equivalent products are subject to the approval of the ENGINEER.

18.2. Structural Geogrid. The marine mattresses and extensions shall be constructed of the structural geogrid Tensar BX 1500, or equivalent, an integrally formed grid structure manufactured of a stress resistant polypropylene or high-density polyethylene material with molecular weight and molecular characteristics which impart high resistance to loss of load capacity or structural integrity when the geogrid is subjected to mechanical stress in installation and/or long-term environmental stress.

18.3. Braid. The braid material shall be a hollow-core polyethylene braid and shall have a minimum diameter of 3/16 inch (nominal) with a breaking strength of not less than 400 lb load on a test specimen 36 inches in length. For UV stability, the braid material shall have a minimum carbon black content of 2.0% throughout.

18.4. Geotextile Fabric. The geotextile fabric to be attached to the underside of each marine mattress and extension shall be US Fabrics US1540, or equivalent, a woven mono-filament filtration geotextile.

18.5. The marine mattresses shall be filled offsite. The filling may be performed either by the CONTRACTOR or the manufacturer. Regardless of the means and methods of filling the mattresses, all mattresses delivered to the site shall meet the contract requirements at the time of installation. Care in lifting and on-site storage is therefore required. Failed or damaged mattresses may be rejected by the ENGINEER in lieu of repair.

19. MARINE MATTRESS FILL STONE

19.1. Quality. Stone for filling marine mattresses may be crushed stone. The stone shall be durable and of similar quality as the armor stone with a minimum specific gravity of 2.65 to ensure suitable performance in the mattresses and the climate at the work site. Stone shall be free from cracks, seams, and other defects that would tend to increase its

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deterioration in the mattresses. The inclusion of objectionable quantities of dirt, sand, clay, and rock fines shall not be permitted.

19.2. Gradation. Stone for filling marine mattresses shall be a well-graded mixture with the following gradation:

Sieve Size (inches) Percent Passing (by Weight) 4 100

3-1/2 90-100 2-1/2 25-60 1-1/2 0

This stone specification is generally equivalent to AASHTO M43, No 1 Coarse Aggregate, except with zero percent passing the 1-1/2 inch sieve.

20. GEOGRID/FABRIC COMPOSITE UNDERLAYMENT. The composite geogrid/filter fabric composite underlayment required for the structures shall be GC654050 produced by Tensar International Corporation, Alpharetta, GA, or equivalent as approved by Engineer (such as the BaseLok Grid Composite system by Industrial Fabrics, Inc., Baton Rouge, LA).

21. BACKFILL MATERIAL. The backfill material to be placed over excavated portions of the completed rock structure shall be clean sand excavated from the existing, restored beach. The sand shall free of debris, gravel, rocks, clay balls, peat or other organics, oil, pollutants and any other non-beach-compatible materials. Any fill material determined by the ENGINEER or the TOWN to be in non-compliance with these specifications, or otherwise non-beach compatible, shall be promptly removed by the CONTRACTOR at no expense to the TOWN.

Burial of such material within the beach/berm during backfilling is specifically and strictly prohibited. The backfill shall be shaped to approximately the elevations and grades that existed prior to installation of the structures. Backfilling shall not occur until verification by survey performed by the CONTRACTOR and concurrence by the ENGINEER. Any portion of the structure backfilled prior to acceptance by the ENGINEER shall be ineligible for payment.

22. SAFETY FENCE. Materials shall be as specified by the TOWN which are generally orange plastic mesh, at least 48 inches high, measured from grade, mounted on steel or wooden posts.

23. SIGNAGE. Materials for the required sign are detailed in the Drawings.

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PART III: EXECUTION

24. ORDER OF WORK

24.1. General. The CONTRACTOR shall, in the following order, clear and grade as necessary all construction access and storage areas, remove/relocate and provide temporary fencing, establish the project control, lay out the limits of the work, and subsequently (1) prepare the seabed or upland to the design grade as necessary, (2) install the marine mattresses and/or geogrid/fabric composite underlayment, (3) place the specified rock and chink as necessary, and (4) perform backfilling (as required), final grading, site restoration and perform post-construction surveys prior to final acceptance by the ENGINEER.

24.2. The CONTRACTOR shall construct the structures in the following order: S-6 in descending order to S-1, working from northwest to southeast, unless otherwise approved by the ENGINEER. The CONTRACTOR may elect to construct more than one structure at a time so long and the structures are completed in the required order noted above.

24.3. Prior to commencement of work at the project site, the CONTRACTOR shall propose the order and methodology by which they plan to do the work. No work at the project site shall begin until a Notice-to-Proceed and concurrence with the order and methodology as described by the CONTRACTOR’s Work Plan are issued by the TOWN.

24.4. Measurement for Control. Horizontal and vertical control data for the work are shown on the Plans. The CONTRACTOR shall use this control data in establishing control methods by survey for the project and shall be responsible for maintaining the correct horizontal and vertical location of the groin until final acceptance. Tabulated and other noted positions, locations, elevations, and distances are to be used to layout and control the work. The Plans themselves are strictly for depiction purposes only and noted scales are approximate. The CONTRACTOR shall not use the Plans to scale information for purposes of controlling the work.

24.5. All levels and measurements as specified on the Plans are binding for the

CONTRACTOR. If it is deemed necessary by the ENGINEER to modify detail dimensions and/or levels during the execution, this will not form basis for price changes so long as these modifications do not increase the quantity of materials beyond that provided for herein, or the complexity of the work.

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24.6. Excavation of Existing Grade. The CONTRACTOR shall excavate to -2 ft NAVD88 or the lower limit of sand, whichever occurs first, and backfill as necessary to construct the structures as represented by the Plans. The CONTRACOTR shall not excavate clay materials. The ENGINEER may elect, and reserves the right, to modify any portions of a structure due to naturally occurring changes in site conditions.

24.7. Washing-in of Backfill. The CONTRACTOR shall wash in the backfill material to the extent practicable with an excavator bucket or similar to fill the structure voids with sand.

25. TRANSPORT OF MATERIALS

25.1. The method of transporting construction materials to and from the work areas shall be by truck, or other means acceptable…